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44.4k
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3,200 |
1302.3375
|
Yasuomi Kamiya
|
Yasuomi Kamiya
|
Light Curve Models for SN 2009dc
|
2 pages, 1 figure, published in the Proceedings of the IAU Symposium
No. 281 "Binary Paths to Type Ia Supernova Explosions" held in Padova (July
4-8, 2011)
|
Proceedings of IAU Symposium No. 281 "Binary Paths to Type Ia
Supernova Explosions" (2013), eds. R. Di Stefano, M. Orio, and M. More
(Cambridge University Press), pp. 314-315
|
10.1017/S1743921312015268
| null |
astro-ph.HE astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Simplified explosion models of super-Chandrasekhar-mass C-O white dwarfs
(WDs) are constructed with parameters such as WD mass and Ni-56 mass. Their
light curves are obtained by solving one-dimensional equations of radiation
hydrodynamics, and compared with the observations of SN 2009dc, one of the
overluminous Type Ia supernovae, to estimate its properties. As a result, the
progenitor of SN 2009dc is suggested to be a 2.2- to 2.4-solar-mass C-O WD with
1.2 to 1.4 solar masses of Ni-56, if the extinction by its host galaxy is
negligible.
|
[{'version': 'v1', 'created': 'Thu, 14 Feb 2013 11:33:20 GMT'}]
|
2013-02-15
|
[array(['Kamiya', 'Yasuomi', ''], dtype=object)]
|
3,201 |
1308.0276
|
Aram Saharian
|
S. Bellucci, A. A. Saharian
|
Electromagnetic two-point functions and the Casimir effect in
Friedmann-Robertson-Walker cosmologies
|
25 pages, 4 figures
|
Phys. Rev. D 88 (2013) 064034
|
10.1103/PhysRevD.88.064034
| null |
hep-th astro-ph.CO gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We evaluate the two-point functions of the electromagnetic field in (D+1)
-dimensional spatially flat Friedmann-Robertson-Walker universes with a
power-law scale factor, assuming that the field is prepared in the Bunch-Davies
vacuum state. The range of powers are specified in which the two-point
functions are infrared convergent and the Bunch-Davies vacuum for the
electromagnetic field is a physically realizable state. The two-point functions
are applied for the investigation of the vacuum expectation values of the field
squared and the energy-momentum tensor, induced by a single and two parallel
conducting plates. Unlike to the case of conducting plates in the Minkowski
bulk, in the problem under consideration the stresses along the directions
parallel to the plates are not equal to the energy density. We show that, in
addition to the diagonal components, the vacuum energy-momentum tensor has a
nonzero off-diagonal component which describes energy flux along the direction
normal to the plates. For a single plate this flux is directed from the plate.
The Casimir forces are investigated in the geometry of two plates. At
separations between the plates smaller than the curvature radius of the
background spacetime, to the leading order, we recover the corresponding result
in the Minkowski spacetime and in this case the forces are attractive. At
larger separations, the influence of the curvature on the Casimir forces is
essential with different asymptotic behavior for decelerated and accelerated
expansions. In particular, for the latter case there is a range of powers of
the expansion law in which the forces become repulsive at large separations
between the plates.
|
[{'version': 'v1', 'created': 'Thu, 1 Aug 2013 17:36:33 GMT'}]
|
2013-11-15
|
[array(['Bellucci', 'S.', ''], dtype=object)
array(['Saharian', 'A. A.', ''], dtype=object)]
|
3,202 |
q-alg/9508011
|
Hidetoshi Awata
|
H. Awata, H. Kubo, S. Odake and J. Shiraishi
|
Quantum $W_N$ Algebras and Macdonald Polynomials
|
LaTeX file, 17-pages, no-figures, a reference added
|
Commun. Math. Phys. 179 (1996) 401
|
10.1007/BF02102595
|
YITP/U-95-34, DPSU-95-9, UT-718
|
q-alg hep-th math.QA
| null |
We derive a quantum deformation of the $W_N$ algebra and its quantum Miura
transformation, whose singular vectors realize the Macdonald polynomials.
|
[{'version': 'v1', 'created': 'Mon, 21 Aug 1995 16:07:03 GMT'}
{'version': 'v2', 'created': 'Thu, 31 Aug 1995 17:04:45 GMT'}
{'version': 'v3', 'created': 'Mon, 4 Sep 1995 16:30:04 GMT'}
{'version': 'v4', 'created': 'Sat, 23 Sep 1995 13:39:11 GMT'}]
|
2009-10-28
|
[array(['Awata', 'H.', ''], dtype=object)
array(['Kubo', 'H.', ''], dtype=object)
array(['Odake', 'S.', ''], dtype=object)
array(['Shiraishi', 'J.', ''], dtype=object)]
|
3,203 |
1401.0012
|
Melvyn B. Nathanson
|
Melvyn B. Nathanson
|
A forest of linear fractional transformations
|
22 pages
|
International Journal of Number Theory 11 (2015), 1275--1299
| null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Calkin-Wilf tree is an infinite binary tree whose vertices are the
positive rational numbers. Each number occurs in the tree exactly once and in
the form $a/b$, where are $a$ and $b$ are relatively prime positive integers.
For every $2\times 2$ matrix with nonnegative integral coordinates and nonzero
determinant, it is possible to construct an analogous tree with this root. If
the root is the identity matrix, then the tree consists all matrices with
determinant 1, and this tree possesses the basic properties of the Calkin-Wilf
tree of positive rational numbers. The set of all matrices with nonzero
determinant decomposes into a forest of rooted infinite binary trees.
|
[{'version': 'v1', 'created': 'Mon, 30 Dec 2013 21:00:08 GMT'}
{'version': 'v2', 'created': 'Fri, 3 Jan 2014 12:12:53 GMT'}
{'version': 'v3', 'created': 'Wed, 4 Jun 2014 13:34:35 GMT'}]
|
2020-04-22
|
[array(['Nathanson', 'Melvyn B.', ''], dtype=object)]
|
3,204 |
1106.2134
|
Vincenzo Nicosia
|
V. Nicosia, J. Tang, M. Musolesi, G. Russo, C. Mascolo and V. Latora
|
Components in time-varying graphs
|
12 pages, 4 figures, 3 tables
|
Chaos, 22, 023101 (2012)
|
10.1063/1.3697996
| null |
physics.soc-ph cond-mat.stat-mech cs.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Real complex systems are inherently time-varying. Thanks to new communication
systems and novel technologies, it is today possible to produce and analyze
social and biological networks with detailed information on the time of
occurrence and duration of each link. However, standard graph metrics
introduced so far in complex network theory are mainly suited for static
graphs, i.e., graphs in which the links do not change over time, or graphs
built from time-varying systems by aggregating all the links as if they were
concurrent in time. In this paper, we extend the notion of connectedness, and
the definitions of node and graph components, to the case of time-varying
graphs, which are represented as time-ordered sequences of graphs defined over
a fixed set of nodes. We show that the problem of finding strongly connected
components in a time-varying graph can be mapped into the problem of
discovering the maximal-cliques in an opportunely constructed static graph,
which we name the affine graph. It is therefore an NP-complete problem. As a
practical example, we have performed a temporal component analysis of
time-varying graphs constructed from three data sets of human interactions. The
results show that taking time into account in the definition of graph
components allows to capture important features of real systems. In particular,
we observe a large variability in the size of node temporal in- and
out-components. This is due to intrinsic fluctuations in the activity patterns
of individuals, which cannot be detected by static graph analysis.
|
[{'version': 'v1', 'created': 'Fri, 10 Jun 2011 18:05:09 GMT'}
{'version': 'v2', 'created': 'Sun, 19 Jun 2011 18:20:27 GMT'}
{'version': 'v3', 'created': 'Mon, 16 Apr 2012 13:36:04 GMT'}]
|
2012-04-17
|
[array(['Nicosia', 'V.', ''], dtype=object)
array(['Tang', 'J.', ''], dtype=object)
array(['Musolesi', 'M.', ''], dtype=object)
array(['Russo', 'G.', ''], dtype=object)
array(['Mascolo', 'C.', ''], dtype=object)
array(['Latora', 'V.', ''], dtype=object)]
|
3,205 |
2207.00431
|
Nicolas Brieu
|
Nicolas Brieu, Felix J. Segerer, Ansh Kapil, Philipp Wortmann, Guenter
Schmidt
|
Stain Isolation-based Guidance for Improved Stain Translation
|
Short Paper - MIDL2022 (Medical Imaging with Deep Learning)
| null | null | null |
cs.CV cs.LG eess.IV
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Unsupervised and unpaired domain translation using generative adversarial
neural networks, and more precisely CycleGAN, is state of the art for the stain
translation of histopathology images. It often, however, suffers from the
presence of cycle-consistent but non structure-preserving errors. We propose an
alternative approach to the set of methods which, relying on segmentation
consistency, enable the preservation of pathology structures. Focusing on
immunohistochemistry (IHC) and multiplexed immunofluorescence (mIF), we
introduce a simple yet effective guidance scheme as a loss function that
leverages the consistency of stain translation with stain isolation.
Qualitative and quantitative experiments show the ability of the proposed
approach to improve translation between the two domains.
|
[{'version': 'v1', 'created': 'Tue, 28 Jun 2022 13:33:48 GMT'}]
|
2022-07-04
|
[array(['Brieu', 'Nicolas', ''], dtype=object)
array(['Segerer', 'Felix J.', ''], dtype=object)
array(['Kapil', 'Ansh', ''], dtype=object)
array(['Wortmann', 'Philipp', ''], dtype=object)
array(['Schmidt', 'Guenter', ''], dtype=object)]
|
3,206 |
hep-ph/0410210
|
Roberto Bonciani
|
R. Bonciani
|
Analytical Calculation of Two-Loop Feynman Diagrams
|
Talk presented at the final meeting of the European Network ``Physics
at Colliders'', Montpellier, September 26-27 2004. 15 pages, 2 figures
|
Acta Phys.Polon. B35 (2004) 2587-2600
| null | null |
hep-ph
| null |
We review the Laporta algorithm for the reduction of scalar integrals to the
master integrals and the differential equations technique for their evaluation.
We discuss the use of the basis of harmonic polylogarithms for the analytical
expression of the results and some generalization of this basis to wider sets
of transcendental functions.
|
[{'version': 'v1', 'created': 'Thu, 14 Oct 2004 15:31:10 GMT'}]
|
2007-05-23
|
[array(['Bonciani', 'R.', ''], dtype=object)]
|
3,207 |
1306.0633
|
Feng Wang
|
Narges Mohammadi, Feng Wang, Stephen Best, Dominique Appadoo and
Christopher T. Chantler
|
Dominance of eclipsed ferrocene conformer in solutions revealed by the
IR fingerprint spectral splitting
|
22 pages, 3 tables and 6 figures
| null | null | null |
physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A combined high-resolution Fourier transform infrared (FTIR) spectra of
ferrocene (Fc) and density functional theory (DFT) based quantum mechanical
calculations confirmed the dominance of the eclipsed Fc conformer in the
fingerprint region of 400-500 cm-1. The IR spectra of Fc were measured in
solutions with a number of non-polar solvents such as acetonitrile,
dichloromethane, tetrahydrofuran and dioxane. The measurements agree well with
the earlier IR spectra of Lippincott and Nelson (1958) as well as the most
recent IR spectral measurement in dichloromethane solution of Duhovic and
Diaconescu (2013). All experimental measurements in the solutions unambiguously
exhibit an IR spectral splitting of ca. 15 cm-1 in the 480-500 cm-1 region. The
DFT based B3LYP/m6-31G(d) quantum mechanical calculations using implicit
solvent models in this study indicates that only the ground electronic state of
the eclipsed (D5h) Fc splits in the IR fingerprint region of ca. 500 cm-1. The
IR spectral splitting characterises the centre Fe metal related vibrations of
the eclipsed Fc, in agreement with our previous finding in gas phase [Mohammadi
et al, 2012]. The present study further suggests that the effects of solvents
on the IR spectra of Fc in this region are small and the solvent model effects
are also small but the solute molecular density (SMD) model seems to produce
the most accurate IR spectrum in the region of 400-600 cm-1 of Fc without
scaling the calculated results.
|
[{'version': 'v1', 'created': 'Tue, 4 Jun 2013 01:54:25 GMT'}]
|
2013-06-05
|
[array(['Mohammadi', 'Narges', ''], dtype=object)
array(['Wang', 'Feng', ''], dtype=object)
array(['Best', 'Stephen', ''], dtype=object)
array(['Appadoo', 'Dominique', ''], dtype=object)
array(['Chantler', 'Christopher T.', ''], dtype=object)]
|
3,208 |
hep-ph/0306292
|
Zhenjun Xiao
|
Zhenjun Xiao, and Libo Guo
|
Charmless hadronic decays $B \to VV$ in the Topcolor-assisted
Technicolor model
|
16 pages, Revtex, 4 EPS figures
|
Commun.Theor.Phys. 40 (2003) 77-84
|
10.1088/0253-6102/40/1/77
| null |
hep-ph
| null |
Based on the effective Hamiltonian with the generalized factorization
approach, we calculate the branching ratios and CP asymmetries of $B \to VV$
decays in the Topcolor-assisted Technicolor (TC2) model. Within the considered
parameter space we find that: (a) for the penguin-dominated $B \to K^{*+}\phi$
and $K^{*0}\phi$ decays, the new physics enhancements to the branching ratios
are around 40%; (b) the measured branching ratios of $B \to K^{*+} \phi$ and $
K^{*0} \phi$ decays prefer the range of $3 \lesssim \nceff \lesssim 5$; (c) the
SM and TC2 model predictions for the branching ratio ${\cal B}(B^+ \to \rho^+
\rho^0)$ are only about half of the Belle's measurement; and (d) for most $B
\to VV$ decays, the new physics corrections on their CP asymmetries are
generally small or moderate in magnitude and insensitive to the variation of
$\mpcc$ and $\nceff$.
|
[{'version': 'v1', 'created': 'Mon, 30 Jun 2003 02:51:52 GMT'}]
|
2018-01-17
|
[array(['Xiao', 'Zhenjun', ''], dtype=object)
array(['Guo', 'Libo', ''], dtype=object)]
|
3,209 |
2005.02819
|
Max Kochurov
|
Max Kochurov, Rasul Karimov, Serge Kozlukov
|
Geoopt: Riemannian Optimization in PyTorch
|
Proceedings of the 37th International Conference on Machine Learning,
Vienna, Austria, PMLR 108, 2020, GRLB Workshop
| null | null | null |
cs.CG cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Geoopt is a research-oriented modular open-source package for Riemannian
Optimization in PyTorch. The core of Geoopt is a standard Manifold interface
that allows for the generic implementation of optimization algorithms. Geoopt
supports basic Riemannian SGD as well as adaptive optimization algorithms.
Geoopt also provides several algorithms and arithmetic methods for supported
manifolds, which allow composing geometry-aware neural network layers that can
be integrated with existing models.
|
[{'version': 'v1', 'created': 'Wed, 6 May 2020 13:39:30 GMT'}
{'version': 'v2', 'created': 'Tue, 12 May 2020 18:35:09 GMT'}
{'version': 'v3', 'created': 'Sat, 4 Jul 2020 00:19:43 GMT'}
{'version': 'v4', 'created': 'Thu, 9 Jul 2020 06:55:00 GMT'}
{'version': 'v5', 'created': 'Fri, 17 Jul 2020 16:42:53 GMT'}]
|
2020-07-20
|
[array(['Kochurov', 'Max', ''], dtype=object)
array(['Karimov', 'Rasul', ''], dtype=object)
array(['Kozlukov', 'Serge', ''], dtype=object)]
|
3,210 |
2111.02924
|
Valerio D'Andrea
|
V. D'Andrea, R. Biondi, C. Ferrari, A.D. Ferella, J. Mahlstedt, G.
Pieramico
|
The ABALONE Photosensor
|
7 pages, 9 figures, LIDINE 2021: LIght Detection In Noble Elements
|
2022 JINST 17 C01038
|
10.1088/1748-0221/17/01/C01038
| null |
physics.ins-det hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The ABALONE is a new type of photosensor produced by PhotonLab, Inc. with
cost effective mass production, robustness and high performance. This modern
technology provides sensitivity to visible and UV light, exceptional
radio-purity and excellent detection performance in terms of intrinsic gain,
afterpulsing rate, timing resolution and single-photon sensitivity. For these
reasons, the ABALONE can have many fields of application, including particle
physics experiments, such as DARWIN, and medical imaging. This new hybrid
photosensor, that works as light intensifier, is based on the acceleration in
vacuum of photoelectrons generated in a traditional photosensor cathode and
guided towards a window of scintillating material that can be read from the
outside through a silicon photomultiplier. In this work we present the
simulation of the ABALONE and the results from operation at room temperature.
The goal of the characterization is the evaluation of the gain, the response in
time and the single photoelectron spectrum as a function of the electric field
and the photoelectron emission angle. Details of future tests will be also
discussed.
|
[{'version': 'v1', 'created': 'Thu, 4 Nov 2021 14:59:58 GMT'}
{'version': 'v2', 'created': 'Fri, 10 Dec 2021 12:38:03 GMT'}]
|
2022-01-20
|
[array(["D'Andrea", 'V.', ''], dtype=object)
array(['Biondi', 'R.', ''], dtype=object)
array(['Ferrari', 'C.', ''], dtype=object)
array(['Ferella', 'A. D.', ''], dtype=object)
array(['Mahlstedt', 'J.', ''], dtype=object)
array(['Pieramico', 'G.', ''], dtype=object)]
|
3,211 |
1506.06174
|
Piotr Nayar
|
Sergey Bobkov, Piotr Nayar, Prasad Tetali
|
Concentration Properties of Restricted Measures with Applications to
Non-Lipschitz Functions
|
18 pages
| null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that for any metric probability space $(M,d,\mu)$ with a subgaussian
constant $\sigma^2(\mu)$ and any set $A \subset M$ we have $\sigma^2(\mu_A)
\leq c \log\left(e/\mu(A)\right)\,\sigma^2(\mu)$, where $\mu_A$ is a
restriction of $\mu$ to the set $A$ and $c$ is a universal constant. As a
consequence we deduce concentration inequalities for non-Lipschitz functions.
|
[{'version': 'v1', 'created': 'Fri, 19 Jun 2015 22:44:03 GMT'}]
|
2015-06-23
|
[array(['Bobkov', 'Sergey', ''], dtype=object)
array(['Nayar', 'Piotr', ''], dtype=object)
array(['Tetali', 'Prasad', ''], dtype=object)]
|
3,212 |
1805.04129
|
Rodrigo Lopez-Pablos
|
Rodrigo Lopez-Pablos and Horacio D. Kuna
|
A Proposal for Outlier and Noise Detection in Public Officials'
Affidavits
|
10 pages, 2 figures, XXII Argentine Congress of Computer Science
Selected Papers, pp. 201-210
|
Computer Sciences & Technologies Series, La Plata: EDULP 2017
| null |
ISBN 978-987-4127-28-0
|
cs.CY
|
http://creativecommons.org/licenses/by/4.0/
|
Outlier and noise detection processes are highly useful in the quality
assessment of any kind of database. Such processes may have novel civic and
public applications in the detection of anomalies in public data. The purpose
of this work is to explore the possibilities of experimentation with,
validation and application of hybrid outlier and noise detection procedures in
public officials' affidavit systems currently available in Argentina.
|
[{'version': 'v1', 'created': 'Thu, 10 May 2018 18:40:42 GMT'}]
|
2018-05-14
|
[array(['Lopez-Pablos', 'Rodrigo', ''], dtype=object)
array(['Kuna', 'Horacio D.', ''], dtype=object)]
|
3,213 |
1306.4345
|
Vishakha Metre VAM
|
Vishakha Metre and Jayshree Ghorpade
|
An Overview of the Research on Texture Based Plant Leaf Classification
|
12 pages,5 figures and 3 tables
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Plant classification has a broad application prospective in agriculture and
medicine, and is especially significant to the biology diversity research. As
plants are vitally important for environmental protection, it is more important
to identify and classify them accurately. Plant leaf classification is a
technique where leaf is classified based on its different morphological
features. The goal of this paper is to provide an overview of different aspects
of texture based plant leaf classification and related things. At last we will
be concluding about the efficient method i.e. the method that gives better
performance compared to the other methods.
|
[{'version': 'v1', 'created': 'Tue, 18 Jun 2013 20:38:07 GMT'}]
|
2013-06-20
|
[array(['Metre', 'Vishakha', ''], dtype=object)
array(['Ghorpade', 'Jayshree', ''], dtype=object)]
|
3,214 |
1404.5109
|
Rashid Zia
|
Christopher M. Dodson, Jonathan A. Kurvits, Dongfang Li, and Rashid
Zia
|
Wide-angle energy-momentum spectroscopy
|
4 pages, 4 figures
| null |
10.1364/OL.39.003927
| null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Light emission is defined by its distribution in energy, momentum, and
polarization. Here, we demonstrate a method that resolves these distributions
by means of wide-angle energy-momentum spectroscopy. Specifically, we image the
back focal plane of a microscope objective through a Wollaston prism to obtain
polarized Fourier-space momentum distributions, and disperse these
two-dimensional radiation patterns through an imaging spectrograph without an
entrance slit. The resulting measurements represent a convolution of individual
radiation patterns at adjacent wavelengths, which can be readily deconvolved
using any well-defined basis for light emission. As an illustrative example, we
use this technique with the multipole basis to quantify the intrinsic emission
rates for electric and magnetic dipole transitions in europium-doped yttrium
oxide (Eu$^{3+}$:Y$_{2}$O$_{3}$) and chromium-doped magnesium oxide
(Cr$^{3+}$:MgO). Once extracted, these rates allow us to reconstruct the full,
polarized, two-dimensional radiation patterns at each wavelength.
|
[{'version': 'v1', 'created': 'Mon, 21 Apr 2014 04:28:21 GMT'}]
|
2015-06-19
|
[array(['Dodson', 'Christopher M.', ''], dtype=object)
array(['Kurvits', 'Jonathan A.', ''], dtype=object)
array(['Li', 'Dongfang', ''], dtype=object)
array(['Zia', 'Rashid', ''], dtype=object)]
|
3,215 |
1110.0099
|
Balazs Patkos
|
D\'aniel Gerbner, P\'eter L. Erd\H{o}s, Nathan Lemons, Dhruv Mubayi,
Cory Palmer, Bal\'azs Patk\'os
|
Two-part set systems
| null | null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The two part Sperner theorem of Katona and Kleitman states that if $X$ is an
$n$-element set with partition $X_1 \cup X_2$, and $\cF$ is a family of subsets
of $X$ such that no two sets $A, B \in \cF$ satisfy $A \subset B$ (or $B
\subset A$) and $A \cap X_i=B \cap X_i$ for some $i$, then $|\cF| \le {n
\choose \lfloor n/2 \rfloor}$. We consider variations of this problem by
replacing the Sperner property with the intersection property and considering
families that satisfiy various combinations of these properties on one or both
parts $X_1$, $X_2$. Along the way, we prove the following new result which may
be of independent interest: let $\cF, \cG$ be families of subsets of an
$n$-element set such that $\cF$ and $\cG$ are both intersecting and
cross-Sperner, meaning that if $A \in \cF$ and $B \in \cG$, then $A \not\subset
B$ and $B \not\subset A$. Then $|\cF| +|\cG| < 2^{n-1}$ and there are
exponentially many examples showing that this bound is tight.
|
[{'version': 'v1', 'created': 'Sat, 1 Oct 2011 13:41:52 GMT'}]
|
2016-08-14
|
[array(['Gerbner', 'Dániel', ''], dtype=object)
array(['Erdős', 'Péter L.', ''], dtype=object)
array(['Lemons', 'Nathan', ''], dtype=object)
array(['Mubayi', 'Dhruv', ''], dtype=object)
array(['Palmer', 'Cory', ''], dtype=object)
array(['Patkós', 'Balázs', ''], dtype=object)]
|
3,216 |
1003.0906
|
Alexey A. Petrov
|
Alexey A Petrov
|
Searching for New Physics with Charm
|
14 pages, no figures, 3 tables, invited talk at the 12th
International Conference on B-Physics at Hadron Machines - BEAUTY 2009,
September 07-12, 2009, Heidelberg, Germany
| null | null |
WSU-HEP-1001
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
I provide a comprehensive review of indirect searches for New Physics with
charmed mesons. I discuss current theoretical and experimental challenges and
successes in understanding decays and mixings of those mesons. I argue that in
many New Physics scenarios strong constraints, that surpass those from other
search techniques, could be placed on the allowed model parameter space using
the existent data from studies of charm transitions. This has direct
implications for direct searches of physics beyond the Standard Model at the
LHC.
|
[{'version': 'v1', 'created': 'Wed, 3 Mar 2010 21:04:17 GMT'}]
|
2010-03-05
|
[array(['Petrov', 'Alexey A', ''], dtype=object)]
|
3,217 |
1703.07972
|
Vladimir I. Korobov
|
Vladimir I. Korobov, Laurent Hilico, Jean-Philippe Karr
|
Fundamental transitions and ionization energies of the hydrogen
molecular ions at the few ppt level
|
5 pages, 5 tables, submitted to PRL
|
Phys. Rev. Lett. 118, 233001 (2017)
|
10.1103/PhysRevLett.118.233001
| null |
physics.atom-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We calculate ionization energies and fundamental vibrational transitions for
H$_2^+$, D$_2^+$, and HD$^+$ molecular ions. The NRQED expansion for the energy
in terms of the fine structure constant $\alpha$ is used. Previous calculations
of orders $m\alpha^6$ and $m\alpha^7$ are improved by including second-order
contributions due to the vibrational motion of nuclei. Furthermore, we evaluate
the largest corrections at the order $m\alpha^8$. That allows to reduce the
fractional uncertainty to the level of $7\cdot10^{-12}$ for fundamental
transitions and to $4\cdot10^{-12}$ for the ionization energies.
|
[{'version': 'v1', 'created': 'Thu, 23 Mar 2017 09:10:31 GMT'}
{'version': 'v2', 'created': 'Thu, 20 Apr 2017 08:50:20 GMT'}]
|
2017-06-14
|
[array(['Korobov', 'Vladimir I.', ''], dtype=object)
array(['Hilico', 'Laurent', ''], dtype=object)
array(['Karr', 'Jean-Philippe', ''], dtype=object)]
|
3,218 |
hep-ph/9312356
|
Nikola Zovko
|
A.A.Bolokhov and N.Zovko
|
Finite $3\pi$ Cut Approximation for the $\pi N\bar{N}$ Form Factor
|
17 pages, Latex
|
Phys.Rev.C50:24-30,1994
|
10.1103/PhysRevC.50.24
| null |
hep-ph
| null |
Assuming the length of the $3\pi$ cut to be finite and approximating the
integrated amplitude by a constant, we derive an expression for the $\pi
N\bar{N}$ form factor which is very close to that given by a simple pole. The
specific predictions of the obtained form factor for the region of small
momentum transfer are discussed along the lines of the Goldberger-Treiman
relation.
|
[{'version': 'v1', 'created': 'Thu, 30 Dec 1993 15:02:19 GMT'}]
|
2008-11-26
|
[array(['Bolokhov', 'A. A.', ''], dtype=object)
array(['Zovko', 'N.', ''], dtype=object)]
|
3,219 |
1212.0959
|
Bruno Marcos
|
B. Marcos
|
Collisional relaxation of two-dimensional self-gravitating systems
|
10 pages, 8 figures. Main results unchanged, extended results and
discussion, minor corrections in formulas
| null |
10.1103/PhysRevE.88.032112
| null |
cond-mat.stat-mech astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Systems with long range interactions present generically the formation of
quasi-stationary long-lived non-equilibrium states. These states relax to
Boltzmann equilibrium following a dynamics which is not well understood. In
this paper we study this process in two-dimensional inhomogeneous
self-gravitating systems. Using the Chandrasekhar -- or local -- approximation
we write a simple approximate kinetic equation for the relaxation process,
obtaining a Fokker -- Planck equation for the velocity distribution with
explicit analytical diffusion coefficients. Performing molecular dynamics
simulations and comparing them with the evolution predicted by the Fokker --
Planck equation, we observe a good agreement with the model for all the
duration of the relaxation, from the formation of the quasi-stationary state to
thermal equilibrium. We observe however an overestimate or underestimate of the
relaxation rate of the particles with the slower or larger velocities
respectively. It is due to systematic errors in estimating the velocities of
the particles at the moment of the collisions, inherent to the Chandrasekhar
approximation when applied to inhomogeneous systems. Theory and simulations
give a scaling of the relaxation time proportional to the number of particles
in the system.
|
[{'version': 'v1', 'created': 'Wed, 5 Dec 2012 08:13:27 GMT'}
{'version': 'v2', 'created': 'Sat, 25 May 2013 23:51:25 GMT'}]
|
2015-06-12
|
[array(['Marcos', 'B.', ''], dtype=object)]
|
3,220 |
0903.4508
|
Etsuo Segawa
|
Kota Chisaki, Masatoshi Hamada, Norio Konno, Etsuo Segawa
|
Limit theorems for discrete-time quantum walks on trees
|
10 pages, 4 figures
|
Interdisciplinary Information Sciences 15, 423-429 (2009)
| null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a discrete-time quantum walk W_t given by the Grover
transformation on the Cayley tree. We reduce W_t to a quantum walk X_t on a
half line with a wall at the origin. This paper presents two types of limit
theorems for X_t. The first one is X_t as t\to\infty, which corresponds to a
localization in the case of an initial qubit state. The second one is X_t/t as
t\to\infty, whose limit density is given by the Konno density function [1-4].
The density appears in various situations of discrete-time cases. The
corresponding similar limit theorem was proved in [5] for a continuous-time
case on the Cayley tree.
|
[{'version': 'v1', 'created': 'Thu, 26 Mar 2009 06:16:39 GMT'}]
|
2010-09-21
|
[array(['Chisaki', 'Kota', ''], dtype=object)
array(['Hamada', 'Masatoshi', ''], dtype=object)
array(['Konno', 'Norio', ''], dtype=object)
array(['Segawa', 'Etsuo', ''], dtype=object)]
|
3,221 |
astro-ph/0301168
|
Patrick Woudt
|
Brian Warner (Univ. of Cape Town) and Patrick A. Woudt (Univ. of Cape
Town)
|
Dwarf Nova Oscillations and Quasi-Periodic Oscillations: Extension of
the Two-QPO Diagram of X-Ray Binaries, and a new kind of DNO
|
6 pages, 2 figures, to appear in the proceedings of `Magnetic
Cataclysmic Variables' (Cape Town, December 2002), eds. M. Cropper & S.
Vrielmann
| null | null | null |
astro-ph
| null |
Seventeen examples are given of Cataclysmic Variable (CV) stars possessing
both Dwarf Nova Oscillations (DNOs) and Quasi-Periodic Oscillations (QPOs).
These form an extension of the X-Ray Two-QPO correlation to frequencies three
orders of magnitude lower. We draw attention to the existence of a second type
of DNO in CVs, which is probably caused by magnetically channelled accretion
onto the white dwarf.
|
[{'version': 'v1', 'created': 'Fri, 10 Jan 2003 12:55:03 GMT'}]
|
2007-05-23
|
[array(['Warner', 'Brian', '', 'Univ. of Cape Town'], dtype=object)
array(['Woudt', 'Patrick A.', '', 'Univ. of Cape\n Town'], dtype=object)]
|
3,222 |
1410.4352
|
Thomas Huettemann
|
Thomas Huettemann and David Quinn
|
Finite domination and Novikov rings. Laurent polynomial rings in several
variables
|
39 pages
|
Journal of Pure and Applied Algebra 220 (7), 2016, pp 2648-2682
|
10.1016/j.jpaa.2015.12.004
| null |
math.KT math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a homological characterisation of those chain complexes of modules
over a Laurent polynomial ring in several indeterminates which are finitely
dominated over the ground ring (that is, are a retract up to homotopy of a
bounded complex of finitely generated free modules). The main tools, which we
develop in the paper, are a non-standard totalisation construction for
multi-complexes based on truncated products, and a high-dimensional mapping
torus construction employing a theory of cubical diagrams that commute up to
specified coherent homotopies.
|
[{'version': 'v1', 'created': 'Thu, 16 Oct 2014 09:50:55 GMT'}]
|
2019-09-12
|
[array(['Huettemann', 'Thomas', ''], dtype=object)
array(['Quinn', 'David', ''], dtype=object)]
|
3,223 |
2209.10320
|
Aditya Kane
|
Aditya Kane, V Manushree, Sahil Khose
|
Continual VQA for Disaster Response Systems
|
Accepted at Tackling Climate Change with Machine Learning workshop at
NeurIPS 2022
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Visual Question Answering (VQA) is a multi-modal task that involves answering
questions from an input image, semantically understanding the contents of the
image and answering it in natural language. Using VQA for disaster management
is an important line of research due to the scope of problems that are answered
by the VQA system. However, the main challenge is the delay caused by the
generation of labels in the assessment of the affected areas. To tackle this,
we deployed pre-trained CLIP model, which is trained on visual-image pairs.
however, we empirically see that the model has poor zero-shot performance.
Thus, we instead use pre-trained embeddings of text and image from this model
for our supervised training and surpass previous state-of-the-art results on
the FloodNet dataset. We expand this to a continual setting, which is a more
real-life scenario. We tackle the problem of catastrophic forgetting using
various experience replay methods. Our training runs are available at:
https://wandb.ai/compyle/continual_vqa_final. Our code is available at
https://github.com/AdityaKane2001/continual_vqa.
|
[{'version': 'v1', 'created': 'Wed, 21 Sep 2022 12:45:51 GMT'}
{'version': 'v2', 'created': 'Tue, 8 Nov 2022 01:07:11 GMT'}
{'version': 'v3', 'created': 'Thu, 10 Nov 2022 20:19:03 GMT'}]
|
2022-11-14
|
[array(['Kane', 'Aditya', ''], dtype=object)
array(['Manushree', 'V', ''], dtype=object)
array(['Khose', 'Sahil', ''], dtype=object)]
|
3,224 |
1003.0210
|
Marek Ku\'s
|
Marcin Kotowski, Michal Kotowski and Marek Kus
|
Universal nonlinear entanglement witnesses
|
14 pages
| null |
10.1103/PhysRevA.81.062318
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We give a universal recipe for constructing nonlinear entanglement witnesses
able to detect non-classical correlations in arbitrary systems of
distinguishable and/or identical particles for an arbitrary number of
constituents. The constructed witnesses are expressed in terms of expectation
values of observables. As such they are, at least in principle, measurable in
experiments
|
[{'version': 'v1', 'created': 'Sun, 28 Feb 2010 19:55:30 GMT'}]
|
2013-05-29
|
[array(['Kotowski', 'Marcin', ''], dtype=object)
array(['Kotowski', 'Michal', ''], dtype=object)
array(['Kus', 'Marek', ''], dtype=object)]
|
3,225 |
1710.10569
|
Linlin Fei
|
Linlin Fei, K. H. Luo, Chuandong Lin, Qing Li
|
Modeling incompressible thermal flows using a central-moment-based
lattice Boltzmann method
| null |
Int. J. Heat Mass Transfer 120, 624 (2018)
|
10.1016/j.ijheatmasstransfer.2017.12.052
| null |
physics.comp-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, a central-moment-based lattice Boltzmann (CLB) method for
incompressible thermal flows is proposed. In the method, the incompressible
Navier-Stokes equations and the convection-diffusion equation for the
temperature field are sloved separately by two different CLB equations. Through
the Chapman-Enskog analysis, the macroscopic governing equations for
incompressible thermal flows can be reproduced. For the flow field, the tedious
implementation for CLB method is simplified by using the shift matrix with a
simplified central-moment set, and the consistent forcing scheme is adopted to
incorporate forcing effects. Compared with several D2Q5
multiple-relaxation-time (MRT) lattice Boltzmann methods for the temperature
equation, the proposed method is shown to be better Galilean invariant through
measuring the thermal diffusivities on a moving reference frame. Thus a higher
Mach number can be used for convection flows, which decreases the computational
load significantly. Numerical simulations for several typical problems confirm
the accuracy, efficiency, and stability of the present method. The grid
convergence tests indicate that the proposed CLB method for incompressible
thermal flows is of second-order accuracy in space.
|
[{'version': 'v1', 'created': 'Sun, 29 Oct 2017 06:58:33 GMT'}]
|
2017-12-21
|
[array(['Fei', 'Linlin', ''], dtype=object)
array(['Luo', 'K. H.', ''], dtype=object)
array(['Lin', 'Chuandong', ''], dtype=object)
array(['Li', 'Qing', ''], dtype=object)]
|
3,226 |
cond-mat/0206235
|
German Drazer
|
German Drazer, Boris Khusid, Joel Koplik and Andreas Acrivos
|
Adsorption phenomena in the transport of a colloidal particle through a
nanochannel containing a partially wetting fluid
| null |
Phys. Rev. Lett. 89, 244501 (2002)
|
10.1103/PhysRevLett.89.244501
| null |
cond-mat.soft physics.chem-ph physics.flu-dyn
| null |
Using molecular dynamics simulations, we study the motion of a closely
fitting nanometer-size solid sphere in a fluid-filled cylindrical nanochannel
at low Reynolds numbers and for a wide range of fluid-solid interactions
corresponding to different wetting situations. For fluids that are not
completely wetting we observe an interesting and novel adsorption phenomenon,
in which the solid sphere, that was initially moving along the center of the
tube, meanders across the channel and suddenly adsorbes onto the wall.
Thereafter, the adsorbed sphere either {\it sticks} to the wall and remains
motionless on average, or separates slightly from the tube wall and then moves
parallel to the tube axis, while rotating on average. On the other hand, at
short times, i.e. when the solid particle moves with its center close to the
middle of the tube, we find surprisingly good agreement between our results and
the predictions of the continuum approach in spite of the large thermal
fluctuations present in our simulations.
|
[{'version': 'v1', 'created': 'Thu, 13 Jun 2002 15:31:22 GMT'}]
|
2007-05-23
|
[array(['Drazer', 'German', ''], dtype=object)
array(['Khusid', 'Boris', ''], dtype=object)
array(['Koplik', 'Joel', ''], dtype=object)
array(['Acrivos', 'Andreas', ''], dtype=object)]
|
3,227 |
2205.06270
|
Wenzer Qin
|
Wenzer Qin, Katelin Schutz, Aaron Smith, Enrico Garaldi, Rahul Kannan,
Tracy R. Slatyer, Mark Vogelsberger
|
An Effective Bias Expansion for 21 cm Cosmology in Redshift Space
|
25 pages, 10 figures
| null |
10.1103/PhysRevD.106.123506
|
MIT-CTP/5418
|
astro-ph.CO hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A near-future detection of the 21cm signal from the epoch of reionization
will provide unique opportunities to probe the underlying cosmology, provided
that such cosmological information can be extracted with precision. To this
end, we further develop effective field theory (EFT) inspired techniques for
the 21cm brightness temperature field during the epoch of reionization,
incorporating renormalized bias and a treatment of redshift space distortions.
Notably, we confirm that in redshift space, measures of the 21cm brightness,
e.g the power spectrum, should have irreducible contributions that lack a bias
coefficient and therefore contain direct, astrophysics-free information about
the cosmological density field; in this work, we study this effect beyond
linear order. To validate our theoretical treatment, we fit the predicted EFT
Fourier-space shapes to the THESAN suite of hydrodynamical simulations of
reionization at the field level, where the considerable number of modes
prevents overfitting. We find agreement at the level of a few percent between
the 21cm power spectrum from the EFT fits and simulations over the wavenumber
range $k \lesssim 0.8$ h/Mpc and neutral fraction $x_\mathrm{HI} \gtrsim 0.4$,
which is imminently measurable by the Hydrogen Epoch of Reionization Array
(HERA) and future experiments. The ability of the EFT to describe the 21cm
signal extends to simulations that have different astrophysical prescriptions
for reionization as well as simulations with interacting dark matter.
|
[{'version': 'v1', 'created': 'Thu, 12 May 2022 18:00:00 GMT'}
{'version': 'v2', 'created': 'Mon, 28 Nov 2022 17:25:26 GMT'}]
|
2022-12-28
|
[array(['Qin', 'Wenzer', ''], dtype=object)
array(['Schutz', 'Katelin', ''], dtype=object)
array(['Smith', 'Aaron', ''], dtype=object)
array(['Garaldi', 'Enrico', ''], dtype=object)
array(['Kannan', 'Rahul', ''], dtype=object)
array(['Slatyer', 'Tracy R.', ''], dtype=object)
array(['Vogelsberger', 'Mark', ''], dtype=object)]
|
3,228 |
1205.0445
|
Claudio Landim
|
J. Beltr\'an and C. Landim
|
Tunneling and Metastability of continuous time Markov chains II, the
nonreversible case
| null | null |
10.1007/s10955-012-0617-4
| null |
math.PR cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We proposed in \cite{bl2} a new approach to prove the metastable behavior of
reversible dynamics based on potential theory and local ergodicity. In this
article we extend this theory to nonreversible dynamics based on the Dirichlet
principle proved in \cite{gl2}.
|
[{'version': 'v1', 'created': 'Wed, 2 May 2012 14:45:02 GMT'}]
|
2015-06-05
|
[array(['Beltrán', 'J.', ''], dtype=object)
array(['Landim', 'C.', ''], dtype=object)]
|
3,229 |
0906.5238
|
Shabnam Akhtari
|
Shabnam Akhtari
|
The Method Of Thue-Siegel For Binary Quartic Forms
|
A version of this paper is to appear in Acta. Arith
| null |
10.4064/aa141-1-1
| null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We will use Thue-Siegel method, based on Pad\'e approximation via
hypergeometric functions, to give upper bounds for the number of integral
solutions to the equation $|F(x, y)| = 1$ as well as the inequalities $|F(x,
y)| \leq h$, for a certain family of irreducible quartic binary forms.
|
[{'version': 'v1', 'created': 'Mon, 29 Jun 2009 11:12:53 GMT'}]
|
2015-05-13
|
[array(['Akhtari', 'Shabnam', ''], dtype=object)]
|
3,230 |
1910.13627
|
Matias Quiroz
|
Robert Salomone, Matias Quiroz, Robert Kohn, Mattias Villani,
Minh-Ngoc Tran
|
Spectral Subsampling MCMC for Stationary Time Series
|
Empirical section significantly revised and extended
| null | null | null |
stat.ME stat.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Bayesian inference using Markov Chain Monte Carlo (MCMC) on large datasets
has developed rapidly in recent years. However, the underlying methods are
generally limited to relatively simple settings where the data have specific
forms of independence. We propose a novel technique for speeding up MCMC for
time series data by efficient data subsampling in the frequency domain. For
several challenging time series models, we demonstrate a speedup of up to two
orders of magnitude while incurring negligible bias compared to MCMC on the
full dataset. We also propose alternative control variates for variance
reduction based on data grouping and coreset constructions.
|
[{'version': 'v1', 'created': 'Wed, 30 Oct 2019 02:31:56 GMT'}
{'version': 'v2', 'created': 'Sun, 16 Feb 2020 00:27:50 GMT'}]
|
2020-02-18
|
[array(['Salomone', 'Robert', ''], dtype=object)
array(['Quiroz', 'Matias', ''], dtype=object)
array(['Kohn', 'Robert', ''], dtype=object)
array(['Villani', 'Mattias', ''], dtype=object)
array(['Tran', 'Minh-Ngoc', ''], dtype=object)]
|
3,231 |
2109.12085
|
Yanai Elazar
|
Yanai Elazar, Victoria Basmov, Yoav Goldberg, Reut Tsarfaty
|
Text-based NP Enrichment
|
Accepted to the TACL journal, pre-MIT Press publication version
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Understanding the relations between entities denoted by NPs in a text is a
critical part of human-like natural language understanding. However, only a
fraction of such relations is covered by standard NLP tasks and benchmarks
nowadays. In this work, we propose a novel task termed text-based NP enrichment
(TNE), in which we aim to enrich each NP in a text with all the
preposition-mediated relations -- either explicit or implicit -- that hold
between it and other NPs in the text. The relations are represented as
triplets, each denoted by two NPs related via a preposition. Humans recover
such relations seamlessly, while current state-of-the-art models struggle with
them due to the implicit nature of the problem. We build the first large-scale
dataset for the problem, provide the formal framing and scope of annotation,
analyze the data, and report the results of fine-tuned language models on the
task, demonstrating the challenge it poses to current technology. A webpage
with a data-exploration UI, a demo, and links to the code, models, and
leaderboard, to foster further research into this challenging problem can be
found at: yanaiela.github.io/TNE/.
|
[{'version': 'v1', 'created': 'Fri, 24 Sep 2021 17:23:25 GMT'}
{'version': 'v2', 'created': 'Mon, 11 Apr 2022 15:58:30 GMT'}]
|
2022-04-12
|
[array(['Elazar', 'Yanai', ''], dtype=object)
array(['Basmov', 'Victoria', ''], dtype=object)
array(['Goldberg', 'Yoav', ''], dtype=object)
array(['Tsarfaty', 'Reut', ''], dtype=object)]
|
3,232 |
2201.07597
|
Di Liu
|
Dawei Li, Di Liu, Yangkun Ren, Ziyi Wang, Zhenyu Guan, Jianwei Liu
|
Device Identification in Multimedia Systems Based on DRAM Fingerprinting
| null | null | null | null |
cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Unique identification of devices brings new security challenges to privacy
issues in intelligent multimedia systems. The device fingerprinting technology
extracts fingerprints according to the hardware and software characteristics of
the device, which can achieve long-term tracking of the device. The primary
goal of device fingerprinting is to accurately and uniquely identify a device,
which requires the generated fingerprints to have good stability. However, the
fingerprints generated by existing fingerprinting technologies are not stable
enough or change frequently, making it impossible to track the target device
for a long time. In this paper, we propose a novel DRAM-based fingerprinting
technique. The device fingerprint generated by our technique has high stability
and can be used to track the device for a long time. We leverage the Rowhammer
technique to repeatedly and quickly access a row in DRAM to get bit flips. We
then construct a physical fingerprint of the device based on the locations of
the collected bit flips. The evaluation results of the uniqueness and
reliability of the physical fingerprint show that it can be used to distinguish
devices with the same hardware and software configuration. The experimental
results of device identification in laboratory settings show that our proposed
technique can accurately identify the target device by establishing a
fingerprint database for device matching. Even if the device modifies
software-level parameters such as MAC address, IP address, or even reinstalls
the operating system, we can accurately identify the target device. This
demonstrates that our proposed fingerprinting technique can generate stable
fingerprints that are not affected by software layer parameters, enabling the
tracking of target devices for more than five months.
|
[{'version': 'v1', 'created': 'Wed, 19 Jan 2022 13:47:35 GMT'}
{'version': 'v2', 'created': 'Wed, 7 Sep 2022 08:24:28 GMT'}]
|
2022-09-08
|
[array(['Li', 'Dawei', ''], dtype=object)
array(['Liu', 'Di', ''], dtype=object)
array(['Ren', 'Yangkun', ''], dtype=object)
array(['Wang', 'Ziyi', ''], dtype=object)
array(['Guan', 'Zhenyu', ''], dtype=object)
array(['Liu', 'Jianwei', ''], dtype=object)]
|
3,233 |
1812.06562
|
Xinghua Yao
|
X. Yao, X. Li, Q. Ye, Y. Huang, Q. Cheng, and G.-Q. Zhang
|
A Robust Deep Learning Approach for Automatic Classification of Seizures
Against Non-seizures
|
13 pages, 10 figures, submitted to Biomedical Signal Processing and
Control
| null | null | null |
cs.LG q-bio.NC stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Identifying epileptic seizures through analysis of the electroencephalography
(EEG) signal becomes a standard method for the diagnosis of epilepsy. Manual
seizure identification on EEG by trained neurologists is time-consuming,
labor-intensive and error-prone, and a reliable automatic seizure/non-seizure
classification method is needed. One of the challenges in automatic
seizure/non-seizure classification is that seizure morphologies exhibit
considerable variabilities. In order to capture essential seizure patterns,
this paper leverages an attention mechanism and a bidirectional long short-term
memory (BiLSTM) to exploit both spatial and temporal discriminating features
and overcome seizure variabilities. The attention mechanism is to capture
spatial features according to the contributions of different brain regions to
seizures. The BiLSTM is to extract discriminating temporal features in the
forward and the backward directions. Cross-validation experiments and
cross-patient experiments over the noisy data of CHB-MIT are performed to
evaluate our proposed approach. The obtained average sensitivity of 87.00%,
specificity of 88.60% and precision of 88.63% in cross-validation experiments
are higher than using the current state-of-the-art methods, and the standard
deviations of our approach are lower. The evaluation results of cross-patient
experiments indicate that, our approach has better performance compared with
the current state-of-the-art methods and is more robust across patients.
|
[{'version': 'v1', 'created': 'Mon, 17 Dec 2018 00:03:13 GMT'}
{'version': 'v2', 'created': 'Thu, 6 Jun 2019 00:43:44 GMT'}]
|
2019-06-07
|
[array(['Yao', 'X.', ''], dtype=object)
array(['Li', 'X.', ''], dtype=object)
array(['Ye', 'Q.', ''], dtype=object)
array(['Huang', 'Y.', ''], dtype=object)
array(['Cheng', 'Q.', ''], dtype=object)
array(['Zhang', 'G. -Q.', ''], dtype=object)]
|
3,234 |
1908.04061
|
Thomas Rauh
|
Ramona Gr\"ober, Andreas Maier and Thomas Rauh
|
Top quark mass effects in $gg\to ZZ$ at two loops and off-shell Higgs
interference
|
14 pages, 5 figures
|
Phys. Rev. D 100, 114013 (2019)
|
10.1103/PhysRevD.100.114013
|
DESY 19-136, HU-EP-19/23, SAGEX-19-18
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider top-quark mass effects in the Higgs-interference contribution to
$Z$-boson pair production in gluon fusion. While this production mechanism is
formally of next-to-next-to leading order, its contribution is numerically
important above the top threshold $M_{ZZ}^2=4m_t^2$. This region is essential
to constrain the width of the Higgs boson and good control over the top-quark
mass dependence is crucial. We determine the form factors that are relevant for
the interference contribution at two-loop order using a method based on a
conformal mapping and Pad\'e approximants constructed from the expansions of
the amplitude for large top mass and around the top threshold.
|
[{'version': 'v1', 'created': 'Mon, 12 Aug 2019 09:17:42 GMT'}]
|
2019-12-12
|
[array(['Gröber', 'Ramona', ''], dtype=object)
array(['Maier', 'Andreas', ''], dtype=object)
array(['Rauh', 'Thomas', ''], dtype=object)]
|
3,235 |
1611.09030
|
Samin Aref
|
Samin Aref, Andrew J. Mason, and Mark C. Wilson
|
A modelling and computational study of the frustration index in signed
networks
|
25 pages, 4 figures, 6 tables Old title: An exact method for
computing the frustration index in signed networks using binary programming.
The current authors have published a book chapter under the title "Computing
the Line Index of Balance Using Integer Programming Optimisation" that can be
found in ArXiv:1710.09876. This paper is a continuation of the same line of
research with a different focus
| null | null | null |
cs.SI math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Computing the frustration index of a signed graph is a key step toward
solving problems in many fields including social networks, political science,
physics, chemistry, and biology. The frustration index determines the distance
of a network from a state of total structural balance. Although the definition
of the frustration index goes back to the 1950's, its exact algorithmic
computation, which is closely related to classic NP-hard graph problems, has
only become a focus in recent years. We develop three new binary linear
programming models to compute the frustration index exactly and efficiently as
the solution to a global optimisation problem. Solving the models with
prioritised branching and valid inequalities in Gurobi, we can compute the
frustration index of real signed networks with over 15000 edges in less than a
minute on inexpensive hardware. We provide extensive performance analysis for
both random and real signed networks and show that our models outperform all
existing approaches by large factors. Based on solve time, algorithm output,
and effective branching factor we highlight the superiority of our models to
both exact and heuristic methods in the literature.
|
[{'version': 'v1', 'created': 'Mon, 28 Nov 2016 09:10:06 GMT'}
{'version': 'v2', 'created': 'Fri, 26 May 2017 06:54:54 GMT'}
{'version': 'v3', 'created': 'Thu, 3 May 2018 12:18:03 GMT'}
{'version': 'v4', 'created': 'Mon, 26 Aug 2019 17:48:48 GMT'}]
|
2019-08-27
|
[array(['Aref', 'Samin', ''], dtype=object)
array(['Mason', 'Andrew J.', ''], dtype=object)
array(['Wilson', 'Mark C.', ''], dtype=object)]
|
3,236 |
2012.08750
|
Cong Xiao
|
Cong Xiao, Yafei Ren, Bangguo Xiong
|
Adiabatically Induced Orbital Magnetization
|
refined version
|
Phys. Rev. B 103, 115432 (2021)
|
10.1103/PhysRevB.103.115432
| null |
cond-mat.mes-hall
|
http://creativecommons.org/licenses/by/4.0/
|
A semiclassical theory for the orbital magnetization due to adiabatic
evolutions of Bloch electronic states is proposed. It renders a unified theory
for the periodic-evolution pumped orbital magnetization and the orbital
magnetoelectric response in insulators by revealing that these two phenomena
are the only instances where the induced magnetization is gauge invariant. This
theory also accounts for the electric-field induced intrinsic orbital
magnetization in two-dimensional metals and Chern insulators. We illustrate the
orbital magnetization pumped by microscopic local rotations of atoms, which
correspond to phonon modes with angular momentum, in toy models based on
honeycomb lattice, and the results are comparable to the pumped spin
magnetization via strong Rashba spin orbit coupling. We also show the vital
role of the orbital magnetoelectricity in validating the Mott relation between
the intrinsic nonlinear anomalous Hall and Ettingshausen effects.
|
[{'version': 'v1', 'created': 'Wed, 16 Dec 2020 05:39:56 GMT'}
{'version': 'v2', 'created': 'Mon, 21 Dec 2020 00:50:24 GMT'}
{'version': 'v3', 'created': 'Sun, 3 Jan 2021 19:32:39 GMT'}]
|
2021-03-24
|
[array(['Xiao', 'Cong', ''], dtype=object)
array(['Ren', 'Yafei', ''], dtype=object)
array(['Xiong', 'Bangguo', ''], dtype=object)]
|
3,237 |
1608.01082
|
Jinghua Wang
|
Jinghua Wang, Zhenhua Wang, Dacheng Tao, Simon See, Gang Wang
|
Learning Common and Specific Features for RGB-D Semantic Segmentation
with Deconvolutional Networks
|
ECCV 2016, 16 pages, 3 figures
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we tackle the problem of RGB-D semantic segmentation of indoor
images. We take advantage of deconvolutional networks which can predict
pixel-wise class labels, and develop a new structure for deconvolution of
multiple modalities. We propose a novel feature transformation network to
bridge the convolutional networks and deconvolutional networks. In the feature
transformation network, we correlate the two modalities by discovering common
features between them, as well as characterize each modality by discovering
modality specific features. With the common features, we not only closely
correlate the two modalities, but also allow them to borrow features from each
other to enhance the representation of shared information. With specific
features, we capture the visual patterns that are only visible in one modality.
The proposed network achieves competitive segmentation accuracy on NYU depth
dataset V1 and V2.
|
[{'version': 'v1', 'created': 'Wed, 3 Aug 2016 06:05:16 GMT'}]
|
2016-08-04
|
[array(['Wang', 'Jinghua', ''], dtype=object)
array(['Wang', 'Zhenhua', ''], dtype=object)
array(['Tao', 'Dacheng', ''], dtype=object)
array(['See', 'Simon', ''], dtype=object)
array(['Wang', 'Gang', ''], dtype=object)]
|
3,238 |
2011.10003
|
Viswanath R. N.
|
G. Nirmala Devi, R. N. Viswanath, C. Lakshmanan, G. Suresh, R.
Rajaraman
|
Porous Structured Au Colloids: Insights in to Morphology, Optical and
Antimicrobial Activity
| null | null | null | null |
cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
Porous structured Au colloids have been prepared from bulk nanoporous Au by
means of an element dissociation method. The microscopic techniques (scanning
electron microscope and atomic force microscope), UV-Vis spectroscopy and zone
diffusion method have been employed to study their morphology, optical property
and anti-microbial activity against Gram-positive and Gram-negative bacterial
strains, respectively. It is shown that the porous structured Au colloidal
suspension exhibit excellent optical and antimicrobial properties. The
noticeable features present in the optical studies are two Plasmon resonance
peaks at 477 and 546 nm with overlapping of these peaks at a wavelength of 520
nm. The morphology studies by SEM and AFM indicate that the Au colloids are rod
shaped with an assembly of skeletal pore and ligament structure. The analysis
of the antimicrobial activity testing reveals that the porous structured Au
colloids have greater inhibitory effect against the tested Gram-positive and
Gram-negative bacterial strains.
|
[{'version': 'v1', 'created': 'Thu, 19 Nov 2020 17:58:47 GMT'}]
|
2020-11-20
|
[array(['Devi', 'G. Nirmala', ''], dtype=object)
array(['Viswanath', 'R. N.', ''], dtype=object)
array(['Lakshmanan', 'C.', ''], dtype=object)
array(['Suresh', 'G.', ''], dtype=object)
array(['Rajaraman', 'R.', ''], dtype=object)]
|
3,239 |
0808.0292
|
Michael Galperin
|
Michael Galperin, Mark A. Ratner, and Abraham Nitzan
|
Raman scattering in current carrying molecular junctions. A preliminary
account
|
46 pages, 7 figures
|
J. Chem. Phys. 130, 144109 (2009).
|
10.1063/1.3109900
| null |
cond-mat.mes-hall cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This is a preliminary acount of a theory for Raman scattering by
current-carrying molecular junctions. The approach combines a non-equilibrium
Green's function (NEGF) description of the non-equilibrium junction with a
generalized scattering theory formulation for evaluating the light scattering
signal. This generalizes our previous study (Phys. Rev. Lett. 95, 206802
(2005); J. Chem. Phys. 124, 234709 (2006)) of junction spectroscopy by
including molecular vibrations and developing machinery for calculation of
state-to-state (Raman scattering) fluxes within the NEGF formalism. For large
enough voltage bias we find that the light scattering signal contains, in
addition to the normal signal associated with the molecular ground electronic
state, also a contribution from the inverse process originated from the excited
molecular state as well as an interference component. The effect of coupling to
the electrodes and of the imposed bias on the total Raman scattering as well as
its components are discussed. Our result reduces to the standard expression for
Raman scattering in the isolated molecule case, i.e. in the absence of coupling
to the electrodes. The theory is used to discuss the charge transfer
contribution to surface enhanced Raman scattering for molecules adsorbed on
metal surfaces and its manifestation in the biased junction.
|
[{'version': 'v1', 'created': 'Sun, 3 Aug 2008 03:18:50 GMT'}]
|
2009-04-09
|
[array(['Galperin', 'Michael', ''], dtype=object)
array(['Ratner', 'Mark A.', ''], dtype=object)
array(['Nitzan', 'Abraham', ''], dtype=object)]
|
3,240 |
1811.04928
|
Oleg Kochukhov
|
O. Kochukhov, M. Shultz, C. Neiner
|
Magnetic field topologies of the bright, weak-field Ap stars theta
Aurigae and epsilon Ursae Majoris
|
20 pages, 17 figures; accepted for publication in Astronomy &
Astrophysics
|
A&A 621, A47 (2019)
|
10.1051/0004-6361/201834279
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The brightest magnetic chemically peculiar stars theta Aur and eps UMa were
targeted by numerous studies of their photometric and spectroscopic
variability. Detailed maps of chemical abundance spots were repeatedly derived
for both stars. However, very little information on the magnetic field
geometries of these stars is available. In this study we aim to determine
detailed magnetic field topologies of theta Aur and eps UMa based on modern,
high-resolution spectropolarimetric observations. Both targets were observed in
all four Stokes parameters using the Narval and ESPaDOnS spectropolarimeters. A
multi-line technique of least-squares deconvolution was employed to detect
polarisation signatures in spectral lines. These signatures were modelled with
a Zeeman-Doppler imaging code. We succeeded in detecting variable circular and
linear polarisation signatures for theta Aur. Only circular polarisation was
detected for eps UMa. We obtained new sets of high-precision longitudinal
magnetic field measurements using mean circular polarisation metal line
profiles as well as hydrogen line cores, which are consistent with historical
data. Magnetic inversions revealed distorted dipolar geometries in both stars.
The Fe and Cr abundance distributions, reconstructed simultaneously with
magnetic mapping, do not show a clear correlation with the local magnetic field
properties, with the exception of a relative element underabundance in the
horizontal field regions along the magnetic equators. Our study provides the
first ever detailed surface magnetic field maps for broad-line, weak-field
chemically peculiar stars, showing that their field topologies are
qualitatively similar to those found in stronger-field stars. The Fe and Cr
chemical abundance maps reconstructed for theta Aur and eps UMa are at odds
with the predictions of current theoretical atomic diffusion calculations.
|
[{'version': 'v1', 'created': 'Mon, 12 Nov 2018 19:00:00 GMT'}]
|
2019-01-09
|
[array(['Kochukhov', 'O.', ''], dtype=object)
array(['Shultz', 'M.', ''], dtype=object)
array(['Neiner', 'C.', ''], dtype=object)]
|
3,241 |
1707.01477
|
Michael Veale
|
Reuben Binns, Michael Veale, Max Van Kleek, Nigel Shadbolt
|
Like trainer, like bot? Inheritance of bias in algorithmic content
moderation
|
12 pages, 3 figures, 9th International Conference on Social
Informatics (SocInfo 2017), Oxford, UK, 13--15 September 2017 (forthcoming in
Springer Lecture Notes in Computer Science)
| null |
10.1007/978-3-319-67256-4_32
| null |
cs.CY cs.CL cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The internet has become a central medium through which `networked publics'
express their opinions and engage in debate. Offensive comments and personal
attacks can inhibit participation in these spaces. Automated content moderation
aims to overcome this problem using machine learning classifiers trained on
large corpora of texts manually annotated for offence. While such systems could
help encourage more civil debate, they must navigate inherently normatively
contestable boundaries, and are subject to the idiosyncratic norms of the human
raters who provide the training data. An important objective for platforms
implementing such measures might be to ensure that they are not unduly biased
towards or against particular norms of offence. This paper provides some
exploratory methods by which the normative biases of algorithmic content
moderation systems can be measured, by way of a case study using an existing
dataset of comments labelled for offence. We train classifiers on comments
labelled by different demographic subsets (men and women) to understand how
differences in conceptions of offence between these groups might affect the
performance of the resulting models on various test sets. We conclude by
discussing some of the ethical choices facing the implementers of algorithmic
moderation systems, given various desired levels of diversity of viewpoints
amongst discussion participants.
|
[{'version': 'v1', 'created': 'Wed, 5 Jul 2017 17:19:45 GMT'}]
|
2017-09-06
|
[array(['Binns', 'Reuben', ''], dtype=object)
array(['Veale', 'Michael', ''], dtype=object)
array(['Van Kleek', 'Max', ''], dtype=object)
array(['Shadbolt', 'Nigel', ''], dtype=object)]
|
3,242 |
hep-th/0312293
|
Erhard Seiler
|
Max Niedermaier and Erhard Seiler
|
Non-amenability and spontaneous symmetry breaking -- The hyperbolic
spin-chain
|
67 pages, 2 figures. Presentation changed to a more formal style,
conclusions streamlined, minor errors corrected. Version accepted for
publication by Annales Henri Poincar'e
|
Annales Henri Poincare 6 (2005) 1025-1090
| null |
MPP-2003-148
|
hep-th math-ph math.MP
| null |
The hyperbolic spin chain is used to elucidate the notion of spontaneous
symmetry breaking for a non-amenable internal symmetry group, here SO(1,2). The
noncompact symmetry is shown to be spontaneously broken -- something which
would be forbidden for a compact group by the Mermin-Wagner theorem.
Expectation functionals are defined through the L \to \infty limit of a chain
of length L; the functional measure is found to have its weight mostly on
configurations boosted by an amount increasing at least powerlike with L. This
entails that despite the non-amenability a certain subclass of noninvariant
functions is averaged to an SO(1,2) invariant result. Outside this class
symmetry breaking is generic. Performing an Osterwalder-Schrader reconstruction
based on the infinite volume averages one finds that the reconstructed quantum
theory is different from the original one. The reconstructed Hilbert space is
nonseparable and contains a separable subspace of ground states of the
reconstructed transfer operator on which SO(1,2) acts in a continuous, unitary
and irreducible way.
|
[{'version': 'v1', 'created': 'Fri, 26 Dec 2003 16:22:09 GMT'}
{'version': 'v2', 'created': 'Fri, 17 Dec 2004 12:30:42 GMT'}
{'version': 'v3', 'created': 'Fri, 22 Apr 2005 15:55:13 GMT'}]
|
2007-05-23
|
[array(['Niedermaier', 'Max', ''], dtype=object)
array(['Seiler', 'Erhard', ''], dtype=object)]
|
3,243 |
2007.13399
|
Polychronis Koliogiannis
|
A. Kanakis-Pegios and P.S. Koliogiannis and Ch.C. Moustakidis
|
Speed of sound constraints from tidal deformability of neutron stars
|
v1: 13 pages, 7 figures, 2 tables. v2: 13 pages, 7 figures, 2 tables;
accepted for publication in Phys. Rev. C
|
Phys. Rev. C 102, 055801 (2020)
|
10.1103/PhysRevC.102.055801
| null |
nucl-th astro-ph.HE gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The upper bound of the speed of sound in dense nuclear matter is one of the
most interesting but still unsolved problems in Nuclear Physics. Theoretical
studies in connection with recent observational data of isolated neutron stars
as well as binary neutron stars systems offer an excellent opportunity to shed
light on this problem. In the present work, we suggest a method to directly
relate the measured tidal deformability (polarizability) of binary neutron
stars system (before merger) to the maximum neutron star mass scenario and
possible upper bound on the speed of sound. This method is based on the simple
but efficient idea that while the upper limit of the effective tidal
deformability favors soft equations of state, the recent high measured values
of neutron star mass favor stiff ones. In the present work, firstly, using a
simple well established model we parametrize the stiffness of the equation of
state with the help of the speed of sound. Secondly, in comparison with the
recent observations by LIGO/VIRGO collaboration of two events, GW170817 and
GW190425, we suggest possible robust constraints. Moreover, we evaluate and
postulate, in the framework of the present method, what kind of future
measurements could help us to improve the stringent of the constraints on the
neutron star equation of state.
|
[{'version': 'v1', 'created': 'Mon, 27 Jul 2020 09:38:51 GMT'}
{'version': 'v2', 'created': 'Mon, 9 Nov 2020 11:06:02 GMT'}]
|
2021-01-27
|
[array(['Kanakis-Pegios', 'A.', ''], dtype=object)
array(['Koliogiannis', 'P. S.', ''], dtype=object)
array(['Moustakidis', 'Ch. C.', ''], dtype=object)]
|
3,244 |
cond-mat/0609309
|
Tero Heikkila
|
J. Zou, I. Sosnin, P. Virtanen, M. Meschke, V. T. Petrashov, and T. T.
Heikkila
|
Influence of Supercurrents on Low-Temperature Thermopower in Mesoscopic
N/S Structures
|
21 pages, 12 figures. To be published in the proceedings of the ULTI
conference organized in Lammi, Finland (2006)
|
J. Low Temp. Phys. 146, 193 (2007)
|
10.1007/s10909-006-9257-x
| null |
cond-mat.supr-con cond-mat.mes-hall
| null |
The thermopower of mesoscopic normal metal/superconductor structures has been
measured at low temperatures. Effect of supercurrent present in normal part of
the structure was studied in two cases: when it was created by applied external
magnetic field and when it was applied directly using extra superconducting
electrodes. Temperature and magnetic field dependencies of thermopower are
compared to the numerical simulations based on the quasiclassical theory of the
superconducting proximity effect.
|
[{'version': 'v1', 'created': 'Wed, 13 Sep 2006 08:34:55 GMT'}]
|
2007-05-23
|
[array(['Zou', 'J.', ''], dtype=object)
array(['Sosnin', 'I.', ''], dtype=object)
array(['Virtanen', 'P.', ''], dtype=object)
array(['Meschke', 'M.', ''], dtype=object)
array(['Petrashov', 'V. T.', ''], dtype=object)
array(['Heikkila', 'T. T.', ''], dtype=object)]
|
3,245 |
hep-ph/9708342
|
Zoltan Trocsanyi
|
Zoltan Nagy and Zoltan Trocsanyi
|
Group independent color decomposition of next-to-leading order matrix
elements for e^+ e^- \to four partons
|
11 pages, elsart style
|
Phys.Lett. B414 (1997) 187-194
|
10.1016/S0370-2693(97)01161-1
| null |
hep-ph
| null |
We present the next-to-leading order partonic cross sections involving an
electroweak vector boson and four massless partons (quarks, gluons or long
living gluinos) in a general gauge theory with a simple Lie Group. The vector
boson couples to a massless lepton pair and a quark-antiquark pair. The cross
sections are given in terms of group independent kinematical functions
multiplying the eigenvalues of the Casimir operators of the Lie group. This
kind of color decomposition is required for the calculation of O($\alpha_s^3$)
corrections to the group independent kinematical functions in the four-jet
production cross sections in electron-positron annihilation. The knowledge of
these corrections facilitates the simultaneous precision meaurement of the
strong coupling and the color charge factors using the four-jet LEP or SLC data
as well as the test whether these data favour or exclude the existence of a
light gluino.
|
[{'version': 'v1', 'created': 'Wed, 13 Aug 1997 17:49:02 GMT'}]
|
2009-10-30
|
[array(['Nagy', 'Zoltan', ''], dtype=object)
array(['Trocsanyi', 'Zoltan', ''], dtype=object)]
|
3,246 |
2208.09418
|
Xingyu Zhao
|
Wei Huang, Xingyu Zhao, Gaojie Jin, Xiaowei Huang
|
SAFARI: Versatile and Efficient Evaluations for Robustness of
Interpretability
| null | null | null | null |
cs.LG cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
Interpretability of Deep Learning (DL) models is arguably the barrier in
front of trustworthy AI. Despite great efforts made by the Explainable AI (XAI)
community, explanations lack robustness--indistinguishable input perturbations
may lead to different XAI results. Thus, it is vital to assess how robust DL
interpretability is, given an XAI technique. To this end, we identify the
following challenges that state-of-the-art is unable to cope with collectively:
i) XAI techniques are highly heterogeneous; ii) misinterpretations are normally
rare events; iii) both worst-case and overall robustness are of practical
interest. In this paper, we propose two evaluation methods to tackle them--i)
they are of black-box nature, based on Genetic Algorithm (GA) and Subset
Simulation (SS); ii) bespoke fitness functions are used by GA to solve a
constrained optimisation efficiently, while SS is dedicated to estimating rare
event probabilities; iii) two diverse metrics are introduced, concerning the
worst-case interpretation discrepancy and a probabilistic notion of
\textit{how} robust in general, respectively. We conduct experiments to study
the accuracy, sensitivity and efficiency of our methods that outperform
state-of-the-arts. Finally, we show two applications of our methods for ranking
robust XAI methods and selecting training schemes to improve both
classification and interpretation robustness.
|
[{'version': 'v1', 'created': 'Fri, 19 Aug 2022 16:07:22 GMT'}]
|
2022-08-22
|
[array(['Huang', 'Wei', ''], dtype=object)
array(['Zhao', 'Xingyu', ''], dtype=object)
array(['Jin', 'Gaojie', ''], dtype=object)
array(['Huang', 'Xiaowei', ''], dtype=object)]
|
3,247 |
1411.6388
|
Kristian Seip
|
Andriy Bondarenko and Kristian Seip
|
Helson's problem for sums of a random multiplicative function
|
This version of the paper has been accepted for publication in
Mathematika
|
Mathematika 62 (2015) 101-110
|
10.1112/S0025579315000236
| null |
math.NT math.CV math.FA math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the random functions $S_N(z):=\sum_{n=1}^N z(n) $, where $z(n)$
is the completely multiplicative random function generated by independent
Steinhaus variables $z(p)$. It is shown that ${\Bbb E} |S_N|\gg \sqrt{N}(\log
N)^{-0.05616}$ and that $({\Bbb E} |S_N|^q)^{1/q}\gg_{q} \sqrt{N}(\log
N)^{-0.07672}$ for all $q>0$.
|
[{'version': 'v1', 'created': 'Mon, 24 Nov 2014 09:15:25 GMT'}
{'version': 'v2', 'created': 'Fri, 22 May 2015 12:27:29 GMT'}]
|
2015-12-09
|
[array(['Bondarenko', 'Andriy', ''], dtype=object)
array(['Seip', 'Kristian', ''], dtype=object)]
|
3,248 |
2203.03556
|
Xian-Min Jin
|
Yu-Xin Jin, Jun-Jie Hu, Qi Li, Zhi-Cheng Luo, Fang-Yan Zhang, Hao
Tang, Kun Qian, Xian-Min Jin
|
Quantum Deep Learning for Mutant COVID-19 Strain Prediction
|
34 pages, 4 figures, 2 supplementary figures
| null | null | null |
cs.LG quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
New COVID-19 epidemic strains like Delta and Omicron with increased
transmissibility and pathogenicity emerge and spread across the whole world
rapidly while causing high mortality during the pandemic period. Early
prediction of possible variants (especially spike protein) of COVID-19 epidemic
strains based on available mutated SARS-CoV-2 RNA sequences may lead to early
prevention and treatment. Here, combining the advantage of quantum and
quantum-inspired algorithms with the wide application of deep learning, we
propose a development tool named DeepQuantum, and use this software to realize
the goal of predicting spike protein variation structure of COVID-19 epidemic
strains. In addition, this hybrid quantum-classical model for the first time
achieves quantum-inspired blur convolution similar to classical depthwise
convolution and also successfully applies quantum progressive training with
quantum circuits, both of which guarantee that our model is the quantum
counterpart of the famous style-based GAN. The results state that the
fidelities of random generating spike protein variation structure are always
beyond 96% for Delta, 94% for Omicron. The training loss curve is more stable
and converges better with multiple loss functions compared with the
corresponding classical algorithm. At last, evidences that quantum-inspired
algorithms promote the classical deep learning and hybrid models effectively
predict the mutant strains are strong.
|
[{'version': 'v1', 'created': 'Fri, 4 Mar 2022 08:33:28 GMT'}]
|
2022-03-08
|
[array(['Jin', 'Yu-Xin', ''], dtype=object)
array(['Hu', 'Jun-Jie', ''], dtype=object)
array(['Li', 'Qi', ''], dtype=object)
array(['Luo', 'Zhi-Cheng', ''], dtype=object)
array(['Zhang', 'Fang-Yan', ''], dtype=object)
array(['Tang', 'Hao', ''], dtype=object)
array(['Qian', 'Kun', ''], dtype=object)
array(['Jin', 'Xian-Min', ''], dtype=object)]
|
3,249 |
1011.4917
|
Sourav Chatterjee
|
Sourav Chatterjee, Kannan Soundararajan
|
Random multiplicative functions in short intervals
|
13 pages. To appear in Int. Math. Res. Notices
| null | null | null |
math.NT math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider random multiplicative functions taking the values $\pm 1$. Using
Stein's method for normal approximation, we prove a central limit theorem for
the sum of such multiplicative functions in appropriate short intervals.
|
[{'version': 'v1', 'created': 'Mon, 22 Nov 2010 19:38:33 GMT'}
{'version': 'v2', 'created': 'Wed, 2 Feb 2011 00:36:01 GMT'}]
|
2011-02-03
|
[array(['Chatterjee', 'Sourav', ''], dtype=object)
array(['Soundararajan', 'Kannan', ''], dtype=object)]
|
3,250 |
1209.4069
|
Matthew Hummon
|
Matthew T. Hummon, Mark Yeo, Benjamin K. Stuhl, Alejandra L. Collopy,
Yong Xia, Jun Ye
|
Magneto-optical trapping of diatomic molecules
|
13 pages, 4 main figures, 3 supplementary figures
|
Phys. Rev. Lett. 110, 143001 (2013)
|
10.1103/PhysRevLett.110.143001
| null |
physics.atom-ph physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The development of the magneto-optical trap revolutionized the fields of
atomic and quantum physics by providing a simple method for the rapid
production of ultracold, trapped atoms. A similar technique for producing a
diverse set of dense, ultracold diatomic molecular species will likewise
transform the study of strongly interacting quantum systems, precision
measurement, and physical chemistry. We demonstrate one- and two-dimensional
transverse laser cooling and magneto-optical trapping of the polar molecule
yttrium (II) oxide (YO). Using a quasicycling optical transition we observe
transverse Doppler cooling of a YO molecular beam to a temperature of 5 mK,
limited by interaction time. With the addition of an oscillating magnetic
quadrupole field we demonstrate a transverse magneto-optical trap and achieve
temperatures of 2 mK.
|
[{'version': 'v1', 'created': 'Tue, 18 Sep 2012 19:34:50 GMT'}]
|
2014-04-17
|
[array(['Hummon', 'Matthew T.', ''], dtype=object)
array(['Yeo', 'Mark', ''], dtype=object)
array(['Stuhl', 'Benjamin K.', ''], dtype=object)
array(['Collopy', 'Alejandra L.', ''], dtype=object)
array(['Xia', 'Yong', ''], dtype=object)
array(['Ye', 'Jun', ''], dtype=object)]
|
3,251 |
2304.03347
|
Kailai Yang
|
Kailai Yang, Shaoxiong Ji, Tianlin Zhang, Qianqian Xie, Ziyan Kuang,
Sophia Ananiadou
|
Towards Interpretable Mental Health Analysis with ChatGPT
|
Work in progress
| null | null | null |
cs.CL
|
http://creativecommons.org/licenses/by/4.0/
|
Automated mental health analysis shows great potential for enhancing the
efficiency and accessibility of mental health care, with recent methods using
pre-trained language models (PLMs) and incorporated emotional information. The
latest large language models (LLMs), such as ChatGPT, exhibit dramatic
capabilities on diverse natural language processing tasks. However, existing
studies on ChatGPT for mental health analysis bear limitations in inadequate
evaluations, ignorance of emotional information, and lack of explainability. To
bridge these gaps, we comprehensively evaluate the mental health analysis and
emotional reasoning ability of ChatGPT on 11 datasets across 5 tasks, and
analyze the effects of various emotion-based prompting strategies. Based on
these prompts, we further explore LLMs for interpretable mental health analysis
by instructing them to also generate explanations for each of their decisions.
With an annotation protocol designed by domain experts, we convey human
evaluations to assess the quality of explanations generated by ChatGPT and
GPT-3. The annotated corpus will be released for future research. Experimental
results show that ChatGPT outperforms traditional neural network-based methods
but still has a significant gap with advanced task-specific methods. Prompt
engineering with emotional cues can be effective in improving performance on
mental health analysis but suffers from a lack of robustness and inaccurate
reasoning. In addition, ChatGPT significantly outperforms GPT-3 on all criteria
in human evaluations of the explanations and approaches to human performance,
showing its great potential in explainable mental health analysis.
|
[{'version': 'v1', 'created': 'Thu, 6 Apr 2023 19:53:59 GMT'}
{'version': 'v2', 'created': 'Tue, 16 May 2023 08:32:35 GMT'}]
|
2023-05-17
|
[array(['Yang', 'Kailai', ''], dtype=object)
array(['Ji', 'Shaoxiong', ''], dtype=object)
array(['Zhang', 'Tianlin', ''], dtype=object)
array(['Xie', 'Qianqian', ''], dtype=object)
array(['Kuang', 'Ziyan', ''], dtype=object)
array(['Ananiadou', 'Sophia', ''], dtype=object)]
|
3,252 |
math/0002193
|
Pablo A. Ferrari
|
P. A. Ferrari, J. L. Lebowitz, E. Speer
|
Blocking measures for asymmetric exclusion processes via coupling
|
19 pages, one figure. Available online at:
http://projecteuclid.org/euclid.bj/1078951130
|
Bernoulli Volume 7, Number 6 (2001), 935-950
| null | null |
math.PR math-ph math.MP
| null |
We give sufficient conditions on the rates of two asymmetric exclusion
processes such that the existence of a blocking invariant measure for the first
implies the existence of such a measure for the second. The main tool is a
coupling between the two processes under which the first dominates the second
in an appropriate sense. In an appendix we construct a class of processes for
which the existence of a blocking measure can be proven directly; these are
candidates for comparison processes in applications of the main result.
|
[{'version': 'v1', 'created': 'Wed, 23 Feb 2000 19:54:18 GMT'}]
|
2007-07-02
|
[array(['Ferrari', 'P. A.', ''], dtype=object)
array(['Lebowitz', 'J. L.', ''], dtype=object)
array(['Speer', 'E.', ''], dtype=object)]
|
3,253 |
1209.4329
|
Bernd Kellner
|
Bernd C. Kellner
|
On quotients of Riemann zeta values at odd and even integer arguments
|
14 pages; final revised version; typos removed
|
J. Number Theory 133 (2013), No. 8, 2684-2698
|
10.1016/j.jnt.2013.02.008
| null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show for even positive integers $n$ that the quotient of the Riemann zeta
values $\zeta(n+1)$ and $\zeta(n)$ satisfies the equation
$$\frac{\zeta(n+1)}{\zeta(n)} = (1-\frac{1}{n}) (1-\frac{1}{2^{n+1}-1})
\frac{\mathcal{L}^\star(\mathfrak{p}_n)}{\mathfrak{p}_n'(0)},$$ where
$\mathfrak{p}_n \in \mathbb{Z}[x]$ is a certain monic polynomial of degree $n$
and $\mathcal{L}^\star: \mathbb{C}[x] \to \mathbb{C}$ is a linear functional,
which is connected with a special Dirichlet series. There exists the
decomposition $\mathfrak{p}_n(x) = x(x+1) \mathfrak{q}_n(x)$. If $n = p+1$
where $p$ is an odd prime, then $\mathfrak{q}_n$ is an Eisenstein polynomial
and therefore irreducible over $\mathbb{Z}[x]$.
|
[{'version': 'v1', 'created': 'Wed, 19 Sep 2012 18:54:36 GMT'}
{'version': 'v2', 'created': 'Tue, 28 Oct 2014 18:32:15 GMT'}
{'version': 'v3', 'created': 'Wed, 29 Oct 2014 16:39:58 GMT'}]
|
2014-10-30
|
[array(['Kellner', 'Bernd C.', ''], dtype=object)]
|
3,254 |
2209.13031
|
Sungwoo Nam
|
Sheldon Katz, Sungwoo Nam
|
Local enumerative invariants of some simple normal crossing del Pezzo
surfaces
|
Comments are welcome!
| null | null | null |
math.AG hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Inspired by M-theory and superconformal field theory, we extend the notions
of local Gromov-Witten invariants and local BPS invariants from the case of del
Pezzo surfaces to some reducible surfaces with simple normal crossings and
ample $\omega_S^*$.
|
[{'version': 'v1', 'created': 'Mon, 26 Sep 2022 21:09:25 GMT'}]
|
2022-09-28
|
[array(['Katz', 'Sheldon', ''], dtype=object)
array(['Nam', 'Sungwoo', ''], dtype=object)]
|
3,255 |
nucl-th/9503006
|
Elaine Remillard
|
David R. Harrington
|
Hadron-nucleon Total Cross Section Fluctuations from Hadron-nucleus
Total Cross Sections
|
14 pages, revtex 3.0, 4 figures available upon request
|
Phys.Rev.C52:926-931,1995
|
10.1103/PhysRevC.52.926
|
RU9488
|
nucl-th
| null |
The extent to which information about fluctuations in hadron-nucleon total
cross sections in the frozen approximation can be extracted from very high
energy hadron-nucleus total cross section measurements for a range of heavy
nuclei is discussed. The corrections to the predictions of Glauber theory due
to these fluctuations are calculated for several models for the distribution
functions, and differences of the order of 50 mb are found for heavy nuclei.
The generating function for the moments of the hadron-nucleon cross section
distributions can be approximately determined from the derivatives of the
hadron-nucleus total cross sections with respect to the nuclear geometric cross
section. The argument of the generating function, however, it limited to the
maximum value of a dimensionless thickness function obtained at zero impact
parameter for the heaviest nuclear targets: about 1.8 for pions and 3.0 for
nucleons.
|
[{'version': 'v1', 'created': 'Wed, 8 Mar 1995 20:47:37 GMT'}]
|
2009-09-25
|
[array(['Harrington', 'David R.', ''], dtype=object)]
|
3,256 |
1903.01384
|
Ted Chinburg
|
Ted Chinburg, Eduardo Friedman, Fernando Rodriguez-Villegas, James
Sundstrom
|
A case of the Rodriguez Villegas conjecture
| null |
Pacific J. Math. 321 (2022) 119-165
|
10.2140/pjm.2022.321.119
| null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let L be a number field and let E be any subgroup of the units O_L^* of L. If
rank(E) = 1, Lehmer's conjecture predicts that the height of any non-torsion
element of E is bounded below by an absolute positive constant. If rank(E) =
rank(O_L^*), Zimmert proved a lower bound on the regulator of E which grows
exponentially with [L:Q]. Fernando Rodriguez Villegas made a conjecture in 2002
that "interpolates" between these two extremes of rank. Here we prove a
high-rank case of this conjecture. Namely, it holds if L contains a subfield K
for which [L:K] >> [K:Q] and E contains the kernel of the norm map from O_L^*
to O_K^*.
|
[{'version': 'v1', 'created': 'Mon, 4 Mar 2019 17:29:49 GMT'}]
|
2023-03-08
|
[array(['Chinburg', 'Ted', ''], dtype=object)
array(['Friedman', 'Eduardo', ''], dtype=object)
array(['Rodriguez-Villegas', 'Fernando', ''], dtype=object)
array(['Sundstrom', 'James', ''], dtype=object)]
|
3,257 |
1210.0799
|
Fei Lin
|
Fei Lin and V.W. Scarola
|
Enhancing the Thermal Stability of Majorana Fermions with Redundancy
Using Dipoles in Optical Lattices
|
10 pages, 7 figures
|
Phys. Rev. Lett. 111, 220401 (2013)
|
10.1103/PhysRevLett.111.220401
| null |
cond-mat.quant-gas cond-mat.str-el quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Pairing between spinless fermions can generate Majorana fermion excitations
that exhibit intriguing properties arising from non-local correlations. But
simple models indicate that non-local correlation between Majorana fermions
becomes unstable at non-zero temperatures. We address this issue by showing
that anisotropic interactions between dipolar fermions in optical lattices can
be used to significantly enhance thermal stability. We construct a model of
oriented dipolar fermions in a square optical lattice. We find that domains
established by strong interactions exhibit enhanced correlation between
Majorana fermions over large distances and long times even at finite
temperatures, suitable for stable redundancy encoding of quantum information.
Our approach can be generalized to a variety of configurations and other
systems, such as quantum wire arrays.
|
[{'version': 'v1', 'created': 'Tue, 2 Oct 2012 15:07:53 GMT'}
{'version': 'v2', 'created': 'Thu, 28 Nov 2013 20:28:59 GMT'}]
|
2013-12-02
|
[array(['Lin', 'Fei', ''], dtype=object)
array(['Scarola', 'V. W.', ''], dtype=object)]
|
3,258 |
2002.07954
|
DaeKil Park
|
DaeKil Park and Eylee Jung
|
Comment on "Path integral action of a particle with the generalized
uncertainty principle and correspondence with noncommutativity"
|
5 pages, will appear in PRD (comment)
|
Phys. Rev. D 101 (2020) 068501
|
10.1103/PhysRevD.101.068501
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently in [Phys. Rev. D $99$ $(2019)$ 104010] the non-relativistic Feynman
propagator for harmonic oscillator system is presented when the generalized
uncertainty principle is employed. In this short comment it is shown that the
expression is incorrect. We also derive the correct expression of it.
|
[{'version': 'v1', 'created': 'Wed, 19 Feb 2020 01:32:55 GMT'}]
|
2020-04-22
|
[array(['Park', 'DaeKil', ''], dtype=object)
array(['Jung', 'Eylee', ''], dtype=object)]
|
3,259 |
0710.2531
|
Jacob Rasmussen
|
Jacob Rasmussen
|
Lens space surgeries and L-space homology spheres
|
23 pages, 3 figures
| null | null | null |
math.GT
| null |
We describe necessary and sufficient conditions for a knot in an L-space to
have an L-space homology sphere surgery. We use these conditions to reformulate
a conjecture of Berge about which knots in S^3 admit lens space surgeries.
|
[{'version': 'v1', 'created': 'Fri, 12 Oct 2007 19:14:13 GMT'}]
|
2007-10-15
|
[array(['Rasmussen', 'Jacob', ''], dtype=object)]
|
3,260 |
gr-qc/9810067
|
Simonetta Frittelli
|
Simonetta Frittelli and Ezra T. Newman
|
A variational principle for time of arrival of null geodesics
|
Contribution to J. Narlikar's festshcrift, 7 pages, two eps figures
| null | null | null |
gr-qc
| null |
Normally the issue or question of the time of arrival of light rays at an
observer coming from a given source is associated with Fermat's Principle of
Least Time which yields paths of extremal time. We here investigate a related
but different problem. We consider an observer receiving light from an extended
source that has propagated in an arbitrary gravitational field. It is assumed
from the start that the propagation is along null geodesics. Each point of the
extended source is sending out a light-cones worth of null rays and the
question arises which null rays from the source arrive first at the observer.
Stated in an a different fashion, a pulse of light comes from the source with a
wave-front as the leading edge, which rays are associated with that leading
edge. In vacuum flat-space we have, from Huygen's principle, that the rays
normal to the source constitute the leading edge and hence arrive first at an
observer. We here investigate this issue in the presence of a gravitational
field. Though it is not obvious, since the rays bend and are focused by the
gravitational field and could even cross, in fact it is the normal rays that
arrive earliest. We give two proofs both involving the extemization of the time
of arrival, one based on an idea of Schrodinger for the derivation of
gravitational frequency shifts and the other based on V.I. Arnold's theory of
generating families.
|
[{'version': 'v1', 'created': 'Tue, 20 Oct 1998 19:04:36 GMT'}]
|
2007-05-23
|
[array(['Frittelli', 'Simonetta', ''], dtype=object)
array(['Newman', 'Ezra T.', ''], dtype=object)]
|
3,261 |
1812.09269
|
Toby Gee
|
George Boxer, Frank Calegari, Toby Gee, and Vincent Pilloni
|
Abelian Surfaces over totally real fields are Potentially Modular
|
Final version (fixing minor typos found in copyediting). 292 pages,
to appear in Publ. Math. de l'IHES
| null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that abelian surfaces (and consequently curves of genus 2) over
totally real fields are potentially modular. As a consequence, we obtain the
expected meromorphic continuation and functional equations of their Hasse--Weil
zeta functions. We furthermore show the modularity of infinitely many abelian
surfaces A over Q with End_C(A)=Z. We also deduce modularity and potential
modularity results for genus one curves over (not necessarily CM) quadratic
extensions of totally real fields.
|
[{'version': 'v1', 'created': 'Fri, 21 Dec 2018 17:19:29 GMT'}
{'version': 'v2', 'created': 'Fri, 19 Nov 2021 09:23:01 GMT'}
{'version': 'v3', 'created': 'Sun, 28 Nov 2021 15:52:41 GMT'}]
|
2021-11-30
|
[array(['Boxer', 'George', ''], dtype=object)
array(['Calegari', 'Frank', ''], dtype=object)
array(['Gee', 'Toby', ''], dtype=object)
array(['Pilloni', 'Vincent', ''], dtype=object)]
|
3,262 |
1401.4442
|
Jeferson J. Arenzon
|
Gabriel A. Canova and Yan Levin and Jeferson J. Arenzon
|
Kosterlitz-Thouless and Potts transitions in a generalized XY model
|
Extended and updated version of arXiv:1207.3447v1
|
Phys. Rev. E 89, 012126 (2014)
|
10.1103/PhysRevE.89.012126
| null |
cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present extensive numerical simulations of a generalized XY model with
nematic-like terms recently proposed by Poderoso {\it et al} [PRL
106(2011)067202]. Using finite size scaling and focusing on the $q=3$ case, we
locate the transitions between the paramagnetic (P), the nematic-like (N) and
the ferromagnetic (F) phases. The results are compared with the recently
derived lower bounds for the P-N and P-F transitions. While the P-N transition
is found to be very close to the lower bound, the P-F transition occurs
significantly above the bound. Finally, the transition between the nematic-like
and the ferromagnetic phases is found to belong to the 3-states Potts
universality class.
|
[{'version': 'v1', 'created': 'Fri, 17 Jan 2014 19:40:11 GMT'}]
|
2014-01-20
|
[array(['Canova', 'Gabriel A.', ''], dtype=object)
array(['Levin', 'Yan', ''], dtype=object)
array(['Arenzon', 'Jeferson J.', ''], dtype=object)]
|
3,263 |
1903.02060
|
Gabriele Mancini
|
Massimo Grossi, Gabriele Mancini, Daisuke Naimen, Angela Pistoia
|
Bubbling nodal solutions for a large perturbation of the Moser-Trudinger
equation on planar domains
| null | null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work we study the existence of nodal solutions for the problem $$
-\Delta u = \lambda u e^{u^2+|u|^p} \text{ in }\Omega, \; u = 0 \text{ on
}\partial \Omega, $$ where $\Omega\subseteq \mathbb R^2$ is a bounded smooth
domain and $p\to 1^+$. If $\Omega$ is ball, it is known that the case $p=1$
defines a critical threshold between the existence and the non-existence of
radially symmetric sign-changing solutions. In this work we construct a
blowing-up family of nodal solutions to such problem as $p\to 1^+$, when
$\Omega$ is an arbitrary domain and $\lambda$ is small enough. As far as we
know, this is the first construction of sign-changing solutions for a
Moser-Trudinger critical equation on a non-symmetric domain.
|
[{'version': 'v1', 'created': 'Tue, 5 Mar 2019 21:19:02 GMT'}]
|
2019-03-07
|
[array(['Grossi', 'Massimo', ''], dtype=object)
array(['Mancini', 'Gabriele', ''], dtype=object)
array(['Naimen', 'Daisuke', ''], dtype=object)
array(['Pistoia', 'Angela', ''], dtype=object)]
|
3,264 |
2107.02472
|
Marco Guerini
|
Yi-Ling Chung, Serra Sinem Tekiroglu, Sara Tonelli, Marco Guerini
|
Empowering NGOs in Countering Online Hate Messages
|
Preprint of the paper published in Online Social Networks and Media
Journal (OSNEM)
| null |
10.1016/j.osnem.2021.100150
| null |
cs.CL cs.AI cs.CY cs.HC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Studies on online hate speech have mostly focused on the automated detection
of harmful messages. Little attention has been devoted so far to the
development of effective strategies to fight hate speech, in particular through
the creation of counter-messages. While existing manual scrutiny and
intervention strategies are time-consuming and not scalable, advances in
natural language processing have the potential to provide a systematic approach
to hatred management. In this paper, we introduce a novel ICT platform that NGO
operators can use to monitor and analyze social media data, along with a
counter-narrative suggestion tool. Our platform aims at increasing the
efficiency and effectiveness of operators' activities against islamophobia. We
test the platform with more than one hundred NGO operators in three countries
through qualitative and quantitative evaluation. Results show that NGOs favor
the platform solution with the suggestion tool, and that the time required to
produce counter-narratives significantly decreases.
|
[{'version': 'v1', 'created': 'Tue, 6 Jul 2021 08:36:24 GMT'}]
|
2021-07-07
|
[array(['Chung', 'Yi-Ling', ''], dtype=object)
array(['Tekiroglu', 'Serra Sinem', ''], dtype=object)
array(['Tonelli', 'Sara', ''], dtype=object)
array(['Guerini', 'Marco', ''], dtype=object)]
|
3,265 |
1104.4219
|
Jerome Petri
|
J\'er\^ome P\'etri and Guillaume Dubus
|
Implication of the striped pulsar wind model for gamma-ray binaries
|
Accepted by MNRAS
| null |
10.1111/j.1365-2966.2011.19295.x
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
(abridged) Gamma-ray binaries are massive stars with compact object
companions that are observed to emit most of their energy in the gamma-ray
range. One of these binaries is known to contain a radio pulsar, PSR B1259-63.
Synchrotron and inverse Compton emission from particles accelerated beyond the
light cylinder in striped pulsar winds has been proposed to explain the X-ray
to high energy (HE, $>$ 100 MeV) gamma-ray emission from isolated pulsars. This
pulsar model extends naturally to binary environments, where seed photons for
inverse Compton scattering are provided by the companion star. Here, we
investigate the possibility of gamma-ray emission from PSR B1259-63 in the
framework of the striped pulsar wind model. The orbital geometry of PSR
B1259-63 is well constrained by observations and the double radio pulse
suggests an almost orthogonal rotator so that the solid angle covered by the
striped region is close to $4\pi$. We calculate the orbital and rotational
phase-resolved spectral variability and light-curves to expect.
|
[{'version': 'v1', 'created': 'Thu, 21 Apr 2011 09:55:55 GMT'}
{'version': 'v2', 'created': 'Thu, 23 Jun 2011 08:48:24 GMT'}]
|
2015-05-27
|
[array(['Pétri', 'Jérôme', ''], dtype=object)
array(['Dubus', 'Guillaume', ''], dtype=object)]
|
3,266 |
2107.00060
|
Romana Boiger
|
Renato Bellotti, Romana Boiger and Andreas Adelmann
|
Fast, efficient and flexible particle accelerator optimisation using
densely connected and invertible neural networks
| null | null | null | null |
physics.acc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Particle accelerators are enabling tools for scientific exploration and
discovery in various disciplines. Finding optimized operation points for these
complex machines is a challenging task, however, due to the large number of
parameters involved and the underlying non-linear dynamics. Here, we introduce
two families of data-driven surrogate models, based on deep and invertible
neural networks, that can replace the expensive physics computer models. These
models are employed in multi-objective optimisations to find Pareto optimal
operation points for two fundamentally different types of particle
accelerators. Our approach reduces the time-to-solution for a multi-objective
accelerator optimisation up to a factor of 640 and the computational cost up to
98%. The framework established here should pave the way for future on-line and
real-time multi-objective optimisation of particle accelerators.
|
[{'version': 'v1', 'created': 'Wed, 30 Jun 2021 18:59:08 GMT'}]
|
2021-07-02
|
[array(['Bellotti', 'Renato', ''], dtype=object)
array(['Boiger', 'Romana', ''], dtype=object)
array(['Adelmann', 'Andreas', ''], dtype=object)]
|
3,267 |
1803.00225
|
Tim Tsz-Kit Lau
|
Jinshan Zeng, Tim Tsz-Kit Lau, Shaobo Lin, Yuan Yao
|
Global Convergence of Block Coordinate Descent in Deep Learning
|
27 pages, 2 figures
|
Proceeding of the 36th International Conference on Machine
Learning (ICML), 2019
| null | null |
math.OC cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Deep learning has aroused extensive attention due to its great empirical
success. The efficiency of the block coordinate descent (BCD) methods has been
recently demonstrated in deep neural network (DNN) training. However,
theoretical studies on their convergence properties are limited due to the
highly nonconvex nature of DNN training. In this paper, we aim at providing a
general methodology for provable convergence guarantees for this type of
methods. In particular, for most of the commonly used DNN training models
involving both two- and three-splitting schemes, we establish the global
convergence to a critical point at a rate of ${\cal O}(1/k)$, where $k$ is the
number of iterations. The results extend to general loss functions which have
Lipschitz continuous gradients and deep residual networks (ResNets). Our key
development adds several new elements to the Kurdyka-{\L}ojasiewicz inequality
framework that enables us to carry out the global convergence analysis of BCD
in the general scenario of deep learning.
|
[{'version': 'v1', 'created': 'Thu, 1 Mar 2018 06:11:53 GMT'}
{'version': 'v2', 'created': 'Mon, 11 Jun 2018 08:46:46 GMT'}
{'version': 'v3', 'created': 'Sat, 26 Jan 2019 07:47:35 GMT'}
{'version': 'v4', 'created': 'Sun, 12 May 2019 12:24:53 GMT'}]
|
2019-05-14
|
[array(['Zeng', 'Jinshan', ''], dtype=object)
array(['Lau', 'Tim Tsz-Kit', ''], dtype=object)
array(['Lin', 'Shaobo', ''], dtype=object)
array(['Yao', 'Yuan', ''], dtype=object)]
|
3,268 |
1107.5990
|
Jonathan Andreasen
|
Jonathan Andreasen, Patrick Sebbah, Christian Vanneste
|
Nonlinear effects in random lasers
| null |
J. Opt. Soc. Am. B 28, 2947-2955 (2011)
|
10.1364/JOSAB.28.002947
| null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recent numerical and theoretical studies have demonstrated that the modes at
threshold of a random laser are in direct correspondence with the resonances of
the same system without gain, a feature which is well known in a conventional
laser but which was not known until recently for a random laser. This paper
presents numerical results, which extend such studies to the multimode regime
that takes place when the pumping rate is progressively increased above
threshold. Behavior that is already known in standard lasers, such as mode
competition and nonlinear wave-mixing, are shown to also take place in random
lasers thus reinforcing their recent modal description. However, due to the
complexity of the laser modes and to the openness of such lasers, which
requires large external pumping to compensate for strong loss, one observes
that these effects are more pronounced than in a conventional laser.
|
[{'version': 'v1', 'created': 'Fri, 29 Jul 2011 15:03:46 GMT'}]
|
2011-11-24
|
[array(['Andreasen', 'Jonathan', ''], dtype=object)
array(['Sebbah', 'Patrick', ''], dtype=object)
array(['Vanneste', 'Christian', ''], dtype=object)]
|
3,269 |
0907.1327
|
Dinh-V.-Trung
|
Dinh-V-Trung
|
On the theory of astronomical maser. II. Polarization of maser radiation
|
17 pages, 7 figures, to appear on MNRAS
| null |
10.1111/j.1365-2966.2009.15369.x
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we investigate the polarization property of the radiation
amplified by astronomical masers in the presence of a strong magnetic field.
Our model explicitly takes into account the broadband nature of the radiation
field and the interaction of the radiation with the maser transition J=1--0.
The amplification of different realisations of the background continuum
radition by the maser is directly simulated and the Stokes parameters of the
radiation field are then obtained by averaging over the ensemble of emerging
maser radiation. For isotropic pumping and partially saturated masers we find
that the maser radiation is linearly polarized in two representative cases
where the magnetic field {\bf B} makes an angle $\theta$=30$^0$ and
$\theta$=90$^0$ to the maser axis. The linear polarization for maser radiation
obtained in our simulations for both cases are in agreement with the results of
the standard model. Furthermore, no instability during amplification is seen in
our simulations. Therefore, we conclude that there is no problem with the
previous numerical investigations of maser polarization in the unsaturated and
partially saturated regime.
|
[{'version': 'v1', 'created': 'Wed, 8 Jul 2009 01:55:59 GMT'}]
|
2015-05-13
|
[array(['Dinh-V-Trung', '', ''], dtype=object)]
|
3,270 |
hep-lat/0310058
|
Taku Izubuchi
|
Taku Izubuchi (for the RBC Collaboration)
|
B_K from Two-flavor Dynamical Domain Wall Fermions
|
Lattice2003(matrix), 3 pages, 2 figures
| null |
10.1016/S0920-5632(03)02550-7
| null |
hep-lat
| null |
We report preliminary results from an ongoing calculation of $B_K$ for
$N_f=2$ dynamical QCD with domain wall fermions. Simulations have been done
with three dynamical quark masses on $16^3 \times 32$ volumes with $L_s = 12$,
where the lattice spacing is $a^{-1} = 1.81(6)$ GeV. Using measurements on
$\sim 70$ lattices for each dynamical mass and extrapolating $\mdyn=\mval$ to
the kaon point, we find $B_K^{\rm \bar{MS}}(\mu=2{\rm GeV}) = 0.503(20)$.
|
[{'version': 'v1', 'created': 'Mon, 27 Oct 2003 02:40:23 GMT'}]
|
2019-08-14
|
[array(['Izubuchi', 'Taku', '', 'for the RBC Collaboration'], dtype=object)]
|
3,271 |
1302.4747
|
Kangjun Seo
|
Kangjun Seo and Chuanwei Zhang and Sumanta Tewari
|
Thermodynamic signatures for topological phase transitions to Majorana
and Weyl superfluids in ultracold Fermi gases
| null |
Phys. Rev. A 87, 063618 (2013)
|
10.1103/PhysRevA.87.063618
| null |
cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the thermodynamic signatures for the topological phase transitions
into Majorana and Weyl superfluid phases in ultracold Fermi gases in two and
three dimensions in the presence of Rashba spin-orbit coupling and a Zeeman
field. We analyze the thermodynamic properties exhibiting the distinct nature
of the topological phase transitions linked with the Majorana fermions (2D
Fermi gas) and Weyl fermions (3D Fermi gas) which can be observed
experimentally, including pressure, chemical potential, isothermal
compressibility, entropy, and specific heat, as a function of the interaction
and the Zeeman field at both zero and finite temperatures. We conclude that
among the various thermodynamic quantities, the isothermal compressibility and
the chemical potential as a function of the artificial Zeeman field have the
strongest signatures of the topological transitions in both two and three
dimensions.
|
[{'version': 'v1', 'created': 'Tue, 19 Feb 2013 21:03:05 GMT'}]
|
2013-10-22
|
[array(['Seo', 'Kangjun', ''], dtype=object)
array(['Zhang', 'Chuanwei', ''], dtype=object)
array(['Tewari', 'Sumanta', ''], dtype=object)]
|
3,272 |
1307.1928
|
C\'esar Henrique Lenzi CHL
|
C\'esar H. Lenzi and Germ\'an Lugones
|
Implications of PSR J1614-2230 for NJL hybrid star
|
Contribution for the Conference Proceedings of the Compact Stars in
the QCD Phase Diagram III (CSQCD III) conference, December 12-15, 2012,
Guaruj\'a, Brazil. http://www.astro.iag.usp.br/~foton/CSQCD3
| null | null | null |
astro-ph.HE astro-ph.SR nucl-th
|
http://creativecommons.org/licenses/publicdomain/
|
The recent determination of the mass of the pulsar PSR J1614-2230 with $1.97
\pm 0.04 M_\odot$ by \cite{Demorest}, renewed the discussions about the
possibility of exotic matter being present at the core of neutron stars. Since
the description of matter at densities beyond nuclear saturation is model
dependent, several works have explored different aspects of the fact that the
maximum neutron star mass implied by any equation of state (EoS) must exceed
the mass of PSR J1614-2230. In this article we present an extensive study of
hybrid star masses using several parametrizations of a relativistic mean-field
hadronic EoS together with a typical three-flavor NJL model with scalar, vector
and 't Hooft interactions as realized.
|
[{'version': 'v1', 'created': 'Sun, 7 Jul 2013 23:06:47 GMT'}]
|
2013-07-09
|
[array(['Lenzi', 'César H.', ''], dtype=object)
array(['Lugones', 'Germán', ''], dtype=object)]
|
3,273 |
0801.2843
|
Tzu Chiang Yuan
|
Chun-Fu Chang, Kingman Cheung and Tzu-Chiang Yuan
|
Unparticle effects in photon-photon scattering
|
8 pages, 2 figures
|
Phys.Lett.B664:291-294,2008
|
10.1016/j.physletb.2008.05.039
| null |
hep-ph
| null |
Elastic photon-photon scattering can only occur via loop diagrams in the
standard model and is naturally suppressed. Unparticle can induce tree-level
photon-photon scattering through the operator F_{\mu\nu} F^{\mu\nu} O_\U for
spin-0 unparticle or F_{\mu\alpha} F^{\alpha}_{\nu} O^{\mu\nu}_\U for spin-2
unparticle. Due to the peculiar CP-conserving phase \exp(-i d_\U \pi)
associated with the s-channel unparticle propagator, its interference effects
with the t- and u-channels on the total cross section and the angular
distribution are found to be some significance. In addition, we show that the
cross sections via unparticle exchange can be substantially larger than the
standard model contribution.
|
[{'version': 'v1', 'created': 'Fri, 18 Jan 2008 09:51:14 GMT'}
{'version': 'v2', 'created': 'Sun, 20 Jan 2008 09:11:51 GMT'}]
|
2008-11-26
|
[array(['Chang', 'Chun-Fu', ''], dtype=object)
array(['Cheung', 'Kingman', ''], dtype=object)
array(['Yuan', 'Tzu-Chiang', ''], dtype=object)]
|
3,274 |
1706.01509
|
Prudhvi Raj Dachapally
|
Prudhvi Raj Dachapally
|
Facial Emotion Detection Using Convolutional Neural Networks and
Representational Autoencoder Units
|
6 pages, 8 figures, and 3 tables
| null | null | null |
cs.CV stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Emotion being a subjective thing, leveraging knowledge and science behind
labeled data and extracting the components that constitute it, has been a
challenging problem in the industry for many years. With the evolution of deep
learning in computer vision, emotion recognition has become a widely-tackled
research problem. In this work, we propose two independent methods for this
very task. The first method uses autoencoders to construct a unique
representation of each emotion, while the second method is an 8-layer
convolutional neural network (CNN). These methods were trained on the
posed-emotion dataset (JAFFE), and to test their robustness, both the models
were also tested on 100 random images from the Labeled Faces in the Wild (LFW)
dataset, which consists of images that are candid than posed. The results show
that with more fine-tuning and depth, our CNN model can outperform the
state-of-the-art methods for emotion recognition. We also propose some exciting
ideas for expanding the concept of representational autoencoders to improve
their performance.
|
[{'version': 'v1', 'created': 'Mon, 5 Jun 2017 19:25:34 GMT'}]
|
2017-06-07
|
[array(['Dachapally', 'Prudhvi Raj', ''], dtype=object)]
|
3,275 |
2112.01660
|
Xinwei Du
|
Xinwei Du, Kailun Dong, Yuchen Zhang, Yongsheng Li, Ruei-Yu Tsay
|
The Influence of Data Pre-processing and Post-processing on Long
Document Summarization
| null | null | null | null |
cs.CL cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Long document summarization is an important and hard task in the field of
natural language processing. A good performance of the long document
summarization reveals the model has a decent understanding of the human
language. Currently, most researches focus on how to modify the attention
mechanism of the transformer to achieve a higher ROUGE score. The study of data
pre-processing and post-processing are relatively few. In this paper, we use
two pre-processing methods and a post-processing method and analyze the effect
of these methods on various long document summarization models.
|
[{'version': 'v1', 'created': 'Fri, 3 Dec 2021 00:56:17 GMT'}]
|
2021-12-06
|
[array(['Du', 'Xinwei', ''], dtype=object)
array(['Dong', 'Kailun', ''], dtype=object)
array(['Zhang', 'Yuchen', ''], dtype=object)
array(['Li', 'Yongsheng', ''], dtype=object)
array(['Tsay', 'Ruei-Yu', ''], dtype=object)]
|
3,276 |
2306.07293
|
Jinchun Wu
|
Jinchun Wu, Zelei Pana, Yixuan Liua, Quan Chena, Feng Zang, Annette
Chabebea, Chengqi Xue
|
Non-visual Effects of Road Lighting CCT on Driver's Mood, Alertness,
Fatigue and Reaction Time: A Comprehensive Neuroergonomic Evaluation Study
|
38 pages, 15 figures, 103 conferences
| null | null | null |
cs.HC
|
http://creativecommons.org/licenses/by/4.0/
|
Good nighttime road lighting is critical for driving safety. To improve the
quality of nighttime road lighting, this study used the triangulation method by
fusing "EEG evaluation + subjective evaluation + behavioral evaluation" to
qualitatively and quantitatively investigate the response characteristics of
different correlated color temperature (CCT) (3500K, 4500K, 5500K, 6500K) on
drivers' non-visual indicators (mood, alertness, fatigue and reaction time)
under specific driving conditions (monotonous driving; waiting for red light
and traffic jam; car-following task). The results showed that the CCT and Task
interaction effect is mainly related to individual alertness and reaction time.
Individual subjective emotional experience, subjective visual comfort and
psychological security are more responsive to changes in CCT than individual
mental fatigue and visual fatigue. The subjective and objective evaluation
results demonstrated that the EEG evaluation indices used in this study could
objectively reflect the response characteristics of various non-visual
indicators. The findings also revealed that moderate CCT (4500K) appears to be
the most beneficial to drivers in maintaining an ideal state of mind and body
during nighttime driving, which is manifested as: good mood experience; it
helps drivers maintain a relatively stable level of alterness and to respond
quickly to external stimuli; both mental and visual fatigue were relatively
low. This study extends nighttime road lighting design research from the
perspective of non-visual effects by using comprehensive neuroergonomic
evaluation methods, and it provides a theoretical and empirical basis for the
future development of a humanized urban road lighting design evaluation system.
|
[{'version': 'v1', 'created': 'Sat, 10 Jun 2023 04:16:19 GMT'}]
|
2023-06-14
|
[array(['Wu', 'Jinchun', ''], dtype=object)
array(['Pana', 'Zelei', ''], dtype=object)
array(['Liua', 'Yixuan', ''], dtype=object)
array(['Chena', 'Quan', ''], dtype=object)
array(['Zang', 'Feng', ''], dtype=object)
array(['Chabebea', 'Annette', ''], dtype=object)
array(['Xue', 'Chengqi', ''], dtype=object)]
|
3,277 |
2107.07166
|
Oleg Korobkin
|
Oleg Korobkin, Hyun Lim, Irina Sagert, Julien Loiseau, Christopher
Mauney, M. Alexander R. Kaltenborn, Bing-Jyun Tsao, Wesley P. Even
|
Conservation of Angular Momentum in the Fast Multipole Method
|
6 pages, 3 figures, proceedings of 2021 international SPHERIC
workshop (virtual), June, 8-11 2021
| null | null |
LA-UR-21-24198
|
astro-ph.IM
|
http://creativecommons.org/licenses/by/4.0/
|
Smoothed particle hydrodynamics (SPH) is positioned as having ideal
conservation properties. When properly implemented, conservation of total mass,
energy, and both linear and angular momentum is guaranteed exactly, up to
machine precision. This is particularly important for some applications in
computational astrophysics, such as binary dynamics, mergers, and accretion of
compact objects (neutron stars, black holes, and white dwarfs). However, in
astrophysical applications that require the inclusion of gravity, calculating
pairwise particle interactions becomes prohibitively expensive. In the Fast
Multipole Method (FMM), they are, therefore, replaced with symmetric
interactions between distant clusters of particles (contained in the tree
nodes) Although such an algorithm is linear momentum-conserving, it introduces
spurious torques that violate conservation of angular momentum. We present a
modification of FMM that is free of spurious torques and conserves angular
momentum explicitly. The new method has practically no computational overhead
compared to the standard FMM.
|
[{'version': 'v1', 'created': 'Thu, 15 Jul 2021 07:29:08 GMT'}]
|
2021-07-16
|
[array(['Korobkin', 'Oleg', ''], dtype=object)
array(['Lim', 'Hyun', ''], dtype=object)
array(['Sagert', 'Irina', ''], dtype=object)
array(['Loiseau', 'Julien', ''], dtype=object)
array(['Mauney', 'Christopher', ''], dtype=object)
array(['Kaltenborn', 'M. Alexander R.', ''], dtype=object)
array(['Tsao', 'Bing-Jyun', ''], dtype=object)
array(['Even', 'Wesley P.', ''], dtype=object)]
|
3,278 |
hep-ph/0701068
|
Andre Lessa
|
A. P. Lessa and O. L. G. Peres
|
Revising Limits on Neutrino-Majoron Couplings
|
12 pages, 5 figures
|
Phys.Rev.D75:094001,2007
|
10.1103/PhysRevD.75.094001
| null |
hep-ph
| null |
Any theory that have a global spontaneously broken symmetry will imply the
existence of very light neutral bosons or massless bosons (sometimes called
Majorons). For most of these models we have neutrino-Majoron couplings, that
appear as additional branching ratios in decays of mesons and leptons. Here we
present an updated limits on the couplings between the electron, muon and tau
neutrinos and Majorons. For such we analyze the possible effects of Majoron
emission in both meson and lepton decays. In the latter we also include an
analysis of the muon decay spectrum. Our results are
$|g_{e\alpha}|^{2}<5.5x10^{-6}$, $|g_{\mu\alpha}|^{2}<4.5x10^{-5}$ and
$|g_{\tau\alpha}|^{2}<5.5x10^{-2}$ at 90 % C. L., where $\alpha=e,\mu,\tau$.
|
[{'version': 'v1', 'created': 'Tue, 9 Jan 2007 19:26:31 GMT'}
{'version': 'v2', 'created': 'Wed, 11 Apr 2007 14:07:53 GMT'}
{'version': 'v3', 'created': 'Mon, 16 Apr 2007 12:39:36 GMT'}]
|
2008-11-26
|
[array(['Lessa', 'A. P.', ''], dtype=object)
array(['Peres', 'O. L. G.', ''], dtype=object)]
|
3,279 |
2210.06842
|
Christopher Strothmann
|
Karl Friedrich Siburg, Christopher Strothmann
|
Multivariate tail dependence and local stochastic dominance
| null | null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Given two multivariate copulas with corresponding tail dependence functions,
we investigate the relation between a natural tail dependence ordering
$\leq_{tdo}$ and the order $\leq_{loc}$ of local stochastic dominance. We show
that, although the two orderings are not equivalent in general, they coincide
for various important classes of copulas, among them all multivariate
Archimedean and bivariate lower extreme value copulas. We illustrate the
relevance of our results by an implication to risk management.
|
[{'version': 'v1', 'created': 'Thu, 13 Oct 2022 08:51:56 GMT'}
{'version': 'v2', 'created': 'Mon, 6 Feb 2023 11:45:28 GMT'}]
|
2023-02-07
|
[array(['Siburg', 'Karl Friedrich', ''], dtype=object)
array(['Strothmann', 'Christopher', ''], dtype=object)]
|
3,280 |
astro-ph/0312544
|
Darren Reed
|
Darren Reed (UW/Durham), Fabio Governato (UW/Oss. di Brera--Inaf),
Licia Verde (UPenn/Princeton), Jeffrey Gardner (Pittsburg), Thomas Quinn
(UW), Joachim Stadel (Zurich), David Merritt (Rutgers), George Lake (WSU)
|
Evolution of the Density Profiles of Dark Matter Haloes
|
Code to reproduce this profile can be downloaded from
http://www.icc.dur.ac.uk/~reed/profile.html Accepted version, minor changes,
MNRAS, 357, 82 (abstract abridged)
|
Mon.Not.Roy.Astron.Soc.357:82-96,2005
|
10.1111/j.1365-2966.2005.08612.x/abs/
| null |
astro-ph
| null |
We use numerical simulations in a Lambda CDM cosmology to model density
profiles in a set of 16 dark matter haloes with resolutions of up to 7 million
particles within the virial radius. These simulations allow us to follow
robustly the formation and evolution of the central cusp over a large mass
range of 10^11 to 10^14 M_sun, down to approximately 0.5% of the virial radius,
and from redshift 5 to the present. The cusp of the density profile is set at
redshifts of 2 or greater and remains remarkably stable to the present time,
when considered in non-comoving coordinates. We fit our haloes to a 2 parameter
profile where the steepness of the asymptotic cusp is given by gamma, and its
radial extent is described by the concentration, c_gamma. In our simulations,
we find gamma = 1.4 - 0.08Log(M/M_*) for haloes of 0.01M_* to 1000M_*, with a
large scatter of gamma ~ +/-0.3$; and c_gamma = 8*M/M_*^{-0.15}, with a large
M/M_* dependent scatter roughly equal to +/- c_gamma. Our redshift zero haloes
have inner slope parameters ranging approximately from r^{-1} to r^{-1.5}, with
a median of roughly r^{-1.3}. This 2 parameter profile fit works well for all
our halo types, whether or not they show evidence of a steep asymptotic cusp.
We also model a cluster in power law cosmologies of P ~ k^n (n=0,-1,-2,-2.7).
We find larger concentration radii and shallower cusps for steeper n. The
minimum resolved radius is well described by the mean interparticle separation.
The trend of steeper and more concentrated cusps for smaller $M/M_*$ haloes
clearly shows that dwarf sized Lambda CDM haloes have, on average,
significantly steeper density profiles within the inner few percent of the
virial radius than inferred from recent observations. Code to reproduce this
profile can be downloaded from http://www.icc.dur.ac.uk/~reed/profile.html
|
[{'version': 'v1', 'created': 'Fri, 19 Dec 2003 20:51:38 GMT'}
{'version': 'v2', 'created': 'Sun, 21 Dec 2003 17:42:36 GMT'}
{'version': 'v3', 'created': 'Fri, 1 Apr 2005 20:14:20 GMT'}]
|
2008-11-26
|
[array(['Reed', 'Darren', '', 'UW/Durham'], dtype=object)
array(['Governato', 'Fabio', '', 'UW/Oss. di Brera--Inaf'], dtype=object)
array(['Verde', 'Licia', '', 'UPenn/Princeton'], dtype=object)
array(['Gardner', 'Jeffrey', '', 'Pittsburg'], dtype=object)
array(['Quinn', 'Thomas', '', 'UW'], dtype=object)
array(['Stadel', 'Joachim', '', 'Zurich'], dtype=object)
array(['Merritt', 'David', '', 'Rutgers'], dtype=object)
array(['Lake', 'George', '', 'WSU'], dtype=object)]
|
3,281 |
2003.10579
|
Sanghamitra Dutta
|
Sanghamitra Dutta, Jianyu Wang, Gauri Joshi
|
Slow and Stale Gradients Can Win the Race
|
Some of the results have appeared in AISTATS 2018. This is an
extended version with additional results, in particular, an adaptive
synchronicity strategy called AdaSync. arXiv admin note: substantial text
overlap with arXiv:1803.01113
| null | null | null |
stat.ML cs.DC cs.LG cs.PF
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Distributed Stochastic Gradient Descent (SGD) when run in a synchronous
manner, suffers from delays in runtime as it waits for the slowest workers
(stragglers). Asynchronous methods can alleviate stragglers, but cause gradient
staleness that can adversely affect the convergence error. In this work, we
present a novel theoretical characterization of the speedup offered by
asynchronous methods by analyzing the trade-off between the error in the
trained model and the actual training runtime(wallclock time). The main novelty
in our work is that our runtime analysis considers random straggling delays,
which helps us design and compare distributed SGD algorithms that strike a
balance between straggling and staleness. We also provide a new error
convergence analysis of asynchronous SGD variants without bounded or
exponential delay assumptions. Finally, based on our theoretical
characterization of the error-runtime trade-off, we propose a method of
gradually varying synchronicity in distributed SGD and demonstrate its
performance on CIFAR10 dataset.
|
[{'version': 'v1', 'created': 'Mon, 23 Mar 2020 23:27:50 GMT'}]
|
2020-03-25
|
[array(['Dutta', 'Sanghamitra', ''], dtype=object)
array(['Wang', 'Jianyu', ''], dtype=object)
array(['Joshi', 'Gauri', ''], dtype=object)]
|
3,282 |
1906.06936
|
Marta Victoria
|
Marta Victoria, Kun Zhu, Tom Brown, Gorm B. Andresen and Martin
Greiner
|
The role of storage technologies throughout the decarbonisation of the
sector-coupled European energy system
|
22 pages, 13 figures
|
Energy Conversion and Management (2019)
|
10.1016/j.enconman.2019.111977
| null |
physics.soc-ph
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
We use an open, hourly-resolved, networked model of the European energy
system to investigate the storage requirements under decreasing CO$_2$
emissions targets and several sector-coupling scenarios. For the power system,
significant storage capacities only emerge for CO$_2$ reductions higher than
80% of 1990 level in that sector. For 95% CO$_2$ reductions, the optimal system
includes electric batteries and hydrogen storage energy capacities equivalent
to 1.4 and 19.4 times the average hourly electricity demand. Coupling heating
and transport sectors enables deeper global CO$_2$ reductions before the
required storage capacities become significant, which highlights the importance
of sector coupling strategies in the transition to low carbon energy systems. A
binary selection of storage technologies is consistently found, i.e., electric
batteries act as short-term storage to counterbalance solar photovoltaic
generation while hydrogen storage smooths wind fluctuations. Flexibility from
the electric vehicle batteries provided by coupling the transport sector avoid
the need for additional stationary batteries and reduce the usage of pumped
hydro storage. Coupling the heating sector brings to the system large
capacities of thermal energy storage to compensate for the significant seasonal
variation in heating demand.
|
[{'version': 'v1', 'created': 'Mon, 17 Jun 2019 10:36:00 GMT'}
{'version': 'v2', 'created': 'Fri, 18 Oct 2019 09:06:56 GMT'}]
|
2019-11-22
|
[array(['Victoria', 'Marta', ''], dtype=object)
array(['Zhu', 'Kun', ''], dtype=object)
array(['Brown', 'Tom', ''], dtype=object)
array(['Andresen', 'Gorm B.', ''], dtype=object)
array(['Greiner', 'Martin', ''], dtype=object)]
|
3,283 |
2110.01091
|
Hongguang Liu
|
Muxin Han, Wojciech Kaminski, Hongguang Liu
|
Finiteness of spinfoam vertex amplitude with timelike polyhedra, and the
full amplitude
|
29 pages
| null |
10.1103/PhysRevD.105.084034
| null |
gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This work focuses on Conrady-Hnybida's 4-dimensional extended spinfoam model
with timelike polyhedra, while we restrict all faces to be spacelike. Firstly,
we prove the absolute convergence of the vertex amplitude with timelike
polyhedra, when SU(1,1) boundary states are coherent states or the canonical
basis, or their finite linear combinations. Secondly, based on the finite
vertex amplitude and a proper prescription of the SU(1,1) intertwiner space, we
construct the extended spinfoam amplitude on arbitrary cellular complex, taking
into account the sum over SU(1,1) intertwiners of internal timelike polyhedra.
We observe that the sum over SU(1,1) intertwiners is infinite for the internal
timelike polyhedron that has at least 2 future-pointing and 2 past-pointing
face-normals. In order to regularize the possible divergence from summing over
SU(1,1) intertwiners, we develop a quantum cut-off scheme based on the
eigenvalue of the ``shadow operator''. The spinfoam amplitude with timelike
internal polyhedra (and spacelike faces) is finite, when 2 types of cut-offs
are imposed: one is imposed on $j$ the eigenvalue of area operator, the other
is imposed on the eigenvalue of shadow operator for every internal timelike
polyhedron that has at least 2 future-pointing and 2 past-pointing
face-normals.
|
[{'version': 'v1', 'created': 'Sun, 3 Oct 2021 20:17:00 GMT'}]
|
2022-05-04
|
[array(['Han', 'Muxin', ''], dtype=object)
array(['Kaminski', 'Wojciech', ''], dtype=object)
array(['Liu', 'Hongguang', ''], dtype=object)]
|
3,284 |
1211.3878
|
Hiroyuki Kitamoto
|
Hiroyuki Kitamoto, Yoshihisa Kitazawa
|
Scheme dependence of quantum gravity on de Sitter background
|
20 pages, 3 figures
|
Nucl.Phys. B873 (2013) 325-342
|
10.1016/j.nuclphysb.2013.04.019
|
KEK-TH-1591
|
hep-th astro-ph.CO gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We extend our investigation of the IR effects on the local dynamics of matter
fields in quantum gravity. Specifically we clarify how the IR effects depend on
the change of the quantization scheme: different parametrization of the metric
and the matter field redefinition. Conformal invariance implies effective
Lorentz invariance of the matter system in de Sitter space. An arbitrary choice
of the parametrization of the metric and the matter field redefinition does not
preserve the effective Lorentz invariance of the local dynamics. As for the
effect of different parametrization of the metric alone, the effective Lorentz
symmetry breaking term can be eliminated by shifting the background metric. In
contrast, we cannot compensate the matter field redefinition dependence by such
a way. The effective Lorentz invariance can be retained only when we adopt the
specific matter field redefinitions where all dimensionless couplings become
scale invariant at the classical level. This scheme is also singled out by
unitarity as the kinetic terms are canonically normalized.
|
[{'version': 'v1', 'created': 'Fri, 16 Nov 2012 12:40:48 GMT'}
{'version': 'v2', 'created': 'Thu, 16 May 2013 09:12:33 GMT'}]
|
2013-05-17
|
[array(['Kitamoto', 'Hiroyuki', ''], dtype=object)
array(['Kitazawa', 'Yoshihisa', ''], dtype=object)]
|
3,285 |
1305.0510
|
Zhi Li
|
Zhi Li, Xiaoqing Zhu, Josh Gahm, Rong Pan, Hao Hu, Ali C. Begen, Dave
Oran
|
Probe and Adapt: Rate Adaptation for HTTP Video Streaming At Scale
|
Bridged version submitted to IEEE Journal on Selected Areas in
Communications, Special Issue on Adaptive Media Streaming
| null |
10.1109/JSAC.2014.140405
| null |
cs.NI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Today, the technology for video streaming over the Internet is converging
towards a paradigm named HTTP-based adaptive streaming (HAS). HAS comes with
two unique flavors. First, by riding on top of HTTP/TCP, it leverages the
network-friendly TCP to achieve firewall/NATS traversal and bandwidth sharing.
Second, by pre-encoding and storing the video in a number of discrete bitrate
levels, it introduces video bitrate adaptivity in a scalable way that the video
encoding is excluded from the closed-loop adaptation. A conventional wisdom is
that the TCP throughput observed by a HAS client indicates the available
network bandwidth, thus can be used as a reliable reference for the video
bitrate selection.
We argue that this no longer holds true when HAS becomes a substantial
fraction of the Internet traffic. We show that when multiple HAS clients
compete at a network bottleneck, the presence of competing clients and the
discrete nature of the video bitrates would together create confusion for a
client to correctly perceive its fair-share bandwidth. Through analysis and
real experiments, we demonstrate that this fundamental limitation would lead
to, for example, video rate oscillation that negatively impacts the video
watching experiences. We therefore argue that it is necessary to implement at
the application layer a "probe-and-adapt" mechanism for HAS video rate
adaptation, which is akin but orthogonal to the transport-layer network rate
adaptation achieved by TCP. We present PANDA -- a client-side rate adaptation
algorithm for HAS -- as an embodiment of this idea. Our testbed results show
that compared to conventional algorithms, PANDA is able to reduce the
instability of video rate by 60%, at a given risk of buffer underrun.
|
[{'version': 'v1', 'created': 'Wed, 1 May 2013 19:34:00 GMT'}
{'version': 'v2', 'created': 'Sun, 7 Jul 2013 23:48:49 GMT'}]
|
2016-11-17
|
[array(['Li', 'Zhi', ''], dtype=object)
array(['Zhu', 'Xiaoqing', ''], dtype=object)
array(['Gahm', 'Josh', ''], dtype=object)
array(['Pan', 'Rong', ''], dtype=object)
array(['Hu', 'Hao', ''], dtype=object)
array(['Begen', 'Ali C.', ''], dtype=object)
array(['Oran', 'Dave', ''], dtype=object)]
|
3,286 |
1803.05289
|
Elise Barelli
|
Elise Barelli
|
On the Security of Some Compact Keys for McEliece Scheme
| null | null | null | null |
cs.IT cs.CR math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we study the security of the key of compact McEliece schemes
based on alternant/Goppa codes with a non-trivial permutation group, in
particular quasi-cyclic alternant codes. We show that it is possible to reduce
the key-recovery problem on the original quasi-cyclic code to the same problem
on a smaller code derived from the public key. This result is obtained thanks
to the invariant code operation which gives the subcode whose elements are
fixed by a permutation in Perm(C). The fundamental advantage is that the
invariant subcode of an alternant code is an alternant code. This approach
improves the technique of Faugere, Otmani, Tillich, Perret and Portzamparc
which uses folded codes of alternant codes obtained by using supports globally
stable by an affine map. We use a simpler approach with a unified view on
quasi-cyclic alternant codes and we treat the case of automorphisms arising
from a non affine homography. In addition, we provide an efficient algorithm to
recover the full structure of the alternant code from the structure of the
invariant code.
|
[{'version': 'v1', 'created': 'Wed, 14 Mar 2018 14:06:37 GMT'}]
|
2018-03-15
|
[array(['Barelli', 'Elise', ''], dtype=object)]
|
3,287 |
2212.06418
|
Wang Wu
|
Wu Wang
|
One-step Closure, Ideal Convergence and Monotone Determined Space
|
14pages
| null | null | null |
math.GN
|
http://creativecommons.org/licenses/by-sa/4.0/
|
Monotone determined spaces are natural topological extensions of dcpo. Its
main purpose is to build an extended framework for domain theory. In this
paper, we study the one-step closure and ideal convergence on monotone
determined space. Then we also introduce the equivalent characterizations of
c-spaces and locally hypercompact space. The main results are:1.Every c-space
has one-step closure and every locally hypercompact space has weak one-step
closure;2.A monotone determined space has one-step closure if and only if it is
d-meet continuous and has weak one-step closure. 3.IS-convergence(resp.
IGS-convergence) is topological iff X is a c-space (resp. locally hypercompact
space); 4.If X is a d-meet continuous space, then the following three
conditions are equivalent to each other: (i) X is c-space; (ii) The net (xj )
ISL-converges to x iff (xj ) I-converges to x with respect to Lawson topology;
(iii) The net (xj ) IGSL-converges to x iff (xj ) I-converges to x with respect
to Lawson topology.
|
[{'version': 'v1', 'created': 'Tue, 13 Dec 2022 07:59:10 GMT'}]
|
2022-12-14
|
[array(['Wang', 'Wu', ''], dtype=object)]
|
3,288 |
cond-mat/9810045
|
Hiroyuki Mori
|
Hiroyuki Mori
|
Localizations in coupled electronic chains
|
no figure, to appear in Phys. Rev. B
| null |
10.1103/PhysRevB.58.12699
| null |
cond-mat.str-el cond-mat.dis-nn
| null |
We studied effects of random potentials and roles of electron-electron
interactions in the gapless phase of coupled Hubbard chains, using a
renormalization group technique. For non-interacting electrons, we obtained the
localization length proportional to the number of chains, as already shown in
the other approaches. For interacting electrons, the localization length is
longer for stronger interactions, that is, the interactions counteract the
random potentials. Accordingly, the localization length is not a simple linear
function of the number of chains. This interaction effect is strongest when
there is only a single chain. We also calculate the effects of interactions and
random potentials on charge stiffness.
|
[{'version': 'v1', 'created': 'Tue, 6 Oct 1998 07:24:59 GMT'}]
|
2009-10-31
|
[array(['Mori', 'Hiroyuki', ''], dtype=object)]
|
3,289 |
math/0410132
|
Thomas Schmidt
|
Pascal Hubert (IML, Marseille), Thomas A. Schmidt (Oregon State
University)
|
Geometry of infinitely generated Veech groups
|
23 pages, 3 figures
| null | null | null |
math.GT
| null |
Veech groups uniformize Teichm\"uller geodesic curves in Riemann moduli
space. Recently, examples of infinitely generated Veech groups have been given.
We show that these can even have infinitely many cusps and infinitely many
infinite ends. We further show that examples exist for which each direction of
an infinite end is the limit of directions of inequivalent infinite ends.
|
[{'version': 'v1', 'created': 'Wed, 6 Oct 2004 05:15:59 GMT'}]
|
2007-05-23
|
[array(['Hubert', 'Pascal', '', 'IML, Marseille'], dtype=object)
array(['Schmidt', 'Thomas A.', '', 'Oregon State\n University'],
dtype=object) ]
|
3,290 |
2108.09644
|
Yuki Kamiya
|
Y. Kamiya, K. Sasaki, T. Fukui, T. Hyodo, K. Morita, K. Ogata, A.
Ohnishi, and T. Hatsuda
|
Femtoscopic study of coupled-channel $N\Xi$ and $\Lambda\Lambda$
interactions
|
13 pages, 10 figures
| null |
10.1103/PhysRevC.105.014915
|
YITP-21-79, RIKEN-iTHEMS-Report-21, NITEP 116
|
hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The momentum correlation functions of S = -2 baryon pairs (p Xi^- and Lambda
Lambda) produced in high-energy pp and pA collisions are investigated on the
basis of the coupled-channel formalism. The strong interaction is described by
the coupled-channel HAL QCD potential obtained by the lattice QCD simulations
near physical quark masses, while the hadronic source function is taken to be a
static Gaussian form. The coupled-channel effect, the threshold difference, the
realistic strong interaction, and the Coulomb interaction are fully taken into
account for the first time in the femtoscopic analysis of baryon-baryon
correlations. The characteristic features of the experimental data for the p
Xi^- and Lambda Lambda pairs at LHC are reproduced quantitatively with a
suitable choice of non-femtoscopic parameters and the source size. The
agreement between theory and experiment indicates that the N Xi (Lambda Lambda)
interaction is moderately (weakly) attractive without having a quasi-bound
(bound) state.
|
[{'version': 'v1', 'created': 'Sun, 22 Aug 2021 05:42:09 GMT'}]
|
2022-02-09
|
[array(['Kamiya', 'Y.', ''], dtype=object)
array(['Sasaki', 'K.', ''], dtype=object)
array(['Fukui', 'T.', ''], dtype=object)
array(['Hyodo', 'T.', ''], dtype=object)
array(['Morita', 'K.', ''], dtype=object)
array(['Ogata', 'K.', ''], dtype=object)
array(['Ohnishi', 'A.', ''], dtype=object)
array(['Hatsuda', 'T.', ''], dtype=object)]
|
3,291 |
1803.05299
|
Fatma Zehra Do\u{g}ru
|
Fatma Zehra Do\u{g}ru, Olcay Arslan
|
Joint Modelling of Location, Scale and Skewness Parameters of the Skew
Laplace Normal Distribution
| null | null | null | null |
math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article, we propose joint location, scale and skewness models of the
skew Laplace normal (SLN) distribution as an alternative model for joint
modelling location, scale and skewness models of the skew-t-normal (STN)
distribution when the data set contains both asymmetric and heavy-tailed
observations. We obtain the maximum likelihood (ML) estimators for the
parameters of the joint location, scale and skewness models of the SLN
distribution using the expectation-maximization (EM) algorithm. The performance
of the proposed model is demonstrated by a simulation study and a real data
example.
|
[{'version': 'v1', 'created': 'Wed, 14 Mar 2018 14:19:00 GMT'}]
|
2018-03-15
|
[array(['Doğru', 'Fatma Zehra', ''], dtype=object)
array(['Arslan', 'Olcay', ''], dtype=object)]
|
3,292 |
gr-qc/9504023
|
Mathias Pillin
|
Mathias Pillin
|
Selfdual 2-form formulation of gravity and classification of
energy-momentum tensors
|
title changed, extended version
|
Class. Quant. Grav. 13 (1996) 2379
|
10.1088/0264-9381/13/8/020
| null |
gr-qc
| null |
It is shown how the different irreducibility classes of the energy-momentum
tensor allow for a Lagrangian formulation of the gravity-matter system using a
selfdual 2-form as a basic variable. It is pointed out what kind of
difficulties arise when attempting to construct a pure spin-connection
formulation of the gravity-matter system. Ambiguities in the formulation
especially concerning the need for constraints are clarified.
|
[{'version': 'v1', 'created': 'Mon, 17 Apr 1995 01:43:50 GMT'}
{'version': 'v2', 'created': 'Tue, 17 Dec 1996 04:04:48 GMT'}]
|
2009-10-28
|
[array(['Pillin', 'Mathias', ''], dtype=object)]
|
3,293 |
1102.4305
|
Alvaro Caso
|
Alvaro Caso, Liliana Arrachea, Gustavo S. Lozano
|
Local Temperatures and Heat Flow in Quantum Driven Systems
|
9 pages, 5 figures
|
Phys. Rev. B 83, 165419 (2011)
|
10.1103/PhysRevB.83.165419
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the concept of local temperature for quantum systems driven out of
equilibrium by ac pumps showing explicitly that it is the correct indicator for
heat flow. We also show that its use allows for a generalization of the
Wiedemann Franz law.
|
[{'version': 'v1', 'created': 'Mon, 21 Feb 2011 18:46:50 GMT'}
{'version': 'v2', 'created': 'Wed, 30 Mar 2011 14:53:11 GMT'}]
|
2011-04-18
|
[array(['Caso', 'Alvaro', ''], dtype=object)
array(['Arrachea', 'Liliana', ''], dtype=object)
array(['Lozano', 'Gustavo S.', ''], dtype=object)]
|
3,294 |
2211.06914
|
Changxin Liu
|
Changxin Liu, Xuyang Wu, Xinlei Yi, Yang Shi, Karl H. Johansson
|
Rate analysis of dual averaging for nonconvex distributed optimization
|
7 pages, 2 figures
| null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This work studies nonconvex distributed constrained optimization over
stochastic communication networks. We revisit the distributed dual averaging
algorithm, which is known to converge for convex problems. We start from the
centralized case, for which the change of two consecutive updates is taken as
the suboptimality measure. We validate the use of such a measure by showing
that it is closely related to stationarity. This equips us with a handle to
study the convergence of dual averaging in nonconvex optimization. We prove
that the squared norm of this suboptimality measure converges at rate
$\mathcal{O}(1/t)$. Then, for the distributed setup we show convergence to the
stationary point at rate $\mathcal{O}(1/t)$. Finally, a numerical example is
given to illustrate our theoretical results.
|
[{'version': 'v1', 'created': 'Sun, 13 Nov 2022 14:28:07 GMT'}]
|
2022-11-15
|
[array(['Liu', 'Changxin', ''], dtype=object)
array(['Wu', 'Xuyang', ''], dtype=object)
array(['Yi', 'Xinlei', ''], dtype=object)
array(['Shi', 'Yang', ''], dtype=object)
array(['Johansson', 'Karl H.', ''], dtype=object)]
|
3,295 |
1607.01360
|
Axel Brandenburg
|
Axel Brandenburg, Tina Kahniashvili
|
Classes of hydrodynamic and magnetohydrodynamic turbulent decay
|
5 pages, 4 figures, with 3 pages supplemental material, published in
PRL
|
Phys. Rev. Lett. 118, 055102 (2017)
|
10.1103/PhysRevLett.118.055102
|
Nordita-2016-82
|
physics.flu-dyn astro-ph.CO astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We perform numerical simulations of decaying hydrodynamic and
magnetohydrodynamic turbulence. We classify our time-dependent solutions by
their evolutionary tracks in parametric plots between instantaneous scaling
exponents. We find distinct classes of solutions evolving along specific
trajectories toward points on a line of self-similar solutions. These
trajectories are determined by the underlying physics governing individual
cases, while the infrared slope of the initial conditions plays only a limited
role. In the helical case, even for a scale-invariant initial spectrum
(inversely proportional to wavenumber k), the solution evolves along the same
trajectory as for a Batchelor spectrum (proportional to k^4.
|
[{'version': 'v1', 'created': 'Mon, 4 Jul 2016 17:20:04 GMT'}
{'version': 'v2', 'created': 'Thu, 3 Nov 2016 04:51:57 GMT'}
{'version': 'v3', 'created': 'Sat, 4 Feb 2017 17:21:08 GMT'}]
|
2017-02-07
|
[array(['Brandenburg', 'Axel', ''], dtype=object)
array(['Kahniashvili', 'Tina', ''], dtype=object)]
|
3,296 |
1312.5052
|
Xavier Warin
|
Xavier Warin
|
Some non monotone schemes for Hamilton-Jacobi-Bellman equations
|
24 pages
| null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We extend the theory of Barles Jakobsen to develop numerical schemes for
Hamilton Jacobi Bellman equations. We show that the monotonicity of the schemes
can be relaxed still leading to the convergence to the viscosity solution of
the equation. We give some examples of such numerical schemes and show that the
bounds obtained by the framework developed are not tight. At last we test some
numerical schemes.
|
[{'version': 'v1', 'created': 'Wed, 18 Dec 2013 06:59:16 GMT'}
{'version': 'v2', 'created': 'Wed, 11 Feb 2015 11:59:02 GMT'}
{'version': 'v3', 'created': 'Mon, 3 Sep 2018 13:02:53 GMT'}]
|
2018-09-05
|
[array(['Warin', 'Xavier', ''], dtype=object)]
|
3,297 |
1703.07298
|
Silvio Fanzon
|
Silvio Fanzon, Mariapia Palombaro
|
Optimal lower exponent for the higher gradient integrability of
solutions to two-phase elliptic equations in two dimensions
|
23 pages, 1 figure
|
Calculus of Variations and Partial Differential Equations 56 (5),
137, 2017
|
10.1007/s00526-017-1222-9
| null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the higher gradient integrability of distributional solutions $u$ to
the equation $div(\sigma \nabla u) = 0$ in dimension two, in the case when the
essential range of $\sigma$ consists of only two elliptic matrices, i.e.,
$\sigma\in\{\sigma_1, \sigma_2\}$ a.e. in $\Omega$.
In [4], for every pair of elliptic matrices $\sigma_1$ and $\sigma_2$,
exponents $p_{\sigma_1,\sigma_2}\in(2,+\infty)$ and $q_{\sigma_1,\sigma_2}\in
(1,2)$ have been characterised so that if $u\in
W^{1,q_{\sigma_1,\sigma_2}}(\Omega)$ is solution to the elliptic equation then
$\nabla u\in L^{p_{\sigma_1,\sigma_2}}_{\rm weak}(\Omega)$ and the optimality
of the upper exponent $p_{\sigma_1,\sigma_2}$ has been proved. In this paper we
complement the above result by proving the optimality of the lower exponent
$q_{\sigma_1,\sigma_2}$. Precisely, we show that for every arbitrarily small
$\delta$, one can find a particular microgeometry, i.e., an arrangement of the
sets $\sigma^{-1}(\sigma_1)$ and $\sigma^{-1}(\sigma_2)$, for which there
exists a solution $u$ to the corresponding elliptic equation such that $\nabla
u \in L^{q_{\sigma_1,\sigma_2}-\delta}$, but $\nabla u \notin
L^{q_{\sigma_1,\sigma_2}}.$ The existence of such optimal microgeometries is
achieved by convex integration methods, adapting to the present setting the
geometric constructions provided in [2] for the isotropic case.
|
[{'version': 'v1', 'created': 'Tue, 21 Mar 2017 16:17:44 GMT'}]
|
2019-02-19
|
[array(['Fanzon', 'Silvio', ''], dtype=object)
array(['Palombaro', 'Mariapia', ''], dtype=object)]
|
3,298 |
1805.10847
|
Pablo P\'erez-Lantero
|
Luis H. Herrera and Pablo P\'erez-Lantero
|
On the intersection graph of the disks with diameters the sides of a
convex $n$-gon
| null | null | null | null |
cs.CG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Given a convex $n$-gon, we can draw $n$ disks (called side disks) where each
disk has a different side of the polygon as diameter and the midpoint of the
side as its center. The intersection graph of such disks is the undirected
graph with vertices the $n$ disks and two disks are adjacent if and only if
they have a point in common. Such a graph was introduced by Huemer and
P\'erez-Lantero in 2016, proved to be planar and Hamiltonian. In this paper we
study further combinatorial properties of this graph. We prove that the
treewidth is at most 3, by showing an $O(n)$-time algorithm that builds a tree
decomposition of width at most 3, given the polygon as input. This implies that
we can construct the intersection graph of the side disks in $O(n)$ time. We
further study the independence number of this graph, which is the maximum
number of pairwise disjoint disks. The planarity condition implies that for
every convex $n$-gon we can select at least $\lceil n/4 \rceil$ pairwise
disjoint disks, and we prove that for every $n\ge 3$ there exist convex
$n$-gons in which we cannot select more than this number. Finally, we show that
our class of graphs includes all outerplanar Hamiltonian graphs except the
cycle of length four, and that it is a proper subclass of the planar
Hamiltonian graphs.
|
[{'version': 'v1', 'created': 'Mon, 28 May 2018 10:03:58 GMT'}]
|
2018-05-29
|
[array(['Herrera', 'Luis H.', ''], dtype=object)
array(['Pérez-Lantero', 'Pablo', ''], dtype=object)]
|
3,299 |
1807.11246
|
Gert Dekkers
|
Gert Dekkers, Lode Vuegen, Toon van Waterschoot, Bart Vanrumste and
Peter Karsmakers
|
DCASE 2018 Challenge - Task 5: Monitoring of domestic activities based
on multi-channel acoustics
| null | null | null | null |
eess.AS cs.SD
|
http://creativecommons.org/licenses/by/4.0/
|
The DCASE 2018 Challenge consists of five tasks related to automatic
classification and detection of sound events and scenes. This paper presents
the setup of Task 5 which includes the description of the task, dataset and the
baseline system. In this task, it is investigated to which extent multi-channel
acoustic recordings are beneficial for the purpose of classifying domestic
activities. The goal is to exploit spectral and spatial cues independent of
sensor location using multi-channel audio. For this purpose we provided a
development and evaluation dataset which are derivatives of the SINS database
and contain domestic activities recorded by multiple microphone arrays. The
baseline system, based on a Neural Network architecture using convolutional and
dense layer(s), is intended to lower the hurdle to participate the challenge
and to provide a reference performance.
|
[{'version': 'v1', 'created': 'Mon, 30 Jul 2018 09:15:34 GMT'}
{'version': 'v2', 'created': 'Wed, 1 Aug 2018 11:41:37 GMT'}]
|
2018-08-02
|
[array(['Dekkers', 'Gert', ''], dtype=object)
array(['Vuegen', 'Lode', ''], dtype=object)
array(['van Waterschoot', 'Toon', ''], dtype=object)
array(['Vanrumste', 'Bart', ''], dtype=object)
array(['Karsmakers', 'Peter', ''], dtype=object)]
|
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