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|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2,700 |
quant-ph/0306087
|
Joshua Wilkie
|
Joshua Wilkie
|
Mean field master equation for self-interacting baths: comparison with
exact spin--spin-bath dynamics
|
16 pages, 4 figures
| null | null | null |
quant-ph
| null |
A mean field approximation is employed to derive a master equation suitable
for self-interacting baths and strong system-bath coupling. Solutions of the
master equation are compared with exact solutions for a central spin
interacting with a spin-bath.
|
[{'version': 'v1', 'created': 'Thu, 12 Jun 2003 20:00:48 GMT'}]
|
2007-05-23
|
[array(['Wilkie', 'Joshua', ''], dtype=object)]
|
2,701 |
2208.02366
|
Thomas Beechem
|
Isaac Ruiz, Gyorgy Vizkelethy, Anthony E. McDonald, Stephen W. Howell,
Paul M. Thelen, Michael D. Goldflam, Thomas E. Beechem
|
Detection of High Energy Ionizing Radiation using Deeply Depleted
Graphene-Oxide-Semiconductor Junctions
|
15 pages, 4 figures
| null |
10.1063/5.0118098
| null |
cond-mat.mtrl-sci cond-mat.mes-hall
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Graphene's linear bandstructure and two-dimensional density of states provide
an implicit advantage for sensing charge. Here, these advantages are leveraged
in a deeply depleted graphene-oxide-semiconductor (D2GOS) junction detector
architecture to sense carriers created by ionizing radiation. Specifically, the
room temperature response of the silicon-based D2GOS junction is analyzed
during irradiation with 20 MeV Si4+ ions. Detection was demonstrated for doses
ranging from 12-1200 ions with device functionality maintained with no
substantive degradation. To understand the device response, D2GOS pixels were
characterized post-irradiation via a combination of electrical
characterization, Raman spectroscopy, and photocurrent mapping. This combined
characterization methodology underscores the lack of discernible damage caused
by irradiation to the graphene while highlighting the nature of interactions
between the incident ions and the silicon absorber.
|
[{'version': 'v1', 'created': 'Wed, 3 Aug 2022 22:24:17 GMT'}]
|
2022-11-23
|
[array(['Ruiz', 'Isaac', ''], dtype=object)
array(['Vizkelethy', 'Gyorgy', ''], dtype=object)
array(['McDonald', 'Anthony E.', ''], dtype=object)
array(['Howell', 'Stephen W.', ''], dtype=object)
array(['Thelen', 'Paul M.', ''], dtype=object)
array(['Goldflam', 'Michael D.', ''], dtype=object)
array(['Beechem', 'Thomas E.', ''], dtype=object)]
|
2,702 |
quant-ph/0506107
|
Jan Bouda
|
Jan Bouda and Mario Ziman
|
Limits and restrictions of private quantum channel
|
23 pages, submitted to QI&C
| null | null | null |
quant-ph
| null |
We study private quantum channels on a single qubit, which encrypt given set
of plaintext states $P$. Specifically, we determine all achievable states
$\rho^{(0)}$ (average output of encryption) and for each particular set $P$ we
determine the entropy of the key necessary and sufficient to encrypt this set.
It turns out that single bit of key is sufficient when the set $P$ is two
dimensional. However, the necessary and sufficient entropy of the key in case
of three dimensional $P$ varies continuously between 1 and 2 bits depending on
the state $\rho^{(0)}$. Finally, we derive private quantum channels achieving
these bounds. We show that the impossibility of universal NOT operation on
qubit can be derived from the fact that one bit of key is not sufficient to
encrypt qubit.
|
[{'version': 'v1', 'created': 'Tue, 14 Jun 2005 13:14:36 GMT'}]
|
2007-05-23
|
[array(['Bouda', 'Jan', ''], dtype=object)
array(['Ziman', 'Mario', ''], dtype=object)]
|
2,703 |
hep-th/0411025
|
Rong-Gen Cai
|
Rong-Gen Cai, Anzhong Wang
|
Cosmology with Interaction between Phantom Dark Energy and Dark Matter
and the Coincidence Problem
|
Latex, 17 pages including 14 figures, minor changes
|
JCAP 0503 (2005) 002
|
10.1088/1475-7516/2005/03/002
| null |
hep-th astro-ph gr-qc
| null |
We study a cosmological model in which phantom dark energy is coupled to dark
matter by phenomenologically introducing a coupled term to the equations of
motion of dark energy and dark matter. This term is parameterized by a
dimensionless coupling function $\delta$, Hubble parameter and the energy
density of dark matter, and it describes an energy flow between the dark energy
and dark matter. We discuss two cases: one is the case where the
equation-of-state $\omega_e$ of the dark energy is a constant; the other is
that the dimensionless coupling function $\delta$ is a constant. We investigate
the effect of the interaction on the evolution of the universe, the total
lifetime of the universe, and the ratio of the period when the universe is in
the coincidence state to its total lifetime. It turns out that the interaction
will produce significant deviation from the case without the interaction.
|
[{'version': 'v1', 'created': 'Tue, 2 Nov 2004 01:46:29 GMT'}
{'version': 'v2', 'created': 'Tue, 9 Nov 2004 14:10:12 GMT'}
{'version': 'v3', 'created': 'Tue, 9 Nov 2004 21:01:02 GMT'}
{'version': 'v4', 'created': 'Sat, 8 Jan 2005 00:55:32 GMT'}]
|
2009-11-10
|
[array(['Cai', 'Rong-Gen', ''], dtype=object)
array(['Wang', 'Anzhong', ''], dtype=object)]
|
2,704 |
2102.10397
|
Laila Loudiki
|
Laila Loudiki, Mustapha Kchikech and El Hassan Essaky
|
Diameter of generalized Petersen graphs
| null | null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Due to their broad application to different fields of theory and practice,
generalized Petersen graphs $GPG(n,s)$ have been extensively investigated.
Despite the regularity of generalized Petersen graphs, determining an exact
formula for the diameter is still a difficult problem. In their paper, Beenker
and Van Lint have proved that if the circulant graph $C_n(1,s)$ has diameter
$d$, then $GPG(n,s)$ has diameter at least $d+1$ and at most $d+2$. In this
paper, we provide necessary and sufficient conditions so that the diameter of
$GPG(n,s)$ is equal to $d+1,$ and sufficient conditions so that the diameter of
$GPG(n,s)$ is equal to $d+2.$ Afterwards, we give exact values for the diameter
of $GPG(n,s)$ for almost all cases of $n$ and $s.$ Furthermore, we show that
there exists an algorithm computing the diameter of generalized Petersen graphs
with running time $O$(log$n$).
|
[{'version': 'v1', 'created': 'Sat, 20 Feb 2021 17:33:59 GMT'}]
|
2021-02-23
|
[array(['Loudiki', 'Laila', ''], dtype=object)
array(['Kchikech', 'Mustapha', ''], dtype=object)
array(['Essaky', 'El Hassan', ''], dtype=object)]
|
2,705 |
1210.2031
|
Yuanlong Xin
|
J. Jost, Y. L. Xin and Ling Yang
|
Curvature estimates for minimal submanifolds of higher codimension and
small G-rank
|
25 pages
| null | null | null |
math.DG
|
http://creativecommons.org/licenses/by/3.0/
|
We obtain new curvature estimates and Bernstein type results for minimal
$n-$submanifolds in $\ir{n+m},\, m\ge 2$ under the condition that the rank of
its Gauss map is at most 2. In particular, this applies to minimal surfaces in
Euclidean spaces of arbitrary codimension.
|
[{'version': 'v1', 'created': 'Sun, 7 Oct 2012 07:03:57 GMT'}
{'version': 'v2', 'created': 'Thu, 8 Nov 2012 05:09:16 GMT'}]
|
2012-11-09
|
[array(['Jost', 'J.', ''], dtype=object)
array(['Xin', 'Y. L.', ''], dtype=object)
array(['Yang', 'Ling', ''], dtype=object)]
|
2,706 |
1512.08129
|
Shun Kawakami
|
Shun Kawakami, Toshihiko Sasaki and Masato Koashi
|
Security of differential quadrature phase shift quantum key distribution
|
Citation of the Fig.1 in the text corrected
|
Phys. Rev. A 94, 022332 (2016)
|
10.1103/PhysRevA.94.022332
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
One of the simplest methods for implementing quantum key distribution over
fiber-optic communication is the Bennett-Brassard 1984 protocol with phase
encoding (PE-BB84 protocol), in which the sender uses phase modulation over
double pulses from a laser and the receiver uses a passive delayed
interferometer. Using essentially the same setup and by regarding a train of
many pulses as a single block, one can carry out the so-called differential
quadrature phase shift (DQPS) protocol, which is a variant of differential
phase shift (DPS) protocols. Here we prove the security of the DQPS protocol
based on an adaptation of proof techniques for the BB84 protocol, which
inherits the advantages arising from the simplicity of the protocol, such as
accommodating the use of threshold detectors and simple off-line calibration
methods for the light source. We show that the secure key rate of the DQPS
protocol in the proof is eight thirds as high as the rate of the PE-BB84
protocol.
|
[{'version': 'v1', 'created': 'Sat, 26 Dec 2015 18:17:10 GMT'}
{'version': 'v2', 'created': 'Sun, 3 Jan 2016 23:37:36 GMT'}]
|
2016-08-31
|
[array(['Kawakami', 'Shun', ''], dtype=object)
array(['Sasaki', 'Toshihiko', ''], dtype=object)
array(['Koashi', 'Masato', ''], dtype=object)]
|
2,707 |
1002.0233
|
Anoush Aghajani-Talesh
|
Anoush Aghajani-Talesh, Markus Falkenau, Valentin V. Volchkov, Leah E.
Trafford, Tilman Pfau and Axel Griesmaier
|
Laser cooling of a magnetically guided ultra cold atom beam
|
9 pages, 4 figures
| null |
10.1088/1367-2630/12/6/065018
| null |
cond-mat.quant-gas physics.atom-ph quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report on the transverse laser cooling of a magnetically guided beam of
ultra cold chromium atoms. Radial compression by a tapering of the guide is
employed to adiabatically heat the beam. Inside the tapered section heat is
extracted from the atom beam by a two-dimensional optical molasses
perpendicular to it, resulting in a significant increase of atomic phase space
density. A magnetic offset field is applied to prevent optical pumping to
untrapped states. Our results demonstrate that by a suitable choice of the
magnetic offset field, the cooling beam intensity and detuning, atom losses and
longitudinal heating can be avoided. Final temperatures below 65 microkelvin
have been achieved, corresponding to an increase of phase space density in the
guided beam by more than a factor of 30.
|
[{'version': 'v1', 'created': 'Mon, 1 Feb 2010 12:01:52 GMT'}]
|
2015-05-18
|
[array(['Aghajani-Talesh', 'Anoush', ''], dtype=object)
array(['Falkenau', 'Markus', ''], dtype=object)
array(['Volchkov', 'Valentin V.', ''], dtype=object)
array(['Trafford', 'Leah E.', ''], dtype=object)
array(['Pfau', 'Tilman', ''], dtype=object)
array(['Griesmaier', 'Axel', ''], dtype=object)]
|
2,708 |
2110.06543
|
Helena Cuesta
|
Adria Mallol-Ragolta and Helena Cuesta and Emilia G\'omez and Bj\"orn
W. Schuller
|
EIHW-MTG DiCOVA 2021 Challenge System Report
| null | null | null | null |
cs.SD cs.LG eess.AS
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
This paper aims to automatically detect COVID-19 patients by analysing the
acoustic information embedded in coughs. COVID-19 affects the respiratory
system, and, consequently, respiratory-related signals have the potential to
contain salient information for the task at hand. We focus on analysing the
spectrogram representations of coughing samples with the aim to investigate
whether COVID-19 alters the frequency content of these signals. Furthermore,
this work also assesses the impact of gender in the automatic detection of
COVID-19. To extract deep learnt representations of the spectrograms, we
compare the performance of a cough-specific, and a Resnet18 pre-trained
Convolutional Neural Network (CNN). Additionally, our approach explores the use
of contextual attention, so the model can learn to highlight the most relevant
deep learnt features extracted by the CNN. We conduct our experiments on the
dataset released for the Cough Sound Track of the DiCOVA 2021 Challenge. The
best performance on the test set is obtained using the Resnet18 pre-trained CNN
with contextual attention, which scored an Area Under the Curve (AUC) of 70.91
at 80% sensitivity.
|
[{'version': 'v1', 'created': 'Wed, 13 Oct 2021 07:38:54 GMT'}]
|
2021-10-14
|
[array(['Mallol-Ragolta', 'Adria', ''], dtype=object)
array(['Cuesta', 'Helena', ''], dtype=object)
array(['Gómez', 'Emilia', ''], dtype=object)
array(['Schuller', 'Björn W.', ''], dtype=object)]
|
2,709 |
2212.07623
|
Yuanzhi Cai Mr.
|
Yuanzhi Cai, Lei Fan, and Yuan Fang
|
SBSS: Stacking-Based Semantic Segmentation Framework for Very High
Resolution Remote Sensing Image
|
14 pages
|
IEEE Transactions on Geoscience and Remote Sensing, 2023
|
10.1109/TGRS.2023.3234549
| null |
cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
Semantic segmentation of Very High Resolution (VHR) remote sensing images is
a fundamental task for many applications. However, large variations in the
scales of objects in those VHR images pose a challenge for performing accurate
semantic segmentation. Existing semantic segmentation networks are able to
analyse an input image at up to four resizing scales, but this may be
insufficient given the diversity of object scales. Therefore, Multi Scale (MS)
test-time data augmentation is often used in practice to obtain more accurate
segmentation results, which makes equal use of the segmentation results
obtained at the different resizing scales. However, it was found in this study
that different classes of objects had their preferred resizing scale for more
accurate semantic segmentation. Based on this behaviour, a Stacking-Based
Semantic Segmentation (SBSS) framework is proposed to improve the segmentation
results by learning this behaviour, which contains a learnable Error Correction
Module (ECM) for segmentation result fusion and an Error Correction Scheme
(ECS) for computational complexity control. Two ECS, i.e., ECS-MS and ECS-SS,
are proposed and investigated in this study. The Floating-point operations
(Flops) required for ECS-MS and ECS-SS are similar to the commonly used MS test
and the Single-Scale (SS) test, respectively. Extensive experiments on four
datasets (i.e., Cityscapes, UAVid, LoveDA and Potsdam) show that SBSS is an
effective and flexible framework. It achieved higher accuracy than MS when
using ECS-MS, and similar accuracy as SS with a quarter of the memory footprint
when using ECS-SS.
|
[{'version': 'v1', 'created': 'Thu, 15 Dec 2022 05:43:21 GMT'}]
|
2023-05-02
|
[array(['Cai', 'Yuanzhi', ''], dtype=object)
array(['Fan', 'Lei', ''], dtype=object)
array(['Fang', 'Yuan', ''], dtype=object)]
|
2,710 |
2211.15406
|
Alberto Testolin Dr.
|
Burla Nur Korkmaz, Roee Diamant, Gil Danino, Alberto Testolin
|
Automated Detection of Dolphin Whistles with Convolutional Networks and
Transfer Learning
| null | null | null | null |
cs.SD cs.CV cs.LG eess.AS
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Effective conservation of maritime environments and wildlife management of
endangered species require the implementation of efficient, accurate and
scalable solutions for environmental monitoring. Ecoacoustics offers the
advantages of non-invasive, long-duration sampling of environmental sounds and
has the potential to become the reference tool for biodiversity surveying.
However, the analysis and interpretation of acoustic data is a time-consuming
process that often requires a great amount of human supervision. This issue
might be tackled by exploiting modern techniques for automatic audio signal
analysis, which have recently achieved impressive performance thanks to the
advances in deep learning research. In this paper we show that convolutional
neural networks can indeed significantly outperform traditional automatic
methods in a challenging detection task: identification of dolphin whistles
from underwater audio recordings. The proposed system can detect signals even
in the presence of ambient noise, at the same time consistently reducing the
likelihood of producing false positives and false negatives. Our results
further support the adoption of artificial intelligence technology to improve
the automatic monitoring of marine ecosystems.
|
[{'version': 'v1', 'created': 'Mon, 28 Nov 2022 15:06:46 GMT'}]
|
2022-11-29
|
[array(['Korkmaz', 'Burla Nur', ''], dtype=object)
array(['Diamant', 'Roee', ''], dtype=object)
array(['Danino', 'Gil', ''], dtype=object)
array(['Testolin', 'Alberto', ''], dtype=object)]
|
2,711 |
1403.5886
|
Hans Boehringer
|
Hans B\"ohringer, Gayoung Chon, Chris A. Collins, Luigi Guzzo, Nina
Nowak, Sergei Bobrovskyi
|
The extended ROSAT-ESO Flux Limited X-ray Galaxy Cluster Survey (REFLEX
II)\\ II. Construction and Properties of the Survey
|
Astronomy and Astrophysics Vol. 555, A30 - 15 pages, 20 figures
| null |
10.1051/0004-6361/201220722
| null |
astro-ph.CO astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Galaxy clusters provide unique laboratories to study astrophysical processes
on large scales and are important probes for cosmology. X-ray observations are
currently the best means of detecting and characterizing galaxy clusters. In
this paper we describe the construction of the REFLEX II galaxy cluster survey
based on the southern part of the ROSAT All-Sky Survey. REFLEX II extends the
REFLEX I survey by a factor of about two down to a flux limit of $1.8 \times
10^{-12}$ erg s$^{-1}$ cm$^{-2}$ (0.1 - 2.4 keV). We describe the determination
of the X-ray parameters, the process of X-ray source identification, and the
construction of the survey selection function. The REFLEX II cluster sample
comprises currently 915 objects. A standard selection function is derived for a
lower source count limit of 20 photons in addition to the flux limit. The
median redshift of the sample is $z = 0.102$. Internal consistency checks and
the comparison to several other galaxy cluster surveys imply that REFLEX II is
better than 90\% complete with a contamination less than 10\%.
|
[{'version': 'v1', 'created': 'Mon, 24 Mar 2014 09:35:34 GMT'}]
|
2017-03-15
|
[array(['Böhringer', 'Hans', ''], dtype=object)
array(['Chon', 'Gayoung', ''], dtype=object)
array(['Collins', 'Chris A.', ''], dtype=object)
array(['Guzzo', 'Luigi', ''], dtype=object)
array(['Nowak', 'Nina', ''], dtype=object)
array(['Bobrovskyi', 'Sergei', ''], dtype=object)]
|
2,712 |
2211.11307
|
Anna Chiara Lai
|
Anna Chiara Lai and Paola Loreti
|
Optimal expansions of Kakeya sequences
| null | null | null | null |
math.NT
|
http://creativecommons.org/licenses/by/4.0/
|
We investigate optimal expansions of Kakeya sequences for the representation
of real numbers. Expansions of Kakeya sequences generalize the expansions in
non-integer bases and they display analogous redundancy phenomena. In this
paper, we characterize optimal expansions of Kakeya sequences, and we provide
conditions for the existence of unique expansions with respect to Kakeya
sequences.
|
[{'version': 'v1', 'created': 'Mon, 21 Nov 2022 09:46:05 GMT'}]
|
2022-11-22
|
[array(['Lai', 'Anna Chiara', ''], dtype=object)
array(['Loreti', 'Paola', ''], dtype=object)]
|
2,713 |
2210.06448
|
Kenta Takatsu
|
Kenta Takatsu, Ted Westling
|
Debiased inference for a covariate-adjusted regression function
| null | null | null | null |
stat.ME
|
http://creativecommons.org/licenses/by/4.0/
|
In this article, we study nonparametric inference for a covariate-adjusted
regression function. This parameter captures the average association between a
continuous exposure and an outcome after adjusting for other covariates. In
particular, under certain causal conditions, this parameter corresponds to the
average outcome had all units been assigned to a specific exposure level, known
as the causal dose-response curve. We propose a debiased local linear estimator
of the covariate-adjusted regression function, and demonstrate that our
estimator converges pointwise to a mean-zero normal limit distribution. We use
this result to construct asymptotically valid confidence intervals for function
values and differences thereof. In addition, we use approximation results for
the distribution of the supremum of an empirical process to construct
asymptotically valid uniform confidence bands. Our methods do not require
undersmoothing, permit the use of data-adaptive estimators of nuisance
functions, and our estimator attains the optimal rate of convergence for a
twice differentiable function. We illustrate the practical performance of our
estimator using numerical studies and an analysis of the effect of air
pollution exposure on cardiovascular mortality.
|
[{'version': 'v1', 'created': 'Wed, 12 Oct 2022 17:52:13 GMT'}
{'version': 'v2', 'created': 'Fri, 20 Jan 2023 21:40:20 GMT'}]
|
2023-01-24
|
[array(['Takatsu', 'Kenta', ''], dtype=object)
array(['Westling', 'Ted', ''], dtype=object)]
|
2,714 |
2003.07364
|
Alireza Vafaei Sadr
|
A. Vafaei Sadr, S. M. S. Movahed
|
Clustering of Local Extrema in Planck CMB maps
|
17 pages, 7 figures, and 3 tables. Including major revision and
matched to the accepted version that appeared in MNRAS
| null |
10.1093/mnras/stab368
| null |
astro-ph.CO astro-ph.HE astro-ph.IM stat.AP stat.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The clustering of local extrema will be exploited to examine Gaussianity,
asymmetry, and the footprint of the cosmic-string network on the CMB observed
by Planck. The number density of local extrema ($n_{\rm pk}$ for peak and
$n_{\rm tr}$ for trough) and sharp clipping ($n_{\rm pix}$) statistics support
the Gaussianity hypothesis for all component separations. However, the pixel at
the threshold reveals a more consistent treatment with respect to end-to-end
simulations. A very tiny deviation from associated simulations in the context
of trough density, in the threshold range $\theta\in [-2-0]$ for NILC and CR
component separations, are detected. The unweighted two-point correlation
function, of the local extrema, illustrates good consistency between different
component separations and corresponding Gaussian simulations for almost all
available thresholds. However, for high thresholds, a small deficit in the
clustering of peaks is observed with respect to the Planck fiducial
$\Lambda$CDM model. To put a significant constraint on the amplitude of the
mass function based on the value of $\Psi$ around the Doppler peak
($\theta\approx 70-75$ arcmin), we should consider $\vartheta\lesssim 0.0$. The
scale-independent bias factors for the peak above a threshold for large
separation angle and high threshold level are in agreement with the value
expected for a pure Gaussian CMB. Applying the $n_{\rm pk}$, $n_{\rm tr}$,
$\Psi_{\rm pk-pk}$ and $\Psi_{\rm tr-tr}$ measures on the tessellated CMB map
with patches of $7.5^2$ deg$^2$ size prove statistical isotropy in the Planck
maps. The peak clustering analysis puts the upper bound on the cosmic-string
tension, $G\mu^{(\rm up)} \lesssim 5.59\times 10^{-7}$, in SMICA.
|
[{'version': 'v1', 'created': 'Mon, 16 Mar 2020 18:00:01 GMT'}
{'version': 'v2', 'created': 'Sun, 11 Apr 2021 10:37:40 GMT'}
{'version': 'v3', 'created': 'Thu, 22 Apr 2021 09:18:07 GMT'}]
|
2021-04-23
|
[array(['Sadr', 'A. Vafaei', ''], dtype=object)
array(['Movahed', 'S. M. S.', ''], dtype=object)]
|
2,715 |
hep-ph/0012361
|
Pierre Sikivie
|
C. Hagmann (LLNL), S. Chang (Purdue U), P. Sikivie (U of Florida)
|
Axion Radiation from Strings
|
29 pages, 10 figures
|
Phys.Rev. D63 (2001) 125018
|
10.1103/PhysRevD.63.125018
|
UFIFT-HEP-00-33
|
hep-ph astro-ph
| null |
This paper revisits the problem of the string decay contribution to the axion
cosmological energy density. We show that this contribution is proportional to
the average relative increase when axion strings decay of a certain quantity
$N_{\rm ax}$ which we define. We carry out numerical simulations of the
evolution and decay of circular and non-circular string loops, of bent strings
with ends held fixed, and of vortex-antivortex pairs in two dimensions. In the
case of string loops and of vortex-antivortex pairs, $N_{\rm ax}$ decreases by
approximately 20%. In the case of bent strings, $N_{\rm ax}$ remains constant
or increases slightly. Our results imply that the string decay contribution to
the axion energy density is of the same order of magnitude as the
well-understood contribution from vacuum realignment.
|
[{'version': 'v1', 'created': 'Thu, 28 Dec 2000 16:12:55 GMT'}]
|
2009-10-31
|
[array(['Hagmann', 'C.', '', 'LLNL'], dtype=object)
array(['Chang', 'S.', '', 'Purdue U'], dtype=object)
array(['Sikivie', 'P.', '', 'U of Florida'], dtype=object)]
|
2,716 |
1807.02592
|
Marissa Walker
|
Marissa Walker, Alfonso F. Agnew, Jeffrey Bidler, Andrew Lundgren,
Alexandra Macedo, Duncan Macleod, T.J. Massinger, Oliver Patane, and Joshua
R. Smith
|
Identifying correlations between LIGO's astronomical range and auxiliary
sensors using lasso regression
| null | null |
10.1088/1361-6382/aae593
| null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The range to which the Laser Interferometer Gravitational-Wave Observatory
(LIGO) can observe astrophysical systems varies over time, limited by noise in
the instruments and their environments. Identifying and removing the sources of
noise that limit LIGO's range enables higher signal-to-noise observations and
increases the number of observations. The LIGO observatories are continuously
monitored by hundreds of thousands of auxiliary channels that may contain
information about these noise sources. This paper describes an algorithm that
uses linear regression, namely lasso (least absolute shrinkage and selection
operator) regression, to analyze all of these channels and identify a small
subset of them that can be used to reconstruct variations in LIGO's
astrophysical range. Exemplary results of the application of this method to
three different periods of LIGO Livingston data are presented, along with
computational performance and current limitations.
|
[{'version': 'v1', 'created': 'Sat, 7 Jul 2018 00:17:43 GMT'}
{'version': 'v2', 'created': 'Tue, 23 Oct 2018 23:52:36 GMT'}]
|
2018-10-25
|
[array(['Walker', 'Marissa', ''], dtype=object)
array(['Agnew', 'Alfonso F.', ''], dtype=object)
array(['Bidler', 'Jeffrey', ''], dtype=object)
array(['Lundgren', 'Andrew', ''], dtype=object)
array(['Macedo', 'Alexandra', ''], dtype=object)
array(['Macleod', 'Duncan', ''], dtype=object)
array(['Massinger', 'T. J.', ''], dtype=object)
array(['Patane', 'Oliver', ''], dtype=object)
array(['Smith', 'Joshua R.', ''], dtype=object)]
|
2,717 |
astro-ph/0607191
|
Alex Golovin
|
Amjad Al-Sawad, Jarmo Torsti, Hannu Hoffren, Kari Lehtomaki
|
An Interactive Program for Correlative Studies of Solar Energetic
Particle Events
|
Published in Proceedings of the 13th Young Scientists' Conference on
Astronomy and Space Physics, held in Kyiv, Ukraine, April 25-29, 2006, Eds.:
Golovin, A.; Ivashchenko, G.; Simon, A
| null | null | null |
astro-ph
| null |
We have developed an interactive program which shows the solar energetic
particle (SEP) intensity-time profile as observed by SOHO/ERNE, simultaneously
with the associated coronal mass ejection in optical imaging movies taken by
LASCO coronagraph, soft X-ray by YOHKOH, ultraviolet by EIT, DH radio emission
by WAVE/Wind, and the H$\alpha$ location for the solar flare and spectral radio
emission from the journal of geophysical data. The whole set of data will
provide increased scientific knowledge on the solar energetic particle events
and the solar phenomena associated with them, because in this program one can
see easily the temporal associations of each phenomenon during the evolution of
the particle intensity. The (SEP) intensity-time profile will give a clear view
to detect the velocity dispersion in the events, if it exists. The ERNE data
are commented in order to follow of phenomena associated with changes of the
intensity-time profiles. We introduce this set of data as an index for the
ERNE/SOHO solar energetic particle events. The interactive program is applied
for statistical, correlative study of SEP events observed on board SOHO.
|
[{'version': 'v1', 'created': 'Mon, 10 Jul 2006 14:39:25 GMT'}]
|
2007-05-23
|
[array(['Al-Sawad', 'Amjad', ''], dtype=object)
array(['Torsti', 'Jarmo', ''], dtype=object)
array(['Hoffren', 'Hannu', ''], dtype=object)
array(['Lehtomaki', 'Kari', ''], dtype=object)]
|
2,718 |
cond-mat/0103102
|
Edward G. Timoshenko
|
E.G. Timoshenko, Yu.A. Kuznetsov
|
Equilibrium and kinetics at the coil-to-globule transition of star and
comb heteropolymers in infinitely dilute solutions
|
RevTeX, 5 pages, 10 PS figures. Accepted for publication in Colloids
and Surfaces A
| null | null | null |
cond-mat.soft cond-mat.mes-hall cond-mat.stat-mech
| null |
By means of continuous space Monte Carlo simulation we study conformational
structures formed by star and comb heteropolymers during kinetics of folding
from the coil to the globule, as well as the corresponding equilibrium states
on going from the good to the poor solution. Particular examples of combs with
hydrophobic backbone and hydrophilic side-groups (and vice versa), as well as
stars with flexible and semi-stiff arms are studied. It is interesting to note
that star-like conformations naturally appear for a comb polymer with a
strongly hydrophobic backbone. We emphasise the crucial difference in the
spatial distribution of hydrophobic and hydrophilic monomers within the
globular states for the above mentioned two types of combs. In case of stars,
the non-equilibrium states during kinetics of the coil-to-globule transition
correspond to formation of localised pearls within flexible arms, whereas
semi-stiff arms prefer to join with each other remaining essentially extended.
These studies present natural extension of our previous works on the
equilibrium and kinetic properties of linear and ring heteropolymers based on
the Gaussian self-consistent method and lattice Monte Carlo technique. However,
in studying polymers with more nontrivial topology continuous space simulation
has some essential advantages.
|
[{'version': 'v1', 'created': 'Mon, 5 Mar 2001 13:32:20 GMT'}]
|
2007-05-23
|
[array(['Timoshenko', 'E. G.', ''], dtype=object)
array(['Kuznetsov', 'Yu. A.', ''], dtype=object)]
|
2,719 |
2208.01388
|
B. Subhash
|
Georgy C. Luke, B. Subhash
|
Homology and Cohomology of Topological Quandles
| null | null | null | null |
math.GT math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A homology and cohomology theory for topological quandles are introduced. The
relation between these (co)homology groups and quandle (co)homology groups are
studied. The 1 - topological quandle cocycles are used to compute state sum
invariants corresponding to knot diagrams.
|
[{'version': 'v1', 'created': 'Tue, 2 Aug 2022 12:10:51 GMT'}]
|
2022-08-03
|
[array(['Luke', 'Georgy C.', ''], dtype=object)
array(['Subhash', 'B.', ''], dtype=object)]
|
2,720 |
1412.8603
|
Oliver Goodbourn
|
Oliver Goodbourn
|
Reductive pairs arising from representations
|
Twelve pages, no figures. More detail is available in the author's
PhD thesis
| null | null | null |
math.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let G be a reductive algebraic group and V a G-module. We consider the
question of when (GL(V), rho(G)) is a reductive pair of algebraic groups, where
rho is the representation afforded by V. We first make some observations about
general G and V, then specialise to the group SL2(K) with K algebraically
closed of positive characteristic p. For this group we provide complete answers
for the classes of simple and Weyl modules, the behaviour being determined by
the base p expansion of the highest weight of the module. We conclude by
illustrating some of the results from the first section with examples for the
group SL3(K).
|
[{'version': 'v1', 'created': 'Tue, 30 Dec 2014 11:23:31 GMT'}]
|
2014-12-31
|
[array(['Goodbourn', 'Oliver', ''], dtype=object)]
|
2,721 |
1507.04121
|
Jan Leike
|
Jan Leike and Marcus Hutter
|
Solomonoff Induction Violates Nicod's Criterion
|
ALT 2015
| null | null | null |
cs.LG cs.AI math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Nicod's criterion states that observing a black raven is evidence for the
hypothesis H that all ravens are black. We show that Solomonoff induction does
not satisfy Nicod's criterion: there are time steps in which observing black
ravens decreases the belief in H. Moreover, while observing any computable
infinite string compatible with H, the belief in H decreases infinitely often
when using the unnormalized Solomonoff prior, but only finitely often when
using the normalized Solomonoff prior. We argue that the fault is not with
Solomonoff induction; instead we should reject Nicod's criterion.
|
[{'version': 'v1', 'created': 'Wed, 15 Jul 2015 08:37:52 GMT'}]
|
2015-10-20
|
[array(['Leike', 'Jan', ''], dtype=object)
array(['Hutter', 'Marcus', ''], dtype=object)]
|
2,722 |
1708.07279
|
Jie Yang
|
Jie Yang, Zhiyang Teng, Meishan Zhang, and Yue Zhang
|
Combining Discrete and Neural Features for Sequence Labeling
|
Accepted by International Conference on Computational Linguistics and
Intelligent Text Processing (CICLing) 2016, April
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Neural network models have recently received heated research attention in the
natural language processing community. Compared with traditional models with
discrete features, neural models have two main advantages. First, they take
low-dimensional, real-valued embedding vectors as inputs, which can be trained
over large raw data, thereby addressing the issue of feature sparsity in
discrete models. Second, deep neural networks can be used to automatically
combine input features, and including non-local features that capture semantic
patterns that cannot be expressed using discrete indicator features. As a
result, neural network models have achieved competitive accuracies compared
with the best discrete models for a range of NLP tasks.
On the other hand, manual feature templates have been carefully investigated
for most NLP tasks over decades and typically cover the most useful indicator
pattern for solving the problems. Such information can be complementary the
features automatically induced from neural networks, and therefore combining
discrete and neural features can potentially lead to better accuracy compared
with models that leverage discrete or neural features only.
In this paper, we systematically investigate the effect of discrete and
neural feature combination for a range of fundamental NLP tasks based on
sequence labeling, including word segmentation, POS tagging and named entity
recognition for Chinese and English, respectively. Our results on standard
benchmarks show that state-of-the-art neural models can give accuracies
comparable to the best discrete models in the literature for most tasks and
combing discrete and neural features unanimously yield better results.
|
[{'version': 'v1', 'created': 'Thu, 24 Aug 2017 05:24:26 GMT'}]
|
2017-08-25
|
[array(['Yang', 'Jie', ''], dtype=object)
array(['Teng', 'Zhiyang', ''], dtype=object)
array(['Zhang', 'Meishan', ''], dtype=object)
array(['Zhang', 'Yue', ''], dtype=object)]
|
2,723 |
hep-ph/9409462
|
Sharon Jensen
|
Stanley J. Brodsky (SLAC) and Hung Lung Lu (University of Maryland)
|
Commensurate Scale Relations: Precise Tests of Quantum Chromodynamics
without Scale or Scheme Ambiguity
|
14 pages, SLAC-PUB-6683, uses RevTeX 3.0
| null | null | null |
hep-ph
| null |
We derive commensurate scale relations which relate perturbatively calculable
QCD observables to each other, including the annihilation ratio, the heavy
quark potential, tau decay, and radiative corrections to structure function sum
rules. The ratio of scales $Q_A/Q_B$ is unique at leading order and guarantees
that the observables A and B pass through new quark thresholds at the same
physical scale. In higher orders a different renormalization scale $Q^{n*}$ is
assigned for each order n in the perturbative series such that the coefficients
of the series are identical to that of a conformally invariant theory. QCD can
thus be tested in a new and precise way by checking that the effective charges
of observables track both in their relative normalization and in their
commensurate scale dependence. The commensurate scale relations which relate
the radiative corrections to the annihilation ratio to the radiative
corrections for the Bjorken and Gross-Llewellyn Smith sum rules provides the
generalization of the Crewther relation to non-conformal gauge theory.
|
[{'version': 'v1', 'created': 'Sat, 1 Oct 1994 00:51:00 GMT'}]
|
2007-05-23
|
[array(['Brodsky', 'Stanley J.', '', 'SLAC'], dtype=object)
array(['Lu', 'Hung Lung', '', 'University of Maryland'], dtype=object)]
|
2,724 |
1911.03453
|
Victor Goncalves
|
V. P. Goncalves, G. Sampaio dos Santos, C. R. Sena
|
Exclusive heavy quark photoproduction in $pp$, $pPb$ and $PbPb$
collisions at the LHC and FCC energies
|
9 pages, 6 figures, 2 tables. Improved version published in Nuclear
Physics A
| null |
10.1016/j.nuclphysa.2020.121862
| null |
hep-ph hep-ex nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we present a comprehensive analysis of the exclusive heavy
quark photoproduction in $pp$, $pPb$ and $PbPb$ collisions at LHC and FCC
energies using the color dipole formalism and taking into account of nonlinear
corrections to the QCD dynamics. We estimate the rapidity distributions and
cross sections for the charm and bottom production considering three
phenomenological models for the dipole-proton scattering amplitude that are
able to describe the $ep$ HERA data. Our results indicate that a future
experimental analysis of this process is feasible, which will allow us to
improve our understanding of the QCD dynamics.
|
[{'version': 'v1', 'created': 'Thu, 7 Nov 2019 11:51:40 GMT'}
{'version': 'v2', 'created': 'Wed, 13 May 2020 15:16:17 GMT'}]
|
2020-05-20
|
[array(['Goncalves', 'V. P.', ''], dtype=object)
array(['Santos', 'G. Sampaio dos', ''], dtype=object)
array(['Sena', 'C. R.', ''], dtype=object)]
|
2,725 |
1704.05551
|
Petr Ro\v{c}kai
|
Petr Ro\v{c}kai and Ji\v{r}\'i Barnat
|
A Simulator for LLVM Bitcode
| null | null | null | null |
cs.SE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we introduce an interactive simulator for programs in the form
of LLVM bitcode. The main features of the simulator include precise control
over thread scheduling, automatic checkpoints and reverse stepping, support for
source-level information about functions and variables in C and C++ programs
and structured heap visualisation. Additionally, the simulator is compatible
with DiVM (DIVINE VM) hypercalls, which makes it possible to load, simulate and
analyse counterexamples from an existing model checker.
|
[{'version': 'v1', 'created': 'Tue, 18 Apr 2017 22:23:16 GMT'}
{'version': 'v2', 'created': 'Tue, 9 Jul 2019 07:00:54 GMT'}]
|
2019-07-10
|
[array(['Ročkai', 'Petr', ''], dtype=object)
array(['Barnat', 'Jiří', ''], dtype=object)]
|
2,726 |
1606.00922
|
Nikita Zhivotovskiy
|
Nikita Zhivotovskiy and Steve Hanneke
|
Localization of VC Classes: Beyond Local Rademacher Complexities
|
28 pages, accepted version
| null | null | null |
math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we introduce an alternative localization approach for binary
classification that leads to a novel complexity measure: fixed points of the
local empirical entropy. We show that this complexity measure gives a tight
control over complexity in the upper bounds. Our results are accompanied by a
novel minimax lower bound that involves the same quantity. In particular, we
practically answer the question of optimality of ERM under bounded noise for
general VC classes.
|
[{'version': 'v1', 'created': 'Thu, 2 Jun 2016 22:16:20 GMT'}
{'version': 'v2', 'created': 'Mon, 1 Aug 2016 09:32:40 GMT'}
{'version': 'v3', 'created': 'Sun, 17 Dec 2017 21:39:27 GMT'}]
|
2017-12-19
|
[array(['Zhivotovskiy', 'Nikita', ''], dtype=object)
array(['Hanneke', 'Steve', ''], dtype=object)]
|
2,727 |
2010.05306
|
Elina Robeva
|
Yiheng Liu, Elina Robeva, and Huanqing Wang
|
Learning Linear Non-Gaussian Graphical Models with Multidirected Edges
| null | null | null | null |
cs.LG math.ST stat.ML stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we propose a new method to learn the underlying acyclic mixed
graph of a linear non-Gaussian structural equation model given observational
data. We build on an algorithm proposed by Wang and Drton, and we show that one
can augment the hidden variable structure of the recovered model by learning
{\em multidirected edges} rather than only directed and bidirected ones.
Multidirected edges appear when more than two of the observed variables have a
hidden common cause. We detect the presence of such hidden causes by looking at
higher order cumulants and exploiting the multi-trek rule. Our method recovers
the correct structure when the underlying graph is a bow-free acyclic mixed
graph with potential multi-directed edges.
|
[{'version': 'v1', 'created': 'Sun, 11 Oct 2020 18:10:15 GMT'}]
|
2020-10-13
|
[array(['Liu', 'Yiheng', ''], dtype=object)
array(['Robeva', 'Elina', ''], dtype=object)
array(['Wang', 'Huanqing', ''], dtype=object)]
|
2,728 |
1209.1929
|
Stefano Nicotri
|
Stefano Nicotri
|
Anomalous $AV^*V$ vertex in the soft-wall holographic model of QCD
|
4 pages, contribution to conference "QCD 12", 16th International
Conference in Quantum ChromoDynamics, 2nd-6th july 2012 (Montpellier -
France)
| null |
10.1016/j.nuclphysbps.2012.12.035
|
BARI-TH/660-12
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the vertex function of two vector and one axial-vector operators
in the soft-wall holographic model of QCD. When one of the two vector currents
represents an on-shell soft photon, such a vertex is described by two structure
functions $w_L$ and $w_T$, which are usually calculated through triangular loop
diagrams. We evaluate these functions in the soft-wall model of holographic QCD
(HQCD) and compare the outcome to the QCD findings.
|
[{'version': 'v1', 'created': 'Mon, 10 Sep 2012 10:14:10 GMT'}]
|
2015-06-11
|
[array(['Nicotri', 'Stefano', ''], dtype=object)]
|
2,729 |
1003.0061
|
Xavier Garcia i Tormo
|
Geoffrey T. Bodwin (Argonne), Xavier Garcia i Tormo (Argonne & Alberta
U.), Jungil Lee (Korea U.)
|
Factorization in exclusive quarkonium production
|
69 pages, 12 figures, 2 tables. v2: Version published in Physical
Review D
|
Phys.Rev.D81:114014,2010
|
10.1103/PhysRevD.81.114014
|
ANL-HEP-PR-09-97, Alberta Thy 15-09
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present factorization theorems for two exclusive heavy-quarkonium
production processes: production of two quarkonia in e^+e^- annihilation and
production of a quarkonium and a light meson in B-meson decays. We describe the
general proofs of factorization and supplement them with explicit one-loop
analyses, which illustrate some of the features of the soft-gluon
cancellations. We find that violations of factorization are generally
suppressed relative to the factorized contributions by a factor v^2m_c/Q for
each S-wave charmonium and a factor m_c/Q for each L-wave charmonium with L>0.
Here, v is the velocity of the heavy quark or antiquark in the quarkonium rest
frame, Q=sqrt{s} for e^+e^- annihilation, Q=m_B for B-meson decays, sqrt{s} is
the e^+e^- center-of-momentum energy, m_c is the charm-quark mass, and m_B is
the B-meson mass. There are modifications to the suppression factors if
quantum-number restrictions apply for the specific process.
|
[{'version': 'v1', 'created': 'Sat, 27 Feb 2010 05:00:31 GMT'}
{'version': 'v2', 'created': 'Fri, 25 Jun 2010 17:32:09 GMT'}]
|
2010-06-28
|
[array(['Bodwin', 'Geoffrey T.', '', 'Argonne'], dtype=object)
array(['Tormo', 'Xavier Garcia i', '', 'Argonne & Alberta\n U.'],
dtype=object)
array(['Lee', 'Jungil', '', 'Korea U.'], dtype=object)]
|
2,730 |
2011.02638
|
Kanglin Liu
|
Kanglin Liu and Gaofeng Cao and Fei Zhou and Bozhi Liu and Jiang Duan
and Guoping Qiu
|
Towards Disentangling Latent Space for Unsupervised Semantic Face
Editing
|
11pages, 8 figures
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Facial attributes in StyleGAN generated images are entangled in the latent
space which makes it very difficult to independently control a specific
attribute without affecting the others. Supervised attribute editing requires
annotated training data which is difficult to obtain and limits the editable
attributes to those with labels. Therefore, unsupervised attribute editing in
an disentangled latent space is key to performing neat and versatile semantic
face editing. In this paper, we present a new technique termed
Structure-Texture Independent Architecture with Weight Decomposition and
Orthogonal Regularization (STIA-WO) to disentangle the latent space for
unsupervised semantic face editing. By applying STIA-WO to GAN, we have
developed a StyleGAN termed STGAN-WO which performs weight decomposition
through utilizing the style vector to construct a fully controllable weight
matrix to regulate image synthesis, and employs orthogonal regularization to
ensure each entry of the style vector only controls one independent feature
matrix. To further disentangle the facial attributes, STGAN-WO introduces a
structure-texture independent architecture which utilizes two independently and
identically distributed (i.i.d.) latent vectors to control the synthesis of the
texture and structure components in a disentangled way. Unsupervised semantic
editing is achieved by moving the latent code in the coarse layers along its
orthogonal directions to change texture related attributes or changing the
latent code in the fine layers to manipulate structure related ones. We present
experimental results which show that our new STGAN-WO can achieve better
attribute editing than state of the art methods.
|
[{'version': 'v1', 'created': 'Thu, 5 Nov 2020 03:29:24 GMT'}
{'version': 'v2', 'created': 'Mon, 19 Jul 2021 01:21:52 GMT'}]
|
2021-07-20
|
[array(['Liu', 'Kanglin', ''], dtype=object)
array(['Cao', 'Gaofeng', ''], dtype=object)
array(['Zhou', 'Fei', ''], dtype=object)
array(['Liu', 'Bozhi', ''], dtype=object)
array(['Duan', 'Jiang', ''], dtype=object)
array(['Qiu', 'Guoping', ''], dtype=object)]
|
2,731 |
1802.04323
|
Robert Stiller
|
Robert A. Stiller, Colin Littlefield, Peter Garnavich, Charlotte Wood,
Franz-Josef Hambsch, Gordon Myers
|
High-Time-Resolution Photometry of AR Scorpii: Confirmation of the White
Dwarf's Spin-Down
|
Accepted for publication in AJ on July 10, 2018
| null |
10.3847/1538-3881/aad5dd
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The unique binary AR Scorpii consists of an asynchronously rotating,
magnetized white dwarf (WD) that interacts with its red-dwarf companion to
produce a large-amplitude, highly coherent pulsation every 1.97 minutes. Over
the course of two years, we obtained thirty-nine hours of time-resolved,
optical photometry of AR Sco at a typical cadence of 5 seconds to study this
pulsation. We find that it undergoes significant changes across the binary
orbital period and that its amplitude, phase, and waveform all vary as a
function of orbital phase. We show that these variations can be explained by
constructive and destructive interference between two periodic, double-peaked
signals: the spin-orbit beat pulse, and a weaker WD spin pulse. Modelling of
the light curve indicates that in the optical, the amplitude of the primary
spin pulse is 50% of the primary beat amplitude, while the secondary maxima of
the beat and spin pulses have similar amplitudes. Finally, we use our timings
of the beat pulses to confirm the presence of the disputed spin-down of the WD.
We measure a beat-frequency derivative of -5.14(32) x 10^-17 Hz/s and show that
this is attributable to the spin-down of the WD. This value is approximately
twice as large as the estimate from Marsh et al. (2016) but is nevertheless
consistent with the constraints established in Potter & Buckley (2018). Our
precise measurement of the spin-down rate confirms that the decaying rotational
energy of the magnetized white dwarf is sufficient to power the excess
electromagnetic radiation emitted by the binary.
|
[{'version': 'v1', 'created': 'Mon, 12 Feb 2018 19:38:02 GMT'}
{'version': 'v2', 'created': 'Thu, 28 Jun 2018 04:11:24 GMT'}
{'version': 'v3', 'created': 'Fri, 7 Sep 2018 19:49:53 GMT'}]
|
2018-09-19
|
[array(['Stiller', 'Robert A.', ''], dtype=object)
array(['Littlefield', 'Colin', ''], dtype=object)
array(['Garnavich', 'Peter', ''], dtype=object)
array(['Wood', 'Charlotte', ''], dtype=object)
array(['Hambsch', 'Franz-Josef', ''], dtype=object)
array(['Myers', 'Gordon', ''], dtype=object)]
|
2,732 |
1512.03440
|
Chathurika Mediwaththe
|
Chathurika P. Mediwaththe, Edward R. Stephens, David B. Smith, Anirban
Mahanti
|
Competitive Energy Trading Framework for Demand-side Management in
Neighborhood Area Networks
|
Accepted for publication in IEEE Transactions on Smart Grid
| null | null | null |
cs.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper, by comparing three potential energy trading systems, studies the
feasibility of integrating a community energy storage (CES) device with
consumer-owned photovoltaic (PV) systems for demand-side management of a
residential neighborhood area network. We consider a fully-competitive CES
operator in a non-cooperative Stackelberg game, a benevolent CES operator that
has socially favorable regulations with competitive users, and a centralized
cooperative CES operator that minimizes the total community energy cost. The
former two game-theoretic systems consider that the CES operator first
maximizes their revenue by setting a price signal and trading energy with the
grid. Then the users with PV panels play a non-cooperative repeated game
following the actions of the CES operator to trade energy with the CES device
and the grid to minimize energy costs. The centralized CES operator cooperates
with the users to minimize the total community energy cost without appropriate
incentives. The non-cooperative Stackelberg game with the fully-competitive CES
operator has a unique Stackelberg equilibrium at which the CES operator
maximizes revenue and users obtain unique Pareto-optimal Nash equilibrium CES
energy trading strategies. Extensive simulations show that the
fully-competitive CES model gives the best trade-off of operating environment
between the CES operator and the users.
|
[{'version': 'v1', 'created': 'Thu, 10 Dec 2015 21:13:50 GMT'}
{'version': 'v2', 'created': 'Sun, 3 Apr 2016 01:28:25 GMT'}
{'version': 'v3', 'created': 'Tue, 5 Apr 2016 01:27:02 GMT'}
{'version': 'v4', 'created': 'Tue, 26 Apr 2016 02:24:36 GMT'}
{'version': 'v5', 'created': 'Tue, 24 Jan 2017 23:51:21 GMT'}]
|
2017-01-26
|
[array(['Mediwaththe', 'Chathurika P.', ''], dtype=object)
array(['Stephens', 'Edward R.', ''], dtype=object)
array(['Smith', 'David B.', ''], dtype=object)
array(['Mahanti', 'Anirban', ''], dtype=object)]
|
2,733 |
2105.07832
|
Pedro M. Q. Cruz
|
Pedro M. Q. Cruz, J. Fern\'andez-Rossier
|
Testing complementarity on a transmon quantum processor
|
18 pages, 8 figures
|
Phys. Rev. A 104, 032223 (2021)
|
10.1103/PhysRevA.104.032223
| null |
quant-ph cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose quantum circuits to test interferometric complementarity using
symmetric two-way interferometers coupled to a which-path detector. First, we
consider the two-qubit setup in which the controlled transfer of path
information to the detector subsystem depletes interference on the probed
subspace, testing the visibility-distinguishability trade-off via minimum-error
state discrimination measurements. Next, we consider the quantum eraser setup,
in which reading out path information in the right basis recovers an
interference pattern. These experiments are then carried out in an IBM
superconducting transmon processor. A detailed analysis of the results is
provided. Despite finding good agreement with theory at a coarse level, we also
identify small but persistent systematic deviations preventing the observation
of full particle-like and wave-like statistics. We understand them by carefully
modeling two-qubit gates, showing that even small coherent errors in their
implementation preclude the observation of Bohr's strong formulation of
complementarity.
|
[{'version': 'v1', 'created': 'Mon, 17 May 2021 13:46:14 GMT'}
{'version': 'v2', 'created': 'Tue, 28 Sep 2021 15:26:52 GMT'}]
|
2021-09-29
|
[array(['Cruz', 'Pedro M. Q.', ''], dtype=object)
array(['Fernández-Rossier', 'J.', ''], dtype=object)]
|
2,734 |
1606.02606
|
Jorge Bellorín
|
Jorge Bellorin and Alvaro Restuccia
|
Quantization of the Horava theory at the kinetic-conformal point
|
36 pages, 1 figure. Version 2: changes in presentation, some
explanations have been expanded
|
Phys. Rev. D 94, 064041 (2016)
|
10.1103/PhysRevD.94.064041
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Horava theory depends on several coupling constants. The kinetic term of
its Lagrangian depends on one dimensionless coupling constant lambda. For the
particular value lambda = 1/3 the kinetic term becomes conformal invariant,
although the full Lagrangian does not have this symmetry. For any value of
lambda the nonprojectable version of the theory has second-class constraints
which play a central role in the process of quantization. Here we study the
complete nonprojectable theory, including the Blas-Pujolas-Sibiryakov
interacting terms, at the kinetic-conformal point lambda = 1/3. The generic
counting of degrees of freedom indicates that this theory propagates the same
physical degrees of freedom of General Relativity. We analyze this point
rigorously taking into account all the z=1,2,3 terms that contribute to the
action describing quadratic perturbations around the Minkowski spacetime. We
show that the constraints of the theory and equations determining the Lagrange
multipliers are strongly elliptic partial differential equations, an essential
condition for a constrained phase-space structure in field theory. We show how
their solutions lead to the two independent tensorial physical modes propagated
by the theory. We also obtain the reduced Hamiltonian. These arguments
strengthen the consistency of the theory. We find the restrictions on the space
of coupling constants to ensure the positiveness of the reduced Hamiltonian. We
obtain the propagator of the physical modes, showing that there are not ghosts
and that the propagator effectively acquires the z=3 scaling for all physical
degrees of freedom at the high energy regime. By evaluating the superficial
degree of divergence, taking into account the second-class constraints, we show
that the theory is power-counting renormalizable. ...
|
[{'version': 'v1', 'created': 'Wed, 8 Jun 2016 15:30:18 GMT'}
{'version': 'v2', 'created': 'Wed, 5 Oct 2016 15:31:40 GMT'}]
|
2016-10-06
|
[array(['Bellorin', 'Jorge', ''], dtype=object)
array(['Restuccia', 'Alvaro', ''], dtype=object)]
|
2,735 |
1404.6144
|
Christian Sch\"uppler
|
Ch. Sch\"uppler, T. L\"ohne, A. V. Krivov, S. Ertel, J. P. Marshall,
C. Eiroa
|
Collisional modelling of the debris disc around HIP 17439
|
Astronomy and Astrophysics (accepted for publication). 11 pages, 8
figures
|
A&A 567, A127 (2014)
|
10.1051/0004-6361/201423523
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present an analysis of the debris disc around the nearby K2 V star HIP
17439. In the context of the Herschel DUNES key programme the disc was observed
and spatially resolved in the far-IR with the Herschel PACS and SPIRE
instruments. In a first model, Ertel et al. (2014) assumed the size and radial
distribution of the circumstellar dust to be independent power laws. There, by
exploring a very broad range of possible model parameters several scenarios
capable of explaining the observations were suggested. In this paper, we
perform a follow-up in-depth collisional modelling of these scenarios trying to
further distinguish between them. In our models we consider collisions, direct
radiation pressure, and drag forces, i.e. the actual physical processes
operating in debris discs. We find that all scenarios discussed in Ertel et al.
are physically sensible and can reproduce the observed SED along with the PACS
surface brightness profiles reasonably well. In one model, the dust is produced
beyond 120au in a narrow planetesimal belt and is transported inwards by
Poynting-Robertson and stellar wind drag. A good agreement with the observed
radial profiles would require stellar winds by about an order of magnitude
stronger than the solar value, which is not supported, although not ruled out,
by observations. Another model consists of two spatially separated planetesimal
belts, a warm inner and a cold outer one. This scenario would probably imply
the presence of planets clearing the gap between the two components. Finally,
we show qualitatively that the observations can be explained by assuming the
dust is produced in a single, but broad planetesimal disc with a surface
density of solids rising outwards, as expected for an extended disc that
experiences a natural inside-out collisional depletion. Prospects of
discriminating between the competing scenarios by future observations are
discussed.
|
[{'version': 'v1', 'created': 'Thu, 24 Apr 2014 15:10:38 GMT'}]
|
2014-09-05
|
[array(['Schüppler', 'Ch.', ''], dtype=object)
array(['Löhne', 'T.', ''], dtype=object)
array(['Krivov', 'A. V.', ''], dtype=object)
array(['Ertel', 'S.', ''], dtype=object)
array(['Marshall', 'J. P.', ''], dtype=object)
array(['Eiroa', 'C.', ''], dtype=object)]
|
2,736 |
2110.02139
|
Junqiang Ge
|
Chao Yang, Junqiang Ge, and Youjun Lu
|
Investigating the co-evolution of massive black holes in dual active
galactic nuclei and their host galaxies via galaxy merger simulations
|
SCPMA published, 14 pages, 8 figures
|
2019, Science China Physics, Mechanics, and Astronomy, 62, 129511
| null | null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Major galaxy mergers can trigger nuclear activities and are responsible for
high-luminosity quasi-stellar objects /active galactic nuclei (QSOs/AGNs). In
certain circumstances, such mergers may cause dual active galactic nuclei
(dAGN) phenomenon. This study investigates dAGN triggering and evolution of
massive black holes (MBHs) during the merging processes using hydrodynamic code
GADGET-2 to simulate several gas-rich major mergers at redshift $z=2$ and $3$,
respectively. Results reveal that gas-rich major mergers can trigger
significant nuclear activities after the second and third pericentric passages
and the formation of dAGN with significant time duration ($\sim 10 - 390$ Myr).
During the merging processes, galactic bulge evolves with time because of the
rapid star formation in each (or both) galactic centers and initial mixing of
stars in galactic disks due to violent relaxation. MBHs grow substantially due
to accretion and finally merge into a bigger black hole. The growth of galactic
bulges and corresponding increases of its velocity dispersions predate the
growth of MBHs in the dAGN stages. The MBHs in these stages deviate below the
relation between MBH mass and bulge mass (or velocity dispersion), and they
revert to the relation after the final mergers due to the significant accretion
that occurs mostly at a separation less than a few kpc. Then, the two MBHs
merge with each other.
|
[{'version': 'v1', 'created': 'Tue, 5 Oct 2021 16:13:34 GMT'}
{'version': 'v2', 'created': 'Thu, 21 Oct 2021 04:46:55 GMT'}]
|
2021-10-22
|
[array(['Yang', 'Chao', ''], dtype=object)
array(['Ge', 'Junqiang', ''], dtype=object)
array(['Lu', 'Youjun', ''], dtype=object)]
|
2,737 |
1804.08431
|
Arun Kumar Awasthi
|
Veena Choithani, Rajmal Jain, Arun Kumar Awasthi, Geetanjali Singh,
Sneha Chaudhari and Som Kumar Sharma
|
Study of temporal and spectral characteristics of the X-ray emission
from solar flares
|
Accepted for Publication in Research in Astronomy and Astrophysics
(RAA) Journal. arXiv admin note: text overlap with arXiv:1210.4210 by other
authors
| null |
10.1088/1674-4527/18/10/121
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Temporal and spectral characteristics of X-ray emission from 60 flares of
intensity $\ge$C class observed by Solar X-ray Spectrometer (SOXS) during
2003-2011 are presented. We analyse the X-ray emission observed in four and
three energy bands by the Si and CZT detectors, respectively. The number of
peaks in the intensity profile of the flares varies between 1 and 3. We find
moderate correlation (R$\simeq$0.2) between the rise time and the peak flux of
the first peak of the flare irrespective to energy band, which is indicative of
its energy-independent nature. Moreover, magnetic field complexity of the
flaring region is found to be anti-correlated (R=0.61) with the rise time of
the flares while positively correlated (R=0.28) with the peak flux of the
flare. The time delay between the peak of the X-ray emission in a given energy
band and that in the 25-30 keV decreases with increasing energy suggesting
conduction cooling to be dominant in the lower energies. Analysis of 340
spectra from 14 flares reveals that the peak of Differential Emission Measure
(DEM) evolution delays by 60-360 s relative to that of the temperature, and
this time delay is inversely proportional to the peak flux of the flare. We
conclude that temporal and intensity characteristics of flares are energy
dependent as well as magnetic field configuration of the active region.
|
[{'version': 'v1', 'created': 'Thu, 19 Apr 2018 19:01:17 GMT'}]
|
2018-10-17
|
[array(['Choithani', 'Veena', ''], dtype=object)
array(['Jain', 'Rajmal', ''], dtype=object)
array(['Awasthi', 'Arun Kumar', ''], dtype=object)
array(['Singh', 'Geetanjali', ''], dtype=object)
array(['Chaudhari', 'Sneha', ''], dtype=object)
array(['Sharma', 'Som Kumar', ''], dtype=object)]
|
2,738 |
2303.07037
|
Yo\"el Perreau
|
Rainis Haller and Johann Langemets and Yo\"el Perreau and Triinu
Veeorg
|
Unconditional bases and Daugavet renormings
|
21 pages
| null | null | null |
math.FA
|
http://creativecommons.org/licenses/by/4.0/
|
We introduce a new diametral notion for points of the unit sphere of Banach
spaces, that naturally complements the notion of Delta-points, but is weaker
than the notion of Daugavet points. We prove that this notion can be used to
provide a new geometric characterization of the Daugavet property, as well as
to recover -- and even to provide new -- results about Daugavet points in
various contexts such as absolute sums of Banach spaces or projective tensor
products. Finally, we show that this notion leads to powerful new ideas for
renorming questions, and that those ideas can be combined with previous
constructions from the literature in order to renorm every infinite dimensional
Banach space with an unconditional Schauder basis to have a Daugavet point.
|
[{'version': 'v1', 'created': 'Mon, 13 Mar 2023 11:55:53 GMT'}]
|
2023-03-14
|
[array(['Haller', 'Rainis', ''], dtype=object)
array(['Langemets', 'Johann', ''], dtype=object)
array(['Perreau', 'Yoël', ''], dtype=object)
array(['Veeorg', 'Triinu', ''], dtype=object)]
|
2,739 |
2004.05579
|
David Levin
|
David Levin
|
Reconstruction of piecewise-smooth multivariate functions from Fourier
data
|
22 pages, 21 figures
| null | null | null |
math.NA cs.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In some applications, one is interested in reconstructing a function $f$ from
its Fourier series coefficients. The problem is that the Fourier series is
slowly convergent if the function is non-periodic, or is non-smooth. In this
paper, we suggest a method for deriving high order approximation to $f$ using a
Pad\'e-like method. Namely, by fitting some Fourier coefficients of the
approximant to the given Fourier coefficients of $f$. Given the Fourier series
coefficients of a function on a rectangular domain in $\mathbb{R}^d$, assuming
the function is piecewise smooth, we approximate the function by piecewise high
order spline functions. First, the singularity structure of the function is
identified. For example in the 2-D case, we find high accuracy approximation to
the curves separating between smooth segments of $f$. Secondly, simultaneously
we find the approximations of all the different segments of $f$. We start by
developing and demonstrating a high accuracy algorithm for the 1-D case, and we
use this algorithm to step up to the multidimensional case.
|
[{'version': 'v1', 'created': 'Sun, 12 Apr 2020 10:16:34 GMT'}]
|
2020-04-14
|
[array(['Levin', 'David', ''], dtype=object)]
|
2,740 |
1809.04406
|
Wouter Ryssens
|
W. Ryssens, M. Bender, K. Bennaceur, P.-H. Heenen, and J. Meyer
|
The impact of the surface energy coefficient on the deformation
properties of atomic nuclei as predicted by Skyrme energy density functionals
|
31 pages, 28 colour figures. Revised version as published; major
changes include a rewritten conclusion section and clearer figures
|
Phys. Rev. C 99, 044315 (2019)
|
10.1103/PhysRevC.99.044315
| null |
nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the framework of nuclear energy density functional (EDF) methods, many
nuclear phenomena are related to the deformation of intrinsic states. Their
accurate modeling relies on the correct description of the change of nuclear
binding energy with deformation. The two most important contributions to the
deformation energy have their origin in shell effects that are correlated to
the spectrum of single-particle states, and the deformability of nuclear
matter, that can be characterized by a model-dependent surface energy
coefficient a_{surf}.
With the goal of improving the global performance of nuclear EDFs through
fine-tuning of their deformation properties, the purpose of this study is
threefold. First, to analyze the impact of systematic variations of a_{surf} on
properties of nuclei; second, to identify observables that can be safely used
to narrow down the range of appropriate values of a_{surf} to be targeted in
future parameter fits; third, to analyze the interdependence of a_{surf} with
other properties of a nuclear EDF.
Results for a large variety of relevant observables of deformed nuclei
obtained from self-consistent mean-field calculations with a set of
purpose-built SLy5sX parameterizations of the Skyrme EDF are correlated with
the value of a_{surf}.
The three main conclusions are that there is an evident preference for a
comparatively low value of a_{surf}, as expected from the performance of
existing parameterizations; that the isospin dependence of the surface energy
also needs further finetuning in order to describe trends across the chart of
nuclei; and that a satisfying simultaneous description of fission barriers and
superdeformed states requires a better description of the single-particle
spectra.
[Note: The abstract has been abbreviated because of length restrictions
imposed by the arXiv. See the paper for the full abstract.]
|
[{'version': 'v1', 'created': 'Wed, 12 Sep 2018 13:17:17 GMT'}
{'version': 'v2', 'created': 'Thu, 25 Apr 2019 14:34:38 GMT'}]
|
2019-04-26
|
[array(['Ryssens', 'W.', ''], dtype=object)
array(['Bender', 'M.', ''], dtype=object)
array(['Bennaceur', 'K.', ''], dtype=object)
array(['Heenen', 'P. -H.', ''], dtype=object)
array(['Meyer', 'J.', ''], dtype=object)]
|
2,741 |
2301.11461
|
Mirco Theile
|
Mirco Theile, Daniele Bernardini, Raphael Trumpp, Cristina Piazza,
Marco Caccamo, Alberto L. Sangiovanni-Vincentelli
|
Learning to Generate All Feasible Actions
| null | null | null | null |
cs.LG cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Several machine learning (ML) applications are characterized by searching for
an optimal solution to a complex task. The search space for this optimal
solution is often very large, so large in fact that this optimal solution is
often not computable. Part of the problem is that many candidate solutions
found via ML are actually infeasible and have to be discarded. Restricting the
search space to only the feasible solution candidates simplifies finding an
optimal solution for the tasks. Further, the set of feasible solutions could be
re-used in multiple problems characterized by different tasks. In particular,
we observe that complex tasks can be decomposed into subtasks and corresponding
skills. We propose to learn a reusable and transferable skill by training an
actor to generate all feasible actions. The trained actor can then propose
feasible actions, among which an optimal one can be chosen according to a
specific task. The actor is trained by interpreting the feasibility of each
action as a target distribution. The training procedure minimizes a divergence
of the actor's output distribution to this target. We derive the general
optimization target for arbitrary f-divergences using a combination of kernel
density estimates, resampling, and importance sampling. We further utilize an
auxiliary critic to reduce the interactions with the environment. A preliminary
comparison to related strategies shows that our approach learns to visit all
the modes in the feasible action space, demonstrating the framework's potential
for learning skills that can be used in various downstream tasks.
|
[{'version': 'v1', 'created': 'Thu, 26 Jan 2023 23:15:51 GMT'}]
|
2023-01-30
|
[array(['Theile', 'Mirco', ''], dtype=object)
array(['Bernardini', 'Daniele', ''], dtype=object)
array(['Trumpp', 'Raphael', ''], dtype=object)
array(['Piazza', 'Cristina', ''], dtype=object)
array(['Caccamo', 'Marco', ''], dtype=object)
array(['Sangiovanni-Vincentelli', 'Alberto L.', ''], dtype=object)]
|
2,742 |
0705.2594
|
Tibor Antal
|
Tibor Antal, P. L. Krapivsky, and Kirone Mallick
|
Molecular Spiders in One Dimension
|
14 pages, 2 figures
|
Journal of Statistical Mechanics P08027 (2007)
|
10.1088/1742-5468/2007/08/P08027
| null |
cond-mat.stat-mech math.PR q-bio.QM
| null |
Molecular spiders are synthetic bio-molecular systems which have "legs" made
of short single-stranded segments of DNA. Spiders move on a surface covered
with single-stranded DNA segments complementary to legs. Different mappings are
established between various models of spiders and simple exclusion processes.
For spiders with simple gait and varying number of legs we compute the
diffusion coefficient; when the hopping is biased we also compute their
velocity.
|
[{'version': 'v1', 'created': 'Fri, 18 May 2007 19:52:35 GMT'}]
|
2007-08-25
|
[array(['Antal', 'Tibor', ''], dtype=object)
array(['Krapivsky', 'P. L.', ''], dtype=object)
array(['Mallick', 'Kirone', ''], dtype=object)]
|
2,743 |
1706.05558
|
Lynn Scow
|
Lynn Scow
|
Ramsey transfer to semi-retractions
|
final version, changed title
| null |
10.1016/j.apal.2011.12.013
| null |
math.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce the notion of a {\it semi-retraction}. Given two structures $\A$
and $\B$, $\A$ is a semi-retraction of $\B$ if there exist quantifier-free type
respecting maps $f: \B \raw \A$ and $g: \A \raw \B$ such that $f \circ g$ is an
embedding. We say that a structure has the Ramsey property if its age does.
Given two locally finite ordered structures $\A$ and $\B$, if $\A$ is a
semi-retraction of $\B$ and $\B$ has the Ramsey property, then $\A$ also has
the Ramsey property. We introduce notation for what we call semi-direct product
structures, after the group construction known to preserve the Ramsey
property.~\cite{kpt05} We introduce the notion of a color-homogenizing map, and
use this notion to give a finitary argument that the semi-direct product
structure of ordered relational structures with the Ramsey property must also
have the Ramsey property. Finally, we characterize NIP theories using a
generalized indiscernible sequence indexed by a semi-direct product structure.
|
[{'version': 'v1', 'created': 'Sat, 17 Jun 2017 16:23:53 GMT'}
{'version': 'v2', 'created': 'Thu, 12 Apr 2018 17:22:33 GMT'}
{'version': 'v3', 'created': 'Sun, 1 Nov 2020 15:17:35 GMT'}]
|
2020-11-03
|
[array(['Scow', 'Lynn', ''], dtype=object)]
|
2,744 |
physics/0011015
|
Jose A. Miranda
|
Mario H. Oliveira and Jose A. Miranda (Depto. de Fisica - UFPE,
Brazil)
|
Biot-Savart-like law in electrostatics
|
14 pages, 6 figures, RevTex, accepted for publication in the European
Journal of Physics
| null |
10.1088/0143-0807/22/1/304
| null |
physics.class-ph physics.gen-ph
| null |
The Biot-Savart law is a well-known and powerful theoretical tool used to
calculate magnetic fields due to currents in magnetostatics. We extend the
range of applicability and the formal structure of the Biot-Savart law to
electrostatics by deriving a Biot-Savart-like law suitable for calculating
electric fields. We show that, under certain circumstances, the traditional
Dirichlet problem can be mapped onto a much simpler Biot-Savart-like problem.
We find an integral expression for the electric field due to an arbitrarily
shaped, planar region kept at a fixed electric potential, in an otherwise
grounded plane. As a by-product we present a very simple formula to compute the
field produced in the plane defined by such a region. We illustrate the
usefulness of our approach by calculating the electric field produced by planar
regions of a few nontrivial shapes.
|
[{'version': 'v1', 'created': 'Tue, 7 Nov 2000 12:13:14 GMT'}]
|
2009-11-06
|
[array(['Oliveira', 'Mario H.', '', 'Depto. de Fisica - UFPE,\n Brazil'],
dtype=object)
array(['Miranda', 'Jose A.', '', 'Depto. de Fisica - UFPE,\n Brazil'],
dtype=object) ]
|
2,745 |
1901.07799
|
Ulrich Tutsch
|
U. Tutsch, O. Tsyplyatyev, M. Kuhnt, L. Postulka, B. Wolf, P. T. Cong,
F. Ritter, C. Krellner, W. A{\ss}mus, B. Schmidt, P. Thalmeier, P. Kopietz,
M. Lang
|
Specific Heat Study of 1D and 2D Excitations in the Layered Frustrated
Quantum Antiferromagnets Cs$_2$CuCl$_{4-x}$Br$_x$
| null |
Phys. Rev. Lett. 123, 147202 (2019)
|
10.1103/PhysRevLett.123.147202
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report an experimental and theoretical study of the low-temperature
specific heat $C$ and magnetic susceptibility $\chi$ of the layered anisotropic
triangular-lattice spin-1/2 Heisenberg antiferromagnets
Cs$_2$CuCl$_{4-x}$Br$_x$ with $x$ = 0, 1, 2, and 4. We find that the ratio
$J'/J$ of the exchange couplings ranges from 0.32 to $\approx 0.78$, implying a
change (crossover or quantum phase transition) in the materials' magnetic
properties from one-dimensional (1D) behavior for $J'/J < 0.6$ to
two-dimensional (2D) behavior for $J'/J \approx 0.78$ behavior. For $J'/J <
0.6$, realized for $x$ = 0, 1, and 4, we find a magnetic contribution to the
low-temperature specific heat, $C_{\rm m} \propto T$, consistent with spinon
excitations in 1D spin-1/2 Heisenberg antiferromagnets. Remarkably, for $x$ =
2, where $J'/J \approx 0.78$ implies a 2D magnatic character, we also observe
$C_{\rm m} \propto T$. This finding, which contrasts the prediction of $C_{\rm
m} \propto T^2$ made by standard spin-wave theories, shows that Fermi-like
statistics also plays a significant role for the magnetic excitations in
frustrated spin-1/2 2D antiferromagnets.
|
[{'version': 'v1', 'created': 'Wed, 23 Jan 2019 10:13:10 GMT'}]
|
2019-10-10
|
[array(['Tutsch', 'U.', ''], dtype=object)
array(['Tsyplyatyev', 'O.', ''], dtype=object)
array(['Kuhnt', 'M.', ''], dtype=object)
array(['Postulka', 'L.', ''], dtype=object)
array(['Wolf', 'B.', ''], dtype=object)
array(['Cong', 'P. T.', ''], dtype=object)
array(['Ritter', 'F.', ''], dtype=object)
array(['Krellner', 'C.', ''], dtype=object)
array(['Aßmus', 'W.', ''], dtype=object)
array(['Schmidt', 'B.', ''], dtype=object)
array(['Thalmeier', 'P.', ''], dtype=object)
array(['Kopietz', 'P.', ''], dtype=object)
array(['Lang', 'M.', ''], dtype=object)]
|
2,746 |
2109.12478
|
Tomoo Yokoyama
|
Tomoo Yokoyama
|
A Poincar\'e-Bendixson theorem for flows with arbitrarily many singular
points
|
arXiv admin note: text overlap with arXiv:1703.05501
| null | null | null |
math.DS
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
The Poincar\'e-Bendixson theorem is one of the most fundamental tools to
capture the limit behaviors of orbits of flows. It was generalized and was
applied to various phenomena in dynamical systems, differential equations,
foliations, group actions, translation lines, and semi-dynamical systems. On
the other hand, though the no-slip boundary condition is a fundamental
condition in differential equations and appears in various fluid phenomena and
since Lakes of Wada attractors naturally occur in discrete and continuous real
dynamical systems and complex dynamics, no generalizations of the
Poincar\'e-Bendixson theorem can be applied to any differential equations with
no-slip boundary condition on surfaces with boundary and flows with Lakes of
Wada attractors. To analyze them, we generalize the Poincar\'e-Bendixson
theorem into one for flows with arbitrarily many singular points on possibly
non-compact surfaces by using methods of foliation theory and general topology.
Moreover, the generalization implies topological characterizations of
recurrence, which are generalizations of the Ma{\v \i}er's description of
recurrence. In addition, we construct a blow-up operation that makes
$\omega$-limit sets not arcwise-connected.
|
[{'version': 'v1', 'created': 'Sun, 26 Sep 2021 02:49:22 GMT'}
{'version': 'v2', 'created': 'Mon, 3 Jan 2022 01:05:55 GMT'}
{'version': 'v3', 'created': 'Wed, 14 Sep 2022 00:45:09 GMT'}]
|
2022-09-15
|
[array(['Yokoyama', 'Tomoo', ''], dtype=object)]
|
2,747 |
1308.1780
|
Jonathan Heras
|
J\'onathan Heras, Ekaterina Komendantskaya, Moa Johansson and Ewen
Maclean
|
Proof-Pattern Recognition and Lemma Discovery in ACL2
| null | null | null | null |
cs.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a novel technique for combining statistical machine learning for
proof-pattern recognition with symbolic methods for lemma discovery. The
resulting tool, ACL2(ml), gathers proof statistics and uses statistical
pattern-recognition to pre-processes data from libraries, and then suggests
auxiliary lemmas in new proofs by analogy with already seen examples. This
paper presents the implementation of ACL2(ml) alongside theoretical
descriptions of the proof-pattern recognition and lemma discovery methods
involved in it.
|
[{'version': 'v1', 'created': 'Thu, 8 Aug 2013 08:17:46 GMT'}
{'version': 'v2', 'created': 'Tue, 15 Oct 2013 15:35:32 GMT'}]
|
2013-10-16
|
[array(['Heras', 'Jónathan', ''], dtype=object)
array(['Komendantskaya', 'Ekaterina', ''], dtype=object)
array(['Johansson', 'Moa', ''], dtype=object)
array(['Maclean', 'Ewen', ''], dtype=object)]
|
2,748 |
1001.1181
|
James Cooper Dr.
|
J. N. Cooper, M. Plummer and E. A. G. Armour
|
Equivalence of the generalized and complex Kohn variational methods
|
33 pages, no figures. This version of the article has been accepted
by J. Phys. A.
| null |
10.1088/1751-8113/43/17/175302
| null |
quant-ph math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For Kohn variational calculations on low energy positron hydrogen molecule
elastic scattering, we prove that the phase shift approximation obtained using
the complex Kohn method is precisely equal to a value which can be obtained
immediately via the real-generalized Kohn method. Our treatment is sufficiently
general to be applied directly to arbitrary potential scattering or single open
channel scattering problems, with exchange if required. In the course of our
analysis, we develop a framework formally to describe the anomalous behaviour
of our generalized Kohn calculations in the regions of the well known Schwartz
singularities. This framework also explains the mathematical origin of the
anomaly-free singularities we reported in a previous article. Moreover, we
demonstrate a novelty, that explicit solutions of the Kohn equations are not
required in order to calculate optimal phase shift approximations. We relate
our rigorous framework to earlier descriptions of the Kohn-type methods.
|
[{'version': 'v1', 'created': 'Fri, 8 Jan 2010 00:14:29 GMT'}
{'version': 'v2', 'created': 'Thu, 11 Mar 2010 16:11:22 GMT'}]
|
2015-05-14
|
[array(['Cooper', 'J. N.', ''], dtype=object)
array(['Plummer', 'M.', ''], dtype=object)
array(['Armour', 'E. A. G.', ''], dtype=object)]
|
2,749 |
1703.00477
|
Robert Griffin
|
Robert J. Griffin, Georg Wiedebach, Sylvain Bertrand, Alexander
Leonessa, Jerry Pratt
|
Walking Stabilization Using Step Timing and Location Adjustment on the
Humanoid Robot, Atlas
| null |
Intelligent Robots and Systems (IROS), 2017 IEEE/RSJ International
Conference on
|
10.1109/IROS.2017.8202223
| null |
cs.RO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
While humans are highly capable of recovering from external disturbances and
uncertainties that result in large tracking errors, humanoid robots have yet to
reliably mimic this level of robustness. Essential to this is the ability to
combine traditional "ankle strategy" balancing with step timing and location
adjustment techniques. In doing so, the robot is able to step quickly to the
necessary location to continue walking. In this work, we present both a new
swing speed up algorithm to adjust the step timing, allowing the robot to set
the foot down more quickly to recover from errors in the direction of the
current capture point dynamics, and a new algorithm to adjust the desired
footstep, expanding the base of support to utilize the center of pressure
(CoP)-based ankle strategy for balance. We then utilize the desired centroidal
moment pivot (CMP) to calculate the momentum rate of change for our
inverse-dynamics based whole-body controller. We present simulation and
experimental results using this work, and discuss performance limitations and
potential improvements.
|
[{'version': 'v1', 'created': 'Wed, 1 Mar 2017 19:33:43 GMT'}
{'version': 'v2', 'created': 'Wed, 27 Dec 2017 16:39:05 GMT'}]
|
2017-12-29
|
[array(['Griffin', 'Robert J.', ''], dtype=object)
array(['Wiedebach', 'Georg', ''], dtype=object)
array(['Bertrand', 'Sylvain', ''], dtype=object)
array(['Leonessa', 'Alexander', ''], dtype=object)
array(['Pratt', 'Jerry', ''], dtype=object)]
|
2,750 |
astro-ph/9909273
|
Lauro Moscardini
|
Lauro Moscardini, Sabino Matarrese, Francesco Lucchin, Piero Rosati
|
Predicting the Clustering of X-Ray Selected Galaxy Clusters in
Flux-Limited Surveys
|
20 pages, Latex using MN style, 11 figures enclosed. Version accepted
for publication in MNRAS
|
Mon.Not.Roy.Astron.Soc. 316 (2000) 283
|
10.1046/j.1365-8711.2000.03494.x
| null |
astro-ph
| null |
(abridged) We present a model to predict the clustering properties of X-ray
clusters in flux-limited surveys. Our technique correctly accounts for past
light-cone effects on the observed clustering and follows the non-linear
evolution in redshift of the underlying DM correlation function and cluster
bias factor. The conversion of the limiting flux of a survey into the
corresponding minimum mass of the hosting DM haloes is obtained by using
theoretical and empirical relations between mass, temperature and X-ray
luminosity of clusters. Finally, our model is calibrated to reproduce the
observed cluster counts adopting a temperature-luminosity relation moderately
evolving with redshift. We apply our technique to three existing catalogues:
BCS, XBACs and REFLEX samples. Moreover, we consider an example of possible
future space missions with fainter limiting flux. In general, we find that the
amplitude of the spatial correlation function is a decreasing function of the
limiting flux and that the EdS models always give smaller correlation
amplitudes than open or flat models with low matter density parameter. In the
case of XBACs, the comparison with previous estimates of the observational
spatial correlation shows that only the predictions of models with Omega_0m=0.3
are in good agreement with the data, while the EdS models have too low a
correlation strength. Finally, we use our technique to discuss the best
strategy for future surveys. Our results show that the choice of a wide area
catalogue, even with a brighter limiting flux, is preferable to a deeper, but
with smaller area, survey.
|
[{'version': 'v1', 'created': 'Wed, 15 Sep 1999 19:04:08 GMT'}
{'version': 'v2', 'created': 'Mon, 28 Feb 2000 21:06:16 GMT'}]
|
2009-10-31
|
[array(['Moscardini', 'Lauro', ''], dtype=object)
array(['Matarrese', 'Sabino', ''], dtype=object)
array(['Lucchin', 'Francesco', ''], dtype=object)
array(['Rosati', 'Piero', ''], dtype=object)]
|
2,751 |
astro-ph/0703567
|
Quinn Konopacky
|
Q.M. Konopacky, A.M. Ghez, E.L. Rice, and G. Duchene
|
New Very Low Mass Binaries in the Taurus Star-Forming Region
|
6 Pages (emulateapj style), 3 Figures. Accepted for publication in
ApJ
|
Astrophys.J.663:394-399,2007
|
10.1086/518360
| null |
astro-ph
| null |
We surveyed thirteen very low mass (VLM; M < 0.2 M_sun) objects in the Taurus
star-forming region using near-infrared diffraction-limited imaging techniques
on the W.M. Keck I 10 m telescope. Of these thirteen, five were found to be
binary, with separations ranging from 0.04" to 0.6" and flux ratios from 1.4 to
3.7. In all cases, the companions are likely to be physically associated with
the primaries (probability > 4-sigma). Using the theoretical models of Baraffe
et al. (1998), we find that all five new companions, as well as one of the
primaries, are likely brown dwarfs. The discovery of these systems therefore
increases the total number of known, young VLM binaries by ~50%. These new
systems, along with other young VLM binaries from the literature, have
properties that differ significantly from older field VLM binaries in that the
young systems have wider separations and lower mass ratios, supporting the idea
that VLM binaries undergo significant dynamical evolution ~5 - 10 Myr after
their formation. The range of separations of these binaries, four of which are
over 30 AU, argues against the ejection scenario of brown dwarf formation.
While several of the young, VLM binaries discovered in this study have lower
binding energies than the previously suggested minimum for VLM binaries, the
apparent minimum is still significantly higher than that found among higher
mass binaries. We suggest that this discrepancy may be due to the small mass of
a VLM binary relative to the average perturbing star, leading to more
substantial changes in their binding energy over time.
|
[{'version': 'v1', 'created': 'Wed, 21 Mar 2007 18:27:56 GMT'}]
|
2011-02-11
|
[array(['Konopacky', 'Q. M.', ''], dtype=object)
array(['Ghez', 'A. M.', ''], dtype=object)
array(['Rice', 'E. L.', ''], dtype=object)
array(['Duchene', 'G.', ''], dtype=object)]
|
2,752 |
2303.13875
|
Carlos Jos\'e D\'iaz Baso
|
C. J. D\'iaz Baso, L. Rouppe van der Voort, J. de la Cruz Rodr\'iguez,
J. Leenaarts
|
Designing wavelength sampling for Fabry-P\'erot observations.
Information-based spectral sampling
|
8 pages, 7 figures, accepted for publication in A&A
|
A&A 673, A35 (2023)
|
10.1051/0004-6361/202346230
| null |
astro-ph.SR astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Fabry-P\'erot interferometers (FPIs) have become very popular in solar
observations because they offer a balance between cadence, spatial resolution,
and spectral resolution through a careful design of the spectral sampling
scheme according to the observational requirements of a given target. However,
an efficient balance requires knowledge of the expected target conditions, the
properties of the chosen spectral line, and the instrumental characteristics.
Our aim is to find a method that allows finding the optimal spectral sampling
of FPI observations in a given spectral region. In this study, we propose a
technique based on a sequential selection approach where a neural network is
used to predict the spectrum (or physical quantities, if the model is known)
from the information at a few points. Only those points that contain relevant
information and improve the model prediction are included in the sampling
scheme. The method adapts the separation of the points according to the
spectral resolution of the instrument, the typical broadening of the spectral
shape, and the typical Doppler velocities. The experiments using the CaII 8542
A line show that the resulting wavelength scheme naturally places more points
in the core than in the wings, consistent with the sensitivity of the spectral
line at each wavelength interval. The method can also be used as an accurate
interpolator, to improve the inference of the magnetic field when using the
weak-field approximation. Overall, this method offers an objective approach for
designing new instrumentation or observing proposals with customized
configurations for specific targets. This is particularly relevant when
studying highly dynamic events in the solar atmosphere with a cadence that
preserves spectral coherence without sacrificing much information.
|
[{'version': 'v1', 'created': 'Fri, 24 Mar 2023 09:34:31 GMT'}]
|
2023-05-03
|
[array(['Baso', 'C. J. Díaz', ''], dtype=object)
array(['van der Voort', 'L. Rouppe', ''], dtype=object)
array(['Rodríguez', 'J. de la Cruz', ''], dtype=object)
array(['Leenaarts', 'J.', ''], dtype=object)]
|
2,753 |
2301.01568
|
Feiyang Tang
|
Feiyang Tang, Bjarte M. {\O}stvold, Magiel Bruntink
|
Identifying Personal Data Processing for Code Review
|
Accepted by The 9th International Conference on Information Systems
Security and Privacy (ICISSP 2023)
| null |
10.5220/0011725700003405
| null |
cs.SE cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Code review is a critical step in the software development life cycle, which
assesses and boosts the code's effectiveness and correctness, pinpoints
security issues, and raises its quality by adhering to best practices. Due to
the increased need for personal data protection motivated by legislation, code
reviewers need to understand where personal data is located in software systems
and how it is handled. Although most recent work on code review focuses on
security vulnerabilities, privacy-related techniques are not easy for code
reviewers to implement, making their inclusion in the code review process
challenging. In this paper, we present ongoing work on a new approach to
identifying personal data processing, enabling developers and code reviewers in
drafting privacy analyses and complying with regulations such as the General
Data Protection Regulation (GDPR).
|
[{'version': 'v1', 'created': 'Wed, 4 Jan 2023 12:35:29 GMT'}]
|
2023-06-21
|
[array(['Tang', 'Feiyang', ''], dtype=object)
array(['Østvold', 'Bjarte M.', ''], dtype=object)
array(['Bruntink', 'Magiel', ''], dtype=object)]
|
2,754 |
1909.13401
|
Tetsuro Habe
|
Tetsuro Habe
|
Spin-dependent refraction at the interface of lateral heterostructures
of 2$H$-type transition-metal dichalcogenide monolayers
|
6 pages, 5 figures
| null | null | null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the refraction effect of electronic wave in hole-doped lateral
heterojunctions of metallic and semiconducting transition-metal dichalcogenide
monolayers. This effect is theoretically investigated in 2$H$-type
MoSe$_2$-NbS$_2$ and WSe$_2$-NbS$_2$ junctions by combining the
first-principles calculation and the lattice Green's function method. We show
that the electronic waves change the direction of motion at the interface and
collimate the velocity along two different directions depending on the spin. We
find that the transmission probability increases with the charge density and
that the direction of refracted electron beams is close to $\pm30^\circ$ with
respect to the perpendicular axis to the interface. The metallic
transition-metal dichalcogenide is essential for the refraction effect because
of the strong trigonal-warping effect, the large Fermi surface, and the
Zeeman-type spin-orbit coupling. The refraction effect enables to generate the
spin-polarized electronic current by using a simple fabrication of
transition-metal dichalcogenide monolayers.
|
[{'version': 'v1', 'created': 'Mon, 30 Sep 2019 00:11:34 GMT'}]
|
2019-10-01
|
[array(['Habe', 'Tetsuro', ''], dtype=object)]
|
2,755 |
1912.04102
|
Lawrence R. Pratt
|
Mangesh I. Chaudhari, Juan M. Vanegas, L. R. Pratt, Ajay Muralidharan,
and Susan B. Rempe
|
Hydration Mimicry by Membrane Ion Channels
|
29 pages, 6 figures
| null | null | null |
physics.chem-ph physics.bio-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Ions transiting biomembranes might pass readily from water through
ion-specific membrane proteins if those protein channels provide environments
similar to the aqueous solution hydration environment. Indeed, bulk aqueous
solution is an important reference condition for the ion permeation process.
Assessment of this hydration mimicry view depends on understanding the
hydration structure and free energies of metal ions in water to provide a
comparison for the membrane channel environment. To refine these
considerations, we review local hydration structures of ions in bulk water, and
the molecular quasi-chemical theory that provides hydration free energies. In
that process, we note some current views of ion-binding to membrane channels
and suggest new physical-chemical calculations and experiments that might
further clarify the hydration mimicry view.
|
[{'version': 'v1', 'created': 'Mon, 9 Dec 2019 15:05:33 GMT'}]
|
2019-12-10
|
[array(['Chaudhari', 'Mangesh I.', ''], dtype=object)
array(['Vanegas', 'Juan M.', ''], dtype=object)
array(['Pratt', 'L. R.', ''], dtype=object)
array(['Muralidharan', 'Ajay', ''], dtype=object)
array(['Rempe', 'Susan B.', ''], dtype=object)]
|
2,756 |
astro-ph/0412491
|
Gerardo Arturo Vazquez
|
Gerardo A. Vazquez and Claus Leitherer
|
Optimization of Starburst99 for Intermediate-Age and Old Stellar
Populations
|
The revised Starburst99 code discussed in this paper will replace the
current version 4.0 on our Starburst99 website by December 31, 2004. Accepted
for publication in ApJ; 39 pages, 23 figures, 5 tables
|
Astrophys.J. 621 (2005) 695-717
|
10.1086/427866
| null |
astro-ph
| null |
We have incorporated the latest release of the Padova models into the
evolutionary synthesis code Starburst99. The Padova tracks were extended to
include the full asymptotic giant branch (AGB) evolution until the final
thermal pulse over the mass range 0.9 to 5 solar mass. With this addition,
Starburst99 accounts for all stellar phases that contribute to the integrated
light of a stellar population with arbitrary age from the extreme ultraviolet
to the near-infrared. AGB stars are important for ages between 0.1 and 2 Gyr,
with their contribution increasing at longer wavelengths. We investigate
similarities and differences between the model predictions by the Geneva and
the Padova tracks. The differences are particularly pronounced at ages > 1 Gyr,
when incompleteness sets in for the Geneva models. We also perform detailed
comparisons with the predictions of other major synthesis codes and found
excellent agreement. Our synthesized optical colors are compared to
observations of old, intermediate-age, and young populations. Excellent
agreement is found for the old globular cluster system of NGC 5128 and for old
and intermediate-age clusters in NGC 4038/39. In contrast, the models fail for
red supergiant dominated populations with sub-solar abundances. This failure
can be traced back to incorrect red supergiant parameters in the stellar
evolutionary tracks. Our models and the synthesis code are publicly available
as version 5.0 of Starburst99 at http://www.stsci.edu/science/starburst99/.
|
[{'version': 'v1', 'created': 'Fri, 17 Dec 2004 21:01:15 GMT'}]
|
2009-11-10
|
[array(['Vazquez', 'Gerardo A.', ''], dtype=object)
array(['Leitherer', 'Claus', ''], dtype=object)]
|
2,757 |
1006.0864
|
Willard Miller Jr.
|
Ernest G. Kalnins, Jonathan M. Kress and Willard Miller Jr
|
Tools for Verifying Classical and Quantum Superintegrability
| null |
SIGMA 6 (2010), 066, 23 pages
|
10.3842/SIGMA.2010.066
| null |
math-ph math.MP nlin.SI
|
http://creativecommons.org/licenses/by-nc-sa/3.0/
|
Recently many new classes of integrable systems in n dimensions occurring in
classical and quantum mechanics have been shown to admit a functionally
independent set of 2n-1 symmetries polynomial in the canonical momenta, so that
they are in fact superintegrable. These newly discovered systems are all
separable in some coordinate system and, typically, they depend on one or more
parameters in such a way that the system is superintegrable exactly when some
of the parameters are rational numbers. Most of the constructions to date are
for n=2 but cases where n>2 are multiplying rapidly. In this article we
organize a large class of such systems, many new, and emphasize the underlying
mechanisms which enable this phenomena to occur and to prove
superintegrability. In addition to proofs of classical superintegrability we
show that the 2D caged anisotropic oscillator and a Stackel transformed version
on the 2-sheet hyperboloid are quantum superintegrable for all rational
relative frequencies, and that a deformed 2D Kepler-Coulomb system is quantum
superintegrable for all rational values of a parameter k in the potential.
|
[{'version': 'v1', 'created': 'Fri, 4 Jun 2010 11:13:05 GMT'}
{'version': 'v2', 'created': 'Wed, 18 Aug 2010 05:49:39 GMT'}]
|
2010-08-19
|
[array(['Kalnins', 'Ernest G.', ''], dtype=object)
array(['Kress', 'Jonathan M.', ''], dtype=object)
array(['Miller', 'Willard', 'Jr'], dtype=object)]
|
2,758 |
1803.04552
|
Christine Borgman
|
Christine L. Borgman
|
Text Data Mining from the Author's Perspective: Whose Text, Whose
Mining, and to Whose Benefit?
|
Forum Statement: Data Mining with Limited Access Text: National
Forum. April 5-6, 2018. https://publish.illinois.edu/limitedaccess-tdm/
| null | null | null |
cs.DL
|
http://creativecommons.org/licenses/by/4.0/
|
Given the many technical, social, and policy shifts in access to scholarly
content since the early days of text data mining, it is time to expand the
conversation about text data mining from concerns of the researcher wishing to
mine data to include concerns of researcher-authors about how their data are
mined, by whom, for what purposes, and to whose benefits.
|
[{'version': 'v1', 'created': 'Mon, 12 Mar 2018 22:11:40 GMT'}]
|
2018-03-14
|
[array(['Borgman', 'Christine L.', ''], dtype=object)]
|
2,759 |
1311.4065
|
Elena Lebedeva Dr
|
Aleksander V. Krivoshein, Elena A. Lebedeva
|
Uncertainty Principle for the Cantor Dyadic Group
|
14 pages
| null | null | null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a notion of localization for dyadic functions, i.e. functions
defined on the Cantor group. Localization is characterized by functional $UC_d$
similar to the Heisenberg uncertainty constant used for real-line functions. We
are looking for dyadic analogs of quantitative uncertainty principles. To
justify definition we use some test functions including dyadic scaling and
wavelet functions.
|
[{'version': 'v1', 'created': 'Sat, 16 Nov 2013 14:19:41 GMT'}
{'version': 'v2', 'created': 'Sun, 8 Dec 2013 16:57:12 GMT'}]
|
2013-12-10
|
[array(['Krivoshein', 'Aleksander V.', ''], dtype=object)
array(['Lebedeva', 'Elena A.', ''], dtype=object)]
|
2,760 |
cond-mat/9807418
|
Martin Fuchs
|
Martin Fuchs and Matthias Scheffler
|
Ab initio pseudopotentials for electronic structure calculations of
poly-atomic systems using density-functional theory
|
44 pages, 5 Postscript figures, epsfig, elsart, psfrag, submitted to
Comput. Phys. Commun. Other related publications can be found at
http://www.rz-berlin.mpg.de/th/paper.html
| null |
10.1016/S0010-4655(98)00201-X
| null |
cond-mat.mtrl-sci
| null |
The package fhi98PP allows one to generate norm-conserving pseudopotentials
adapted to density-functional theory total-energy calculations for a multitude
of elements throughout the periodic table, including first-row and transition
metal elements. The package also facilitates a first assessment of the
pseudopotentials' transferability, either in semilocal or fully separable form,
by means of simple tests carried out for the free atom. Various
parameterizations of the local-density approximation and the generalized
gradient approximation for exchange and correlation are implemented.
|
[{'version': 'v1', 'created': 'Fri, 31 Jul 1998 13:34:59 GMT'}]
|
2009-10-31
|
[array(['Fuchs', 'Martin', ''], dtype=object)
array(['Scheffler', 'Matthias', ''], dtype=object)]
|
2,761 |
0706.2710
|
John C. Lattanzio
|
Peter P. Eggleton, David S. P. Dearborn, John C. Lattanzio
|
Compulsory Deep Mixing of 3He and CNO Isotopes in the Envelopes of
low-mass Red Giants
|
Final accepted version (submitted to Astrophys J in Jan 2007...)
|
AIPConf.Proc.948:27-34,2007
|
10.1063/1.2818983
| null |
astro-ph
| null |
Three-dimensional stellar modeling has enabled us to identify a deep-mixing
mechanism that must operate in all low mass giants. This mixing process is not
optional, and is driven by a molecular weight inversion created by the
3He(3He,2p)4He reaction. In this paper we characterize the behavior of this
mixing, and study its impact on the envelope abundances. It not only eliminates
the problem of 3He overproduction, reconciling stellar and big bang
nucleosynthesis with observations, but solves the discrepancy between observed
and calculated CNO isotope ratios in low mass giants, a problem of more than 3
decades' standing. This mixing mechanism, which we call `$\delta\mu$-mixing',
operates rapidly (relative to the nuclear timescale of overall evolution, ~
10^8 yrs) once the hydrogen burning shell approaches the material homogenized
by the surface convection zone. In agreement with observations, Pop I stars
between 0.8 and 2.0$\Msun$ develop 12C/13C ratios of 14.5 +/- 1.5, while Pop II
stars process the carbon to ratios of 4.0 +/- 0.5. In stars less than
1.25$\Msun$, this mechanism also destroys 90% to 95% of the 3He produced on the
main sequence.
|
[{'version': 'v1', 'created': 'Tue, 19 Jun 2007 05:25:57 GMT'}
{'version': 'v2', 'created': 'Thu, 29 Nov 2007 23:30:24 GMT'}]
|
2008-11-26
|
[array(['Eggleton', 'Peter P.', ''], dtype=object)
array(['Dearborn', 'David S. P.', ''], dtype=object)
array(['Lattanzio', 'John C.', ''], dtype=object)]
|
2,762 |
2007.06703
|
Shangtong Zhang
|
Shangtong Zhang, Vivek Veeriah, Shimon Whiteson
|
Learning Retrospective Knowledge with Reverse Reinforcement Learning
|
NeurIPS 2020
| null | null | null |
cs.LG cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a Reverse Reinforcement Learning (Reverse RL) approach for
representing retrospective knowledge. General Value Functions (GVFs) have
enjoyed great success in representing predictive knowledge, i.e., answering
questions about possible future outcomes such as "how much fuel will be
consumed in expectation if we drive from A to B?". GVFs, however, cannot answer
questions like "how much fuel do we expect a car to have given it is at B at
time $t$?". To answer this question, we need to know when that car had a full
tank and how that car came to B. Since such questions emphasize the influence
of possible past events on the present, we refer to their answers as
retrospective knowledge. In this paper, we show how to represent retrospective
knowledge with Reverse GVFs, which are trained via Reverse RL. We demonstrate
empirically the utility of Reverse GVFs in both representation learning and
anomaly detection.
|
[{'version': 'v1', 'created': 'Thu, 9 Jul 2020 20:56:22 GMT'}
{'version': 'v2', 'created': 'Sun, 18 Oct 2020 16:41:12 GMT'}
{'version': 'v3', 'created': 'Sun, 1 Nov 2020 18:12:00 GMT'}]
|
2020-11-03
|
[array(['Zhang', 'Shangtong', ''], dtype=object)
array(['Veeriah', 'Vivek', ''], dtype=object)
array(['Whiteson', 'Shimon', ''], dtype=object)]
|
2,763 |
2001.05643
|
Saeed Amirgholipour Kasmani
|
Saeed Amirgholipour, Xiangjian He, Wenjing Jia, Dadong Wang, and Lei
Liu
|
PDANet: Pyramid Density-aware Attention Net for Accurate Crowd Counting
| null | null | null | null |
cs.CV cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Crowd counting, i.e., estimating the number of people in a crowded area, has
attracted much interest in the research community. Although many attempts have
been reported, crowd counting remains an open real-world problem due to the
vast scale variations in crowd density within the interested area, and severe
occlusion among the crowd. In this paper, we propose a novel Pyramid
Density-Aware Attention-based network, abbreviated as PDANet, that leverages
the attention, pyramid scale feature and two branch decoder modules for
density-aware crowd counting. The PDANet utilizes these modules to extract
different scale features, focus on the relevant information, and suppress the
misleading ones. We also address the variation of crowdedness levels among
different images with an exclusive Density-Aware Decoder (DAD). For this
purpose, a classifier evaluates the density level of the input features and
then passes them to the corresponding high and low crowded DAD modules.
Finally, we generate an overall density map by considering the summation of low
and high crowded density maps as spatial attention. Meanwhile, we employ two
losses to create a precise density map for the input scene. Extensive
evaluations conducted on the challenging benchmark datasets well demonstrate
the superior performance of the proposed PDANet in terms of the accuracy of
counting and generated density maps over the well-known state of the arts.
|
[{'version': 'v1', 'created': 'Thu, 16 Jan 2020 04:26:05 GMT'}
{'version': 'v10', 'created': 'Wed, 29 Apr 2020 03:04:05 GMT'}
{'version': 'v2', 'created': 'Wed, 22 Jan 2020 05:25:17 GMT'}
{'version': 'v3', 'created': 'Wed, 22 Jan 2020 05:29:56 GMT'}
{'version': 'v4', 'created': 'Wed, 29 Jan 2020 05:31:50 GMT'}
{'version': 'v5', 'created': 'Tue, 25 Feb 2020 05:56:25 GMT'}
{'version': 'v6', 'created': 'Tue, 25 Feb 2020 05:57:54 GMT'}
{'version': 'v7', 'created': 'Thu, 26 Mar 2020 02:44:49 GMT'}
{'version': 'v8', 'created': 'Sat, 4 Apr 2020 12:20:18 GMT'}
{'version': 'v9', 'created': 'Wed, 15 Apr 2020 02:21:27 GMT'}]
|
2020-04-30
|
[array(['Amirgholipour', 'Saeed', ''], dtype=object)
array(['He', 'Xiangjian', ''], dtype=object)
array(['Jia', 'Wenjing', ''], dtype=object)
array(['Wang', 'Dadong', ''], dtype=object)
array(['Liu', 'Lei', ''], dtype=object)]
|
2,764 |
1906.06944
|
Jesus Maria Sanz-Serna
|
J.M. Sanz-Serna and Beibei Zhu
|
Word-series high-order averaging of highly oscillatory differential
equations with delay
| null | null | null | null |
math.DS cs.NA math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that, for appropriate combinations of the values of the delay and the
forcing frequency, it is possible to obtain easily high-order averaged versions
of periodically forced systems of delay differential equations with constant
delay. Our approach is based on the use of word-series techniques to obtain
high-order averaged equations for differential equations without delay.
|
[{'version': 'v1', 'created': 'Mon, 17 Jun 2019 10:59:03 GMT'}]
|
2019-06-18
|
[array(['Sanz-Serna', 'J. M.', ''], dtype=object)
array(['Zhu', 'Beibei', ''], dtype=object)]
|
2,765 |
2006.01521
|
Peter Hansbo
|
Erik Burman and Peter Hansbo and Mats G. Larson
|
A cut finite element method for a model of pressure in fractured media
| null | null | null | null |
math.NA cs.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We develop a robust cut finite element method for a model of diffusion in
fractured media consisting of a bulk domain with embedded cracks. The crack has
its own pressure field and can cut through the bulk mesh in a very general
fashion. Starting from a common background bulk mesh, that covers the domain,
finite element spaces are constructed for the interface and bulk subdomains
leading to efficient computations of the coupling terms. The crack pressure
field also uses the bulk mesh for its representation. The interface conditions
are a generalized form of conditions of Robin type previously considered in the
literature which allows the modeling of a range of flow regimes across the
fracture. The method is robust in the following way: 1. Stability of the
formulation in the full range of parameter choices; and 2. Not sensitive to the
location of the interface in the background mesh. We derive an optimal order a
priori error estimate and present illustrating numerical examples.
|
[{'version': 'v1', 'created': 'Tue, 2 Jun 2020 11:07:00 GMT'}]
|
2020-06-03
|
[array(['Burman', 'Erik', ''], dtype=object)
array(['Hansbo', 'Peter', ''], dtype=object)
array(['Larson', 'Mats G.', ''], dtype=object)]
|
2,766 |
hep-ph/9702425
|
Naoto Tsutsui
|
Michihiro Hirata, Naoto Tsutsui
|
Phenomenological interaction between current quarks
|
18 pages, LaTeX
|
Phys.Rev. D56 (1997) 5696-5702
|
10.1103/PhysRevD.56.5696
|
HUPD-9703
|
hep-ph
| null |
We construct a phenomenological model which describes the dynamical chiral
symmetry breaking (DCSB) of QCD vacuum and reproduces meson spectra. Quark
condensates, the pion decay constant, and meson spectra are well reproduced by
phenomenological interaction which consists of a linear confining potential, a
Coulombic potential, and the 't Hooft determinant interaction. In this model,
the 't Hooft determinant interaction plays a important role not to only
\eta,\eta' mass difference, but other meson masses through DCSB.
|
[{'version': 'v1', 'created': 'Wed, 26 Feb 1997 13:24:11 GMT'}]
|
2009-10-30
|
[array(['Hirata', 'Michihiro', ''], dtype=object)
array(['Tsutsui', 'Naoto', ''], dtype=object)]
|
2,767 |
1911.02679
|
Tiago Massoni
|
Marzina Vidal and Tiago Massoni and Franklin Ramalho
|
A Domain-Specific Language for Verifying Software Requirement
Constraints
|
Preprint for the 2019 Brazilian Symposium on Formal Methods
| null | null | null |
cs.SE
|
http://creativecommons.org/licenses/by/4.0/
|
Software requirement analysis can certainly benefit from prevention and early
detection of failures, in particular by some kind of automatic analysis. Formal
methods offer means to represent and analyze requirements with rigorous tools,
avoiding ambiguities and allowing automatic verification of requirement
consistency. However, formalisms often clash in the culture or lack of skills
of software analysts, making them challenging to apply. In this article, we
propose a Domain-Specific Language (DSL) based on Set Theory for requirement
analysts. The Graphical InvaRiant Language (GIRL) can be used to specify
software requirement structural invariants, with entities and their
relationships. Those invariants can then have their consistency evaluated by
the Alloy Analyzer, based on a mapping semantics we provide for transforming
GIRL models into Alloy specifications with no user intervention. With a
prototypical language editor and transformations implemented into an Eclipse
plugin, we carried out a qualitative study with requirement analysts working
for a government software company in Brazil, to evaluate usability and
effectiveness of the GIRL-based analysis of real software requirements. The
participants were able to effectively use the underlying formal analysis, since
79 out of 80 assigned invariants were correctly modeled. While participants
perceived as low the complexity of learning and using GIRL's simplest,
set-based structures and relationships, the most complex logical structures,
such as quantification and implication, were challenging. Furthermore, almost
all post-study evaluations from the participants were positive, especially as a
tool for discovering requirement inconsistencies.
|
[{'version': 'v1', 'created': 'Wed, 6 Nov 2019 23:37:27 GMT'}]
|
2019-11-11
|
[array(['Vidal', 'Marzina', ''], dtype=object)
array(['Massoni', 'Tiago', ''], dtype=object)
array(['Ramalho', 'Franklin', ''], dtype=object)]
|
2,768 |
1711.04202
|
Alejandro Lara
|
Alejandro Lara, Graciela Binimelis de Raga, Olivia Enr\'iquez-Rivera
(for the HAWC collaboration)
|
HAWC response to atmospheric electricity activity
|
Presented at the 35th International Cosmic Ray Conference (ICRC2017),
Bexco, Busan, Korea. See arXiv:1708.02572 for all HAWC contributions
| null | null |
HAWC-ICRC/2017/27
|
astro-ph.IM astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The HAWC Gamma Ray observatory consists of 300 water Cherenkov detectors
(WCD) instrumented with four photo multipliers tubes (PMT) per WCD. HAWC is
located between two of the highest mountains in Mexico. The high altitude (4100
m asl), the relatively short distance to the Gulf of Mexico (~100 km), the
large detecting area (22 000 m$^2$) and its high sensitivity, make HAWC a good
instrument to explore the acceleration of particles due to the electric fields
existing inside storm clouds. In particular, the scaler system of HAWC records
the output of each one of the 1200 PMTs as well as the 2, 3, and 4-fold
multiplicities (logic AND in a time window of 30 ns) of each WCD with a
sampling rate of 40 Hz. Using the scaler data, we have identified 20
enhancements of the observed rate during periods when storm clouds were over
HAWC but without cloud-earth discharges. These enhancements can be produced by
electrons with energy of tens of MeV, accelerated by the electric fields of
tens of kV/m measured at the site during the storm periods. In this work, we
present the recorded data, the method of analysis and our preliminary
conclusions on the electron acceleration by the electric fields inside the
clouds.
|
[{'version': 'v1', 'created': 'Sat, 11 Nov 2017 21:52:39 GMT'}]
|
2019-08-14
|
[array(['Lara', 'Alejandro', '', 'for the HAWC collaboration'],
dtype=object)
array(['de Raga', 'Graciela Binimelis', '', 'for the HAWC collaboration'],
dtype=object)
array(['Enríquez-Rivera', 'Olivia', '', 'for the HAWC collaboration'],
dtype=object) ]
|
2,769 |
astro-ph/0509485
|
Aliz Derekas
|
A. Derekas, L.L. Kiss, B. Csak, J. Griffin, C. Lindstrom, Sz.
Meszaros, P. Szekely, M.C.B. Ashley, T.R. Bedding
|
Binarity and multiperiodicity in high-amplitude delta Scuti stars
|
2 pages, conference proceedings, Workshop on Stellar Pulsation and
Evolution, Rome, June 2005
|
Mem.Soc.Ast.It.77:517-518,2006
| null | null |
astro-ph
| null |
We present our first results for a sample of southern high-amplitude delta
Scuti stars (HADS), based on a spectrophotometric survey started in 2003. For
CY Aqr and AD CMi, we found very stable light and radial velocity curves; we
confirmed the double-mode nature of ZZ Mic, BQ Ind and RY Lep. Finally, we
detected gamma-velocity changes in RS Gru and RY Lep
|
[{'version': 'v1', 'created': 'Fri, 16 Sep 2005 04:33:57 GMT'}]
|
2010-12-09
|
[array(['Derekas', 'A.', ''], dtype=object)
array(['Kiss', 'L. L.', ''], dtype=object)
array(['Csak', 'B.', ''], dtype=object)
array(['Griffin', 'J.', ''], dtype=object)
array(['Lindstrom', 'C.', ''], dtype=object)
array(['Meszaros', 'Sz.', ''], dtype=object)
array(['Szekely', 'P.', ''], dtype=object)
array(['Ashley', 'M. C. B.', ''], dtype=object)
array(['Bedding', 'T. R.', ''], dtype=object)]
|
2,770 |
2009.00209
|
Zhiqi Tang
|
Zhiqi Tang, Rita Cunha, Tarek Hamel, Carlos Silvestre
|
Bearing-only formation control under persistence of excitation
| null | null |
10.1109/CDC42340.2020.9304210
| null |
eess.SY cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper addresses the problem of bearing-only formation control in
$d~(d\geq 2)$-dimensional space by exploring persistence of excitation (PE) of
the desired bearing reference. By defining a desired formation that is bearing
PE, distributed bearing-only control laws are proposed, which guarantee
exponential stabilization of the desired formation only up to a translation
vector. The key outcome of this approach relies in exploiting the bearing PE to
significantly relax the conditions imposed on the graph topology to ensure
exponential stabilization, when compared to the bearing rigidity conditions,
and to remove the scale ambiguity introduced by bearing vectors. Simulation
results are provided to illustrate the performance of the proposed control
method.
|
[{'version': 'v1', 'created': 'Tue, 1 Sep 2020 03:37:35 GMT'}]
|
2021-04-13
|
[array(['Tang', 'Zhiqi', ''], dtype=object)
array(['Cunha', 'Rita', ''], dtype=object)
array(['Hamel', 'Tarek', ''], dtype=object)
array(['Silvestre', 'Carlos', ''], dtype=object)]
|
2,771 |
1903.02165
|
Jon McCormack
|
Dilpreet Singh, Nina Rajcic, Simon Colton and Jon McCormack
|
Camera Obscurer: Generative Art for Design Inspiration
|
Accepted for EvoMUSART 2019: 8th International Conference on
Computational Intelligence in Music, Sound, Art and Design. April 2019,
Leipzig, Germany
| null | null | null |
cs.MM cs.CV cs.NE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate using generated decorative art as a source of inspiration for
design tasks. Using a visual similarity search for image retrieval, the
\emph{Camera Obscurer} app enables rapid searching of tens of thousands of
generated abstract images of various types. The seed for a visual similarity
search is a given image, and the retrieved generated images share some visual
similarity with the seed. Implemented in a hand-held device, the app empowers
users to use photos of their surroundings to search through the archive of
generated images and other image archives. Being abstract in nature, the
retrieved images supplement the seed image rather than replace it, providing
different visual stimuli including shapes, colours, textures and
juxtapositions, in addition to affording their own interpretations. This
approach can therefore be used to provide inspiration for a design task, with
the abstract images suggesting new ideas that might give direction to a graphic
design project. We describe a crowdsourcing experiment with the app to estimate
user confidence in retrieved images, and we describe a pilot study where Camera
Obscurer provided inspiration for a design task. These experiments have enabled
us to describe future improvements, and to begin to understand sources of
visual inspiration for design tasks.
|
[{'version': 'v1', 'created': 'Wed, 6 Mar 2019 04:05:47 GMT'}]
|
2019-03-07
|
[array(['Singh', 'Dilpreet', ''], dtype=object)
array(['Rajcic', 'Nina', ''], dtype=object)
array(['Colton', 'Simon', ''], dtype=object)
array(['McCormack', 'Jon', ''], dtype=object)]
|
2,772 |
2209.09481
|
Jure Dem\v{s}ar
|
Samo Pahor, Davorin Kopi\v{c}, Jure Dem\v{s}ar
|
Feature embedding in click-through rate prediction
|
25 pages, 8 figures, 7 tables
| null | null | null |
cs.LG
|
http://creativecommons.org/licenses/by/4.0/
|
We tackle the challenge of feature embedding for the purposes of improving
the click-through rate prediction process. We select three models: logistic
regression, factorization machines and deep factorization machines, as our
baselines and propose five different feature embedding modules: embedding
scaling, FM embedding, embedding encoding, NN embedding and the embedding
reweighting module. The embedding modules act as a way to improve baseline
model feature embeddings and are trained alongside the rest of the model
parameters in an end-to-end manner. Each module is individually added to a
baseline model to obtain a new augmented model. We test the predictive
performance of our augmented models on a publicly accessible dataset used for
benchmarking click-through rate prediction models. Our results show that
several proposed embedding modules provide an important increase in predictive
performance without a drastic increase in training time.
|
[{'version': 'v1', 'created': 'Tue, 20 Sep 2022 05:48:30 GMT'}]
|
2022-09-21
|
[array(['Pahor', 'Samo', ''], dtype=object)
array(['Kopič', 'Davorin', ''], dtype=object)
array(['Demšar', 'Jure', ''], dtype=object)]
|
2,773 |
2303.14375
|
Rui Zhang Zhang
|
Rui Zhang, Yajing Sun, Jingyuan Yang, Wei Peng
|
Knowledge-augmented Frame Semantic Parsing with Hybrid Prompt-tuning
|
accepted by ICASSP 2023
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Frame semantics-based approaches have been widely used in semantic parsing
tasks and have become mainstream. It remains challenging to disambiguate frame
representations evoked by target lexical units under different contexts.
Pre-trained Language Models (PLMs) have been used in semantic parsing and
significantly improve the accuracy of neural parsers. However, the PLMs-based
approaches tend to favor collocated patterns presented in the training data,
leading to inaccurate outcomes. The intuition here is to design a mechanism to
optimally use knowledge captured in semantic frames in conjunction with PLMs to
disambiguate frames. We propose a novel Knowledge-Augmented Frame Semantic
Parsing Architecture (KAF-SPA) to enhance semantic representation by
incorporating accurate frame knowledge into PLMs during frame semantic parsing.
Specifically, a Memory-based Knowledge Extraction Module (MKEM) is devised to
select accurate frame knowledge and construct the continuous templates in the
high dimensional vector space. Moreover, we design a Task-oriented Knowledge
Probing Module (TKPM) using hybrid prompts (in terms of continuous and discrete
prompts) to incorporate the selected knowledge into the PLMs and adapt PLMs to
the tasks of frame and argument identification. Experimental results on two
public FrameNet datasets demonstrate that our method significantly outperforms
strong baselines (by more than +3$\%$ in F1), achieving state-of-art results on
the current benchmark. Ablation studies verify the effectiveness of KAF-SPA.
|
[{'version': 'v1', 'created': 'Sat, 25 Mar 2023 06:41:19 GMT'}]
|
2023-03-28
|
[array(['Zhang', 'Rui', ''], dtype=object)
array(['Sun', 'Yajing', ''], dtype=object)
array(['Yang', 'Jingyuan', ''], dtype=object)
array(['Peng', 'Wei', ''], dtype=object)]
|
2,774 |
astro-ph/0602142
|
Enwei Liang
|
E. W. Liang, B. Zhang, P. T. O'Brien, R. Willingale, L. Angelini, D.
N. Burrows, S. Campana, G. Chincarini, A. Falcone, N. Gehrels, M. R. Goad, D.
Grupe, S. Kobayashi, P. M\'esz\'aros, J. A. Nousek, J. P. Osborne, K. L.
Page, G. Tagliaferri
|
Testing the Curvature Effect and Internal Origin of Gamma-Ray Burst
Prompt Emissions and X-ray Flares with Swift Data
|
17 pages total with 2 figures, version accepted for publication in
ApJ
|
Astrophys.J.646:351-357,2006
|
10.1086/504684
| null |
astro-ph
| null |
The X-ray light curves of many gamma-ray bursts (GRBs) observed by the Swift
X-Ray Telescope (XRT) have a very steep-decay component (tail) following the
prompt gamma-rays in the early phase and have some erratic flares occurring at
a time from ~10^2 up to ~10^5 seconds. Based on the assumption that these tails
and flares are of internal shock origin and that their decline behaviors are
dominated by the curvature effect of the fireball, we present a
self-consistency test for this scenario with a sample of 36
prompt-emission-tails/flare-tails in 22 GRB XRT light curves. Our results show
that the t0 of the prompt emission tails and the tails of well-separated flares
are usually at the rising segment of the last pulse of the prompt emission or
the corresponding X-ray flare, being self-consistent with the expectation of
the internal dissipation models for the prompt emission and X-ray flares. Our
results indicate that each X-ray flare forms a distinct new episode of central
engine activity and the GRB central engine remains active after the prompt
emission is over, sometimes up to ~1 day after the GRB trigger (e.g. GRB
050502B & GRB 050724). This challenges the conventional central engine models
and calls for new ideas to re-start the central engine. We further show that
the on-set time of the late central engine activity does not depend on the GRB
duration. We also identify a minority group of GRBs whose combined BAT-XRT
light curves are smoothly connected without an abrupt transition between the
prompt emission and the afterglow. These GRBs may have an external origin for
both the prompt emission and the afterglow.
|
[{'version': 'v1', 'created': 'Tue, 7 Feb 2006 00:01:49 GMT'}
{'version': 'v2', 'created': 'Sun, 26 Mar 2006 19:41:35 GMT'}]
|
2010-03-19
|
[array(['Liang', 'E. W.', ''], dtype=object)
array(['Zhang', 'B.', ''], dtype=object)
array(["O'Brien", 'P. T.', ''], dtype=object)
array(['Willingale', 'R.', ''], dtype=object)
array(['Angelini', 'L.', ''], dtype=object)
array(['Burrows', 'D. N.', ''], dtype=object)
array(['Campana', 'S.', ''], dtype=object)
array(['Chincarini', 'G.', ''], dtype=object)
array(['Falcone', 'A.', ''], dtype=object)
array(['Gehrels', 'N.', ''], dtype=object)
array(['Goad', 'M. R.', ''], dtype=object)
array(['Grupe', 'D.', ''], dtype=object)
array(['Kobayashi', 'S.', ''], dtype=object)
array(['Mészáros', 'P.', ''], dtype=object)
array(['Nousek', 'J. A.', ''], dtype=object)
array(['Osborne', 'J. P.', ''], dtype=object)
array(['Page', 'K. L.', ''], dtype=object)
array(['Tagliaferri', 'G.', ''], dtype=object)]
|
2,775 |
1105.1673
|
Gal Matijevic
|
G. Matijevic, T. Zwitter, O. Bienayme, J. Bland-Hawthorn, K. C.
Freeman, G. Gilmore, E. K. Grebel, A. Helmi, U.Munari, J. F. Navarro, Q. A.
Parker, W. Reid, G. M. Seabroke, A. Siebert, A. Siviero, M. Steinmetz, F. G.
Watson, M. Williams, and R. F. G. Wyse
|
Single-lined Spectroscopic Binary Star Candidates in the RAVE Survey
|
10 pages, 7 figures, accepted for publication in AJ
| null |
10.1088/0004-6256/141/6/200
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Repeated spectroscopic observations of stars in the Radial Velocity
Experiment (RAVE) database are used to identify and examine single-lined binary
(SB1) candidates. The RAVE latest internal database (VDR3) includes radial
velocities, atmospheric and other parameters for approximately quarter million
of different stars with little less than 300,000 observations. In the sample of
~20,000 stars observed more than once, 1333 stars with variable radial
velocities were identified. Most of them are believed to be SB1 candidates. The
fraction of SB1 candidates among stars with several observations is between 10%
and 15% which is the lower limit for binarity among RAVE stars. Due to the
distribution of time spans between the re-observation that is biased towards
relatively short timescales (days to weeks), the periods of the identified SB1
candidates are most likely in the same range. Because of the RAVE's narrow
magnitude range most of the dwarf candidates belong to the thin Galactic disk
while the giants are part of the thick disk with distances extending to up to a
few kpc. The comparison of the list of SB1 candidates to the VSX catalog of
variable stars yielded several pulsating variables among the giant population
with the radial velocity variations of up to few tens of km/s. There are 26
matches between the catalog of spectroscopic binary orbits (SB9) and the whole
RAVE sample for which the given periastron time and the time of RAVE
observation were close enough to yield a reliable comparison. RAVE measurements
of radial velocities of known spectroscopic binaries are consistent with their
published radial velocity curves.
|
[{'version': 'v1', 'created': 'Mon, 9 May 2011 14:06:59 GMT'}]
|
2015-05-28
|
[array(['Matijevic', 'G.', ''], dtype=object)
array(['Zwitter', 'T.', ''], dtype=object)
array(['Bienayme', 'O.', ''], dtype=object)
array(['Bland-Hawthorn', 'J.', ''], dtype=object)
array(['Freeman', 'K. C.', ''], dtype=object)
array(['Gilmore', 'G.', ''], dtype=object)
array(['Grebel', 'E. K.', ''], dtype=object)
array(['Helmi', 'A.', ''], dtype=object)
array(['Munari', 'U.', ''], dtype=object)
array(['Navarro', 'J. F.', ''], dtype=object)
array(['Parker', 'Q. A.', ''], dtype=object)
array(['Reid', 'W.', ''], dtype=object)
array(['Seabroke', 'G. M.', ''], dtype=object)
array(['Siebert', 'A.', ''], dtype=object)
array(['Siviero', 'A.', ''], dtype=object)
array(['Steinmetz', 'M.', ''], dtype=object)
array(['Watson', 'F. G.', ''], dtype=object)
array(['Williams', 'M.', ''], dtype=object)
array(['Wyse', 'R. F. G.', ''], dtype=object)]
|
2,776 |
0902.3101
|
Paolo Aniello
|
Paolo Aniello
|
Star products: a group-theoretical point of view
|
42 pages; conclusions added; a few references added
|
J.Phys.A42:475210,2009
|
10.1088/1751-8113/42/47/475210
| null |
math-ph math.MP quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Adopting a purely group-theoretical point of view, we consider the star
product of functions which is associated, in a natural way, with a square
integrable (in general, projective) representation of a locally compact group.
Next, we show that for this (implicitly defined) star product explicit formulae
can be provided. Two significant examples are studied in detail: the group of
translations on phase space and the one-dimensional affine group. The study of
the first example leads to the Groenewold-Moyal star product. In the second
example, the link with wavelet analysis is clarified.
|
[{'version': 'v1', 'created': 'Wed, 18 Feb 2009 11:12:24 GMT'}
{'version': 'v2', 'created': 'Tue, 7 Apr 2009 10:39:02 GMT'}]
|
2009-11-13
|
[array(['Aniello', 'Paolo', ''], dtype=object)]
|
2,777 |
1402.4735
|
Daniel Whiteson
|
Pierre Baldi, Peter Sadowski, Daniel Whiteson
|
Searching for Exotic Particles in High-Energy Physics with Deep Learning
|
Accepted by Nature Communications. Added link to deep learning code
| null |
10.1038/ncomms5308
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Collisions at high-energy particle colliders are a traditionally fruitful
source of exotic particle discoveries. Finding these rare particles requires
solving difficult signal-versus-background classification problems, hence
machine learning approaches are often used. Standard approaches have relied on
`shallow' machine learning models that have a limited capacity to learn complex
non-linear functions of the inputs, and rely on a pain-staking search through
manually constructed non-linear features. Progress on this problem has slowed,
as a variety of techniques have shown equivalent performance. Recent advances
in the field of deep learning make it possible to learn more complex functions
and better discriminate between signal and background classes. Using benchmark
datasets, we show that deep learning methods need no manually constructed
inputs and yet improve the classification metric by as much as 8\% over the
best current approaches. This demonstrates that deep learning approaches can
improve the power of collider searches for exotic particles.
|
[{'version': 'v1', 'created': 'Wed, 19 Feb 2014 17:20:08 GMT'}
{'version': 'v2', 'created': 'Thu, 5 Jun 2014 16:59:45 GMT'}]
|
2015-06-18
|
[array(['Baldi', 'Pierre', ''], dtype=object)
array(['Sadowski', 'Peter', ''], dtype=object)
array(['Whiteson', 'Daniel', ''], dtype=object)]
|
2,778 |
1611.01234
|
Tao An
|
T. An, B.-Q. Lao, W. Zhao, P. Mohan, X.-P. Cheng, Y.-Z. Cui, Z.-L.
Zhang
|
Parsec-scale jet properties of the gamma-ray quasar 3C 286
|
9 pages, 4 figures, accept for publication in MNRAS
| null |
10.1093/mnras/stw2887
| null |
astro-ph.GA astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The quasar 3C~286 is one of two compact steep spectrum sources detected by
the {\it Fermi}/LAT. Here, we investigate the radio properties of the
parsec(pc)-scale jet and its (possible) association with the $\gamma$-ray
emission in 3C~286. The Very Long Baseline Interferometry (VLBI) images at
various frequencies reveal a one-sided core--jet structure extending to the
southwest at a projected distance of $\sim$1 kpc. The component at the jet base
showing an inverted spectrum is identified as the core, with a mean brightness
temperature of $2.8\times 10^{9}$~K. The jet bends at about 600 pc (in
projection) away from the core, from a position angle of $-135^\circ$ to
$-115^\circ$. Based on the available VLBI data, we inferred the proper motion
speed of the inner jet as $0.013 \pm 0.011$ mas yr$^{-1}$ ($\beta_{\rm app} =
0.6 \pm 0.5$), corresponding to a jet speed of about $0.5\,c$ at an inclination
angle of $48^\circ$ between the jet and the line of sight of the observer. The
brightness temperature, jet speed and Lorentz factor are much lower than those
of $\gamma$-ray-emitting blazars, implying that the pc-scale jet in 3C~286 is
mildly relativistic. Unlike blazars in which $\gamma$-ray emission is in
general thought to originate from the beamed innermost jet, the location and
mechanism of $\gamma$-ray emission in 3C~286 may be different as indicated by
the current radio data. Multi-band spectrum fitting may offer a complementary
diagnostic clue of the $\gamma$-ray production mechanism in this source.
|
[{'version': 'v1', 'created': 'Fri, 4 Nov 2016 01:05:46 GMT'}
{'version': 'v2', 'created': 'Wed, 9 Nov 2016 13:51:49 GMT'}]
|
2016-11-10
|
[array(['An', 'T.', ''], dtype=object)
array(['Lao', 'B. -Q.', ''], dtype=object)
array(['Zhao', 'W.', ''], dtype=object)
array(['Mohan', 'P.', ''], dtype=object)
array(['Cheng', 'X. -P.', ''], dtype=object)
array(['Cui', 'Y. -Z.', ''], dtype=object)
array(['Zhang', 'Z. -L.', ''], dtype=object)]
|
2,779 |
1907.06383
|
Francisco Lazaro
|
Francisco L\'azaro, \v{C}edomir Stefanovi\'c, Petar Popovski
|
Reliability-Latency Performance of Frameless ALOHA with and without
Feedback
|
Accepted for publication in IEEE Transactions on Communications
| null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper presents a finite length analysis of multi-slot type frameless
ALOHA based on a dynamic programming approach. The analysis is exact, but its
evaluation is only feasible for moderate number of users due to the
computational complexity. The analysis is then extended to derive continuous
approximations of its key parameters, which, apart from providing an insight
into the decoding process, make it possible to estimate the packet error rate
with very low computational complexity. Finally, a feedback scheme is presented
in which the slot access scheme is dynamically adapted according to the
approximate analysis in order to minimize the packet error rate. The results
indicate that the introduction of feedback can substantially improve the
performance of frameless ALOHA
|
[{'version': 'v1', 'created': 'Mon, 15 Jul 2019 09:20:55 GMT'}
{'version': 'v2', 'created': 'Mon, 6 Jul 2020 07:28:37 GMT'}]
|
2020-07-07
|
[array(['Lázaro', 'Francisco', ''], dtype=object)
array(['Stefanović', 'Čedomir', ''], dtype=object)
array(['Popovski', 'Petar', ''], dtype=object)]
|
2,780 |
1208.6032
|
B\'arbara Costa Silva
|
B\'arbara Costa and Aron Simis
|
New Constructions of Cremona Maps
| null | null | null | null |
math.AC math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
One defines two ways of constructing rational maps derived from other
rational maps, in a characteristic-free context. The first introduces the
Newton complementary dual of a rational map. One main result is that this dual
preserves birationality and gives an involutional map of the Cremona group to
itself that restricts to the monomial Cremona subgroup and preserves de
Jonqui\`eres maps. In the monomial restriction this duality commutes with
taking inverse in the group, but is a not a group homomorphism. The second
construction is an iterative process to obtain rational maps in increasing
dimension. Starting with birational maps, it leads to rational maps whose
topological degree is under control. Making use of monoids, the resulting
construct is in fact birational if the original map is so. A variation of this
idea is considered in order to preserve properties of the base ideal, such as
Cohen--Macaulayness. Combining the two methods, one is able to produce explicit
infinite families of Cohen--Macaulay Cremona maps with prescribed dimension,
codimension and degree.
|
[{'version': 'v1', 'created': 'Wed, 29 Aug 2012 21:40:41 GMT'}]
|
2012-08-31
|
[array(['Costa', 'Bárbara', ''], dtype=object)
array(['Simis', 'Aron', ''], dtype=object)]
|
2,781 |
1311.0399
|
Sam Greenbury
|
Sam F. Greenbury, Iain G. Johnston, Ard A. Louis, Sebastian E. Ahnert
|
A tractable genotype-phenotype map for the self-assembly of protein
quaternary structure
|
12 pages, 6 figures
| null | null | null |
q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The mapping between biological genotypes and phenotypes is central to the
study of biological evolution. Here we introduce a rich, intuitive, and
biologically realistic genotype-phenotype (GP) map, that serves as a model of
self-assembling biological structures, such as protein complexes, and remains
computationally and analytically tractable. Our GP map arises naturally from
the self-assembly of polyomino structures on a 2D lattice and exhibits a number
of properties: $\textit{redundancy}$ (genotypes vastly outnumber phenotypes),
$\textit{phenotype bias}$ (genotypic redundancy varies greatly between
phenotypes), $\textit{genotype component disconnectivity}$ (phenotypes consist
of disconnected mutational networks) and $\textit{shape space covering}$ (most
phenotypes can be reached in a small number of mutations). We also show that
the mutational robustness of phenotypes scales very roughly logarithmically
with phenotype redundancy and is positively correlated with phenotypic
evolvability. Although our GP map describes the assembly of disconnected
objects, it shares many properties with other popular GP maps for connected
units, such as models for RNA secondary structure or the HP lattice model for
protein tertiary structure. The remarkable fact that these important properties
similarly emerge from such different models suggests the possibility that
universal features underlie a much wider class of biologically realistic GP
maps.
|
[{'version': 'v1', 'created': 'Sat, 2 Nov 2013 17:50:50 GMT'}]
|
2013-11-05
|
[array(['Greenbury', 'Sam F.', ''], dtype=object)
array(['Johnston', 'Iain G.', ''], dtype=object)
array(['Louis', 'Ard A.', ''], dtype=object)
array(['Ahnert', 'Sebastian E.', ''], dtype=object)]
|
2,782 |
2109.04180
|
Jean-Luc Lehners
|
George Lavrelashvili and Jean-Luc Lehners
|
Scalar Lumps with Two Horizons
|
32 pages, 13 figures, v2: replaced with published version
| null |
10.1103/PhysRevD.105.024051
| null |
gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study generalisations of the Schwarzschild-de Sitter solution in the
presence of a scalar field with a potential barrier. These static, spherically
symmetric solutions have two horizons, in between which the scalar interpolates
at least once across the potential barrier, thus developing a lump. In part, we
recover solutions discussed earlier in the literature and for those we clarify
their properties. But we also find a new class of solutions in which the scalar
lump curves the spacetime sufficiently strongly so as to change the nature of
the erstwhile cosmological horizon into an additional trapped horizon,
resulting in a scalar lump surrounded by two black holes. These new solutions
appear in a wide range of the parameter space of the potential. We also discuss
(challenges for) the application of all of these solutions to black hole seeded
vacuum decay.
|
[{'version': 'v1', 'created': 'Thu, 9 Sep 2021 11:35:50 GMT'}
{'version': 'v2', 'created': 'Mon, 24 Jan 2022 15:57:15 GMT'}]
|
2022-02-02
|
[array(['Lavrelashvili', 'George', ''], dtype=object)
array(['Lehners', 'Jean-Luc', ''], dtype=object)]
|
2,783 |
1704.06515
|
Oliver Buchmueller
|
Oliver Buchmueller, Albert De Roeck, Matthew McCullough, Kristian
Hahn, Kevin Sung, Pedro Schwaller, and Tien-Tien Yu
|
Simplified Models for Displaced Dark Matter Signatures
| null | null |
10.1007/JHEP09(2017)076
|
MITP/17-025, CERN-TH-2017-091
|
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a systematic programme to search for long-lived neutral particle
signatures through a minimal set of displaced searches requiring significant
missing transverse energy (dMETs).
Our approach is to extend the well-established dark matter simplified models
to include displaced vertices. The dark matter simplified models are used to
describe the primary production vertex. A displaced secondary vertex,
characterised by the mass of the long-lived particle and its lifetime, is added
for the displaced signature. We show how these models can be motivated by, and
mapped onto, complete models such as gauge-mediated SUSY breaking and models of
neutral naturalness. We also outline how this approach may be used to extend
other simplified models to incorporate displaced signatures and to characterise
searches for long-lived charged particles. Displaced vertices are a striking
signature with virtually no backgrounds from SM processes, and thus provide an
excellent target for the high-luminosity run of the Large Hadron Collider. The
proposed models and searches provide a first step towards a systematic
broadening of the displaced dark matter search programme.
|
[{'version': 'v1', 'created': 'Fri, 21 Apr 2017 12:56:06 GMT'}]
|
2017-10-25
|
[array(['Buchmueller', 'Oliver', ''], dtype=object)
array(['De Roeck', 'Albert', ''], dtype=object)
array(['McCullough', 'Matthew', ''], dtype=object)
array(['Hahn', 'Kristian', ''], dtype=object)
array(['Sung', 'Kevin', ''], dtype=object)
array(['Schwaller', 'Pedro', ''], dtype=object)
array(['Yu', 'Tien-Tien', ''], dtype=object)]
|
2,784 |
1801.05742
|
Wolfram Liebermeister
|
Wolfram Liebermeister
|
Flux cost functions and optimal metabolic states
| null | null | null | null |
q-bio.MN
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The metabolic fluxes in cells follow physical, biochemical, and economic
principles. Some flux balance analysis (FBA) methods trade flux benefit against
flux cost. However, if flux cost functions are linear and meant to describe
underlying enzyme costs, this entails that enzyme efficiencies are constant and
ignores the interplay between fluxes, metabolite concentrations and enzyme
levels in cells. Here I introduce realistic flux cost functions that describe
an "overhead cost", namely the minimum enzyme and metabolite cost associated
with the fluxes in a kinetic model. These flux cost functions have general
mathematical properties. Enzymatic flux cost functions, which represent enzyme
costs, scale proportionally with the flux profile and are concave on the flux
polytope. Kinetic flux cost functions represent the sum of enzyme and
metabolite costs. If two flux profiles are superimposed, their different
demands for metabolite concentrations cause an extra compromise cost, which
makes flux cost functions strictly concave in almost all cases. When fluxes
change their direction, the enzymatic cost jumps abruptly. Here I propose two
methods for flux modelling: Flux Cost Minimisation, a nonlinear variant of FBA
with flux minimisation, and Flux Benefit Optimisation, a nonlinear variant of
FBA with molecular crowding. The optimal flux profiles, at a given flux
benefit, are vertices of the flux polytope. Linear approximations of enzymatic
flux cost can be used in FBA. In contrast to flux costs chosen ad hoc, these
functions reflect the enzyme kinetics and extracellular concentrations in
realistic kinetic models. Based on enzymatic flux costs, we can describe the
cell growth rate as a convex function on the flux polytope and derive
growth-optimal metabolic states and statistical distributions for the fluxes in
cell populations.
|
[{'version': 'v1', 'created': 'Wed, 17 Jan 2018 16:40:45 GMT'}
{'version': 'v2', 'created': 'Tue, 4 Oct 2022 07:43:35 GMT'}]
|
2022-10-05
|
[array(['Liebermeister', 'Wolfram', ''], dtype=object)]
|
2,785 |
1606.05010
|
Ebrahim Karimi
|
Fr\'ed\'eric Bouchard, Hugo Larocque, Alison M. Yao, Christopher
Travis, Israel De Leon, Andrea Rubano, Ebrahim Karimi, Gian-Luca Oppo, and
Robert W. Boyd
|
Polarization shaping for control of nonlinear propagation
|
5 pages, and 4 figures
| null |
10.1103/PhysRevLett.117.233903
| null |
physics.optics physics.atom-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the nonlinear optical propagation of two different classes of
space-varying polarized light beams -- radially symmetric vector beams and
Poincar\'e beams with lemon and star topologies -- in a rubidium vapour cell.
Unlike Laguerre-Gauss and other types of beams that experience modulational
instabilities, we observe that their propagation is not marked by beam breakup
while still exhibiting traits such as nonlinear confinement and self-focusing.
Our results suggest that by tailoring the spatial structure of the
polarization, the effects of nonlinear propagation can be effectively
controlled. These findings provide a novel approach to transport high-power
light beams in nonlinear media with controllable distortions to their spatial
structure and polarization properties.
|
[{'version': 'v1', 'created': 'Wed, 15 Jun 2016 23:54:07 GMT'}]
|
2016-12-21
|
[array(['Bouchard', 'Frédéric', ''], dtype=object)
array(['Larocque', 'Hugo', ''], dtype=object)
array(['Yao', 'Alison M.', ''], dtype=object)
array(['Travis', 'Christopher', ''], dtype=object)
array(['De Leon', 'Israel', ''], dtype=object)
array(['Rubano', 'Andrea', ''], dtype=object)
array(['Karimi', 'Ebrahim', ''], dtype=object)
array(['Oppo', 'Gian-Luca', ''], dtype=object)
array(['Boyd', 'Robert W.', ''], dtype=object)]
|
2,786 |
hep-th/9707230
|
Bert Schroer
|
Bert Schroer (FU-Berlin)
|
A Course on: "An Algebraic Approach to Nonperturbative Quantum Field
Theory"
| null | null | null | null |
hep-th
| null |
The content of this paper is incorporated into hep-th/9805093
|
[{'version': 'v1', 'created': 'Mon, 28 Jul 1997 14:42:18 GMT'}
{'version': 'v2', 'created': 'Mon, 2 Mar 1998 22:26:43 GMT'}
{'version': 'v3', 'created': 'Fri, 15 May 1998 16:38:11 GMT'}]
|
2008-02-03
|
[array(['Schroer', 'Bert', '', 'FU-Berlin'], dtype=object)]
|
2,787 |
1511.06843
|
Carlos Garc\'ia-Azpeitia
|
Andres Contreras, Carlos Garc\'ia-Azpeitia
|
Global bifurcation of vortex and dipole solutions in Bose-Einstein
condensates
| null | null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Gross-Pitaevskii equation for a Bose-Einstein condensate (BEC) with
symmetric harmonic trap is given in (1). Periodic solutions of (1) play an
important role in the understanding of the long term behavior of its solutions.
In this note we prove the existence of several global branches of solutions to
(1) among which there are vortex solutions and dipole solutions.
|
[{'version': 'v1', 'created': 'Sat, 21 Nov 2015 05:57:58 GMT'}
{'version': 'v2', 'created': 'Sun, 20 Dec 2015 01:14:22 GMT'}
{'version': 'v3', 'created': 'Sat, 5 Mar 2016 15:23:08 GMT'}]
|
2016-03-08
|
[array(['Contreras', 'Andres', ''], dtype=object)
array(['García-Azpeitia', 'Carlos', ''], dtype=object)]
|
2,788 |
physics/0309027
|
Travis C. Brooks
|
Patricia A. Kreitz and Travis C. Brooks
|
Subject Access through Community Partnerships: A Case Study
|
17 Pages, Invited paper to be published in Science & Technology
Libraries
|
Sci.Tech.Libraries 24:153-172, 2003
| null |
SLAC-PUB-10125
|
physics.hist-ph physics.soc-ph
| null |
Innovations in scholarly communication have resulted in changing roles for
authors, publishers and libraries. Traditional roles are disappearing and
players are actively seeking or reluctantly assuming new roles. Library roles
are changing as they become involved in building and indexing electronic (e-)
repositories and support new modes of e-research. A library-run service, the
SPIRES particle physics databases, has not only weathered, but also lead, many
of the transitions that have shaped the landscape of epublishing and
e-research. This has been possible through an intense and in-depth partnership
with its user community. The strategies used and lessons learned can help other
libraries craft cost-effective roles in this new environment.
|
[{'version': 'v1', 'created': 'Wed, 3 Sep 2003 18:32:17 GMT'}]
|
2009-05-01
|
[array(['Kreitz', 'Patricia A.', ''], dtype=object)
array(['Brooks', 'Travis C.', ''], dtype=object)]
|
2,789 |
1711.11128
|
Nicholas Bender Mr.
|
Nicholas Bender, Hasan Yilmaz, Yaron Bromberg, Hui Cao
|
Customizing Speckle Intensity Statistics
| null |
Optica, Vol. 5, Issue 5, pp. 595-600 (2018)
|
10.1364/OPTICA.5.000595
| null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We develop a general method for customizing the intensity statistics of
speckle patterns on a target plane. By judiciously modulating the phase-front
of a monochromatic laser beam, we experimentally generate speckle patterns with
arbitrarily-tailored intensity probability-density functions. Relative to
Rayleigh speckles, our customized speckles exhibit radically different
topologies yet maintain the same spatial correlation length. The customized
speckles are fully developed, ergodic, and stationary: with circular
non-Gaussian statistics for the complex field. Propagating away from the target
plane, the customized speckles revert back to Rayleigh speckles. This work
provides a versatile framework for tailoring speckle patterns with varied
applications in microscopy, imaging and optical manipulation.
|
[{'version': 'v1', 'created': 'Wed, 29 Nov 2017 21:54:23 GMT'}
{'version': 'v2', 'created': 'Mon, 9 Apr 2018 15:53:14 GMT'}]
|
2019-03-12
|
[array(['Bender', 'Nicholas', ''], dtype=object)
array(['Yilmaz', 'Hasan', ''], dtype=object)
array(['Bromberg', 'Yaron', ''], dtype=object)
array(['Cao', 'Hui', ''], dtype=object)]
|
2,790 |
2107.12622
|
Philipp M. Mutter
|
Philipp M. Mutter and Guido Burkard
|
All-electrical control of hole singlet-triplet spin qubits at low
leakage points
|
12 pages, 7 figures
| null |
10.1103/PhysRevB.104.195421
| null |
cond-mat.mes-hall quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the effect of the spin-orbit interaction on heavy holes confined in
a double quantum dot in the presence of a magnetic field of arbitrary
direction. Rich physics arise as the two hole states of different spin are not
only coupled by the spin-orbit interaction but additionally by the effect of
site-dependent anisotropic $g$ tensors. It is demonstrated that these effects
may counteract in such a way as to cancel the coupling at certain detunings and
tilting angles of the magnetic field. This feature may be used in
singlet-triplet qubits to avoid leakage errors and implement an electrical
spin-orbit switch, suggesting the possibility of task-tailored two-axes
control. Additionally, we investigate systems with a strong spin-orbit
interaction at weak magnetic fields. By exact diagonalization of the dominant
Hamiltonian we find that the magnetic field may be chosen such that the qubit
ground state is mixed only within the logical subspace for realistic system
parameters, hence reducing leakage errors and providing reliable control over
the qubit.
|
[{'version': 'v1', 'created': 'Tue, 27 Jul 2021 06:34:26 GMT'}]
|
2021-12-01
|
[array(['Mutter', 'Philipp M.', ''], dtype=object)
array(['Burkard', 'Guido', ''], dtype=object)]
|
2,791 |
0706.0249
|
Branko Malesevic
|
Branko J. Malesevic, Ivana V. Jovovic
|
The Compositions of the Differential Operations and Gateaux Directional
Derivative
|
Available online at:
http://www.cs.uwaterloo.ca/journals/JIS/vol10.html
|
Journal of Integer Sequences, Vol.10 (2007), Article 07.8.2, 1-11
| null | null |
math.CO
| null |
In this paper we determine the number of the meaningful compositions of
higher order of the differential operations and Gateaux directional derivative.
|
[{'version': 'v1', 'created': 'Sat, 2 Jun 2007 19:48:08 GMT'}
{'version': 'v2', 'created': 'Tue, 5 Jun 2007 21:48:10 GMT'}]
|
2008-03-12
|
[array(['Malesevic', 'Branko J.', ''], dtype=object)
array(['Jovovic', 'Ivana V.', ''], dtype=object)]
|
2,792 |
hep-th/0610051
|
Alexander Vilenkin
|
Alexander Vilenkin
|
On cosmic natural selection
|
4 pages, no figures. Discussion of black hole nucleation expanded,
references added
| null | null | null |
hep-th astro-ph gr-qc
| null |
The rate of black hole formation can be increased by increasing the value of
the cosmological constant. This falsifies Smolin's conjecture that the values
of all constants of nature are adjusted to maximize black hole production.
|
[{'version': 'v1', 'created': 'Wed, 4 Oct 2006 16:09:57 GMT'}
{'version': 'v2', 'created': 'Mon, 27 Nov 2006 20:11:32 GMT'}]
|
2007-05-23
|
[array(['Vilenkin', 'Alexander', ''], dtype=object)]
|
2,793 |
1004.0628
|
Sergiu I. Vacaru
|
Sergiu I. Vacaru
|
Fractional Dynamics from Einstein Gravity, General Solutions, and Black
Holes
|
latex2e, 11pt, 40 pages with table of content
|
Int. J. Theor. Physics 51 (2012) 1338-1359
|
10.1007/s10773-011-1010-9
| null |
math-ph gr-qc hep-th math.DG math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the fractional gravity for spacetimes with non-integer dimensions.
Our constructions are based on a geometric formalism with the fractional Caputo
derivative and integral calculus adapted to nonolonomic distributions. This
allows us to define a fractional spacetime geometry with fundamental
geometric/physical objects and a generalized tensor calculus all being similar
to respective integer dimension constructions. Such models of fractional
gravity mimic the Einstein gravity theory and various Lagrange-Finsler and
Hamilton-Cartan generalizations in nonholonomic variables. The approach
suggests a number of new implications for gravity and matter field theories
with singular, stochastic, kinetic, fractal, memory etc processes. We prove
that the fractional gravitational field equations can be integrated in very
general forms following the anholonomic deformation method for constructing
exact solutions. Finally, we study some examples of fractional black hole
solutions, fractional ellipsoid gravitational configurations and imbedding of
such objects in fractional solitonic backgrounds.
|
[{'version': 'v1', 'created': 'Mon, 5 Apr 2010 13:26:58 GMT'}]
|
2012-04-20
|
[array(['Vacaru', 'Sergiu I.', ''], dtype=object)]
|
2,794 |
astro-ph/0006273
|
Marie-Noelle Celerier
|
Marie-No\"elle C\'el\'erier (Observatoire de Paris-Meudon)
|
SNIa data to probe the Cosmological Principle
|
4 LaTex pages, to be published in the Proceedings of the XXXVth
Rencontres de Moriond, Energy Densities in the Universe, Editions Frontieres,
2000
|
Proceedings of the XXXVth Rencontres de Moriond, Energy Densities
in the Universe, eds J. Tran Thanh Van, R. Ansari and Y. Giraud-Heraud (2002)
The Gioi Publishers (Vietnam), p.171-174
| null | null |
astro-ph
| null |
Recently collected SNIa data have been used to address the problem of
measuring the cosmological parameters of the universe. Analysed in the
framework of homogeneous models, they have yielded, as a primary result, a
strictly positive cosmological constant. However, a straight reading of the
published measurements, conducted with no a priori idea of which model would
best describe our universe, at least up to redshifts z=1, does not exclude the
possibility of ruling out the Cosmological Principle - and cosmological
constant - hypotheses. It is here shown how the large scale (in)homogeneity of
this part of the universe can be tested on our past light cone, using the
magnitude-redshift relation, provided sufficiently accurate data from sources
at redshifts approaching z=1 would be available.
|
[{'version': 'v1', 'created': 'Tue, 20 Jun 2000 10:01:54 GMT'}]
|
2007-05-23
|
[array(['Célérier', 'Marie-Noëlle', '', 'Observatoire de Paris-Meudon'],
dtype=object) ]
|
2,795 |
1005.5554
|
Fernando Pedraza
|
Youcef Hamlaoui (LEMMA), Fernando Pedraza (LEMMA), Lakhdar Tifouti
(LGE)
|
On the Corrosion Resistance of Porous Electroplated Zinc Coatings in
Different Corrosive Media
| null |
Corrosion Science 52, 2 (2010) 1883-1888
|
10.1016/j.corsci.2010.02.024
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The corrosion resistance of an electroplated (EP) Zn coating whose surface
was chemically etched to produce surface defects (pores) is investigated in
this work. Impedance and DC polarisation measururements were employed to study
the behaviour of such coating in various corrosive media (NaCl, NaOH and rain
water). Four different faradaic relaxation processes were clearly revealed in
different NaCl concentrations (from 0.1M to 1M). In the most concentrated
solutions at least three relaxation processes at low frequencies (LF) appeared
and were related to zinc deposition and dissolution. At lower concentrations
and depending on the pH, only one process was observed. The charge transfer
resistance (Rct) and the corrosion current (Icorr) were practically stable in
the pH range 5 to 10. In deaerated NaCl 0.1M, the EIS diagrams showed two
time-constants at very close frequencies. From the EIS diagrams the porous
nature of the coating was highlighted and showed that the dissolution
mechanisms occurred at the base of the pores.
|
[{'version': 'v1', 'created': 'Sun, 30 May 2010 18:11:04 GMT'}]
|
2010-06-01
|
[array(['Hamlaoui', 'Youcef', '', 'LEMMA'], dtype=object)
array(['Pedraza', 'Fernando', '', 'LEMMA'], dtype=object)
array(['Tifouti', 'Lakhdar', '', 'LGE'], dtype=object)]
|
2,796 |
physics/0204053
|
Byeonghoon Park
|
O'Dae Kwon, B.H. Park, J.Y. Kim, J. Bae, M.J. Kim (POSTECH, Korea),
J.C. Ahn and O.H. Kwon (Samsung Electronics Co.)
|
Photonic quantum-corral ring laser: A fermionic phase transition
|
14 pages, 3 figures
| null | null | null |
physics.optics
| null |
Extensive Bose-Einstein condensation research activities have recently led to
studies of fermionic atoms and optical confinements. Here we present a case of
micro-optical fermionic electron phase transition. Optically confined ordering
and phase transitions of a fermionic cloud in dynamic steady state are
associated with Rayleigh emissions from photonic quantum ring manifold which
are generated by nature without any ring lithography. The whispering gallery
modes, produced in a semiconductor Rayleigh-Fabry-Perot toroidal cavity at room
temperature, exhibit novel properties of ultralow thresholds open to
nano-ampere regime, thermal stabilities from square-root-T-dependent spectral
shift, and angularly varying intermode spacings. The photonic quantum ring
phenomena are associated with a photonic field-driven phase transition of
quantum-well-to-quantum-wire and hence the photonic (non-de Broglie) quantum
corral effect on the Rayleigh cavity-confined carriers in dynamic steady state.
Based upon the intra-cavity fermionic condensation we also offer a prospect for
an electrically driven few-quantum dot single photon source from the photonic
quantum ring laser for quantum information processors.
|
[{'version': 'v1', 'created': 'Thu, 18 Apr 2002 07:22:40 GMT'}]
|
2007-05-23
|
[array(['Kwon', "O'Dae", '', 'POSTECH, Korea'], dtype=object)
array(['Park', 'B. H.', '', 'POSTECH, Korea'], dtype=object)
array(['Kim', 'J. Y.', '', 'POSTECH, Korea'], dtype=object)
array(['Bae', 'J.', '', 'POSTECH, Korea'], dtype=object)
array(['Kim', 'M. J.', '', 'POSTECH, Korea'], dtype=object)
array(['Ahn', 'J. C.', '', 'Samsung Electronics Co.'], dtype=object)
array(['Kwon', 'O. H.', '', 'Samsung Electronics Co.'], dtype=object)]
|
2,797 |
1904.02905
|
Henri Riihim\"aki
|
Wojciech Chach\'olski, Henri Riihim\"aki
|
Metrics and stabilization in one parameter persistence
|
32 pages, 10 figures, appearing in SIAM Journal on Applied Algebra
and Geometry 4-1
| null | null | null |
math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a new way of thinking about one parameter persistence. We believe
topological persistence is fundamentally not about decomposition theorems but a
central role is played by a choice of metrics. Choosing a pseudometric between
persistent vector spaces leads to stabilization of discrete invariants. We
develop theory behind this stabilization and stable rank invariant. We give
evidence of the usefulness of this approach in concrete data analysis.
|
[{'version': 'v1', 'created': 'Fri, 5 Apr 2019 07:31:23 GMT'}
{'version': 'v2', 'created': 'Thu, 6 Feb 2020 09:59:03 GMT'}]
|
2020-02-07
|
[array(['Chachólski', 'Wojciech', ''], dtype=object)
array(['Riihimäki', 'Henri', ''], dtype=object)]
|
2,798 |
cond-mat/9911073
|
Plamen C. Ivanov
|
Plamen Ch. Ivanov, Armin Bunde, Lu\'is A. N. Amaral, Shlomo Havlin,
Janice Fritsch-Yelle, Roman M. Baevsky, H. Eugene Stanley, Ary L. Goldberger
|
Sleep-Wake Differences in Scaling Behavior of the Human Heartbeat:
Analysis of Terrestrial and Long-Term Space Flight Data
|
7 pages, 4 figures; to appear in Europhysics Letters, Dec. 99
| null |
10.1209/epl/i1999-00525-0
| null |
cond-mat.stat-mech q-bio
| null |
We compare scaling properties of the cardiac dynamics during sleep and wake
periods for healthy individuals, cosmonauts during orbital flight, and subjects
with severe heart disease. For all three groups, we find a greater degree of
anticorrelation in the heartbeat fluctuations during sleep compared to wake
periods. The sleep-wake difference in the scaling exponents for the three
groups is comparable to the difference between healthy and diseased
individuals. The observed scaling differences are not accounted for simply by
different levels of activity, but appear related to intrinsic changes in the
neuroautonomic control of the heartbeat.
|
[{'version': 'v1', 'created': 'Fri, 5 Nov 1999 02:46:18 GMT'}]
|
2016-08-15
|
[array(['Ivanov', 'Plamen Ch.', ''], dtype=object)
array(['Bunde', 'Armin', ''], dtype=object)
array(['Amaral', 'Luís A. N.', ''], dtype=object)
array(['Havlin', 'Shlomo', ''], dtype=object)
array(['Fritsch-Yelle', 'Janice', ''], dtype=object)
array(['Baevsky', 'Roman M.', ''], dtype=object)
array(['Stanley', 'H. Eugene', ''], dtype=object)
array(['Goldberger', 'Ary L.', ''], dtype=object)]
|
2,799 |
2011.02175
|
Herve Hocquard
|
Herv\'e Hocquard (LaBRI), Dimitri Lajou (LaBRI), Borut Lu{\v{z}}ar
(FMF)
|
Between proper and strong edge-colorings of subcubic graphs
| null | null |
10.1002/jgt.22848
| null |
cs.DM math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In a proper edge-coloring the edges of every color form a matching. A
matching is induced if the end-vertices of its edges induce a matching. A
strong edge-coloring is an edge-coloring in which the edges of every color form
an induced matching. We consider intermediate types of edge-colorings, where
edges of some colors are allowed to form matchings, and the remaining form
induced matchings. Our research is motivated by the conjecture proposed in a
recent paper of Gastineau and Togni on S-packing edge-colorings (On S-packing
edge-colorings of cubic graphs, Discrete Appl. Math. 259 (2019), 63-75)
asserting that by allowing three additional induced matchings, one is able to
save one matching color. We prove that every graph with maximum degree 3 can be
decomposed into one matching and at most 8 induced matchings, and two matchings
and at most 5 induced matchings. We also show that if a graph is in class I,
the number of induced matchings can be decreased by one, hence confirming the
above-mentioned conjecture for class I graphs.
|
[{'version': 'v1', 'created': 'Wed, 4 Nov 2020 08:28:06 GMT'}]
|
2022-07-12
|
[array(['Hocquard', 'Hervé', '', 'LaBRI'], dtype=object)
array(['Lajou', 'Dimitri', '', 'LaBRI'], dtype=object)
array(['Lu{ž}ar', 'Borut', '', 'FMF'], dtype=object)]
|
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