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47088199
|
10.1007/978-3-662-48653-5_9
|
International audiencehe rotor-router model, also called the Propp machine, was introduced as a deterministic alternative to the random walk. In this model, a group of identical tokens are initially placed at nodes of the graph. Each node maintains a cyclic ordering of the outgoing arcs, and during consecutive turns the tokens are propagated along arcs chosen according to this ordering in round-robin fashion. The behavior of the model is fully deterministic. Yanovski et al.(2003) proved that a single rotor-router walk on any graph with m edges and diameter D stabilizes to a traversal of an Eulerian circuit on the set of all 2m directed arcs on the edge set of the graph, and that such periodic behaviour of the system is achieved after an initial transient phase of at most 2mD steps.The case of multiple parallel rotor-routers was studied experimentally, leading Yanovski et al. to the experimental observation that a system of k > 1 parallel walks also stabilizes with a period of length at most 2m steps. In this work we disprove this observation, showing that the period of parallel rotor-router walks can in fact, be superpolynomial in the size of graph. On the positive side, we provide a characterization of the periodic behavior of parallel router walks, in terms of a structural property of stable states called a subcycle decomposition. This property provides us the tools to efficiently detect whether a given system configuration corresponds to the transient or to the limit behavior of the system. Moreover, we provide polynomial upper bounds of O(m^4D^2 + mD log k) and O(m^5k^2) on the number of steps it takes for the system to stabilize. Thus, we are able to predict any future behavior of the system using an algorithm that takes polynomial time and space. In addition, we show that there exists a separation between the stabilization time of the single-walk and multiple-walk rotor-router systems, and that for some graphs the latter can be asymptotically larger even for the case of k = 2 walks
|
Limit Behavior of the Multi-Agent Rotor-Router System
|
limit behavior of the multi-agent rotor-router system
|
audiencehe rotor router propp machine deterministic walk. tokens initially placed graph. maintains cyclic ordering outgoing arcs consecutive turns tokens propagated arcs ordering round robin fashion. deterministic. yanovski proved rotor router walk stabilizes traversal eulerian circuit directed arcs transient steps.the rotor routers experimentally yanovski walks stabilizes steps. disprove rotor router walks superpolynomial graph. router walks subcycle decomposition. efficiently detect transient system. bounds stabilize. predict space. stabilization walk walk rotor router asymptotically walks
|
exact_dup
|
[
"52432025"
] |
47097369
|
10.1016/j.anihpc.2013.10.001
|
International audienceWe study the dynamics of phenotypically structured populations in environments with fluctuations. In particular, using novel arguments from the theories of Hamilton-Jacobi equations with constraints and homogenization, we obtain results about the evolution of populations in environments with time oscillations, the development of concentrations in the form of Dirac masses, the location of the dominant traits and their evolution in time. Such questions have already been studied in time homogeneous environments. More precisely we consider the dynamics of a phenotypically structured population in a changing environment under mutations and competition for a single resource. The mathematical model is a non-local parabolic equation with a periodic in time reaction term. We study the asymptotic behavior of the solutions in the limit of small diffusion and fast reaction. Under concavity assumptions on the reaction term, we prove that the solution converges to a Dirac mass whose evolution in time is driven by a Hamilton-Jacobi equation with constraint and an effective growth/death rate which is derived as a homogenization limit. We also prove that, after long-time, the population concentrates on a trait where the maximum of an effective growth rate is attained. Finally we provide an example showing that the time oscillations may lead to a strict increase of the asymptotic population size
|
Time fluctuations in a population model of adaptive dynamics
|
time fluctuations in a population model of adaptive dynamics
|
audiencewe phenotypically structured environments fluctuations. arguments hamilton jacobi homogenization environments oscillations dirac traits time. homogeneous environments. precisely phenotypically structured changing competition resource. mathematical parabolic term. asymptotic reaction. concavity assumptions converges dirac hamilton jacobi homogenization limit. concentrates trait attained. oscillations strict asymptotic
|
exact_dup
|
[
"50537821"
] |
47122277
|
10.1016/j.jhep.2006.06.020
|
Patients with familial adenomatous polyposis coli (FAP) may rarely develop hepatocellular adenoma. Here we report the case of a 37-year-old FAP woman presenting a hepatocellular adenoma after oestroprogestative oral contraception use. In this steatotic adenoma, we identified an inactivating biallelic mutation of HNF1alpha. In addition to the known germline APC mutation Q1062fs, we did not find an inactivation of the second APC allele nor an activation of the beta-catenin target genes GLUL and GPR49. Our findings contrast with two hepatocellular adenoma cases related to FAP, for which a biallelic inactivation of the APC gene was previously described. Altogether, these results suggest that benign hepatocellular carcinogenesis may be dependent on or independent of the Wnt/beta-catenin pathway in patients with FAP
|
Hepatocellular adenoma displaying a HNF1alpha inactivation in a patient with familial adenomatous polyposis coli.
|
hepatocellular adenoma displaying a hnf1alpha inactivation in a patient with familial adenomatous polyposis coli.
|
familial adenomatous polyposis coli rarely hepatocellular adenoma. woman presenting hepatocellular adenoma oestroprogestative oral contraception use. steatotic adenoma inactivating biallelic mutation alpha. germline mutation inactivation allele beta catenin glul hepatocellular adenoma biallelic inactivation described. altogether benign hepatocellular carcinogenesis beta catenin
|
exact_dup
|
[
"52200431"
] |
47290554
|
10.1080/09557571.2015.1118998
|
International audienceThis article introduces the socio-anthropological concept of international representations to examine the relationship between a civilizational rhetoric, the West European and the international politics of otherization and containment of Southeast Europe, and an essentialist and timeless bias in international relations theory, including both radical and constructivist trends. We first explore the different narrative perspectives on the Balkan wars from the beginning to the end of twentieth century. Their subsequent problematization is aimed at challenging the way how they have constructed commonplace and time-worn representations, which international society shares with different consequences in international affairs. This is a limited conception since international representations as a socio-anthropological concept are always socially, culturally and politically constructed, contested and negotiated. They do not neutrally refer to a reality in the world; they create a reality of their own. Moreover, this limited conception ignores the fact that how, by whom and in whose interest international representations are constructed is itself a form of power in international relations. Therefore, the way international representations are constructed can be problematized as an example of political and ideological projects that operate in the West as well as in the Southeast European countries that are the object of Western foreign policy
|
International representations of Balkan wars: a socio-anthropological account in international relations perspective
|
international representations of balkan wars: a socio-anthropological account in international relations perspective
|
audiencethis introduces socio anthropological representations examine civilizational rhetoric west politics otherization containment southeast europe essentialist timeless radical constructivist trends. explore narrative perspectives balkan wars beginning twentieth century. problematization aimed challenging commonplace worn representations shares consequences affairs. conception representations socio anthropological socially culturally politically contested negotiated. neutrally reality create reality own. conception ignores representations relations. representations problematized ideological projects operate west southeast foreign
|
exact_dup
|
[
"47326322"
] |
47311500
|
10.1016/j.nima.2006.10.286
|
A paraître dans NIMThe ATLAS detector is a large and complex experiment. Commissioning of the various components, both separately and together, is a challenging task which requires a methodology and a sustained and detailed plan of work. The commissioning stages of ATLAS will be described, together with an overview of results obtained during the construction and the integration so far. Once installed and functional the various parts of the detectors are operated with cosmic particles in several combinations. The performance of the detector components, both individually and in combination, has been also measured in a series of test beam data taken over the last years
|
Commissioning of the ATLAS detector and combined beam test results
|
commissioning of the atlas detector and combined beam test results
|
paraître dans nimthe atlas experiment. commissioning separately challenging methodology sustained plan work. commissioning atlas overview far. installed detectors operated cosmic combinations. individually
|
exact_dup
|
[
"152321132",
"46778257"
] |
47333699
|
10.1080/10439463.2015.1072531
|
International audienceAnalyses of security practices at borders have focused on the dematerialisation and de-territorialisation of control of individuals’ mobility. This paper explores the nature of the control the state still exercises over individuals’ mobility at national borders. It focuses on a border that is supposed to have been opened, between France and Italy, inside the Schengen Area. It is based on analysis of the practices, representations and organisation of French border police officers, beginning with the legal and organisational transformations due to implementation of the Schengen Convention at the France–Italy border. It then turns to the study of border police officers’ targeting practices, using Heyman's notion of a ‘plausible story’. Finally, it assesses the influence of deportation practices on the territoriality of the control of individuals’ mobility, as well as its effects on targeting practices. These borders are at the core of the interaction between the construction of a new, European political centre, and the affirmation of an older one, the national, political centre. This paper demonstrates that border police officers are in charge of dealing with the tension, a double bind of sorts, emerging from this interaction. National, internal borders are still a site in which the state manages individuals’ mobility
|
Policing the internal Schengen borders – managing the double bind between free movement and migration control
|
policing the internal schengen borders – managing the double bind between free movement and migration control
|
audienceanalyses security practices borders focused dematerialisation territorialisation individuals’ mobility. explores exercises individuals’ mobility borders. focuses border supposed opened schengen area. practices representations organisation french border police officers beginning legal organisational transformations schengen convention france–italy border. turns border police officers’ targeting practices heyman notion ‘plausible story’. assesses deportation practices territoriality individuals’ mobility targeting practices. borders affirmation older centre. demonstrates border police officers dealing tension bind sorts emerging interaction. borders manages individuals’ mobility
|
exact_dup
|
[
"52426171"
] |
47730981
|
10.1080/15287394.2011.618989
|
The authors thank the members of the "NeuroPrion Risk Control Group" for various comments and helpful hints. They also thank all of the interviewees who contributed information and enabled this study. Last but not least, the authors are grateful for many invaluable comments provided by three reviewers of a previous version of this article.International audienceThe so-called "TSE roadmap" was published by the European Commission on July 15, 2005. The transmissible spongiform encephalopathy (TSE) roadmap suggests relaxation of bovine spongiform encephalopathy (BSE) in cattle and other animal transmissible spongiform encephalopathies measures in the short, medium, and long term. According to the TSE roadmap, "Any relaxation of BSE measures following the scientific assessment should be initiated by an open discussion with all stakeholders and supported by a strong communication strategy" (European Commission 2005, 5). Bearing this in mind, a social scientific project as designed to (1) involve different stakeholder groups, governmental risk managers, and their scientific advisors and (2) obtain their perception of the TSE roadmap and of its implications for precautionary consumer protection in five European Union (EU) Member States. This study describes the risk perception and risk management of TSE in Europe as exemplified by the TSE roadmap. The following query guided the international comparative study: How is TSE risk perceived by four interviewed stakeholder groups in five studied countries? The risk perceptions of TSE of risk managers from the ministries in charge in Belgium, France, Germany, Italy, and the United Kingdom, as well as their scientific advisors and stakeholder groups, were determined. The stakeholder groups were from three different areas involved with TSE, including farmers, consumers, and the meat/food industry. The issue to be addressed is roadmapping an adequate instrument for stakeholder involvement and for risk decision making
|
Public risk perception of relaxation of transmissible spongiform encephalopathies (tse) measures in Europe
|
public risk perception of relaxation of transmissible spongiform encephalopathies (tse) measures in europe
|
neuroprion comments helpful hints. interviewees contributed enabled study. grateful invaluable comments reviewers article.international audiencethe roadmap commission transmissible spongiform encephalopathy roadmap relaxation bovine spongiform encephalopathy cattle transmissible spongiform encephalopathies term. roadmap relaxation initiated stakeholders commission bearing mind involve stakeholder governmental managers advisors perception roadmap precautionary consumer protection union member states. describes perception europe exemplified roadmap. query guided comparative perceived interviewed stakeholder perceptions managers ministries belgium kingdom advisors stakeholder determined. stakeholder farmers consumers meat industry. addressed roadmapping adequate instrument stakeholder involvement
|
exact_dup
|
[
"51229597",
"52690051"
] |
47785754
|
10.1007/s10640-013-9639-x
|
International audienceThis article analyzes the consequences on capital accumulation and environmental quality of environmental policies financed by public debt. A public sector of pollution abatement is financed by a tax and/or public debt. We show that if the initial capital stock is high enough, the economy monotonically converges to a long-run steady state. On the contrary, when the initial capital stock is low, the economy is relegated to an environmental-poverty trap. We also explore the implications of public policies on the trap and on the long-run stable steady state. In particular, we find that government should decrease debt and increase pollution abatement to promote capital accumulation and environmental quality at the stable long-run steady state
|
Environmental quality, public debt and economic development
|
environmental quality, public debt and economic development
|
audiencethis analyzes consequences capital accumulation policies financed debt. pollution abatement financed debt. capital stock economy monotonically converges steady state. contrary capital stock economy relegated poverty trap. explore policies trap steady state. debt pollution abatement promote capital accumulation steady
|
exact_dup
|
[
"47749227",
"52452148",
"52826766"
] |
47796101
|
10.1016/j.technovation.2011.09.003
|
Working paper serie RMT (WPS 10-11) , 28 p.International audienceThis article investigates how anchor firms sustain high tech clusters rejuvenation by means of technological pre-adaptation. Based on evidences are drawn from the comparison of the evolution of two nano-electronics clusters, i.e., Grenoble (France) and Catania (Italy) clusters which are sharing the same anchor tenant firm STMicroelectronics. Cluster rejuvenation comes from pre-adaptation of actors (scientific and technological diversity), competition amongst anchor tenant firms, competition and overlap amongst networks and the mobilization of sleeping anchors tenant organizations to renew actors and technologies. As soon as the process of specialization (asset specificity, network specificity, technology speciation) starts, it is important to stimulate pre-adaptation to avoid lock-in of the cluster on one technological trajector
|
REJUVENATING NANOCLUSTERS WITH 'SLEEPING ANCHORS': PRE-ADAPTATION AND LIFE CYCLE
|
rejuvenating nanoclusters with 'sleeping anchors': pre-adaptation and life cycle
|
serie p.international audiencethis investigates anchor firms sustain tech rejuvenation technological adaptation. evidences drawn nano electronics i.e. grenoble catania sharing anchor tenant firm stmicroelectronics. rejuvenation comes adaptation actors technological diversity competition amongst anchor tenant firms competition overlap amongst mobilization sleeping anchors tenant organizations renew actors technologies. soon specialization asset specificity specificity speciation starts stimulate adaptation avoid lock technological trajector
|
exact_dup
|
[
"47759775"
] |
47841814
|
10.1007/978-1-4020-9654-9_1
|
Serious global issues such as poverty, illness, food prices, climate changes, global market, pollution, pest adaptation and resistance, soil degradation, decreasing biodiversity and desertification can be explained by the increasing artificialization of human society. Since most issues are now intertwined they cannot be solved anymore by the classical fireman approach. In that respect, the structure of actual science and governmental institutions are probably outdated and should evolve to meet global challenges. Unexpectedly, agronomy appears as a central science to solve current societal issues because agronomists are trained to manage the input of many disciplines such as plant biology, soil science, climate sciences, ecology and chemistry
|
Sustainable agriculture as a central science to solve global society issues
|
sustainable agriculture as a central science to solve global society issues
|
serious poverty illness prices pollution pest adaptation degradation decreasing biodiversity desertification artificialization society. intertwined solved anymore fireman approach. governmental institutions probably outdated evolve meet challenges. unexpectedly agronomy solve societal agronomists trained manage disciplines ecology
|
exact_dup
|
[
"47805491"
] |
48205883
|
10.1002/jgrb.50120
|
International audienceIn order to improve discrete fracture network (DFN) models, which are increasingly required into groundwater and rock mechanics applications, we propose a new DFN modeling based on the evolution of fracture network formation--nucleation, growth, and arrest--with simplified mechanical rules. The central idea of the model relies on the mechanical role played by large fractures in stopping the growth of smaller ones. The modeling framework combines, in a time-wise approach, fracture nucleation, growth, and arrest. It yields two main regimes. Below a certain critical scale, the density distribution of fracture sizes is a power law with a scaling exponent directly derived from the growth law and nuclei properties; above the critical scale, a quasi-universal self-similar regime establishes with a self-similar scaling. The density term of the dense regime is related to the details of arrest rule and to the orientation distribution of the fractures. The DFN model, so defined, is fully consistent with field cases former studied. Unlike more usual stochastic DFN models, ours is based on a simplified description of fracture interactions, which eventually reproduces the multiscale self-similar fracture size distribution often observed and reported in the literature. The model is a potential significant step forward for further applications to groundwater flow and rock mechanical issues
|
A model of fracture nucleation, growth and arrest, and consequences for fracture density and scaling
|
a model of fracture nucleation, growth and arrest, and consequences for fracture density and scaling
|
audiencein fracture increasingly groundwater rock mechanics propose fracture nucleation arrest simplified rules. relies played fractures stopping ones. combines wise fracture nucleation arrest. regimes. fracture sizes exponent nuclei quasi universal establishes scaling. dense arrest fractures. former studied. unlike usual stochastic simplified fracture eventually reproduces multiscale fracture literature. groundwater rock
|
exact_dup
|
[
"52724927"
] |
48221912
|
10.1016/j.taap.2011.12.017
|
International audienceWe have analyzed transcriptomic, proteomic and metabolomic profiles of hepatoma cells cultivated inside a microfluidic biochip with or without acetaminophen (APAP). Without APAP, the results show an adaptive cellular response to the microfluidic environment, leading to the induction of anti-oxidative stress and cytoprotective pathways. In presence of APAP, calcium homeostasis perturbation, lipid peroxidation and cell death are observed. These effects can be attributed to APAP metabolism into its highly reactive metabolite. N-acetyl-p-benzoquinone imine (NAPQI). That toxicity pathway was confirmed by the detection of GSH-APAP, the large production of 2-hydroxybutyrate and 3-hydroxybutyrate, and methionine, cystine, and histidine consumption in the treated biochips. Those metabolites have been reported as specific biomarkers of hepatotoxicity and glutathione depletion in the literature. In addition, the integration of the metabolomic, transcriptomic and proteomic collected profiles allowed a more complete reconstruction of the APAP injury pathways. To our knowledge, this work is the first example of a global integration of microfluidic biochip data in toxicity assessment. Our results demonstrate the potential of that new approach to predictive toxicology
|
Predictive toxicology using systemic biology and liver microfluidic "on chip" approaches: Application to acetaminophen injury
|
predictive toxicology using systemic biology and liver microfluidic "on chip" approaches: application to acetaminophen injury
|
audiencewe transcriptomic proteomic metabolomic hepatoma cultivated microfluidic biochip acetaminophen apap apap adaptive microfluidic oxidative cytoprotective pathways. apap calcium homeostasis perturbation peroxidation observed. attributed apap metabolism reactive metabolite. acetyl benzoquinone imine napqi toxicity confirmed apap hydroxybutyrate hydroxybutyrate methionine cystine histidine biochips. metabolites biomarkers hepatotoxicity glutathione depletion literature. metabolomic transcriptomic proteomic reconstruction apap injury pathways. microfluidic biochip toxicity assessment. predictive toxicology
|
exact_dup
|
[
"52315528",
"52669135"
] |
48242686
|
10.1007/s00208-011-0648-1
|
International audienceWe describe a method to show short time uniqueness results for viscosity solutions of general nonlocal and non-monotone second-order geometric equations arising in front propagation problems. Our method is based on some lower gradient bounds for the solution. These estimates are crucial to obtain regularity properties of the front, which allow to deal with nonlocal terms in the equations. Applications to short time uniqueness results for the initial value problems for dislocation type equations, asymptotic equations of a FitzHugh-Nagumo type system and equations depending on the Lebesgue measure of the fronts are presented
|
Short Time Uniqueness Results for Solutions of Nonlocal and Non-monotone Geometric Equations
|
short time uniqueness results for solutions of nonlocal and non-monotone geometric equations
|
audiencewe uniqueness viscosity nonlocal monotone geometric arising front propagation problems. bounds solution. crucial regularity front deal nonlocal equations. uniqueness dislocation asymptotic fitzhugh nagumo lebesgue fronts
|
exact_dup
|
[
"54025635"
] |
49299044
|
10.1007/s10844-005-0266-z
|
International audienceAssociation rule extraction from operational datasets often produces several tens of thousands, and even millions, of association rules. Moreover, many of these rules are redundant and thus useless. Using a semantic based on the closure of the Galois connection, we define a condensed representation for association rules. This representation is characterized by frequent closed itemsets and their generators. It contains the non-redundant association rules having minimal antecedent and maximal consequent, called min-max association rules. We think that these rules are the most relevant since they are the most general non-redundant association rules. Furthermore, this representation is a basis, i.e., a generating set for all association rules, their supports and their confidences, and all of them can be retrieved needless accessing the data. We introduce algorithms for extracting this basis and for reconstructing all association rules. Results of experiments carried out on real datasets show the usefulness of this approach. In order to generate this basis when an algorithm for extracting frequent itemsets—such as Apriori for instance—is used, we also present an algorithm for deriving frequent closed itemsets and their generators from frequent itemsets without using the dataset
|
Generating a condensed representation for association rules
|
generating a condensed representation for association rules
|
audienceassociation extraction operational datasets produces tens thousands millions rules. redundant useless. semantic closure galois connection condensed rules. frequent itemsets generators. redundant antecedent maximal consequent rules. think redundant rules. i.e. generating supports confidences retrieved needless accessing data. extracting reconstructing rules. datasets usefulness approach. extracting frequent itemsets—such apriori instance—is deriving frequent itemsets generators frequent itemsets dataset
|
exact_dup
|
[
"52461043",
"52790997",
"54026362"
] |
51216913
|
10.1007/978-3-642-22450-8_19
|
International audienceA substitution network is a rapidly deployable backup wire- less solution to quickly react to network topology changes due to failures or to ash crowd e ects on the base network. Unlike other ad hoc and mesh solutions, a substitution network does not attempt to provide new services to customers but rather to restore and maintain at least some of the services available before the failure. Furthermore, a substitution net- work is not deployed directly for customers but to help the base network provide services to the customers. Therefore, a substitution network is not, by de nition, a stand-alone network. In this paper, we describe the quality of service architecture for substitution networks and discuss pro- visioning, maintenance, and adaptation of QoS inside and between the base network and the substitution network
|
Promoting Quality of Service in Substitution Networks with Controlled Mobility
|
promoting quality of service in substitution networks with controlled mobility
|
audiencea substitution rapidly deployable backup wire quickly react topology failures crowd ects network. unlike mesh substitution attempt customers restore maintain failure. substitution deployed customers customers. substitution nition stand network. architecture substitution visioning maintenance adaptation substitution
|
exact_dup
|
[
"52318443"
] |
51932936
|
10.1051/0004-6361/201527724
|
International audienceWe present SELFI, the Source Emission Line FInder, a new Bayesian method optimized for detection of faint galaxies in Multi Unit Spectroscopic Explorer (MUSE) deep fields. MUSE is the new panoramic integral field spectrograph at the Very Large Telescope (VLT) that has unique capabilities for spectroscopic investigation of the deep sky. It has provided data cubes with 324 million voxels over a single 1 arcmin2 field of view. To address the challenge of faint-galaxy detection in these large data cubes, we developed a new method that processes 3D data either for modeling or for estimation and extraction of source configurations. This object-based approach yields a natural sparse representation of the sources in massive data fields, such as MUSE data cubes. In the Bayesian framework, the parameters that describe the observed sources are considered random variables. The Bayesian model leads to a general and robust algorithm where the parameters are estimated in a fully data-driven way. This detection algorithm was applied to the MUSE observation of Hubble Deep Field-South. With 27 h total integration time, these observations provide a catalog of 189 sources of various categories and with secured redshift. The algorithm retrieved 91% of the galaxies with only 9% false detection. This method also allowed the discovery of three new Lyα emitters and one [OII] emitter, all without any Hubble Space Telescope counterpart. We analyzed the reasons for failure for some targets, and found that the most important limitation of the method is when faint sources are located in the vicinity of bright spatially resolved galaxies that cannot be approximated by the Sérsic elliptical profile
|
SELFI: an object-based, Bayesian method for faint emission line source detection in MUSE deep field data cubes
|
selfi: an object-based, bayesian method for faint emission line source detection in muse deep field data cubes
|
audiencewe selfi finder bayesian optimized faint spectroscopic explorer muse fields. muse panoramic spectrograph telescope capabilities spectroscopic sky. cubes million voxels arcmin view. challenge faint cubes extraction configurations. sparse massive muse cubes. bayesian variables. bayesian robust way. muse hubble south. catalog categories secured redshift. retrieved false detection. discovery emitters emitter hubble telescope counterpart. reasons targets limitation faint vicinity bright spatially resolved approximated sérsic elliptical
|
exact_dup
|
[
"52295302",
"52710383"
] |
52168972
|
10.1007/s12034-011-0079-3
|
The magnetic and transport properties of the compounds Nd0·5Sr0·5Mn 1−x Co x O3 (x = 0·1, 0·3 and 0·5), synthesized by citrate–gel route have been investigated. The spin transition in cobaltates at low temperatures affects the magnetic as well as transport properties. The irreversibility behaviour between the zero-field cooled (ZFC) and field cooled (FC) magnetization as a function of temperature becomes stronger with increasing Co content. This is understood on the basis of glassy behaviour, which becomes more robust with increasing Co substitution. The non-saturating M–H behaviour indicates strong magnetic inhomogeneities which may cause the magnetic phase separation at the nanoscopic length scale. The double exchange interaction is stronger between Mn3 + –O2 − –Mn4 + as compared to Co3 + –O2 − –Co4 + pairs. Co-substitution suppresses the double exchange which will lead to cluster/spin glass like behaviour as well as semiconducting features due to localization of charge carriers (mobile eg electrons)
|
Effect of cobalt substitution on magnetic and transport properties of Nd0·5Sr0·5Mn1−x Co x O3 (x = 0·1, 0·3 and 0·5)
|
effect of cobalt substitution on magnetic and transport properties of nd0·5sr0·5mn1−x co x o3 (x = 0·1, 0·3 and 0·5)
|
synthesized citrate–gel route investigated. cobaltates affects properties. irreversibility cooled cooled magnetization stronger content. understood glassy robust substitution. saturating inhomogeneities nanoscopic scale. stronger pairs. substitution suppresses glass semiconducting localization carriers mobile
|
exact_dup
|
[
"38677736"
] |
52169190
|
10.1016/j.ssc.2012.08.007
|
The polycrystalline Bi 1-xHo xFeO 3 (x=0, 0.05, 0.1) compounds were synthesized by conventional solid-state route. Rietveld refinement revealed that all the compounds were stabilized in rhombohedral structure with R3c (IUCr No. 161) space group. Room temperature magnetic measurements revealed that Ho substitution induces ferromagnetism and improves the magnetic properties of BiFeO 3. A competing ferro and anti-ferro magnetic interaction was observed in these compounds. Temperature variation of complex impedance studies revealed that electrical properties are improved with the Ho substitution. The ac conductivity found to obey universal power law and showed the negative temperature coefficient of resistance character. Correlated barrier hopping model (CBH) was employed to explain the frequency and temperature dependence of ac conductivity and the mechanism of transport in the material BFO and Ho substituted BFO. Density of states near Fermi level was calculated by using the ac conductivity data. © 2012 Elsevier Ltd
|
Study of structural, magnetic and electrical properties on Ho-substituted BiFeO 3
|
study of structural, magnetic and electrical properties on ho-substituted bifeo 3
|
polycrystalline xfeo synthesized route. rietveld refinement stabilized rhombohedral iucr group. room substitution induces ferromagnetism improves bifeo competing ferro ferro compounds. impedance electrical substitution. conductivity obey universal character. barrier hopping conductivity substituted bfo. fermi conductivity data.
|
exact_dup
|
[
"38677955"
] |
52193360
|
10.1007/978-3-319-08590-6_13
|
International audienceThis paper introduces ConQuR-Bio which aims at assisting scientists when they query public biological databases. Various reformu-lations of the user query are generated using medical terminologies. Such alternative reformulations are then used to rank the query results using a new consensus ranking strategy. The originality of our approach thus lies in using consensus ranking techniques within the context of query reformulation. The ConQuR-Bio system is able to query the Entrez-Gene NCBI database. Our experiments demonstrate the benefit of using ConQuR-Bio compared to what is currently provided to users. ConQuR-Bio is available to the bioinformatics community at http://conqur-bio.lri.fr
|
ConQuR-Bio: Consensus Ranking with Query Reformulation for Biological Data
|
conqur-bio: consensus ranking with query reformulation for biological data
|
audiencethis introduces conqur aims assisting scientists query databases. reformu lations query terminologies. reformulations query consensus ranking strategy. originality lies consensus ranking query reformulation. conqur query entrez ncbi database. benefit conqur users. conqur bioinformatics conqur
|
exact_dup
|
[
"47091398",
"52898662"
] |
52194832
|
10.1007/s10456-012-9290-0
|
International audienceInflammatory neovascularization, such as choroidal neovascularization (CNV), occur in the presence of Notch expressing macrophages. DLL4s anti-angiogenic effect on endothelial cells (EC) has been widely recognized, but its influence on Notch signaling on macrophages and its overall effect in inflammatory neovascularization is not well understood. We identified macrophages and ECs as the main Notch 1 and Notch 4 expressing cells in CNV. A soluble fraction spanning Ser28-Pro525 of the murine extracellular DLL4 domain (sDLL4/28-525) activated the Notch pathway, as it induces Notch target genes in macrophages and ECs and inhibited EC proliferation and vascular sprouting in aortic rings. In contrast, sDLL4/28-525 increased pro-angiogenic VEGF, and IL-1β expression in macrophages responsible for increased vascular sprouting observed in aortic rings incubated in conditioned media from sDLL4/28-525 stimulated macrophages. In vivo, Dll4(+/-) mice developed significantly more CNV and sDLL4/28-525 injections inhibited CNV in Dll4(+/-) CD1 mice. Similarly, sDLL4/28-525 inhibited CNV in C57Bl6 and its effect was reversed by a γ-secretase inhibitor that blocks Notch signaling. The inhibition occurred despite increased VEGF, IL-1β expression in infiltrating inflammatory macrophages in sDLL4/28-525 treated mice and might be due to direct inhibition of EC proliferation in laser-induced CNV as demonstrated by EdU labelling in vivo. In conclusion, Notch activation on macrophages and ECs leads to opposing effects in inflammatory neovascularization in situations such as CNV
|
Delta-like 4 inhibits choroidal neovascularization despite opposing effects on vascular endothelium and macrophages.
:
DLL4's opposing effects in choroidal neovascularization
|
delta-like 4 inhibits choroidal neovascularization despite opposing effects on vascular endothelium and macrophages. : dll4's opposing effects in choroidal neovascularization
|
audienceinflammatory neovascularization choroidal neovascularization notch expressing macrophages. angiogenic endothelial widely recognized notch macrophages inflammatory neovascularization understood. macrophages notch notch expressing cnv. soluble spanning murine extracellular sdll notch induces notch macrophages inhibited proliferation vascular sprouting aortic rings. sdll angiogenic vegf macrophages vascular sprouting aortic rings incubated conditioned sdll stimulated macrophages. sdll injections inhibited mice. sdll inhibited reversed secretase inhibitor blocks notch signaling. occurred vegf infiltrating inflammatory macrophages sdll proliferation labelling vivo. notch macrophages opposing inflammatory neovascularization situations
|
exact_dup
|
[
"47096670",
"51964461",
"52647163",
"52683938"
] |
52298699
|
10.1016/j.dam.2015.02.006
|
International audienceWe define a new graph operator, called the weak-factor graph, which comes from the context of complex network modelling. The weak-factor operator is close to the well-known clique-graph operator but it rather operates in terms of bicliques in a multipartite graph. We address the problem of the termination of the series of graphs obtained by iteratively applying the weak-factor operator starting from a given input graph. As for the clique-graph operator, it turns out that some graphs give rise to series that do not terminate. Therefore, we design a slight variation of the weak-factor operator, called clean-factor, and prove that its associated series terminates for all input graphs. In addition, we show that the multipartite graph on which the series terminates has a very nice combinatorial structure: we exhibit a bijection between its vertices and the chains of the inclusion order on the intersections of the maximal cliques of the input graph
|
On the termination of some biclique operators on multipartite graphs
|
on the termination of some biclique operators on multipartite graphs
|
audiencewe comes modelling. clique operates bicliques multipartite graph. termination iteratively graph. clique turns terminate. slight clean terminates graphs. multipartite terminates nice combinatorial exhibit bijection chains inclusion intersections maximal cliques
|
exact_dup
|
[
"51939400"
] |
52320265
|
10.1088/1751-8113/42/21/214031
|
10 pagesInternational audienceWe consider the hydrogen quantum plasma in the Saha regime, where it almost reduces to a partially ionized atomic gas. We briefly review the construction of systematic expansions of thermodynamical functions beyond Saha theory, which describes an ideal mixture of ionized protons, ionized electrons and hydrogen atoms in their ground-state. Thanks to the existence of rigorous results, we first identify the simultaneous low-temperature and low-density limit in which Saha theory becomes asymptotically exact. Then, we argue that the screened cluster representation is well suited for calculating corrections, since that formalism accounts for all screening and recombination phenomena at work in a more tractable way than other many-body methods. We sketch the corresponding diagrammatical analysis, which leads to an exact asymptotic expansion for the equation of state. That scaled low-temperature expansion improves the analytical knowledge of the phase diagram. It also provides reliable numerical values over a rather wide range of temperatures and densities, as confirmed by comparisons to quantum Monte Carlo data
|
Exact aymptotic expansions for the thermodynamics of hydrogen gas in the Saha regime
|
exact aymptotic expansions for the thermodynamics of hydrogen gas in the saha regime
|
pagesinternational audiencewe saha reduces partially ionized gas. briefly expansions thermodynamical saha describes ideal mixture ionized protons ionized state. thanks rigorous simultaneous saha asymptotically exact. argue screened suited calculating formalism accounts screening recombination phenomena tractable methods. sketch diagrammatical asymptotic state. scaled improves diagram. reliable densities confirmed comparisons monte carlo
|
exact_dup
|
[
"52737317",
"54040374"
] |
52421032
|
10.1007/s00161-016-0531-0
|
International audienceThis work is dedicated to the modeling of gas-liquid flows in pipes. As a first step, a new two-layer model is proposed to deal with the stratified regime. The starting point is the isentropic Euler set of equations for each phase where the classical hydrostatic assumption is made for the liquid. The main difference with the models issued from the classical literature is that the liquid as well as the gas is assumed compressible. In that framework, an averaging process results in a five-equation system where the hydrostatic constraint has been used to define the interfacial pressure. Closure laws for the interfacial velocity and source terms such as mass and momentum transfer are provided following an entropy inequality. The resulting model is hyperbolic with non-conservative terms. Therefore, regarding the homogeneous part of the system, the definition and uniqueness of jump conditions is studied carefully and acquired. The nature of characteristic fields and the corresponding Riemann invariants are also detailed. Thus, one may build analytical solutions for the Riemann problem. In addition, positivity is obtained for heights and densities. The overall derivation deals with gas-liquid flows through rectangular channels, circular pipes with variable cross section and includes vapor-liquid flows
|
A compressible two-layer model for transient gas–liquid flows in pipes
|
a compressible two-layer model for transient gas–liquid flows in pipes
|
audiencethis dedicated flows pipes. deal stratified regime. isentropic euler hydrostatic liquid. issued compressible. averaging hydrostatic interfacial pressure. closure laws interfacial inequality. hyperbolic conservative terms. homogeneous uniqueness jump carefully acquired. riemann invariants detailed. build riemann problem. positivity heights densities. derivation deals flows rectangular circular pipes vapor flows
|
exact_dup
|
[
"47268387",
"51929375"
] |
52422571
|
10.1002/zamm.201600208
|
International audienceWe investigate numerically the vibrational behavior of a simple finite element model that stands for an elastic container filled with an inviscid fluid. The underlying mathematical model is detailed and its spectra is characterized. The finite element method relies upon the added-mass formulation of Morand and Ohayon. A parametric study allows to characterize the system's response to dimensionless parameters in terms of eigenfrequencies. Then an insight into the mode shapes is provided, with a discussion on the presence and the behavior of singular modes caused by specific boundary conditions in the fluid
|
Numerical study of the vibrations of an elastic container filled with an inviscid fluid
|
numerical study of the vibrations of an elastic container filled with an inviscid fluid
|
audiencewe numerically vibrational stands elastic container filled inviscid fluid. mathematical characterized. relies formulation morand ohayon. parametric characterize dimensionless eigenfrequencies. insight shapes singular
|
exact_dup
|
[
"51930807",
"54030011"
] |
52626480
|
10.1016/j.ecolecon.2013.12.010
|
International audienceThe efficiency of unilateral climate policies may be hampered by carbon leakage and competitiveness losses. A widely discussed policy option to reduce leakage and protect competitiveness of heavy industries is to impose border carbon adjustments (BCAs). The estimation of carbon leakage as well as the assessment of different policy options led to a substantial body of literature in energy-economic modeling. In order to give a quantitative overview on the most recent research of the topic, we conduct a meta-analysis on 25 studies, altogether providing 310 estimates of carbon leakage ratio according to different assumptions and models. The typical range of carbon leakage estimates are from 5% to 25% (mean 14%) without policy and from −5% to 15% (mean 6%) with BCAs. A meta-regression analysis is performed to further investigate the impact of different assumptions on the leakage estimates. The decrease of the leakage ratio with the size of the coalition is confirmed and quantified. Among the BCA options, the extension of BCAs to all sectors and the inclusion of export rebates are the most efficient features in the meta-regression model to reduce the leakage ratio. All other parameters being constant, BCAs reduce leakage ratio by 6 percentage points
|
Would border carbon adjustments prevent carbon leakage and heavy industry competitiveness losses? Insights from a meta-analysis of recent economic studies
|
would border carbon adjustments prevent carbon leakage and heavy industry competitiveness losses? insights from a meta-analysis of recent economic studies
|
audiencethe unilateral policies hampered leakage competitiveness losses. widely option leakage protect competitiveness industries impose border adjustments bcas leakage options substantial modeling. overview topic conduct meta altogether leakage assumptions models. leakage bcas. meta assumptions leakage estimates. leakage coalition confirmed quantified. options bcas sectors inclusion export rebates meta leakage ratio. bcas leakage
|
exact_dup
|
[
"48322073"
] |
52631591
|
10.1016/j.agwat.2008.10.011
|
Crop models are useful tools for integrating knowledge of biophysical processes governing the plant-soil-atmosphere system. But few of them are easily usable for water and yield management especially under specific cropping systems such as direct seeding. Direct seeding into mulch (DSM) is an alternative for conventional tillage (CT). DSM modifies soil properties and creates a different microclimate from CT. So that, we should consequently consider these new conditions to develop or to adapt models. The aim of this study was to calibrate and validate the PILOTE [Mailhol, J.C., Olufayo, A.A., Ruelle, P., 1997. Sorghum and sunflower evapotranspiration and yield from simulated leaf area index. Agric. Water Manag. 35, 167-182; Mailhol, J.C., Zaïri A., Slatni A., Ben Nouma, B., El Amami, H., 2004. Analysis of irrigation systems and irrigation strategies for durum wheat in Tunisia. Agric. Water Manag. 70, 19-37], an operative crop model based on the leaf area index (LAI) simulation, for corn and durum wheat in both DSM and CT systems in Mediterranean climate. In DSM case, simple model modifications were proposed. This modified PILOTE version accounts for mulch and its impact on soil evaporation. In addition root progression was modified to account for lower soil temperatures in DSM for winter crops. PILOTE was calibrated and validated against field data collected from a 7-year trial at the experimental station of Lavalette (SE of France). Results indicated that PILOTE satisfactorily simulates LAI, soil water reserve (SWR), grain yield, and dry matter yield in both systems. The minimum coefficient of efficiency for SWR was 0.90. This new version of PILOTE can thus be used to manage water and yield under CT and DSM systems in Mediterranean climate
|
Adapting PILOTE model for water and yield management under direct seeding system: The case of corn and durum wheat in a Mediterranean context
|
adapting pilote model for water and yield management under direct seeding system: the case of corn and durum wheat in a mediterranean context
|
crop integrating biophysical governing atmosphere system. usable cropping seeding. seeding mulch tillage modifies creates microclimate adapt models. calibrate validate pilote mailhol j.c. olufayo a.a. ruelle sorghum sunflower evapotranspiration leaf index. agric. manag. mailhol j.c. zaïri slatni nouma amami irrigation irrigation durum wheat tunisia. agric. manag. operative crop leaf corn durum wheat mediterranean climate. modifications proposed. pilote accounts mulch evaporation. progression winter crops. pilote calibrated validated station lavalette pilote satisfactorily simulates reserve grain systems. pilote manage mediterranean
|
exact_dup
|
[
"47800699",
"47836809"
] |
52640709
|
10.1051/proc/201445018
|
International audienceMany physical phenomena are modeled by parametrized PDEs. The poor knowledge on the involved parameters is often one of the numerous sources of uncertainties on these models. Some of these parameters can be estimated, with the use of real world data. The aim of this mini-symposium is to introduce some of the various tools from both statistical and numerical communities to deal with this issue. Parametric and non-parametric approaches are developed in this paper. Some of the estimation procedures require many evaluations of the initial model. Some interpolation tools and some greedy algorithms for model reduction are therefore also presented, in order to reduce time needed for running the model
|
Statistical Inference for Partial Differential Equations
|
statistical inference for partial differential equations
|
audiencemany phenomena modeled parametrized pdes. numerous models. data. mini symposium communities deal issue. parametric parametric paper. evaluations model. interpolation greedy running
|
exact_dup
|
[
"48323038",
"51944777",
"52302019"
] |
52681394
|
10.1051/m2an/2011069
|
International audienceIn the present work we investigate the numerical simulation of liquid-vapor phase change in compressible flows. Each phase is modeled as a compressible fluid equipped with its own Equation of State (EOS). We suppose that inter-phase equilibrium processes in the medium operate at a short time-scale compared to the other physical phenomena such as convection or thermal diffusion. This assumption provides an implicit definition of an equilibrium EOS for the two-phase medium. Within this framework, mass transfer is the result of local and instantaneous equilibria between both phases. The overall model is strictly hyperbolic. We examine properties of the equilibrium EOS and we propose a discretization strategy based on a Finite-Volume relaxation method. This method allows to cope with the implicit definition of the equilibrium EOS, even when the model involves complex EOS's for the pure phases. We present two-dimensional numerical simulations that shows that the model is able to reproduce mechanism such as phase disappearance and nucleation
|
Modelling and Simulation of Liquid-Vapor Phase Transition in Compressible Flows Based on Thermodynamical Equilibrium.
|
modelling and simulation of liquid-vapor phase transition in compressible flows based on thermodynamical equilibrium.
|
audiencein vapor compressible flows. modeled compressible equipped operate phenomena convection diffusion. implicit medium. instantaneous equilibria phases. strictly hyperbolic. examine propose discretization relaxation method. cope implicit involves phases. reproduce disappearance nucleation
|
exact_dup
|
[
"52900100"
] |
52698065
|
10.1063/1.3076784
|
International audienceIn mid-2009 a notable upgrade of the H.E.S.S. telescope system will take place: a new telescope with a 600 m2 mirror area and very-high-resolution camera (0.07°) will be positioned at the centre of the present configuration, with the aim of lowering the threshold and enhance its sensitivity in the 100 GeV to several TeV energy range. HESS-II will permit the investigation of the lower energy gamma-ray spectra in various cosmic accelerators, giving information on the origin of the gamma-rays observed, and will detect AGNs with a redshift greater than 0.2 (being less affected by absorption by Extragalactic Background Light-EBL-in this energy range) and will search for new classes of very high energy gamma-ray emitters (pulsars, microquasars, GRB, and dark matter candidates)
|
HESS-II reconstruction strategy and performance in the low-energy (20-150 GeV) domain
|
hess-ii reconstruction strategy and performance in the low-energy (20-150 gev) domain
|
audiencein notable upgrade h.e.s.s. telescope telescope mirror camera positioned lowering enhance range. hess permit gamma cosmic accelerators giving gamma rays detect agns extragalactic gamma emitters pulsars microquasars candidates
|
exact_dup
|
[
"46772841",
"47112929",
"47304246",
"152156783",
"52663225"
] |
52700697
|
10.1095/biolreprod.104.037986
|
Expression of the nonclassical HLA class I antigen, HLA-G, is associated with immune tolerance in view of its role in maintaining the fetus in utero, allowing tumor escape, and favoring graft acceptance. Expressed on invasive trophoblast cells, HLA-G molecules bind inhibitory receptors on maternal T lymphocytes and NK cells, thereby blocking their cytolytic activities and protecting the fetus from maternal immune system attack. The HLA-G gene consists of 15 alleles, including a null allele, HLA-G*0105N. HLA-G*0105N presents a single base deletion, preventing translation of both membrane-bound (HLA-G1) and full-length soluble isoforms (HLA-G5) as well as of the spliced HLA-G4 isoform. The identification of healthy subjects homozygous for this HLA-G null allele suggests that the HLA-G*0105N allele may generate other HLA-G isoforms, such as membrane-bound HLA-G2 and -G3 and the soluble HLA-G6 and -G7 proteins, which may substitute for HLA-G1 and -G5, thus assuming the immune tolerogeneic function of HLA-G. To investigate this point, we cloned genomic HLA-G*0105N DNA and transfected it into an HLA-class I-positive human cell line. The results obtained indicated that HLA-G proteins were indeed present in HLA-G*0105N-transfected cells and were able to protect against NK cell lysis. These findings emphasize the role of the other HLA-G isoforms as immune tolerogeneic molecules that may also contribute to maternal tolerance of the semiallogenic fetus as well as tumor escape and other types of allogeneic tissue acceptance
|
HLA-G*0105N null allele encodes functional HLA-G isoforms.
|
hla-g*0105n null allele encodes functional hla-g isoforms.
|
nonclassical antigen immune tolerance maintaining fetus utero allowing escape favoring graft acceptance. invasive trophoblast bind inhibitory receptors maternal lymphocytes thereby blocking cytolytic protecting fetus maternal immune attack. alleles allele presents deletion preventing translation soluble isoforms spliced isoform. healthy homozygous allele allele isoforms soluble substitute immune tolerogeneic cloned genomic transfected line. transfected protect lysis. emphasize isoforms immune tolerogeneic maternal tolerance semiallogenic fetus escape allogeneic acceptance
|
exact_dup
|
[
"47117123"
] |
52709176
|
10.1073/pnas.1009383108
|
International audienceAmong the deep-sea hydrothermal vent sites discovered in thepast 30 years, Lost City on the Mid-Atlantic Ridge (MAR) isremarkable both for its alkaline fluids derived from mantle rockserpentinization and the spectacular seafloor carbonate chimneysprecipitated from these fluids. Despite high concentrations ofreduced chemicals in the fluids, this unique example of a serpentinite-hosted hydrothermal system currently lacks chemosyntheticassemblages dominated by large animals typical of high-temperaturevent sites. Here we report abundant specimens of chemosymbioticmussels, associated with gastropods and chemosymbioticclams, in approximately 100 kyr old Lost City-like carbonates fromthe MAR close to the Rainbow site (36 °N). Our finding shows thatserpentinization-related fluids, unaffected by high-temperaturehydrothermal circulation, can occur on-axis and are able to sustainhigh-biomass communities. The widespread occurrence of seafloorultramafic rocks linked to likely long-range dispersion of ventspecies therefore offers considerably more ecospace for chemosyntheticfauna in the oceans than previously suppose
|
Fossil evidence for serpentinization fluids fueling chemosynthetic assemblages
|
fossil evidence for serpentinization fluids fueling chemosynthetic assemblages
|
audienceamong hydrothermal vent discovered thepast lost city atlantic ridge isremarkable alkaline fluids mantle rockserpentinization spectacular seafloor carbonate chimneysprecipitated fluids. ofreduced chemicals fluids serpentinite hosted hydrothermal lacks chemosyntheticassemblages dominated temperaturevent sites. abundant specimens chemosymbioticmussels gastropods chemosymbioticclams lost city carbonates fromthe rainbow thatserpentinization fluids unaffected temperaturehydrothermal circulation sustainhigh biomass communities. widespread occurrence seafloorultramafic rocks ventspecies offers considerably ecospace chemosyntheticfauna oceans
|
exact_dup
|
[
"47082227"
] |
52709389
|
10.1016/j.epsl.2015.10.013
|
International audienceThis is a follow-up study of a work by Kramers et al. (2013) on a very unusual diamond-rich rock fragment found in the area of south west Egypt in the south-western side of the Libyan Desert Glass strewn field. This pebble, called Hypatia, is composed of almost pure carbon. Transmission Electron Microscopy (TEM) and X-ray diffraction (XRD) results reveal that Hypatia is mainly made of defect-rich diamond containing lonsdaleite and multipledeformation bands. These characteristics are compatible with an impact origin on Earth and/or in space. We also analyzed concentrations and isotopic compositions of all five noble gases and nitrogen in several ~mg sized Hypatia samples. These data confirm the conclusion by Kramers et al. (2013) that Hypatia is extra-terrestrial. The sample is relatively rich in trapped noble gases with an isotopic composition being close to the Q component found in many types of meteorites. 40Ar/36Ar ratios in individual steps are as low as 0.4 ± 0.3. Cosmicray produced "cosmogenic" 21Ne is present in concentrations corresponding to a nominal cosmic-ray exposure (CRE) age of roughly 0.1 Myr if produced in a typical meter-sized meteoroid. Such an atypically low nominal CRE age suggests high shielding in a considerably larger body. In addition to the Xe-Q composition, an excess of radiogenic 129Xe (from thedecay of short-lived radioactive 129I) is observed (129Xe/132Xe = 1.18 +/- 0.03). Two isotopically distinct N components are present, an isotopically heavy component (δ15N ~ +20‰) released at low temperatures and a major isotopically light component (δ15N ~ -10‰) at higher temperatures. This disequilibrium in N suggests that the diamonds in Hypatia were formed in space rather than upon impact on Earth (δ15Natm = 0 ‰). All our dataare broadly consistent with concentrations and isotopic compositions of noble gases in at least three different types of carbon-rich meteoritic materials: carbon-rich veins in ureilites, graphite in acapulcoites/lodranites and graphite nodules in iron meteorites. However, Hypatia does not seem to be directly related to any of these materials, but may have sampled a similar cosmochemical reservoir. Our study does not confirm the presence of exotic noble gases (e.g. G component) that led Kramers et al. (2013) to propose that Hypatia is a remnant of a comet nucleus that impacted the Earth
|
A comprehensive study of noble gases and nitrogen in “Hypatia”, a diamond-rich pebble from SW Egypt
|
a comprehensive study of noble gases and nitrogen in “hypatia”, a diamond-rich pebble from sw egypt
|
audiencethis kramers unusual diamond rock fragment west egypt libyan desert glass strewn field. pebble hypatia composed carbon. microscopy diffraction reveal hypatia defect diamond lonsdaleite multipledeformation bands. compatible earth space. isotopic compositions noble gases nitrogen sized hypatia samples. confirm kramers hypatia extra terrestrial. trapped noble gases isotopic meteorites. cosmicray cosmogenic nominal cosmic roughly meter sized meteoroid. atypically nominal shielding considerably body. excess radiogenic thedecay lived radioactive isotopically isotopically released isotopically temperatures. disequilibrium diamonds hypatia earth natm dataare broadly isotopic compositions noble gases meteoritic veins ureilites graphite acapulcoites lodranites graphite nodules iron meteorites. hypatia seem sampled cosmochemical reservoir. confirm exotic noble gases e.g. kramers propose hypatia remnant comet nucleus impacted earth
|
exact_dup
|
[
"47082447"
] |
52712777
|
10.1088/1748-9326/10/12/124014
|
16 pagesInternational audienceThe challenge of estimating the potential impacts of climate change has led to an increasing use of dynamical downscaling to produce fine spatial-scale climate projections for impact assessments. In this work, we analyze if and to what extent the bias in the simulated crop yield can be reduced by using the Weather Research and Forecasting (WRF) regional climate model to downscale ERA-Interim (European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis) rainfall and radiation data. Then, we evaluate the uncertainties resulting from both the choice of the physical parameterizations of the WRF model and its internal variability. Impact assessments were performed at two sites in Sub-Saharan Africa and by using two crop models to simulate Niger pearl millet and Benin maize yields. We find that the use of the WRF model to downscale ERA-Interim climate data generally reduces the bias in the simulated crop yield, yet this reduction in bias strongly depends on the choices in the model setup. Among the physical parameterizations considered, we show that the choice of the land surface model (LSM) is of primary importance. When there is no coupling with a LSM, or when the LSM is too simplistic, the simulated precipitation and then the simulated yield are null, or respectively very low; therefore, coupling with a LSM is necessary. The convective scheme is the second most influential scheme for yield simulation, followed by the shortwave radiation scheme. The uncertainties related to the internal variability of the WRF model are also significant and reach up to 30% of the simulated yields. These results suggest that regional models need to be used more carefully in order to improve the reliability of impact assessments
|
Errors and uncertainties introduced by a regional climate model in climate impact assessments: example of crop yield simulations in West Africa
|
errors and uncertainties introduced by a regional climate model in climate impact assessments: example of crop yield simulations in west africa
|
pagesinternational audiencethe challenge estimating impacts downscaling fine projections assessments. analyze crop weather forecasting downscale interim weather forecasts ecmwf rainfall data. parameterizations variability. assessments saharan africa crop simulate niger pearl millet benin maize yields. downscale interim reduces crop choices setup. parameterizations importance. simplistic precipitation necessary. convective influential shortwave scheme. yields. carefully reliability assessments
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exact_dup
|
[
"54824973"
] |
52718617
|
10.1017/jfm.2013.412
|
International audienceThe stability of axisymmetric vortices to inertial perturbations is investigated by means of linear stability analysis, taking into account stratification, vertical eddy viscosity, as well as finite depth of the flow. We consider different types of circular barotropic vortices in a linearly stratified shallow layer confined with rigid lids. For the simplest case of the Rankine vortex we develop an asymptotic analytic dispersion relation and a marginal stability criterion, which compares well with numerical results. This is a further generalization to the well-known generalized Rayleigh criterion, which is only valid for non-dissipative and non-stratified eddies. Unlike the Rayleigh criterion, it predicts that intense anticyclones may be stable even with a core region of negative absolute vorticity, and that the dissipation and stratification work together to stabilize the flow. Numerical analysis reveals that the stability diagrams for various types of vortices are almost identical in the Rossby, Burger and Ekman parameter space. This allows extension of our analytical solutions for the Rankine vortex to a wide variety of vortices. Furthermore, we show that a more suitable parameter for the intensity of the vortex is the vortex Rossby number, while for the inviscid case it is the local normalized vorticity. These predictions are in agreement with laboratory experiments presented in part 2
|
Inertial instability of intense stratified anticyclones. Part 1. Generalized stability criterion
|
inertial instability of intense stratified anticyclones. part 1. generalized stability criterion
|
audiencethe axisymmetric vortices inertial perturbations stratification eddy viscosity flow. circular barotropic vortices linearly stratified shallow confined rigid lids. simplest rankine vortex asymptotic analytic marginal criterion compares results. generalization rayleigh criterion valid dissipative stratified eddies. unlike rayleigh criterion predicts intense anticyclones vorticity dissipation stratification stabilize flow. reveals diagrams vortices rossby burger ekman space. rankine vortex vortices. vortex vortex rossby inviscid vorticity.
|
exact_dup
|
[
"52898488"
] |
52728174
|
10.1080/03610918.2013.770530
|
International audienceA data-driven bandwidth choice for a kernel density estimator called critical bandwidth is investigated. This procedure allows the estimation to have as many modes as assumed for the density to estimate. Both Gaussian and uniform kernels are considered. For the Gaussian kernel, asymptotic results are given. For the uniform kernel, an argument against these properties is mentioned. These theoretical results are illustrated with a simulation study which compare the kernel estimators that rely on critical bandwidth with another one which uses a plug-in method to select its bandwidth. An estimator that consists in estimates of density contour clusters and takes assumptions on number of modes into account is also considered. Finally, the methodology is illustrated using environment monitoring data
|
Comparison of kernel density estimators with assumption on number of modes
|
comparison of kernel density estimators with assumption on number of modes
|
audiencea bandwidth kernel estimator bandwidth investigated. estimate. kernels considered. kernel asymptotic given. kernel argument mentioned. illustrated kernel estimators rely bandwidth plug select bandwidth. estimator contour assumptions considered. methodology illustrated
|
exact_dup
|
[
"52848055"
] |
52729040
|
10.1080/00268976.2011.605774
|
International audienceFourier transform spectra of aziridine (C2H4NH) were recorded at high resolution (0.002 or 0.003 cm-1) in the 600-1750 and 1750-4000 cm-1 regions, using a Bruker IFS125HR spectrometer, located at the LISA facility in Creteil. In parallel, the harmonic force field of aziridine was evaluated analytically at the optimized geometry with second-order Møller-Plesset perturbation theory (MP2) together with the correlation-consistent polarized valence triple zeta basis sets cc-pVTZ. These ab initio predictions were used to perform consistent vibrational assignments for the nu1 to nu17 fundamental bands of aziridine observed in the infrared spectra recorded during this study. Finally, a first detailed rotational assignment was performed for two B-type bands located at 772.3571 cm-1 (nu10, CH2 rock) and 997.1592 cm-1 (nu8, NH bend) and for an A-type band located at 904.0429 cm-1 nu17 , ring deform). We noticed that the nu10 band is weakly perturbed, presumably because the v10 = 1 rotational levels are coupled with those of the v18 = 1 dark band located around 817 cm-1 through B-type and C-type Coriolis resonances
|
New vibrational assignments for the nu1 to nu17 vibrational modes of aziridine and first analysis of the high resolution infrared spectrum of aziridine between 720 cm-1 and 1050 cm-1
|
new vibrational assignments for the nu1 to nu17 vibrational modes of aziridine and first analysis of the high resolution infrared spectrum of aziridine between 720 cm-1 and 1050 cm-1
|
audiencefourier transform aziridine bruker spectrometer lisa facility creteil. harmonic aziridine analytically optimized møller plesset perturbation polarized valence triple zeta pvtz. initio vibrational assignments aziridine infrared study. rotational assignment rock bend deform noticed weakly perturbed presumably rotational coriolis resonances
|
exact_dup
|
[
"47101040",
"48219687"
] |
52736698
|
10.1007/s10950-009-9180-0
|
International audienceThe southern Alps–Ligurian basin junction is one of the most seismically active zone of the western Europe. A constant microseismicity and moderate size events (3.5 < M < 5) are regularly recorded. The last reported historical event took place in February 1887 and reached an estimated magnitude between 6 and 6.5, causing human losses and extensive damages (intensity X, Medvedev–Sponheuer–Karnik). Such an event, occurring nowadays, could have critical consequences given the high density of population living on the French and Italian Riviera. We study the case of an offshore Mw 6.3 earthquake located at the place where two moderate size events (Mw 4.5) occurred recently and where a morphotectonic feature has been detected by a bathymetric survey. We used a stochastic empirical Green's functions (EGFs) summation method to produce a population of realistic accelerograms on rock and soil sites in the city of Nice. The ground motion simulations are calibrated on a rock site with a set of ground motion prediction equations (GMPEs) in order to estimate a reasonable stress-drop ratio between the February 25th, 2001, Mw 4.5, event taken as an EGF and the target earthquake. Our results show that the combination of the GMPEs and EGF techniques is an interesting tool for site-specific strong ground motion estimation
|
A Mw 6.3 earthquake scenario in the city of Nice (southeast France): ground motion simulations
|
a mw 6.3 earthquake scenario in the city of nice (southeast france): ground motion simulations
|
audiencethe southern alps–ligurian basin junction seismically europe. microseismicity moderate regularly recorded. historical took february reached causing losses extensive damages medvedev–sponheuer–karnik occurring nowadays consequences living french italian riviera. offshore earthquake moderate occurred morphotectonic bathymetric survey. stochastic egfs summation realistic accelerograms rock city nice. calibrated rock gmpes reasonable drop february earthquake. gmpes
|
exact_dup
|
[
"52786160"
] |
52745577
|
10.1016/j.jseaes.2008.07.005
|
International audienceThe Çatallar Basin is one of the Miocene basins located in the southern part of the Bey Dağları Massif (SW Turkey). This basin has been reinvestigated and new stratigraphic and sedimentological data are now presented. The Çatallar Basin lies in paraconformity on the Bey Dağları carbonate platform of Late Cretaceous to Palaeogene age. It consists of an impersistent, shallow-marine carbonate base (Karabayır formation, Late Oligocene to Early Burdigalian) followed by an onlapping detrital sequence including the Akçay and Bağbeleni formations (Langhian to Serravallian). The Akçay formation mainly contains turbidites in which several debris-flows and olistostromes are intercalated. The lowest debris flows derive from the local carbonate platforms of Cretaceous and Palaeogene age. Higher, the debris flows and olistostromes contain large carbonate blocks deriving from nearby sources (Bey Dağları platform carbonates), whereas the accompanying pebbles originate from the allochthonous ophiolitic units located farther to the north (Lycian Nappes) or to the east (Antalya Nappes). The origin of these ophiolitic detritus is a matter of debate. The new data obtained in this study favour a northern origin
|
Syn-tectonic sedimentary evolution of the Miocene Çatallar Basin, southwestern Turkey
|
syn-tectonic sedimentary evolution of the miocene çatallar basin, southwestern turkey
|
audiencethe çatallar basin miocene basins southern dağları massif turkey basin reinvestigated stratigraphic sedimentological presented. çatallar basin lies paraconformity dağları carbonate platform cretaceous palaeogene age. impersistent shallow marine carbonate karabayır oligocene burdigalian onlapping detrital akçay bağbeleni formations langhian serravallian akçay turbidites debris flows olistostromes intercalated. debris flows derive carbonate platforms cretaceous palaeogene age. debris flows olistostromes carbonate blocks deriving nearby dağları platform carbonates accompanying pebbles originate allochthonous ophiolitic farther lycian nappes east antalya nappes ophiolitic detritus debate. favour northern
|
exact_dup
|
[
"54026241"
] |
52766045
|
10.1016/j.sedgeo.2005.12.007
|
EditorialThis special issue is dedicated to microbialites and microbial communities and addresses their biological diversity, their biogeochemical functioning, their roles in diagenetic processes and their environmental significance. It is the logical successor of the special issue that one of us edited after the workshop on “Microbial mediation in carbonate diagenesis” which was held in Chichilianne (France) in 1997 (Camoin, G., Ed., 1999. Microbial mediation in carbonate diagenesis. Sedim. Geol., 126, 1–334). The following set of papers arose from a multidisciplinary international workshop entitled “Microbialites and microbial communities in sedimentary systems: biological diversity, biogeochemical functioning, diagenetic processes, tracers of environmental changes” that was held in Paris, France, in September 2004 (G. Camoin and P. Gautret, convenors). This meeting was sponsored by the French Geological Society (Société Géologique de France, SGF), the French Association of Sedimentologists (Association des Sédimentologistes Français, ASF) and the French National Program on Coastal Environments (Programme National Environnement Côtier, PNEC). The goals of this Workshop were: 1) to review the knowledge concerning modern and fossil microbial communities and microbialites that occur in various sedimentary environments (marine realm, thermal springs, lakes, rivers, deserts, karsts etc.), and 2) to establish a prospective regarding the research activities to be developed in various fields concerning the study of microbial communities and microbialites: their biological diversity, their biogeochemical functioning, their implication in the cycles of elements, the diagenetic processes that characterize these structures and the control exerted by environmental and climatic parameters both on their composition and their distribution in time and space. This Workshop has been attended by 70 participants from 11 countries (Belgium, France, Germany, United States, Hungary, Ireland, Italy, The Netherlands, Poland, Switzerland and United Kingdom) with diverse specialities (sedimentology, geochemistry, biology, biochemistry, oceanography, microbiology) and research interests (from Precambrian to modern environments and from natural settings to laboratory experimentation). 52 talks and several open discussions concerned the following interrelated topics, among many, on microbialites : their biological diversity, their biogeochemical functioning, their growth patterns and development, their environmental significance, and the microbial diagenesis and diagenetic processes in microbialites. The abstracts were assembled in a Special Publication of the Association of French Sedimentologists (Camoin and Gautret, Eds, 2004. Microbialites and microbial communities in sedimentary systems, A.S.F. Sp. Publ., 46)
|
Microbialites and microbial communities: Biological diversity, biogeochemical functioning, diagenetic processes, tracers of environmental changes
|
microbialites and microbial communities: biological diversity, biogeochemical functioning, diagenetic processes, tracers of environmental changes
|
editorialthis dedicated microbialites microbial communities addresses diversity biogeochemical functioning roles diagenetic significance. logical successor edited workshop “microbial mediation carbonate diagenesis” held chichilianne camoin microbial mediation carbonate diagenesis. sedim. geol. papers arose multidisciplinary workshop entitled “microbialites microbial communities sedimentary diversity biogeochemical functioning diagenetic tracers changes” held paris september camoin gautret convenors meeting sponsored french geological société géologique french sedimentologists sédimentologistes français french coastal environments programme environnement côtier pnec goals workshop concerning modern fossil microbial communities microbialites sedimentary environments marine realm springs lakes rivers deserts karsts etc. establish prospective concerning microbial communities microbialites diversity biogeochemical functioning implication cycles diagenetic characterize exerted climatic space. workshop attended belgium hungary ireland netherlands poland switzerland kingdom diverse specialities sedimentology geochemistry biochemistry oceanography microbiology interests precambrian modern environments settings experimentation talks discussions concerned interrelated topics microbialites diversity biogeochemical functioning microbial diagenesis diagenetic microbialites. abstracts assembled publication french sedimentologists camoin gautret microbialites microbial communities sedimentary a.s.f. publ.
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exact_dup
|
[
"52469922"
] |
52774457
|
10.1098/rsta.2002.1071
|
International audienceIn this paper, we study the travelling gravity waves in a system of two layers of perfect fluids, the bottom one being infinitely deep, the upper one having a finite thickness h. We assume that the flow is potential, and the dimensionless parameters are the ratio between densities ρ = ρ 2 /ρ 1 and λ = gh/c^2. We study special values of the parameters such that λ(1 − ρ) is near 1 − , where a bifurcation of a new type occurs. We formulate the problem as a spatial reversible dynamical system, where U = 0 corresponds to a uniform state (velocity c in a moving reference frame), and we consider the linearized operator around 0. We show that its spectrum contains the entire real axis (essential spectrum), with in addition a double eigenvalue in 0, a pair of simple imaginary eigenvalues ±iλ at a distance O(1) from 0, and for λ(1 − ρ) above 1, another pair of simple imaginary eigenvalues tending towards 0 as λ(1 − ρ) → 1 +. When λ(1 − ρ) ≤ 1 this pair disappears into the essential spectrum. The rest of the spectrum lies at a distance at least O(1) from the imaginary axis. We show in this paper that for λ(1 − ρ) close to 1 − , there is a family of periodic solutions like in the Lyapunov-Devaney theorem (despite the resonance due to the point 0 in the spectrum). Moreover, showing that the full system can be seen as a perturbation of the Benjamin-Ono equation, coupled with a nonlinear oscillation, we also prove the existence of a family of homoclinic connections to these periodic orbits, provided that these ones are not too small
|
Gravity travelling waves for two superposed fluid layers, one being of infinite depth: a new type of bifurcation
|
gravity travelling waves for two superposed fluid layers, one being of infinite depth: a new type of bifurcation
|
audiencein travelling perfect fluids infinitely dimensionless densities bifurcation occurs. formulate reversible moving linearized eigenvalue imaginary eigenvalues imaginary eigenvalues tending disappears spectrum. lies imaginary axis. lyapunov devaney perturbation benjamin oscillation homoclinic connections orbits
|
exact_dup
|
[
"50531271"
] |
52797275
|
10.1007/978-3-662-44845-8_3
|
International audienceLocal Policy Search is a popular reinforcement learning approach for handling large state spaces. Formally, it searches locally in a parameterized policy space in order to maximize the associated value function averaged over some pre-defined distribution. The best one can hope in general from such an approach is to get a local optimum of this criterion. The first contribution of this article is the following surprising result: if the policy space is convex, any (approximate) local optimum enjoys a global performance guarantee. Unfortunately, the convexity assumption is strong: it is not satisfied by commonly used parameterizations and designing a parameterization that induces this property seems hard. A natural so-lution to alleviate this issue consists in deriving an algorithm that solves the local policy search problem using a boosting approach (constrained to the convex hull of the policy space). The resulting algorithm turns out to be a slight generalization of conservative policy iteration; thus, our second contribution is to highlight an original connection between local policy search and approximate dynamic pro-gramming
|
Local Policy Search in a Convex Space and Conservative Policy Iteration as Boosted Policy Search
|
local policy search in a convex space and conservative policy iteration as boosted policy search
|
audiencelocal popular reinforcement handling spaces. formally searches locally parameterized maximize averaged distribution. hope optimum criterion. surprising convex approximate optimum enjoys guarantee. unfortunately convexity satisfied commonly parameterizations designing parameterization induces hard. lution alleviate deriving solves boosting constrained convex hull turns slight generalization conservative iteration highlight connection approximate gramming
|
exact_dup
|
[
"52797203",
"54033173"
] |
52800991
|
10.1016/j.micpro.2011.08.007
|
International audienceIn the Software Radio context, the parametrization is becoming an important topic especially when it comes to multistandard designs. This paper capitalizes on the Common Operator technique to present new common structures for the FFT and FEC decoding algorithms. A key benefit of exhibiting common operators is the regular architecture it brings when implemented in a Common Operator Bank (COB). This regularity makes the architecture open to future function mapping and adapted to accommodated silicon technology variability through dependable design
|
A common operator for FFT and FEC decoding
|
a common operator for fft and fec decoding
|
audiencein parametrization becoming topic comes multistandard designs. capitalizes decoding algorithms. benefit exhibiting architecture brings implemented bank regularity architecture adapted accommodated silicon dependable
|
exact_dup
|
[
"48227513",
"52689666",
"53009982"
] |
52827295
|
10.1016/j.mathsocsci.2009.07.003
|
ED EPSInternational audienceThe Shapley value is a central notion defining a rational way to share the total worth of a cooperative game among players. We address a general framework leading to applications to games with communication graphs, where the feasible coalitions form a poset whose all maximal chains have the same length. Considering a new way to define the symmetry among players, we propose an axiomatization of the Shapley value of these games. Borrowing ideas from electric networks theory, we show that our symmetry axiom and the efficiency axiom correspond to the two Kirchhoff's laws in the circuit associated to the Hasse diagram of feasible coalitions
|
Values on regular games under Kirchhoff's laws
|
values on regular games under kirchhoff's laws
|
epsinternational audiencethe shapley notion defining rational share worth cooperative game players. games feasible coalitions poset maximal chains length. players propose axiomatization shapley games. borrowing ideas axiom axiom kirchhoff laws circuit hasse feasible coalitions
|
exact_dup
|
[
"47777735",
"47814014"
] |
52836803
|
10.1007/978-3-319-44412-3_2
|
International audienceThe SIFT framework has shown to be effective in the image classification context. In [4], we designed a Bag-of-Words approach based on an adaptation of this framework to time series classification. It relies on two steps: SIFT-based features are first extracted and quantized into words; histograms of occurrences of each word are then fed into a classifier. In this paper, we investigate techniques to improve the performance of Bag-of-Temporal-SIFT-Words: dense extraction of keypoints and different normalizations of Bag-of-Words histograms. Extensive experiments show that our method significantly outperforms nearly all tested standalone baseline classifiers on publicly available UCR datasets
|
Dense Bag-of-Temporal-SIFT-Words for Time Series Classification
|
dense bag-of-temporal-sift-words for time series classification
|
audiencethe sift context. adaptation classification. relies sift quantized histograms occurrences word classifier. sift dense extraction keypoints normalizations histograms. extensive outperforms nearly standalone classifiers publicly datasets
|
exact_dup
|
[
"47368085",
"48153201",
"52992655"
] |
52853083
|
10.1016/j.micinf.2006.11.009
|
Caenorhabditis elegans as a simple model to study phenotypic and genotypic determinants of pathogenicity of extraintestinal pathogenic Escherichia coli Virulence of extraintestinal pathogenic Escherichia coli strains in Caenorhabditis elegans Virulence of extraintestinal pathogenic Escherichia coli strains in Caenorhabditis elegans and mice Comparison of the virulence of extraintestinal pathogenic Escherichia coli in Caenorhabditis elegans and miceInternational audienceExtraintestinal pathogenic Escherichia coli (ExPEC) strains cause disease by invading normally sterile niches within the host body, e.g., urinary tract, blood and cerebrospinal fluid. Infections due to ExPEC strains, in particular urinary tract infections, cause considerable morbidity and significant health-care costs. The goal of our study is to evaluate whether Caenorhabditis elegans can be used as a model to study phenotypic and genetic virulence determinants of ExPEC strains. For this purpose, we used a collection of 31 E. coli strains isolated during acute extra-intestinal infections or from the feces of healthy individuals. For all strains, the phylogeny, the presence of ExPEC virulence factors, the resistance to biologically relevant stressors (bile, human serum and lysozyme), the motility, the growth rate, the virulence in C. elegans and in a murine septicaemia model has been established. The results show that there is a strong link between virulence in C. elegans and certain phenotypic and genetic virulence predictors of ExPEC strains determinable in vitro. Furthermore, there is a significant correlation between virulence of different ExPEC strains in C. elegans and in the murine model. Therefore, our results suggest that C. elegans can be used as a model to study virulence determinants of ExPEC strains
|
Caenorhabditis elegans as a simple model to study phenotypic and genetic virulence determinants of extraintestinal pathogenic Escherichia coli
|
caenorhabditis elegans as a simple model to study phenotypic and genetic virulence determinants of extraintestinal pathogenic escherichia coli
|
caenorhabditis elegans phenotypic genotypic determinants pathogenicity extraintestinal pathogenic escherichia coli virulence extraintestinal pathogenic escherichia coli caenorhabditis elegans virulence extraintestinal pathogenic escherichia coli caenorhabditis elegans virulence extraintestinal pathogenic escherichia coli caenorhabditis elegans miceinternational audienceextraintestinal pathogenic escherichia coli expec invading normally sterile niches e.g. urinary tract cerebrospinal fluid. infections expec urinary tract infections considerable morbidity costs. goal caenorhabditis elegans phenotypic virulence determinants expec strains. coli extra intestinal infections feces healthy individuals. phylogeny expec virulence biologically stressors bile lysozyme motility virulence elegans murine septicaemia established. virulence elegans phenotypic virulence predictors expec determinable vitro. virulence expec elegans murine model. elegans virulence determinants expec
|
exact_dup
|
[
"47107553",
"51444261",
"52197527"
] |
52907263
|
10.1007/978-3-642-12197-5_38
|
International audienceSingle channel EEG systems are very useful in EEG based applications where real time processing, low computational complexity and low cumbersomeness are critical constrains. These include brain-computer interface and biofeedback devices and also some clinical applications such as EEG recording on babies or Alzheimer's disease recognition. In this paper we address the problem of eye blink artifacts detection in such systems. We study an algebraic approach based on numerical differentiation, which is recently introduced from operational calculus. The occurrence of an artifact is modeled as an irregularity which appears explicitly in the time (generalized) derivative of the EEG signal as a delay. Manipulating such delay is easy with the operational calculus and it leads to a simple joint detection and localization algorithm. While the algorithm is devised based on continuous-time arguments, the final implementation step is fully realized in a discrete-time context, using very classical discrete-time FIR filters. The proposed approach is compared with three other approaches: (1) the very basic threshold approach, (2) the approach that combines the use of median filter, matched filter and nonlinear energy operator (NEO) and (3) the wavelet based approach. Comparison is done on: (a) the artificially created signal where the eye activity is synthesized from real EEG recordings and (b) the real single channel EEG recordings from 32 different brain locations. Results are presented with Receiver Operating Characteristics curves. The results show that the proposed approach compares to the other approaches better or as good as, while having lower computational complexity with simple real time implementation. Comparison of the results on artificially created and real signal leads to conclusions that with detection techniques based on derivative estimation we are able to detect not only eye blink artifacts, but also any spike shaped artifact, even if it is very low in amplitude
|
An algebraic method for eye blink artifacts detection in single channel EEG recordings
|
an algebraic method for eye blink artifacts detection in single channel eeg recordings
|
audiencesingle cumbersomeness constrains. biofeedback devices recording babies alzheimer recognition. blink artifacts systems. algebraic operational calculus. occurrence artifact modeled irregularity explicitly delay. manipulating delay operational calculus localization algorithm. devised arguments realized filters. combines filter matched filter wavelet approach. artificially created synthesized recordings recordings locations. receiver operating curves. compares implementation. artificially created detect blink artifacts spike shaped artifact
|
exact_dup
|
[
"47108833",
"52197782",
"52786646"
] |
52915110
|
10.1016/S0020-7683(02)00131-2
|
This paper deals with the application of the adjoint variable approach to sensitivity analysis of objective functions used for defect detection from knowledge of supplementary boundary data, in connection with the use of BIE/BEM formulations for the relevant forward problem. The main objective is to establish expressions for crack shape sensitivity, based on the adjoint variable approach, that are suitable for BEM implementation. In order to do so, it is useful to consider first the case of a cavity defect, for which such boundary-only sensitivity expressions are obtained for general initial geometry and shape perturbations. The analysis made in the cavity defect case is then seen to break down in the limiting case of a crack. However, a closer analysis reveals that sensitivity formulas suitable for BEM implementation can still be established. First, particular sensitivity formulas are obtained for special shape transformations (translation, rotation or expansion of the crack) for either two- or three-dimensional geometries which, except for the case of crack expansion together with dynamical governing equations, are made only of surface integrals (three-dimensional geometries) or line integrals (two-dimensional geometries). Next, arbitrary shape transformations are accommodated by using an additive decomposition of the transformation velocity over a tubular neighbourhood of the crack front, which leads to sensitivity formulas. This leads to sensitivity formulas involving integrals on the crack, the tubular neighbourhood and its boundary. Finally, the limiting case of the latter results when the tubular neighbourhood shrinks around the crack front is shown to yield a sensitivity formula involving the stress intensity factors of both the forward and the adjoint solutions. Classical path-independent integrals are recovered as special cases. The main exposition is done in connection with the scalar transient wave equation. The results are then extended to the linear time-domain elastodynamics framework. Linear static governing equations are contained as obvious special cases. Numerical results for crack shape sensitivity computation are presented for two-dimensional time-domain elastodynamics
|
Sensitivity analysis for shape perturbation of cavity or internal crack using BIE and adjoint variable approach
|
sensitivity analysis for shape perturbation of cavity or internal crack using bie and adjoint variable approach
|
deals adjoint defect supplementary connection formulations problem. establish expressions crack adjoint implementation. cavity defect expressions perturbations. cavity defect break limiting crack. closer reveals formulas established. formulas transformations translation crack geometries crack governing integrals geometries integrals geometries transformations accommodated additive decomposition tubular neighbourhood crack front formulas. formulas involving integrals crack tubular neighbourhood boundary. limiting tubular neighbourhood shrinks crack front involving adjoint solutions. integrals recovered cases. exposition connection transient equation. elastodynamics framework. governing obvious cases. crack elastodynamics
|
exact_dup
|
[
"51236671"
] |
52920474
|
10.1080/09507116.2015.1036531
|
Experiments were carried out to determine the properties of the welded joints in 8mm thick high-strength steels produced by quenching and tempering and thermomechanical rolling with accelerated cooling (tensile strength 821–835 MPa). The dependence of the strength, elongation, hardness, impact energy and crack opening displacement on the heat input in the range 1.0–0.7 kJ mm21 was determined. The results show that the dependence of the strength of the welded joints decreases and that of the elongation increases. The heat input has only a slight effect on the impact energy and crack opening
displacement in the heat-affected zone.Publishers versio
|
Effect of heat input on the mechanical properties of welded joints in high strength steels
|
effect of heat input on the mechanical properties of welded joints in high strength steels
|
welded joints thick steels quenching tempering thermomechanical rolling accelerated cooling tensile elongation hardness crack opening displacement determined. welded joints elongation increases. slight crack opening displacement zone.publishers versio
|
exact_dup
|
[
"39973535"
] |
52997694
|
10.1016/j.strusafe.2014.10.005
|
International audienceReinforced concrete (RC) structures are subject to environmental actions affecting their performance, serviceability and safety. Among these actions, chloride ingress leads to corrosion initiation and its interaction with service loading could reduce its operational life. Experimental evidence indicates that chloride ingress is highly influenced by weather conditions in the surrounding environment and therefore by climate change. Consequently, both structural design and maintenance should be adapted to these new environmental conditions. This work focuses on the assessment of the costs and benefits of two climate adaptation strategies for new RC structures placed in chloride-contaminated environments under various climate change scenarios. Their cost-effectiveness is measured in terms of the Benefit-to-Cost Ratio (BCR) and the probability that BCR exceeds unity –i.e., Pr(BCR>1). It was found that increasing concrete strength grade is more cost-effective than increasing design cover. The results also indicate that the cost-effectiveness of a given adaptation strategy depends mainly on the type of structural component, exposure conditions and climate change scenarios
|
Damage risks and economic assessment of climate adaptation strategies for design of new concrete structures subject to chloride-induced corrosion
|
damage risks and economic assessment of climate adaptation strategies for design of new concrete structures subject to chloride-induced corrosion
|
audiencereinforced concrete affecting serviceability safety. chloride ingress corrosion initiation loading operational life. chloride ingress influenced weather surrounding change. maintenance adapted conditions. focuses benefits adaptation placed chloride contaminated environments scenarios. effectiveness benefit exceeds unity –i.e. concrete grade cover. effectiveness adaptation scenarios
|
exact_dup
|
[
"46757126"
] |
53006156
|
10.1007/978-3-642-18482-6_19
|
International audienceFor linear stationary systems, the infinite dimensional framework allows one to distinguish different notions of stability: weak, strong or exponential. The purpose of this chapler is to investigate the problem of strong stability, i.e. asymptotic non-exponential stability for linear systems of neutral type in order to use this characterization in the study of the stabilizability problem for this type of systems. An important tool in this investigation is the Riesz basis property of generalized eigenspaces of the neutral system, because that the generalized eigenvectors do not form, in general, a Riesz basis. This allows one to describe more precisely asymptotic non-exponential stability of neutral systems. For a particular case, conditions of strong stabilizability of neutral type systems are given with a feedback law without derivative of the delayed state
|
On strong stability and stabilizability of systems of neutral type
|
on strong stability and stabilizability of systems of neutral type
|
audiencefor stationary infinite distinguish notions exponential. chapler i.e. asymptotic exponential neutral stabilizability systems. riesz eigenspaces neutral eigenvectors riesz basis. precisely asymptotic exponential neutral systems. stabilizability neutral delayed
|
exact_dup
|
[
"50616072"
] |
53180250
|
10.1007/978-3-319-12778-1_20
|
Hibernate Query Language (HQL) provides a framework for mapping object-oriented domain models to traditional relational databases. In this context, existing information leakage analyses cannot be applied directly, due to the presence and interaction of high-level application variables and SQL database attributes. The paper extends the Abstract Interpretation framework to properly deal with this challenging applicative scenario, by using the symbolic domain of positive propositional formulae to capture variable dependences affecting (directly or indirectly) the propagation of confidential data
|
Information-flow Analysis of Hibernate Query Languages
|
information-flow analysis of hibernate query languages
|
hibernate query oriented traditional relational databases. leakage attributes. extends properly deal challenging applicative symbolic propositional formulae capture dependences affecting indirectly propagation confidential
|
exact_dup
|
[
"41139721"
] |
53182589
|
10.1007/978-3-319-19581-0_38
|
In this paper we present a system for modality detection which is then used for Subjectivity and Factuality evaluation. The system has been tested lately on a task for Subjectivity and Irony detection in Italian tweets , where the performance was 10th and 4th, respectively, over 27 participants overall. We will focus our paper on an internal evaluation where we considered three national newspapers Il Corriere, Repubblica, Libero. This task was prompted by a project on the evaluation of press stylistic features in political discourse. The project used newspaper articles from the same sources over a period of three months, thus including latest political 2013 governmental crisis. We intended to produce a similar experiment and evaluate results in comparison with previous 2011 crisis. In this evaluation, we focused on Subjectivity, Polarity and Factuality which include Modality evaluation. Final graphs at the end of the paper will show results confirming our previous findings about differences in style, with Il Corriere emerging as the most atypical
|
Automatic Detection of Modality with ITGETARUNS
|
automatic detection of modality with itgetaruns
|
modality subjectivity factuality evaluation. lately subjectivity irony italian tweets overall. newspapers corriere repubblica libero. prompted stylistic discourse. newspaper articles latest governmental crisis. intended crisis. focused subjectivity polarity factuality modality evaluation. confirming style corriere emerging atypical
|
exact_dup
|
[
"41142061"
] |
54024785
|
10.1016/j.sedgeo.2011.11.003
|
International audienceHigh-resolution seismic profiles along with physical and sedimentological properties of sediment cores from the Saguenay (Eastern Canada) and Reloncavi (Chile) Fjords allowed the identification of several decimeter to meter-thick turbidites. In both fjords, the turbidites were associated with large magnitude historic and pre-historic earthquakes including the 1663 AD (M > 7) earthquake in the Saguenay Fjord, and the 1960 (M 9.5), 1837 (M ~ 8) and 1575 AD major Chilean subduction earthquakes in the Reloncavi Fjord. In addition, a sand layer with exoscopic characteristics typical of a tsunami deposit was observed immediately above the turbidite associated with the 1575 AD earthquake in the Reloncavi Fjord and supports both the chronology and the large magnitude of that historic earthquake. In the Saguenay Fjord, the earthquake-triggered turbidites are sometimes underlying a hyperpycnite associated with the rapid breaching and draining of a natural dam formed by earthquake-triggered landslides. Similar hyperpycnal floods were also recorded in historical and continental geological archives for the 1960 and 1575 AD Chilean subduction earthquakes, highlighting the risk of such flood events several weeks or months after main earthquake. In both fjords, as well as in other recently recognized earthquake-triggered turbidites, the decimeter-to meter-thick normally-graded turbidites are characterized by a homogeneous, but slightly fining upward tail. Finally, this paper also emphasizes the sensitivity of fjords to record historic and pre-historic seismicity
|
Comparison of earthquake-triggered turbidites from the Saguenay (Eastern Canada) and Reloncavi (Chilean margin) Fjords: implications for paleoseismicity and sedimentology
|
comparison of earthquake-triggered turbidites from the saguenay (eastern canada) and reloncavi (chilean margin) fjords: implications for paleoseismicity and sedimentology
|
audiencehigh seismic sedimentological sediment cores saguenay eastern canada reloncavi chile fjords decimeter meter thick turbidites. fjords turbidites historic historic earthquakes earthquake saguenay fjord chilean subduction earthquakes reloncavi fjord. sand exoscopic tsunami deposit immediately turbidite earthquake reloncavi fjord supports chronology historic earthquake. saguenay fjord earthquake triggered turbidites sometimes hyperpycnite breaching draining earthquake triggered landslides. hyperpycnal floods historical continental geological archives chilean subduction earthquakes highlighting flood earthquake. fjords recognized earthquake triggered turbidites decimeter meter thick normally graded turbidites homogeneous fining upward tail. emphasizes fjords record historic historic seismicity
|
exact_dup
|
[
"52732436"
] |
54824591
|
10.1016/j.bbabio.2016.01.002
|
International audienceCardiolipin (CL) is a unique mitochondrial phospholipid potentially affecting many aspects of mitochondrial function/processes, i.e. energy production through oxidative phosphorylation. Most data focusing on implication of CL content and mitochondrial bioenergetics were performed in yeast or in cellular models of Barth syndrome. Previous work reported that increase in CL content leads to decrease in liver mitochondrial ATP synthesis yield. Therefore the aim of this study was to determine the effects of moderate decrease in CL content on mitochondrial bioenergetics in human hepatocytes. For this purpose, we generated a cardiolipin synthase knockdown (shCLS) in HepaRG hepatoma cells showing bioenergetics features similar to primary human hepatocytes. shCLS cells exhibited a 55% reduction in CLS gene and a 40% decrease in protein expression resulting in a 45% lower content in CL compared to control (shCTL) cells. Oxygen consumption was significantly reduced in shCLS cells compared to shCTL regardless of substrate used and energy state analyzed. Mitochondrial low molecular weight supercomplexes content was higher in shCLS cells (+ 60%) compared to shCTL. Significant fragmentation of the mitochondrial network was observed in shCLS cells compared to shCTL cells. Surprisingly, mitochondrial ATP synthesis was unchanged in shCLS compared to shCTL cells but exhibited a higher ATP:O ratio (+ 46%) in shCLS cells. Our results suggest that lowered respiratory chain activity induced by moderate reduction in CL content may be due to both destabilization of supercomplexes and mitochondrial network fragmentation. In addition, CL content may regulate mitochondrial ATP synthesis yield
|
Reduced cardiolipin content decreases respiratory chain capacities and increases ATP synthesis yield in the human HepaRG cells
|
reduced cardiolipin content decreases respiratory chain capacities and increases atp synthesis yield in the human heparg cells
|
audiencecardiolipin mitochondrial phospholipid potentially affecting mitochondrial i.e. oxidative phosphorylation. focusing implication mitochondrial bioenergetics yeast barth syndrome. mitochondrial yield. moderate mitochondrial bioenergetics hepatocytes. cardiolipin synthase knockdown shcls heparg hepatoma bioenergetics hepatocytes. shcls exhibited shctl cells. shcls shctl regardless analyzed. mitochondrial supercomplexes shcls shctl. fragmentation mitochondrial shcls shctl cells. surprisingly mitochondrial unchanged shcls shctl exhibited shcls cells. lowered respiratory moderate destabilization supercomplexes mitochondrial fragmentation. regulate mitochondrial
|
exact_dup
|
[
"48157110",
"54015300"
] |
82215376
|
10.1016/S1059-1311(98)80026-5
|
The cognitive and psychiatric associations of childhood epilepsy have not been studied in developing countries. Children with epilepsy were identified during a population-based epidemiological study of 1403 8- to 12-year-old children in Kerala, South India. They were compared with age-, sex- and social class-matched controls on measures of reading, vocabulary, non-verbal reasoning and school performance. In addition, psychiatric symptoms were measured using standard questionnaires and the presence or absence of psychiatric disorder was established by interview. Patients performed as well as controls on the non-verbal test, but performed worse on tests of vocabulary and reading, suggesting a specific disadvantage in the area of education. Psychiatric disorder was more prevalent in the children with epilepsy. It was concluded that epilepsy in the population studied is accompanied by a significant burden of cognitive and psychiatric disorders which need recognition and adequate service provision
|
Psychiatric disorder and cognitive function in children with epilepsy in Kerala, South India
|
psychiatric disorder and cognitive function in children with epilepsy in kerala, south india
|
psychiatric associations childhood epilepsy countries. epilepsy epidemiological kerala india. matched reading vocabulary verbal reasoning performance. psychiatric questionnaires psychiatric disorder interview. verbal worse vocabulary reading disadvantage education. psychiatric disorder prevalent epilepsy. concluded epilepsy accompanied burden psychiatric disorders recognition adequate provision
|
exact_dup
|
[
"72796512"
] |
84095276
|
10.1103/PhysRevB.96.085422
|
We propose a model of three-dimensional topological insulators consisting of
weakly coupled electron- and hole-gas layers with Rashba spin-orbit interaction
stacked along a given axis. We show that in the presence of strong
electron-electron interactions the system realizes a fractional strong
topological insulator, where the rotational symmetry and condensation energy
arguments still allow us to treat the problem as quasi-one-dimensional with
bosonization techniques. We also show that if Rashba and Dresselhaus spin-orbit
interaction terms are equally strong, by doping the system with magnetic
impurities, one can bring it into the Weyl semimetal phase
|
Three-Dimensional Fractional Topological Insulators in Coupled Rashba
Layers
|
three-dimensional fractional topological insulators in coupled rashba layers
|
propose topological insulators consisting weakly rashba orbit stacked axis. realizes fractional topological insulator rotational condensation arguments treat quasi bosonization techniques. rashba dresselhaus orbit equally doping impurities bring weyl semimetal
|
exact_dup
|
[
"154352683"
] |
84138536
|
10.1098/rstb.2013.0525
|
Many physical and biological systems can be studied using complex network theory, a new statistical physics understanding of graph theory. The recent application of complex network theory to the study of functional brain networks has generated great enthusiasm as it allows addressing hitherto non-standard issues in the field, such as efficiency of brain functioning or vulnerability to damage. However, in spite of its high degree of generality, the theory was originally designed to describe systems profoundly different from the brain. We discuss some important caveats in the wholesale application of existing tools and concepts to a field they were not originally designed to describe. At the same time, we argue that complex network theory has not yet been taken full advantage of, as many of its important aspects are yet to make their appearance in the neuroscience literature. Finally, we propose that, rather than simply borrowing from an existing theory, functional neural networks can inspire a fundamental reformulation of complex network theory, to account for its exquisitely complex functioning mode
|
Functional brain networks: great expectations, hard times and the big leap forward
|
functional brain networks: great expectations, hard times and the big leap forward
|
theory. great enthusiasm addressing hitherto functioning vulnerability damage. spite generality originally profoundly brain. caveats wholesale concepts originally describe. argue advantage appearance neuroscience literature. propose borrowing inspire reformulation exquisitely functioning
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exact_dup
|
[
"148678319"
] |
84995567
|
10.1007/8904_2017_10
|
Galactose epimerase deficiency is an inborn error of metabolism due to uridine diphosphate-galactose-4'-epimerase (GALE) deficiency. We report the clinical presentation, genetic and biochemical studies in two siblings with generalized GALE deficiency.Patient 1: The first child was born with a dysmorphic syndrome. Failure to thrive was noticed during the first year. Episodes of heart failure due to dilated cardiomyopathy, followed by liver failure, occurred between 12 and 42 months. The finding of a serum transferrin isoelectrofocusing (IEF) type 1 pattern led to the suspicion of a congenital disorder of glycosylation (CDG). Follow-up disclosed psychomotor disability, deafness, and nuclear cataracts.Patient 2: The sibling of patient 1 was born with short limbs and hip dysplasia. She is deceased in the neonatal period due to intraventricular hemorrhage in the context of liver failure. Investigation disclosed galactosuria and normal transferrin glycosylation.Next-generation sequence panel analysis for CDG syndrome revealed the previously reported c.280G>A (p.[V94M]) homozygous mutation in the GALE gene. Enzymatic studies in erythrocytes (patient 1) and fibroblasts (patients 1 and 2) revealed markedly reduced GALE activity confirming generalized GALE deficiency. This report describes the fourth family with generalized GALE deficiency, expanding the clinical spectrum of this disorder, since major cardiac involvement has not been reported before.info:eu-repo/semantics/publishedVersio
|
Galactose Epimerase Deficiency: Expanding the Phenotype
|
galactose epimerase deficiency: expanding the phenotype
|
galactose epimerase deficiency inborn metabolism uridine diphosphate galactose epimerase gale deficiency. presentation biochemical siblings gale deficiency.patient born dysmorphic syndrome. thrive noticed year. episodes dilated cardiomyopathy occurred months. transferrin isoelectrofocusing suspicion congenital disorder glycosylation disclosed psychomotor disability deafness cataracts.patient sibling born limbs dysplasia. deceased neonatal intraventricular hemorrhage failure. disclosed galactosuria transferrin glycosylation.next syndrome homozygous mutation gale gene. enzymatic erythrocytes fibroblasts markedly gale confirming gale deficiency. describes fourth gale deficiency expanding disorder involvement before.info repo semantics publishedversio
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exact_dup
|
[
"160746239"
] |
85001378
|
10.1016/j.biortech.2017.04.062
|
The hydrolysis process of a real fraction of arabinoxylans derived from wheat bran was studied. The influence of catalyst type and loading, reaction time and different metal cations were discussed in terms of the hydrolysis yield of arabinose and xylose oligomers as well as the formation of furfural as degradation product. A high yield of arabinoxylans into the corresponding monomeric sugars (96 and 94% from arabino- and xylo-oligosaccharides, respectively) was obtained at relatively high temperatures (180 °C) and short reaction times (15 min) with a catalyst loading of 4.8 g of RuCl3/Al-MCM-48 per g of initial carbon in hemicelluloses.CTQ2015-64892-R (MINECO/FEDER
|
Maximization of monomeric C5 sugars from wheat bran by using mesoporous ordered silica catalysts
|
maximization of monomeric c5 sugars from wheat bran by using mesoporous ordered silica catalysts
|
hydrolysis arabinoxylans wheat bran studied. catalyst loading cations hydrolysis arabinose xylose oligomers furfural degradation product. arabinoxylans monomeric sugars arabino xylo oligosaccharides catalyst loading rucl hemicelluloses.ctq mineco feder
|
exact_dup
|
[
"150212555"
] |
85001401
|
10.1016/j.scitotenv.2017.04.161
|
Producción CientíficaThe continuous abatement of a synthetic N2O emission from a nitric acid plant coupled with the simultaneously production of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) copolymer and the coenzyme Q10 (CoQ10) in a bubble column reactor (BCR) was tested using methanol, glycerol and a mixture of sodium acetate-acetic acid (Ac-HAc) as a carbon and electron donor source. The BCRs were inoculated with Paracoccus denitrificans and supplied with the carbon/electron donor at a loading rate of 139 g C m− 3 d− 1. High N2O removal efficiencies (81–91%) were achieved, with glycerol supporting the highest abatement. The PHBV cell content ranged from 25 to 53%, with highest accumulation in the culture obtained with methanol and Ac-HAc. However, the greatest PHBV productivities were observed in the BCRs operated with glycerol and Ac-HAc (21.7 and 33.5 g PHBV m− 3 d− 1, respectively). Glycerol supply induced the highest molar ratio (23%) of the homopolymer 3-hydroxyvalerate in the composition of PHBV. In addition, the specific cell content of CoQ10 ranged from 0.4 to 1 mg g− 1. This work constitutes, to the best of our knowledge, the first study combining N2O abatement with the simultaneous production of multiple bioproducts, which pave the way to the development of greenhouse gas biorefineries for climate change mitigation.Ministerio de Economía, Industria y Competitividad (Project CTM2015-70442-R and Red NOVEDAR
|
Assessing the influence of the carbon source on the abatement of industrial N2O emissions coupled with the synthesis of added-value bioproducts
|
assessing the influence of the carbon source on the abatement of industrial n2o emissions coupled with the synthesis of added-value bioproducts
|
producción científicathe abatement synthetic nitric simultaneously poly hydroxybutyrate hydroxyvalerate phbv copolymer coenzyme bubble reactor methanol glycerol mixture sodium acetate acetic donor source. bcrs inoculated paracoccus denitrificans supplied donor loading removal efficiencies glycerol supporting abatement. phbv ranged accumulation methanol hac. greatest phbv productivities bcrs operated glycerol phbv glycerol supply molar homopolymer hydroxyvalerate phbv. ranged constitutes combining abatement simultaneous bioproducts pave greenhouse biorefineries mitigation.ministerio economía industria competitividad novedar
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exact_dup
|
[
"150212600"
] |
11308100
|
10.1063/1.2402226
|
The authors consider electron heating in the sheath regions of capacitive discharges excited by a combination of two frequencies, one much higher than the other. There is a common supposition that in such discharges the higher frequency is the dominant source of electron heating. In this letter, the authors discuss closed analytic expressions quantifying the Ohmic and collisionless electron heating in a dual frequency discharge. In both cases, the authors show that the lower frequency parameters strongly influence the heating effect. Moreover, this influence is parametrically different, so that the dominant heating mechanism may be changed by varying the low frequency current density
|
Electron heating mode transitions in dual frequency capacitive discharges
|
electron heating mode transitions in dual frequency capacitive discharges
|
heating sheath capacitive discharges excited other. supposition discharges heating. letter analytic expressions quantifying ohmic collisionless heating discharge. heating effect. parametrically heating changed
|
exact_dup
|
[
"147596127"
] |
11310177
|
10.1007/3-540-36578-8_2
|
The Web is likely to be a central platform for software development in the future. We investigate how Semantic Web technologies, in particular ontologies, can be utilised to support software component development in a Web environment. We use description logics, which underlie Semantic Web ontology languages such as DAML+OIL, to develop\ud
an ontology for matching requested and provided components. A link between modal logic and description logics will prove invaluable for the provision of reasoning support for component and service behaviour
|
An ontology for software component matching
|
an ontology for software component matching
|
platform future. semantic technologies ontologies utilised environment. logics underlie semantic ontology languages daml ontology matching requested components. modal logic logics invaluable provision reasoning
|
exact_dup
|
[
"147600815"
] |
11310588
|
10.1016/j.jss.2008.05.037
|
In this paper we operationally define and measure tacit knowledge at the team-level in the software development domain. Through a series of three empirical studies we developed and validated the team tacit knowledge measure (TTKM) for software developers. In the first study, initial scale items were developed using the repertory grid technique and content analysis. In Study 2, supplied repertory grids were administered to novices and experts to establish differential items, and Study 3 validated the TTKM on a sample of 48 industrial software development teams. In developing the TTKM we explored the relationships between tacit knowledge, explicit job knowledge and social interaction and their effect on team performance as measured by efficiency and effectiveness. In addition we assess the implications for managing software development teams and increasing team performance through social interaction
|
Development of a team measure for tacit knowledge in software development teams
|
development of a team measure for tacit knowledge in software development teams
|
operationally tacit team domain. validated team tacit ttkm developers. items repertory analysis. supplied repertory grids administered novices experts establish items validated ttkm industrial teams. ttkm explored tacit team effectiveness. managing teams team
|
exact_dup
|
[
"147601593"
] |
11991854
|
10.1016/j.nimb.2007.12.096
|
Multilayer structures with five periods of amorphous SiGe nanoparticles/SiO2 layers with different thickness were deposited by Low Pressure Chemical Vapor Deposition and annealed to crystallize the SiGe nanoparticles. The use of grazing incidence RBS was necessary to obtain sufficient depth resolution to separate the signals arising from the individual layers only a few nm thick. The average size and areal density of the embedded SiGe nanoparticles as well as the oxide interlayer thickness were determined from the RBS spectra. Details of eventual composition changes and diffusion processes caused by the annealing processes were also studied. Transmission Electron Microscopy was used to obtain complementary information on the structural parameters of the samples in order to check the information yielded by RBS. The study revealed that annealing at 900 °C for 60 s, enough to crystallize the SiGe nanoparticles, leaves the structure unaltered if the interlayer thickness is around 15 nm or higher
|
Combined grazing incidence RBS and TEM analysis of luminescent nano-SiGe/SiO2 multilayers.
|
combined grazing incidence rbs and tem analysis of luminescent nano-sige/sio2 multilayers.
|
multilayer amorphous sige nanoparticles deposited vapor deposition annealed crystallize sige nanoparticles. grazing incidence arising thick. areal embedded sige nanoparticles oxide interlayer spectra. eventual annealing studied. microscopy complementary check yielded rbs. annealing crystallize sige nanoparticles leaves unaltered interlayer
|
exact_dup
|
[
"148653241"
] |
11992056
|
10.1063/1.2924284
|
We report the fabrication and frequency characterization of mechanical resonators piezoelectrically actuated with aluminum nitride films. The resonators consist of a freestanding unimorph structure made up of a metal/AlN/metal piezoelectric stack and a Si3N4 supporting layer. We show that the electrical impedance of the one-port device can be used to assess the vibrational behavior of the resonators, provided that the modes do not exhibit specific symmetries, for which the impedance variations cancel. Frequency shifts arise when loading the resonators with small masses. As gravimetric sensors, the microbridges exhibit mass sensitivities of 0.18 fg/Hz for vibrational modes around 2 MHz
|
Electrical detection of the mechanical resonances in AlN-actuated microbridges for mass sensing applications
|
electrical detection of the mechanical resonances in aln-actuated microbridges for mass sensing applications
|
fabrication resonators piezoelectrically actuated aluminum nitride films. resonators consist freestanding unimorph piezoelectric stack supporting layer. electrical impedance port vibrational resonators exhibit symmetries impedance cancel. shifts arise loading resonators masses. gravimetric sensors microbridges exhibit sensitivities vibrational
|
exact_dup
|
[
"148653447"
] |
11994364
|
10.1063/1.3112738
|
We apply direct transient growth analysis in complex geometries to investigate its role in the primary and secondary bifurcation/transition process of the flow past a circular cylinder. The methodology is based on the singular value decomposition of the Navier-Stokes evolution operator linearized about a two-dimensional steady or periodic state which leads to the optimal growth modes. Linearly stable and unstable steady flow at Re=45 and 50 is considered first, where the analysis demonstrates that strong two-dimensional transient growth is observed with energy amplifications of order of 10(3) at U-infinity tau/D approximate to 30. Transient growth at Re=50 promotes the linear instability which ultimately saturates into the well known von-Kaacutermaacuten street. Subsequently we consider the transient growth upon the time-periodic base state corresponding to the von-Kaacutermaacuten street at Re=200 and 300. Depending upon the spanwise wavenumber the flow at these Reynolds numbers are linearly unstable due to the so-called mode A and B instabilities. Once again energy amplifications of order of 10(3) are observed over a time interval of tau/T=2, where T is the time period of the base flow shedding. In all cases the maximum energy of the optimal initial conditions are located within a diameter of the cylinder in contrast to the spatial distribution of the unstable eigenmodes which extend far into the downstream wake. It is therefore reasonable to consider the analysis as presenting an accelerator to the existing modal mechanism. The rapid amplification of the optimal growth modes highlights their importance in the transition process for flow past circular cylinder, particularly when comparing with experimental results where these types of convective instability mechanisms are likely to be activated. The spatial localization, close to the cylinder, of the optimal initial condition may be significant when considering strategies to promote or control shedding
|
Transient growth analysis of the flow past a circular cylinder
|
transient growth analysis of the flow past a circular cylinder
|
transient geometries bifurcation circular cylinder. methodology singular decomposition navier stokes linearized steady modes. linearly unstable steady demonstrates transient amplifications infinity approximate transient promotes instability ultimately saturates kaacutermaacuten street. subsequently transient kaacutermaacuten street spanwise wavenumber reynolds linearly unstable instabilities. amplifications shedding. cylinder unstable eigenmodes extend downstream wake. reasonable presenting accelerator modal mechanism. amplification highlights circular cylinder convective instability activated. localization cylinder promote shedding
|
exact_dup
|
[
"148655648"
] |
11997664
|
10.1007/s00521-010-0380-x
|
In this paper, we propose a swarm intelligence localization strategy in which robots have to locate different resource areas in a bounded arena and forage between them. The robots have no knowledge of the arena dimensions and of the number of resource areas. The strategy is based on peer-to-peer local communication without the need for any central unit. Social Odometry leads to a self-organized path selection. We show how collective decisions lead the robots to choose the closest resource site from a central place. Results are presented with simulated and real robots
|
Collective decision-making based on social odometry
|
collective decision-making based on social odometry
|
propose swarm intelligence localization robots locate resource arena forage them. robots arena resource areas. peer peer unit. odometry organized selection. collective decisions robots closest resource place. robots
|
exact_dup
|
[
"148658949"
] |
11998437
|
10.1016/S1270-9638(00)00137-1
|
The purpose of the present paper is to discuss the spatial structure of global instabilities, solutions of the partial derivative eigenvalue problem resulting from a nonparallel linear instability analysis of the incompressible Navier–Stokes and continuity equations, as developing upon four prototype essentially two-dimensional steady laminar flows. Theoretical knowledge of these eigendisturbances is instrumental to devising measurement techniques appropriate for their experimental recovery and ultimate control of laminar-turbulent transition mechanisms. Raising the awareness of the global linear flow eigenmodes contributes to redefining the boundaries between experimental observations which may be attributed to linear global as opposed to nonlinear mechanism
|
On the Spatial Structure of Global Linear Instabilities And Their Experimental Identification
|
on the spatial structure of global linear instabilities and their experimental identification
|
instabilities eigenvalue nonparallel instability incompressible navier–stokes continuity prototype essentially steady laminar flows. eigendisturbances instrumental devising recovery ultimate laminar turbulent mechanisms. raising awareness eigenmodes contributes redefining boundaries attributed opposed
|
exact_dup
|
[
"148659780"
] |
11999822
|
10.1016/j.micpro.2011.04.004
|
The high integration density of current nanometer technologies allows the implementation of complex floating-point applications in a single FPGA. In this work the intrinsic complexity of floating-point operators is addressed targeting configurable devices and making design decisions providing the most suitable performance-standard compliance trade-offs. A set of floating-point libraries composed of adder/subtracter, multiplier, divisor, square root, exponential, logarithm and power function are presented. Each library has been designed taking into account special characteristics of current FPGAs, and with this purpose we have adapted the IEEE floating-point standard (software-oriented) to a custom FPGA-oriented format. Extended experimental results validate the design decisions made and prove the usefulness of reducing the format complexit
|
Customizing floating-point units for FPGAs: Area-performance-standard trade-offs
|
customizing floating-point units for fpgas: area-performance-standard trade-offs
|
nanometer technologies floating fpga. intrinsic floating addressed targeting configurable devices decisions compliance trade offs. floating libraries composed adder subtracter multiplier divisor exponential logarithm presented. library fpgas adapted floating oriented custom fpga oriented format. validate decisions usefulness reducing format complexit
|
exact_dup
|
[
"148661177"
] |
12030800
|
10.1007/s10100-010-0186-z
|
Abstract This paper investigates the association between different kinds of budgetary
expenditure and economic growth of Poland. The empirical analysis makes use of
linear and nonlinear Granger causality tests to evaluate the applicability of Wagner’s
Law and that of the contrasting Keynesian theory.We employ aggregate and disaggregate
data with the sub-categories of most important budgetary expenditure, including
health care and social security, education and science, national defence and public
security expenditure and government administration expenditure for the period Q1
2000 to Q3 2008. This causality analysis indicates that total relation between budgetary
expenditure and economic growth is consistent with Keynesian theory. The results
of our computations have important policy implications. In case of Poland the health
care expenditure was found to be as important for economic growth as expenditures
on education and science. Furthermore, in order to stimulate economic growth, Polish
government should consider reallocating some of national defence, public security
and government administration expenditure to health care, social security, education
and science expenditure.
|
The relationship between budgetary expenditure and economic growth in Poland
|
the relationship between budgetary expenditure and economic growth in poland
|
investigates kinds budgetary expenditure poland. granger causality applicability wagner’s contrasting keynesian theory.we employ aggregate disaggregate categories budgetary expenditure security defence security expenditure administration expenditure causality budgetary expenditure keynesian theory. computations implications. poland expenditure expenditures science. stimulate polish reallocating defence security administration expenditure security expenditure.
|
exact_dup
|
[
"19085163"
] |
140799
|
10.1007/s00170-010-3091-7
|
This paper presents the expected long-run cost per unit time for a system
monitored by an adaptive control chart with variable sample sizes: if the
control chart signals that the system is out of control, the sampling which
follows will be conducted with a larger sample size. The system is supposed to
have three states: in-control, out-of-control, and failed. Two levels of repair
are applied to maintain the system. A minor repair will be conducted if an
assignable cause is confirmed by an inspection, and a major repair will be
performed if the system fails. Both the minor and major repairs are assumed to
be perfect. We derive the expected long-run cost per unit time, which can be
used to obtain the optimal inspection policy. Numerical examples are conducted
to validate the derived cost
|
Optimal inspection policy for three-state systems monitored by variable sample
size control charts
|
optimal inspection policy for three-state systems monitored by variable sample size control charts
|
presents monitored adaptive chart sizes chart size. supposed failed. repair maintain system. minor repair assignable confirmed inspection repair fails. minor repairs perfect. derive inspection policy. validate
|
exact_dup
|
[
"10636790"
] |
144012827
|
10.1002/ajpa.10402
|
This study presents an analysis of linear enamel hypoplasias (LEH) and plane-form defects (PFD) in the hominine dental sample from the Sima de los Huesos (SH) Middle Pleistocene site in Atapuerca (Spain). The SH sample comprises 475 teeth, 467 permanent and 8 deciduous, belonging to a minimum of 28 individuals. The method for recording PFD and LEH is discussed, as well as the definition of LEH. The prevalence of LEH and PFD in SH permanent dentition (unilateral total count) is 4.6% (13/280). Only one deciduous tooth (lower dc) showed an enamel disruption. Prevalence by individual ranges from 18.7-30%. The most likely explanation for the relatively low LEH and PFD prevalence in the SH sample suggests that the SH population exhibited a low level of developmental stress. The age at occurrence of LEH and PFD was determined by counting the number of perikymata between each lesion and the cervix of the tooth. Assuming a periodicity of nine days for the incremental lines, the majority of LEH in the SH sample occurred during the third year of life and may be related to the metabolic stress associated with weaning. Am J Phys Anthropol 123:000-000, 2004. © 2004 Wiley-Liss, Inc.http://dx.doi.org/10.1002/ajpa.1040
|
Enamel hypoplasias and physiological stress in the Sima de los Huesos Middle Pleistocene hominins
|
enamel hypoplasias and physiological stress in the sima de los huesos middle pleistocene hominins
|
presents enamel hypoplasias defects hominine dental sima huesos pleistocene atapuerca spain comprises teeth permanent deciduous belonging individuals. recording leh. prevalence permanent dentition unilateral count deciduous tooth enamel disruption. prevalence ranges explanation prevalence exhibited developmental stress. occurrence counting perikymata lesion cervix tooth. periodicity nine incremental majority occurred metabolic weaning. anthropol wiley liss inc. ajpa.
|
exact_dup
|
[
"19125387"
] |
144014071
|
10.1023/A:1018990014974
|
Abstract An algorithm for computing a stationary point of a quadratic program with box constraints(BQP) is proposed. Each iteration of this procedure comprises a guessing strategy whichforecasts the active bounds at a stationary point, the determination of a descent direction bymeans of solving a reduced strictly convex quadratic program with box constraints and anexact line search. Global convergence is established in the sense that every accumulationpoint is stationary. Moreover, it is shown that the algorithm terminates after a finite numberof iterations, if at least one iterate is sufficiently close to a stationary point which satisfiesa certain sufficient optimality condition. The algorithm can be easily implemented for sparselarge-scale BQPs. Furthermore, it simplifies for concave BQPs, as it is not required to solvestrictly convex quadratic programs in this case. Computational experience with large-scaleBQPs is included and shows the appropriateness of this type of methodology.http://dx.doi.org/10.1023/A:101899001497
|
A block active set algorithm for large-scalequadratic programming with box constraints
|
a block active set algorithm for large-scalequadratic programming with box constraints
|
stationary quadratic proposed. iteration comprises guessing whichforecasts bounds stationary descent bymeans solving strictly convex quadratic anexact search. accumulationpoint stationary. terminates numberof iterations iterate sufficiently stationary satisfiesa optimality condition. implemented sparselarge bqps. simplifies concave bqps solvestrictly convex quadratic programs case. scalebqps appropriateness methodology.
|
exact_dup
|
[
"19126148"
] |
146501661
|
10.1007/978-3-319-39381-0_1
|
There is a significant shift towards a digital identity and yet the most common means of user authentication, username and password pairs, is an imperfect system. In this paper we present the notion of using videogames, specifically Tetris, to supplement traditional authentication methods and provide an additional layer of identity validation. Two experiments were undertaken that required participants to play a modified version of Tetris; the first experiment with a randomly ordered set of pieces and the second with the pieces appearing in a fixed order. The results showed that even simple games like Tetris demonstrate significant complexity in the available game states and that while some users displayed repeatable strategic behaviour, others were effectively random in their behaviours exhibiting no discernible strategy or repeatable behaviour. However, some pieces and gameboard scenarios encouraged users to exhibit behaviours that are more unique than others
|
User Identification Using Games
|
user identification using games
|
digital authentication username password imperfect system. notion videogames tetris supplement traditional authentication validation. undertaken tetris randomly ordered pieces pieces appearing order. games tetris game displayed repeatable strategic effectively behaviours exhibiting discernible repeatable behaviour. pieces gameboard scenarios encouraged exhibit behaviours
|
exact_dup
|
[
"74410860"
] |
147422243
|
10.1103/PhysRevB.69.155305
|
LnCuOCh (Ln=lanthanide, Ch=chalcogen) layered oxychalcogenides are wide-gap p-type semiconductors composed of alternately stacked (Ln2O2)2+ oxide layers and (Cu2Ch2)2- chalcogenide layers. Energy band calculations revealed that Cu-Ch hybridized bands only spread in the (Cu2Ch2)2- layers, which suggests that hole carriers in these bands are confined by the potential barriers formed by the (Ln2O2)2+ layers. Stepwise absorption spectra of a series of LnCuOCh experimentally verified that an exciton in the (Cu2Ch2)2- layers shows a two-dimensional behavior. These theoretical and experimental results indicate that LnCuOCh has “natural multiple quantum wells” built into its layered structure
|
Single-atomic-layered quantum wells built in wide-gap semiconductors LnCuOCh (Ln=lanthanide, Ch=chalcogen)
|
single-atomic-layered quantum wells built in wide-gap semiconductors lncuoch (ln=lanthanide, ch=chalcogen)
|
lncuoch lanthanide chalcogen layered oxychalcogenides semiconductors composed alternately stacked oxide chalcogenide layers. hybridized spread carriers confined barriers layers. stepwise lncuoch experimentally verified exciton behavior. lncuoch “natural wells” built layered
|
exact_dup
|
[
"59244436"
] |
147610281
|
10.1007/978-3-319-64218-5_15
|
Public speaking anxiety is a type of social phobia, which might be commonly seen in novice software engineers. It is usually triggered by a fear of social performance especially when the performer is unfamiliar with the audience. Today, many software engineering activities (e.g. code inspection, peer review, daily meetings, etc.) require social gatherings where individuals need to present their work. However, novice software engineers may not be able to reduce their performance anxiety during their course of education. In this study, we propose a vir- tual reality approach to construct a practice environment for improving novice software engineers’ pubic speaking experiences. Consequently, we examine the effects of virtual reality intervention on the public speaking experience of six novice software engineers from a computer engineering department. We designed a virtual auditorium to simulate the presentation delivery environment and findings suggest that using this infrastructre for training purposes can reduce presenter anxiety levels which is consistent with related published studies. We believe that this virtual auditorium environment can deliver benefits for students and practitioners alike in terms of addressing the anxiety that is often associated with early stage career presenter
|
Overcoming public speaking anxiety of software engineers using virtual reality exposure therapy.
|
overcoming public speaking anxiety of software engineers using virtual reality exposure therapy.
|
speaking anxiety phobia commonly novice engineers. triggered fear performer unfamiliar audience. today e.g. inspection peer meetings etc. gatherings work. novice engineers anxiety education. propose tual reality improving novice engineers’ pubic speaking experiences. examine virtual reality speaking novice engineers department. virtual auditorium simulate presentation delivery infrastructre purposes presenter anxiety studies. believe virtual auditorium deliver benefits practitioners alike addressing anxiety career presenter
|
exact_dup
|
[
"95876283"
] |
148653377
|
10.1063/1.3014035
|
A semiclassical method is developed to calculate the energy absorption of an electronic system located in the near field of a metal nanoparticle sustaining surface plasmons. The results are found to be similar to those of photon absorption from ordinary transversal radiation. However, they are affected by a geometrical factor that can increase the absorption by several orders of magnitude. As example, we investigate ellipsoidal-shaped metal nanoparticles which, under favorable conditions, may provide near field aborption enhancements almost as large as 104, and in many cases above 10
|
Light absorption in the near field around surface plasmon polaritons
|
light absorption in the near field around surface plasmon polaritons
|
semiclassical nanoparticle sustaining plasmons. ordinary transversal radiation. geometrical orders magnitude. ellipsoidal shaped nanoparticles favorable aborption enhancements
|
exact_dup
|
[
"11991986"
] |
148655649
|
10.1016/j.jcp.2009.06.011
|
A methodology based on spectral collocation numerical methods for global flow stability analysis of incompressible external flows is presented. A potential shortcoming of spectral methods, namely the handling of the complex geometries encountered in global stability analysis, has been dealt with successfully in past works by the development of spectral-element methods on unstructured meshes. The present contribution shows that a certain degree of regularity of the geometry may be exploited in order to build a global stability analysis approach based on a regular spectral rectangular grid in curvilinear coordinates and conformal mappings. The derivation of the stability linear operator in curvilinear coordinates is presented along with the discretisation method. Unlike common practice to the solution of the same problem, the matrix discretising the eigenvalue problem is formed and stored. Subspace iteration and massive parallelisation are used in order to recover a wide window of its leading Ritz system. The method is applied to two external flows, both of which are lifting bodies with separation occurring just downstream of the leading edge. Specifically the flow configurations are a NACA 0015 airfoil, and an ellipse of aspect ratio 8 chosen to closely approximate the geometry of the airfoil. Both flow configurations are at an angle of attack of 18, with a Reynolds number based on the chord length of 200. The results of the stability analysis for both geometries are presented and illustrate analogous features
|
BiGlobal stability analysis in curvilinear coordinates of massively separated lifting bodies
|
biglobal stability analysis in curvilinear coordinates of massively separated lifting bodies
|
methodology collocation incompressible flows presented. shortcoming handling geometries encountered dealt successfully unstructured meshes. regularity exploited build rectangular curvilinear conformal mappings. derivation curvilinear discretisation method. unlike discretising eigenvalue stored. subspace iteration massive parallelisation recover window ritz system. flows lifting bodies occurring downstream edge. configurations naca airfoil ellipse aspect closely approximate airfoil. configurations attack reynolds chord geometries illustrate analogous
|
exact_dup
|
[
"11994365"
] |
148656084
|
10.1046/j.1365-313X.1997.00605.x
|
Purified lipid transfer protein LTP2 from barley applied on tobacco leaves eliminated symptoms caused by infiltration of Pseudomonas syringae pv. tabaci 153. Growth of the pathogen in leaves of transgenic tobacco plants was retarded when compared with non-transformed controls. The percentage of inoculation points that showed necrotic lesions was greatly reduced in transgenic tobacco 17–38% versus 78%) and the average size of these lesions was 61–81% that of control. The average total lesion area (necrosis and chlorosis) in the transgenic plants was also reduced (38% of control). Arabidopsis thaliana transgenic plants inoculated with P. syringae pv. tomato DC3000 also had lower percentages of necrotic lesions (22–38% versus 76%), a reduced average area for each lesion (53–67% of control), and a smaller total lesion area per inoculation (43% of control). These results further support the assignment of a defense role for LTPs and highlight their biotechnological potential
|
Enhanced tolerance to bacterial pathogens caused by the transgenic expression of barley lipid transfer protein LTP2
|
enhanced tolerance to bacterial pathogens caused by the transgenic expression of barley lipid transfer protein ltp2
|
purified barley tobacco leaves eliminated infiltration pseudomonas syringae tabaci pathogen leaves transgenic tobacco retarded transformed controls. inoculation necrotic lesions greatly transgenic tobacco lesions control. lesion necrosis chlorosis transgenic arabidopsis thaliana transgenic inoculated syringae tomato percentages necrotic lesions lesion lesion inoculation assignment defense ltps highlight biotechnological
|
exact_dup
|
[
"11994788"
] |
148660106
|
10.1016/j.solener.2009.03.016
|
A two-dimensional finite element model of current flow in the front surface of a PV cell is presented. In order to validate this model we perform an experimental test. Later, particular attention is paid to the effects of non-uniform illumination in the finger direction which is typical in a linear concentrator system. Fill factor, open circuit voltage and efficiency are shown to decrease with increasing degree of non-uniform illumination. It is shown that these detrimental effects can be mitigated significantly by reoptimization of the number of front surface metallization fingers to suit the degree of non-uniformity. The behavior of current flow in the front surface of a cell operating at open circuit voltage under non-uniform illumination is discussed in detail
|
A two-dimensional finite element model of front surface current flow in cells under non-uniform, concentrated illumination
|
a two-dimensional finite element model of front surface current flow in cells under non-uniform, concentrated illumination
|
front presented. validate test. paid illumination finger concentrator system. fill circuit illumination. detrimental mitigated reoptimization front metallization fingers suit uniformity. front operating circuit illumination
|
exact_dup
|
[
"11996012"
] |
148660795
|
10.1007/s00224-009-9223-5
|
In this paper we generalize the Continuous Adversarial Queuing Theory (CAQT) model (Blesa et al. in MFCS, Lecture Notes in Computer Science, vol. 3618, pp. 144–155, 2005) by considering the possibility that the router clocks in the network are not synchronized. We name the new model Non Synchronized CAQT (NSCAQT). Clearly, this new extension to the model only affects those scheduling policies that use some form of timing. In a first approach we consider the case in which although not synchronized, all clocks run at the same speed, maintaining constant differences. In this case we show that all universally stable policies in CAQT that use the injection time and the remaining path to schedule packets remain universally stable. These policies include, for instance, Shortest in System (SIS) and Longest in System (LIS). Then, we study the case in which clock differences can vary over time, but the maximum difference is bounded. In this model we show the universal stability of two families of policies related to SIS and LIS respectively (the priority of a packet in these policies depends on the arrival time and a function of the path traversed). The bounds we obtain in this case depend on the maximum difference between clocks. This is a necessary requirement, since we also show that LIS is not universally stable in systems without bounded clock difference. We then present a new policy that we call Longest in Queues (LIQ), which gives priority to the packet that has been waiting the longest in edge queues. This policy is universally stable and, if clocks maintain constant differences, the bounds we prove do not depend on them. To finish, we provide with simulation results that compare the behavior of some of these policies in a network with stochastic injection of packets
|
Performance of Scheduling Policies in Adversarial\ud
Networks with Non-synchronized Clocks
|
performance of scheduling policies in adversarial\ud networks with non-synchronized clocks
|
generalize adversarial queuing caqt blesa mfcs router clocks synchronized. name synchronized caqt nscaqt affects scheduling policies timing. synchronized clocks maintaining differences. universally policies caqt injection schedule packets universally stable. policies shortest longest clock vary bounded. universal families policies priority packet policies arrival traversed bounds clocks. requirement universally clock difference. call longest queues priority packet waiting longest queues. universally clocks maintain bounds them. finish policies stochastic injection packets
|
exact_dup
|
[
"11999405"
] |
148663461
|
10.1016/j.cities.2011.11.002
|
Urban areas benefit from significant improvements in accessibility when a new high speed rail (HSR) project is built. These improvements, which are due mainly to a rise in efficiency, produce locational advantagesand increase the attractiveness of these cities, thereby possibly enhancing their competitivenessand economic growth. However, there may be equity issues at stake, as the main accessibility benefits are primarily concentrated in urban areas with a HSR station, whereas other locations obtain only limited benefits. HSR extensions may contribute to an increase in spatial imbalance and lead to more polarized patterns of spatial development. Procedures for assessing the spatial impacts of HSR must therefore follow a twofold approach which addresses issues of both efficiency and equity. This analysis can be made by jointly assessing both the magnitude and distribution of the accessibility improvements deriving from a HSR project. This paper describes an assessment methodology for HSR projects which follows this twofold approach. The procedure uses spatial impact analysis techniques and is based on the computation of accessibility indicators, supported by a Geographical Information System (GIS). Efficiency impacts are assessed in terms of the improvements in accessibility resulting from the HSR project, with a focus on major urban areas; and spatial equity implications are derived from changes in the distribution of accessibility values among these urban agglomerations
|
Efficiency and spatial equity impacts of high-speed rail extensions in urban areas
|
efficiency and spatial equity impacts of high-speed rail extensions in urban areas
|
benefit improvements accessibility rail built. improvements locational advantagesand attractiveness cities thereby possibly enhancing competitivenessand growth. equity stake accessibility benefits primarily concentrated station locations benefits. extensions imbalance polarized development. assessing impacts twofold addresses equity. jointly assessing accessibility improvements deriving project. describes methodology projects twofold approach. accessibility indicators geographical impacts improvements accessibility equity accessibility agglomerations
|
exact_dup
|
[
"18424053"
] |
148663779
|
10.1007/s00170-012-4562-9
|
There are many industries that use highly technological solutions to improve quality in all of their products. The steel industry is one example. Several automatic surface-inspection systems are used in the steel industry to identify various types of defects and to help operators decide whether to accept, reroute, or downgrade the material, subject to the assessment process. This paper focuses on promoting a strategy that considers all defects in an integrated fashion. It does this by managing the uncertainty about the exact position of a defect due to different process conditions by means of Gaussian additive influence functions. The relevance of the approach is in making possible consistency and reliability between surface inspection systems. The results obtained are an increase in confidence in the automatic inspection system and an ability to introduce improved prediction and advanced routing models. The prediction is provided to technical operators to help them in their decision-making process. It shows the increase in improvement gained by reducing the 40 % of coils that are downgraded at the hot strip mill because of specific defects. In addition, this technology facilitates an increase of 50 % in the accuracy of the estimate of defect survival after the cleaning facility in comparison to the former approach. The proposed technology is implemented by means of software-based, multi-agent solutions. It makes possible the independent treatment of information, presentation, quality analysis, and other relevant functions
|
Advanced predictive quality control strategy involving different facilities
|
advanced predictive quality control strategy involving different facilities
|
industries technological products. steel example. automatic inspection steel defects decide accept reroute downgrade process. focuses promoting considers defects fashion. managing defect additive functions. relevance consistency reliability inspection systems. confidence automatic inspection advanced routing models. process. gained reducing coils downgraded strip mill defects. facilitates defect cleaning facility former approach. implemented agent solutions. presentation
|
exact_dup
|
[
"18424105"
] |
148663856
|
10.1016/j.crme.2012.10.027
|
A PIV-based system has been set-up for the simultaneous measurement of the local burning velocity of premixed flames and the flame stretch due to the flame front curvature and the incoming flow strain rate. For moderately short jet flames, these measurements allow an indirect determination of the Markstein length, according to Clavin and Joulin (C–J) theory. For tall flames, the flame curvature becomes relatively large in a region around the tip where the C–J theory breaks down. However, our experiments confirm the appearance of a new linear relation between burning velocity and curvature at the flame tip. This relation defines a new proportionality factor which is probably associated to the evolution from rounded tips to slender tips when the jet velocity is increased
|
Local burning velocity in a Bunsen jet flame
|
local burning velocity in a bunsen jet flame
|
simultaneous burning premixed flames flame stretch flame front curvature incoming rate. moderately flames indirect markstein clavin joulin theory. tall flames flame curvature breaks down. confirm appearance burning curvature flame tip. defines proportionality probably rounded tips slender tips
|
exact_dup
|
[
"33170749"
] |
148663876
|
10.1002/nag.1610130606
|
A boundary element approach for time harmonic axisymmetric problems using the complete space point load fundamental solution is presented. The fundamental solution is integrated numerically along the azimuthal co-ordinate of each axisymmetric element. To increase the accuracy of the numerical integration a simple co-ordinate transformation is proposed. The approach is applied to the computation of the dynamic stiffness functions of rigid circular foundations on layered viscoelastic soils. Three different sites are considered: a uniform half-space, a soil layer on a half-space, and a soil consisting of four horizontal layers and a compliant half-space. The numerical results obtained by the proposed approach for surface circular foundations are very close to corresponding published results obtained by different procedures
|
Boundary element approach to the dynamic stiffness functions of circular foundations
|
boundary element approach to the dynamic stiffness functions of circular foundations
|
harmonic axisymmetric presented. numerically azimuthal ordinate axisymmetric element. ordinate proposed. stiffness rigid circular foundations layered viscoelastic soils. consisting compliant space. circular foundations
|
exact_dup
|
[
"12002274"
] |
148663999
|
10.1016/j.eswa.2011.11.104
|
Current development platforms for designing spoken dialog services feature different kinds of strategies to help designers build, test, and deploy their applications. In general, these platforms are made up of several assistants that handle the different design stages (e.g. definition of the dialog flow, prompt and grammar definition, database connection, or to debug and test the running of the application). In spite of all the advances in this area, in general the process of designing spoken-based dialog services is a time consuming task that needs to be accelerated. In this paper we describe a complete development platform that reduces the design time by using different types of acceleration strategies based on using information from the data model structure and database contents, as well as cumulative information obtained throughout the successive steps in the design. Thanks to these accelerations, the interaction with the platform is simplified and the design is reduced, in most cases, to simple confirmations to the “proposals” that the platform automatically provides at each stage.\ud
\ud
Different kinds of proposals are available to complete the application flow such as the possibility of selecting which information slots should be requested to the user together, predefined templates for common dialogs, the most probable actions that make up each state defined in the flow, different solutions to solve specific speech-modality problems such as the presentation of the lists of retrieved results after querying the backend database. The platform also includes accelerations for creating speech grammars and prompts, and the SQL queries for accessing the database at runtime.\ud
\ud
Finally, we will describe the setup and results obtained in a simultaneous summative, subjective and objective evaluations with different designers used to test the usability of the proposed accelerations as well as their contribution to reducing the design time and interaction
|
Application of backend database contents and structure to the design of spoken dialog services
|
application of backend database contents and structure to the design of spoken dialog services
|
platforms designing spoken dialog kinds designers build deploy applications. platforms assistants handle e.g. dialog prompt grammar connection debug running spite advances designing spoken dialog consuming accelerated. platform reduces acceleration contents cumulative successive design. thanks accelerations platform simplified confirmations “proposals” platform automatically stage. kinds proposals selecting slots requested predefined templates dialogs probable solve speech modality presentation lists retrieved querying backend database. platform accelerations creating speech grammars prompts queries accessing runtime. setup simultaneous summative subjective evaluations designers usability accelerations reducing
|
exact_dup
|
[
"12002349"
] |
148664345
|
10.1007/s00422-012-0506-6
|
This paper addresses the question of maximizing classifier accuracy for classifying task-related mental activity from Magnetoencelophalography (MEG) data. We propose the use of different sources of information and introduce an automatic channel selection procedure. To determine an informative set of channels, our approach combines a variety of machine learning algorithms: feature subset selection methods, classifiers based on regularized logistic regression, information fusion, and multiobjective optimization based on probabilistic modeling of the search space. The experimental results show that our proposal is able to improve classification accuracy compared to approaches whose classifiers use only one type of MEG information or for which the set of channels is fixed a priori
|
Regularized logistic regression and multi-objective variable selection for classifying MEG data
|
regularized logistic regression and multi-objective variable selection for classifying meg data
|
addresses maximizing classifier classifying magnetoencelophalography data. propose automatic procedure. informative combines machine classifiers regularized logistic fusion multiobjective probabilistic space. proposal classifiers priori
|
exact_dup
|
[
"12002571"
] |
148677070
|
10.1007/978-3-319-03653-3_45
|
This paper establishes an approach to external force estimation through the use of a mathematical model and current sensing, without employing a force/torque sensor. The advantages and need for force feedback have been well established in the field of telerobotics. This paper presents the requirement for sensorless force estimation and comparative results between a force sensor and the presented approach using an industrial robot. The approach presents not only a cost effective solution but also a solution for force sensing in hazardous environments, especially ionizing radiation prone environments where the dose rates limit the use of sensing equipment. The paper also discusses the applications and advantages presented by this work in various fields
|
External force estimation for telerobotics without force sensor
|
external force estimation for telerobotics without force sensor
|
establishes mathematical sensing employing torque sensor. advantages telerobotics. presents requirement sensorless comparative sensor industrial robot. presents sensing hazardous environments ionizing prone environments sensing equipment. discusses advantages
|
exact_dup
|
[
"84138530"
] |
148680836
|
10.1016/j.jpdc.2015.05.007
|
ABSTRACT\ud
\ud
This paper is on homonymous distributed systems where processes are prone to crash failures and have no\ud
initial knowledge of the system membership (‘‘homonymous’’ means that several processes may have the same identifier). New classes of failure detectors suited to these systems are first defined. Among them, the classes HΩ and HΣ are introduced that are the homonymous counterparts of the Classes Ω and Σ, respectively. (Recall that the pair ⟨Ω, Σ⟩ defines the weakest failure detector to solve consensus.) Then, the paper shows how HΩ and HΣ can be implemented in homonymous systems without membership knowledge (under different synchrony requirements). Finally, two algorithms are presented that use these failure detectors to solve consensus in homonymous asynchronous systems where there is no initial knowledge of the membership. One algorithm solves consensus with ⟨HΩ, HΣ⟩, while the other uses only\ud
HΩ, but needs a majority of correct processes.\ud
Observe that the systems with unique identifiers and anonymous systems are extreme cases of\ud
homonymous systems from which follows that all these results also apply to these systems. Interestingly, the new failure detector class HΩ can be implemented with partial synchrony (i.e., all messages sent after some bounded time GST will be received after at most an unknown bounded latency δ), while the analogous class AΩ defined for anonymous systems cannot be implemented (even in synchronous systems). Hence, the paper provides the first consensus algorithm for anonymous systems with this model of partial synchrony and a majority of correct processes
|
Failure detectors in homonymous distributed systems (with an application to consensus)
|
failure detectors in homonymous distributed systems (with an application to consensus)
|
homonymous prone crash failures membership ‘‘homonymous’’ identifier detectors suited defined. homonymous counterparts respectively. defines weakest solve consensus. implemented homonymous membership synchrony detectors solve consensus homonymous asynchronous membership. solves consensus majority processes. identifiers anonymous extreme homonymous systems. interestingly implemented synchrony i.e. messages sent unknown latency analogous anonymous implemented synchronous consensus anonymous synchrony majority
|
exact_dup
|
[
"80739200"
] |
148681885
|
10.1016/j.knosys.2014.02.018
|
Several methodologies based on ISO/IEC 27000 international standard have been developed to deal with risk analysis in information systems (IS). These methodologies do not, however, consider imprecise valuations, but use precise values on different, usually percentage, scales. We propose an extension of the MAGERIT methodology based on classical fuzzy computational models. A linguistic term scale is used to represent asset values, their dependencies and frequency and asset degradation associated with threats. Computations are based on trapezoidal fuzzy numbers associated with linguistic terms. A similarity function is used to associate a linguistic term on the previously defined scale to the trapezoidal fuzzy numbers resulting from computations. Finally, regarding the selection of preventive safeguards to reduce risks in IS, we propose a dynamic programming-based method that incorporates simulated annealing to tackle optimizations problems with the aim of minimizing costs while keeping the risk at acceptable levels. An example of an administrative unit using in-house and third-party information systems internally and to provide public information services is used to illustrate the methodology
|
Risk analysis in information systems: a fuzzification of the MAGERIT Methodology
|
risk analysis in information systems: a fuzzification of the magerit methodology
|
methodologies deal methodologies imprecise valuations precise scales. propose magerit methodology fuzzy models. linguistic asset dependencies asset degradation threats. computations trapezoidal fuzzy linguistic terms. similarity associate linguistic trapezoidal fuzzy computations. preventive safeguards risks propose programming incorporates annealing tackle optimizations minimizing keeping acceptable levels. administrative house party internally illustrate methodology
|
exact_dup
|
[
"78495880"
] |
148759171
|
10.1075/intp.10.2.03alb
|
The paper applies cognitive theories of text and language processing, and in particular relevance theory, to the analysis of notes in consecutive interpreting. In contrast to the pre-cognitive view, in which note-taking is seen mainly as a memory-supporting technique, the process of note-taking is described as the reception and production of a notation text. Adding the relevance-theoretical constructs of explicature and implicature to the general account of cognitive text processing as coherence building and the construction of a mental representation at local and global levels, this approach allows for the comparison of source, notation and target texts with respect to the underlying propositional representation, and shows how the sense of highly fragmentary notation texts is recovered in consecutive interpreting. The paper is based on an empirical study involving consecutive interpretations (English–German) by five trainee interpreters. The analysis shows that the interpreters operate relatively closely along micropropositional lines when processing the source, notation and target texts, with the explicature regularly having the same propositional form as the corresponding proposition in the source text.
|
(Non-)Sense in note-taking for consecutive interpreting
|
(non-)sense in note-taking for consecutive interpreting
|
applies relevance notes consecutive interpreting. supporting reception notation text. adding relevance constructs explicature implicature coherence notation texts propositional fragmentary notation texts recovered consecutive interpreting. involving consecutive interpretations english–german trainee interpreters. interpreters operate closely micropropositional notation texts explicature regularly propositional text.
|
exact_dup
|
[
"149227526"
] |
152155110
|
10.1103/PhysRevLett.102.162503
|
The experiment was performed at the Centre de Recherches du Cyclotron at Louvain-la-Neuve (Belgium) using a 19Ne6+ radioactive beam.International audienceSix proton-emitting states in 19Ne were studied through the inelastic scattering reaction H(19Ne; p)19Ne*(p)18F. Their energies and widths were derived from the protons detected at zero degree, while proton-proton angular correlations between the detector at zero degree and a segmented annular detector were used to determine their spin value. Besides the known states, a new broad J = 1/2 resonance has been evidenced at Ex ≈ 7.9 MeV, ≈ 1:45 MeV above the proton emission threshold. By introducing this resonance, the 18F(p; alpha)15O destruction rate in novae is significantly enhanced. This reduces the chance to observe the cosmic gamma-ray emission of 18F from novae in space telescopes
|
Discovery of a new broad resonance in $^{19}$Ne: Implications for the destruction of the cosmic $\gamma$-ray emitter $^{18}$F
|
discovery of a new broad resonance in $^{19}$ne: implications for the destruction of the cosmic $\gamma$-ray emitter $^{18}$f
|
recherches cyclotron louvain neuve belgium radioactive beam.international audiencesix proton emitting inelastic widths protons proton proton segmented annular value. besides broad evidenced proton threshold. introducing alpha destruction novae enhanced. reduces chance cosmic gamma novae telescopes
|
exact_dup
|
[
"46772775",
"52697999"
] |
152209216
|
10.1088/1751-8113/41/37/375302
|
Dedicated to the memory of Moshé Flato on the occasion of the tenth anniversary of his death.The parentage between Weyl pairs, generalized Pauli group and unitary group is investigated in detail. We start from an abstract definition of the Heisenberg-Weyl group on the field R and then switch to the discrete Heisenberg-Weyl group or generalized Pauli group on a finite ring Z_d. The main characteristics of the latter group, an abstract group of order d**3 noted P_d, are given (conjugacy classes and irreducible representation classes or equivalently Lie algebra of dimension d**3 associated with P_d). Leaving the abstract sector, a set of Weyl pairs in dimension d is derived from a polar decomposition of SU(2) closely connected to angular momentum theory. Then, a realization of the generalized Pauli group P_d and the construction of generalized Pauli matrices in dimension d are revisited in terms of Weyl pairs. Finally, the Lie algebra of the unitary group U(d) is obtained as a subalgebra of the Lie algebra associated with P_d. This leads to a development of the Lie algebra of U(d) in a basis consisting of d**2 generalized Pauli matrices. In the case where d is a power of a prime integer, the Lie algebra of SU(d) can be decomposed into d-1 Cartan subalgebras
|
Variations on a theme of Heisenberg, Pauli and Weyl
|
variations on a theme of heisenberg, pauli and weyl
|
dedicated moshé flato occasion tenth anniversary death.the parentage weyl pauli unitary detail. heisenberg weyl switch heisenberg weyl pauli conjugacy irreducible equivalently leaving weyl polar decomposition closely theory. realization pauli pauli revisited weyl pairs. unitary subalgebra consisting pauli matrices. prime integer decomposed cartan subalgebras
|
exact_dup
|
[
"46774280"
] |
152379611
|
10.1016/j.nuclphysa.2006.02.001
|
soumis à Nuclear Physics AThe masses of $^{72-78,80,82,86}$Kr were measured directly with the ISOLTRAP Penning trap mass spectrometer at ISOLDE/CERN. For all these nuclides, the measurements yielded mass uncertainties below 10 keV. The ISOLTRAP mass values for $^{72-75}$Kr outweighed previous results obtained by means of other techniques, and thus completely determine the new values in the Atomic-Mass Evaluation. Besides the interest of these masses for nuclear astrophysics, nuclear structure studies, and Standard Model tests, these results constitute a valuable and accurate input to improve mass models. In this paper, we present the mass measurements and discuss the mass evaluation for these Kr isotopes
|
Accurate mass measurements on neutron-deficient krypton isotopes
|
accurate mass measurements on neutron-deficient krypton isotopes
|
soumis athe isoltrap penning trap spectrometer isolde cern. nuclides yielded kev. isoltrap outweighed evaluation. besides astrophysics constitute valuable models. isotopes
|
exact_dup
|
[
"46780663",
"52473644"
] |
152387724
|
10.1016/j.nuclphysa.2005.08.014
|
The atomic masses of $^{76,77,80,81}$Sr and $^{129,130,131,132}$Sn were measured by means of the Penning trap mass spectrometer ISOLTRAP at ISOLDE/CERN. $^{76}$Sr is now the heaviest N = Z nucleus for which the mass is measured to a precision better than 35 keV. For the tin isotopes in the close vicinity of the doubly magic nucleus $^{132}$Sn, mass uncertainties below 20 keV were achieved. An atomic mass evaluation was carried out taking other experimental mass values into account by performing a least-squares adjustment. Some discrepancies between older experimental values and the ones reported here emerged and were resolved. The results of the new adjustment and their impact will be presented
|
Mass measurements on neutron-deficient Sr and neutron-rich Sn isotopes with the ISOLTRAP mass spectrometer
|
mass measurements on neutron-deficient sr and neutron-rich sn isotopes with the isoltrap mass spectrometer
|
penning trap spectrometer isoltrap isolde cern. heaviest nucleus precision kev. isotopes vicinity doubly magic nucleus achieved. performing squares adjustment. discrepancies older emerged resolved. adjustment
|
exact_dup
|
[
"46781325"
] |
154669129
|
10.1016/j.jrurstud.2010.11.001
|
-Evidence is emerging from across Europe that contemporary agri-environmental schemes are having only limited, if any, influence on farmers’ long-term attitudes towards the environment. In this theoretical paper we argue that these approaches are not ‘culturally sustainable’, i.e. the actions are not becoming embedded within farming cultures as part of conventional ‘good farming’ practice. We propose (following Bourdieu) that, in order to culturally embed the environmental values, beliefs and knowledges that underlie such schemes, policy-makers need to devise approaches that allow the creation of cultural and social capital within farming communities – rather than simply compensating for economic capital lost. We outline the theoretical basis of our position and discuss how the contemporary agri-environmental approach of paying for specified environmental management services restricts the ability of such schemes to generate cultural and, thereby, social capital. Finally, we outline two possible ways of accounting for cultural capital in scheme creation: either through the development of measures of cultural capital that enable its incorporation into contemporary economic models or through a major revision to the way we construct and apply agri-environmental schemes.the Foundation for Research Science and Technology, New Zealand, and the Research Council of Norway as part of the AGRIPOL project (in association with the Centre for Rural Research
|
Creating culturally sustainable agri-environmental schemes
|
creating culturally sustainable agri-environmental schemes
|
emerging europe contemporary agri schemes farmers’ attitudes environment. argue ‘culturally sustainable’ i.e. becoming embedded farming cultures ‘good farming’ practice. propose bourdieu culturally embed beliefs knowledges underlie schemes makers devise creation cultural capital farming communities compensating capital lost. outline contemporary agri paying specified restricts schemes cultural thereby capital. outline ways accounting cultural capital creation cultural capital enable incorporation contemporary revision agri schemes.the foundation zealand council norway agripol rural
|
exact_dup
|
[
"52130273"
] |
160113691
|
10.1007/s11229-017-1522-9
|
On standard accounts of scientific theorizing, the role of idealizations is to facilitate the analysis of some real world system by employing a simplified representation of the target system, raising the obvious worry about how reliable knowledge can be obtained from inaccurate descriptions. The idealizations involved in the Aharonov-Bohm (AB) effect do not, it is claimed, fit this paradigm; rather the target system is a fictional system characterized by features that, though physically possible, are not realized in the actual world. The point of studying such a fictional system is to understand the foundations of quantum mechanics and how its predictions depart from those of classical mechanics. The original worry about the use of idealizations is replaced by a new one; namely, how can actual world experiments serve to confirm the AB effect if it concerns the behavior of a fictional system? Struggle with this issue helps to account for the fact that almost three decades elapsed before a consensus emerged that the predicted AB effect had received solid experimental support. Standard accounts of idealizations tout the role they play in making tractable the analysis of the target system; by contrast, the idealizations involved in the AB effect make its analysis both conceptually and mathematically challenging. The idealizations required for the AB effect are also responsible for the existence of unitarily inequivalent representations of the canonical commutation relations and of the current algebra, representations which an observer confined to the electron's configuration space could invoke to `explain' AB-type effect without the need to posit a hidden magnetic field. The goal of this paper is to bring to the attention of the philosophers of science these and other aspects of the AB effect which are neglected or inadequately treated in literature
|
The Role of Idealizations in the Aharonov-Bom Effect
|
the role of idealizations in the aharonov-bom effect
|
accounts theorizing idealizations facilitate employing simplified raising obvious worry reliable inaccurate descriptions. idealizations aharonov bohm claimed paradigm fictional physically realized world. studying fictional foundations mechanics depart mechanics. worry idealizations replaced serve confirm concerns fictional struggle helps decades elapsed consensus emerged support. accounts idealizations tout tractable idealizations conceptually mathematically challenging. idealizations unitarily inequivalent representations canonical commutation representations observer confined invoke posit hidden field. goal bring philosophers neglected inadequately
|
exact_dup
|
[
"157867785"
] |
160503349
|
10.1016/j.cep.2017.07.024
|
The use of continuous flow microreactors offers an interesting approach among the process intensification tools available. Fouling in a microreactor during synthesis of industrially relevant nanoparticles was investigated. In order to achieve this, microscale synthesis of phosphated TiO2 nanoparticles from titanium(IV) isopropoxide (TTIP) and titanium(IV) butoxide (TBUT) was employed. A continuous three step process, consisting of hydrolysis of the respective alkoxide, phosphate modification and precipitation was developed. The resulting catalyst was characterized by means of nitrogen adsorption, dynamic light scattering and SEM/EDX. It was observed that TTIP resulted in massive fouling, while a stable process was possible with TBUT. This was related to the nucleation time of the particles. The particle size directly after the critical hydrolysis step was investigated. The particles formed with TTIP as a precursor (3.4 nm) were larger than those obtained from TBUT (2.4 nm). Diffusion based reactant concentration gradients within the multilamellar micromixer were calculated, and the corresponding Damköhler numbers for mixing were estimated to be 2.6∙10−3 for TBUT and 3.5∙10−2 for TTIP respectively. These numbers highlight the influence of incomplete mixing on fouling for TTIP as a precursor. Thus, our work demonstrates the necessity to consider the reaction kinetics during process intensification by miniaturization
|
Towards process intensification : remediation of fouling in continuous microscale synthesis of phosphated TiO2
|
towards process intensification : remediation of fouling in continuous microscale synthesis of phosphated tio2
|
microreactors offers intensification available. fouling microreactor industrially nanoparticles investigated. microscale phosphated nanoparticles titanium isopropoxide ttip titanium butoxide tbut employed. consisting hydrolysis respective alkoxide phosphate modification precipitation developed. catalyst nitrogen adsorption edx. ttip resulted massive fouling tbut. nucleation particles. hydrolysis investigated. ttip precursor tbut reactant gradients multilamellar micromixer damköhler tbut ttip respectively. highlight incomplete fouling ttip precursor. demonstrates necessity kinetics intensification miniaturization
|
exact_dup
|
[
"160818653"
] |
162104616
|
10.1038/s41467-017-00232-0
|
Phosphorus losses from land to water will be impacted by climate change and land management for food production, with detrimental impacts on aquatic ecosystems. Here we use a unique combination of methods to evaluate the impact of projected climate change on future phosphorus transfers, and to assess what scale of agricultural change would be needed
to mitigate these transfers. We combine novel high-frequency phosphorus flux data from three representative catchments across the UK, a new high-spatial resolution climate model,
uncertainty estimates from an ensemble of future climate simulations, two phosphorus transfer models of contrasting complexity and a simplified representation of the potential
intensification of agriculture based on expert elicitation from land managers. We show that the effect of climate change on average winter phosphorus loads (predicted increase up to
30% by 2050s) will be limited only by large-scale agricultural changes (e.g., 20–80% reduction in phosphorus inputs)
|
Major agricultural changes required to mitigate phosphorus losses under climate change
|
major agricultural changes required to mitigate phosphorus losses under climate change
|
phosphorus losses impacted detrimental impacts aquatic ecosystems. projected phosphorus transfers agricultural mitigate transfers. combine phosphorus catchments ensemble phosphorus contrasting simplified intensification agriculture expert elicitation managers. winter phosphorus loads agricultural e.g. phosphorus inputs
|
exact_dup
|
[
"96704716"
] |
16412831
|
10.1007/s10971-012-2728-4
|
Pure and quinine doped silica coatings have been prepared over sodalime glasses. The coatings were consolidated at low temperature (range 60-180 A degrees C) preserving optical activity of quinine molecule. We designed a device to test the guiding properties of the coatings. We confirmed with this device that light injected in pure silica coatings is guided over distances of meters while quinine presence induces isotropic photoluminescence. With the combined use of both type of coatings, it is possible to design light guiding devices and illuminate regions in glass elements without electronic circuits
|
Quinine doped hybrid sol-gel coatings for wave guiding and optical applications
|
quinine doped hybrid sol-gel coatings for wave guiding and optical applications
|
quinine doped silica coatings sodalime glasses. coatings consolidated preserving quinine molecule. guiding coatings. confirmed injected silica coatings guided distances meters quinine induces isotropic photoluminescence. coatings guiding devices illuminate glass circuits
|
exact_dup
|
[
"148664669",
"33105908"
] |
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