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|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
16,400 |
2304.06719
|
Shaoyuan Xie
|
Shaoyuan Xie, Lingdong Kong, Wenwei Zhang, Jiawei Ren, Liang Pan, Kai
Chen, Ziwei Liu
|
RoboBEV: Towards Robust Bird's Eye View Perception under Corruptions
|
Preprint; 27 pages, 18 figures, 33 tables; Code at
https://github.com/Daniel-xsy/RoboBEV
| null | null | null |
cs.CV cs.RO
|
http://creativecommons.org/licenses/by-sa/4.0/
|
The recent advances in camera-based bird's eye view (BEV) representation
exhibit great potential for in-vehicle 3D perception. Despite the substantial
progress achieved on standard benchmarks, the robustness of BEV algorithms has
not been thoroughly examined, which is critical for safe operations. To bridge
this gap, we introduce RoboBEV, a comprehensive benchmark suite that
encompasses eight distinct corruptions, including Bright, Dark, Fog, Snow,
Motion Blur, Color Quant, Camera Crash, and Frame Lost. Based on it, we
undertake extensive evaluations across a wide range of BEV-based models to
understand their resilience and reliability. Our findings indicate a strong
correlation between absolute performance on in-distribution and
out-of-distribution datasets. Nonetheless, there are considerable variations in
relative performance across different approaches. Our experiments further
demonstrate that pre-training and depth-free BEV transformation has the
potential to enhance out-of-distribution robustness. Additionally, utilizing
long and rich temporal information largely helps with robustness. Our findings
provide valuable insights for designing future BEV models that can achieve both
accuracy and robustness in real-world deployments.
|
[{'version': 'v1', 'created': 'Thu, 13 Apr 2023 17:59:46 GMT'}]
|
2023-04-14
|
[array(['Xie', 'Shaoyuan', ''], dtype=object)
array(['Kong', 'Lingdong', ''], dtype=object)
array(['Zhang', 'Wenwei', ''], dtype=object)
array(['Ren', 'Jiawei', ''], dtype=object)
array(['Pan', 'Liang', ''], dtype=object)
array(['Chen', 'Kai', ''], dtype=object)
array(['Liu', 'Ziwei', ''], dtype=object)]
|
16,401 |
1208.5764
|
S. K. Pandey
|
S. K. Pandey
|
Electronic Spin: Abstract Mathematical or Real Physical Phenomenon
|
7 pages
| null | null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the description of electron spin obtained through the conventional
Copenhagen interpretation of quantum mechanics, the concrete picture of
rotation was replaced by an abstract mathematical representation; visualization
or visualisability was entirely lost. The work described here takes a step
towards restoring this.
|
[{'version': 'v1', 'created': 'Sun, 26 Aug 2012 04:37:06 GMT'}
{'version': 'v2', 'created': 'Thu, 28 Feb 2013 18:02:14 GMT'}
{'version': 'v3', 'created': 'Mon, 4 Mar 2013 12:50:22 GMT'}
{'version': 'v4', 'created': 'Sat, 1 Nov 2014 13:31:14 GMT'}]
|
2014-11-04
|
[array(['Pandey', 'S. K.', ''], dtype=object)]
|
16,402 |
2102.12084
|
Ashok Singal
|
Ashok K. Singal
|
Our Peculiar Motion Inferred from Number Counts of Mid Infra Red AGNs
and the Discordance Seen with the Cosmological Principle
|
18 pages, 10 figures, 3 tables, accepted in Universe
|
Universe 7, 107 (2021)
|
10.3390/universe7040107
| null |
astro-ph.CO
|
http://creativecommons.org/licenses/by/4.0/
|
The dipole anisotropy in the Cosmic Microwave Background Radiation (CMBR) has
given a peculiar velocity vector 370 km s$^{-1}$ along
$l=264^\circ,b=48^\circ$. However, some other dipoles, for instance, from the
number counts, sky brightness or redshift distributions in large samples of
distant Active Galactic Nuclei (AGNs), have yielded values of the peculiar
velocity many times larger than that from the CMBR, though surprisingly, in all
cases the directions agreed with the CMBR dipole. Here we determine our
peculiar motion from a sample of ~0.28 million AGNs, selected from the Mid
Infra Red Active Galactic Nuclei (MIRAGN) sample comprising more than a million
sources. From this, we find a peculiar velocity, which is more than four times
the CMBR value, although the direction seems to be within $\sim 2\sigma$ of the
CMBR dipole. A genuine value of the solar peculiar velocity should be the same
irrespective of the data or the technique employed to estimate it. Therefore,
such discordant dipole amplitudes, might mean that the explanation for these
dipoles, including that of the CMBR, might in fact be something else. But, the
observed fact that the direction in all cases, is the same, though obtained
from completely independent surveys using different instruments and techniques,
by different sets of people employing different computing routines, might
nonetheless indicate that these dipoles are not merely due to some systematics,
otherwise why would they all be pointing along the same direction. It might
instead suggest a preferred direction in the Universe, implying a genuine
anisotropy, which would violate the Cosmological Principle, the core of the
modern cosmology.
|
[{'version': 'v1', 'created': 'Wed, 24 Feb 2021 06:14:22 GMT'}
{'version': 'v2', 'created': 'Tue, 23 Mar 2021 01:41:17 GMT'}
{'version': 'v3', 'created': 'Thu, 15 Apr 2021 12:40:25 GMT'}]
|
2023-01-04
|
[array(['Singal', 'Ashok K.', ''], dtype=object)]
|
16,403 |
1807.00434
|
Federico Di Gioia
|
Federico Di Gioia and Giovanni Montani
|
Linear perturbations of an anisotropic Bianchi I model with a uniform
magnetic field
|
Small modifications. Final version, published by EPJC
|
Eur. Phys. J. C (2019) 79: 921
|
10.1140/epjc/s10052-019-7411-2
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we study the effect of a magnetic field on the growth of
cosmological perturbations. We develop a mathematical consistent treatment in
which a perfect fluid and a uniform magnetic field evolve together in a Bianchi
I universe. We then study the energy density perturbations on this background
with particular emphasis on the effect of the background magnetic field. We
develop a full relativistic solution which refines previous analysis in the
relativistic limit, recovers the known ones in the Newtonian treatment with
adiabatic sound speed, and it adds anisotropic effects to the relativistic ones
for perturbations with wavelength within the Hubble horizon. This represents a
refined approach on the perturbation theory of an isotropic universe in GR,
since most of the present studies deal with fully isotropic systems.
|
[{'version': 'v1', 'created': 'Mon, 2 Jul 2018 02:11:12 GMT'}
{'version': 'v2', 'created': 'Thu, 12 Jul 2018 12:30:48 GMT'}
{'version': 'v3', 'created': 'Wed, 26 Jun 2019 15:35:54 GMT'}
{'version': 'v4', 'created': 'Sun, 17 Nov 2019 15:16:36 GMT'}]
|
2019-11-19
|
[array(['Di Gioia', 'Federico', ''], dtype=object)
array(['Montani', 'Giovanni', ''], dtype=object)]
|
16,404 |
1506.04504
|
Chris Jeavons
|
Neal Bez, Chris Jeavons, Tohru Ozawa
|
Some sharp bilinear space-time estimates for the wave equation
|
18 pages
|
Mathematika 62 (2016) 719-737
|
10.1112/S0025579316000012
| null |
math.AP math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove a family of sharp bilinear space-time estimates for the half-wave
propagator. As a consequence, for radially symmetric initial data, we establish
sharp estimates of this kind for a range of exponents beyond the classical
range.
|
[{'version': 'v1', 'created': 'Mon, 15 Jun 2015 08:04:03 GMT'}]
|
2016-03-16
|
[array(['Bez', 'Neal', ''], dtype=object)
array(['Jeavons', 'Chris', ''], dtype=object)
array(['Ozawa', 'Tohru', ''], dtype=object)]
|
16,405 |
2306.16426
|
Mostafa Bousder Dr.
|
M. Bousder, E. Salmani, and H. Ez-Zahraouy
|
Entropy as logarithmic term of the central charge and modified Friedmann
equation in AdS/CFT correspondence
|
22 pages, 4 figures
|
Volume 38, June 2023, Pages 49-57
|
10.1016/j.jheap.2023.04.002
| null |
gr-qc hep-th
|
http://creativecommons.org/licenses/by/4.0/
|
This paper is about the extended thermodynamics of AdS black holes and its
relation to CFT thermodynamics. The logarithmic term of the central charge is
interpreted as black hole entropy. We have obtain a modified Friedmann equation
from the Smarr formula. We find that the AdS radius is the critical shadow
radius. We obtain the Hawking-Bekenstein formula with logarithmic corrections,
which depends on the central charge. The real gas in AdS is a dual of an ideal
gas in CFT. This work can be extended to the AdS-Kerr black holes.
|
[{'version': 'v1', 'created': 'Mon, 26 Jun 2023 11:14:34 GMT'}]
|
2023-06-30
|
[array(['Bousder', 'M.', ''], dtype=object)
array(['Salmani', 'E.', ''], dtype=object)
array(['Ez-Zahraouy', 'H.', ''], dtype=object)]
|
16,406 |
1307.3926
|
Christophe Garban
|
Federico Camia and Christophe Garban and Charles M. Newman
|
Planar Ising magnetization field II. Properties of the critical and
near-critical scaling limits
|
18 pages, 1 figure
| null | null | null |
math.PR math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In [CGN12], we proved that the renormalized critical Ising magnetization
fields $\Phi^a:= a^{15/8} \sum_{x\in a\, \Z^2} \sigma_x \, \delta_x$ converge
as $a\to 0$ to a random distribution that we denoted by $\Phi^\infty$. The
purpose of this paper is to establish some fundamental properties satisfied by
this $\Phi^\infty$ and the near-critical fields $\Phi^{\infty,h}$. More
precisely, we obtain the following results. \bi [(i)] If $A\subset \C$ is a
smooth bounded domain and if $m=m_A := <{\Phi^\infty, 1_A}$ denotes the
limiting rescaled magnetization in $A$, then there is a constant $c=c_A>0$ such
that {equation*} \log \Pb{m > x} \underset{x\to \infty}{\sim} -c \;
x^{16}\,.{equation*} In particular, this provides an alternative proof that the
field $\Phi^\infty$ is non-Gaussian (another proof of this fact would use the
$n$-point correlation functions established in \cite{CHI} which do not satisfy
Wick's formula). [(ii)] The random variable $m=m_A$ has a smooth {\it density}
and one has more precisely the following bound on its Fourier transform:
$|\Eb{e^{i\,t m}} |\le e^{- \tilde{c}\, |t|^{16/15}}$. [(iii)] There exists a
one-parameter family $\Phi^{\infty,h}$ of near-critical scaling limits for the
magnetization field in the plane with vanishingly small external magnetic
field. \ei
|
[{'version': 'v1', 'created': 'Mon, 15 Jul 2013 13:17:08 GMT'}]
|
2013-07-16
|
[array(['Camia', 'Federico', ''], dtype=object)
array(['Garban', 'Christophe', ''], dtype=object)
array(['Newman', 'Charles M.', ''], dtype=object)]
|
16,407 |
hep-th/0307206
|
Norisuke Sakai
|
Minoru Eto, Nobuhito Maru and Norisuke Sakai
|
Stability and Fluctuations on Walls in N=1 Supergravity
|
30 pages, 7 figures
|
Nucl.Phys. B673 (2003) 98-130
|
10.1016/j.nuclphysb.2003.09.025
|
TIT/HEP-499
|
hep-th
| null |
The recently found non-BPS multi-wall configurations in the N=1 supergravity
in four dimensions is shown to have no tachyonic scalar fluctuations without
additional stabilization mechanisms. Mass of radion (lightest massive
fluctuation) is found to be proportional to $Lambda {\rm e}^{-\pi\Lambda R/2}$,
where $\Lambda $ is the inverse width of the wall and $ R$ is the radius of
compactified dimension. We obtain localized massless graviton and gravitino
forming a supermultiplet with respect to the Killing spinor. The relation
between the bulk energy density and the boundary energy density (cosmological
constants) is an automatic consequence of the field equation and Einstein
equation. In the limit of vanishing gravitational coupling, the Nambu-Goldstone
modes are reproduced.
|
[{'version': 'v1', 'created': 'Tue, 22 Jul 2003 05:05:12 GMT'}]
|
2010-04-05
|
[array(['Eto', 'Minoru', ''], dtype=object)
array(['Maru', 'Nobuhito', ''], dtype=object)
array(['Sakai', 'Norisuke', ''], dtype=object)]
|
16,408 |
1804.02442
|
Brendan Colvert
|
Brendan Colvert and Eva Kanso
|
A Local Sensory and Control Strategy for Following Hydrodynamic Signals
| null | null | null | null |
math.OC math.DS physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Many aquatic organisms are able to track ambient flow disturbances and locate
their source. These tasks are particularly challenging because they require the
organism to sense local flow information and respond accordingly. Details of
how these capabilities emerge from the interplay between neural control and
mechano-sensory modalities remain elusive. Inspired by these organisms, we
develop a mathematical model of a mobile sensor designed to find the source of
a periodic flow disturbance. The sensor locally extracts the direction of
propagation of the flow signal and adjusts its heading accordingly. We show, in
a simplified flow field and under certain conditions on the controller, that
the mobile sensor converges unconditionally to the source of the flow field.
Then, through carefully-conducted numerical simulations of flow past an
oscillating airfoil, we assess the behavior of the mobile sensor in complex
flows and demonstrate its efficacy in tracking the flow signal and locating the
airfoil. The proposed sensory and control strategy is relevant to the design of
bio-inspired underwater robots, but the general idea of orienting opposite to
the direction of information propagation can be applied more broadly in optimal
sensor placements and climate models.
|
[{'version': 'v1', 'created': 'Fri, 6 Apr 2018 20:04:18 GMT'}]
|
2018-04-10
|
[array(['Colvert', 'Brendan', ''], dtype=object)
array(['Kanso', 'Eva', ''], dtype=object)]
|
16,409 |
2211.16996
|
Da-Ming Yang
|
Da-Ming Yang, Jan-Torge Schindler, Riccardo Nanni, Joseph F. Hennawi,
Eduardo Ba\~nados, Xiaohui Fan, Anniek Gloudemans, Huub Rottgering, Feige
Wang, Jinyi Yang
|
High-$z$ Quasar Candidate Archive: A Spectroscopic Catalog of Quasars
and Contaminants in Various Quasar Searches
|
28 pages, 26 figures, 4 tables
| null | null | null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the high-$z$ quasar candidate archive (HzQCA), summarizing the
spectroscopic observations of 174 $z\gtrsim5$ quasar candidates using
Keck/LRIS, Keck/MOSFIRE, and Keck/NIRES. We identify 7 candidates as $z\sim 6$
quasars 3 of them newly reported here, and 51 candidates as brown dwarfs. In
the remaining sources, 74 candidates are unlikely to be quasars; 2 sources are
inconclusive; the others could not be fully reduced or extracted. Based on the
classifications we investigate the distributions of quasars and contaminants in
color space with photometry measurements from DELS ($z$), VIKING/UKIDSS
($YJHK_s$/$YJHK$), and un\textit{WISE} ($W1W2$). We find that the identified
brown dwarfs are not fully consistent with the empirical brown dwarf model that
is commonly used in quasar candidate selection methods. To refine spectroscopic
confirmation strategies, we simulate synthetic spectroscopy of high-$z$ quasars
and contaminants for all three instruments. The simulations utilize the
spectroscopic data in HzQCA. We predict the required exposure times for quasar
confirmation and propose and optimal strategy for spectroscopic follow-up
observations. For example, we demonstrate that we can identify a $m_J=21.5$ at
$z=7.6$ or a $m_J=23.0$ at $z=7.0$ within 15\,min of exposure time with LRIS.
With the publication of the HzQCA we aim to provide guidance for future quasar
surveys and candidate classification.
|
[{'version': 'v1', 'created': 'Wed, 30 Nov 2022 13:52:12 GMT'}]
|
2022-12-01
|
[array(['Yang', 'Da-Ming', ''], dtype=object)
array(['Schindler', 'Jan-Torge', ''], dtype=object)
array(['Nanni', 'Riccardo', ''], dtype=object)
array(['Hennawi', 'Joseph F.', ''], dtype=object)
array(['Bañados', 'Eduardo', ''], dtype=object)
array(['Fan', 'Xiaohui', ''], dtype=object)
array(['Gloudemans', 'Anniek', ''], dtype=object)
array(['Rottgering', 'Huub', ''], dtype=object)
array(['Wang', 'Feige', ''], dtype=object)
array(['Yang', 'Jinyi', ''], dtype=object)]
|
16,410 |
2103.17257
|
Saeed Lotfifard Dr.
|
Saeed Lotfifard
|
Teaching Electrical Model of Power Transformers to Undergraduate
Students: Magnetic Circuit Approach
| null | null | null | null |
physics.ed-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper explains a unified approach for teaching the electrical model of
power transformers to undergraduate students using magnetic circuits. The
commonly used approach for explaining the electrical model of power
transformers is a hybrid approach in which magnetic circuits are used to
explain the presence of series inductances. However, the presence of shunt
inductance and resistance in the model is explained using alternative
approaches. In contrary, this paper explains how both series and shunt elements
can be described by using magnetic circuits. Moreover, three real-world
examples and Matlab/Simulink results are provided to demonstrate how the
presented explanations can be used to describe the responses of power
transformers in real-world applications.
|
[{'version': 'v1', 'created': 'Mon, 29 Mar 2021 23:48:09 GMT'}]
|
2021-04-01
|
[array(['Lotfifard', 'Saeed', ''], dtype=object)]
|
16,411 |
2003.08256
|
Dongjae Lee
|
Dongjae Lee, Hoseong Seo, Dabin Kim, and H. Jin Kim
|
Aerial Manipulation using Model Predictive Control for Opening a Hinged
Door
|
to be presented in 2020 IEEE International Conference on Robotics and
Automation (ICRA), Paris, France, 2020
| null | null | null |
cs.RO cs.SY eess.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Existing studies for environment interaction with an aerial robot have been
focused on interaction with static surroundings. However, to fully explore the
concept of an aerial manipulation, interaction with moving structures should
also be considered. In this paper, a multirotor-based aerial manipulator
opening a daily-life moving structure, a hinged door, is presented. In order to
address the constrained motion of the structure and to avoid collisions during
operation, model predictive control (MPC) is applied to the derived coupled
system dynamics between the aerial manipulator and the door involving state
constraints. By implementing a constrained version of differential dynamic
programming (DDP), MPC can generate position setpoints to the disturbance
observer (DOB)-based robust controller in real-time, which is validated by our
experimental results.
|
[{'version': 'v1', 'created': 'Wed, 18 Mar 2020 14:56:06 GMT'}]
|
2020-03-19
|
[array(['Lee', 'Dongjae', ''], dtype=object)
array(['Seo', 'Hoseong', ''], dtype=object)
array(['Kim', 'Dabin', ''], dtype=object)
array(['Kim', 'H. Jin', ''], dtype=object)]
|
16,412 |
2303.05015
|
Jieren Deng
|
Jieren Deng, Xin Zhou, Hao Tian, Zhihong Pan, Derek Aguiar
|
Smooth and Stepwise Self-Distillation for Object Detection
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Distilling the structured information captured in feature maps has
contributed to improved results for object detection tasks, but requires
careful selection of baseline architectures and substantial pre-training.
Self-distillation addresses these limitations and has recently achieved
state-of-the-art performance for object detection despite making several
simplifying architectural assumptions. Building on this work, we propose Smooth
and Stepwise Self-Distillation (SSSD) for object detection. Our SSSD
architecture forms an implicit teacher from object labels and a feature pyramid
network backbone to distill label-annotated feature maps using Jensen-Shannon
distance, which is smoother than distillation losses used in prior work. We
additionally add a distillation coefficient that is adaptively configured based
on the learning rate. We extensively benchmark SSSD against a baseline and two
state-of-the-art object detector architectures on the COCO dataset by varying
the coefficients and backbone and detector networks. We demonstrate that SSSD
achieves higher average precision in most experimental settings, is robust to a
wide range of coefficients, and benefits from our stepwise distillation
procedure.
|
[{'version': 'v1', 'created': 'Thu, 9 Mar 2023 03:33:56 GMT'}]
|
2023-03-10
|
[array(['Deng', 'Jieren', ''], dtype=object)
array(['Zhou', 'Xin', ''], dtype=object)
array(['Tian', 'Hao', ''], dtype=object)
array(['Pan', 'Zhihong', ''], dtype=object)
array(['Aguiar', 'Derek', ''], dtype=object)]
|
16,413 |
1609.05782
|
Ronald C. Arkin
|
Ronald C. Arkin and Gaurav S. Sukhatme
|
Toward a Science of Autonomy for Physical Systems: Defense
|
A Computing Community Consortium (CCC) white paper, 4 pages
| null | null | null |
cs.CY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Militaries around the world have long been cognizant of the potential
benefits associated with autonomous systems both in the conduct of warfare and
in its prevention. This has lead to the declaration by some that this
technology will lead to a fundamental change in the ways in which war is
conducted, i.e., a revolution in military affairs (RMA) not unlike gunpowder,
the long bow, the rifled bullet, the aircraft carrier, etc. Indeed the United
States has created roadmaps for robotics with ever-increasing autonomous
capability that span almost 40 years. These systems span air, sea, sea surface,
littoral, ground and subterranean environments. There are serious societal and
ethical concerns associated with the deployment of this technology that remain
unaddressed. How can sufficient protection be afforded noncombatants? What
about civilian blowback, where this technology may end up being used in
policing operations against domestic groups? How can we protect the fundamental
human rights of all involved? Considerable discussion is being conducted at an
international level, including at the United Nations Convention on Certain
Conventional Weapons (CCW) over the past two years, debating if and how such
systems, particularly lethal platforms should be banned or regulated.
|
[{'version': 'v1', 'created': 'Mon, 19 Sep 2016 15:30:09 GMT'}]
|
2016-09-20
|
[array(['Arkin', 'Ronald C.', ''], dtype=object)
array(['Sukhatme', 'Gaurav S.', ''], dtype=object)]
|
16,414 |
1011.4309
|
Marina Rejkuba
|
M. Rejkuba (1), W. E. Harris (2), L. Greggio (3), G. L. H. Harris (4)
((1) ESO, Germany, (2) McMaster University, Canada, (3) Padova Observatory,
Italy, Waterloo University, Canada)
|
How old are the stars in the halo of NGC 5128 (Centaurus A)?
|
36 pages, 14 figures, accepted for publication in A&A
| null |
10.1051/0004-6361/201015640
| null |
astro-ph.CO astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
NGC 5128 (Centaurus A) is, at the distance of just 3.8 Mpc, the nearest
easily observable giant elliptical galaxy. Therefore it is the best target to
investigate the early star formation history of an elliptical galaxy. Our aims
are to establish when the oldest stars formed in NGC 5128, and whether this
galaxy formed stars over a long period. We compare simulated colour-magnitude
diagrams with the deep ACS/HST photometry. We find that that the observed
colour-magnitude diagram can be reproduced satisfactorily only by simulations
that have the bulk of the stars with ages in excess of ~10 Gyr, and that the
alpha-enhanced models fit the data much better than the solar scaled ones. Data
are not consistent with extended star formation over more than 3-4 Gyr. Two
burst models, with 70-80% of the stars formed 12+/-1 Gyr ago and with 20-30%
younger contribution with 2-4 Gyr old stars provide the best agreement with the
data. The old component spans the whole metallicity range of the models
(Z=0.0001-0.04), while for the young component the best fitting models indicate
higher minimum metallicity (~1/10 - 1/4 Z_sun). The bulk of the halo stars in
NGC5128 must have formed at redshift z>=2 and the chemical enrichment was very
fast, reaching solar or even twice-solar metallicity already for the ~11-12 Gyr
old population. The minor young component, adding ~20-30% of the stars to the
halo, and contributing less than 10% of the mass, may have resulted from a
later star formation event ~2-4 Gyr ago. (abridged)
|
[{'version': 'v1', 'created': 'Thu, 18 Nov 2010 21:23:46 GMT'}]
|
2015-05-20
|
[array(['Rejkuba', 'M.', ''], dtype=object)
array(['Harris', 'W. E.', ''], dtype=object)
array(['Greggio', 'L.', ''], dtype=object)
array(['Harris', 'G. L. H.', ''], dtype=object)]
|
16,415 |
cond-mat/0005432
|
Roland Faller
|
Roland Faller, Florian M\"uller-Plathe, and Andreas Heuer
|
Local Reorientation Dynamics of Semiflexible Polymers in the Melt
|
29 pages, several figures, accepted by Macromolecules
|
Macromolecules 33(17) 6602-6610 (2000)
|
10.1021/ma000058y
| null |
cond-mat.soft
| null |
The reorientation dynamics of local tangent vectors of chains in isotropic
amorphous melts containing semiflexible model polymers was studied by molecular
dynamics simulations. The reorientation is strongly influenced both by the
local chain stiffness and by the overall chain length. It takes place by two
different subsequent processes: A short-time non-exponential decay and a
long-time exponential reorientation arising from the relaxation of medium-size
chain segments. Both processes depend on stiffness and chain length. The strong
influence of the chain length on the chain dynamics is in marked contrast to
its negligible effect on the static structure of the melt. The local structure
shows only a small dependence on the stiffness, and is independent of chain
length. Calculated correlation functions related to double-quantum NMR
experiments are in qualitative agreement with experiments on entangled melts. A
plateau is observed in the dependence of segment reorientation on the
mean-squared displacement of the corresponding chain segments. This plateau
confirms, on one hand, the existence of reptation dynamics. On the other hand,
it shows how the reptation picture has to be adapted if, instead of fully
flexible chains, semirigid chains are considered.
|
[{'version': 'v1', 'created': 'Thu, 25 May 2000 07:44:02 GMT'}]
|
2016-08-15
|
[array(['Faller', 'Roland', ''], dtype=object)
array(['Müller-Plathe', 'Florian', ''], dtype=object)
array(['Heuer', 'Andreas', ''], dtype=object)]
|
16,416 |
hep-ph/9809237
|
Julian Manzano
|
Emili Bagan, Domenec Espriu, Julian Manzano
|
The Effective Electroweak Chiral Lagrangian: The Matter Sector
|
Latex, 45 pages, 8 eps figures. Sections 5, 6 and 9 have been
rewritten to clarify the contents. Some mistakes and typos have been
corrected. Two references have been added. Figures 7 and 8 have been modified
|
Phys. Rev. D 60, 114035 (1999)
|
10.1103/PhysRevD.60.114035
|
UB-ECM-PF 98/17
|
hep-ph
| null |
We parametrize in a model-independent way possible departures from the
minimal Standard Model predictions in the matter sector. We only assume the
symmetry breaking pattern of the Standard Model and that new particles are
sufficiently heavy so that the symmetry is non-linearly realized. Models with
dynamical symmetry breaking are generically of this type. We review in the
effective theory language to what extent the simplest models of dynamical
breaking are actually constrained and the assumptions going into the comparison
with experiment. Dynamical symmetry breaking models can be approximated at
intermediate energies by four-fermion operators. We present a complete
classification of the latter when new particles appear in the usual
representations of the $SU(2)_L\times SU(3)_c$ group as well as a partial
classification in the general case. We discuss the accuracy of the four-fermion
description by matching to a simple `fundamental' theory. The coefficients of
the effective lagrangian in the matter sector for dynamical symmetry breaking
models (expressed in terms of the coefficients of the four-quark operators) are
then compared to those of models with elementary scalars (such as the minimal
Standard Model). Contrary to a somewhat widespread belief, we see that the sign
of the vertex corrections is not fixed in dynamical symmetry breaking models.
This work provides the theoretical tools required to analyze, in a rather
general setting, constraints on the matter sector of the Standard Model.
|
[{'version': 'v1', 'created': 'Wed, 2 Sep 1998 14:48:26 GMT'}
{'version': 'v2', 'created': 'Mon, 28 Dec 1998 14:55:11 GMT'}
{'version': 'v3', 'created': 'Fri, 16 Apr 1999 13:08:10 GMT'}]
|
2016-08-25
|
[array(['Bagan', 'Emili', ''], dtype=object)
array(['Espriu', 'Domenec', ''], dtype=object)
array(['Manzano', 'Julian', ''], dtype=object)]
|
16,417 |
1602.04089
|
Kirsti Wash
|
Douglas F. Rall and Kirsti Wash
|
On minimum identifying codes in some Cartesian product graphs
| null | null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An identifying code in a graph is a dominating set that also has the property
that the closed neighborhood of each vertex in the graph has a distinct
intersection with the set. The minimum cardinality of an identifying code, or
ID code, in a graph $G$ is called the ID code number of $G$ and is denoted
$\gid(G)$. In this paper, we give upper and lower bounds for the ID code number
of the prism of a graph, or $G\Box K_2$. In particular, we show that $\gid(G
\Box K_2) \ge \gid(G)$ and we show that this bound is sharp. We also give upper
and lower bounds for the ID code number of grid graphs and a general upper
bound for $\gid(G\Box K_2)$.
|
[{'version': 'v1', 'created': 'Fri, 12 Feb 2016 15:55:08 GMT'}]
|
2016-02-15
|
[array(['Rall', 'Douglas F.', ''], dtype=object)
array(['Wash', 'Kirsti', ''], dtype=object)]
|
16,418 |
0803.1959
|
Katya Georgieva
|
Katya Georgieva and Boian Kirov
|
Does human activity widen the tropics?
|
2 pages, 1 figure
| null | null | null |
physics.space-ph physics.ao-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The progress article - Widening of the tropical belt in a changing climate -
by Seidel et al. (2008) published in the first issue of Nature Geosciences,
summarizes the results of several methods to determine the width of the
tropical zone. All they show evidence that the tropics have been expanding over
the past few decades. We confirm this widening based on one more indicator -
the position of the subtropical centers of high pressure. However, we question
the implication of the authors that the tropics widen in response to human
activity, and suggest as a more probable cause the increasing solar activity.
Consequently, we question their conclusion that this widening may continue into
the future in association with anthropogenic climate change, and suggest that
whether the tropics will continue widening will depend on the future evolution
of solar activity rather than on anthropogenic activity.
|
[{'version': 'v1', 'created': 'Thu, 13 Mar 2008 16:31:52 GMT'}]
|
2008-03-14
|
[array(['Georgieva', 'Katya', ''], dtype=object)
array(['Kirov', 'Boian', ''], dtype=object)]
|
16,419 |
hep-th/9503232
|
Sergei Ketov
|
Sergei Ketov and Olaf Lechtenfeld (ITP, University of Hanover)
|
The String Measure and Spectral Flow of Critical N=2 Strings
|
14 pages, LaTeX, macros included
|
Phys.Lett. B353 (1995) 463-470
|
10.1016/0370-2693(95)00612-O
|
ITP-UH-13/95
|
hep-th
| null |
The general structure of N=2 moduli space at arbitrary genus and instanton
number is investigated. The N=2 NSR string measure is calculated, yielding
picture- and U(1) ghost number-changing operator insertions. An explicit
formula for the spectral flow operator acting on vertex operators is given, and
its effect on N=2 string amplitudes is discussed.
|
[{'version': 'v1', 'created': 'Sat, 1 Apr 1995 11:13:49 GMT'}]
|
2009-10-28
|
[array(['Ketov', 'Sergei', '', 'ITP, University of Hanover'], dtype=object)
array(['Lechtenfeld', 'Olaf', '', 'ITP, University of Hanover'],
dtype=object) ]
|
16,420 |
2210.02198
|
Emily C Hector
|
Emily C. Hector
|
Fused mean structure learning in data integration with dependence
|
28 pages, 4 figures
| null | null | null |
stat.ME stat.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Motivated by image-on-scalar regression with data aggregated across multiple
sites, we consider a setting in which multiple independent studies each collect
multiple dependent vector outcomes, with potential mean model parameter
homogeneity between studies and outcome vectors. To determine the validity of
jointly analyzing these data sources, we must learn which of these data sources
share mean model parameters. We propose a new model fusion approach that
delivers improved flexibility, statistical performance and computational speed
over existing methods. Our proposed approach specifies a quadratic inference
function within each data source and fuses mean model parameter vectors in
their entirety based on a new formulation of a pairwise fusion penalty. We
establish theoretical properties of our estimator and propose an asymptotically
equivalent weighted oracle meta-estimator that is more computationally
efficient. Simulations and application to the ABIDE neuroimaging consortium
highlight the flexibility of the proposed approach. An R package is provided
for ease of implementation.
|
[{'version': 'v1', 'created': 'Wed, 5 Oct 2022 12:24:35 GMT'}]
|
2022-10-06
|
[array(['Hector', 'Emily C.', ''], dtype=object)]
|
16,421 |
2206.10650
|
Arghyajit Datta
|
Arghyajit Datta, Rishav Roshan, Arunansu Sil
|
Effects of Reheating on Charged Lepton Yukawa Equilibration and
Leptogenesis
|
5 pages, 4 figures
| null | null | null |
hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
We show that the process of non-instantaneous reheating during the
post-inflationary period can have a sizable impact on the charged lepton
equilibration temperature in the early Universe. This suggests relooking the
effects of lepton flavors in the leptogenesis scenario where the production and
decay of right-handed neutrinos take place within this prolonged era of
reheating. We find this observation has the potential to shift the flavor
regime(s) of leptogenesis compared to the standard radiation-dominated era.
|
[{'version': 'v1', 'created': 'Tue, 21 Jun 2022 18:03:05 GMT'}]
|
2022-06-23
|
[array(['Datta', 'Arghyajit', ''], dtype=object)
array(['Roshan', 'Rishav', ''], dtype=object)
array(['Sil', 'Arunansu', ''], dtype=object)]
|
16,422 |
cond-mat/0603360
|
Hidetsugu Sakaguchi
|
Hidetsugu Sakaguchi
|
Reaction-Diffusion System in a Vesicle with Semi-Permeable Membrane
|
8 pages, 6 figures
| null |
10.1143/JPSJ.75.054004
| null |
cond-mat.stat-mech cond-mat.soft
| null |
We study the Schloegl model in a vesicle with semi-permeable membrane. The
diffusion constant takes a smaller value in the membrane region, which prevents
the outflow of self-catalytic product. A nonequilibrium state is stably
maintained inside of the vesicle. Nutrients are absorbed and waste materials
are exhausted through the membrane by diffusion. It is interpreted as a model
of primitive metabolism in a cell.
|
[{'version': 'v1', 'created': 'Tue, 14 Mar 2006 03:32:51 GMT'}]
|
2009-11-11
|
[array(['Sakaguchi', 'Hidetsugu', ''], dtype=object)]
|
16,423 |
2107.11609
|
Umberto Michelucci
|
Umberto Michelucci, Michela Sperti, Dario Piga, Francesca Venturini,
Marco A. Deriu
|
A Model-Agnostic Algorithm for Bayes Error Determination in Binary
Classification
|
21 pages
| null | null | null |
cs.LG cs.AI stat.ML
|
http://creativecommons.org/licenses/by/4.0/
|
This paper presents the intrinsic limit determination algorithm (ILD
Algorithm), a novel technique to determine the best possible performance,
measured in terms of the AUC (area under the ROC curve) and accuracy, that can
be obtained from a specific dataset in a binary classification problem with
categorical features {\sl regardless} of the model used. This limit, namely the
Bayes error, is completely independent of any model used and describes an
intrinsic property of the dataset. The ILD algorithm thus provides important
information regarding the prediction limits of any binary classification
algorithm when applied to the considered dataset. In this paper the algorithm
is described in detail, its entire mathematical framework is presented and the
pseudocode is given to facilitate its implementation. Finally, an example with
a real dataset is given.
|
[{'version': 'v1', 'created': 'Sat, 24 Jul 2021 13:55:31 GMT'}]
|
2021-07-27
|
[array(['Michelucci', 'Umberto', ''], dtype=object)
array(['Sperti', 'Michela', ''], dtype=object)
array(['Piga', 'Dario', ''], dtype=object)
array(['Venturini', 'Francesca', ''], dtype=object)
array(['Deriu', 'Marco A.', ''], dtype=object)]
|
16,424 |
2210.11422
|
Junquan Deng
|
Junquan Deng
|
A Hybrid Millimeter-wave Channel Simulator for Joint Communication and
Localization
|
6 pages,8 figures,submitted to ICCC 2022
| null | null | null |
eess.SP
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Joint communication and localization~(JCL) is envisioned to be a key feature
in future millimeter-wave~(mmWave) wireless networks for context-aware
applications. A map-based channel model considering both site-specific radio
environment and statistical channel characteristics is essential to facilitate
JCL research and to evaluate the performance of various JCL systems. To this
end, this paper presents an open-source hybrid mmWave channel simulator called
OmniSIM for site-specific JCL research, which uses digital map, network layout
and user trajectories as inputs to predict the channel responses between users
and base stations. A fast shooting-bouncing rays~(FSBR) algorithm combined with
Computational Electromagnetic, has been developed to generate channel
parameters relevant to JCL, considering mmWave reflection, diffusing,
diffraction and scattering.
|
[{'version': 'v1', 'created': 'Tue, 4 Oct 2022 18:25:11 GMT'}]
|
2022-10-21
|
[array(['Deng', 'Junquan', ''], dtype=object)]
|
16,425 |
2208.12483
|
Peng Zhao
|
Peng Zhao and Long-Fei Li and Zhi-Hua Zhou
|
Dynamic Regret of Online Markov Decision Processes
| null | null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate online Markov Decision Processes (MDPs) with adversarially
changing loss functions and known transitions. We choose dynamic regret as the
performance measure, defined as the performance difference between the learner
and any sequence of feasible changing policies. The measure is strictly
stronger than the standard static regret that benchmarks the learner's
performance with a fixed compared policy. We consider three foundational models
of online MDPs, including episodic loop-free Stochastic Shortest Path (SSP),
episodic SSP, and infinite-horizon MDPs. For these three models, we propose
novel online ensemble algorithms and establish their dynamic regret guarantees
respectively, in which the results for episodic (loop-free) SSP are provably
minimax optimal in terms of time horizon and certain non-stationarity measure.
Furthermore, when the online environments encountered by the learner are
predictable, we design improved algorithms and achieve better dynamic regret
bounds for the episodic (loop-free) SSP; and moreover, we demonstrate
impossibility results for the infinite-horizon MDPs.
|
[{'version': 'v1', 'created': 'Fri, 26 Aug 2022 07:42:53 GMT'}]
|
2022-08-29
|
[array(['Zhao', 'Peng', ''], dtype=object)
array(['Li', 'Long-Fei', ''], dtype=object)
array(['Zhou', 'Zhi-Hua', ''], dtype=object)]
|
16,426 |
1602.08093
|
Xin Liu
|
Xin Liu, Xiaopeng Li, Dong-Ling Deng, Xiong-Jun Liu and S. Das Sarma
|
Majorana spintronics
|
15 pages, 9 figures, replaced with published version
|
Phys. Rev. B 94, 014511 (2016)
|
10.1103/PhysRevB.94.014511
| null |
cond-mat.supr-con cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a systematic magnetic-flux-free approach to detect, manipulate and
braid Majorana fermions in a semiconductor nanowire-based topological Josephson
junction by utilizing the Majorana spin degree of freedom. We find an intrinsic
$\pi$-phase difference between spin-triplet pairings enforced by the Majorana
zeros modes (MZMs) at the two ends of a one-dimensional spinful topological
superconductor. This $\pi$-phase is identified to be a spin-dependent
superconducting phase, referred to as the spin-phase, which we show to be
tunable by controlling spin-orbit coupling strength via electric gates. This
electric controllable spin-phase not only affects the coupling energy between
MZMs but also leads to a fractional Josephson effect in the absence of any
applied magnetic flux, which enables the efficient topological qubit readout.
We thus propose an all-electrically controlled superconductor-semiconductor
hybrid circuit to manipulate MZMs and to detect their non-Abelian braiding
statistics properties. Our work on spin properties of topological Josephson
effects potentially opens up a new thrust for spintronic applications with
Majorana-based semiconductor quantum circuits.
|
[{'version': 'v1', 'created': 'Thu, 25 Feb 2016 20:59:49 GMT'}
{'version': 'v2', 'created': 'Fri, 15 Jul 2016 13:29:18 GMT'}]
|
2016-07-18
|
[array(['Liu', 'Xin', ''], dtype=object)
array(['Li', 'Xiaopeng', ''], dtype=object)
array(['Deng', 'Dong-Ling', ''], dtype=object)
array(['Liu', 'Xiong-Jun', ''], dtype=object)
array(['Sarma', 'S. Das', ''], dtype=object)]
|
16,427 |
1909.10545
|
Stefano Carignano
|
Stefano Carignano, Margaret E. Carrington and Joan Soto
|
The HTL Lagrangian at NLO: the photon case
|
14 pages, 2 figures. v2: typos fixed, added comments
| null |
10.1016/j.physletb.2019.135193
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We calculate the two loop hard correction to the photon self-energy in an
electron-positron plasma (EPP) for arbitrary soft momenta. This provides the
only missing ingredient to obtain the Hard Thermal Loop (HTL) effective
Lagrangian at next-to-leading order (NLO), and the full photon propagator at
the same order. This result can be easily extended to obtain the soft photon
propagator in a quark gluon plasma. We use the Keldysh representation of the
real time formalism in the massless fermion limit, and dimensional
regularization (DR) to regulate any ultraviolet (UV), infrared (IR) or
collinear divergences that appear in the intermediate steps of the calculation.
In the limit of soft photon momenta, our result is finite. It not only provides
an ${\cal O}(\alpha)$ correction to the Debye mass, but also a new non-local
structure. A consistent regularization of radial and angular integrals is
crucial to get this new structure. As an application we calculate the plasmon
dispersion relations at NLO.
|
[{'version': 'v1', 'created': 'Mon, 23 Sep 2019 18:04:47 GMT'}
{'version': 'v2', 'created': 'Wed, 8 Jan 2020 11:59:25 GMT'}]
|
2020-01-09
|
[array(['Carignano', 'Stefano', ''], dtype=object)
array(['Carrington', 'Margaret E.', ''], dtype=object)
array(['Soto', 'Joan', ''], dtype=object)]
|
16,428 |
1112.6342
|
Martin Magnuson
|
M. Magnuson, M. Mattesini, O. Wilhelmsson, J. Emmerlich, J. -P.
Palmquist, S. Li, R. Ahuja, L. Hultman, O. Eriksson and U. Jansson
|
Electronic structure and chemical bonding in Ti4SiC3 investigated by
soft x-ray emission spectroscopy and first principle theory
|
12 pages, 7 figures, 1 table
|
Physical Review B 74, 205102 (2006)
|
10.1103/PhysRevB.74.205102
| null |
cond-mat.mtrl-sci physics.comp-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The electronic structure in the new transition metal carbide Ti4SiC3 has been
investigated by bulk-sensitive soft x-ray emission spectroscopy and compared to
the well-studied Ti3SiC2 and TiC systems. The measured high-resolution Ti L, C
K and Si L x-ray emission spectra are discussed with ab initio calculations
based on density-functional theory including core-to-valence dipole matrix
elements. The detailed investigations of the Ti-C and Ti-Si chemical bonds
provide increased understanding of the physical properties of these
nanolaminates. A strongly modified spectral shape is detected for the buried Si
monolayers due to Si 3p hybridization with the Ti 3d orbitals. As a result of
relaxation of the crystal structure and the charge-transfer from Ti (and Si) to
C, the strength of the Ti-C covalent bond is increased. The differences between
the electronic and crystal structures of Ti4SiC3 and Ti3SiC2 are discussed in
relation to the number of Si layers per Ti layer in the two systems and the
corresponding change of materials properties.
|
[{'version': 'v1', 'created': 'Thu, 29 Dec 2011 16:22:34 GMT'}]
|
2011-12-30
|
[array(['Magnuson', 'M.', ''], dtype=object)
array(['Mattesini', 'M.', ''], dtype=object)
array(['Wilhelmsson', 'O.', ''], dtype=object)
array(['Emmerlich', 'J.', ''], dtype=object)
array(['Palmquist', 'J. -P.', ''], dtype=object)
array(['Li', 'S.', ''], dtype=object)
array(['Ahuja', 'R.', ''], dtype=object)
array(['Hultman', 'L.', ''], dtype=object)
array(['Eriksson', 'O.', ''], dtype=object)
array(['Jansson', 'U.', ''], dtype=object)]
|
16,429 |
1012.0718
|
Andreas Adelmann
|
Y. J. Bi and A. Adelmann and R. D\"olling and M. Humbel and W. Joho
and M. Seidel and T. J. Zhang
|
Towards Quantitative Simulations of High Power Proton Cyclotrons
|
Corrections and new figure
|
Phys.Rev.ST Accel.Beams 14:054402,2011
|
10.1103/PhysRevSTAB.14.054402
| null |
physics.acc-ph math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
PSI operates a cyclotron based high intensity proton accelerator routinely at
an average beam power of 1.3MW. With this power the facility is at the
worldwide forefront of high intensity proton accelerators. The beam current is
practically limited by losses at extraction and the resulting activation of
accelerator components. Further intensity upgrades and new projects aiming at
an even higher average beam power, are only possible if the relative losses can
be lowered in proportion, thus keeping absolute losses at a constant level.
Maintaining beam losses at levels allowing hands-on maintenance is a primary
challenge in any high power proton machine design and operation. In
consequence, predicting beam halo at these levels is a great challenge and will
be addressed in this paper. High power hadron driver have being used in many
disciplines of science and, a growing interest in the cyclotron technology for
high power hadron drivers are being observed very recently. This report will
briefly introduce OPAL, a tool for precise beam dynamics simulations including
3D space charge. One of OPAL's flavors (OPAL-cycl) is dedicated to high power
cyclotron modeling and is explained in greater detail. We then explain how to
obtain initial conditions for our PSI Ring cyclotron which still delivers the
world record in beam power of 1.3 MW continuous wave (cw). Several crucial
steps are explained necessary to be able to predict tails at the level of
3\sigma ... 4\sigma in the PSI Ring cyclotron. We compare our results at the
extraction with measurements, obtained with a 1.18 MW cw production beam. Based
on measurement data, we develop a simple linear model to predict beam sizes of
the extracted beam as a function of intensities and confirm the model with
simulations.
|
[{'version': 'v1', 'created': 'Fri, 3 Dec 2010 12:34:15 GMT'}
{'version': 'v2', 'created': 'Tue, 21 Dec 2010 18:31:16 GMT'}]
|
2015-03-17
|
[array(['Bi', 'Y. J.', ''], dtype=object)
array(['Adelmann', 'A.', ''], dtype=object)
array(['Dölling', 'R.', ''], dtype=object)
array(['Humbel', 'M.', ''], dtype=object)
array(['Joho', 'W.', ''], dtype=object)
array(['Seidel', 'M.', ''], dtype=object)
array(['Zhang', 'T. J.', ''], dtype=object)]
|
16,430 |
hep-ph/0212044
|
Peter Schweitzer
|
A.V. Efremov (Dubna, JINR), P. Schweitzer (Pavia U.)
|
The chirally-odd twist-3 distribution e(x)
|
19 pages, 3 figures, new references and figures added
|
JHEP 0308:006,2003
|
10.1088/1126-6708/2003/08/006
| null |
hep-ph
| null |
Properties of the nucleon twist-3 distribution function e(x) are reviewed. It
is emphasized that the QCD equations of motion imply the existence of a
delta-function at x=0 in e(x), which gives rise to the pion-nucleon sigma-term.
According to the resulting ``practical'' DIS sum rules the first and the second
moment of e(x) vanish, a situation analogue to that of the pure twist-3
distribution function $\bar{g}_2(x)$.
|
[{'version': 'v1', 'created': 'Tue, 3 Dec 2002 13:51:13 GMT'}
{'version': 'v2', 'created': 'Mon, 25 Aug 2003 15:08:52 GMT'}]
|
2014-11-17
|
[array(['Efremov', 'A. V.', '', 'Dubna, JINR'], dtype=object)
array(['Schweitzer', 'P.', '', 'Pavia U.'], dtype=object)]
|
16,431 |
cond-mat/9412088
| null |
G. Hackenbroich and H.A. Weidenmueller
|
Universality of Random-Matrix Results for non-Gaussian Ensembles
|
10 pages, RevTeX, no figures
| null |
10.1103/PhysRevLett.74.4118
| null |
cond-mat
| null |
We study random-matrix ensembles with a non-Gaussian probability distribution
$P(H) \sim \exp (-N {\rm tr }\, V(H))$ where $N$ is the dimension of the matrix
$H$ and $V(H)$ is independent of $N$. Using Efetov's supersymmetry formalism,
we show that in the limit $N \rightarrow \infty$ both energy level correlation
functions and correlation functions of $S$-matrix elements are independent of
$P(H)$ and hence universal on the scale of the local mean level spacing. This
statement applies to each of the three generic ensembles (unitary, orthogonal,
and symplectic). Universality is also found for correlation functions depending
on some external parameter. Our results generalize previous work by Brezin and
Zee [Nucl.\ Phys.\ B {\bf 402}, 613 (1993)].
|
[{'version': 'v1', 'created': 'Tue, 20 Dec 1994 12:40:33 GMT'}]
|
2009-10-22
|
[array(['Hackenbroich', 'G.', ''], dtype=object)
array(['Weidenmueller', 'H. A.', ''], dtype=object)]
|
16,432 |
2306.11113
|
Deep Pandey
|
Deep Pandey and Qi Yu
|
Learn to Accumulate Evidence from All Training Samples: Theory and
Practice
|
ICML 2023; Analysis and improvement of evidential deep learning
theory
| null | null | null |
cs.LG cs.AI cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
Evidential deep learning, built upon belief theory and subjective logic,
offers a principled and computationally efficient way to turn a deterministic
neural network uncertainty-aware. The resultant evidential models can quantify
fine-grained uncertainty using the learned evidence. To ensure theoretically
sound evidential models, the evidence needs to be non-negative, which requires
special activation functions for model training and inference. This constraint
often leads to inferior predictive performance compared to standard softmax
models, making it challenging to extend them to many large-scale datasets. To
unveil the real cause of this undesired behavior, we theoretically investigate
evidential models and identify a fundamental limitation that explains the
inferior performance: existing evidential activation functions create zero
evidence regions, which prevent the model to learn from training samples
falling into such regions. A deeper analysis of evidential activation functions
based on our theoretical underpinning inspires the design of a novel
regularizer that effectively alleviates this fundamental limitation. Extensive
experiments over many challenging real-world datasets and settings confirm our
theoretical findings and demonstrate the effectiveness of our proposed
approach.
|
[{'version': 'v1', 'created': 'Mon, 19 Jun 2023 18:27:12 GMT'}
{'version': 'v2', 'created': 'Sat, 24 Jun 2023 17:45:51 GMT'}]
|
2023-06-27
|
[array(['Pandey', 'Deep', ''], dtype=object)
array(['Yu', 'Qi', ''], dtype=object)]
|
16,433 |
2010.10406
|
S\'ebastien Designolle
|
S\'ebastien Designolle, Roope Uola, Kimmo Luoma, Nicolas Brunner
|
Set coherence: basis-independent quantification of quantum coherence
|
10 pages
|
Phys. Rev. Lett. 126, 220404 (2021)
|
10.1103/PhysRevLett.126.220404
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The coherence of an individual quantum state can be meaningfully discussed
only when referring to a preferred basis. This arbitrariness can however be
lifted when considering sets of quantum states. Here we introduce the concept
of set coherence for characterising the coherence of a set of quantum systems
in a basis-independent way. We construct measures for quantifying set coherence
of sets of quantum states as well as quantum measurements. These measures
feature an operational meaning in terms of discrimination games and capture
precisely the advantage offered by a given set over incoherent ones. Along the
way, we also connect the notion of set coherence to various resource-theoretic
approaches recently developed for quantum systems.
|
[{'version': 'v1', 'created': 'Tue, 20 Oct 2020 16:11:57 GMT'}
{'version': 'v2', 'created': 'Fri, 4 Jun 2021 14:35:28 GMT'}
{'version': 'v3', 'created': 'Mon, 7 Jun 2021 07:20:25 GMT'}]
|
2021-06-08
|
[array(['Designolle', 'Sébastien', ''], dtype=object)
array(['Uola', 'Roope', ''], dtype=object)
array(['Luoma', 'Kimmo', ''], dtype=object)
array(['Brunner', 'Nicolas', ''], dtype=object)]
|
16,434 |
math/0411490
|
Gert-Jan Heiden van der
|
G.J. van der Heiden
|
Drinfeld modular curve and Weil pairing
| null | null | null | null |
math.NT math.AG
| null |
In this paper we describe the compactification of the Drinfeld modular curve.
This compactification is analogous to the compactification of the classical
modular curve given by Katz and Mazur. We show how the Weil pairing on Drinfeld
modules that we defined in earlier work gives rise to a map on the Drinfeld
modular curve. We introduce the Tate-Drinfeld module and show how this
describes the formal neighbourhood of the scheme of cusps of the Drinfeld
modular curve.
|
[{'version': 'v1', 'created': 'Mon, 22 Nov 2004 16:37:55 GMT'}]
|
2007-05-23
|
[array(['van der Heiden', 'G. J.', ''], dtype=object)]
|
16,435 |
2306.09794
|
Wolfgang Muschik
|
Wolfgang Muschik
|
Second Law and its Amendment: the Axiom of No-reversible Directions --
Revisited
|
9 pages, Short Note
| null | null | null |
cond-mat.stat-mech
|
http://creativecommons.org/licenses/by/4.0/
|
A toy-model is used for describing the steps achieving the
no-reversible-direction axiom in a tutorial manner: i) choice of a state space
results in the balance equations on state space which are linear in the process
directions, ii) a reversible process direction cannot be generated by
combination of non-reversible ones, iii) process directions which are in the
kernel of the balance equations do not enter the entropy production. The
Coleman-Mizel formulation of the second law and the Liu relations follow
immediately.
|
[{'version': 'v1', 'created': 'Fri, 16 Jun 2023 12:05:03 GMT'}]
|
2023-06-19
|
[array(['Muschik', 'Wolfgang', ''], dtype=object)]
|
16,436 |
1508.01863
|
Christopher Lyons
|
Paul Lewis, Christopher Lyons
|
Some results on surfaces with p_g=q=1 and K^2=2
|
27 pages. Revised version with title change. To appear in Int. Math.
Res. Not
| null | null | null |
math.AG math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Following an idea of Ishida, we develop polynomial equations for certain
unramified double covers of surfaces with p_g=q=1 and K^2=2. Our first main
result provides an explicit surface surface X with these invariants defined
over Q that has Picard number 2, which is the smallest possible for these
surfaces. This is done by giving equations for the double cover Y of X,
calculating the zeta function of the reduction of Y to F_3, and extracting from
this the zeta function of the reduction of X to F_3; the basic idea used in
this process may also be of independent interest.
Our second main result is a big monodromy theorem for a family that contains
all surfaces with p_g=q=1, K^2=2, and K is ample. It follows from this that a
certain Hodge correspondence of Kuga and Satake, between such a surface and an
abelian variety, is motivated (and hence absolute Hodge). This allows us to
deduce our third main result, which is that the Tate Conjecture in
characteristic zero holds for all surfaces with p_g=q=1, K^2=2, and K ample.
|
[{'version': 'v1', 'created': 'Sat, 8 Aug 2015 07:31:29 GMT'}
{'version': 'v2', 'created': 'Wed, 21 Jun 2017 05:30:14 GMT'}]
|
2017-06-22
|
[array(['Lewis', 'Paul', ''], dtype=object)
array(['Lyons', 'Christopher', ''], dtype=object)]
|
16,437 |
1908.01291
|
Karen Kheruntsyan
|
Y. Y. Atas, S. A. Simmons, and K. V. Kheruntsyan
|
Finite-temperature dynamics of a Tonks-Girardeau gas in a
frequency-modulated harmonic trap
|
15 pages, 8 figures
|
Phys. Rev. A 100, 043602 (2019)
|
10.1103/PhysRevA.100.043602
| null |
cond-mat.quant-gas quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the out-of-equilibrium dynamics of a finite-temperature harmonically
trapped Tonks-Girardeau gas induced by periodic modulation of the trap
frequency. We give explicit exact solutions for the real-space density and
momentum distributions of this interacting many-body system and characterize
the stability diagram of the dynamics by mapping the many-body solution to the
solution and stability diagram of Mathieu's differential equation. The mapping
allows one to deduce the exact structure of parametric resonances in the
parameter space characterized by the driving amplitude and frequency of the
modulation. Furthermore, we analyze the same problem within the
finite-temperature hydrodynamic approach and show that the respective solutions
to the hydrodynamic equations can be mapped to the same Mathieu equation.
Accordingly, the stability diagram and the structure of resonances following
from the hydrodynamic approach is exactly the same as those obtained from the
exact many-body solution.
|
[{'version': 'v1', 'created': 'Sun, 4 Aug 2019 08:05:04 GMT'}]
|
2019-10-09
|
[array(['Atas', 'Y. Y.', ''], dtype=object)
array(['Simmons', 'S. A.', ''], dtype=object)
array(['Kheruntsyan', 'K. V.', ''], dtype=object)]
|
16,438 |
astro-ph/0409344
|
Sergei Popov B.
|
S.B. Popov (Sternberg Astronomical Institute, Universita di Padova)
|
Close by Compact Objects and Recent Supernovae in the Solar Vicinity
|
12 pages, proceedings of the International School of Cosmic Ray
Astrophysics, 14th Course: "Neutrinos and Explosive Events in the Universe"
| null | null | null |
astro-ph
| null |
I discuss young close-by compact objects, recent supernovae in the solar
neighbourhood, and point to their connection with cosmic ray studies.
Especially the role of the Gould Belt is underlined.
|
[{'version': 'v1', 'created': 'Tue, 14 Sep 2004 18:10:51 GMT'}]
|
2007-05-23
|
[array(['Popov', 'S. B.', '',
'Sternberg Astronomical Institute, Universita di Padova'],
dtype=object) ]
|
16,439 |
hep-ph/9505324
| null |
V. Ilyin, A. Pukhov, V. Savrin, A. Semenov and W. von Schlippe
|
On a Method of Identification of Leptoquarks Produced in ep Collisions
|
6 pages of text in standard LATEX code; 6 figures in one PS file,
prepared by standard script 'uufiles' (see comment at the head of the
received file)
|
Phys.Lett. B356 (1995) 531-538
|
10.1016/0370-2693(95)00826-7
|
INP MSU Preprint-95-12/376; QMW-PH-95-13
|
hep-ph
| null |
We analyse numerically manifestations of the radiative amplitude zero (RAZ)
effect in single leptoquark production associated with hard photon emission. We
present some quantitative conclusions on the possibility to distinguish
leptoquark charges produced in ep collisions taking account of three-body final
state subprocesses and of proton structure functions. Applying this method to
HERA and possible LEP+LHC experiments we show that the RAZ analysis can serve
as a tool to determine the leptoquark electric charge up to large leptoquark
masses.
|
[{'version': 'v1', 'created': 'Wed, 17 May 1995 14:43:23 GMT'}]
|
2009-10-28
|
[array(['Ilyin', 'V.', ''], dtype=object)
array(['Pukhov', 'A.', ''], dtype=object)
array(['Savrin', 'V.', ''], dtype=object)
array(['Semenov', 'A.', ''], dtype=object)
array(['von Schlippe', 'W.', ''], dtype=object)]
|
16,440 |
2008.09694
|
Carlo Biffi
|
Carlo Biffi, Steven McDonagh, Philip Torr, Ales Leonardis, Sarah
Parisot
|
Many-shot from Low-shot: Learning to Annotate using Mixed Supervision
for Object Detection
|
Accepted at ECCV 2020. Camera-ready version and Appendices
| null | null | null |
cs.CV eess.IV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Object detection has witnessed significant progress by relying on large,
manually annotated datasets. Annotating such datasets is highly time consuming
and expensive, which motivates the development of weakly supervised and
few-shot object detection methods. However, these methods largely underperform
with respect to their strongly supervised counterpart, as weak training signals
\emph{often} result in partial or oversized detections. Towards solving this
problem we introduce, for the first time, an online annotation module (OAM)
that learns to generate a many-shot set of \emph{reliable} annotations from a
larger volume of weakly labelled images. Our OAM can be jointly trained with
any fully supervised two-stage object detection method, providing additional
training annotations on the fly. This results in a fully end-to-end strategy
that only requires a low-shot set of fully annotated images. The integration of
the OAM with Fast(er) R-CNN improves their performance by $17\%$ mAP, $9\%$
AP50 on PASCAL VOC 2007 and MS-COCO benchmarks, and significantly outperforms
competing methods using mixed supervision.
|
[{'version': 'v1', 'created': 'Fri, 21 Aug 2020 22:06:43 GMT'}
{'version': 'v2', 'created': 'Wed, 26 Aug 2020 17:26:13 GMT'}]
|
2020-08-27
|
[array(['Biffi', 'Carlo', ''], dtype=object)
array(['McDonagh', 'Steven', ''], dtype=object)
array(['Torr', 'Philip', ''], dtype=object)
array(['Leonardis', 'Ales', ''], dtype=object)
array(['Parisot', 'Sarah', ''], dtype=object)]
|
16,441 |
1708.09351
|
Ioannis Lestas
|
Andreas Kasis, Nima Monshizadeh and Ioannis Lestas
|
Secondary frequency control with on-off load side participation in power
networks
| null | null | null | null |
math.OC cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the problem of decentralized secondary frequency regulation in power
networks where ancillary services are provided via on-off load-side
participation. We initially consider on-off loads that switch when prescribed
frequency thresholds are exceeded, together with a large class of passive
continuous dynamics for generation and demand. The considered on-off loads are
able to assist existing secondary frequency control mechanisms and return to
their nominal operation when the power system is restored to its normal
operation, a highly desirable feature which minimizes users disruption. We show
that system stability is not compromised despite the switching nature of the
loads. However, such control policies are prone to chattering, which limits the
practicality of these schemes. As a remedy to this problem, we propose a
hysteretic on-off policy where loads switch on and off at different frequency
thresholds and show that stability guarantees are retained when the same
decentralized passivity conditions for continuous generation and demand hold.
Several relevant examples are discussed to demonstrate the applicability of the
proposed results. Furthermore, we verify our analytic results with numerical
investigations on the Northeast Power Coordinating Council (NPCC) 140-bus
system.
|
[{'version': 'v1', 'created': 'Wed, 30 Aug 2017 16:30:42 GMT'}
{'version': 'v2', 'created': 'Fri, 22 Mar 2019 16:13:08 GMT'}
{'version': 'v3', 'created': 'Sat, 14 Sep 2019 21:41:17 GMT'}]
|
2019-09-17
|
[array(['Kasis', 'Andreas', ''], dtype=object)
array(['Monshizadeh', 'Nima', ''], dtype=object)
array(['Lestas', 'Ioannis', ''], dtype=object)]
|
16,442 |
1404.3469
|
Martin Trinks
|
Xueliang Li and Yongtang Shi and Martin Trinks
|
Polynomial reconstruction of the matching polynomial
|
8 pages, 2 figures
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The matching polynomial of a graph is the generating function of the numbers
of its matchings with respect to their cardinality. A graph polynomial is
polynomial reconstructible, if its value for a graph can be determined from its
values for the vertex-deleted subgraphs of the same graph. This note discusses
the polynomial reconstructibility of the matching polynomial. We collect
previous results, prove it for graphs with pendant edges and disprove it for
some graphs.
|
[{'version': 'v1', 'created': 'Mon, 14 Apr 2014 06:33:37 GMT'}]
|
2014-04-15
|
[array(['Li', 'Xueliang', ''], dtype=object)
array(['Shi', 'Yongtang', ''], dtype=object)
array(['Trinks', 'Martin', ''], dtype=object)]
|
16,443 |
2202.07201
|
Pin-Yu Chen
|
Pin-Yu Chen and Sijia Liu
|
Holistic Adversarial Robustness of Deep Learning Models
|
survey paper on holistic adversarial robustness for deep learning;
published at AAAI 2023 Senior Member Presentation Track
| null | null | null |
cs.LG cs.AI cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Adversarial robustness studies the worst-case performance of a machine
learning model to ensure safety and reliability. With the proliferation of
deep-learning-based technology, the potential risks associated with model
development and deployment can be amplified and become dreadful
vulnerabilities. This paper provides a comprehensive overview of research
topics and foundational principles of research methods for adversarial
robustness of deep learning models, including attacks, defenses, verification,
and novel applications.
|
[{'version': 'v1', 'created': 'Tue, 15 Feb 2022 05:30:27 GMT'}
{'version': 'v2', 'created': 'Wed, 4 Jan 2023 14:37:37 GMT'}
{'version': 'v3', 'created': 'Thu, 5 Jan 2023 13:40:52 GMT'}]
|
2023-01-06
|
[array(['Chen', 'Pin-Yu', ''], dtype=object)
array(['Liu', 'Sijia', ''], dtype=object)]
|
16,444 |
1811.05580
|
Majid Soleimani Nia
|
Majid Soleimani nia, Brian Maxwell, Peter Oshkai and Ned Djilali
|
Measurements of Flow Velocity and Scalar Concentration in Turbulent
Multi-component Jets: Asymmetry and Buoyancy Effects
|
22 pages, 12 figures, submitted for publication in Journal of Fluid
Mechanics
| null | null | null |
physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Buoyancy effects and nozzle geometry can have a significant impact on
turbulent jet dispersion. This work was motivated by applications involving
hydrogen. Using helium as an experimental proxy, buoyant horizontal jets
issuing from a round orifice on the side wall of a circular tube were analysed
experimentally using particle image velocimetry (PIV) and planar laser-induced
fluorescence (PLIF) techniques simultaneously to provide instantaneous and
time-averaged flow fields of velocity and concentration. Effects of buoyancy
and asymmetry on the resulting flow structure were studied over a range of
Reynolds numbers and gas densities. Significant differences were found between
the centreline trajectory, spreading rate, and velocity decay of conventional
horizontal round axisymmetric jets issuing through flat plates and the pipeline
leak-representative jets considered in the present study. The realistic
pipeline jets were always asymmetric and found to deflect about the jet axis in
the near field. In the far field, it was found that the realistic pipeline leak
geometry causes buoyancy effects to dominate much sooner than expected compared
to horizontal round jets issuing through flat plates.
|
[{'version': 'v1', 'created': 'Wed, 14 Nov 2018 00:47:51 GMT'}]
|
2018-11-15
|
[array(['nia', 'Majid Soleimani', ''], dtype=object)
array(['Maxwell', 'Brian', ''], dtype=object)
array(['Oshkai', 'Peter', ''], dtype=object)
array(['Djilali', 'Ned', ''], dtype=object)]
|
16,445 |
2203.12692
|
Puneet Kumar
|
Puneet Kumar, Gaurav Bhat, Omkar Ingle, Daksh Goyal and
Balasubramanian Raman
|
Affective Feedback Synthesis Towards Multimodal Text and Image Data
|
Submitted to ACM Transactions on Multimedia Computing,
Communications, and Applications
| null | null | null |
cs.MM cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
In this paper, we have defined a novel task of affective feedback synthesis
that deals with generating feedback for input text & corresponding image in a
similar way as humans respond towards the multimodal data. A feedback synthesis
system has been proposed and trained using ground-truth human comments along
with image-text input. We have also constructed a large-scale dataset
consisting of image, text, Twitter user comments, and the number of likes for
the comments by crawling the news articles through Twitter feeds. The proposed
system extracts textual features using a transformer-based textual encoder
while the visual features have been extracted using a Faster region-based
convolutional neural networks model. The textual and visual features have been
concatenated to construct the multimodal features using which the decoder
synthesizes the feedback. We have compared the results of the proposed system
with the baseline models using quantitative and qualitative measures. The
generated feedbacks have been analyzed using automatic and human evaluation.
They have been found to be semantically similar to the ground-truth comments
and relevant to the given text-image input.
|
[{'version': 'v1', 'created': 'Wed, 23 Mar 2022 19:28:20 GMT'}
{'version': 'v2', 'created': 'Thu, 31 Mar 2022 05:20:40 GMT'}]
|
2022-04-01
|
[array(['Kumar', 'Puneet', ''], dtype=object)
array(['Bhat', 'Gaurav', ''], dtype=object)
array(['Ingle', 'Omkar', ''], dtype=object)
array(['Goyal', 'Daksh', ''], dtype=object)
array(['Raman', 'Balasubramanian', ''], dtype=object)]
|
16,446 |
cond-mat/9808131
|
Lothar Schuelke
|
A. Jaster, J. Mainville, L. Schuelke (Siegen) and B. Zheng (Halle)
|
Short-time Critical Dynamics of the 3-Dimensional Ising Model
|
8 pages with 7 figures
|
J. Phys. A: Math. Gen. 32 (1999) 1395
|
10.1088/0305-4470/32/8/008
| null |
cond-mat.stat-mech cond-mat.soft
| null |
Comprehensive Monte Carlo simulations of the short-time dynamic behaviour are
reported for the three-dimensional Ising model at criticality. Besides the
exponent $\theta$ of the critical initial increase and the dynamic exponent
$z$, the static critical exponents $\nu$ and $\beta$ as well as the critical
temperature are determined from the power-law scaling behaviour of observables
at the beginning of the time evolution. States of very high temperature as well
as of zero temperature are used as initial states for the simulations.
|
[{'version': 'v1', 'created': 'Wed, 12 Aug 1998 18:56:25 GMT'}]
|
2009-10-31
|
[array(['Jaster', 'A.', '', 'Siegen'], dtype=object)
array(['Mainville', 'J.', '', 'Siegen'], dtype=object)
array(['Schuelke', 'L.', '', 'Siegen'], dtype=object)
array(['Zheng', 'B.', '', 'Halle'], dtype=object)]
|
16,447 |
1305.2855
|
Hamid Reza Salimi Moghaddam
|
H. R. Salimi Moghaddam
|
On the Geometry of some Para-hypercomplex Lie groups
| null |
Archivum Mathematicom BRNO 45 (2009) 159-170
| null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, firstly we study some left invariant Riemannian metrics on
para-hypercomplex 4-dimensional Lie groups. In each Lie group, the Levi-Civita
connection and sectional curvature have been given explicitly. We also show
these spaces have constant negative scalar curvatures. Then by using left
invariant Riemannian metrics introduced in the first part, we construct some
left invariant Randers metrics of Berwald type. The explicit formulas for
computing flag curvature have been obtained in all cases. Some of these Finsler
Lie groups are of non-positive flag curvature.
|
[{'version': 'v1', 'created': 'Wed, 1 May 2013 12:59:06 GMT'}]
|
2015-07-09
|
[array(['Moghaddam', 'H. R. Salimi', ''], dtype=object)]
|
16,448 |
physics/9806017
|
Ulrich Hans Ewald Hansmann
|
Ulrich H.E. Hansmann, Yuko Okamoto
|
Tertiary structure prediction of C-peptide of ribonuclease A by
multicanonical algorithm
|
Latex, 3 Figures
|
J. Phys. Chem. B 102 (1998) 653-656
| null |
IMS-THE-97-4
|
physics.chem-ph physics.bio-ph q-bio
| null |
We have performed multicanonical Monte Carlo simulations of C-peptide of
ribonuclease A. It is known by CD and NMR experiments that this peptide has
high alpha-helix content in aqueous solution and that the side-chain charges of
residues Glu-2$^-$ and His-12$^+$ play an important role in the stability of
the alpha-helix. In order to confirm these experimental implications, we have
used two analogues of the peptide with charged and neutral side chains of Glu-2
and His-12. Two dielectric functions, distance-dependent and constant, are
considered to study the effects of solvent contributions. All the simulations
were started from random initial conformations. Various thermodynamic
quantities such as average helicity as a function of residue number and average
distance between two side chains as a function of temperature are calculated.
The results are found to be in accord with the implications of CD and NMR
experiments. The lowest-energy conformation obtained has an alpha-helix from
Ala-4 to Gln-11 in complete agreement with the corresponding structure deduced
from an X-ray crystallography experiment of ribonuclease A. It is shown that
the salt bridge between the side chains of Glu-2$^-$ and Arg-10$^+$, which is
known to exist from both NMR and X-ray experiments, is formed only when the
side chains are properly charged. Its formation is greatly enhanced when the
distance-dependent dielectric function is used.
|
[{'version': 'v1', 'created': 'Fri, 12 Jun 1998 04:51:51 GMT'}]
|
2007-05-23
|
[array(['Hansmann', 'Ulrich H. E.', ''], dtype=object)
array(['Okamoto', 'Yuko', ''], dtype=object)]
|
16,449 |
1708.02174
|
Mehran Maghoumi
|
Pooya Khaloo, Mehran Maghoumi, Eugene Taranta II, David Bettner,
Joseph Laviola Jr
|
Code Park: A New 3D Code Visualization Tool
|
Accepted for publication in 2017 IEEE Working Conference on Software
Visualization (VISSOFT 2017); Supplementary video:
https://www.youtube.com/watch?v=LUiy1M9hUKU
| null | null | null |
cs.HC cs.SE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce Code Park, a novel tool for visualizing codebases in a 3D
game-like environment. Code Park aims to improve a programmer's understanding
of an existing codebase in a manner that is both engaging and intuitive,
appealing to novice users such as students. It achieves these goals by laying
out the codebase in a 3D park-like environment. Each class in the codebase is
represented as a 3D room-like structure. Constituent parts of the class
(variable, member functions, etc.) are laid out on the walls, resembling a
syntax-aware "wallpaper". The users can interact with the codebase using an
overview, and a first-person viewer mode. We conducted two user studies to
evaluate Code Park's usability and suitability for organizing an existing
project. Our results indicate that Code Park is easy to get familiar with and
significantly helps in code understanding compared to a traditional IDE.
Further, the users unanimously believed that Code Park was a fun tool to work
with.
|
[{'version': 'v1', 'created': 'Mon, 7 Aug 2017 15:53:10 GMT'}]
|
2017-08-08
|
[array(['Khaloo', 'Pooya', ''], dtype=object)
array(['Maghoumi', 'Mehran', ''], dtype=object)
array(['Taranta', 'Eugene', 'II'], dtype=object)
array(['Bettner', 'David', ''], dtype=object)
array(['Laviola', 'Joseph', 'Jr'], dtype=object)]
|
16,450 |
cond-mat/0608111
|
Steven Watts
|
S. M. Watts and B. J. van Wees
|
An electron spin injection driven, paramagnetic solid-state MASER device
|
To be published Phys. Rev. Lett
| null | null | null |
cond-mat.mtrl-sci
| null |
In response to an external, microwave-frequency magnetic field, a
paramagnetic medium will absorb energy from the field that drives the
magnetization dynamics. Here we describe a new process by which an external
spin injection source, when combined with the microwave field spin-pumping, can
drive the paramagnetic medium from one that absorbs microwave energy to one
that emits microwave energy. We derive a simple condition for the crossover
from absorptive to emissive behavior. Based on this process, we propose a spin
injection-driven paramagnetic MASER device.
|
[{'version': 'v1', 'created': 'Fri, 4 Aug 2006 11:12:47 GMT'}]
|
2007-05-23
|
[array(['Watts', 'S. M.', ''], dtype=object)
array(['van Wees', 'B. J.', ''], dtype=object)]
|
16,451 |
2201.00856
|
Mathieu Dumberry
|
Mathieu Dumberry and Colin More
|
Weak magnetic field changes over the Pacific due to high conductance in
lowermost mantle
|
27 pages, 4 figures
|
Nature Geoscience, 2020, vol 13, 516-520
|
10.1038/s41561-020-0589-y
| null |
physics.geo-ph
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
For the past few centuries, the temporal variation in the Earth's magnetic
field in the Pacific region has been anomalously low. The reason for this is
tied to large scale flows in the liquid outer core near the core-mantle
boundary, which are weaker under the Pacific and feature a planetary scale gyre
that is eccentric and broadly avoids this region. However, what regulates this
type of flow morphology is unknown. Here, we present results from a numerical
model of the dynamics in Earth's core that includes electromagnetic coupling
with a non-uniform conducting layer at the base of the mantle. We show that
when the conductance of this layer is higher under the Pacific than elsewhere,
the larger electromagnetic drag force weakens the local core flows and deflects
the flow of the planetary gyre away from the Pacific. The nature of the
lowermost mantle conductance remains unclear, but stratified core fluid trapped
within topographic undulations of the core-mantle boundary is a possible
explanation.
|
[{'version': 'v1', 'created': 'Mon, 3 Jan 2022 19:42:14 GMT'}]
|
2022-01-05
|
[array(['Dumberry', 'Mathieu', ''], dtype=object)
array(['More', 'Colin', ''], dtype=object)]
|
16,452 |
2209.09160
|
Valery V. Ryzhikov
|
Valery V. Ryzhikov
|
Generic extensions of ergodic actions
|
in Russian
| null | null | null |
math.DS
|
http://creativecommons.org/licenses/by/4.0/
|
The article considers generic extensions of measure-preserving actions,
particularly, the lifting of some action invariants. The work is encouraged by
recent results of Austin, Glasner, Thouvenot, and Weiss. We prove that the
P-entropy of the generic extensions with finite P-entropy, which is an
invariant of the Kushnirenko entropy type, is infinite. A different approach is
exploited to obtain the result of the above-mentioned authors that the generic
extension of an deterministic action is not isomorphic to this action. We have
proved that generic cocycles are recurrent. It is shown that typical extensions
preserve the singularity of the spectrum, partial rigidity, mildly mixing,
mixing (we announced similar stability for multiple mixing and PID property of
actions). At the same time, the lifting of some algebraic properties under the
generic extension may depend on the statistical properties of the base. Typical
measurable families of automorphisms are considered as well. The dynamic
behavior of such families is a bit unusual. It is characterized by both dynamic
conformism and dynamic individualism of the representatives of the generic
family.
|
[{'version': 'v1', 'created': 'Mon, 19 Sep 2022 16:29:10 GMT'}
{'version': 'v2', 'created': 'Thu, 22 Sep 2022 12:18:54 GMT'}
{'version': 'v3', 'created': 'Thu, 6 Oct 2022 16:38:45 GMT'}
{'version': 'v4', 'created': 'Tue, 11 Oct 2022 04:53:05 GMT'}]
|
2022-10-12
|
[array(['Ryzhikov', 'Valery V.', ''], dtype=object)]
|
16,453 |
hep-th/9810052
|
Elcio Abdalla
|
E. Abdalla and N. Alves
|
Numerical study of the decay amplitudes in two dimensional QCD
|
latex, 22 pages, 6 figures
| null | null | null |
hep-th
| null |
After presenting a survey of theoretical results concerning the structure of
two-dimensional QCD, we present a numerical study related to the mass
eigenstates and the decay amplitudes of higher mesonic states. We discuss in
detail the fate of important dynamical points such as stability of the spectrum
and the problem of screening versus confinement in this context. We point out
differences in the large distance behaviour of the potential, which can be
responsible for the question of stability of the spectrum, as well as whether
it is finite.
|
[{'version': 'v1', 'created': 'Fri, 9 Oct 1998 00:30:33 GMT'}]
|
2007-05-23
|
[array(['Abdalla', 'E.', ''], dtype=object)
array(['Alves', 'N.', ''], dtype=object)]
|
16,454 |
2306.08274
|
Seiji Maekawa
|
Seiji Maekawa, Yuya Sasaki, Makoto Onizuka
|
Why Using Either Aggregated Features or Adjacency Lists in Directed or
Undirected Graph? Empirical Study and Simple Classification Method
| null | null | null | null |
cs.LG cs.SI
|
http://creativecommons.org/licenses/by/4.0/
|
Node classification is one of the hottest tasks in graph analysis. In this
paper, we focus on the choices of node representations (aggregated features vs.
adjacency lists) and the edge direction of an input graph (directed vs.
undirected), which have a large influence on classification results. We address
the first empirical study to benchmark the performance of various GNNs that use
either combination of node representations and edge directions. Our experiments
demonstrate that no single combination stably achieves state-of-the-art results
across datasets, which indicates that we need to select appropriate
combinations depending on the characteristics of datasets. In response, we
propose a simple yet holistic classification method A2DUG which leverages all
combinations of node representation variants in directed and undirected graphs.
We demonstrate that A2DUG stably performs well on various datasets.
Surprisingly, it largely outperforms the current state-of-the-art methods in
several datasets. This result validates the importance of the adaptive effect
control on the combinations of node representations and edge directions.
|
[{'version': 'v1', 'created': 'Wed, 14 Jun 2023 06:24:58 GMT'}]
|
2023-06-16
|
[array(['Maekawa', 'Seiji', ''], dtype=object)
array(['Sasaki', 'Yuya', ''], dtype=object)
array(['Onizuka', 'Makoto', ''], dtype=object)]
|
16,455 |
2201.00616
|
Joshua Bensemann
|
Joshua Bensemann, Qiming Bao, Ga\"el Gendron, Tim Hartill, Michael
Witbrock
|
Relating Blindsight and AI: A Review
|
Preprint of an article published in Journal of Artificial
Intelligence and Consciousness, 2021 doi.org/10.1142/S2705078521500156
\c{opyright} copyright World Scientific Publishing Company
www.worldscientific.com/worldscinet/jaic
|
Journal of Artificial Intelligence and Consciousness, 1-15 (2021)
|
10.1142/S2705078521500156
| null |
q-bio.NC cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Processes occurring in brains, a.k.a. biological neural networks, can and
have been modeled within artificial neural network architectures. Due to this,
we have conducted a review of research on the phenomenon of blindsight in an
attempt to generate ideas for artificial intelligence models. Blindsight can be
considered as a diminished form of visual experience. If we assume that
artificial networks have no form of visual experience, then deficits caused by
blindsight give us insights into the processes occurring within visual
experience that we can incorporate into artificial neural networks. This
article has been structured into three parts. Section 2 is a review of
blindsight research, looking specifically at the errors occurring during this
condition compared to normal vision. Section 3 identifies overall patterns from
Section 2 to generate insights for computational models of vision. Section 4
demonstrates the utility of examining biological research to inform artificial
intelligence research by examining computation models of visual attention
relevant to one of the insights generated in Section 3. The research covered in
Section 4 shows that incorporating one of our insights into computational
vision does benefit those models. Future research will be required to determine
whether our other insights are as valuable.
|
[{'version': 'v1', 'created': 'Thu, 9 Dec 2021 02:33:11 GMT'}]
|
2022-01-04
|
[array(['Bensemann', 'Joshua', ''], dtype=object)
array(['Bao', 'Qiming', ''], dtype=object)
array(['Gendron', 'Gaël', ''], dtype=object)
array(['Hartill', 'Tim', ''], dtype=object)
array(['Witbrock', 'Michael', ''], dtype=object)]
|
16,456 |
1204.3558
|
Mehedi Kalam
|
Sk. Monowar Hossein, Farook Rahaman, Jayanta Naskar, Mehedi Kalam and
Saibal Ray
|
Anisotropic Compact stars with variable cosmological constant
|
6 pages, 8 figures. Minor revisions have been made. Accepted in IJMPD
| null |
10.1142/S0218271812500885
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently the small value of the cosmological constant and its ability to
accelerate the expansion of the Universe is of great interest. We discuss the
possibility of forming of anisotropic compact stars from this cosmological
constant as one of the competent candidates of dark energy. For this purpose we
consider the analytical solution of Krori and Barua metric. We take the radial
dependence of cosmological constant and check all the regularity conditions,
TOV equations, stability and surface redshift of the compact stars. It has been
shown as conclusion that this model is valid for any compact star and we have
cited $4U 1820-30$ as a specific example of that kind of star.
|
[{'version': 'v1', 'created': 'Mon, 16 Apr 2012 16:28:37 GMT'}
{'version': 'v2', 'created': 'Thu, 22 Nov 2012 15:50:11 GMT'}]
|
2015-06-04
|
[array(['Hossein', 'Sk. Monowar', ''], dtype=object)
array(['Rahaman', 'Farook', ''], dtype=object)
array(['Naskar', 'Jayanta', ''], dtype=object)
array(['Kalam', 'Mehedi', ''], dtype=object)
array(['Ray', 'Saibal', ''], dtype=object)]
|
16,457 |
astro-ph/9611117
|
Rene Ong
|
CASA-MIA Collaboration
|
A High Statistics Search for Ultra-High Energy Gamma-Ray Emission from
Cygnus X-3 and Hercules X-1
|
26 LaTeX pages, 16 PostScript figures, uses psfig.sty to be published
in Physical Review D
|
Phys.Rev.D55:1714-1731,1997
|
10.1103/PhysRevD.55.1714
|
EFI 96-25
|
astro-ph
| null |
We have carried out a high statistics (2 Billion events) search for
ultra-high energy gamma-ray emission from the X-ray binary sources Cygnus X-3
and Hercules X-1. Using data taken with the CASA-MIA detector over a five year
period (1990-1995), we find no evidence for steady emission from either source
at energies above 115 TeV. The derived upper limits on such emission are more
than two orders of magnitude lower than earlier claimed detections. We also
find no evidence for neutral particle or gamma-ray emission from either source
on time scales of one day and 0.5 hr. For Cygnus X-3, there is no evidence for
emission correlated with the 4.8 hr X-ray periodicity or with the occurrence of
large radio flares. Unless one postulates that these sources were very active
earlier and are now dormant, the limits presented here put into question the
earlier results, and highlight the difficulties that possible future
experiments will have in detecting gamma-ray signals at ultra-high energies.
|
[{'version': 'v1', 'created': 'Thu, 14 Nov 1996 21:23:47 GMT'}]
|
2009-12-30
|
[array(['MIA Collaboration', '', ''], dtype=object)]
|
16,458 |
2203.16796
|
Nikhil Tripathi
|
Nikhil Tripathi
|
Delays have Dangerous Ends: Slow HTTP/2 DoS attacks into the Wild and
their Real-Time Detection using Event Sequence Analysis
|
11 pages, 8 figures
| null | null | null |
cs.CR
|
http://creativecommons.org/licenses/by/4.0/
|
The robustness principle, written by Jon Postel in an early version of TCP
implementation, states that the communicating entities should be liberal while
accepting the data. Several entities on the Internet do follow this principle.
For instance, in this work, we show that many popular web servers on the
Internet are generous as they wait for a substantial time period to receive the
remaining portion of an incomplete web request. Unfortunately, this behavior
also makes them vulnerable to a class of cyber attacks, commonly known as Slow
Rate DoS attacks. HTTP/2, the recent version of HTTP, is recently found
vulnerable to these attacks. However, the impact of Slow HTTP/2 DoS attacks on
real web servers on the Internet has not been studied yet. Also, to the best of
our knowledge, there is no defense scheme known to detect Slow Rate DoS attacks
against HTTP/2 in real-time. To bridge these gaps, we first test the behavior
of HTTP/2 supporting web servers on the Internet against Slow HTTP/2 DoS
attacks. Subsequently, we propose a scheme to detect these attacks in
real-time. We show that the proposed detection scheme can detect attacks in
real-time with high accuracy and marginal computational overhead.
|
[{'version': 'v1', 'created': 'Thu, 31 Mar 2022 04:53:35 GMT'}]
|
2022-04-01
|
[array(['Tripathi', 'Nikhil', ''], dtype=object)]
|
16,459 |
0803.4336
|
Anton R. Schep
|
Anton R. Schep
|
Products and Factors of Banach function spaces
|
16 pages
| null | null | null |
math.FA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Given two Banach function spaces we study the pointwise product space E.F,
especially for the case that the pointwise product of their unit balls is again
convex. We then give conditions on when the pointwise product E . M(E, F)=F,
where M(E,F) denotes the space of multiplication operators from E into F.
|
[{'version': 'v1', 'created': 'Sun, 30 Mar 2008 18:39:01 GMT'}]
|
2008-04-01
|
[array(['Schep', 'Anton R.', ''], dtype=object)]
|
16,460 |
1305.1967
|
Dayal Christopher Strub
|
Robert S MacKay and Dayal C Strub
|
Bifurcations of transition states: Morse bifurcations
|
36 pages, final version - some improvements to clarity and notation,
fixed typos, added some references
|
Nonlinearity 27 (2014) 859-895
|
10.1088/0951-7715/27/5/859
| null |
nlin.CD math-ph math.DS math.MP physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A transition state for a Hamiltonian system is a closed, invariant, oriented,
codimension-2 submanifold of an energy-level that can be spanned by two compact
codimension-1 surfaces of unidirectional flux whose union, called a dividing
surface, locally separates the energy-level into two components and has no
local recrossings. For this to happen robustly to all smooth perturbations, the
transition state must be normally hyperbolic. The dividing surface then has
locally minimal geometric flux through it, giving an upper bound on the rate of
transport in either direction. Transition states diffeomorphic to $\mathbb
S^{2m-3}$ are known to exist for energies just above any index-1 critical point
of a Hamiltonian of $m$ degrees of freedom, with dividing surfaces $\mathbb
S^{2m-2}$. The question addressed here is what qualitative changes in the
transition state, and consequently the dividing surface, may occur as the
energy or other parameters are varied? We find that there is a class of systems
for which the transition state becomes singular and then regains normal
hyperbolicity with a change in diffeomorphism class. These are Morse
bifurcations. Various examples are considered. Firstly, some simple examples in
which transition states connect or disconnect, and the dividing surface may
become a torus or other. Then, we show how sequences of Morse bifurcations
producing various interesting forms of transition state and dividing surface
are present in reacting systems, by considering a hypothetical class of
bimolecular reactions in gas phase.
|
[{'version': 'v1', 'created': 'Wed, 8 May 2013 22:03:10 GMT'}
{'version': 'v2', 'created': 'Wed, 19 Jun 2013 11:09:44 GMT'}
{'version': 'v3', 'created': 'Thu, 17 Apr 2014 13:04:01 GMT'}]
|
2014-04-18
|
[array(['MacKay', 'Robert S', ''], dtype=object)
array(['Strub', 'Dayal C', ''], dtype=object)]
|
16,461 |
0806.4003
|
Gokhan Unel
|
T. Cuhadar-Donszelmann, M. Karagoz Unel, V. E. Ozcan, S. Sultansoy, G.
Unel
|
Fourth Family Neutrinos and the Higgs Boson
|
12 pages, uses axodraw.sty, v2: includes typo fixes, improved
analysis, v4: minor modifications in response to the JHEP referee
|
JHEP 0810:074,2008
|
10.1088/1126-6708/2008/10/074
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We evaluate the LHC discovery potential for the fourth family Standard Model
neutrinos in the process $pp\to Z/h\to\nu_{4}{\bar{\nu}_{4}}\to W\mu W\mu$. We
show that, depending on their masses, the simultaneous discovery of both the
Higgs boson and the heavy neutrinos is probable at early stages of LHC
operation. Results are presented for both Majorana and Dirac type fourth family
neutrinos.
|
[{'version': 'v1', 'created': 'Wed, 25 Jun 2008 08:16:19 GMT'}
{'version': 'v2', 'created': 'Thu, 31 Jul 2008 00:11:08 GMT'}
{'version': 'v3', 'created': 'Thu, 31 Jul 2008 21:17:13 GMT'}
{'version': 'v4', 'created': 'Fri, 3 Oct 2008 18:00:09 GMT'}]
|
2009-01-06
|
[array(['Cuhadar-Donszelmann', 'T.', ''], dtype=object)
array(['Unel', 'M. Karagoz', ''], dtype=object)
array(['Ozcan', 'V. E.', ''], dtype=object)
array(['Sultansoy', 'S.', ''], dtype=object)
array(['Unel', 'G.', ''], dtype=object)]
|
16,462 |
2212.09331
|
Dinghui Wang
|
Dinghui Wang, Huaiqiang Wang, Haijun Zhang
|
A Dirac-fermion approach and its application to design high Chern
numbers in magnetic topological insulator multilayers
|
11 pages, 4 figures
|
Phys. Rev. B 107, 155114(2023)
|
10.1103/PhysRevB.107.155114
| null |
cond-mat.mes-hall cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
Quantum anomalous Hall (QAH) insulators host topologically protected
dissipationless chiral edge states, the number of which is determined by its
Chern number. Up to now, the QAH state has been realized in a few magnetic
topological insulators, but usually with a low Chern number. Here, we develop a
Dirac-fermion approach which is valuable to understand and design high Chern
numbers in various multilayers of layered magnetic topological insulators.
Based on the Dirac-fermion approach, we demonstrate how to understand and tune
high Chern numbers in ferromagentic MnBi$_{2}$Te$_{4}$ films through the van
der Waals (vdW) gap modulation. Further, we also employ the Dirac-fermion
approach to understand the experimentally observed high Chern numbers and
topological phase transition from the Chern number $C=2$ to $C=1$ in the
[3QL-(Bi,Sb)$_{1.76}$Cr$_{0.24}$Te$_{3}$]/[4QL-(Bi,Sb)$_{2}$Te$_{3}$]
multilayers. Our work provides a powerful tool to design the QAH states with a
high Chern number in layered magnetic topological insulator multilayers.
|
[{'version': 'v1', 'created': 'Mon, 19 Dec 2022 09:50:46 GMT'}
{'version': 'v2', 'created': 'Tue, 3 Jan 2023 11:37:01 GMT'}]
|
2023-04-11
|
[array(['Wang', 'Dinghui', ''], dtype=object)
array(['Wang', 'Huaiqiang', ''], dtype=object)
array(['Zhang', 'Haijun', ''], dtype=object)]
|
16,463 |
1912.05721
|
Zhilong Wang
|
Yoon-Ho Choi, Peng Liu, Zitong Shang, Haizhou Wang, Zhilong Wang, Lan
Zhang, Junwei Zhou and Qingtian Zou
|
Using Deep Learning to Solve Computer Security Challenges: A Survey
|
43 pages with 7 figures and two tables
| null | null | null |
cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Although using machine learning techniques to solve computer security
challenges is not a new idea, the rapidly emerging Deep Learning technology has
recently triggered a substantial amount of interests in the computer security
community. This paper seeks to provide a dedicated review of the very recent
research works on using Deep Learning techniques to solve computer security
challenges. In particular, the review covers eight computer security problems
being solved by applications of Deep Learning: security-oriented program
analysis, defending return-oriented programming (ROP) attacks, achieving
control-flow integrity (CFI), defending network attacks, malware
classification, system-event-based anomaly detection, memory forensics, and
fuzzing for software security.
|
[{'version': 'v1', 'created': 'Thu, 12 Dec 2019 01:42:09 GMT'}
{'version': 'v2', 'created': 'Mon, 22 Feb 2021 21:46:33 GMT'}]
|
2021-02-24
|
[array(['Choi', 'Yoon-Ho', ''], dtype=object)
array(['Liu', 'Peng', ''], dtype=object)
array(['Shang', 'Zitong', ''], dtype=object)
array(['Wang', 'Haizhou', ''], dtype=object)
array(['Wang', 'Zhilong', ''], dtype=object)
array(['Zhang', 'Lan', ''], dtype=object)
array(['Zhou', 'Junwei', ''], dtype=object)
array(['Zou', 'Qingtian', ''], dtype=object)]
|
16,464 |
1208.2700
|
Joshua Erlich
|
Dylan Albrecht, Christopher D. Carone and Joshua Erlich
|
Deconstructing Superconductivity
|
24 pages, 10 eps figures. v2: Sign conventions clarified, references
added
| null |
10.1103/PhysRevD.86.086005
| null |
hep-th cond-mat.supr-con hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a dimensionally deconstructed model of an s-wave holographic
superconductor. The 2+1 dimensional model includes multiple charged Cooper pair
fields and neutral exciton fields that have interactions governed by hidden
local symmetries. We derive AdS/CFT-like relations for the current and charge
density in the model, and we analyze properties of the Cooper pair condensates
and the complex conductivity.
|
[{'version': 'v1', 'created': 'Mon, 13 Aug 2012 20:06:31 GMT'}
{'version': 'v2', 'created': 'Tue, 21 Aug 2012 19:54:16 GMT'}]
|
2013-05-30
|
[array(['Albrecht', 'Dylan', ''], dtype=object)
array(['Carone', 'Christopher D.', ''], dtype=object)
array(['Erlich', 'Joshua', ''], dtype=object)]
|
16,465 |
1802.05139
|
Sadamori Kojaku
|
Sadamori Kojaku, Giulio Cimini, Guido Caldarelli, Naoki Masuda
|
Structural changes in the interbank market across the financial crisis
from multiple core-periphery analysis
|
17 pages, 9 figures, 1 table
|
Journal of Network Theory in Finance 4(3), 33-51 (2018)
|
10.21314/JNTF.2018.044
| null |
q-fin.RM physics.soc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Interbank markets are often characterised in terms of a core-periphery
network structure, with a highly interconnected core of banks holding the
market together, and a periphery of banks connected mostly to the core but not
internally. This paradigm has recently been challenged for short time scales,
where interbank markets seem better characterised by a bipartite structure with
more core-periphery connections than inside the core. Using a novel
core-periphery detection method on the eMID interbank market, we enrich this
picture by showing that the network is actually characterised by multiple
core-periphery pairs. Moreover, a transition from core-periphery to bipartite
structures occurs by shortening the temporal scale of data aggregation. We
further show how the global financial crisis transformed the market, in terms
of composition, multiplicity and internal organisation of core-periphery pairs.
By unveiling such a fine-grained organisation and transformation of the
interbank market, our method can find important applications in the
understanding of how distress can propagate over financial networks.
|
[{'version': 'v1', 'created': 'Wed, 14 Feb 2018 15:01:02 GMT'}]
|
2018-09-18
|
[array(['Kojaku', 'Sadamori', ''], dtype=object)
array(['Cimini', 'Giulio', ''], dtype=object)
array(['Caldarelli', 'Guido', ''], dtype=object)
array(['Masuda', 'Naoki', ''], dtype=object)]
|
16,466 |
1904.13056
|
Or Meir
|
Arkadev Chattopadhyay, Yuval Filmus, Sajin Koroth, Or Meir and Toniann
Pitassi
|
Query-to-Communication Lifting Using Low-Discrepancy Gadgets
|
This work subsumes an earlier work that appears in ICALP 2019
| null | null | null |
cs.CC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Lifting theorems are theorems that relate the query complexity of a function
$f:\{0,1\}^{n}\to\{0,1\}$ to the communication complexity of the composed
function $f \circ g^{n}$, for some "gadget"
$g:\{0,1\}^{b}\times\{0,1\}^{b}\to\{0,1\}$. Such theorems allow transferring
lower bounds from query complexity to the communication complexity, and have
seen numerous applications in the recent years. In addition, such theorems can
be viewed as a strong generalization of a direct-sum theorem for the gadget
$g$.
We prove a new lifting theorem that works for all gadgets $g$ that have
logarithmic length and exponentially-small discrepancy, for both deterministic
and randomized communication complexity. Thus, we significantly increase the
range of gadgets for which such lifting theorems hold.
Our result has two main motivations: First, allowing a larger variety of
gadgets may support more applications. In particular, our work is the first to
prove a randomized lifting theorem for logarithmic-size gadgets, thus improving
some applications of the theorem. Second, our result can be seen as a strong
generalization of a direct-sum theorem for functions with low discrepancy.
|
[{'version': 'v1', 'created': 'Tue, 30 Apr 2019 05:43:27 GMT'}
{'version': 'v2', 'created': 'Tue, 13 Aug 2019 16:10:33 GMT'}
{'version': 'v3', 'created': 'Thu, 15 Aug 2019 23:03:12 GMT'}
{'version': 'v4', 'created': 'Tue, 5 Oct 2021 08:25:02 GMT'}]
|
2021-10-06
|
[array(['Chattopadhyay', 'Arkadev', ''], dtype=object)
array(['Filmus', 'Yuval', ''], dtype=object)
array(['Koroth', 'Sajin', ''], dtype=object)
array(['Meir', 'Or', ''], dtype=object)
array(['Pitassi', 'Toniann', ''], dtype=object)]
|
16,467 |
1702.07553
|
Susanne M\"uller
|
Susanne M\"uller
|
F-pure threshold and height of quasi-homogeneous polynomials
| null | null | null | null |
math.AG
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
We consider a quasi-homogeneous polynomial $f \in \mathbb{Z}[x_0, \ldots,
x_N]$ of degree $w$ equal to the degree of $x_0 \cdots x_N$ and show that the
$F$-pure threshold of the reduction $f_p \in \mathbb{F}_p[x_0, \ldots, x_N]$ is
equal to the log canonical threshold if and only if the height of the
Artin-Mazur formal group associated to $H^{N-1}\left( X, {\mathbb{G}}_{m,X}
\right)$, where $X$ is the hypersurface given by $f$, is equal to 1. We also
prove that a similar result holds for Fermat hypersurfaces of degree $>N+1$.
Furthermore, we give examples of weighted Delsarte surfaces which show that
other values of the $F$-pure threshold of a quasi-homogeneous polynomial of
degree $w$ cannot be characterized by the height.
|
[{'version': 'v1', 'created': 'Fri, 24 Feb 2017 12:14:47 GMT'}]
|
2017-02-27
|
[array(['Müller', 'Susanne', ''], dtype=object)]
|
16,468 |
1501.00684
|
Sergey Zelik V.
|
Vladimir Chepyzhov and Sergey Zelik
|
Infinite energy solutions for Dissipative Euler equations in R^2
|
arXiv admin note: text overlap with arXiv:1203.5733
| null |
10.1007/s00021-015-0213-x
| null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the Euler equations with the so-called Ekman damping in the whole 2D
space. The global well-posedness and dissipativity for the weak infinite energy
solutions of this problem in the uniformly local spaces is verified based on
the further development of the weighted energy theory for the Navier-Stokes and
Euler type problems. In addition, the existence of weak locally compact global
attractor is proved and some extra compactness of this attractor is obtained.
|
[{'version': 'v1', 'created': 'Sun, 4 Jan 2015 15:19:31 GMT'}]
|
2015-09-30
|
[array(['Chepyzhov', 'Vladimir', ''], dtype=object)
array(['Zelik', 'Sergey', ''], dtype=object)]
|
16,469 |
2007.11052
|
Mona Minakshi
|
Mona Minakshi, Pratool Bharti, Tanvir Bhuiyan, Sherzod Kariev, Sriram
Chellappan
|
A Framework based on Deep Neural Networks to Extract Anatomy of
Mosquitoes from Images
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We design a framework based on Mask Region-based Convolutional Neural Network
(Mask R-CNN) to automatically detect and separately extract anatomical
components of mosquitoes - thorax, wings, abdomen and legs from images. Our
training dataset consisted of 1500 smartphone images of nine mosquito species
trapped in Florida. In the proposed technique, the first step is to detect
anatomical components within a mosquito image. Then, we localize and classify
the extracted anatomical components, while simultaneously adding a branch in
the neural network architecture to segment pixels containing only the
anatomical components. Evaluation results are favorable. To evaluate
generality, we test our architecture trained only with mosquito images on
bumblebee images. We again reveal favorable results, particularly in extracting
wings. Our techniques in this paper have practical applications in public
health, taxonomy and citizen-science efforts.
|
[{'version': 'v1', 'created': 'Tue, 21 Jul 2020 19:27:46 GMT'}
{'version': 'v2', 'created': 'Wed, 29 Jul 2020 14:00:13 GMT'}]
|
2020-07-30
|
[array(['Minakshi', 'Mona', ''], dtype=object)
array(['Bharti', 'Pratool', ''], dtype=object)
array(['Bhuiyan', 'Tanvir', ''], dtype=object)
array(['Kariev', 'Sherzod', ''], dtype=object)
array(['Chellappan', 'Sriram', ''], dtype=object)]
|
16,470 |
math/0312500
|
Victor Bovdi
|
V.A. Bovdi, P.M. Gudivok, V.P. Rudko
|
Torsion-free crystallographic groups with indecomposable holonomy group
|
15 pages
| null | null | null |
math.GR math.RT
| null |
Let K be a principal ideal domain, G a finite group, and M a KG-module which
as K-module is free of finite rank, and on which $G$ acts faithfully. A
generalized crystallographic group (introduced by the authors in volume 5 of
Journal of Group Theory) is a group $\frak C$ which has a normal subgroup
isomorphic to M with quotient G, such that conjugation in $\frak C$ gives the
same action of G on M that we started with. (When $K=\Bbb Z$, these are just
the classical crystallographic groups.) The K-free rank of M is said to be the
dimension of $\frak C$, the holonomy group of $\frak C$ is G, and $\frak C$ is
called indecomposable if M is an indecomposable KG-module.
Let K be either $\Bbb Z$, or its localization $\Bbb Z_{(p)}$ at the prime p,
or the ring $\Bbb Z_p$ of p-adic integers, and consider indecomposable
torsionfree generalized crystallographic groups whose holonomy group is
noncyclic of order p^2. In Theorem 2, we prove that (for any given p) the
dimensions of these groups are not bounded.
For $K=\Bbb Z$, we show in Theorem 3 that there are infinitely many
non-isomorphic indecomposable torsionfree crystallographic groups with holonomy
group the alternating group of degree 4. In Theorem 1, we look at a cyclic G
whose order |G| satisfies the following condition: for all prime divisors p of
|G|, p^2 also divides G, and for at least one p, even p^3 does. We prove that
then every product of |G| with a positive integer coprime to it occurs as the
dimension of some indecomposable torsionfree crystallographic group with
holonomy group G.
|
[{'version': 'v1', 'created': 'Tue, 30 Dec 2003 10:31:27 GMT'}
{'version': 'v2', 'created': 'Mon, 5 Jan 2004 06:27:08 GMT'}]
|
2007-05-23
|
[array(['Bovdi', 'V. A.', ''], dtype=object)
array(['Gudivok', 'P. M.', ''], dtype=object)
array(['Rudko', 'V. P.', ''], dtype=object)]
|
16,471 |
1211.5895
|
Valeriy Timofeev P.
|
V. Yu. Monarkha, V. A. Pashchenko, and V. P. Timofeev
|
Low density flux pinning in YBCO single crystals
|
3 pages, 4 figures
| null | null | null |
cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Abricosov vortex and bundles dynamics was experimentally investigated in
Earth's magnetic field range. Isothermal relaxation features in YBCO single
crystal samples with strong pinning centers were studied for different
sample-field orientation. The normalized relaxation rate S obtained allowed to
estimate the effective pinning potential U in the bulk of the YBCO sample and
its temperature dependence, as well as the critical current density Jc. A
comparison between the data obtained and the results for similar measurements
in significantly higher magnetic fields was performed. To compare different Jc
measuring techniques magnetization loop M(H) measurements, were made. These
measurements provide many important parameters of the sample under study
(penetration field Hp, first critical field Hc1, etc.) that contain the
geometrical configuration of the samples.
|
[{'version': 'v1', 'created': 'Mon, 26 Nov 2012 09:14:58 GMT'}]
|
2012-11-27
|
[array(['Monarkha', 'V. Yu.', ''], dtype=object)
array(['Pashchenko', 'V. A.', ''], dtype=object)
array(['Timofeev', 'V. P.', ''], dtype=object)]
|
16,472 |
2106.07026
|
Zhicheng Cai
|
Zhicheng Cai, Kaizhu Huang, Chenglei Peng
|
Reborn Mechanism: Rethinking the Negative Phase Information Flow in
Convolutional Neural Network
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper proposes a novel nonlinear activation mechanism typically for
convolutional neural network (CNN), named as reborn mechanism. In sharp
contrast to ReLU which cuts off the negative phase value, the reborn mechanism
enjoys the capacity to reborn and reconstruct dead neurons. Compared to other
improved ReLU functions, reborn mechanism introduces a more proper way to
utilize the negative phase information. Extensive experiments validate that
this activation mechanism is able to enhance the model representation ability
more significantly and make the better use of the input data information while
maintaining the advantages of the original ReLU function. Moreover, reborn
mechanism enables a non-symmetry that is hardly achieved by traditional CNNs
and can act as a channel compensation method, offering competitive or even
better performance but with fewer learned parameters than traditional methods.
Reborn mechanism was tested on various benchmark datasets, all obtaining better
performance than previous nonlinear activation functions.
|
[{'version': 'v1', 'created': 'Sun, 13 Jun 2021 15:33:49 GMT'}
{'version': 'v2', 'created': 'Wed, 7 Jul 2021 17:37:09 GMT'}]
|
2021-07-08
|
[array(['Cai', 'Zhicheng', ''], dtype=object)
array(['Huang', 'Kaizhu', ''], dtype=object)
array(['Peng', 'Chenglei', ''], dtype=object)]
|
16,473 |
2008.12052
|
Junjie Huang
|
Zhibo Zou, Junjie Huang, Ping Luo
|
Compensation Tracker: Reprocessing Lost Object for Multi-Object Tracking
| null | null | null | null |
cs.CV eess.IV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Tracking by detection paradigm is one of the most popular object tracking
methods. However, it is very dependent on the performance of the detector. When
the detector has a behavior of missing detection, the tracking result will be
directly affected. In this paper, we analyze the phenomenon of the lost
tracking object in real-time tracking model on MOT2020 dataset. Based on simple
and traditional methods, we propose a compensation tracker to further alleviate
the lost tracking problem caused by missing detection. It consists of a motion
compensation module and an object selection module. The proposed method not
only can re-track missing tracking objects from lost objects, but also does not
require additional networks so as to maintain speed-accuracy trade-off of the
real-time model. Our method only needs to be embedded into the tracker to work
without re-training the network. Experiments show that the compensation tracker
can efficaciously improve the performance of the model and reduce identity
switches. With limited costs, the compensation tracker successfully enhances
the baseline tracking performance by a large margin and reaches 66% of MOTA and
67% of IDF1 on MOT2020 dataset.
|
[{'version': 'v1', 'created': 'Thu, 27 Aug 2020 10:59:54 GMT'}
{'version': 'v2', 'created': 'Mon, 31 Aug 2020 04:48:44 GMT'}
{'version': 'v3', 'created': 'Tue, 12 Jan 2021 13:29:01 GMT'}
{'version': 'v4', 'created': 'Sat, 5 Feb 2022 13:48:43 GMT'}]
|
2022-02-08
|
[array(['Zou', 'Zhibo', ''], dtype=object)
array(['Huang', 'Junjie', ''], dtype=object)
array(['Luo', 'Ping', ''], dtype=object)]
|
16,474 |
0809.3744
|
Diego Blas
|
D. Blas
|
Aspects of Infrared Modifications of Gravity
|
Ph.D. Thesis, 168 pages, 12 figures
| null | null | null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the first part of the thesis, and after an introduction to certain models
of modified gravity, we study consistent Lagrangians for Lorentz invariant
(massive and massless) spin-2 and spin-3/2 particles in flat space. The second
part of the dissertation is devoted to non-linear extensions for the spin-2
case, focusing on unimodular gravity and bigravity. Both theories lead to
modifications of General Relativity at large distances and we will study exact
solutions, causal structure of those solutions, and perturbation theory
(specially for the Lorentz breaking case). Some comments on quantization of
these theories can be found in an appendix.
|
[{'version': 'v1', 'created': 'Mon, 22 Sep 2008 18:12:03 GMT'}]
|
2008-09-23
|
[array(['Blas', 'D.', ''], dtype=object)]
|
16,475 |
1202.1143
|
Darran Milne
|
Darran F. Milne, and Natalia V. Korolkova
|
Composite Cluster States and Alternative Architectures for One- Way
Quantum Computation
|
arXiv admin note: text overlap with arXiv:1007.0403
| null |
10.1103/PhysRevA.85.032310
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a new architecture for the measurement-based quantum computation
model. The new design relies on small composite light-atom primary clusters.
These are then assembled into cluster arrays using ancillary light modes and
the actual computation is run on such a cellular cluster. We show how to create
the primary clusters, which are Gaussian cluster states composed of both light
and atomic modes. These are entangled via QND interactions and beamsplitters
and the scheme is well described within the continuous-variable covariance
matrix formalism.
|
[{'version': 'v1', 'created': 'Mon, 6 Feb 2012 14:13:22 GMT'}]
|
2015-06-04
|
[array(['Milne', 'Darran F.', ''], dtype=object)
array(['Korolkova', 'Natalia V.', ''], dtype=object)]
|
16,476 |
1608.03239
|
Asmita Bhandare
|
Asmita Bhandare, Andreas Breslau, and Susanne Pfalzner
|
Effects of inclined star-disk encounter on protoplanetary disk size
|
15 pages, 11 figures. Accepted for publication by Astronomy &
Astrophysics
|
A&A 594, A53 (2016)
|
10.1051/0004-6361/201628086
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Most, if not all, young stars are initially surrounded by protoplanetary
disks. Owing to the preferential formation of stars in stellar clusters, the
protoplanetary disks around these stars may potentially be affected by the
cluster environment. Various works have investigated the influence of stellar
fly-bys on disks, although many of them consider only the effects due to
parabolic, coplanar encounters often for equal-mass stars, which is only a very
special case. We perform numerical simulations to study the fate of
protoplanetary disks after the impact of parabolic star-disk encounter for the
less investigated case of inclined up to coplanar, retrograde encounters, which
is a much more common case. Here, we concentrate on the disk size after such
encounters because this limits the size of the potentially forming planetary
systems. In addition, with the possibilities that ALMA offers, now a direct
comparison to observations is possible. Covering a wide range of periastron
distances and mass ratios between the mass of the perturber and central star,
we find that despite the prograde, coplanar encounters having the strongest
effect on the disk size, inclined and even the least destructive retrograde
encounters mostly also have a considerable effect, especially for close
periastron passages. Interestingly, we find a nearly linear dependence of the
disk size on the orbital inclination for the prograde encounters, but not for
the retrograde case. We also determine the final orbital parameters of the
particles in the disk such as eccentricities, inclinations, and semi-major
axes. Using this information the presented study can be used to describe the
fate of disks and also that of planetary systems after inclined encounters.
|
[{'version': 'v1', 'created': 'Wed, 10 Aug 2016 17:07:32 GMT'}]
|
2016-10-18
|
[array(['Bhandare', 'Asmita', ''], dtype=object)
array(['Breslau', 'Andreas', ''], dtype=object)
array(['Pfalzner', 'Susanne', ''], dtype=object)]
|
16,477 |
quant-ph/0612061
|
Chao-Yang Pang
|
Chao-Yang Pang
|
Loading N-Dimensional Vector into Quantum Registers from Classical
Memory with O(logN) Steps
|
8 papges 3 figures
| null | null | null |
quant-ph
| null |
Vector is the general format of input data of most algorithms. Designing
unitary operation to load all information of vector into quantum registers of
quantum CPU from classical memory is called quantum loading scheme (QLS). QLS
assembles classical memory and quantum CPU as a whole computer, which will be
important for further quantum computation. We present a QLS based on path
interference with time complexity O(logN), while classical loading scheme has
time complexity O(N), that is the efficiency bottleneck of classical computer.
|
[{'version': 'v1', 'created': 'Fri, 8 Dec 2006 08:35:21 GMT'}
{'version': 'v2', 'created': 'Mon, 5 Feb 2007 09:50:09 GMT'}
{'version': 'v3', 'created': 'Mon, 4 Jun 2007 12:48:30 GMT'}]
|
2007-06-13
|
[array(['Pang', 'Chao-Yang', ''], dtype=object)]
|
16,478 |
1911.08663
|
Tamitake Itoh Dr.
|
Tamitake Itoh, Yuko S. Yamamoto, Takayuki Okamoto
|
Anti-crossing properties of strong coupling system of silver
nanoparticle dimers coated with thin dye molecular films analyzed by
classical electromagnetism
|
37 pages, 7 figures
|
J. Chem. Phys. 152, 054710 (2020)
|
10.1063/1.5133875
| null |
physics.optics cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The evidence of strong coupling between plasmons and molecular excitons for
plasmonic nanoparticle (NP) dimers exhibiting ultra-sensitive surface enhanced
resonant Raman scattering is the observation of anti-crossing in the coupled
resonance. However, it is not easy to experimentally tune plasmon resonance of
such dimers for the observation. In this work, we theoretically investigate the
anti-crossing properties of the dimers coated by the thin dye films with
thicknesses greater than 0.1 nm and gap distances larger than 1.2 nm according
to the principles of classical electromagnetism. The plasmon resonance spectra
of these dimers are strongly affected by their coupling with the exciton
resonance of dye molecules. A comparison of the film thickness dependences of
dimer spectral changes with those of silver ellipsoidal NPs indicates that the
dipole plasmons localized in the dimer gap are coupled with molecular excitons
of the film much stronger than the dipole plasmons of ellipsoidal NPs.
Furthermore, the anti-crossing of coupled resonances is investigated while
tuning plasmon resonance by changing the morphology and refractive index of the
surrounding medium. The spectral changes observed for ellipsoidal NPs clearly
exhibit anti-crossing properties; however, the anti-crossing behavior of dimers
is more complex due to the strong coupling of dipoles and higher order plasmons
with multiple molecular excitons. We find that the anti-crossing for dimers is
clearly confirmed by the refractive index dependence of coupled resonance.
|
[{'version': 'v1', 'created': 'Wed, 20 Nov 2019 01:49:41 GMT'}]
|
2020-02-06
|
[array(['Itoh', 'Tamitake', ''], dtype=object)
array(['Yamamoto', 'Yuko S.', ''], dtype=object)
array(['Okamoto', 'Takayuki', ''], dtype=object)]
|
16,479 |
1904.03562
|
Chi Ho Yuen
|
Spencer Backman, Francisco Santos, Chi Ho Yuen
|
Topological Bijections for Oriented Matroids
|
12 pages, 3 figures, accepted by FPSAC 2019
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In previous work by the first and third author with Matthew Baker, a family
of bijections between bases of a regular matroid and the Jacobian group of the
matroid was given. The core of the work is a geometric construction using
zonotopal tilings that produces bijections between the bases of a realizable
oriented matroid and the set of $(\sigma,\sigma^*)$-compatible orientations
with respect to some acyclic circuit (respectively, cocircuit) signature
$\sigma$ (respectively, $\sigma^*$). In this work, we extend this construction
to general oriented matroids and circuit (respectively, cocircuit) signatures
coming from generic single-element liftings (respectively, extensions). As a
corollary, when both signatures are induced by the same lexicographic data, we
give a new (bijective) proof of the interpretation of $T_M(1,1)$ using
orientation activity due to Gioan and Las Vergnas. Here $T_M(x,y)$ is the Tutte
polynomial of the matroid.
|
[{'version': 'v1', 'created': 'Sun, 7 Apr 2019 01:46:16 GMT'}]
|
2019-04-09
|
[array(['Backman', 'Spencer', ''], dtype=object)
array(['Santos', 'Francisco', ''], dtype=object)
array(['Yuen', 'Chi Ho', ''], dtype=object)]
|
16,480 |
2104.11900
|
Salvatore Daniele Tomarchio Ph.D
|
Salvatore D. Tomarchio, Paul D. McNicholas and Antonio Punzo
|
Matrix Normal Cluster-Weighted Models
| null | null | null | null |
stat.ME
|
http://creativecommons.org/licenses/by/4.0/
|
Finite mixtures of regressions with fixed covariates are a commonly used
model-based clustering methodology to deal with regression data. However, they
assume assignment independence, i.e. the allocation of data points to the
clusters is made independently of the distribution of the covariates. In order
to take into account the latter aspect, finite mixtures of regressions with
random covariates, also known as cluster-weighted models (CWMs), have been
proposed in the univariate and multivariate literature. In this paper, the CWM
is extended to matrix data, e.g. those data where a set of variables are
simultaneously observed at different time points or locations. Specifically,
the cluster-specific marginal distribution of the covariates, and the
cluster-specific conditional distribution of the responses given the
covariates, are assumed to be matrix normal. Maximum likelihood parameter
estimates are derived using an ECM algorithm. Parameter recovery,
classification assessment and the capability of the BIC to detect the
underlying groups are analyzed on simulated data. Finally, two real data
applications concerning educational indicators and the Italian non-life
insurance market are presented.
|
[{'version': 'v1', 'created': 'Sat, 24 Apr 2021 07:48:58 GMT'}]
|
2021-04-27
|
[array(['Tomarchio', 'Salvatore D.', ''], dtype=object)
array(['McNicholas', 'Paul D.', ''], dtype=object)
array(['Punzo', 'Antonio', ''], dtype=object)]
|
16,481 |
1706.00632
|
Thomas Carraro
|
Thomas Carraro, Simon D\"orsam, Stefan Frei and Daniel Schwarz
|
An adaptive Newton algorithm for optimal control problems with
application to optimal electrode design
| null | null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work we present an adaptive Newton-type method to solve nonlinear
constrained optimization problems in which the constraint is a system of
partial differential equations discretized by the finite element method. The
adaptive strategy is based on a goal-oriented a posteriori error estimation for
the discretization and for the iteration error. The iteration error stems from
an inexact solution of the nonlinear system of first order optimality
conditions by the Newton-type method. This strategy allows to balance the two
errors and to derive effective stopping criteria for the Newton-iterations. The
algorithm proceeds with the search of the optimal point on coarse grids which
are refined only if the discretization error becomes dominant. Using computable
error indicators the mesh is refined locally leading to a highly efficient
solution process. The performance of the algorithm is shown with several
examples and in particular with an application in the neurosciences: the
optimal electrode design for the study of neuronal networks.
|
[{'version': 'v1', 'created': 'Fri, 2 Jun 2017 11:16:26 GMT'}]
|
2017-06-05
|
[array(['Carraro', 'Thomas', ''], dtype=object)
array(['Dörsam', 'Simon', ''], dtype=object)
array(['Frei', 'Stefan', ''], dtype=object)
array(['Schwarz', 'Daniel', ''], dtype=object)]
|
16,482 |
1409.7592
|
Uta Naether
|
Uta Naether, Cristian Mej\'ia-Cort\'es, and Rodrigo A. Vicencio
|
Random dimer model in pseudo two-dimensional lattices
|
5 pages, 3 figures, submitted for publication
|
Phys. Lett. A 379, 988 (2015)
|
10.1016/j.physleta.2015.01.032
| null |
cond-mat.dis-nn physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we study long-time wave transport in correlated and
uncorrelated disordered 2D arrays. When a separation of dimensions is applied
to the model, we find that the predicted 1D random dimer phenomenology also
appears in so-called pseudo-2D arrays. Therefore, a threshold behavior is
observed in terms of the effective size for eigenmodes, as well as in long-time
dynam- ics. For this threshold behavior to be observed a minimum system size is
required, what is very important when considering a possible experimental
realization. For the long-time evolution, we find that for short-range
correlated lattices a super-diffusive long-range transport is observed, while
for completely uncorrelated disorder in 2D transport becomes sub-diffusive
within the localization length and random binary pseudo-2D arrays show
localization.
|
[{'version': 'v1', 'created': 'Fri, 26 Sep 2014 14:41:20 GMT'}]
|
2015-02-11
|
[array(['Naether', 'Uta', ''], dtype=object)
array(['Mejía-Cortés', 'Cristian', ''], dtype=object)
array(['Vicencio', 'Rodrigo A.', ''], dtype=object)]
|
16,483 |
1805.11485
|
Richard Szabo
|
Zoltan Kokenyesi, Annamaria Sinkovics, Richard J. Szabo
|
Double field theory for the A/B-models and topological S-duality in
generalized geometry
|
39 pages, 1 figure; v2: typos corrected, reference added
| null |
10.1002/prop.201800069
|
EMPG-18-11
|
hep-th math-ph math.DG math.MP math.QA math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study AKSZ-type BV constructions for the topological A- and B-models
within a double field theory formulation that incorporates backgrounds with
geometric and non-geometric fluxes. We relate them to a Courant sigma-model, on
an open membrane, corresponding to a generalized complex structure, which
reduces to the A- or B-models on the boundary. We introduce S-duality at the
level of the membrane sigma-model based on the generalized complex structure,
which exchanges the related AKSZ field theories, and interpret it as
topological S-duality of the A- and B-models. Our approach leads to new classes
of Courant algebroids associated to (generalized) complex geometry.
|
[{'version': 'v1', 'created': 'Tue, 29 May 2018 14:06:25 GMT'}
{'version': 'v2', 'created': 'Fri, 8 Jun 2018 11:28:59 GMT'}]
|
2018-12-05
|
[array(['Kokenyesi', 'Zoltan', ''], dtype=object)
array(['Sinkovics', 'Annamaria', ''], dtype=object)
array(['Szabo', 'Richard J.', ''], dtype=object)]
|
16,484 |
2211.00999
|
Christophe Chatelain
|
Christophe Chatelain (LPCT)
|
Finite-Size Scaling of the majority-voter model above the upper critical
dimension
|
To be published in Condensed Matter Physics
| null | null | null |
cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The majority-voter model is studied by Monte Carlo simulations on hypercubic
lattices of dimension $d=2$ to 7 with periodic boundary conditions. The
critical exponents associated to the Finite-Size Scaling of the magnetic
susceptibility are shown to be compatible with those of the Ising model. At
dimension $d=4$, the numerical data are compatible with the presence of
multiplicative logarithmic corrections. For $d\ge 5$,the estimates of the
exponents are close to the prediction $d/2$ when taking into account the
dangerous irrelevant variable at theGaussian fixed point. Moreover, the
universal values of the Binder cumulant are also compatible with those of the
Ising model. This indicates that the upper critical dimension of the
majority-voter model is not $d_c=6$ as claimed in the literature, but $d_c=4$
like the equilibrium Ising model.
|
[{'version': 'v1', 'created': 'Wed, 2 Nov 2022 10:00:16 GMT'}
{'version': 'v2', 'created': 'Fri, 6 Jan 2023 12:12:13 GMT'}]
|
2023-01-09
|
[array(['Chatelain', 'Christophe', '', 'LPCT'], dtype=object)]
|
16,485 |
hep-th/0107160
|
Alexander Nichols
|
I. I. Kogan, A. Nichols
|
SU(2)_0 and OSp(2|2)_{-2} WZNW models : Two current algebras, one
Logarithmic CFT
|
31 pages. Revised version
|
Int.J.Mod.Phys. A17 (2002) 2615
|
10.1142/S0217751X02009990
|
OUTP-01-38-P
|
hep-th cond-mat
| null |
We show that the SU(2)_0 WZNW model has a hidden OSp(2|2)_{-2} symmetry. Both
these theories are known to have logarithms in their correlation functions. We
also show that, like OSp(2|2)_{-2}, the logarithmic structure present in the
SU(2)_0 model is due to the underlying c=-2 sector. We also demonstrate that
the quantum Hamiltonian reduction of SU(2)_0 leads very directly to the
correlation functions of the c=-2 model. We also discuss some of the novel
boundary effects which can take place in this model.
|
[{'version': 'v1', 'created': 'Thu, 19 Jul 2001 17:12:28 GMT'}
{'version': 'v2', 'created': 'Sun, 21 Oct 2001 14:56:13 GMT'}]
|
2009-11-07
|
[array(['Kogan', 'I. I.', ''], dtype=object)
array(['Nichols', 'A.', ''], dtype=object)]
|
16,486 |
hep-ph/9906521
|
Jorge Crispim Romao
|
J. C. Romao
|
Yukawa Unification on the Bilinear R-Parity model
|
8 pages, 4 Figures in Postscript. Talk given at European Network
Meeting on Physics Beyond the Standard Model, Trieste, Italy, 24-27 Feb 1999.
To appear in the JHEP
| null | null |
FISIST/9-99/CFIF
|
hep-ph
| null |
We discuss gauge and Yukawa unification in the context of a supersymmetric
model with bilinear R-parity violation. We show that this model allows $b-\tau$
Yukawa unification for any value of $\tan\beta$ while satisfying perturbativity
of the couplings. We also find the $t-b-\tau$ Yukawa unification easier to
achieve than in the MSSM, occurring in a wider high $\tan\beta$ region. Finaly,
we also discuss the compatibility between the predicted and the measured values
for $\alpha_s(M_Z)$
|
[{'version': 'v1', 'created': 'Mon, 28 Jun 1999 11:37:41 GMT'}]
|
2007-05-23
|
[array(['Romao', 'J. C.', ''], dtype=object)]
|
16,487 |
cond-mat/0009088
|
Nikos Stefanakis
|
N. Stefanakis, N. Flytzanis
|
Critical currents in Josephson junctions with macroscopic defects
|
17 pages with 16 figures, submitted to Supercond. Sci. Technol
|
Supercond. Sci. Technol. 14 (2001) 16-29
|
10.1088/0953-2048/14/1/304
| null |
cond-mat.supr-con
| null |
The critical currents in Josephson junctions of conventional superconductors
with macroscopic defects are calculated for different defect critical current
densities as a function of the magnetic field. We also study the evolution of
the different modes with the defect position, at zero external field. We study
the stability of the solutions and derive simple arguments, that could help the
defect characterization. In most cases a reentrant behavior is seen, where both
a maximum and a minimum current exist.
|
[{'version': 'v1', 'created': 'Wed, 6 Sep 2000 14:54:20 GMT'}]
|
2009-10-31
|
[array(['Stefanakis', 'N.', ''], dtype=object)
array(['Flytzanis', 'N.', ''], dtype=object)]
|
16,488 |
1603.03840
|
Anton Evseev
|
Anton Evseev, Alexander Kleshchev
|
Turner doubles and generalized Schur algebras
|
39 pages
| null | null | null |
math.RT math.RA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Turner's Conjecture describes all blocks of symmetric groups and Hecke
algebras up to derived equivalence in terms of certain double algebras. With a
view towards a proof of this conjecture, we develop a general theory of Turner
doubles. In particular, we describe doubles as explicit maximal symmetric
subalgebras of certain generalized Schur algebras and establish a Schur-Weyl
duality with wreath product algebras.
|
[{'version': 'v1', 'created': 'Sat, 12 Mar 2016 01:41:39 GMT'}]
|
2016-03-15
|
[array(['Evseev', 'Anton', ''], dtype=object)
array(['Kleshchev', 'Alexander', ''], dtype=object)]
|
16,489 |
hep-th/9802112
|
Heinrich Saller
|
Heinrich Saller (MPI f. Physik)
|
The Central Correlations of Hypercharge, Isospin, Colour and Chirality
in the Standard Model
|
18 pages, latex, macros included
|
Nuovo Cim. A111 (1998) 1375-1392
|
10.1007/BF03036001
|
MPI-PTh/98-14
|
hep-th
| null |
The correlation of the fractionally represented hypercharge group with the
isospin and colour group in the standard model determines as faithfully
represented internal group the quotient group
${\U(1)\x\SU(2)\x\SU(3)\over\Z_2\x\Z_3}$. The discrete cyclic central
abelian-nonabelian internal correlation involved is considered with respect to
its consequences for the representations by the standard model fields, the
electroweak mixing angle and the symmetry breakdown. There exists a further
discrete $\Z_2$-correlation between chirality and Lorentz properties and also a
continuous $\U(1)$-external-internal one between hyperisospin and chirality.
|
[{'version': 'v1', 'created': 'Mon, 16 Feb 1998 12:04:04 GMT'}]
|
2009-10-31
|
[array(['Saller', 'Heinrich', '', 'MPI f. Physik'], dtype=object)]
|
16,490 |
2007.05107
|
Hendrik Weerts
|
Hendrik Weerts
|
Physics Letters B publications from 1967 to 2020. An analysis of the WEB
page content of PLB
| null | null | null | null |
cs.DL physics.hist-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Having been an editor for Physics Letters B (PLB) for many years I became
interested in the history of publishing, especially in particle physics (HEP).
Since PLB goes back to 1967 and an index of all PLB publications is available
online, this information was used to look at the history of PLB publications
over time. It should be noted that PLB publishes new results in particle
physics or high energy physics, nuclear physics and also in astrophysics and
cosmology. This is the start of an effort to look at all publishers that
publish research from HEP.
|
[{'version': 'v1', 'created': 'Thu, 9 Jul 2020 23:47:20 GMT'}]
|
2020-07-13
|
[array(['Weerts', 'Hendrik', ''], dtype=object)]
|
16,491 |
2104.00703
|
Caio Bastos de Senna Nascimento
|
Caio Bastos de Senna Nascimento
|
Generalized Boltzmann hierarchy for massive neutrinos in cosmology
|
12 pages, 10 figures. Matching prd accepted version
|
Phys. Rev. D 104, 083535 (2021)
|
10.1103/PhysRevD.104.083535
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Boltzmann solvers are an important tool for the computation of cosmological
observables in the linear regime. In the presence of massive neutrinos, they
involve solving the Boltzmann equation followed by an integration in momentum
space to arrive at the desired fluid properties, a procedure which is known to
be computationally slow. In this work we introduce the so-called generalized
Boltzmann hierarchy (GBH) for massive neutrinos in cosmology, an alternative to
the usual Boltzmann hierarchy, where the momentum dependence is integrated out
leaving us with a two-parameter infinite set of ordinary differential
equations. Along with the usual expansion in multipoles, there is now also an
expansion in higher velocity weight integrals of the distribution function.
Using a toy code, we show that the GBH produces the density contrast neutrino
transfer function to a $\lesssim 0.5\%$ accuracy at both large and intermediate
scales compared to the neutrino free-streaming scale, thus providing a
proof-of-principle for the GBH. We comment on the implementation of the GBH in
a state of the art Boltzmann solver.
|
[{'version': 'v1', 'created': 'Thu, 1 Apr 2021 18:15:14 GMT'}
{'version': 'v2', 'created': 'Fri, 19 Nov 2021 02:17:04 GMT'}]
|
2021-11-22
|
[array(['Nascimento', 'Caio Bastos de Senna', ''], dtype=object)]
|
16,492 |
2001.06090
|
Douglas Galvao
|
Levi C. Felix, Cristiano F. Woellner, and Douglas S. Galvao
|
Carbon Schwarzites Behavior Under Ballistic Impacts
| null | null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Schwarzites are 3D crystalline porous materials exhibiting the shape of
Triply Periodic Minimal Surfaces (TPMS). They possess negative Gaussian
curvature, created by the presence of rings with more than six sp2-hybridized
carbon atoms. Recently, new routes to their synthesis have been proposed. Due
to its foam-like structure, schwarzites are interesting for mechanical energy
absorption applications. In this work, we investigate through fully atomistic
reactive molecular dynamics the mechanical response under ballistic impacts of
four structures from primitive (P) and gyroid (G) families (two structures
within each family). The two structures in the same family differ mainly by the
ratio of hexagons to octagons, where this ratio increases the 'flatness' of the
structures. Although the penetration depth values are higher in the 'flatter'
structures (P8bal and G8bal), the absorbed kinetic energy by them is
considerably higher, which yields them a better energy-absorption performance.
|
[{'version': 'v1', 'created': 'Thu, 16 Jan 2020 21:54:52 GMT'}]
|
2020-01-20
|
[array(['Felix', 'Levi C.', ''], dtype=object)
array(['Woellner', 'Cristiano F.', ''], dtype=object)
array(['Galvao', 'Douglas S.', ''], dtype=object)]
|
16,493 |
1902.05227
|
David T. Limmer PhD
|
Addison J. Schile and David T. Limmer
|
Rate constants in spatially inhomogeneous systems
|
5 pages 2 Figures; Small revisions, to appear in JCP 2019
| null |
10.1063/1.5092837
| null |
cond-mat.stat-mech physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a theory and accompanying importance sampling method for computing
rate constants in spatially inhomogenious systems. Using the relationship
between rate constants and path space partition functions, we illustrate that
the relative change in the rate of a rare event through space is isomorphic to
the calculation of a free energy difference, albeit in a trajectory ensemble.
Like equilibrium free energies, relative rate constants can be estimated by
importance sampling. An extension to transition path sampling is proposed that
combines biased path ensembles and weighted histogram analysis to accomplish
this estimate. We show that rate constants can also be decomposed into
different contributions, including relative changes in stability, barrier
height and flux. This decomposition provides a means of interpretation and
insight into rare processes in complex environments. We verify these ideas with
a simple model of diffusion with spatially varying diffusivity and illustrate
their utility in an atomistic model of ion pair dissociation near an
electrochemical interface.
|
[{'version': 'v1', 'created': 'Thu, 14 Feb 2019 05:34:56 GMT'}
{'version': 'v2', 'created': 'Wed, 15 May 2019 16:55:21 GMT'}]
|
2019-06-05
|
[array(['Schile', 'Addison J.', ''], dtype=object)
array(['Limmer', 'David T.', ''], dtype=object)]
|
16,494 |
2210.10058
|
Max Jaarsma
|
Hao Chen, Max Jaarsma, Yibei Li, Ian Moult, Wouter J. Waalewijn, Hua
Xing Zhu
|
Multi-Collinear Splitting Kernels for Track Function Evolution
|
69 pages, 12 figures, 3 tables, 1 Mathematica notebook
| null | null | null |
hep-ph hep-ex nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Jets and their substructure play a central role in many analyses at the Large
Hadron Collider (LHC). To improve the precision of measurements, as well as to
enable measurement of jet substructure at increasingly small angular scales,
tracking information is often used due to its superior angular resolution and
robustness to pile-up. Calculations of track-based observables involve
non-perturbative track functions, that absorb infrared divergences in
perturbative calculations and describe the transition to charged hadrons. The
infrared divergences are directly related to the renormalization group
evolution (RGE), and can be systematically computed in perturbation theory.
Unlike the standard DGLAP evolution, the RGE of the track functions is
non-linear, encoding correlations in the fragmentation process. We compute the
next-to-leading order (NLO) evolution of the track functions, which involves in
its kernel the full $1\rightarrow3$ splitting function. We discuss in detail
how how we implement the evolution equation numerically, and illustrate the
size of the NLO corrections. We also show that our equation can be viewed as a
master equation for collinear evolution at NLO, by illustrating that by
integrating out specific terms, one can derive the evolution for any $N$-hadron
fragmentation function. Our results provide a crucial ingredient for obtaining
track-based predictions for generic measurements at the LHC, and for improving
the description of the collinear dynamics of jets.
|
[{'version': 'v1', 'created': 'Tue, 18 Oct 2022 18:00:00 GMT'}]
|
2022-10-20
|
[array(['Chen', 'Hao', ''], dtype=object)
array(['Jaarsma', 'Max', ''], dtype=object)
array(['Li', 'Yibei', ''], dtype=object)
array(['Moult', 'Ian', ''], dtype=object)
array(['Waalewijn', 'Wouter J.', ''], dtype=object)
array(['Zhu', 'Hua Xing', ''], dtype=object)]
|
16,495 |
2209.15380
|
Tanguy Lefort
|
Tanguy Lefort and Benjamin Charlier and Alexis Joly and Joseph Salmon
|
Identify ambiguous tasks combining crowdsourced labels by weighting
Areas Under the Margin
| null | null | null | null |
cs.LG cs.HC stat.ML
|
http://creativecommons.org/licenses/by/4.0/
|
In supervised learning - for instance in image classification - modern
massive datasets are commonly labeled by a crowd of workers. The obtained
labels in this crowdsourcing setting are then aggregated for training. The
aggregation step generally leverages a per-worker trust score. Yet, such
worker-centric approaches discard each task's ambiguity. Some intrinsically
ambiguous tasks might even fool expert workers, which could eventually be
harmful to the learning step. In a standard supervised learning setting - with
one label per task - the Area Under the Margin (AUM) is tailored to identify
mislabeled data. We adapt the AUM to identify ambiguous tasks in crowdsourced
learning scenarios, introducing the Weighted AUM (WAUM). The WAUM is an average
of AUMs weighted by task-dependent scores. We show that the WAUM can help
discard ambiguous tasks from the training set, leading to better generalization
or calibration performance. We report improvements over existing strategies for
learning a crowd, both for simulated settings and for the CIFAR-10H, LabelMe
and Music crowdsourced datasets.
|
[{'version': 'v1', 'created': 'Fri, 30 Sep 2022 11:16:20 GMT'}
{'version': 'v2', 'created': 'Wed, 8 Feb 2023 12:54:17 GMT'}]
|
2023-02-09
|
[array(['Lefort', 'Tanguy', ''], dtype=object)
array(['Charlier', 'Benjamin', ''], dtype=object)
array(['Joly', 'Alexis', ''], dtype=object)
array(['Salmon', 'Joseph', ''], dtype=object)]
|
16,496 |
cond-mat/0009122
|
Mai Suan Li
|
Mai Suan Li and Daniel Dominguez
|
AC resistivity of d-wave ceramic superconductors
|
7 eps figures, Phys. Rev. B (in press)
|
Phys. Rev. B 62, 14554 (2000)
|
10.1103/PhysRevB.62.14554
| null |
cond-mat.dis-nn cond-mat.supr-con
| null |
We model d-wave ceramic superconductors with a three-dimensional lattice of
randomly distributed $\pi$ Josephson junctions with finite self-inductance. The
linear and nonlinear ac resistivity of the d-wave ceramic superconductors is
obtained as function of temperature by solving the corresponding Langevin
dynamical equations. We find that the linear ac resistivity remains finite at
the temperature $T_p$ where the third harmonics of resistivity has a peak. The
current amplitude dependence of the nonlinear resistivity at the peak position
is found to be a power law. These results agree qualitatively with experiments.
We also show that the peak of the nonlinear resistivity is related to the onset
of the paramagnetic Meissner effect which occurs at the crossover temperature
$T_p$, which is above the chiral glass transition temperature $T_{cg}$.
|
[{'version': 'v1', 'created': 'Fri, 8 Sep 2000 07:22:54 GMT'}]
|
2009-10-31
|
[array(['Li', 'Mai Suan', ''], dtype=object)
array(['Dominguez', 'Daniel', ''], dtype=object)]
|
16,497 |
1607.02232
|
EPTCS
|
Alessandro Aldini (University of Urbino, Italy)
|
A Formal Framework for Modeling Trust and Reputation in Collective
Adaptive Systems
|
In Proceedings FORECAST 2016, arXiv:1607.02001
|
EPTCS 217, 2016, pp. 19-30
|
10.4204/EPTCS.217.4
| null |
cs.LO cs.MA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Trust and reputation models for distributed, collaborative systems have been
studied and applied in several domains, in order to stimulate cooperation while
preventing selfish and malicious behaviors. Nonetheless, such models have
received less attention in the process of specifying and analyzing formally the
functionalities of the systems mentioned above. The objective of this paper is
to define a process algebraic framework for the modeling of systems that use
(i) trust and reputation to govern the interactions among nodes, and (ii)
communication models characterized by a high level of adaptiveness and
flexibility. Hence, we propose a formalism for verifying, through model
checking techniques, the robustness of these systems with respect to the
typical attacks conducted against webs of trust.
|
[{'version': 'v1', 'created': 'Fri, 8 Jul 2016 05:36:08 GMT'}]
|
2016-07-11
|
[array(['Aldini', 'Alessandro', '', 'University of Urbino, Italy'],
dtype=object) ]
|
16,498 |
2201.05820
|
Menglin Wang
|
Menglin Wang, Jiachen Li, Baisheng Lai, Xiaojin Gong, Xian-Sheng Hua
|
Offline-Online Associated Camera-Aware Proxies for Unsupervised Person
Re-identification
|
Accepted to TIP
| null |
10.1109/TIP.2022.3213193
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, unsupervised person re-identification (Re-ID) has received
increasing research attention due to its potential for label-free applications.
A promising way to address unsupervised Re-ID is clustering-based, which
generates pseudo labels by clustering and uses the pseudo labels to train a
Re-ID model iteratively. However, most clustering-based methods take each
cluster as a pseudo identity class, neglecting the intra-cluster variance
mainly caused by the change of cameras. To address this issue, we propose to
split each single cluster into multiple proxies according to camera views. The
camera-aware proxies explicitly capture local structures within clusters, by
which the intra-ID variance and inter-ID similarity can be better tackled.
Assisted with the camera-aware proxies, we design two proxy-level contrastive
learning losses that are, respectively, based on offline and online association
results. The offline association directly associates proxies according to the
clustering and splitting results, while the online strategy dynamically
associates proxies in terms of up-to-date features to reduce the noise caused
by the delayed update of pseudo labels. The combination of two losses enables
us to train a desirable Re-ID model. Extensive experiments on three person
Re-ID datasets and one vehicle Re-ID dataset show that our proposed approach
demonstrates competitive performance with state-of-the-art methods. Code will
be available at: https://github.com/Terminator8758/O2CAP.
|
[{'version': 'v1', 'created': 'Sat, 15 Jan 2022 10:12:03 GMT'}
{'version': 'v2', 'created': 'Sat, 1 Oct 2022 15:05:17 GMT'}]
|
2022-11-23
|
[array(['Wang', 'Menglin', ''], dtype=object)
array(['Li', 'Jiachen', ''], dtype=object)
array(['Lai', 'Baisheng', ''], dtype=object)
array(['Gong', 'Xiaojin', ''], dtype=object)
array(['Hua', 'Xian-Sheng', ''], dtype=object)]
|
16,499 |
math/0406001
|
Sebastian Ruiz Martin
|
Sebastian Martin Ruiz
|
A new formula for the nth prime
|
3 pages
|
Smarandace Notions Journal Vol. 15 2005
| null | null |
math.GM
| null |
Formula for the nth prime using elementary arithmetical functions based in a
previous formula changing the characteristic function of prime numbers.
|
[{'version': 'v1', 'created': 'Mon, 31 May 2004 20:56:07 GMT'}]
|
2007-05-23
|
[array(['Ruiz', 'Sebastian Martin', ''], dtype=object)]
|
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