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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
7,100 |
hep-th/0005011
|
Olivier Piguet
|
Olivier Piguet
|
Ghost Equations and Diffeomorphism Invariant Theories
|
LaTex, 10 pages; sign corrected in eq. (3.9); added and completed
references
|
Class.Quant.Grav. 17 (2000) 3799-3806
|
10.1088/0264-9381/17/18/314
|
UFES-DF-OP2000/1
|
hep-th gr-qc
| null |
Four-dimensional Einstein gravity in the Palatini first order formalism is
shown to possess a vector supersymmetry of the same type as found in the
topological theories for Yang-Mills fields. A peculiar feature of the
gravitational theory, characterized by diffeomorphism invariance, is a direct
link of vector supersymmetry with the field equation of motion for the
Faddeev-Popov ghost of diffeomorphisms.
|
[{'version': 'v1', 'created': 'Mon, 1 May 2000 15:50:32 GMT'}
{'version': 'v2', 'created': 'Sun, 30 Jul 2000 20:33:03 GMT'}]
|
2009-10-31
|
[array(['Piguet', 'Olivier', ''], dtype=object)]
|
7,101 |
2002.11928
|
Chen Jiang
|
Chen Jiang, Haidong Liu
|
Boundedness of log pluricanonical representations of log Calabi-Yau
pairs in dimension 2
|
19 pages, comments are welcome
|
Alg. Number Th. 15 (2021) 545-567
|
10.2140/ant.2021.15.547
| null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show the boundedness of B-pluricanonical representations of lc log
Calabi-Yau pairs in dimension $2$. As applications, we prove the boundedness of
indices of slc log Calabi-Yau pairs up to dimension $3$ and that of non-klt lc
log Calabi-Yau pairs in dimension $4$.
|
[{'version': 'v1', 'created': 'Thu, 27 Feb 2020 05:49:25 GMT'}]
|
2021-04-21
|
[array(['Jiang', 'Chen', ''], dtype=object)
array(['Liu', 'Haidong', ''], dtype=object)]
|
7,102 |
1901.03888
|
Erion \c{C}ano
|
Erion \c{C}ano, Maurizio Morisio
|
Hybrid Recommender Systems: A Systematic Literature Review
|
38 pages, 9 figures, 14 tables. The final authenticated version is
available online at
https://content.iospress.com/articles/intelligent-data-analysis/ida163209
|
Intelligent Data Analysis, vol. 21, no. 6, pp. 1487-1524, 2017
|
10.3233/IDA-163209
| null |
cs.IR cs.CY cs.LG
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Recommender systems are software tools used to generate and provide
suggestions for items and other entities to the users by exploiting various
strategies. Hybrid recommender systems combine two or more recommendation
strategies in different ways to benefit from their complementary advantages.
This systematic literature review presents the state of the art in hybrid
recommender systems of the last decade. It is the first quantitative review
work completely focused in hybrid recommenders. We address the most relevant
problems considered and present the associated data mining and recommendation
techniques used to overcome them. We also explore the hybridization classes
each hybrid recommender belongs to, the application domains, the evaluation
process and proposed future research directions. Based on our findings, most of
the studies combine collaborative filtering with another technique often in a
weighted way. Also cold-start and data sparsity are the two traditional and top
problems being addressed in 23 and 22 studies each, while movies and movie
datasets are still widely used by most of the authors. As most of the studies
are evaluated by comparisons with similar methods using accuracy metrics,
providing more credible and user oriented evaluations remains a typical
challenge. Besides this, newer challenges were also identified such as
responding to the variation of user context, evolving user tastes or providing
cross-domain recommendations. Being a hot topic, hybrid recommenders represent
a good basis with which to respond accordingly by exploring newer opportunities
such as contextualizing recommendations, involving parallel hybrid algorithms,
processing larger datasets, etc.
|
[{'version': 'v1', 'created': 'Sat, 12 Jan 2019 18:12:44 GMT'}]
|
2019-01-15
|
[array(['Çano', 'Erion', ''], dtype=object)
array(['Morisio', 'Maurizio', ''], dtype=object)]
|
7,103 |
2103.14660
|
Dominik M\"uller
|
Dominik M\"uller, I\~naki Soto-Rey and Frank Kramer
|
Multi-Disease Detection in Retinal Imaging based on Ensembling
Heterogeneous Deep Learning Models
|
Code repository: https://github.com/frankkramer-lab/riadd.aucmedi
Appendix: https://doi.org/10.5281/zenodo.4573990
| null | null | null |
eess.IV cs.AI cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Preventable or undiagnosed visual impairment and blindness affect billion of
people worldwide. Automated multi-disease detection models offer great
potential to address this problem via clinical decision support in diagnosis.
In this work, we proposed an innovative multi-disease detection pipeline for
retinal imaging which utilizes ensemble learning to combine the predictive
capabilities of several heterogeneous deep convolutional neural network models.
Our pipeline includes state-of-the-art strategies like transfer learning, class
weighting, real-time image augmentation and Focal loss utilization.
Furthermore, we integrated ensemble learning techniques like heterogeneous deep
learning models, bagging via 5-fold cross-validation and stacked logistic
regression models. Through internal and external evaluation, we were able to
validate and demonstrate high accuracy and reliability of our pipeline, as well
as the comparability with other state-of-the-art pipelines for retinal disease
prediction.
|
[{'version': 'v1', 'created': 'Fri, 26 Mar 2021 18:02:17 GMT'}]
|
2021-03-30
|
[array(['Müller', 'Dominik', ''], dtype=object)
array(['Soto-Rey', 'Iñaki', ''], dtype=object)
array(['Kramer', 'Frank', ''], dtype=object)]
|
7,104 |
1307.5229
|
Patr\'icia Kitani
|
Raul Antonio Ferraz and Patricia Massae Kitani
|
Units of $\mathbb{Z}C_{p^n}$
| null | null | null | null |
math.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $p$ be a prime integer and $n,i$ be positive integers such that
\linebreak $S=\{-1, \ \theta, \ \mu_i=1+\theta+... + \theta^{i-1} \ \mid 1 < i
< \frac{p^n}{2}, \ gcd(p^n,i)=1 \}$ generates the group of units of
$\mathbb{Z}[\theta],$ where $\theta$ is a primitive ${p^n}$--$th$ root of
unity. Denote by $C_{p^n}$ the cyclic group of order $p^n.$ In this paper we
describe explicitly a multiplicatively independent set which generates a
complement to $\pm C_{p^n}$ in the group of units of the integral group ring of
$C_{p^n}.$
|
[{'version': 'v1', 'created': 'Fri, 19 Jul 2013 14:20:33 GMT'}
{'version': 'v2', 'created': 'Mon, 22 Jul 2013 13:05:39 GMT'}]
|
2013-07-23
|
[array(['Ferraz', 'Raul Antonio', ''], dtype=object)
array(['Kitani', 'Patricia Massae', ''], dtype=object)]
|
7,105 |
1805.02929
|
Alberto Verga
|
Alberto D. Verga
|
Interacting quantum walk on a graph
|
15 pages, 11 figures (v2 extended version)
|
Phys. Rev. E 99, 012127 (2019)
|
10.1103/PhysRevE.99.012127
| null |
quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
We introduce an elementary quantum system consisting of a set of spins on a
graph and a particle hopping between its nodes. The quantum state is build
sequentially, applying a unitary transformation that couples neighboring spins
and, at a node, the local spin with the particle. We observe the relaxation of
the system towards a stationary paramagnetic or ferromagnetic state, and
demonstrate that it is related to eigenvectors thermalization and random matrix
statistics. The relation between these macroscopic properties and interaction
generated entanglement is discussed.
|
[{'version': 'v1', 'created': 'Tue, 8 May 2018 10:06:31 GMT'}
{'version': 'v2', 'created': 'Mon, 24 Dec 2018 08:44:28 GMT'}]
|
2019-01-23
|
[array(['Verga', 'Alberto D.', ''], dtype=object)]
|
7,106 |
2203.05065
|
Han Lin Shang
|
Ufuk Beyaztas and Han Lin Shang
|
A Robust Functional Partial Least Squares for
Scalar-on-Multiple-Function Regression
|
31 pages, 6 figures, to appear at the Journal of Chemometrics
| null | null | null |
stat.ME stat.AP
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
The scalar-on-function regression model has become a popular analysis tool to
explore the relationship between a scalar response and multiple functional
predictors. Most of the existing approaches to estimate this model are based on
the least-squares estimator, which can be seriously affected by outliers in
empirical datasets. When outliers are present in the data, it is known that the
least-squares-based estimates may not be reliable. This paper proposes a robust
functional partial least squares method, allowing a robust estimate of the
regression coefficients in a scalar-on-multiple-function regression model. In
our method, the functional partial least squares components are computed via
the partial robust M-regression. The predictive performance of the proposed
method is evaluated using several Monte Carlo experiments and two chemometric
datasets: glucose concentration spectrometric data and sugar process data. The
results produced by the proposed method are compared favorably with some of the
classical functional or multivariate partial least squares and functional
principal component analysis methods.
|
[{'version': 'v1', 'created': 'Wed, 9 Mar 2022 22:01:05 GMT'}]
|
2022-03-11
|
[array(['Beyaztas', 'Ufuk', ''], dtype=object)
array(['Shang', 'Han Lin', ''], dtype=object)]
|
7,107 |
2101.11290
|
Jack Devlin
|
Jack A. Devlin, Matthias J. Borchert, Stefan Erlewein, Markus Fleck,
James A. Harrington, Barbara Latacz, Jan Warncke, Elise Wursten, Matthew A.
Bohman, Andreas H. Mooser, Christian Smorra, Markus Wiesinger, Christian
Will, Klaus Blaum, Yasuyuki Matsuda, Christian Ospelkaus, Wolfgang Quint,
Jochen Walz, Yasunori Yamazaki, Stefan Ulmer
|
Constraints on the Coupling between Axionlike Dark Matter and Photons
Using an Antiproton Superconducting Tuned Detection Circuit in a Cryogenic
Penning Trap
|
7 pages, 3 figures
|
Physical Review Letters 126, 041301 (2021)
|
10.1103/PhysRevLett.126.041301
| null |
astro-ph.CO hep-ph physics.atom-ph
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
We constrain the coupling between axionlike particles (ALPs) and photons,
measured with the superconducting resonant detection circuit of a cryogenic
Penning trap. By searching the noise spectrum of our fixed-frequency resonant
circuit for peaks caused by dark matter ALPs converting into photons in the
strong magnetic field of the Penning-trap magnet, we are able to constrain the
coupling of ALPs with masses around $2.7906-2.7914\,\textrm{neV/c}^2$ to
$g_{a\gamma}< 1 \times 10^{-11}\,\textrm{GeV}^{-1}$. This is more than one
order of magnitude lower than the best laboratory haloscope and approximately 5
times lower than the CERN axion solar telescope (CAST), setting limits in a
mass and coupling range which is not constrained by astrophysical observations.
Our approach can be extended to many other Penning-trap experiments and has the
potential to provide broad limits in the low ALP mass range.
|
[{'version': 'v1', 'created': 'Wed, 27 Jan 2021 09:56:09 GMT'}]
|
2021-01-28
|
[array(['Devlin', 'Jack A.', ''], dtype=object)
array(['Borchert', 'Matthias J.', ''], dtype=object)
array(['Erlewein', 'Stefan', ''], dtype=object)
array(['Fleck', 'Markus', ''], dtype=object)
array(['Harrington', 'James A.', ''], dtype=object)
array(['Latacz', 'Barbara', ''], dtype=object)
array(['Warncke', 'Jan', ''], dtype=object)
array(['Wursten', 'Elise', ''], dtype=object)
array(['Bohman', 'Matthew A.', ''], dtype=object)
array(['Mooser', 'Andreas H.', ''], dtype=object)
array(['Smorra', 'Christian', ''], dtype=object)
array(['Wiesinger', 'Markus', ''], dtype=object)
array(['Will', 'Christian', ''], dtype=object)
array(['Blaum', 'Klaus', ''], dtype=object)
array(['Matsuda', 'Yasuyuki', ''], dtype=object)
array(['Ospelkaus', 'Christian', ''], dtype=object)
array(['Quint', 'Wolfgang', ''], dtype=object)
array(['Walz', 'Jochen', ''], dtype=object)
array(['Yamazaki', 'Yasunori', ''], dtype=object)
array(['Ulmer', 'Stefan', ''], dtype=object)]
|
7,108 |
2001.07375
|
Andrea Navarro-Quezada
|
A. Navarro-Quezada and K. Gas and T. Truglas and V. Bauernfeind and M.
Matzer and D. Kreil and A. Ney and H. Groiss and M. Sawicki and A. Bonanni
|
Out-of-Plane Magnetic Anisotropy in Ordered Ensembles of Fe$_y$N
Nanocrystals Embedded in GaN
|
29 pages, 10 figures, submitted
|
https://www.mdpi.com/1996-1944/13/15/3294
|
10.3390/ma13153294
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Phase-separated semiconductors containing magnetic nanostructures are
relevant systems for the realization of high-density recording media. Here, the
controlled strain engineering of Ga$\delta$FeN layers with Fe$_y$N embedded
nanocrystals (NCs) \textit{via} Al$_x$Ga$_{1-x}$N buffers with different Al
concentration $0<x_\mathrm{Al}<41$\% is presented. Through the addition of Al
to the buffer, the formation of predominantly prolate-shaped
$\varepsilon$-Fe$_3$N NCs takes place. Already at an Al concentration
$x_\mathrm{Al}$\,$\approx$\,5\% the structural properties---phase, shape,
orientation---as well as the spatial distribution of the embedded NCs are
modified in comparison to those grown on a GaN buffer. Although the magnetic
easy axis of the cubic $\gamma$'-Ga$_y$Fe$_{4-y}$N nanocrystals in the layer on
the $x_\mathrm{Al} = 0\%$ buffer lies in-plane, the easy axis of the
$\varepsilon$-Fe$_3$N NCs in all samples with Al$_x$Ga$_{1-x}$N buffers
coincides with the $[0001]$ growth direction, leading to a sizeable
out-of-plane magnetic anisotropy and opening wide perspectives for
perpendicular recording based on nitride-based magnetic nanocrystals.
|
[{'version': 'v1', 'created': 'Tue, 21 Jan 2020 08:05:50 GMT'}
{'version': 'v2', 'created': 'Fri, 24 Jul 2020 11:01:35 GMT'}]
|
2020-07-27
|
[array(['Navarro-Quezada', 'A.', ''], dtype=object)
array(['Gas', 'K.', ''], dtype=object)
array(['Truglas', 'T.', ''], dtype=object)
array(['Bauernfeind', 'V.', ''], dtype=object)
array(['Matzer', 'M.', ''], dtype=object)
array(['Kreil', 'D.', ''], dtype=object)
array(['Ney', 'A.', ''], dtype=object)
array(['Groiss', 'H.', ''], dtype=object)
array(['Sawicki', 'M.', ''], dtype=object)
array(['Bonanni', 'A.', ''], dtype=object)]
|
7,109 |
1403.6840
|
Tiago Ricci
|
T.V. Ricci, J.E. Steiner, R.B. Menezes
|
Integral field unit spectroscopy of 10 early type galactic nuclei: I -
Principal component analysis Tomography and nuclear activity
|
26 pages, 17 figures, accepted for publication in MNRAS
| null |
10.1093/mnras/stu441
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Most massive galaxies show emission lines that can be characterized as
LINERs. To what extent this emission is related to AGNs or to stellar processes
is still an open question. In this paper, we analysed a sample of such galaxies
to study the central region in terms of nuclear and circumnuclear emission
lines, as well as the stellar component properties. For this reason, we
selected 10 massive ($\sigma$ > 200 km/s) nearby (d < 31 Mpc) galaxies and
observed them with the IFU/GMOS (integral field unit/Gemini Multi-Object
Spectrograph) spectrograph on the Gemini South Telescope. The data were
analysed with principal component analysis (PCA) Tomography to assess the main
properties of the objects. Two spectral regions were analysed: a yellow region
(5100-5800 A), adequate to show the properties of the stellar component, and a
red region (6250-6800 A), adequate to analyse the gaseous component. We found
that all objects previously known to present emission lines have a central
AGN-type emitting source. They also show gaseous and stellar kinematics typical
of discs. Such discs may be co-aligned (NGC 1380 and ESO 208 G-21), in
counter-rotation (IC 1459 and NGC 7097) or misaligned (IC 5181 and NGC 4546).
We also found one object with a gaseous disc but no stellar disc (NGC 2663),
one with a stellar disc but no gaseous disc (NGC 1404), one with neither
stellar nor gaseous disc (NGC 1399) and one with probably ionization cones (NGC
3136). PCA Tomography is an efficient method for detecting both the central AGN
and gaseous and stellar discs. In the two cases (NGC 1399 and NGC 1404) in
which no lines were previously reported, we found no evidence of either nuclear
or circumnuclear emission, using PCA Tomography only.
|
[{'version': 'v1', 'created': 'Wed, 26 Mar 2014 20:05:56 GMT'}]
|
2015-06-19
|
[array(['Ricci', 'T. V.', ''], dtype=object)
array(['Steiner', 'J. E.', ''], dtype=object)
array(['Menezes', 'R. B.', ''], dtype=object)]
|
7,110 |
2104.02997
|
Stefan Edelkamp
|
Stefan Edelkamp
|
On the Power of Refined Skat Selection
| null | null | null | null |
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Skat is a fascinating combinatorial card game, show-casing many of the
intrinsic challenges for modern AI systems such as cooperative and adversarial
behaviors (among the players), randomness (in the deal), and partial knowledge
(due to hidden cards). Given the larger number of tricks and higher degree of
uncertainty, reinforcement learning is less effective compared to classical
board games like Chess and Go. As within the game of Bridge, in Skat we have a
bidding and trick-taking stage. Prior to the trick-taking and as part of the
bidding process, one phase in the game is to select two skat cards, whose
quality may influence subsequent playing performance drastically. This paper
looks into different skat selection strategies. Besides predicting the
probability of winning and other hand strength functions we propose hard
expert-rules and a scoring functions based on refined skat evaluation features.
Experiments emphasize the impact of the refined skat putting algorithm on the
playing performance of the bots, especially for AI bidding and AI game
selection.
|
[{'version': 'v1', 'created': 'Wed, 7 Apr 2021 08:54:58 GMT'}]
|
2021-04-08
|
[array(['Edelkamp', 'Stefan', ''], dtype=object)]
|
7,111 |
1809.04475
|
Armando Bermudez Martinez
|
A. Bermudez Martinez
|
Jet properties and correlations in multi-jet topologies in CMS
| null | null | null | null |
hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present measurements of multi-jet event properties, performed using
proton-proton collisions data recorded by the CMS experiment. The jet charge
and jet mass distributions are considered in addition to a measurement of the
azimuthal angular correlations in 2- and 3-jet events. The measurements are
compared to predictions including higher orders matched to parton shower and
hadronization, together with predictions from semi-analytical calculations
beyond next-to-leading logarithmic accuracy.
|
[{'version': 'v1', 'created': 'Wed, 12 Sep 2018 14:19:12 GMT'}]
|
2018-09-13
|
[array(['Martinez', 'A. Bermudez', ''], dtype=object)]
|
7,112 |
1805.04300
|
K\'aroly N\'emeth
|
Karoly Nemeth
|
Simultaneous Oxygen and Boron Trifluoride Functionalization of Hexagonal
Boron Nitride: A Designer Cathode Material for Energy Storage
|
submitted for publication
| null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Covalent functionalization is a way to tune the electrochemical properties of
hexagonal boron nitride (h-BN) monolayers. The wide band gap insulator h-BN may
become metallic conductor upon functionalization with strong oxidants, such as
fluorosulfonyl radicals ($\cdot$OSO$_2$F), as known since 1978 [N. Bartlett et
al., J. Chem. Soc. Chem. Comm. {\bf 5}, 200 (1978)], with electrical
conductivity of 1.5 S/cm [C. Shen et al., J. Solid State Chem. {\bf 147}, 74
(1999)] that greatly surpasses commercial cathode material Li$_{x}$CoO$_{2}$
while retaining excellent ionic conductivity. Functionalized boron nitrides
(FBN-s) have great potential for cathode applications in energy storage
devices, for example in solid state batteries. While fluorosulfonyl
functionalization is unlikely to result in rechargeable cathodes, similarly to
graphene fluoride (CF$_x$), some other FBN-s discussed here may do. In the
present work, fluorene, oxygen and combined oxygen and boron trifluoride
functionalizations are studied, on the basis of band structure calculations.
Due to the open surfaces of FBN-s, fast ionic diffusion with Li, Na and Mg ions
is possible, enabling batteries with voltages of 2.1-5.6 V, theoretical energy
densities of 800-1200 Wh/kg and fast charge and discharge.
|
[{'version': 'v1', 'created': 'Fri, 11 May 2018 09:56:45 GMT'}
{'version': 'v2', 'created': 'Wed, 22 Aug 2018 04:07:28 GMT'}]
|
2018-08-23
|
[array(['Nemeth', 'Karoly', ''], dtype=object)]
|
7,113 |
2001.08648
|
Tanya Obikhod
|
Tetiana Obikhod, Ievgenii Petrenko
|
Computer modeling of production cross sections for beyond SM particles
|
10 pages, 9 figures
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the paper is presented computer modelling of BSM physics, such as Dark
matter candidates, di-jet resonances and new Higgs bosons with the help of MCFM
program.
|
[{'version': 'v1', 'created': 'Wed, 8 Jan 2020 14:49:02 GMT'}]
|
2020-01-24
|
[array(['Obikhod', 'Tetiana', ''], dtype=object)
array(['Petrenko', 'Ievgenii', ''], dtype=object)]
|
7,114 |
2203.13273
|
Guoqiang Zhang
|
Guoqiang Zhang and Kenta Niwa and W. Bastiaan Kleijn
|
A DNN Optimizer that Improves over AdaBelief by Suppression of the
Adaptive Stepsize Range
|
10 pages
| null | null | null |
cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We make contributions towards improving adaptive-optimizer performance. Our
improvements are based on suppression of the range of adaptive stepsizes in the
AdaBelief optimizer. Firstly, we show that the particular placement of the
parameter epsilon within the update expressions of AdaBelief reduces the range
of the adaptive stepsizes, making AdaBelief closer to SGD with momentum.
Secondly, we extend AdaBelief by further suppressing the range of the adaptive
stepsizes. To achieve the above goal, we perform mutual layerwise vector
projections between the gradient g_t and its first momentum m_t before using
them to estimate the second momentum. The new optimization method is referred
to as Aida. Thirdly, extensive experimental results show that Aida outperforms
nine optimizers when training transformers and LSTMs for NLP, and VGG and
ResNet for image classification over CIAF10 and CIFAR100 while matching the
best performance of the nine methods when training WGAN-GP models for image
generation tasks. Furthermore, Aida produces higher validation accuracies than
AdaBelief for training ResNet18 over ImageNet. Code is available <a
href="https://github.com/guoqiang-x-zhang/AidaOptimizer">at this URL</a>
|
[{'version': 'v1', 'created': 'Thu, 24 Mar 2022 18:00:32 GMT'}
{'version': 'v2', 'created': 'Wed, 6 Apr 2022 03:50:19 GMT'}
{'version': 'v3', 'created': 'Thu, 28 Apr 2022 10:54:34 GMT'}
{'version': 'v4', 'created': 'Fri, 29 Apr 2022 09:08:01 GMT'}
{'version': 'v5', 'created': 'Tue, 24 Jan 2023 09:36:08 GMT'}]
|
2023-01-25
|
[array(['Zhang', 'Guoqiang', ''], dtype=object)
array(['Niwa', 'Kenta', ''], dtype=object)
array(['Kleijn', 'W. Bastiaan', ''], dtype=object)]
|
7,115 |
2103.13352
|
Varese Salvador Timoteo
|
E. F. Batista, S. Szpigel. and V. S. Timoteo
|
Pions and Contacts at N4LO: Some details on the chiral nuclear force
|
17 pages, 14 figures
|
Annals of Physics 425 (2021) 168383
|
10.1016/j.aop.2020.168383
| null |
nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work we have performed a detailed study of chiral nuclear forces at
N4LO approximation applied to selected channels of the neutron-proton ($n p$)
scattering. The idea is to analyse the different contributions to the
nucleon-nucleon ($NN$) potential by separating the part coming from the
exchange of pions and the one coming from the contact interactions. We consider
two state-of-the-art chiral interactions at N4LO which are constructed using
different regularization procedures: the non-local Idaho-Salamanca force and
the semi-local interaction from the Bochum group. In order to compare the two
types of regularization we consider both interactions with a 500 MeV cutoff and
to analyse the cutoff dependence we select the Bochum potential with three
different cutoff values: 500, 450 and 400 MeV. Our results show that the
balance between pion exchanges and contact interactions depends strongly on the
regularization procedure. The non-local angle-independent regularization of
both components of the interaction implemented in the Idaho-Salamanca potential
make the contact terms to be present at large distances while the local
regularization of the pion exchanges in the Bochum potential restricts the
contact interactions to small distances. Also, the value of the cutoff affects
the strength of the potential but the interplay between pion exchanges and
contact terms remains qualitatively the same.
|
[{'version': 'v1', 'created': 'Wed, 24 Mar 2021 17:18:19 GMT'}]
|
2021-03-25
|
[array(['Batista', 'E. F.', ''], dtype=object)
array(['Szpigel.', 'S.', ''], dtype=object)
array(['Timoteo', 'V. S.', ''], dtype=object)]
|
7,116 |
1506.03263
|
Jurgen Fuchs
|
Jens Fjelstad, J\"urgen Fuchs
|
Mapping class group representations from Drinfeld doubles of finite
groups
|
68 pages, several figures. v2: 60 pages; removed a few examples and
rearranged the presentation of the remaining examples
| null | null | null |
math.QA hep-th math-ph math.GT math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate representations of mapping class groups of surfaces that arise
from the untwisted Drinfeld double of a finite group G, focusing on surfaces
without marked points or with one marked point. We obtain concrete descriptions
of such representations in terms of finite group data. This allows us to
establish various properties of these representations. In particular we show
that they have finite images, and that for surfaces of genus at least 3 their
restriction to the Torelli group is non-trivial iff G is non-abelian.
|
[{'version': 'v1', 'created': 'Wed, 10 Jun 2015 11:39:15 GMT'}
{'version': 'v2', 'created': 'Mon, 11 May 2020 11:52:14 GMT'}]
|
2020-05-12
|
[array(['Fjelstad', 'Jens', ''], dtype=object)
array(['Fuchs', 'Jürgen', ''], dtype=object)]
|
7,117 |
cond-mat/0210206
|
Fabrice Gerbier
|
F. Gerbier, S. Richard, J. H. Thywissen, M. Hugbart, P. Bouyer, A.
Aspect
|
Phase coherence length of a Bose-Einstein condensate
|
to be published in the proceedings of "Cool Interactions 2002",
Heidelberg, 9-13 september 2002 (Wiley)
|
Interactions in ultracold gases, M. Weidemuller and C. Zimmermann
Eds. (Wiley-VCH, 2003).
| null | null |
cond-mat
| null |
We report on the measurement of the momentum distribution of an elongated
Bose-Einstein condensate. A broadening of the distribution with increasing
temperature is observed, which is clear evidence for phase fluctuations in the
sample.
|
[{'version': 'v1', 'created': 'Wed, 9 Oct 2002 16:55:01 GMT'}]
|
2007-05-23
|
[array(['Gerbier', 'F.', ''], dtype=object)
array(['Richard', 'S.', ''], dtype=object)
array(['Thywissen', 'J. H.', ''], dtype=object)
array(['Hugbart', 'M.', ''], dtype=object)
array(['Bouyer', 'P.', ''], dtype=object)
array(['Aspect', 'A.', ''], dtype=object)]
|
7,118 |
2006.12227
|
Matej Mihel\v{c}i\'c
|
Matej Mihel\v{c}i\'c and Tomislav \v{S}muc
|
Approaches For Multi-View Redescription Mining
|
This work has been submitted to the IEEE for possible publication.
Copyright may be transferred without notice, after which this version may no
longer be accessible
|
IEEE Access, vol. 9, pp. 19356-19378, 2021
|
10.1109/ACCESS.2021.3054245
| null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The task of redescription mining explores ways to re-describe different
subsets of entities contained in a dataset and to reveal non-trivial
associations between different subsets of attributes, called views. This
interesting and challenging task is encountered in different scientific fields,
and is addressed by a number of approaches that obtain redescriptions and allow
for the exploration and analyses of attribute associations. The main limitation
of existing approaches to this task is their inability to use more than two
views. Our work alleviates this drawback. We present a memory efficient,
extensible multi-view redescription mining framework that can be used to relate
multiple, i.e. more than two views, disjoint sets of attributes describing one
set of entities. The framework can use any multi-target regression or
multi-label classification algorithm, with models that can be represented as
sets of rules, to generate redescriptions. Multi-view redescriptions are built
using incremental view-extending heuristic from initially created two-view
redescriptions. In this work, we use different types of Predictive Clustering
trees algorithms (regular, extra, with random output selection) and the Random
Forest thereof in order to improve the quality of final redescription sets
and/or execution time needed to generate them. We provide multiple performance
analyses of the proposed framework and compare it against the naive approach to
multi-view redescription mining. We demonstrate the usefulness of the proposed
multi-view extension on several datasets, including a use-case on understanding
of machine learning models - a topic of growing importance in machine learning
and artificial intelligence in general.
|
[{'version': 'v1', 'created': 'Mon, 22 Jun 2020 13:24:29 GMT'}
{'version': 'v2', 'created': 'Tue, 17 Nov 2020 14:02:14 GMT'}]
|
2021-03-23
|
[array(['Mihelčić', 'Matej', ''], dtype=object)
array(['Šmuc', 'Tomislav', ''], dtype=object)]
|
7,119 |
hep-th/9910048
|
Jussi Kalkkinen
|
Jussi Kalkkinen
|
Non-Abelian Gerbes from Strings on a Branched Space-Time
|
25 pages, LaTeX
| null | null |
SISSA 125/99/EP
|
hep-th
| null |
As superstring solitons that carry Neuveu-Schwarz charge can be described in
terms of gerbes, one expects non-Abelian gerbes to appear e.g. in the exotic
six-dimensional world-volume theories of coinciding NS5 branes. We consider
open bosonic strings on a space-time that is branched in such a way that the
B-field is provided with the same Lie algebra structure as the world-volume
gauge field on a D-brane. These considerations motivate a generalization of the
cocycle conditions and the transformation rules of an Abelian gerbe in
hypercohomology. The resulting system incorporates in a natural way the NS
two-form, the RR gauge field, the Chan-Paton gauge field, the relevant gauge
transformations and the holonomies associated to Wilson surface observables.
|
[{'version': 'v1', 'created': 'Wed, 6 Oct 1999 16:06:32 GMT'}]
|
2007-05-23
|
[array(['Kalkkinen', 'Jussi', ''], dtype=object)]
|
7,120 |
math/0301302
|
Kosta Dosen
|
K. Dosen (Mathematical Institute, Belgrade)
|
Simplicial Endomorphisms
|
33 pages, new version, updated references
| null | null |
MI-2003x
|
math.GT
| null |
The monoids of simplicial endomorphisms, i.e. the monoids of endomorphisms in
the simplicial category, are submonoids of monoids one finds in Temperley-Lieb
algebras, and as the monoids of Temperley-Lieb algebras are linked to
situations where an endofunctor is adjoint to itself, so the monoids of
simplicial endomorphisms are linked to arbitrary adjoint situations. This link
is established through diagrams of the kind found in Temperley-Lieb algebras.
Results about these matters, which were previously prefigured up to a point,
are here surveyed and reworked. A presentation of monoids of simplicial
endomorphisms by generators and relations has been given a long time ago. Here
a closely related presentation is given, with completeness proved in a new and
self-contained manner.
|
[{'version': 'v1', 'created': 'Sat, 25 Jan 2003 22:04:08 GMT'}
{'version': 'v2', 'created': 'Tue, 28 Jan 2003 12:23:30 GMT'}
{'version': 'v3', 'created': 'Thu, 6 Feb 2003 12:14:37 GMT'}
{'version': 'v4', 'created': 'Tue, 11 Mar 2003 13:00:10 GMT'}
{'version': 'v5', 'created': 'Tue, 23 Dec 2003 10:54:55 GMT'}
{'version': 'v6', 'created': 'Fri, 13 Apr 2007 17:31:28 GMT'}
{'version': 'v7', 'created': 'Sat, 14 Apr 2007 09:32:31 GMT'}
{'version': 'v8', 'created': 'Tue, 17 Apr 2007 11:59:23 GMT'}
{'version': 'v9', 'created': 'Mon, 17 Sep 2007 12:03:08 GMT'}]
|
2007-09-17
|
[array(['Dosen', 'K.', '', 'Mathematical Institute, Belgrade'],
dtype=object) ]
|
7,121 |
2204.02054
|
Jin Li Dr.
|
Yanyan Liu, Changcheng Pan, Minglin Bie, and Jin Li
|
An efficient real-time target tracking algorithm using adaptive feature
fusion
| null |
Journal of Visual Communication and Image Representation, 103505
(2022)
|
10.1016/j.jvcir.2022.103505
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Visual-based target tracking is easily influenced by multiple factors, such
as background clutter, targets fast-moving, illumination variation, object
shape change, occlusion, etc. These factors influence the tracking accuracy of
a target tracking task. To address this issue, an efficient real-time target
tracking method based on a low-dimension adaptive feature fusion is proposed to
allow us the simultaneous implementation of the high-accuracy and real-time
target tracking. First, the adaptive fusion of a histogram of oriented gradient
(HOG) feature and color feature is utilized to improve the tracking accuracy.
Second, a convolution dimension reduction method applies to the fusion between
the HOG feature and color feature to reduce the over-fitting caused by their
high-dimension fusions. Third, an average correlation energy estimation method
is used to extract the relative confidence adaptive coefficients to ensure
tracking accuracy. We experimentally confirm the proposed method on an OTB100
data set. Compared with nine popular target tracking algorithms, the proposed
algorithm gains the highest tracking accuracy and success tracking rate.
Compared with the traditional Sum of Template and Pixel-wise LEarners (STAPLE)
algorithm, the proposed algorithm can obtain a higher success rate and
accuracy, improving by 0.023 and 0.019, respectively. The experimental results
also demonstrate that the proposed algorithm can reach the real-time target
tracking with 50 fps. The proposed method paves a more promising way for
real-time target tracking tasks under a complex environment, such as appearance
deformation, illumination change, motion blur, background, similarity, scale
change, and occlusion.
|
[{'version': 'v1', 'created': 'Tue, 5 Apr 2022 08:40:52 GMT'}]
|
2022-04-06
|
[array(['Liu', 'Yanyan', ''], dtype=object)
array(['Pan', 'Changcheng', ''], dtype=object)
array(['Bie', 'Minglin', ''], dtype=object)
array(['Li', 'Jin', ''], dtype=object)]
|
7,122 |
1204.3516
|
Yu-An Sun
|
Yu-An Sun and Christopher Dance
|
When majority voting fails: Comparing quality assurance methods for
noisy human computation environment
|
Presented at Collective Intelligence conference, 2012
(arXiv:1204.2991)
| null | null |
CollectiveIntelligence/2012/56
|
cs.SI cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Quality assurance remains a key topic in human computation research. Prior
work indicates that majority voting is effective for low difficulty tasks, but
has limitations for harder tasks. This paper explores two methods of addressing
this problem: tournament selection and elimination selection, which exploit 2-,
3- and 4-way comparisons between different answers to human computation tasks.
Our experimental results and statistical analyses show that both methods
produce the correct answer in noisy human computation environment more often
than majority voting. Furthermore, we find that the use of 4-way comparisons
can significantly reduce the cost of quality assurance relative to the use of
2-way comparisons.
|
[{'version': 'v1', 'created': 'Mon, 16 Apr 2012 15:12:22 GMT'}]
|
2012-04-17
|
[array(['Sun', 'Yu-An', ''], dtype=object)
array(['Dance', 'Christopher', ''], dtype=object)]
|
7,123 |
nucl-ex/9910005
|
Mark K. Jones
|
The Jefferson Lab Hall A Collaboration: M. K. Jones, et al
|
The ratio of proton's electric to magnetic form factors measured by
polarization transfer
|
5 pages, 2 figures, version of paper after corrections due to
referees comments and shortened by removing one figure for Physical Review
Letters
|
Phys.Rev.Lett.84:1398-1402,2000
|
10.1103/PhysRevLett.84.1398
| null |
nucl-ex
| null |
The ratio of the proton's elastic electromagnetic form factors was obtained
by measuring the transverse and longitudinal polarizations of recoiling protons
from the elastic scattering of polarized electrons with unpolarized protons.
The ratio of the electric to magnetic form factor is proportional to the ratio
of the transverse to longitudinal recoil polarizations. The ratio was measured
over a range of four-momentum transfer squared between 0.5 and 3.5 GeV-squared.
Simultaneous measurement of transverse and longitudinal polarizations in a
polarimeter provides good control of the systematic uncertainty. The results
for the ratio of the proton's electric to magnetic form factors show a
systematic decrease with increasing four momentum squared, indicating for the
first time a marked difference in the spatial distribution of charge and
magnetization currents in the proton.
|
[{'version': 'v1', 'created': 'Thu, 7 Oct 1999 20:10:26 GMT'}
{'version': 'v2', 'created': 'Thu, 2 Dec 1999 23:39:19 GMT'}]
|
2008-11-26
|
[array(['The Jefferson Lab Hall A Collaboration', '', ''], dtype=object)
array(['Jones', 'M. K.', ''], dtype=object)]
|
7,124 |
1908.00899
|
Frank Sottile
|
Jonathan D. Hauenstein, Anton Leykin, Jose Israel Rodriguez, and Frank
Sottile
|
A numerical toolkit for multiprojective varieties
|
28 pages
| null | null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A numerical description of an algebraic subvariety of projective space is
given by a general linear section, called a witness set. For a subvariety of a
product of projective spaces (a multiprojective variety), the corresponding
numerical description is given by a witness collection, whose structure is more
involved. We build on recent work to develop a toolkit for the numerical
manipulation of multiprojective varieties that operates on witness collections,
and use this toolkit in an algorithm for numerical irreducible decomposition of
multiprojective varieties. The toolkit and decomposition algorithm are
illustrated throughout in a series of examples.
|
[{'version': 'v1', 'created': 'Fri, 2 Aug 2019 15:03:22 GMT'}
{'version': 'v2', 'created': 'Wed, 29 Apr 2020 16:09:50 GMT'}]
|
2020-04-30
|
[array(['Hauenstein', 'Jonathan D.', ''], dtype=object)
array(['Leykin', 'Anton', ''], dtype=object)
array(['Rodriguez', 'Jose Israel', ''], dtype=object)
array(['Sottile', 'Frank', ''], dtype=object)]
|
7,125 |
1710.05345
|
Sourendu Gupta
|
Sourendu Gupta and Rishi Sharma
|
An effective field theory for warm QCD
|
14 pages, 6 figures
|
Phys. Rev. D 97, 036025 (2018)
|
10.1103/PhysRevD.97.036025
| null |
hep-ph hep-lat nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using only global symmetries of QCD, we set up an effective model of quarks
at finite temperature near the cross over, including all possible terms up to
dimension 6. We first treat this in mean field theory. Then we investigate
low-energy fluctuations around it up to one-loop order in fermions below the
cross over. Static correlation functions of pions and the cross over
temperature, both measured on the lattice, completely suffice to fix all
parameters of the theory. We examine predictions of this theory, including
those for thermodynamic quantities. The results are encouraging.
|
[{'version': 'v1', 'created': 'Sun, 15 Oct 2017 15:25:28 GMT'}]
|
2018-03-07
|
[array(['Gupta', 'Sourendu', ''], dtype=object)
array(['Sharma', 'Rishi', ''], dtype=object)]
|
7,126 |
1201.2073
|
Rafi Muhammad
|
Mehwish Aziz, Muhammad Rafi
|
Pbm: A new dataset for blog mining
|
6; Internet and Web Engineering from: International Conference on
Computer Engineering and Technology, 3rd (ICCET 2011)
| null | null | null |
cs.AI cs.CL cs.IR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Text mining is becoming vital as Web 2.0 offers collaborative content
creation and sharing. Now Researchers have growing interest in text mining
methods for discovering knowledge. Text mining researchers come from variety of
areas like: Natural Language Processing, Computational Linguistic, Machine
Learning, and Statistics. A typical text mining application involves
preprocessing of text, stemming and lemmatization, tagging and annotation,
deriving knowledge patterns, evaluating and interpreting the results. There are
numerous approaches for performing text mining tasks, like: clustering,
categorization, sentimental analysis, and summarization. There is a growing
need to standardize the evaluation of these tasks. One major component of
establishing standardization is to provide standard datasets for these tasks.
Although there are various standard datasets available for traditional text
mining tasks, but there are very few and expensive datasets for blog-mining
task. Blogs, a new genre in web 2.0 is a digital diary of web user, which has
chronological entries and contains a lot of useful knowledge, thus offers a lot
of challenges and opportunities for text mining. In this paper, we report a new
indigenous dataset for Pakistani Political Blogosphere. The paper describes the
process of data collection, organization, and standardization. We have used
this dataset for carrying out various text mining tasks for blogosphere, like:
blog-search, political sentiments analysis and tracking, identification of
influential blogger, and clustering of the blog-posts. We wish to offer this
dataset free for others who aspire to pursue further in this domain.
|
[{'version': 'v1', 'created': 'Tue, 10 Jan 2012 15:18:38 GMT'}]
|
2012-01-11
|
[array(['Aziz', 'Mehwish', ''], dtype=object)
array(['Rafi', 'Muhammad', ''], dtype=object)]
|
7,127 |
cond-mat/9907483
|
Christoph Bruder
|
S. Pilgram, W. Belzig, and C. Bruder
|
Spectral Features of the Proximity Effect
|
LT22 proceedings
| null |
10.1016/S0921-4526(99)01827-X
| null |
cond-mat.supr-con cond-mat.mes-hall
| null |
We calculate the local density of states (LDOS) of a superconductor-normal
metal sandwich at arbitrary impurity concentration. The presence of the
superconductor induces a gap in the normal metal spectrum that is proportional
to the inverse of the elastic mean free path $l$ for rather clean systems. For
a mean free path much shorter than the thickness of the normal metal, we find a
gap size proportional to $l$ that approaches the behavior predicted by the
Usadel equation (diffusive limit).
|
[{'version': 'v1', 'created': 'Fri, 30 Jul 1999 09:39:42 GMT'}]
|
2009-10-31
|
[array(['Pilgram', 'S.', ''], dtype=object)
array(['Belzig', 'W.', ''], dtype=object)
array(['Bruder', 'C.', ''], dtype=object)]
|
7,128 |
1712.09823
|
Tsukasa Tada
|
Tsukasa Tada
|
Conformal Quantum Mechanics and Sine-Square Deformation
| null |
Prog Theor Exp Phys (2018)
|
10.1093/ptep/pty058
|
RIKEN-TH-211, RIKEN-QHP-346, RIKEN-iTHEMS-Report-17
|
hep-th cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We revisit conformal quantum mechanics (CQM) from the perspective of
sine-square deformation (SSD) and the entanglement Hamiltonian. The operators
that correspond to SSD and the entanglement Hamiltonian are identified. Thus,
the nature of SSD and entanglement can be discussed in a much simpler CQM
setting than higher-dimensional field theories.
|
[{'version': 'v1', 'created': 'Thu, 28 Dec 2017 11:01:51 GMT'}
{'version': 'v2', 'created': 'Sun, 31 Dec 2017 06:25:55 GMT'}
{'version': 'v3', 'created': 'Wed, 25 Apr 2018 08:20:39 GMT'}]
|
2019-12-06
|
[array(['Tada', 'Tsukasa', ''], dtype=object)]
|
7,129 |
2306.02125
|
Jo Nelson
|
Jo Nelson, Morgan Weiler
|
Torus knot filtered embedded contact homology of the tight contact
3-sphere
|
85 pages, arXiv insists the primary is GT rather than SG
| null | null | null |
math.GT math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Knot filtered embedded contact homology was first introduced by Hutchings in
2015; it has been computed for the standard transverse unknot in irrational
ellipsoids by Hutchings and for the Hopf link in lens spaces L(n,n-1) via a
quotient by Weiler. While straightforward toric constructions can be used to
understand the ECH chain complexes of open books along the unknot and Hopf
link, they do not readily adapt to general torus knots and links. In this
paper, we generalize the definition and invariance of knot filtered embedded
contact homology to allow for degenerate knots with rational rotation numbers.
We then develop new methods for understanding the embedded contact homology
chain complex of positive torus knotted fibrations of the standard tight
contact 3-sphere in terms of their presentation as open books and as Seifert
fibered spaces. We provide Morse-Bott methods, using a doubly filtered complex
and the energy filtered perturbed Seiberg-Witten theory developed by Hutchings
and Taubes, and use them to compute the T(2,q) knot filtered embedded contact
homology, for q odd and positive. In the sequel we complete the computation for
positive T(p,q) knots (where there is a nonvanishing differential) and use our
results to deduce quantitative existence results for torus knotted Reeb
dynamics on the tight 3-sphere and the mean action of area preserving
diffeomorphisms of once punctured surfaces of arbitrary genus arising as
Seifert surfaces of positive torus knots.
|
[{'version': 'v1', 'created': 'Sat, 3 Jun 2023 14:42:10 GMT'}]
|
2023-06-06
|
[array(['Nelson', 'Jo', ''], dtype=object)
array(['Weiler', 'Morgan', ''], dtype=object)]
|
7,130 |
0901.1572
|
Sophie Querouil
|
Sophie Qu\'erouil (IMAR-DOP, CAVIAR), M. A. Silva (IMAR-DOP), I.
Cascao (IMAR-DOP), S. Magalhaes (IMAR-DOP), M. I. Seabra (IMAR-DOP), M. A.
Machete (IMAR-DOP), R. S. Santos (IMAR-DOP)
|
Why do dolphins form mixed-species associations in the Azores ?
| null |
Ethology 114, 12 (2008) 1183-1194
|
10.1111/j.1439-0310.2008.01570.x
| null |
q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Mixed-species associations are temporary associations between individuals of
different species that are often observed in birds, primates and cetaceans.
They have been interpreted as a strategy to reduce predation risk, enhance
foraging success and/or provide a social advantage. In the archipelago of the
Azores, four species of dolphins are commonly involved in mixed-species
associations: the common dolphin, Delphinus delphis, the bottlenose dolphin,
Tursiops truncatus, the striped dolphin, Stenella coeruleoalba, and the spotted
dolphin, Stenella frontalis. In order to understand the reasons why dolphins
associate, we analysed field data collected since 1999 by research scientists
and trained observers placed onboard fishing vessels. In total, 113
mixed-species groups were observed out of 5720 sightings. The temporal
distribution, habitat (water depth, distance to the coast), behaviour (i.e.
feeding, travelling, socializing), size and composition of mixed-species groups
were compared with those of single-species groups. Results did not support the
predation avoidance hypothesis and gave little support to the social advantage
hypothesis. The foraging advantage hypothesis was the most convincing. However,
the benefits of mixed-species associations appeared to depend on the species.
Associations were likely to be opportunistic in the larger bottlenose dolphin,
while there seemed to be some evolutionary constraints favouring associations
in the rarer striped dolphin. Comparison with previous studies suggests that
the formation of mixed-species groups depends on several environmental factors,
and therefore may constitute an adaptive response.
|
[{'version': 'v1', 'created': 'Mon, 12 Jan 2009 13:33:03 GMT'}
{'version': 'v2', 'created': 'Wed, 21 Jul 2010 14:24:55 GMT'}]
|
2010-07-26
|
[array(['Quérouil', 'Sophie', '', 'IMAR-DOP, CAVIAR'], dtype=object)
array(['Silva', 'M. A.', '', 'IMAR-DOP'], dtype=object)
array(['Cascao', 'I.', '', 'IMAR-DOP'], dtype=object)
array(['Magalhaes', 'S.', '', 'IMAR-DOP'], dtype=object)
array(['Seabra', 'M. I.', '', 'IMAR-DOP'], dtype=object)
array(['Machete', 'M. A.', '', 'IMAR-DOP'], dtype=object)
array(['Santos', 'R. S.', '', 'IMAR-DOP'], dtype=object)]
|
7,131 |
2106.14912
|
Ruben Minasian
|
Peng Cheng, Ruben Minasian, Stefan Theisen
|
Anomalies as Obstructions: from Dimensional Lifts to Swampland
|
47 pages
| null |
10.1007/JHEP01(2022)068
|
IPhT-t21/036
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We revisit the relation between the anomalies in four and six dimensions and
the Chern-Simons couplings one dimension below. While the dimensional reduction
of chiral theories is well-understood, the question which three and
five-dimensional theories can come from a general circle reduction, and are
hence liftable, is more subtle. We argue that existence of an anomaly
cancellation mechanism is a necessary condition for liftability. In addition,
the anomaly cancellation and the CS couplings in six and five dimensions
respectively determine the central charges of string-like BPS objects that
cannot be consistently decoupled from gravity, a.k.a. supergravity strings.
Following the completeness conjecture and requiring that their worldsheet
theory is unitary imposes bounds on the admissible theories. We argue that for
the anomaly-free six-dimensional theories it is more advantageous to study the
unitarity constraints obtained after reduction to five dimensions. In general
these are slightly more stringent and can be cast in a more geometric form,
highly reminiscent of the Kodaira positivity condition (KPC). Indeed, for the
F-theoretic models which have an underlying Calabi-Yau threefold these can be
directly compared. The unitarity constraints (UC) are in general weaker than
KPC, and maybe useful in understanding the consistent models without
F-theoretic realisation. We catalogue the cases when UC is more restrictive
than KPC, hinting at more refined hidden structure in elliptic Calabi-Yau
threefolds with certain singularity structure.
|
[{'version': 'v1', 'created': 'Mon, 28 Jun 2021 18:00:47 GMT'}]
|
2022-02-02
|
[array(['Cheng', 'Peng', ''], dtype=object)
array(['Minasian', 'Ruben', ''], dtype=object)
array(['Theisen', 'Stefan', ''], dtype=object)]
|
7,132 |
1104.0662
|
Dylan Rupel
|
Dylan Rupel
|
Positivity in Quantum Cluster Algebras and Flags of Valued Quiver
Representations
|
This paper has been withdrawn because the author's claim of
positivity may be false and needs to be investigated further
| null | null | null |
math.QA math.CO math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we give a direct proof of the positivity conjecture for adapted
quantum cluster variables. Moreover, our process allows one to explicitly
compute formulas for all adapted cluster monomials and certain ordered products
of adapted cluster monomials. In particular, we describe all cluster monomials
in cluster algebras and quantum cluster algebras of rank 2. One may obtain
similar formulas for all finite type cluster monomials.
The above results are achieved by computing explicit set-theoretic
decompositions of Grassmannians of subrepresentations in adapted valued quiver
representations into a disjoint union of products of standard vector space
Grassmannians. We actually prove a more general result which should be of
independent interest: we compute these decompositions for arbitrary flags of
subrepresentations in adapted valued quiver representations.
This implies the existence of counting polynomials for the number of points
in these sets over different finite fields. Using this we extend the results of
\cite{rupel} to quantum cluster algebras $\Acal_q(Q,\bfd)$, where $q$ is an
indeterminate.
|
[{'version': 'v1', 'created': 'Mon, 4 Apr 2011 19:46:29 GMT'}
{'version': 'v2', 'created': 'Tue, 5 Apr 2011 06:47:50 GMT'}]
|
2011-04-06
|
[array(['Rupel', 'Dylan', ''], dtype=object)]
|
7,133 |
1904.10720
|
Paul Rochet
|
Thibault Espinasse (ICJ), Paul Rochet (LMJL)
|
A coupling of the spectral measures at a vertex
| null | null | null | null |
math.CO math.PR math.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Given the adjacency matrix of an undirected graph, we define a coupling of
the spectral measures at the vertices, whose moments count the rooted closed
paths in the graph. The resulting joint spectral measure verifies numerous
interesting properties that allow to recover minors of analytical functions of
the adjacency matrix from its generalized moments. We prove an extension of
Obata's Central Limit Theorem in growing star-graphs to the multivariate case
and discuss some combinatorial properties using Viennot's heaps of pieces point
of view.
|
[{'version': 'v1', 'created': 'Wed, 24 Apr 2019 09:50:40 GMT'}]
|
2019-04-25
|
[array(['Espinasse', 'Thibault', '', 'ICJ'], dtype=object)
array(['Rochet', 'Paul', '', 'LMJL'], dtype=object)]
|
7,134 |
1807.06349
|
Jurek Leonhardt
|
Jurek Leonhardt, Avishek Anand, Megha Khosla
|
User Fairness in Recommender Systems
| null | null |
10.1145/3184558.3186949
| null |
cs.CY cs.IR
|
http://creativecommons.org/licenses/by/4.0/
|
Recent works in recommendation systems have focused on diversity in
recommendations as an important aspect of recommendation quality. In this work
we argue that the post-processing algorithms aimed at only improving diversity
among recommendations lead to discrimination among the users. We introduce the
notion of user fairness which has been overlooked in literature so far and
propose measures to quantify it. Our experiments on two diversification
algorithms show that an increase in aggregate diversity results in increased
disparity among the users.
|
[{'version': 'v1', 'created': 'Tue, 17 Jul 2018 11:19:42 GMT'}]
|
2018-07-18
|
[array(['Leonhardt', 'Jurek', ''], dtype=object)
array(['Anand', 'Avishek', ''], dtype=object)
array(['Khosla', 'Megha', ''], dtype=object)]
|
7,135 |
2206.04216
|
Seongjun Yun
|
Seongjun Yun, Seoyoon Kim, Junhyun Lee, Jaewoo Kang, Hyunwoo J. Kim
|
Neo-GNNs: Neighborhood Overlap-aware Graph Neural Networks for Link
Prediction
| null |
NeurIPS 2021
| null | null |
cs.LG cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
Graph Neural Networks (GNNs) have been widely applied to various fields for
learning over graph-structured data. They have shown significant improvements
over traditional heuristic methods in various tasks such as node classification
and graph classification. However, since GNNs heavily rely on smoothed node
features rather than graph structure, they often show poor performance than
simple heuristic methods in link prediction where the structural information,
e.g., overlapped neighborhoods, degrees, and shortest paths, is crucial. To
address this limitation, we propose Neighborhood Overlap-aware Graph Neural
Networks (Neo-GNNs) that learn useful structural features from an adjacency
matrix and estimate overlapped neighborhoods for link prediction. Our Neo-GNNs
generalize neighborhood overlap-based heuristic methods and handle overlapped
multi-hop neighborhoods. Our extensive experiments on Open Graph Benchmark
datasets (OGB) demonstrate that Neo-GNNs consistently achieve state-of-the-art
performance in link prediction. Our code is publicly available at
https://github.com/seongjunyun/Neo_GNNs.
|
[{'version': 'v1', 'created': 'Thu, 9 Jun 2022 01:43:49 GMT'}]
|
2022-06-10
|
[array(['Yun', 'Seongjun', ''], dtype=object)
array(['Kim', 'Seoyoon', ''], dtype=object)
array(['Lee', 'Junhyun', ''], dtype=object)
array(['Kang', 'Jaewoo', ''], dtype=object)
array(['Kim', 'Hyunwoo J.', ''], dtype=object)]
|
7,136 |
1512.02100
|
Tim Taylor
|
Tim Taylor, Alan Dorin, Kevin Korb
|
Digital Genesis: Computers, Evolution and Artificial Life
|
Extended abstract of talk presented at the 7th Munich-Sydney-Tilburg
Philosophy of Science Conference: Evolutionary Thinking, University of
Sydney, 20-22 March 2014. Presentation slides from talk available at
http://www.tim-taylor.com/papers/digital-genesis-presentation.pdf
| null | null | null |
cs.NE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The application of evolution in the digital realm, with the goal of creating
artificial intelligence and artificial life, has a history as long as that of
the digital computer itself. We illustrate the intertwined history of these
ideas, starting with the early theoretical work of John von Neumann and the
pioneering experimental work of Nils Aall Barricelli. We argue that
evolutionary thinking and artificial life will continue to play an integral
role in the future development of the digital world.
|
[{'version': 'v1', 'created': 'Mon, 7 Dec 2015 15:53:48 GMT'}]
|
2015-12-08
|
[array(['Taylor', 'Tim', ''], dtype=object)
array(['Dorin', 'Alan', ''], dtype=object)
array(['Korb', 'Kevin', ''], dtype=object)]
|
7,137 |
hep-th/0005150
|
Alexander G. Abanov
|
Alexander G. Abanov
|
Hopf term induced by fermions
|
5 pages, no figures, latex, elsart.cls, minor errors are corrected
|
Phys.Lett. B492 (2000) 321-323
|
10.1016/S0370-2693(00)01118-7
| null |
hep-th cond-mat
| null |
We derive an effective action for Dirac fermions coupled to O(3) non-linear
sigma-model (NLSM) through the Yukawa-type interaction. The nonperturbative
(global) quantum anomaly of this model results in a Hopf term for the effective
NLSM. We obtain this term using the ``embedding'' of the CP$^1$ model into the
CP$^M$ generalization of the model which makes the quantum anomaly
perturbative. This perturbative anomaly is calculated by means of a gradient
expansion of a fermionic determinant and is given by the Chern-Simons term for
an auxiliary gauge field.
|
[{'version': 'v1', 'created': 'Tue, 16 May 2000 21:25:59 GMT'}
{'version': 'v2', 'created': 'Mon, 31 Jul 2000 21:57:56 GMT'}]
|
2009-10-31
|
[array(['Abanov', 'Alexander G.', ''], dtype=object)]
|
7,138 |
1603.02348
|
Andrew Hayward
|
Andrew L.C. Hayward and Andrew M. Martin
|
Pfaffian States in Coupled Atom-Cavity Systems
| null |
Phys. Rev. A 93, 053614 (2016)
|
10.1103/PhysRevA.93.053614
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Coupled atom-cavity arrays, such as those described by the Jaynes-Cummings
Hubbard model, have the potential to emulate a wide range of condensed matter
phenomena. In particular, the strongly correlated states of the fractional
quantum Hall effect can be realised. At some filling fractions, the fraction
quantum Hall effect has been shown to possess ground states with non-abelian
excitations. The most well studied of these states is the Pfaffian state of
Moore and Read, which is the groundstate of a Hall Liquid with a 3-body
interaction. In this paper we show how an effective 3-body interaction can be
generated within the Cavity QED framework, and that a Pfaffian-like groundstate
of these systems exists.
|
[{'version': 'v1', 'created': 'Tue, 8 Mar 2016 01:02:57 GMT'}]
|
2016-05-25
|
[array(['Hayward', 'Andrew L. C.', ''], dtype=object)
array(['Martin', 'Andrew M.', ''], dtype=object)]
|
7,139 |
1607.03378
|
Hesham Elsawy Dr.
|
Rabe Arshad, Hesham ElSawy, Sameh Sorour, Tareq Y. Al-Naffouri, and
Mohamed-Slim Alouini
|
Cooperative Handover Management in Dense Cellular Networks
|
Globecom 2016
| null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Network densification has always been an important factor to cope with the
ever increasing capacity demand. Deploying more base stations (BSs) improves
the spatial frequency utilization, which increases the network capacity.
However, such improvement comes at the expense of shrinking the BSs'
footprints, which increases the handover (HO) rate and may diminish the
foreseen capacity gains. In this paper, we propose a cooperative HO management
scheme to mitigate the HO effect on throughput gains achieved via cellular
network densification. The proposed HO scheme relies on skipping HO to the
nearest BS at some instances along the user's trajectory while enabling
cooperative BS service during HO execution at other instances. To this end, we
develop a mathematical model, via stochastic geometry, to quantify the
performance of the proposed HO scheme in terms of coverage probability and user
throughput. The results show that the proposed cooperative HO scheme
outperforms the always best connected based association at high mobility. Also,
the value of BS cooperation along with handover skipping is quantified with
respect to the HO skipping only that has recently appeared in the literature.
Particularly, the proposed cooperative HO scheme shows throughput gains of 12%
to 27% and 17% on average, when compared to the always best connected and HO
skipping only schemes at user velocity ranging from 80 km/h to 160 Km/h,
respectively.
|
[{'version': 'v1', 'created': 'Tue, 12 Jul 2016 14:46:45 GMT'}]
|
2016-07-13
|
[array(['Arshad', 'Rabe', ''], dtype=object)
array(['ElSawy', 'Hesham', ''], dtype=object)
array(['Sorour', 'Sameh', ''], dtype=object)
array(['Al-Naffouri', 'Tareq Y.', ''], dtype=object)
array(['Alouini', 'Mohamed-Slim', ''], dtype=object)]
|
7,140 |
1612.06276
|
Andrea Orta
|
Livia Ferro, Tomasz Lukowski, Andrea Orta and Matteo Parisi
|
Tree-level scattering amplitudes from the amplituhedron
|
7 pages, 2 figures, to be published in the Journal of Physics:
Conference Series. Proceedings for the "7th Young Researcher Meeting",
Torino, 2016
| null |
10.1088/1742-6596/841/1/012037
|
LMU-ASC 66/16, QMUL-PH-16-23
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A central problem in quantum field theory is the computation of scattering
amplitudes. However, traditional methods are impractical to calculate high
order phenomenologically relevant observables. Building on a few decades of
astonishing progress in developing non-standard computational techniques, it
has been recently conjectured that amplitudes in planar N=4 super Yang-Mills
are given by the volume of the (dual) amplituhedron. After providing an
introduction to the subject at tree-level, we discuss a special class of
differential equations obeyed by the corresponding volume forms. In particular,
we show how they fix completely the amplituhedron volume for next-to-maximally
helicity violating scattering amplitudes.
|
[{'version': 'v1', 'created': 'Mon, 19 Dec 2016 17:29:03 GMT'}]
|
2017-06-28
|
[array(['Ferro', 'Livia', ''], dtype=object)
array(['Lukowski', 'Tomasz', ''], dtype=object)
array(['Orta', 'Andrea', ''], dtype=object)
array(['Parisi', 'Matteo', ''], dtype=object)]
|
7,141 |
1905.11062
|
Hanwei Wu
|
Hanwei Wu and Markus Flierl
|
Quantization-Based Regularization for Autoencoders
|
AAAI 2020
| null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Autoencoders and their variations provide unsupervised models for learning
low-dimensional representations for downstream tasks. Without proper
regularization, autoencoder models are susceptible to the overfitting problem
and the so-called posterior collapse phenomenon. In this paper, we introduce a
quantization-based regularizer in the bottleneck stage of autoencoder models to
learn meaningful latent representations. We combine both perspectives of Vector
Quantized-Variational AutoEncoders (VQ-VAE) and classical denoising
regularization methods of neural networks. We interpret quantizers as
regularizers that constrain latent representations while fostering a
similarity-preserving mapping at the encoder. Before quantization, we impose
noise on the latent codes and use a Bayesian estimator to optimize the
quantizer-based representation. The introduced bottleneck Bayesian estimator
outputs the posterior mean of the centroids to the decoder, and thus, is
performing soft quantization of the noisy latent codes. We show that our
proposed regularization method results in improved latent representations for
both supervised learning and clustering downstream tasks when compared to
autoencoders using other bottleneck structures.
|
[{'version': 'v1', 'created': 'Mon, 27 May 2019 09:11:37 GMT'}
{'version': 'v2', 'created': 'Wed, 22 Jan 2020 05:01:32 GMT'}]
|
2020-01-23
|
[array(['Wu', 'Hanwei', ''], dtype=object)
array(['Flierl', 'Markus', ''], dtype=object)]
|
7,142 |
astro-ph/0401285
|
Yuki Kaneko
|
Y. Kaneko (1), R. D. Preece (1), M. M. Gonzalez (2 and 3), B. L.
Dingus (3), M. S. Briggs (1) ((1) UAH / NSSTC, (2) University of Wisconsin,
(3) LANL)
|
Spectral Evolution of Two High-Energy Gamma-Ray Bursts
|
8 pages, 2 figures, to appear in the proceedings of "Astrophysical
Particle Acceleration in Geospace and Beyond", Chattanooga, 2002, AGU
monograph
| null |
10.1029/156GM29
| null |
astro-ph
| null |
The prompt emission of the gamma-ray bursts is found to be very energetic,
releasing ~10^51 ergs in a flash. However, their emission mechanism remains
unclear and understanding their spectra is a key to determining the emission
mechanism. Many GRB spectra have been analyzed in the sub-MeV energy band, and
are usually well described with a smoothly broken power-law model. We present a
spectral analysis of two bright bursts (GRB910503 and GRB930506), using BATSE
and EGRET spectra that cover more than four decades of energy (30 keV - 200
MeV). Our results show time evolutions of spectral parameters (low-energy &
high-energy photon indices and break energy) that are difficult to reconcile
with a simple shock-acceleration model.
|
[{'version': 'v1', 'created': 'Thu, 15 Jan 2004 03:07:04 GMT'}]
|
2015-06-24
|
[array(['Kaneko', 'Y.', '', '2 and 3'], dtype=object)
array(['Preece', 'R. D.', '', '2 and 3'], dtype=object)
array(['Gonzalez', 'M. M.', '', '2 and 3'], dtype=object)
array(['Dingus', 'B. L.', ''], dtype=object)
array(['Briggs', 'M. S.', ''], dtype=object)]
|
7,143 |
0907.0756
|
Volker D. Burkert
|
Volker D. Burkert
|
Deeply Virtual Compton Scattering with Positron Beams at Jefferson Lab
|
6 pages, 4 figures, invited talk at the Workshop on Positron beams
JLab, Newport News, March, 2009
|
AIP Conf.Proc.1160:43-48,2009
|
10.1063/1.3232032
| null |
nucl-ex hep-ex nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A brief discussion of the DVCS program at the Jefferson Lab 12 GeV energy
upgrade is given. Emphasis is on what can be learned from using both polarized
electron and polarized positron beams in conjunction with polarized nucleon
targets.
|
[{'version': 'v1', 'created': 'Sat, 4 Jul 2009 13:04:59 GMT'}]
|
2009-10-08
|
[array(['Burkert', 'Volker D.', ''], dtype=object)]
|
7,144 |
1412.6430
|
Chad M. Topaz
|
Chad M. Topaz, Lori Ziegelmeier, Tom Halverson
|
Topological Data Analysis of Biological Aggregation Models
|
25 pages, 12 figures; second version contains typo corrections, minor
textual additions, and a brief discussion of computational complexity; third
version fixes one typo and adds small paragraph about topological stability
| null |
10.1371/journal.pone.0126383
| null |
q-bio.QM math.AT nlin.AO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We apply tools from topological data analysis to two mathematical models
inspired by biological aggregations such as bird flocks, fish schools, and
insect swarms. Our data consists of numerical simulation output from the models
of Vicsek and D'Orsogna. These models are dynamical systems describing the
movement of agents who interact via alignment, attraction, and/or repulsion.
Each simulation time frame is a point cloud in position-velocity space. We
analyze the topological structure of these point clouds, interpreting the
persistent homology by calculating the first few Betti numbers. These Betti
numbers count connected components, topological circles, and trapped volumes
present in the data. To interpret our results, we introduce a visualization
that displays Betti numbers over simulation time and topological persistence
scale. We compare our topological results to order parameters typically used to
quantify the global behavior of aggregations, such as polarization and angular
momentum. The topological calculations reveal events and structure not captured
by the order parameters.
|
[{'version': 'v1', 'created': 'Fri, 19 Dec 2014 16:44:03 GMT'}
{'version': 'v2', 'created': 'Fri, 13 Feb 2015 19:29:09 GMT'}
{'version': 'v3', 'created': 'Wed, 11 Mar 2015 16:54:37 GMT'}]
|
2018-11-21
|
[array(['Topaz', 'Chad M.', ''], dtype=object)
array(['Ziegelmeier', 'Lori', ''], dtype=object)
array(['Halverson', 'Tom', ''], dtype=object)]
|
7,145 |
1603.02029
|
Salem Hegazy Mr.
|
Salem F. Hegazy, Ahmed E. Morra, Salah S. A. Obayya
|
Encoding M classical bits in the arrival time of dense-coded photons
|
SPIE 2016
| null |
10.1117/12.2227482
| null |
quant-ph physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a scheme to encode M extra classical bits to a dense-coded pair of
photons. By tuning the delay of an entangled pair of photons to one of 2^M
time-bins and then applying one of the quantum dense coding protocols, a
receiver equipped with a synchronized clock of reference is able to decode M
bits (via classical time-bin encoding) + 2 bits (via quantum dense coding).
This protocol, yet simple, does not dispense several special features of the
used programmable delay apparatus to maintain the coherence of the two-photon
state. While this type of time-domain encoding may be thought to be ideally of
boundless photonic capacity (by increasing the number of available time-bins),
errors due to the environmental noise and the imperfect devices and channel
evolve with the number of time-bins.
|
[{'version': 'v1', 'created': 'Mon, 7 Mar 2016 12:26:17 GMT'}]
|
2016-08-24
|
[array(['Hegazy', 'Salem F.', ''], dtype=object)
array(['Morra', 'Ahmed E.', ''], dtype=object)
array(['Obayya', 'Salah S. A.', ''], dtype=object)]
|
7,146 |
1305.4010
|
Darryl D. Holm
|
Darryl D. Holm and Rossen I. Ivanov
|
Matrix G-Strands
|
COMMENTS WELCOME!
| null |
10.1088/0951-7715/27/6/1445
| null |
math-ph math.MP nlin.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss three examples in which one may extend integrable
Euler--Poincar\'e ODEs to integrable Euler--Poincar\'e PDEs in the matrix
G-Strand context. After describing matrix G-Strand examples for $SO(3)$ and
$SO(4)$ we turn our attention to $SE(3)$ where the matrix G-Strand equations
recover the exact rod theory in the convective representation. We then find a
zero curvature representation (ZCR) of these equations and establish the
conditions under which they are completely integrable. Thus, the G-Strand
equations turn out to be a rich source of integrable systems. The treatment is
meant to be expository and most concepts are explained in examples in the
language of vectors in $\mathbb{R}^3$.
|
[{'version': 'v1', 'created': 'Fri, 17 May 2013 08:22:07 GMT'}
{'version': 'v2', 'created': 'Sun, 9 Feb 2014 23:01:37 GMT'}]
|
2015-06-16
|
[array(['Holm', 'Darryl D.', ''], dtype=object)
array(['Ivanov', 'Rossen I.', ''], dtype=object)]
|
7,147 |
2212.04629
|
Julius Adebayo
|
Julius Adebayo, Michael Muelly, Hal Abelson, Been Kim
|
Post hoc Explanations may be Ineffective for Detecting Unknown Spurious
Correlation
| null |
ICLR 2022 conference paper
| null | null |
cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate whether three types of post hoc model explanations--feature
attribution, concept activation, and training point ranking--are effective for
detecting a model's reliance on spurious signals in the training data.
Specifically, we consider the scenario where the spurious signal to be detected
is unknown, at test-time, to the user of the explanation method. We design an
empirical methodology that uses semi-synthetic datasets along with
pre-specified spurious artifacts to obtain models that verifiably rely on these
spurious training signals. We then provide a suite of metrics that assess an
explanation method's reliability for spurious signal detection under various
conditions. We find that the post hoc explanation methods tested are
ineffective when the spurious artifact is unknown at test-time especially for
non-visible artifacts like a background blur. Further, we find that feature
attribution methods are susceptible to erroneously indicating dependence on
spurious signals even when the model being explained does not rely on spurious
artifacts. This finding casts doubt on the utility of these approaches, in the
hands of a practitioner, for detecting a model's reliance on spurious signals.
|
[{'version': 'v1', 'created': 'Fri, 9 Dec 2022 02:05:39 GMT'}]
|
2022-12-12
|
[array(['Adebayo', 'Julius', ''], dtype=object)
array(['Muelly', 'Michael', ''], dtype=object)
array(['Abelson', 'Hal', ''], dtype=object)
array(['Kim', 'Been', ''], dtype=object)]
|
7,148 |
0908.2331
|
Dmitry Karlovets
|
D.V. Karlovets, A.P. Potylitsyn
|
Generalized surface current method in the macroscopic theory of
diffraction radiation
|
8 pages, 8 figures
|
Phys.Lett.A373:1988,2009
|
10.1016/j.physleta.2009.03.060
| null |
physics.acc-ph physics.class-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The surface current method known in the theory of electromagnetic waves
diffraction is generalized to be applied for the problems of diffraction
radiation generated by a charged particle moving nearby an ideally-conducting
screen in vacuum. An expression for induced surface current density leading to
the exact results in the theory of transition radiation is derived, and by
using this expression several exact solutions of diffraction radiation problems
are found. Limits of applicability for the earlier known models based on the
surface current conception are indicated. Properties of radiation from a
semi-plane and from a slit in cylinder are investigated at the various
distances to observer.
|
[{'version': 'v1', 'created': 'Mon, 17 Aug 2009 12:19:55 GMT'}]
|
2009-11-05
|
[array(['Karlovets', 'D. V.', ''], dtype=object)
array(['Potylitsyn', 'A. P.', ''], dtype=object)]
|
7,149 |
2207.03321
|
Kyle Kelley
|
Kyle P. Kelley, Sergei V. Kalinin, Eugene Eliseev, Shivaranjan
Raghuraman, Stephen Jesse, Peter Maksymovych, and Anna N. Morozovska
|
Probing temperature-induced phase transitions at individual
ferroelectric domain walls
| null | null | null | null |
cond-mat.mtrl-sci cond-mat.mes-hall physics.ins-det
|
http://creativecommons.org/licenses/by/4.0/
|
Ferroelectric domain walls have emerged as one of the most fascinating
objects in condensed matter physics due to the broad variability of functional
behaviors they exhibit. However, the vast majority of domain walls studies have
been focused on bias-induced dynamics and transport behaviors. Here, we
introduce the scanning probe microscopy approach based on piezoresponse force
microscopy (PFM) with a dynamically heated probe, combining local heating and
local biasing of the material. This approach is used to explore the thermal
polarization dynamics in soft Sn2P2S6 ferroelectrics, and allows for the
exploration of phase transitions at individual domain walls. The strong and
weak modulation regimes for the thermal PFM are introduced. The future
potential applications of heated probe approach for functional SPM measurements
including piezoelectric, elastic, microwave, and transport measurements are
discussed.
|
[{'version': 'v1', 'created': 'Thu, 7 Jul 2022 14:26:08 GMT'}]
|
2022-07-08
|
[array(['Kelley', 'Kyle P.', ''], dtype=object)
array(['Kalinin', 'Sergei V.', ''], dtype=object)
array(['Eliseev', 'Eugene', ''], dtype=object)
array(['Raghuraman', 'Shivaranjan', ''], dtype=object)
array(['Jesse', 'Stephen', ''], dtype=object)
array(['Maksymovych', 'Peter', ''], dtype=object)
array(['Morozovska', 'Anna N.', ''], dtype=object)]
|
7,150 |
2004.14735
|
EPTCS
|
Max S. New, Sam Lindley
|
Proceedings Eighth Workshop on Mathematically Structured Functional
Programming
| null |
EPTCS 317, 2020
|
10.4204/EPTCS.317
| null |
cs.PL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This volume contains the proceedings of the Eighth Workshop on Mathematically
Structured Functional Programming (MSFP 2020). The meeting was originally
scheduled to take place in Dublin, Ireland on the 25th of April as a satellite
event of the European Joint Conferences on Theory & Practice of Software (ETAPS
2020).
Due to the COVID-19 pandemic, ETAPS 2020, and consequently MSFP 2020, has
been postponed to a date yet to be determined.
The MSFP workshop highlights applications of mathematical structures to
programming applications. We promote the use of category theory, type theory,
and formal language semantics to the development of simple and reasonable
programs. This year's papers cover a variety of topics ranging from array
programming to dependent types to effects.
|
[{'version': 'v1', 'created': 'Thu, 30 Apr 2020 12:50:47 GMT'}]
|
2020-05-01
|
[array(['New', 'Max S.', ''], dtype=object)
array(['Lindley', 'Sam', ''], dtype=object)]
|
7,151 |
1701.07055
|
Felipe Favaro De Oliveira
|
Felipe F\'avaro de Oliveira, Denis Antonov, Ya Wang, Philipp Neumann,
S. Ali Momenzadeh, Timo H\"au{\ss}ermann, Alberto Pasquarelli, Andrej
Denisenko, and J\"org Wrachtrup
|
Tailoring spin defects in diamond
| null | null |
10.1038/ncomms15409
| null |
cond-mat.mtrl-sci cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Atomic-size spin defects in solids are unique quantum systems. Most
applications require nanometer positioning accuracy, which is typically
achieved by low energy ion implantation. So far, a drawback of this technique
is the significant residual implantation-induced damage to the lattice, which
strongly degrades the performance of spins in quantum applications. In this
letter we show that the charge state of implantation-induced defects
drastically influences the formation of lattice defects during thermal
annealing. We demonstrate that charging of vacancies localized at e.g.
individual nitrogen implantation sites suppresses the formation of vacancy
complexes, resulting in a tenfold-improved spin coherence time of single
nitrogen-vacancy (NV) centers in diamond. This has been achieved by confining
implantation defects into the space charge layer of free carriers generated by
a nanometer-thin boron-doped diamond structure. Besides, a twofold-improved
yield of formation of NV centers is observed. By combining these results with
numerical calculations, we arrive at a quantitative understanding of the
formation and dynamics of the implanted spin defects. The presented results
pave the way for improved engineering of diamond spin defect quantum devices
and other solid-state quantum systems.
|
[{'version': 'v1', 'created': 'Tue, 24 Jan 2017 19:47:03 GMT'}]
|
2017-05-29
|
[array(['de Oliveira', 'Felipe Fávaro', ''], dtype=object)
array(['Antonov', 'Denis', ''], dtype=object)
array(['Wang', 'Ya', ''], dtype=object)
array(['Neumann', 'Philipp', ''], dtype=object)
array(['Momenzadeh', 'S. Ali', ''], dtype=object)
array(['Häußermann', 'Timo', ''], dtype=object)
array(['Pasquarelli', 'Alberto', ''], dtype=object)
array(['Denisenko', 'Andrej', ''], dtype=object)
array(['Wrachtrup', 'Jörg', ''], dtype=object)]
|
7,152 |
cond-mat/0208237
|
Zuo-Guang Ye
|
A.A. Bokov and Z.-G. Ye
|
Ferroelectric Properties of Monoclinic Pb(Mg1/3Nb2/3)O3 - PbTiO3
Crystals
|
PDF file. 6 pages, 4 figures
| null |
10.1103/PhysRevB.66.094112
| null |
cond-mat.mtrl-sci
| null |
A monoclinic phase was recently discovered near the morphotropic phase
boundary in several high-performance piezoelectric perovskite solid solutions,
but its properties have not been reported. In this paper the dielectric, piezo-
and ferroelectric properties of the monoclinic Pm phase in the
(1-x)Pb(Mg1/3Nb2/3)O3 -xPbTiO3 perovskite system are studied. In a
(001)-oriented crystal of composition x=0.33, ferroelectric hysteresis loops
with remanent polarization of 23 uC/cm^2 are displayed. In poled monoclinic
crystals, under unipolar drive up to 10 kV/cm, the domain walls remain
unchanged, the polarization and longitudinal strain change almost linearly, but
the piezoelectric response (d33=9x10^(-10) C/N) is much weaker than in the
rhombohedral phase of close composition. The relative dielectric permittivity
of the Pm phase is also smaller (with a small-signal value of ~ 2500), but the
piezoelectric constant (g33 = 3 x10^(-2) m^2/C) and the electromechanical
coupling factor (kt = 0.60) are practically the same as in the rhombohedral
phase. The properties of the various phases in the range of the morphotropic
phase boundary are related to the different rotation paths of the polarization
vector induced by the external drive.
|
[{'version': 'v1', 'created': 'Mon, 12 Aug 2002 21:16:21 GMT'}]
|
2016-08-31
|
[array(['Bokov', 'A. A.', ''], dtype=object)
array(['Ye', 'Z. -G.', ''], dtype=object)]
|
7,153 |
1310.5358
|
Markus Uhlmann
|
Markus Uhlmann and Jan Dusek
|
The motion of a single heavy sphere in ambient fluid: a benchmark for
interface-resolved particulate flow simulations with significant relative
velocities
|
data-set available at http://www.ifh.kit.edu/dns_data ; manuscript
accepted for publication in Int. J. Multiphase Flow (2013)
| null |
10.1016/j.ijmultiphaseflow.2013.10.010
| null |
physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Detailed data describing the motion of a rigid sphere settling in unperturbed
fluid is generated by means of highly-accurate spectral/spectral-element
simulations with the purpose of serving as a future benchmark case. A single
solid-to-fluid density ratio of 1.5 is chosen, while the value of the Galileo
number is varied from 144 to 250 such as to cover the four basic regimes of
particle motion (steady vertical, steady oblique, oscillating oblique,
chaotic). This corresponds to a range of the particle Reynolds number from 185
to 365. In addition to the particle velocity data, extracts of the fluid
velocity field are provided, as well as the pressure distribution on the
sphere's surface. Furthermore, the same solid-fluid system is simulated with a
particular non-boundary-conforming approach, i.e. the immersed boundary method
proposed by Uhlmann (JCP 2005), using various spatial resolutions. It is shown
that the current benchmark case allows to adjust the resolution requirements
for a given error tolerance in each flow regime.
|
[{'version': 'v1', 'created': 'Sun, 20 Oct 2013 18:39:48 GMT'}
{'version': 'v2', 'created': 'Fri, 22 Nov 2013 23:45:17 GMT'}]
|
2013-11-26
|
[array(['Uhlmann', 'Markus', ''], dtype=object)
array(['Dusek', 'Jan', ''], dtype=object)]
|
7,154 |
1304.5610
|
Bruno Scherrer
|
Boris Lesner (INRIA Nancy - Grand Est / LORIA), Bruno Scherrer (INRIA
Nancy - Grand Est / LORIA)
|
Tight Performance Bounds for Approximate Modified Policy Iteration with
Non-Stationary Policies
| null | null | null | null |
math.OC cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider approximate dynamic programming for the infinite-horizon
stationary $\gamma$-discounted optimal control problem formalized by Markov
Decision Processes. While in the exact case it is known that there always
exists an optimal policy that is stationary, we show that when using value
function approximation, looking for a non-stationary policy may lead to a
better performance guarantee. We define a non-stationary variant of MPI that
unifies a broad family of approximate DP algorithms of the literature. For this
algorithm we provide an error propagation analysis in the form of a performance
bound of the resulting policies that can improve the usual performance bound by
a factor $O(1-\gamma)$, which is significant when the discount factor $\gamma$
is close to 1. Doing so, our approach unifies recent results for Value and
Policy Iteration. Furthermore, we show, by constructing a specific
deterministic MDP, that our performance guarantee is tight.
|
[{'version': 'v1', 'created': 'Sat, 20 Apr 2013 08:45:37 GMT'}]
|
2013-04-23
|
[array(['Lesner', 'Boris', '', 'INRIA Nancy - Grand Est / LORIA'],
dtype=object)
array(['Scherrer', 'Bruno', '', 'INRIA\n Nancy - Grand Est / LORIA'],
dtype=object) ]
|
7,155 |
nucl-ex/0306001
|
David d'Enterria
|
David d'Enterria (for the PHENIX collaboration)
|
High p_T identified particles in PHENIX: data vs. theory
|
To appear in the proceedings of 19th Winter Workshop on Nuclear
Dynamics, Breckenridge, Colorado, US, March 8-15, 2003
|
Heavy Ion Phys.21:221-228,2004
|
10.1556/APH.21.2004.2-4.19
| null |
nucl-ex hep-ex
| null |
Two of the most interesting experimental results of heavy-ion reactions at
RHIC collider energies are in the hard scattering sector where central Au+Au
data show a very different behaviour compared to p+p and peripheral Au+Au
collisions. The so-called ``high p_T pi^0 suppression'' and the ``anomalous''
baryon/meson ratio observed by PHENIX in central Au+Au collisions at
sqrt(s_{NN}) = 200 GeV are reviewed and compared to various theoretical
calculations based on different strongly interacting medium scenarios.
|
[{'version': 'v1', 'created': 'Sat, 31 May 2003 06:05:47 GMT'}]
|
2014-11-18
|
[array(["d'Enterria", 'David', '', 'for the PHENIX collaboration'],
dtype=object) ]
|
7,156 |
1301.2419
|
Guillaume Rond
|
Guillaume Rond
|
Lojasiewicz inequality over the ring of power series in two variables
|
To appear in Math. Res. Lett
| null | null | null |
math.AC math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove a Lojasiewicz type inequality for a system of polynomial equations
with coefficients in the ring of formal power series in two variables. This
result is an effective version of the Strong Artin Approximation Theorem. From
this result we deduce a bound of Artin functions of isolated singularities.
|
[{'version': 'v1', 'created': 'Fri, 11 Jan 2013 08:50:17 GMT'}]
|
2013-01-14
|
[array(['Rond', 'Guillaume', ''], dtype=object)]
|
7,157 |
1111.3284
|
Juergen Knobloch
|
J\"urgen Knobloch
|
Can the neutrino speed anomaly be defended?
| null | null | null | null |
hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The OPERA collaboration reported [1] a measurement of the neutrino velocity
exceeding the speed of light by 0.025%. For the 730 km distance from CERN in
Geneva to the OPERA experiment an early arrival of the neutrinos of 60.7 ns is
measured with an accuracy of \pm6.9 ns (stat.) and \pm7.4 ns (sys.). A basic
assumption in the analysis is that the proton time structure represents exactly
the time structure of the neutrino flux. In this manuscript, we challenge this
assumption. We identify two main origins of systematic effects: a group delay
due to low pass filters acting on the particular shape of the proton time
distribution and a movement of the proton beam at the target during the leading
and trailing slopes of the spill.
|
[{'version': 'v1', 'created': 'Mon, 14 Nov 2011 17:07:08 GMT'}]
|
2011-11-15
|
[array(['Knobloch', 'Jürgen', ''], dtype=object)]
|
7,158 |
1111.1176
|
Alexey Sokolik
|
Yu. E. Lozovik, A. A. Sokolik
|
Influence of Landau level mixing on the properties of elementary
excitations in graphene in strong magnetic field
|
Ref. [26] was added and Ref. [18] was updated
|
Nanoscale Research Letters 7, 134 (2012)
|
10.1186/1556-276X-7-134
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Massless Dirac electrons in graphene fill Landau levels with energies scaled
as square roots of their numbers. Coulomb interaction between electrons leads
to mixing of different Landau levels. The relative strength of this interaction
depends only on dielectric susceptibility of surrounding medium and can be
large in suspended graphene. We consider influence of Landau level mixing on
the properties of magnetoexcitons and magnetoplasmons - elementary
electron-hole excitations in graphene in quantizing magnetic field. We show
that, at small enough background dielectric screening, the mixing leads to very
essential change of magnetoexciton and magnetoplasmon dispersion laws in
comparison with the lowest Landau level approximation.
|
[{'version': 'v1', 'created': 'Fri, 4 Nov 2011 16:38:04 GMT'}
{'version': 'v2', 'created': 'Fri, 13 Jan 2012 16:59:06 GMT'}]
|
2012-07-10
|
[array(['Lozovik', 'Yu. E.', ''], dtype=object)
array(['Sokolik', 'A. A.', ''], dtype=object)]
|
7,159 |
math-ph/0307033
|
Michel Planat
|
Michel Planat
|
Quantum $1/f$ Noise in Equilibrium: from Planck to Ramanujan
|
slightly expanded version of a text published in Physica A
|
Physica A 318, 371 (2003)
|
10.1016/S0378-4371(02)01659-X
| null |
math-ph math.MP math.NT
| null |
We describe a new model of massless thermal bosons which predicts an
hyperbolic fluctuation spectrum at low frequencies. It is found that the
partition function per mode is the Euler generating function for unrestricted
partitions $p(n)$. Thermodynamical quantities carry a strong arithmetical
structure: they are given by series with Fourier coefficients equal to
summatory functions $\sigma_k(n)$ of the power of divisors, with $k=-1$ for the
free energy, $k=0$ for the number of particles and $k=1$ for the internal
energy. Low frequency contributions are calculated using Mellin transform
methods. In particular the internal energy per mode diverges as
$\frac{\tilde{E}}{kT}=\frac{\pi^2}{6 x}$ with $x=\frac{h \nu}{kT}$ in contrast
to the Planck energy $\tilde{E}=kT$. The theory is applied to calculate
corrections in black body radiation and in the Debye solid. Fractional energy
fluctuations are found to show a $1/\nu$ power spectrum in the low frequency
range. A satisfactory model of frequency fluctuations in a quartz crystal
resonator follows. A sketch of the whole Ramanujan--Rademacher theory of
partitions is reminded as well.
|
[{'version': 'v1', 'created': 'Wed, 16 Jul 2003 14:34:16 GMT'}]
|
2009-11-10
|
[array(['Planat', 'Michel', ''], dtype=object)]
|
7,160 |
1311.6835
|
Grant Meadors
|
Grant David Meadors (1), Keita Kawabe (2), Keith Riles (1) ((1)
University of Michigan Ann Arbor, (2) LIGO Hanford Observatory)
|
Increasing LIGO sensitivity by feedforward subtraction of auxiliary
length control noise
|
24 pages, 15 figures; accepted for publication in Classical and
Quantum Gravity
|
Class. Quantum Grav. 31 (2014) 105014
|
10.1088/0264-9381/31/10/105014
|
LIGO P1300193
|
astro-ph.IM gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
LIGO, the Laser Interferometer Gravitational-wave Observatory, has been
designed and constructed to measure gravitational wave strain via differential
arm length. The LIGO 4-km Michelson arms with Fabry-Perot cavities have
auxiliary length control servos for suppressing Michelson motion of the
beam-splitter and arm cavity input mirrors, which degrades interferometer
sensitivity. We demonstrate how a post-facto pipeline (AMPS) improves a data
sample from LIGO Science Run 6 with feedforward subtraction. Dividing data into
1024-second windows, we numerically fit filter functions representing the
frequency-domain transfer functions from Michelson length channels into the
gravitational-wave strain data channel for each window, then subtract the
filtered Michelson channel noise (witness) from the strain channel (target). In
this paper we describe the algorithm, assess achievable improvements in
sensitivity to astrophysical sources, and consider relevance to future
interferometry.
|
[{'version': 'v1', 'created': 'Tue, 26 Nov 2013 22:35:45 GMT'}
{'version': 'v2', 'created': 'Thu, 24 Apr 2014 11:33:04 GMT'}]
|
2016-04-28
|
[array(['Meadors', 'Grant David', ''], dtype=object)
array(['Kawabe', 'Keita', ''], dtype=object)
array(['Riles', 'Keith', ''], dtype=object)]
|
7,161 |
astro-ph/0306301
|
Ramakant Singh Yadav
|
R. K. S. Yadav and Ram Sagar
|
UBVRI CCD photometry of the OB associations Bochum 1 and Bochum 6
|
14 pages, 7 figures, 6 tables. Accepted for Bull. Astr. Soc. India
| null | null | null |
astro-ph
| null |
We report the first deep $UBVRI$ CCD photometry of 2460 stars in the field of
two poorly studied OB associations Bochum 1 and Bochum 6. We selected 15 and 14
probable members in Bochum 1 and Bochum 6 respectively using photometric
criteria and proper motion data of Tycho 2. Our analysis indicates variable
reddening having mean value of $E(B-V)=$ 0.47$\pm$0.10 and 0.71$\pm$0.13 mag
for Bochum 1 and Bochum 6 respectively. Using the zero-age main-sequence
fitting method, we derive a distance of 2.8$\pm$0.4 and 2.5$\pm$0.4 Kpc for
Bochum 1 and Bochum 6 respectively. We obtain an age of 10$\pm$5 Myrs for both
the associations from isochrone fitting. In both associations high and low mass
stars have probably formed together. Within the observational uncertainties,
mass spectrum of the both associations appears to be similar to the Salpeter's
one.
|
[{'version': 'v1', 'created': 'Mon, 16 Jun 2003 02:27:19 GMT'}]
|
2007-05-23
|
[array(['Yadav', 'R. K. S.', ''], dtype=object)
array(['Sagar', 'Ram', ''], dtype=object)]
|
7,162 |
1707.06387
|
Joohyung Lee
|
Joohyung Lee, Nikhil Loney, Yunsong Meng
|
Representing Hybrid Automata by Action Language Modulo Theories
|
Paper presented at the 33nd International Conference on Logic
Programming (ICLP 2017), Melbourne, Australia, August 28 to September 1, 2017
16 pages, LaTeX
| null | null | null |
cs.AI cs.FL cs.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Both hybrid automata and action languages are formalisms for describing the
evolution of dynamic systems. This paper establishes a formal relationship
between them. We show how to succinctly represent hybrid automata in an action
language which in turn is defined as a high-level notation for answer set
programming modulo theories (ASPMT) --- an extension of answer set programs to
the first-order level similar to the way satisfiability modulo theories (SMT)
extends propositional satisfiability (SAT). We first show how to represent
linear hybrid automata with convex invariants by an action language modulo
theories. A further translation into SMT allows for computing them using SMT
solvers that support arithmetic over reals. Next, we extend the representation
to the general class of non-linear hybrid automata allowing even non-convex
invariants. We represent them by an action language modulo ODE (Ordinary
Differential Equations), which can be compiled into satisfiability modulo ODE.
We developed a prototype system cplus2aspmt based on these translations, which
allows for a succinct representation of hybrid transition systems that can be
computed effectively by the state-of-the-art SMT solver dReal.
|
[{'version': 'v1', 'created': 'Thu, 20 Jul 2017 06:37:40 GMT'}
{'version': 'v2', 'created': 'Tue, 25 Jul 2017 20:06:36 GMT'}]
|
2017-07-27
|
[array(['Lee', 'Joohyung', ''], dtype=object)
array(['Loney', 'Nikhil', ''], dtype=object)
array(['Meng', 'Yunsong', ''], dtype=object)]
|
7,163 |
astro-ph/0107044
|
Gavin Rowell
|
F.A. Aharonian, A.G. Akhperjanian, J.A. Barrio, HEGRA Collaboration
|
A study of Tycho's SNR at TeV energies with the HEGRA CT-System
|
9 pages, 6 figures. Accepted for publication in Astronomy and
Astrophysics
|
Astron.Astrophys. 373 (2001) 292
|
10.1051/0004-6361:20010591
| null |
astro-ph
| null |
Tycho's supernova remnant (SNR) was observed during 1997 and 1998 with the
HEGRA Cherenkov Telescope System in a search for gamma-ray emission at
energies above
~1 TeV. An analysis of these data, ~65 hours in total, resulted in no
evidence for TeV gamma-ray emission. The 3sigma upper limit to the gamma-ray
flux (>1 TeV) from Tycho is estimated at 5.78x10^{-13} photons cm^{-2} s^{-1},
or 33 milli-Crab. We interpret our upper limit within the framework of the
following scenarios:
(1) that the observed hard X-ray tail is due to synchrotron emission. A lower
limit on the magnetic field within Tycho may be estimated B>=22 microG,
assuming that the RXTE-detected
X-rays were due to synchrotron emission. However, using results from a
detailed model of the ASCA emission, a more conservative lower limit B>=6
microG is derived.
(2) the hadronic model of Drury, Aharonian & Voelk, and (3) the more recent
time-dependent kinetic theory of Berezhko & Voelk.
Our upper limit lies within the range of predicted values of both hadronic
models, according to uncertainties in physical parameters of Tycho, and shock
acceleration details. In the latter case, the model was scaled to suit the
parameters of Tycho and re-normalised to account for a simplification of the
original model.
We find that we cannot rule out Tycho as a potential contributor at an
average level to the Galactic cosmic-ray flux.
|
[{'version': 'v1', 'created': 'Tue, 3 Jul 2001 09:27:50 GMT'}]
|
2016-08-30
|
[array(['Aharonian', 'F. A.', ''], dtype=object)
array(['Akhperjanian', 'A. G.', ''], dtype=object)
array(['Barrio', 'J. A.', ''], dtype=object)
array(['Collaboration', 'HEGRA', ''], dtype=object)]
|
7,164 |
1707.09626
|
Junjie Cao
|
Junjie Cao, Xiaofei Guo, Yangle He, Liangliang Shang, Yuanfang Yue
|
Sneutrino DM in the NMSSM with inverse seesaw mechanism
|
33 pages
| null |
10.1007/JHEP10(2017)044
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In supersymmetric theories like the Next-to-Minimal Supersymmetric Standard
Model (NMSSM), the lightest neutralino with bino or singlino as its dominant
component is customarily taken as dark matter (DM) candidate. Since light
Higgsinos favored by naturalness can strength the couplings of the DM and thus
enhance the DM-nucleon scattering rate, the tension between naturalness and DM
direct detection results becomes more and more acute with the improved
experimental sensitivity. In this work, we extend the NMSSM by inverse seesaw
mechanism to generate neutrino mass, and show that in certain parameter space
the lightest sneutrino may act as a viable DM candidate, i.e. it can annihilate
by multi-channels to get correct relic density and meanwhile satisfy all
experimental constraints. The most striking feature of the extension is that
the DM-nucleon scattering rate can be naturally below its current experimental
bounds regardless of the higgsino mass, and hence it alleviates the tension
between naturalness and DM experiments. Other interesting features include that
the Higgs phenomenology becomes much richer than that of the original NMSSM due
to the relaxed constraints from DM physics and also due to the presence of
extra neutrinos, and that the signatures of sparticles at colliders are quite
different from those with neutralino as DM candidate.
|
[{'version': 'v1', 'created': 'Sun, 30 Jul 2017 14:36:42 GMT'}
{'version': 'v2', 'created': 'Thu, 3 Aug 2017 08:44:06 GMT'}
{'version': 'v3', 'created': 'Thu, 28 Sep 2017 02:03:06 GMT'}]
|
2017-10-25
|
[array(['Cao', 'Junjie', ''], dtype=object)
array(['Guo', 'Xiaofei', ''], dtype=object)
array(['He', 'Yangle', ''], dtype=object)
array(['Shang', 'Liangliang', ''], dtype=object)
array(['Yue', 'Yuanfang', ''], dtype=object)]
|
7,165 |
1002.4531
|
A. Tureanu
|
Matti Raasakka and Anca Tureanu
|
On UV/IR Mixing via Seiberg-Witten Map for Noncommutative QED
|
16 pages
|
Phys.Rev.D81:125004,2010
|
10.1103/PhysRevD.81.125004
|
HIP-2010-04/TH
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider quantum electrodynamics in noncommutative spacetime by deriving a
$\theta$-exact Seiberg-Witten map with fermions in the fundamental
representation of the gauge group as an expansion in the coupling constant.
Accordingly, we demonstrate the persistence of UV/IR mixing in noncommutative
QED with charged fermions via Seiberg-Witten map, extending the results of
Schupp and You [1].
|
[{'version': 'v1', 'created': 'Wed, 24 Feb 2010 11:57:12 GMT'}]
|
2015-05-18
|
[array(['Raasakka', 'Matti', ''], dtype=object)
array(['Tureanu', 'Anca', ''], dtype=object)]
|
7,166 |
astro-ph/9610003
|
David H. Weinberg
|
David H. Weinberg
|
Galaxy Structure, Dark Matter, and Galaxy Formation
|
To appear in "Dark and Visible Matter in Galaxies and Cosmological
Implications," eds. M. Persic and P. Salucci, A.S.P. Conference Series. 20
pages, no figures, LaTex, requires paspconf.sty
| null | null | null |
astro-ph
| null |
The structure of galaxies, the nature of dark matter, and the physics of
galaxy formation were the interlocking themes of DM 1996: Dark and Visible
Matter in Galaxies and Cosmological Implications. In this conference summary
report, I review recent observational and theoretical advances in these areas,
then describe highlights of the meeting and discuss their implications. I
include as an appendix the lyrics of The Dark Matter Rap: A Cosmological
History for the MTV Generation.
|
[{'version': 'v1', 'created': 'Tue, 1 Oct 1996 08:29:13 GMT'}]
|
2007-05-23
|
[array(['Weinberg', 'David H.', ''], dtype=object)]
|
7,167 |
cond-mat/9908277
|
Randall D. Kamien
|
Randall D. Kamien
|
Chiral Interactions and Structures
|
5 pages, plain TeX (macros included), 2 included eps figures. To
appear in the Proceedings of the VIIIth Topical Meeting on Optics of Liquid
Crystals, Humacao, PR, 27 September - 1 October, 1999
|
Mol. Cryst. Liq. Cryst. 358 (2001) 97
| null | null |
cond-mat.soft cond-mat.mtrl-sci cond-mat.stat-mech
| null |
The chiral structure of liquid crystalline phases arises due to the intrinsic
chirality of the constituent mesogens. While it is seemingly straightforward to
quantify the macroscopic chirality by using, for instance, the cholesteric
pitch or the optical rotatory power, it is not as simple to quantify the
chirality of a single molecule. I will discuss a systematic quantification of
molecular chirality and show how the resulting chiral parameters may be used to
predict macroscopic chiral structure.
|
[{'version': 'v1', 'created': 'Thu, 19 Aug 1999 18:29:42 GMT'}]
|
2007-05-23
|
[array(['Kamien', 'Randall D.', ''], dtype=object)]
|
7,168 |
2104.11057
|
Lie Ju
|
Lie Ju, Xin Wang, Lin Wang, Tongliang Liu, Xin Zhao, Tom Drummond,
Dwarikanath Mahapatra, Zongyuan Ge
|
Relational Subsets Knowledge Distillation for Long-tailed Retinal
Diseases Recognition
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the real world, medical datasets often exhibit a long-tailed data
distribution (i.e., a few classes occupy most of the data, while most classes
have rarely few samples), which results in a challenging imbalance learning
scenario. For example, there are estimated more than 40 different kinds of
retinal diseases with variable morbidity, however with more than 30+ conditions
are very rare from the global patient cohorts, which results in a typical
long-tailed learning problem for deep learning-based screening models. In this
study, we propose class subset learning by dividing the long-tailed data into
multiple class subsets according to prior knowledge, such as regions and
phenotype information. It enforces the model to focus on learning the
subset-specific knowledge. More specifically, there are some relational classes
that reside in the fixed retinal regions, or some common pathological features
are observed in both the majority and minority conditions. With those subsets
learnt teacher models, then we are able to distill the multiple teacher models
into a unified model with weighted knowledge distillation loss. The proposed
framework proved to be effective for the long-tailed retinal diseases
recognition task. The experimental results on two different datasets
demonstrate that our method is flexible and can be easily plugged into many
other state-of-the-art techniques with significant improvements.
|
[{'version': 'v1', 'created': 'Thu, 22 Apr 2021 13:39:33 GMT'}]
|
2021-04-23
|
[array(['Ju', 'Lie', ''], dtype=object)
array(['Wang', 'Xin', ''], dtype=object)
array(['Wang', 'Lin', ''], dtype=object)
array(['Liu', 'Tongliang', ''], dtype=object)
array(['Zhao', 'Xin', ''], dtype=object)
array(['Drummond', 'Tom', ''], dtype=object)
array(['Mahapatra', 'Dwarikanath', ''], dtype=object)
array(['Ge', 'Zongyuan', ''], dtype=object)]
|
7,169 |
1710.09598
|
Nhien-An Le-Khac
|
Christopher Warren, Eman El-Sheikh, Nhien-An Le-Khac
|
Privacy Preserving Internet Browsers: Forensic Analysis of Browzar
| null | null | null | null |
cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
With the advance of technology, Criminal Justice agencies are being
confronted with an increased need to investigate crimes perpetuated partially
or entirely over the Internet. These types of crime are known as cybercrimes.
In order to conceal illegal online activity, criminals often use private
browsing features or browsers designed to provide total browsing privacy. The
use of private browsing is a common challenge faced in for example child
exploitation investigations, which usually originate on the Internet. Although
private browsing features are not designed specifically for criminal activity,
they have become a valuable tool for criminals looking to conceal their online
activity. As such, Technological Crime units often focus their forensic
analysis on thoroughly examining the web history on a computer. Private
browsing features and browsers often require a more in-depth, post mortem
analysis. This often requires the use of multiple tools, as well as different
forensic approaches to uncover incriminating evidence. This evidence may be
required in a court of law, where analysts are often challenged both on their
findings and on the tools and approaches used to recover evidence. However,
there are very few research on evaluating of private browsing in terms of
privacy preserving as well as forensic acquisition and analysis of privacy
preserving internet browsers. Therefore in this chapter, we firstly review the
private mode of popular internet browsers. Next, we describe the forensic
acquisition and analysis of Browzar, a privacy preserving internet browser and
compare it with other popular internet browsers
|
[{'version': 'v1', 'created': 'Thu, 26 Oct 2017 09:04:53 GMT'}]
|
2017-10-27
|
[array(['Warren', 'Christopher', ''], dtype=object)
array(['El-Sheikh', 'Eman', ''], dtype=object)
array(['Le-Khac', 'Nhien-An', ''], dtype=object)]
|
7,170 |
2102.02780
|
Philipp Schering
|
P. Schering, E. Evers, V. Nedelea, D. S. Smirnov, E. A. Zhukov, D. R.
Yakovlev, M. Bayer, G. S. Uhrig, A. Greilich
|
Resonant spin amplification in Faraday geometry
|
7 pages including 4 figures; 8 pages supplement including 4 figures
|
Phys. Rev. B 103, L201301 (2021)
|
10.1103/PhysRevB.103.L201301
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We demonstrate the realization of the resonant spin amplification (RSA)
effect in Faraday geometry where a magnetic field is applied parallel to the
optically induced spin polarization so that no RSA is expected. However, model
considerations predict that it can be realized for a central spin interacting
with a fluctuating spin environment. As a demonstrator, we choose an ensemble
of singly-charged (In,Ga)As/GaAs quantum dots, where the resident electron
spins interact with the surrounding nuclear spins. The observation of RSA in
Faraday geometry requires intense pump pulses with a high repetition rate and
can be enhanced by means of the spin-inertia effect. Potentially, it provides
the most direct and reliable tool to measure the longitudinal $g$ factor of the
charge carriers.
|
[{'version': 'v1', 'created': 'Thu, 4 Feb 2021 18:00:33 GMT'}
{'version': 'v2', 'created': 'Thu, 20 May 2021 13:04:01 GMT'}]
|
2021-07-09
|
[array(['Schering', 'P.', ''], dtype=object)
array(['Evers', 'E.', ''], dtype=object)
array(['Nedelea', 'V.', ''], dtype=object)
array(['Smirnov', 'D. S.', ''], dtype=object)
array(['Zhukov', 'E. A.', ''], dtype=object)
array(['Yakovlev', 'D. R.', ''], dtype=object)
array(['Bayer', 'M.', ''], dtype=object)
array(['Uhrig', 'G. S.', ''], dtype=object)
array(['Greilich', 'A.', ''], dtype=object)]
|
7,171 |
0902.3667
|
Cristiano Germani
|
Cristiano Germani (LUTH, Observatoire de Paris-Meudon) and Alex
Kehagias (NTUA, Athens)
|
P-nflation: generating cosmic Inflation with p-forms
|
v2: 15 pages; references and a section on stability added. Version
accepted for publication in JCAP
| null |
10.1088/1475-7516/2009/03/028
| null |
astro-ph.CO gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that an inflationary background might be realized by using any p-form
non-minimally coupled to gravity. Standard scalar field inflation corresponds
to the 0-form case and vector inflation to the 1-form. Moreover, we show that
the 2- and 3-form fields are dual to a new vector and scalar inflationary
theories where the kinetic terms are non-minimally coupled to gravity.
|
[{'version': 'v1', 'created': 'Fri, 20 Feb 2009 21:05:58 GMT'}
{'version': 'v2', 'created': 'Tue, 10 Mar 2009 21:31:39 GMT'}]
|
2009-11-13
|
[array(['Germani', 'Cristiano', '', 'LUTH, Observatoire de Paris-Meudon'],
dtype=object)
array(['Kehagias', 'Alex', '', 'NTUA, Athens'], dtype=object)]
|
7,172 |
1702.01669
|
Di Yang
|
Boris Dubrovin, Di Yang
|
On Gromov--Witten invariants of $\mathbb{P}^1$
|
14 pages (v2, minor changes: added references, corrected typos, added
remarks)
| null | null | null |
math.AG math-ph math.MP nlin.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a conjectural explicit formula of generating series of a new type
for Gromov--Witten invariants of $\mathbb{P}^1$ of all degrees in full genera.
|
[{'version': 'v1', 'created': 'Mon, 6 Feb 2017 15:57:49 GMT'}
{'version': 'v2', 'created': 'Tue, 5 Dec 2017 17:00:49 GMT'}]
|
2017-12-06
|
[array(['Dubrovin', 'Boris', ''], dtype=object)
array(['Yang', 'Di', ''], dtype=object)]
|
7,173 |
hep-ph/0306244
|
Oliver Schroeder
|
Oliver Schroeder, Hugo Reinhardt
|
Generalized Random Phase Approximation and Gauge Theories
|
66 pages, REVTeX4, uses amsfonts and package longtable
|
Annals Phys. 307 (2003) 452-506
|
10.1016/S0003-4916(03)00119-2
|
MIT-CTP-3355, UNITU-THEP-06/2003
|
hep-ph
| null |
Mean-field treatments of Yang-Mills theory face the problem of how to treat
the Gauss law constraint. In this paper we try to face this problem by studying
the excited states instead of the ground state. For this purpose we extend the
operator approach to the Random Phase Approximation (RPA) well-known from
nuclear physics and recently also employed in pion physics to general bosonic
theories with a standard kinetic term. We focus especially on conservation
laws, and how they are translated from the full to the approximated theories,
demonstrate that the operator approach has the same spectrum as the RPA derived
from the time-dependent variational principle, and give - for Yang-Mills theory
- a discussion of the moment of inertia connected to the energy contribution of
the zero modes to the RPA ground state energy. We also indicate a line of
thought that might be useful to improve the results of the Random Phase
Approximation.
|
[{'version': 'v1', 'created': 'Tue, 24 Jun 2003 20:22:03 GMT'}]
|
2009-11-10
|
[array(['Schroeder', 'Oliver', ''], dtype=object)
array(['Reinhardt', 'Hugo', ''], dtype=object)]
|
7,174 |
1710.04417
|
Chengyuan Wu
|
Chengyuan Wu, Bo Wang
|
Accreting CO material onto ONe white dwarfs towards accretion-induced
collapse
|
12 pages, 8 figures, 1 table, accepted for publication in Research in
Astronomy and Astrophysics (RAA)
| null |
10.1088/1674-4527/18/3/36
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The final outcomes of accreting ONe white dwarfs (ONe WDs) have been studied
for several decades, but there are still some issues not resolved. Recently,
some studies suggested that the deflagration of oxygen would occur for
accreting ONe WDs with Chandrasekhar masses. In this paper, we aim to
investigate whether ONe WDs can experience accretion-induced collapse (AIC) or
explosions when their masses approach the Chandrasekhar limit. Employing the
stellar evolution code modules for experiments in stellar astrophysics (MESA),
we simulate the long-term evolution of ONe WDs by accreting CO material. The
ONe WDs undergo weak multicycle carbon flashes during the mass-accretion
process, leading to the mass increase of the WDs. We found that different
initial WD masses and mass-accretion rates have influence on the evolution of
central density and temperature. However, the central temperature cannot reach
the explosive oxygen ignition temperature due to the neutrino cooling. This
work implies that the final outcome of accreting ONe WDs is electron-capture
induced collapse rather than thermonuclear explosion.
|
[{'version': 'v1', 'created': 'Thu, 12 Oct 2017 09:28:31 GMT'}
{'version': 'v2', 'created': 'Wed, 8 Nov 2017 01:58:04 GMT'}
{'version': 'v3', 'created': 'Mon, 5 Feb 2018 07:20:47 GMT'}]
|
2018-04-04
|
[array(['Wu', 'Chengyuan', ''], dtype=object)
array(['Wang', 'Bo', ''], dtype=object)]
|
7,175 |
0708.1036
|
Bobby Eka Gunara
|
Bobby E. Gunara and Freddy P. Zen
|
Kaehler-Ricci Flow, Morse Theory, and Vacuum Structure Deformation of
N=1 Supersymmetry in Four Dimensions
|
Typos and grammar corrected, 41 pages, published version
|
Adv.Theor.Math.Phys.13:217,2009
| null | null |
hep-th math-ph math.DG math.DS math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We address some aspects of four dimensional chiral N=1 supersymmetric
theories on which the scalar manifold is described by K\"ahler geometry and can
further be viewed as K\"ahler-Ricci soliton generating a one-parameter family
of K\"ahler geometries. All couplings and solutions, namely the BPS domain
walls and their supersymmetric Lorentz invariant vacua turn out to be evolved
with respect to the flow parameter related to the soliton. Two models are
discussed, namely N=1 theory on K\"ahler-Einstein manifold and U(n) symmetric
K\"ahler-Ricci soliton with positive definite metric. In the first case we find
that the evolution of the soliton causes topological change and
correspondingly, modifies the Morse index of the nondegenerate vacua realized
in the parity transformation of the Hessian matrix of the scalar potential
after hitting singularity, which is natural in the global theory and for
nondegenerate Minkowskian vacua of the local theory. However, such situation is
not trivial in anti de Sitter (AdS) vacua. In an explicit model, we find that
this geometric (K\"ahler-Ricci) flow can also change the index of the vacuum
before and after singularity. Finally in the second case, since around the
origin the metric is diffeomorphic to $ {\mathrm{\lC P}}^{n -1}$, we have to
consider it in the asymptotic region. Our analysis shows that no index
modification of vacua is present in both global and local theories.
|
[{'version': 'v1', 'created': 'Wed, 8 Aug 2007 05:17:18 GMT'}
{'version': 'v2', 'created': 'Sat, 17 Nov 2007 00:15:32 GMT'}
{'version': 'v3', 'created': 'Sat, 21 Jun 2008 05:15:47 GMT'}
{'version': 'v4', 'created': 'Sun, 28 Sep 2008 04:25:14 GMT'}
{'version': 'v5', 'created': 'Wed, 5 Nov 2008 03:53:35 GMT'}]
|
2009-03-12
|
[array(['Gunara', 'Bobby E.', ''], dtype=object)
array(['Zen', 'Freddy P.', ''], dtype=object)]
|
7,176 |
cond-mat/9401041
|
Brad Marston
|
H.-J. Kwon, A. Houghton, and J. B. Marston (Brown University)
|
Gauge Interactions and Bosonized Fermion Liquids
|
5 pages; RevTex 3.0; BUP-JBM-5
| null |
10.1103/PhysRevLett.73.284
| null |
cond-mat hep-th
| null |
We investigate fermion liquids interacting with longitudinal and transverse
abelian gauge fields via bosonization. In two spatial dimensions we obtain the
fermion propagator for the specific case of a Coulomb plus Chern-Simons gauge
action. We discuss the relevance of this result to the Halperin-Lee-Read theory
of the $\nu =1/2$ Landau level and demonstrate how Kohn's theorem is satisfied.
|
[{'version': 'v1', 'created': 'Thu, 20 Jan 1994 15:14:27 GMT'}]
|
2009-10-22
|
[array(['Kwon', 'H. -J.', '', 'Brown University'], dtype=object)
array(['Houghton', 'A.', '', 'Brown University'], dtype=object)
array(['Marston', 'J. B.', '', 'Brown University'], dtype=object)]
|
7,177 |
cond-mat/0202156
|
Takis Vasilopoulos
|
S. Guillon (1), P. Vasilopoulos (1), and C. M. Van Vliet (2) ((1)
Concordia University, Department of Physics, Montreal, Canada, (2) Department
of Physics, University of Miami, Coral Gables, USA)
|
Magnetoconductance of parabolically confined quasi-one dimensional
channels
|
Text (including one figure) 14 pages in Latex/Revtex format
|
J. Phys.: Condens. Matter 14, 803 (2002)
|
10.1088/0953-8984/14/4/313
| null |
cond-mat.mes-hall
| null |
Electrical conduction is studied along parabolically confined quasi-one
dimensional channels, in the framework of a revised linear-response theory, for
elastic scattering. For zero magnetic field an explicit multichannel expression
for the conductance is obtained that agrees with those of the literature. A
similar but new multichannel expression is obtained in the presence of a
magnetic field B||z perpendicular to the channel along the x axis. An explicit
connection is made between the characteristic time for the tunnel-scattering
process and the transmission and reflection coefficients that appear in either
expression. As expected, for uncoupled channels the finite field expression
gives the complete (Landauer-type) conductance of N parallel channels, a result
that has not yet been reported in the literature. In addition, it accounts
explicitly for the Hall field and the confining potential and is valid, with
slight modifications, for tilted magnetic fields in the (x,z) plane.
|
[{'version': 'v1', 'created': 'Mon, 11 Feb 2002 19:29:56 GMT'}]
|
2009-11-07
|
[array(['Guillon', 'S.', ''], dtype=object)
array(['Vasilopoulos', 'P.', ''], dtype=object)
array(['Van Vliet', 'C. M.', ''], dtype=object)]
|
7,178 |
2208.10268
|
Joshua Erlich
|
Joshua Erlich
|
A First Analysis of Stochastic Composite Gravity
|
6 pages, 2 figures
| null | null | null |
gr-qc
|
http://creativecommons.org/licenses/by/4.0/
|
We present a first analysis of a nonperturbative approach to quantum gravity
based on a representation of quantum field theory in terms of stochastic
processes. The stochastic description accommodates a physical Lorentz-invariant
ultraviolet regulator that provides a novel description of physics at
ultra-short distances. In a stochastic composite gravity model we demonstrate
the evolution of a generic initial field configuration towards an equilibrium
in which the composite spacetime metric fluctuates about a flat spacetime. We
argue that fluctuations about the vacuum give rise to an emergent gravitational
interaction consistent with Einstein gravity at long distances. We uncover a
formal similarity between regularization by stochastic discreteness and
point-splitting regularization in the corresponding quantum field theory. We
comment on the signature of the emergent spacetime, possible consequences for
the early universe, and the potential for observational and experimental tests
of the stochastic origin of quantum field theory and gravitation.
|
[{'version': 'v1', 'created': 'Fri, 19 Aug 2022 00:48:54 GMT'}]
|
2022-08-23
|
[array(['Erlich', 'Joshua', ''], dtype=object)]
|
7,179 |
2004.07991
|
Manish Kumar
|
Manish Kumar, Manjari Jain, Arunima Singh, Saswata Bhattacharya
|
Sublattice mixing in Cs$_2$AgInCl$_6$ for enhanced optical properties
from first-principles
|
23 pages, 11 figures
|
Appl. Phys. Lett. 118, 021901 (2021)
|
10.1063/5.0031336
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Lead-free double perovskite materials (viz. Cs$_2$AgInCl$_6$) are being
explored as stable and non-toxic alternatives of lead halide perovskites. In
order to expand the optical response of Cs$_2$AgInCl$_6$ in visible region, we
report here the stability, electronic structure and optical properties of
Cs$_2$AgInCl$_6$ by sublattice mixing of various elements. Here, we have
employed %high-throughput screening using a hierarchical first-principles based
approach starting from density functional theory (DFT) with appropriate
exchange-correlation functionals to beyond DFT methods under the framework of
many body perturbation theory (viz. G$_0$W$_0$@HSE06). We have started with 32
primary set of combinations of metals M(I), M(II), M(III) and halogen X at
Ag/In and Cl site, respectively, where concentration of each set is varied to
build a database of nearly 140 combinations. The most suitable mixed
sublattices are identified to engineer the band gap of Cs$_2$AgInCl$_6$ to have
its application in optoelectronic devices under visible light.
|
[{'version': 'v1', 'created': 'Thu, 16 Apr 2020 23:24:51 GMT'}
{'version': 'v2', 'created': 'Sat, 2 Jan 2021 14:29:29 GMT'}]
|
2021-01-18
|
[array(['Kumar', 'Manish', ''], dtype=object)
array(['Jain', 'Manjari', ''], dtype=object)
array(['Singh', 'Arunima', ''], dtype=object)
array(['Bhattacharya', 'Saswata', ''], dtype=object)]
|
7,180 |
1111.4226
|
Emily Fox
|
Emily B. Fox, Erik B. Sudderth, Michael I. Jordan, and Alan S. Willsky
|
Joint Modeling of Multiple Related Time Series via the Beta Process
|
33 pages, 8 figures
| null | null | null |
stat.ME stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a Bayesian nonparametric approach to the problem of jointly
modeling multiple related time series. Our approach is based on the discovery
of a set of latent, shared dynamical behaviors. Using a beta process prior, the
size of the set and the sharing pattern are both inferred from data. We develop
efficient Markov chain Monte Carlo methods based on the Indian buffet process
representation of the predictive distribution of the beta process, without
relying on a truncated model. In particular, our approach uses the sum-product
algorithm to efficiently compute Metropolis-Hastings acceptance probabilities,
and explores new dynamical behaviors via birth and death proposals. We examine
the benefits of our proposed feature-based model on several synthetic datasets,
and also demonstrate promising results on unsupervised segmentation of visual
motion capture data.
|
[{'version': 'v1', 'created': 'Thu, 17 Nov 2011 21:28:04 GMT'}]
|
2011-11-21
|
[array(['Fox', 'Emily B.', ''], dtype=object)
array(['Sudderth', 'Erik B.', ''], dtype=object)
array(['Jordan', 'Michael I.', ''], dtype=object)
array(['Willsky', 'Alan S.', ''], dtype=object)]
|
7,181 |
2004.12688
|
Christoph Weinberger
|
Christoph Weinberger (1), Roland Diehl (1), Moritz M. M. Pleintinger
(1), Thomas Siegert (2), Jochen Greiner (1) ((1) Max-Planck-Institut f\"ur
extraterrestrische Physik, Gie{\ss}enbachstra{\ss}e, (2) Center for
Astrophysics and Space Sciences, University of California, San Diego)
|
$^{44}\rm Ti$ ejecta in young supernova remnants
|
15 pages, 11 figures, Accepted for publication in A&A
| null |
10.1051/0004-6361/202037536
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Context: Tracing unstable isotopes produced in supernova nucleosynthesis
provides a direct diagnostic of supernova explosion physics. Theoretical models
predict an extensive variety of scenarios, which can be constrained through
observations of the abundant isotopes $^{56}$Ni and $^{44}$Ti. Direct evidence
of the latter was previously found only in two core-collapse supernova events,
and appears to be absent in thermonuclear supernovae.Aims: We aim to to
constrain the supernova progenitor types of Cas A, SN 1987A, Vela Jr.,
G1.9+0.3, SN1572, and SN1604 through their $^{44}$Ti ejecta masses and
explosion kinematics. Methods: We analyzed INTEGRAL/SPI observations of the
candidate sources utilizing an empirically motivated high-precision background
model. We analyzed the three dominant spectroscopically resolved de-excitation
lines at 68, 78, and 1157\,keV emitted in the decay chain of $^{44}$Ti. The
fluxes allow the determination of the production yields of $^{44}$Ti. Remnant
kinematics were obtained from the Doppler characteristics of the lines.
Results: We find a significant signal for Cas A in all three lines with a
combined significance of 5.4$\sigma$. The fluxes are $(3.3 \pm 0.9) \times
10^{-5}$ ph cm$^{-2}$ s$^{-1}$, and $(4.2 \pm 1.0) \times 10^{-5}$ ph cm$^{-2}$
s$^{-1}$ for the $^{44}$Ti and $^{44}$Sc decay, respectively. We obtain higher
fluxes for $^{44}$Ti with our analysis of Cas A than were obtained in previous
analyses. We discuss potential differences. Conclusions: We obtain a high
$^{44}$Ti ejecta mass for Cas A that is in disagreement with ejecta yields from
symmetric 2D models. Upper limits for the other core-collapse supernovae are in
agreement with model predictions and previous studies. The upper limits we find
for the three thermonuclear supernovae consistently exclude the double
detonation and pure helium deflagration models as progenitors.
|
[{'version': 'v1', 'created': 'Mon, 27 Apr 2020 10:16:27 GMT'}]
|
2020-06-24
|
[array(['Weinberger', 'Christoph', ''], dtype=object)
array(['Diehl', 'Roland', ''], dtype=object)
array(['Pleintinger', 'Moritz M. M.', ''], dtype=object)
array(['Siegert', 'Thomas', ''], dtype=object)
array(['Greiner', 'Jochen', ''], dtype=object)]
|
7,182 |
2208.08898
|
Marcelo Lopes Pereira Junior
|
M. L. Pereira Junior, W. F. da Cunha, W. F. Giozza, R. T. de Sousa
Junior, and L. A. Ribeiro Junior
|
Irida-Graphene: A New 2D Carbon Allotrope
|
11 pages and 07 figures
| null | null | null |
cond-mat.mtrl-sci cond-mat.mes-hall
|
http://creativecommons.org/licenses/by/4.0/
|
Several 2D carbon-based materials have been computationally designed in the
last years due to the success achieved by graphene. Here, we propose a new 2D
all-sp$^2$ carbon allotrope, named Irida-Graphene (IG), using a bottom-up
approach. IG is composed of fused rings containing 3-6-8 carbon atoms. We
employed density functional theory calculations and reactive (ReaxFF) molecular
dynamics simulations to examine its mechanical, structural, electronic, and
optical properties. Results showed that IG exhibits good dynamical and thermal
stabilities. Its estimated elastic modulus varies between 80-113 GPa. IG is a
metallic material and presents a Dirac cone above the Fermi level in the center
of the band. The intense optical activity of IG is restricted to the infrared
and violet regions. IG can act as a violet collector for photon energies of
about 3.0 eV since it presents very low reflectivity and refractive index
greater than one.
|
[{'version': 'v1', 'created': 'Thu, 18 Aug 2022 15:13:56 GMT'}]
|
2022-08-19
|
[array(['Junior', 'M. L. Pereira', ''], dtype=object)
array(['da Cunha', 'W. F.', ''], dtype=object)
array(['Giozza', 'W. F.', ''], dtype=object)
array(['Junior', 'R. T. de Sousa', ''], dtype=object)
array(['Junior', 'L. A. Ribeiro', ''], dtype=object)]
|
7,183 |
0710.1121
|
Ruth Van de Water
|
Christopher Aubin, Jack Laiho, Ruth S. Van de Water
|
The kaon B-parameter from unquenched mixed action lattice QCD
|
7 pages, 4 figures. Presented at the XXV International Symposium on
Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany
|
PoS LAT2007:375,2007
| null | null |
hep-lat
| null |
We present a preliminary calculation of B_K using domain-wall valence quarks
and 2+1 flavors of improved staggered sea quarks. Both the size of the residual
quark mass, which measures the amount of chiral symmetry breaking, and of the
mixed meson splitting Delta_mix, a measure of taste-symmetry breaking, show
that discretization effects are under control in our mixed action lattice
simulations. We show preliminary data for pseudoscalar meson masses, decay
constants and B_K. We discuss general issues associated with the chiral
extrapolation of lattice data, and, as an example, present a preliminary chiral
and continuum extrapolation of f_pi. The quality of our data shows that the
good chiral properties of domain-wall quarks, in combination with the light sea
quark masses and multiple lattice spacings available with the MILC staggered
configurations, will allow for a precise determination of B_K.
|
[{'version': 'v1', 'created': 'Fri, 5 Oct 2007 02:24:30 GMT'}]
|
2011-03-23
|
[array(['Aubin', 'Christopher', ''], dtype=object)
array(['Laiho', 'Jack', ''], dtype=object)
array(['Van de Water', 'Ruth S.', ''], dtype=object)]
|
7,184 |
1404.4486
|
Rogers Mathew
|
Manu Basavaraju, L. Sunil Chandran, Martin Charles Golumbic, Rogers
Mathew, Deepak Rajendraprasad
|
Boxicity and separation dimension
|
This is the full version of a paper by the same name submitted to
WG-2014. Some results proved in this paper are also present in
arXiv:1212.6756. arXiv admin note: substantial text overlap with
arXiv:1212.6756
| null | null | null |
math.CO cs.DM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A family $\mathcal{F}$ of permutations of the vertices of a hypergraph $H$ is
called 'pairwise suitable' for $H$ if, for every pair of disjoint edges in $H$,
there exists a permutation in $\mathcal{F}$ in which all the vertices in one
edge precede those in the other. The cardinality of a smallest such family of
permutations for $H$ is called the 'separation dimension' of $H$ and is denoted
by $\pi(H)$. Equivalently, $\pi(H)$ is the smallest natural number $k$ so that
the vertices of $H$ can be embedded in $\mathbb{R}^k$ such that any two
disjoint edges of $H$ can be separated by a hyperplane normal to one of the
axes. We show that the separation dimension of a hypergraph $H$ is equal to the
'boxicity' of the line graph of $H$. This connection helps us in borrowing
results and techniques from the extensive literature on boxicity to study the
concept of separation dimension.
|
[{'version': 'v1', 'created': 'Thu, 17 Apr 2014 11:07:57 GMT'}
{'version': 'v2', 'created': 'Fri, 18 Apr 2014 08:54:12 GMT'}]
|
2014-04-21
|
[array(['Basavaraju', 'Manu', ''], dtype=object)
array(['Chandran', 'L. Sunil', ''], dtype=object)
array(['Golumbic', 'Martin Charles', ''], dtype=object)
array(['Mathew', 'Rogers', ''], dtype=object)
array(['Rajendraprasad', 'Deepak', ''], dtype=object)]
|
7,185 |
hep-ph/9403305
| null |
R. Casalbuoni, P. Chiappetta, A. Deandrea, S. De Curtis, D. Dominici
and R. Gatto
|
Pseudo Goldstones at Future Colliders from the Extended Bess Model
|
17 pages and 12 figures (included as a uuencoded tar file), LaTeX
(style article), UGVA-DPT 1994/03-845
|
Z.Phys. C65 (1995) 327-336
|
10.1007/BF01571890
| null |
hep-ph
| null |
We consider the production of the lightest pseudo-Goldstone bosons at future
colliders through the vector resonances predicted by the extended BESS model,
which consists of an effective lagrangian parametrization with dynamical
symmetry breaking, describing scalar, vector and axial-vector bound states in a
rather general framework. We find that the detection of pseudo-Goldstone pairs
at LHC requires a careful evaluation of backgrounds. For e+e- collisions in the
TeV range the backgrounds can be easily reduced and the detection of
pseudo-Goldstone pairs is generally easier.
|
[{'version': 'v1', 'created': 'Thu, 17 Mar 1994 19:45:00 GMT'}]
|
2009-10-28
|
[array(['Casalbuoni', 'R.', ''], dtype=object)
array(['Chiappetta', 'P.', ''], dtype=object)
array(['Deandrea', 'A.', ''], dtype=object)
array(['De Curtis', 'S.', ''], dtype=object)
array(['Dominici', 'D.', ''], dtype=object)
array(['Gatto', 'R.', ''], dtype=object)]
|
7,186 |
1407.1004
|
Despina Stasi
|
Despina Stasi and Kayvan Sadeghi and Alessandro Rinaldo and Sonja
Petrovi\'c and Stephen E. Fienberg
|
$\beta$ models for random hypergraphs with a given degree sequence
|
9 pages, 2 figures, Proceedings of 21st International Conference on
Computational Statistics (2014), to appear
| null | null | null |
math.ST cs.SI stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce the beta model for random hypergraphs in order to represent the
occurrence of multi-way interactions among agents in a social network. This
model builds upon and generalizes the well-studied beta model for random
graphs, which instead only considers pairwise interactions. We provide two
algorithms for fitting the model parameters, IPS (iterative proportional
scaling) and fixed point algorithm, prove that both algorithms converge if
maximum likelihood estimator (MLE) exists, and provide algorithmic and
geometric ways of dealing the issue of MLE existence.
|
[{'version': 'v1', 'created': 'Thu, 3 Jul 2014 18:31:56 GMT'}]
|
2014-07-04
|
[array(['Stasi', 'Despina', ''], dtype=object)
array(['Sadeghi', 'Kayvan', ''], dtype=object)
array(['Rinaldo', 'Alessandro', ''], dtype=object)
array(['Petrović', 'Sonja', ''], dtype=object)
array(['Fienberg', 'Stephen E.', ''], dtype=object)]
|
7,187 |
2201.07816
|
Alexander Dittmann
|
Alexander J. Dittmann, Geoffrey Ryan
|
A Survey of Disc Thickness and Viscosity in Circumbinary Accretion:
Binary Evolution, Variability, and Disc Morphology
|
20 pages, 21 figures, published in MNRAS
| null |
10.1093/mnras/stac935
| null |
astro-ph.HE astro-ph.GA astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Much of the parameter space relevant to the evolution of astrophysical
circumbinary accretion discs remains unexplored. We have carried out a suite of
circumbinary disc simulations surveying both disc thickness and kinematic
viscosity, using both constant-$\nu$ and constant-$\alpha$ prescriptions. We
focus primarily on disc aspect ratios between $0.1$ and $0.033$, and on
viscosities between $\nu=0.0005$ and $\nu=0.008$ (in units of binary semi-major
axis and orbital frequency), and specialise to circular equal-mass binaries.
Both factors strongly influence the evolution of the binary semi-major axis: at
$\nu=0.0005,$ inspirals occur at aspect ratios $\lesssim0.059$, while at
$\nu=0.004$ inspirals occur only at aspect ratios $\lesssim0.04$. Inspirals
occur largely because of the increasingly strong negative torque on the binary
by streams of material which lag the binary, with negligible contributions from
resonant torques excited in the circumbinary disc. We find that reductions in
accretion rate occur when simulations are initialised too far from the eventual
quasi-steady state driven by interaction with the binary, rather than being
intrinsically linked to the disc aspect ratio. We find not only that the cavity
size increases as viscosity is decreased, but that thinner circumbinary discs
become more eccentric. Our results suggest that supermassive black hole
binaries should be driven, more rapidly than previous estimates, from
$\sim$parsec separations to distances where gravitational waves drive their
inspiral, potentially reducing the number of binaries observable by pulsar
timing arrays.
|
[{'version': 'v1', 'created': 'Wed, 19 Jan 2022 19:01:41 GMT'}
{'version': 'v2', 'created': 'Mon, 6 Jun 2022 19:32:02 GMT'}]
|
2022-06-08
|
[array(['Dittmann', 'Alexander J.', ''], dtype=object)
array(['Ryan', 'Geoffrey', ''], dtype=object)]
|
7,188 |
1912.03175
|
Luka Sturtewagen
|
Luka Sturtewagen and Erik van der Linden
|
Effect of polydispersity on the phase behavior of non-additive hard
spheres in solution, part II
| null | null | null | null |
cond-mat.stat-mech cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the theoretical phase behavior of an asymmetric binary mixture of
hard spheres, of which the smaller component is monodisperse and the larger
component is polydisperse. The interactions are modeled in terms of the second
virial coefficient and can be additive hard sphere (HS) or non-additive hard
sphere (NAHS) interactions. The polydisperse component is subdivided into two
sub-components and has an average size ten or three times the size of the
monodisperse component. We give the set of equations that defines the phase
diagram for mixtures with more than two components in a solvent. We calculate
the theoretical liquid-liquid phase separation boundary for two phase
separation (the binodal) and three phase separation, the plait point, and the
spinodal. We vary the distribution of the polydisperse component in skewness
and polydispersity, next to that we vary the non-additivity between the
sub-components as well as between the main components. We compare the phase
behavior of the polydisperse mixtures with binary monodisperse mixtures for the
same average size and binary monodisperse mixtures for the same effective
interaction. We find that when the compatibility between the polydisperse
sub-components decreases, three-phase separation becomes possible. The shape
and position of the phase boundary is dependent on the non-additivity between
the subcomponents as well as their size distribution. We conclude that it is
the phase enriched in the polydisperse component that demixes into an
additional phase when the incompatibility between the sub-components increases.
|
[{'version': 'v1', 'created': 'Fri, 6 Dec 2019 15:19:19 GMT'}]
|
2019-12-09
|
[array(['Sturtewagen', 'Luka', ''], dtype=object)
array(['van der Linden', 'Erik', ''], dtype=object)]
|
7,189 |
1811.00927
|
Erez Etzion
|
Cristiano Alpigiani, Austin Ball, Liron Barak, James Beacham, Yan
Benhammo, Tingting Cao, Paolo Camarri, Roberto Cardarelli, Mario
Rodriguez-Cahuantzi, John Paul Chou, David Curtin, Miriam Diamond, Giuseppe
Di Sciascio, Marco Drewes, Sarah C. Eno, Erez Etzion, Rouven Essig, Jared
Evans, Oliver Fischer, Stefano Giagu, Brandon Gomes, Andy Haas, Yuekun Heng,
Giuseppe Iaselli, Ken Johns, Muge Karagoz, Luke Kasper, Audrey Kvam,
Dragoslav Lazic, Liang Li, Barbara Liberti, Zhen Liu, Henry Lubatti, Giovanni
Marsella, Matthew McCullough, David McKeen, Patrick Meade, Gilad Mizrachi,
David Morrissey, Meny Raviv Moshe, Karen Salome Caballero-Mora, Piter A. Paye
Mamani, Antonio Policicchio, Mason Proffitt, Marina Reggiani-Guzzo, Joe
Rothberg, Rinaldo Santonico, Marco Schioppa, Jessie Shelton, Brian Shuve,
Martin A. Subieta Vasquez, Daniel Stolarski, Albert de Roeck, Arturo
Fernandez Tellez, Guillermo Tejeda Munoz, Mario Ivan Martinez Hernandez,
Yiftah Silver, Steffie Ann Thayil, Emma Torro, Yuhsin Tsai, Juan Carlos
Arteaga-Velazquez, Gordon Watts, Charles Young, Jose Zurita
|
A Letter of Intent for MATHUSLA: a dedicated displaced vertex detector
above ATLAS or CMS
| null | null | null |
CERN-LHCC-2018-025, LHCC-I-031
|
physics.ins-det hep-ex
|
http://creativecommons.org/licenses/by/4.0/
|
In this Letter of Intent (LOI) we propose the construction of MATHUSLA
(MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles), a dedicated
large-volume displaced vertex detector for the HL-LHC on the surface above
ATLAS or CMS. Such a detector, which can be built using existing technologies
with a reasonable budget in time for the HL-LHC upgrade, could search for
neutral long-lived particles (LLPs) with up to several orders of magnitude
better sensitivity than ATLAS or CMS, while also acting as a cutting-edge
cosmic ray telescope at CERN to explore many open questions in cosmic ray and
astro-particle physics. We review the physics motivations for MATHUSLA and
summarize its LLP reach for several different possible detector geometries, as
well as outline the cosmic ray physics program. We present several updated
background studies for MATHUSLA, which help inform a first detector-design
concept utilizing modular construction with Resistive Plate Chambers (RPCs) as
the primary tracking technology. We present first efficiency and reconstruction
studies to verify the viability of this design concept, and we explore some
aspects of its total cost. We end with a summary of recent progress made on the
MATHUSLA test stand, a small-scale demonstrator experiment currently taking
data at CERN Point 1, and finish with a short comment on future work.
|
[{'version': 'v1', 'created': 'Fri, 2 Nov 2018 15:16:39 GMT'}]
|
2018-11-05
|
[array(['Alpigiani', 'Cristiano', ''], dtype=object)
array(['Ball', 'Austin', ''], dtype=object)
array(['Barak', 'Liron', ''], dtype=object)
array(['Beacham', 'James', ''], dtype=object)
array(['Benhammo', 'Yan', ''], dtype=object)
array(['Cao', 'Tingting', ''], dtype=object)
array(['Camarri', 'Paolo', ''], dtype=object)
array(['Cardarelli', 'Roberto', ''], dtype=object)
array(['Rodriguez-Cahuantzi', 'Mario', ''], dtype=object)
array(['Chou', 'John Paul', ''], dtype=object)
array(['Curtin', 'David', ''], dtype=object)
array(['Diamond', 'Miriam', ''], dtype=object)
array(['Di Sciascio', 'Giuseppe', ''], dtype=object)
array(['Drewes', 'Marco', ''], dtype=object)
array(['Eno', 'Sarah C.', ''], dtype=object)
array(['Etzion', 'Erez', ''], dtype=object)
array(['Essig', 'Rouven', ''], dtype=object)
array(['Evans', 'Jared', ''], dtype=object)
array(['Fischer', 'Oliver', ''], dtype=object)
array(['Giagu', 'Stefano', ''], dtype=object)
array(['Gomes', 'Brandon', ''], dtype=object)
array(['Haas', 'Andy', ''], dtype=object)
array(['Heng', 'Yuekun', ''], dtype=object)
array(['Iaselli', 'Giuseppe', ''], dtype=object)
array(['Johns', 'Ken', ''], dtype=object)
array(['Karagoz', 'Muge', ''], dtype=object)
array(['Kasper', 'Luke', ''], dtype=object)
array(['Kvam', 'Audrey', ''], dtype=object)
array(['Lazic', 'Dragoslav', ''], dtype=object)
array(['Li', 'Liang', ''], dtype=object)
array(['Liberti', 'Barbara', ''], dtype=object)
array(['Liu', 'Zhen', ''], dtype=object)
array(['Lubatti', 'Henry', ''], dtype=object)
array(['Marsella', 'Giovanni', ''], dtype=object)
array(['McCullough', 'Matthew', ''], dtype=object)
array(['McKeen', 'David', ''], dtype=object)
array(['Meade', 'Patrick', ''], dtype=object)
array(['Mizrachi', 'Gilad', ''], dtype=object)
array(['Morrissey', 'David', ''], dtype=object)
array(['Moshe', 'Meny Raviv', ''], dtype=object)
array(['Caballero-Mora', 'Karen Salome', ''], dtype=object)
array(['Mamani', 'Piter A. Paye', ''], dtype=object)
array(['Policicchio', 'Antonio', ''], dtype=object)
array(['Proffitt', 'Mason', ''], dtype=object)
array(['Reggiani-Guzzo', 'Marina', ''], dtype=object)
array(['Rothberg', 'Joe', ''], dtype=object)
array(['Santonico', 'Rinaldo', ''], dtype=object)
array(['Schioppa', 'Marco', ''], dtype=object)
array(['Shelton', 'Jessie', ''], dtype=object)
array(['Shuve', 'Brian', ''], dtype=object)
array(['Vasquez', 'Martin A. Subieta', ''], dtype=object)
array(['Stolarski', 'Daniel', ''], dtype=object)
array(['de Roeck', 'Albert', ''], dtype=object)
array(['Tellez', 'Arturo Fernandez', ''], dtype=object)
array(['Munoz', 'Guillermo Tejeda', ''], dtype=object)
array(['Hernandez', 'Mario Ivan Martinez', ''], dtype=object)
array(['Silver', 'Yiftah', ''], dtype=object)
array(['Thayil', 'Steffie Ann', ''], dtype=object)
array(['Torro', 'Emma', ''], dtype=object)
array(['Tsai', 'Yuhsin', ''], dtype=object)
array(['Arteaga-Velazquez', 'Juan Carlos', ''], dtype=object)
array(['Watts', 'Gordon', ''], dtype=object)
array(['Young', 'Charles', ''], dtype=object)
array(['Zurita', 'Jose', ''], dtype=object)]
|
7,190 |
1003.0939
|
Jounghun Lee
|
Jounghun Lee (Seoul Nat'l U.), Eiichiro Komatsu (U.Texas at Austin)
|
Bullet Cluster: A Challenge to LCDM Cosmology
|
accepted for publication in ApJ, light-cone effect discussed, minor
typos corrected, 22 pages, 6 figures, 3 tables
|
Astrophysical Journal 718 (2010) 60-65
|
10.1088/0004-637X/718/1/60
|
TCC-009-10
|
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
To quantify how rare the bullet-cluster-like high-velocity merging systems
are in the standard LCDM cosmology, we use a large-volume 27 (Gpc/h)^3 MICE
simulation to calculate the distribution of infall velocities of subclusters
around massive main clusters. The infall-velocity distribution is given at
(1-3)R_{200} of the main cluster (where R_{200} is similar to the virial
radius), and thus it gives the distribution of realistic initial velocities of
subclusters just before collision. These velocities can be compared with the
initial velocities used by the non-cosmological hydrodynamical simulations of
1E0657-56 in the literature. The latest parameter search carried out recently
by Mastropietro and Burkert showed that the initial velocity of 3000 km/s at
about 2R_{200} is required to explain the observed shock velocity, X-ray
brightness ratio of the main and subcluster, and displacement of the X-ray
peaks from the mass peaks. We show that such a high infall velocity at 2R_{200}
is incompatible with the prediction of a LCDM model: the probability of finding
3000 km/s in (2-3)R_{200} is between 3.3X10^{-11} and 3.6X10^{-9}. It is
concluded that the existence of 1E0657-56 is incompatible with the prediction
of a LCDM model, unless a lower infall velocity solution for 1E0657-56 with <
1800 km/s at 2R_{200} is found.
|
[{'version': 'v1', 'created': 'Thu, 4 Mar 2010 02:02:16 GMT'}
{'version': 'v2', 'created': 'Sat, 22 May 2010 02:40:10 GMT'}]
|
2015-05-18
|
[array(['Lee', 'Jounghun', '', "Seoul Nat'l U."], dtype=object)
array(['Komatsu', 'Eiichiro', '', 'U.Texas at Austin'], dtype=object)]
|
7,191 |
hep-ph/0409309
|
Thomas G. Rizzo
|
Thomas G. Rizzo
|
Pedagogical Introduction to Extra Dimensions
|
20 pages, 9 figs.; write-up of a lecture given at the 2004 SLAC
Summer Institute; typos fixed and refs added
| null | null |
SLAC-PUB-10753
|
hep-ph
| null |
Extra dimensions provide a new window on a number of problems faced by the
Standard Model. The following provides an introduction to this very broad
subject aimed at experimental graduate students and post-docs based on a
lecture given at the 2004 SLAC Summer Institute.
|
[{'version': 'v1', 'created': 'Mon, 27 Sep 2004 16:21:44 GMT'}
{'version': 'v2', 'created': 'Tue, 5 Oct 2004 20:15:12 GMT'}]
|
2007-05-23
|
[array(['Rizzo', 'Thomas G.', ''], dtype=object)]
|
7,192 |
2306.02048
|
Somnath Bhowmick
|
Achintya Priydarshi, Abhinav Arora, Yogesh Singh Chauhan, Amit
Agarwal, and Somnath Bhowmick
|
Versatility of type-II van der Waals heterostructures: a case study with
SiH-CdCl2
| null | null | null | null |
cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
Unlike bilayers or a few layers thick materials, heterostructures are
designer materials formed by assembling different monolayers in any desired
sequence. As a result, while multilayer materials come with their intrinsic
properties, heterostructures can be tailor-made to suit specific applications.
Taking SiH-CdCl 2 as a representative system, we show the potential of
heterostructures for several applications, like piezoelectricity,
photocatalytic water splitting, and tunnel field effect transistor (TFET). Our
study confirms that the characteristics of the heterostructure mainly depend on
the potential difference between the constituent monolayers. From the vast
database of available layered materials, many such combinations with a suitable
potential difference are expected to have similar properties. Our work points
to a vast pool of assembled materials with multifunctionality, an excellent
asset for next-generation device applications.
|
[{'version': 'v1', 'created': 'Sat, 3 Jun 2023 08:22:29 GMT'}]
|
2023-06-06
|
[array(['Priydarshi', 'Achintya', ''], dtype=object)
array(['Arora', 'Abhinav', ''], dtype=object)
array(['Chauhan', 'Yogesh Singh', ''], dtype=object)
array(['Agarwal', 'Amit', ''], dtype=object)
array(['Bhowmick', 'Somnath', ''], dtype=object)]
|
7,193 |
1602.06562
|
Vasily Temnov V.
|
Vasily V. Temnov, Ilya Razdolski, Thomas Pezeril, Denys Makarov, Denis
Seletskiy, Alexey Melnikov, Keith A. Nelson
|
Nonlinear acousto-magneto-plasmonics
|
30 pages, 12 figures, to be published as a Topical Review in the
Journal of Optics
|
Journal of Optics 18, 093002 (2016)
|
10.1088/2040-8978/18/9/093002
| null |
cond-mat.mes-hall physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We review the recent progress in experimental and theoretical research of
interactions between the acoustic, magnetic and plasmonic transients in hybrid
metal-ferromagnet multilayer structures excited by ultrashort laser pulses. The
main focus is on understanding the nonlinear aspects of the acoustic dynamics
in materials as well as the peculiarities in the nonlinear optical and
magneto-optical response. For example, the nonlinear optical detection is
illustrated in details by probing the static magneto-optical second harmonic
generation in gold-cobalt-silver trilayer structures in Kretschmann geometry.
Furthermore, we show experimentally how the nonlinear reshaping of giant
ultrashort acoustic pulses propagating in gold can be quantified by
time-resolved plasmonic interferometry and how these ultrashort optical pulses
dynamically modulate the optical nonlinearities. The effective medium
approximation for the optical properties of hybrid multilayers facilitates the
understanding of novel optical detection techniques. In the discussion we
highlight recent works on the nonlinear magneto-elastic interactions, and
strain-induced effects in semiconductor quantum dots.
|
[{'version': 'v1', 'created': 'Sun, 21 Feb 2016 18:22:58 GMT'}]
|
2016-10-27
|
[array(['Temnov', 'Vasily V.', ''], dtype=object)
array(['Razdolski', 'Ilya', ''], dtype=object)
array(['Pezeril', 'Thomas', ''], dtype=object)
array(['Makarov', 'Denys', ''], dtype=object)
array(['Seletskiy', 'Denis', ''], dtype=object)
array(['Melnikov', 'Alexey', ''], dtype=object)
array(['Nelson', 'Keith A.', ''], dtype=object)]
|
7,194 |
1808.01324
|
Christoph Englert
|
Sally Dawson, Christoph Englert, Tilman Plehn
|
Higgs Physics: It ain't over till it's over
|
102 pages, 64 figures, invited review for Physics Reports, v2: typos
corrected, references added, v3: published version
| null |
10.1016/j.physrep.2019.05.001
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We review the theoretical underpinning of the Higgs mechanism of electroweak
symmetry breaking and the experimental status of Higgs measurements from a
pedagogical perspective. The possibilities and motivations for new physics in
the symmetry breaking sector are discussed along with current measurements. A
focus is on the implications of measurements in the Higgs sector for
theoretical insights into extensions of the Standard Model. We also discuss of
future prospects for Higgs physics and new analysis techniques.
|
[{'version': 'v1', 'created': 'Fri, 3 Aug 2018 19:42:14 GMT'}
{'version': 'v2', 'created': 'Mon, 10 Sep 2018 20:07:39 GMT'}
{'version': 'v3', 'created': 'Wed, 5 Jun 2019 14:35:30 GMT'}]
|
2019-07-24
|
[array(['Dawson', 'Sally', ''], dtype=object)
array(['Englert', 'Christoph', ''], dtype=object)
array(['Plehn', 'Tilman', ''], dtype=object)]
|
7,195 |
1802.09308
|
Tianyu Pang
|
Tianyu Pang, Chao Du, Jun Zhu
|
Max-Mahalanobis Linear Discriminant Analysis Networks
| null | null | null | null |
cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A deep neural network (DNN) consists of a nonlinear transformation from an
input to a feature representation, followed by a common softmax linear
classifier. Though many efforts have been devoted to designing a proper
architecture for nonlinear transformation, little investigation has been done
on the classifier part. In this paper, we show that a properly designed
classifier can improve robustness to adversarial attacks and lead to better
prediction results. Specifically, we define a Max-Mahalanobis distribution
(MMD) and theoretically show that if the input distributes as a MMD, the linear
discriminant analysis (LDA) classifier will have the best robustness to
adversarial examples. We further propose a novel Max-Mahalanobis linear
discriminant analysis (MM-LDA) network, which explicitly maps a complicated
data distribution in the input space to a MMD in the latent feature space and
then applies LDA to make predictions. Our results demonstrate that the MM-LDA
networks are significantly more robust to adversarial attacks, and have better
performance in class-biased classification.
|
[{'version': 'v1', 'created': 'Mon, 26 Feb 2018 14:07:18 GMT'}
{'version': 'v2', 'created': 'Tue, 19 Jun 2018 07:33:57 GMT'}]
|
2018-06-20
|
[array(['Pang', 'Tianyu', ''], dtype=object)
array(['Du', 'Chao', ''], dtype=object)
array(['Zhu', 'Jun', ''], dtype=object)]
|
7,196 |
2010.09732
|
Samuel Crew
|
Samuel Crew, Nick Dorey, Daniel Zhang
|
Blocks and Vortices in the 3d ADHM Quiver Gauge Theory
|
32+26 pages, 6 figures. v2: Discussion of Neumann boundary conditions
clarified, JHEP version
| null |
10.1007/JHEP03(2021)234
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the hemisphere partition function of a three-dimensional
$\mathcal{N}=4$ supersymmetric $U(N)$ gauge theory with one adjoint and one
fundamental hypermultiplet -- the ADHM quiver theory. In particular, we propose
a distinguished set of UV boundary conditions which yield Verma modules of the
quantised chiral rings of the Higgs and Coulomb branches. In line with a recent
proposal by two of the authors in collaboration with M. Bullimore, we show
explicitly that the hemisphere partition functions recover the characters of
these modules in two limits, and realise blocks gluing exactly to the partition
functions of the theory on closed three-manifolds. We study the geometry of the
vortex moduli space and investigate the interpretation of the vortex partition
functions as equivariant indices of quasimaps to the Hilbert scheme of points
in $\mathbb{C}^2$. We also investigate half indices of the ADHM quiver gauge
theory in the presence of a line operator and discuss their geometric
interpretation. Along the way we find interesting relations between our
hemisphere blocks and related quantities in topological string theory and
equivariant quantum K-theory.
|
[{'version': 'v1', 'created': 'Mon, 19 Oct 2020 18:00:02 GMT'}
{'version': 'v2', 'created': 'Tue, 23 Mar 2021 22:36:37 GMT'}]
|
2021-04-07
|
[array(['Crew', 'Samuel', ''], dtype=object)
array(['Dorey', 'Nick', ''], dtype=object)
array(['Zhang', 'Daniel', ''], dtype=object)]
|
7,197 |
1904.03549
|
Jie Gui
|
Jie Gui, Tongliang Liu, Zhenan Sun, Dacheng Tao, and Tieniu Tan
|
Supervised Discrete Hashing with Relaxation
| null | null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Data-dependent hashing has recently attracted attention due to being able to
support efficient retrieval and storage of high-dimensional data such as
documents, images, and videos. In this paper, we propose a novel learning-based
hashing method called "Supervised Discrete Hashing with Relaxation" (SDHR)
based on "Supervised Discrete Hashing" (SDH). SDH uses ordinary least squares
regression and traditional zero-one matrix encoding of class label information
as the regression target (code words), thus fixing the regression target. In
SDHR, the regression target is instead optimized. The optimized regression
target matrix satisfies a large margin constraint for correct classification of
each example. Compared with SDH, which uses the traditional zero-one matrix,
SDHR utilizes the learned regression target matrix and, therefore, more
accurately measures the classification error of the regression model and is
more flexible. As expected, SDHR generally outperforms SDH. Experimental
results on two large-scale image datasets (CIFAR-10 and MNIST) and a
large-scale and challenging face dataset (FRGC) demonstrate the effectiveness
and efficiency of SDHR.
|
[{'version': 'v1', 'created': 'Sun, 7 Apr 2019 00:09:19 GMT'}]
|
2019-04-09
|
[array(['Gui', 'Jie', ''], dtype=object)
array(['Liu', 'Tongliang', ''], dtype=object)
array(['Sun', 'Zhenan', ''], dtype=object)
array(['Tao', 'Dacheng', ''], dtype=object)
array(['Tan', 'Tieniu', ''], dtype=object)]
|
7,198 |
1703.07960
|
Hector Garcia de Marina Dr.
|
Hector Garcia de Marina and Bayu Jayawardhana and Ming Cao
|
Distributed algorithm for controlling scale-free polygonal formations
|
6 pages. Accepted in the 2007 IFAC World Congress
| null | null | null |
cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper presents a distributed algorithm for controlling the deployment of
a team of mobile agents in formations whose shapes can be characterized by a
broad class of polygons, including regular ones, where each agent occupies a
corner of the polygon. The algorithm shares the appealing properties of the
popular distance-based rigid formation control, but with the additional
advantage of requiring the control of fewer pairs of neighboring agents.
Furthermore, the scale of the polygon can be controlled by only one pair of
neighboring agents. We also exploit the exponential stability of the controlled
formation in order to steer the formation as a whole with translations and
rotations in a prescribed way. We provide both theoretical analysis and
illustrative simulations.
|
[{'version': 'v1', 'created': 'Thu, 23 Mar 2017 08:10:17 GMT'}]
|
2017-03-24
|
[array(['de Marina', 'Hector Garcia', ''], dtype=object)
array(['Jayawardhana', 'Bayu', ''], dtype=object)
array(['Cao', 'Ming', ''], dtype=object)]
|
7,199 |
1703.01643
|
Ji Zhou Mr.
|
Ji Zhou, Yaojun Qiao, Tiantian Zhang, Jinlong Wei, Qixiang Cheng, Qi
Wang, Zhanyu Yang, Aiying Yang, and Yueming Lu
|
Faster-than-Nyquist Non-Orthogonal Frequency-Division Multiplexing for
Visible Light Communications
|
Under review of Journal of Lightwave Technology
| null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we propose a faster-than-Nyquist (FTN) non-orthogonal
frequency-division multiplexing (NOFDM) scheme for visible light communications
(VLC) where the multiplexing/demultiplexing employs the inverse fractional
cosine transform (IFrCT)/FrCT. Different to the common fractional Fourier
transform-based NOFDM (FrFT-NOFDM) signal, FrCT-based NOFDM (FrCT-NOFDM) signal
is real-valued which can be directly applied to the VLC systems without the
expensive upconversion. Thus, FrCT-NOFDM is more suitable for the
cost-sensitive VLC systems. Meanwhile, under the same transmission rate,
FrCT-NOFDM signal occupies smaller bandwidth compared to OFDM signal. When the
bandwidth compression factor $\alpha$ is set to $0.8$, $20\%$ bandwidth saving
can be obtained. Therefore, FrCT-NOFDM has higher spectral efficiency and
suffers less high-frequency distortion compared to OFDM, which benefits the
bandwidth-limited VLC systems. As the simulation results show, bit error rate
(BER) performance of FrCT-NOFDM with $\alpha$ of $0.9$ or $0.8$ is better than
that of OFDM. Moreover, FrCT-NOFDM has a superior security performance. In
conclusion, FrCT-NOFDM shows great potential for application in the future VLC
systems.
|
[{'version': 'v1', 'created': 'Sun, 5 Mar 2017 18:52:52 GMT'}
{'version': 'v2', 'created': 'Tue, 27 Jun 2017 14:57:25 GMT'}]
|
2017-06-28
|
[array(['Zhou', 'Ji', ''], dtype=object)
array(['Qiao', 'Yaojun', ''], dtype=object)
array(['Zhang', 'Tiantian', ''], dtype=object)
array(['Wei', 'Jinlong', ''], dtype=object)
array(['Cheng', 'Qixiang', ''], dtype=object)
array(['Wang', 'Qi', ''], dtype=object)
array(['Yang', 'Zhanyu', ''], dtype=object)
array(['Yang', 'Aiying', ''], dtype=object)
array(['Lu', 'Yueming', ''], dtype=object)]
|
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