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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
6,000 |
2210.03803
|
Logan Crew
|
Logan Crew, Yongxing Zhang
|
e-basis Coefficients of Chromatic Symmetric Functions
| null | null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A well-known result of Stanley's shows that given a graph $G$ with chromatic
symmetric function expanded into the basis of elementary symmetric functions as
$X_G = \sum c_{\lambda}e_{\lambda}$, the sum of the coefficients $c_{\lambda}$
for $\lambda$ with exactly $k$ parts is equal to the number of acyclic
orientations of $G$ with exactly $k$ sinks.
However, more is known. The $sink$ $sequence$ of an acyclic orientation of
$G$ is a tuple $(s_1,\dots,s_k)$ such that $s_1$ is the number of sinks of the
orientation, and recursively each $s_i$ with $i > 1$ is the number of sinks
remaining after deleting the sinks contributing to $s_1,\dots,s_{i-1}$.
Equivalently, the sink sequence gives the number of vertices at each level of
the poset induced by the acyclic orientation.
A lesser-known follow-up result of Stanley's determines certain cases in
which we can find a sum of $e$-basis coefficients that gives the number of
acyclic orientations of $G$ with a given partial sink sequence. Of interest in
its own right, this result also admits as a corollary a simple proof of the
$e$-positivity of $X_G$ when the stability number of $G$ is $2$.
In this paper, we prove a vertex-weighted generalization of this follow-up
result, and conjecture a stronger version that admits a similar combinatorial
interpretation for a much larger set of $e$-coefficient sums of chromatic
symmetric functions. In particular, the conjectured formula would give a
combinatorial interpretation for the sum of the coefficients $c_{\lambda}$ with
prescribed values of $\lambda_1'$ and $\lambda_2'$ for any unweighted claw-free
graph.
|
[{'version': 'v1', 'created': 'Fri, 7 Oct 2022 20:19:28 GMT'}
{'version': 'v2', 'created': 'Thu, 15 Dec 2022 15:09:18 GMT'}]
|
2022-12-16
|
[array(['Crew', 'Logan', ''], dtype=object)
array(['Zhang', 'Yongxing', ''], dtype=object)]
|
6,001 |
1805.04964
|
Hiroshi Kuratsuji
|
Satoshi Tsuchida and Hiroshi Kuratsuji
|
Stochastic theory of polarized light in nonlinear birefringent media: An
application to optical rotation
| null |
International Journal of Modern Physics B Vol. 32, No. 12 (2018)
1850147
|
10.1142/S0217979218501473
| null |
cond-mat.stat-mech physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A stochastic theory is developed for the light transmitting the optical media
exhibiting linear and nonlinear birefringence. The starting point is the
two--component nonlinear Schr{"o}dinger equation (NLSE). On the basis of the
ansatz of "soliton" solution for the NLSE, the evolution equation for the
Stokes parameters is derived, which turns out to be the Langevin equation by
taking account of randomness and dissipation inherent in the birefringent
media. The Langevin equation is converted to the Fokker--Planck (FP) equation
for the probability distribution by employing the technique of functional
integral on the assumption of the Gaussian white noise for the random
fluctuation. The specific application is considered for the optical rotation,
which is described by the ellipticity (third component of the Stokes
parameters) alone: (i) The asymptotic analysis is given for the functional
integral, which leads to the transition rate on the Poincar{'e} sphere. (ii)
The FP equation is analyzed in the strong coupling approximation, by which the
diffusive behavior is obtained for the linear and nonlinear birefringence.
These would provide with a basis of statistical analysis for the polarization
phenomena in nonlinear birefringent media.
|
[{'version': 'v1', 'created': 'Sun, 13 May 2018 22:07:06 GMT'}]
|
2018-05-15
|
[array(['Tsuchida', 'Satoshi', ''], dtype=object)
array(['Kuratsuji', 'Hiroshi', ''], dtype=object)]
|
6,002 |
1402.1125
|
Arnold Neumaier
|
Arnold Neumaier
|
OSGA: A fast subgradient algorithm with optimal complexity
|
19 pages
| null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper presents an algorithm for approximately minimizing a convex
function in simple, not necessarily bounded convex domains, assuming only that
function values and subgradients are available. No global information about the
objective function is needed apart from a strong convexity parameter (which can
be put to zero if only convexity is known).
The worst case number of iterations needed to achieve a given accuracy is
independent of the dimension (which may be infinite) and - apart from a
constant factor - best possible under a variety of smoothness assumptions on
the objective function.
|
[{'version': 'v1', 'created': 'Wed, 5 Feb 2014 18:52:54 GMT'}]
|
2014-02-06
|
[array(['Neumaier', 'Arnold', ''], dtype=object)]
|
6,003 |
0801.1654
|
Tilman Sauer
|
Tilman Sauer
|
Remarks on the Origin of Path Integration: Einstein and Feynman
|
To appear in Proceedings of 'Path Integrals - New Trends and
Perspectives,' Dresden, 23-28 September 2007
| null |
10.1142/9789812837271_0001
| null |
physics.hist-ph
| null |
I offer some historical comments about the origins of Feynman's path integral
approach, as an alternative approach to standard quantum mechanics. Looking at
the interaction between Einstein and Feynman, which was mediated by Feynman's
thesis supervisor John Wheeler, it is argued that, contrary to what one might
expect, the significance of the interaction between Einstein and Feynman
pertained to a critique of classical field theory, rather than to a direct
critique of quantum mechanics itself. Nevertheless, the critical perspective on
classical field theory became a motivation and point of departure for Feynman's
space-time approach to non-relativistic quantum mechanics.
|
[{'version': 'v1', 'created': 'Thu, 10 Jan 2008 19:11:21 GMT'}]
|
2017-08-23
|
[array(['Sauer', 'Tilman', ''], dtype=object)]
|
6,004 |
2103.05101
|
Aytekin Nebisoy
|
Aytekin Nebisoy and Saber Malekzadeh
|
Video Action Recognition Using spatio-temporal optical flow video frames
| null | null | null | null |
cs.CV cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
Recognizing human actions based on videos has became one of the most popular
areas of research in computer vision in recent years. This area has many
applications such as surveillance, robotics, health care, video search and
human-computer interaction. There are many problems associated with recognizing
human actions in videos such as cluttered backgrounds, obstructions, viewpoints
variation, execution speed and camera movement. A large number of methods have
been proposed to solve the problems. This paper focus on spatial and temporal
pattern recognition for the classification of videos using Deep Neural
Networks. This model takes RGB images and Optical Flow as input data and
outputs an action class number. The final recognition accuracy was about 94%.
|
[{'version': 'v1', 'created': 'Fri, 5 Feb 2021 19:46:49 GMT'}]
|
2021-03-10
|
[array(['Nebisoy', 'Aytekin', ''], dtype=object)
array(['Malekzadeh', 'Saber', ''], dtype=object)]
|
6,005 |
physics/0312051
|
Laurette S. Tuckerman
|
Laurette S. Tuckerman and Dwight Barkley
|
Symmetry breaking and turbulence in perturbed plane Couette flow
| null |
Theoretical and Computational Fluid Dynamics 16, 91-97 (2002)
|
10.1007/s00162-002-0064-y
| null |
physics.flu-dyn
| null |
Perturbed plane Couette flow containing a thin spanwise-oriented ribbon
undergoes a subcritical bifurcation at Re = 230 to a steady 3D state containing
streamwise vortices. This bifurcation is followed by several others giving rise
to a fascinating series of stable and unstable steady states of different
symmetries and wavelengths. First, the backwards-bifurcating branch reverses
direction and becomes stable near Re = 200. Then, the spanwise reflection
symmetry is broken, leading to two asymmetric branches which are themselves
destabilized at Re = 420. Above this Reynolds number, time evolution leads
first to a metastable state whose spanwise wavelength is halved and then to
complicated time-dependent behavior. These features are in agreement with
experiments.
|
[{'version': 'v1', 'created': 'Mon, 8 Dec 2003 17:45:29 GMT'}]
|
2009-11-10
|
[array(['Tuckerman', 'Laurette S.', ''], dtype=object)
array(['Barkley', 'Dwight', ''], dtype=object)]
|
6,006 |
1912.08966
|
EPTCS
|
Rachid Echahed, Detlef Plump
|
Proceedings Tenth International Workshop on Graph Computation Models
| null |
EPTCS 309, 2019
|
10.4204/EPTCS.309
| null |
cs.LO cs.FL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This volume contains the post-proceedings of the Tenth International Workshop
on Graph Computation Models (GCM 2019: http://gcm2019.imag.fr). The workshop
was held in Eindhoven, The Netherlands, on July 17th, 2019, as part of STAF
2019 (Software Technologies: Applications and Foundations).
Graphs are common mathematical structures that are visual and intuitive. They
constitute a natural and seamless way for system modelling in science,
engineering and beyond, including computer science, biology, business process
modelling, etc. Graph computation models constitute a class of very high-level
models where graphs are first-class citizens. The aim of the International GCM
Workshop series is to bring together researchers interested in all aspects of
computation models based on graphs and graph transformation. It promotes the
cross-fertilizing exchange of ideas and experiences among senior and young
researchers from the different communities interested in the foundations,
applications, and implementations of graph computation models and related
areas.
These post-proceedings contain four selected papers from GCM2019 proceedings
and an invited presentation that gives an account of the very successful panel
discussion dedicated to the Analysis of Graph Transformation Systems, which
took place during the workshop and was animated by Reiko Heckel, Leen Lambers
and Maryam Ghaffari Saadat.
All submissions were subject to careful refereeing. The topics of accepted
papers include theoretical aspects of graph transformation and parsing
techniques as well as an application to model-driven engineering.
|
[{'version': 'v1', 'created': 'Thu, 19 Dec 2019 00:44:10 GMT'}]
|
2019-12-20
|
[array(['Echahed', 'Rachid', ''], dtype=object)
array(['Plump', 'Detlef', ''], dtype=object)]
|
6,007 |
2301.07864
|
Harley David Scammell Dr
|
Harley D. Scammell and Oleg P. Sushkov
|
Exciton condensation in biased bilayer graphene
| null | null | null | null |
cond-mat.mes-hall cond-mat.str-el cond-mat.supr-con
|
http://creativecommons.org/licenses/by/4.0/
|
We consider suspened bilayer graphene under applied perpendicular electric
bias field that is known to generate a single particle gap $2\Delta$ and a
related electric polarization ${\cal P}$. We argue that the bias also drives a
quantum phase transition from band insulator to superfluid exciton condensate.
The transition occurs when the exciton binding energy exceeds the band gap
$2\Delta$. We predict the critical bias (converted to band gap),
$\Delta_c\approx 60$ meV, below which the excitons condense. The critical
temperature, $T_c(\Delta)$, is maximum at $\Delta \approx 25$ meV,
$T_c^\text{max}\approx 115$ K, decreasing significantly at smaller $\Delta$ due
to thermal screening. Entering the condensate phase, the superfluid transition
is accompanied by a cusp in the electric polarization ${\cal P}(\Delta)$ at
$\Delta\to\Delta_c$, which provides a striking testable signature.
Additionally, we find that the condensate prefers to form a pair density wave.
|
[{'version': 'v1', 'created': 'Thu, 19 Jan 2023 03:19:51 GMT'}]
|
2023-01-20
|
[array(['Scammell', 'Harley D.', ''], dtype=object)
array(['Sushkov', 'Oleg P.', ''], dtype=object)]
|
6,008 |
nucl-th/0003008
|
Jose A. Pons
|
J.A. Pons, S. Reddy, P.J. Ellis, M. Prakash and J.M. Lattimer
|
Kaon Condensation in Proto-Neutron Star Matter
|
24 pages, 17 figures
|
Phys.Rev. C62 (2000) 035803
|
10.1103/PhysRevC.62.035803
| null |
nucl-th astro-ph
| null |
We study the equation of state (EOS) of kaon-condensed matter including the
effects of temperature and trapped neutrinos. It is found that the order of the
phase transition to a kaon-condensed phase, and whether or not Gibbs' rules for
phase equilibrium can be satisfied in the case of a first order transition,
depend sensitively on the choice of the kaon-nucleon interaction. The main
effect of finite temperature, for any value of the lepton fraction, is to mute
the effects of a first order transition, so that the thermodynamics becomes
similar to that of a second order transition. Above a critical temperature,
found to be at least 30--60 MeV depending upon the interaction, the first order
transition disappears. The phase boundaries in baryon density versus lepton
number and baryon density versus temperature planes are delineated. We find
that the thermal effects on the maximum gravitational mass of neutron stars are
as important as the effects of trapped neutrinos, in contrast to previously
studied cases in which the matter contained only nucleons or in which hyperons
and/or quark matter were considered. Kaon-condensed EOSs permit the existence
of metastable neutron stars, because the maximum mass of an initially hot,
lepton-rich protoneutron star is greater than that of a cold, deleptonized
neutron star. The large thermal effects imply that a metastable protoneutron
star's collapse to a black hole could occur much later than in previously
studied cases that allow metastable configurations.
|
[{'version': 'v1', 'created': 'Mon, 6 Mar 2000 21:34:41 GMT'}
{'version': 'v2', 'created': 'Thu, 17 Aug 2000 15:02:07 GMT'}]
|
2009-11-06
|
[array(['Pons', 'J. A.', ''], dtype=object)
array(['Reddy', 'S.', ''], dtype=object)
array(['Ellis', 'P. J.', ''], dtype=object)
array(['Prakash', 'M.', ''], dtype=object)
array(['Lattimer', 'J. M.', ''], dtype=object)]
|
6,009 |
2112.12365
|
Biskup Marek
|
Marek Biskup, Andrew Krieger
|
Arithmetic oscillations of the chemical distance in long-range
percolation on $\mathbb Z^d$
|
32 pages, 2 figures, typos corrected, proofs expanded
| null | null | null |
math.PR math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a long-range percolation graph on $\mathbb Z^d$ where, in
addition to the nearest-neighbor edges of $\mathbb Z^d$, distinct
$x,y\in\mathbb Z^d$ are connected by an edge independently with probability
asymptotic to $\beta|x-y|^{-s}$, for $s\in(d,2d)$, $\beta>0$ and $|\cdot|$ a
norm on $\mathbb R^d$. We first show that, for all but a countably many
$\beta>0$, the graph-theoretical (a.k.a. chemical) distance between typical
vertices at $|\cdot|$-distance $r$ is, with high probability as $r\to\infty$,
asymptotic to $\phi_\beta(r)(\log r)^\Delta$, where $\Delta^{-1}:=\log_2(2d/s)$
and $\phi_\beta$ is a positive, bounded and continuous function subject to
$\phi_\beta(r^\gamma)=\phi_\beta(r)$ for $\gamma:=s/(2d)$. The proof parallels
that in a continuum version of the model where a similar scaling was shown
earlier by the first author and J. Lin. This work also conjectured that
$\phi_\beta$ is constant which we show to be false by proving that
$(\log\beta)^\Delta\phi_\beta$ tends, as $\beta\to\infty$, to a non-constant
limit which is independent of the specifics of the model. The proof reveals
arithmetic rigidity of the shortest paths that maintain a hierarchical (dyadic)
structure all the way to unit scales.
|
[{'version': 'v1', 'created': 'Thu, 23 Dec 2021 05:16:53 GMT'}
{'version': 'v2', 'created': 'Sat, 2 Apr 2022 00:44:38 GMT'}]
|
2022-04-05
|
[array(['Biskup', 'Marek', ''], dtype=object)
array(['Krieger', 'Andrew', ''], dtype=object)]
|
6,010 |
1904.01592
|
Sudeb Ranajn Datta
|
Sudeb Ranjan Datta and Banibrata Mukhopadhyay
|
Nucleosynthesis in advective disc and outflow: possible explanation for
overabundances in winds from X-ray binaries
|
12 pages, 14 figures, 2 tables, Accepted for publication in MNRAS
| null |
10.1093/mnras/stz952
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Multiple spectroscopic lines of different elements observed in winds from
X-ray binaries (XRBs), based on one zone model, indicate super-solar abundance
of elements, e.g. Mg, Si, S, Ar, Ca, Cr, Mn, Co. The one zone model considers
similar hydrodynamics of underlying winds. In order to find a possible origin
of these overabundances, we explore nucleosynthesis in advective, geometrically
thick, sub-Keplerian, accretion disc in XRBs and active galactic nuclei (AGNs),
and further in outflows launched from the disc. Based on flow hydrodynamics and
solving nuclear network code therein by semi-implicit Euler method, we obtain
abundance evolution of the elements. Although the density is very low, due to
very high temperature of advective disc than Keplerian Shakura-Sunyaev disc
(SSD), it is quite evident that significant nucleosynthesis occurs in the
former. As the temperature at the base of the outflow is constrained by the
temperature of disc, nucleosynthesis also occurs in the outflow contingent upon
its launching temperature. Till now, the outer region of XRB and AGN discs is
understood to be colder SSD and inner region to be advective disc, together
forming a disc-wind system. Hence, newly evolved abundances after processing
through outflow can change the abundances of different elements present in the
environment of the whole disc-wind system. We find 2-6 times overabundant Mg,
Si, Ar, Cr with respect to the respective solar abundances, which is consistent
observationally. Thus for most XRBs, when only iron lines are present,
inclusion of these evolved abundances is expected to change the observational
analysis drastically.
|
[{'version': 'v1', 'created': 'Tue, 2 Apr 2019 18:00:04 GMT'}]
|
2019-04-04
|
[array(['Datta', 'Sudeb Ranjan', ''], dtype=object)
array(['Mukhopadhyay', 'Banibrata', ''], dtype=object)]
|
6,011 |
1203.1363
|
Lulu Li
|
Lulu Li, Jie Meng, P. Ring, En-Guang Zhao, Shan-Gui Zhou
|
Odd systems in deformed relativistic Hartree Bogoliubov theory in
continuum
|
4 pages, 3 figures; Chin. Phys. Lett., in press
|
Chin. Phys. Lett. 29 (2012) 042101
|
10.1088/0256-307X/29/4/042101
| null |
nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In order to describe the exotic nuclear structure in unstable odd-$A$ or
odd-odd nuclei, the deformed relativistic Hartree Bogoliubov theory in
continuum has been extended to incorporate the blocking effect due to the odd
nucleon. For a microscopic and self-consistent description of pairing
correlations, continuum, deformation, blocking effects, and the extended
spatial density distribution in exotic nuclei, the deformed relativistic
Hartree Bogoliubov equations are solved in a Woods-Saxon basis in which the
radial wave functions have a proper asymptotic behavior at large $r$. The
formalism and numerical details are provided. The code is checked by comparing
the results with those of spherical relativistic continuum Hartree Bogoliubov
theory in the nucleus $^{19}$O. The prolate deformed nucleus $^{15}$C is
studied by examining the neutron levels and density distributions.
|
[{'version': 'v1', 'created': 'Wed, 7 Mar 2012 01:17:12 GMT'}
{'version': 'v2', 'created': 'Thu, 8 Mar 2012 06:32:04 GMT'}]
|
2012-05-04
|
[array(['Li', 'Lulu', ''], dtype=object)
array(['Meng', 'Jie', ''], dtype=object)
array(['Ring', 'P.', ''], dtype=object)
array(['Zhao', 'En-Guang', ''], dtype=object)
array(['Zhou', 'Shan-Gui', ''], dtype=object)]
|
6,012 |
1606.06452
|
Mihalis Psarakis
|
Mihalis Psarakis
|
Reliability-Aware Overlay Architectures for FPGAs: Features and Design
Challenges
|
Presented at 2nd International Workshop on Overlay Architectures for
FPGAs (OLAF 2016) arXiv:1605.08149
| null | null |
OLAF/2016/04
|
cs.AR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The FPGA overlay architectures have been mainly proposed to improve design
productivity, circuit portability and system debugging. In this paper, we
address the use of overlay architectures for building fault tolerant SRAM-based
FPGA systems and discuss the main features and design challenges of a
reliability-aware overlay architecture.
|
[{'version': 'v1', 'created': 'Tue, 21 Jun 2016 07:25:05 GMT'}]
|
2016-06-22
|
[array(['Psarakis', 'Mihalis', ''], dtype=object)]
|
6,013 |
0812.4977
|
Grzegorz Karch
|
Ahmad Fino and Grzegorz Karch
|
Decay of mass for nonlinear equation with fractional Laplacian
| null | null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The large time behavior of nonnegative solutions to the reaction-diffusion
equation $\partial_t u=-(-\Delta)^{\alpha/2}u - u^p,$ $(\alpha\in(0,2], p>1)$
posed on $\mathbb{R}^N$ and supplemented with an integrable initial condition
is studied. We show that the anomalous diffusion term determines the large time
asymptotics for $p>1+{\alpha}/{N},$ while nonlinear effects win if
$p\leq1+{\alpha}/{N}.$
|
[{'version': 'v1', 'created': 'Mon, 29 Dec 2008 21:45:10 GMT'}]
|
2008-12-31
|
[array(['Fino', 'Ahmad', ''], dtype=object)
array(['Karch', 'Grzegorz', ''], dtype=object)]
|
6,014 |
0912.5502
|
Serguei Mokhov
|
Serguei A. Mokhov, Miao Song and Ching Y. Suen
|
Writer Identification Using Inexpensive Signal Processing Techniques
|
9 pages; 1 figure; presented at CISSE'09 at
http://conference.cisse2009.org/proceedings.aspx ; includes the the
application source code; based on MARF described in arXiv:0905.1235
| null |
10.1007/978-90-481-9112-3_74
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose to use novel and classical audio and text signal-processing and
otherwise techniques for "inexpensive" fast writer identification tasks of
scanned hand-written documents "visually". The "inexpensive" refers to the
efficiency of the identification process in terms of CPU cycles while
preserving decent accuracy for preliminary identification. This is a
comparative study of multiple algorithm combinations in a pattern recognition
pipeline implemented in Java around an open-source Modular Audio Recognition
Framework (MARF) that can do a lot more beyond audio. We present our
preliminary experimental findings in such an identification task. We simulate
"visual" identification by "looking" at the hand-written document as a whole
rather than trying to extract fine-grained features out of it prior
classification.
|
[{'version': 'v1', 'created': 'Wed, 30 Dec 2009 18:19:53 GMT'}]
|
2010-06-29
|
[array(['Mokhov', 'Serguei A.', ''], dtype=object)
array(['Song', 'Miao', ''], dtype=object)
array(['Suen', 'Ching Y.', ''], dtype=object)]
|
6,015 |
1812.01921
|
C\'elia Borlido
|
C\'elia Borlido and Mai Gehrke and Andreas Krebs and Howard Straubing
|
Difference hierarchies and duality with an application to formal
languages
|
31 pages
| null | null | null |
math.GN cs.FL math.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The notion of a difference hierarchy, first introduced by Hausdorff, plays an
important role in many areas of mathematics, logic and theoretical computer
science such as descriptive set theory, complexity theory, and the theory of
regular languages and automata. From a lattice theoretic point of view, the
difference hierarchy over a bounded distributive lattice stratifies the Boolean
algebra generated by it according to the minimum length of difference chains
required to describe the Boolean elements. While each Boolean element is given
by a finite difference chain, there is no canonical such writing in general. We
show that, relative to the filter completion, or equivalently, the lattice of
closed upsets of the dual Priestley space, each Boolean element over the
lattice has a canonical minimum length decomposition into a Hausdorff
difference. As a corollary each Boolean element over a (co-)Heyting algebra has
a canonical difference chain. With a further generalization of this result
involving a directed family of adjunctions with meet-semilattices, we give an
elementary proof of the fact that a regular language is given by a Boolean
combination of purely universal sentences using arbitrary numerical predicates
if and only if it is given by a Boolean combination of purely universal
sentences using only regular numerical predicates.
|
[{'version': 'v1', 'created': 'Wed, 5 Dec 2018 11:22:26 GMT'}]
|
2018-12-06
|
[array(['Borlido', 'Célia', ''], dtype=object)
array(['Gehrke', 'Mai', ''], dtype=object)
array(['Krebs', 'Andreas', ''], dtype=object)
array(['Straubing', 'Howard', ''], dtype=object)]
|
6,016 |
2203.04359
|
Tomer Dollberg
|
Tomer Dollberg, Juan Carlos Andresen and Moshe Schechter
|
The Effect of Intrinsic Quantum Fluctuations on the Phase Diagram of
Anisotropic Dipolar Magnets
|
5+8 pages, 5+5 figures; added argument to results section, corrected
typos
|
Phys. Rev. B 105, L180413 (2022)
|
10.1103/PhysRevB.105.L180413
| null |
cond-mat.str-el cond-mat.dis-nn
|
http://creativecommons.org/licenses/by/4.0/
|
The rare-earth material $\mathrm{LiHoF_4}$ is believed to be an experimental
realization of the celebrated (dipolar) Ising model, and upon the inclusion of
a transverse field $B_x$, an archetypal quantum Ising model. Moreover, by
substituting the magnetic Ho ions by non-magnetic Y ions, disorder can be
introduced into the system giving rise to a dipolar disordered magnet and at
high disorders to a spin-glass. Indeed, this material has been scrutinized
experimentally, numerically and theoretically over many decades with the aim of
understanding various collective magnetic phenomena. One of the to-date open
questions is the discrepancy between the experimental and theoretical $B_x -T$
phase diagram at low-fields and high temperatures. Here we propose a mechanism,
backed by numerical results, that highlights the importance of quantum
fluctuations induced by the off-diagonal dipolar terms, in determining the
critical temperature of anisotropic dipolar magnets in the presence and in the
absence of a transverse field. We thus show that the description as a simple
Ising system is insufficient to quantitatively describe the full phase diagram
of $\mathrm{LiHoF_4}$, for the pure as well as for the dilute system.
|
[{'version': 'v1', 'created': 'Tue, 8 Mar 2022 19:33:17 GMT'}
{'version': 'v2', 'created': 'Fri, 27 May 2022 07:59:02 GMT'}]
|
2022-05-30
|
[array(['Dollberg', 'Tomer', ''], dtype=object)
array(['Andresen', 'Juan Carlos', ''], dtype=object)
array(['Schechter', 'Moshe', ''], dtype=object)]
|
6,017 |
1102.3179
|
Charles Riedel II
|
C. Jess Riedel, Wojciech H. Zurek
|
Redundant Information from Thermal Illumination: Quantum Darwinism in
Scattered Photons
|
23 pages, 7 figures
|
New J. Phys. 13 (2011) 073038
|
10.1088/1367-2630/13/7/073038
|
LAUR-11-00041
|
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study quantum Darwinism, the redundant recording of information about the
preferred states of a decohering system by its environment, for an object
illuminated by a blackbody. We calculate the quantum mutual information between
the object and its photon environment for blackbodies that cover an arbitrary
section of the sky. In particular, we demonstrate that more extended sources
have a reduced ability to create redundant information about the system, in
agreement with previous evidence that initial mixedness of an environment
slows---but does not stop---the production of records. We also show that the
qualitative results are robust for more general initial states of the system.
|
[{'version': 'v1', 'created': 'Tue, 15 Feb 2011 20:54:03 GMT'}
{'version': 'v2', 'created': 'Wed, 11 May 2011 22:50:29 GMT'}
{'version': 'v3', 'created': 'Mon, 19 Sep 2011 19:51:37 GMT'}]
|
2011-09-20
|
[array(['Riedel', 'C. Jess', ''], dtype=object)
array(['Zurek', 'Wojciech H.', ''], dtype=object)]
|
6,018 |
2111.01579
|
Shilei Fan
|
Shilei Fan, Lingmin Liao, Hongmin Nie and Yuefei Wang
|
Julia sets and geometrically finite maps over finite extensions of the
$p$-adic field
|
35 pages, 1 figure
| null | null | null |
math.DS math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $K$ be a finite extension of the field $\mathbb{Q}_p$ of $p$-adic
numbers, and $\phi\in K(z)$ be a rational map of degree at least $2$. We prove
that the $K$-Julia set of $\phi$ is the natural restriction of
$\mathbb{C}_p$-Julia set, provided that the critical orbits are well-behaved.
Moreover, under further assumption that $\phi$ is geometrically finite, we
prove that the dynamics on the $K$-Julia set of $\phi$ is a countable state
Markov shift.
|
[{'version': 'v1', 'created': 'Tue, 2 Nov 2021 13:08:05 GMT'}]
|
2021-11-03
|
[array(['Fan', 'Shilei', ''], dtype=object)
array(['Liao', 'Lingmin', ''], dtype=object)
array(['Nie', 'Hongmin', ''], dtype=object)
array(['Wang', 'Yuefei', ''], dtype=object)]
|
6,019 |
solv-int/9902001
|
Takeo Kojima
|
N. Fukushima (Waseda Univ.), T. Kojima (Nihon Univ.)
|
Spontaneous polarization of the Kondo problem associated with the
higher-spin six-vertex model
|
25 pages, LaTEX2e
|
J.Phys.A:Math.Gen.32,(1999) 6149-6168
|
10.1088/0305-4470/32/34/304
| null |
solv-int hep-th nlin.SI
| null |
We study the multi-channel Kondo model associated with an integrable
higher-spin analogue of the anti-ferroelectric six-vertex model, which is
constructed by inserting spin 1/2 to spin 1 lines: $... C^3 \otimes C^3 \otimes
C^2 \otimes C^3 \otimes C^3 ... $. We formulate the problem in terms of
representation theory of quantum affine algebra $U_q(hat{sl}_2)$. We derive an
exact formula for the spontaneous staggered polarization for our model, which
corresponds to Baxter`s formula for the six-vertex model.
|
[{'version': 'v1', 'created': 'Sat, 30 Jan 1999 03:25:57 GMT'}
{'version': 'v2', 'created': 'Sat, 28 Aug 1999 07:11:15 GMT'}]
|
2009-10-31
|
[array(['Fukushima', 'N.', '', 'Waseda Univ.'], dtype=object)
array(['Kojima', 'T.', '', 'Nihon Univ.'], dtype=object)]
|
6,020 |
0911.0031
|
Sebastien Tanzilli
|
K. Thyagarajan, K. Sinha, J. Lugani, S. Ghosh, A. Martin, D. B.
Ostrowsky, O. Alibart, and S. Tanzilli
|
Generation of polarization entangled photons using type-II doubly
periodically poled lithium niobate waveguides
|
9 pages, 5 figures, 2 tables
|
Phys. Rev. A 80, 052321 (2009)
|
10.1103/PhysRevA.80.052321
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we address the issue of the generation of non-degenerate
cross-polarization-entangled photon pairs using type-II periodically poled
lithium niobate. We show that, by an appropriate engineering of the
quasi-phase-matching grating, it is possible to simultaneously satisfy the
conditions for two spontaneous parametric down-conversion processes, namely
ordinary pump photon down-conversion to either extraordinary signal and
ordinary idler paired photons, or to ordinary signal and extraordinary idler
paired photons. In contrast to single type-II phase-matching, these two
processes, when enabled together, can lead to the direct production of
cross-polarization-entangled state for non degenerate signal and idler
wavelengths. Such a scheme should be of great interest in applications
requiring polarization-entangled non degenerate paired photons with, for
instance, one of the entangled photons at an appropriate wavelength being used
for local operation or for quantum storage in an atomic ensemble, and the other
one at the typical wavelength of 1550 nm for propagation through an optical
fiber.
|
[{'version': 'v1', 'created': 'Fri, 30 Oct 2009 22:16:23 GMT'}
{'version': 'v2', 'created': 'Tue, 29 Dec 2009 20:45:17 GMT'}]
|
2012-01-10
|
[array(['Thyagarajan', 'K.', ''], dtype=object)
array(['Sinha', 'K.', ''], dtype=object)
array(['Lugani', 'J.', ''], dtype=object)
array(['Ghosh', 'S.', ''], dtype=object)
array(['Martin', 'A.', ''], dtype=object)
array(['Ostrowsky', 'D. B.', ''], dtype=object)
array(['Alibart', 'O.', ''], dtype=object)
array(['Tanzilli', 'S.', ''], dtype=object)]
|
6,021 |
2012.05057
|
Ning Wang
|
Ning Wang and Wengang Zhou and Houqiang Li
|
Contrastive Transformation for Self-supervised Correspondence Learning
|
To appear in AAAI 2021
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we focus on the self-supervised learning of visual
correspondence using unlabeled videos in the wild. Our method simultaneously
considers intra- and inter-video representation associations for reliable
correspondence estimation. The intra-video learning transforms the image
contents across frames within a single video via the frame pair-wise affinity.
To obtain the discriminative representation for instance-level separation, we
go beyond the intra-video analysis and construct the inter-video affinity to
facilitate the contrastive transformation across different videos. By forcing
the transformation consistency between intra- and inter-video levels, the
fine-grained correspondence associations are well preserved and the
instance-level feature discrimination is effectively reinforced. Our simple
framework outperforms the recent self-supervised correspondence methods on a
range of visual tasks including video object tracking (VOT), video object
segmentation (VOS), pose keypoint tracking, etc. It is worth mentioning that
our method also surpasses the fully-supervised affinity representation (e.g.,
ResNet) and performs competitively against the recent fully-supervised
algorithms designed for the specific tasks (e.g., VOT and VOS).
|
[{'version': 'v1', 'created': 'Wed, 9 Dec 2020 14:05:06 GMT'}]
|
2020-12-10
|
[array(['Wang', 'Ning', ''], dtype=object)
array(['Zhou', 'Wengang', ''], dtype=object)
array(['Li', 'Houqiang', ''], dtype=object)]
|
6,022 |
hep-th/0112234
|
Victor Gershun
|
V. D. Gershun
|
Bihamiltonian approach to the closed string model in the background
fields
|
8 pages, espcrs2 style, to be appear in the Proceedings of the
International Workshop "Supersymmetries and Quantum symmetries"(September
2001, Karpach, Poland)
| null | null | null |
hep-th
| null |
The closed string model in the background gravity field and the antisymmetric
B-field is considered as the bihamiltonian system in assumption,that string
model is the integrable model for particular kind of the background fields. It
is shown, that bihamiltonity is origin of two types of the T-duality of the
closed string models. The dual nonlocal Poisson brackets, depending of the
background fields and of their derivatives, are obtained. The integrability
condition is formulated as the compatibility of the bihamoltonity condition and
the Jacobi identity of the dual Poisson bracket. It is shown, that the dual
brackets and dual hamiltonians can be obtained from the canonical (PB) and from
the initial hamiltonian by imposing of the second kind constraints on the
initial dynamical system, on the closed string model in the constant background
fields, as example. The closed string model in the constant background fields
is considered without constraints, with the second kind constraints and with
first kind constraints as the B-chiral string. The two particles discrete
closed string model is considered as two relativistic particle system to show
the difference between the Gupta-Bleuler method of the quantization with the
first kind constraints and the quantization of the Dirac bracket with the
second kind constraints.
|
[{'version': 'v1', 'created': 'Tue, 25 Dec 2001 14:37:43 GMT'}]
|
2007-05-23
|
[array(['Gershun', 'V. D.', ''], dtype=object)]
|
6,023 |
1304.7636
|
Nicolas Laflorencie
|
Juan Pablo \'Alvarez Z\'u\~niga, Nicolas Laflorencie
|
Bose glass transition and spin-wave localization for 2D bosons in a
random potential
| null |
Phys. Rev. Lett. 111, 160403 (2013)
|
10.1103/PhysRevLett.111.160403
| null |
cond-mat.str-el cond-mat.dis-nn cond-mat.quant-gas cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A spin-wave approach of the zero temperature superfluid-insulator transition
for two-dimensional hard-core bosons in a random potential $\mu=\pm$ W is
developed. While at the classical level there is no intervening phase between
the Bose-condensed superfluid (SF) and the gapped disordered insulator, the
introduction of quantum fluctuations leads to a much richer physics. Upon
increasing the disorder strength W, the Bose-condensed fraction disappears
first, before the SF. Then a gapless Bose-glass phase emerges over a finite
region until the insulator appears. Furthermore, in the strongly disordered SF
regime, a mobility edge in the spin-wave excitation spectrum is found at a
finite frequency $\Omega_c$ decreasing with W, and presumably vanishing in the
Bose-glass phase.
|
[{'version': 'v1', 'created': 'Mon, 29 Apr 2013 12:17:34 GMT'}
{'version': 'v2', 'created': 'Fri, 18 Oct 2013 08:26:53 GMT'}]
|
2013-10-21
|
[array(['Zúñiga', 'Juan Pablo Álvarez', ''], dtype=object)
array(['Laflorencie', 'Nicolas', ''], dtype=object)]
|
6,024 |
2112.12620
|
Dion Gijswijt
|
Dion Gijswijt
|
Excluding affine configurations over a finite field
|
21 pages Changes to v1: typos fixed, additional explanation added
| null | null | null |
math.CO math.NT
|
http://creativecommons.org/licenses/by/4.0/
|
Let $a_{i1}x_1+\cdots+a_{ik}x_k=0$, $i\in[m]$ be a balanced homogeneous
system of linear equations with coefficients $a_{ij}$ from a finite field
$\mathbb{F}_q$. We say that a solution $x=(x_1,\ldots, x_k)$ with $x_1,\ldots,
x_k\in \mathbb{F}_q^n$ is `generic' if every homogeneous balanced linear
equation satisfied by $x$ is a linear combination of the given equations.
We show that if the given system is `tame', subsets $S\subseteq
\mathbb{F}_q^n$ without generic solutions must have exponentially small
density. Here, the system is called tame if for every implied system the number
of equations is less than half the number of used variables. Using a subspace
sampling argument this also gives a `supersaturation result': there is a
constant $c$ such that for $\epsilon>0$ sufficiently small, every subset
$S\subseteq \mathbb{F}_q^n$ of size at least $q^{(1-\epsilon) n}$ contains
$\Omega(q^{(k-m-\epsilon c)n})$ solutions as $n\to\infty$. For $q<4$ the
tameness condition can be left out.
Our main tool is a modification of the slice rank method to leverage the
existence of many solutions in order to obtain high rank solutions.
|
[{'version': 'v1', 'created': 'Thu, 23 Dec 2021 15:01:00 GMT'}
{'version': 'v2', 'created': 'Mon, 4 Apr 2022 09:45:43 GMT'}]
|
2022-04-05
|
[array(['Gijswijt', 'Dion', ''], dtype=object)]
|
6,025 |
1108.5371
|
Martin J. Savage
|
Zohreh Davoudi and Martin J. Savage
|
Improving the Volume Dependence of Two-Body Binding Energies Calculated
with Lattice QCD
|
12 pages, 7 figs, v2 - typos fixed
| null |
10.1103/PhysRevD.84.114502
|
NT@UW-11-19
|
hep-lat hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Volume modifications to the binding of two-body systems in large cubic
volumes of extent L depend upon the total momentum and exponentially upon the
ratio of L to the size of the boosted system. Recent work by Bour et al
determined the momentum dependence of the leading volume modifications to
nonrelativistic systems with periodic boundary conditions imposed on the
single-particle wavefunctions, enabling them to numerically determine the
scattering of such bound states using a low-energy effective field theory and
Luscher's finite-volume method. The calculation of bound nuclear systems
directly from QCD using Lattice QCD has begun, and it is important to reduce
the systematic uncertainty introduced into such calculations by the finite
spatial extent of the gauge-field configurations. We extend the work of Bour et
al from nonrelativistic quantum mechanics to quantum field theory by
generalizing the work of Luscher and of Gottlieb and Rummukainen to boosted
two-body bound states. The volume modifications to binding energies can be
exponentially reduced from ~ e^{-kappa L}/L to ~ e^{-2 kappa L}/L in
nonrelativistic systems (where kappa is the binding momentum of the state) by
forming particular combinations of the binding energies determined in the four
lowest-lying boosted systems. Relativistic corrections to this combination, and
others, that violate the exponential reduction are determined. An analysis of
what can be expected from Lattice QCD calculations of the deuteron is
performed, the results of which are representative of a generic loosely bound
system.
|
[{'version': 'v1', 'created': 'Fri, 26 Aug 2011 19:08:53 GMT'}
{'version': 'v2', 'created': 'Fri, 30 Sep 2011 15:33:27 GMT'}]
|
2013-05-29
|
[array(['Davoudi', 'Zohreh', ''], dtype=object)
array(['Savage', 'Martin J.', ''], dtype=object)]
|
6,026 |
2305.17349
|
Christos Sakaridis
|
Christos Sakaridis, David Bruggemann, Fisher Yu, Luc Van Gool
|
Condition-Invariant Semantic Segmentation
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Adaptation of semantic segmentation networks to different visual conditions
from those for which ground-truth annotations are available at training is
vital for robust perception in autonomous cars and robots. However, previous
work has shown that most feature-level adaptation methods, which employ
adversarial training and are validated on synthetic-to-real adaptation, provide
marginal gains in normal-to-adverse condition-level adaptation, being
outperformed by simple pixel-level adaptation via stylization. Motivated by
these findings, we propose to leverage stylization in performing feature-level
adaptation by aligning the deep features extracted by the encoder of the
network from the original and the stylized view of each input image with a
novel feature invariance loss. In this way, we encourage the encoder to extract
features that are invariant to the style of the input, allowing the decoder to
focus on parsing these features and not on further abstracting from the
specific style of the input. We implement our method, named Condition-Invariant
Semantic Segmentation (CISS), on the top-performing domain adaptation
architecture and demonstrate a significant improvement over previous
state-of-the-art methods both on Cityscapes$\to$ACDC and Cityscapes$\to$Dark
Zurich adaptation. In particular, CISS is ranked first among all published
unsupervised domain adaptation methods on the public ACDC leaderboard. Our
method is also shown to generalize well to domains unseen during training,
outperforming competing domain adaptation approaches on BDD100K-night and
Nighttime Driving. Code is publicly available at https://github.com/SysCV/CISS .
|
[{'version': 'v1', 'created': 'Sat, 27 May 2023 03:05:07 GMT'}]
|
2023-05-30
|
[array(['Sakaridis', 'Christos', ''], dtype=object)
array(['Bruggemann', 'David', ''], dtype=object)
array(['Yu', 'Fisher', ''], dtype=object)
array(['Van Gool', 'Luc', ''], dtype=object)]
|
6,027 |
2109.12213
|
Stefan Wild
|
Raghu Bollapragada and Stefan M. Wild
|
Adaptive Sampling Quasi-Newton Methods for Zeroth-Order Stochastic
Optimization
| null | null | null | null |
math.OC cs.AI stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider unconstrained stochastic optimization problems with no available
gradient information. Such problems arise in settings from derivative-free
simulation optimization to reinforcement learning. We propose an adaptive
sampling quasi-Newton method where we estimate the gradients of a stochastic
function using finite differences within a common random number framework. We
develop modified versions of a norm test and an inner product quasi-Newton test
to control the sample sizes used in the stochastic approximations and provide
global convergence results to the neighborhood of the optimal solution. We
present numerical experiments on simulation optimization problems to illustrate
the performance of the proposed algorithm. When compared with classical
zeroth-order stochastic gradient methods, we observe that our strategies of
adapting the sample sizes significantly improve performance in terms of the
number of stochastic function evaluations required.
|
[{'version': 'v1', 'created': 'Fri, 24 Sep 2021 21:49:25 GMT'}]
|
2021-09-28
|
[array(['Bollapragada', 'Raghu', ''], dtype=object)
array(['Wild', 'Stefan M.', ''], dtype=object)]
|
6,028 |
nucl-th/9211002
| null |
L. Frankfurt, W. R. Greenberg, G. A. Miller, M. Strikman
|
Sum Rule Description of Color Transparency
|
22 pages + 3 postscript figures attached
|
Phys.Rev.C46:2547-2553,1992
|
10.1103/PhysRevC.46.2547
|
U.WA. Report 40427-25-N92
|
nucl-th
| null |
The assumption that a small point-like configuration does not interact with
nucleons leads to a new set of sum rules that are interpreted as models of the
baryon-nucleon interaction. These models are rendered semi-realistic by
requiring consistency with data for cross section fluctuations in proton-proton
diffractive collisions.
|
[{'version': 'v1', 'created': 'Tue, 3 Nov 1992 20:49:47 GMT'}]
|
2008-11-26
|
[array(['Frankfurt', 'L.', ''], dtype=object)
array(['Greenberg', 'W. R.', ''], dtype=object)
array(['Miller', 'G. A.', ''], dtype=object)
array(['Strikman', 'M.', ''], dtype=object)]
|
6,029 |
cond-mat/0304527
|
Peter O. Fedichev
|
P.O. Fedichev, M.J. Bijlsma, and P. Zoller
|
Extended molecules and geometric scattering resonances in optical
lattices
|
4 pages, 1 figure, RevTeX
| null |
10.1103/PhysRevLett.92.080401
| null |
cond-mat.soft
| null |
We develop a theory describing neutral atoms scattering at low energies in an
optical lattice. We show that for a repulsive interaction, as the microscopic
scattering length increases, the effective scattering amplitude approaches a
limiting value which depends only on the lattice parameters. In the case of
attractive interaction a geometric resonance occurs before reaching this limit.
Close to the resonance, the effective interaction becomes repulsive and
supports a weakly bound state, which can extend over several lattice sites.
|
[{'version': 'v1', 'created': 'Wed, 23 Apr 2003 16:50:14 GMT'}]
|
2009-11-10
|
[array(['Fedichev', 'P. O.', ''], dtype=object)
array(['Bijlsma', 'M. J.', ''], dtype=object)
array(['Zoller', 'P.', ''], dtype=object)]
|
6,030 |
1803.01397
|
Gustavo Ara\'ujo
|
Gustavo Ara\'ujo, Kleber C\^amara
|
Universal bounds for the Hardy--Littlewood inequalities on multilinear
forms
| null | null | null | null |
math.FA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Hardy--Littlewood inequalities for multilinear forms on sequence spaces
state that for all positive integers $m,n\geq2$ and all $m$-linear forms
$T:\ell_{p_{1}}^{n}\times\cdots\times\ell_{p_{m}}^{n}\rightarrow\mathbb{K}$
($\mathbb{K}=\mathbb{R}$ or $\mathbb{C}$) there are constants $C_{m}\geq1$ (not
depending on $n$) such that \[ \left( \sum_{j_{1},\ldots,j_{m}=1}^{n}\left\vert
T(e_{j_{1}},\ldots,e_{j_{m}})\right\vert ^{\rho}\right) ^{\frac{1}{\rho}}\leq
C_{m}\sup_{\left\Vert x_{1}\right\Vert ,\dots,\left\Vert x_{m}\right\Vert \leq
1}\left\vert T(x_{1},\dots,x_{m})\right\vert, \] where
$\rho=\frac{2m}{m+1-2\left( \frac{1}{p_{1}}+\cdots+\frac{1}{p_{m}}\right) }$ if
$0\leq\frac{1}{p_{1}}+\cdots+\frac{1}{p_{m}}\leq\frac{1}{2}$ or
$\rho=\frac{1}{1-\left( \frac{1}{p_{1}}+\cdots+\frac{1}{p_{m}}\right)}$ if
$\frac{1}{2}\leq\frac{1}{p_{1}}+\cdots+\frac{1}{p_{m}}<1$. Good estimates for
the Hardy-Littlewood constants are, in general, associated to applications in
Mathematics and even in Physics, but the exact behavior of these constants is
still unknown. In this note we give some new contributions to the behavior of
the constants in the case
$\frac{1}{2}\leq\frac{1}{p_{1}}+\cdots+\frac{1}{p_{m}}<1$. As a consequence of
our main result, we present a generalization and a simplified proof of a result
due to Aron et al. on certain Hardy--Littlewood type inequalities.
|
[{'version': 'v1', 'created': 'Sun, 4 Mar 2018 18:23:07 GMT'}]
|
2018-03-06
|
[array(['Araújo', 'Gustavo', ''], dtype=object)
array(['Câmara', 'Kleber', ''], dtype=object)]
|
6,031 |
0902.3545
|
Ursula Schr\"oter
|
Ursula Schroeter, Elke Scheer
|
Transport Channels in a Double Junction- coherent coupling changes the
picture
|
22 pages, 5 figures, many number examples. Considerations on a rather
elementary basis. Problem becomes clear in view of references [10-12] and
[16]
| null | null | null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Transport through a point contact is accurately modelled by assigning to the
junction an ensemble of independent transport channels with possibly different
transmissions. We here argue that for a series of two contacts, coherently
coupled across an island, the transport channels are different from the
ensembles that would describe each contact taken as stand-alone device. We
further show that instead of two sets of channels with manifold cross-links
over the island the double junction can be described by pairs of channels from
both sides coherently coupled together, where each pair, however, has no
coherent connection to the others. This finding will substantially simplify
modelling transport by a Green's functions technique. Additional channels
through only one junction may complete the picture. Finally we discuss how
partial coherence across the island with an appropriate ansatz can be modelled
in the same scheme.
|
[{'version': 'v1', 'created': 'Fri, 20 Feb 2009 10:36:18 GMT'}]
|
2009-02-23
|
[array(['Schroeter', 'Ursula', ''], dtype=object)
array(['Scheer', 'Elke', ''], dtype=object)]
|
6,032 |
2101.08765
|
Shulei Wang
|
Shulei Wang
|
Robust Differential Abundance Test in Compositional Data
| null | null | null | null |
stat.ME math.ST q-bio.QM stat.AP stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Differential abundance tests in compositional data are essential and
fundamental tasks in various biomedical applications, such as single-cell, bulk
RNA-seq, and microbiome data analysis. However, because of the compositional
constraint and the prevalence of zero counts in the data, differential
abundance analysis in compositional data remains a complicated and unsolved
statistical problem. This study introduces a new differential abundance test,
the robust differential abundance (RDB) test, to address these challenges.
Compared with existing methods, the RDB test is simple and computationally
efficient, is robust to prevalent zero counts in compositional datasets, can
take the data's compositional nature into account, and has a theoretical
guarantee of controlling false discoveries in a general setting. Furthermore,
in the presence of observed covariates, the RDB test can work with the
covariate balancing techniques to remove the potential confounding effects and
draw reliable conclusions. Finally, we apply the new test to several numerical
examples using simulated and real datasets to demonstrate its practical merits.
|
[{'version': 'v1', 'created': 'Thu, 21 Jan 2021 18:37:24 GMT'}
{'version': 'v2', 'created': 'Tue, 20 Jul 2021 19:27:04 GMT'}
{'version': 'v3', 'created': 'Tue, 12 Apr 2022 23:31:22 GMT'}]
|
2022-04-14
|
[array(['Wang', 'Shulei', ''], dtype=object)]
|
6,033 |
1006.1771
|
Roeland Geurts
|
M. V. Milo\v{s}evi\'c and R. Geurts
|
The Ginzburg-Landau theory in application
|
To be published in Physica C, VORTEX VI Conference Proceedings
| null |
10.1016/j.physc.2010.02.056
| null |
cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A numerical approach to Ginzburg-Landau (GL) theory is demonstrated and we
review its applications to several examples of current interest in the research
on superconductivity. This analysis also shows the applicability of the
two-dimensional approach to thin superconductors and the re-defined effective
GL parameter kappa. For two-gap superconductors, the conveniently written GL
equations directly show that the magnetic behavior of the sample depends not
just on the GL parameter of two bands, but also on the ratio of respective
coherence lengths.
|
[{'version': 'v1', 'created': 'Wed, 9 Jun 2010 11:47:56 GMT'}
{'version': 'v2', 'created': 'Thu, 10 Jun 2010 12:12:43 GMT'}]
|
2016-08-14
|
[array(['Milošević', 'M. V.', ''], dtype=object)
array(['Geurts', 'R.', ''], dtype=object)]
|
6,034 |
1105.5222
|
Dao Tien Khoa
|
Doan Thi Loan, Ngo Hai Tan, Dao T. Khoa, and Jerome Margueron
|
Equation of state of the neutron star matter, and the nuclear symmetry
energy
|
To be published in Physical Review C
|
Phys.Rev.C83:065809,2011
|
10.1103/PhysRevC.83.065809
| null |
nucl-th astro-ph.HE nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The nuclear mean-field potentials obtained in the Hartree-Fock method with
different choices of the in-medium nucleon-nucleon (NN) interaction have been
used to study the equation of state (EOS) of the neutron star (NS) matter. The
EOS of the uniform NS core has been calculated for the np$e\mu$ composition in
the $\beta$-equilibrium at zero temperature, using version Sly4 of the Skyrme
interaction as well as two density-dependent versions of the finite-range M3Y
interaction (CDM3Y$n$ and M3Y-P$n$), and versions D1S and D1N of the Gogny
interaction. Although the considered effective NN interactions were proven to
be quite realistic in numerous nuclear structure and/or reaction studies, they
give quite different behaviors of the symmetry energy of nuclear matter at
supranuclear densities that lead to the \emph{soft} and \emph{stiff} scenarios
discussed recently in the literature. Different EOS's of the NS core and the
EOS of the NS crust given by the compressible liquid drop model have been used
as input of the Tolman-Oppenheimer-Volkov equations to study how the nuclear
symmetry energy affects the model prediction of different NS properties, like
the cooling process as well as the gravitational mass, radius, and moment of
inertia.
|
[{'version': 'v1', 'created': 'Thu, 26 May 2011 07:54:32 GMT'}]
|
2011-08-02
|
[array(['Loan', 'Doan Thi', ''], dtype=object)
array(['Tan', 'Ngo Hai', ''], dtype=object)
array(['Khoa', 'Dao T.', ''], dtype=object)
array(['Margueron', 'Jerome', ''], dtype=object)]
|
6,035 |
1301.0913
|
David Singh
|
Xin Chen, David Parker, Mao-Hua Du and David J. Singh
|
Potential thermoelectric performance of hole-doped Cu2O
| null |
New J. Phys. 15, 043029 (2013)
|
10.1088/1367-2630/15/4/043029
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
High thermoelectric performance in oxides requires stable conductive
materials that have suitable band structures. Here we show based on an analysis
of the thermopower and related properties using first-principles calculations
and Boltzmann transport theory that hole doped Cu2O may be such a material. We
find that hole-doped Cu2O has a high thermopower of above 200 microV/K even
with doping levels as high as 5.5x10 20 cm-3 at 500 K, mainly attributed to the
heavy valence bands of Cu2O. This is reminiscent of the cobaltate family of
high performance oxide thermoelectrics and implies that hole-doped Cu2O could
be an excellent thermoelectric material if suitably doped.
|
[{'version': 'v1', 'created': 'Sat, 5 Jan 2013 16:02:49 GMT'}]
|
2013-04-22
|
[array(['Chen', 'Xin', ''], dtype=object)
array(['Parker', 'David', ''], dtype=object)
array(['Du', 'Mao-Hua', ''], dtype=object)
array(['Singh', 'David J.', ''], dtype=object)]
|
6,036 |
hep-th/9912264
|
Dmitri Sorokin
|
Igor Bandos, Jerzy Lukierski and Dmitri Sorokin
|
The OSp(1|4) Superparticle and Exotic BPS States
|
Sprocl.sty, 10 pages. Talk given by D.S. at the XIV-th Max Born
Symposium, Karpacz, Poland, September 21--25, 1999
| null |
10.1142/9789812793263_0010
|
DFPD 99/TH/54
|
hep-th
| null |
We discuss the dynamics of a superparticle in a superspace whose isometry is
generated by the superalgebra OSp(1|4) or its central-charge contraction. Extra
coordinates of the superspace associated with tensorial central charges are
shown to describe spin degrees of freedom of the superparticle, so quantum
states form an infinite tower of (half)-integer helicities. A peculiar feature
of the model is that it admits BPS states which preserve 3/4 of target-space
supersymmetries.
|
[{'version': 'v1', 'created': 'Tue, 28 Dec 1999 14:38:06 GMT'}]
|
2016-11-23
|
[array(['Bandos', 'Igor', ''], dtype=object)
array(['Lukierski', 'Jerzy', ''], dtype=object)
array(['Sorokin', 'Dmitri', ''], dtype=object)]
|
6,037 |
1408.3594
|
Joel Franklin
|
Joel Franklin
|
Self-Consistent, Self-Coupled Scalar Gravity
|
A review and discussion of scalar, self-sourced gravity (originally
developed in [1], [2], [3], [8]), to appear in The American Journal of
Physics. v2
| null |
10.1119/1.4898585
| null |
gr-qc physics.class-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A scalar theory of gravity extending Newtonian gravity to include field
energy as its source is developed. The physical implications of the theory are
probed through its spherically symmetric (source) solutions. The aim is to
demonstrate rational physical model building, together with physical and
experimental checks of correctness. The theory discussed here was originally
considered by Einstein prior to his introduction of general relativity.
|
[{'version': 'v1', 'created': 'Fri, 15 Aug 2014 17:46:36 GMT'}
{'version': 'v2', 'created': 'Mon, 18 Aug 2014 22:12:45 GMT'}]
|
2015-06-22
|
[array(['Franklin', 'Joel', ''], dtype=object)]
|
6,038 |
2205.07466
|
Haozhe Liu
|
Haozhe Liu, Haoqin Ji, Yuexiang Li, Nanjun He, Haoqian Wu, Feng Liu,
Linlin Shen, Yefeng Zheng
|
Robust Representation via Dynamic Feature Aggregation
| null | null | null | null |
cs.CV cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Deep convolutional neural network (CNN) based models are vulnerable to the
adversarial attacks. One of the possible reasons is that the embedding space of
CNN based model is sparse, resulting in a large space for the generation of
adversarial samples. In this study, we propose a method, denoted as Dynamic
Feature Aggregation, to compress the embedding space with a novel
regularization. Particularly, the convex combination between two samples are
regarded as the pivot for aggregation. In the embedding space, the selected
samples are guided to be similar to the representation of the pivot. On the
other side, to mitigate the trivial solution of such regularization, the last
fully-connected layer of the model is replaced by an orthogonal classifier, in
which the embedding codes for different classes are processed orthogonally and
separately. With the regularization and orthogonal classifier, a more compact
embedding space can be obtained, which accordingly improves the model
robustness against adversarial attacks. An averaging accuracy of 56.91% is
achieved by our method on CIFAR-10 against various attack methods, which
significantly surpasses a solid baseline (Mixup) by a margin of 37.31%. More
surprisingly, empirical results show that, the proposed method can also achieve
the state-of-the-art performance for out-of-distribution (OOD) detection, due
to the learned compact feature space. An F1 score of 0.937 is achieved by the
proposed method, when adopting CIFAR-10 as in-distribution (ID) dataset and
LSUN as OOD dataset. Code is available at
https://github.com/HaozheLiu-ST/DynamicFeatureAggregation.
|
[{'version': 'v1', 'created': 'Mon, 16 May 2022 06:22:15 GMT'}]
|
2022-05-17
|
[array(['Liu', 'Haozhe', ''], dtype=object)
array(['Ji', 'Haoqin', ''], dtype=object)
array(['Li', 'Yuexiang', ''], dtype=object)
array(['He', 'Nanjun', ''], dtype=object)
array(['Wu', 'Haoqian', ''], dtype=object)
array(['Liu', 'Feng', ''], dtype=object)
array(['Shen', 'Linlin', ''], dtype=object)
array(['Zheng', 'Yefeng', ''], dtype=object)]
|
6,039 |
1307.7149
|
Daniel Whiteson
|
Leonard Apanasevich, Suneet Upadhyay, Nikos Varelas, Daniel Whiteson,
Felix Yu
|
Sensitivity of potential future $pp$ colliders to quark compositeness
| null | null | null | null |
hep-ex hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A study is presented of the sensitivity of potential future $pp$ colliders to
quark compositeness. The analysis uses normalized dijet angular distributions
compared to expectations from leading-order contact interaction models.
|
[{'version': 'v1', 'created': 'Fri, 26 Jul 2013 20:02:54 GMT'}
{'version': 'v2', 'created': 'Tue, 30 Jul 2013 15:18:28 GMT'}]
|
2013-07-31
|
[array(['Apanasevich', 'Leonard', ''], dtype=object)
array(['Upadhyay', 'Suneet', ''], dtype=object)
array(['Varelas', 'Nikos', ''], dtype=object)
array(['Whiteson', 'Daniel', ''], dtype=object)
array(['Yu', 'Felix', ''], dtype=object)]
|
6,040 |
1212.1483
|
Xingxing Xing
|
Alex Hayat, Xingxing Xing, Amir Feizpour, and Aephraim M. Steinberg
|
Multidimensional quantum information based on single-photon temporal
wavepackets
|
11 pages, 5 figures
|
Opt. Express, 20, 29174 (2012)
|
10.1364/OE.20.029174
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a multidimensional quantum information encoding approach based on
temporal modulation of single photons, where the Hilbert space can be spanned
by an in-principle infinite set of orthonormal temporal profiles. We analyze
two specific realizations of such modulation schemes, and show that error rate
per symbol can be smaller than 1% for practical implementations. Temporal
modulation may enable multidimensional quantum communication over the existing
fiber optical infrastructure, as well as provide an avenue for probing
high-dimensional entanglement approaching the continuous limit.
|
[{'version': 'v1', 'created': 'Thu, 6 Dec 2012 21:39:05 GMT'}
{'version': 'v2', 'created': 'Tue, 1 Jan 2013 23:58:43 GMT'}]
|
2013-01-03
|
[array(['Hayat', 'Alex', ''], dtype=object)
array(['Xing', 'Xingxing', ''], dtype=object)
array(['Feizpour', 'Amir', ''], dtype=object)
array(['Steinberg', 'Aephraim M.', ''], dtype=object)]
|
6,041 |
1507.03694
|
Randall Headrick
|
Jeffrey G. Ulbrandt, Meliha G. Rainville, Christa Hoskin, Suresh
Narayanan, Alec R. Sandy, Hua Zhou, Karl F. Ludwig Jr. and Randall L.
Headrick
|
Using coherent X-rays to directly measure the propagation velocity of
defects during thin film deposition
|
Revised version. 5 figures, 27 pages
| null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The properties of artificially grown thin films are often strongly affected
by the dynamic relationship between surface growth processes and subsurface
structure. Coherent mixing of X-ray signals promises to provide an approach to
better understand such processes. Here, we demonstrate the continuously
variable mixing of surface and bulk scattering signals during real-time studies
of sputter deposition of a-Si and a-WiS2 films by controlling the X-ray
penetration and escape depths in coherent grazing incidence small angle X-ray
scattering (Co-GISAXS). Under conditions where the X-ray signal comes from both
the growth surface and the thin film bulk, oscillations in temporal
correlations arise from coherent interference between scattering from
stationary bulk features and from the advancing surface. We also observe
evidence that elongated bulk features propagate upward at the same velocity as
the surface. Additionally, a highly surface sensitive mode is demonstrated that
can access the surface dynamics independently of the subsurface structure.
|
[{'version': 'v1', 'created': 'Tue, 14 Jul 2015 01:47:31 GMT'}
{'version': 'v2', 'created': 'Wed, 30 Sep 2015 20:23:49 GMT'}]
|
2015-10-02
|
[array(['Ulbrandt', 'Jeffrey G.', ''], dtype=object)
array(['Rainville', 'Meliha G.', ''], dtype=object)
array(['Hoskin', 'Christa', ''], dtype=object)
array(['Narayanan', 'Suresh', ''], dtype=object)
array(['Sandy', 'Alec R.', ''], dtype=object)
array(['Zhou', 'Hua', ''], dtype=object)
array(['Ludwig', 'Karl F.', 'Jr.'], dtype=object)
array(['Headrick', 'Randall L.', ''], dtype=object)]
|
6,042 |
2007.08606
|
T. Damour
|
Vasilisa Nikiforova and Thibault Damour
|
Black holes in torsion bigravity
|
19 pages, 3 figures
|
Phys. Rev. D 102, 084027 (2020)
|
10.1103/PhysRevD.102.084027
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study spherically symmetric black hole solutions in a four-parameter
Einstein-Cartan-type class of theories, called "torsion bigravity". These
theories offer a geometric framework (with a metric and an independent
torsionfull connection) for a modification of Einstein's theory that has the
same spectrum as bimetric gravity models. In addition to an Einsteinlike
massless spin-2 excitation, there is a massive spin-2 one (of range
$\kappa^{-1}$) coming from the torsion sector, rather than from a second
metric. We prove the existence of three broad classes of spherically-symmetric
black hole solutions in torsion bigravity. First, the Schwarzschild solution
defines an asymptotically-flat torsionless black hole for all values of the
parameters. [And we prove that one cannot deform a Schwarzschild solution, at
the linearized level, by adding an infinitesimal torsion hair.] Second, when
considering finite values of the range, we find that there exist
non-asymptotically-flat torsion-hairy black holes in a large domain of
parameter space. Third, we find that, in the limit of infinite range, there
exists a two-parameter family of asymptotically flat torsion-hairy black holes.
The latter black hole solutions give an interesting example of non-Einsteinian
(but still purely geometric) black hole structures which might be
astrophysically relevant when considering a range of cosmological size.
|
[{'version': 'v1', 'created': 'Thu, 16 Jul 2020 20:06:04 GMT'}]
|
2020-10-21
|
[array(['Nikiforova', 'Vasilisa', ''], dtype=object)
array(['Damour', 'Thibault', ''], dtype=object)]
|
6,043 |
1610.06105
|
Sei Howe
|
Sei Howe and Panos Parpas
|
Error Bounds for Control Constrained Singularly Perturbed
Linear-Quadratic Optimal Control Problems
|
32 pages, 7 figures
| null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a methodology for bounding the error term of an asymptotic
solution to a singularly perturbed optimal control (SPOC) problem whose exact
solution is known to be computationally intractable. In previous works, reduced
or computationally tractable problems that are no longer dependent on the
singular perturbation parameter $\epsilon$, where $\epsilon$ represents a
small, non-negative number, have provided asymptotic error bounds of the form
$O(\epsilon)$. Specifically, the optimal solution $\bar{V}$ of the reduced
problem has been shown to be asymptotically equivalent in $\epsilon$ to the
optimal solution $V(\epsilon)$ of the singularly perturbed problem in the sense
that $|V(\epsilon)-\bar{V}| =O(\epsilon)$ as $\epsilon \rightarrow 0$. In this
paper, we improve on this result by incorporating a duality theory into the
SPOC problem and derive an upper bound $\chi_u(\epsilon)$ and lower bound
$\chi_l(\epsilon)$ of $V(\epsilon)$ that hold for arbitrary $\epsilon$ and,
furthermore, satisfy the inequality $|\chi_u(\epsilon)-\chi_l(\epsilon)| \leq C
\epsilon$ for small $\epsilon$, with the constant $C$ determined. We carry out
numerical experiments to illustrate the computational savings obtained for the
upper and lower bound. In particular, we generate a set of 50 random SPOC
problems of a specific form and show that for $\epsilon$ smaller than
$10^{-2}$, it becomes faster, on average, to solve for the bounds rather than
the SPOC problem and for $\epsilon=10^{-5}$, the computational time for the
upper and lower bounds is approximately 20 times faster, on average, than that
of the SPOC problem.
|
[{'version': 'v1', 'created': 'Wed, 19 Oct 2016 17:02:17 GMT'}]
|
2016-10-20
|
[array(['Howe', 'Sei', ''], dtype=object)
array(['Parpas', 'Panos', ''], dtype=object)]
|
6,044 |
2303.17716
|
Vinod Raman
|
Vinod Raman, Unique Subedi, Ambuj Tewari
|
A Characterization of Online Multiclass Learnability
|
8 pages
| null | null | null |
cs.LG stat.ML
|
http://creativecommons.org/licenses/by/4.0/
|
We consider the problem of online multiclass learning when the number of
labels is unbounded. We show that the Multiclass Littlestone dimension, first
introduced in \cite{DanielyERMprinciple}, continues to characterize online
learnability in this setting. Our result complements the recent work by
\cite{Brukhimetal2022} who give a characterization of batch multiclass
learnability when the label space is unbounded.
|
[{'version': 'v1', 'created': 'Thu, 30 Mar 2023 21:35:48 GMT'}]
|
2023-04-03
|
[array(['Raman', 'Vinod', ''], dtype=object)
array(['Subedi', 'Unique', ''], dtype=object)
array(['Tewari', 'Ambuj', ''], dtype=object)]
|
6,045 |
1802.07011
|
Vladimir Bozhilov
|
Vladimir Bozhilov, Evgeni Ovcharov, Milen Minev, Yordan Darakchiev,
Angel Dimitrov, Stefan Georgiev, Manol Gerushin, Borislav Spassov, Kalina
Stoimenova
|
Photopolarimetrical Study of Blazar-type AGN OJ287 in 2012-2015 with the
2m RCC Telescope at NAO Rozhen
|
11 pages, 2 figures, Accepted for publishing in Annual of Sofia
University - Faculty of Physics, v. 111, 2018
| null | null | null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the results of a photopolarimetric study of the blazar OJ287 in
the period November 2012-January 2015. Observations were conducted using the
Focal Reductor FoReRo-2 of the 2-meter RCC telescope of the National
Astronomical Observatory (NAO) Rozhen. The observed change of the position
angle (P.A.) corresponds to mean rotation of the plane of polarization of 6.23
deg/day, in good agreement with previous measurements. An indication of a
correlation between the change of brightness in R-band and the change in the
degree of polarization is also observed.
|
[{'version': 'v1', 'created': 'Tue, 20 Feb 2018 08:45:48 GMT'}]
|
2018-02-21
|
[array(['Bozhilov', 'Vladimir', ''], dtype=object)
array(['Ovcharov', 'Evgeni', ''], dtype=object)
array(['Minev', 'Milen', ''], dtype=object)
array(['Darakchiev', 'Yordan', ''], dtype=object)
array(['Dimitrov', 'Angel', ''], dtype=object)
array(['Georgiev', 'Stefan', ''], dtype=object)
array(['Gerushin', 'Manol', ''], dtype=object)
array(['Spassov', 'Borislav', ''], dtype=object)
array(['Stoimenova', 'Kalina', ''], dtype=object)]
|
6,046 |
hep-ph/0509351
|
Eef van Beveren
|
Eef van Beveren, Joao E.G.N. Costa, Frieder Kleefeld, George Rupp
|
From the Kappa via the Ds0*(2317) to the chi_c0: connecting light and
heavy scalar mesons
|
11 pages, 3 figures, additional figures at
"http://cft.fis.uc.pt/eef/animations/start.html"
|
Phys.Rev.D74:037501,2006
|
10.1103/PhysRevD.74.037501
| null |
hep-ph
| null |
Pole trajectories connecting light and heavy scalar mesons, both broad
resonances and quasi-bound states, are computed employing a simple
coupled-channel model. Instead of varying the coupling constant as in previous
work, quark and meson masses are continuously changed, so as to have one scalar
meson evolve smoothly into another with different flavor(s). In particular, it
is shown, among several other cases, how the still controversial K0*(800) turns
into the established chi_c0, via the disputed D_s(2317). Moreover, a
chi'_c0(3946) is predicted, which may correspond to the recently observed
Y(3943) resonance. These results lend further support to our unified dynamical
picture of all scalar mesons, as unitarized q-qbar states with important
two-meson components.
|
[{'version': 'v1', 'created': 'Thu, 29 Sep 2005 16:04:58 GMT'}]
|
2008-11-26
|
[array(['van Beveren', 'Eef', ''], dtype=object)
array(['Costa', 'Joao E. G. N.', ''], dtype=object)
array(['Kleefeld', 'Frieder', ''], dtype=object)
array(['Rupp', 'George', ''], dtype=object)]
|
6,047 |
2208.04585
|
Linbo Liang
|
Linbo Liang, Guoxing Xia, Alexander Pukhov, John Patrick Farmer
|
Acceleration of an electron bunch with a non-Gaussian transverse profile
in a quasilinear plasma wakefield
| null | null | null | null |
physics.acc-ph
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Beam-driven plasma wakefield accelerators typically use the external
injection scheme to ensure controllable beam quality at injection. However, the
externally injected witness bunch may exhibit a non-Gaussian transverse density
distribution. Using particle-in-cell simulations, we show that the common beam
quality factors, such as the normalized RMS emittance and beam radius, do not
strongly depend on the initial transverse shapes of the witness beam.
Nonetheless, a beam with a highly-peaked transverse spatial profile can achieve
a higher fraction of the total beam charge in the core. The same effect can be
seen when the witness beam's transverse momentum profile has a peaked
non-Gaussian distribution. In addition, we find that an initially
non-axisymmetric beam becomes symmetric due to the interaction with the plasma
wakefield, and so it does not cause a detrimental effect for the beam
acceleration.
|
[{'version': 'v1', 'created': 'Tue, 9 Aug 2022 07:58:40 GMT'}]
|
2022-08-10
|
[array(['Liang', 'Linbo', ''], dtype=object)
array(['Xia', 'Guoxing', ''], dtype=object)
array(['Pukhov', 'Alexander', ''], dtype=object)
array(['Farmer', 'John Patrick', ''], dtype=object)]
|
6,048 |
1807.10927
|
Renata Jora
|
Amir H. Fariborz and Renata Jora
|
Generalized linear sigma model with two glueballs
|
24 pages, version accepted for publication in Phys. Rev. D
|
Phys. Rev. D 98, 094032 (2018)
|
10.1103/PhysRevD.98.094032
| null |
hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a generalized linear sigma model that includes both scalar and
pseudoscalar glueballs in addition to a quark-antiquark as well as a four-quark
chiral nonet. Utilizing the axial and trace anomalies of QCD (at the effective
mesonic level), we aim to develope the most general structure of the Lagrangian
which can be used to study the interaction of quarkonia with glueballs. We then
study the effect of scalar glueball on the vacuum of the model by considering a
decoupling limit in which the glueball fields are decoupled from quarkonia.
This determines the properties of the pure scalar glueball and builds a
practical foundation for determining the model parameters when the interactions
are turned on.
|
[{'version': 'v1', 'created': 'Sat, 28 Jul 2018 11:42:21 GMT'}
{'version': 'v2', 'created': 'Thu, 25 Oct 2018 13:02:41 GMT'}
{'version': 'v3', 'created': 'Thu, 25 Oct 2018 03:16:45 GMT'}]
|
2018-12-05
|
[array(['Fariborz', 'Amir H.', ''], dtype=object)
array(['Jora', 'Renata', ''], dtype=object)]
|
6,049 |
1612.03009
|
Irene Amado
|
Irene Amado, Bo Sundborg, Larus Thorlacius and Nico Wintergerst
|
Probing emergent geometry through phase transitions in free vector and
matrix models
|
24 pages, 1 table, 3 figures
| null |
10.1007/JHEP02(2017)005
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Boundary correlation functions provide insight into the emergence of an
effective geometry in higher spin gravity duals of O(N) or U(N) symmetric field
theories. On a compact manifold, the singlet constraint leads to nontrivial
dynamics at finite temperature and large N phase transitions even at vanishing
't Hooft coupling. At low temperature, the leading behavior of boundary
two-point functions is consistent with propagation through a bulk thermal anti
de Sitter space. Above the phase transition, the two-point function shows
significant departure from thermal AdS space and the emergence of localized
black hole like objects in the bulk. In adjoint models, these objects appear at
length scales of order of the AdS radius, consistent with a Hawking-Page
transition, but in vector models they are parametrically larger than the AdS
scale. In low dimensions, we find another crossover at large distances beyond
which the correlation function again takes a thermal AdS form, albeit with a
temperature dependent normalization factor.
|
[{'version': 'v1', 'created': 'Fri, 9 Dec 2016 13:21:22 GMT'}]
|
2017-03-08
|
[array(['Amado', 'Irene', ''], dtype=object)
array(['Sundborg', 'Bo', ''], dtype=object)
array(['Thorlacius', 'Larus', ''], dtype=object)
array(['Wintergerst', 'Nico', ''], dtype=object)]
|
6,050 |
1007.4673
|
Gautam Narayan
|
G. Narayan and G.B. Scharmer
|
Small-scale convection signatures associated with strong plage solar
magnetic field
|
Accepted for publication in Astronomy and Astrophysics
| null |
10.1051/0004-6361/201014956
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we study and quantify properties of strong-field small-scale
convection and compare observed properties with those predicted by numerical
simulations. We analyze spectropolarimetric 630.25 nm data from a unipolar
ephemeral region near sun center. We use line-of-sight velocities and magnetic
field measurements obtained with Milne-Eddington inversion techniques along
with measured continuum intensities and Stokes V amplitude asymmetry at a
spatial resolution of 0.15 arcseconds to establish statistical relations
between the measured quantities. We also study these properties for different
types of distinct magnetic features, such as micropores, bright points,
ribbons, flowers and strings. We present the first direct observations of a
small-scale granular magneto-convection pattern within extended regions of
strong (more than 600 G average) magnetic field. Along the boundaries of the
flux concentrations we see mostly downflows and asymmetric Stokes V profiles,
consistent with synthetic line profiles calculated from MHD simulations. We
note the frequent occurrence of bright downflows along these boundaries. In the
interior of the flux concentrations, we observe an up/down flow pattern that we
identify as small-scale magnetoconvection, appearing similar to that of
field-free granulation but with scales 4 times smaller. Measured RMS velocities
are 70% of those of nearby field-free granulation, even though the average
radiative flux is not reduced. The interiors of these flux concentrations are
dominated by upflows.
|
[{'version': 'v1', 'created': 'Tue, 27 Jul 2010 10:57:13 GMT'}]
|
2015-05-19
|
[array(['Narayan', 'G.', ''], dtype=object)
array(['Scharmer', 'G. B.', ''], dtype=object)]
|
6,051 |
0906.5158
|
Gerd P\"uhlhofer
|
E. G. Berezhko (1), G. P\"uhlhofer (2), H. J. V\"olk (3) ((1) Yu.G.
Shafer Institute of Cosmophysical Research and Aeronomy, (2)
Landessternwarte, (3) Max Planck Institut f\"ur Kernphysik)
|
Theory of cosmic ray and gamma-ray production in the supernova remnant
RX J0852.0-4622
|
14 pages, 8 figures, accepted for publication in A&A
| null |
10.1051/0004-6361/200809473
| null |
astro-ph.HE astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Aims. The properties of the Galactic supernova remnant (SNR) RX J0852.0-4622
are theoretically analysed.
Methods. An explicitly time-dependent, nonlinear kinetic model of cosmic ray
(CR) acceleration in SNRs is used to describe the properties of SNR RX
J0852.0-4622, the accelerated CRs and the nonthermal emission. The source is
assumed to be at a distance of ~1 kpc in the wind bubble of a massive
progenitor star. An estimate of the thermal X-ray flux in such a configuration
is given.
Results. We find that the overall synchrotron spectrum of RX J0852.0-4622 as
well as the filamentary structures in hard X-rays lead to an amplified magnetic
field B > 100 muG in the SNR interior. This implies that the leptonic very high
energy (VHE) gamma-ray emission is suppressed, and that the VHE gamma-rays are
hadronically dominated. The energy spectrum of protons produced over the
life-time of the remnant until now may well reach ''knee'' energies. The
derived gamma-ray morphology is consistent with the H.E.S.S. measurements. The
amount of energy in energetic particles corresponds to about 35% of the
hydrodynamic explosion energy. A remaining uncertainty concerns the thermal
X-ray flux at 1 keV. A rough estimate, possibly not quite appropriate for the
assumed wind bubble configuration, results in it being larger than the
nonthermal flux at this energy.
Conclusions. It is concluded that this SNR expanding into the wind bubble of
a massive star in a dense gas environment can be a hadronic gamma-ray source
that is consistent with all existing multi-wavelength constraints, except
possibly the thermal X-ray emission.
|
[{'version': 'v1', 'created': 'Sun, 28 Jun 2009 19:51:45 GMT'}]
|
2015-05-13
|
[array(['Berezhko', 'E. G.', ''], dtype=object)
array(['Pühlhofer', 'G.', ''], dtype=object)
array(['Völk', 'H. J.', ''], dtype=object)]
|
6,052 |
1107.4258
|
Fran\c{c}ois M\'eriaux
|
Fran\c{c}ois M\'eriaux, Ma\"el Le Treust, Samson Lasaulce, Michel
Kieffer
|
A Stochastic Game Formulation of Energy-Efficient Power Control:
Equilibrium Utilities and Practical Strategies
|
DSP 2011: 17th International Conference on Digital Signal Processing,
July 2011, Corfu, Greece
| null | null | null |
cs.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Frequency non-selective time-selective multiple access channels in which
transmitters can freely choose their power control policy are considered. The
individual objective of the transmitters is to maximize their averaged
energy-efficiency. For this purpose, a transmitter has to choose a power
control policy that is, a sequence of power levels adapted to the channel
variations. This problem can be formulated as a stochastic game with
discounting for which there exists a theorem characterizing all the equilibrium
utilities (equilibrium utility region). As in its general formulation, this
theorem relies on global channel state information (CSI), it is shown that some
points of the utility region can be reached with individual CSI. Interestingly,
time-sharing based solutions, which are usually considered for centralized
policies, appear to be part of the equilibrium solutions. This analysis is
illustrated by numerical results providing further insights to the problem
under investigation.
|
[{'version': 'v1', 'created': 'Thu, 21 Jul 2011 12:49:18 GMT'}]
|
2011-07-22
|
[array(['Mériaux', 'François', ''], dtype=object)
array(['Treust', 'Maël Le', ''], dtype=object)
array(['Lasaulce', 'Samson', ''], dtype=object)
array(['Kieffer', 'Michel', ''], dtype=object)]
|
6,053 |
2204.07681
|
Eric Moseley
|
Eric R. Moseley, Romain Teyssier, and B. T. Draine
|
Dust dynamics in RAMSES -- I. Methods and turbulent acceleration
|
23 pages, 13 figures, Accepted for publication in MNRAS
| null |
10.1093/mnras/stac3231
| null |
astro-ph.GA
|
http://creativecommons.org/licenses/by/4.0/
|
Supernova ejecta and stellar winds are believed to produce interstellar dust
grains with relatively large sizes. Smaller grains can be produced via the
shattering of large grains that have been stochastically accelerated. To
understand this stochastic acceleration, we have implemented novel
magnetohydrodynamic(MHD)-particle-in-cell(PIC) methods into the astrophysical
fluid code RAMSES. We treat dust grains as a set of massive ``superparticles''
that experience aerodynamic drag and Lorentz force. We subject our code to a
range of numerical tests designed to validate our method in different physical
conditions, as well as to illustrate possible mechanisms by which grains can be
accelerated. As a final test as well as a foundation for future work, we
present the results of decaying dusty MHD turbulence simulations with grain
parameters chosen to resemble 1-2 $\mu$m grains in typical cold neutral medium
conditions. We find that in these conditions, these grains can be effectively
accelerated to well beyond their shattering velocities. This is true for both
electrically charged and neutral grains. While the peak of the gas-grain
relative drift velocity distribution is higher for neutral grains, the drift
velocity distribution of charged grains exhibits an extended exponential tail
out to much greater velocities. Even so, the shapes of the distributions are
such that the extra gas-grain coupling provided by the Lorentz force offers
grains relative protection from shattering. We also discuss the connection
between our simulations and the relatively pristine ~$\mu$m sized presolar
grains that do not appear to have undergone significant wear in their
lifetimes.
|
[{'version': 'v1', 'created': 'Fri, 15 Apr 2022 23:57:39 GMT'}
{'version': 'v2', 'created': 'Fri, 28 Oct 2022 16:01:40 GMT'}]
|
2022-12-07
|
[array(['Moseley', 'Eric R.', ''], dtype=object)
array(['Teyssier', 'Romain', ''], dtype=object)
array(['Draine', 'B. T.', ''], dtype=object)]
|
6,054 |
2306.15694
|
Tim Maurice Julitz
|
Tim Maurice Julitz, Nadine Schl\"uter, Manuel L\"ower
|
Scenario-based Failure Analysis of Product Systems and their Environment
| null | null | null | null |
cs.SE
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
During the usage phase, a technical product system is in permanent
interaction with its environment. This interaction can lead to failures that
significantly endanger the safety of the user and negatively affect the quality
and reliability of the product. Conventional methods of failure analysis focus
on the technical product system. The interaction of the product with its
environment in the usage phase is not sufficiently considered, resulting in
undetected potential failures of the product that lead to complaints. For this
purpose, a methodology for failure identification is developed, which is
continuously improved through product usage scenarios. The use cases are
modelled according to a systems engineering approach with four views. The
linking of the product system, physical effects, events and environmental
factors enable the analysis of fault chains. These four parameters are subject
to great complexity and must be systematically analysed using databases and
expert knowledge. The scenarios are continuously updated by field data and
complaints. The new approach can identify potential failures in a more
systematic and holistic way. Complaints provide direct input on the scenarios.
Unknown, previously unrecognized events can be systematically identified
through continuous improvement. The complexity of the relationship between the
product system and its environmental factors can thus be adequately taken into
account in product development.
Keywords: failure analysis, methodology, product development, systems
engineering, scenario analysis, scenario improvement, environmental factors,
product environment, continuous improvement.
|
[{'version': 'v1', 'created': 'Sun, 25 Jun 2023 12:40:41 GMT'}]
|
2023-06-29
|
[array(['Julitz', 'Tim Maurice', ''], dtype=object)
array(['Schlüter', 'Nadine', ''], dtype=object)
array(['Löwer', 'Manuel', ''], dtype=object)]
|
6,055 |
1906.07309
|
Emil Prodan Dr.
|
Emil Prodan
|
Computational Many-Body Physics via $\mathcal M_{2^q}$ Algebra
| null | null | null | null |
cond-mat.str-el math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The many-body Hamiltonians and other fermionic physical observables are
expressed in terms of fermionic creation and annihilation operators, which form
the algebra of canonical anti-commutation relations (CAR). In this work we use
a canonical isomorphism between CAR and $\mathcal M_{2^\infty}$ algebras to
derive analytic matrix representations of many-fermion operators. Code-lines
implementing these matrix representations are supplied and Hubbard-type
Hamiltonians are worked out explicitly.
|
[{'version': 'v1', 'created': 'Mon, 17 Jun 2019 23:53:08 GMT'}
{'version': 'v2', 'created': 'Thu, 28 May 2020 14:09:25 GMT'}]
|
2020-05-29
|
[array(['Prodan', 'Emil', ''], dtype=object)]
|
6,056 |
1501.03165
|
Sean A. Hartnoll
|
Sean A. Hartnoll and Andreas Karch
|
Scaling theory of the cuprate strange metals
|
1 + 15 pages + references. 1 figure. v2 improved discussion,
references added
|
Phys. Rev. B 91, 155126 (2015)
|
10.1103/PhysRevB.91.155126
| null |
cond-mat.str-el cond-mat.supr-con hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that the anomalous temperature scaling of five distinct transport
quantities in the strange metal regime of the cuprate superconductors can be
reproduced with only two nontrivial critical exponents. The quantities are: (i)
the electrical resistivity, (ii) the Hall angle, (iii) the Hall Lorenz ratio,
(iv) the magnetoresistance and (v) the thermopower. The exponents are the
dynamical critical exponent z = 4/3 and an anomalous scaling dimension Phi =
-2/3 for the charge density operator.
|
[{'version': 'v1', 'created': 'Tue, 13 Jan 2015 21:00:15 GMT'}
{'version': 'v2', 'created': 'Wed, 28 Jan 2015 02:02:49 GMT'}]
|
2015-04-22
|
[array(['Hartnoll', 'Sean A.', ''], dtype=object)
array(['Karch', 'Andreas', ''], dtype=object)]
|
6,057 |
1911.09249
|
Hasnine Haque
|
Hasnine Haque, Masahiro Hashimoto, Nozomu Uetake, Masahiro Jinzaki
|
Semantic Segmentation of Thigh Muscle using 2.5D Deep Learning Network
Trained with Limited Datasets
|
7 pages, 5 figures, This manuscript was a detailed version of our
accepted oral paper in RSNA 2018. Ref: Haque,H, Hashimoto,M, Uetake,N,
Jinzaki,M, End to End Solution for Complete Thigh Muscle Semantic
Segmentation from Musculoskeletal CT using Deep Learning.
http://archive.rsna.org/2018/18006583.html
| null | null | null |
eess.IV cs.CV cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Purpose: We propose a 2.5D deep learning neural network (DLNN) to
automatically classify thigh muscle into 11 classes and evaluate its
classification accuracy over 2D and 3D DLNN when trained with limited datasets.
Enables operator invariant quantitative assessment of the thigh muscle volume
change with respect to the disease progression. Materials and methods:
Retrospective datasets consist of 48 thigh volume (TV) cropped from CT DICOM
images. Cropped volumes were aligned with femur axis and resample in 2 mm
voxel-spacing. Proposed 2.5D DLNN consists of three 2D U-Net trained with
axial, coronal and sagittal muscle slices respectively. A voting algorithm was
used to combine the output of U-Nets to create final segmentation. 2.5D U-Net
was trained on PC with 38 TV and the remaining 10 TV were used to evaluate
segmentation accuracy of 10 classes within Thigh. The result segmentation of
both left and right thigh were de-cropped to original CT volume space. Finally,
segmentation accuracies were compared between proposed DLNN and 2D/3D U-Net.
Results: Average segmentation DSC score accuracy of all classes with 2.5D U-Net
as 91.18% and Average Surface distance (ASD) accuracy as 0.84 mm. We found,
mean DSC score for 2D U-Net was 3.3% lower than the that of 2.5D U-Net and mean
DSC score of 3D U-Net was 5.7% lower than that of 2.5D U-Net when trained with
same datasets. Conclusion: We achieved a faster computationally efficient and
automatic segmentation of thigh muscle into 11 classes with reasonable
accuracy. Enables quantitative evaluation of muscle atrophy with disease
progression.
|
[{'version': 'v1', 'created': 'Thu, 21 Nov 2019 02:30:31 GMT'}]
|
2019-11-22
|
[array(['Haque', 'Hasnine', ''], dtype=object)
array(['Hashimoto', 'Masahiro', ''], dtype=object)
array(['Uetake', 'Nozomu', ''], dtype=object)
array(['Jinzaki', 'Masahiro', ''], dtype=object)]
|
6,058 |
1903.00649
|
Marianna Mazzilli
|
Marianna Mazzilli (for the ALICE Collaboration)
|
Multiplicity dependence of heavy-flavour correlations with charged
particle and collective effects in p--Pb collisions at
$\sqrt{s_\mathrm{NN}}$= 5.02 TeV with ALICE at LHC
| null | null | null | null |
hep-ex nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Azimuthal correlation studies of heavy-flavour particles with charged
particles in p--Pb collisions can give an insight into the cold nuclear matter
effects \cite{Andronic:2015wma} on heavy-quark production and hadronization
into heavy-flavour jets. Multiplicity-dependent measurements of angular
correlations of heavy-flavour particles with charged hadrons allow us to
investigate the collective behavior of the system and the initial state effects
on heavy flavour hadron production. In addition, they can reveal possible
modifications of the heavy-quark fragmentation and hadronization at different
multiplicities. We present ALICE measurements of azimuthal correlations of
prompt D-mesons with charged hadrons as a function of the multiplicity in p--Pb
collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02TeV. Moreover, the elliptic flow
($v_2$) of heavy-flavour hadron decay electrons in high-multiplicity p--Pb
collisions at $\sqrt{s_\mathrm{NN}}$= 5.02 TeV, obtained using correlations
with charged particles, is reported.
|
[{'version': 'v1', 'created': 'Sat, 2 Mar 2019 08:09:30 GMT'}]
|
2019-03-06
|
[array(['Mazzilli', 'Marianna', '', 'for the ALICE Collaboration'],
dtype=object) ]
|
6,059 |
1011.2352
|
Alexander Silenko
|
Vladimir G. Baryshevsky and Alexander J. Silenko
|
Potential for measurement of the tensor electric and magnetic
polarizabilities of the deuteron in storage-ring experiments with polarized
beams
|
11 pages, the extended version of the paper prepared for the
Proceedings of 19th International Spin Physics Symposium (September 27 -
October 2, 2010, Julich, Germany)
|
J.Phys.Conf.Ser.295:012034,2011
|
10.1088/1742-6596/295/1/012034
| null |
nucl-ex nucl-th physics.atom-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Measurement of the tensor electric and magnetic polarizabilities of the
deuteron is of great interest, especially in connection with the possibilities
of COSY and GSI. These polarizabilities can be measured in storage rings by the
frozen spin method providing a disappearance of g-2 precession. This method
will be used in the planned deuteron electric-dipole-moment experiment in
storage rings. The tensor electric polarizability of the deuteron significantly
influences the buildup of the vertical polarization in the above experiment.
The spin interactions depending on the electric dipole moment, the tensor
electric polarizability, and main systematical errors caused by field
misalignments have very different symmetries. For the considered experimental
conditions, the sensitivity to the deuteron EDM of $1\times10^{-29} e\cdot$cm
corresponds to measuring the both of tensor polarizabilities with an accuracy
of $\delta\alpha_T\approx\delta\beta_T\approx5\times10^{-42}$ cm$^3$. This
conservative estimate can be improved by excluding the systematical error
caused by the field instability which is negligible for the measurement of the
tensor polarizabilities. To find the tensor magnetic polarizability, the
horizontal components of the polarization vector should be measured.
|
[{'version': 'v1', 'created': 'Wed, 10 Nov 2010 12:03:55 GMT'}]
|
2011-06-02
|
[array(['Baryshevsky', 'Vladimir G.', ''], dtype=object)
array(['Silenko', 'Alexander J.', ''], dtype=object)]
|
6,060 |
1302.0842
|
Seth Johnson
|
Seth P. Johnson, Grant W. Wilson, Danial Q. Wang, Christina C.
Williams, Kim S. Scott, Min S. Yun, Alexandra Pope, James Lowenthal, Itziar
Aretxaga, David Hughes, M.J. Kim, Sungeun. Kim, Yoichi Tamura, Kotaro Kohno,
Hajime Ezawa, Ryohei Kawabe, Tai Oshima
|
X-ray Detections of Sub-millimetre Galaxies: Active Galactic Nuclei
Versus Starburst Contribution
|
23 pages, 10 figures, 6 tables. Accepted for publication in MNRAS
| null |
10.1093/mnras/stt197
| null |
astro-ph.GA astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a large-scale study of the X-ray properties and near-IR-to-radio
SEDs of submillimetre galaxies (SMGs) detected at 1.1mm with the AzTEC
instrument across a ~1.2 square degree area of the sky. Combining deep 2-4 Ms
Chandra data with Spitzer IRAC/MIPS and VLA data within the GOODS-N/S and
COSMOS fields, we find evidence for AGN activity in ~14 percent of 271 AzTEC
SMGs, ~28 percent considering only the two GOODS fields. Through X-ray spectral
modeling and SED fitting using Monte Carlo Markov Chain techniques to
Siebenmorgen et al. (2004) (AGN) and Efstathiou et al. (2000) (starburst)
templates, we find that while star formation dominates the IR emission, with
SFRs ~100-1000 M_sun/yr, the X-ray emission for most sources is almost
exclusively from obscured AGNs, with column densities in excess of 10^23 cm^-2.
Only for ~6 percent of our sources do we find an X-ray-derived SFR consistent
with NIR-to-radio SED derived SFRs. Inclusion of the X-ray luminosities as a
prior to the NIR-to-radio SED effectively sets the AGN luminosity and SFR,
preventing significant contribution from the AGN template. Our SED modeling
further shows that the AGN and starburst templates typically lack the required
1.1 mm emission necessary to match observations, arguing for an extended, cool
dust component. The cross correlation function between the full samples of
X-ray sources and SMGs in these fields does not indicate a strong correlation
between the two populations at large scales, suggesting that SMGs and AGNs do
not necessarily trace the same underlying large scale structure. Combined with
the remaining X-ray-dim SMGs, this suggests that sub-mm bright sources may
evolve along multiple tracks, with X-ray-detected SMGs representing
transitionary objects between periods of high star formation and AGN activity
while X-ray-faint SMGs represent a brief starburst phase of more normal
galaxies.
|
[{'version': 'v1', 'created': 'Mon, 4 Feb 2013 21:00:01 GMT'}]
|
2013-02-06
|
[array(['Johnson', 'Seth P.', ''], dtype=object)
array(['Wilson', 'Grant W.', ''], dtype=object)
array(['Wang', 'Danial Q.', ''], dtype=object)
array(['Williams', 'Christina C.', ''], dtype=object)
array(['Scott', 'Kim S.', ''], dtype=object)
array(['Yun', 'Min S.', ''], dtype=object)
array(['Pope', 'Alexandra', ''], dtype=object)
array(['Lowenthal', 'James', ''], dtype=object)
array(['Aretxaga', 'Itziar', ''], dtype=object)
array(['Hughes', 'David', ''], dtype=object)
array(['Kim', 'M. J.', ''], dtype=object)
array(['Kim', 'Sungeun.', ''], dtype=object)
array(['Tamura', 'Yoichi', ''], dtype=object)
array(['Kohno', 'Kotaro', ''], dtype=object)
array(['Ezawa', 'Hajime', ''], dtype=object)
array(['Kawabe', 'Ryohei', ''], dtype=object)
array(['Oshima', 'Tai', ''], dtype=object)]
|
6,061 |
1004.1376
|
Xiang Tang
|
Xiang Tang, Hsian-Hua Tseng
|
Duality theorems for \'etale gerbes on orbifolds
|
59 pages
|
Advances in Mathematics 250 (2014), 496--569
| null | null |
math.AG math.DG math.KT math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $G$ be a finite group and $\Y$ a $G$-gerbe over an orbifold $\B$. A
disconnected orbifold $\hat{\Y}$ and a flat U(1)-gerbe $c$ on $\hat{\Y}$ is
canonically constructed from $\Y$. Motivated by a proposal in physics, we study
a mathematical duality between the geometry of the $G$-gerbe $\Y$ and the
geometry of $\hat{\Y}$ {\em twisted by} $c$. We prove several results verifying
this duality in the contexts of noncommutative geometry and symplectic
topology. In particular, we prove that the category of sheaves on $\Y$ is
equivalent to the category of $c$-twisted sheaves on $\hat{\Y}$. When $\Y$ is
symplectic, we show, by a combination of techniques from noncommutative
geometry and symplectic topology, that the Chen-Ruan orbifold cohomology of
$\Y$ is isomorphic to the $c$-twisted orbifold cohomology of $\hat{\Y}$ as
graded algebras.
|
[{'version': 'v1', 'created': 'Thu, 8 Apr 2010 17:21:03 GMT'}
{'version': 'v2', 'created': 'Thu, 20 May 2010 20:48:08 GMT'}
{'version': 'v3', 'created': 'Fri, 4 Oct 2013 06:00:29 GMT'}]
|
2014-03-18
|
[array(['Tang', 'Xiang', ''], dtype=object)
array(['Tseng', 'Hsian-Hua', ''], dtype=object)]
|
6,062 |
0910.1630
|
Vitaly Kresin
|
Ramiro Moro, Jonathon Heinrich, Vitaly V. Kresin
|
Electric dipole moments of nitric acid-water complexes measured by
cluster beam deflection
|
Proceedings of ISACC 2009, The Fourth International Symposium "Atomic
Cluster Collisions: structure and dynamics from the nuclear to the biological
scale" (AIP Conference Proceedings)
|
AIP Conference Proceedings, Volume 1197, ed. by A.V.Solov'yov and
E.Surdutovich (Melville, NY 2009)
|
10.1063/1.3275689
| null |
physics.atm-clus physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Water clusters embedding a nitric acid molecule HNO3(H2O)_{n=1-10} are
investigated via electrostatic deflection of a molecular beam. We observe large
paraelectric susceptibilities that greatly exceed the electronic
polarizability, revealing the contribution of permanent dipole moments. The
moments derived from the data are also significantly higher than those of pure
water clusters. An enhancement in the susceptibility for n=5,6 and a rise in
cluster abundances setting in at n=6 suggest that dissociation of the solvated
acid molecule into ions takes place in this size range.
|
[{'version': 'v1', 'created': 'Thu, 8 Oct 2009 23:30:01 GMT'}]
|
2015-05-14
|
[array(['Moro', 'Ramiro', ''], dtype=object)
array(['Heinrich', 'Jonathon', ''], dtype=object)
array(['Kresin', 'Vitaly V.', ''], dtype=object)]
|
6,063 |
1202.2272
|
Matthias Hoeft
|
M. Hoeft, S. E. Nuza, S. Gottloeber, R. J. van Weeren, H. J. A.
Roettgering, and M. Brueggen
|
Radio relics in cosmological simulations
|
10 pages, 4 figures, Invited talk at the conference "Diffuse
Relativistic Plasmas", Bangalore, 1-4 March 2011; in press in special issue
of Journal of Astrophysics and Astronomy
| null |
10.1007/s12036-011-9127-z
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Radio relics have been discovered in many galaxy clusters. They are believed
to trace shock fronts induced by cluster mergers. Cosmological simulations
allow us to study merger shocks in detail since the intra-cluster medium is
heated by shock dissipation. Using high resolution cosmological simulations,
identifying shock fronts and applying a parametric model for the radio emission
allows us to simulate the formation of radio relics. We analyze a simulated
shock front in detail. We find a rather broad Mach number distribution. The
Mach number affects strongly the number density of relativistic electrons in
the downstream area, hence, the radio luminosity varies significantly across
the shock surface. The abundance of radio relics can be modeled with the help
of the radio power probability distribution which aims at predicting radio
relic number counts. Since the actual electron acceleration efficiency is not
known, predictions for the number counts need to be normalized by the observed
number of radio relics. For the characteristics of upcoming low frequency
surveys we find that about thousand relics are awaiting discovery.
|
[{'version': 'v1', 'created': 'Fri, 10 Feb 2012 14:40:41 GMT'}]
|
2015-03-13
|
[array(['Hoeft', 'M.', ''], dtype=object)
array(['Nuza', 'S. E.', ''], dtype=object)
array(['Gottloeber', 'S.', ''], dtype=object)
array(['van Weeren', 'R. J.', ''], dtype=object)
array(['Roettgering', 'H. J. A.', ''], dtype=object)
array(['Brueggen', 'M.', ''], dtype=object)]
|
6,064 |
1909.08706
|
S\'ergio Bacelar
|
S\'ergio Bacelar and Luis Antunes
|
Generational political dynamics of retirement pensions systems: An agent
based model
| null | null | null | null |
econ.GN q-fin.EC
|
http://creativecommons.org/licenses/by/4.0/
|
The increasing difficulties in financing the welfare state and in particular
public retirement pensions have been one of the outcomes both of the decrease
of fertility and birth rates combined with the increase of life expectancy. The
dynamics of retirement pensions are usually studied in Economics using
overlapping generation models. These models are based on simplifying
assumptions like the use of a representative agent to ease the problem of
tractability. Alternatively, we propose to use agent-based modelling (ABM),
relaxing the need for those assumptions and enabling the use of interacting and
heterogeneous agents assigning special importance to the study of
inter-generational relations. We treat pension dynamics both in economics and
political perspectives. The model we build, following the ODD protocol, will
try to understand the dynamics of choice of public versus private retirement
pensions resulting from the conflicting preferences of different agents but
also from the cooperation between them. The aggregation of these individual
preferences is done by voting. We combine a microsimulation approach following
the evolution of synthetic populations along time, with the ABM approach
studying the interactions between the different agent types. Our objective is
to depict the conditions for the survival of the public pensions system
emerging from the relation between egoistic and altruistic individual and
collective behaviours.
|
[{'version': 'v1', 'created': 'Fri, 13 Sep 2019 11:58:36 GMT'}]
|
2019-09-20
|
[array(['Bacelar', 'Sérgio', ''], dtype=object)
array(['Antunes', 'Luis', ''], dtype=object)]
|
6,065 |
2102.01179
|
Pascual Jara
|
Josefa M. Garc\'ia and Pascual Jara and Luis M. Merino
|
Lattice decomposition of modules
|
18 pages
| null | null | null |
math.RA math.AC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The first aim of this work is to characterize when the lattice of all
submodules of a module is a direct product of two lattices. In particular,
which decompositions of a module $M$ produce these decompositions: the
\emph{lattice decompositions}. In a first \textit{\'etage} this can be done
using endomorphisms of $M$, which produce a decomposition of the ring
$\textrm{End}_R(M)$ as a product of rings, i.e., they are central idempotent
endomorphisms. But since not every central idempotent endomorphism produces a
lattice decomposition, the classical theory is not of application. In a second
step we characterize when a particular module $M$ has a lattice decomposition;
this can be done, in the commutative case in a simple way using the support,
$\textrm{Supp}(M)$, of $M$; but, in general, it is not so easy. Once we know
when a module decomposes, we look for characterizing its decompositions. We
show that a good framework for this study, and its generalizations, could be
provided by the category $\sigma[M]$, the smallest Grothendieck subcategory of
$\textbf{Mod}-{R}$ containing $M$.
|
[{'version': 'v1', 'created': 'Mon, 1 Feb 2021 21:28:41 GMT'}]
|
2021-02-03
|
[array(['García', 'Josefa M.', ''], dtype=object)
array(['Jara', 'Pascual', ''], dtype=object)
array(['Merino', 'Luis M.', ''], dtype=object)]
|
6,066 |
1606.07842
|
Andrew Malouf Mr
|
Andrew Malouf, Ori Henderson-Sapir, Martin Gorjan, David J. Ottaway
|
Numerical Modeling of 3.5 micron Dual-Wavelength Pumped Erbium Doped
Mid-Infrared Fiber Lasers
|
12 pages, 16 figures, 4 tables, 4 author photos, submitted to IEEE
JQE
| null |
10.1109/JQE.2016.2611440
| null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The performance of mid-infrared erbium doped fiber lasers has dramatically
improved in the last few years. In this paper we present a numerical model that
provides valuable insight into the dynamics of a dual-wavelength pumped fiber
laser that can operate on the 3.5 micron and 2.8 micron bands. This model is a
much needed tool for optimizing and understanding the performance of these
laser systems. Comparisons between simulation and experimental results for
three different systems are presented.
|
[{'version': 'v1', 'created': 'Fri, 24 Jun 2016 22:06:07 GMT'}]
|
2016-11-03
|
[array(['Malouf', 'Andrew', ''], dtype=object)
array(['Henderson-Sapir', 'Ori', ''], dtype=object)
array(['Gorjan', 'Martin', ''], dtype=object)
array(['Ottaway', 'David J.', ''], dtype=object)]
|
6,067 |
2109.03773
|
Serena Ng
|
Jushan Bai and Serena Ng
|
Approximate Factor Models with Weaker Loadings
| null | null | null | null |
econ.EM stat.ME
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Pervasive cross-section dependence is increasingly recognized as a
characteristic of economic data and the approximate factor model provides a
useful framework for analysis. Assuming a strong factor structure where
$\Lop\Lo/N^\alpha$ is positive definite in the limit when $\alpha=1$, early
work established convergence of the principal component estimates of the
factors and loadings up to a rotation matrix. This paper shows that the
estimates are still consistent and asymptotically normal when $\alpha\in(0,1]$
albeit at slower rates and under additional assumptions on the sample size. The
results hold whether $\alpha$ is constant or varies across factor loadings. The
framework developed for heterogeneous loadings and the simplified proofs that
can be also used in strong factor analysis are of independent interest.
|
[{'version': 'v1', 'created': 'Wed, 8 Sep 2021 16:52:37 GMT'}
{'version': 'v2', 'created': 'Sun, 4 Dec 2022 13:15:10 GMT'}
{'version': 'v3', 'created': 'Sun, 12 Feb 2023 22:09:27 GMT'}
{'version': 'v4', 'created': 'Sun, 5 Mar 2023 19:44:40 GMT'}]
|
2023-03-07
|
[array(['Bai', 'Jushan', ''], dtype=object)
array(['Ng', 'Serena', ''], dtype=object)]
|
6,068 |
1901.06961
|
Cole Walsh
|
Cole Walsh, Katherine N. Quinn, C. Wieman, N.G. Holmes
|
Quantifying critical thinking: Development and validation of the Physics
Lab Inventory of Critical thinking (PLIC)
|
16 pages, 4 figures
| null | null | null |
physics.ed-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Introductory physics lab instruction is undergoing a transformation, with
increasing emphasis on developing experimentation and critical thinking skills.
These changes present a need for standardized assessment instruments to
determine the degree to which students develop these skills through
instructional labs. In this article, we present the development and validation
of the Physics Lab Inventory of Critical thinking (PLIC). We define critical
thinking as the ability to use data and evidence to decide what to trust and
what to do. The PLIC is a 10-question, closed-response assessment that probes
student critical thinking skills in the context of physics experimentation.
Using interviews and data from 5584 students at 29 institutions, we
demonstrate, through qualitative and quantitative means, the validity and
reliability of the instrument at measuring student critical thinking skills.
This establishes a valuable new assessment instrument for instructional labs.
|
[{'version': 'v1', 'created': 'Mon, 21 Jan 2019 15:31:07 GMT'}]
|
2019-01-23
|
[array(['Walsh', 'Cole', ''], dtype=object)
array(['Quinn', 'Katherine N.', ''], dtype=object)
array(['Wieman', 'C.', ''], dtype=object)
array(['Holmes', 'N. G.', ''], dtype=object)]
|
6,069 |
hep-ph/9811500
|
Gautam Bhattacharyya
|
Subhendu Rakshit, Gautam Bhattacharyya and Amitava Raychaudhuri
|
R-parity-violating trilinear couplings and recent neutrino data
|
Latex, 8 pages, including 1 Fig; minor changes in the text, some
references added, to appear in Phys. Rev. D (Rapid Communication)
|
Phys. Rev. D 59, 091701 (1999)
|
10.1103/PhysRevD.59.091701
|
SINP/TNP/98-31, CUPP--98/2
|
hep-ph
| null |
The nontrivial structure of the neutrino mass matrix, suggested by the recent
Super-Kamiokande results and data from other neutrino experiments, can be
reproduced in R-parity-violating supersymmetric theories. This requires sets of
products of R-parity-violating trilinear couplings to take appropriately chosen
values. It is shown that the existing constraints on these couplings are
satisfied by these choices.
|
[{'version': 'v1', 'created': 'Sat, 28 Nov 1998 08:17:30 GMT'}
{'version': 'v2', 'created': 'Wed, 10 Feb 1999 10:18:42 GMT'}]
|
2016-08-25
|
[array(['Rakshit', 'Subhendu', ''], dtype=object)
array(['Bhattacharyya', 'Gautam', ''], dtype=object)
array(['Raychaudhuri', 'Amitava', ''], dtype=object)]
|
6,070 |
2012.15665
|
Marco Gallo
|
Silvia Cingolani, Marco Gallo
|
On the fractional NLS equation and the effects of the potential well's
topology
| null | null |
10.1515/ans-2020-2114
| null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we consider the fractional nonlinear Schr\"odinger equation
$$\varepsilon^{2s}(-\Delta)^s v+ V(x) v= f(v), \quad x \in \mathbb{R}^N$$ where
$s \in (0,1)$, $N \geq 2$, $V \in C(\mathbb{R}^N,\mathbb{R})$ is a positive
potential and $f$ is a nonlinearity satisfying Berestycki-Lions type
conditions. For $\varepsilon>0$ small, we prove the existence of at least
$\rm{cupl}(K)+1$ positive solutions, where $K$ is a set of local minima in a
bounded potential well and $\rm{cupl}(K)$ denotes the cup-length of $K$. By
means of a variational approach, we analyze the topological difference between
two levels of an indefinite functional in a neighborhood of expected solutions.
Since the nonlocality comes in the decomposition of the space directly, we
introduce a new fractional center of mass, via a suitable seminorm. Some other
delicate aspects arise strictly related to the presence of the nonlocal
operator. By using regularity results based on fractional De Giorgi classes, we
show that the found solutions decay polynomially and concentrate around some
point of $K$ for $\varepsilon$ small.
|
[{'version': 'v1', 'created': 'Thu, 31 Dec 2020 15:44:52 GMT'}]
|
2021-01-01
|
[array(['Cingolani', 'Silvia', ''], dtype=object)
array(['Gallo', 'Marco', ''], dtype=object)]
|
6,071 |
math/0308246
|
Regis Pellissier
|
Regis Pellissier
|
Weak enriched categories - Categories enrichies faibles
|
Thesis, Universite de Nice - Sophia Antipolis (2002-06-27)
| null | null | null |
math.AT math.AG math.CT
| null |
This thesis is devoted to the proof of a theorem showing the existence of a
closed model category structure for weakly enriched categories. It requires
first of all the definitions of weakly enriched categories and equivalences of
weakly enriched categories such that these definitions recover some existing
notions of higher order weak categories, for example Segal categories,
Tamsamani n-categories and strict n-categories. In order to prove our theorem,
we elaborate a theory of plans for cell addition following the approach of the
small object argument a la Quillen. We conclude this work with the proof that
our theorem recovers the case of Segal categories. This last result requires a
fundamental groupoid-geometric realization adjunction between Segal groupoids
and topological spaces.
|
[{'version': 'v1', 'created': 'Tue, 26 Aug 2003 14:52:13 GMT'}]
|
2007-05-23
|
[array(['Pellissier', 'Regis', ''], dtype=object)]
|
6,072 |
math-ph/9910021
|
Roberto Scipioni
|
Roberto Scipioni
|
Non-Riemannian Gravitation amd its relation with Levi-Civita theories
|
123 pages, PhD thesis, Lancaster University, UK, (1999)
| null | null | null |
math-ph gr-qc math.DG math.MP
| null |
The mathematical relations between certain classical Non-Riemannian gravity
models and Einstein-Proca theories are discussed in details. We also show some
relations with theories with scalar fields.
|
[{'version': 'v1', 'created': 'Thu, 14 Oct 1999 22:19:01 GMT'}
{'version': 'v2', 'created': 'Fri, 15 Oct 1999 17:59:09 GMT'}]
|
2007-05-23
|
[array(['Scipioni', 'Roberto', ''], dtype=object)]
|
6,073 |
1807.01884
|
Bingwang Zhang
|
Qi Yuan and Bingwang Zhang and Haojie Li and Zhihui Wang and Zhongxuan
Luo
|
A Single Shot Text Detector with Scale-adaptive Anchors
|
8 pages, 6figures
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Currently, most top-performing text detection networks tend to employ
fixed-size anchor boxes to guide the search for text instances. They usually
rely on a large amount of anchors with different scales to discover texts in
scene images, thus leading to high computational cost. In this paper, we
propose an end-to-end box-based text detector with scale-adaptive anchors,
which can dynamically adjust the scales of anchors according to the sizes of
underlying texts by introducing an additional scale regression layer. The
proposed scale-adaptive anchors allow us to use a few number of anchors to
handle multi-scale texts and therefore significantly improve the computational
efficiency. Moreover, compared to discrete scales used in previous methods, the
learned continuous scales are more reliable, especially for small texts
detection. Additionally, we propose Anchor convolution to better exploit
necessary feature information by dynamically adjusting the sizes of receptive
fields according to the learned scales. Extensive experiments demonstrate that
the proposed detector is fast, taking only $0.28$ second per image, while
outperforming most state-of-the-art methods in accuracy.
|
[{'version': 'v1', 'created': 'Thu, 5 Jul 2018 07:48:18 GMT'}]
|
2018-07-06
|
[array(['Yuan', 'Qi', ''], dtype=object)
array(['Zhang', 'Bingwang', ''], dtype=object)
array(['Li', 'Haojie', ''], dtype=object)
array(['Wang', 'Zhihui', ''], dtype=object)
array(['Luo', 'Zhongxuan', ''], dtype=object)]
|
6,074 |
0704.1897
|
Sergei Zhukovsky
|
S. V. Zhukovsky, S. V. Gaponenko
|
Constraints on transmission, dispersion, and density of states in
dielectric multilayers and stepwise potential barriers with arbitrary layer
arrangement
|
10 pages, 5 figures, to be submitted to PRE
|
Phys. Rev. E 77, 046602 (2008)
|
10.1103/PhysRevE.77.046602
| null |
cond-mat.mes-hall physics.optics
| null |
Normal-incidence transmission and dispersion properties of optical
multilayers and one-dimensional stepwise potential barriers in the
non-tunneling regime are analytically investigated. The optical paths of every
constituent layer in a multilayer structure, as well as the parameters of every
step of the stepwise potential barrier, are constrained by a generalized
quarter-wave condition. No other restrictions on the structure geometry is
imposed, i.e., the layers are arranged arbitrarily. We show that the density of
states (DOS) spectra of the multilayer or barrier in question are subject to
integral conservation rules similar to the Barnett-Loudon sum rule but ocurring
within a finite frequency or energy interval. In the optical case, these
frequency intervals are regular. For the potential barriers, only non-periodic
energy intervals can be present in the spectrum of any given structure, and
only if the parameters of constituent potential steps are properly chosen.
Abstract The integral conservation relations derived analytically have also
been verified numerically. The relations can be used in dispersion-engineered
multilayer-based devices, e.g., ultrashort pulse compressors or ultracompact
optical delay lines, as well as to design multiple-quantum-well electronic
heterostructures with engineered DOS.
|
[{'version': 'v1', 'created': 'Mon, 16 Apr 2007 17:16:07 GMT'}
{'version': 'v2', 'created': 'Fri, 14 Mar 2008 15:10:07 GMT'}]
|
2008-04-13
|
[array(['Zhukovsky', 'S. V.', ''], dtype=object)
array(['Gaponenko', 'S. V.', ''], dtype=object)]
|
6,075 |
1210.2111
|
Mohan Sarovar
|
Mohan Sarovar, K. Birgitta Whaley
|
Design principles and fundamental trade-offs in biomimetic light
harvesting
|
35 pages, 8 figures. Published version
|
New J. Phys. 15, 013030 (2013)
|
10.1088/1367-2630/15/1/013030
| null |
physics.bio-ph physics.chem-ph quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recent developments in synthetic and supramolecular chemistry have created
opportunities to design organic systems with tailored nanoscale structure for
various technological applications. A key application area is the capture of
light energy and its conversion into electrochemical or chemical forms for
photovoltaic or sensing applications. In this work we consider cylindrical
assemblies of chromophores that model structures produced by several
supramolecular techniques. Our study is especially guided by the versatile
structures produced by virus-templated assembly. We use a multi-objective
optimization framework to determine design principles and limitations in light
harvesting performance for such assemblies, both in the presence and absence of
disorder. We identify a fundamental trade-off in cylindrical assemblies that is
encountered when attempting to maximize both efficiency of energy transfer and
absorption bandwidth. We also rationalize the optimal design strategies and
provide explanations for why various structures provide optimal performance.
Most importantly, we find that the optimal design strategies depend on the
amount of energetic and structural disorder in the system. The aim of these
studies is to develop a program of quantum-informed rational design for
construction of organic assemblies that have the same degree of tailored
nanoscale structure as biological photosynthetic light harvesting complexes,
and also have the potential to reproduce their remarkable light harvesting
performance.
|
[{'version': 'v1', 'created': 'Sun, 7 Oct 2012 22:07:35 GMT'}
{'version': 'v2', 'created': 'Mon, 25 Mar 2013 21:33:48 GMT'}]
|
2013-03-27
|
[array(['Sarovar', 'Mohan', ''], dtype=object)
array(['Whaley', 'K. Birgitta', ''], dtype=object)]
|
6,076 |
1404.5243
|
Dermot Green
|
D. G. Green, J. A. Ludlow, and G. F. Gribakin
|
Positron scattering and annihilation on noble gas atoms
|
24 pages, 17 figures
|
Phys. Rev. A 90, 032712 (2014)
|
10.1103/PhysRevA.90.032712
| null |
physics.atom-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Positron scattering and annihilation on noble gas atoms below the positronium
formation threshold is studied ab initio using many-body theory methods. The
many-body theory provides a near-complete understanding of the
positron-noble-gas-atom system at these energies and yields accurate numerical
results. It accounts for positron-atom and electron-positron correlations,
e.g., polarization of the atom by the incident positron and the
non-perturbative process of virtual positronium formation. These correlations
have a large effect on the scattering dynamics and result in a strong
enhancement of the annihilation rates compared to the independent-particle
mean-field description. Computed elastic scattering cross sections are found to
be in good agreement with recent experimental results and Kohn variational and
convergent close-coupling calculations. The calculated values of the
annihilation rate parameter $Z_{\rm eff}$ (effective number of electrons
participating in annihilation) rise steeply along the sequence of noble gas
atoms due to the increasing strength of the correlation effects, and agree well
with experimental data.
|
[{'version': 'v1', 'created': 'Mon, 21 Apr 2014 17:02:57 GMT'}
{'version': 'v2', 'created': 'Sun, 3 Aug 2014 20:10:06 GMT'}]
|
2014-09-12
|
[array(['Green', 'D. G.', ''], dtype=object)
array(['Ludlow', 'J. A.', ''], dtype=object)
array(['Gribakin', 'G. F.', ''], dtype=object)]
|
6,077 |
hep-th/0612179
|
Dirk Kreimer
|
Dirk Kreimer and Karen Yeats
|
Recursion and growth estimates in renormalizable quantum field theory
|
21 pages
|
Commun.Math.Phys.279:401-427,2008
|
10.1007/s00220-008-0431-7
|
BU=CMP/06-05
|
hep-th
| null |
In this paper we show that there is a Lipatov bound for the radius of
convergence for superficially divergent one-particle irreducible Green
functions in a renormalizable quantum field theory if there is such a bound for
the superficially convergent ones. The radius of convergence turns out to be
${\rm min}\{\rho,1/b_1\}$, where $\rho$ is the bound on the convergent ones,
the instanton radius, and $b_1$ the first coefficient of the $\beta$-function.
|
[{'version': 'v1', 'created': 'Mon, 18 Dec 2006 05:12:39 GMT'}]
|
2008-11-26
|
[array(['Kreimer', 'Dirk', ''], dtype=object)
array(['Yeats', 'Karen', ''], dtype=object)]
|
6,078 |
1811.05492
|
John A. Tomsick
|
John A. Tomsick (SSL/UCB), George B. Lansbury (Cambridge), Farid
Rahoui (Harvard), James Aird (Cambridge), David M. Alexander (Univ. of
Durham), Maica Clavel (Univ. Grenoble Alpes), AnaSofija Cuturilo (Seattle
Pacific Univ.), Francesca M. Fornasini (CfA), JaeSub Hong (CfA), Lizelke
Klindt (Univ. of Durham), Daniel Stern (JPL)
|
Chandra Observations of NuSTAR Serendipitous Sources near the Galactic
Plane
|
16 pages, accepted by ApJ
| null |
10.3847/1538-4357/aaf007
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The NuSTAR serendipitous survey has already uncovered a large number of
Active Galactic Nuclei (AGN), providing new information about the composition
of the Cosmic X-ray Background. For the AGN off the Galactic plane, it has been
possible to use the existing X-ray archival data to improve source
localizations, identify optical counterparts, and classify the AGN with optical
spectroscopy. However, near the Galactic Plane, better X-ray positions are
necessary to achieve optical or near-IR identifications due to the higher
levels of source crowding. Thus, we have used observations with the Chandra
X-ray Observatory to obtain the best possible X-ray positions. With eight
observations, we have obtained coverage for 19 NuSTAR serendips within 12 deg
of the plane. One or two Chandra sources are detected within the error circle
of 15 of the serendips, and we report on these sources and search for optical
counterparts. For one source (NuSTAR J202421+3350.9), we obtained a new optical
spectrum and detected the presence of hydrogen emission lines. The source is
Galactic, and we argue that it is likely a Cataclysmic Variable. For the other
sources, the Chandra positions will enable future classifications in order to
place limits on faint Galactic populations, including high-mass X-ray binaries
and magnetars.
|
[{'version': 'v1', 'created': 'Tue, 13 Nov 2018 19:00:24 GMT'}]
|
2019-01-09
|
[array(['Tomsick', 'John A.', '', 'SSL/UCB'], dtype=object)
array(['Lansbury', 'George B.', '', 'Cambridge'], dtype=object)
array(['Rahoui', 'Farid', '', 'Harvard'], dtype=object)
array(['Aird', 'James', '', 'Cambridge'], dtype=object)
array(['Alexander', 'David M.', '', 'Univ. of\n Durham'], dtype=object)
array(['Clavel', 'Maica', '', 'Univ. Grenoble Alpes'], dtype=object)
array(['Cuturilo', 'AnaSofija', '', 'Seattle\n Pacific Univ.'],
dtype=object)
array(['Fornasini', 'Francesca M.', '', 'CfA'], dtype=object)
array(['Hong', 'JaeSub', '', 'CfA'], dtype=object)
array(['Klindt', 'Lizelke', '', 'Univ. of Durham'], dtype=object)
array(['Stern', 'Daniel', '', 'JPL'], dtype=object)]
|
6,079 |
1406.0968
|
Christopher Kirk PhD
|
Christopher S Kirk
|
Integration of a Predictive, Continuous Time Neural Network into
Securities Market Trading Operations
|
11 pages
| null | null | null |
q-fin.CP cs.CE cs.NE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper describes recent development and test implementation of a
continuous time recurrent neural network that has been configured to predict
rates of change in securities. It presents outcomes in the context of popular
technical analysis indicators and highlights the potential impact of continuous
predictive capability on securities market trading operations.
|
[{'version': 'v1', 'created': 'Wed, 4 Jun 2014 08:25:56 GMT'}]
|
2014-06-05
|
[array(['Kirk', 'Christopher S', ''], dtype=object)]
|
6,080 |
1310.7388
|
Pasi Nurmi
|
P. Nurmi, P. Hein\"am\"aki, T. Sepp, E. Tago, E. Saar, M. Gramann, M.
Einasto, E. Tempel, J. Einasto
|
Groups in the Millennium Simulation and in SDSS DR7
|
17 pages, 8 figures
|
2013MNRAS.tmp.2296N
|
10.1093/mnras/stt1571
| null |
astro-ph.CO astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Millennium N-body simulation and the Sloan Digital Sky Survey seventh
data release (SDSS DR7) galaxy and galaxy group catalogues are compared to
study the properties of galaxy groups and the distribution of galaxies in
groups. We construct mock galaxy group catalogues for a Millennium
semi-analytical galaxy catalogue by using the same friends-of-friends method,
which was used by Tago et al to analyse the SDSS data. We analyse in detail the
group luminosities, group richnesses, virial radii, sizes of groups and their
rms velocities for four volume-limited samples from observations and
simulations. Our results show that the spatial densities of groups agree within
one order of magnitude in all samples with a rather good agreement between the
mock catalogues and observations. All group property distributions have similar
shapes and amplitudes for richer groups. For galaxy pairs and small groups, the
group properties for observations and simulations are clearly different. In
addition, the spatial distribution of galaxies in small groups is different: at
the outskirts of the groups the galaxy number distributions do not agree,
although the agreement is relatively good in the inner regions. Differences in
the distributions are mainly due to the observational limitations in the SDSS
sample and to the problems in the semi-analytical methods that produce too
compact and luminous groups.
|
[{'version': 'v1', 'created': 'Mon, 28 Oct 2013 11:48:29 GMT'}]
|
2013-10-29
|
[array(['Nurmi', 'P.', ''], dtype=object)
array(['Heinämäki', 'P.', ''], dtype=object)
array(['Sepp', 'T.', ''], dtype=object)
array(['Tago', 'E.', ''], dtype=object)
array(['Saar', 'E.', ''], dtype=object)
array(['Gramann', 'M.', ''], dtype=object)
array(['Einasto', 'M.', ''], dtype=object)
array(['Tempel', 'E.', ''], dtype=object)
array(['Einasto', 'J.', ''], dtype=object)]
|
6,081 |
1704.04978
|
Mehmet Onder
|
Zehra Ekinci, Mehmet \"Onder
|
A New Approach to Non-lightlike Curve Pairs
|
14 pages
| null | null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we introduce a new approach to non-lightlike curve pairs by
using integral curves in Minkowski 3-space. We consider direction curve and
donor curve to study non-lightlike curve couples such as involute-evolute
curves, Mannheim partner curves and Bertrand partner curves. We obtain new
methods to construct partner curves of a unit speed non-lightlike curve and
give some applications related to helices and slant helices.
|
[{'version': 'v1', 'created': 'Tue, 28 Mar 2017 13:19:18 GMT'}
{'version': 'v2', 'created': 'Mon, 6 Dec 2021 08:04:23 GMT'}]
|
2021-12-07
|
[array(['Ekinci', 'Zehra', ''], dtype=object)
array(['Önder', 'Mehmet', ''], dtype=object)]
|
6,082 |
2101.06817
|
Daniel C. Douglas
|
Daniel C. Douglas
|
Quantum traces for $\mathrm{SL}_n(\mathbb{C})$: the case $n=3$
|
39 pages, 40 figures + 2 appendices (including computer code); 87
pages in total. Version 3: Added details
| null | null | null |
math.GT math.QA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We generalize Bonahon-Wong's $\mathrm{SL}_2$-quantum trace map to the setting
of $\mathrm{SL}_3$. More precisely, given a non-zero complex parameter $q=e^{2
\pi i \hbar}$, we associate to each isotopy class of framed oriented links $K$
in a thickened punctured surface $\mathfrak{S} \times (0, 1)$ a Laurent
polynomial $\mathrm{Tr}_\lambda^q(K) = \mathrm{Tr}_\lambda^q(K)(X_i^q)$ in
$q$-deformations $X_i^q$ of the Fock-Goncharov $\mathcal{X}$-coordinates for
higher Teichm\"{u}ller space. This construction depends on a choice $\lambda$
of ideal triangulation of the surface $\mathfrak{S}$. Along the way, we propose
a definition for a $\mathrm{SL}_n$-version of this invariant.
|
[{'version': 'v1', 'created': 'Mon, 18 Jan 2021 00:34:35 GMT'}
{'version': 'v2', 'created': 'Fri, 24 Sep 2021 22:46:08 GMT'}
{'version': 'v3', 'created': 'Sat, 4 Jun 2022 23:15:13 GMT'}]
|
2022-06-07
|
[array(['Douglas', 'Daniel C.', ''], dtype=object)]
|
6,083 |
2210.12336
|
GuangChen Sun
|
GuangChen Sun, Yougang Wang, Chao Liu, Richard J. Long, Xuelei Chen,
Qi Gao
|
Classifying globular clusters and applying them to estimate the mass of
the Milky Way
|
32 pages, 11 figures, Accepted to RAA
| null |
10.1088/1674-4527/ac9e91
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We combine the kinematics of 159 globular clusters (GCs) provided by the Gaia
Early Data Release 3 (EDR3) with other observational data to classify the GCs,
and to estimate the mass of the Milky Way (MW). We use the age-metallicity
relation, integrals of motion, action space and the GC orbits to identify the
GCs as either formed in-situ (Bulge and Disk) or ex situ (via accretion). We
find that $45.3\%$ have formed in situ, $38.4\%$ may be related to known merger
events: Gaia-Sausage-Enceladus, the Sagittarius dwarf galaxy, the Helmi
streams, the Sequoia galaxy, and the Kraken galaxy. We also further identify
three new sub-structures associated with the Gaia-Sausage-Enceladus. The
remaining $16.3\%$ of GCs are unrelated to the known mergers and thought to be
from small accretion events. We select 46 GCs which have radii $8.0<r<37.3$ kpc
and obtain the anisotropy parameter $\beta=0.315_{-0.049}^{+0.055}$, which is
lower than the recent result using the sample of GCs in Gaia Data Release 2,
but still in agreement with it by considering the error bar. By using the same
sample, we obtain the MW mass inside the outermost GC as $M(<37.3
kpc)=0.423_{-0.02}^{+0.02}\times10^{12}M_{\odot}$, and the corresponding
$M_{200}=1.11_{-0.18}^{+0.25}\times10^{12}M_{\odot}$. The estimated mass is
consistent with the results in many recent studies. We also find that the
estimated $\beta$ and mass depend on the selected sample of GCs. However, it is
difficult to determine whether a GC fully traces the potential of the MW.
|
[{'version': 'v1', 'created': 'Sat, 22 Oct 2022 02:42:02 GMT'}
{'version': 'v2', 'created': 'Sun, 11 Dec 2022 07:18:17 GMT'}]
|
2023-01-18
|
[array(['Sun', 'GuangChen', ''], dtype=object)
array(['Wang', 'Yougang', ''], dtype=object)
array(['Liu', 'Chao', ''], dtype=object)
array(['Long', 'Richard J.', ''], dtype=object)
array(['Chen', 'Xuelei', ''], dtype=object)
array(['Gao', 'Qi', ''], dtype=object)]
|
6,084 |
1402.6306
|
Stefano Martiniani
|
Stefano Martiniani, Jacob D. Stevenson, David J. Wales and Daan
Frenkel
|
Superposition Enhanced Nested Sampling
| null |
Phys. Rev. X 4, 031034 (2014)
|
10.1103/PhysRevX.4.031034
| null |
cond-mat.stat-mech astro-ph.IM physics.data-an
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The theoretical analysis of many problems in physics, astronomy and applied
mathematics requires an efficient numerical exploration of multimodal parameter
spaces that exhibit broken ergodicity. Monte Carlo methods are widely used to
deal with these classes of problems, but such simulations suffer from a
ubiquitous sampling problem: the probability of sampling a particular state is
proportional to its entropic weight. Devising an algorithm capable of sampling
efficiently the full phase space is a long-standing problem. Here we report a
new hybrid method for the exploration of multimodal parameter spaces exhibiting
broken ergodicity. Superposition enhanced nested sampling (SENS) combines the
strengths of global optimization with the unbiased/athermal sampling of nested
sampling, greatly enhancing its efficiency with no additional parameters. We
report extensive tests of this new approach for atomic clusters that are known
to have energy landscapes for which conventional sampling schemes suffer from
broken ergodicity. We also introduce a novel parallelization algorithm for
nested sampling.
|
[{'version': 'v1', 'created': 'Tue, 25 Feb 2014 20:34:09 GMT'}
{'version': 'v2', 'created': 'Mon, 2 Jun 2014 16:48:48 GMT'}]
|
2014-09-02
|
[array(['Martiniani', 'Stefano', ''], dtype=object)
array(['Stevenson', 'Jacob D.', ''], dtype=object)
array(['Wales', 'David J.', ''], dtype=object)
array(['Frenkel', 'Daan', ''], dtype=object)]
|
6,085 |
1806.10294
|
Jian-Dong Zhang
|
Jian-Dong Zhang, Zi-Jing Zhang, Long-Zhu Cen, and Yuan Zhao
|
Angular displacement estimation of Heisenberg scaling: Tunable squeezed
Bell state via the enhancement of spin and orbital angular momenta
|
7 pages, 8 figures
|
J. Opt. 21, 035201 (2019)
|
10.1088/2040-8986/ab04b7
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We demonstrate an angular momentum-enhanced protocol that permits an angular
displacement estimation by using tunable squeezed Bell state and parity
detection. We consider the resolution and the sensitivity, super-resolution is
presented along with Heisenberg scaling sensitivity for arbitrary tunable
factor, the tunable factor which can optimize the sensitivity is also
discussed. Additionally, we analyze the advantages of using angular momentum
via considering and comparing simulation results. Under the situation of the
optimal tunable factor, the Heisenberg-limited sensitivity and
$2\left(\ell+1\right)$-fold super-resolution peak with quantum number $\ell$
are achieved.
|
[{'version': 'v1', 'created': 'Wed, 27 Jun 2018 04:35:01 GMT'}]
|
2019-02-25
|
[array(['Zhang', 'Jian-Dong', ''], dtype=object)
array(['Zhang', 'Zi-Jing', ''], dtype=object)
array(['Cen', 'Long-Zhu', ''], dtype=object)
array(['Zhao', 'Yuan', ''], dtype=object)]
|
6,086 |
cond-mat/0603856
|
Elisabeth Sch\"oll-Paschinger
|
Elisabeth Scholl-Paschinger and Christoph Dellago
|
A proof of Jarzynski's non-equilibrium work theorem for dynamical
systems that conserve the canonical distribution
|
12 pages
|
J. Chem. Phys. 125, 054105 (2006)
|
10.1063/1.2227025
| null |
cond-mat.stat-mech
| null |
We present a derivation of the Jarzynski identity and the Crooks fluctuation
theorem for systems governed by deterministic dynamics that conserves the
canonical distribution such as Hamiltonian dynamics, Nose-Hoover dynamics,
Nose-Hoover chains and Gaussian isokinetic dynamics. The proof is based on a
relation between the heat absorbed by the system during the non-equilibrium
process and the Jacobian of the phase flow generated by the dynamics.
|
[{'version': 'v1', 'created': 'Fri, 31 Mar 2006 12:46:43 GMT'}
{'version': 'v2', 'created': 'Wed, 10 May 2006 08:35:14 GMT'}]
|
2009-11-11
|
[array(['Scholl-Paschinger', 'Elisabeth', ''], dtype=object)
array(['Dellago', 'Christoph', ''], dtype=object)]
|
6,087 |
1701.02023
|
Vojt\v{e}ch Vl\v{c}ek
|
Vojt\v{e}ch Vl\v{c}ek, Roi Baer, Eran Rabani, Daniel Neuhauser
|
Simple eigenvalue-self-consistent $\bar{\Delta}GW_{0}$
|
7 pages, 3 figures, 2 tables
| null |
10.1063/1.5042785
| null |
physics.chem-ph cond-mat.mes-hall physics.atm-clus physics.comp-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We derive a general form of eigenvalue self-consistency for $GW_{0}$ in the
time domain and use it to obtain a simplified postprocessing eigenvalue
self-consistency, which we label $\bar{\Delta}GW_{0}$. The method costs the
same as a one-shot $G_{0}W_{0}$ when the latter gives the full frequency-domain
(or time-domain) matrix element of the self-energy. The accuracy of
$\bar{\Delta}GW_{0}$ increases with system size, as demonstrated here by
comparison to other $GW$ self-consistency results and to CCSD(T) predictions.
When combined with the large-scale stochastic $G_{0}W_{0}$ formulation
$\bar{\Delta}GW_{0}$ is applicable to very large systems, as exemplified by
periodic supercells of semiconductors and insulators with 2048 valence
electrons. For molecules the error of our eventual partially self-consistent
approach starts at about 0.2eV for small molecules and decreases to 0.05eV for
large ones, while for the periodic solids studied here the mean-absolute-error
is only 0.03eV.
|
[{'version': 'v1', 'created': 'Sun, 8 Jan 2017 22:11:36 GMT'}
{'version': 'v2', 'created': 'Wed, 11 Apr 2018 03:49:25 GMT'}]
|
2018-11-14
|
[array(['Vlček', 'Vojtěch', ''], dtype=object)
array(['Baer', 'Roi', ''], dtype=object)
array(['Rabani', 'Eran', ''], dtype=object)
array(['Neuhauser', 'Daniel', ''], dtype=object)]
|
6,088 |
1810.00855
|
Jackie Villadsen
|
Jackie Villadsen (1, 2) and Gregg Hallinan (2) ((1) National Radio
Astronomy Observatory (2) California Institute of Technology)
|
Ultra-Wideband Detection of 22 Coherent Radio Bursts on M Dwarfs
|
48 pages, 23 figures. Submitted to ApJ
| null |
10.3847/1538-4357/aaf88e
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Coherent radio bursts detected from M dwarfs have some analogy with solar
radio bursts, but reach orders of magnitude higher luminosities. These events
trace particle acceleration, powered by magnetic reconnection, shock fronts
(such as formed by coronal mass ejections, CMEs), and magnetospheric currents,
in some cases offering the only window into these processes in stellar
atmospheres. We conducted a 58-hour, ultra-wideband survey for coherent radio
bursts on 5 active M dwarfs. We used the Karl G. Jansky Very Large Array (VLA)
to observe simultaneously in three frequency bands covering a subset of 224-482
MHz and 1-6 GHz, achieving the widest fractional bandwidth to date for any
observations of stellar radio bursts. We detected 22 bursts across 13 epochs,
providing the first large sample of wideband dynamic spectra of stellar
coherent radio bursts. The observed bursts have diverse morphology, with
durations ranging from seconds to hours, but all share strong (40-100%)
circular polarization. No events resemble solar Type II bursts (often
associated with CMEs), but we cannot rule out the occurrence of radio-quiet
stellar CMEs. The hours-long bursts are all polarized in the sense of the
x-mode of the star's large-scale magnetic field, suggesting they are cyclotron
maser emission from electrons accelerated in the large-scale field, analogous
to auroral processes on ultracool dwarfs. The duty cycle of luminous coherent
bursts peaks at 25% at 1-1.4 GHz, declining at lower and higher frequencies,
indicating source regions in the low corona. At these frequencies, active M
dwarfs should be the most common galactic transient source.
|
[{'version': 'v1', 'created': 'Mon, 1 Oct 2018 17:51:46 GMT'}]
|
2019-02-13
|
[array(['Villadsen', 'Jackie', ''], dtype=object)
array(['Hallinan', 'Gregg', ''], dtype=object)]
|
6,089 |
2301.11660
|
Hyunsoo Cho
|
Hyunsoo Cho, Choonghyun Park, Junyeop Kim, Hyuhng Joon Kim, Kang Min
Yoo, and Sang-goo Lee
|
Probing Out-of-Distribution Robustness of Language Models with
Parameter-Efficient Transfer Learning
|
*SEM 2023
| null | null | null |
cs.CL
|
http://creativecommons.org/licenses/by/4.0/
|
As the size of the pre-trained language model (PLM) continues to increase,
numerous parameter-efficient transfer learning methods have been proposed
recently to compensate for the tremendous cost of fine-tuning. Despite the
impressive results achieved by large pre-trained language models (PLMs) and
various parameter-efficient transfer learning (PETL) methods on sundry
benchmarks, it remains unclear if they can handle inputs that have been
distributionally shifted effectively. In this study, we systematically explore
how the ability to detect out-of-distribution (OOD) changes as the size of the
PLM grows or the transfer methods are altered. Specifically, we evaluated
various PETL techniques, including fine-tuning, Adapter, LoRA, and
prefix-tuning, on three different intention classification tasks, each
utilizing various language models with different scales.
|
[{'version': 'v1', 'created': 'Fri, 27 Jan 2023 11:27:40 GMT'}
{'version': 'v2', 'created': 'Mon, 30 Jan 2023 07:17:09 GMT'}
{'version': 'v3', 'created': 'Fri, 9 Jun 2023 05:06:58 GMT'}
{'version': 'v4', 'created': 'Wed, 14 Jun 2023 03:12:50 GMT'}]
|
2023-06-16
|
[array(['Cho', 'Hyunsoo', ''], dtype=object)
array(['Park', 'Choonghyun', ''], dtype=object)
array(['Kim', 'Junyeop', ''], dtype=object)
array(['Kim', 'Hyuhng Joon', ''], dtype=object)
array(['Yoo', 'Kang Min', ''], dtype=object)
array(['Lee', 'Sang-goo', ''], dtype=object)]
|
6,090 |
1309.0474
|
Paulwin Graewe
|
Paulwin Graewe, Ulrich Horst, Eric S\'er\'e
|
Smooth solutions to portfolio liquidation problems under price-sensitive
market impact
| null | null |
10.1016/j.spa.2017.06.013
| null |
q-fin.PM math.OC q-fin.TR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the stochastic control problem of a financial trader that needs
to unwind a large asset portfolio within a short period of time. The trader can
simultaneously submit active orders to a primary market and passive orders to a
dark pool. Our framework is flexible enough to allow for price-dependent impact
functions describing the trading costs in the primary market and
price-dependent adverse selection costs associated with dark pool trading. We
prove that the value function can be characterized in terms of the unique
smooth solution to a PDE with singular terminal value, establish its explicit
asymptotic behavior at the terminal time, and give the optimal trading strategy
in feedback form.
|
[{'version': 'v1', 'created': 'Mon, 2 Sep 2013 17:43:52 GMT'}
{'version': 'v2', 'created': 'Mon, 9 Dec 2013 13:29:13 GMT'}
{'version': 'v3', 'created': 'Wed, 6 May 2015 16:13:35 GMT'}
{'version': 'v4', 'created': 'Wed, 13 Jul 2016 20:06:49 GMT'}
{'version': 'v5', 'created': 'Fri, 25 Nov 2016 12:16:48 GMT'}
{'version': 'v6', 'created': 'Thu, 26 Jan 2017 09:43:50 GMT'}
{'version': 'v7', 'created': 'Thu, 22 Jun 2017 07:54:01 GMT'}]
|
2017-07-07
|
[array(['Graewe', 'Paulwin', ''], dtype=object)
array(['Horst', 'Ulrich', ''], dtype=object)
array(['Séré', 'Eric', ''], dtype=object)]
|
6,091 |
2111.03923
|
Sheetal Rajpal
|
Sheetal Rajpal, Virendra Kumar, Manoj Agarwal, Naveen Kumar
|
Deep Learning Based Model for Breast Cancer Subtype Classification
|
Paper has been accepted for publication in ICACET 2021
| null | null | null |
cs.LG q-bio.QM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Breast cancer has long been a prominent cause of mortality among women.
Diagnosis, therapy, and prognosis are now possible, thanks to the availability
of RNA sequencing tools capable of recording gene expression data. Molecular
subtyping being closely related to devising clinical strategy and prognosis,
this paper focuses on the use of gene expression data for the classification of
breast cancer into four subtypes, namely, Basal, Her2, LumA, and LumB. In stage
1, we suggested a deep learning-based model that uses an autoencoder to reduce
dimensionality. The size of the feature set is reduced from 20,530 gene
expression values to 500 by using an autoencoder. This encoded representation
is passed to the deep neural network of the second stage for the classification
of patients into four molecular subtypes of breast cancer. By deploying the
combined network of stages 1 and 2, we have been able to attain a mean 10-fold
test accuracy of 0.907 on the TCGA breast cancer dataset. The proposed
framework is fairly robust throughout 10 different runs, as shown by the
boxplot for classification accuracy. Compared to related work reported in the
literature, we have achieved a competitive outcome. In conclusion, the proposed
two-stage deep learning-based model is able to accurately classify four breast
cancer subtypes, highlighting the autoencoder's capacity to deduce the compact
representation and the neural network classifier's ability to correctly label
breast cancer patients.
|
[{'version': 'v1', 'created': 'Sat, 6 Nov 2021 17:15:35 GMT'}
{'version': 'v2', 'created': 'Tue, 9 Nov 2021 20:01:48 GMT'}]
|
2021-11-11
|
[array(['Rajpal', 'Sheetal', ''], dtype=object)
array(['Kumar', 'Virendra', ''], dtype=object)
array(['Agarwal', 'Manoj', ''], dtype=object)
array(['Kumar', 'Naveen', ''], dtype=object)]
|
6,092 |
1806.10817
|
Elizabeth Marcellina
|
Elizabeth Marcellina, Ashwin Srinivasan, Dmitry Miserev, Andrew
Croxall, David Ritchie, Ian Farrer, Oleg Sushkov, Dimitrie Culcer, Alex
Hamilton
|
Electrical control of the Zeeman spin splitting in two-dimensional hole
systems
| null | null |
10.1103/PhysRevLett.121.077701
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Semiconductor holes with strong spin-orbit coupling allow all-electrical spin
control, with broad applications ranging from spintronics to quantum
computation. Using a two-dimensional hole system in a GaAs quantum well, we
demonstrate a new mechanism of electrically controlling the Zeeman splitting,
which is achieved through altering the hole wave vector $k$. We find a
threefold enhancement of the in-plane $g-$factor $g_{\parallel}(k)$. We
introduce a new method for quantifying the Zeeman splitting from
magnetoresistance measurements, since the conventional tilted field approach
fails for two-dimensional systems with strong spin-orbit coupling. Finally, we
show that the Rashba spin-orbit interaction suppresses the in-plane Zeeman
interaction at low magnetic fields. The ability to control the Zeeman splitting
with electric fields opens up new possibilities for future quantum spin-based
devices, manipulating non-Abelian geometric phases, and realising Majorana
systems in $p-$type superconductor systems.
|
[{'version': 'v1', 'created': 'Thu, 28 Jun 2018 08:17:35 GMT'}]
|
2018-10-04
|
[array(['Marcellina', 'Elizabeth', ''], dtype=object)
array(['Srinivasan', 'Ashwin', ''], dtype=object)
array(['Miserev', 'Dmitry', ''], dtype=object)
array(['Croxall', 'Andrew', ''], dtype=object)
array(['Ritchie', 'David', ''], dtype=object)
array(['Farrer', 'Ian', ''], dtype=object)
array(['Sushkov', 'Oleg', ''], dtype=object)
array(['Culcer', 'Dimitrie', ''], dtype=object)
array(['Hamilton', 'Alex', ''], dtype=object)]
|
6,093 |
1705.06147
|
Roberto Cavoretto
|
Roberto Cavoretto, Alessandra De Rossi, Roberta Freda, Hanli Qiao,
Ezio Venturino
|
Numerical Methods for Pulmonary Image Registration
| null | null | null | null |
q-bio.QM math.NA physics.med-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Due to complexity and invisibility of human organs, diagnosticians need to
analyze medical images to determine where the lesion region is, and which kind
of disease is, in order to make precise diagnoses. For satisfying clinical
purposes through analyzing medical images, registration plays an essential
role. For instance, in Image-Guided Interventions (IGI) and computer-aided
surgeries, patient anatomy is registered to preoperative images to guide
surgeons complete procedures. Medical image registration is also very useful in
surgical planning, monitoring disease progression and for atlas construction.
Due to the significance, the theories, methods, and implementation method of
image registration constitute fundamental knowledge in educational training for
medical specialists. In this chapter, we focus on image registration of a
specific human organ, i.e. the lung, which is prone to be lesioned. For
pulmonary image registration, the improvement of the accuracy and how to obtain
it in order to achieve clinical purposes represents an important problem which
should seriously be addressed. In this chapter, we provide a survey which
focuses on the role of image registration in educational training together with
the state-of-the-art of pulmonary image registration. In the first part, we
describe clinical applications of image registration introducing artificial
organs in Simulation-based Education. In the second part, we summarize the
common methods used in pulmonary image registration and analyze popular papers
to obtain a survey of pulmonary image registration.
|
[{'version': 'v1', 'created': 'Tue, 16 May 2017 06:42:08 GMT'}]
|
2017-05-18
|
[array(['Cavoretto', 'Roberto', ''], dtype=object)
array(['De Rossi', 'Alessandra', ''], dtype=object)
array(['Freda', 'Roberta', ''], dtype=object)
array(['Qiao', 'Hanli', ''], dtype=object)
array(['Venturino', 'Ezio', ''], dtype=object)]
|
6,094 |
hep-ph/9605445
|
Georgi Dvali
|
Gia Dvali
|
Natural Inflation in SUSY and Gauge-Mediated Curvature of the Flat
Directions
|
18 pages, Latex, 1 figure
|
Phys.Lett. B387 (1996) 471-477
|
10.1016/0370-2693(96)01063-5
|
CERN-TH/96-129
|
hep-ph astro-ph
| null |
Supersymmetric theories often include the non-compact directions in the field
space along which the tree level potential grows only up to a certain limited
value (determined by the mass scale of the theory) and then stays constant for
the arbitrarily large expectation value of the field parametrizing the
direction. Above the critical value, the tree-level curvature is large and
positive in the other directions. Such plateaux are natural candidates for the
hybrid inflaton. The non-zero F-term density along the plateau spontaneously
breaks SUSY and induces the one-loop logarithmic slope for the inflaton
potential. The coupling of the inflaton to the Higgs fields in the complex
representations of the gauge group, may result in a radiatively induced
Fayet--Iliopoulos D-term during inflation, which destabilizes some of the
squark and slepton flat directions. Corresponding soft masses can be larger
than the Hubble parameter and thus, play a crucial role for the Affleck--Dine
baryogenesis.
|
[{'version': 'v1', 'created': 'Thu, 30 May 1996 20:11:06 GMT'}]
|
2009-10-28
|
[array(['Dvali', 'Gia', ''], dtype=object)]
|
6,095 |
2306.04353
|
Nicola Asuni
|
Nicola Asuni
|
Reversible Numeric Composite Key (RNCK)
|
5 pages
| null | null | null |
cs.DB
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In database design, Composite Keys are used to uniquely identify records and
prevent data duplication. However, they require more memory and storage space
than single keys, and can make queries more CPU-intensive. Surrogate Keys are
an alternative that can overcome some of these limitations, but they can also
introduce new disadvantages. To address these challenges, a new type of key
called a Reversible Numeric Composite Key (RNCK) has been developed. RNCK is a
single number that encodes multiple data attributes, and can be decoded back to
the original values. This makes it possible to achieve the benefits of both
Composite Keys and Surrogate Keys, while overcoming some of their limitations.
RNCK has been shown to improve query performance and reduce memory and storage
requirements. It can be used in relational databases, large static datasets,
and key-value caching systems. RNCK has been successfully used in production
systems for several years.
|
[{'version': 'v1', 'created': 'Wed, 7 Jun 2023 11:35:46 GMT'}]
|
2023-06-08
|
[array(['Asuni', 'Nicola', ''], dtype=object)]
|
6,096 |
1710.11342
|
Zhengli Zhao
|
Zhengli Zhao, Dheeru Dua, Sameer Singh
|
Generating Natural Adversarial Examples
|
Published as a conference paper at the International Conference on
Learning Representations (ICLR) 2018
| null | null | null |
cs.LG cs.AI cs.CL cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Due to their complex nature, it is hard to characterize the ways in which
machine learning models can misbehave or be exploited when deployed. Recent
work on adversarial examples, i.e. inputs with minor perturbations that result
in substantially different model predictions, is helpful in evaluating the
robustness of these models by exposing the adversarial scenarios where they
fail. However, these malicious perturbations are often unnatural, not
semantically meaningful, and not applicable to complicated domains such as
language. In this paper, we propose a framework to generate natural and legible
adversarial examples that lie on the data manifold, by searching in semantic
space of dense and continuous data representation, utilizing the recent
advances in generative adversarial networks. We present generated adversaries
to demonstrate the potential of the proposed approach for black-box classifiers
for a wide range of applications such as image classification, textual
entailment, and machine translation. We include experiments to show that the
generated adversaries are natural, legible to humans, and useful in evaluating
and analyzing black-box classifiers.
|
[{'version': 'v1', 'created': 'Tue, 31 Oct 2017 06:22:26 GMT'}
{'version': 'v2', 'created': 'Fri, 23 Feb 2018 23:28:31 GMT'}]
|
2018-02-27
|
[array(['Zhao', 'Zhengli', ''], dtype=object)
array(['Dua', 'Dheeru', ''], dtype=object)
array(['Singh', 'Sameer', ''], dtype=object)]
|
6,097 |
1604.02212
|
Yong Xia
|
Shu Wang, Yong Xia
|
On the Ball-Constrained Weighted Maximin Dispersion Problem
|
26 pages
| null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The ball-constrained weighted maximin dispersion problem $(\rm P_{ball})$ is
to find a point in an $n$-dimensional Euclidean ball such that the minimum of
the weighted Euclidean distance from given $m$ points is maximized. We propose
a new second-order cone programming relaxation for $(\rm P_{ball})$. Under the
condition $m\le n$, $(\rm P_{ball})$ is polynomial-time solvable since the new
relaxation is shown to be tight. In general, we prove that $({\rm P_{ball}})$
is NP-hard. Then, we propose a new randomized approximation algorithm for
solving $({\rm P_{ball}})$, which provides a new approximation bound of
$\frac{1-O(\sqrt{\ln(m)/n})}{2}$.
|
[{'version': 'v1', 'created': 'Fri, 8 Apr 2016 02:11:50 GMT'}]
|
2016-04-11
|
[array(['Wang', 'Shu', ''], dtype=object)
array(['Xia', 'Yong', ''], dtype=object)]
|
6,098 |
1807.06959
|
Tim Dietrich
|
Tim Dietrich and Serguei Ossokine and Katy Clough
|
Full 3D Numerical Relativity Simulations of Neutron Star -- Boson Star
Collisions with BAM
| null | null |
10.1088/1361-6382/aaf43e
| null |
gr-qc astro-ph.HE hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
With the first direct detections of gravitational waves (GWs) from the
coalescence of compact binaries observed by the advanced LIGO and VIRGO
interferometers, the era of GW astronomy has begun. Whilst there is strong
evidence that the observed GWs are connected to the merger of two black holes
(BH) or two neutron stars (NS), future detections may present a less consistent
picture. Indeed, the possibility that the observed GW signal was created by a
merger of exotic compact objects (ECOs) such as boson stars (BS) or axion stars
(AS) has not yet been fully excluded. For a detailed understanding of the late
stages of the coalescence full 3D numerical relativity simulations are
essential. In this paper, we extend the infrastructure of the numerical
relativity code BAM, to permit the simultaneous simulation of baryonic matter
with bosonic scalar fields, thus enabling the study of BS-BS, BS-NS, and BS-BH
mergers. We present a large number of single star evolutions to test the newly
implemented routines, and to quantify the numerical challenges of such
simulations, which we find to partially differ from the default NS case. We
also compare head-on BS-BS simulations with independent numerical relativity
codes, namely the SpEC and the GRChombo codes, and find good general agreement.
Finally, we present what are, to the best of our knowledge, the first full NR
simulations of BS-NS mergers, a first step towards identifying the hallmarks of
BS-NS interactions in the strong gravity regime, as well as possible GW and
electromagnetic observables.
|
[{'version': 'v1', 'created': 'Wed, 18 Jul 2018 14:22:20 GMT'}]
|
2019-01-09
|
[array(['Dietrich', 'Tim', ''], dtype=object)
array(['Ossokine', 'Serguei', ''], dtype=object)
array(['Clough', 'Katy', ''], dtype=object)]
|
6,099 |
2108.03733
|
Sang Truong
|
Sang Truong and Humberto Barreto
|
Visualizing Income Distribution in the United States
| null | null | null | null |
econ.GN q-fin.EC stat.AP
|
http://creativecommons.org/licenses/by/4.0/
|
The distribution of household income is a central concern of modern economic
policy due to its strong influence on life quality. Yet, non-expert audiences
are unaware of the relationship between these two factors. To effectively
communicate the effect of income inequality on the quality of life and among
the strata, we have designed a novel technique for visualizing income
distribution and inequality over time by using the U.S. household income
microdata from the Current Population Survey. The result is a striking dynamic
animation of income distribution over time, drawing public attention and
further investigating economic inequality. Detailed implementation of this
project is available at https://github.com/sangttruong/incomevis.
|
[{'version': 'v1', 'created': 'Sun, 8 Aug 2021 20:58:28 GMT'}]
|
2021-08-10
|
[array(['Truong', 'Sang', ''], dtype=object)
array(['Barreto', 'Humberto', ''], dtype=object)]
|
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