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|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3,800 |
2009.14530
|
Yimian Dai
|
Yimian Dai and Yiquan Wu and Fei Zhou and Kobus Barnard
|
Asymmetric Contextual Modulation for Infrared Small Target Detection
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Single-frame infrared small target detection remains a challenge not only due
to the scarcity of intrinsic target characteristics but also because of lacking
a public dataset. In this paper, we first contribute an open dataset with
high-quality annotations to advance the research in this field. We also propose
an asymmetric contextual modulation module specially designed for detecting
infrared small targets. To better highlight small targets, besides a top-down
global contextual feedback, we supplement a bottom-up modulation pathway based
on point-wise channel attention for exchanging high-level semantics and subtle
low-level details. We report ablation studies and comparisons to
state-of-the-art methods, where we find that our approach performs
significantly better. Our dataset and code are available online.
|
[{'version': 'v1', 'created': 'Wed, 30 Sep 2020 09:30:08 GMT'}]
|
2020-10-01
|
[array(['Dai', 'Yimian', ''], dtype=object)
array(['Wu', 'Yiquan', ''], dtype=object)
array(['Zhou', 'Fei', ''], dtype=object)
array(['Barnard', 'Kobus', ''], dtype=object)]
|
3,801 |
1711.09881
|
Jakob Hultgren
|
Jakob Hultgren
|
Coupled K\"ahler-Ricci solitons on toric Fano manifolds
|
29 pages. Changed title. Added example of coupled K\"ahler-Einstein
metric on manifold that don't admit K\"ahler-Einstein metrics
|
Analysis & PDE 12 (2019) 2067-2094
|
10.2140/apde.2019.12.2067
| null |
math.DG math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove a necessary and sufficient condition in terms of the barycenters of
a collection of polytopes for existence of coupled K\"ahler-Einstein metrics on
toric Fano manifolds. This confirms the toric case of a coupled version of the
Yau-Tian-Donaldson conjecture. We also obtain a necessary and sufficient
condition for existence of torus-invariant solutions to a system of soliton
type equations on toric Fano manifolds. Some of these solutions provide natural
candidates for the large time limits of a certain geometric flow generalizing
the K\"ahler-Ricci flow.
|
[{'version': 'v1', 'created': 'Mon, 27 Nov 2017 18:53:45 GMT'}
{'version': 'v2', 'created': 'Fri, 5 Oct 2018 12:47:01 GMT'}]
|
2019-10-30
|
[array(['Hultgren', 'Jakob', ''], dtype=object)]
|
3,802 |
hep-lat/9210037
|
Gerhard Gompper
|
G. Gompper and D.M. Kroll
|
The Shape of Inflated Vesicles
|
18 pages
| null |
10.1103/PhysRevA.46.7466
| null |
hep-lat cond-mat
| null |
The conformation and scaling properties of self-avoiding fluid vesicles with
zero extrinsic bending rigidity subject to an internal pressure increment
$\Delta p>0$ are studied using Monte Carlo methods and scaling arguments. With
increasing pressure, there is a first-order transition from a collapsed
branched polymer phase to an extended inflated phase. The scaling behavior of
the radius of gyration, the asphericities, and several other quantities
characterizing the average shape of a vesicle are studied in detail. In the
inflated phase, continuously variable fractal shapes are found to be controlled
by the scaling variable $x=\Delta p N^{3\nu/2}$ (or equivalently, $y = {<V>}/
N^{3\nu/2}$), where $N$ is the number of monomers in the vesicle and $V$ the
enclosed volume. The scaling behavior in the inflated phase is described by a
new exponent $\nu=0.787\pm 0.02$.
|
[{'version': 'v1', 'created': 'Wed, 28 Oct 1992 16:59:37 GMT'}]
|
2009-10-22
|
[array(['Gompper', 'G.', ''], dtype=object)
array(['Kroll', 'D. M.', ''], dtype=object)]
|
3,803 |
2008.12609
|
Christian-Marcel Schmied
|
C.-M. Schmied and P. G. Kevrekidis
|
Dark-Antidark Spinor Solitons in Spin-1 Bose Gases
|
12 pages, 14 figures, published version
|
Phys. Rev. A 102, 053323 (2020)
|
10.1103/PhysRevA.102.053323
| null |
cond-mat.quant-gas nlin.PS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a one-dimensional trapped spin-1 Bose gas and numerically explore
families of its solitonic solutions, namely antidark-dark-antidark (ADDAD), as
well as dark-antidark-dark (DADD) solitary waves. Their existence and stability
properties are systematically investigated within the experimentally accessible
easy-plane ferromagnetic phase by means of a continuation over the atom number
as well as the quadratic Zeeman energy. It is found that ADDADs are
substantially more dynamically robust than DADDs. The latter are typically
unstable within the examined parameter range. The dynamical evolution of both
of these states is explored and the implication of their potential unstable
evolution is studied. Some of the relevant observed possibilities involve,
e.g., symmetry-breaking instability manifestations for the ADDAD, as well as
splitting of the DADD into a right- and a left-moving dark-antidark pair with
the anti-darks residing in a different component as compared to prior to the
splitting. In the latter case, the structures are seen to disperse upon
long-time propagation.
|
[{'version': 'v1', 'created': 'Fri, 28 Aug 2020 12:26:34 GMT'}
{'version': 'v2', 'created': 'Mon, 7 Dec 2020 15:05:17 GMT'}]
|
2020-12-08
|
[array(['Schmied', 'C. -M.', ''], dtype=object)
array(['Kevrekidis', 'P. G.', ''], dtype=object)]
|
3,804 |
0807.4794
|
Bal\'azs D\'ora
|
B. D\'ora, K. Ziegler, P. Thalmeier, M. Nakamura
|
Rabi Oscillations in Landau-Quantized Graphene
|
5 pages, 4 figures
|
Phys. Rev. Lett. 102, 036803 (2009)
|
10.1103/PhysRevLett.102.036803
| null |
cond-mat.mes-hall cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the relation between the canonical model of quantum optics,
the Jaynes-Cummings Hamiltonian and Dirac fermions in quantizing magnetic
field. We demonstrate that Rabi oscillations are observable in the optical
response of graphene, providing us with a transparent picture about the
structure of optical transitions. While the longitudinal conductivity reveals
chaotic Rabi oscillations, the Hall component measures coherent ones. This
opens up the possibility of investigating a microscopic model of a few quantum
objects in a macroscopic experiment with tunable parameters.
|
[{'version': 'v1', 'created': 'Wed, 30 Jul 2008 07:03:55 GMT'}
{'version': 'v2', 'created': 'Thu, 31 Jan 2013 20:06:48 GMT'}]
|
2013-02-01
|
[array(['Dóra', 'B.', ''], dtype=object)
array(['Ziegler', 'K.', ''], dtype=object)
array(['Thalmeier', 'P.', ''], dtype=object)
array(['Nakamura', 'M.', ''], dtype=object)]
|
3,805 |
nlin/0602030
|
E. N. Tsoy
|
E. N. Tsoy and N. Akhmediev
|
Bifurcations from stationary to pulsating solitons in the cubic-quintic
complex Ginzburg-Landau equation
|
10 pages, 4 figures
|
Phys. Lett. A, V.343, N.6, 417-422 (2005)
|
10.1016/j.physleta.2005.05.102
| null |
nlin.PS
| null |
Stationary to pulsating soliton bifurcation analysis of the complex
Ginzburg-Landau equation (CGLE) is presented. The analysis is based on a
reduction from an infinite-dimensional dynamical dissipative system to a
finite-dimensional model. Stationary solitons, with constant amplitude and
width, are associated with fixed points in the model. For the first time,
pulsating solitons are shown to be stable limit cycles in the
finite-dimensional dynamical system. The boundaries between the two types of
solutions are obtained approximately from the reduced model. These boundaries
are reasonably close to those predicted by direct numerical simulations of the
CGLE.
|
[{'version': 'v1', 'created': 'Tue, 14 Feb 2006 16:16:10 GMT'}]
|
2009-11-11
|
[array(['Tsoy', 'E. N.', ''], dtype=object)
array(['Akhmediev', 'N.', ''], dtype=object)]
|
3,806 |
1412.1849
|
Nikolai Zarkevich
|
Nikolai A. Zarkevich, Duane D. Johnson
|
Coexistence pressure for a martensitic transformation from theory and
experiment: revisiting the bcc-hcp transition of iron under pressure
|
8 pages, 1 figure, 202 citations
|
Phys. Rev. B 91, 174104 (2015)
|
10.1103/PhysRevB.91.174104
| null |
cond-mat.mtrl-sci astro-ph.EP cond-mat.other physics.comp-ph physics.geo-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The coexistence pressure of two phases is a well-defined point at fixed
temperature. In experiment, however, due to non-hydrostatic stresses and a
stress-dependent potential energy barrier, different measurements yield
different ranges of pressure with a hysteresis. Accounting for these effects,
we propose an inequality for comparison of the theoretical value to a plurality
of measured intervals. We revisit decades of pressure experiments on the bcc -
hcp transformations in iron, which are sensitive to non-hydrostatic conditions
and sample size. From electronic-structure calculations, we find a bcc - hcp
coexistence pressure of 8.4 GPa. We construct the equation of state for
competing phases under hydrostatic pressure, compare to experiments and other
calculations, and address the observed pressure hysteresis and range of onset
pressures of the nucleating phase.
|
[{'version': 'v1', 'created': 'Thu, 4 Dec 2014 21:49:14 GMT'}
{'version': 'v2', 'created': 'Fri, 19 Dec 2014 00:56:19 GMT'}]
|
2017-11-28
|
[array(['Zarkevich', 'Nikolai A.', ''], dtype=object)
array(['Johnson', 'Duane D.', ''], dtype=object)]
|
3,807 |
2001.11034
|
Xian-Min Jin
|
Yong-Heng Lu, Yao Wang, Yi-Jun Chang, Zhan-Ming Li, Wen-Hao Cui, Jun
Gao, Wen-Hao Zhou, Hang Zheng, Xian-Min Jin
|
Observing Movement of Dirac Cones from Single-Photon Dynamics
|
7 pages, 4 figures, Comments welcome
|
Phys. Rev. B 103, 064304 (2021)
|
10.1103/PhysRevB.103.064304
| null |
cond-mat.mes-hall cond-mat.mtrl-sci physics.optics quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Graphene with honeycomb structure, being critically important in
understanding physics of matter, exhibits exceptionally unusual half-integer
quantum Hall effect and unconventional electronic spectrum with quantum
relativistic phenomena. Particularly, graphene-like structure can be used for
realizing topological insulator which inspires an intrinsic topological
protection mechanism with strong immunity for maintaining coherence of quantum
information. These various peculiar physics arise from the unique properties of
Dirac cones which show high hole degeneracy, massless charge carriers and
linear intersection of bands. Experimental observation of Dirac cones
conventionally focuses on the energy-momentum space with bulk measurement.
Recently, the wave function and band structure have been mapped into the
real-space in photonic system, and made flexible control possible. Here, we
demonstrate a direct observation of the movement of Dirac cones from
single-photon dynamics in photonic graphene under different biaxial strains.
Sharing the same spirit of wave-particle nature in quantum mechanics, we
identify the movement of Dirac cones by dynamically detecting the edge modes
and extracting the diffusing distance of the packets with accumulation and
statistics on individual single-particle registrations. Our results of
observing movement of Dirac cones from single-photon dynamics, together with
the method of direct observation in real space by mapping the band structure
defined in momentum space, pave the way to understand a variety of artificial
structures in quantum regime.
|
[{'version': 'v1', 'created': 'Wed, 29 Jan 2020 19:00:02 GMT'}]
|
2021-02-10
|
[array(['Lu', 'Yong-Heng', ''], dtype=object)
array(['Wang', 'Yao', ''], dtype=object)
array(['Chang', 'Yi-Jun', ''], dtype=object)
array(['Li', 'Zhan-Ming', ''], dtype=object)
array(['Cui', 'Wen-Hao', ''], dtype=object)
array(['Gao', 'Jun', ''], dtype=object)
array(['Zhou', 'Wen-Hao', ''], dtype=object)
array(['Zheng', 'Hang', ''], dtype=object)
array(['Jin', 'Xian-Min', ''], dtype=object)]
|
3,808 |
2301.03717
|
Todd Gingrich
|
Schuyler B. Nicholson and Todd R. Gingrich
|
Quantifying Rare Events in Stochastic Reaction-Diffusion Dynamics Using
Tensor Networks
| null | null | null | null |
cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The interplay between stochastic chemical reactions and diffusion can
generate rich spatiotemporal patterns. While the timescale for individual
reaction or diffusion events may be very fast, the timescales for organization
can be much longer. That separation of timescales makes it particularly
challenging to anticipate how the rapid microscopic dynamics gives rise to
macroscopic rates in the non-equilibrium dynamics of many reacting and
diffusing chemical species. Within the regime of stochastic fluctuations, the
standard approach is to employ Monte Carlo sampling to simulate realizations of
random trajectories. Here, we present an alternative numerically tractable
approach to extract macroscopic rates from the full ensemble evolution of
many-body reaction diffusion problems. The approach leverages the Doi-Peliti
second-quantized representation of reaction-diffusion master equations along
with compression and evolution algorithms from tensor networks. By focusing on
a Schl\"{o}gl model with one-dimensional diffusion between $L$ otherwise
well-mixed sites, we illustrate the potential of the tensor network approach to
compute rates from many-body systems, here with approximately $3 \times
10^{15}$ microstates. Specifically, we compute the rate for switching between
metastable macrostates, with the time to compute those rates growing
subexponentially in $L$. Because we directly work with ensemble evolutions, we
crucially bypass many of the difficulties encountered by rare event sampling
techniques$\unicode{x2013}$detailed balance and reaction coordinates are not
needed.
|
[{'version': 'v1', 'created': 'Mon, 9 Jan 2023 23:25:11 GMT'}]
|
2023-01-11
|
[array(['Nicholson', 'Schuyler B.', ''], dtype=object)
array(['Gingrich', 'Todd R.', ''], dtype=object)]
|
3,809 |
1612.01547
|
Michael Geracie
|
Michael Geracie
|
Transport in Superfluid Mixtures
|
17 pages, 3 figures
|
Phys. Rev. B 95, 134510 (2017)
|
10.1103/PhysRevB.95.134510
| null |
cond-mat.other cond-mat.supr-con hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a general method for constructing effective field theories for
non-relativistic superfluids, generalizing the previous approaches of Greiter,
Witten, and Wilczek, and Son and Wingate to the case of several superfluids in
solution. We investigate transport in mixtures with broken parity and find a
parity odd "Hall drag" in the presence of independent motion as well as a
pinning of mass, charge, and energy to sites of nonzero relative velocity. Both
effects have a simple geometric interpretation in terms of the signed volumes
and directed areas of various sub-complexes of a "velocity polyhedron": the
convex hull formed by the endpoints of the velocity vectors of a superfluid
mixture. We also provide a simple quasi-one-dimensional model that exhibits
non-zero Hall drag.
|
[{'version': 'v1', 'created': 'Mon, 5 Dec 2016 21:07:45 GMT'}]
|
2017-04-19
|
[array(['Geracie', 'Michael', ''], dtype=object)]
|
3,810 |
0811.2521
|
Szu-yu Sophie Chen
|
Szu-yu Sophie Chen (IAS and Berkeley)
|
Conformal Deformation on Manifolds with Boundary
|
38 pages
| null | null | null |
math.DG math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider natural conformal invariants arising from the Gauss-Bonnet
formulas on manifolds with boundary, and study conformal deformation problems
associated to them. The key technique we used is to derive boundary C^2
estimates directly from C^0 estimates for fully nonlinear equations. The main
result has appeared in the author's thesis.
|
[{'version': 'v1', 'created': 'Sat, 15 Nov 2008 19:42:03 GMT'}]
|
2008-11-18
|
[array(['Chen', 'Szu-yu Sophie', '', 'IAS and Berkeley'], dtype=object)]
|
3,811 |
1711.10724
|
Sohrab Valizadeh
|
Sohrab Valizadeh, Abdollah Borhanifar
|
General matrix transform method for the Riesz space fractional
advection-dispersion equations
|
21 Pages, 8 figures, this work has not been presented or published as
an article right now
| null | null | null |
math.NA cs.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, a mixed high order finite difference scheme-Pad\'{e}
approximation method is applied to obtain numerical solution of the Riesz
fractional advection-dispersion equation. This method is based on the high
order finite difference scheme that derived from fractional centered difference
and Pad\'{e} approximation method for space and time integration, respectively.
The stability analysis of the proposed method is discussed via theoretical
matrix analysis. Numerical experiments are carried out to confirm the
theoretical results of the proposed method.
|
[{'version': 'v1', 'created': 'Wed, 29 Nov 2017 08:35:49 GMT'}
{'version': 'v2', 'created': 'Tue, 25 May 2021 13:36:40 GMT'}]
|
2021-05-26
|
[array(['Valizadeh', 'Sohrab', ''], dtype=object)
array(['Borhanifar', 'Abdollah', ''], dtype=object)]
|
3,812 |
1609.00626
|
Shinichi Nakajima
|
Shinichi Nakajima, Sebastian Krause, Dirk Weissenborn, Sven Schmeier,
Nico Goernitz, Feiyu Xu
|
SynsetRank: Degree-adjusted Random Walk for Relation Identification
| null | null | null | null |
cs.CL stat.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In relation extraction, a key process is to obtain good detectors that find
relevant sentences describing the target relation. To minimize the necessity of
labeled data for refining detectors, previous work successfully made use of
BabelNet, a semantic graph structure expressing relationships between synsets,
as side information or prior knowledge. The goal of this paper is to enhance
the use of graph structure in the framework of random walk with a few
adjustable parameters. Actually, a straightforward application of random walk
degrades the performance even after parameter optimization. With the insight
from this unsuccessful trial, we propose SynsetRank, which adjusts the initial
probability so that high degree nodes influence the neighbors as strong as low
degree nodes. In our experiment on 13 relations in the FB15K-237 dataset,
SynsetRank significantly outperforms baselines and the plain random walk
approach.
|
[{'version': 'v1', 'created': 'Fri, 2 Sep 2016 14:42:18 GMT'}
{'version': 'v2', 'created': 'Thu, 15 Sep 2016 22:46:29 GMT'}]
|
2016-09-19
|
[array(['Nakajima', 'Shinichi', ''], dtype=object)
array(['Krause', 'Sebastian', ''], dtype=object)
array(['Weissenborn', 'Dirk', ''], dtype=object)
array(['Schmeier', 'Sven', ''], dtype=object)
array(['Goernitz', 'Nico', ''], dtype=object)
array(['Xu', 'Feiyu', ''], dtype=object)]
|
3,813 |
1706.00746
|
Peng Fu
|
Peng Fu
|
Representing Nonterminating Rewriting with $\mathbf{F}_2^\mu$
| null | null | null | null |
cs.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We specify a second-order type system $\mathbf{F}_2^\mu$ that is tailored for
representing nonterminations. The nonterminating trace of a term $t$ in a
rewrite system $\mathcal{R}$ corresponds to a productive inhabitant $e$ such
that $\Gamma_{\mathcal{R}} \vdash e : t$ in $\mathbf{F}_2^\mu$, where
$\Gamma_{\mathcal{R}}$ is the environment representing the rewrite system. We
prove that the productivity checking in $\mathbf{F}_2^\mu$ is decidable via a
mapping to the $\lambda$-Y calculus. We develop a type checking algorithm for
$\mathbf{F}_2^\mu$ based on second-order matching. We implement the type
checking algorithm in a proof-of-concept type checker.
|
[{'version': 'v1', 'created': 'Fri, 2 Jun 2017 16:42:52 GMT'}]
|
2017-06-05
|
[array(['Fu', 'Peng', ''], dtype=object)]
|
3,814 |
0909.3116
|
Sudhir Vempati
|
Joydeep Chakrabortty, Anjan S. Joshipura, Poonam Mehta and Sudhir K.
Vempati
|
Maximal mixing as a `sum' of small mixings
|
23 pages, no figures
| null | null |
RECAPP-HRI-2009-016
|
hep-ph
|
http://creativecommons.org/licenses/publicdomain/
|
In models with two sources of neutrino masses, we look at the possibility of
generating maximal/large mixing angles in the total mass matrix, where both the
sources have only small mixing angles. We show that in the two generation case,
maximal mixing can naturally arise only when the total neutrino mass matrix has
a quasi-degenerate pattern. The best way to demonstrate this is by decomposing
the quasi-degenerate spectrum in to hierarchial and inverse-hierarchial mass
matrices, both with small mixing. Such a decomposition of the quasi-degenerate
spectra is in fact very general and can be done irrespective of the mixing
present in the mass matrices. With three generations, and two sources, we show
that only one or all the three small mixing angles in the total neutrino mass
matrix can be converted to maximal/large mixing angles. The decomposition of
the degenerate pattern in this case is best realised in to sub-matrices whose
dominant eigenvalues have an alternating pattern. On the other hand, it is
possible to generate two large and one small mixing angle if either one or both
of the sub-matrices contain maximal mixing. We present example textures of
this. With three sources of neutrino masses, the results remain almost the same
as long as all the sub-matrices contribute equally. The Left-Right Symmetric
model where Type I and Type II seesaw mechanisms are related provides a
framework where small mixings can be converted to large mixing angles, for
degenerate neutrinos.
|
[{'version': 'v1', 'created': 'Thu, 17 Sep 2009 16:59:11 GMT'}]
|
2009-09-18
|
[array(['Chakrabortty', 'Joydeep', ''], dtype=object)
array(['Joshipura', 'Anjan S.', ''], dtype=object)
array(['Mehta', 'Poonam', ''], dtype=object)
array(['Vempati', 'Sudhir K.', ''], dtype=object)]
|
3,815 |
1902.02283
|
Alice Cortinovis
|
Alice Cortinovis, Daniel Kressner, Stefano Massei
|
On maximum volume submatrices and cross approximation for symmetric
semidefinite and diagonally dominant matrices
| null | null | null | null |
math.NA cs.DM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The problem of finding a $k \times k$ submatrix of maximum volume of a matrix
$A$ is of interest in a variety of applications. For example, it yields a
quasi-best low-rank approximation constructed from the rows and columns of $A$.
We show that such a submatrix can always be chosen to be a principal submatrix
if $A$ is symmetric semidefinite or diagonally dominant. Then we analyze the
low-rank approximation error returned by a greedy method for volume
maximization, cross approximation with complete pivoting. Our bound for general
matrices extends an existing result for symmetric semidefinite matrices and
yields new error estimates for diagonally dominant matrices. In particular, for
doubly diagonally dominant matrices the error is shown to remain within a
modest factor of the best approximation error. We also illustrate how the
application of our results to cross approximation for functions leads to new
and better convergence results.
|
[{'version': 'v1', 'created': 'Wed, 6 Feb 2019 17:19:04 GMT'}]
|
2019-02-07
|
[array(['Cortinovis', 'Alice', ''], dtype=object)
array(['Kressner', 'Daniel', ''], dtype=object)
array(['Massei', 'Stefano', ''], dtype=object)]
|
3,816 |
1802.07367
|
Bryan VanSaders
|
Bryan VanSaders, Julia Dshemuchadse, and Sharon C. Glotzer
|
Strain Fields in Repulsive Colloidal Crystals
| null |
Phys. Rev. Materials 2, 063604 (2018)
|
10.1103/PhysRevMaterials.2.063604
| null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The concept of a local linear elastic strain field is commonly used in the
metallurgical research community to approximate the collective effect of atomic
displacements around crystalline defects. Here we show that the elastic strain
field approximation is a useful tool in colloidal systems. For colloidal
crystals with repulsive particle interaction potentials, given similar
mechanical properties, sharper potentials lead to: 1) free energies of
deformation dominated by entropy, 2) lower variance in strain field
fluctuations, 3) increased tension-compression asymmetry near dislocation core
regions, and 4) smaller windows of applicability of the linear elastic
approximation. We show that the window of linear behavior for entropic
colloidal crystals is broadened for pressures at which the inter-particle
separation sufficiently exceeds the range of steep repulsive interactions.
|
[{'version': 'v1', 'created': 'Tue, 20 Feb 2018 22:51:42 GMT'}]
|
2018-06-27
|
[array(['VanSaders', 'Bryan', ''], dtype=object)
array(['Dshemuchadse', 'Julia', ''], dtype=object)
array(['Glotzer', 'Sharon C.', ''], dtype=object)]
|
3,817 |
1408.4016
|
Larry Zamick
|
Matthew Harper and Larry Zamick
|
J=0 T=1 Pairing Interaction Selection Rules
| null |
Phys. Rev. C 91,014304 (2015)
|
10.1103/PhysRevC.91.014304
| null |
nucl-th nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Wave functions arising form a pairing Hamiltonian E(0) i,e, one in which the
interaction is only between J=0^{+}T=1 pairs, lead to magnetic dipole and
Gamow-Teller transition rates that are much larger than those from an
interaction E(J_{max}) in which a proton and a neutron couple to J=2j. With
realistic interactions the results are in between the 2 extremes. In the course
of this study we found that certain M1 and GT matrix elements vanish with E(0)
. These are connected to seniority and reduced isospin isospin selection rules.
We find the surprising result that The M1 strength to the single j scissors is
larger for a J=0 T=1 pairing interaction than it is for Q.Q.
|
[{'version': 'v1', 'created': 'Mon, 18 Aug 2014 14:17:11 GMT'}
{'version': 'v10', 'created': 'Thu, 30 Oct 2014 17:04:55 GMT'}
{'version': 'v11', 'created': 'Mon, 3 Nov 2014 12:37:11 GMT'}
{'version': 'v12', 'created': 'Wed, 12 Nov 2014 16:34:58 GMT'}
{'version': 'v13', 'created': 'Fri, 14 Nov 2014 19:37:26 GMT'}
{'version': 'v14', 'created': 'Wed, 19 Nov 2014 15:31:51 GMT'}
{'version': 'v15', 'created': 'Wed, 26 Nov 2014 20:11:46 GMT'}
{'version': 'v16', 'created': 'Mon, 1 Dec 2014 13:28:22 GMT'}
{'version': 'v17', 'created': 'Sun, 10 May 2015 17:21:36 GMT'}
{'version': 'v2', 'created': 'Wed, 20 Aug 2014 03:10:09 GMT'}
{'version': 'v3', 'created': 'Mon, 8 Sep 2014 18:06:08 GMT'}
{'version': 'v4', 'created': 'Wed, 17 Sep 2014 19:11:36 GMT'}
{'version': 'v5', 'created': 'Sat, 20 Sep 2014 18:32:22 GMT'}
{'version': 'v6', 'created': 'Sun, 5 Oct 2014 18:59:28 GMT'}
{'version': 'v7', 'created': 'Tue, 21 Oct 2014 14:01:11 GMT'}
{'version': 'v8', 'created': 'Wed, 22 Oct 2014 17:42:16 GMT'}
{'version': 'v9', 'created': 'Fri, 24 Oct 2014 00:54:53 GMT'}]
|
2015-06-22
|
[array(['Harper', 'Matthew', ''], dtype=object)
array(['Zamick', 'Larry', ''], dtype=object)]
|
3,818 |
2006.09717
|
Guillermo Ortiz-Jimenez
|
Guillermo Ortiz-Jimenez, Apostolos Modas, Seyed-Mohsen
Moosavi-Dezfooli, Pascal Frossard
|
Neural Anisotropy Directions
|
Accepted to the 34th Conference on Neural Information Processing
Systems (NeurIPS 2020) (39 pages, 22 figures)
| null | null | null |
cs.LG cs.CV stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we analyze the role of the network architecture in shaping the
inductive bias of deep classifiers. To that end, we start by focusing on a very
simple problem, i.e., classifying a class of linearly separable distributions,
and show that, depending on the direction of the discriminative feature of the
distribution, many state-of-the-art deep convolutional neural networks (CNNs)
have a surprisingly hard time solving this simple task. We then define as
neural anisotropy directions (NADs) the vectors that encapsulate the
directional inductive bias of an architecture. These vectors, which are
specific for each architecture and hence act as a signature, encode the
preference of a network to separate the input data based on some particular
features. We provide an efficient method to identify NADs for several CNN
architectures and thus reveal their directional inductive biases. Furthermore,
we show that, for the CIFAR-10 dataset, NADs characterize the features used by
CNNs to discriminate between different classes.
|
[{'version': 'v1', 'created': 'Wed, 17 Jun 2020 08:36:28 GMT'}
{'version': 'v2', 'created': 'Wed, 14 Oct 2020 10:21:58 GMT'}]
|
2020-10-15
|
[array(['Ortiz-Jimenez', 'Guillermo', ''], dtype=object)
array(['Modas', 'Apostolos', ''], dtype=object)
array(['Moosavi-Dezfooli', 'Seyed-Mohsen', ''], dtype=object)
array(['Frossard', 'Pascal', ''], dtype=object)]
|
3,819 |
1506.01642
|
Douadi Drihem
|
Douadi Drihem
|
On the duality of variable Triebel-Lizorkin spaces
|
We reprove Lemma 4. arXiv admin note: substantial text overlap with
arXiv:1503.04011
| null | null | null |
math.FA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The aim of this paper is to prove duality of Triebel-Lizorkin spaces $%
F_{1,q\left( \cdot \right) }^{\alpha \left( \cdot \right) }$. First, we prove
the duality of associated sequence spaces. Then from the so-called $% \varphi
$-transform characterization in the sense of Frazier and Jawerth, we deduce the
main result of this paper.
|
[{'version': 'v1', 'created': 'Thu, 4 Jun 2015 16:32:24 GMT'}
{'version': 'v2', 'created': 'Thu, 30 Jul 2015 09:08:57 GMT'}
{'version': 'v3', 'created': 'Wed, 28 Dec 2016 15:08:14 GMT'}]
|
2016-12-30
|
[array(['Drihem', 'Douadi', ''], dtype=object)]
|
3,820 |
1609.00568
|
Ian Roxburgh Prof
|
Ian W Roxburgh
|
16CygA&B and Kepler Legacy values : Differences between the values of
frequencies by different fitters
|
8 pages, 37 figures. Seismology of the Sun and Distant Stars 2016,
Joint TASC2 & KASC9 Workshop - SPACEINN & HELAS8 Conference 11-15 July 2016,
Angra do Heroismo, Terceira-Azores, Portugal
| null | null | null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The differences between the oscillation frequencies and uncertainty estimates
of a star derived by different fitters can be large, sufficiently large so
that, were one to find a stellar model that fitted one frequency set
($\chi^2\sim 1$), it does not fit an alternative set. I give 21 examples,
comparing frequency sets in common between the Kepler Legacy project and
frequency sets from Appourchaux et al (2014) and Davies et al (2015). For
16CygA&B the differences are large; the $\chi^2$ of the fit of Legacy to
Davies's values ranging from 1.64 to 11.47 for 16CygA and 1.62 to 1.79 for
16CygB, depending on which error estimates are used. I analyse both stars in
some detail applying my own mode fitting code to both the Legacy and Davies's
power spectra and find reasonable agreement with Davies's full frequency sets
and very good agreement between values for modes with signal/noise > 1 ($\chi^2
= 0.06, \chi^2_B=0.03$). But the difference with the Legacy values remains
large even for modes with S/N>1. I also examine the effects of different power
spectra (weighted and unweighted) using the kasoc light curves for Q6-17.2 and
Q7-Q16, the effect of different mode height ratios and different rotational
splitting and inclination.
|
[{'version': 'v1', 'created': 'Fri, 2 Sep 2016 12:23:15 GMT'}]
|
2016-09-05
|
[array(['Roxburgh', 'Ian W', ''], dtype=object)]
|
3,821 |
1811.09173
|
Huiwen Dong
|
Huiwen Dong, Jing Yu, Chuangbai Xiao
|
Dual Reweighted Lp-Norm Minimization for Salt-and-pepper Noise Removal
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The robust principal component analysis (RPCA), which aims to estimate
underlying low-rank and sparse structures from the degraded observation data,
has found wide applications in computer vision. It is usually replaced by the
principal component pursuit (PCP) model in order to pursue the convex property,
leading to the undesirable overshrink problem. In this paper, we propose a dual
weighted lp-norm (DWLP) model with a more reasonable weighting rule and weaker
powers, which greatly generalizes the previous work and provides a better
approximation to the rank minimization problem for original matrix as well as
the l0-norm minimization problem for sparse data. Moreover, an approximate
closed-form solution is introduced to solve the lp-norm minimization, which has
more stability in the nonconvex optimization and provides a more accurate
estimation for the low-rank and sparse matrix recovery problem. We then apply
the DWLP model to remove salt-and-pepper noise by exploiting the image nonlocal
self-similarity. Both qualitative and quantitative experiments demonstrate that
the proposed method outperforms other state-of-the-art methods. In terms of
PSNR evaluation, our DWLP achieves about 7.188dB, 5.078dB, 3.854dB, 2.536dB and
0.158dB improvements over the current WSNM-RPCA under 10\% to 50\%
salt-and-pepper noise with an interval 10\% respectively.
|
[{'version': 'v1', 'created': 'Thu, 22 Nov 2018 13:50:30 GMT'}
{'version': 'v2', 'created': 'Mon, 13 May 2019 08:15:33 GMT'}
{'version': 'v3', 'created': 'Mon, 19 Aug 2019 05:54:52 GMT'}]
|
2019-08-20
|
[array(['Dong', 'Huiwen', ''], dtype=object)
array(['Yu', 'Jing', ''], dtype=object)
array(['Xiao', 'Chuangbai', ''], dtype=object)]
|
3,822 |
2211.06301
|
Paul Oumaziz
|
Evgeniia Lapina (ICA, IMT), Paul Oumaziz (ICA), Robin Bouclier (IMT,
ICA), Jean-Charles Passieux (ICA)
|
A fully non-invasive hybrid IGA/FEM scheme for the analysis of localized
non-linear phenomena
|
Computational Mechanics, Springer Verlag, 2022
| null |
10.1007/s00466-022-02234-2
| null |
math.NA cs.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This work undertakes to combine the interests of IsoGeometric Analysis (IGA)
and standard Finite Element Methods (FEM) for the global/local simulation of
structures. The idea is to adopt a hybrid global-IGA/local-FEM modeling,
thereby benefiting from: (i) the superior geometric description and
per-Degree-Of-Freedom accuracy of IGA for capturing global, regular responses,
and (ii) the ability of FEM to compute local, strongly non-linear or even
singular behaviors. For the sake of minimizing the implementation effort, we
develop a coupling scheme that is fully non-invasive in the sense that the
initial global spline model to be enriched is never modified and the
construction of the coupling operators can be performed using conventional FE
packages. The key ingredient is to express the FEM-to-IGA bridge, based on
B{\'e}zier extraction, to transform the initial global spline interface into a
FE one on which the local FE mesh can be constructed. This allows to resort to
classic FE trace operators to implement the coupling. It results in a strategy
that offers the opportunity to simply couple an isogeometric code with any
robust FE code suitable for the modelling of complex local behaviors. The
method also easily extends in case the users only have at their disposal FE
codes. This is the situation that is considered for the numerical
illustrations. More precisely, we only make use of the FE industrial software
Code Aster to perform efficiently and accurately the hybrid
global-IGA/local-FEM simulation of structures subjected locally to cracks,
contact, friction and delamination.
|
[{'version': 'v1', 'created': 'Mon, 24 Oct 2022 08:22:59 GMT'}]
|
2022-11-14
|
[array(['Lapina', 'Evgeniia', '', 'ICA, IMT'], dtype=object)
array(['Oumaziz', 'Paul', '', 'ICA'], dtype=object)
array(['Bouclier', 'Robin', '', 'IMT,\n ICA'], dtype=object)
array(['Passieux', 'Jean-Charles', '', 'ICA'], dtype=object)]
|
3,823 |
2207.11346
|
Bianca Giaccone
|
Bianca Giaccone, Asher Berlin, Ivan Gonin, Anna Grassellino, Roni
Harnik, Yonatan Kahn, Timergali Khabiboulline, Andrei Lunin, Oleksandr
Melnychuk, Alexander Netepenko, Roman Pilipenko, Yuriy Pischalnikov, Sam
Posen, Oleg Pronitchev, Alex Romanenko, Vyacheslav Yakovlev
|
Design of axion and axion dark matter searches based on ultra high Q SRF
cavities
|
6 pages, 9 figures
| null | null | null |
hep-ex hep-ph physics.acc-ph physics.app-ph
|
http://creativecommons.org/licenses/by/4.0/
|
The Superconducting Quantum Materials and Systems center is developing
searches for dark photons, axions and ALPs with the goal of improving upon the
current state-of-the-art sensitivity. These efforts leverage on Fermi National
Accelerator expertise on ultra-high quality factor superconducting radio
frequency cavities combined with the center research on quantum technology.
Here we focus on multiple axion searches that utilize ~1E10 quality factor
superconducting radio frequency cavities and their resonant modes to enhance
the production and/or detection of axions in the cavity volume. In addition, we
present preliminary results of single-mode and multi-mode nonlinearity
measurements that were carried out as part of an experimental feasibility study
to gain insight on the behavior of the ultra-high quality factor resonators and
the experimental RF system in the regime relevant for axion searches.
|
[{'version': 'v1', 'created': 'Fri, 22 Jul 2022 21:33:35 GMT'}]
|
2022-07-27
|
[array(['Giaccone', 'Bianca', ''], dtype=object)
array(['Berlin', 'Asher', ''], dtype=object)
array(['Gonin', 'Ivan', ''], dtype=object)
array(['Grassellino', 'Anna', ''], dtype=object)
array(['Harnik', 'Roni', ''], dtype=object)
array(['Kahn', 'Yonatan', ''], dtype=object)
array(['Khabiboulline', 'Timergali', ''], dtype=object)
array(['Lunin', 'Andrei', ''], dtype=object)
array(['Melnychuk', 'Oleksandr', ''], dtype=object)
array(['Netepenko', 'Alexander', ''], dtype=object)
array(['Pilipenko', 'Roman', ''], dtype=object)
array(['Pischalnikov', 'Yuriy', ''], dtype=object)
array(['Posen', 'Sam', ''], dtype=object)
array(['Pronitchev', 'Oleg', ''], dtype=object)
array(['Romanenko', 'Alex', ''], dtype=object)
array(['Yakovlev', 'Vyacheslav', ''], dtype=object)]
|
3,824 |
1906.03338
|
Juri Opitz
|
Juri Opitz and Anette Frank
|
Dissecting Content and Context in Argumentative Relation Analysis
|
accepted at 6th Workshop on Argument Mining
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
When assessing relations between argumentative units (e.g., support or
attack), computational systems often exploit disclosing indicators or markers
that are not part of elementary argumentative units (EAUs) themselves, but are
gained from their context (position in paragraph, preceding tokens, etc.). We
show that this dependency is much stronger than previously assumed. In fact, we
show that by completely masking the EAU text spans and only feeding information
from their context, a competitive system may function even better. We argue
that an argument analysis system that relies more on discourse context than the
argument's content is unsafe, since it can easily be tricked. To alleviate this
issue, we separate argumentative units from their context such that the system
is forced to model and rely on an EAU's content. We show that the resulting
classification system is more robust, and argue that such models are better
suited for predicting argumentative relations across documents.
|
[{'version': 'v1', 'created': 'Fri, 7 Jun 2019 21:36:49 GMT'}]
|
2019-06-11
|
[array(['Opitz', 'Juri', ''], dtype=object)
array(['Frank', 'Anette', ''], dtype=object)]
|
3,825 |
0707.2465
|
Enrico Piconcelli
|
E. Piconcelli, F. Fiore, F. Nicastro, S. Mathur, M. Brusa, A.
Comastri, S. Puccetti
|
The XMM-Newton view of IRAS 09104+4109: evidence for a changing-look
Type 2 quasar?
|
Accepted by Astronomy and Astrophysics
| null |
10.1051/0004-6361:20077630
| null |
astro-ph
| null |
We analyzed the spectroscopic data from the PN and the MOS cameras in the
0.4-10 keV band. We also used an archival BeppoSAX 1-50 keV observation of IRAS
09104+4109 to investigate possible variations of the quasar emission. The X-ray
emission in the EPIC band is dominated by the intra-cluster medium thermal
emission. We found that the quasar contributes ~35% of the total flux in the
2-10 keV band. Both a transmission- (through a Compton-thin absorber with a
Compton optical depth of \tau_C~0.3, i.e. Nh~5 x 10^{23} cm^-2) and a
reflection-dominated (\tau_C>1) model provide an excellent fit to the quasar
continuum emission. However, the value measured for the EW of Fe Kalpha
emission line is only marginally consistent with the presence of a
Compton-thick absorber in a reflection-dominated scenario, which had been
suggested by a previous, marginal (i.e. 2.5\sigma) detection with the hard
X-ray (15-50 keV), non-imaging BeppoSAX/PDS instrument. Moreover, the value of
luminosity in the 2-10 keV band measured by the transmission-dominated model is
fully consistent with that expected on the basis of the bolometric luminosity
of IRAS 09104+4109. From the analysis of the XMM-Newton data we therefore
suggest the possibility that the absorber along the line of sight to the
nucleus of IRAS 09104+4109 is Compton-thin. Alternatively, the absorber column
density could have changed from Compton-thick to -thin in the five years
elapsed between the observations. If this is the case, then IRAS 09104+4109 is
the first 'changing-look' quasar ever detected.
|
[{'version': 'v1', 'created': 'Tue, 17 Jul 2007 09:08:05 GMT'}]
|
2009-11-13
|
[array(['Piconcelli', 'E.', ''], dtype=object)
array(['Fiore', 'F.', ''], dtype=object)
array(['Nicastro', 'F.', ''], dtype=object)
array(['Mathur', 'S.', ''], dtype=object)
array(['Brusa', 'M.', ''], dtype=object)
array(['Comastri', 'A.', ''], dtype=object)
array(['Puccetti', 'S.', ''], dtype=object)]
|
3,826 |
1811.07832
|
Mark Podolskij
|
Mark Podolskij, Bezirgen Veliyev and Nakahiro Yoshida
|
Edgeworth expansion for Euler approximation of continuous diffusion
processes
| null | null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we present the Edgeworth expansion for the Euler approximation
scheme of a continuous diffusion process driven by a Brownian motion. Our
methodology is based upon a recent work \cite{Yoshida2013}, which establishes
Edgeworth expansions associated with asymptotic mixed normality using elements
of Malliavin calculus. Potential applications of our theoretical results
include higher order expansions for weak and strong approximation errors
associated to the Euler scheme, and for studentized version of the error
process.
|
[{'version': 'v1', 'created': 'Mon, 19 Nov 2018 17:44:34 GMT'}]
|
2018-11-20
|
[array(['Podolskij', 'Mark', ''], dtype=object)
array(['Veliyev', 'Bezirgen', ''], dtype=object)
array(['Yoshida', 'Nakahiro', ''], dtype=object)]
|
3,827 |
2011.05535
|
Parul Gupta
|
Karim Johannes Becher and Parul Gupta
|
Square-reflexive polynomials
| null | null | null | null |
math.AC math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For a field $E$ of characteristic different from $2$ and cohomological
$2$-dimension one, quadratic forms over the rational function field $E(X)$ are
studied. A characterisation in terms of polynomials in $E[X]$ is obtained for
having that quadratic forms over $E(X)$ satisfy a local-global principle with
respect to discrete valuations that are trivial on $E$. In this way new
elementary proofs for the local-global principle are achieved in the cases
where $E$ is finite or pseudo-algebraically closed. The study is complemented
by various examples.
|
[{'version': 'v1', 'created': 'Wed, 11 Nov 2020 03:54:57 GMT'}
{'version': 'v2', 'created': 'Thu, 8 Apr 2021 07:49:53 GMT'}
{'version': 'v3', 'created': 'Thu, 15 Jul 2021 10:48:19 GMT'}]
|
2021-07-16
|
[array(['Becher', 'Karim Johannes', ''], dtype=object)
array(['Gupta', 'Parul', ''], dtype=object)]
|
3,828 |
0707.0832
|
Raffaella Landi Dr
|
R. Landi, A. De Rosa, A.J. Dean, L. Bassani, P. Ubertini, A.J. Bird
|
HESS J1616-508: likely powered by PSR J1617-5055
|
7 pages, including 5 figures and 1 table. Accepted for publication in
MNRAS
| null |
10.1111/j.1365-2966.2007.12168.x
| null |
astro-ph
| null |
HESS J1616-508 is one of the brightest emitters in the TeV sky. Recent
observations with the IBIS/ISGRI telescope on board the INTEGRAL spacecraft
have revealed that a young, nearby and energetic pulsar, PSR J1617-5055, is a
powerful emitter of soft gamma-rays in the 20-100 keV domain. In this paper we
present an analysis of all available data from the INTEGRAL, Swift, BeppoSAX
and XMM-Newton telescopes with a view to assessing the most likely counterpart
to the HESS source. We find that the energy source that fuels the X/gamma-ray
emissions is derived from the pulsar, both on the basis of the positional
morphology, the timing evidence and the energetics of the system. Likewise, the
1.2% of the pulsar's spin down energy loss needed to power the 0.1-10 TeV
emission is also fully consistent with other HESS sources known to be
associated with pulsars. The relative sizes of the X/gamma-ray and VHE sources
are consistent with the expected lifetimes against synchrotron and Compton
losses for a single source of parent electrons emitted from the pulsar. We find
that no other known object in the vicinity could be reasonably considered as a
plausible counterpart to the HESS source. We conclude that there is good
evidence to assume that the HESS J1616-508 source is driven by PSR J1617-5055
in which a combination of synchrotron and inverse Compton processes combine to
create the observed morphology of a broad-band emitter from keV to TeV
energies.
|
[{'version': 'v1', 'created': 'Thu, 5 Jul 2007 16:53:23 GMT'}]
|
2009-11-13
|
[array(['Landi', 'R.', ''], dtype=object)
array(['De Rosa', 'A.', ''], dtype=object)
array(['Dean', 'A. J.', ''], dtype=object)
array(['Bassani', 'L.', ''], dtype=object)
array(['Ubertini', 'P.', ''], dtype=object)
array(['Bird', 'A. J.', ''], dtype=object)]
|
3,829 |
cond-mat/0201360
|
Shailesh Chandrasekharan
|
S. Chandrasekharan (Duke Univ.), J. Cox (MIT), J.C. Osborn (Duke Univ.
and U.of Utah) and U.-J. Wiese (MIT and Bern Univ.)
|
Meron-Cluster Approach to Systems of Strongly Correlated Electrons
|
36 Pages, 13 figures, plain Latex
|
Nucl.Phys. B673 (2003) 405-436
|
10.1016/j.nuclphysb.2003.08.041
| null |
cond-mat.str-el cond-mat.supr-con hep-lat nucl-th
| null |
Numerical simulations of strongly correlated electron systems suffer from the
notorious fermion sign problem which has prevented progress in understanding if
systems like the Hubbard model display high-temperature superconductivity. Here
we show how the fermion sign problem can be solved completely with
meron-cluster methods in a large class of models of strongly correlated
electron systems, some of which are in the extended Hubbard model family and
show s-wave superconductivity. In these models we also find that on-site
repulsion can even coexist with a weak chemical potential without introducing
sign problems. We argue that since these models can be simulated efficiently
using cluster algorithms they are ideal for studying many of the interesting
phenomena in strongly correlated electron systems.
|
[{'version': 'v1', 'created': 'Sun, 20 Jan 2002 19:49:55 GMT'}]
|
2015-06-24
|
[array(['Chandrasekharan', 'S.', '', 'Duke Univ.'], dtype=object)
array(['Cox', 'J.', '', 'MIT'], dtype=object)
array(['Osborn', 'J. C.', '', 'Duke Univ.\n and U.of Utah'], dtype=object)
array(['Wiese', 'U. -J.', '', 'MIT and Bern Univ.'], dtype=object)]
|
3,830 |
1606.00182
|
G\'eraud Le Falher
|
G\'eraud Le Falher, Nicol\`o Cesa-Bianchi, Claudio Gentile, Fabio
Vitale
|
On the Troll-Trust Model for Edge Sign Prediction in Social Networks
|
v5: accepted to AISTATS 2017
| null | null | null |
cs.LG cs.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the problem of edge sign prediction, we are given a directed graph
(representing a social network), and our task is to predict the binary labels
of the edges (i.e., the positive or negative nature of the social
relationships). Many successful heuristics for this problem are based on the
troll-trust features, estimating at each node the fraction of outgoing and
incoming positive/negative edges. We show that these heuristics can be
understood, and rigorously analyzed, as approximators to the Bayes optimal
classifier for a simple probabilistic model of the edge labels. We then show
that the maximum likelihood estimator for this model approximately corresponds
to the predictions of a Label Propagation algorithm run on a transformed
version of the original social graph. Extensive experiments on a number of
real-world datasets show that this algorithm is competitive against
state-of-the-art classifiers in terms of both accuracy and scalability.
Finally, we show that troll-trust features can also be used to derive online
learning algorithms which have theoretical guarantees even when edges are
adversarially labeled.
|
[{'version': 'v1', 'created': 'Wed, 1 Jun 2016 09:16:46 GMT'}
{'version': 'v2', 'created': 'Thu, 2 Jun 2016 13:39:36 GMT'}
{'version': 'v3', 'created': 'Fri, 17 Jun 2016 16:47:46 GMT'}
{'version': 'v4', 'created': 'Fri, 14 Oct 2016 09:39:59 GMT'}
{'version': 'v5', 'created': 'Tue, 28 Feb 2017 21:33:41 GMT'}]
|
2017-03-02
|
[array(['Falher', 'Géraud Le', ''], dtype=object)
array(['Cesa-Bianchi', 'Nicolò', ''], dtype=object)
array(['Gentile', 'Claudio', ''], dtype=object)
array(['Vitale', 'Fabio', ''], dtype=object)]
|
3,831 |
1306.2767
|
Melanie McLaren Ms.
|
Melanie McLaren, Jacquiline Romero, Miles J. Padgett, Filippus S. Roux
and Andrew Forbes
|
Two-photon optics of Bessel-Gaussian modes
|
8 pages, 10 figures
| null |
10.1103/PhysRevA.88.033818
| null |
quant-ph physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we consider geometrical two-photon optics of Bessel-Gaussian
modes generated in spontaneous parametric down-conversion of a Gaussian pump
beam. We provide a general theoretical expression for the orbital angular
momentum (OAM) spectrum and Schmidt number in this basis and show how this may
be varied by control over the radial degree of freedom, a continuous parameter
in Bessel-Gaussian modes. As a test we first implement a back-projection
technique to classically predict, by experiment, the quantum correlations for
Bessel-Gaussian modes produced by three holographic masks, a blazed axicon,
binary axicon and a binary Bessel function. We then proceed to test the theory
on the down-converted photons using the binary Bessel mask. We experimentally
quantify the number of usable OAM modes and confirm the theoretical prediction
of a flattening in the OAM spectrum and a concomitant increase in the OAM
bandwidth. The results have implications for the control of dimensionality in
quantum states.
|
[{'version': 'v1', 'created': 'Wed, 12 Jun 2013 09:42:08 GMT'}]
|
2016-11-26
|
[array(['McLaren', 'Melanie', ''], dtype=object)
array(['Romero', 'Jacquiline', ''], dtype=object)
array(['Padgett', 'Miles J.', ''], dtype=object)
array(['Roux', 'Filippus S.', ''], dtype=object)
array(['Forbes', 'Andrew', ''], dtype=object)]
|
3,832 |
2005.06811
|
Nick Jaensson
|
Kilian Dietrich, Nick Jaensson, Ivo Buttinoni, Giorgio Volpe, Lucio
Isa
|
Microscale Marangoni Surfers
|
main: 6 pages, 4 figures; supplemental: 18 pages, 11 figures
|
Phys. Rev. Lett. 125, 098001 (2020)
|
10.1103/PhysRevLett.125.098001
| null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We apply laser light to induce the asymmetric heating of Janus colloids
adsorbed at water-oil interfaces and realize active micrometric "Marangoni
surfers". The coupling of temperature and surfactant concentration gradients
generates Marangoni stresses leading to self-propulsion. Particle velocities
span four orders of magnitude, from microns/s to cm/s, depending on laser power
and surfactant concentration. Experiments are rationalized by finite elements
simulations, defining different propulsion regimes relative to the magnitude of
the thermal and solutal Marangoni stress components.
|
[{'version': 'v1', 'created': 'Thu, 14 May 2020 08:42:16 GMT'}]
|
2020-09-02
|
[array(['Dietrich', 'Kilian', ''], dtype=object)
array(['Jaensson', 'Nick', ''], dtype=object)
array(['Buttinoni', 'Ivo', ''], dtype=object)
array(['Volpe', 'Giorgio', ''], dtype=object)
array(['Isa', 'Lucio', ''], dtype=object)]
|
3,833 |
1210.4406
|
Johannes Mesa Pascasio
|
Gerhard Groessing, Siegfried Fussy, Johannes Mesa Pascasio, Herbert
Schwabl
|
A Classical Framework for Nonlocality and Entanglement
|
Invited talk presented by G. Groessing at QTRF-6 in Vaxjo, Sweden,
10-15 June 2012. 14 pages, 5 figures
|
AIP Conf. Proc. 1508 (2012), 187-196
|
10.1063/1.4773130
| null |
quant-ph physics.class-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Based on our model of quantum systems as emerging from the coupled dynamics
between oscillating "bouncers" and the space-filling zero-point field, a
sub-quantum account of nonlocal correlations is given. This is explicitly done
for the example of the "double two-slit" variant of two-particle
interferometry. However, it is also shown that the entanglement in two-particle
interferometry is only a natural consequence of the fact that already a
"single" two-slit experiment can be described on a sub-quantum level with the
aid of "entangling currents" of a generally nonlocal nature.
|
[{'version': 'v1', 'created': 'Tue, 16 Oct 2012 13:45:33 GMT'}]
|
2013-01-08
|
[array(['Groessing', 'Gerhard', ''], dtype=object)
array(['Fussy', 'Siegfried', ''], dtype=object)
array(['Pascasio', 'Johannes Mesa', ''], dtype=object)
array(['Schwabl', 'Herbert', ''], dtype=object)]
|
3,834 |
quant-ph/0702186
|
Ramazan Sever
|
Sameer M. Ikhdair and Ramazan Sever
|
Polynomial Solution of Non-Central Potentials
|
18 pages
|
Int. J. Theor. Phys. 46, 2384(2007)
|
10.1007/s10773-007-9356-8
| null |
quant-ph
| null |
We show that the exact energy eigenvalues and eigenfunctions of the
Schrodinger equation for charged particles moving in certain class of
non-central potentials can be easily calculated analytically in a simple and
elegant manner by using Nikiforov and Uvarov (NU) method. We discuss the
generalized Coulomb and harmonic oscillator systems. We study the Hartmann
Coulomb and the ring-shaped and compound Coulomb plus Aharanov-Bohm potentials
as special cases. The results are in exact agreement with other methods.
|
[{'version': 'v1', 'created': 'Mon, 19 Feb 2007 12:30:56 GMT'}]
|
2009-11-13
|
[array(['Ikhdair', 'Sameer M.', ''], dtype=object)
array(['Sever', 'Ramazan', ''], dtype=object)]
|
3,835 |
1806.06105
|
Moustapha Pemy
|
Moustapha Pemy
|
Explicit Solutions for Optimal Resource Extraction Problems under Regime
Switching L\'evy Models
| null | null | null | null |
econ.GN q-fin.EC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper studies the problem of optimally extracting nonrenewable natural
resources. Taking into account the fact that the market values of the main
natural resources i.e. oil, natural gas, copper,..., etc, fluctuate randomly
following global and seasonal macroeconomic parameters, the prices of natural
resources are modeled using Markov switching L\'evy processes. We formulate
this optimal extraction problem as an infinite-time horizon optimal control
problem. We derive closed-form solutions for the value function as well as the
optimal extraction policy. Numerical examples are presented to illustrate these
results.
|
[{'version': 'v1', 'created': 'Fri, 15 Jun 2018 19:53:36 GMT'}]
|
2018-07-23
|
[array(['Pemy', 'Moustapha', ''], dtype=object)]
|
3,836 |
cond-mat/0407425
|
Attila Szolnoki
|
Attila Szolnoki and Gyorgy Szabo
|
Phase transitions for rock-scissors-paper game on different networks
|
4 pages, 4 figures, to be published in PRE
|
Phys. Rev. E 70 (2004) 037102
|
10.1103/PhysRevE.70.037102
| null |
cond-mat.stat-mech
| null |
Monte Carlo simulations and dynamical mean-field approximations are performed
to study the phase transitions in rock-scissors-paper game on different host
networks. These graphs are originated from lattices by introducing quenched and
annealed randomness simultaneously. In the resulting phase diagrams three
different stationary states are identified for all structures. The comparison
of results on different networks suggests that the value of clustering
coefficient plays an irrelevant role in the emergence of a global oscillating
phase. The critical behavior of phase transitions seems to be universal and can
be described by the same exponents.
|
[{'version': 'v1', 'created': 'Fri, 16 Jul 2004 08:51:19 GMT'}]
|
2009-11-10
|
[array(['Szolnoki', 'Attila', ''], dtype=object)
array(['Szabo', 'Gyorgy', ''], dtype=object)]
|
3,837 |
2303.05732
|
Manzoor Hussain
|
Manzoor Hussain, Nazakat Ali, Jang-Eui Hong
|
Securing Safety in Collaborative Cyber-Physical Systems through Fault
Criticality Analysis
|
This paper is an extended version of an article submitted to
KCSE-2021
|
KIPS Transactions on Software and Data Engineering, vol. 10, no.
8, pp. 287-300, 2021
|
10.3745/KTSDE.2021.10.8.287
| null |
cs.SE cs.PF cs.SY eess.SY
|
http://creativecommons.org/licenses/by/4.0/
|
Collaborative Cyber-Physical Systems (CCPS) are systems that contain tightly
coupled physical and cyber components, massively interconnected subsystems, and
collaborate to achieve a common goal. The safety of a single Cyber-Physical
System (CPS) can be achieved by following the safety standards such as ISO
26262 and IEC 61508 or by applying hazard analysis techniques. However, due to
the complex, highly interconnected, heterogeneous, and collaborative nature of
CCPS, a fault in one CPS's components can trigger many other faults in other
collaborating CPSs. Therefore, a safety assurance technique based on fault
criticality analysis would require to ensure safety in CCPS. This paper
presents a Fault Criticality Matrix (FCM) implemented in our tool called
CPSTracer, which contains several data such as identified fault, fault
criticality, safety guard, etc. The proposed FCM is based on composite hazard
analysis and content-based relationships among the hazard analysis artifacts,
and ensures that the safety guard controls the identified faults at design
time; thus, we can effectively manage and control the fault at the design phase
to ensure the safe development of CPSs. To validate our approach, we introduce
a case study on the Platooning system (a collaborative CPS). We perform the
criticality analysis of the Platooning system using FCM in our developed tool.
After the detailed fault criticality analysis, we investigate the results to
check the appropriateness and effectiveness with two research questions. Also,
by performing simulation for the Platooning, we showed that the rate of
collision of the Platooning system without using FCM was quite high as compared
to the rate of collisions of the system after analyzing the fault criticality
using FCM.
|
[{'version': 'v1', 'created': 'Fri, 10 Mar 2023 06:33:37 GMT'}]
|
2023-03-13
|
[array(['Hussain', 'Manzoor', ''], dtype=object)
array(['Ali', 'Nazakat', ''], dtype=object)
array(['Hong', 'Jang-Eui', ''], dtype=object)]
|
3,838 |
2210.02309
|
Jan Friedrich
|
Jan Friedrich
|
Lyapunov stabilization of a nonlocal LWR traffic flow model
| null | null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using a nonlocal macroscopic LWR-type traffic flow model, we present an
approach to control the nonlocal velocity towards a given equilibrium velocity.
Therefore, we present a Lyapunov function measuring the $L^2$ distance between
these velocities. We compute the explicit rate at which the system tends
towards the stationary speed. The traffic is controlled by a leading vehicle.
Numerical examples demonstrate the theoretical results and possible extensions
of them.
|
[{'version': 'v1', 'created': 'Wed, 5 Oct 2022 14:52:30 GMT'}]
|
2022-10-06
|
[array(['Friedrich', 'Jan', ''], dtype=object)]
|
3,839 |
0912.3940
|
Jakub \v{R}\'ipa
|
J. Ripa, A. Meszaros, R. Hudec, C. Wigger, W. Hajdas
|
The RHESSI Satellite and Classes of Gamma-ray Bursts
|
Published in Gamma-Ray Bursts 2007: Proceedings of the Santa Fe
Conference
|
AIP Conf.Proc.1000:56-59,2008
|
10.1063/1.2943534
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Some articles based on the BATSE gamma-ray burst (GRB) catalog claim the
existence of a third population of GRBs, besides long and short. In this
contribution we wanted to verify these claims with an independent data source,
namely the RHESSI GRB catalog. Our verification is based on the statistical
analysis of duration and hardness ratio of GRBs. The result is that there is no
significant third group of GRBs in our RHESSI GRB data-set.
|
[{'version': 'v1', 'created': 'Sat, 19 Dec 2009 21:56:27 GMT'}]
|
2011-08-31
|
[array(['Ripa', 'J.', ''], dtype=object)
array(['Meszaros', 'A.', ''], dtype=object)
array(['Hudec', 'R.', ''], dtype=object)
array(['Wigger', 'C.', ''], dtype=object)
array(['Hajdas', 'W.', ''], dtype=object)]
|
3,840 |
1607.01990
|
Nuria Bel
|
N\'uria Bel, Mikel L. Forcada and Asunci\'on G\'omez-P\'erez
|
A Maturity Model for Public Administration as Open Translation Data
Providers
| null | null | null | null |
cs.CY cs.CL
|
http://creativecommons.org/licenses/by/4.0/
|
Any public administration that produces translation data can be a provider of
useful reusable data to meet its own translation needs and the ones of other
public organizations and private companies that work with texts of the same
domain. These data can also be crucial to produce domain-tuned Machine
Translation systems. The organization's management of the translation process,
the characteristics of the archives of the generated resources and of the
infrastructure available to support them determine the efficiency and the
effectiveness with which the materials produced can be converted into reusable
data. However, it is of utmost importance that the organizations themselves
first become aware of the goods they are producing and, second, adapt their
internal processes to become optimal providers. In this article, we propose a
Maturity Model to help these organizations to achieve it by identifying the
different stages of the management of translation data that determine the path
to the aforementioned goal.
|
[{'version': 'v1', 'created': 'Thu, 7 Jul 2016 12:35:31 GMT'}]
|
2016-07-08
|
[array(['Bel', 'Núria', ''], dtype=object)
array(['Forcada', 'Mikel L.', ''], dtype=object)
array(['Gómez-Pérez', 'Asunción', ''], dtype=object)]
|
3,841 |
2101.09369
|
Gil de Oliveira-Neto
|
G. Oliveira-Neto and L. Fazza Marcon
|
Complete noncommutativity in a cosmological model with radiation
|
The paper has 35 pages and 14 figures
|
Eur. Phys. J. Plus 136, 584 (2021)
|
10.1140/epjp/s13360-021-01587-6
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In order to try explaining the present accelerated expansion of the universe,
we consider the most complete noncommutativity, of a certain type, in a
Friedmann-Robertson-Walker cosmological model, coupled to a perfect fluid. We
use the ADM formalism in order to write the gravitational Hamiltonian of the
model and the Schutz's formalism in order to write the perfect fluid
Hamiltonian. The noncommutativity is introduced by four nontrivial Poisson
brackets between all geometrical as well as matter variables of the model. Each
nontrivial Poisson bracket is associated to a noncommutative parameter. We
recover the description in terms of commutative variables by introducing four
variables transformations that depend on the noncommutative parameters. Using
those variables transformations, we rewrite the total noncommutative
Hamiltonian of the model in terms of commutative variables. From the resulting
Hamiltonian, we obtain the scale factor dynamical equations for a generic
perfect fluid. In order to solve these equations, we restrict our attention to
a model where the perfect fluid is radiation. The solutions depend on six
parameters: the four noncommutative parameters, a parameter associated with the
fluid energy $C$, and the curvature parameter $k$. They also depend on the
initial conditions of the model variables. We compare the noncommutative
solutions to the corresponding commutative ones and determine how the former
ones differ from the latter ones. The comparison shows that the noncommutative
model is very useful for describing the accelerated expansion of the universe.
We also obtain estimates for one of the noncommutative parameters.
|
[{'version': 'v1', 'created': 'Fri, 22 Jan 2021 22:39:04 GMT'}]
|
2021-06-23
|
[array(['Oliveira-Neto', 'G.', ''], dtype=object)
array(['Marcon', 'L. Fazza', ''], dtype=object)]
|
3,842 |
1310.1573
|
Charlotte Werndl
|
Charlotte Werndl
|
Justifying Typicality Measures of Boltzmannian Statistical Mechanics and
Dynamical Systems
| null | null | null | null |
physics.hist-ph nlin.CD physics.class-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A popular view in contemporary Boltzmannian statistical mechanics is to
interpret the measures as typicality measures. In measure-theoretic dynamical
systems theory measures can similarly be interpreted as typicality measures.
However, a justification why these measures are a good choice of typicality
measures is missing, and the paper attempts to fill this gap. The paper first
argues that Pitowsky's (2012) justification of typicality measures does not fit
the bill. Then a first proposal of how to justify typicality measures is
presented. The main premises are that typicality measures are invariant and are
related to the initial probability distribution of interest (which are
translation-continuous or translation-close). The conclusion are two theorems
which show that the standard measures of statistical mechanics and dynamical
systems are typicality measures. There may be other typicality measures, but
they agree about judgements of typicality. Finally, it is proven that if
systems are ergodic or epsilon-ergodic, there are uniqueness results about
typicality measures.
|
[{'version': 'v1', 'created': 'Sun, 6 Oct 2013 11:16:50 GMT'}]
|
2013-10-08
|
[array(['Werndl', 'Charlotte', ''], dtype=object)]
|
3,843 |
1910.06800
|
Christopher Aubin
|
Christopher Aubin, Gunnar Bali, Luigi Del Debbio, William Detmold,
Vera G\"ulpers, Sophie Hollitt, Huey-Wen Lin, Liuming Liu, Sin\'ead M. Ryan
|
Report on the 2019 Lattice Diversity and Inclusivity Survey
|
12 pages, 13 figures, 1 table. To appear in the Proceedings of 37th
International Symposium on Lattice Field Theory - Lattice2019, 16-22 June
2019, Wuhan, China
|
PoS(LATTICE2019)295
| null | null |
hep-lat
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report on the results of a survey to assess diversity and inclusivity in
the Lattice community as one of the duties of a newly formed Committee on
Diversity and Inclusivity in the Lattice community.
|
[{'version': 'v1', 'created': 'Mon, 14 Oct 2019 17:22:46 GMT'}]
|
2019-10-16
|
[array(['Aubin', 'Christopher', ''], dtype=object)
array(['Bali', 'Gunnar', ''], dtype=object)
array(['Del Debbio', 'Luigi', ''], dtype=object)
array(['Detmold', 'William', ''], dtype=object)
array(['Gülpers', 'Vera', ''], dtype=object)
array(['Hollitt', 'Sophie', ''], dtype=object)
array(['Lin', 'Huey-Wen', ''], dtype=object)
array(['Liu', 'Liuming', ''], dtype=object)
array(['Ryan', 'Sinéad M.', ''], dtype=object)]
|
3,844 |
2304.01194
|
Akshay Dudhane
|
Akshay Dudhane, Syed Waqas Zamir, Salman Khan, Fahad Shahbaz Khan,
Ming-Hsuan Yang
|
Burstormer: Burst Image Restoration and Enhancement Transformer
|
Accepted at CVPR 2023
| null | null | null |
cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
On a shutter press, modern handheld cameras capture multiple images in rapid
succession and merge them to generate a single image. However, individual
frames in a burst are misaligned due to inevitable motions and contain multiple
degradations. The challenge is to properly align the successive image shots and
merge their complimentary information to achieve high-quality outputs. Towards
this direction, we propose Burstormer: a novel transformer-based architecture
for burst image restoration and enhancement. In comparison to existing works,
our approach exploits multi-scale local and non-local features to achieve
improved alignment and feature fusion. Our key idea is to enable inter-frame
communication in the burst neighborhoods for information aggregation and
progressive fusion while modeling the burst-wide context. However, the input
burst frames need to be properly aligned before fusing their information.
Therefore, we propose an enhanced deformable alignment module for aligning
burst features with regards to the reference frame. Unlike existing methods,
the proposed alignment module not only aligns burst features but also exchanges
feature information and maintains focused communication with the reference
frame through the proposed reference-based feature enrichment mechanism, which
facilitates handling complex motions. After multi-level alignment and
enrichment, we re-emphasize on inter-frame communication within burst using a
cyclic burst sampling module. Finally, the inter-frame information is
aggregated using the proposed burst feature fusion module followed by
progressive upsampling. Our Burstormer outperforms state-of-the-art methods on
burst super-resolution, burst denoising and burst low-light enhancement. Our
codes and pretrained models are available at https://
github.com/akshaydudhane16/Burstormer
|
[{'version': 'v1', 'created': 'Mon, 3 Apr 2023 17:58:44 GMT'}]
|
2023-04-04
|
[array(['Dudhane', 'Akshay', ''], dtype=object)
array(['Zamir', 'Syed Waqas', ''], dtype=object)
array(['Khan', 'Salman', ''], dtype=object)
array(['Khan', 'Fahad Shahbaz', ''], dtype=object)
array(['Yang', 'Ming-Hsuan', ''], dtype=object)]
|
3,845 |
2305.14140
|
Diego Portillo-S\'anchez
|
Juan Manuel M\'arquez, Diego Portillo-S\'anchez and Pablo Roig
|
On the Dirac-Majorana neutrinos distinction in four-body decays
|
20 pages, 6 figures. Added detailed discussions and rewritten in
order to focus more on the specific details of our work
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A novel method to differentiate the effects of Dirac and Majorana (D-M)
neutrinos in four-body decays has been discussed in arXiv:2106.11785. It is
concluded in that Ref. that the back-to-back kinematic scenario seems to avoid
the constraint imposed by the 'practical Dirac-Majorana confusion theorem' as
one does not need to fully integrate over neutrino and antineutrino momenta. In
this paper we propose to analyse radiative leptonic lepton-decays
($\ell\to\ell'\nu\bar{\nu}\gamma$), as an independent alternative process to
study the possible Majorana nature of neutrinos. Our approach demonstrates
that, in the back-to-back kinematic configuration (for the $\ell'- \gamma$ and
$\nu-\bar{\nu}$ systems, respectively), the distinction between Dirac and
Majorana cases disappears when the inaccessible neutrino angle is integrated
out. This outcome might appear unexpected considering the motivation outlined
in arXiv:2106.11785. We trace back this D-M suppression to the kinematics of
four-body decays. To elucidate these aspects within our approach, we employ
consistency tests. All this applies in absence of non-standard interactions,
which can enhance generally the sensitivity to the neutrino nature.
|
[{'version': 'v1', 'created': 'Tue, 23 May 2023 15:05:29 GMT'}
{'version': 'v2', 'created': 'Tue, 27 Jun 2023 16:32:07 GMT'}]
|
2023-06-28
|
[array(['Márquez', 'Juan Manuel', ''], dtype=object)
array(['Portillo-Sánchez', 'Diego', ''], dtype=object)
array(['Roig', 'Pablo', ''], dtype=object)]
|
3,846 |
hep-th/9407173
|
Piljin Yi
|
Piljin Yi
|
Toward One-Loop Tunneling Rates of Near-Extremal Magnetic Black Hole
Pair-Production
|
LaTeX, 27pp, one uuencoded figure (A few sentences are rephrased to
prevent a possible confusion; an extra paragraph Commenting on the strictly
extremal case is added.)
|
Phys.Rev. D51 (1995) 2813-2826
|
10.1103/PhysRevD.51.2813
|
CALT-68-1936, SNUTP-94-67
|
hep-th gr-qc
| null |
Pair-production of magnetic Reissner-Nordstr\"{o}m black holes (of charges
$\pm q$) was recently studied in the leading WKB approximation. Here, we
consider generic quantum fluctuations in the corresponding instanton geometry
given by the Euclidean Ernst metric, in order to simulate the behaviour of the
one-loop tunneling rate. A detailed study of the Ernst metric suggests that for
sufficiently weak field $B$, the problem can be reduced to that of quantum
fluctuations around a single near-extremal Euclidean black hole in thermal
equilibrium with a heat bath of finite size. After appropriate renormalization
procedures, typical one-loop contributions to the WKB exponent are shown to be
inversely proportional to $B$, as $B\rightarrow 0$, indicating that the leading
Schwinger term is corrected by a small fraction $\sim \hbar /q^2$. We
demonstrate that this correction to the Schwinger term is actually due to a
semiclassical shift of the black hole mass-to-charge ratio that persists even
in the extremal limit. Finally we discuss a few loose ends.
|
[{'version': 'v1', 'created': 'Tue, 26 Jul 1994 19:31:12 GMT'}
{'version': 'v2', 'created': 'Wed, 16 Nov 1994 15:09:38 GMT'}]
|
2009-10-28
|
[array(['Yi', 'Piljin', ''], dtype=object)]
|
3,847 |
1203.4750
|
Homer G. Ellis
|
Homer G. Ellis
|
Gravity Inside a Nonrotating, Homogeneous, Spherical Body
|
6 pages, 1 figure, 5 references, REVTex 4.1; v2: final paragraph
changed to delete error, 3 references added
| null | null | null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Schwarzschild's 'interior solution' is a space-time metric that satisfies
Einstein's gravitational field equations with a source term that Einstein
created on the basis of an unjustified identification of the conceptually
distinct notions of the passive gravitational mass of matter and the active
gravitational mass of matter. Giving up that assumption allows deriving from a
variational principle new and better (because logically obtained) field
equations that more faithfully extend the Poisson equation for Newton's gravity
than do Einstein's, with an active gravitational mass density providing the
source term. Solving these equations for a nonrotating spherical ball of matter
with uniform mass density produces a new, improved interior metric matched at
the surface of the ball to Schwarzschild's 'exterior' solution metric. This new
metric can then be used to address questions about the flight times of photons
and neutrinos through such a ball of matter.
|
[{'version': 'v1', 'created': 'Tue, 20 Mar 2012 19:27:04 GMT'}
{'version': 'v2', 'created': 'Tue, 16 Oct 2012 20:00:48 GMT'}]
|
2012-10-18
|
[array(['Ellis', 'Homer G.', ''], dtype=object)]
|
3,848 |
2203.08089
|
Chris Williams
|
Christopher K. I. Williams
|
On Suspicious Coincidences and Pointwise Mutual Information
|
9 pages, 1 figure. Addendum added March 2023
|
Neural Computation 34(10) 2037-2046 (2022)
|
10.1162/neco_a_01533
| null |
cs.LG cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Barlow (1985) hypothesized that the co-occurrence of two events $A$ and $B$
is "suspicious" if $P(A,B) \gg P(A) P(B)$. We first review classical measures
of association for $2 \times 2$ contingency tables, including Yule's $Y$ (Yule,
1912), which depends only on the odds ratio $\lambda$, and is independent of
the marginal probabilities of the table. We then discuss the mutual information
(MI) and pointwise mutual information (PMI), which depend on the ratio
$P(A,B)/P(A)P(B)$, as measures of association. We show that, once the effect of
the marginals is removed, MI and PMI behave similarly to $Y$ as functions of
$\lambda$. The pointwise mutual information is used extensively in some
research communities for flagging suspicious coincidences, but it is important
to bear in mind the sensitivity of the PMI to the marginals, with increased
scores for sparser events.
|
[{'version': 'v1', 'created': 'Tue, 15 Mar 2022 17:18:48 GMT'}
{'version': 'v2', 'created': 'Mon, 13 Jun 2022 14:36:10 GMT'}
{'version': 'v3', 'created': 'Thu, 2 Mar 2023 15:53:20 GMT'}]
|
2023-03-03
|
[array(['Williams', 'Christopher K. I.', ''], dtype=object)]
|
3,849 |
1306.1466
|
Gabriella B\"ohm
|
Gabriella B\"ohm, Jos\'e G\'omez-Torrecillas, Esperanza
L\'opez-Centella
|
Weak multiplier bialgebras
|
LaTeX source, 39 pages
| null | null | null |
math.QA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A non-unital generalization of weak bialgebra is proposed with a
multiplier-valued comultiplication. Certain canonical subalgebras of the
multiplier algebra (named the `base algebras') are shown to carry coseparable
co-Frobenius coalgebra structures. Appropriate modules over a weak multiplier
bialgebra are shown to constitute a monoidal category via the (co)module tensor
product over the base algebra. The relation to Van Daele and Wang's (regular
and arbitrary) weak multiplier Hopf algebra is discussed.
|
[{'version': 'v1', 'created': 'Thu, 6 Jun 2013 16:35:18 GMT'}
{'version': 'v2', 'created': 'Sat, 26 Oct 2013 12:59:09 GMT'}]
|
2013-10-29
|
[array(['Böhm', 'Gabriella', ''], dtype=object)
array(['Gómez-Torrecillas', 'José', ''], dtype=object)
array(['López-Centella', 'Esperanza', ''], dtype=object)]
|
3,850 |
1303.5455
|
Mathias Dietzel
|
Mathias Dietzel and Steffen Hardt
|
Flow and streaming potential of an electrolyte in a channel with an
axial temperature gradient
|
48 pages, 7 figures
| null | null | null |
physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The effect of an axial temperature gradient on the flow profile and the
induced streaming potential of a pressure-driven symmetric electrolyte in a
slit channel is investigated. Based on the non-isothermal Nernst-Planck
equations as well as the Poisson equation in the lubrication approximation,
expressions for the ion distribution in the electric double layer (EDL) are
derived. It is found that thermophoretic ion motion and a temperature-dependent
electrophoretic ion mobility increase the local EDL thickness with temperature,
whereas a temperature-dependent permittivity shrinks the EDL. Within the
Debye-H\"uckel approximation, the Navier-Stokes equation with the corresponding
electric body force terms is solved. Analytical expressions for the flow
profile and the induced (streaming) field under non-isothermal conditions are
derived. It is shown that for such a situation the induced electric field is
the linear superposition of at least seven individual contributions. For very
wide channels, only the thermoelectric field typically present in bulk
electrolytes when subjected to a temperature gradient (Soret equilibrium) as
well as the conventional pressure-induced streaming field are of importance.
Under extreme confinement, selective thermo-electro-migration driven by the
interplay between the temperature-dependent electrophoretic ion mobility and
the interaction of the ions with the surface wall charge causes a
thermoelectric field of non-advective origin. For wider channels and besides
the well-known thermoosmosis due to the temperature dependence of the
dielectric permittivity, it is demonstrated that a temperature gradient renders
the ion cloud in the EDL out of mechanical equilibrium. This leads to a
thermoosmotic flow, and the ion advection affiliated with it may induce a
thermoelectric field of similar order of magnitude as the one caused by more
conventional thermal effects.
|
[{'version': 'v1', 'created': 'Thu, 21 Mar 2013 20:30:42 GMT'}
{'version': 'v2', 'created': 'Wed, 24 Jun 2020 23:14:17 GMT'}]
|
2020-06-26
|
[array(['Dietzel', 'Mathias', ''], dtype=object)
array(['Hardt', 'Steffen', ''], dtype=object)]
|
3,851 |
1305.3847
|
Konstantin G. Savvidy
|
Yun Zhang and Konstantin Savvidy
|
Proton Compton scattering in a unified proton-Delta Model
|
22 pages, 36 figures, pdflatex
|
Phys. Rev. C 88, 064614 (2013)
|
10.1103/PhysRevC.88.064614
|
NITS-PHY-2013002
|
hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We develop a field-theoretic model for the description of proton Compton
scattering in which the proton and its excited state, the \Delta+ resonance,
are described as part of one multiplet with a single Rarita-Schwinger
wavefunction. In order to describe the phenomena observed, it is necessary to
incorporate both minimal and non-minimal couplings. The minimal coupling
reflects the fact that the \Delta+ is a charged particle, and in this model the
minimal coupling contributes also to the M1 magnetic transition via the \gamma
N\Delta vertex. The non-minimal couplings consist of five electromagnetic
form-factors, which are accessed at fixed and vanishing momentum-transfer
squared with real photons in Compton scattering experiments, therefore it is
possible to extract a rather well-determined set of optimal parameters which
reasonably well fit the data in the resonance region 140-450 MeV. The crucial
parameter which determines the \gamma N\Delta transition amplitude and
therefore the height of the resonance peak is equal to 3.66 +- 0.03, in units
of \mu_N. We find that this parameter also primarily determines the
contributions to magnetic polarizability in this model. In the low-energy
region up to 140 MeV, we separately fit the electric and magnetic
polarizabilities, while keeping the other parameters fixed and obtain values in
line with previous approaches. The basic model is then extended by
incorporating the sigma-meson channel with the currently favored parameters,
and the pion vertex corrections.
|
[{'version': 'v1', 'created': 'Thu, 16 May 2013 15:53:04 GMT'}]
|
2014-01-01
|
[array(['Zhang', 'Yun', ''], dtype=object)
array(['Savvidy', 'Konstantin', ''], dtype=object)]
|
3,852 |
math/0501559
|
Waldyr A. Rodrigues Jr.
|
A. M. Moya, V. V. Fernandez and W. A. Rodrigues Jr
|
Multivector and Extensor Fields on Smooth Manifolds
|
revised version
|
Int. J. Geom. Meth. Mod. Phys. 4 (6), 965-985 (2007)
| null | null |
math.DG
| null |
The objective of the present paper (the second in a series of four) is to
give a theory of multivector and extensor fields on a smooth manifold M of
arbitrary topology based on the powerful geometric algebra of multivectors and
extensors. Our approach does not suffer the problems of earlier attempts which
are restricted to vector manifolds. It is based on the existence of canonical
algebraic structures over the so-called canonical space associated to a local
chart (U_{o},phi_{o}) of the maximal atlas of M. The key concepts of
a-directional ordinary derivatives of multivector and extensor fields are
defined and their properties studied. Also, we introduce the Lie algebra of
smooth vector fields and the Hestenes derivatives whose properties are studied
in details.
|
[{'version': 'v1', 'created': 'Mon, 31 Jan 2005 20:35:29 GMT'}
{'version': 'v2', 'created': 'Tue, 1 Feb 2005 09:32:47 GMT'}
{'version': 'v3', 'created': 'Wed, 30 Aug 2006 19:52:13 GMT'}
{'version': 'v4', 'created': 'Sat, 3 Mar 2007 13:16:13 GMT'}
{'version': 'v5', 'created': 'Thu, 29 Nov 2007 14:54:57 GMT'}]
|
2007-11-29
|
[array(['Moya', 'A. M.', ''], dtype=object)
array(['Fernandez', 'V. V.', ''], dtype=object)
array(['Rodrigues', 'W. A.', 'Jr'], dtype=object)]
|
3,853 |
1206.5714
|
Vladimir Mantsevich
|
P. I. Arseyev, N. S. Maslova, V. N. Mantsevich
|
Charge and spin configurations in the coupled quantum dots with Coulomb
correlations induced by tunneling current
|
10 pages, 6 figures
|
European Physical Journal B, 85(12): 410 (2012)
|
10.1140/epjb/e2012-30579-x
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigated the peculiarities of non-equilibrium charge states and spin
configurations in the system of two strongly coupled quantum dots (QDs) weakly
connected to the electrodes in the presence of Coulomb correlations. We
analyzed the modification of non-equilibrium charge states and different spin
configurations of the system in a wide range of applied bias voltage and
revealed well pronounced ranges of system parameters where negative tunneling
conductivity appears due to the Coulomb correlations.
|
[{'version': 'v1', 'created': 'Mon, 25 Jun 2012 15:44:26 GMT'}]
|
2012-12-19
|
[array(['Arseyev', 'P. I.', ''], dtype=object)
array(['Maslova', 'N. S.', ''], dtype=object)
array(['Mantsevich', 'V. N.', ''], dtype=object)]
|
3,854 |
1602.06342
|
Guergana Petrova
|
Ronald DeVore, Guergana Petrova, and Przemyslaw Wojtaszczyk
|
Data Assimilation and Sampling in Banach spaces
| null | null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper studies the problem of approximating a function $f$ in a Banach
space $X$ from measurements $l_j(f)$, $j=1,\dots,m$, where the $l_j$ are linear
functionals from $X^*$. Most results study this problem for classical Banach
spaces $X$ such as the $L_p$ spaces, $1\le p\le \infty$, and for $K$ the unit
ball of a smoothness space in $X$. Our interest in this paper is in the model
classes $K=K(\epsilon,V)$, with $\epsilon>0$ and $V$ a finite dimensional
subspace of $X$, which consists of all $f\in X$ such that $dist(f,V)_X\le
\epsilon$. These model classes, called {\it approximation sets}, arise
naturally in application domains such as parametric partial differential
equations, uncertainty quantification, and signal processing.
A general theory for the recovery of approximation sets in a Banach space is
given. This theory includes tight a priori bounds on optimal performance, and
algorithms for finding near optimal approximations. We show how the recovery
problem for approximation sets is connected with well-studied concepts in
Banach space theory such as liftings and the angle between spaces. Examples are
given that show how this theory can be used to recover several recent results
on sampling and data assimilation.
|
[{'version': 'v1', 'created': 'Fri, 19 Feb 2016 22:59:27 GMT'}
{'version': 'v2', 'created': 'Wed, 3 Aug 2016 15:30:57 GMT'}
{'version': 'v3', 'created': 'Fri, 5 Aug 2016 09:52:07 GMT'}]
|
2016-08-08
|
[array(['DeVore', 'Ronald', ''], dtype=object)
array(['Petrova', 'Guergana', ''], dtype=object)
array(['Wojtaszczyk', 'Przemyslaw', ''], dtype=object)]
|
3,855 |
1309.4293
|
Tilmann Piffl
|
T. Piffl, C. Scannapieco, J. Binney, M. Steinmetz, R.-D. Scholz, M. E.
K. Williams, R. S. de Jong, G. Kordopatis, G. Matijevic, O. Bienayme, J.
Bland-Hawthorn, C. Boeche, K. Freeman, B. Gibson, G. Gilmore, E. K. Grebel,
A. Helmi, U. Munari, J. F. Navarro, Q. Parker, W. A. Reid, G. Seabroke, F.
Watson, R. F. G. Wyse, T. Zwitter
|
The RAVE survey: the Galactic escape speed and the mass of the Milky Way
|
16 pages, 15 figures; accepted for publication in Astronomy &
Astrophysics
| null |
10.1051/0004-6361/201322531
| null |
astro-ph.GA astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We construct new estimates on the Galactic escape speed at various
Galactocentric radii using the latest data release of the Radial Velocity
Experiment (RAVE DR4). Compared to previous studies we have a database larger
by a factor of 10 as well as reliable distance estimates for almost all stars.
Our analysis is based on the statistical analysis of a rigorously selected
sample of 90 high-velocity halo stars from RAVE and a previously published data
set. We calibrate and extensively test our method using a suite of cosmological
simulations of the formation of Milky Way-sized galaxies. Our best estimate of
the local Galactic escape speed, which we define as the minimum speed required
to reach three virial radii $R_{340}$, is $533^{+54}_{-41}$ km/s (90%
confidence) with an additional 5% systematic uncertainty, where $R_{340}$ is
the Galactocentric radius encompassing a mean over-density of 340 times the
critical density for closure in the Universe. From the escape speed we further
derive estimates of the mass of the Galaxy using a simple mass model with two
options for the mass profile of the dark matter halo: an unaltered and an
adiabatically contracted Navarro, Frenk & White (NFW) sphere. If we fix the
local circular velocity the latter profile yields a significantly higher mass
than the un-contracted halo, but if we instead use the statistics on halo
concentration parameters in large cosmological simulations as a constraint we
find very similar masses for both models. Our best estimate for $M_{340}$, the
mass interior to $R_{340}$ (dark matter and baryons), is $1.3^{+0.4}_{-0.3}
\times 10^{12}$ M$_\odot$ (corresponding to $M_{200} = 1.6^{+0.5}_{-0.4} \times
10^{12}$ M$_\odot$). This estimate is in good agreement with recently published
independent mass estimates based on the kinematics of more distant halo stars
and the satellite galaxy Leo I.
|
[{'version': 'v1', 'created': 'Tue, 17 Sep 2013 13:02:54 GMT'}
{'version': 'v2', 'created': 'Thu, 7 Nov 2013 10:53:04 GMT'}
{'version': 'v3', 'created': 'Wed, 13 Nov 2013 12:03:36 GMT'}]
|
2014-02-18
|
[array(['Piffl', 'T.', ''], dtype=object)
array(['Scannapieco', 'C.', ''], dtype=object)
array(['Binney', 'J.', ''], dtype=object)
array(['Steinmetz', 'M.', ''], dtype=object)
array(['Scholz', 'R. -D.', ''], dtype=object)
array(['Williams', 'M. E. K.', ''], dtype=object)
array(['de Jong', 'R. S.', ''], dtype=object)
array(['Kordopatis', 'G.', ''], dtype=object)
array(['Matijevic', 'G.', ''], dtype=object)
array(['Bienayme', 'O.', ''], dtype=object)
array(['Bland-Hawthorn', 'J.', ''], dtype=object)
array(['Boeche', 'C.', ''], dtype=object)
array(['Freeman', 'K.', ''], dtype=object)
array(['Gibson', 'B.', ''], dtype=object)
array(['Gilmore', 'G.', ''], dtype=object)
array(['Grebel', 'E. K.', ''], dtype=object)
array(['Helmi', 'A.', ''], dtype=object)
array(['Munari', 'U.', ''], dtype=object)
array(['Navarro', 'J. F.', ''], dtype=object)
array(['Parker', 'Q.', ''], dtype=object)
array(['Reid', 'W. A.', ''], dtype=object)
array(['Seabroke', 'G.', ''], dtype=object)
array(['Watson', 'F.', ''], dtype=object)
array(['Wyse', 'R. F. G.', ''], dtype=object)
array(['Zwitter', 'T.', ''], dtype=object)]
|
3,856 |
1806.10874
|
Nir Fulman
|
Nir Fulman, Itzhak Benenson
|
Approximation of Search Times for On-street Parking Based on Supply and
Demand
| null | null | null | null |
physics.soc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a method for approximating the probability p({\tau}, n) of
searching for on-street parking longer than time {\tau} from the start of a
parking search near a given destination n, based on high-resolution maps of
parking demand and supply in a city. We verify the method by comparing its
outcomes to the estimates obtained with an agent-based model of on-street
parking search. As a practical example, we construct maps of cruising time for
the Israeli city of Bat Yam, and demonstrate that despite the low overall
demand-to-supply ratio of 0.65, excessive demand in the city center results in
parking searches of longer than 10 minutes. We discuss the application of the
proposed approach for urban planning.
|
[{'version': 'v1', 'created': 'Thu, 28 Jun 2018 10:47:55 GMT'}
{'version': 'v2', 'created': 'Wed, 12 Jun 2019 16:44:08 GMT'}]
|
2019-06-13
|
[array(['Fulman', 'Nir', ''], dtype=object)
array(['Benenson', 'Itzhak', ''], dtype=object)]
|
3,857 |
2205.13413
|
Akbar Safarov Doctor
|
Akbar R.Safarov
|
Estimates for Mittag-Leffler functions with smooth phase depending on
two variables
| null | null | null | null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we consider the problem on estimates for Mittag-Leffler
functions with the smooth phase functions of two variables having singularities
of type $D_{\infty} $, $D_{4}^{\pm}$ and $A_{r}$. The generalisation is that we
replace the exponential function with the Mittag-Leffler-type function, to
study oscillatory type integrals. We extend results of paper \cite{Ruzhansky}
and \cite{Ruzhansky2021} to two-dimensional integrals with phase having some
simple singularities.
|
[{'version': 'v1', 'created': 'Mon, 23 May 2022 12:18:17 GMT'}]
|
2022-05-27
|
[array(['Safarov', 'Akbar R.', ''], dtype=object)]
|
3,858 |
1710.05660
|
Frank Emmert-Streib
|
Matthias Dehmer, Frank Emmert-Streib, and Yongtang Shi
|
Quantitative Graph Theory: A new branch of graph theory and in network
science
| null |
Information Sciences 2017
| null | null |
cs.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we describe {\sc quantitative graph theory} and argue it is a
new graph-theoretical branch in network science, however, with significant
different features compared to classical graph theory. The main goal of
quantitative graph theory is the structural quantification of information
contained in complex networks by employing a {\it measurement approach} based
on numerical invariants and comparisons. Furthermore, the methods as well as
the networks do not need to be deterministic but can be statistic. As such this
complements the field of classical graph theory, which is descriptive and
deterministic in nature. We provide examples of how quantitative graph theory
can be used for novel applications in the context of the overarching concept
network science.
|
[{'version': 'v1', 'created': 'Thu, 12 Oct 2017 12:19:01 GMT'}]
|
2017-10-17
|
[array(['Dehmer', 'Matthias', ''], dtype=object)
array(['Emmert-Streib', 'Frank', ''], dtype=object)
array(['Shi', 'Yongtang', ''], dtype=object)]
|
3,859 |
2006.12775
|
Sonachalam Arumugam
|
L. Govindaraj, S. Arumugam, R. Thiyagarajan, Dinesh Kumar, M. Kannan,
Dhrubha Das, T. S. Suraj, V. Sankaranarayanan, K. Sethupathi, G. Baskaran,
Raman Sankar, M. S. Ramachandra Rao
|
Wohlleben Effect and Emergent Pi junctions in superconducting Boron
doped Diamond thin films
|
21 Pages, 7 Figures
| null | null | null |
cond-mat.supr-con
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Diamond is an excellent band insulator. However, boron (B) doping is known to
induce superconductivity. We present two interesting effects in superconducting
B doped diamond (BDD) thin films: i) Wohlleben effect (paramagnetic Meissner
effect, PME) and ii) a low field spin glass like susceptibility anomaly. We
have performed electrical and magnetic measurements (under pressure in one
sample) at dopings (1.4 , 2.6 and 3.6) X 1021 cm-3, in a temperature range 2 -
10 K. PME, a low field anomaly in inhomogeneous superconductors could arise
from flux trapping, flux compression, or for non-trivial reason such as
emergent Josephson Pi junctions. Joint occurrence of PME and spin glass type
anomalies points to possible emergence of Pi junctions. BDD is a disordered
s-wave superconductor; and Pi junctions could be produced by spin flip
scattering of spin half moments when present at weak superconducting regions
(Bulaevski et al. 1978). A frustrated network of 0 and Pi junctions will result
(Kusmartsev et al. 1992) in a distribution of spontaneous equilibrium
supercurrents, a phase glass state. Anderson localized spin half spinons
embedded in a metallic fluid (two fluid model of Bhatt et al.) could create Pi
junction by spin flip scattering. Our findings are consistent with presence of
Pi junctions, invoked to explain their (Bhattacharyya et al.) observation of
certain resistance anomaly in BDD.
|
[{'version': 'v1', 'created': 'Tue, 23 Jun 2020 05:41:26 GMT'}]
|
2020-06-24
|
[array(['Govindaraj', 'L.', ''], dtype=object)
array(['Arumugam', 'S.', ''], dtype=object)
array(['Thiyagarajan', 'R.', ''], dtype=object)
array(['Kumar', 'Dinesh', ''], dtype=object)
array(['Kannan', 'M.', ''], dtype=object)
array(['Das', 'Dhrubha', ''], dtype=object)
array(['Suraj', 'T. S.', ''], dtype=object)
array(['Sankaranarayanan', 'V.', ''], dtype=object)
array(['Sethupathi', 'K.', ''], dtype=object)
array(['Baskaran', 'G.', ''], dtype=object)
array(['Sankar', 'Raman', ''], dtype=object)
array(['Rao', 'M. S. Ramachandra', ''], dtype=object)]
|
3,860 |
2305.13683
|
Shijie Chen
|
Shijie Chen, Ziru Chen, Huan Sun, Yu Su
|
Error Detection for Text-to-SQL Semantic Parsing
| null | null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Despite remarkable progress in text-to-SQL semantic parsing in recent years,
the performance of existing parsers is still far from perfect. At the same
time, modern deep learning based text-to-SQL parsers are often over-confident
and thus casting doubt on their trustworthiness when deployed for real use. To
that end, we propose to build a parser-independent error detection model for
text-to-SQL semantic parsing. The proposed model is based on pre-trained
language model of code and is enhanced with structural features learned by
graph neural networks. We train our model on realistic parsing errors collected
from a cross-domain setting. Experiments with three strong text-to-SQL parsers
featuring different decoding mechanisms show that our approach outperforms
parser-dependent uncertainty metrics and could effectively improve the
performance and usability of text-to-SQL semantic parsers regardless of their
architectures.
|
[{'version': 'v1', 'created': 'Tue, 23 May 2023 04:44:22 GMT'}]
|
2023-05-24
|
[array(['Chen', 'Shijie', ''], dtype=object)
array(['Chen', 'Ziru', ''], dtype=object)
array(['Sun', 'Huan', ''], dtype=object)
array(['Su', 'Yu', ''], dtype=object)]
|
3,861 |
0907.5478
|
Thomas Speck
|
Udo Seifert and Thomas Speck
|
Fluctuation-Dissipation Theorem in Nonequilibrium Steady States
|
6 pages; EPL, in press
|
EPL 89, 10007 (2010)
|
10.1209/0295-5075/89/10007
| null |
cond-mat.stat-mech cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In equilibrium, the fluctuation-dissipation theorem (FDT) expresses the
response of an observable to a small perturbation by a correlation function of
this variable with another one that is conjugate to the perturbation with
respect to \emph{energy}. For a nonequilibrium steady state (NESS), the
corresponding FDT is shown to involve in the correlation function a variable
that is conjugate with respect to \emph{entropy}. By splitting up entropy
production into one of the system and one of the medium, it is shown that for
systems with a genuine equilibrium state the FDT of the NESS differs from its
equilibrium form by an additive term involving \emph{total} entropy production.
A related variant of the FDT not requiring explicit knowledge of the stationary
state is particularly useful for coupled Langevin systems. The \emph{a priori}
surprising freedom apparently involved in different forms of the FDT in a NESS
is clarified.
|
[{'version': 'v1', 'created': 'Fri, 31 Jul 2009 07:35:26 GMT'}
{'version': 'v2', 'created': 'Tue, 15 Dec 2009 21:53:40 GMT'}]
|
2010-10-13
|
[array(['Seifert', 'Udo', ''], dtype=object)
array(['Speck', 'Thomas', ''], dtype=object)]
|
3,862 |
1411.7476
|
Alexey Miroshnikov
|
Pierre-Emmanuel Jabin, Alexey Miroshnikov, Robin Young
|
Cellulose Biodegradation Models; An Example of Cooperative Interactions
in Structured Populations
|
37 pages, accepted to ESAIM: Mathematical Modelling and Numerical
Analysis (2017)
|
ESAIM: M2AN, Volume 51, Number 6, pages 2289-2318, (2017)
|
10.1051/m2an/2017021
| null |
math.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce various models for cellulose bio-degradation by micro-organisms.
Those models rely on complex chemical mechanisms, involve the structure of the
cellulose chains and are allowed to depend on the phenotypical traits of the
population of micro-organisms. We then use the corresponding models in the
context of multiple-trait populations. This leads to classical, logistic type,
reproduction rates limiting the growth of large populations but also, and more
surprisingly, limiting the growth of populations which are too small in a
manner similar to the effects seen in populations requiring cooperative
interactions (or sexual reproduction). This study hence offers a striking
example of how some mechanisms resembling cooperation can occur in structured
biological populations, even in the absence of any actual cooperation.
|
[{'version': 'v1', 'created': 'Thu, 27 Nov 2014 06:15:23 GMT'}
{'version': 'v2', 'created': 'Thu, 19 Feb 2015 19:54:43 GMT'}
{'version': 'v3', 'created': 'Sun, 4 Sep 2016 19:33:47 GMT'}
{'version': 'v4', 'created': 'Sun, 30 Apr 2017 02:17:57 GMT'}
{'version': 'v5', 'created': 'Fri, 1 Sep 2017 18:00:56 GMT'}]
|
2020-11-09
|
[array(['Jabin', 'Pierre-Emmanuel', ''], dtype=object)
array(['Miroshnikov', 'Alexey', ''], dtype=object)
array(['Young', 'Robin', ''], dtype=object)]
|
3,863 |
2105.07637
|
Pengyang Li
|
Pengyang Li, Yanan Li, Han Cui and Donghui Wang
|
Class-Incremental Few-Shot Object Detection
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Conventional detection networks usually need abundant labeled training
samples, while humans can learn new concepts incrementally with just a few
examples. This paper focuses on a more challenging but realistic
class-incremental few-shot object detection problem (iFSD). It aims to
incrementally transfer the model for novel objects from only a few annotated
samples without catastrophically forgetting the previously learned ones. To
tackle this problem, we propose a novel method LEAST, which can transfer with
Less forgetting, fEwer training resources, And Stronger Transfer capability.
Specifically, we first present the transfer strategy to reduce unnecessary
weight adaptation and improve the transfer capability for iFSD. On this basis,
we then integrate the knowledge distillation technique using a less
resource-consuming approach to alleviate forgetting and propose a novel
clustering-based exemplar selection process to preserve more discriminative
features previously learned. Being a generic and effective method, LEAST can
largely improve the iFSD performance on various benchmarks.
|
[{'version': 'v1', 'created': 'Mon, 17 May 2021 06:49:29 GMT'}
{'version': 'v2', 'created': 'Tue, 28 Dec 2021 09:07:36 GMT'}]
|
2021-12-30
|
[array(['Li', 'Pengyang', ''], dtype=object)
array(['Li', 'Yanan', ''], dtype=object)
array(['Cui', 'Han', ''], dtype=object)
array(['Wang', 'Donghui', ''], dtype=object)]
|
3,864 |
1411.1682
|
Federico Valmorra
|
Federico Valmorra, Giacomo Scalari, Keita Ohtani, Mattias Beck, and
Jerome Faist
|
InGaAs/AlInGaAs THz Quantum Cascade Lasers operating up to 195 K in
strong magnetic field
| null |
New J. Phys. 17 (2015) 023050
|
10.1088/1367-2630/17/2/023050
| null |
physics.optics cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Terahertz quantum cascade lasers based on InGaAs wells and quaternary
AlInGaAs barriers were measured in magnetic field. This study was carried out
on a four quantum well active region design with photon energy of 14.3 meV
processed both with Au and Cu waveguides. The heterostructure operates up to
148 K at B=0 T and in a Cu waveguide. The complete magneto-spectroscopic study
allowed the comparison of emission and transport data. Increasing the magnetic
field, the low effective mass of the InGaAs wells allowed us to reach the very
strong confinement regime. At B=12 T, where the cyclotron transition is almost
resonant with the LO-phonon, we recorded a maximum operating temperature of 195
K for the devices with Cu waveguide. Additional lasing at 5.9 meV was detected
for magnetic fields between 7.3 and 7.7 T.
|
[{'version': 'v1', 'created': 'Thu, 6 Nov 2014 18:18:24 GMT'}
{'version': 'v2', 'created': 'Fri, 20 Feb 2015 17:05:27 GMT'}]
|
2015-02-23
|
[array(['Valmorra', 'Federico', ''], dtype=object)
array(['Scalari', 'Giacomo', ''], dtype=object)
array(['Ohtani', 'Keita', ''], dtype=object)
array(['Beck', 'Mattias', ''], dtype=object)
array(['Faist', 'Jerome', ''], dtype=object)]
|
3,865 |
2004.03417
|
Nicolas Marie
|
Fabienne Comte and Nicolas Marie
|
Nonparametric Estimation for I.I.D. Paths of Fractional SDE
|
30 pages
| null | null | null |
math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper deals with nonparametric estimators of the drift function $b$
computed from independent continuous observations, on a compact time interval,
of the solution of a stochastic differential equation driven by the fractional
Brownian motion (fSDE). First, a risk bound is established on a Skorokhod's
integral based least squares oracle $\widehat b$ of $b$. Thanks to the
relationship between the solution of the fSDE and its derivative with respect
to the initial condition, a risk bound is deduced on a calculable approximation
of $\widehat b$. Another bound is directly established on an estimator of $b'$
for comparison. The consistency and rates of convergence are established for
these estimators in the case of the compactly supported trigonometric basis or
the $\mathbb R$-supported Hermite basis.
|
[{'version': 'v1', 'created': 'Sat, 4 Apr 2020 21:03:30 GMT'}
{'version': 'v2', 'created': 'Mon, 31 May 2021 14:22:19 GMT'}]
|
2021-06-02
|
[array(['Comte', 'Fabienne', ''], dtype=object)
array(['Marie', 'Nicolas', ''], dtype=object)]
|
3,866 |
0910.0946
|
Theodor M\"uller
|
R. Diestel, K. Kawarabayashi, T. M\"uller, P. Wollan
|
On the excluded minor structure theorem for graphs of large treewidth
| null | null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
At the core of the Robertson-Seymour theory of graph minors lies a powerful
structure theorem which captures, for any fixed graph H, the common structural
features of all the graphs not containing H as a minor. Robertson and Seymour
prove several versions of this theorem, each stressing some particular aspects
needed at a corresponding stage of the proof of the main result of their
theory, the graph minor theorem.
We prove a new version of this structure theorem: one that seeks to combine
maximum applicability with a minimum of technical ado, and which might serve as
a canonical version for future applications in the broader field of graph minor
theory. Our proof departs from a simpler version proved explicitly by Robertson
and Seymour. It then uses a combination of traditional methods and new
techniques to derive some of the more subtle features of other versions as well
as further useful properties, with substantially simplified proofs.
|
[{'version': 'v1', 'created': 'Tue, 6 Oct 2009 08:26:34 GMT'}
{'version': 'v2', 'created': 'Mon, 12 Dec 2011 09:48:03 GMT'}]
|
2011-12-13
|
[array(['Diestel', 'R.', ''], dtype=object)
array(['Kawarabayashi', 'K.', ''], dtype=object)
array(['Müller', 'T.', ''], dtype=object)
array(['Wollan', 'P.', ''], dtype=object)]
|
3,867 |
1904.00529
|
Brandon Marshall
|
Brandon Marshall, Sung-ju Kang, C.R. Kerton, Youngsik Kim, Minho Choi,
and Miju Kang
|
High-Resolution Observations of the Molecular Clouds Associated with the
Huge HII Region CTB 102
|
16 pages, 8 figures, 5 tables
| null |
10.3847/1538-4357/ab1264
| null |
astro-ph.GA astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report the first high-resolution (sub-arcminute) large-scale mapping
$^{12}$CO and $^{13}$CO observations of the molecular clouds associated with
the giant outer Galaxy HII region CTB~102 (KR 1). These observations were made
using a newly commissioned receiver system on the 13.7-m radio telescope at the
Taeduk Radio Astronomy Observatory. Our observations show that the molecular
clouds have a spatial extent of $60 \times 35$ pc and a total mass of $10^{4.8}
- 10^{5.0}$ M$_\odot$. Infrared data from WISE and 2MASS were used to identify
and classify the YSO population associated with ongoing star formation activity
within the molecular clouds. We directly detect 18 class I/class II YSOs and
six transition disk objects. Moving away from the HII region, there is an
age/class gradient consistent with sequential star formation. The infrared and
molecular-line data were combined to estimate the star formation efficiency
(SFE) of the entire cloud as well as the SFE for various sub-regions of the
cloud. We find that the overall SFE is between $\sim5 - 10$%, consistent with
previous observations of giant molecular clouds. One of the sub-regions, region
1a, is a clear outlier, with a SFE of 17 $-$ 35% on a 5 pc spatial scale. This
high SFE is more typical for much smaller (sub-pc scale) star-forming cores,
and we think region 1a is likely an embedded massive protocluster.
|
[{'version': 'v1', 'created': 'Mon, 1 Apr 2019 01:26:00 GMT'}]
|
2019-05-08
|
[array(['Marshall', 'Brandon', ''], dtype=object)
array(['Kang', 'Sung-ju', ''], dtype=object)
array(['Kerton', 'C. R.', ''], dtype=object)
array(['Kim', 'Youngsik', ''], dtype=object)
array(['Choi', 'Minho', ''], dtype=object)
array(['Kang', 'Miju', ''], dtype=object)]
|
3,868 |
2105.08148
|
Ryleigh Moore
|
Ryleigh A. Moore and Akil Narayan
|
Adaptive Density Tracking by Quadrature for Stochastic Differential
Equations
|
20 pages, 6 figures
| null | null | null |
math.NA cs.NA
|
http://creativecommons.org/licenses/by/4.0/
|
Density tracking by quadrature (DTQ) is a numerical procedure for computing
solutions to Fokker-Planck equations that describe probability densities for
stochastic differential equations (SDEs). In this paper, we extend upon
existing tensorized DTQ procedures by utilizing a flexible quadrature rule that
allows for unstructured, adaptive meshes. We propose and describe the procedure
for $N$-dimensions, and demonstrate that the resulting adaptive procedure is
significantly more efficient than a tensorized approach. Although we consider
two-dimensional examples, all our computational procedures are extendable to
higher dimensional problems.
|
[{'version': 'v1', 'created': 'Mon, 17 May 2021 20:27:40 GMT'}
{'version': 'v2', 'created': 'Wed, 8 Jun 2022 16:22:59 GMT'}]
|
2022-06-09
|
[array(['Moore', 'Ryleigh A.', ''], dtype=object)
array(['Narayan', 'Akil', ''], dtype=object)]
|
3,869 |
1501.03367
|
Brandon Seward
|
Brandon Seward
|
Krieger's finite generator theorem for actions of countable groups II
| null | null | null | null |
math.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We continue the study of Rokhlin entropy, an isomorphism invariant for
probability-measure-preserving actions of countable groups introduced in the
previous paper. We prove that every free ergodic action with finite Rokhlin
entropy admits generating partitions which are almost Bernoulli, strengthening
the theorem of Ab\'{e}rt--Weiss that all free actions weakly contain Bernoulli
shifts. We then use this result to study the Rokhlin entropy of Bernoulli
shifts. Under the assumption that every countable group admits a free ergodic
action of positive Rokhlin entropy, we prove that: (i) the Rokhlin entropy of a
Bernoulli shift is equal to the Shannon entropy of its base; (ii) Bernoulli
shifts have completely positive Rokhlin entropy; and (iii) Gottschalk's
surjunctivity conjecture and Kaplansky's direct finiteness conjecture are true.
|
[{'version': 'v1', 'created': 'Wed, 14 Jan 2015 15:16:53 GMT'}
{'version': 'v2', 'created': 'Thu, 22 Jan 2015 17:41:55 GMT'}
{'version': 'v3', 'created': 'Tue, 30 May 2017 16:47:04 GMT'}
{'version': 'v4', 'created': 'Sun, 7 Apr 2019 18:56:21 GMT'}]
|
2019-04-09
|
[array(['Seward', 'Brandon', ''], dtype=object)]
|
3,870 |
2210.03628
|
Tomas Van Der Velde MSc
|
Tomas van der Velde, Hamidreza Kasaei
|
GraspCaps: Capsule Networks Are All You Need for Grasping Familiar
Objects
|
Submitted to ICRA 2023, Supplementary video:
https://youtu.be/duuEDnk6HNw
| null | null | null |
cs.RO cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
As robots become more accessible outside of industrial settings, the need for
reliable object grasping and manipulation grows significantly. In such dynamic
environments it is expected that the robot is capable of reliably grasping and
manipulating novel objects in different situations. In this work we present
GraspCaps: a novel architecture based on Capsule Networks for generating
per-point grasp configurations for familiar objects. In our work, the
activation vector of each capsule in the deepest capsule layer corresponds to
one specific class of object. This way, the network is able to extract a rich
feature vector of the objects present in the point cloud input, which is then
used for generating per-point grasp vectors. This approach should allow the
network to learn specific grasping strategies for each of the different object
categories. Along with GraspCaps we present a method for generating a large
object grasping dataset using simulated annealing. The obtained dataset is then
used to train the GraspCaps network. We performed an extensive set of
experiments to assess the performance of the proposed approach regarding
familiar object recognition accuracy and grasp success rate on challenging real
and simulated scenarios.
|
[{'version': 'v1', 'created': 'Fri, 7 Oct 2022 15:32:34 GMT'}]
|
2022-10-10
|
[array(['van der Velde', 'Tomas', ''], dtype=object)
array(['Kasaei', 'Hamidreza', ''], dtype=object)]
|
3,871 |
2012.05367
|
Gustau Camps-Valls
|
Francisco Javier Garc\'ia-Haro, Manuel Campos-Taberner, Beatriz
Mart\'inez, Sergio S\'anchez-Ruiz, Mar\'ia Amparo Gilabert, Gustau
Camps-Valls, Jordi Mu\~noz-Mar\'i, Valero Laparra, Fernando Camacho, Jorge
Sanchez-Zapero, Beatriz Fuster
|
Generation of global vegetation products from EUMETSAT AVHRR/METOP
satellites
|
arXiv admin note: substantial text overlap with arXiv:2012.05151
| null |
10.1109/IGARSS.2018.8518083
| null |
eess.IV
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
We describe the methodology applied for the retrieval of global LAI, FAPAR
and FVC from Advanced Very High Resolution Radiometer (AVHRR) onboard the
Meteorological-Operational (MetOp) polar orbiting satellites also known as
EUMETSAT Polar System (EPS). A novel approach has been developed for the joint
retrieval of three parameters (LAI, FVC, and FAPAR) instead of training one
model per parameter. The method relies on multi-output Gaussian Processes
Regression (GPR) trained over PROSAIL EPS simulations. A sensitivity analysis
is performed to assess several sources of uncertainties in retrievals and
maximize the positive impact of modeling the noise in training simulations. We
describe the main features of the operational processing chain along with the
current status of the global EPS vegetation products, including details about
its overall quality and preliminary assessment of the products based on
intercomparison with equivalent (MODIS, PROBA-V) satellite vegetation products.
|
[{'version': 'v1', 'created': 'Mon, 7 Dec 2020 10:47:48 GMT'}]
|
2020-12-11
|
[array(['García-Haro', 'Francisco Javier', ''], dtype=object)
array(['Campos-Taberner', 'Manuel', ''], dtype=object)
array(['Martínez', 'Beatriz', ''], dtype=object)
array(['Sánchez-Ruiz', 'Sergio', ''], dtype=object)
array(['Gilabert', 'María Amparo', ''], dtype=object)
array(['Camps-Valls', 'Gustau', ''], dtype=object)
array(['Muñoz-Marí', 'Jordi', ''], dtype=object)
array(['Laparra', 'Valero', ''], dtype=object)
array(['Camacho', 'Fernando', ''], dtype=object)
array(['Sanchez-Zapero', 'Jorge', ''], dtype=object)
array(['Fuster', 'Beatriz', ''], dtype=object)]
|
3,872 |
1408.2429
|
Imre Leader
|
Neil Hindman, Imre Leader and Dona Strauss
|
Maximality of Infinite Partition Regular Matrices
| null | null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A finite or infinite matrix $A$ with rational entries (and only finitely many
non-zero entries in each row) is called image partition regular if, whenever
the natural numbers are finitely coloured, there is a vector $x$, with entries
in the natural numbers, such that $Ax$ is monochromatic. Many of the classical
results of Ramsey theory are naturally stated in terms of image partition
regularity.
Our aim in this paper is to investigate maximality questions for image
partition regular matrices. When is it possible to add rows on to $A$ and
remain image partition regular? When can one add rows but `nothing new is
produced'? What about adding rows and also new variables? We prove some results
about extensions of the most interesting infinite systems, and make several
conjectures.
Perhaps our most surprising positive result is a compatibility result for
Milliken-Taylor systems, stating that (in many cases) one may adjoin one
Milliken-Taylor system to a translate of another and remain image partition
regular. This is in contrast to earlier results, which had suggested a strong
inconsistency between different Milliken-Taylor systems. Our main tools for
this are some algebraic properties of the $\beta N$, the Stone-Cech
compactification of the natural numbers.
|
[{'version': 'v1', 'created': 'Mon, 11 Aug 2014 14:50:43 GMT'}]
|
2014-08-12
|
[array(['Hindman', 'Neil', ''], dtype=object)
array(['Leader', 'Imre', ''], dtype=object)
array(['Strauss', 'Dona', ''], dtype=object)]
|
3,873 |
1510.01661
|
Carl Wang-Erickson
|
Preston Wake, Carl Wang-Erickson
|
Ordinary pseudorepresentations and modular forms
|
Final version, to appear in Proc. Amer. Math. Soc. 14 pages
|
Proc. Amer. Math. Soc. Ser. B 4 (2017), 53-71
|
10.1090/bproc/29
| null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this short note, we observe that the techniques of our recent work
"Pseudo-modularity and Iwasawa theory" can be used to provide a new proof of
some of the residually reducible modularity lifting results of Skinner and
Wiles. In these cases, we have found that a deformation ring of ordinary
pseudorepresentations is equal to the Eisenstein local component of a Hida
Hecke algebra. We also show that Vandiver's conjecture implies Sharifi's
conjecture.
|
[{'version': 'v1', 'created': 'Tue, 6 Oct 2015 16:54:08 GMT'}
{'version': 'v2', 'created': 'Sat, 28 Nov 2015 18:44:21 GMT'}
{'version': 'v3', 'created': 'Tue, 28 Jun 2016 16:25:27 GMT'}
{'version': 'v4', 'created': 'Mon, 30 Jan 2017 20:53:14 GMT'}]
|
2018-01-22
|
[array(['Wake', 'Preston', ''], dtype=object)
array(['Wang-Erickson', 'Carl', ''], dtype=object)]
|
3,874 |
math/0506063
|
Bertrand Deroin
|
Bertrand Deroin, Victor Kleptsyn, Andres Navas
|
Sur la dynamique unidimensionnelle en r\'egularit\'e interm\'ediaire
|
42 pages, 7 figures
|
Acta Math. 199 no. 2 (2007) 199-262
| null | null |
math.DS
| null |
Using probabilistic methods, we prove new rigidity results for groups and
pseudo-groups of diffeomorphisms of one dimensional manifolds with intermediate
regularity class ({\em i.e.} between $C^1$ and $C^2$). In particular, we
demonstrate some generalizations of Denjoy's Theorem and the classical Kopell's
Lemma for Abelian groups. After that, these techniques are applied to the study
of codimension 1 foliations. We obtain for instance several generalized
versions of Sacksteder's Theorem in class $C^1$. We conclude with some remarks
about the stationary measure.
|
[{'version': 'v1', 'created': 'Fri, 3 Jun 2005 13:06:31 GMT'}
{'version': 'v2', 'created': 'Wed, 6 Jul 2005 15:29:45 GMT'}
{'version': 'v3', 'created': 'Sun, 8 Jan 2006 19:12:52 GMT'}]
|
2011-12-30
|
[array(['Deroin', 'Bertrand', ''], dtype=object)
array(['Kleptsyn', 'Victor', ''], dtype=object)
array(['Navas', 'Andres', ''], dtype=object)]
|
3,875 |
1601.01858
|
Ankit Sharma
|
Ankit Sharma, Radha Krishna Ganti, J. Klutto Milleth
|
Joint Backhaul-Access Analysis of Full Duplex Self-Backhauling
Heterogeneous Networks
|
Remodeled using different large-scale path loss exponents for the
Macro Base Station tier and the Pico Base Station Tier. Other formatting
improvements. Submitted to IEEE Transactions on Wireless Communication
| null |
10.1109/TWC.2017.2653108
|
Paper-TW-Jan-16-0025
|
cs.NI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
With the successful demonstration of in-band full-duplex (IBFD) transceivers,
a new research dimension has been added to wireless networks. This paper
proposes an interesting use case of this capability for IBFD self-backhauling
heterogeneous networks (HetNet). IBFD self-backhauling in a HetNet refers to
IBFD-enabled small cells backhauling themselves with macro cells over the
wireless channel. Owing to their IBFD capability, the small cells
simultaneously communicate over the access and backhaul links, using the same
frequency band. The idea is doubly advantageous, as it obviates the need for
fiber backhauling small cells every hundred meters and allows the access
spectrum to be reused for backhauling at no extra cost. This work considers the
case of a two-tier cellular network with IBFD-enabled small cells, wirelessly
backhauling themselves with conventional macro cells. For clear exposition, the
case considered is that of FDD network, where within access and backhaul links,
the downlink (DL) and uplink (UL) are frequency duplexed ($f1$, $f2$
respectively), while the total frequency spectrum used at access and backhaul
($f1+f2$) is the same. Analytical expressions for coverage and average downlink
(DL) rate in such a network are derived using tools from the field of
stochastic geometry. It is shown that DL rate in such networks could be close
to double that of a conventional TDD/FDD self-backhauling network, at the
expense of reduced coverage due to higher interference in IBFD networks. For
the proposed IBFD network, the conflicting aspects of increased interference on
one side and high spectral efficiency on the other are captured into a
mathematical model. The mathematical model introduces an end-to-end joint
analysis of backhaul (or fronthaul) and access links, in contrast to the
largely available access-centric studies.
|
[{'version': 'v1', 'created': 'Fri, 8 Jan 2016 12:38:10 GMT'}
{'version': 'v2', 'created': 'Mon, 11 Jan 2016 12:50:37 GMT'}
{'version': 'v3', 'created': 'Wed, 11 Jan 2017 03:11:48 GMT'}]
|
2017-02-21
|
[array(['Sharma', 'Ankit', ''], dtype=object)
array(['Ganti', 'Radha Krishna', ''], dtype=object)
array(['Milleth', 'J. Klutto', ''], dtype=object)]
|
3,876 |
hep-th/9112015
|
Keith R. Dienes
|
Keith R. Dienes (McGill University) and S.-H. Henry Tye (Cornell
University)
|
Model-Building for Fractional Superstrings
|
(Paper is between 70-80 pages, depending on fonts used. A macro is
enclosed for printing in a two-page landscape format to halve the total
number of printed pages.)
|
Nucl.Phys. B376 (1992) 297-349
|
10.1016/0550-3213(92)90127-W
| null |
hep-th
| null |
Fractional superstrings are recently-proposed generalizations of the
traditional superstrings and heterotic strings. They have critical spacetime
dimensions which are less than ten, and in this paper we investigate
model-building for the heterotic versions of these new theories. We concentrate
on the cases with critical spacetime dimensions four and six, and find that a
correspondence can be drawn between the new fractional superstring models and a
special subset of the traditional heterotic string models. This allows us to
generate the partition functions of the new models, and demonstrate that their
number is indeed relatively limited. It also appears that these strings have
uniquely natural compactifications to lower dimensions. In particular, the
fractional superstring with critical dimension six has a natural interpretation
in four-dimensional spacetime.
|
[{'version': 'v1', 'created': 'Fri, 6 Dec 1991 23:01:15 GMT'}]
|
2009-10-22
|
[array(['Dienes', 'Keith R.', '', 'McGill University'], dtype=object)
array(['Tye', 'S. -H. Henry', '', 'Cornell\n University'], dtype=object)]
|
3,877 |
0811.0812
|
Hye-Sung Lee
|
Taeil Hur, Hye-Sung Lee, Christoph Luhn
|
Common gauge origin of discrete symmetries in observable sector and
hidden sector
|
Version to appear in JHEP
|
JHEP 0901:081,2009
|
10.1088/1126-6708/2009/01/081
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An extra Abelian gauge symmetry is motivated in many new physics models in
both supersymmetric and nonsupersymmetric cases. Such a new gauge symmetry may
interact with both the observable sector and the hidden sector. We
systematically investigate the most general residual discrete symmetries in
both sectors from a common Abelian gauge symmetry. Those discrete symmetries
can ensure the stability of the proton and the dark matter candidate. A hidden
sector dark matter candidate (lightest U-parity particle or LUP) interacts with
the standard model fields through the gauge boson Z', which may selectively
couple to quarks or leptons only. We make a comment on the implications of the
discrete symmetry and the leptonically coupling dark matter candidate, which
has been highlighted recently due to the possibility of the simultaneous
explanation of the DAMA and the PAMELA results. We also show how to construct
the most general U(1) charges for a given discrete symmetry, and discuss the
relation between the U(1) gauge symmetry and R-parity.
|
[{'version': 'v1', 'created': 'Wed, 5 Nov 2008 20:46:24 GMT'}
{'version': 'v2', 'created': 'Fri, 30 Jan 2009 18:29:06 GMT'}]
|
2009-02-09
|
[array(['Hur', 'Taeil', ''], dtype=object)
array(['Lee', 'Hye-Sung', ''], dtype=object)
array(['Luhn', 'Christoph', ''], dtype=object)]
|
3,878 |
1203.6097
|
Issam Kaddoura I.K.
|
Issam Kaddoura
|
De-suspension of free S3 - actions on Homotopy Spheres
|
8 pages
| null | null | null |
math.GT math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the paper of Montgomery, D. and Yang, C.T. [5], they discuss the
de-suspension of smooth free actions of S1 on (2n+1)-dimensional homotopy
spheres. In this paper we discuss the de-suspension of smooth free actions of
S3 on (4n + 3)-dimensional homotopy spheres.
|
[{'version': 'v1', 'created': 'Tue, 27 Mar 2012 22:33:06 GMT'}
{'version': 'v2', 'created': 'Sun, 6 May 2012 20:44:31 GMT'}]
|
2012-05-08
|
[array(['Kaddoura', 'Issam', ''], dtype=object)]
|
3,879 |
2103.09429
|
Slawomir Solecki
|
S{\l}awomir Solecki
|
Generic measure preserving transformations and the closed groups they
generate
| null | null | null | null |
math.DS math.FA math.LO math.RT math.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that, for a generic measure preserving transformation $T$, the closed
group generated by $T$ is not isomorphic to the topological group $L^0(\lambda,
{\mathbb T})$ of all Lebesgue measurable functions from $[0,1]$ to $\mathbb T$
(taken with pointwise multiplication and the topology of convergence in
measure). This result answers a question of Glasner and Weiss. The main step in
the proof consists of showing that Koopman representations of ergodic boolean
actions of $L^0(\lambda, {\mathbb T})$ possess a non-trivial spectral property
not shared by all unitary representations of $L^0(\lambda, {\mathbb T})$. The
main tool underlying our arguments is a theorem on the form of unitary
representations of $L^0(\lambda, {\mathbb T})$ from our earlier work.
|
[{'version': 'v1', 'created': 'Wed, 17 Mar 2021 04:05:34 GMT'}
{'version': 'v2', 'created': 'Sat, 20 Mar 2021 16:04:35 GMT'}
{'version': 'v3', 'created': 'Fri, 16 Jul 2021 17:03:00 GMT'}
{'version': 'v4', 'created': 'Sat, 3 Sep 2022 02:09:12 GMT'}]
|
2022-09-07
|
[array(['Solecki', 'Sławomir', ''], dtype=object)]
|
3,880 |
hep-ph/0301239
|
Gouranga C. Nayak
|
Andrew Chamblin (Queen Mary), Fred Cooper, and Gouranga C. Nayak
(LANL)
|
Interaction of a TeV Scale Black Hole with the Quark-Gluon Plasma at LHC
|
7 pages latex (double column), 3 eps figures
|
Phys.Rev.D69:065010,2004
|
10.1103/PhysRevD.69.065010
| null |
hep-ph astro-ph gr-qc hep-th
| null |
If the fundamental Planck scale is near a TeV, then parton collisions with
high enough center-of-mass energy should produce black holes. The production
rate for such black holes has been extensively studied for the case of a
proton-proton collision at \sqrt s = 14 TeV and for a lead-lead collision at
\sqrt s = 5.5 TeV at LHC. As the parton energy density is much higher at
lead-lead collisions than in pp collisions at LHC, one natural question is
whether the produced black holes will be able to absorb the partons formed in
the lead-lead collisions and eventually `eat' the quark-gluon plasma formed at
LHC. In this paper, we make a quantitative analysis of this possibility and
find that since the energy density of partons formed in lead-lead collisions at
LHC is about 500 GeV/fm^3, the rate of absorption for one of these black holes
is much smaller than the rate of evaporation. Hence, we argue that black holes
formed in such collisions will decay very quickly, and will not absorb very
many nearby partons. More precisely, we show that for the black hole mass to
increase via parton absorption at the LHC the typical energy density of quarks
and gluons should be of the order of 10^{10} GeV/fm^3. As LHC will not be able
to produce such a high energy density partonic system, the black hole will not
be able to absorb a sufficient number of nearby partons before it decays. The
typical life time of the black hole formed at LHC is found to be a small
fraction of a fm/c.
|
[{'version': 'v1', 'created': 'Tue, 28 Jan 2003 02:45:59 GMT'}]
|
2016-09-06
|
[array(['Chamblin', 'Andrew', '', 'Queen Mary'], dtype=object)
array(['Cooper', 'Fred', '', 'LANL'], dtype=object)
array(['Nayak', 'Gouranga C.', '', 'LANL'], dtype=object)]
|
3,881 |
1803.00790
|
Sarah Kaakai
|
Sarah Kaakai and Nicole El Karoui
|
Birth Death Swap population in random environment and aggregation with
two timescales
|
35 pages, 2 figures
| null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper deals with the stochastic modeling of a class of heterogeneous
population in a random environment, called birth-death-swap. In addition to
demographic events, swap events, i.e. moves between subgroups, occur in the
population. Event intensities are random functionals of the multi-type
population. In the first part, we show that the complexity of the problem is
significantly reduced by modeling the jumps measure of the population,
described by a multivariate counting process. This process is defined as a
solution of a stochastic differential system with random coefficients, driven
by a multivariate Poisson random measure. The solution is obtained under weak
assumptions, by the thinning of a strongly dominating point process generated
by the same Poisson measure. This key construction relies on a general strong
comparison result, of independent interest. The second part is dedicated to
averaging results when swap events are significantly more frequent than
demographic events. An important ingredient is the stable convergence, which is
well-adapted to the general random environment. The pathwise construction by
domination yields tightness results straightforwardly. At the limit, the
demographic intensity functionals are averaged against random kernels depending
on swap events. Finally, under a natural assumption, we show the convergence of
the aggregated population to a "true" birth-death process in random
environment, with non-linear intensity functionals.
|
[{'version': 'v1', 'created': 'Fri, 2 Mar 2018 10:18:15 GMT'}
{'version': 'v2', 'created': 'Fri, 13 Apr 2018 15:41:27 GMT'}
{'version': 'v3', 'created': 'Tue, 24 Dec 2019 17:19:44 GMT'}
{'version': 'v4', 'created': 'Mon, 7 Dec 2020 15:41:46 GMT'}]
|
2020-12-08
|
[array(['Kaakai', 'Sarah', ''], dtype=object)
array(['Karoui', 'Nicole El', ''], dtype=object)]
|
3,882 |
1706.08813
|
Masoud Hassani
|
Masoud Hassani (LMA)
|
On the irreducible action of psl(2, r) on the 3-dimensional einstein
universe
| null | null | null | null |
math.DG math.MG math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We describe the orbits of the irreducible action of PSL(2, R) on the
3-dimensional Einstein universe Ein 1,2. This work completes the study in [2],
and is one element of the classification of cohomo-geneity one actions on Ein
1,2 ([5]).
|
[{'version': 'v1', 'created': 'Tue, 27 Jun 2017 12:21:48 GMT'}]
|
2017-06-28
|
[array(['Hassani', 'Masoud', '', 'LMA'], dtype=object)]
|
3,883 |
2104.08545
|
Kuniyasu Saitoh
|
Shoichi Takahata, Norihiro Oyama, and Kuniyasu Saitoh
|
Localized and extended dynamical correlation lengths in jammed packings
of soft athermal disks under slow shear
|
12 pages, 11 figures
| null | null | null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Dynamics of jammed packings of soft athermal disks under finite-rate shear
are studied by means of molecular dynamics simulations. Particularly, we
investigate the spatial structures of stress drop events, which are expected to
provide information about plasticity. Investigating the displacement fields
during stress drop events, we show that there are qualitatively different two
types of events in the low rate limit: localized ones and extended ones. We
further investigate the time evolution of events and clarify that both types of
events are due to oscillatory motion of the stress, which is unique for systems
under finite-rate shear. The difference between two types of events is the
regime that events reside in: while localized events take place during plastic
events, extended ones occur in the elastic branch.
|
[{'version': 'v1', 'created': 'Sat, 17 Apr 2021 13:57:37 GMT'}]
|
2021-04-20
|
[array(['Takahata', 'Shoichi', ''], dtype=object)
array(['Oyama', 'Norihiro', ''], dtype=object)
array(['Saitoh', 'Kuniyasu', ''], dtype=object)]
|
3,884 |
2204.05131
|
Lianhua Zhang
|
Lianhua Zhang, Jian Chen, Fei Liu, Zhengyang Du, Yilun Jiang, Min Han,
Guanghou Wang
|
Charge transport in monolayers of metal nanoparticles
|
27 pages, 17 figures
| null | null | null |
cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
Two-dimensional (2D) nanoparticle films are a new class of materials with
interesting physical properties and applications ranging from nanoelectronics
to sensing and photonics. The importance of conducting nanoparticle films makes
the fundamental understanding of their charge transport extremely important for
materials and process design. Various hopping and transport mechanisms have
been proposed and the nanoparticle monolayer is consistent with the electrical
equivalent RC circuit, but their theoretical methods are limited to the model
of the single electron tunneling between capacitively coupled nanoparticles
with a characteristic time constant RC and the conductivity of thin film is the
experimental conductivity, which cannot be deduced from these theoretical
models. It is also unclear that how the specific process of electron transpot
is affected by temperature. So, nowadays the electron dynamics of thin film
cannot be understood fundamentally. Here, we develop an analytical theory based
on the model of Sommerfeld, backed up by Monte-Carlo simulations, that predicts
the process of charge transport and the effect of temperature on the electron
transport in the thin film. In this paper two different nanoparticle models
were built to cope with different types of morphology: triangular array and
rectangular array. The transport properties of these different kinds of arrays
including 2D ordered nanoparticle arrays with/without local structural disorder
and 2D gradient nanoparticle arrays were investigated at different
temperatures. For 2D well-ordered nanoparticle array without local structural
disorder, the I-V curves are non-linear and highly symmetric.
|
[{'version': 'v1', 'created': 'Tue, 5 Apr 2022 23:55:53 GMT'}]
|
2022-04-12
|
[array(['Zhang', 'Lianhua', ''], dtype=object)
array(['Chen', 'Jian', ''], dtype=object)
array(['Liu', 'Fei', ''], dtype=object)
array(['Du', 'Zhengyang', ''], dtype=object)
array(['Jiang', 'Yilun', ''], dtype=object)
array(['Han', 'Min', ''], dtype=object)
array(['Wang', 'Guanghou', ''], dtype=object)]
|
3,885 |
1711.09848
|
Marko Lindner
|
Marko Lindner, Hagen S\"oding
|
Finite sections of the Fibonacci Hamiltonian
| null | null | null | null |
math-ph math.DS math.MP math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study finite but growing principal square submatrices $A_n$ of the one- or
two-sided infinite Fibonacci Hamiltonian $A$. Our results show that such a
sequence $(A_n)$, no matter how the points of truncation are chosen, is always
stable -- implying that $A_n$ is invertible for sufficiently large $n$ and
$A_n^{-1}\to A^{-1}$ pointwise.
|
[{'version': 'v1', 'created': 'Mon, 27 Nov 2017 17:36:06 GMT'}]
|
2017-11-28
|
[array(['Lindner', 'Marko', ''], dtype=object)
array(['Söding', 'Hagen', ''], dtype=object)]
|
3,886 |
1108.5978
|
Risto H\"anninen
|
J.M. Karim\"aki, R. H\"anninen and E.V. Thuneberg
|
Asymptotic motion of a single vortex in a rotating cylinder
|
9 pages, 10 figures. Considerable changes, now close to the published
version
|
Phys. Rev. B 85, 224519 (2012)
|
10.1103/PhysRevB.85.224519
| null |
cond-mat.other
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study numerically the behavior of a single quantized vortex in a rotating
cylinder. We study in particular the spiraling motion of a vortex in a cylinder
that is parallel to the rotation axis. We determine the asymptotic form of the
vortex and its axial and azimuthal propagation velocities under a wide range of
parameters. We also study the stability of the vortex line and the effect of
tilting the cylinder from the rotation axis.
|
[{'version': 'v1', 'created': 'Tue, 30 Aug 2011 15:11:45 GMT'}
{'version': 'v2', 'created': 'Mon, 8 Apr 2013 13:13:57 GMT'}]
|
2013-04-09
|
[array(['Karimäki', 'J. M.', ''], dtype=object)
array(['Hänninen', 'R.', ''], dtype=object)
array(['Thuneberg', 'E. V.', ''], dtype=object)]
|
3,887 |
1007.0652
|
David Coupier
|
David Coupier and Philippe Heinrich
|
Coexistence probability in the last passage percolation model is
$6-8\log2$
|
21 pages, 7 figures
| null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A competition model on $\N^{2}$ between three clusters and governed by
directed last passage percolation is considered. We prove that coexistence,
i.e. the three clusters are simultaneously unbounded, occurs with probability
$6-8\log2$. When this happens, we also prove that the central cluster almost
surely has a positive density on $\N^{2}$. Our results rely on three couplings,
allowing to link the competition interfaces (which represent the borderlines
between the clusters) to some particles in the multi-TASEP, and on recent
results about collision in the multi-TASEP.
|
[{'version': 'v1', 'created': 'Mon, 5 Jul 2010 10:08:09 GMT'}]
|
2010-07-06
|
[array(['Coupier', 'David', ''], dtype=object)
array(['Heinrich', 'Philippe', ''], dtype=object)]
|
3,888 |
cond-mat/0505434
|
Erkan Tuzel
|
Thomas Ihle, Erkan Tuzel, Daniel M. Kroll
|
Equilibrium calculation of transport coefficients for a fluid-particle
model
|
19 pages including 6 figures; a figure added to the revised version
|
Phys. Rev. E 72, 046707 (2005)
|
10.1103/PhysRevE.72.046707
| null |
cond-mat.soft cond-mat.stat-mech
| null |
A recently introduced particle-based model for fluid flow, called Stochastic
Rotation Dynamics, can be made Galilean invariant by introducing a random shift
of the computational grid before collisions. In this paper, it is shown how the
Green-Kubo relations derived previously can be resummed to obtain exact
expressions for the collisional contributions to the transport coefficients. It
is also shown that the collisional contribution to the microscopic stress
tensor is not symmetric, and that this leads to an additional viscosity. The
resulting identification of the transport coefficients for the hydrodynamic
modes is discussed in detail, and it is shown that this does not impose
restrictions on the applicability of the model. The collisional contribution to
the thermal conductivity, which becomes important for small mean free path and
small average particle number per cell, is also derived.
|
[{'version': 'v1', 'created': 'Wed, 18 May 2005 02:47:17 GMT'}
{'version': 'v2', 'created': 'Mon, 26 Sep 2005 02:32:15 GMT'}]
|
2009-11-11
|
[array(['Ihle', 'Thomas', ''], dtype=object)
array(['Tuzel', 'Erkan', ''], dtype=object)
array(['Kroll', 'Daniel M.', ''], dtype=object)]
|
3,889 |
1208.5352
|
Kouichi Hagino
|
Y. Tanimura, K. Hagino, and H. Sagawa
|
Impurity effect of Lambda particle on the structure of 18F and
19F_Lambda
|
8 pages, 3 figures
| null |
10.1103/PhysRevC.86.044331
| null |
nucl-th nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We perform three-body model calculations for a $sd$-shell hypernucleus
$^{19}_{\Lambda}$F ($^{17}_{\Lambda}{\rm O}+p+n$) and its core nucleus $^{18}$F
($^{16}{\rm O}+p+n$), employing a density-dependent contact interaction between
the valence proton and neutron. We find that the $B(E2)$ value from the first
excited state (with spin and parity of $I^\pi=3^+$) to the ground state
($I^\pi=1^+$) is slightly decreased by the addition of a $\Lambda$ particle,
which exhibits the so called shrinkage effect of $\Lambda$ particle. We also
show that the excitation energy of the $3^+$ state is reduced in
$^{19}_{\Lambda}$F compared to $^{18}$F, as is observed in a $p$-shell nucleus
$^{6}$Li. We discuss the mechanism of this reduction of the excitation energy,
pointing out that it is caused by a different mechanism from that in
$^{7}_{\Lambda}$Li.
|
[{'version': 'v1', 'created': 'Mon, 27 Aug 2012 10:08:42 GMT'}]
|
2015-06-11
|
[array(['Tanimura', 'Y.', ''], dtype=object)
array(['Hagino', 'K.', ''], dtype=object)
array(['Sagawa', 'H.', ''], dtype=object)]
|
3,890 |
1007.2479
|
Seyed Hossein Hendi
|
S. H. Hendi
|
Topological Black Holes in Gauss-Bonnet Gravity with conformally
invariant Maxwell source
|
17 pages, 4 figures, some references added
|
Phys.Lett.B677:123-132,2009
|
10.1016/j.physletb.2009.03.085
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we present a class of rotating solutions in Gauss--Bonnet
gravity in the presence of cosmological constant and conformally invariant
Maxwell field and study the effects of the nonlinearity of the Maxwell source
on the properties of the spacetimes. These solutions may be interpret as black
brane solutions with inner and outer event horizons provide that the mass
parameter $m$ is greater than an extremal value $m_{ext}$, an extreme black
brane if $m=m_{ext}$ and a naked singularity otherwise. We investigate the
conserved and thermodynamics quantities for asymptotically flat and
asymptotically $AdS$ with flat horizon. We also show that the conserved and
thermodynamic quantities of these solutions satisfy the first law of
thermodynamics.
|
[{'version': 'v1', 'created': 'Thu, 15 Jul 2010 05:24:31 GMT'}
{'version': 'v2', 'created': 'Tue, 3 Aug 2010 13:58:17 GMT'}]
|
2014-11-21
|
[array(['Hendi', 'S. H.', ''], dtype=object)]
|
3,891 |
2110.12262
|
Robert Viator Jr
|
Robert Lipton, Robert Viator, Silvia Jimenez Bolanos, Abiti Adili
|
Bloch Waves in High Contrast Electromagnetic Crystals
|
arXiv admin note: text overlap with arXiv:1512.06062,
arXiv:1607.02365, arXiv:2110.08405
| null | null | null |
math.AP physics.optics
|
http://creativecommons.org/licenses/by/4.0/
|
Analytic representation formulas and power series are developed describing
the band structure inside non-magnetic periodic photonic three-dimensional
crystals made from high dielectric contrast inclusions. Central to this
approach is the identification and utilization of a resonance spectrum for
quasiperiodic source-free modes. These modes are used to represent solution
operators associated with electromagnetic and acoustic waves inside periodic
high contrast media. A convergent power series for the Bloch wave spectrum is
recovered from the representation formulas. Explicit conditions on the contrast
are found that provide lower bounds on the convergence radius. These conditions
are sufficient for the separation of spectral branches of the dispersion
relation for any fixed quasi-momentum.
|
[{'version': 'v1', 'created': 'Sat, 23 Oct 2021 17:14:26 GMT'}]
|
2021-10-26
|
[array(['Lipton', 'Robert', ''], dtype=object)
array(['Viator', 'Robert', ''], dtype=object)
array(['Bolanos', 'Silvia Jimenez', ''], dtype=object)
array(['Adili', 'Abiti', ''], dtype=object)]
|
3,892 |
1101.1942
|
Mehdi Rafie-Rad
|
Mehdi Rafie-Rad
|
Brachistochrone Pursuit - Evasion Games and Riemann-Finsler Geometry
|
This paper was a primary note and has been withdrawn by the author
due to some policies
| null | null | null |
math.OC math.DG
|
http://creativecommons.org/licenses/by/3.0/
|
A geometric approach to differential game theory is illustrated. The parallel
pursuit is considered as a two-player zero-sum differential game. The optimal
strategies of each player is designed based on Riemann-Finsler geometry. Our
approach incorporates a closed loop optimal control and the presentation is
familiar with a Brachistochrone type problem.
|
[{'version': 'v1', 'created': 'Mon, 10 Jan 2011 20:27:45 GMT'}
{'version': 'v2', 'created': 'Wed, 12 Jan 2011 20:51:24 GMT'}
{'version': 'v3', 'created': 'Thu, 19 Jul 2012 23:30:47 GMT'}]
|
2012-07-23
|
[array(['Rafie-Rad', 'Mehdi', ''], dtype=object)]
|
3,893 |
2012.02921
|
Ki Seok Kim
|
Jinho Yang, Iksu Jang, Jae-Ho Han, and Ki-Seok Kim
|
Role of generic scale invariance in a Mott transition from a U(1)
spin-liquid insulator to a Landau Fermi-liquid metal
| null | null |
10.1016/j.aop.2021.168462
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the role of generic scale invariance in a Mott transition from
a U(1) spin-liquid insulator to a Landau Fermi-liquid metal, where there exist
massless degrees of freedom in addition to quantum critical fluctuations. Here,
the Mott quantum criticality is described by critical charge fluctuations, and
additional gapless excitations are U(1) gauge-field fluctuations coupled to a
spinon Fermi surface in the spin-liquid state, which turn out to play a central
role in the Mott transition. An interesting feature of this problem is that the
scaling dimension of effective leading local interactions between critical
charge fluctuations differs from that of the coupling constant between U(1)
gauge fields and matter-field fluctuations in the presence of a Fermi surface.
As a result, there appear dangerously irrelevant operators, which can cause
conceptual difficulty in the implementation of renormalization group (RG)
transformations. Indeed, we find that the curvature term along the angular
direction of the spinon Fermi surface is dangerously irrelevant at this
spin-liquid Mott quantum criticality, responsible for divergence of the
self-energy correction term in U(1) gauge-field fluctuations. Performing the RG
analysis in the one-loop level based on the dimensional regularization method,
we reveal that such extremely overdamped dynamics of U(1) gauge-field
fluctuations, which originates from the emergent one-dimensional dynamics of
spinons, does not cause any renormalization effects to the effective dynamics
of both critical charge fluctuations and spinon excitations. However, it turns
out that the coupling between U(1) gauge-field fluctuations and both
matter-field excitations still persists at this Mott transition, which results
in novel mean-field dynamics to explain the nature of the spin-liquid Mott
quantum criticality.
|
[{'version': 'v1', 'created': 'Sat, 5 Dec 2020 01:44:31 GMT'}
{'version': 'v2', 'created': 'Mon, 14 Dec 2020 04:51:26 GMT'}
{'version': 'v3', 'created': 'Wed, 24 Feb 2021 03:08:41 GMT'}]
|
2021-05-19
|
[array(['Yang', 'Jinho', ''], dtype=object)
array(['Jang', 'Iksu', ''], dtype=object)
array(['Han', 'Jae-Ho', ''], dtype=object)
array(['Kim', 'Ki-Seok', ''], dtype=object)]
|
3,894 |
2010.08656
|
Hossein Kafiabad
|
Hossein A. Kafiabad and Jacques Vanneste and William R. Young
|
Interaction of near-inertial waves with an anticyclonic vortex
| null | null |
10.1175/JPO-D-20-0257.1
| null |
physics.flu-dyn physics.ao-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Anticyclonic vortices focus and trap near-inertial waves so that
near-inertial energy levels are elevated within the vortex core. Some aspects
of this process, including the nonlinear modification of the vortex by the
wave, are explained by the existence of trapped near-inertial eigenmodes. These
vortex eigenmodes are easily excited by an initial wave with horizontal scale
much larger than that of the vortex radius. We study this process using a
wave-averaged model of near-inertial dynamics and compare its theoretical
predictions with numerical solutions of the three-dimensional Boussinesq
equations. In the linear approximation, the model predicts the eigenmode
frequencies and spatial structures, and a near-inertial wave energy signature
that is characterized by an approximately time-periodic, azimuthally invariant
pattern. The wave-averaged model represents the nonlinear feedback of the waves
on the vortex via a wave-induced contribution to the potential vorticity that
is proportional to the Laplacian of the kinetic energy density of the waves.
When this is taken into account, the modal frequency is predicted to increase
linearly with the energy of the initial excitation. Both linear and nonlinear
predictions agree convincingly with the Boussinesq results.
|
[{'version': 'v1', 'created': 'Fri, 16 Oct 2020 22:38:06 GMT'}]
|
2021-07-14
|
[array(['Kafiabad', 'Hossein A.', ''], dtype=object)
array(['Vanneste', 'Jacques', ''], dtype=object)
array(['Young', 'William R.', ''], dtype=object)]
|
3,895 |
0903.3301
|
Jacopo Bellazzini
|
Jacopo Bellazzini, Claudio Bonanno
|
Nonlinear Schr\"odinger equations with strongly singular potentials
| null | null | null | null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we look for standing waves for nonlinear Schr\"odinger
equations $$ i\frac{\partial \psi}{\partial t}+\Delta \psi - g(|y|) \psi
-W^{\prime}(| \psi |)\frac{\psi}{| \psi |}=0 $$ with cylindrically symmetric
potentials $g$ vanishing at infinity and non-increasing, and a $C^1$ nonlinear
term satisfying weak assumptions. In particular we show the existence of
standing waves with non-vanishing angular momentum with prescribed $L^2$ norm.
The solutions are obtained via a minimization argument, and the proof is given
for an abstract functional which presents lack of compactness. As a particular
case we prove the existence of standing waves with non-vanishing angular
momentum for the nonlinear hydrogen atom equation.
|
[{'version': 'v1', 'created': 'Thu, 19 Mar 2009 10:44:26 GMT'}]
|
2009-03-20
|
[array(['Bellazzini', 'Jacopo', ''], dtype=object)
array(['Bonanno', 'Claudio', ''], dtype=object)]
|
3,896 |
1608.06752
|
Julien Woillez Dr.
|
Julien Woillez, Jaime Alonso, Jean-Philippe Berger, Henri Bonnet,
Willem-Jan de Wit, Sebastian Egner, Frank Eisenhauer, Fr\'ed\'eric Gont\'e,
Sylvain Guieu, Pierre Haguenauer, Antoine M\'erand, Lorenzo Pettazzi,
S\'ebastien Poupar, Markus Sch\"oller, Nicolas Schuhler
|
The 2nd Generation VLTI path to performance
|
9 pages, 6 figures, 1 table, Proc. SPIE 2016
| null |
10.1117/12.2233971
| null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The upgrade of the VLTI infrastructure for the 2nd generation instruments is
now complete with the transformation of the laboratory, and installation of
star separators on both the 1.8-m Auxiliary Telescopes (ATs) and the 8-m Unit
Telescopes (UTs). The Gravity fringe tracker has had a full semester of
commissioning on the ATs, and a first look at the UTs. The CIAO infrared
wavefront sensor is about to demonstrate its performance relative to the
visible wavefront sensor MACAO. First astrometric measurements on the ATs and
astrometric qualification of the UTs are on-going. Now is a good time to
revisit the performance roadmap for VLTI that was initiated in 2014, which
aimed at coherently driving the developments of the interferometer, and
especially its performance, in support to the new generation of instruments:
Gravity and MATISSE.
|
[{'version': 'v1', 'created': 'Wed, 24 Aug 2016 08:41:07 GMT'}]
|
2016-08-25
|
[array(['Woillez', 'Julien', ''], dtype=object)
array(['Alonso', 'Jaime', ''], dtype=object)
array(['Berger', 'Jean-Philippe', ''], dtype=object)
array(['Bonnet', 'Henri', ''], dtype=object)
array(['de Wit', 'Willem-Jan', ''], dtype=object)
array(['Egner', 'Sebastian', ''], dtype=object)
array(['Eisenhauer', 'Frank', ''], dtype=object)
array(['Gonté', 'Frédéric', ''], dtype=object)
array(['Guieu', 'Sylvain', ''], dtype=object)
array(['Haguenauer', 'Pierre', ''], dtype=object)
array(['Mérand', 'Antoine', ''], dtype=object)
array(['Pettazzi', 'Lorenzo', ''], dtype=object)
array(['Poupar', 'Sébastien', ''], dtype=object)
array(['Schöller', 'Markus', ''], dtype=object)
array(['Schuhler', 'Nicolas', ''], dtype=object)]
|
3,897 |
1906.01873
|
Luka Nenadovic
|
Luka Nenadovi\'c, Vladimir Prelovac
|
Towards conceptual generalization in the embedding space
| null | null | null | null |
cs.AI cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Humans are able to conceive physical reality by jointly learning different
facets thereof. To every pair of notions related to a perceived reality may
correspond a mutual relation, which is a notion on its own, but one-level
higher. Thus, we may have a description of perceived reality on at least two
levels and the translation map between them is in general, due to their
different content corpus, one-to-many. Following success of the unsupervised
neural machine translation models, which are essentially one-to-one mappings
trained separately on monolingual corpora, we examine further capabilities of
the unsupervised deep learning methods used there and apply some of these
methods to sets of notions of different level and measure. Using the graph and
word embedding-like techniques, we build one-to-many map without parallel data
in order to establish a unified vector representation of the outer world by
combining notions of different kind into a unique conceptual framework. Due to
their latent similarity, by aligning the two embedding spaces in purely
unsupervised way, one obtains a geometric relation between objects of cognition
on the two levels, making it possible to express a natural knowledge using one
description in the context of the other.
|
[{'version': 'v1', 'created': 'Wed, 5 Jun 2019 08:11:12 GMT'}
{'version': 'v2', 'created': 'Thu, 15 Aug 2019 12:58:36 GMT'}
{'version': 'v3', 'created': 'Fri, 16 Aug 2019 14:24:58 GMT'}]
|
2019-08-19
|
[array(['Nenadović', 'Luka', ''], dtype=object)
array(['Prelovac', 'Vladimir', ''], dtype=object)]
|
3,898 |
0911.2832
|
Cristian Cobeli
|
Cristian Cobeli
|
On a Problem of Mordell with Primitive Roots
|
7 pages, added detailed proof of Lemma 2
| null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the sums of the form $$ S=\sum_{x=1}^{N}
\exp\big((ax+b_1g_1^x+... +b_rg_r^x)/p \big) $$, where $p$ is prime and
$g_1,..., g_r$ are primitive roots $\pmod p$. An almost forty years old problem
of L. J. Mordell asks to find a nontrivial estimate of $S$ when at least two of
the coefficients $b_1,...,b_r$ are not divizible by $p$. Here we obtain a
nontrivial bound of the average of these sums when $g_1$ runs over all
primitive roots $\pmod p$.
|
[{'version': 'v1', 'created': 'Sun, 15 Nov 2009 04:19:43 GMT'}
{'version': 'v2', 'created': 'Wed, 30 Dec 2009 16:18:04 GMT'}]
|
2009-12-30
|
[array(['Cobeli', 'Cristian', ''], dtype=object)]
|
3,899 |
cond-mat/0404189
|
William Gordon Ritter
|
William Gordon Ritter (Harvard University)
|
Asset Pricing and Earnings Fluctuations in a Dynamic Corporate Economy
| null | null | null | null |
cond-mat.other
| null |
We give a new predictive mathematical model for macroeconomics, which deals
specifically with asset prices and earnings fluctuations, in the presence of a
dynamic economy involving mergers, acquisitions, and hostile takeovers.
Consider a model economy with a large number of corporations $C_1, C_2, ...,
C_n$ of different sizes. We ascribe a degree of randomness to the event that
any particular pair of corporations $C_i, C_j$ might undergo a merger, with
probability matrix $p_{ij}$. Previous random-graph models set $p_{ij}$ equal to
a constant, while in a real-world economy, $p_{ij}$ is a complicated function
of a large number of variables. We combine techniques of artificial
intelligence and statistical physics to define a general class of mathematical
models which, after being trained with past market data, give numerical
predictions for certain quantities of interest including asset prices, earnings
fluctuations, and merger/acquisition likelihood. These new models might
reasonably be called ``cluster-size models.'' They partially capture the
complicated dependence of $p_{ij}$ on economic factors, and generate usable
predictions.
|
[{'version': 'v1', 'created': 'Wed, 7 Apr 2004 22:48:13 GMT'}]
|
2007-05-23
|
[array(['Ritter', 'William Gordon', '', 'Harvard University'], dtype=object)]
|
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