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47283618
|
10.1103/PhysRevE.87.063001
|
18 pages, 9 figures, 37 references. Other author's papers can be downloaded at http://www.denys-dutykh.com/International audienceExtreme surface waves in deep-water long-crested sea are often interpreted as a manifestation in real world of the so-called breathing solitons of the focusing nonlinear Schrodinger equation. While the spontaneous emergence of such coherent structures from nonlinear wave dynamics was demonstrated to take place in fiber optics systems, the same point remains far more controversial in the hydrodynamic case. With the aim to shed further light on this matter, the emergence of breather-like coherent wave groups in long-crested random sea is here investigated by means of high-resolution spectral simulations of the fully nonlinear two-dimensional Euler equations. Our study is focused on parametrizing the structure of random wave fields with respect to the Benjamin--Feir index, which is a nondimensional measure of the energy localization in Fourier space. This choice is motivated by previous results, showing that extreme-wave activity in long-crested sea is highly sensitive to this parameter. It is found that coherent wave groups do develop within wave fields characterized by sufficiently narrow-banded spectra, and that such coherent structures closely match realizations of Kuznetsov--Ma breathes in Euler dynamics. The characteristic spatial and temporal scales of wave group dynamics, and the corresponding occurrence of extreme events, are quantified and discussed by mean of space-time autocorrelations of the surface elevation envelope and extreme events statistics
|
The emergence of coherent wave groups in deep-water random sea
|
the emergence of coherent wave groups in deep-water random sea
|
pages references. papers downloaded audienceextreme crested interpreted manifestation breathing solitons focusing schrodinger equation. spontaneous emergence coherent fiber optics controversial hydrodynamic case. shed emergence breather coherent crested euler equations. focused parametrizing benjamin feir nondimensional localization fourier space. motivated extreme crested parameter. coherent sufficiently narrow banded coherent closely match realizations kuznetsov breathes euler dynamics. occurrence extreme quantified autocorrelations elevation envelope extreme
|
exact_dup
|
[
"54036133"
] |
47308088
|
10.1103/PhysRecD.78.014019
|
35 pages and 39 figures. Comments, appendices, figures, references added. Version to appear in Phys. Rev. DInternational audienceThe hadronic kt-spectrum inside a high energy jet is determined including corrections of relative magnitude O{\sqrt{\alpha_s}} with respect to the Modified Leading Logarithmic Approximation (MLLA), in the limiting spectrum approximation (assuming an infrared cut-off Q0 =Lambda_{QCD}) and beyond Q_0\ne\Lambda_{QCD}. The results in the limiting spectrum approximation are found to be, after normalization, in impressive agreement with preliminary measurements by the CDF collaboration, unlike what occurs at MLLA, pointing out small overall non-perturbative contributions. Within the same framework, 2-particle correlations inside a jet are also predicted at NMLLA and compared to previous MLLA calculations
|
Next-to-MLLA corrections to single inclusive kt-distributions and 2-particle correlations in a jet
|
next-to-mlla corrections to single inclusive kt-distributions and 2-particle correlations in a jet
|
pages figures. comments appendices added. phys. rev. dinternational audiencethe hadronic sqrt alpha logarithmic mlla limiting infrared lambda lambda limiting normalization impressive preliminary unlike mlla pointing perturbative contributions. nmlla mlla
|
exact_dup
|
[
"47116998"
] |
47340259
|
10.1007/978-3-642-29578-2_16
|
International audienceDefining pedagogical indexation of texts for language learning as an indexation allowing users to query for texts in order to use them in language teaching requires to take into account the influence of the properties of the teaching situation we define as " pedagogical context ". We propose to justify the notions of prisms and facets on which our model rely through the description of material selection in the task of planing a language class as an adaptation of Yinger's model of planing. This interpretation of Yinger's model is closely intertwined with the elaboration of the notion of pedagogical context. The latter provides sounder bases on which to build our model on. This resulted in improvements in the potentialities of the model compared to its first published version. The MIRTO project, started in 2001, stemmed from the observation of various recurrent issues in Computer Assisted Language Learning (CALL) systems: rigidity, inability to adapt the learning sequences to learners and unavailability of means to manipulate concepts pertaining to the teachers' field of expertise (language didactics) [1]. The aim of MIRTO was to promote the use of Natural Language Processing (NLP) to address those problems by adding an abstraction layer between the user and the material. Antoniadis et al. consider that the formulation of problems in didactics relevant terms depends on handling language not as character sequences but as a system of forms and concepts [1]. MIRTO thus proposes to separate treatments (e.g. gap-filling exercise generation script) and the data on which they are to be applied (a text in this case)
|
“Facets” and “Prisms” as a Means to Achieve Pedagogical Indexation of Texts for Language Learning: Consequences of the Notion of Pedagogical Context
|
“facets” and “prisms” as a means to achieve pedagogical indexation of texts for language learning: consequences of the notion of pedagogical context
|
audiencedefining pedagogical indexation texts indexation allowing query texts teaching teaching pedagogical propose justify notions prisms facets rely planing adaptation yinger planing. yinger closely intertwined elaboration notion pedagogical context. sounder bases build resulted improvements potentialities version. mirto started stemmed recurrent assisted call rigidity inability adapt learners unavailability manipulate concepts pertaining teachers expertise didactics mirto promote adding abstraction material. antoniadis formulation didactics handling character concepts mirto proposes treatments e.g. filling exercise script
|
exact_dup
|
[
"51934188"
] |
47346158
|
10.1016/j.sexol.2015.05.002
|
International audienceIn sexual matters, the concept of consent has recently come to the forefront. The concept allows a distinction to be made, notably from a legal standpoint, between what is considered to be raped and what is not. It is however a concept that is difficult to define with any clarity; its boundaries are fuzzy and it is the subject of much controversy, particularly with regard to the issues of prostitution and sadomasochistic practices (BDSM) within the ethics of sexuality. The purpose of this article is to attempt to clarify the terms of the debate. It firstly questions the foundations of sexual consent by analysing the differences or the conceptual confusion between desire and will, based initially on a reading of the philosophers of the 17th century René Descartes and Baruch Spinoza, who have opposing ideas with regard to the position of desire relative to intellect in human beings, before moving on to the psychoanalyst Sigmund Freud, who introduces the idea of unconscious desire. The article then shows that the impossibility of absolute liberty, and therefore consent free of any constraint, leads certain feminist organisations to question individual consent, even when it has been clearly formulated, and to invoke against this the notion of human dignity in a transcending sense, inspired by Immanuel Kant, the German philosopher of the 18th century. This concept is examined and studied in cases of prostitution and sadomasochism (BDSM). The conceptual analysis ultimately reveals the metaphysical nature both of the individualistic approach of consent and of the Kant-inspired approach of human dignity
|
The question of sexual consent: between individual liberty and human dignity
|
the question of sexual consent: between individual liberty and human dignity
|
audiencein sexual matters consent come forefront. distinction notably legal standpoint raped not. clarity boundaries fuzzy controversy regard prostitution sadomasochistic practices bdsm ethics sexuality. attempt clarify debate. firstly foundations sexual consent analysing conceptual confusion desire initially reading philosophers century rené descartes baruch spinoza opposing ideas regard desire intellect beings moving psychoanalyst sigmund freud introduces unconscious desire. impossibility liberty consent feminist organisations consent formulated invoke notion dignity transcending inspired immanuel kant german philosopher century. prostitution sadomasochism bdsm conceptual ultimately reveals metaphysical individualistic consent kant inspired dignity
|
exact_dup
|
[
"47306400"
] |
47370507
|
10.1007/s12671-015-0467-7
|
International audienceThis study aims to characterize the relationships between intrinsic motivation towards physical activity, mindfulness, and physical activity level. We measured self-reported mindfulness, motivational regulation towards exercise, and physical activity level in 280 French students. Analyses conducted on 244 participants revealed that self-reported mindfulness moderates the relationship between intrinsic motivation towards exercise and physical activity levels. These findings may have implications for interventionists seeking to promote increased physical activity with mindfulness-based techniques. In fact, it seems that increasing mindfulness skills of individuals could improve their intrinsic motivation to exercise and thus, physical activity
|
Mindfulness May Moderate the Relationship Between Intrinsic Motivation and Physical Activity: A Cross-Sectional Study
|
mindfulness may moderate the relationship between intrinsic motivation and physical activity: a cross-sectional study
|
audiencethis aims characterize intrinsic motivation mindfulness level. mindfulness motivational exercise french students. mindfulness moderates intrinsic motivation exercise levels. interventionists seeking promote mindfulness techniques. mindfulness skills intrinsic motivation exercise
|
exact_dup
|
[
"47326987",
"52191195"
] |
47739517
|
10.1016/j.euroecorev.2009.12.001
|
International audienceThis paper investigates the presence of local export spillovers on both the extensive (the decision to start exporting) and the intensive (the export volume) margins of trade, using data on French individual export flows, at the product-level and by destination country, between 1998 and 2003. We investigate whether the individual decision to start exporting and exported volume are influenced by the presence of nearby product and/or destination specific exporters, using a gravity-type equation estimated at the firm-level. Spillovers are considered at a fine geographical level corresponding to employment areas (348 in France). We control for the new economic geography-type selection of firms into agglomerated areas, and for the local price effects of firms agglomeration
|
Local Export spillovers in France
|
local export spillovers in france
|
audiencethis investigates export spillovers extensive exporting intensive export margins trade french export flows destination exporting exported influenced nearby destination exporters firm level. spillovers fine geographical employment geography firms agglomerated firms agglomeration
|
exact_dup
|
[
"52825620"
] |
47811951
|
10.1007/s11238-010-9205-8
|
International audienceWe report in this paper the result of three experiments on risk, ambiguity and time attitude. The first two differed by the population considered (students vs. general population) while the third one used a different protocol and concerned students and portfolio managers. We find quite a lot of heterogeneity at the individual level. Of principal interest was the elicitation of risk, time and ambiguity attitudes and the relationship among these (model free) measures. We find that on the student population, there is essentially no correlation. A non negligible fraction of the population behaves in an extremely cautious manner in the risk and ambiguity domain. When we drop this population from the sample, the correlation between our measures is also non significant. We also raise three questions linked to measurement of ambiguity attitudes that come out from our data sets
|
An experimental investigation of imprecision attitude and its relation with risk attitude and impatience
|
an experimental investigation of imprecision attitude and its relation with risk attitude and impatience
|
audiencewe ambiguity attitude. differed concerned portfolio managers. heterogeneity level. principal elicitation ambiguity attitudes measures. student essentially correlation. negligible behaves extremely cautious manner ambiguity domain. drop significant. raise ambiguity attitudes come
|
exact_dup
|
[
"47775662",
"52197900",
"52827220"
] |
48157443
|
10.1016/j.scico.2016.02.008
|
International audienceRuntime enforcement is a verification/validation technique aiming at correcting possibly incorrect executions of a system of interest. In this paper, we consider enforcement monitoring for systems where the physical time elapsing between actions matters. Executions are thus modelled as timed words (i.e., sequences of actions with dates). We consider runtime enforcement for timed specifications modelled as timed automata. Our enforcement mechanisms have the power of both delaying events to match timing constraints, and suppressing events when no delaying is appropriate, thus possibly allowing for longer executions. To ease their design and their correctness-proof, enforcement mechanisms are described at several levels: enforcement functions that specify the input-output behaviour in terms of transformations of timed words, constraints that should be satisfied by such functions, enforcement monitors that describe the operational behaviour of enforcement functions, and enforcement algorithms that describe the implementation of enforcement monitors. The feasibility of enforcement monitoring for timed properties is validated by prototyping the synthesis of enforcement monitors from timed automata
|
Runtime Enforcement of Regular Timed Properties by Suppressing and Delaying Events
|
runtime enforcement of regular timed properties by suppressing and delaying events
|
audienceruntime enforcement verification validation aiming correcting possibly incorrect executions interest. enforcement elapsing matters. executions modelled timed i.e. dates runtime enforcement timed specifications modelled timed automata. enforcement delaying match timing suppressing delaying possibly allowing executions. ease correctness enforcement enforcement specify transformations timed satisfied enforcement monitors operational enforcement enforcement enforcement monitors. feasibility enforcement timed validated prototyping enforcement monitors timed automata
|
exact_dup
|
[
"51934774"
] |
48165256
|
10.1002/mop.29363
|
International audienceThis paper addresses the problem of measuring superdirective Electrically Small Antennas (ESAs) mounted on Printed Circuit Broads (PCBs). Different configurations for connecting the excitation system (SMA connector and coaxial cable) to an array of 31x25mm2 integrated in a PCB of 110x70mm2 are studied. This configurations are evaluated based on the cable effect on the array’s input reflection coefficient and radiation pattern. Obtained results show that properly connecting the cable with the array mitigates its effect, and hence, it can be measured
|
Measuring Superdirective Electrically Small Antenna Arrays Mounted on PCBs
|
measuring superdirective electrically small antenna arrays mounted on pcbs
|
audiencethis addresses measuring superdirective electrically antennas esas mounted printed circuit broads pcbs configurations connecting connector coaxial cable array studied. configurations cable array’s reflection pattern. properly connecting cable array mitigates
|
exact_dup
|
[
"52994908"
] |
48183475
|
10.1016/j.envsoft.2011.10.011
|
International audienceIn this paper, non-homogeneous Markov-Switching Autoregressive (MS-AR) models are proposed to describe wind time series. In these models, several au-toregressive models are used to describe the time evolution of the wind speed and the switching between these different models is controlled by a hidden Markov chain which represents the weather types. We first block the data by month in order to remove seasonal components and propose a MS-AR model with non-homogeneous autoregressive models to describe daily components. Then we discuss extensions where the hidden Markov chain is also non-stationary to handle seasonal and inter-annual fluctuations. The different models are fitted using the EM algorithm to a long time series of wind speed measurement on the Island of Ouessant (France). It is shown that the fitted models are interpretable and provide a good description of im-portant properties of the data such as the marginal distributions, the second-order structure or the length of the stormy and calm periods
|
Markov-switching autoregressive models for wind time series
|
markov-switching autoregressive models for wind time series
|
audiencein homogeneous markov switching autoregressive series. toregressive switching hidden markov weather types. month remove seasonal propose homogeneous autoregressive components. extensions hidden markov stationary handle seasonal fluctuations. fitted island ouessant fitted interpretable portant marginal stormy calm
|
exact_dup
|
[
"52842276"
] |
48184849
|
10.1016/j.physrep.2014.05.003
|
International audienceIt has been for a long time recognized that nanoparticles are of great scientific interest as they are effectively a bridge between bulk materials and atomic structures. At first, size effects occurring in single elements have been studied. More recently, progress in chemical and physical synthesis routes permitted the preparation of more complex structures. Such structures take advantages of new adjustable parameters including stoichiometry, chemical ordering, shape and segregation opening new fields with tailored materials for biology, mechanics, optics magnetism, chemistry catalysis, solar cells and microelectronics. Among them, core/shell structures are a particular class of nanoparticles made with an inorganic core and one or several inorganic shell layer(s). In earlier work, the shell was merely used as a protective coating for the core. More recently, it has been shown that it is possible to tune the physical properties in a larger range than that of each material taken separately. The goal of the present review is to discuss the basic properties of the different types of core/shell nanoparticles including a large variety of heterostructures. We restrict ourselves on all inorganic (on inorganic/inorganic) core/shell structures. In the light of recent developments, the applications of inorganic core/shell particles are found in many fields including biology, chemistry, physics and engineering. In addition to a representative overview of the properties, general concepts based on solid state physics are considered for material selection and for identifying criteria linking the core/shell structure and its resulting properties. Chemical and physical routes for the synthesis and specific methods for the study of core/shell nanoparticle are briefly discussed
|
Engineered inorganic core/shell nanoparticles
|
engineered inorganic core/shell nanoparticles
|
audienceit recognized nanoparticles great effectively bridge structures. occurring studied. progress routes permitted preparation structures. advantages adjustable stoichiometry ordering segregation opening tailored mechanics optics magnetism catalysis microelectronics. nanoparticles inorganic inorganic merely protective coating core. tune separately. goal nanoparticles heterostructures. restrict inorganic inorganic inorganic structures. developments inorganic engineering. overview concepts identifying linking properties. routes nanoparticle briefly
|
exact_dup
|
[
"51946573",
"52679424",
"52998783"
] |
48262541
|
10.1016/j.heares.2007.12.003
|
International audienceTemporal envelope processing in the human auditory cortex has an important role in language analysis. In this paper, depth recordings of local field potentials in response to amplitude modulated white noises were used to design maps of activation in primary, secondary and associative auditory areas and to study the propagation of the cortical activity between them. The comparison of activations between auditory areas was based on a signal-to-noise ratio associated with the response to amplitude modulation (AM). The functional connectivity between cortical areas was quantified by the directed coherence (DCOH) applied to auditory evoked potentials. This study shows the following reproducible results on twenty subjects: (1) the primary auditory cortex (PAC), the secondary cortices (secondary auditory cortex (SAC) and planum temporale (PT)), the insular gyrus, the Brodmann area (BA) 22 and the posterior part of T1 gyrus (T1Post) respond to AM in both hemispheres. (2) A stronger response to AM was observed in SAC and T1Post of the left hemisphere independent of the modulation frequency (MF), and in the left BA22 for MFs 8 and 16Hz, compared to those in the right. (3) The activation and propagation features emphasized at least four different types of temporal processing. (4) A sequential activation of PAC, SAC and BA22 areas was clearly visible at all MFs, while other auditory areas may be more involved in parallel processing upon a stream originating from primary auditory area, which thus acts as a distribution hub. These results suggest that different psychological information is carried by the temporal envelope of sounds relative to the rate of amplitude modulation
|
Temporal envelope processing in the human auditory cortex: Response and interconnections of auditory cortical areas.
|
temporal envelope processing in the human auditory cortex: response and interconnections of auditory cortical areas.
|
audiencetemporal envelope auditory cortex analysis. recordings potentials modulated noises associative auditory propagation cortical them. activations auditory modulation connectivity cortical quantified directed coherence dcoh auditory evoked potentials. reproducible twenty auditory cortex cortices auditory cortex planum temporale insular gyrus brodmann posterior gyrus respond hemispheres. stronger hemisphere modulation right. propagation emphasized processing. sequential visible auditory stream originating auditory acts hub. psychological envelope sounds modulation
|
exact_dup
|
[
"52464926"
] |
48594828
|
10.1007/978-3-319-07674-4_80
|
Internet Service Providers (ISPs) nowadays deal with high demand to promote good quality information. However, the knowledge to develop new pricing scheme that serve both customers and supplier is known, but only a few pricing plans involve QoS networks. This study will seek new proposed pricing plans are offered with multi service multi link networks involved. The multi service multi link Networks scheme is solved as an optimization model by \ud
comparing two models in multi QoS networks. The results showed that by fixing the base price and varying the quality premium or varying the base price and quality and setting up the equal capacity link values, ISP achieved the goal to maximize the profit
|
The Improved Models of Internet Pricing Scheme of \ud
Multi Service Multi Link Networks with Various \ud
Capacity Links
|
the improved models of internet pricing scheme of \ud multi service multi link networks with various \ud capacity links
|
internet providers isps nowadays deal promote information. pricing serve customers supplier pricing plans involve networks. seek pricing plans offered involved. solved networks. fixing premium goal maximize profit
|
exact_dup
|
[
"151438712"
] |
49292316
|
10.1016/j.strusafe.2006.09.001
|
International audienceMaintaining and operating civil infrastructure systems has been recognized as a critical issue worldwide. Among all possible causes of safety reduction during the structural lifetime, deteriora- tion is particularly important. Structural deterioration is usually a slow time-dependent process controlled by safety and operation threshold specifications. This paper presents a model of RC deterioration by coupling biodeterioration (i.e., chemical, physical and mechanical action of live organisms), steel corrosion, and concrete cracking. The final purpose of the model is to compute the reduction of the concrete section and the area of steel reinforcement in order to assess the change of structural capacity with time. Given the uncertainties in both the parameters and the model, the probabilistic nature of loads, the material properties and the difussion process are taken into account to evaluate structural reliability. The model is illustrated with an example where the inelastic behavior of a pile subject to random loading is considered. The results of the analysis have shown that the effect of biodeterioration on the structural performance is significant and can cause an important reduction of its lifetime. On the whole, the paper states that modeling the effects of biodeterioration in RC structures should be included as part of infrastructure planning and design, especially, when they are located in aggressive environments
|
Coupled reliability model of biodeterioration, chloride ingress and cracking for reinforced concrete structures
|
coupled reliability model of biodeterioration, chloride ingress and cracking for reinforced concrete structures
|
audiencemaintaining operating civil infrastructure recognized worldwide. lifetime deteriora important. deterioration slow specifications. presents deterioration biodeterioration i.e. live organisms steel corrosion concrete cracking. concrete steel reinforcement time. probabilistic loads difussion reliability. illustrated inelastic pile loading considered. biodeterioration lifetime. biodeterioration infrastructure planning aggressive environments
|
exact_dup
|
[
"53006675"
] |
50618317
|
10.1103/PhysRevC.74.017304
|
The alpha decay half-lives of the recently produced isotopes of the 112, 114, 116 and 118 nuclei and decay products have been calculated in the quasi-molecular shape path using the experimental Qalpha value and a Generalized Liquid Drop Model including the proximity effects between nucleons in the neck or the gap between the nascent fragments. Reasonable estimates are obtained for the observed alpha decay half-lives. The results are compared with calculations using the Density-Dependent M3Y effective interaction and the Viola-Seaborg-Sobiczewski formulae. Generalized Liquid Drop Model predictions are provided for the alpha decay half-lives of other superheavy nuclei using the Finite Range Droplet Model Qalpha and compared with the values derived from the VSS formulae
|
alpha decay half-lives of new superheavy nuclei within a generalized liquid drop model
|
alpha decay half-lives of new superheavy nuclei within a generalized liquid drop model
|
alpha lives isotopes nuclei quasi qalpha drop proximity nucleons neck nascent fragments. reasonable alpha lives. viola seaborg sobiczewski formulae. drop alpha lives superheavy nuclei droplet qalpha formulae
|
exact_dup
|
[
"46778911",
"152346584",
"53023102"
] |
51216742
|
10.1002/spe.1143
|
International audienceThe complexity of modern embedded systems increases as they incorporate new concerns such as distribution and mobility. These new features need to be considered as early as possible in the software development lifecycle. Model Driven Engineering (MDE), that promotes an intensive use of models and is now widely seen as a solution to master the development of complex systems such as embedded ones. Component-Based Software Engineering (CBSE) is another major trend that gains acceptance in the embedded world due to its properties such as reuse, modularity and flexibility. This article proposes the Flex-eWare Component Model FCM for designing and implementing modern embedded systems. The FCM unifies MDE and CBSE and has been evaluated in several application domains with different requirements: wireless sensor networks, distributed client/server applications, and control systems for electrical devices. This approach highlights a new concept: flexibility points, that arise at several stages of the development process: in the model (design phase), in the execution platform and during the execution itself. This flexibility points are captured with model libraries that can extend the Flex-eWare Component Model
|
Flex-eWare: a Flexible MDE-based Solution for Designing and Implementing Embedded Distributed Systems
|
flex-eware: a flexible mde-based solution for designing and implementing embedded distributed systems
|
audiencethe modern embedded incorporate concerns mobility. lifecycle. promotes intensive widely master embedded ones. cbse gains acceptance embedded reuse modularity flexibility. proposes flex eware designing implementing modern embedded systems. unifies cbse wireless sensor client server electrical devices. highlights flexibility arise execution platform execution itself. flexibility captured libraries extend flex eware
|
exact_dup
|
[
"52690686"
] |
51228355
|
10.1002/hyp.9264
|
All that glitters is not gold is one of those universal truths that also applies to hydrology, and particularly to the issue of model calibration, where a glittering mathematical optimum is too often mistaken for a hydrological optimum. This commentary aims at underlining the fact that calibration difficulties have not disappeared with the advent of the latest search algorithms. While it is true that progress on the numerical front has allowed us to quasi-eradicate miscalibration issues, we still too often underestimate the remaining hydrological task: screening mathematical optima in order to identify those parameter sets which will also work sufficiently outside the calibration period
|
All that glitters is not gold: the case of calibrating hydrological models
|
all that glitters is not gold: the case of calibrating hydrological models
|
glitters gold universal truths applies hydrology calibration glittering mathematical optimum mistaken hydrological optimum. commentary aims underlining calibration difficulties disappeared advent latest algorithms. progress front quasi eradicate miscalibration underestimate hydrological screening mathematical optima sufficiently calibration
|
exact_dup
|
[
"52686927"
] |
51941236
|
10.1093/intimm/dxv025
|
International audienceThe MSRV (multiple sclerosis-associated retrovirus) belongs to the human endogenous retrovirus HERV-W family. The envelope protein originating from the MSRV has been found in most patients with multiple sclerosis (MS). This protein (Env-ms) has pro-inflammatory properties for several types of immune cells and could therefore play a role in MS pathogenesis by promoting the leukocyte diapedesis observed in the central nervous system of patients. Our study aims to analyze the effects of Env-ms on the blood–brain barrier (BBB) at a molecular and functional level. We demonstrate that the recombinant MSRV envelope is able to stimulate several inflammatory parameters in a human BBB in vitro model, the HCMEC/D3 brain endothelial cell line. Indeed, Env-ms induces over-expression of ICAM-1, a major mediator of leukocyte adhesion to endothelial cells, in a dose-dependent manner as well as a strong dose-dependent production of the pro-inflammatory cytokines IL-6 and IL-8. Furthermore, using a silencing approach with siRNAs, we show that Env-ms is recognized via the Toll-like receptor 4 receptor, a pattern recognition receptor of innate immunity present on endothelial cells. We also show, using functional assays, that treatment of brain endothelial cells with Env-ms significantly stimulated the adhesion and the transmigration of activated immune cells through a monolayer of endothelial cells. These findings support the hypothesis that MSRV could be involved in the pathogenesis of MS disease or at least in maintenance of inflammatory conditions, thus fueling the auto-immune disorder. MSRV could also play a role in other chronic inflammatory diseases
|
Inflammatory response of endothelial cells to a human endogenous retrovirus associated with multiple sclerosis is mediated by TLR4
|
inflammatory response of endothelial cells to a human endogenous retrovirus associated with multiple sclerosis is mediated by tlr4
|
audiencethe msrv sclerosis retrovirus belongs endogenous retrovirus herv family. envelope originating msrv sclerosis inflammatory immune pathogenesis promoting leukocyte diapedesis nervous patients. aims analyze blood–brain barrier level. recombinant msrv envelope stimulate inflammatory hcmec endothelial line. induces icam mediator leukocyte adhesion endothelial manner inflammatory cytokines silencing sirnas recognized toll recognition innate immunity endothelial cells. assays endothelial stimulated adhesion transmigration immune monolayer endothelial cells. msrv pathogenesis maintenance inflammatory fueling auto immune disorder. msrv inflammatory
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exact_dup
|
[
"52192569"
] |
51942507
|
10.1103/PhysRevLett.107.188102
|
International audienceThe precise role of the microenvironment on tumor growth is poorly understood. Whereas the tumor is in constant competition with the surrounding tissue, little is known about the mechanics of this interaction. Using a novel experimental procedure, we study quantitatively the effect of an applied mechanical stress on the long-term growth of a spheroid cell aggregate. We observe that a stress of 10 kPa is sufficient to drastically reduce growth by inhibition of cell proliferation mainly in the core of the spheroid. We compare the results to a simple numerical model developed to describe the role of mechanics in cancer progression
|
Stress clamp experiments on multicellular tumor spheroids
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stress clamp experiments on multicellular tumor spheroids
|
audiencethe precise microenvironment poorly understood. competition surrounding mechanics interaction. quantitatively spheroid aggregate. drastically proliferation spheroid. mechanics progression
|
exact_dup
|
[
"47089959"
] |
51965929
|
10.1063/1.4813812
|
International audienceAccurate predictions of scalar fields advected by a turbulent flow is needed for various industrial and geophysical applications. In the framework of large-eddy simulation (LES), a subgrid-scale (SGS) model for the subgrid-scale scalar flux has to be used. The gradient model, which is derived from a Taylor series expansions of the filtering operation is a well-known approach to model SGS scalar fluxes. This model is known to lead to high correlation level with the SGS scalar flux. However, this type of model can not be used in practical LES because it does not lead to enough global scalar variance transfer from the large to the small scales. In this work, a regularization of the gradient model is proposed based on a physical interpretation of this model. The impact of the resolved velocity field on the resolved scalar gradient is decomposed into compressional, stretching and rotational effects. It is shown that rotational effect is not associated with transfers of variance across scales. Conversely, the compressional effect is shown to lead to forward transfer, whereas the stretching effect leads to back-scatter of scalar variance. The proposed regularization is to neglect the stretching effect in the model formulation. The accuracy of this regularized gradient model is tested in comparison with direct numerical simulations (DNS) and compared with other classic SGS models. The accuracy of the regularized gradient model is evaluated in term of structural and functional performances, i.e. the model ability to locally approximate the SGS unknown term and to reproduce its global effect on tracer variance, respectively. It is found that the regularized gradient model associated with a dynamic procedure exhibits good performances in comparison with the standard dynamic eddy diffusivity model and the standard gradient model. In particular, the dynamic regularized gradient model provides a better prediction of scalar variance transfers than the standard gradient model. The dynamic regularized gradient model is then evaluated in a series of large-eddy simulations. This shows a substantial improvement for various scalar statistics predictions
|
A dynamic regularized gradient model of the subgrid-scale scalar flux for large eddy simulations
|
a dynamic regularized gradient model of the subgrid-scale scalar flux for large eddy simulations
|
audienceaccurate advected turbulent industrial geophysical applications. eddy subgrid subgrid used. taylor expansions filtering fluxes. flux. practical scales. regularization model. resolved resolved decomposed compressional stretching rotational effects. rotational transfers scales. conversely compressional stretching scatter variance. regularization neglect stretching formulation. regularized classic models. regularized performances i.e. locally approximate unknown reproduce tracer respectively. regularized exhibits performances eddy diffusivity model. regularized transfers model. regularized eddy simulations. substantial
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exact_dup
|
[
"52725194"
] |
52195880
|
10.1080/09540121.2011.596515
|
International audienceThis study, based on data from the MANIF 2000 cohort study, investigates the relationship between the lending of injecting equipment, drug use and experience with HIV care. The sample comprised 224 HIV-HCV-coinfected patients who reported having injected drugs in the previous 6 months and their 538 visits to clinical services. Longitudinal data were collected for medical status, and self-reported risk behaviors. A logistic regression GEE model was used to identify correlates of distributive sharing. After multiple adjustment, patients who reported trust in physicians were significantly less likely to report lending injection equipment while cocaine users were at increased risk. Promoting dialogue between physicians and IDUs may play an important role in HIV-HCV positive prevention
|
Distributive sharing among HIV-HCV co-infected injecting drug users: the preventive role of trust in one's physician
|
distributive sharing among hiv-hcv co-infected injecting drug users: the preventive role of trust in one's physician
|
audiencethis manif cohort investigates lending injecting equipment care. comprised coinfected injected drugs visits services. longitudinal behaviors. logistic correlates distributive sharing. adjustment trust physicians lending injection equipment cocaine risk. promoting dialogue physicians idus prevention
|
exact_dup
|
[
"52445975"
] |
52465517
|
10.1097/QAD.0b013e3282f1d49f
|
International audienceBACKGROUND: Macroeconomic policy requirements may limit the capacity of national and international policy-makers to allocate sufficient resources for scaling-up access to HIV care and treatment in developing countries. METHOD: An endogenous growth model, which takes into account the evolution of society's human capital, was used to assess the macroeconomic impact of policies aimed at scaling-up access to HIV/AIDS treatment in six African countries (Angola, Benin, Cameroon, Central African Republic, Ivory Coast and Zimbabwe). RESULTS: The model results showed that scaling-up access to treatment in the affected population would limit gross domestic product losses due to AIDS although differently from country to country. In our simulated scenarios of access to antiretroviral therapy, only 10.3% of the AIDS shock is counterbalanced in Zimbabwe, against 85.2% in Angola and even 100.0% in Benin (a total recovery). For four out of the six countries (Angola, Benin, Cameroon, Ivory Coast), the macro-economic gains of scaling-up would become potentially superior to its associated costs in 2010. CONCLUSION: Despite the variability of HIV prevalence rates between countries, macro-economic estimates strongly suggest that a massive investment in scaling-up access to HIV treatment may efficiently counteract the detrimental long-term impact of the HIV pandemic on economic growth, to the extent that the AIDS shock has not already driven the economy beyond an irreversible 'no-development epidemiological trap'
|
'Time is costly': modelling the macroeconomic impact of scaling-up antiretroviral treatment in sub-Saharan Africa.
|
'time is costly': modelling the macroeconomic impact of scaling-up antiretroviral treatment in sub-saharan africa.
|
audiencebackground macroeconomic makers allocate countries. endogenous capital macroeconomic policies aimed aids african angola benin cameroon african republic ivory coast zimbabwe gross domestic losses aids differently country. scenarios antiretroviral aids shock counterbalanced zimbabwe angola benin recovery angola benin cameroon ivory coast macro gains potentially superior prevalence macro massive investment efficiently counteract detrimental pandemic aids shock economy irreversible epidemiological trap
|
exact_dup
|
[
"52199629"
] |
52618692
|
10.1016/j.triboint.2012.10.002
|
International audienceThis paper considers the degradation of alumina and zirconia toughened alumina vs. alumina for hip implants. The materials are as assumed to be load bearing surfaces subjected to shocks in wet conditions. The load is a peak of force; 9 kN was applied over 15 ms at 2 Hz for 800,000 cycles. The volumetric wear and roughness are lower for ZTA than for alumina. The long ZTA ageing did not seem to have a direct influence on the roughness. The ageing increased the wear volumes of ZTA and it was found to have a higher wear resistance compared to alumina
|
Degradation of alumina and zirconia toughened alumina (ZTA) hip prostheses tested under microseparation conditions in a shock device
|
degradation of alumina and zirconia toughened alumina (zta) hip prostheses tested under microseparation conditions in a shock device
|
audiencethis considers degradation alumina zirconia toughened alumina alumina implants. bearing subjected shocks conditions. cycles. volumetric wear roughness alumina. ageing seem roughness. ageing wear volumes wear alumina
|
exact_dup
|
[
"52309614",
"52723345"
] |
52635192
|
10.1016/j.tecto.2013.05.021
|
International audienceA detailed magnetic mapping using Anisotropy of Magnetic Susceptibility (AMS) technique was carried out in Pointe Géologie archipelago (Terre Adélie, East Antarctica) that represents a hot crust having experienced a long-lived anatectic event during Paleoproterozoic times, 1.69 Ga ago. AMS measurements allowed to better analyse the tectonic structure of the crystalline basement that is built up by rocks affected by various degrees of partial melting and then, devoid of clear strain markers. AMS sampling was performed from main rocks types of Pointe Géologie: migmatites including leucosomes and melanosomes, coarse-grained pink granites, anatexites and mylonitic gneisses. For melanosomes, the magnetic foliation is dominantly in agreement with the observed field foliation, i.e. dominantly N–S sub-vertical in shear zones and gently inclined in dome structures. AMS technique reveals a sub-horizontal magnetic lineation in migmatites from shear zones and a gently plunging one in dome structures. Magnetic properties of leucosomes and of coarse-pink granitic dykes contrast with melanosomes. The bulk susceptibility and anisotropy degree are significantly lower in granitic magmas that in melanosomes. In addition, in well-defined leucosomes, granitic dykes and anatexites, the magnetic ellipsoid is characterized by a higher plunge of the magnetic lineation, which tends to be vertical. This is associated to a rheological contrast between the solid-state deformation suffered by oxide grains in the melanosomes and their reorientation in a viscous flow during the transfer of felsic melt to the granitic dykes. Magnetic structure of leucosomes, granitic dykes and anatexites highlights the role of the gravity-induced upwelling of a crust undergoing high degree of partial melting in a transpressional regime
|
Contribution of AMS measurements in understanding the migmatitic terrains of Pointe Géologie, Terre Adélie (East-Antarctica)
|
contribution of ams measurements in understanding the migmatitic terrains of pointe géologie, terre adélie (east-antarctica)
|
audiencea anisotropy susceptibility pointe géologie archipelago terre adélie east antarctica crust experienced lived anatectic paleoproterozoic ago. analyse tectonic crystalline basement built rocks melting devoid markers. rocks pointe géologie migmatites leucosomes melanosomes coarse grained pink granites anatexites mylonitic gneisses. melanosomes foliation dominantly foliation i.e. dominantly zones gently inclined dome structures. reveals lineation migmatites zones gently plunging dome structures. leucosomes coarse pink granitic dykes melanosomes. susceptibility anisotropy granitic magmas melanosomes. leucosomes granitic dykes anatexites ellipsoid plunge lineation tends vertical. rheological deformation suffered oxide grains melanosomes reorientation viscous felsic melt granitic dykes. leucosomes granitic dykes anatexites highlights upwelling crust undergoing melting transpressional
|
exact_dup
|
[
"47083645",
"49268374",
"52710956"
] |
52639719
|
10.1007/s11356-015-4835-6
|
International audienceThe spatio-temporal trend of trace metals (Cd, Co, Cr, Cu, Ni, Pb, and Zn) in a tropical urban estuary under the influence of monsoon was determined using diffusive gradient in thin films (DGT) in situ samplers. Three different climatic periods were observed: period 1, dry with dredging activity; period 2, intermediate meaning from dry to wet event; and period 3, wet having continuous rainfall. Conforming to monsoon regimes, these periods correspond to the following: transition from winter to summer, winter, and summer monsoons, respectively. The distinction of each period is defined by their specific hydrological and physico-chemical conditions. Substantial concentrations of the trace metals were detected. The distribution and trend of the trace metals under the challenge of a tropical climate were able to follow using DGT as a sensitive in situ sampler. In order to identify the differences among periods, statistical analyses were performed. This allowed discriminating period 2 (oxic water) as significantly different compared to other periods. The spatio-temporal analysis was then applied in order to distinguish the trend of the trace metals. Results showed that the trend of trace metals can be described according to their response to (i) seasonal variations (Cd and Cr), (ii) spatio-temporal conditions (Co, Cu, Ni, and Pb), and (iii) neither (i) nor (ii) meaning exhibiting no response or having constant change (Zn). The correlation of the trace metals and the physico-chemical parameters reveals that Cd, Co, Cu, and Cr are proportional to the dissolved oxygen (DO), Cd and Ni are correlated pH, and Zn lightly influenced by salinity
|
Trends of labile trace metals in tropical urban water under highly contrasted weather conditions
|
trends of labile trace metals in tropical urban water under highly contrasted weather conditions
|
audiencethe spatio trace metals tropical estuary monsoon diffusive films situ samplers. climatic dredging meaning rainfall. conforming monsoon regimes winter summer winter summer monsoons respectively. distinction hydrological physico conditions. substantial trace metals detected. trace metals challenge tropical situ sampler. performed. discriminating oxic periods. spatio distinguish trace metals. trace metals seasonal spatio neither meaning exhibiting trace metals physico reveals dissolved lightly influenced salinity
|
exact_dup
|
[
"49278525",
"52715754"
] |
52659846
|
10.1088/0004-637X/747/1/64
|
International audienceWe report on our second-year campaign of X-ray follow-up observations of unidentified Fermi-LAT \gamma-ray sources at high Galactic latitudes (|b|>10 degree) using the X-ray Imaging Spectrometer onboard the Suzaku X-ray Observatory. In this second year of the project, seven new targets were selected from the First Fermi-LAT Catalog, and studied with 20-40 ks effective Suzaku exposures. We detected an X-ray point source coincident with the position of the recently discovered millisecond pulsar PSR J2302+4442 within the 95% confidence error circle of 1FGL J2302.8+4443. The X-ray spectrum of the detected counterpart was well fit by a blackbody model with temperature of kT ~0.3 keV, consistent with an origin of the observed X-ray photons from the surface of a rotating magnetized neutron star. For four other targets which were also recently identified with a normal pulsar (1FGL J0106.7+4853) and millisecond pulsars (1FGL J1312.6+0048, J1902.0-5110, and J2043.2+1709), only upper limits in the 0.5-10 keV band were obtained at the flux levels of ~10^{-14} erg cm^{-2} s^{-1}. A weak X-ray source was found in the field of 1FGL J1739.4+8717, but its association with the variable \gamma-ray emitter could not be confirmed with the available Suzaku data alone. For the remaining Fermi-LAT object 1FGL J1743.8-7620 no X-ray source was detected within the LAT 95% error ellipse. We briefly discuss the general properties of the observed high Galactic-latitude Fermi-LAT objects by comparing their multiwavelength properties with those of known blazars and millisecond pulsars
|
Suzaku X-ray Follow-up Observations of Seven Unassociated Fermi-LAT Gamma-ray Sources at High Galactic Latitudes
|
suzaku x-ray follow-up observations of seven unassociated fermi-lat gamma-ray sources at high galactic latitudes
|
audiencewe campaign unidentified fermi gamma galactic latitudes spectrometer onboard suzaku observatory. seven targets fermi catalog suzaku exposures. coincident discovered millisecond pulsar confidence circle counterpart blackbody photons rotating magnetized neutron star. targets pulsar millisecond pulsars gamma emitter confirmed suzaku alone. fermi ellipse. briefly galactic latitude fermi multiwavelength blazars millisecond pulsars
|
exact_dup
|
[
"52710458"
] |
52660570
|
10.1093/mnras/stu160
|
International audienceComet C/2013 A1 will make a very close approach with the planet Mars on 2014 October 19. For this event, we compute the density of cometary dust particles around the Mars Express spacecraft, in order to assess the real risk for space probes. We also estimate the zenithal hourly rate (ZHR) and discuss observational opportunities for the resulting Martian meteor shower. We find, for a surface of 2.7 m 2 , that the Mars Express spacecraft will experience approximately 10 impacts from particles larger than 100 µm in size. The fluence per square metre is found to be 3.5 during the encounter. The equivalent ZHR is computed to be ZHR 4.75 × 10 9 h −1 , making this event the strongest meteor storm ever predicted. We call this event a 'meteor hurricane', which we define to be a meteor shower with ZHR exceeding 10 6 h −1
|
Meteor hurricane at Mars on 2014 October 19 from comet C/2013 A1
|
meteor hurricane at mars on 2014 october 19 from comet c/2013 a1
|
audiencecomet planet mars october cometary mars express spacecraft probes. zenithal hourly observational opportunities martian meteor shower. mars express spacecraft impacts size. fluence metre encounter. strongest meteor storm ever predicted. call meteor hurricane meteor shower exceeding
|
exact_dup
|
[
"52719331"
] |
52675015
|
10.1016/j.jms.2015.05.008
|
International audienceAminoacetonitrile (AAN) is a key compound in astrochemistry and astrobiology. We present a combined theoretical and experimental investigation concerning the single photoionization of gas-phase AAN and the fragmentation pathways of the resulting cation. At present, we measured photoelectron photoion coincidence (PEPICO) spectra in the 9.8–13.6 eV energy regime using synchrotron radiation as exciting light source. In order to interpret the VUV experimental data obtained, we explored the ground potential energy surface (PES) of AAN and of its cation using standard and explicitly correlated quantum chemical methodologies. This allowed us to deduce accurate thermochemical data for this molecule. We also determined, for the first time, the adiabatic ionization energy of AAN to lie at AIE = (10.085 ± 0.03) eV. The unimolecular decomposition pathways of the resulting AAN+ parent cation are also investigated. The appearance energies of five fragments are determined for the first time, with 30 meV accuracy. Interestingly, our work shows the possibility of the formation of both HCN and HNC isomeric forms. The implications for the evolution of prebiotic molecules under VUV irradiation are briefly discussed
|
VUV photoionization and dissociative photoionization spectroscopy of the interstellar molecule aminoacetonitrile: Theory and experiment
|
vuv photoionization and dissociative photoionization spectroscopy of the interstellar molecule aminoacetonitrile: theory and experiment
|
audienceaminoacetonitrile compound astrochemistry astrobiology. concerning photoionization fragmentation pathways cation. photoelectron photoion coincidence pepico synchrotron exciting source. interpret explored cation explicitly methodologies. deduce thermochemical molecule. adiabatic ionization unimolecular decomposition pathways parent cation investigated. appearance fragments accuracy. interestingly isomeric forms. prebiotic irradiation briefly
|
exact_dup
|
[
"47087194",
"48163000"
] |
52678351
|
10.1007/s11207-015-0655-6
|
International audienceThe equator-to-pole radius difference (Δr=R eq−R pol) is a fundamental property of our star, and understanding it will enrich future solar and stellar dynamical models. The solar oblateness (Δ⊙) corresponds to the excess ratio of the equatorial solar radius (R eq) to the polar radius (R pol), which is of great interest for those working in relativity and different areas of solar physics. Δr is known to be a rather small quantity, where a positive value of about 8 milli-arcseconds (mas) is suggested by previous measurements and predictions. The Picard space mission aimed to measure Δr with a precision better than 0.5 mas. The Solar Diameter Imager and Surface Mapper (SODISM) onboard Picard was a Ritchey–Chrétien telescope that took images of the Sun at several wavelengths. The SODISM measurements of the solar shape were obtained during special roll maneuvers of the spacecraft by 30° steps. They have produced precise determinations of the solar oblateness at 782.2 nm. After correcting measurements for optical distortion and for instrument temperature trend, we found a solar equator-to-pole radius difference at 782.2 nm of 7.9±0.3 mas (5.7±0.2 km) at one σ. This measurement has been repeated several times during the first year of the space-borne observations, and we have not observed any correlation between oblateness and total solar irradiance variations
|
On the determination and constancy of the solar oblateness
|
on the determination and constancy of the solar oblateness
|
audiencethe equator pole eq−r enrich models. oblateness excess equatorial polar great relativity physics. quantity milli arcseconds predictions. picard mission aimed precision mas. imager mapper sodism onboard picard ritchey–chrétien telescope took wavelengths. sodism roll maneuvers spacecraft steps. precise determinations oblateness correcting distortion instrument equator pole repeated borne oblateness irradiance
|
exact_dup
|
[
"52718239",
"52777248"
] |
52681251
|
10.1016/j.gmod.2013.10.005
|
International audienceIn order to reconstruct spatial curves from discrete electronic sensor data, two alternative C2 Pythagorean-hodograph (PH) quintic spline formulations are proposed, interpolating given spatial data subject to prescribed constraints on the arc length of each spline segment. The first approach is concerned with the interpolation of a sequence of points, while the second addresses the interpolation of derivatives only (without spatial localization). The special structure of PH curves allows the arc-length conditions to be expressed as algebraic constraints on the curve coefficients. The C2 PH quintic splines are thus defined through minimization of a quadratic function subject to quadratic constraints, and a close starting approximation to the desired solution is identified in order to facilitate efficient construction by iterative methods. The C2 PH spline constructions are illustrated by several computed examples
|
C2 interpolation of spatial data subject to arc-length constraints using Pythagorean-hodograph quintic splines
|
c2 interpolation of spatial data subject to arc-length constraints using pythagorean-hodograph quintic splines
|
audiencein reconstruct sensor pythagorean hodograph quintic spline formulations interpolating prescribed spline segment. concerned interpolation addresses interpolation derivatives localization algebraic coefficients. quintic splines minimization quadratic quadratic desired facilitate iterative methods. spline constructions illustrated
|
exact_dup
|
[
"51952854"
] |
52682004
|
10.1016/j.eurpolymj.2013.09.019
|
11 pagesInternational audienceThe combination of a neodymium borohydride, Nd(BH4)3(THF)3 (1) or Cp*Nd(BH4)2(THF)x (2), with MgnBuEt (BEM), affords an efficient and highly selective (up to 96.7% 1,4-trans) catalyst for butadiene polymerization. In the presence of excesses of Mg co-catalyst, polymer chain transfer takes place between neodymium and magnesium, and significant amounts of 1,2-units are observed. When considered for butadiene-styrene statistical copolymerization, the catalytic system based on 2 showed a good ability to produce poly[(1,4-trans-butadiene)-co-styrene)], with strong impact of the Mg/Nd ratio on the yield and on the copolymer microstructure, including the percentage of inserted styrene (up to 16.9 mol%). Whatever the co-monomers concentration the polybutadiene backbone remained 1,4-trans. The precise microstructure of the polymers and copolymers was thoroughly analyzed by means of high resolution NMR spectroscopy (900 MHz) and MALDI-ToF spectrometry
|
Trans-stereospecific polymerization of butadiene and random copolymerization with styrene using borohydrido neodymium/magnesium dialkyl catalysts
|
trans-stereospecific polymerization of butadiene and random copolymerization with styrene using borohydrido neodymium/magnesium dialkyl catalysts
|
pagesinternational audiencethe neodymium borohydride mgnbuet affords selective catalyst butadiene polymerization. excesses catalyst polymer neodymium magnesium amounts observed. butadiene styrene copolymerization catalytic poly butadiene styrene copolymer microstructure inserted styrene whatever monomers polybutadiene backbone remained trans. precise microstructure polymers copolymers thoroughly spectroscopy maldi spectrometry
|
exact_dup
|
[
"52876307"
] |
52683318
|
10.1063/1.1759375
|
International audienceA thorough electromagnetic study of pillar microcavities reveals a surprising behavior for their Q factors in the strong confinement limit. Q displays a fast oscillatory variation as a function of the pillar diameter, and reaches values well in excess of the quality factor of the reference planar cavity. This behavior is explained by the hybrid character of the cavity mode in the small diameter limit, which results mainly from the electromagnetic coupling of the HE11 (i.e., fundamental) and EH11 guided modes of the cavity spacer through the associated Bloch modes in the Bragg mirrors
|
Electromagnetic study of the quality factor of pillar microcavities in the small diameter limit
|
electromagnetic study of the quality factor of pillar microcavities in the small diameter limit
|
audiencea thorough electromagnetic pillar microcavities reveals surprising confinement limit. displays oscillatory pillar reaches excess planar cavity. hybrid character cavity electromagnetic i.e. guided cavity spacer bloch bragg mirrors
|
exact_dup
|
[
"51962978"
] |
52688123
|
10.1051/proc/2011018
|
CEMRACS'10 research achievements: numerical modeling of fusion. Papers from the 15th Annual Summer Research Session (Centre d'étude Mathématique de Recherche Avancée en Calcul Scientifique) held in Marseille, July 19-August 27, 2010International audienceWe build a non-dissipative second order algorithm for the approximate resolution of the one-dimensional Euler system of compressible gas dynamics with two components. The considered model was proposed in Allaire, Clerc and Kokh (2002). The algorithm is based on Kokh and Lagoutière (2010) which deals with a non-dissipative first order resolution in Lagrange-remap formalism. In the present paper we describe, in the same framework, an algorithm that is second order accurate in time and space, and that preserves sharp interfaces. Numerical results reported at the end of the paper are very encouraging, showing the interest of the second order accuracy for genuinely non-linear waves
|
A second order anti-diffusive Lagrange-remap scheme for two-component flows
|
a second order anti-diffusive lagrange-remap scheme for two-component flows
|
cemracs achievements fusion. papers summer session étude mathématique recherche avancée calcul scientifique held marseille august audiencewe build dissipative approximate euler compressible components. allaire clerc kokh kokh lagoutière deals dissipative lagrange remap formalism. preserves sharp interfaces. encouraging genuinely
|
exact_dup
|
[
"48221211",
"52196048"
] |
52710839
|
10.1016/j.atmosres.2016.02.006
|
International audienceGas and aerosol chemistry of 10 km -resolution mesoscale models Meso-NH and WRF/CHEM were evaluated on three cases over Europe. These one-day duration cases were selected from Freney et al. (2011) and occurred on contrasted meteorological conditions and at different seasons: a cyclonic circulation with a well-marked frontal zone on winter, an anti-cyclonic situation with local storm precipitations on summer and a cold front in the northwest of Europe associated to a convergence of air masses over eastern Europe and conflicting air masses over Spain and France on autumn. To assess the performance of the two models, surface hourly databases from observation stations over Europe were used, together with airborne measurements. For both models, the meteorological fields were in good agreement with the measurements for the three days. Winds presented the largest normalized mean bias integrated over all European stations for both models. Daily gas chemistry was reproduced with normalized mean biases between -14 and 11 %, a level of accuracy that is acceptable for policy support. The two models performances were degraded during night-time quite likely due to the constant primary species emissions. The PM2.5 bulk mass concentration was overestimated by Meso-NH over Europe and slightly underestimated by WRF/CHEM. The absence of wet deposition in the models partly explains the local discrepancies with the observations. More locally, the systematic low mixing ratio of volatile organic compounds in the gas phase simulated by WRF/CHEM at three stations was correlated with the underestimation of OM (Organic Matter) mass in the aerosol phase. Moreover, this mass of OM was mainly composed of anthropogenic POA (Primary Organic Aerosols) in WRF/CHEM, suggesting a missing source for SOA (Secondary Organic Aerosols) mass in WRF/CHEM aerosol parameterization. The contribution of OM was well simulated by Meso-NH, with a higher contribution for the summer case. For Meso-NH, SOA made the major contribution to the OM mass. The simulation of the mass of SO42- in particles by both models was often overestimated and correlated with an underestimation of the SO2 mixing ratio. The simulated masses of NO3- and NH4+ in particles were always higher for Meso-NH than for WRF/CHEM, which was linked to a difference in NOX mixing ratio between the models. Finally, computations of model performance criterion and model performance goals show that both models can be considered acceptable for standard modelling applications. In particular, Meso-NH model, using a gaseous chemical mechanism designed to compute the organic precursors of aerosols, shows comparable simulated amounts of SOA to observations at local sites
|
Evaluation of Meso-NH and WRF/CHEM simulated gas and aerosol chemistry over Europe based on hourly observations
|
evaluation of meso-nh and wrf/chem simulated gas and aerosol chemistry over europe based on hourly observations
|
audiencegas aerosol mesoscale meso europe. freney occurred contrasted meteorological seasons cyclonic circulation marked frontal winter cyclonic storm precipitations summer cold front northwest europe eastern europe conflicting spain autumn. hourly databases stations europe airborne measurements. meteorological days. winds stations models. reproduced biases acceptable support. performances degraded night emissions. overestimated meso europe underestimated chem. deposition partly explains discrepancies observations. locally volatile stations underestimation aerosol phase. composed anthropogenic aerosols missing aerosols aerosol parameterization. meso summer case. meso mass. overestimated underestimation ratio. meso models. computations criterion goals acceptable applications. meso gaseous precursors aerosols comparable amounts
|
exact_dup
|
[
"49268277"
] |
52716832
|
10.1063/1.3514200
|
International audienceIn the general context of the geostrophic adjustment, we study the formation of coherent structures in a rotating shallow water model on the f-plane starting from localized dipolar configurations We perform direct numerical simulations with such initial conditions with the help of a well-balanced high-resolution finite-volume numerical scheme Initializations with geostrophically balanced quasigeostrophic modons with high enough Rossby numbers lead to adjustment toward quasistationary coherent ageostrophic dipoles Like in laboratory experiments, cyclonic potential vorticity is being detrained from the dipoles and their trajectories bend Comparisons with recently found exact steady-moving localized dipolar solutions show similarities and differences at the same time Initializations with unbalanced dipolar initial conditions lead to similar quasistationary configurations at high enough effective Rossby numbers At low Rossby numbers the classical geostrophic adjustment is observed Ageostrophic quasistationary dipoles emerging from the simulations are surprisingly robust They undergo frontal collisions with an exchange of cyclonic partners, which are essentially elastic and do not change their structure They also keep coherence when encountering a steep topography and ballistically transport passive tracers (C) 2010 American Institute of Physics [doi 10 1063/1 3514200
|
(A)geostrophic adjustment of dipolar perturbations, formation of coherent structures and their properties, as follows from high-resolution numerical simulations with rotating shallow water model
|
(a)geostrophic adjustment of dipolar perturbations, formation of coherent structures and their properties, as follows from high-resolution numerical simulations with rotating shallow water model
|
audiencein geostrophic adjustment coherent rotating shallow localized dipolar configurations balanced initializations geostrophically balanced quasigeostrophic modons rossby adjustment toward quasistationary coherent ageostrophic dipoles cyclonic vorticity detrained dipoles trajectories bend comparisons steady moving localized dipolar similarities initializations unbalanced dipolar quasistationary configurations rossby rossby geostrophic adjustment ageostrophic quasistationary dipoles emerging surprisingly robust undergo frontal collisions cyclonic partners essentially elastic keep coherence encountering steep topography ballistically passive tracers
|
exact_dup
|
[
"52897852"
] |
52723122
|
10.1016/j.tecto.2013.08.005
|
International audienceAnalogue sandbox models have been set up to study the impact of synkinematic deposits on the geometry and evolution of single thrusts and folds according to different sedimentation modes (a slow or rapid sedimentation rate that is constant or changing in space and time) and rheological profiles (thin or thick sedimentary series, with or without a basal décollement level). A first series of experiments documents the influence of synkinematic deposits according to their sedimentation rate and the rheology of the prekinematic materials. A second series investigates the influence of changes in the sedimentation rate through time. A third one considers the influence of changes in the sedimentation rate in space. All these experiments suggest that the geometry and evolution of single compressive growth structures vary according to the sedimentation rate. The number and dip of their frontal thrust segments change with the ratio R between the sedimentation rate at the footwall of the faults and the uplift rate of their hanging wall. The latter is then more or less uplifted depending on the dip of the thrusts. As a result, the overall structure has either a fault-bend fold or a fault-propagation fold geometry. These rules are verified when the ratio R changes in space or through time. In addition, the rheological profile of the models also affects the geometry and evolution of compressive growth structures. Their structural style, as well as the synsedimentary splitting and steepening of the associated thrusts, varies according to the occurrence and strength of the brittle and ductile layers. According to this modelling study, the ratio R and its changes in space and time, along with the rheology of the deformed materials, are key parameters to better understand the geometrical and kinematical complexities of natural growth thrusts and folds and to improve their interpretation
|
Impact of synkinematic sedimentation on the geometry and dynamics of compressive growth structures: Insights from analogue modelling
|
impact of synkinematic sedimentation on the geometry and dynamics of compressive growth structures: insights from analogue modelling
|
audienceanalogue sandbox synkinematic deposits thrusts folds sedimentation slow sedimentation changing rheological thick sedimentary basal décollement documents synkinematic deposits sedimentation rheology prekinematic materials. investigates sedimentation time. considers sedimentation space. compressive vary sedimentation rate. frontal thrust segments sedimentation footwall faults uplift hanging wall. uplifted thrusts. fault bend fault propagation geometry. verified time. rheological affects compressive structures. style synsedimentary splitting steepening thrusts varies occurrence brittle ductile layers. rheology deformed geometrical kinematical complexities thrusts folds
|
exact_dup
|
[
"47095455",
"48196443"
] |
52737128
|
10.1002/hyp.7986
|
Soumis à Hydrological Processes, accepté définitivement ; en attente de publication.International audienceRainfall and its consequences are usually considered as the major factor trig- gering slope instabilities within clay deposits. The link between rainfall, water inltration and landslide activity may be complex and comprehensive sets of data are still necessary to understand how water inltrates in cohesive material. On unstable slopes made of ne-grained sediments, gravitational deformation generates supercial shear ruptures and tension ssures whose continuous opening could be amplied by shrinkage during dry periods. This ssure network at the surface can be very dense and strongly controls the water inltration process. However, it re- mains dicult to assess the ssure evolution at depth and its eventual relationship with shallow slip surfaces. This work presents the results of a geophysical study which aimed to characterize the ssures that are observed along the unstable clay slopes of the Trieves area (French Alps). The site was rst investigated combining geomorphological analysis, drilling, borehole logging, geotechnical tests and geo- physical experiments. This investigation evidenced the presence of at least three rupture surfaces (at 5m, 10 to 15m and 42m) with a water ow at the second one. In a second step, permanent instruments were installed (piezometers and soil water content (SWC) probes). Results indicate high water inltration velocities, down to the water table located at 2.5m depth, that are likely to be linked with sub-vertical preferential paths, such as ssures. Geophysical parameters (electrical resistivity, S-wave velocities, Rayleigh waves attenuation) were monitored. Geophysical results suggest that ssures are permanently open, that they serve as preferential inltra- tion paths, and that they can reach, at least, a depth of 2m. The methods employed in this research put forward that the system of imbricated ssures drains water from the surface down to the shallow slip surfaces at 5m and 10-5m. This work highlights the role of ssures network in water inltration in the numerous clay landslides of the Trieves area
|
Application of geophysical measurements for assessing the role of fissures in water infiltration within a clay landslide (Trièves area, French Alps)
|
application of geophysical measurements for assessing the role of fissures in water infiltration within a clay landslide (trièves area, french alps)
|
soumis hydrological accepté définitivement attente publication.international audiencerainfall consequences trig gering instabilities clay deposits. rainfall inltration landslide comprehensive inltrates cohesive material. unstable slopes grained sediments gravitational deformation generates supercial ruptures tension ssures opening amplied shrinkage periods. ssure dense inltration process. mains dicult ssure eventual shallow slip surfaces. presents geophysical aimed characterize ssures unstable clay slopes trieves french alps combining geomorphological drilling borehole logging geotechnical experiments. evidenced rupture one. permanent instruments installed piezometers probes inltration velocities preferential paths ssures. geophysical electrical resistivity velocities rayleigh attenuation monitored. geophysical ssures permanently serve preferential inltra paths imbricated ssures drains shallow slip highlights ssures inltration numerous clay landslides trieves
|
exact_dup
|
[
"47294689"
] |
52739629
|
10.1051/0004-6361/200911847
|
We use three years of data from the Supernova Legacy Survey (SNLS) to study the general properties of core-collapse and type Ia supernovae. This is the first such study using the "rolling search" technique which guarantees well-sampled SNLS light curves and good efficiency for supernovae brighter than i'~24. Using host photometric redshifts, we measure the supernova absolute magnitude distribution down to luminosities 4.5 mag fainter than normal SNIa. Using spectroscopy and light-curve fitting to discriminate against SNIa, we find a sample of 117 core-collapse supernova candidates with redshifts z < 0.4 (median redshift of 0.29) and measure their rate to be larger than the type Ia supernova rate by a factor 4.5±0.8(stat.)±0.6 (sys.). This corresponds to a core-collapse rate at z = 0.3 of [ 1.42±0.3(stat.)±0.3(sys.)] ×10-4 yr-1(h_70-1 Mpc)-3
|
The core-collapse rate from the Supernova Legacy Survey
|
the core-collapse rate from the supernova legacy survey
|
supernova legacy snls collapse supernovae. rolling guarantees sampled snls supernovae brighter photometric redshifts supernova luminosities fainter snia. spectroscopy fitting discriminate snia collapse supernova candidates redshifts supernova stat. sys. collapse stat. sys.
|
exact_dup
|
[
"46770668",
"52456924",
"152091190",
"52662971",
"52695220"
] |
52765241
|
10.1007/s00531-006-0127-1
|
International audienceIn New Caledonia, the occurrence of one of the World's largest and best-exposed subduction/ obduction complex is a key point for the understanding of the geodynamic evolution of the whole Southwest Pacific region. Within the ophiolite, pre-and postobduction granitoids intrude the ultramafic allochthon and provide new time constraints for the understanding of obduction processes. At 27.4 Ma, a new East-dipping subduction generated the active margin magmatism along the western coast of the island (Saint-Louis massif). At 24.3 Ma, the eastward shift of the magma activity and slightly different geochemical features (Koum-Borindi massif) was either related to the older slab break-off; or alternatively, due to the eastward migration of the mantle wedge following the collision of the eastern margin of the Low Howe rise. Finally, the occurrence of a granulite-facies xenolith in the Koum-Borindi massif with comparable 24.5 Ma U–Pb zircon age and isotopic features (initial eNd = 5.1) suggests that these evolved magmas were generated within the lithospheric mantle beneath a continental crust of normal thickness. Geochronological evidence for continuous convergence during the Oligocene infers an East-dipping Eocene-Oligocene subduction/obduction system to have existed in the Southwest Pacific from the d'Entrecasteaux zone to the North Island of New Zealand
|
U–Pb zircon dating of post-obduction volcanic-arc granitoids and a granulite-facies xenolith from New Caledonia. Inference on Southwest Pacific geodynamic models.
|
u–pb zircon dating of post-obduction volcanic-arc granitoids and a granulite-facies xenolith from new caledonia. inference on southwest pacific geodynamic models.
|
audiencein caledonia occurrence exposed subduction obduction geodynamic southwest pacific region. ophiolite postobduction granitoids intrude ultramafic allochthon obduction processes. east dipping subduction margin magmatism coast island saint louis massif eastward magma geochemical koum borindi massif older slab break alternatively eastward migration mantle wedge collision eastern margin howe rise. occurrence granulite facies xenolith koum borindi massif comparable u–pb zircon isotopic evolved magmas lithospheric mantle beneath continental crust thickness. geochronological oligocene infers east dipping eocene oligocene subduction obduction existed southwest pacific entrecasteaux island zealand
|
exact_dup
|
[
"49302999",
"52658967"
] |
52791003
|
10.1007/11893318_34
|
International audienceMicroarray technology produces vast amounts of data by measuring simultaneously the expression levels of thousands of genes under hundreds of biological conditions. Nowadays, one of the principal challenges in bioinformatics is the interpretation of huge data using different sources of information. We propose a novel data analysis method named CGGA (Co-expressed Gene Groups Analysis) that automatically finds groups of genes that are functionally enriched, i.e. have the same functional annotations, and are co- expressed. CGGA automatically integrates the information of microarrays, i.e. gene expression profiles, with the functional annotations of the genes obtained by the genome-wide information sources such as Gene Ontology (GO)1. By applying CGGA to well-known microarray experiments, we have identified the principal functionally enriched and co-expressed gene groups, and we have shown that this approach enhances and accelerates the interpretation of DNA microarray experiments
|
Interpreting microarray experiments via co-expressed gene groups analysis
|
interpreting microarray experiments via co-expressed gene groups analysis
|
audiencemicroarray produces vast amounts measuring simultaneously thousands hundreds conditions. nowadays principal challenges bioinformatics huge information. propose named cgga automatically finds functionally enriched i.e. annotations expressed. cgga automatically integrates microarrays i.e. annotations ontology cgga microarray principal functionally enriched enhances accelerates microarray
|
exact_dup
|
[
"48354655"
] |
52791562
|
10.1051/cocv/2011004
|
International audienceIn this paper, we consider the back and forth nudging algorithm that has been introduced for data assimilation purposes. It consists of iteratively and alternately solving forward and backward in time the model equation, with a feedback term to the observations. We consider the case of 1-dimensional transport equations, either viscous or inviscid, linear or not (Bürgers' equation). Our aim is to prove some theoretical results on the convergence, and convergence properties, of this algorithm. We show that for non viscous equations (both linear transport and Burgers), the convergence of the algorithm holds under observability conditions. Convergence can also be proven for viscous linear transport equations under some strong hypothesis, but not for viscous Burgers' equation. Moreover, the convergence rate is always exponential in time. We also notice that the forward and backward system of equations is well posed when no nudging term is considered
|
The Back and Forth Nudging algorithm for data assimilation problems: theoretical results on transport equations
|
the back and forth nudging algorithm for data assimilation problems: theoretical results on transport equations
|
audiencein forth nudging assimilation purposes. iteratively alternately solving backward observations. viscous inviscid bürgers algorithm. viscous burgers observability conditions. proven viscous viscous burgers equation. exponential time. notice backward posed nudging
|
exact_dup
|
[
"50543629"
] |
52848412
|
10.1016/j.ecolmodel.2009.06.027
|
International audienceModelling gene flow across natural landscapes is a current challenge of population genetics. Models are essential to make clear predictions about conditions that cause genetic differentiation or maintain connectivity between populations. River networks are a special case of landscape matrix. They represent stretches of habitat connected according to a branching pattern where dispersal is usually limited to upstream or downstream movements. Because of their peculiar topology, and the increasing concern about conservation issues in hydrosystems, there has been a recent revival of interest in modelling dispersal in river networks. Network complexity has been shown to influence global population differentiation. However, geometric characteristics are likely to interact with the way individuals move across space. Studies have focused on in-stream movements. None of the work published so far took into consideration the ability of many species to disperse overland between branches of the same network though. We predicted that the relative contribution of these two dispersal modalities (in-stream and overland) would affect the overall genetic structure. We simulated dispersal in synthetic river networks using an individual-based model.We tested the effect of dispersal modalities, i.e. the ratio of overland/in-stream dispersal, and two geometric parameters, bifurcation angle between branches and network complexity. Data revealed that if geometrical parameters affected population differentiation, dispersal parameters had the strongest effect. Interestingly, we observed a quadratic relationship between p the proportion of overland dispersers and population differentiation. We interpret this U-shape pattern as a balance between isolation by distance caused by in-stream movements at low values of p and intense migrant exchanges within the same branching unit at high values of p. Our study is the first attempt to model out-of-networkmovements. It clearly shows that both geometric and dispersal parameters interact. Both should be taken into consideration in order to refine predictions about dispersal and gene flow in river network
|
Modelling the effect of in-stream and overland dispersal on gene flow in river networks
|
modelling the effect of in-stream and overland dispersal on gene flow in river networks
|
audiencemodelling landscapes challenge genetics. maintain connectivity populations. river landscape matrix. stretches habitat branching dispersal upstream downstream movements. peculiar topology concern conservation hydrosystems revival dispersal river networks. differentiation. geometric interact move space. focused stream movements. none took consideration disperse overland branches though. dispersal modalities stream overland structure. dispersal synthetic river model.we dispersal modalities i.e. overland stream dispersal geometric bifurcation branches complexity. geometrical dispersal strongest effect. interestingly quadratic proportion overland dispersers differentiation. interpret balance isolation stream movements intense migrant exchanges branching attempt networkmovements. geometric dispersal interact. consideration refine dispersal river
|
exact_dup
|
[
"53008054"
] |
52898202
|
10.1029/2011GL050343.
|
International audienceMany independent measurements have shown that extremely cold temperatures are found in the Martian mesosphere. These mesospheric "cold pockets" may result from the propagation of atmospheric waves. Recent observational achievements also hint at such cold pockets by revealing mesospheric clouds formed through the condensation of CO2, the major component of the Martian atmosphere. Thus far, modeling studies addressing the presence of cold pockets in the Martian mesosphere have explored the influence of large-scale circulations. Mesoscale phenomena, such as gravity waves, have received less attention. Here we show through multiscale meteorological modeling that mesoscale gravity waves could play a key role in the formation of mesospheric cold pockets propitious to CO2 condensation. Citation: Spiga, A., F. Gonzalez-Galindo, M.-A. Lopez-Valverde, and F. Forget (2012), Gravity waves, cold pockets and CO2 clouds in the Martian mesosphere, Geophys. Res. Lett., 39, L02201, doi:10.1029/2011GL050343
|
Gravity waves, cold pockets and CO2 clouds in the Martian mesosphere
|
gravity waves, cold pockets and co2 clouds in the martian mesosphere
|
audiencemany extremely cold martian mesosphere. mesospheric cold pockets propagation waves. observational achievements hint cold pockets revealing mesospheric clouds condensation martian atmosphere. addressing cold pockets martian mesosphere explored circulations. mesoscale phenomena attention. multiscale meteorological mesoscale mesospheric cold pockets propitious condensation. citation spiga gonzalez galindo lopez valverde forget cold pockets clouds martian mesosphere geophys. res. lett.
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exact_dup
|
[
"52718134"
] |
52922965
|
10.1002/asi.21697
|
Cataloged from PDF version of article.Multisource web news portals provide various advantages such as richness in news content and an opportunity to follow developments from different perspectives. However, in such environments, news variety and quantity can have an overwhelming effect. New-event detection and topic-tracking studies address this problem. They examine news streams and organize stories according to their events; however, several tracking stories of an event/topic may contain no new information (i.e., no novelty). We study the novelty detection (ND) problem on the tracking news of a particular topic. For this purpose, we build a Turkish ND test collection called BilNov-2005 and propose the usage of three ND methods: a cosine-similarity (CS)-based method, a language-model (LM)-based method, and a cover-coefficient (CC)-based method. For the LM-based ND method, we show that a simpler smoothing approach, Dirichlet smoothing, can have similar performance to a more complex smoothing approach, Shrinkage smoothing. We introduce a baseline that shows the performance of a system with random novelty decisions. In addition, a category-based threshold learning method is used for the first time in ND literature. The experimental results show that the LM-based ND method significantly outperforms the CS- and CC-based methods, and category-based threshold learning achieves promising results when compared to general threshold learning
|
Novelty detection for topic tracking
|
novelty detection for topic tracking
|
cataloged article.multisource news portals advantages richness news opportunity developments perspectives. environments news quantity overwhelming effect. topic tracking problem. examine news streams organize stories tracking stories topic i.e. novelty novelty tracking news topic. build turkish bilnov propose usage cosine similarity cover method. simpler smoothing dirichlet smoothing smoothing shrinkage smoothing. novelty decisions. literature. outperforms achieves promising
|
exact_dup
|
[
"52924167"
] |
52996148
|
10.1007/978-3-319-18467-8_15
|
Part 2: Web SecurityInternational audienceSecurity is a critical concern for any information system. Security properties such as confidentiality, integrity and availability need to be enforced in order to make systems safe. In complex environments, where information systems are composed of a number of heterogeneous subsystems, each must participate in their achievement. Therefore, security integration mechanisms are needed in order to 1) achieve the global security goal and 2) facilitate the analysis of the security status of the whole system. For the specific case of access-control, access-control policies may be found in several components (databases, networks and applications) all, supposedly, working together in order to meet the high level security property. In this work we propose an integration mechanism for access-control policies to enable the analysis of the system security. We rely on model-driven technologies and the XACML standard to achieve this goal
|
Model-Driven Integration and Analysis of Access-control Policies in Multi-layer Information Systems
|
model-driven integration and analysis of access-control policies in multi-layer information systems
|
securityinternational audiencesecurity concern system. security confidentiality integrity availability enforced safe. environments composed heterogeneous subsystems participate achievement. security security goal facilitate security system. policies databases supposedly meet security property. propose policies enable security. rely technologies xacml goal
|
exact_dup
|
[
"50614999",
"52839940"
] |
54025472
|
10.1016/j.tecto.2010.11.004
|
International audienceIn the southern Chinese Tianshan, the southernmost part of the Central Asian Orogenic Belt (CAOB), widespread ophiolitic mélanges form distinct tectonic units that are crucial for understanding the formation of the CAOB. However, the timing of tectonic events and subduction polarity are still in controversy. In order to better understand these geological problems, a comprehensive study was conducted on the Heiyingshan ophiolitic mélange in the SW Chinese Tianshan. Detailed structural analysis reveals that the ophiolitic mélange is tectonically underlain by sheared and weakly metamorphosed pre-Middle Devonian rocks, and unconformably overlain by non-metamorphic and undeformed lower Carboniferous (Serpukhovian) to Permian strata. The igneous assemblage of the mélange comprises OIB-like alkali basalt and andesite, N-MORB-like tholeiitic basalt, sheeted diabase dikes, cumulate gabbro and peridotite. Mafic rocks display supra-subduction signatures, and some bear evidence of contamination with the continental crust, suggesting a continental marginal (back-arc) basin setting. Zircons of a gabbro were dated at 392 ± 5 Ma by the U-Pb LA-ICP-MS method. Famennian-Visean radiolarian microfossils were found in the siliceous matrix of the ophiolitic mélange. Mylonitic phyllite which displays northward-directed kinematic evidence yielded muscovite 40Ar/39Ar plateau ages of 359 ± 2 Ma and 356 ± 2 Ma. These new data, combined with previously published results, suggest that the mafic protoliths originally formed in a back-arc basin in the Chinese southern Tianshan during the late Silurian to Middle Devonian and were subsequently incorporated into the ophiolitic mélange and thrust northward during the Late Devonian to early Carboniferous. Opening of the back-arc basin was probably induced by south-dipping subduction of the Paleo-Tianshan Ocean in the early Paleozoic, and the Central Tianshan block was rifted away from the Tarim block. Closure of the back-arc basin in the early Carboniferous formed the South Tianshan Suture Zone and re-amalgamated the two blocks
|
Paleozoic tectonics of the southern Chinese Tianshan: Insights from structural, chronological and geochemical studies of the Heiyingshan ophiolitic mélange (NW China)
|
paleozoic tectonics of the southern chinese tianshan: insights from structural, chronological and geochemical studies of the heiyingshan ophiolitic mélange (nw china)
|
audiencein southern chinese tianshan southernmost asian orogenic belt caob widespread ophiolitic mélanges tectonic crucial caob. timing tectonic subduction polarity controversy. geological comprehensive heiyingshan ophiolitic mélange chinese tianshan. reveals ophiolitic mélange tectonically underlain sheared weakly metamorphosed devonian rocks unconformably overlain metamorphic undeformed carboniferous serpukhovian permian strata. igneous assemblage mélange comprises alkali basalt andesite morb tholeiitic basalt sheeted diabase dikes cumulate gabbro peridotite. mafic rocks display supra subduction signatures bear contamination continental crust continental marginal basin setting. zircons gabbro dated method. famennian visean radiolarian microfossils siliceous ophiolitic mélange. mylonitic phyllite displays northward directed kinematic yielded muscovite plateau ages mafic protoliths originally basin chinese southern tianshan silurian devonian subsequently incorporated ophiolitic mélange thrust northward devonian carboniferous. opening basin probably dipping subduction paleo tianshan ocean paleozoic tianshan rifted away tarim block. closure basin carboniferous tianshan suture amalgamated blocks
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exact_dup
|
[
"52736773"
] |
54039570
|
10.1093/imanum/drr046
|
This is a largely extended version with respect to version 1.International audienceThis work is intended to provide a convenient tool for the mathematical analysis of a particular kind of finite volume approximation which can be used, for instance, in the context of nonlinear and/or anisotropic diffusion operators in 3D. Following the approach developed by F. Hermeline and by K.~Domelevo and P. Omnès in 2D, we consider a ``double'' covering $\Tau$ of a three-dimensional domain by a rather general primal mesh and by a well-chosen ``dual'' mesh. The associated discrete divergence operator $\div^{\ptTau}$ is obtained by the standard finite volume approach. A simple and consistent discrete gradient operator $\grad^\ptTau$ is defined by local affine interpolation that takes into account the geometry of the double mesh. Under mild geometrical constraints on the choice of the dual volumes, we show that $-\div^{\ptTau}$, $\grad^\ptTau$ are linked by the ``discrete duality property'', which is an analogue of the integration-by-parts formula. The primal mesh need not be conformal, and its interfaces can be general polygons. We give several numerical examples for anisotropic linear diffusion problems; good convergence properties are observed. The sequel [3] of this paper will summarize some key discrete functional analysis tools for DDFV schemes and give applications to proving convergence of DDFV schemes for several nonlinear degenerate parabolic PDEs
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On 3D DDFV discretization of gradient and divergence operators. I. Meshing, operators and discrete duality.
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on 3d ddfv discretization of gradient and divergence operators. i. meshing, operators and discrete duality.
|
largely .international audiencethis intended convenient mathematical kind anisotropic hermeline domelevo omnès covering primal mesh mesh. divergence pttau approach. grad pttau affine interpolation mesh. mild geometrical volumes pttau grad pttau duality analogue formula. primal mesh conformal interfaces polygons. anisotropic observed. sequel summarize ddfv schemes proving ddfv schemes degenerate parabolic pdes
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exact_dup
|
[
"52451752",
"52785724"
] |
59036041
|
10.1016/j.jmatprotec.2006.11.212
|
A fuzzy model for predicting the shapes of rectangular bars with variable curvatures along their lengths in the extrusion system with rotary dies, whose mechanism has been developed by the authors, is proposed. In the fuzzy model, the height of the die aperture, the inclination angle of the die, the angular velocity of the rotary die and the distance between the predicted and the experimental central lines of the extruded bars, namely the error of the prediction, are used as the antecedent parameters, and furthermore a linear relation is assumed among the parameters and the curvature of the extruded bar. The shapes of the bars predicted by the proposed fuzzy model are compared with those obtained in the extrusion tests in order to evaluate the accuracy of the prediction. The distance between the predicted and the experimental central lines is confirmed to be less than 4.0 % of the height of the extruded bar for all of the experimental conditions
|
Prediction of Curvatures of Parts Extruded through Rotary Die
|
prediction of curvatures of parts extruded through rotary die
|
fuzzy predicting shapes rectangular curvatures lengths extrusion rotary dies proposed. fuzzy aperture inclination rotary extruded antecedent curvature extruded bar. shapes fuzzy extrusion prediction. confirmed extruded
|
exact_dup
|
[
"61348712"
] |
78374453
|
10.1007/s11229-015-0954-3
|
Several authors have claimed that prediction is essentially impossible in the general theory of relativity, the case being particularly strong, it is said, when one fully considers the epistemic predicament of the observer. Each of these claims rests on the support of an underdetermination argument and a particular interpretation of the concept of prediction. I argue that these underdetermination arguments fail and depend on an implausible explication of prediction in the theory. The technical results adduced in these arguments can be related to certain epistemic issues, but can only be misleadingly or mistakenly characterized as related to prediction
|
Prediction in General Relativity
|
prediction in general relativity
|
claimed essentially impossible relativity said considers epistemic predicament observer. claims rests underdetermination argument prediction. argue underdetermination arguments fail implausible explication theory. adduced arguments epistemic misleadingly mistakenly
|
exact_dup
|
[
"157867421"
] |
80767906
|
10.1016/j.jinorgbio.2013.05.019
|
Abstract Speciation of the complexes of zinc(II) with a dodecapeptide (Ac-SCPGDQGSDCSI-NH2), inspired by the metal binding domain of MerR metalloregulatory proteins, have been studied by pH-potentiometric titrations, UV, SRCD (synchrotron radiation circular dichroism) and 1H NMR experiments. (MerR is a family of transcriptional regulators the archetype of which is the Hg2 +-responsive transcriptional repressor-activator MerR protein.) The aim of the ligand-design was to retain the advantageous metal binding features of MerR proteins in a model peptide for the efficient capture of toxic metal ions. The peptide binds zinc(II) via two deprotonated Cys-thiol groups and one of the Asp-carboxylates in the ZnL parent complex, possessing a remarkably high stability (logK = 9.93). In spite of the relatively long peptide loop, bis-complexes are also formed with the metal ion under basic conditions. In a competition with cadmium(II) or mercury(II), zinc(II) cannot prevent the binding of toxic metal ions by the thiolate donor groups of the ligand. Around neutral pH one equivalent of mercury(II) was shown to fully replace zinc(II) from the ZnL species. Partial replacement of zinc(II) from the peptide by one equivalent of cadmium(II), relative to zinc(II) and the ligand, is also presumable, nevertheless, spectroscopic data may suggest the formation of mixed metal ion complexes, as well. Based on the obtained results the investigated dodecapeptide can be a promising candidate for capturing toxic metal ions in practical applications
|
Competition of zinc(II) with cadmium(II) or mercury(II) in binding to a 12-mer peptide
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competition of zinc(ii) with cadmium(ii) or mercury(ii) in binding to a 12-mer peptide
|
speciation complexes zinc dodecapeptide scpgdqgsdcsi inspired merr metalloregulatory potentiometric titrations srcd synchrotron circular dichroism experiments. merr transcriptional regulators archetype responsive transcriptional repressor activator merr protein. ligand retain advantageous merr capture toxic ions. binds zinc deprotonated thiol carboxylates parent possessing remarkably logk spite complexes conditions. competition cadmium mercury zinc prevent toxic thiolate donor ligand. neutral mercury replace zinc species. replacement zinc cadmium zinc ligand presumable nevertheless spectroscopic complexes well. dodecapeptide promising candidate capturing toxic practical
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exact_dup
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[
"42926861"
] |
82508060
|
10.1016/j.jacc.2014.03.011
|
Early career academic cardiologists currently face unprecedented challenges that threaten a highly valued career path. A team consisting of early career professionals and senior leadership members of American College of Cardiology completed this white paper to inform the cardiovascular medicine profession regarding the plight of early career cardiologists and to suggest possible solutions. This paper includes: 1) definition of categories of early career academic cardiologists; 2) general challenges to all categories and specific challenges to each category; 3) obstacles as identified by a survey of current early career members of the American College of Cardiology; 4) major reasons for the failure of physician-scientists to receive funding from National Institute of Health/National Heart Lung and Blood Institute career development grants; 5) potential solutions; and 6) a call to action with specific recommendations
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Challenges Facing Early Career Academic Cardiologists
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challenges facing early career academic cardiologists
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career academic cardiologists unprecedented challenges threaten valued career path. team consisting career professionals senior leadership college cardiology completed inform cardiovascular profession plight career cardiologists solutions. categories career academic cardiologists challenges categories challenges obstacles career college cardiology reasons physician scientists receive funding career grants call recommendations
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exact_dup
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[
"43348726"
] |
95353685
|
10.1007/s00220-017-2935-5
|
In this paper, we construct a Lax pair for the classical hyperbolic van Diejen system with two independent coupling parameters. Built upon this construction, we show that the dynamics can be solved by a projection method, which in turn allows us to initiate the study of the scattering properties. As a consequence, we prove the equivalence between the first integrals provided by the eigenvalues of the Lax matrix and the family of van Diejen's commuting Hamiltonians. Also, at the end of the paper, we propose a candidate for the Lax matrix of the hyperbolic van Diejen system with three independent coupling constants
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Lax representation of the hyperbolic van Diejen dynamics with two coupling parameters
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lax representation of the hyperbolic van diejen dynamics with two coupling parameters
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hyperbolic diejen parameters. built solved projection initiate properties. equivalence integrals eigenvalues diejen commuting hamiltonians. propose candidate hyperbolic diejen
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exact_dup
|
[
"42693885"
] |
98115459
|
10.1080/20013078.2017.1321455
|
Bioinformatics tools are imperative for the in depth analysis of heterogeneous high-throughput data. Most of the software tools are developed by specific laboratories or groups or companies wherein they are designed to perform the required analysis for the group. However, such software tools may fail to capture "what the community needs in a tool". Here, we describe a novel community-driven approach to build a comprehensive functional enrichment analysis tool. Using the existing FunRich tool as a template, we invited researchers to request additional features and/or changes. Remarkably, with the enthusiastic participation of the community, we were able to implement 90% of the requested features. FunRich enables plugin for extracellular vesicles wherein users can download and analyse data from Vesiclepedia database. By involving researchers early through community needs software development, we believe that comprehensive analysis tools can be developed in various scientific disciplines
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A novel community driven software for functional enrichment analysis of extracellular vesicles data
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a novel community driven software for functional enrichment analysis of extracellular vesicles data
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bioinformatics imperative heterogeneous throughput data. laboratories companies wherein group. fail capture build comprehensive enrichment tool. funrich template invited researchers request changes. remarkably enthusiastic participation implement requested features. funrich enables plugin extracellular vesicles wherein download analyse vesiclepedia database. involving researchers believe comprehensive disciplines
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exact_dup
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[
"91195914"
] |
11309313
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10.1016/j.ijimpeng.2006.11.007
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Dynamic lateral crushing of mild steel (DIN 2393) nested tube systems was conducted using a ZWICK ROELL impact tester. The tests were performed with impact velocities ranging between 3 and 5 m/s, achieved using a fixed mass impinging onto the specimens under the influence of gravity. The various nested tube systems consisted of one standard and one optimised design. Their crushing behaviour and energy absorption capabilities were obtained and analysed. \ud
In addition to the experimental work, numerical simulations using the explicit code LS-DYNA were conducted; boundary conditions matching those observed in experiments were applied to the models. Results from the numerical method were compared against those obtained from experiments. An over-prediction in force-deflection responses was obtained from the numerical code. An attempt was made to explain this inconsistency on the basis of the formation of plastic hinges and the validity of strain rate parameters used in the Cowper Symonds relation. It was found that the optimised energy absorbers exhibited a more desirable force-deflection response than their standard counterparts due to a simple design modification which was incorporated in the optimised design
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Optimised design of nested oblong tube energy absorbers under lateral impact loading
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optimised design of nested oblong tube energy absorbers under lateral impact loading
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lateral crushing mild steel nested tube zwick roell tester. velocities ranging impinging specimens gravity. nested tube consisted optimised design. crushing capabilities analysed. dyna matching models. experiments. deflection code. attempt inconsistency plastic hinges validity cowper symonds relation. optimised absorbers exhibited desirable deflection counterparts modification incorporated optimised
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exact_dup
|
[
"147598787"
] |
11873893
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10.1016/0045-7949(84)90060-9
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Near the fixed end boundaries of cantilever swept plates, a high stress variation, especially in a near13; singular fashion at the re-entrant corner, requires that at least at this region, one requires an analysis with a high13; precision triangular plate bending element. An idealisation of an entire swept plate, especially one of large aspect13; ratio, by high precision elements may be uneconomical and the approximation of regions away from the boundary13; by a suitable beam element will achieve a considerable reduction in problem size. Thus one can achieve a structural13; reduction of the swept plate problem by the use of plate elements in regions of high stress variation, beam elements13; in regions away from the kinematically constrained boundaries and a variationally condensed transition plate/beam13; element which will have the nodes and degrees of freedom of high precision CI continuous plate elements along13; one boundary and the node and degrees of freedom of a beam element along the other boundary. This interphase13; element will provide the required transition from thin plate to thin beam behaviour. In this paper, extensive results13; indicate a considerable reduction in nroblem size and solution time without significant loss of accuracy in stresses.13; displacements and slopes
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Analysis of swept plates with structural reduction using transition element concept
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analysis of swept plates with structural reduction using transition element concept
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boundaries cantilever swept plates singular fashion entrant corner precision triangular plate bending element. idealisation swept plate aspect precision uneconomical away considerable size. swept plate plate away kinematically constrained boundaries variationally condensed plate freedom precision plate freedom boundary. interphase plate behaviour. extensive considerable nroblem stresses. displacements slopes
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exact_dup
|
[
"151637183"
] |
11995849
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10.1002/nag.956
|
This paper presents a numerical procedure for bond between indented wires and concrete, and the coupled splitting process of the surrounding concrete. The bond model is an interface, non-associative, plasticity model. It is coupled with a cohesive fracture model for concrete to take into account the splitting of such concrete. Bond between steel and concrete is fundamental for the transmission of stresses between both materials in precast prestressed concrete. Indented wires are used to improve the bond in these structural elements. The radial component of the prestressing force, increased by Poisson's effect, may split the surrounding concrete, decreasing the wire confinement and diminishing the bonding. The combined action of the bond and the splitting is studied with the proposed model. The results of the numerical model are compared with the results of a series of tests, such as those which showed splitting induced by the bond between wire and concrete. Tests with different steel indentation depths were performed. The numerical procedure accurately reproduces the experimental records and improves knowledge of this complex proces
|
Cohesive-frictional model for bond and splitting action of prestressing wire
|
cohesive-frictional model for bond and splitting action of prestressing wire
|
presents bond indented wires concrete splitting surrounding concrete. bond associative plasticity model. cohesive fracture concrete splitting concrete. bond steel concrete stresses precast prestressed concrete. indented wires bond elements. prestressing poisson split surrounding concrete decreasing wire confinement diminishing bonding. bond splitting model. splitting bond wire concrete. steel indentation depths performed. accurately reproduces records improves proces
|
exact_dup
|
[
"148657250"
] |
12002029
|
10.1016/j.eswa.2012.02.143
|
Objective: This research is focused in the creation and validation of a solution to the inverse kinematics problem for a 6 degrees of freedom human upper limb. This system is intended to work within a realtime dysfunctional motion prediction system that allows anticipatory actuation in physical Neurorehabilitation under the assisted-as-needed paradigm. For this purpose, a multilayer perceptron-based and an ANFIS-based solution to the inverse kinematics problem are evaluated. Materials and methods: Both the multilayer perceptron-based and the ANFIS-based inverse kinematics methods have been trained with three-dimensional Cartesian positions corresponding to the end-effector of healthy human upper limbs that execute two different activities of the daily life: "serving water from a jar" and "picking up a bottle". Validation of the proposed methodologies has been performed by a 10 fold cross-validation procedure. Results: Once trained, the systems are able to map 3D positions of the end-effector to the corresponding healthy biomechanical configurations. A high mean correlation coefficient and a low root mean squared error have been found for both the multilayer perceptron and ANFIS-based methods. Conclusions: The obtained results indicate that both systems effectively solve the inverse kinematics problem, but, due to its low computational load, crucial in real-time applications, along with its high performance, a multilayer perceptron-based solution, consisting in 3 input neurons, 1 hidden layer with 3 neurons and 6 output neurons has been considered the most appropriated for the target application
|
Inverse kinematics of a 6 DoF human upper limb using ANFIS and ANN for anticipatory actuation in ADL-based physical Neurorehabilitation
|
inverse kinematics of a 6 dof human upper limb using anfis and ann for anticipatory actuation in adl-based physical neurorehabilitation
|
focused creation validation kinematics freedom limb. intended realtime dysfunctional anticipatory actuation neurorehabilitation assisted paradigm. multilayer perceptron anfis kinematics evaluated. multilayer perceptron anfis kinematics trained cartesian effector healthy limbs execute serving picking bottle validation methodologies validation procedure. trained effector healthy biomechanical configurations. squared multilayer perceptron anfis methods. effectively solve kinematics crucial multilayer perceptron consisting hidden appropriated
|
exact_dup
|
[
"148663517"
] |
12002306
|
10.1016/j.eswa.2012.01.133
|
Expert systems are built from knowledge traditionally elicited from the human expert. It is precisely knowledge elicitation from the expert that is the bottleneck in expert system construction. On the other hand, a data mining system, which automatically extracts knowledge, needs expert guidance on the successive decisions to be made in each of the system phases. In this context, expert knowledge and data mining discovered knowledge can cooperate, maximizing their individual capabilities: data mining discovered knowledge can be used as a complementary source of knowledge for the expert system, whereas expert knowledge can be used to guide the data mining process. This article summarizes different examples of systems where there is cooperation between expert knowledge and data mining discovered knowledge and reports our experience of such cooperation gathered from a medical diagnosis project called Intelligent Interpretation of Isokinetics Data, which we developed. From that experience, a series of lessons were learned throughout project development. Some of these lessons are generally applicable and others pertain exclusively to certain project types
|
Cooperation between expert knowledge and data mining discovered knowledge: Lessons learned
|
cooperation between expert knowledge and data mining discovered knowledge: lessons learned
|
expert built traditionally elicited expert. precisely elicitation expert bottleneck expert construction. mining automatically extracts expert guidance successive decisions phases. expert mining discovered cooperate maximizing capabilities mining discovered complementary expert expert guide mining process. summarizes cooperation expert mining discovered cooperation gathered intelligent isokinetics developed. lessons learned development. lessons applicable pertain exclusively
|
exact_dup
|
[
"148663933"
] |
12013538
|
10.1016/j.jbankfin.2014.01.014
|
We trace the relationship between firm performance and corporate governance in microfinance institutions (MFI) utilising a self constructed global data set on MFIs, collected from third-party rating agencies. We study the effect of board characteristics, ownership type, competition and regulation on the MFI's outreach to poor clients and its financial performance. The results show that split roles of CEO and chairman, a female CEO, and competition are important explanations. Larger board size decreases the average loan size while individual guaranteed loan increases it. No difference between nonprofit organisations and shareholder firms in financial performance and outreach is found.
|
Performance and corporate governance in microfinance institutions
|
performance and corporate governance in microfinance institutions
|
trace firm corporate governance microfinance institutions utilising mfis party rating agencies. board ownership competition outreach clients performance. split roles chairman competition explanations. board loan guaranteed loan nonprofit organisations shareholder firms outreach found.
|
exact_dup
|
[
"12013537"
] |
12020644
|
10.1016/j.jbusres.2010.08.005
|
Using the index method, we developed the PollyBio model to predict election outcomes. The model, based on 49 cues about candidates’ biographies, was used to predict the outcome of the 28 U.S. presidential elections from 1900 to 2008. In using a simple heuristic, it correctly predicted the winner for 25 of the 28 elections and was wrong three times. In predicting the two-party vote shares for the last four elections from 1996 to 2008, the model’s out-of-sample forecasts yielded a lower forecasting error than 12 benchmark models. By relying on different information and including more variables than traditional models, PollyBio improves on the accuracy of election forecasting. It is particularly helpful for forecasting open-seat elections. In addition, it can help parties to select the candidates running for office.
|
Predicting Elections from Biographical Information about Candidates
|
predicting elections from biographical information about candidates
|
pollybio predict election outcomes. cues candidates’ biographies predict u.s. presidential elections heuristic correctly winner elections wrong times. predicting party vote shares elections model’s forecasts yielded forecasting benchmark models. relying traditional pollybio improves election forecasting. helpful forecasting seat elections. parties select candidates running office.
|
exact_dup
|
[
"12020755",
"12021300"
] |
132345501
|
10.1016/j.supflu.2015.07.021
|
Producción CientíficaIonic liquids of the alkylmethylimidazolium chloride family are able to solubilize high amount of cellulose and other natural polymers and have very good characteristics for their processing. Nevertheless, they present important disadvantages related to their high melting points and viscosities. Dissolution of carbon dioxide (CO2) can reduce the melting point of these ionic liquids as well as other ones presenting the same problems. In this work, the effect of pressurized carbon dioxide on the melting point depression of some ionic liquids able to dissolve biopolymers was experimentally determined using the first melting point method. Five different ionic liquids were studied in contact with CO2 using a high-pressure visual cell, up to a pressure of 10 MPa. The ILs studied were four ionic liquids with chloride anion coupled with the cations: 1-butyl-3-methylimidazolium, [C4mim]+, 1-ethyl-3-methylimidazolium, [C2mim]+, 1-allyl-3-methylimidazolium, [Amim]+ and 1-(2-hydroxyethyl)-3-methylimidazolium, [C2OHmim]+ and one ammonium-based cation choline [C5H14NO]+ combined with dihydrogen phosphate anion, [H2PO4]−. Melting point depression effect observed for these groups of ionic liquids were around 10 K for chloride ILs and went as high as 33.2 K for choline dihydrogen phosphate. To correlate the melting point depression of imidazolium chloride ILs, parameters for the Group Contribution Equation of State (GC-EoS) of Skjold-Jørgensen for the liquid phase plus a fugacity expression for solid phases was employed. Experimental data used for the parameterization includes literature data of binary vapor–liquid, liquid–liquid and solid–liquid equilibria, and activity coefficients at infinite dilution. Melting point depression was calculated with an average deviation of 1.7 K (0.5%) and a maximum deviation of 4.3 K (1.3%).Junta de Castilla y León VA295U14Marie Curie Program. Project DoHipMinisterio de Economía. Programa Ramon y Cajal, RyC RYC-2013-13976Consejo Nacional de Investigaciones Cientí- ficas y Técnicas (CONICET)Universidad Nacional del Sur (UNS)Ministerio de Ciencia, Tecnología e Innovación Productiva (MinCyT)Ministry (MINECO) Proyecto CTQ 2011-14825-E (Programa Explora
|
Melting point depression effect with CO2 in high melting temperature cellulose dissolving ionic liquids. Modeling with group contribution equation of state
|
melting point depression effect with co2 in high melting temperature cellulose dissolving ionic liquids. modeling with group contribution equation of state
|
producción científicaionic liquids alkylmethylimidazolium chloride solubilize cellulose polymers processing. nevertheless disadvantages melting viscosities. dissolution dioxide melting ionic liquids presenting problems. pressurized dioxide melting depression ionic liquids dissolve biopolymers experimentally melting method. ionic liquids mpa. ionic liquids chloride anion cations butyl methylimidazolium ethyl methylimidazolium allyl methylimidazolium amim hydroxyethyl methylimidazolium ohmim ammonium cation choline dihydrogen phosphate anion melting depression ionic liquids chloride went choline dihydrogen phosphate. correlate melting depression imidazolium chloride skjold jørgensen fugacity employed. parameterization vapor–liquid liquid–liquid solid–liquid equilibria infinite dilution. melting depression .junta castilla león marie curie program. dohipministerio economía. programa ramon cajal consejo nacional investigaciones cientí ficas técnicas conicet universidad nacional ministerio ciencia tecnología innovación productiva mincyt ministry mineco proyecto programa explora
|
exact_dup
|
[
"196151720"
] |
144012946
|
10.1002/app.26206
|
Surgical adhesives can be applied to wound closure and to covering and protecting surface wounds. Depending on their degradability, they can then slough off or can be reabsorbed by the organism when the wound initiates the healing process. In this work, we intended to develop a new urethane-based bioadhesive that could accomplish these purposes. Urethanes are considered to be promising candidates as adhesives because of the possibility of their synthesis as prepolymers and therefore their reaction with amino groups present in the biological molecules. Some urethanes were obtained by the reaction of poly(ethylene glycol) with isophorone diisocyanate. The characterization of the various materials was accomplished with different techniques: attenuated total reflection/Fourier transform infrared, swelling-capacity determination, the evaluation of the moisture-curing kinetics, a reaction with aminated substrates (as a simulation of the living tissues), and the determination of the surface energy by contact-angle measurements. The study of the thermal properties of the urethanes was performed by dynamical mechanical thermal analysis, differential scanning calorimetry, and thermogravimetric analysis. The hemocompatibility of the urethane was also evaluated by thrombosis and hemolysis tests. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007http://dx.doi.org/10.1002/app.2620
|
Synthesis and characterization of a poly(ethylene glycol) prepolymer to be applied as a bioadhesive
|
synthesis and characterization of a poly(ethylene glycol) prepolymer to be applied as a bioadhesive
|
surgical adhesives wound closure covering protecting wounds. degradability slough reabsorbed organism wound initiates healing process. intended urethane bioadhesive accomplish purposes. urethanes promising candidates adhesives prepolymers molecules. urethanes poly ethylene glycol isophorone diisocyanate. accomplished attenuated reflection fourier transform infrared swelling moisture curing kinetics aminated substrates living tissues measurements. urethanes scanning calorimetry thermogravimetric analysis. hemocompatibility urethane thrombosis hemolysis tests. appl polym app.
|
exact_dup
|
[
"19125489"
] |
144013090
|
10.1002/elan.1140081104
|
An electrochemical method for the determination of the anticancer platinum drug carboplatin using a DNA-modified electrode was developed. This electrode was successfully used for the electrochemical determination of carboplatin in serum samples of patients with ovarian cancer undergoing treatment. The electrochemical results clearly demonstrated that, for low concentrations, carboplatin interacts preferentially with adenine rather than guanine groups in the DNA and they can contribute to clarifying the mechanisms of interaction of platinum anticancer drugs with DNA. The pharmacokinetics corresponding to the administration of the drug was followed electrochemically and the detection limit in serum samples was 5.7 × 10 -6M. Due to a similar mechanism of reaction with DNA other platinum anticancer drugs can be determined by this method.http://dx.doi.org/10.1002/elan.114008110
|
Electrochemical determination of carboplatin in serum using a DNA-modified glassy carbon electrode
|
electrochemical determination of carboplatin in serum using a dna-modified glassy carbon electrode
|
electrochemical anticancer platinum carboplatin electrode developed. electrode successfully electrochemical carboplatin ovarian undergoing treatment. electrochemical carboplatin interacts preferentially adenine guanine clarifying platinum anticancer drugs dna. pharmacokinetics administration electrochemically platinum anticancer drugs method. elan.
|
exact_dup
|
[
"19125589"
] |
144013532
|
10.1007/s11227-007-0143-3
|
Abstract Conventional modeling and simulation formalisms only give support to the representation of model behavior, providing no constructs for describing changes in model structure. However, some systems are better modeled by self-reconfigurable formalisms. We have developed the Discrete Flow System Specification (DFSS) to exploit dynamic structure, component-based and hierarchical model construction. Due to structural similarity, dynamic self-configuring DFSS models offer a good description of systems, like adaptive algorithms and reconfigurable computer architectures. In this paper, we present the modeling and simulation of a parallel adaptive divide-and-conquer integration algorithm in the CaosTalk modeling and simulation framework, a realization of the DFSS formalism.http://dx.doi.org/10.1007/s11227-007-0143-
|
Modeling and simulation of parallel adaptive divide-and-conquer algorithms
|
modeling and simulation of parallel adaptive divide-and-conquer algorithms
|
formalisms constructs describing structure. modeled reconfigurable formalisms. specification dfss exploit hierarchical construction. similarity configuring dfss offer adaptive reconfigurable architectures. adaptive divide conquer caostalk realization dfss formalism.
|
exact_dup
|
[
"19125838"
] |
144013911
|
10.1007/s11123-007-0077-z
|
Abstract This paper discusses the role played by internal restructuring vis-à-vis external restructuring in industry productivity growth, arguing that the contribution of these two components is expected to be sensitive to the economic cycle. The study describes gross flows (job and output) over a period of one decade, and analyses the productivity differential among continuing, entering and exiting firms in the Portuguese manufacturing sector. The results of the decomposition of industry productivity growth suggest that the share of external restructuring is stronger in recession, while internal restructuring seems to be predominant in expansion. The strong and positive contribution of the net entry effect, in 1991–1994, was not followed by any between and cross effects of equivalent magnitude in the 1994–1997 sub-period. The within effect is, as expected, stronger when output growth is at its peak, but in no case large enough to turn productivity growth procyclical.http://dx.doi.org/10.1007/s11123-007-0077-
|
Internal and external restructuring over the cycle: a firm-based analysis of gross flows and productivity growth in Portugal
|
internal and external restructuring over the cycle: a firm-based analysis of gross flows and productivity growth in portugal
|
discusses played restructuring restructuring productivity arguing cycle. describes gross flows decade productivity continuing entering exiting firms portuguese manufacturing sector. decomposition productivity share restructuring stronger recession restructuring predominant expansion. entry period. stronger productivity procyclical.
|
exact_dup
|
[
"19126040"
] |
147595684
|
10.1063/1.2174107
|
We present optically-pumped emission data for ZnO, showing that high excitation effects and stimulated emission / lasing are observed in nanocrystalline ZnO thin films at room temperature, although such effects are not seen in bulk material of better optical quality. A simple model of exciton density profiles is developed which explains our results and those of other authors. Inhibition of exciton diffusion in nanocrystalline samples compared to bulk significantly increases exciton densities in the former, leading, via the nonlinear dependence of emission in the exciton bands on the pump intensity, to large increases in emission and to stimulated emission
|
Effects of excitonic diffusion on stimulated emission\ud
in nanocrystalline ZnO
|
effects of excitonic diffusion on stimulated emission\ud in nanocrystalline zno
|
optically pumped stimulated lasing nanocrystalline films room quality. exciton explains authors. exciton nanocrystalline exciton densities former exciton pump stimulated
|
exact_dup
|
[
"11307917"
] |
147608605
|
10.1021/acs.chemmater.5b01860
|
Light-responsive hydrogel valves with enhanced response characteristics compatible with microfluidics have been obtained by optimization of molecular design of spiropyran photoswitches and gel composition. Self-protonating gel formulations were exploited, wherein acrylic acid was copolymerized in the hydrogel network as an internal proton do-nor, to achieve a swollen state of the hydrogel in water at neutral pH. Light-responsive properties were endowed upon the hydrogels by copolymerization of spiropyran chromophores, using electron withdrawing and donating groups to tune the gel-swelling rate. Faster macroscopic swelling of the hydrogels was obtained by changing an ester to an ether at the 6’ position (factor of 4) or shifting the ether group to the 8’ position of the spiropyran (factor of 2.5) producing a 10 fold increase in total. The effect was also visible in the swelling behavior of the corresponding hydrogel valves, where the ob-served macroscopic changes were reversible and reproducible and in agreement with the molecular kinetics. Gel-valves integrated within microfluidic channels have been fabricated and allow reversible and repeatable operation, with opening of the valve effected in 1 minute, while closing takes around 5.5 minutes
|
Molecular design of light-responsive hydrogels, for in-situ generation of fast and reversible valves for microfluidic applications
|
molecular design of light-responsive hydrogels, for in-situ generation of fast and reversible valves for microfluidic applications
|
responsive hydrogel valves compatible microfluidics spiropyran photoswitches composition. protonating formulations exploited wherein acrylic copolymerized hydrogel proton swollen hydrogel neutral responsive endowed hydrogels copolymerization spiropyran chromophores withdrawing donating tune swelling rate. faster macroscopic swelling hydrogels changing ester ether shifting ether spiropyran producing total. visible swelling hydrogel valves served macroscopic reversible reproducible kinetics. valves microfluidic fabricated reversible repeatable opening valve effected minute closing minutes
|
exact_dup
|
[
"77222186"
] |
147609004
|
10.1007/s12011-015-0308-5
|
Cigarette smoking interferes with the metal homeostasis of the human body, which plays a crucial role for maintaining the health. A significant flux of heavy metals, among other toxins, reaches the lungs through smoking. In the present study, the relationship between toxic element (TE) exposure via cigarette smoking and diabetic mellitus incidence in population living in Dublin, Ireland is investigated. The trace [zinc (Zn) and selenium (Se)] and toxic elements arsenic (As), aluminum (Al), cadmium (Cd), nickel (Ni), mercury (Hg), and lead (Pb) were determined in biological (scalp hair and blood) samples of patients diagnosed with diabetic mellitus, who are smokers living in Dublin, Ireland. These results were compared with age and sex matched healthy, nonsmokers controls. The different brands of cigarette (filler tobacco, filter, and ash) consumed by the studied population were also analyzed for As, Al, Cd, Ni, Hg, and Pb. The concentrations of TEs in biological samples and different components of cigarette were measured by inductively coupled plasma atomic emission spectrophotometer after microwave-assisted acid digestion. The validity and accuracy of the methodology were checked using certified reference materials (CRM). The recovery of all the studied elements wasfound to be in the range of 96.4–99.7 % in certified reference materials. The filler tobacco of different branded cigarettes contains Hg, As, Al, Cd, Ni, and Pb concentrations in the ranges of 9.55–12.4 ng/cigarette, 0.432– 0.727 μg/cigarette, 360–496 μg/cigarette, 1.70–2.12 μg/cigarette, 0.715–1.52 μg/cigarette, and 0.378–1.16 μg/cigarette, respectively. The results of this study showed that the mean values of Al, As, Cd, Hg, Ni, and Pb were significantly higher in scalp hair and blood samples of diabetic mellitus patients in relation to healthy controls, while the difference was significant in the case of smoker patients (p<0.001). The levels of all six toxic elements were twofolds to threefolds higher in scalp hair and blood samples of nondiabetic mellitus smoker subjects as compared to nonsmoker controls. The high exposure of toxic metals as a result of cigarette smoking may be synergistic with risk factors associated with diabetic mellitu
|
Effect of trace and toxic elements of different brands of cigarettes on the essential elemental status of Irish referent and diabetic mellitus consumers
|
effect of trace and toxic elements of different brands of cigarettes on the essential elemental status of irish referent and diabetic mellitus consumers
|
cigarette smoking interferes homeostasis plays crucial maintaining health. metals toxins reaches lungs smoking. toxic cigarette smoking diabetic mellitus incidence living dublin ireland investigated. trace zinc selenium toxic arsenic aluminum cadmium nickel mercury scalp hair diagnosed diabetic mellitus smokers living dublin ireland. matched healthy nonsmokers controls. brands cigarette filler tobacco filter consumed cigarette inductively spectrophotometer microwave assisted digestion. validity methodology checked certified recovery wasfound certified materials. filler tobacco branded cigarettes ranges cigarette cigarette cigarette cigarette cigarette cigarette respectively. scalp hair diabetic mellitus healthy smoker toxic twofolds threefolds scalp hair nondiabetic mellitus smoker nonsmoker controls. toxic metals cigarette smoking synergistic diabetic mellitu
|
exact_dup
|
[
"30934866"
] |
147609435
|
10.1007/978-3-319-44817-6_1
|
The software development industry is dominated by a myriad of smaller organizations world-wide, including very small entities (VSEs), which have up to 25 people. Managing software process is a big challenge for practitioners. In 2011, due to the VSEs’ increasing importance, a set of ISO/IEC 29110 standards and guides were released. Although other initiatives are devoted to small entities, ISO/IEC 29110 is becoming the widely adopted standard. But it is an emerging standard and practitioners need to be actively engaged in their learning. In this sense, serious games offer the potential to entertain and educate. This study shows empirical evidence to support the overall applicability of the game proposed as learning tool. Moreover, the results indicate that the learning tool creates a positive experience, and therefore could be used as a strategy to promote the standard
|
Bridging the gap between SPI and SMEs in educational settings: a learning tool suporting ISO/IEC 29110
|
bridging the gap between spi and smes in educational settings: a learning tool suporting iso/iec 29110
|
dominated myriad organizations entities vses people. managing challenge practitioners. vses’ standards guides released. initiatives devoted entities becoming widely adopted standard. emerging practitioners actively engaged learning. serious games offer entertain educate. applicability game tool. creates promote
|
exact_dup
|
[
"77222359"
] |
147609615
|
10.1080/09669760.2012.716700
|
This position article argues that educators’ knowledge of young children’s perspectives on aspects of early learning, including literacy learning, and subsequent interpretations of the ways that these perspectives can inform and shape pedagogy are key to promoting children’s participation rights in early childhood education and care. Drawing on ideas such as guided participation and Bruner’s notion of a pedagogy of mutuality, it is argued that pedagogy, as it is now understood, implies that children’s participation is central to the task of teaching. It is also argued that explicit articulation of the concept of joint participation in relation to literacy curricula and pedagogy in early childhood is warranted. The latter part of the article raises the issue of the diversity of children’s perspectives of literacy learning and pedagogy. There follows a discussion of some of the issues related to working with young children’s perspectives on literacy
|
Children’s participation rights in early childhood education and care: the case of early literacy learning and pedagogy
|
children’s participation rights in early childhood education and care: the case of early literacy learning and pedagogy
|
argues educators’ children’s perspectives literacy interpretations ways perspectives inform pedagogy promoting children’s participation rights childhood care. drawing ideas guided participation bruner’s notion pedagogy mutuality argued pedagogy understood children’s participation teaching. argued articulation participation literacy curricula pedagogy childhood warranted. raises diversity children’s perspectives literacy pedagogy. children’s perspectives literacy
|
exact_dup
|
[
"77222429"
] |
148658127
|
10.1016/j.tsf.2010.09.039
|
Ternary chalcopyrite semiconductors are well known as promising materials for photovoltaic applications. The substitution of group IV atoms in sulfur and selenium copper gallium chalcopyrites GaCuX2, with X = S and Se, could have important implications either for photovoltaic or spintronic applications. To better understand these effects, we have made first-principles calculations on the doped chalcopyrites with group IV atoms, with different concentrations and geometries. Many of these materials have an intermediate band that modifies the optical properties of the host semiconductor. The sub-gap absorptions have also been determined using the absorption coefficients
|
Electronic and optical properties of the group IV doped copper gallium chalcopyrites
|
electronic and optical properties of the group iv doped copper gallium chalcopyrites
|
ternary chalcopyrite semiconductors promising photovoltaic applications. substitution sulfur selenium copper gallium chalcopyrites gacux photovoltaic spintronic applications. principles doped chalcopyrites geometries. modifies semiconductor. absorptions
|
exact_dup
|
[
"11996799"
] |
148658480
|
10.1016/j.nima.2009.12.084
|
Several important research programs are dedicated to the development of facilities based on deuteron accelerators. In designing these facilities, the definition of a validated computational approach able to simulate deuteron transport and evaluate deuteron interactions and production of secondary particles with acceptable precision is a very important issue. Current Monte Carlo codes, such as MCNPX or PHITS, when applied for deuteron transport calculations use built-in semi-analytical models to describe deuteron interactions. These models are found unreliable in predicting neutron and photon generated by low energy deuterons, typically present in those facilities.\ud
\ud
We present a new computational tool, resulting from an extension of the MCNPX code, which improve significantly the treatment of problems where any secondary product (neutrons, photons, tritons, etc.) generated by low energy deuterons reactions could play a major role. Firstly, it handles deuteron evaluated data libraries, which allow describing better low deuteron energy interactions. Secondly, it includes a reduction variance technique for production of secondary particles by charged particle-induced nuclear interactions, which allow reducing drastically the computing time needed in transport and nuclear response calculations. Verification of the computational tool is successfully achieved. This tool can be very helpful in addressing design issues such as selection of the dedicated neutron production target and accelerator radioprotection analysis. It can be also helpful to test the deuteron cross-sections under development in the frame of different international nuclear data program
|
New capabilities for Monte Carlo simulation of deuteron transport and secondary products generation
|
new capabilities for monte carlo simulation of deuteron transport and secondary products generation
|
programs dedicated facilities deuteron accelerators. designing facilities validated simulate deuteron deuteron acceptable precision issue. monte carlo codes mcnpx phits deuteron built deuteron interactions. unreliable predicting neutron deuterons facilities. mcnpx neutrons photons tritons etc. deuterons role. firstly handles deuteron libraries describing deuteron interactions. secondly reducing drastically calculations. verification successfully achieved. helpful addressing dedicated neutron accelerator radioprotection analysis. helpful deuteron
|
exact_dup
|
[
"11997162"
] |
148660766
|
10.1007/978-3-642-21326-7_1
|
In this paper a layered architecture to spot and characterize vowel segments in running speech is presented. The detection process is based on neuromorphic principles, as is the use of Hebbian units in layers to implement lateral inhibition, band probability estimation and mutual exclusion. Results are presented showing how the association between the acoustic set of patterns and the phonologic set of symbols may be created. Possible applications of this methodology are to be found in speech event spotting, in the study of pathological voice and in speaker biometric characterization, among others
|
Neuromorphic Detection of Vowel Representation Spaces
|
neuromorphic detection of vowel representation spaces
|
layered architecture spot characterize vowel segments running speech presented. neuromorphic principles hebbian implement lateral mutual exclusion. acoustic phonologic symbols created. methodology speech spotting pathological voice speaker biometric
|
exact_dup
|
[
"11999378"
] |
148662244
|
10.1016/j.compag.2010.09.013
|
One important issue emerging strongly in agriculture is related with the automatization of tasks, where the optical sensors play an important role. They provide images that must be conveniently processed. The most relevantimage processing procedures require the identification of green plants, in our experiments they come from barley and corn crops including weeds, so that some types of action can be carried out, including site-specific treatments with chemical products or mechanical manipulations. Also the identification of textures belonging to the soil could be useful to know some variables, such as humidity, smoothness or any others. Finally, from the point of view of the autonomous robot navigation, where the robot is equipped with the imaging system, some times it is convenient to know not only the soil information and the plants growing in the soil but also additional information supplied by global references based on specific areas. This implies that the images to be processed contain textures of three main types to be identified: green plants, soil and sky if any. This paper proposes a new automatic approach for segmenting these main textures and also to refine the identification of sub-textures inside the main ones. Concerning the green identification, we propose a new approach that exploits the performance of existing strategies by combining them. The combination takes into account the relevance of the information provided by each strategy based on the intensity variability. This makes an important contribution. The combination of thresholding approaches, for segmenting the soil and the sky, makes the second contribution; finally the adjusting of the supervised fuzzy clustering approach for identifying sub-textures automatically, makes the third finding. The performance of the method allows to verify its viability for automatic tasks in agriculture based on image processin
|
Automatic segmentation of relevant textures in agricultural images
|
automatic segmentation of relevant textures in agricultural images
|
emerging agriculture automatization tasks sensors role. conveniently processed. relevantimage come barley corn crops weeds treatments manipulations. textures belonging humidity smoothness others. autonomous robot navigation robot equipped convenient growing supplied areas. processed textures any. proposes automatic segmenting textures refine textures ones. concerning propose exploits combining them. relevance variability. contribution. thresholding segmenting adjusting supervised fuzzy clustering identifying textures automatically finding. verify viability automatic tasks agriculture processin
|
exact_dup
|
[
"12000940"
] |
148664115
|
10.1063/1.3684968
|
In this paper, a model for intermediate band solar cells is built based on the generally understood physical concepts ruling semiconductor device operation, with special emphasis on the behavior at low temperature. The model is compared to JL-VOC measurements at concentrations up to about 1000 suns and at temperatures down to 20 K, as well as measurements of the radiative recombination obtained from electroluminescence. The agreement is reasonable. It is found that the main reason for the reduction of open circuit voltage is an operational reduction of the bandgap, but this effect disappears at high concentrations or at low temperatures
|
Understanding the operation of quantum dot intermediate band solar cells
|
understanding the operation of quantum dot intermediate band solar cells
|
built understood concepts ruling semiconductor emphasis temperature. suns radiative recombination electroluminescence. reasonable. circuit operational bandgap disappears
|
exact_dup
|
[
"12002431"
] |
150209026
|
10.1080/00207160.2013.778400
|
Producción CientíficaWe deeply researched into the asymptotic behaviour of a numerical method adapted for the
solution of mathematical model of hematopoiesis which describes the dynamics of a stem cell
population. We investigated the stationary solutions of the original model by their numerical
approximation: we proved the existence of a numerical stationary solution that provides a
good approximation to the nontrivial equilibrium solution of the problem. Also, we presented
a numerical simulation which confirms this behaviour.Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. VA191U13
|
Asymptotic behaviour of a mathematical model of hematopoietic stem cell dynamics
|
asymptotic behaviour of a mathematical model of hematopoietic stem cell dynamics
|
producción científicawe deeply researched asymptotic adapted mathematical hematopoiesis describes population. stationary proved stationary nontrivial problem. confirms behaviour.junta castilla león programa apoyo proyectos investigación ref.
|
exact_dup
|
[
"75991434"
] |
151396327
|
10.1038/s41396-018-0072-6
|
Isoprene (2-methyl-1,3-butadiene), the most abundantly produced biogenic volatile organic compound (BVOC) on Earth, is highly reactive and can have diverse and often detrimental atmospheric effects, which impact on climate and health. Most isoprene is produced by terrestrial plants, but (micro)algal production is important in aquatic environments, and the relative bacterial contribution remains unknown. Soils are a sink for isoprene, and bacteria that can use isoprene as a carbon and energy source have been cultivated and also identified using cultivation-independent methods from soils, leaves and coastal/marine environments. Bacteria belonging to the Actinobacteria are most frequently isolated and identified, and Proteobacteria have also been shown to degrade isoprene. In the freshwater-sediment isolate, Rhodococcus strain AD45, initial oxidation of isoprene to 1,2-epoxy-isoprene is catalyzed by a multicomponent isoprene monooxygenase encoded by the genes isoABCDEF. The resultant epoxide is converted to a glutathione conjugate by a glutathione S-transferase encoded by isoI, and further degraded by enzymes encoded by isoGHJ. Genome sequence analysis of actinobacterial isolates belonging to the genera Rhodococcus, Mycobacterium and Gordonia has revealed that isoABCDEF and isoGHIJ are linked in an operon, either on a plasmid or the chromosome. In Rhodococcus strain AD45 both isoprene and epoxy-isoprene induce a high level of transcription of 22 contiguous genes, including isoABCDEF and isoGHIJ. Sequence analysis of the isoA gene, encoding the large subunit of the oxygenase component of isoprene monooxygenase, from isolates has facilitated the development of PCR primers that are proving valuable in investigating the ecology of uncultivated isoprene-degrading bacteria
|
Microbial cycling of isoprene, the most abundantly produced biological volatile organic compound on Earth
|
microbial cycling of isoprene, the most abundantly produced biological volatile organic compound on earth
|
isoprene methyl butadiene abundantly biogenic volatile compound bvoc earth reactive diverse detrimental health. isoprene terrestrial micro algal aquatic environments bacterial unknown. soils sink isoprene bacteria isoprene cultivated cultivation soils leaves coastal marine environments. bacteria belonging actinobacteria frequently proteobacteria degrade isoprene. freshwater sediment isolate rhodococcus oxidation isoprene epoxy isoprene catalyzed multicomponent isoprene monooxygenase encoded isoabcdef. resultant epoxide converted glutathione conjugate glutathione transferase encoded isoi degraded enzymes encoded isoghj. actinobacterial isolates belonging genera rhodococcus mycobacterium gordonia isoabcdef isoghij operon plasmid chromosome. rhodococcus isoprene epoxy isoprene induce contiguous isoabcdef isoghij. isoa encoding subunit oxygenase isoprene monooxygenase isolates facilitated primers proving valuable investigating ecology uncultivated isoprene degrading bacteria
|
exact_dup
|
[
"151186212"
] |
15145309
|
10.1083/jcb.201110049
|
Two intraflagellar transport (IFT) complexes, IFT-A and IFT-B, build and maintain primary cilia and are required for activity of the Sonic hedgehog (Shh) pathway. A weak allele of the IFT-A gene, Ift144, caused subtle defects in cilia structure and ectopic activation of the Shh pathway. In contrast, strong loss of IFT-A, caused by either absence of Ift144 or mutations in two IFT-A genes, blocked normal ciliogenesis and decreased Shh signaling. In strong IFT-A mutants, the Shh pathway proteins Gli2, Sufu, and Kif7 localized correctly to cilia tips, suggesting that these pathway components were trafficked by IFT-B. In contrast, the membrane proteins Arl13b, ACIII, and Smo failed to localize to primary cilia in the absence of IFT-A. We propose that the increased Shh activity seen in partial loss-of-function IFT-A mutants may be a result of decreased ciliary ACIII and that the loss of Shh activity in the absence of IFT-A is a result of severe disruptions of cilia structure and membrane protein trafficking
|
The IFT-A complex regulates Shh signaling through cilia structure and membrane protein trafficking
|
the ift-a complex regulates shh signaling through cilia structure and membrane protein trafficking
|
intraflagellar complexes build maintain cilia sonic hedgehog pathway. allele subtle defects cilia ectopic pathway. blocked ciliogenesis signaling. mutants sufu localized correctly cilia tips trafficked aciii failed localize cilia propose mutants ciliary aciii disruptions cilia trafficking
|
exact_dup
|
[
"28942549"
] |
151646285
|
10.1007/s12540-013-2006-1
|
This study evaluates the influence of grain refiners/modifiers on the mechanical properties of the Al-7Si and Al-11Si alloys with an experiment of quantitative and qualitative correlations with the microstructure. Modification of Al-Si alloys with strontium additions and grain refinement with Al-Ti, Al-B and Al-T-B\ud
master alloy additions are demonstrated to be efficient on Al-Si alloys. A single master alloy with combined additions of Sr and Ti and/or B was prepared and the microstructure and mechanical properties were studied. The results show that boron rich (Al-3B-Sr and Al-1Ti-3B-Sr) master alloys are more efficient than Ti rich (Al-3Ti-Sr and Al-5Ti-1B-Sr) master alloys considering their combined grain refinement and modification effect on Al-7Si and Al-11Si alloys. However, the presence of Sr does not influence the grain refinement. Similarly, presence of grain refiner does not influence the modification of eutectic Si
|
Effect of a Grain Refiner Cum Modifier on Mechanical Properties of Al-7Si and Al-11Si Alloys
|
effect of a grain refiner cum modifier on mechanical properties of al-7si and al-11si alloys
|
evaluates grain refiners modifiers alloys qualitative microstructure. modification alloys strontium additions grain refinement master alloy additions alloys. master alloy additions microstructure studied. boron master alloys master alloys grain refinement modification alloys. grain refinement. grain refiner modification eutectic
|
exact_dup
|
[
"31237581"
] |
154672040
|
10.1021/acs.est.5b04226
|
Elevated concentrations of various industrial-use persistent organic pollutants (POPs), such as polychlorinated biphenyls (PCBs), have been reported in some developing areas in sub-tropical and tropical regions known to be destinations of e-waste. We used a recent inventory of the global generation and exports of e-waste to develop various global scale emission scenarios for industrial-use organic contaminants (IUOCs). For representative IUOCs (RIUOCs), only hypothetical emissions via passive volatilization from e-waste were considered whereas for PCBs, historical emissions throughout the chemical life-cycle (i.e., manufacturing, use, disposal) were included. The environmental transport and fate of RIUOCs and PCBs were then simulated using the BETR Global 2.0 model. Export of e-waste is expected to increase and sustain global emissions beyond the baseline scenario, which assumes no export. A comparison between model predictions and observations for PCBs in selected recipient regions generally suggests a better agreement when exports are accounted for. This study may be the first to integrate the global transport of IUOCs in waste with their long range transport in air and water. The results call for integrated chemical management strategies on a global scale
|
Tracking the global distribution of Persistent Organic Pollutants accounting for e-waste exports to developing regions
|
tracking the global distribution of persistent organic pollutants accounting for e-waste exports to developing regions
|
elevated industrial persistent pollutants pops polychlorinated biphenyls pcbs tropical tropical destinations waste. inventory exports waste scenarios industrial contaminants iuocs iuocs riuocs hypothetical passive volatilization waste pcbs historical i.e. manufacturing disposal included. fate riuocs pcbs betr model. export waste sustain assumes export. pcbs recipient exports accounted for. integrate iuocs waste water. call
|
exact_dup
|
[
"52133239"
] |
161233835
|
10.1002/hbm.24066
|
Producción CientíficaObjective: To assess using graph-theory properties of both structural and functional networks in schizophrenia patients, as well as the possible prediction of the latter based on the former. Abnormal structural and functional network parameters have been found in schizophrenia, but the dependence of functional network properties on structural alterations has not been described yet in this syndrome.
Experimental design: We applied averaged path-length (PL), clustering coefficient (CLC) and density (D) measurements to structural data derived from diffusion magnetic resonance and functional data derived from electroencephalography in 39 schizophrenia patients and 79 controls. Functional data were collected for the global and theta frequency bands with subjects performing an odd-ball task, both prior to stimulus delivery and at the corresponding processing window. Connectivity matrices were constructed respectively from (i) tractography and registered cortical segmentations (structural) and (ii) phase-locking values (functional).
Principal observations: In both groups, we observed a significant EEG task-related modulation (change between pre-stimulus and response windows) in the global and theta bands. Patients showed larger structural PL and pre-stimulus density in the global and theta bands, and lower PL task-related modulation in the theta band. Structural network values predicted pre-stimulus global band values in controls and global band task-related modulation in patients. Abnormal functional values found in patients (pre-stimulus density in the global and theta bands and task-related modulation in the theta band) were not predicted by structural data in this group. Structural and functional network abnormalities respectively predicted cognitive performance and positive symptoms in patients.
Conclusions: Taken together, the alterations in the structural and functional theta networks in the patients and the lack of significant relations between these alterations, suggest that these types of network abnormalities exist in different groups of schizophrenia patients.This research project was supported in part by grants from Instituto de Salud Carlos III under project PI15/00299, “Gerencia Regional de Salud de Castilla y León” under projects GRS 1263/A/16 and GRS 1485/A/17, and “Ministerio de Economía y Competitividad” and FEDER under grants TEC2014-53196-R and TEC2013-44194-P; by ‘European Commission’ and FEDER under project 'Análisis y correlación entre el genoma completo y la actividad cerebral para la ayuda en el diagnóstico de la enfermedad de Alzheimer' ('Cooperation Programme Interreg V-A Spain-Portugal POCTEP 2014-2020'), and by ‘Consejería de Educación de la Junta de Castilla y León’ and FEDER under project VA037U16. J. Gomez-Pilar was in receipt of a grant from University of Valladolid and A. Lubeiro was in receipt of a grant from Consejería de Educación de la Junta de Castilla y León
|
Relations between structural and EEG-based graph metrics in healthy controls and schizophrenia patients
|
relations between structural and eeg-based graph metrics in healthy controls and schizophrenia patients
|
producción científicaobjective schizophrenia former. abnormal schizophrenia alterations syndrome. averaged clustering electroencephalography schizophrenia controls. theta performing ball stimulus delivery window. connectivity tractography registered cortical segmentations locking principal modulation stimulus windows theta bands. stimulus theta modulation theta band. stimulus modulation patients. abnormal stimulus theta modulation theta group. abnormalities patients. alterations theta alterations abnormalities schizophrenia patients.this grants instituto salud carlos “gerencia salud castilla león” projects “ministerio economía competitividad” feder grants ‘european commission’ feder análisis correlación entre genoma completo actividad cerebral para ayuda diagnóstico enfermedad alzheimer cooperation programme interreg spain portugal poctep ‘consejería educación junta castilla león’ feder gomez pilar receipt valladolid lubeiro receipt consejería educación junta castilla león
|
exact_dup
|
[
"196152202"
] |
161705216
|
10.1007/978-3-319-91602-6_18
|
Stress is an important workplace issue, affecting both the health of individuals, and the health of organizations. Early advocacy for Agile Software Development suggested it might help avoid stress, with practices that emphasize a sustainable pace, and self-organizing teams. Our analysis of a 2014 survey, however, suggested that stress might still be commonplace in Agile teams, especially for those with less experience. We also noticed that newcomers to Agile emphasized technical, rather than collaborative, practices, and speculated this might explain the stress. We explored this in our analysis of a follow-up survey conducted in 2016, and report our findings in this paper. We show that there are a variety of factors involved, and that avoiding stress is associated with both collaborative and technical practices, and a range of outcomes
|
Stress in agile software development : practices and outcomes
|
stress in agile software development : practices and outcomes
|
workplace affecting organizations. advocacy agile avoid practices emphasize sustainable pace organizing teams. commonplace agile teams experience. noticed newcomers agile emphasized collaborative practices speculated stress. explored paper. avoiding collaborative practices
|
exact_dup
|
[
"161690039"
] |
18275479
|
10.1016/j.ijfatigue.2012.08.004
|
Lien vers la version éditeur: http://www.sciencedirect.com/science/article/pii/S0142112312002472This article is dedicated to the high cycle fatigue behaviour of cast hypo-eutectic Al–Si alloys and in particular the AlSi7Cu05Mg03 alloy. In a vast experimental campaign undertaken to investigate the fatigue damage mechanisms operating in this alloy, subject to complex loading conditions, it was shown that two different coexisting fatigue damage mechanisms occur in this materials, depending on the presence of different microstructural heterogeneities (i.e. micro-shrinkage pores, Si particles, Fe-rich intermetallic phases, DAS of the Al-matrix, etc.). In order to take into account both of these damage mechanisms, a probabilistic approach using the weakest link concept is introduced to model the competition between the two mechanisms. This approach leads naturally to a probabilistic Kitagawa type diagram, which explains the relationship between the fatigue behaviour of the material and the different casting processes or post-treatments (e.g. gravity casting and HIP). It is shown that the sensitivity to the different loading modes (i.e. uniaxial with and without mean stress, torsion and equibiaxial tension) depends on the microstructural heterogeneities responsible for crack initiation. For a porosity-free alloy, the predictions are very good for combined tension–torsion loading modes. When pores are present and control the fatigue strength, the predictions are very satisfactory for the uniaxial loads with different R-ratios and slightly conservative for multiaxial loads (i.e. torsion and equibiaxial tension). Never-the-less, they are much better than the predictions of the Dang Van criterion [1]
|
A probabilistic model for the high cycle fatigue behaviour of cast aluminium alloys subject to complex loads
|
a probabilistic model for the high cycle fatigue behaviour of cast aluminium alloys subject to complex loads
|
lien vers éditeur dedicated fatigue cast hypo eutectic al–si alloys alsi alloy. vast campaign undertaken fatigue operating alloy loading coexisting fatigue microstructural heterogeneities i.e. micro shrinkage pores intermetallic etc. probabilistic weakest competition mechanisms. naturally probabilistic kitagawa explains fatigue casting treatments e.g. casting loading i.e. uniaxial torsion equibiaxial tension microstructural heterogeneities crack initiation. porosity alloy tension–torsion loading modes. pores fatigue satisfactory uniaxial loads conservative multiaxial loads i.e. torsion equibiaxial tension never dang criterion
|
exact_dup
|
[
"143691938"
] |
18424108
|
10.1016/j.commatsci.2012.05.005
|
Dislocation mobility —the relation between applied stress and dislocation velocity—is an important property to model the mechanical behavior of structural materials. These mobilities reflect the interaction between the dislocation core and the host lattice and, thus, atomistic resolution is required to capture its details. Because the mobility function is multiparametric, its computation is often highly demanding in terms of computational requirements. Optimizing how tractions are applied can be greatly advantageous in accelerating convergence and reducing the overall computational cost of the simulations. In this paper we perform molecular dynamics simulations of ½ 〈1 1 1〉 screw dislocation motion in tungsten using step and linear time functions for applying external stress. We find that linear functions over time scales of the order of 10–20 ps reduce fluctuations and speed up convergence to the steady-state velocity value by up to a factor of two
|
Techniques to accelerate convergence of stress-controlled molecular dynamics simulations of dislocation motion
|
techniques to accelerate convergence of stress-controlled molecular dynamics simulations of dislocation motion
|
dislocation mobility —the dislocation velocity—is materials. mobilities reflect dislocation atomistic capture details. mobility multiparametric demanding requirements. optimizing tractions greatly advantageous accelerating reducing simulations. screw dislocation tungsten stress. steady
|
exact_dup
|
[
"148663799"
] |
185571588
|
10.1007/s11664-017-5481-1
|
This paper presents an overview and analysis of our earlier obtained experimental results on the dependences of kinetic properties of single PbSe quantum wells and PbSe-based superlattices on the PbSe layer thickness d. The observed oscillatory character of these dependences is attributed to quantum size effects due to electron or hole confinement in quantum wells. Some general regularities and factors that determine the character of these quantum size effects are established. The influence of the oxidation processes and doping on the d-dependences of the transport properties is revealed. A periodic change in the conductivity type related to quantum size oscillations is detected. It is shown that the experimentally determined values of the oscillation period Dd are in good agreement with the results of theoretical calculations based on the model of a rectangular quantum well with infinitely high walls, taking into account the dependence of the Fermi energy eF on d and the availability of subbands below eF. It is established that the Dd value for the superlattices is practically equal to the Dd value observed for the single PbSe thin film
|
Size Effects in Transport Properties of PbSe Thin Films
|
size effects in transport properties of pbse thin films
|
presents overview dependences pbse wells pbse superlattices pbse oscillatory character dependences attributed confinement wells. regularities character established. oxidation doping dependences revealed. conductivity oscillations detected. experimentally oscillation rectangular infinitely walls fermi availability subbands superlattices practically pbse film
|
exact_dup
|
[
"185669378"
] |
187150171
|
10.1080/24704067.2017.1411165
|
In a changing and complex environment, international sport
federations (IFs) have to face new challenges. These challenges can
trigger or hinder IFs’ professionalization processes. While
researchers have examined organizational change and
professionalization of national sport federations (NFs) and clubs,
studies on IFs are rare. Considering professionalization as an
important element of IFs’ change processes in recent years, the
study attempts to fill this gap. The conceptual framework is based
on the concepts and dynamics of organizational change, the
influence of isomorphic pressures and the operationalization of a
multi-level framework. Data from six case studies was analyzed by
means of qualitative content analysis. Findings reveal multiple
causes of IFs’ professionalization. Three particular findings are
discussed: professionalization as a dynamic process with phases of
acceleration that vary depending on IFs’ size; IFs’ becoming
increasingly business-like through isomorphic changes; and five
causes of particular relevance to IFs’ current professionalization
process
|
Drivers of and Barriers to Professionalization in International Sport Federations
|
drivers of and barriers to professionalization in international sport federations
|
changing sport federations challenges. challenges trigger hinder ifs’ professionalization processes. researchers organizational professionalization sport federations clubs rare. professionalization ifs’ attempts fill gap. conceptual concepts organizational isomorphic pressures operationalization framework. qualitative analysis. reveal ifs’ professionalization. professionalization acceleration vary ifs’ ifs’ becoming increasingly isomorphic relevance ifs’ professionalization
|
exact_dup
|
[
"151212890"
] |
19125660
|
10.1002/ffj.1605
|
The essential oil of Dittrichia viscosa ssp. viscosa from Corsica was investigated by GC and 13C-NMR spectroscopy. First, the sample was submitted to an acido-basic partition and the neutral part was repeatedly chromatographed. The analysis of all the fractions led to the identification of 71 components. The main constituents were fokienol (21.1%), (E)-nerolidol (8.6%) and eudesm-6-en-4alpha-ol (6.2%). The antimicrobial activity of the neutral and acidic fractions were investigated. While the neutral part appeared to be inactive, the acidic part was active against all the tested microorganisms. The highest activity was obtained against Staphylococcus epidermidis, Streptococcus foecalis and Proteus vulgaris. Copyright © 2005 John Wiley & Sons, Ltd.http://dx.doi.org/10.1002/ffj.160
|
Essential oil of Dittrichia viscosa ssp. viscosa: analysis by 13C-NMR and antimicrobial activity
|
essential oil of dittrichia viscosa ssp. viscosa: analysis by 13c-nmr and antimicrobial activity
|
dittrichia viscosa ssp. viscosa corsica spectroscopy. submitted acido partition neutral repeatedly chromatographed. fractions components. constituents fokienol nerolidol eudesm alpha antimicrobial neutral acidic fractions investigated. neutral appeared inactive acidic microorganisms. staphylococcus epidermidis streptococcus foecalis proteus vulgaris. ffj.
|
exact_dup
|
[
"144013195"
] |
19125864
|
10.1007/s10856-007-3149-8
|
Abstract Recently there have been some developments in the preparation of controlled drug delivery systems for glaucoma. Many materials are being used in this area, namely gelatine and chitosan. Both of them present high levels of biocompatibility and biodegradability. In this paper, we wish to report the work we have been doing on the preparation and characterization of hydrogels based on gelatine and chitosan. The crosslinking agents used were 1-(3-(Dimethylamino)propyl)-3-Ethylcarbodiimide hydrocholide (CDI), 1,4-Butanodiol diglycidyl ether (epoxyde 1), Ethylene glycol diglycidyl ether (epoxyde 2) and genipin. The results obtained showed that all of the films were hydrogels. The surface and transversal cut showed a porous surface in all the films. The thermal analysis proved the modifications in the polymeric chains, with the stabilization of all of them by the crosslinking agents. The release pattern indicates that the gelatine films were the best since they release the adequate proportion of drug. Finally, the cytotoxicity showed that the gelatine films were all biocompatible, specially the ones crosslinked with one of the Epoxydes.http://dx.doi.org/10.1007/s10856-007-3149-
|
Immobilization of drugs for glaucoma treatment
|
immobilization of drugs for glaucoma treatment
|
developments preparation delivery glaucoma. gelatine chitosan. biocompatibility biodegradability. wish preparation hydrogels gelatine chitosan. crosslinking dimethylamino propyl ethylcarbodiimide hydrocholide butanodiol diglycidyl ether epoxyde ethylene glycol diglycidyl ether epoxyde genipin. films hydrogels. transversal porous films. proved modifications polymeric chains stabilization crosslinking agents. gelatine films adequate proportion drug. cytotoxicity gelatine films biocompatible specially crosslinked epoxydes.
|
exact_dup
|
[
"144013579"
] |
19125949
|
10.1023/A:1014292201540
|
This work reports studies of the degradation rates of a fattyalcohol polyglycol ether non-ionic surfactant, Genapol OXD-080, putatively useful for the control of red swamp crayfish (Procambarus clarkii Girard) in rice fields under laboratory and field conditions. The influence of temperature,sediment site specificity and sorption were taken into account.The degradation kinetics of the surfactant depends on the experimental conditions: type of inocula and temperature. Thedistribution of this chemical in aquatic systems was also examined. Genapol OXD-080 was removed into the sedimentsreadily after application, and sorption was considered the majorpath of removal from the water phase. Data suggest that furtherstudies are required regarding the effects of Genapol OXD-080 in aquatic organisms resident in rice fields, in parallelwith the development of technologies related with the use ofsurfactants to control P. clarkii populations.http://dx.doi.org/10.1023/A:101429220154
|
Degradability and Sediment Sorption of an Alcohol Polyglycol Ether Surfactant Putatively Useful for the Control of Red Swamp Crayfish in Rice Fields
|
degradability and sediment sorption of an alcohol polyglycol ether surfactant putatively useful for the control of red swamp crayfish in rice fields
|
degradation fattyalcohol polyglycol ether ionic surfactant genapol putatively swamp crayfish procambarus clarkii girard rice conditions. sediment specificity sorption account.the degradation kinetics surfactant inocula temperature. thedistribution aquatic examined. genapol removed sedimentsreadily sorption majorpath removal phase. furtherstudies genapol aquatic organisms resident rice parallelwith technologies ofsurfactants clarkii populations.
|
exact_dup
|
[
"144013749"
] |
19131997
|
10.1016/j.ecss.2010.11.009
|
Recent variations in the precipitation regime across southern Europe have led to changes in river fluxes and salinity gradients affecting biological communities in most rivers and estuaries. A sampling programme was developed in the Mondego estuary, Portugal, from January 2003 to December 2008 at five distinct sampling stations to evaluate spatial, seasonal and inter-annual distributions of fish larvae. Gobiidae was the most abundant family representing 80% of total catch and Pomatoschistus spp. was the most important taxon. The fish larval community presented a clear seasonality with higher abundances and diversities during spring and summer seasons. Multivariate analysis reinforced differences among seasons but not between years or sampling stations. The taxa Atherina presbyter, Solea solea, Syngnathus abaster, Crystallogobius linearis and Platichthys flesus were more abundant during spring/summer period while Ammodytes tobianus, Callionymus sp., Echiichthys vipera and Liza ramada were more abundant in autumn/winter. Temperature, chlorophyll a and river flow were the main variation drivers observed although extreme drought events (year 2005) seemed not to affect ichthyoplankton community structure. Main changes were related to a spatial displacement of salinity gradient along the estuarine system which produced changes in marine species distribution
|
Impact of climate variability on ichthyoplankton communities: An example of a small temperate estuary
|
impact of climate variability on ichthyoplankton communities: an example of a small temperate estuary
|
precipitation southern europe river fluxes salinity gradients affecting communities rivers estuaries. programme mondego estuary portugal december stations seasonal fish larvae. gobiidae abundant representing catch pomatoschistus spp. taxon. fish larval seasonality abundances diversities spring summer seasons. multivariate reinforced seasons stations. taxa atherina presbyter solea solea syngnathus abaster crystallogobius linearis platichthys flesus abundant spring summer ammodytes tobianus callionymus echiichthys vipera liza ramada abundant autumn winter. chlorophyll river drivers extreme drought seemed ichthyoplankton structure. displacement salinity estuarine marine
|
exact_dup
|
[
"144022945"
] |
25053776
|
10.1103/PhysRevA.90.063639
|
Using a cutoff-free formulation of the coherent transport theory, we show
that the interference terms at the origin of localization strongly affect the
transport anisotropy. In contrast to the common hypothesis, we then find that
the anisotropies of incoherent and coherent diffusion are significantly
different, in particular at criticality. There, we show that the coherent
transport anisotropy is mainly determined by the properties of the
disorder-averaged effective scattering medium while the incoherent transport
contributions become irrelevant
|
Anderson Localization of Matter Waves in 3D Anisotropic Disordered
Potentials
|
anderson localization of matter waves in 3d anisotropic disordered potentials
|
cutoff formulation coherent interference localization anisotropy. anisotropies incoherent coherent criticality. coherent anisotropy disorder averaged incoherent irrelevant
|
exact_dup
|
[
"51944700"
] |
2519804
|
10.1063/1.1623928
|
The convergence of integrals over charge densities is discussed in relation
with the problem of electric charge and (non-local) charged states in Quantum
Electrodynamics (QED). Delicate, but physically relevant, mathematical points
like the domain dependence of local charges as quadratic forms and the time
smearing needed for strong convergence of integrals of charge densities are
analyzed. The results are applied to QED and the choice of time smearing is
shown to be crucial for the removal of vacuum polarization effects responible
for the time dependence of the charge (Swieca phenomenon). The possibility of
constructing physical charged states in the Feynman-Gupta-Bleuler gauge as
limits of local states vectors is discussed, compatibly with the vanishing of
the Gauss charge on local states. A modification by a gauge term of the Dirac
exponential factor which yields the physical Coulomb fields from the
Feynman-Gupta-Bleuler fields is shown to remove the infrared divergence of
scalar products of local and physical charged states, allowing for a
construction of physical charged fields with well defined correlation functions
with local fields
|
Charge density and electric charge in quantum electrodynamics
|
charge density and electric charge in quantum electrodynamics
|
integrals densities electrodynamics delicate physically mathematical charges quadratic smearing integrals densities analyzed. smearing crucial removal responible swieca phenomenon constructing feynman gupta bleuler compatibly vanishing gauss states. modification dirac exponential coulomb feynman gupta bleuler remove infrared divergence allowing
|
exact_dup
|
[
"25367013"
] |
29138116
|
10.1016/j.polymer.2014.12.045
|
The time-temperature superposition property of an amorphous polymer acrylate network is characterized at infinitesimal strain by standard dynamic mechanical analysis tests. Comparison of the shift factors determined in uniaxial tension and in torsion shows that both tests provide equivalent time-temperature superposition properties. More interestingly, finite strain uniaxial tension tests run until break at constant strain rate show that the acrylate network exhibits the same time-temperature superposition property at finite strain as at infinitesimal strain. Such original experimental evidence provides new insight for finite strain constitutive modelling of polymer amorphous networks.ANR REFORM 10-JCJC-091
|
Direct experimental evidence of time-temperature superposition at finite strain for an amorphous polymer network
|
direct experimental evidence of time-temperature superposition at finite strain for an amorphous polymer network
|
superposition amorphous polymer acrylate infinitesimal tests. uniaxial tension torsion superposition properties. interestingly uniaxial tension break acrylate exhibits superposition infinitesimal strain. insight constitutive polymer amorphous networks.anr reform jcjc
|
exact_dup
|
[
"143694311"
] |
33107397
|
10.1051/0004-6361:20000153
|
We present Johnson B surface photometry for the UCM Survey galaxies. One-dimensional bulge-disk decomposition is attempted, discussing on fitting functions and computational procedures. The results from this decomposition, jointly with concentration indices and an asymmetry coefficient, are employed to study the morphological properties of these galaxies. We also compare our results with the previous morphological classification established using Gunn r imaging data and with other samples of galaxies. No major statistical differences in morphology are found between red and blue data, although some characteristics such as size and luminosity concentration vary. We find a correlation between luminosity and size. Several parameters are used to segregate the objects according to their morphological type
|
Optical photometry of the UCM lists I and II - II. B band surface photometry and morphological discussion
|
optical photometry of the ucm lists i and ii - ii. b band surface photometry and morphological discussion
|
johnson photometry galaxies. bulge decomposition attempted discussing fitting procedures. decomposition jointly indices asymmetry morphological galaxies. morphological gunn galaxies. morphology luminosity vary. luminosity size. segregate morphological
|
exact_dup
|
[
"33108896"
] |
33171298
|
10.1016/j.neuroimage.2013.09.065
|
Animal models and human functional imaging data implicate the dopamine system in mediating enhanced encoding of novel stimuli into human memory. A separate line of investigation suggests an association between a functional polymorphism in the promoter region for the human dopamine 4 receptor gene (DRD4) and sensitivity to novelty. We demonstrate, in two independent samples, that the -521Cmayor queT DRD4 promoter polymorphism determines the magnitude of human memory enhancement for contextually novel, perceptual oddball stimuli in an allele dose-dependent manner. The genotype-dependent memory enhancement conferred by the C allele is associated with increased neuronal responses during successful encoding of perceptual oddballs in the ventral striatum, an effect which is again allele dose-dependent. Furthermore, with repeated presentations of oddball stimuli, this memory advantage decreases, an effect mirrored by adaptation of activation in the hippocampus and substantia nigra/ventral tegmental area in C carriers only. Thus, a dynamic modulation of human memory enhancement for perceptually salient stimuli is associated with activation of a dopaminergic-hippocampal system, which is critically dependent on a functional polymorphism in the DRD4 promoter region
|
Dopamine receptor 4 promoter polymorphism modulates memory and neuronal responses to salience
|
dopamine receptor 4 promoter polymorphism modulates memory and neuronal responses to salience
|
implicate dopamine mediating encoding stimuli memory. polymorphism promoter dopamine novelty. cmayor quet promoter polymorphism determines enhancement contextually perceptual oddball stimuli allele manner. genotype enhancement conferred allele neuronal successful encoding perceptual oddballs ventral striatum allele dependent. repeated presentations oddball stimuli advantage mirrored adaptation hippocampus substantia nigra ventral tegmental carriers only. modulation enhancement perceptually salient stimuli dopaminergic hippocampal critically polymorphism promoter
|
exact_dup
|
[
"148668544"
] |
334108
|
10.1016/j.forsciint.2007.10.007
|
Examination of various SIM cards and smart card devices indicates that data may be retained in SIM card memory structures even after heating to temperatures up to 450oC, which the National Institute of Standards and Technology (NIST) has determined to be approximately the maximum average sustained temperature at desk height in a house fire. However, in many cases, and certainly for temperatures greater than 450oC, the SIM card chip has suffered structural or mechanical damage that renders simple probing or rewiring ineffective. Nevertheless, this has not necessarily affected the data, which is stored as charge in floating gates, and alternative methods for directly accessing the stored charge may be applicable
|
Retention of data in heat-damaged SIM cards and potential recovery methods
|
retention of data in heat-damaged sim cards and potential recovery methods
|
examination cards smart card devices retained card heating standards nist sustained desk house fire. certainly card chip suffered renders probing rewiring ineffective. nevertheless necessarily stored floating gates accessing stored applicable
|
exact_dup
|
[
"20363586"
] |
35088805
|
10.1007/JHEP10(2015)014
|
We stress the potential usefulness of renormalization group invariants. Especially particular combinations thereof could for instance be used as probes into patterns of supersymmetry breaking in the MSSM at inaccessibly high energies. We search for these renormalization group invariants in two systematic ways: on the one hand by making use of symmetry arguments and on the other by means of a completely automated exhaustive search through a large class of candidate invariants. At the one-loop level, we find all known invariants for the MSSM and in fact several more, and extend our results to the more constrained pMSSM and dMSSM, leading to even more invariants. Extending our search to the two-loop level we find that the number of invariants is considerably reduced
|
Renormalization group invariants in supersymmetric theories: one- and two-loop results
|
renormalization group invariants in supersymmetric theories: one- and two-loop results
|
usefulness renormalization invariants. combinations thereof probes supersymmetry breaking mssm inaccessibly energies. renormalization invariants ways arguments automated exhaustive candidate invariants. invariants mssm extend constrained pmssm dmssm invariants. extending invariants considerably
|
exact_dup
|
[
"35088970"
] |
35090194
|
10.1007/JHEP04(2015)160
|
We propose a mechanism for the natural inflation with and without modulation in the framework of type IIB string theory on toroidal orientifold or orbifold. We explicitly construct the stabilization potential of complex structure, dilaton and Kähler moduli, where one of the imaginary component of complex structure moduli becomes light which is identified as the inflaton. The inflaton potential is generated by the gaugino-condensation term which receives the one-loop threshold corrections determined by the field value of complex structure moduli and the axion decay constant of inflaton is enhanced by the inverse of one-loop factor. We also find the threshold corrections can also induce the modulations to the original scalar potential for the natural inflation. Depending on these modulations, we can predict several sizes of tensor-to-scalar ratio as well as the other cosmological observables reported by WMAP, Planck and/or BICEP2 collaborations
|
Natural inflation with and without modulations in type IIB string theory
|
natural inflation with and without modulations in type iib string theory
|
propose inflation modulation toroidal orientifold orbifold. explicitly stabilization dilaton kähler moduli imaginary moduli inflaton. inflaton gaugino condensation receives moduli axion inflaton factor. induce modulations inflation. modulations predict sizes cosmological observables wmap planck bicep collaborations
|
exact_dup
|
[
"35090105"
] |
35091516
|
10.1007/JHEP02(2015)042
|
Motivated by recent work on inverse magnetic catalysis at finite temperature, we study the quark-meson model using both dimensional regularization and a sharp cutoff. We calculate the critical temperature for the chiral transition as a function of the Yukawa coupling in the mean-field approximation varying the renormalization scale and the value of the ultraviolet cutoff. We show that the results depend sensitively on how one treats the fermionic vacuum fluctuations in the model and in particular on the regulator used. Finally, we explore a B -dependent transition temperature for the Polyakov loop potential T 0 ( B ) using the functional renormalization group. These results show that even arbitrary freedom in the function T 0 ( B ) does not allow for a decreasing chiral transition temperature as a function of B . This is in agreement with previous mean-field calculations
|
Inverse magnetic catalysis and regularization in the quark-meson model
|
inverse magnetic catalysis and regularization in the quark-meson model
|
motivated catalysis meson regularization sharp cutoff. chiral yukawa renormalization ultraviolet cutoff. sensitively treats fermionic regulator used. explore polyakov renormalization group. freedom decreasing chiral
|
exact_dup
|
[
"35091430",
"35091875"
] |
38678570
|
10.1007/s12039-013-0401-2
|
The decomposition of mixture of selected volatile organic compounds (VOCs) has been studied in a catalytic non-thermal plasma dielectric barrier discharge reactor. The VOCs mixture consisting n-hexane, cyclo-hexane and p-xylene was chosen for the present study. The decomposition characteristics of mixture of VOCs by the DBD reactor with inner electrode modified with metal oxides of Mn and Co was studied. The results indicated that the order of the removal efficiency of VOCs followed as p-xylene > cyclo-hexane > n-hexane. Among the catalytic study, MnOx/SMF (manganese oxide on sintered metal fibres electrode) shows better performance, probably due to the formation of active oxygen species by in situ decomposition of ozone on the catalyst surface. Water vapour further enhanced the performance due to the in situ formation of OH radicals. [Figure not available: see fulltext.
|
Catalytic non-thermal plasma reactor for the decomposition of a mixture of volatile organic compounds
|
catalytic non-thermal plasma reactor for the decomposition of a mixture of volatile organic compounds
|
decomposition mixture volatile vocs catalytic dielectric barrier discharge reactor. vocs mixture consisting hexane cyclo hexane xylene study. decomposition mixture vocs reactor electrode oxides studied. removal vocs xylene cyclo hexane hexane. catalytic mnox manganese oxide sintered fibres electrode probably situ decomposition ozone catalyst surface. vapour situ radicals. fulltext.
|
exact_dup
|
[
"52169805"
] |
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