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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2,400 |
cond-mat/0106581
|
Ned S. Wingreen
|
Kenji Hirose and Ned S. Wingreen
|
Temperature Dependent Suppression of Conductance in Quantum Wires:
Anomalous Activation Energy from Pinning of the Band Edge
|
9 pages, 2 figures
| null |
10.1103/PhysRevB.64.073305
| null |
cond-mat.mes-hall
| null |
For unpolarized electrons in a clean quantum wire, density functional theory
reveals a thermally activated suppression of conductance. The activation
temperature T_A grows slowly (roughly quadratically) with gate voltage due to
pinning of the band edge at the chemical potential. Similar results were
obtained experimentally by Kristensen et al. [Phys. Rev. B62, 10950 (2000)] for
the temperature dependence of the anomalous conductance plateau near 0.7
(2e^2/h) in a quantum point contact.
|
[{'version': 'v1', 'created': 'Wed, 27 Jun 2001 22:19:46 GMT'}]
|
2009-11-07
|
[array(['Hirose', 'Kenji', ''], dtype=object)
array(['Wingreen', 'Ned S.', ''], dtype=object)]
|
2,401 |
0905.1916
|
Vitaly Ganusov
|
Vitaly V. Ganusov, Aron E. Lukacher, and Anthony M. Byers
|
Similar in vivo killing efficacy of polyoma virus-specific CD8 T cells
during acute and chronic phases of the infection
| null | null | null | null |
q-bio.PE q-bio.TO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Viral infections can be broadly divided into infections that are cleared from
the host (acute) and those that persist (chronic). Why some viruses establish
chronic infections while other do not is poorly understood. One possibility is
that the host's immune response is impaired during chronic infections and is
unable to clear the virus from the host. In this report we use a recently
proposed framework to estimate the per capita killing efficacy of CD8$^+$ T
cells, specific for the MT389 epitope of polyoma virus (PyV), which establishes
a chronic infection in mice. Surprisingly, the estimated per cell killing
efficacy of MT389-specific effector CD8$^+$ T cells during the acute phase of
the infection was very similar to the previously estimated efficacy of effector
CD8$^+$ T cells specific to lymphocytic choriomeningitis virus
(LCMV-Armstrong), which is cleared from the host. We also find that during the
chronic phase of the infection the killing efficacy of PyV-specific CD8$^+$ T
cells was only half of that of cells in the acute phase. This decrease in the
killing efficacy is again surprisingly similar to the change in the killing
efficacy of LCMV-specific CD8$^+$ T cells from the peak of the response to the
memory phase. Interestingly, we also find that PyV-specific CD8$^+$ T cells in
the chronic phase of the infection require lower doses of antigen to kill a
target cell. In summary, we find little support for the hypothesis that
persistence of infections is caused by inability of the host to mount an
efficient immune response, and that even in the presence of an efficient
CD8$^+$ T cell response, some viruses can still establish a persistent
infection.
|
[{'version': 'v1', 'created': 'Tue, 12 May 2009 17:34:52 GMT'}]
|
2009-05-13
|
[array(['Ganusov', 'Vitaly V.', ''], dtype=object)
array(['Lukacher', 'Aron E.', ''], dtype=object)
array(['Byers', 'Anthony M.', ''], dtype=object)]
|
2,402 |
1808.01267
|
Robert Bridges
|
Omar El-daghar and Erik Lundberg and Robert A. Bridges
|
EGBTER: Capturing degree distribution, clustering coefficients, and
community structure in a single random graph model
|
graph model extending BTER and GBTER, ASONAM conference paper, 2
tables, multiple images
|
IEEE/ACM ASONAM 2018, August 28-31, 2018, Barcelona, Spain
| null | null |
cs.SI physics.soc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Random graph models are important constructs for data analytic applications
as well as pure mathematical developments, as they provide capabilities for
network synthesis and principled analysis. Several models have been developed
with the aim of faithfully preserving important graph metrics and
substructures. With the goal of capturing degree distribution, clustering
coefficient, and communities in a single random graph model, we propose a new
model to address shortcomings in a progression of network modeling
capabilities. The Block Two-Level Erd{\H{o}}s-R{\'e}nyi (BTER) model of
Seshadhri et al., designed to allow prescription of expected degree and
clustering coefficient distributions, neglects community modeling, while the
Generalized BTER (GBTER) model of Bridges et al., designed to add community
modeling capabilities to BTER, struggles to faithfully represent all three
characteristics simultaneously. In this work, we fit BTER and two GBTER
configurations to several real-world networks and compare the results with that
of our new model, the Extended GBTER (EGBTER) model. Our results support that
EBGTER adds a community-modeling flexibility to BTER, while retaining a
satisfactory level of accuracy in terms of degree and clustering coefficient.
Our insights and empirical testing of previous models as well as the new model
are novel contributions to the literature.
|
[{'version': 'v1', 'created': 'Fri, 3 Aug 2018 17:29:14 GMT'}]
|
2018-08-06
|
[array(['El-daghar', 'Omar', ''], dtype=object)
array(['Lundberg', 'Erik', ''], dtype=object)
array(['Bridges', 'Robert A.', ''], dtype=object)]
|
2,403 |
1811.07039
|
Yixin Nie
|
Yixin Nie, Haonan Chen, Mohit Bansal
|
Combining Fact Extraction and Verification with Neural Semantic Matching
Networks
|
AAAI 2019
| null | null | null |
cs.CL cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The increasing concern with misinformation has stimulated research efforts on
automatic fact checking. The recently-released FEVER dataset introduced a
benchmark fact-verification task in which a system is asked to verify a claim
using evidential sentences from Wikipedia documents. In this paper, we present
a connected system consisting of three homogeneous neural semantic matching
models that conduct document retrieval, sentence selection, and claim
verification jointly for fact extraction and verification. For evidence
retrieval (document retrieval and sentence selection), unlike traditional
vector space IR models in which queries and sources are matched in some
pre-designed term vector space, we develop neural models to perform deep
semantic matching from raw textual input, assuming no intermediate term
representation and no access to structured external knowledge bases. We also
show that Pageview frequency can also help improve the performance of evidence
retrieval results, that later can be matched by using our neural semantic
matching network. For claim verification, unlike previous approaches that
simply feed upstream retrieved evidence and the claim to a natural language
inference (NLI) model, we further enhance the NLI model by providing it with
internal semantic relatedness scores (hence integrating it with the evidence
retrieval modules) and ontological WordNet features. Experiments on the FEVER
dataset indicate that (1) our neural semantic matching method outperforms
popular TF-IDF and encoder models, by significant margins on all evidence
retrieval metrics, (2) the additional relatedness score and WordNet features
improve the NLI model via better semantic awareness, and (3) by formalizing all
three subtasks as a similar semantic matching problem and improving on all
three stages, the complete model is able to achieve the state-of-the-art
results on the FEVER test set.
|
[{'version': 'v1', 'created': 'Fri, 16 Nov 2018 21:37:59 GMT'}]
|
2018-11-20
|
[array(['Nie', 'Yixin', ''], dtype=object)
array(['Chen', 'Haonan', ''], dtype=object)
array(['Bansal', 'Mohit', ''], dtype=object)]
|
2,404 |
2202.11659
|
Max Simchowitz
|
Jack Umenberger, Max Simchowitz, Juan C. Perdomo, Kaiqing Zhang, Russ
Tedrake
|
Globally Convergent Policy Search over Dynamic Filters for Output
Estimation
| null | null | null | null |
math.OC cs.DS cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce the first direct policy search algorithm which provably
converges to the globally optimal $\textit{dynamic}$ filter for the classical
problem of predicting the outputs of a linear dynamical system, given noisy,
partial observations. Despite the ubiquity of partial observability in
practice, theoretical guarantees for direct policy search algorithms, one of
the backbones of modern reinforcement learning, have proven difficult to
achieve. This is primarily due to the degeneracies which arise when optimizing
over filters that maintain internal state.
In this paper, we provide a new perspective on this challenging problem based
on the notion of $\textit{informativity}$, which intuitively requires that all
components of a filter's internal state are representative of the true state of
the underlying dynamical system. We show that informativity overcomes the
aforementioned degeneracy. Specifically, we propose a $\textit{regularizer}$
which explicitly enforces informativity, and establish that gradient descent on
this regularized objective - combined with a ``reconditioning step'' -
converges to the globally optimal cost a $\mathcal{O}(1/T)$ rate. Our analysis
relies on several new results which may be of independent interest, including a
new framework for analyzing non-convex gradient descent via convex
reformulation, and novel bounds on the solution to linear Lyapunov equations in
terms of (our quantitative measure of) informativity.
|
[{'version': 'v1', 'created': 'Wed, 23 Feb 2022 18:06:20 GMT'}
{'version': 'v2', 'created': 'Fri, 25 Feb 2022 20:06:41 GMT'}]
|
2022-03-01
|
[array(['Umenberger', 'Jack', ''], dtype=object)
array(['Simchowitz', 'Max', ''], dtype=object)
array(['Perdomo', 'Juan C.', ''], dtype=object)
array(['Zhang', 'Kaiqing', ''], dtype=object)
array(['Tedrake', 'Russ', ''], dtype=object)]
|
2,405 |
2305.06174
|
Tunazzina Islam
|
Tunazzina Islam, Ruqi Zhang, Dan Goldwasser
|
Analysis of Climate Campaigns on Social Media using Bayesian Model
Averaging
|
Accepted as a long paper at 6th AAAI/ACM Conference on AI, Ethics,
and Society 2023 (AIES-2023). Updated for camera-ready
| null | null | null |
cs.CL cs.AI cs.CY cs.LG cs.SI
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Climate change is the defining issue of our time, and we are at a defining
moment. Various interest groups, social movement organizations, and individuals
engage in collective action on this issue on social media. In addition, issue
advocacy campaigns on social media often arise in response to ongoing societal
concerns, especially those faced by energy industries. Our goal in this paper
is to analyze how those industries, their advocacy group, and climate advocacy
group use social media to influence the narrative on climate change. In this
work, we propose a minimally supervised model soup [57] approach combined with
messaging themes to identify the stances of climate ads on Facebook. Finally,
we release our stance dataset, model, and set of themes related to climate
campaigns for future work on opinion mining and the automatic detection of
climate change stances.
|
[{'version': 'v1', 'created': 'Sat, 6 May 2023 16:43:29 GMT'}
{'version': 'v2', 'created': 'Fri, 30 Jun 2023 18:06:50 GMT'}]
|
2023-07-04
|
[array(['Islam', 'Tunazzina', ''], dtype=object)
array(['Zhang', 'Ruqi', ''], dtype=object)
array(['Goldwasser', 'Dan', ''], dtype=object)]
|
2,406 |
2002.11755
|
Neil Stilin
|
Neil Stilin, Adam Holic, Matthias Liepe, Ryan Porter, James Sears
|
Stable CW Operation of Nb$_3$Sn SRF Cavity at 10 MV/m using Conduction
Cooling
|
4 pages, 4 figures
| null | null | null |
physics.acc-ph
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Superconducting radio-frequency (SRF) accelerating cavities are a promising
technology for compact, high-power, MeV-scale accelerators, providing
continuous beam operation for a wide range of potential applications in
industry, medicine, national security, and science. However, SRF cavities have
traditionally been cooled using complex and expensive cryogenic infrastructure,
which has been a significant obstacle in employing this powerful technology in
small-scale systems. With the recent progress on high-performance
Nb$_3$Sn-coated SRF cavities and the introduction of cryocoolers, which can
provide turn-key style conduction cooling below 4.2 K, this barrier can now be
overcome. At Cornell University, we have developed a prototype setup that
utilizes a commercial cryocooler to provide the necessary cooling for operation
of a 2.6 GHz Nb$_3$Sn-coated SRF cavity. We have now demonstrated first stable
operation in continuous mode at accelerating fields up to 10 MV/m with a
quality factor of Q$_0$ = 4x10$^9$, thereby achieving an important milestone in
making turn-key SRF a reality.
|
[{'version': 'v1', 'created': 'Wed, 26 Feb 2020 19:25:15 GMT'}]
|
2020-02-28
|
[array(['Stilin', 'Neil', ''], dtype=object)
array(['Holic', 'Adam', ''], dtype=object)
array(['Liepe', 'Matthias', ''], dtype=object)
array(['Porter', 'Ryan', ''], dtype=object)
array(['Sears', 'James', ''], dtype=object)]
|
2,407 |
1111.2446
|
Nils Huntemann
|
N. Huntemann, M. Okhapkin, B. Lipphardt, S. Weyers, Chr. Tamm, and E.
Peik
|
High-accuracy optical clock based on the octupole transition in 171Yb+
|
5 pages, 4 figures
|
Phys. Rev. Lett. 108, 090801 (2012)
|
10.1103/PhysRevLett.108.090801
| null |
physics.atom-ph physics.optics quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We experimentally investigate an optical frequency standard based on the 467
nm (642 THz) electric-octupole reference transition 2S1/2(F=0) -> F7/2(F=3) in
a single trapped 171Yb+ ion. The extraordinary features of this transition
result from the long natural lifetime and from the 4f136s2 configuration of the
upper state. The electric quadrupole moment of the 2F7/2 state is measured as
-0.041(5) e(a0)^2, where e is the elementary charge and a0 the Bohr radius. We
also obtain information on the differential scalar and tensorial components of
the static polarizability and of the probe light induced ac Stark shift of the
octupole transition. With a real-time extrapolation scheme that eliminates this
shift, the unperturbed transition frequency is realized with a fractional
uncertainty of 7.1x10^(-17). The frequency is measured as 642 121 496 772
645.15(52) Hz.
|
[{'version': 'v1', 'created': 'Thu, 10 Nov 2011 10:55:37 GMT'}
{'version': 'v2', 'created': 'Thu, 1 Mar 2012 10:30:08 GMT'}]
|
2012-03-02
|
[array(['Huntemann', 'N.', ''], dtype=object)
array(['Okhapkin', 'M.', ''], dtype=object)
array(['Lipphardt', 'B.', ''], dtype=object)
array(['Weyers', 'S.', ''], dtype=object)
array(['Tamm', 'Chr.', ''], dtype=object)
array(['Peik', 'E.', ''], dtype=object)]
|
2,408 |
1912.11139
|
Steven Sam
|
Steven V Sam
|
Structures in representation stability
|
9 pages
|
Notices Amer. Math. Soc. 67 (2020), no. 1, 38-43
|
10.1090/noti2011
| null |
math.AC math.AG math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Survey article on representation stability and examples in algebraic geometry
and topology, written for the Notices of the AMS.
|
[{'version': 'v1', 'created': 'Mon, 23 Dec 2019 23:08:59 GMT'}]
|
2019-12-25
|
[array(['Sam', 'Steven V', ''], dtype=object)]
|
2,409 |
1505.00607
|
Gendi Wang
|
Gendi Wang and Matti Vuorinen
|
The visual angle metric and quasiregular maps
|
14 pages, 3 figures
| null | null | null |
math.MG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The distortion of distances between points under maps is studied. We first
prove a Schwarz-type lemma for quasiregular maps of the unit disk involving the
visual angle metric. Then we investigate conversely the quasiconformality of a
bilipschitz map with respect to the visual angle metric on convex domains. For
the unit ball or half space, we prove that a bilipschitz map with respect to
the visual angle metric is also bilipschitz with respect to the hyperbolic
metric. We also obtain various inequalities relating the visual angle metric to
other metrics such as the distance ratio metric and the quasihyperbolic metric.
|
[{'version': 'v1', 'created': 'Mon, 4 May 2015 12:16:51 GMT'}
{'version': 'v2', 'created': 'Wed, 20 Jan 2016 01:02:12 GMT'}
{'version': 'v3', 'created': 'Wed, 13 Jul 2016 03:31:06 GMT'}]
|
2016-07-14
|
[array(['Wang', 'Gendi', ''], dtype=object)
array(['Vuorinen', 'Matti', ''], dtype=object)]
|
2,410 |
2112.05292
|
Luk Arnaut
|
Luk R. Arnaut
|
Fluctuations of Power versus Energy for Random Fields Near a Perfectly
Conducting Boundary
|
8 pages, 4 figures, submitted to IEEE Transactions on Electromagnetic
Compatibility
| null |
10.1109/TEMC.2021.3119602
| null |
physics.class-ph physics.data-an
|
http://creativecommons.org/licenses/by/4.0/
|
The standard deviations of the energy and Poynting power densities for an
isotropic random field near a perfectly conducting planar boundary are
characterized, based on quartic plane-wave expansions. For normal and
transverse components, different rates of decay exist as a function of
electrical distance from the boundary. At large distances, the envelopes for
the power are more strongly damped than for the energy, both showing inverse
power law decay. The decay for the standard deviation is generally one order
faster than for the corresponding mean. For the normally directed power flux,
its standard deviation near the boundary increases linearly with distance. The
relative uncertainty of the scalar power is much smaller than for the Poynting
power. Poynting's theorem for standard deviations is obtained and demonstrates
larger standard deviations of the energy imbalance and power flux than their
mean values.
|
[{'version': 'v1', 'created': 'Fri, 10 Dec 2021 01:51:35 GMT'}]
|
2021-12-13
|
[array(['Arnaut', 'Luk R.', ''], dtype=object)]
|
2,411 |
2305.19171
|
Arina Shtennikova
|
S. Mironov, A.Shtennikova
|
Perturbations in Horndeski theory above anisotropic cosmological
background
| null | null | null | null |
gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we have constructed the unconstrained action for the
perturbations above Bianchi I type background in the most general scalar-tensor
theory of gravity, the Horndeski theory. The result could be used now in the
context of anisotropic early Universe models, no-go theorems and general
stability and in anisotropic probes of current cosmological perturbations.
|
[{'version': 'v1', 'created': 'Tue, 30 May 2023 16:16:02 GMT'}]
|
2023-05-31
|
[array(['Mironov', 'S.', ''], dtype=object)
array(['Shtennikova', 'A.', ''], dtype=object)]
|
2,412 |
1312.1825
|
Mariafelicia De Laurentis Dr.
|
Salvatore Capozziello, Mariafelicia De Laurentis, Orlando Luongo and
Alan Cosimo Ruggeri
|
Cosmographic Constraints and Cosmic Fluids
|
45 pages, 1 figure
|
Galaxies 2013, 1(3), 216-260;
|
10.3390/galaxies1030216
| null |
gr-qc astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The problem of reproducing dark energy effects is reviewed here with
particular interest devoted to cosmography. We summarize some of the most
relevant cosmological models, based on the assumption that the corresponding
barotropic equations of state evolve as the universe expands, giving rise to
the accelerated expansion. We describe in detail the $\Lambda$CDM
($\Lambda$-Cold Dark Matter) and $\omega$CDM models, considering also some
specific examples, e.g., Chevallier-Polarsky-Linder, the Chaplygin gas and the
Dvali-Gabadadze-Porrati cosmological model. Finally, we consider the
cosmological consequences of $f(\mathcal{R})$ and $f(\mathcal{T})$ gravities
and their impact on the framework of cosmography. Keeping these considerations
in mind, we point out the \emph{model-independent} procedure related to
cosmography, showing how to match the series of cosmological observables to the
free parameters of each model. We critically discuss the role played by
cosmography, as a \emph{selection criterion} to check whether a particular
model passes or does not present cosmological constraints. In so doing, we find
out cosmological bounds by fitting the luminosity distance expansion of the
redshift, z, adopting the recent Union 2.1 dataset of supernovae, combined with
the baryonic acoustic oscillation and the cosmic microwave background
measurements. We perform cosmographic analyses, imposing different priors on
the Hubble rate present value. In addition, we compare our results with recent
PLANCK limits, showing that the $\Lambda$CDM and $\omega$CDM models seem to be
the favorite with respect to other dark energy models. However, we show that
cosmographic constraints on $f(\mathcal{R})$ and $f(\mathcal{T})$ cannot
discriminate between extensions of General Relativity and dark energy models,
leading to a disadvantageous degeneracy problem.
|
[{'version': 'v1', 'created': 'Fri, 6 Dec 2013 10:33:34 GMT'}]
|
2013-12-09
|
[array(['Capozziello', 'Salvatore', ''], dtype=object)
array(['De Laurentis', 'Mariafelicia', ''], dtype=object)
array(['Luongo', 'Orlando', ''], dtype=object)
array(['Ruggeri', 'Alan Cosimo', ''], dtype=object)]
|
2,413 |
cond-mat/0105395
|
Vicente Garzo
|
Vicente Garz\'o and J. W. Dufty
|
Hydrodynamics for a granular binary mixture at low density
|
to be published in Physics of Fluids
|
Phys. Fluids 14, 1476-1490 (2002)
|
10.1063/1.1458007
| null |
cond-mat.soft
| null |
Hydrodynamic equations for a binary mixture of inelastic hard spheres are
derived from the Boltzmann kinetic theory. A normal solution is obtained via
the Chapman-Enskog method for states near the local homogeneous cooling state.
The mass, heat, and momentum fluxes are determined to first order in the
spatial gradients of the hydrodynamic fields, and the associated transport
coefficients are identified. In the same way as for binary mixtures with
elastic collisions, these coefficients are determined from a set of coupled
linear integral equations. Practical evaluation is possible using a Sonine
polynomial approximation, and is illustrated here by explicit calculation of
the relevant transport coefficients: the mutual diffusion, the pressure
diffusion, the thermal diffusion, the shear viscosity, the Dufour coefficient,
the thermal conductivity, and the pressure energy coefficient. All these
coefficients are given in terms of the restitution coefficients and the ratios
of mass, concentration, and particle sizes. Interesting and new effects arise
from the fact that the reference states for the two components have different
partial temperatures, leading to additional dependencies of the transport
coefficients on the concentration. The results hold for arbitrary degree of
inelasticity and are not limited to specific values of the parameters of the
mixture. Applications of this theory will be discussed in subsequent papers.
|
[{'version': 'v1', 'created': 'Mon, 21 May 2001 09:54:11 GMT'}
{'version': 'v2', 'created': 'Wed, 5 Dec 2001 10:43:34 GMT'}]
|
2009-11-07
|
[array(['Garzó', 'Vicente', ''], dtype=object)
array(['Dufty', 'J. W.', ''], dtype=object)]
|
2,414 |
0804.3872
|
Zsolt Gulacsi
|
Zsolt Gulacsi
|
Delocalization effect of the Hubbard repulsion in exact terms and two
dimensions
|
23 pages, 8 figures. Accepted for publication in Phys. Rev. B
|
Phys. Rev. B77, 245113 (2008)
|
10.1103/PhysRevB.77.245113
| null |
cond-mat.str-el cond-mat.dis-nn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The genuine physical reasons explaining the delocalization effect of the
Hubbard repulsion U are analyzed. First it is shown that always when this
effect is observed, U acts on the background of a macroscopic degeneracy
present in a multiband type of system. After this step I demonstrate that
acting in such conditions, by strongly diminishing the double occupancy, U
spreads out the contributions in the ground state wave function, hence strongly
increases the one-particle localization length, consequently extends the
one-particle behavior producing conditions for a delocalization effect. To be
valuable, the reported results are presented in exact terms, being based on the
first exact ground states deduced at half filling in two dimensions for a
prototype two band system, the generic periodic Anderson model at finite value
of the interaction.
|
[{'version': 'v1', 'created': 'Thu, 24 Apr 2008 09:18:56 GMT'}]
|
2008-06-16
|
[array(['Gulacsi', 'Zsolt', ''], dtype=object)]
|
2,415 |
2203.10605
|
Suyun Liu
|
Suyun Liu and Luis Nunes Vicente
|
Convergence rates of the stochastic alternating algorithm for
bi-objective optimization
| null | null | null | null |
math.OC cs.NA math.NA stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Stochastic alternating algorithms for bi-objective optimization are
considered when optimizing two conflicting functions for which optimization
steps have to be applied separately for each function. Such algorithms consist
of applying a certain number of steps of gradient or subgradient descent on
each single objective at each iteration. In this paper, we show that stochastic
alternating algorithms achieve a sublinear convergence rate of
$\mathcal{O}(1/T)$, under strong convexity, for the determination of a
minimizer of a weighted-sum of the two functions, parameterized by the number
of steps applied on each of them. An extension to the convex case is presented
for which the rate weakens to $\mathcal{O}(1/\sqrt{T})$. These rates are valid
also in the non-smooth case. Importantly, by varying the proportion of steps
applied to each function, one can determine an approximation to the Pareto
front.
|
[{'version': 'v1', 'created': 'Sun, 20 Mar 2022 17:31:08 GMT'}
{'version': 'v2', 'created': 'Fri, 6 Jan 2023 06:12:13 GMT'}]
|
2023-01-09
|
[array(['Liu', 'Suyun', ''], dtype=object)
array(['Vicente', 'Luis Nunes', ''], dtype=object)]
|
2,416 |
math/0203149
|
David Bachman
|
David Bachman and Saul Schleimer
|
Thin Position for Tangles
|
6 pages, 2 figures, to appear in the Journal of Knot Theory and its
Ramifications
|
Journal of Knot Theory and its Ramifications, Vol.12, No.1 (2003)
117-122.
| null | null |
math.GT
| null |
If a tangle, K, in the 3-ball has no planar, meridional, essential surfaces
in its exterior then thin position for K has no thin levels.
|
[{'version': 'v1', 'created': 'Fri, 15 Mar 2002 07:24:54 GMT'}]
|
2007-05-23
|
[array(['Bachman', 'David', ''], dtype=object)
array(['Schleimer', 'Saul', ''], dtype=object)]
|
2,417 |
2003.03899
|
Yunnan Li
|
Li Guo, Yunnan Li, Yunhe Sheng, Guodong Zhou
|
Cohomologies, extensions and deformations of differential algebras with
any weights
|
21 pages
|
Theory Appl. Categories, Vol. 38, No. 37, 2022, pp. 1409-1433
| null | null |
math.RA math-ph math.MP math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
As an algebraic study of differential equations, differential algebras have
been studied for a century and and become an important area of mathematics. In
recent years the area has been expended to the noncommutative associative and
Lie algebra contexts and to the case when the operator identity has a weight in
order to include difference operators and difference algebras. This paper
provides a cohomology theory for differential algebras of any weights. This
gives a uniform approach to both the zero weight case which is similar to the
earlier study of differential Lie algebras, and the non-zero weight case which
poses new challenges. As applications, abelian extensions of a differential
algebra are classified by the second cohomology group. Furthermore, formal
deformations of differential algebras are obtained and the rigidity of a
differential algebra is characterized by the vanishing of the second cohomology
group.
|
[{'version': 'v1', 'created': 'Mon, 9 Mar 2020 03:03:46 GMT'}]
|
2023-02-01
|
[array(['Guo', 'Li', ''], dtype=object)
array(['Li', 'Yunnan', ''], dtype=object)
array(['Sheng', 'Yunhe', ''], dtype=object)
array(['Zhou', 'Guodong', ''], dtype=object)]
|
2,418 |
2012.14301
|
Michael Bordag
|
M. Bordag and I.G. Pirozhenko
|
The closed piecewise uniform string revisited
|
12 pages
|
Vestnik of Immanuel Kant Baltic Federal University. Series:
Physical-mathematical and technical sciences, 1, pp 51-72, 2021
| null | null |
hep-th quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We reconsider the composite string model introduced {30 years ago} to study
the vacuum energy. The model consists of a scalar field, describing the
transversal vibrations of a string consisting of piecewise constant sections
with different tensions and mass densities, keeping the speed of light constant
across the junctions. We consider the spectrum using transfer matrices and
Chebyshev polynomials to get a closed formula for the eigenfrequencies. We
calculate vacuum and free energy as well as the entropy of this system in two
approaches, one using contour integration and another one using a Hurwitz zeta
function. The latter results in a representation in terms of finite sums over
polynomials. Several limiting cases are considered as well, for instance, the
high-temperature expansion, which is expressed in terms of the heat kernel
coefficients. The vacuum energy has no ultraviolet divergences, and the
corresponding heat kernel coefficient $a_1$ is zero due to the constancy of the
speed of light. This is in parallel to a similar situation in macroscopic
electrodynamics with isorefractive boundary conditions.
|
[{'version': 'v1', 'created': 'Mon, 28 Dec 2020 15:36:52 GMT'}]
|
2023-02-21
|
[array(['Bordag', 'M.', ''], dtype=object)
array(['Pirozhenko', 'I. G.', ''], dtype=object)]
|
2,419 |
physics/0507087
|
Vladimir Kulinskii L
|
V.I. Ratushnaya, V.L. Kulinskii, A.V. Zvelindovsky, D. Bedeaux
|
Hydrodynamic Model for the System of Self Propelling Particles with
Conservative Kinematic Constraints; Two dimensional stationary solutions
|
12 pages, 1 figure
|
Physica A: Statistical Mechanics and its Applications Volume 366,
1 July 2006, Pages 107-114
|
10.1016/j.physa.2005.11.002
| null |
physics.flu-dyn
| null |
We consider a continuum model for the dynamics of systems of self propelling
particles with kinematic constraints on the velocities. The model aims to be
analogous to a discrete algorithm used in works by T. Vicsek et al. In this
paper we prove that the only types of the stationary planar solutions in the
model are either of translational or axial symmetry of the flow. Within the
proposed model we differentiate between finite and infinite flocking behavior
by the finiteness of the kinetic energy functional.
|
[{'version': 'v1', 'created': 'Tue, 12 Jul 2005 12:29:13 GMT'}]
|
2009-12-16
|
[array(['Ratushnaya', 'V. I.', ''], dtype=object)
array(['Kulinskii', 'V. L.', ''], dtype=object)
array(['Zvelindovsky', 'A. V.', ''], dtype=object)
array(['Bedeaux', 'D.', ''], dtype=object)]
|
2,420 |
1003.2046
|
Radja Boughezal
|
Radja Boughezal, Frank Petriello
|
Color-octet scalar effects on Higgs boson production in gluon fusion
|
18 pages, 6 figures, 3 tables
|
Phys.Rev.D81:114033,2010
|
10.1103/PhysRevD.81.114033
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We compute the next-to-next-to-leading order QCD corrections to the
gluon-fusion production of a Higgs boson in models with massive color-octet
scalars in the ${\bf (8,1)_0}$ representation using an effective-theory
approach. We derive a compact analytic expression for the relevant Wilson
coefficient, and explain an interesting technical aspect of the calculation
that requires inclusion of the quartic-scalar interactions at
next-to-next-to-leading order. We perform a renormalization-group analysis of
the scalar couplings to derive the allowed regions of parameter space, and
present phenomenological results for both the Tevatron and the LHC. The
modifications of the Higgs production cross section are large at both
colliders, and can increase the Standard Model rate by more than a factor of
two in allowed regions of parameter space. We estimate that stringent
constraints on the color-octet scalar parameters can be obtained using the
Tevatron exclusion limit on Higgs production.
|
[{'version': 'v1', 'created': 'Wed, 10 Mar 2010 08:43:40 GMT'}]
|
2014-11-20
|
[array(['Boughezal', 'Radja', ''], dtype=object)
array(['Petriello', 'Frank', ''], dtype=object)]
|
2,421 |
2202.08562
|
Ivan Vartanyants
|
Dmitry Lapkin, Anatoly Shabalin, Janne-Mieke Meijer, Ruslan Kurta,
Michael Sprung, Andrei V. Petukhov, Ivan A. Vartanyants
|
Angular X-ray Cross-Correlation Analysis Applied to the Scattering Data
in 3D Reciprocal Space from a Single Crystal
|
37 pages, 9 figures
| null | null | null |
cond-mat.mes-hall cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
We propose an application of the Angular X-ray Cross-Correlation Analysis
(AXCCA) to the scattered intensity distribution measured in three-dimensional
(3D) reciprocal space from a single crystalline sample. Contrary to the
conventional application of AXCCA, when averaging over many two-dimensional
(2D) diffraction patterns collected from different randomly oriented samples is
required, the proposed approach gives an insight into the structure of a single
specimen. This is particularly useful in studies of defect-reach samples that
are unlikely to have the same structure. Here, we demonstrate an example of a
qualitative structure determination of a colloidal crystal on the simulated as
well as experimentally measured 3D scattered intensity distributions.
|
[{'version': 'v1', 'created': 'Thu, 17 Feb 2022 10:13:53 GMT'}]
|
2022-02-18
|
[array(['Lapkin', 'Dmitry', ''], dtype=object)
array(['Shabalin', 'Anatoly', ''], dtype=object)
array(['Meijer', 'Janne-Mieke', ''], dtype=object)
array(['Kurta', 'Ruslan', ''], dtype=object)
array(['Sprung', 'Michael', ''], dtype=object)
array(['Petukhov', 'Andrei V.', ''], dtype=object)
array(['Vartanyants', 'Ivan A.', ''], dtype=object)]
|
2,422 |
hep-th/0303203
|
Sugumi Kanno
|
Sugumi Kanno, Jiro Soda
|
Low Energy Effective Action for Dilatonic Braneworld --A Formalism for
Inflationary Braneworld--
|
17 pages, Version to be published in General Relativity and
Gravitation
|
Gen.Rel.Grav. 36 (2004) 689-712
|
10.1023/B:GERG.0000016919.07175.92
|
KUCP0226
|
hep-th gr-qc
| null |
We derive the low energy effective action for the dilatonic braneworld. In
the case of the single-brane model, we find the effective theory is described
by the Einstein-scalar theory coupled to the dark radiation. Remarkably, the
dark radiation is not conserved in general due to a coupling to the bulk scalar
field. The effective action incorporating Kaluza-Klein (KK) corrections is
obtained and the role of the AdS/CFT correspondence in the dilatonic braneworld
is revealed. In particular, it is shown that CFT matter would not be confined
to the braneworld in the presence of the bulk scalar field. The relation
between our analysis and the geometrical projection method is also clarified.
In the case of the two-brane model, the effective theory reduces to a
scalar-tensor theory with a non-trivial coupling between the radion and the
bulk scalar field.
|
[{'version': 'v1', 'created': 'Mon, 24 Mar 2003 11:27:10 GMT'}
{'version': 'v2', 'created': 'Sat, 4 Oct 2003 11:52:30 GMT'}]
|
2009-11-10
|
[array(['Kanno', 'Sugumi', ''], dtype=object)
array(['Soda', 'Jiro', ''], dtype=object)]
|
2,423 |
1910.02615
|
Sumanjit Chakraborty
|
Sumanjit Chakraborty, Sarbani Ray, Dibyendu Sur, Abhirup Datta, Ashik
Paul
|
Effects of CME and CIR induced geomagnetic storms on low-latitude
ionization over Indian longitudes in terms of neutral dynamics
|
41 pages, 14 figures. Accepted for publication in Advances in Space
Research
|
Advances in Space Research (2020)
|
10.1016/j.asr.2019.09.047
| null |
physics.space-ph astro-ph.EP astro-ph.SR physics.geo-ph physics.plasm-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper presents the response of the ionosphere during the intense
geomagnetic storms of October 12-20, 2016 and May 26-31, 2017 which occurred
during the declining phase of the solar cycle 24. Total Electron Content (TEC)
from GPS measured at Indore, Calcutta and Siliguri having geomagnetic dips
varying from 32.23{\deg}N, 32{\deg}N and 39.49{\deg}N respectively and at the
International GNSS Service (IGS) stations at Lucknow (beyond anomaly crest),
Hyderabad (between geomagnetic equator and northern crest of EIA) and Bangalore
(near magnetic equator) in the Indian longitude zone have been used for the
storms. Prominent peaks in diurnal maximum in excess of 20-45 TECU over the
quiet time values were observed during the October 2016 storm at Lucknow,
Indore, Hyderabad, Bangalore and 10-20 TECU for the May 2017 storm at Siliguri,
Indore, Calcutta and Hyderabad. The GUVI images onboard TIMED spacecraft that
measures the thermospheric O/N2 ratio, showed high values (O/N2 ratio of about
0.7) on October 16 when positive storm effects were observed compared to the
other days during the storm period. The observed features have been explained
in terms of the O/N2 ratio increase in the equatorial thermosphere, CIR-induced
High Speed Solar Wind (HSSW) event for the October 2016 storm. The TEC
enhancement has also been explained in terms of the Auroral Electrojet (AE),
neutral wind values obtained from the Horizontal Wind Model (HWM14) and
equatorial electrojet strength from magnetometer data for both October 2016 and
May 2017 storms. These results are one of the first to be reported from the
Indian longitude sector on influence of CME- and CIR-driven geomagnetic storms
on TEC during the declining phase of solar cycle 24.
|
[{'version': 'v1', 'created': 'Mon, 7 Oct 2019 05:36:23 GMT'}
{'version': 'v2', 'created': 'Fri, 12 Jun 2020 09:38:25 GMT'}]
|
2023-02-02
|
[array(['Chakraborty', 'Sumanjit', ''], dtype=object)
array(['Ray', 'Sarbani', ''], dtype=object)
array(['Sur', 'Dibyendu', ''], dtype=object)
array(['Datta', 'Abhirup', ''], dtype=object)
array(['Paul', 'Ashik', ''], dtype=object)]
|
2,424 |
1512.03219
|
Vladislav Malyshkin
|
Vladislav Gennadievich Malyshkin
|
Norm-Free Radon-Nikodym Approach to Machine Learning
|
Cluster localization measure added. Quantum mechanics analogy
improved and expanded (density matrix exact expression added). Coverage
calculation via matrix spectrum added
| null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For Machine Learning (ML) classification problem, where a vector of
$\mathbf{x}$--observations (values of attributes) is mapped to a single $y$
value (class label), a generalized Radon--Nikodym type of solution is proposed.
Quantum--mechanics --like probability states $\psi^2(\mathbf{x})$ are
considered and "Cluster Centers", corresponding to the extremums of
$<y\psi^2(\mathbf{x})>/<\psi^2(\mathbf{x})>$, are found from generalized
eigenvalues problem. The eigenvalues give possible $y^{[i]}$ outcomes and
corresponding to them eigenvectors $\psi^{[i]}(\mathbf{x})$ define "Cluster
Centers". The projection of a $\psi$ state, localized at given $\mathbf{x}$ to
classify, on these eigenvectors define the probability of $y^{[i]}$ outcome,
thus avoiding using a norm ($L^2$ or other types), required for "quality
criteria" in a typical Machine Learning technique. A coverage of each `Cluster
Center" is calculated, what potentially allows to separate system properties
(described by $y^{[i]}$ outcomes) and system testing conditions (described by
$C^{[i]}$ coverage). As an example of such application $y$ distribution
estimator is proposed in a form of pairs $(y^{[i]},C^{[i]})$, that can be
considered as Gauss quadratures generalization. This estimator allows to
perform $y$ probability distribution estimation in a strongly non--Gaussian
case.
|
[{'version': 'v1', 'created': 'Thu, 10 Dec 2015 11:24:26 GMT'}
{'version': 'v2', 'created': 'Tue, 15 Dec 2015 19:01:18 GMT'}]
|
2015-12-16
|
[array(['Malyshkin', 'Vladislav Gennadievich', ''], dtype=object)]
|
2,425 |
1202.0603
|
Tyler J. Jarvis
|
Dan Edidin, Tyler J. Jarvis, Takashi Kimura
|
New Products, Chern Classes, and Power Operations in Orbifold K-theory
|
Withdrawn by the authors because the results of this paper are
subsumed within and improved by the two papers 1. A plethora of inertial
products and 2. Chern Classes and Compatible Power Operations in Inertial
K-theory
| null | null | null |
math.AG hep-th math.KT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Withdrawn by the authors because the results of this paper are subsumed
within and improved by the two papers
1. A plethora of inertial products and
2. Chern Classes and Compatible Power Operations in Inertial K-theory
|
[{'version': 'v1', 'created': 'Fri, 3 Feb 2012 04:09:02 GMT'}
{'version': 'v2', 'created': 'Mon, 10 Sep 2012 17:44:05 GMT'}]
|
2012-09-11
|
[array(['Edidin', 'Dan', ''], dtype=object)
array(['Jarvis', 'Tyler J.', ''], dtype=object)
array(['Kimura', 'Takashi', ''], dtype=object)]
|
2,426 |
1905.09009
|
Daniela Polino
|
Daniela Polino and Michele Parrinello
|
Kinetics of aqueous media reactions via ab initio enhanced molecular
dynamics: the case of urea decomposition
| null |
J. Phys. Chem. B 123 (2019) 6851-6856
|
10.1021/acs.jpcb.9b05271
| null |
physics.chem-ph physics.comp-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Aqueous solutions provide a medium for many important reactions in chemical
synthesis, industrial processes, environmental chemistry, and biological
functions. It is an accepted fact that aqueous solvents can be direct
participants to the reaction process and not act only as simple passive
dielectrics. Assisting water molecules and proton wires are thus essential for
the efficiency of many reactions. Here we study the decomposition of urea into
ammonia and isocyanic acid by means of enhanced ab initio molecular dynamics
simulations. We highlight the role of the solvent molecules and their
interactions with the reactants providing a proper description of the reaction
mechanism and how the water hydrogen-bond network affects the reaction
dynamics. Reaction free energy and rates have been calculated taking into
account this important effect.
|
[{'version': 'v1', 'created': 'Wed, 22 May 2019 08:14:01 GMT'}]
|
2019-08-27
|
[array(['Polino', 'Daniela', ''], dtype=object)
array(['Parrinello', 'Michele', ''], dtype=object)]
|
2,427 |
1903.06142
|
Silvio Peroni
|
Silvio Peroni, Paolo Ciancarini, Aldo Gangemi, Andrea Giovanni
Nuzzolese, Francesco Poggi, Valentina Presutti
|
The practice of self-citations: a longitudinal study
| null | null |
10.1007/s11192-020-03397-6
| null |
cs.DL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article, we discuss the outcomes of an experiment where we analysed
whether and to what extent the introduction, in 2012, of the new research
assessment exercise in Italy (a.k.a. Italian Scientific Habilitation) affected
self-citation behaviours in the Italian research community. The Italian
Scientific Habilitation attests to the scientific maturity of researchers and
in Italy, as in many other countries, is a requirement for accessing to a
professorship. To this end, we obtained from ScienceDirect 35,673 articles
published from 1957 and 2016 by the participants to the 2012 Italian Scientific
Habilitation, that resulted in the extraction of 1,379,050 citations retrieved
through Semantic Publishing technologies. Our analysis showed an overall
increment in author self-citations (i.e. where the citing article and the cited
article share at least one author) in several of the 24 academic disciplines
considered. However, we depicted a stronger causal relation between such
increment and the rules introduced by the 2012 Italian Scientific Habilitation
in 10 out of 24 disciplines analysed.
|
[{'version': 'v1', 'created': 'Thu, 14 Mar 2019 17:40:51 GMT'}
{'version': 'v2', 'created': 'Sat, 10 Aug 2019 14:20:47 GMT'}
{'version': 'v3', 'created': 'Wed, 19 Feb 2020 12:16:14 GMT'}]
|
2020-02-20
|
[array(['Peroni', 'Silvio', ''], dtype=object)
array(['Ciancarini', 'Paolo', ''], dtype=object)
array(['Gangemi', 'Aldo', ''], dtype=object)
array(['Nuzzolese', 'Andrea Giovanni', ''], dtype=object)
array(['Poggi', 'Francesco', ''], dtype=object)
array(['Presutti', 'Valentina', ''], dtype=object)]
|
2,428 |
1407.3819
|
Kelly Bickel
|
Kelly Bickel and Brett D. Wick
|
Well-Localized Operators on Matrix Weighted $L^2$ Spaces
|
v2: 26 pages, additional references added, small changes to Remarks
1.4 and 3.4, v3: referee comments addressed, additional changes to Remark 1.4
|
Houston J. Math. 42 (2016), no. 1, 249-283
| null | null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Nazarov-Treil-Volberg recently proved an elegant two-weight T1 theorem for
"almost diagonal" operators that played a key role in the proof of the $A_2$
conjecture for dyadic shifts and related operators. In this paper, we obtain a
generalization of their T1 theorem to the setting of matrix weights. Our
theorem does differ slightly from the scalar results, a fact attributable
almost completely to differences between the scalar and matrix Carleson
Embedding Theorems. The main tools include a reduction to the study of
well-localized operators, a new system of Haar functions adapted to matrix
weights, and a matrix Carleson Embedding Theorem.
|
[{'version': 'v1', 'created': 'Mon, 14 Jul 2014 21:11:33 GMT'}
{'version': 'v2', 'created': 'Thu, 24 Jul 2014 22:35:45 GMT'}
{'version': 'v3', 'created': 'Wed, 29 Jul 2015 01:32:24 GMT'}]
|
2016-10-10
|
[array(['Bickel', 'Kelly', ''], dtype=object)
array(['Wick', 'Brett D.', ''], dtype=object)]
|
2,429 |
1902.05787
|
Eduardo Cuervo Reyes
|
Eduardo Cuervo-Reyes and Reto Flueckiger
|
One law to rule them all: Stretched exponential master curve of capacity
fade for Li-ion batteries
| null | null | null | null |
physics.app-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Li-ion batteries gradually lose their capacity with time and use; therefore,
ageing forecasts are key to designs of battery powered systems. So far,
cell-type-specific studies without standardised testing practices have lead to
a variety of ageing models in which generality, simplicity, and accuracy seem
exclusive. Previous studies hint to an interplay of multiple mechanisms leading
to capacity loss, which depend on cell chemistry and are affected by
temperature, state of charge, and cycling rate. Here we show that, despite this
complexity, the time dependence of the actual capacity follows a unique master
curve, for several cell types aged under various different conditions. We
discuss the statistical origin of this common behaviour, and the testing
practice required for the characterisation of a model. The master curve is a
stretched exponential that describes many other phenomena in nature and is
theoretically justified within a diffusion-to-traps depletion model. These
findings provide a simple and broadly applicable framework for accurate
life-time predictions.
|
[{'version': 'v1', 'created': 'Fri, 15 Feb 2019 12:30:21 GMT'}
{'version': 'v2', 'created': 'Fri, 1 Mar 2019 15:52:49 GMT'}]
|
2019-03-04
|
[array(['Cuervo-Reyes', 'Eduardo', ''], dtype=object)
array(['Flueckiger', 'Reto', ''], dtype=object)]
|
2,430 |
cond-mat/0012390
|
Jan W. Kantelhardt
|
Jan W. Kantelhardt, Yosef Ashkenazy, Plamen Ch. Ivanov, Armin Bunde,
Shlomo Havlin, Thomas Penzel, Jorg-Hermann Peter, and H. Eugene Stanley
|
Characterization of Sleep Stages by Correlations of Heartbeat Increments
|
7 pages, 4 figures, revtex
|
Phys. Rev. E 65, 051908 (2002)
|
10.1103/PhysRevE.65.051908
| null |
cond-mat.stat-mech physics.bio-ph physics.data-an q-bio
| null |
We study correlation properties of the magnitude and the sign of the
increments in the time intervals between successive heartbeats during light
sleep, deep sleep, and REM sleep using the detrended fluctuation analysis
method. We find short-range anticorrelations in the sign time series, which are
strong during deep sleep, weaker during light sleep and even weaker during REM
sleep. In contrast, we find long-range positive correlations in the magnitude
time series, which are strong during REM sleep and weaker during light sleep.
We observe uncorrelated behavior for the magnitude during deep sleep. Since the
magnitude series relates to the nonlinear properties of the original time
series, while the signs series relates to the linear properties, our findings
suggest that the nonlinear properties of the heartbeat dynamics are more
pronounced during REM sleep. Thus, the sign and the magnitude series provide
information which is useful in distinguishing between the sleep stages.
|
[{'version': 'v1', 'created': 'Wed, 20 Dec 2000 20:25:19 GMT'}
{'version': 'v2', 'created': 'Fri, 1 Mar 2002 19:54:26 GMT'}]
|
2009-10-31
|
[array(['Kantelhardt', 'Jan W.', ''], dtype=object)
array(['Ashkenazy', 'Yosef', ''], dtype=object)
array(['Ivanov', 'Plamen Ch.', ''], dtype=object)
array(['Bunde', 'Armin', ''], dtype=object)
array(['Havlin', 'Shlomo', ''], dtype=object)
array(['Penzel', 'Thomas', ''], dtype=object)
array(['Peter', 'Jorg-Hermann', ''], dtype=object)
array(['Stanley', 'H. Eugene', ''], dtype=object)]
|
2,431 |
1909.01559
|
Baigong Zheng
|
Baigong Zheng, Renjie Zheng, Mingbo Ma, Liang Huang
|
Simpler and Faster Learning of Adaptive Policies for Simultaneous
Translation
|
EMNLP 2019
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Simultaneous translation is widely useful but remains challenging. Previous
work falls into two main categories: (a) fixed-latency policies such as Ma et
al. (2019) and (b) adaptive policies such as Gu et al. (2017). The former are
simple and effective, but have to aggressively predict future content due to
diverging source-target word order; the latter do not anticipate, but suffer
from unstable and inefficient training. To combine the merits of both
approaches, we propose a simple supervised-learning framework to learn an
adaptive policy from oracle READ/WRITE sequences generated from parallel text.
At each step, such an oracle sequence chooses to WRITE the next target word if
the available source sentence context provides enough information to do so,
otherwise READ the next source word. Experiments on German<->English show that
our method, without retraining the underlying NMT model, can learn flexible
policies with better BLEU scores and similar latencies compared to previous
work.
|
[{'version': 'v1', 'created': 'Wed, 4 Sep 2019 05:37:36 GMT'}
{'version': 'v2', 'created': 'Thu, 12 Sep 2019 01:19:12 GMT'}]
|
2019-09-13
|
[array(['Zheng', 'Baigong', ''], dtype=object)
array(['Zheng', 'Renjie', ''], dtype=object)
array(['Ma', 'Mingbo', ''], dtype=object)
array(['Huang', 'Liang', ''], dtype=object)]
|
2,432 |
2305.07012
|
Kedar Damle
|
Souvik Kundu and Kedar Damle
|
Flux fractionalization transition in two-dimensional dimer-loop models
| null | null | null | null |
cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The fully-packed O(1) loop model on square and honeycomb lattices is
critical, as is the fully-packed dimer model on these lattices. We introduce a
model of fully-packed dimers and loops with a relative fugacity $w$ that
interpolates between the fully-packed O(1) loop model ($w=0$) and the
fully-packed dimer model ($w=\infty$). We demonstrate that these two limits are
separated by a transition at a nonzero critical fugacity $w_c$. The $w<w_c$
phase has long loops and a power-law distribution of loop sizes, while a
short-loop phase is established for $w>w_c$. Away from $w_c$, both phases are
described by a long-wavelength Gaussian effective action for a scalar height
field that represents the coarse-grained electrostatic potential of fluctuating
dipoles. For periodic boundary conditions, the net electric flux that crosses a
cut along any periodic direction takes on all half-integer values for $w<w_c$,
while only integer values arise in the thermodynamic limit for $w>w_c$.
Power-law columnar order, present in the $w>w_c$ short-loop phase, is destroyed
by the proliferation of fractional fluxes in the long-loop phase. We argue that
this dimer-loop model describes the low temperature properties of spin $S=1$
antiferromagnets with exchange and easy-axis anisotropy on the planar
pyrochlore and kagome lattices in certain regimes of magnetic field and
anisotropy. We also construct a Rokhsar-Kivelson type Hamiltonian whose ground
state properties are controlled by this dimer-loop model.
|
[{'version': 'v1', 'created': 'Thu, 11 May 2023 17:53:33 GMT'}]
|
2023-05-12
|
[array(['Kundu', 'Souvik', ''], dtype=object)
array(['Damle', 'Kedar', ''], dtype=object)]
|
2,433 |
2212.07191
|
Pratikshya Jena
|
Pratikshya Jena and Shradha Mishra
|
Kinetics and steady state of polar flock with birth and death
|
8 pages, 7 figures
| null | null | null |
cond-mat.soft
|
http://creativecommons.org/licenses/by/4.0/
|
We study a collection of polar self-propelled particles or polar flock on a
two dimensional substrate with birth and death. Most of the previous studies of
polar flock with birth and death have assumed the compressible flock, such that
the local density of flock is completely ignored. Effect of birth and death of
particles on the flock with moderate density is focus of our study. System is
modeled using coarse-grained hydrodynamic equations of motion for local density
and velocity of the flock and solved using numerical integration of the
nonlinear coupled partial differential equations of motion and linearised
hydrodynamics about the broken symmetry state. We studied the ordering kinetics
as well as the steady state properties of the immortal flock and flock with
finite birth and death rate. The ordering kinetics of the velocity field
remains unaffected whereas the density field shows a crossover from asymptotic
growth exponent $5/6$ for the immortal flock to diffusive limit $1/3$ for large
birth and death rates. In the steady state, the presence of birth and death
rate leads to the suppression of speed of sound wave and density fluctuations
in the system.
|
[{'version': 'v1', 'created': 'Wed, 14 Dec 2022 12:36:18 GMT'}
{'version': 'v2', 'created': 'Thu, 15 Dec 2022 11:48:48 GMT'}]
|
2022-12-16
|
[array(['Jena', 'Pratikshya', ''], dtype=object)
array(['Mishra', 'Shradha', ''], dtype=object)]
|
2,434 |
2205.05177
|
Chirag Raman
|
Chirag Raman, Jose Vargas-Quiros, Stephanie Tan, Ashraful Islam, Ekin
Gedik, Hayley Hung
|
ConfLab: A Data Collection Concept, Dataset, and Benchmark for Machine
Analysis of Free-Standing Social Interactions in the Wild
|
In Proceedings of the Neural Information Processing Systems Track on
Datasets and Benchmarks (NeurIPS D&B)
| null | null | null |
cs.MM cs.LG
|
http://creativecommons.org/licenses/by-sa/4.0/
|
Recording the dynamics of unscripted human interactions in the wild is
challenging due to the delicate trade-offs between several factors: participant
privacy, ecological validity, data fidelity, and logistical overheads. To
address these, following a 'datasets for the community by the community' ethos,
we propose the Conference Living Lab (ConfLab): a new concept for multimodal
multisensor data collection of in-the-wild free-standing social conversations.
For the first instantiation of ConfLab described here, we organized a real-life
professional networking event at a major international conference. Involving 48
conference attendees, the dataset captures a diverse mix of status,
acquaintance, and networking motivations. Our capture setup improves upon the
data fidelity of prior in-the-wild datasets while retaining privacy
sensitivity: 8 videos (1920x1080, 60 fps) from a non-invasive overhead view,
and custom wearable sensors with onboard recording of body motion (full 9-axis
IMU), privacy-preserving low-frequency audio (1250 Hz), and Bluetooth-based
proximity. Additionally, we developed custom solutions for distributed hardware
synchronization at acquisition and time-efficient continuous annotation of body
keypoints and actions at high sampling rates. Our benchmarks showcase some of
the open research tasks related to in-the-wild privacy-preserving social data
analysis: keypoints detection from overhead camera views, skeleton-based
no-audio speaker detection, and F-formation detection.
|
[{'version': 'v1', 'created': 'Tue, 10 May 2022 21:30:10 GMT'}
{'version': 'v2', 'created': 'Sat, 23 Jul 2022 10:35:21 GMT'}
{'version': 'v3', 'created': 'Fri, 7 Oct 2022 18:30:10 GMT'}]
|
2022-10-11
|
[array(['Raman', 'Chirag', ''], dtype=object)
array(['Vargas-Quiros', 'Jose', ''], dtype=object)
array(['Tan', 'Stephanie', ''], dtype=object)
array(['Islam', 'Ashraful', ''], dtype=object)
array(['Gedik', 'Ekin', ''], dtype=object)
array(['Hung', 'Hayley', ''], dtype=object)]
|
2,435 |
1611.10139
|
Falk Wunderlich
|
Falk Wunderlich, Burkhard Kampfer
|
Photon emissivity in the vicinity of a critical point - A case study
within the quark meson model
|
22 pages, 11 figures
| null |
10.1016/j.nuclphysa.2016.11.009
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The quark meson (linear sigma) model with linearized fluctuations displays at
a critical end point the onset of a curve of first-order phase transitions
(FOPTs) located at non-zero chemical potentials and temperatures below a
certain cross-over temperature. The model qualifies well for an illustrative
example to study the impact of the emerging FOPT, e.g. on photon emissivities.
Such a case study unravels the tight interlocking of the phase structure with
the emission rates, here calculated according to lowest-order tree level
processes by kinetic theory expressions. It is the strong dependence of the
rates on the effective masses of the involved degrees of freedom which
distinctively vary over the phase diagram thus shaping the emissivity
accordingly. At the same time, thermodynamic properties of the medium are
linked decisively to these effective masses, i.e. a consistent evaluation of
thermodynamics, governing for instance adiabatic expansion paths, and emission
rates is maintained within such an approach.
|
[{'version': 'v1', 'created': 'Wed, 30 Nov 2016 13:30:59 GMT'}]
|
2017-02-01
|
[array(['Wunderlich', 'Falk', ''], dtype=object)
array(['Kampfer', 'Burkhard', ''], dtype=object)]
|
2,436 |
1802.04772
|
Ralf Srama
|
Ralf Srama, Sascha Kempf, Georg Moragas-Klostermeyer, Nicolas
Altobelli, Siegfried Auer, Uwe Beckmann, Sebastian Bugiel, Marcia Burton, Tom
Economou, Hugo Fechtig, Katherina Fiege, Simon F. Green, Manuel Grande, Ove
Havnes, Jon K. Hillier, Stefan Helfert, Mihaly Horanyi, Sean Hsu, Eduard
Igenbergs, E. K. Jessberger, Torrence V. Johnson, Emil Khalisi, Harald
Kr\"uger, G\"unter Matt, Anna Mocker, Philip Lamy, Gudrun Linkert, Franz
Lura, Dietrich M\"ohlmann, Gregor E. Morfill, Katharina Otto, Frank Postberg,
Mou Roy, J\"urgen Schmidt, Gerhard H. Schwehm, Frank Spahn, Veerle Sterken,
Jiri Svestka, Valentin Tschernjawski, Eberhard Gr\"un, Hans-Peter R\"oser
|
The Cosmic Dust Analyzer onboard Cassini: ten years of discoveries
|
18 pages, 12 Figures, DLRK 2011
|
Srama, R., Kempf, S., Moragas-Klostermeyer, G. et al. CEAS Space J
(2011) 2: 3.
|
10.1007/s12567-011-0014-x
| null |
astro-ph.EP physics.space-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The interplanetary space probe Cassini/Huygens reached Saturn in July 2004
after seven years of cruise phase. The Cosmic Dust Analyzer (CDA) measures the
interplanetary, interstellar and planetary dust in our solar system since 1999
and provided unique discoveries. In 1999, CDA detected interstellar dust in the
inner solar system followed by the detection of electrical charges of
interplanetary dust grains during the cruise phase between Earth and Jupiter.
The instrument determined the composition of interplanetary dust and the
nanometre sized dust streams originating from Jupiter's moon Io. During the
approach to Saturn in 2004, similar streams of submicron grains with speeds in
the order of 100 km/s were detected from Saturn's inner and outer ring system
and are released to the interplanetary magnetic field. Since 2004 CDA measured
more than one million dust impacts characterizing the dust environment of
Saturn. The instrument is one of three experiments which discovered the active
ice geysers located at the south pole of Saturn's moon Enceladus in 2005.
Later, a detailed compositional analysis of the water ice grains in Saturn's E
ring system lead to the discovery of large reservoirs of liquid water (oceans)
below the icy crust of Enceladus. Finally, the determination of the dust-
magnetosphere interaction and the discovery of the extended E ring (at least
twice as large as predicted) allowed the definition of a dynamical dust model
of Saturn's E ring describing the observed properties. This paper summarizes
the discoveries of a ten year story of success based on reliable measurements
with the most advanced dust detector flown in space until today. This paper
focuses on cruise results and findings achieved at Saturn with a focus on flux
and density measurements.
|
[{'version': 'v1', 'created': 'Tue, 13 Feb 2018 18:04:01 GMT'}]
|
2018-02-14
|
[array(['Srama', 'Ralf', ''], dtype=object)
array(['Kempf', 'Sascha', ''], dtype=object)
array(['Moragas-Klostermeyer', 'Georg', ''], dtype=object)
array(['Altobelli', 'Nicolas', ''], dtype=object)
array(['Auer', 'Siegfried', ''], dtype=object)
array(['Beckmann', 'Uwe', ''], dtype=object)
array(['Bugiel', 'Sebastian', ''], dtype=object)
array(['Burton', 'Marcia', ''], dtype=object)
array(['Economou', 'Tom', ''], dtype=object)
array(['Fechtig', 'Hugo', ''], dtype=object)
array(['Fiege', 'Katherina', ''], dtype=object)
array(['Green', 'Simon F.', ''], dtype=object)
array(['Grande', 'Manuel', ''], dtype=object)
array(['Havnes', 'Ove', ''], dtype=object)
array(['Hillier', 'Jon K.', ''], dtype=object)
array(['Helfert', 'Stefan', ''], dtype=object)
array(['Horanyi', 'Mihaly', ''], dtype=object)
array(['Hsu', 'Sean', ''], dtype=object)
array(['Igenbergs', 'Eduard', ''], dtype=object)
array(['Jessberger', 'E. K.', ''], dtype=object)
array(['Johnson', 'Torrence V.', ''], dtype=object)
array(['Khalisi', 'Emil', ''], dtype=object)
array(['Krüger', 'Harald', ''], dtype=object)
array(['Matt', 'Günter', ''], dtype=object)
array(['Mocker', 'Anna', ''], dtype=object)
array(['Lamy', 'Philip', ''], dtype=object)
array(['Linkert', 'Gudrun', ''], dtype=object)
array(['Lura', 'Franz', ''], dtype=object)
array(['Möhlmann', 'Dietrich', ''], dtype=object)
array(['Morfill', 'Gregor E.', ''], dtype=object)
array(['Otto', 'Katharina', ''], dtype=object)
array(['Postberg', 'Frank', ''], dtype=object)
array(['Roy', 'Mou', ''], dtype=object)
array(['Schmidt', 'Jürgen', ''], dtype=object)
array(['Schwehm', 'Gerhard H.', ''], dtype=object)
array(['Spahn', 'Frank', ''], dtype=object)
array(['Sterken', 'Veerle', ''], dtype=object)
array(['Svestka', 'Jiri', ''], dtype=object)
array(['Tschernjawski', 'Valentin', ''], dtype=object)
array(['Grün', 'Eberhard', ''], dtype=object)
array(['Röser', 'Hans-Peter', ''], dtype=object)]
|
2,437 |
1110.5155
|
David Lannes
|
Walter Craig, David Lannes, Catherine Sulem
|
Water waves over a rough bottom in the shallow water regime
|
Revised version, to appear in Annales de l'Institut Henri Poincar\'e
| null |
10.1016/j.anihpc.2011.10.004
| null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This is a study of the Euler equations for free surface water waves in the
case of varying bathymetry, considering the problem in the shallow water
scaling regime. In the case of rapidly varying periodic bottom boundaries this
is a problem of homogenization theory. In this setting we derive a new model
system of equations, consisting of the classical shallow water equations
coupled with nonlocal evolution equations for a periodic corrector term. We
also exhibit a new resonance phenomenon between surface waves and a periodic
bottom. This resonance, which gives rise to secular growth of surface wave
patterns, can be viewed as a nonlinear generalization of the classical Bragg
resonance. We justify the derivation of our model with a rigorous mathematical
analysis of the scaling limit and the resulting error terms. The principal
issue is that the shallow water limit and the homogenization process must be
performed simultaneously. Our model equations and the error analysis are valid
for both the two- and the three-dimensional physical problems.
|
[{'version': 'v1', 'created': 'Mon, 24 Oct 2011 08:05:57 GMT'}]
|
2016-01-20
|
[array(['Craig', 'Walter', ''], dtype=object)
array(['Lannes', 'David', ''], dtype=object)
array(['Sulem', 'Catherine', ''], dtype=object)]
|
2,438 |
cond-mat/0203416
|
M. Leone
|
M. Leone (1 and 2), A. Vazquez (1 and 2), A. Vespignani (2) and R.
Zecchina (2) ((1) International School for Advanced Studies, Trieste, (2)
International Centre for Theoretical Physics, Trieste)
|
Ferromagnetic ordering in graphs with arbitrary degree distribution
|
9 pages, 1 figure
| null |
10.1140/epjb/e2002-00220-0
| null |
cond-mat.stat-mech cond-mat.dis-nn
| null |
We present a detailed study of the phase diagram of the Ising model in random
graphs with arbitrary degree distribution. By using the replica method we
compute exactly the value of the critical temperature and the associated
critical exponents as a function of the minimum and maximum degree, and the
degree distribution characterizing the graph. As expected, there is a
ferromagnetic transition provided <k> <= <k^2> < \infty. However, if the fourth
moment of the degree distribution is not finite then non-trivial scaling
exponents are obtained. These results are analyzed for the particular case of
power-law distributed random graphs.
|
[{'version': 'v1', 'created': 'Wed, 20 Mar 2002 19:08:10 GMT'}]
|
2009-11-07
|
[array(['Leone', 'M.', '', '1 and 2'], dtype=object)
array(['Vazquez', 'A.', '', '1 and 2'], dtype=object)
array(['Vespignani', 'A.', ''], dtype=object)
array(['Zecchina', 'R.', ''], dtype=object)]
|
2,439 |
2012.08607
|
Ritu Devi
|
Ritu Devi, Jaydip Singh and Baba Potukuchi
|
Uncertainties in QE and RES events at LBNF due to hadronic production in
FSI
| null |
Braz J Phys 52, 146 (2022)
|
10.1007/s13538-022-01144-1
| null |
hep-ph
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
To achieve appropriate interaction rates in recent neutrino oscillation
studies, high atomic number nuclear targets were utilized. Because of the
nuclear effects in the experimental observable, the utilization of these
complicated targets produced systematic uncertainties that needed to be
assessed accurately to constrain the discovery. We made an effort to calculate
the nuclear effects in the Ar and H targets, which are intended to be employed
at the DUNE distant and near detectors, respectively, through our simulation
effort. The DUNE flux is peaking around 2.5 GeV and CCRES is the dominant
process at this energy. So, this work will be focused only on the CCQE and
CCRES interactions and the simulations will be done using two different
neutrino event generators. We reported the ratio of the oscillation probability
(P(Ar)/P(H) as a function of reconstructed neutrino energy for CCRES channels
to quantify the systematic errors in the observables.
|
[{'version': 'v1', 'created': 'Tue, 24 Nov 2020 17:36:53 GMT'}
{'version': 'v2', 'created': 'Fri, 4 Mar 2022 04:59:58 GMT'}]
|
2022-06-22
|
[array(['Devi', 'Ritu', ''], dtype=object)
array(['Singh', 'Jaydip', ''], dtype=object)
array(['Potukuchi', 'Baba', ''], dtype=object)]
|
2,440 |
1004.5463
|
Heikki Salo Dr.
|
H.Salo, E.Laurikainen, R. Buta, J.H. Knapen
|
Bars do drive spiral density waves
|
Accepted to ApJL
| null |
10.1088/2041-8205/715/1/L56
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, Buta etal. (2009) examined the question "Do Bars Drive Spiral
Density Waves?", an idea supported by theoretical studies and also from a
preliminary observational analysis Block etal (2004). They estimated maximum
bar strengths Q_b, maximum spiral strengths Q_s, and maximum m=2 arm contrasts
A_2s for 23 galaxies with deep AAT K_s-band images. These were combined with
previously published Q_b and Q_s values for 147 galaxies from the OSUBSGS
sample and with the 12 galaxies from Block etal(2004). Weak correlation between
Q_b and Q_s was confirmed for the combined sample, whereas the AAT subset alone
showed no significant correlations between Q_b and Q_s, nor between Q_b and
A_2s. A similar negative result was obtained in Durbala etal. (2009) for 46
galaxies. Based on these studies, the answer to the above question remains
uncertain. Here we use a novel approach, and show that although the correlation
between the maximum bar and spiral parameters is weak, these parameters do
correlate when compared locally. For the OSUBSGS sample a statistically
significant correlation is found between the local spiral amplitude, and the
forcing due to the bar's potential at the same distance, out to 1.6 bar radii
(the typical bar perturbation is then of the order of a few percent). Also for
the sample of 23 AAT galaxies we find a significant correlation between local
parameters out to 1.4 bar radii. Our new results confirm that, at least in a
statistical sense, bars do indeed drive spiral density waves.
|
[{'version': 'v1', 'created': 'Fri, 30 Apr 2010 07:58:00 GMT'}]
|
2015-05-18
|
[array(['Salo', 'H.', ''], dtype=object)
array(['Laurikainen', 'E.', ''], dtype=object)
array(['Buta', 'R.', ''], dtype=object)
array(['Knapen', 'J. H.', ''], dtype=object)]
|
2,441 |
2210.07129
|
E. Ruben van Beesten
|
E. Ruben van Beesten, Daan Hulshof
|
Economic incentives for capacity reductions on interconnectors in the
day-ahead market
|
20 pages, 16 figures
| null | null | null |
econ.GN q-fin.EC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a zonal international power market and investigate potential
economic incentives for short-term reductions of transmission capacities on
existing interconnectors by the responsible transmission system operators
(TSOs). We show that if a TSO aims to maximize domestic total welfare, it often
has an incentive to reduce the capacity on the interconnectors to neighboring
countries.
In contrast with the (limited) literature on this subject, which focuses on
incentives through the avoidance of future balancing costs, we show that
incentives can exist even if one ignores balancing and focuses solely on
welfare gains in the day-ahead market itself. Our analysis consists of two
parts. In the first part, we develop an analytical framework that explains why
these incentives exist. In particular, we distinguish two mechanisms: one based
on price differences with neighboring countries and one based on the domestic
electricity price. In the second part, we perform numerical experiments using a
model of the Northern-European power system, focusing on the Danish TSO. In 97%
of the historical hours tested, we indeed observe economic incentives for
capacity reductions, leading to significant welfare gains for Denmark and
welfare losses for the system as a whole. We show that the potential for
welfare gains greatly depends on the ability of the TSO to adapt interconnector
capacities to short-term market conditions. Finally, we explore the extent to
which the recently introduced European "70%-rule" can mitigate the incentives
for capacity reductions and their welfare effects.
|
[{'version': 'v1', 'created': 'Thu, 13 Oct 2022 16:11:51 GMT'}]
|
2022-10-14
|
[array(['van Beesten', 'E. Ruben', ''], dtype=object)
array(['Hulshof', 'Daan', ''], dtype=object)]
|
2,442 |
2208.02581
|
R\'emi Lassalle Phd
|
R\'emi Lassalle
|
A mass transport approach to the optimization of adapted couplings of
real valued random variables
|
Document of work in progess
| null | null | null |
math.PR math.OC
|
http://creativecommons.org/licenses/by/4.0/
|
In this work, we investigate an optimization problem over adapted couplings
between pairs of real valued random variables, possibly describing random
times. We relate those couplings to a specific class of causal transport plans
between probabilities on the set of real numbers endowed with a filtration, for
which their provide a specific representation, which is motivated by a precise
characterization of the corresponding deterministic transport plans. From this,
under mild hypothesis, the existence of a solution to the problem investigated
here is obtained. Furthermore, several examples are provided, within this
explicit framework.
|
[{'version': 'v1', 'created': 'Thu, 4 Aug 2022 11:10:50 GMT'}
{'version': 'v2', 'created': 'Sat, 15 Oct 2022 16:31:26 GMT'}]
|
2022-10-18
|
[array(['Lassalle', 'Rémi', ''], dtype=object)]
|
2,443 |
1201.6532
|
Zaikun Zhang
|
Zaikun Zhang
|
Notes on the Sobolev (Semi)Norms of Quadratic Functions
|
11 pages; related to
http://www.optimization-online.org/DB_HTML/2011/11/3245.html
| null | null | null |
math.OC math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper studies the $H^0$ norm and $H^1$ seminorm of quadratic functions.
The (semi)norms are expressed explicitly in terms of the coefficients of the
quadratic function under consideration when the underlying domain is an
$l_p$-ball (1 \leq p \leq \infty) in $R^n$ .
|
[{'version': 'v1', 'created': 'Tue, 31 Jan 2012 13:03:16 GMT'}]
|
2012-02-01
|
[array(['Zhang', 'Zaikun', ''], dtype=object)]
|
2,444 |
1812.07101
|
Sourya Sengupta
|
Sourya Sengupta, Amitojdeep Singh, Henry A.Leopold, Tanmay Gulati,
Vasudevan Lakshminarayanan
|
Application of Deep Learning in Fundus Image Processing for Ophthalmic
Diagnosis -- A Review
| null |
Artificial Intelligence in Medicine Volume 102, January 2020,
101758
|
10.1016/j.artmed.2019.101758
| null |
cs.CV cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An overview of the applications of deep learning in ophthalmic diagnosis
using retinal fundus images is presented. We also review various retinal image
datasets that can be used for deep learning purposes. Applications of deep
learning for segmentation of optic disk, blood vessels and retinal layer as
well as detection of lesions are reviewed. Recent deep learning models for
classification of diseases such as age-related macular degeneration,
glaucoma,diabetic macular edema and diabetic retinopathy are also reported.
|
[{'version': 'v1', 'created': 'Sun, 9 Dec 2018 05:57:17 GMT'}
{'version': 'v2', 'created': 'Wed, 13 Feb 2019 01:59:58 GMT'}
{'version': 'v3', 'created': 'Fri, 5 Jul 2019 19:57:45 GMT'}]
|
2020-01-24
|
[array(['Sengupta', 'Sourya', ''], dtype=object)
array(['Singh', 'Amitojdeep', ''], dtype=object)
array(['Leopold', 'Henry A.', ''], dtype=object)
array(['Gulati', 'Tanmay', ''], dtype=object)
array(['Lakshminarayanan', 'Vasudevan', ''], dtype=object)]
|
2,445 |
quant-ph/0403078
|
Aram Harrow
|
Charles H. Bennett, Aram W. Harrow, Seth Lloyd
|
Universal quantum data compression via gentle tomography
|
4 pages, revtex4
|
Phys. Rev. A 73, 032336 (2006)
|
10.1103/PhysRevA.73.032336
| null |
quant-ph
| null |
Quantum state tomography--the practice of estimating a quantum state by
performing measurements on it--is useful in a variety of contexts. We introduce
"gentle tomography" as a version of tomography that preserves the measured
quantum data. As an application of gentle tomography, we describe a simple
polynomial-time method for universal source coding.
|
[{'version': 'v1', 'created': 'Wed, 10 Mar 2004 02:18:03 GMT'}]
|
2007-05-23
|
[array(['Bennett', 'Charles H.', ''], dtype=object)
array(['Harrow', 'Aram W.', ''], dtype=object)
array(['Lloyd', 'Seth', ''], dtype=object)]
|
2,446 |
2102.11744
|
R\'obert Kov\'acs
|
Anna Feh\'er, Norbert Luk\'acs, L\'aszl\'o Somlai, Tam\'as Fodor,
M\'aty\'as Sz\"ucs, Tam\'as F\"ul\"op, P\'eter V\'an, R\'obert Kov\'acs
|
Size effects and beyond-Fourier heat conduction in room-temperature
experiments
| null |
Journal of Non-Equilibrium Thermodynamics, 46/4, 403--411, 2021
|
10.1515/jnet-2021-0033
| null |
physics.class-ph physics.app-ph
|
http://creativecommons.org/licenses/by/4.0/
|
It is a long-lasting task to understand heat conduction phenomena beyond
Fourier. Besides the low-temperature experiments on extremely pure crystals, it
has turned out recently that heterogeneous materials with macro-scale size can
also show thermal effects that cannot be modelled by the Fourier equation. This
is called over-diffusive propagation, different from low-temperature
observations, and is found in numerous samples made from metal foam, rocks, and
composites. The measured temperature history is indeed similar to what
Fourier's law predicts but the usual evaluation cannot provide reliable thermal
parameters. This paper is a report on our experiments on several rock types,
each type having multiple samples with different thicknesses. We show that
size-dependent thermal behaviour can occur for both Fourier and non-Fourier
situations. Moreover, based on the present experimental data, we find an
empirical relation between the Fourier and non-Fourier parameters, which may be
helpful in later experiments to develop a more robust and reliable evaluation
procedure.
|
[{'version': 'v1', 'created': 'Tue, 23 Feb 2021 15:17:08 GMT'}]
|
2022-04-26
|
[array(['Fehér', 'Anna', ''], dtype=object)
array(['Lukács', 'Norbert', ''], dtype=object)
array(['Somlai', 'László', ''], dtype=object)
array(['Fodor', 'Tamás', ''], dtype=object)
array(['Szücs', 'Mátyás', ''], dtype=object)
array(['Fülöp', 'Tamás', ''], dtype=object)
array(['Ván', 'Péter', ''], dtype=object)
array(['Kovács', 'Róbert', ''], dtype=object)]
|
2,447 |
0808.1214
|
Yuri Virchenko Petrovich
|
R. E. Brodskii, Yu P. Virchenko
|
Investigation of the kinetic equation of cascade fragmentation theory at
not self-similar subdivision
|
5 pages
| null | null | null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The cascade kinetic fragmentation process of solids is investigated when the
condition probability density of splinter formation do not depends on time and
has the property $P(\rho, r, t) = P(\rho/r)$. It is obtained the evolution
equation for the probability distribution density in terms of its Mellin
transformation. In the particular case $P(\rho/r) = C (\rho/r)^\alpha$, the
limit solution of this equation at $t \to \infty$ is found. It differs
essentially from the Kolmogorov law.
|
[{'version': 'v1', 'created': 'Fri, 8 Aug 2008 14:45:49 GMT'}
{'version': 'v2', 'created': 'Sun, 10 Aug 2008 16:42:54 GMT'}]
|
2008-08-11
|
[array(['Brodskii', 'R. E.', ''], dtype=object)
array(['Virchenko', 'Yu P.', ''], dtype=object)]
|
2,448 |
hep-ph/9901205
|
Ylsdd
|
Hong Xuan Liu, Chong Sheng Li and Zhen Jun Xiao
|
O(\alpha_s) QCD Corrections to Spin Correlations in $e^- e^+ \to t \bar
t$ process at the NLC
|
12 pages, 4 figures, revised version (a few print mistakes are
corrected, some numerical results are modified, and Fig.4 is added)
|
Phys.Lett.B458:393-401,1999
|
10.1016/S0370-2693(99)00593-6
|
PKU-TH-99-01
|
hep-ph
| null |
Using a Generic spin basis, we present a general formalism of one-loop
radiative corrections to the spin correlations in the top quark pair production
at the Next Linear Collider, and calculate the O(\alpha_s) QCD corrections
under the soft gluon approximation. We find that: (a) in Off-diagonal basis,
the $O(\alpha_s)$ QCD corrections to $e_L^- e^+$ ($e_R^- e^+$) scattering
process increase the differential cross sections of the dominant spin component
$t_{\uparrow}\bar{t}_{\downarrow}$ ($t_{\downarrow}\bar{t}_{\uparrow}$) by
$\sim 30%$ and $\sim (0.1%-3%)$ depending on the scattering angle for
$\sqrt{s}=400 GeV$ and 1 TeV, respectively; (b) in {Off-diagonal basis}
(Helicity basis), the dominant spin component makes up 99.8% ($\sim 53%$) of
the total cross section at both tree and one-loop level for $\sqrt{s}=400 GeV$,
and the Off-diagonal basis therefore remains to be the optimal spin basis after
the inclusion of $O(\alpha_s)$ QCD corrections.
|
[{'version': 'v1', 'created': 'Sun, 3 Jan 1999 06:36:36 GMT'}
{'version': 'v2', 'created': 'Thu, 18 Mar 1999 08:37:18 GMT'}]
|
2011-03-23
|
[array(['Liu', 'Hong Xuan', ''], dtype=object)
array(['Li', 'Chong Sheng', ''], dtype=object)
array(['Xiao', 'Zhen Jun', ''], dtype=object)]
|
2,449 |
0812.4571
|
Sasa Kresic-Juric
|
Stjepan Meljanac, Sasa Kresic-Juric
|
Noncommutative Differential Forms on the kappa-deformed Space
|
to appear in J. Phys. A: Math. Theor
|
J.Phys.A42:365204,2009
|
10.1088/1751-8113/42/36/365204
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We construct a differential algebra of forms on the kappa-deformed space. For
a given realization of the noncommutative coordinates as formal power series in
the Weyl algebra we find an infinite family of one-forms and nilpotent exterior
derivatives. We derive explicit expressions for the exterior derivative and
one-forms in covariant and noncovariant realizations. We also introduce
higher-order forms and show that the exterior derivative satisfies the graded
Leibniz rule. The differential forms are generally not graded-commutative, but
they satisfy the graded Jacobi identity. We also consider the star-product of
classical differential forms. The star-product is well-defined if the
commutator between the noncommutative coordinates and one-forms is closed in
the space of one-forms alone. In addition, we show that in certain realizations
the exterior derivative acting on the star-product satisfies the undeformed
Leibniz rule.
|
[{'version': 'v1', 'created': 'Wed, 24 Dec 2008 20:18:23 GMT'}
{'version': 'v2', 'created': 'Mon, 10 Aug 2009 12:17:42 GMT'}]
|
2014-11-18
|
[array(['Meljanac', 'Stjepan', ''], dtype=object)
array(['Kresic-Juric', 'Sasa', ''], dtype=object)]
|
2,450 |
2212.07777
|
Alberto Ravagnani
|
Heide Gluesing-Luerssen, Alberto Ravagnani
|
$\ell$-Complementary Subspaces and Codes in Finite Bilinear Spaces
| null | null | null | null |
cs.IT math.CO math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider (symmetric, non-degenerate) bilinear spaces over a finite field
and investigate the properties of their $\ell$-complementary subspaces, i.e.,
the subspaces that intersect their dual in dimension $\ell$. This concept
generalizes that of a totally isotropic subspace and, in the context of coding
theory, specializes to the notions of self-orthogonal, self-dual and
linear-complementary-dual (LCD) codes. In this paper, we focus on the
enumerative and asymptotic combinatorics of all these objects, giving formulas
for their numbers and describing their typical behavior (rather than the
behavior of a single object). For example, we give a closed formula for the
average weight distribution of an $\ell$-complementary code in the Hamming
metric, generalizing a result by Pless and Sloane on the aggregate weight
enumerator of binary self-dual codes. Our results also show that
self-orthogonal codes, despite being very sparse in the set of codes of the
same dimension over a large field, asymptotically behave quite similarly to a
typical, not necessarily self-orthogonal, code. In particular, we prove that
most self-orthogonal codes are MDS over a large field by computing the
asymptotic proportion of the non-MDS ones for growing field size.
|
[{'version': 'v1', 'created': 'Thu, 15 Dec 2022 12:54:14 GMT'}]
|
2022-12-16
|
[array(['Gluesing-Luerssen', 'Heide', ''], dtype=object)
array(['Ravagnani', 'Alberto', ''], dtype=object)]
|
2,451 |
cond-mat/0510132
|
Kouhei Takahashi
|
Kouhei Takahashi, Noriaki Kida, and Masayoshi Tonouchi
|
Terahertz radiation by ultrafast spontaneous polarization modulation in
multiferroic BiFeO$_3$ thin films
|
4 pages, 4 figures, submitted to Physical Review Letters
| null |
10.1103/PhysRevLett.96.117402
| null |
cond-mat.str-el cond-mat.mtrl-sci
| null |
Terahertz (THz) radiation has been observed from multiferroic BiFeO$_3$ thin
films via ultrafast modulation of spontaneous polarization upon carrier
excitation with illumination of femtosecond laser pulses. The radiated THz
pulses from BiFeO$_3$ thin films were clarified to directly reflect the
spontaneous polarization state, giving rise to a memory effect in a unique
style and enabling THz radiation even at zero-bias electric field. On the basis
of our findings, we demonstrate potential approaches to ferroelectric
nonvolatile random access memory with nondestructive readability and
ferroelectric domain imaging microscopy using THz radiation as a sensitive
probe.
|
[{'version': 'v1', 'created': 'Thu, 6 Oct 2005 07:40:48 GMT'}]
|
2016-08-31
|
[array(['Takahashi', 'Kouhei', ''], dtype=object)
array(['Kida', 'Noriaki', ''], dtype=object)
array(['Tonouchi', 'Masayoshi', ''], dtype=object)]
|
2,452 |
2307.00726
|
Roberto da Silva
|
Roberto da Silva, T\^ania Tom\'e, M\'ario Jos\'e de Oliveira
|
Numerical exploration of the Aging effects in spin systems
|
14 pages, 6 figures
| null | null | null |
cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An interesting concept that has been underexplored in the context of
time-dependent simulations is the correlation of total magnetization, $C(t)$%.
One of its main advantages over directly studying magnetization is that we do
not need to meticulously prepare initial magnetizations. This is because the
evolutions are computed from initial states with spins that are independent and
completely random. In this paper, we take an important step in demonstrating
that even for time evolutions from other initial conditions, $C(t_{0},t)$, a
suitable scaling can be performed to obtain universal power laws. We
specifically consider the significant role played by the second moment of
magnetization. Additionally, we complement the study by conducting a recent
investigation of random matrices, which are applied to determine the critical
properties of the system. Our results show that the aging in the time series of
magnetization influences the spectral properties of matrices and their ability
to determine the critical temperature of systems.
|
[{'version': 'v1', 'created': 'Mon, 3 Jul 2023 03:11:44 GMT'}]
|
2023-07-04
|
[array(['da Silva', 'Roberto', ''], dtype=object)
array(['Tomé', 'Tânia', ''], dtype=object)
array(['de Oliveira', 'Mário José', ''], dtype=object)]
|
2,453 |
astro-ph/0410381
|
Gijs Nelemans
|
G. Nelemans
|
What can we learn about black-hole formation from black-hole X-ray
binaries?
|
To appear in proceedings of "Massive Stars in Interacting Binaries",
eds. Nicole St-Louis & Tony Moffat
| null | null | null |
astro-ph
| null |
I discuss the effect of the formation of a black hole on a (close) binary and
show some of the current constraints that the observed properties of black hole
X-ray binaries put on the formation of black holes. In particular I discuss the
evidence for and against asymmetric kicks imparted on the black hole at
formation and find contradicting answers, as there seems to be evidence for
kick for individual systems and from the Galactic $z$-distribution of black
hole X-ray binaries, but not from their line-of-sight velocities.
|
[{'version': 'v1', 'created': 'Fri, 15 Oct 2004 14:55:48 GMT'}]
|
2007-05-23
|
[array(['Nelemans', 'G.', ''], dtype=object)]
|
2,454 |
0807.2037
|
Michael Bodendorfer Mr
|
Michael Bodendorfer, Kathrin Altwegg, Peter Wurz, Herbert Shea
|
Identification of the ECR zone in the SWISSCASE ECR ion source
|
9 pages, 8 figures
| null |
10.1016/j.nimb.2008.07.019
| null |
physics.plasm-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The magnetic field of the permanent magnet electron cyclotron resonance (ECR)
ion source SWISSCASE located at the University of Bern has been numerically
simulated and experimentally investigated. For the first time the magnetized
volume qualified for electron cyclotron resonance at 10.88 GHz and 388.6 mT has
been analyzed in highly detailed 3D simulations with unprecedented resolution.
The observed pattern of carbon coatings on the source correlates strongly with
the electron and ion distribution in the ECR plasma of SWISSCASE. Under certain
plasma conditions the ion distribution is tightly bound to the electron
distribution and can considerably simplify the numerical calculations in ECR
related applications such as ECR ion engines and ECR ion implanters.
|
[{'version': 'v1', 'created': 'Sun, 13 Jul 2008 15:43:04 GMT'}]
|
2009-11-13
|
[array(['Bodendorfer', 'Michael', ''], dtype=object)
array(['Altwegg', 'Kathrin', ''], dtype=object)
array(['Wurz', 'Peter', ''], dtype=object)
array(['Shea', 'Herbert', ''], dtype=object)]
|
2,455 |
2112.09509
|
Mustafa Abduljabbar
|
Mustafa Abduljabbar, Mahmoud Eljammaly, Miquel Pericas
|
Mitigating inefficient task mappings with an Adaptive Resource-Moldable
Scheduler (ARMS)
| null | null | null | null |
cs.DC cs.PF
|
http://creativecommons.org/licenses/by/4.0/
|
Efficient runtime task scheduling on complex memory hierarchy becomes
increasingly important as modern and future High-Performance Computing (HPC)
systems are progressively composed of multisocket and multi-chiplet nodes with
nonuniform memory access latencies. Existing locality-aware scheduling schemes
either require control of the data placement policy for memory-bound tasks or
maximize locality for all classes of computations, resulting in a loss of
potential performance. While such approaches are viable, an adaptive scheduling
strategy is preferred to enhance locality and resource sharing efficiency using
a portable programming scheme. In this paper, we propose the Adaptive
Resource-Moldable Scheduler (ARMS) that dynamically maps a task at runtime to a
partition spanning one or more threads, based on the task and DAG requirements.
The scheduler builds an online platform-independent model for the local and
non-local scheduling costs for each tuple consisting of task type (function)
and task topology (task location within DAG). We evaluate ARMS using
task-parallel versions of SparseLU, 2D Stencil, FMM, and MatMul as examples.
Compared to previous approaches, ARMS achieves up to 3.5x performance gain over
state-of-the-art locality-aware scheduling schemes.
|
[{'version': 'v1', 'created': 'Fri, 17 Dec 2021 13:49:34 GMT'}]
|
2021-12-20
|
[array(['Abduljabbar', 'Mustafa', ''], dtype=object)
array(['Eljammaly', 'Mahmoud', ''], dtype=object)
array(['Pericas', 'Miquel', ''], dtype=object)]
|
2,456 |
1805.06219
|
Li Chen
|
Li Chen (SNNU)
|
Pattern dynamics of interacting contagions
|
13 pages, 9 figures. Any comments are welcome
|
Phys. Rev. E 99, 022308 (2019)
|
10.1103/PhysRevE.99.022308
| null |
physics.soc-ph nlin.PS physics.bio-ph q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The spread of infectious diseases, rumors, fashions, innovations are complex
contagion processes, embedded both in networked and spatial contexts. Here we
investigate the pattern dynamics of a complex contagion, where two agents, say
$A$ and $B$, interact with each other and diffuse simultaneously in the
geographic space. The contagion process for each follows the classical
susceptible-infected-susceptible kinetics, and their interaction introduces a
potential change in the secondary infection propensity compared to the baseline
reproduction ratio $R_0$. We show that nontrivial spatial infection patterns
arise, when the susceptible move faster than the infected and the interaction
between the two agents is neither too competitive nor too cooperative.
Interestingly, the system exhibits pattern hysteresis phenomena that quite
different parameter regions allowing for patterns exist in the direction of
increasing $R_0$ and in the direction of eradication by its reduction. The
latter shows a remarkable enhancement in the contagion prevalence, meaning that
the infection eradication now becomes extremely difficult compared to the
single-agent scenario and to the coinfection without space. Linearization
analysis supports our observations, and we identified the required elements and
dynamical mechanism behind the emergence of a pattern. These findings call for
further investigation for their close relevance, both in biological and social
contagions.
|
[{'version': 'v1', 'created': 'Wed, 16 May 2018 10:02:01 GMT'}]
|
2019-02-18
|
[array(['Chen', 'Li', '', 'SNNU'], dtype=object)]
|
2,457 |
1408.3719
|
Olindo Zanotti
|
Walter Boscheri, Michael Dumbser, Olindo Zanotti
|
High Order Cell-Centered Lagrangian-Type Finite Volume Schemes with
Time-Accurate Local Time Stepping on Unstructured Triangular Meshes
|
31 pages, 13 figures
| null |
10.1016/j.jcp.2015.02.052
| null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a novel cell-centered direct Arbitrary-Lagrangian-Eulerian (ALE)
finite volume scheme on unstructured triangular meshes that is high order
accurate in space and time and that also allows for time-accurate local time
stepping (LTS). The new scheme uses the following basic ingredients: a high
order WENO reconstruction in space on unstructured meshes, an element-local
high-order accurate space-time Galerkin predictor that performs the time
evolution of the reconstructed polynomials within each element, the computation
of numerical ALE fluxes at the moving element interfaces through approximate
Riemann solvers, and a one-step finite volume scheme for the time update which
is directly based on the integral form of the conservation equations in
space-time. The inclusion of the LTS algorithm requires a number of crucial
extensions, such as a proper scheduling criterion for the time update of each
element and for each node; a virtual projection of the elements contained in
the reconstruction stencils of the element that has to perform the WENO
reconstruction; and the proper computation of the fluxes through the space-time
boundary surfaces that will inevitably contain hanging nodes in time due to the
LTS algorithm. We have validated our new unstructured Lagrangian LTS approach
over a wide sample of test cases solving the Euler equations of compressible
gasdynamics in two space dimensions, including shock tube problems, cylindrical
explosion problems, as well as specific tests typically adopted in Lagrangian
calculations, such as the Kidder and the Saltzman problem. When compared to the
traditional global time stepping (GTS) method, the newly proposed LTS algorithm
allows to reduce the number of element updates in a given simulation by a
factor that may depend on the complexity of the dynamics, but which can be as
large as 4.7.
|
[{'version': 'v1', 'created': 'Sat, 16 Aug 2014 07:52:41 GMT'}]
|
2015-06-22
|
[array(['Boscheri', 'Walter', ''], dtype=object)
array(['Dumbser', 'Michael', ''], dtype=object)
array(['Zanotti', 'Olindo', ''], dtype=object)]
|
2,458 |
2204.12354
|
Joseph Eatson
|
J. W. Eatson, J. M. Pittard and S. Van Loo
|
Exploring dust growth in the episodic WCd system WR140
|
9 pages, 9 figures, 5 tables
| null |
10.1093/mnras/stac3000
| null |
astro-ph.SR
|
http://creativecommons.org/licenses/by/4.0/
|
The wind collision region (WCR) in a colliding wind binary (CWB) is a
particularly violent place, as such, it is surprising that it is also a region
where significant quantities of interstellar dust can form. In extreme cases,
approximately 30% of the total mass loss rate of a system can be converted into
dust. These regions are poorly understood, as observation and simulation of
these systems are difficult. In our previous paper we simulated dust growth in
CWB systems using an advected scalar model and found our model to be suitable
for qualitative study. For this paper we simulated the periodic dust forming
CWB (WCd) system WR140 with our dust model, to determine how dust growth
changes over the systems periastron passage. We found that dust production
increases significantly at periastron passage, which is consistent with IR
emission of the surrounding dusty shell. We also find that the dust production
rate of the system decreases rapidly as the stars recede from each other,
though the rate of decrease is significantly lower than the rate of increase
during periastron passage. This was found to be due to strong cooling and its
associated thermal instabilities, resulting in cool, high-density pockets of
gas in the WCR where dust forms. The WCR also shows a degree of hysteresis,
resulting in a radiative post-shock flow even when the stars are separated
enough for the region to behave adiabatically.
|
[{'version': 'v1', 'created': 'Tue, 26 Apr 2022 14:51:23 GMT'}
{'version': 'v2', 'created': 'Mon, 17 Oct 2022 11:15:42 GMT'}]
|
2022-11-16
|
[array(['Eatson', 'J. W.', ''], dtype=object)
array(['Pittard', 'J. M.', ''], dtype=object)
array(['Van Loo', 'S.', ''], dtype=object)]
|
2,459 |
cond-mat/0603315
|
C. W. J. Beenakker
|
J. Tworzydlo, B. Trauzettel, M. Titov, A. Rycerz, C.W.J. Beenakker
|
Quantum-limited shot noise in graphene
|
6 pages, 3 figures; added an appendix with details of the calculation
|
Phys. Rev. Lett. 96, 246802 (2006).
|
10.1103/PhysRevLett.96.246802
| null |
cond-mat.mes-hall
| null |
We calculate the mode-dependent transmission probability of massless Dirac
fermions through an ideal strip of graphene (length L, width W, no impurities
or defects), to obtain the conductance and shot noise as a function of Fermi
energy. We find that the minimum conductivity of order e^2/h at the Dirac point
(when the electron and hole excitations are degenerate) is associated with a
maximum of the Fano factor (the ratio of noise power and mean current). For
short and wide graphene strips the Fano factor at the Dirac point equals 1/3,
three times smaller than for a Poisson process. This is the same value as for a
disordered metal, which is remarkable since the classical dynamics of the Dirac
fermions is ballistic.
|
[{'version': 'v1', 'created': 'Sat, 11 Mar 2006 22:28:08 GMT'}
{'version': 'v2', 'created': 'Wed, 29 Mar 2006 10:43:13 GMT'}
{'version': 'v3', 'created': 'Mon, 10 Apr 2006 08:43:56 GMT'}]
|
2007-05-23
|
[array(['Tworzydlo', 'J.', ''], dtype=object)
array(['Trauzettel', 'B.', ''], dtype=object)
array(['Titov', 'M.', ''], dtype=object)
array(['Rycerz', 'A.', ''], dtype=object)
array(['Beenakker', 'C. W. J.', ''], dtype=object)]
|
2,460 |
1806.00700
|
Petri Hirvonen
|
Petri Hirvonen, Gabriel Martine La Boissoni\`ere, Zheyong Fan,
Cristian-Vasile Achim, Nikolas Provatas, Ken R. Elder, Tapio Ala-Nissila
|
Grain extraction and microstructural analysis method for two-dimensional
poly and quasicrystalline solids
| null |
Phys. Rev. Materials 2, 103603 (2018)
|
10.1103/PhysRevMaterials.2.103603
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
While the microscopic structure of defected solid crystalline materials has
significant impact on their physical properties, efficient and accurate
determination of a given polycrystalline microstructure remains a challenge. In
this paper we present a highly generalizable and reliable variational method to
achieve this goal for two-dimensional crystalline and quasicrystalline
materials. The method is benchmarked and optimized successfully using a variety
of large-scale systems of defected solids, including periodic structures and
quasicrystalline symmetries to quantify their microstructural characteristics,
e.g., grain size and lattice misorientation distributions. We find that many
microstructural properties show universal features independent of the
underlying symmetries.
|
[{'version': 'v1', 'created': 'Sat, 2 Jun 2018 20:18:17 GMT'}]
|
2018-10-24
|
[array(['Hirvonen', 'Petri', ''], dtype=object)
array(['La Boissonière', 'Gabriel Martine', ''], dtype=object)
array(['Fan', 'Zheyong', ''], dtype=object)
array(['Achim', 'Cristian-Vasile', ''], dtype=object)
array(['Provatas', 'Nikolas', ''], dtype=object)
array(['Elder', 'Ken R.', ''], dtype=object)
array(['Ala-Nissila', 'Tapio', ''], dtype=object)]
|
2,461 |
2209.05461
|
Robert L Obenchain PhD
|
Robert L. Obenchain and S. Stanley Young
|
EPA Particulate Matter Data -- Analyses using Local Control Strategy
|
30 pages, 22 figures, 6 tables
|
North Carolina Journal of Mathematics and Statistics, Vol. 9, pp.
1-24, 01/02/2023
| null |
ISSN 2380-7539
|
cs.CY stat.AP
|
http://creativecommons.org/licenses/by/4.0/
|
Statistical Learning methodology for analysis of large collections of
cross-sectional observational data can be most effective when the approach used
is both Nonparametric and Unsupervised. We illustrate use of our NU Learning
approach on 2016 US environmental epidemiology data that we have made freely
available. We encourage other researchers to download these data, apply
whatever methodology they wish, and contribute to development of a broad-based
``consensus view'' of potential effects of Secondary Organic Aerosols (volatile
organic compounds of predominantly biogenic or anthropogenic origin) within
PM2.5 particulate matter on circulatory and/or respiratory mortality. Our
analyses here focus on the question: ``Are regions with relatively high
air-borne biogenic particulate matter also expected to have relatively high
circulatory and/or respiratory mortality?''
|
[{'version': 'v1', 'created': 'Fri, 2 Sep 2022 02:12:37 GMT'}
{'version': 'v2', 'created': 'Sat, 12 Nov 2022 22:41:03 GMT'}
{'version': 'v3', 'created': 'Tue, 20 Dec 2022 03:31:46 GMT'}]
|
2023-01-03
|
[array(['Obenchain', 'Robert L.', ''], dtype=object)
array(['Young', 'S. Stanley', ''], dtype=object)]
|
2,462 |
1501.07178
|
Lorenzo Morelli Dr.
|
L.Morelli, A. Pizzella, E. M. Corsini, E. Dalla Bont\`a, L. Coccato,
J. M\'endez-Abreu, M. Parmiggiani
|
Stellar populations of the bulges of four spiral galaxies
|
11 pages. 7 figures, AN in press. arXiv admin note: text overlap with
arXiv:1203.4284
| null |
10.1002/asna.201412155
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Key information to understand the formation and evolution of disk galaxies
are imprinted in the stellar populations of their bulges. This paper has the
purpose to make available new measurements of the stellar population properties
of the bulges of four spiral galaxies. Both the central values and radial
profiles of the line strength of some of the most common Lick indices are
measured along the major- and minor- axis of the bulge-dominated region of the
sample galaxies. The corresponding age, metallicity, and {\alpha}/Fe ratio are
derived by using the simple stellar population synthesis model predictions. The
central values and the gradients of the stellar population properties of
ESO-LV1890070, ESO-LV4460170, and ESO-LV 5140100 are consistent with previous
findings for bulges of spiral galaxies. On the contrary, the bulge of ESO-LV
4500200 shows peculiar chemical properties possibly due to the presence of a
central kinematically-decoupled component. The negative metallicity gradient
found in our bulges sample indicates a relevant role for the dissipative
collapse in bulge formation. However, the shallow gradients found for the age
and {\alpha}/Fe ratio suggests that merging can not be completely ruled out for
the sample bulges. This is confirmed by the properties of ESO-LV 4500200 which
can hardly be explained without invoking the capture of external material.
|
[{'version': 'v1', 'created': 'Wed, 28 Jan 2015 16:28:26 GMT'}]
|
2015-06-23
|
[array(['Morelli', 'L.', ''], dtype=object)
array(['Pizzella', 'A.', ''], dtype=object)
array(['Corsini', 'E. M.', ''], dtype=object)
array(['Bontà', 'E. Dalla', ''], dtype=object)
array(['Coccato', 'L.', ''], dtype=object)
array(['Méndez-Abreu', 'J.', ''], dtype=object)
array(['Parmiggiani', 'M.', ''], dtype=object)]
|
2,463 |
1603.00198
|
Martin Merker
|
Martin Merker
|
Decomposing highly edge-connected graphs into homomorphic copies of a
fixed tree
|
18 pages
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Tree Decomposition Conjecture by Bar\'at and Thomassen states that for
every tree $T$ there exists a natural number $k(T)$ such that the following
holds: If $G$ is a $k(T)$-edge-connected simple graph with size divisible by
the size of $T$, then $G$ can be edge-decomposed into subgraphs isomorphic to
$T$. So far this conjecture has only been verified for paths, stars, and a
family of bistars. We prove a weaker version of the Tree Decomposition
Conjecture, where we require the subgraphs in the decomposition to be
isomorphic to graphs that can be obtained from $T$ by vertex-identifications.
We call such a subgraph a homomorphic copy of $T$. This implies the Tree
Decomposition Conjecture under the additional constraint that the girth of $G$
is greater than the diameter of $T$. As an application, we verify the Tree
Decomposition Conjecture for all trees of diameter at most 4.
|
[{'version': 'v1', 'created': 'Tue, 1 Mar 2016 09:30:15 GMT'}]
|
2016-03-02
|
[array(['Merker', 'Martin', ''], dtype=object)]
|
2,464 |
1401.3551
|
Cris Negron
|
Cris Negron
|
Spectral Sequences for the Cohomology Rings of a Smash Product
|
21 pages
| null | null | null |
math.KT math.QA math.RA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Stefan and Guichardet have provided Lyndon-Hochschild-Serre type spectral
sequences which converge to the Hochschild cohomology and Ext groups of a smash
product. We show that these spectral sequences carry natural multiplicative
structures, and that these multiplicative structures can be used to calculate
the cup product on Hochschild cohomology and the Yoneda product on an Ext
algebra.
|
[{'version': 'v1', 'created': 'Wed, 15 Jan 2014 11:37:17 GMT'}
{'version': 'v2', 'created': 'Fri, 16 May 2014 04:24:00 GMT'}]
|
2014-05-19
|
[array(['Negron', 'Cris', ''], dtype=object)]
|
2,465 |
2003.12673
|
Amit Kohli
|
Amit Kohli, Vincent Sitzmann, Gordon Wetzstein
|
Semantic Implicit Neural Scene Representations With Semi-Supervised
Training
|
3DV 2020 Camera Ready
https://www.computationalimaging.org/publications/
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The recent success of implicit neural scene representations has presented a
viable new method for how we capture and store 3D scenes. Unlike conventional
3D representations, such as point clouds, which explicitly store scene
properties in discrete, localized units, these implicit representations encode
a scene in the weights of a neural network which can be queried at any
coordinate to produce these same scene properties. Thus far, implicit
representations have primarily been optimized to estimate only the appearance
and/or 3D geometry information in a scene. We take the next step and
demonstrate that an existing implicit representation (SRNs) is actually
multi-modal; it can be further leveraged to perform per-point semantic
segmentation while retaining its ability to represent appearance and geometry.
To achieve this multi-modal behavior, we utilize a semi-supervised learning
strategy atop the existing pre-trained scene representation. Our method is
simple, general, and only requires a few tens of labeled 2D segmentation masks
in order to achieve dense 3D semantic segmentation. We explore two novel
applications for this semantically aware implicit neural scene representation:
3D novel view and semantic label synthesis given only a single input RGB image
or 2D label mask, as well as 3D interpolation of appearance and semantics.
|
[{'version': 'v1', 'created': 'Sat, 28 Mar 2020 00:43:17 GMT'}
{'version': 'v2', 'created': 'Sun, 17 Jan 2021 01:53:26 GMT'}]
|
2021-01-19
|
[array(['Kohli', 'Amit', ''], dtype=object)
array(['Sitzmann', 'Vincent', ''], dtype=object)
array(['Wetzstein', 'Gordon', ''], dtype=object)]
|
2,466 |
1701.00948
|
Gabriele Fici
|
Gabriele Fici, Filippo Mignosi, Jeffrey Shallit
|
Abelian-Square-Rich Words
|
To appear in Theoretical Computer Science. Corrected a flaw in the
proof of Proposition 7
| null |
10.1016/j.tcs.2017.02.012
| null |
cs.DM cs.FL math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An abelian square is the concatenation of two words that are anagrams of one
another. A word of length $n$ can contain at most $\Theta(n^2)$ distinct
factors, and there exist words of length $n$ containing $\Theta(n^2)$ distinct
abelian-square factors, that is, distinct factors that are abelian squares.
This motivates us to study infinite words such that the number of distinct
abelian-square factors of length $n$ grows quadratically with $n$. More
precisely, we say that an infinite word $w$ is {\it abelian-square-rich} if,
for every $n$, every factor of $w$ of length $n$ contains, on average, a number
of distinct abelian-square factors that is quadratic in $n$; and {\it uniformly
abelian-square-rich} if every factor of $w$ contains a number of distinct
abelian-square factors that is proportional to the square of its length. Of
course, if a word is uniformly abelian-square-rich, then it is
abelian-square-rich, but we show that the converse is not true in general. We
prove that the Thue-Morse word is uniformly abelian-square-rich and that the
function counting the number of distinct abelian-square factors of length $2n$
of the Thue-Morse word is $2$-regular. As for Sturmian words, we prove that a
Sturmian word $s_{\alpha}$ of angle $\alpha$ is uniformly abelian-square-rich
if and only if the irrational $\alpha$ has bounded partial quotients, that is,
if and only if $s_{\alpha}$ has bounded exponent.
|
[{'version': 'v1', 'created': 'Wed, 4 Jan 2017 10:16:30 GMT'}
{'version': 'v2', 'created': 'Mon, 13 Feb 2017 16:02:50 GMT'}
{'version': 'v3', 'created': 'Fri, 24 Feb 2017 17:14:54 GMT'}]
|
2017-02-27
|
[array(['Fici', 'Gabriele', ''], dtype=object)
array(['Mignosi', 'Filippo', ''], dtype=object)
array(['Shallit', 'Jeffrey', ''], dtype=object)]
|
2,467 |
1803.06565
|
Reyhaneh Taj
|
Reyhaneh Taj and Afshin Namiranian
|
Effect of Electron-RBM Phonon Interaction on Conductance of carbon
nanotubes
| null | null |
10.1016/j.physe.2018.05.014
| null |
cond-mat.mes-hall cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We use the energy analysis as a perturbative method to study the effect of
electron-radial breathing mode (RBM) phonon interaction on the electrical
conductivity of long metallic zigzag carbon nanotubes (CNTs). The band
structure of zigzag CNTs is calculated by exerting zone-folding method on
relations derived by using the nearest neighbor approximation of tight-binding
expression for the $\pi$ valence and conduction bands of graphene. The small
hollow cylinder model, with two different approximations, is used to obtain the
RBM frequency in our calculation. As the result, we have calculated the effects
of electron$ - $RBM phonon interaction on the conductance of zigzag CNTs. It
has been observed that current is a step$ - $like function of bias voltage
because of the absorption or emission by electron injection in the system.
Moreover, the dependence of the conductance to the temperature in low bias and
high bias voltages has been studied. In this paper, we propose a simple and
useful method for phonon spectroscopy. Also, since RBM mode determines the
geometry and structure of CNT, this approach can be used for characterization
of CNTs.
|
[{'version': 'v1', 'created': 'Sat, 17 Mar 2018 20:11:50 GMT'}
{'version': 'v2', 'created': 'Sat, 5 May 2018 20:16:04 GMT'}]
|
2018-05-29
|
[array(['Taj', 'Reyhaneh', ''], dtype=object)
array(['Namiranian', 'Afshin', ''], dtype=object)]
|
2,468 |
math/0703613
|
David B. Massey
|
David B. Massey
|
Real Analytic Milnor Fibrations and a Strong \L ojasiewicz Inequality
|
20 pages
| null | null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We give a strong version of a classic inequality of \L ojasiewicz; one which
collapses to the usual inequality in the complex analytic case. We show that
this inequality for a pair, quadruple, or octuple of real analytic functions
allows us to construct a real Milnor fibration inside a ball.
|
[{'version': 'v1', 'created': 'Tue, 20 Mar 2007 21:04:04 GMT'}
{'version': 'v2', 'created': 'Tue, 5 Feb 2008 16:47:34 GMT'}
{'version': 'v3', 'created': 'Mon, 9 Jun 2008 14:56:15 GMT'}
{'version': 'v4', 'created': 'Mon, 30 Jun 2008 01:18:07 GMT'}
{'version': 'v5', 'created': 'Sat, 29 Nov 2008 20:21:19 GMT'}]
|
2008-11-29
|
[array(['Massey', 'David B.', ''], dtype=object)]
|
2,469 |
2103.08815
|
Jianjun Zhao
|
Jianjun Zhao
|
Some Size and Structure Metrics for Quantum Software
|
The short version of this paper will appear in the proceedings of the
Second International Workshop on Quantum Software Engineering (Q-SE 2021)
co-located with ICSE 2021
| null | null | null |
cs.SE quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
Quantum software plays a critical role in exploiting the full potential of
quantum computing systems. As a result, it is drawing increasing attention
recently. As research in quantum programming reaches maturity with a number of
active research and practical products, software metric researchers need to
focus on this new paradigm to evaluate it rigorously and quantitatively. As the
first step, this paper proposes some basic metrics for quantum software, which
mainly focus on measuring the size and structure of quantum software. These
metrics are defined at different abstraction levels to represent various size
and structure attributes in quantum software explicitly. The proposed metrics
can be used to evaluate quantum software from various viewpoints.
|
[{'version': 'v1', 'created': 'Tue, 16 Mar 2021 02:53:17 GMT'}]
|
2021-03-17
|
[array(['Zhao', 'Jianjun', ''], dtype=object)]
|
2,470 |
0903.2161
|
Anjan Joshipura
|
Anjan S. Joshipura, Bhavik P. Kodrani and Ketan M. Patel
|
Fermion Masses and Mixings in a $\mu$-$\tau$ symmetric SO(10)
|
22 pages, six postscript figures
|
Phys.Rev.D79:115017,2009
|
10.1103/PhysRevD.79.115017
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
$\mu$-$\tau$ symmetry imposed on the neutrino mass matrix in the flavour
basis is known to be quite predictive. We integrate this very specific neutrino
symmetry into a more general framework based on the supersymmetric SO(10) grand
unified theory. As in several other models, the fermion mass spectrum is
determined by Hermitian mass matrices resulting from the renormalizable Yukawa
couplings of the 16-plet of fermions with the Higgs fields transforming as $10,
\bar{126},120$ representations of the SO(10) group. The $\mu$-$\tau$ symmetry
is spontaneously broken through the 120-plet. Consequences of this scheme are
considered for fermion masses using both type-I and type-II seesaw mechanism.
This scenario is shown to lead to a generalized CP invariance of the mass
matrices and vanishing CP violating phases if the Yukawa couplings are
invariant under the $\mu$-$\tau$ symmetry. Small explicit breaking of the
$\mu$-$\tau$ symmetry is then shown to provide a very good understanding of all
the fermion masses and mixing. Detailed fits to the fermion spectrum are
presented in several scenarios. One obtains a very good fit to all observables
in the context of the type-I seesaw mechanism but type-II seesaw model also
provides a good description except for the overall scale of the neutrino
masses. Three major predictions on the leptonic mixing parameters in the type-I
seesaw case are (1) the atmospheric mixing angle $\theta_{23}^{l}$ close to
maximal, (2) $\theta_{13}^{l}$ close to the present upper bound and (3)
negative but very small Dirac CP violating phase in the neutrino oscillations.
|
[{'version': 'v1', 'created': 'Thu, 12 Mar 2009 12:40:01 GMT'}]
|
2010-11-30
|
[array(['Joshipura', 'Anjan S.', ''], dtype=object)
array(['Kodrani', 'Bhavik P.', ''], dtype=object)
array(['Patel', 'Ketan M.', ''], dtype=object)]
|
2,471 |
2111.15016
|
Brian Yan
|
Brian Yan, Chunlei Zhang, Meng Yu, Shi-Xiong Zhang, Siddharth Dalmia,
Dan Berrebbi, Chao Weng, Shinji Watanabe, Dong Yu
|
Joint Modeling of Code-Switched and Monolingual ASR via Conditional
Factorization
| null | null | null | null |
cs.CL cs.SD eess.AS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Conversational bilingual speech encompasses three types of utterances: two
purely monolingual types and one intra-sententially code-switched type. In this
work, we propose a general framework to jointly model the likelihoods of the
monolingual and code-switch sub-tasks that comprise bilingual speech
recognition. By defining the monolingual sub-tasks with label-to-frame
synchronization, our joint modeling framework can be conditionally factorized
such that the final bilingual output, which may or may not be code-switched, is
obtained given only monolingual information. We show that this conditionally
factorized joint framework can be modeled by an end-to-end differentiable
neural network. We demonstrate the efficacy of our proposed model on bilingual
Mandarin-English speech recognition across both monolingual and code-switched
corpora.
|
[{'version': 'v1', 'created': 'Mon, 29 Nov 2021 23:14:54 GMT'}]
|
2021-12-01
|
[array(['Yan', 'Brian', ''], dtype=object)
array(['Zhang', 'Chunlei', ''], dtype=object)
array(['Yu', 'Meng', ''], dtype=object)
array(['Zhang', 'Shi-Xiong', ''], dtype=object)
array(['Dalmia', 'Siddharth', ''], dtype=object)
array(['Berrebbi', 'Dan', ''], dtype=object)
array(['Weng', 'Chao', ''], dtype=object)
array(['Watanabe', 'Shinji', ''], dtype=object)
array(['Yu', 'Dong', ''], dtype=object)]
|
2,472 |
2306.07355
|
Giorgio Di Tizio
|
Fabio Massacci, Giorgio Di Tizio
|
Are Software Updates Useless Against Advanced Persistent Threats?
| null |
Communications of the ACM 66, 1 (2023)
|
10.1145/3571452
| null |
cs.SE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A dilemma worth Shakespeare's Hamlet is increasingly haunting companies and
security researchers: ``to update or not to update, this is the question``.
From the perspective of recommended common practices by software vendors the
answer is unambiguous: you should keep your software up-to-date. But is common
sense always good sense? We argue it is not.
|
[{'version': 'v1', 'created': 'Mon, 12 Jun 2023 18:24:40 GMT'}]
|
2023-06-14
|
[array(['Massacci', 'Fabio', ''], dtype=object)
array(['Di Tizio', 'Giorgio', ''], dtype=object)]
|
2,473 |
astro-ph/0108263
|
Kim A. Venn
|
K.A. Venn, A.M. Brooks, D.L. Lambert, M. Lemke, N. Langer, D.J.
Lennon, F.P. Keenan
|
Boron Abundances in Main Sequence B-type Stars: A Test of Rotational
Depletion during Main Sequence Evolution
|
31 pages, 14 figures. accepted to ApJ
| null |
10.1086/324435
| null |
astro-ph
| null |
Boron abundances have been derived for seven main sequence B-type stars from
HST STIS spectra around the B III 2066 A line. In two stars, boron appears to
be undepleted with respect to the presumed initial abundance. In one star,
boron is detectable but it is clearly depleted. In the other four stars, boron
is undetectable implying depletions of 1 to 2 dex. Three of these four stars
are nitrogen enriched, but the fourth shows no enrichment of nitrogen. Only
rotationally induced mixing predicts that boron depletions are unaccompanied by
nitrogen enrichments. The inferred rate of boron depletion from our
observations is in good agreement with these predictions. Other boron-depleted
nitrogen-normal stars are identified from the literature. Also, several
boron-depleted nitrogen-rich stars are identified, and while all fall on the
boron-nitrogen trend predicted by rotationally-induced mixing, a majority have
nitrogen enrichments that are not uniquely explained by rotation.
The spectra have also been used to determine iron-group (Cr, Mn, Fe, and Ni)
abundances. The seven B-type stars have near solar iron-group abundances, as
expected for young stars in the solar neighborhood. We have also analysed the
halo B-type star, PG0832+676. We find [Fe/H] = -0.88 +/- 0.10, and the absence
of the B III line gives the upper limit [B/H]<2.5. These and other published
abundances are used to infer the star's evolutionary status as a post-AGB star.
|
[{'version': 'v1', 'created': 'Wed, 15 Aug 2001 19:04:30 GMT'}]
|
2009-11-07
|
[array(['Venn', 'K. A.', ''], dtype=object)
array(['Brooks', 'A. M.', ''], dtype=object)
array(['Lambert', 'D. L.', ''], dtype=object)
array(['Lemke', 'M.', ''], dtype=object)
array(['Langer', 'N.', ''], dtype=object)
array(['Lennon', 'D. J.', ''], dtype=object)
array(['Keenan', 'F. P.', ''], dtype=object)]
|
2,474 |
2103.09163
|
Harry Jonathon Mamin
|
H. J. Mamin, E. Huang, S. Carnevale, C. T. Rettner, N. Arellano, M. H.
Sherwood, C. Kurter, B. Trimm, M. Sandberg, R. M. Shelby, M. A. Mueed, B. A.
Madon, A. Pushp, M. Steffen, and D. Rugar
|
Merged-Element Transmons: Design and Qubit Performance
|
7 pages, 4 figures Added references Performed minor editing for
clarity Made minor formatting changes to figures
|
Phys. Rev. Applied 16, 024023 (2021)
|
10.1103/PhysRevApplied.16.024023
| null |
quant-ph cond-mat.supr-con physics.app-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have demonstrated a novel type of superconducting transmon qubit in which
a Josephson junction has been engineered to act as its own parallel shunt
capacitor. This merged-element transmon (MET) potentially offers a smaller
footprint and simpler fabrication than conventional transmons. Because it
concentrates the electromagnetic energy inside the junction, it reduces
relative electric field participation from other interfaces. By combining
micrometer-scale Al/AlOx/Al junctions with long oxidations and novel
processing, we have produced functional devices with $E_{J}$/$E_{C}$ in the low
transmon regime ($E_{J}$/$E_{C}$ $\lesssim$30). Cryogenic I-V measurements show
sharp dI/dV structure with low sub-gap conduction. Qubit spectroscopy of
tunable versions show a small number of avoided level crossings, suggesting the
presence of two-level systems (TLS). We have observed mean T1 times typically
in the range of 10-90 microseconds, with some annealed devices exhibiting T1 >
100 microseconds over several hours. The results suggest that energy relaxation
in conventional, small-junction transmons is not limited by junction loss.
|
[{'version': 'v1', 'created': 'Tue, 16 Mar 2021 16:04:35 GMT'}
{'version': 'v2', 'created': 'Fri, 13 Aug 2021 19:44:22 GMT'}]
|
2021-08-18
|
[array(['Mamin', 'H. J.', ''], dtype=object)
array(['Huang', 'E.', ''], dtype=object)
array(['Carnevale', 'S.', ''], dtype=object)
array(['Rettner', 'C. T.', ''], dtype=object)
array(['Arellano', 'N.', ''], dtype=object)
array(['Sherwood', 'M. H.', ''], dtype=object)
array(['Kurter', 'C.', ''], dtype=object)
array(['Trimm', 'B.', ''], dtype=object)
array(['Sandberg', 'M.', ''], dtype=object)
array(['Shelby', 'R. M.', ''], dtype=object)
array(['Mueed', 'M. A.', ''], dtype=object)
array(['Madon', 'B. A.', ''], dtype=object)
array(['Pushp', 'A.', ''], dtype=object)
array(['Steffen', 'M.', ''], dtype=object)
array(['Rugar', 'D.', ''], dtype=object)]
|
2,475 |
2004.09529
|
Zhong Wang
|
Wen-Tan Xue, Ming-Rui Li, Yu-Min Hu, Fei Song, Zhong Wang
|
Simple formulas of directional amplification from non-Bloch band theory
|
11 pages, 7 figures, including Supplemental Material
|
Phys. Rev. B 103, L241408 (2021)
|
10.1103/PhysRevB.103.L241408
| null |
cond-mat.mes-hall cond-mat.quant-gas physics.optics quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Green's functions are fundamental quantities that determine the linear
responses of physical systems. The recent developments of non-Hermitian
systems, therefore, call for Green's function formulas of non-Hermitian bands.
This task is complicated by the high sensitivity of energy spectrums to
boundary conditions, which invalidates the straightforward generalization of
Hermitian formulas. Here, based on the non-Bloch band theory, we obtain simple
Green's function formulas of general one-dimensional non-Hermitian bands.
Furthermore, in the large-size limit, these formulas dramatically reduce to
finding the roots of a simple algebraic equation. As an application, our
formulation provides the desirable formulas for the defining quantities, the
gain and directionality, of directional amplification. Thus, our formulas
provide an efficient guide for designing directional amplifiers.
|
[{'version': 'v1', 'created': 'Mon, 20 Apr 2020 18:00:04 GMT'}
{'version': 'v2', 'created': 'Tue, 29 Jun 2021 05:19:01 GMT'}]
|
2021-12-17
|
[array(['Xue', 'Wen-Tan', ''], dtype=object)
array(['Li', 'Ming-Rui', ''], dtype=object)
array(['Hu', 'Yu-Min', ''], dtype=object)
array(['Song', 'Fei', ''], dtype=object)
array(['Wang', 'Zhong', ''], dtype=object)]
|
2,476 |
2201.04084
|
Shady E. Ahmed
|
Shady E. Ahmed, Omer San, Diana A. Bistrian, Ionel M. Navon
|
Sketching Methods for Dynamic Mode Decomposition in Spherical Shallow
Water Equations
| null |
AIAA SciTech 2022 Forum
|
10.2514/6.2022-2325
| null |
math.NA cs.NA math.DS physics.ao-ph physics.data-an physics.flu-dyn
|
http://creativecommons.org/licenses/by/4.0/
|
Dynamic mode decomposition (DMD) is an emerging methodology that has recently
attracted computational scientists working on nonintrusive reduced order
modeling. One of the major strengths that DMD possesses is having ground
theoretical roots from the Koopman approximation theory. Indeed, DMD may be
viewed as the data-driven realization of the famous Koopman operator.
Nonetheless, the stable implementation of DMD incurs computing the singular
value decomposition of the input data matrix. This, in turn, makes the process
computationally demanding for high dimensional systems. In order to alleviate
this burden, we develop a framework based on sketching methods, wherein a
sketch of a matrix is simply another matrix which is significantly smaller, but
still sufficiently approximates the original system. Such sketching or
embedding is performed by applying random transformations, with certain
properties, on the input matrix to yield a compressed version of the initial
system. Hence, many of the expensive computations can be carried out on the
smaller matrix, thereby accelerating the solution of the original problem. We
conduct numerical experiments conducted using the spherical shallow water
equations as a prototypical model in the context of geophysical flows. The
performance of several sketching approaches is evaluated for capturing the
range and co-range of the data matrix. The proposed sketching-based framework
can accelerate various portions of the DMD algorithm, compared to classical
methods that operate directly on the raw input data. This eventually leads to
substantial computational gains that are vital for digital twinning of high
dimensional systems.
|
[{'version': 'v1', 'created': 'Tue, 11 Jan 2022 17:20:14 GMT'}]
|
2022-01-12
|
[array(['Ahmed', 'Shady E.', ''], dtype=object)
array(['San', 'Omer', ''], dtype=object)
array(['Bistrian', 'Diana A.', ''], dtype=object)
array(['Navon', 'Ionel M.', ''], dtype=object)]
|
2,477 |
1111.5639
|
Seifedine Kadry Seifedine Kadry
|
Seifedine Kadry, Mohamad Smaili, Hussam Kassem, Hassan Hayek
|
A New Technique to Backup and Restore DBMS using XML and .NET
Technologies
| null |
International Journal on Computer Science and Engineering Vol. 02,
No. 04, 2010, 1092-1102
| null | null |
cs.DB
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we proposed a new technique for backing up and restoring
different Database Management Systems (DBMS). The technique is enabling to
backup and restore a part of or the whole database using a unified interface
using ASP.NET and XML technologies. It presents a Web Solution allowing the
administrators to do their jobs from everywhere, locally or remotely. To show
the importance of our solution, we have taken two case studies, oracle 11g and
SQL Server 2008.
|
[{'version': 'v1', 'created': 'Wed, 23 Nov 2011 22:28:38 GMT'}]
|
2011-11-28
|
[array(['Kadry', 'Seifedine', ''], dtype=object)
array(['Smaili', 'Mohamad', ''], dtype=object)
array(['Kassem', 'Hussam', ''], dtype=object)
array(['Hayek', 'Hassan', ''], dtype=object)]
|
2,478 |
astro-ph/0303154
|
David Garcia-Alvarez
|
D. Garcia-Alvarez (1), J.R. Barnes (2), A. Collier Cameron (2), J.G.
Doyle (1), S. Messina (3), A.F. Lanza (3), M. Rodono (4) ((1) Armagh
Observatory, (2) University of St Andrews, (3) Catania Astrophysical
Observatory, (4) Catania University)
|
Doppler Images of the RS CVn Binary HR 1099 (V711 Tau) from the MUSICOS
1998 Campaign
|
12 pages, 9 figures. Accepted by A&A
|
Astron.Astrophys. 402 (2003) 1073-1084
|
10.1051/0004-6361:20030288
| null |
astro-ph
| null |
We present Doppler Images of the RS CVn binary system HR 1099 (V711
Tau) from spectra taken in two different sites, KPNO and MSO, during the
MUSICO S 1998 campaign. Contemporaneous APT photometry is used to constrain the
Doppler Images. The resulting maximum entropy reconstructions based on the
least-square s deconvolved profiles, derived from $\sim$2000 photospheric
absorption lines, r eveal the presence of starspots at medium-high latitudes.
We have obtained maps for both components of the binary system for the first
time. The predominant str ucture in the primary component is an off-centered
polar spot, confirming previo us works on the same target by using independent
codes. The result is verified b y using both data sets independently. The lower
spectral resolution data set giv es a less detailed map for the MSO data set.
The images obtained for the seconda ry component show a low latitude spot
around orbital phase 0.7. This spot seems to mirror the structure seen on the
primary. It might suggest that tidal forces may influence the spot distribution
on this binary system.
|
[{'version': 'v1', 'created': 'Fri, 7 Mar 2003 00:43:42 GMT'}]
|
2009-11-07
|
[array(['Garcia-Alvarez', 'D.', ''], dtype=object)
array(['Barnes', 'J. R.', ''], dtype=object)
array(['Cameron', 'A. Collier', ''], dtype=object)
array(['Doyle', 'J. G.', ''], dtype=object)
array(['Messina', 'S.', ''], dtype=object)
array(['Lanza', 'A. F.', ''], dtype=object)
array(['Rodono', 'M.', ''], dtype=object)]
|
2,479 |
astro-ph/0509024
|
Stefano Ettori
|
S. Ettori, K. Dolag, S. Borgani, G. Murante
|
The baryon fraction in hydrodynamical simulations of galaxy clusters
|
10 pages, to appear in MNRAS
|
Mon.Not.Roy.Astron.Soc.365:1021-1030,2006
|
10.1111/j.1365-2966.2005.09788.x
| null |
astro-ph
| null |
We study the baryon mass fraction in a set of hydrodynamical simulations of
galaxy clusters performed using the Tree+SPH code GADGET-2. We investigate the
dependence of the baryon fraction upon the radiative cooling, star formation,
feedback through galactic winds, conduction and redshift. Both the cold stellar
component and the hot X-ray emitting gas have narrow distributions that, at
large cluster-centric distances r>R500, are nearly independent of the physics
included in the simulations. Only the non-radiative runs reproduce the gas
fraction inferred from observations of the inner regions (r ~ R2500) of massive
clusters. When cooling is turned on, the excess star formation is mitigated by
the action of galactic winds, but yet not by the amount required by
observational data. The baryon fraction within a fixed overdensity increases
slightly with redshift, independent of the physical processes involved in the
accumulation of baryons in the cluster potential well. In runs with cooling and
feedback, the increase in baryons is associated with a larger stellar mass
fraction that arises at high redshift as a consequence of more efficient gas
cooling. For the same reason, the gas fraction appears less concentrated at
higher redshift. We discuss the possible cosmological implications of our
results and find that two assumptions generally adopted, (1) mean value of Yb =
fb / (Omega_b/Omega_m) not evolving with redshift, and (2) a fixed ratio
between f_star and f_gas independent of radius and redshift, might not be
valid. In the estimate of the cosmic matter density parameter, this implies
some systematic effects of the order of Delta Omega_m/Omega_m < +0.15 for
non-radiative runs and Delta Omega_m/Omega_m ~ +0.05 and < -0.05 for radiative
simulations.
|
[{'version': 'v1', 'created': 'Thu, 1 Sep 2005 14:20:29 GMT'}]
|
2009-11-13
|
[array(['Ettori', 'S.', ''], dtype=object)
array(['Dolag', 'K.', ''], dtype=object)
array(['Borgani', 'S.', ''], dtype=object)
array(['Murante', 'G.', ''], dtype=object)]
|
2,480 |
1102.0779
|
Victor Silva Aguirre
|
V. Silva Aguirre (MPA), J. Ballot (LATT), A.M. Serenelli (MPA,
CSIC-IEEC), A. Weiss (MPA)
|
Constraining mixing processes in stellar cores using asteroseismology.
Impact of semiconvection in low-mass stars
|
13 pages, 9 figures, accepted for publication in A&A
| null |
10.1051/0004-6361/201015847
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The overall evolution of low-mass stars is heavily influenced by the
processes occurring in the stellar interior. In particular, mixing processes in
convectively unstable zones and overshooting regions affect the resulting
observables and main sequence lifetime. We study the effects of different
convective boundary definitions and mixing prescriptions in convective cores of
low-mass stars, to discriminate the existence, size, and evolutionary stage of
the central mixed zone by means of asteroseismology. We implemented the Ledoux
criterion for convection in our stellar evolution code, together with a
time-dependent diffusive approach for mixing of elements when semiconvective
zones are present. We compared models with masses ranging from 1 M* to 2 M*
computed with two different criteria for convective boundary definition and
including different mixing prescriptions within and beyond the formal limits of
the convective regions. Using calculations of adiabatic oscillations
frequencies for a large set of models, we developed an asteroseismic diagnosis
using only l=0 and l=1 modes based on the ratios of small to large separations
r01 and r10 defined by Roxburgh & Vorontsov (2003). These variables are almost
linear in the expected observable frequency range, and we show that their slope
depends simultaneously on the central hydrogen content, the extent of the
convective core, and the amplitude of the sound-speed discontinuity at the core
boundary. By considering about 25 modes and an accuracy in the frequency
determinations as expected from the CoRoT and Kepler missions, the technique we
propose allows us to detect the presence of a convective core and to
discriminate the different sizes of the homogeneously mixed central region
without the need of a strong a priori for the stellar mass.
|
[{'version': 'v1', 'created': 'Thu, 3 Feb 2011 21:00:10 GMT'}]
|
2015-05-27
|
[array(['Aguirre', 'V. Silva', '', 'MPA'], dtype=object)
array(['Ballot', 'J.', '', 'LATT'], dtype=object)
array(['Serenelli', 'A. M.', '', 'MPA,\n CSIC-IEEC'], dtype=object)
array(['Weiss', 'A.', '', 'MPA'], dtype=object)]
|
2,481 |
2204.04505
|
Vikash Pandey
|
Vikash Pandey, Dhrubaditya Mitra, and Prasad Perlekar
|
Kolmogorov turbulence co-exists with pseudo-turbulence in
buoyancy-driven bubbly flows
| null | null | null | null |
physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate spectral properties of buoyancy driven bubbly flows. Using
high-resolution numerical simulations and phenomenology of homogeneous
turbulence, we identify the relevant energy transfer mechanisms. We find: (a)
At high enough Galilei number (ratio of the buoyancy to viscous forces) the
kinetic energy spectrum shows the Kolmogorov scaling with a power law exponent
$-5/3$ for the range of scales between the bubble diameter and the dissipation
scale ($\eta$). (b) For scales smaller than $\eta$, the physics of
pseudo-turbulence is recovered.
|
[{'version': 'v1', 'created': 'Sat, 9 Apr 2022 16:09:57 GMT'}]
|
2022-04-12
|
[array(['Pandey', 'Vikash', ''], dtype=object)
array(['Mitra', 'Dhrubaditya', ''], dtype=object)
array(['Perlekar', 'Prasad', ''], dtype=object)]
|
2,482 |
0711.3515
|
Kenji Bekki dr
|
Kenji Bekki, Masashi Chiba, and N. M. McClure-Griffiths
|
The Magellanic impact: Collision between the outer Galactic HI disk and
the leading arms of the Magellanic stream
|
13pages, 4 figures, accepted by ApJL
| null |
10.1086/526456
| null |
astro-ph
| null |
We show that collisions between the outer Galactic HI disk and the leading
arms (LAs) of the Magellanic stream (MS) can create giant HI holes and
chimney-like structures in the disk. Based on the results of our N-body
simulations on the last 2.5 Gyr evolution of the Large and Small Magellanic
Clouds (LMC and SMC, respectively) interacting with the Galaxy, we investigate
when and where the LAs can pass through the Galactic plane after the MS
formation. We then investigate hydrodynamical interaction between LAs and the
Galactic HI disk (``the Magellanic impact'') by using our new hydrodynamical
simulations with somewhat idealized models of the LAs. We find that about 1-3%
of the initial gas mass of the SMC, which consists of the LAs, can pass through
the outer part (R=20-35 kpc) of the Galactic HI disk about 0.2 Gyr ago. We also
find that the Magellanic impact can push out some fraction (~1%) of the outer
Galactic HI disk to form 1-10 kpc-scale HI holes and chimney-like bridges
between the LAs and the disk.
|
[{'version': 'v1', 'created': 'Thu, 22 Nov 2007 08:07:02 GMT'}]
|
2009-11-13
|
[array(['Bekki', 'Kenji', ''], dtype=object)
array(['Chiba', 'Masashi', ''], dtype=object)
array(['McClure-Griffiths', 'N. M.', ''], dtype=object)]
|
2,483 |
1910.00757
|
Himel Dev
|
Himel Dev, Karrie Karahalios and Hari Sundaram
|
Quantifying Voter Biases in Online Platforms: An Instrumental Variable
Approach
|
The 22nd ACM Conference on Computer-Supported Cooperative Work and
Social Computing (CSCW), 2019
|
Proceedings of the ACM on Human Computer Interaction, Vol. 3, No.
CSCW, Article 120. Publication date: November 2019
|
10.1145/3359222
| null |
cs.SI cs.CY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In content-based online platforms, use of aggregate user feedback (say, the
sum of votes) is commonplace as the "gold standard" for measuring content
quality. Use of vote aggregates, however, is at odds with the existing
empirical literature, which suggests that voters are susceptible to different
biases -- reputation (e.g., of the poster), social influence (e.g., votes thus
far), and position (e.g., answer position). Our goal is to quantify, in an
observational setting, the degree of these biases in online platforms.
Specifically, what are the causal effects of different impression signals --
such as the reputation of the contributing user, aggregate vote thus far, and
position of content -- on a participant's vote on content? We adopt an
instrumental variable (IV) framework to answer this question. We identify a set
of candidate instruments, carefully analyze their validity, and then use the
valid instruments to reveal the effects of the impression signals on votes. Our
empirical study using log data from Stack Exchange websites shows that the bias
estimates from our IV approach differ from the bias estimates from the ordinary
least squares (OLS) method. In particular, OLS underestimates reputation bias
(1.6--2.2x for gold badges) and position bias (up to 1.9x for the initial
position) and overestimates social influence bias (1.8--2.3x for initial
votes). The implications of our work include: redesigning user interface to
avoid voter biases; making changes to platforms' policy to mitigate voter
biases; detecting other forms of biases in online platforms.
|
[{'version': 'v1', 'created': 'Wed, 2 Oct 2019 03:00:36 GMT'}]
|
2019-10-03
|
[array(['Dev', 'Himel', ''], dtype=object)
array(['Karahalios', 'Karrie', ''], dtype=object)
array(['Sundaram', 'Hari', ''], dtype=object)]
|
2,484 |
1107.2585
|
Kazuya Ando
|
Kazuya Ando and Eiji Saitoh
|
Observation of the inverse spin Hall effect in silicon
|
8 pages, 4 figures, Accepted for publication in Nature Communications
| null |
10.1038/ncomms1640
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The spin-orbit interaction in a solid couples the spin of an electron to its
momentum. This coupling gives rise to mutual conversion between spin and charge
currents: the direct and inverse spin Hall effects. The spin Hall effects have
been observed in metals and semiconductors. However, the spin/charge conversion
has not been realized in one of the most fundamental semiconductors, silicon,
where accessing the spin Hall effects has been believed to be difficult because
of its very weak spin-orbit interaction. Here we report observation of the
inverse spin Hall effect in silicon at room temperature. The spin/charge
current conversion efficiency, the spin Hall angle, is obtained as 0.0001 for a
p-type silicon film. In spite of the small spin Hall angle, we found a clear
electric voltage due to the inverse spin Hall effect in the p-Si film,
demonstrating that silicon can be used as a spin-current detector.
|
[{'version': 'v1', 'created': 'Wed, 13 Jul 2011 16:18:13 GMT'}
{'version': 'v2', 'created': 'Sun, 11 Dec 2011 07:31:17 GMT'}]
|
2015-05-28
|
[array(['Ando', 'Kazuya', ''], dtype=object)
array(['Saitoh', 'Eiji', ''], dtype=object)]
|
2,485 |
astro-ph/0008158
|
Geraint F. Lewis
|
Geraint F. Lewis, Rodrigo A. Ibata, J. Stuart B. Wyithe
|
Searching for MACHOs in Galaxy Clusters
|
8 pages, 2 figures, to appear in the Astrophysical Journal Letters
| null |
10.1086/312916
|
GFL-001
|
astro-ph
| null |
If cluster dark matter is in the form of compact objects it will introduce
fluctuations into the light curves of distant sources. Current searches for
MACHOs in clusters of galaxies focus on monitoring quasars behind nearby
systems. This paper considers the effect of such a compact population on the
surface brightness distribution of giant gravitationally lensed arcs. As the
microlensing optical depth is significant in these clusters, the expected
fluctuations are substantial and are observable. Focusing on the giant arc seen
in Abell 370, we demonstrate that several `extreme' events would be visible in
a comparison of HST observations at two epochs. Utilizing NGST, long term
monitoring should reveal a ubiquitous twinkling of brightness over the surface
of the arcs.
|
[{'version': 'v1', 'created': 'Thu, 10 Aug 2000 00:16:12 GMT'}]
|
2009-10-31
|
[array(['Lewis', 'Geraint F.', ''], dtype=object)
array(['Ibata', 'Rodrigo A.', ''], dtype=object)
array(['Wyithe', 'J. Stuart B.', ''], dtype=object)]
|
2,486 |
1405.7743
|
Salvatore Savo
|
Salvatore Savo, You Zhou, Giuseppe Castaldi, Massimo Moccia, Vincenzo
Galdi, Shriram Ramanathan, Yuki Sato
|
Reconfigurable anisotropy and functional transformations with
VO$_{2}$-based metamaterial electric circuits
| null | null |
10.1103/PhysRevB.91.134105
| null |
physics.optics cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We demonstrate an innovative multifunctional artificial material that
combines exotic metamaterial properties and the environmentally responsive
nature of phase change media. The tunable metamaterial is designed with the aid
of two interwoven coordinate-transformation equations and implemented with a
network of thin film resistors and vanadium dioxide ($VO_{2}$). The strong
temperature dependence of $VO_{2}$ electrical conductivity results in a
relevant modification of the resistor network behavior, and we provide
experimental evidence for a reconfigurable metamaterial electric circuit (MMEC)
that not only mimics a continuous medium but is also capable of responding to
thermal stimulation through dynamic variation of its spatial anisotropy. Upon
external temperature change the overall effective functionality of the material
switches between a "truncated-cloak" and "concentrator" for electric currents.
Possible applications may include adaptive matching resistor networks,
multifunctional electronic devices, and equivalent artificial materials in the
magnetic domain. Additionally, the proposed technology could also be relevant
for thermal management of integrated circuits
|
[{'version': 'v1', 'created': 'Thu, 29 May 2014 22:54:27 GMT'}]
|
2015-06-19
|
[array(['Savo', 'Salvatore', ''], dtype=object)
array(['Zhou', 'You', ''], dtype=object)
array(['Castaldi', 'Giuseppe', ''], dtype=object)
array(['Moccia', 'Massimo', ''], dtype=object)
array(['Galdi', 'Vincenzo', ''], dtype=object)
array(['Ramanathan', 'Shriram', ''], dtype=object)
array(['Sato', 'Yuki', ''], dtype=object)]
|
2,487 |
1005.4676
|
Satoshi Ohya
|
Satoshi Ohya, Makoto Sakamoto, Motoi Tachibana
|
Running Boundary Condition
|
PTPTeX, 21 pages, 8 eps figures; typos corrected, references and an
appendix added
|
Prog.Theor.Phys.125:225-245,2011
|
10.1143/PTP.125.225
|
IFUP-TH/2010-16, KOBE-TH-10-02, SAGA-HE-261
|
hep-th math-ph math.MP quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we argue that boundary condition may run with energy scale. As
an illustrative example, we consider one-dimensional quantum mechanics for a
spinless particle that freely propagates in the bulk yet interacts only at the
origin. In this setting we find the renormalization group flow of U(2) family
of boundary conditions exactly. We show that the well-known scale-independent
subfamily of boundary conditions are realized as fixed points. We also discuss
the duality between two distinct boundary conditions from the renormalization
group point of view. Generalizations to conformal mechanics and quantum graph
are also discussed.
|
[{'version': 'v1', 'created': 'Tue, 25 May 2010 20:00:00 GMT'}
{'version': 'v2', 'created': 'Mon, 28 Jan 2013 00:34:57 GMT'}]
|
2013-01-29
|
[array(['Ohya', 'Satoshi', ''], dtype=object)
array(['Sakamoto', 'Makoto', ''], dtype=object)
array(['Tachibana', 'Motoi', ''], dtype=object)]
|
2,488 |
1912.12962
|
Vladimir Kanovei
|
Vladimir Kanovei and Vassily Lyubetsky
|
Indiscernible pairs of countable sets of reals at a given projective
level
| null | null | null | null |
math.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using an invariant modification of Jensen's "minimal $\varPi^1_2$ singleton"
forcing, we define a model of ZFC, in which, for a given $n\ge2$, there exists
a lightface $\varPi^1_n$ unordered pair of non-OD (hence, OD-indiscernible)
countable sets of reals, but there is no $\varSigma^1_n$ unordered pairs of
this kind.
|
[{'version': 'v1', 'created': 'Mon, 30 Dec 2019 15:20:56 GMT'}]
|
2020-01-01
|
[array(['Kanovei', 'Vladimir', ''], dtype=object)
array(['Lyubetsky', 'Vassily', ''], dtype=object)]
|
2,489 |
1711.10203
|
Dieuwke Hupkes
|
Dieuwke Hupkes, Sara Veldhoen, Willem Zuidema
|
Visualisation and 'diagnostic classifiers' reveal how recurrent and
recursive neural networks process hierarchical structure
|
20 pages
|
Journal of Artificial Intelligence Research 61 (2018) 907-926
| null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate how neural networks can learn and process languages with
hierarchical, compositional semantics. To this end, we define the artificial
task of processing nested arithmetic expressions, and study whether different
types of neural networks can learn to compute their meaning. We find that
recursive neural networks can find a generalising solution to this problem, and
we visualise this solution by breaking it up in three steps: project, sum and
squash. As a next step, we investigate recurrent neural networks, and show that
a gated recurrent unit, that processes its input incrementally, also performs
very well on this task. To develop an understanding of what the recurrent
network encodes, visualisation techniques alone do not suffice. Therefore, we
develop an approach where we formulate and test multiple hypotheses on the
information encoded and processed by the network. For each hypothesis, we
derive predictions about features of the hidden state representations at each
time step, and train 'diagnostic classifiers' to test those predictions. Our
results indicate that the networks follow a strategy similar to our
hypothesised 'cumulative strategy', which explains the high accuracy of the
network on novel expressions, the generalisation to longer expressions than
seen in training, and the mild deterioration with increasing length. This is
turn shows that diagnostic classifiers can be a useful technique for opening up
the black box of neural networks. We argue that diagnostic classification,
unlike most visualisation techniques, does scale up from small networks in a
toy domain, to larger and deeper recurrent networks dealing with real-life
data, and may therefore contribute to a better understanding of the internal
dynamics of current state-of-the-art models in natural language processing.
|
[{'version': 'v1', 'created': 'Tue, 28 Nov 2017 09:41:34 GMT'}
{'version': 'v2', 'created': 'Fri, 20 Apr 2018 09:01:41 GMT'}]
|
2018-04-23
|
[array(['Hupkes', 'Dieuwke', ''], dtype=object)
array(['Veldhoen', 'Sara', ''], dtype=object)
array(['Zuidema', 'Willem', ''], dtype=object)]
|
2,490 |
2101.09452
|
Jian Chen
|
Jian Chen, Chenhao Wan, Andy Chong and Qiwen Zhan
|
Experimental demonstration of cylindrical vector spatiotemporal optical
vortex
|
5 pages, 5 figures
| null | null | null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We experimentally generate cylindrically polarized wavepackets with
transverse orbital angular momentum, demonstrating the coexistence of
spatiotemporal optical vortex with spatial polarization singularity. The
results in this paper extend the study of spatiotemporal wavepackets to a
broader scope, paving the way for its applications in various areas such as
light-matter interaction, optical tweezers, spatiotemporal spin-orbit angular
momentum coupling, etc.
|
[{'version': 'v1', 'created': 'Sat, 23 Jan 2021 07:56:20 GMT'}]
|
2021-01-26
|
[array(['Chen', 'Jian', ''], dtype=object)
array(['Wan', 'Chenhao', ''], dtype=object)
array(['Chong', 'Andy', ''], dtype=object)
array(['Zhan', 'Qiwen', ''], dtype=object)]
|
2,491 |
2109.11670
|
Duncan V. Mifsud
|
P\'eter Herczku, Duncan V. Mifsud, Sergio Ioppolo, Zolt\'an Juh\'asz,
Zuzana Kanuchov\'a, S\'andor T. S. Kov\'acs, Alejandra Traspas Muina, Perry
A. Hailey, Istv\'an Rajta, Istv\'an Vajda, Nigel J. Mason, Robert W.
McCullough, B\'ela Parip\'as, B\'ela Sulik
|
The Ice Chamber for Astrophysics-Astrochemistry (ICA): A New
Experimental Facility for Ion Impact Studies of Astrophysical Ice Analogues
|
Published in Review of Scientific Instruments
|
Rev. Sci. Instrum. (2021) 92, 084501
|
10.1063/5.0050930
| null |
astro-ph.IM astro-ph.GA
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
The Ice Chamber for Astrophysics-Astrochemistry (ICA) is a new laboratory
end-station located at the Institute for Nuclear Research (Atomki) in Debrecen,
Hungary. The ICA has been specifically designed for the study of the
physico-chemical properties of astrophysical ice analogues and their chemical
evolution when subjected to ionising radiation and thermal processing. The ICA
is an ultra-high vacuum compatible chamber containing a series of
IR-transparent substrates mounted in a copper holder connected to a
closed-cycle cryostat capable of being cooled down to 20 K, itself mounted on a
360{\deg} rotation stage and a z-linear manipulator. Ices are deposited onto
the substrates via background deposition of dosed gases. Ice structure and
chemical composition are monitored by means of FTIR absorbance spectroscopy in
transmission mode, although use of reflectance mode is possible by using
metallic substrates. Pre-prepared ices may be processed in a variety of ways. A
2 MV Tandetron accelerator is capable of delivering a wide variety of
high-energy ions into the ICA, which simulates ice processing by cosmic rays,
the solar wind, or magnetospheric ions. The ICA is also equipped with an
electron gun which may be used for electron impact radiolysis of ices. Thermal
processing of both deposited and processed ices may be monitored by means of
both FTIR spectroscopy and quadrupole mass spectrometry. In this paper, we
provide a detailed description of the ICA set-up, as well as an overview of
preliminary results obtained and future plans.
|
[{'version': 'v1', 'created': 'Thu, 23 Sep 2021 22:26:00 GMT'}]
|
2021-09-27
|
[array(['Herczku', 'Péter', ''], dtype=object)
array(['Mifsud', 'Duncan V.', ''], dtype=object)
array(['Ioppolo', 'Sergio', ''], dtype=object)
array(['Juhász', 'Zoltán', ''], dtype=object)
array(['Kanuchová', 'Zuzana', ''], dtype=object)
array(['Kovács', 'Sándor T. S.', ''], dtype=object)
array(['Muina', 'Alejandra Traspas', ''], dtype=object)
array(['Hailey', 'Perry A.', ''], dtype=object)
array(['Rajta', 'István', ''], dtype=object)
array(['Vajda', 'István', ''], dtype=object)
array(['Mason', 'Nigel J.', ''], dtype=object)
array(['McCullough', 'Robert W.', ''], dtype=object)
array(['Paripás', 'Béla', ''], dtype=object)
array(['Sulik', 'Béla', ''], dtype=object)]
|
2,492 |
nucl-th/9310005
|
Wally Melnitchouk
|
W.Melnitchouk (U.Regensburg) and A.W.Thomas (U.Adelaide)
|
Nuclear Shadowing at Small x and Q^2
|
ADP-93-214/T132 (August 1993), accepted for publ. in Phys.Lett.B.
typeset using REVTeX, 12 pages, 4 uuencoded figures
|
Phys.Lett.B317:437-442,1993
|
10.1016/0370-2693(93)91021-E
| null |
nucl-th hep-ph
| null |
Shadowing corrections to structure functions of heavy nuclei are calculated
at very low values of Bjorken-$x$ and at values of the momentum transfer
relevant to recent experiments. Good agreement is obtained with data from the
E665 Collaboration for Xe/D and Pb/D, and with the NMC data on Ca/D and C/D
structure function ratios. Corrections to the deuteron structure function are
also estimated down to $x \sim 10^{-5}$, and found to be less than about $3\%$
over the range of $x$ covered by the E665 data.
|
[{'version': 'v1', 'created': 'Tue, 5 Oct 1993 14:01:41 GMT'}
{'version': 'v2', 'created': 'Wed, 6 Oct 1993 09:47:38 GMT'}]
|
2008-11-26
|
[array(['Melnitchouk', 'W.', '', 'U.Regensburg'], dtype=object)
array(['Thomas', 'A. W.', '', 'U.Adelaide'], dtype=object)]
|
2,493 |
hep-ph/9808401
|
Tony Gherghetta
|
T.Gherghetta, G.F.Giudice and A.Riotto
|
Nucleosynthesis Bounds in Gauge-Mediated Supersymmetry Breaking Theories
|
13 pages, 4 figures, LaTeX
|
Phys.Lett. B446 (1999) 28-36
|
10.1016/S0370-2693(98)01527-5
|
CERN-TH/98-271
|
hep-ph astro-ph
| null |
In gauge-mediated supersymmetry breaking theories the next-to-lightest
supersymmetric particle can decay during or after the nucleosynthesis epoch.
The decay products such as photons and hadrons can destroy the light element
abundances. Restricting the damage that these decays can do leads to
constraints on the abundance and lifetime of the NLSP. We compute the freezeout
abundance of the NLSP by including all coannhilation thresholds which are
particularly important in the case in which the NLSP is the lightest stau. We
find that the upper bound on the messenger scale can be as stringent as 10^12
GeV when the NLSP is the lightest neutralino and 10^13 GeV when the NLSP is the
lightest stau. Our findings disfavour models of gauge mediation where the
messenger scale is close to the GUT scale or results from balancing
renormalisable interactions with non-renormalisable operators at the Planck
scale. When combined with the requirement of no gravitino overabundance, our
bound implies that the reheating temperature after inflation must be less than
10^7 GeV.
|
[{'version': 'v1', 'created': 'Mon, 24 Aug 1998 17:41:22 GMT'}]
|
2015-06-25
|
[array(['Gherghetta', 'T.', ''], dtype=object)
array(['Giudice', 'G. F.', ''], dtype=object)
array(['Riotto', 'A.', ''], dtype=object)]
|
2,494 |
0912.0933
|
Jonathan Swift
|
Jonathan J. Swift and Christopher N. Beaumont
|
Discerning the Form of the Dense Core Mass Function
|
6 pages, 2 figures, accepted for publication in PASP
| null |
10.1086/650398
| null |
astro-ph.GA astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the ability to discern between lognormal and powerlaw forms
for the observed mass function of dense cores in star forming regions. After
testing our fitting, goodness-of-fit, and model selection procedures on
simulated data, we apply our analysis to 14 datasets from the literature.
Whether the core mass function has a powerlaw tail or whether it follows a pure
lognormal form cannot be distinguished from current data. From our simulations
it is estimated that datasets from uniform surveys containing more than
approximately 500 cores with a completeness limit below the peak of the mass
distribution are needed to definitively discern between these two functional
forms. We also conclude that the width of the core mass function may be more
reliably estimated than the powerlaw index of the high mass tail and that the
width may also be a more useful parameter in comparing with the stellar initial
mass function to deduce the statistical evolution of dense cores into stars.
|
[{'version': 'v1', 'created': 'Fri, 4 Dec 2009 20:38:28 GMT'}]
|
2015-05-14
|
[array(['Swift', 'Jonathan J.', ''], dtype=object)
array(['Beaumont', 'Christopher N.', ''], dtype=object)]
|
2,495 |
quant-ph/0105141
|
Maxim Raginsky
|
Maxim Raginsky
|
Strictly contractive quantum channels and physically realizable quantum
computers
|
14 pages; revtex, amsfonts, amssymb; made some changes (recommended
by Phys. Rev. A), updated the references
|
Phys. Rev. A 65, 032306 (2002)
|
10.1103/PhysRevA.65.032306
| null |
quant-ph
| null |
We study the robustness of quantum computers under the influence of errors
modelled by strictly contractive channels. A channel $T$ is defined to be
strictly contractive if, for any pair of density operators $\rho,\sigma$ in its
domain, $\| T\rho - T\sigma \|_1 \le k \| \rho-\sigma \|_1$ for some $0 \le k <
1$ (here $\| \cdot \|_1$ denotes the trace norm). In other words, strictly
contractive channels render the states of the computer less distinguishable in
the sense of quantum detection theory. Starting from the premise that all
experimental procedures can be carried out with finite precision, we argue that
there exists a physically meaningful connection between strictly contractive
channels and errors in physically realizable quantum computers. We show that,
in the absence of error correction, sensitivity of quantum memories and
computers to strictly contractive errors grows exponentially with storage time
and computation time respectively, and depends only on the constant $k$ and the
measurement precision. We prove that strict contractivity rules out the
possibility of perfect error correction, and give an argument that approximate
error correction, which covers previous work on fault-tolerant quantum
computation as a special case, is possible.
|
[{'version': 'v1', 'created': 'Tue, 29 May 2001 22:23:52 GMT'}
{'version': 'v2', 'created': 'Wed, 13 Jun 2001 18:48:13 GMT'}
{'version': 'v3', 'created': 'Wed, 17 Oct 2001 01:22:55 GMT'}]
|
2007-05-23
|
[array(['Raginsky', 'Maxim', ''], dtype=object)]
|
2,496 |
1309.7805
|
Michael Uleysky
|
D. V. Makarov, M. Yu. Uleysky and S. V. Prants
|
Control of atomic transport using autoresonance
| null |
Chaos, Complexity and Transport, (eds. X. Leoncini, M. Leonetti)
World Scientific, 2012, pp. 24-32
| null | null |
nlin.CD cond-mat.quant-gas quant-ph
|
http://creativecommons.org/licenses/by-nc-sa/3.0/
|
Dynamics of an atomic wavepacket in an optical superlattice is considered. We
propose a simple scheme of wavepacket localization near the minima of the
optical potential. In our approach, a wavelike perturbation caused by an
additional lattice induces classical resonance which traps an atomic cloud.
Adiabatic phase modulation of the perturbation slowly shifts resonance zone in
phase space to the range of lower energies, retaining trapped atoms inside.
This phenomenon is a kind of autoresonance. Quantum computations agree well
with classical modelling.
|
[{'version': 'v1', 'created': 'Mon, 30 Sep 2013 11:58:40 GMT'}]
|
2013-10-02
|
[array(['Makarov', 'D. V.', ''], dtype=object)
array(['Uleysky', 'M. Yu.', ''], dtype=object)
array(['Prants', 'S. V.', ''], dtype=object)]
|
2,497 |
2210.06570
|
Yuekun Dai
|
Yuekun Dai, Chongyi Li, Shangchen Zhou, Ruicheng Feng, Chen Change Loy
|
Flare7K: A Phenomenological Nighttime Flare Removal Dataset
|
Camera-ready version for NeurIPS 2022 Track Datasets and Benchmarks
| null | null | null |
cs.CV eess.IV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Artificial lights commonly leave strong lens flare artifacts on images
captured at night. Nighttime flare not only affects the visual quality but also
degrades the performance of vision algorithms. Existing flare removal methods
mainly focus on removing daytime flares and fail in nighttime. Nighttime flare
removal is challenging because of the unique luminance and spectrum of
artificial lights and the diverse patterns and image degradation of the flares
captured at night. The scarcity of nighttime flare removal datasets limits the
research on this crucial task. In this paper, we introduce, Flare7K, the first
nighttime flare removal dataset, which is generated based on the observation
and statistics of real-world nighttime lens flares. It offers 5,000 scattering
and 2,000 reflective flare images, consisting of 25 types of scattering flares
and 10 types of reflective flares. The 7,000 flare patterns can be randomly
added to flare-free images, forming the flare-corrupted and flare-free image
pairs. With the paired data, we can train deep models to restore
flare-corrupted images taken in the real world effectively. Apart from abundant
flare patterns, we also provide rich annotations, including the labeling of
light source, glare with shimmer, reflective flare, and streak, which are
commonly absent from existing datasets. Hence, our dataset can facilitate new
work in nighttime flare removal and more fine-grained analysis of flare
patterns. Extensive experiments show that our dataset adds diversity to
existing flare datasets and pushes the frontier of nighttime flare removal.
|
[{'version': 'v1', 'created': 'Wed, 12 Oct 2022 20:17:24 GMT'}]
|
2022-10-18
|
[array(['Dai', 'Yuekun', ''], dtype=object)
array(['Li', 'Chongyi', ''], dtype=object)
array(['Zhou', 'Shangchen', ''], dtype=object)
array(['Feng', 'Ruicheng', ''], dtype=object)
array(['Loy', 'Chen Change', ''], dtype=object)]
|
2,498 |
astro-ph/0404582
|
Lucien Kuiper
|
L. Kuiper (1), W. Hermsen (1,2) and M. Mendez (1,2) ((1) SRON-Utrecht,
The Netherlands, (2) Astronomical Institute "Anton Pannekoek", Amsterdam, The
Netherlands)
|
Discovery of hard non-thermal pulsed X-ray emission from the anomalous
X-ray pulsar 1E 1841-045
|
14 pages in ApJ preprint style, 5 figures one in color, Submitted to
ApJ
|
Astrophys.J. 613 (2004) 1173-1178
|
10.1086/423129
| null |
astro-ph
| null |
We report the discovery of non-thermal pulsed X-ray/soft gamma-ray emission
up to about 150 keV from the anomalous X-ray pulsar AXP 1E 1841-045 located
near the centre of supernova remnant Kes 73 using RXTE PCA and HEXTE data. The
morphology of the double-peaked pulse profile changes rapidly with energy from
2 keV up to about 8 keV, above which the pulse shape remains more or less
stable. The pulsed spectrum is very hard, its shape above 10 keV can be
described well by a power law with a photon index of 0.94 +/- 0.16. 1E 1841-045
is the first AXP for which such very-hard pulsed emission has been detected,
which points to an origin in the magnetosphere of a magnetar.
|
[{'version': 'v1', 'created': 'Thu, 29 Apr 2004 16:37:41 GMT'}]
|
2009-11-10
|
[array(['Kuiper', 'L.', ''], dtype=object)
array(['Hermsen', 'W.', ''], dtype=object)
array(['Mendez', 'M.', ''], dtype=object)]
|
2,499 |
2303.07678
|
Liang Wang
|
Liang Wang, Nan Yang, Furu Wei
|
Query2doc: Query Expansion with Large Language Models
|
9 pages
| null | null | null |
cs.IR cs.CL
|
http://creativecommons.org/licenses/by/4.0/
|
This paper introduces a simple yet effective query expansion approach,
denoted as query2doc, to improve both sparse and dense retrieval systems. The
proposed method first generates pseudo-documents by few-shot prompting large
language models (LLMs), and then expands the query with generated
pseudo-documents. LLMs are trained on web-scale text corpora and are adept at
knowledge memorization. The pseudo-documents from LLMs often contain highly
relevant information that can aid in query disambiguation and guide the
retrievers. Experimental results demonstrate that query2doc boosts the
performance of BM25 by 3% to 15% on ad-hoc IR datasets, such as MS-MARCO and
TREC DL, without any model fine-tuning. Furthermore, our method also benefits
state-of-the-art dense retrievers in terms of both in-domain and out-of-domain
results.
|
[{'version': 'v1', 'created': 'Tue, 14 Mar 2023 07:27:30 GMT'}]
|
2023-03-15
|
[array(['Wang', 'Liang', ''], dtype=object)
array(['Yang', 'Nan', ''], dtype=object)
array(['Wei', 'Furu', ''], dtype=object)]
|
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