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44.4k
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4,100 |
hep-ph/0102195
|
Thorsten Ohl
|
Mauro Moretti (Univ. di Ferrara & INFN Ferrara), Thorsten Ohl, Juergen
Reuter (TU Darmstadt)
|
O'Mega: An Optimizing Matrix Element Generator
|
29 pages, LaTeX
| null | null |
IKDA 2001/06, LC-TOOL-2001-040
|
hep-ph
| null |
We sketch the architecture of O'Mega, a new optimizing compiler for tree
amplitudes in quantum field theory, and briefly describe its usage. O'Mega
generates the most efficient code currently available for scattering amplitudes
for many polarized particles in the Standard Model and its extensions.
|
[{'version': 'v1', 'created': 'Thu, 15 Feb 2001 17:09:04 GMT'}]
|
2007-05-23
|
[array(['Moretti', 'Mauro', '', 'Univ. di Ferrara & INFN Ferrara'],
dtype=object)
array(['Ohl', 'Thorsten', '', 'TU Darmstadt'], dtype=object)
array(['Reuter', 'Juergen', '', 'TU Darmstadt'], dtype=object)]
|
4,101 |
hep-ph/0101260
|
Wolfgang Hollik
|
A. Freitas, S. Heinemeyer, W. Hollik, W. Walter, G. Weiglein
|
Two-loop electroweak contributions to $\Delta r$
|
14 pages, including 4 figures. Presented at the 5th International
Symposium on Radiative Corrections, (RADCOR-2000), Carmel CA, USA, 11-15
September 2000
| null | null | null |
hep-ph
| null |
A review is given on the quantum correction $\Delta r$ in the $W$--$Z$ mass
correlation at the electroweak two-loop level, as derived from the calculation
of the muon lifetime in the Standard Model. Exact results for $\Delta r$ and
the $W$-mass prediction including ${\mathcal{O}}(\alpha^2)$ corrections with
fermion loops are presented and compared with previous results of a
next-to-leading order expansion in the top-quark mass.
|
[{'version': 'v1', 'created': 'Tue, 23 Jan 2001 13:53:23 GMT'}]
|
2007-05-23
|
[array(['Freitas', 'A.', ''], dtype=object)
array(['Heinemeyer', 'S.', ''], dtype=object)
array(['Hollik', 'W.', ''], dtype=object)
array(['Walter', 'W.', ''], dtype=object)
array(['Weiglein', 'G.', ''], dtype=object)]
|
4,102 |
physics/9910023
|
JUNGMANN Klaus
|
Klaus Jungmann (University of Heidelberg)
|
Muonium Spectroscopy
| null |
Hyperfine Interact.127:189-196,2000
|
10.1023/A:1012639500419
| null |
physics.atom-ph
| null |
The electromagnetic interactions of electrons and muons can be described to
very high accuracy within the framework of standard theory, in particular
within the hydrogen-like muonium atom. Therefore precision measurements allow
to test basic interactions in physics and to search for yet unknown forces.
Accurate values for fundamental constants can be obtained. Results from
experiments on the ground state hyperfine structure and the 1s-2s intervals in
muonium are described together with their relations to a new measurement of the
muon magnetic anomaly.
|
[{'version': 'v1', 'created': 'Sun, 17 Oct 1999 09:29:10 GMT'}]
|
2016-09-08
|
[array(['Jungmann', 'Klaus', '', 'University of Heidelberg'], dtype=object)]
|
4,103 |
1810.12945
|
Erez Berg
|
Connie H. Mousatov, Erez Berg, Sean A. Hartnoll
|
Theory of the Strange Metal Sr$_3$Ru$_2$O$_7$
|
Revised, published version
|
PNAS 117 (6), 2852 (2020)
|
10.1073/pnas.1915224117
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The bilayer perovskite Sr$_3$Ru$_2$O$_7$ has been widely studied as a
canonical strange metal. It exhibits $T$-linear resistivity and a $T\log(1/T)$
electronic specific heat in a field-tuned quantum critical fan. Criticality is
known to occur in `hot' Fermi pockets with a high density of states close to
the Fermi energy. We show that while these hot pockets occupy a small fraction
of the Brillouin zone, they are responsible for the anomalous transport and
thermodynamics of the material. Specifically, a scattering process in which two
electrons from the large, `cold' Fermi surfaces scatter into one hot and one
cold electron renders the ostensibly non-critical cold fermions a marginal
Fermi liquid. From this fact the transport and thermodynamic phase diagram is
reproduced in detail. Finally, we show that the same scattering mechanism into
hot electrons that are instead localized near a two-dimensional van Hove
singularity explains the anomalous transport observed in strained
Sr$_2$RuO$_4$.
|
[{'version': 'v1', 'created': 'Tue, 30 Oct 2018 18:09:30 GMT'}
{'version': 'v2', 'created': 'Sun, 12 Apr 2020 22:08:47 GMT'}]
|
2020-04-14
|
[array(['Mousatov', 'Connie H.', ''], dtype=object)
array(['Berg', 'Erez', ''], dtype=object)
array(['Hartnoll', 'Sean A.', ''], dtype=object)]
|
4,104 |
2203.12312
|
Mohammed M. Alenazi
|
Mohammed M. Alenazi, Barzan A. Yosuf, Sanaa H. Mohamed, Taisir E. H.
El-Gorashi, and Jaafar M. H. Elmirghani
|
Energy Efficient Placement of ML-Based Services in IoT Networks
| null | null | null | null |
eess.SY cs.SY
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
The Internet of Things (IoT) is gaining momentum in its quest to bridge the
gap between the physical and the digital world. The main goal of the IoT is the
creation of smart environments and self-aware things that help to facilitate a
variety of services such as smart transport, climate monitoring, e-health, etc.
Huge volumes of data are expected to be collected by the connected
sensors/things, which in traditional cases are processed centrally by large
data centers in the core network that will inevitably lead to excessive
transportation power consumption as well as added latency overheads. Instead,
fog computing has been proposed by researchers from industry and academia to
extend the capability of the cloud right to the point where the data is
collected at the sensing layer. This way, primitive tasks that can be hosted in
IoT sensors do not need to be sent all the way to the cloud for processing. In
this paper we propose energy efficient embedding of machine learning (ML)
models over a cloud-fog network using a Mixed Integer Linear Programming (MILP)
optimization model. We exploit virtualization in our framework to provide
service abstraction of Deep Neural Networks (DNN) layers that can be composed
into a set of VMs interconnected by virtual links. We constrain the number of
VMs that can be processed at the IoT layer and study the impact on the
performance of the cloud fog approach.
|
[{'version': 'v1', 'created': 'Wed, 23 Mar 2022 10:24:34 GMT'}]
|
2022-03-24
|
[array(['Alenazi', 'Mohammed M.', ''], dtype=object)
array(['Yosuf', 'Barzan A.', ''], dtype=object)
array(['Mohamed', 'Sanaa H.', ''], dtype=object)
array(['El-Gorashi', 'Taisir E. H.', ''], dtype=object)
array(['Elmirghani', 'Jaafar M. H.', ''], dtype=object)]
|
4,105 |
2210.00533
|
Rony Bou Rouphael
|
Rony Bou Rouphael and Ma\"el Le trust
|
Strategic Communication via Cascade Multiple Description Network
| null | null | null | null |
cs.IT math.IT
|
http://creativecommons.org/licenses/by/4.0/
|
In decentralized decision-making problems, agents choose their actions based
on locally available information and knowledge about decision rules or
strategies of other agents. We consider a three-node cascade network with an
encoder, a relay and a decoder, having distinct objectives captured by cost
functions. In such a cascade network, agents choose their respective strategies
sequentially, as a response to the former agent's strategy and in a way to
influence the decision of the latter agent in the network. We assume the
encoder commits to a strategy before the communication takes place. Upon
revelation of the encoding strategy, the relay commits to a strategy and
reveals it. The communication starts, the source sequence is drawn and
processed by the encoder and relay. Then, the decoder observes a sequences of
symbols, updates its Bayesian posterior beliefs accordingly, and takes the
optimal action. This is an extension of the Bayesian persuasion problem in the
Game Theory literature. In this work, we provide an information-theoretic
approach to study the fundamental limit of the strategic communication via
three-node cascade network. Our goal is to characterize the optimal strategies
of the encoder, the relay and the decoder, and study the asymptotic behavior of
the encoder's minimal long-run cost function.
|
[{'version': 'v1', 'created': 'Sun, 2 Oct 2022 14:30:23 GMT'}]
|
2022-10-04
|
[array(['Rouphael', 'Rony Bou', ''], dtype=object)
array(['trust', 'Maël Le', ''], dtype=object)]
|
4,106 |
1901.05380
|
Vytaut\.e Pilipauskait\.e
|
Vytaut\.e Pilipauskait\.e, Viktor Skorniakov, Donatas Surgailis
|
Joint temporal and contemporaneous aggregation of random-coefficient
AR(1) processes with infinite variance
| null |
Advances in Applied Probability, Volume 52, Issue 1 (2020),
237-265
|
10.1017/apr.2019.59
| null |
math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss joint temporal and contemporaneous aggregation of $N$ independent
copies of random-coefficient AR(1) process driven by i.i.d. innovations in the
domain of normal attraction of an $\alpha$-stable distribution, $0< \alpha \le
2$, as both $N$ and the time scale $n$ tend to infinity, possibly at a
different rate. Assuming that the tail distribution function of the random
autoregressive coefficient regularly varies at the unit root with exponent
$\beta > 0$, we show that, for $\beta < \max (\alpha, 1)$, the joint aggregate
displays a variety of stable and non-stable limit behaviors with stability
index depending on $\alpha$, $\beta$ and the mutual increase rate of $N$ and
$n$. The paper extends the results of Pilipauskait\.e and Surgailis (2014) from
$\alpha = 2$ to $0 < \alpha < 2$.
|
[{'version': 'v1', 'created': 'Wed, 16 Jan 2019 16:45:10 GMT'}
{'version': 'v2', 'created': 'Fri, 8 Nov 2019 19:20:31 GMT'}]
|
2020-05-01
|
[array(['Pilipauskaitė', 'Vytautė', ''], dtype=object)
array(['Skorniakov', 'Viktor', ''], dtype=object)
array(['Surgailis', 'Donatas', ''], dtype=object)]
|
4,107 |
1703.00762
|
Laura Magrini
|
L. Magrini, S. Randich, G. Kordopatis, N. Prantzos, D. Romano, A.
Chieffi, M. Limongi, P. Francois, E. Pancino, E. Friel, A. Bragaglia, G.
Tautvaisiene, L. Spina, J. Overbeek, T. Cantat-Gaudin, P. Donati, A.
Vallenari, R. Sordo, F. M. Jimenez-Esteban, B. Tang, A. Drazdauskas, S.
Sousa, S. Duffau, P. Jofre, G. Gilmore, S. Feltzing, E. Alfaro, T. Bensby, E.
Flaccomio, S. Koposov, A. Lanzafame, R. Smiljanic, A. Bayo, G. Carraro, A. R.
Casey, M. T. Costado, F. Damiani, E. Franciosini, A. Hourihane, C. Lardo, J.
Lewis, L. Monaco, L. Morbidelli, G. Sacco, L. Sbordone, C.C. Worley, S.
Zaggia
|
The Gaia-ESO Survey: radial distribution of abundances in the Galactic
disc from open clusters and young field stars
|
20 pages, 8 figures, 4 table, online tables sent on request
|
A&A 603, A2 (2017)
|
10.1051/0004-6361/201630294
| null |
astro-ph.GA astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The spatial distribution of elemental abundances in the disc of our Galaxy
gives insights both on its assembly process and subsequent evolution, and on
the stellar nucleogenesis of the different elements. Gradients can be traced
using several types of objects as, for instance, (young and old) stars, open
clusters, HII regions, planetary nebulae. We aim at tracing the radial
distributions of abundances of elements produced through different
nucleosynthetic channels -the alpha-elements O, Mg, Si, Ca and Ti, and the
iron-peak elements Fe, Cr, Ni and Sc - by using the Gaia-ESO idr4 results of
open clusters and young field stars. From the UVES spectra of member stars, we
determine the average composition of clusters with ages >0.1 Gyr. We derive
statistical ages and distances of field stars. We trace the abundance gradients
using the cluster and field populations and we compare them with a
chemo-dynamical Galactic evolutionary model. Results. The adopted
chemo-dynamical model, with the new generation of metallicity-dependent stellar
yields for massive stars, is able to reproduce the observed spatial
distributions of abundance ratios, in particular the abundance ratios of [O/Fe]
and [Mg/Fe] in the inner disc (5 kpc<RGC <7 kpc), with their differences, that
were usually poorly explained by chemical evolution models. Often, oxygen and
magnesium are considered as equivalent in tracing alpha-element abundances and
in deducing, e.g., the formation time-scales of different Galactic stellar
populations. In addition, often [alpha/Fe] is computed combining several
alpha-elements. Our results indicate, as expected, a complex and diverse
nucleosynthesis of the various alpha-elements, in particular in the high
metallicity regimes, pointing towards a different origin of these elements and
highlighting the risk of considering them as a single class with common
features.
|
[{'version': 'v1', 'created': 'Thu, 2 Mar 2017 12:37:03 GMT'}]
|
2017-07-05
|
[array(['Magrini', 'L.', ''], dtype=object)
array(['Randich', 'S.', ''], dtype=object)
array(['Kordopatis', 'G.', ''], dtype=object)
array(['Prantzos', 'N.', ''], dtype=object)
array(['Romano', 'D.', ''], dtype=object)
array(['Chieffi', 'A.', ''], dtype=object)
array(['Limongi', 'M.', ''], dtype=object)
array(['Francois', 'P.', ''], dtype=object)
array(['Pancino', 'E.', ''], dtype=object)
array(['Friel', 'E.', ''], dtype=object)
array(['Bragaglia', 'A.', ''], dtype=object)
array(['Tautvaisiene', 'G.', ''], dtype=object)
array(['Spina', 'L.', ''], dtype=object)
array(['Overbeek', 'J.', ''], dtype=object)
array(['Cantat-Gaudin', 'T.', ''], dtype=object)
array(['Donati', 'P.', ''], dtype=object)
array(['Vallenari', 'A.', ''], dtype=object)
array(['Sordo', 'R.', ''], dtype=object)
array(['Jimenez-Esteban', 'F. M.', ''], dtype=object)
array(['Tang', 'B.', ''], dtype=object)
array(['Drazdauskas', 'A.', ''], dtype=object)
array(['Sousa', 'S.', ''], dtype=object)
array(['Duffau', 'S.', ''], dtype=object)
array(['Jofre', 'P.', ''], dtype=object)
array(['Gilmore', 'G.', ''], dtype=object)
array(['Feltzing', 'S.', ''], dtype=object)
array(['Alfaro', 'E.', ''], dtype=object)
array(['Bensby', 'T.', ''], dtype=object)
array(['Flaccomio', 'E.', ''], dtype=object)
array(['Koposov', 'S.', ''], dtype=object)
array(['Lanzafame', 'A.', ''], dtype=object)
array(['Smiljanic', 'R.', ''], dtype=object)
array(['Bayo', 'A.', ''], dtype=object)
array(['Carraro', 'G.', ''], dtype=object)
array(['Casey', 'A. R.', ''], dtype=object)
array(['Costado', 'M. T.', ''], dtype=object)
array(['Damiani', 'F.', ''], dtype=object)
array(['Franciosini', 'E.', ''], dtype=object)
array(['Hourihane', 'A.', ''], dtype=object)
array(['Lardo', 'C.', ''], dtype=object)
array(['Lewis', 'J.', ''], dtype=object)
array(['Monaco', 'L.', ''], dtype=object)
array(['Morbidelli', 'L.', ''], dtype=object)
array(['Sacco', 'G.', ''], dtype=object)
array(['Sbordone', 'L.', ''], dtype=object)
array(['Worley', 'C. C.', ''], dtype=object)
array(['Zaggia', 'S.', ''], dtype=object)]
|
4,108 |
2002.06971
|
Ko-Ju Chuang
|
K.-J. Chuang, G. Fedoseev, D. Qasim, S. Ioppolo, C. J\"ager, Th.
Henning, M. E. Palumbo, E.F. van Dishoeck, H. Linnartz
|
Formation of complex molecules in translucent clouds: Acetaldehyde,
vinyl alcohol, ketene, and ethanol via nonenergetic processing of C2H2 ice
|
17 pages, 12 figures, 2 tables
|
A&A 635, A199 (2020)
|
10.1051/0004-6361/201937302
| null |
astro-ph.SR astro-ph.EP astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Complex organic molecules (COMs) have been identified toward high- and
low-mass protostars as well as molecular clouds, suggesting that these
interstellar species originate from the early stage(s) of starformation. The
reaction pathways resulting in COMs described by the formula C$_2$H$_\text{n}$O
are still under debate. In this work, we investigate the laboratory possible
solid-state reactions that involve simple hydrocarbons and OH-radicals along
with H$_2$O ice under translucent cloud conditions (1$\leq$A$_V$$\leq$5 and
\textit{n}$_\text{H}$$\sim$10$^3$ cm$^{-3}$). We focus on the interactions of
C$_2$H$_2$ with H-atoms and OH-radicals, which are produced along the H$_2$O
formation sequence on grain surfaces at 10 K. Ultra-high vacuum (UHV)
experiments were performed to study the surface chemistry observed during
C$_2$H$_2$ + O$_2$ + H codeposition, where O$_2$ was used for the in-situ
generation of OH-radicals. Reflection absorption infrared spectroscopy (RAIRS)
was applied to in situ monitor the initial and newly formed species. After
that, a temperature-programmed desorption experiment combined with a Quadrupole
mass spectrometer (TPD-QMS) was used as a complementary analytical tool. The
investigated 10 K surface chemistry of C$_2$H$_2$ with H-atoms and OH-radicals
not only results in semi and fully saturated hydrocarbons, such as ethylene
(C$_2$H$_4$) and ethane (C$_2$H$_6$), but it also leads to the formation of
COMs, such as vinyl alcohol, acetaldehyde, ketene, ethanol, and possibly acetic
acid. It is concluded that OH-radical addition reactions to C$_2$H$_2$, acting
as a molecular backbone, followed by isomerization (i.e., keto-enol
tautomerization) via an intermolecular pathway and successive hydrogenation
provides a so far experimentally unreported solid-state route for the formation
of these species without the need of energetic input.
|
[{'version': 'v1', 'created': 'Mon, 17 Feb 2020 14:26:29 GMT'}]
|
2020-04-08
|
[array(['Chuang', 'K. -J.', ''], dtype=object)
array(['Fedoseev', 'G.', ''], dtype=object)
array(['Qasim', 'D.', ''], dtype=object)
array(['Ioppolo', 'S.', ''], dtype=object)
array(['Jäger', 'C.', ''], dtype=object)
array(['Henning', 'Th.', ''], dtype=object)
array(['Palumbo', 'M. E.', ''], dtype=object)
array(['van Dishoeck', 'E. F.', ''], dtype=object)
array(['Linnartz', 'H.', ''], dtype=object)]
|
4,109 |
2303.05152
|
Francois Taiani
|
Timoth\'e Albouy (WIDE), Davide Frey (WIDE), Michel Raynal (WIDE),
Fran\c{c}ois Ta\"iani (WIDE)
|
Good-case Early-Stopping Latency of Synchronous Byzantine Reliable
Broadcast: The Deterministic Case (Extended Version)
| null | null | null | null |
cs.DC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper considers the good-case latency of Byzantine Reliable Broadcast
(BRB), i.e., the time taken by correct processes to deliver a message when the
initial sender is correct. This time plays a crucial role in the performance of
practical distributed systems. Although significant strides have been made in
recent years on this question, progress has mainly focused on either
asynchronous or randomized algorithms. By contrast, the good-case latency of
deterministic synchronous BRB under a majority of Byzantine faults has been
little studied. In particular, it was not known whether a goodcase latency
below the worst-case bound of t + 1 rounds could be obtained. This work answers
this open question positively and proposes a deterministic synchronous
Byzantine reliable broadcast that achieves a good-case latency of max(2, t + 3
-- c) rounds, where t is the upper bound on the number of Byzantine processes
and c the number of effectively correct processes.
|
[{'version': 'v1', 'created': 'Thu, 9 Mar 2023 10:10:27 GMT'}
{'version': 'v2', 'created': 'Fri, 10 Mar 2023 09:19:49 GMT'}]
|
2023-03-13
|
[array(['Albouy', 'Timothé', '', 'WIDE'], dtype=object)
array(['Frey', 'Davide', '', 'WIDE'], dtype=object)
array(['Raynal', 'Michel', '', 'WIDE'], dtype=object)
array(['Taïani', 'François', '', 'WIDE'], dtype=object)]
|
4,110 |
1001.5312
|
Atsuhira Nagano
|
Atsuhira Nagano
|
Period differential equations for families of K3 surfaces derived from
some 3 dimensional reflexive polytopes
|
The results of this paper are contained in "Period differential
equations for the families of K3 surfaces with 2 parameters derived from the
reflexive polytopes "
| null | null | null |
math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study period maps for families of $K3$ surfaces those are given by anti
canonical divisors of toric varieties coming from reflexive polytopes $P_2,
P_4, P_5$ and $P_r$. We obtain systems of period differential equations for
these families. Moreover, in the case $P_4$, we determine the projective
monodromy group of the period map. This group is explicitly related with the
Hilbert modular group for $\mathbb{Q}(\sqrt{5})$.
|
[{'version': 'v1', 'created': 'Fri, 29 Jan 2010 02:18:40 GMT'}
{'version': 'v2', 'created': 'Mon, 15 Feb 2010 04:41:46 GMT'}
{'version': 'v3', 'created': 'Fri, 23 Apr 2010 08:39:42 GMT'}
{'version': 'v4', 'created': 'Wed, 1 Dec 2010 10:56:51 GMT'}
{'version': 'v5', 'created': 'Tue, 29 Mar 2016 13:21:58 GMT'}]
|
2016-03-30
|
[array(['Nagano', 'Atsuhira', ''], dtype=object)]
|
4,111 |
1410.3284
|
Revnivtsev Mikhail
|
M. G. Revnivtsev (Space Research Institute of RAS, Moscow, Russia)
|
Measurements of the Cosmic X-ray Background of the Universe and the MVN
Experiment
|
20 pages, 17 figures, Published in Astronomy Letters
|
Astronomy Letters, 2014, v.40, no.11, 667-690
|
10.1134/S106377371411005X
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The paper describes previous studies of the cosmic X-ray background (CXB) of
the Universe in the energy range 1-100 keV and outline prospects for its
investigation with the help of MVN (Monitor Vsego Neba) experiment. The nature
of the CXB and its use for studying the cosmological evolution of black holes
are briefly discussed. The bulk of the paper is devoted to the methods of CXB
measurements, from the first pioneering rocket and balloon-borne experiments to
the measurements made with latest-generation orbital X-ray observatories.
Particular attention is given to the problems of allowance for the contribution
of background events to the measurements with X-ray and hard X-ray instruments.
|
[{'version': 'v1', 'created': 'Mon, 13 Oct 2014 12:44:04 GMT'}]
|
2015-06-23
|
[array(['Revnivtsev', 'M. G.', '',
'Space Research Institute of RAS, Moscow, Russia'], dtype=object)]
|
4,112 |
1702.03897
|
Benedikt Diemer
|
Benedikt Diemer, Isaac Facio
|
The Fabric of the Universe: Exploring the cosmic web in 3D prints and
woven textiles
|
9 pages, 10 figures. Minor changes to match the version published in
PASP. Updated information about our art and science collaboration can be
found at http://www.fabricoftheuniverse.org/
|
2017 PASP 129, 975
|
10.1088/1538-3873/aa6a46
| null |
physics.pop-ph astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce The Fabric of the Universe, an art and science collaboration
focused on exploring the cosmic web of dark matter with unconventional
techniques and materials. We discuss two of our projects in detail. First, we
describe a pipeline for translating three-dimensional (3D) density structures
from N-body simulations into solid surfaces suitable for 3D printing, and
present prints of a cosmological volume and of the infall region around a
massive cluster halo. In these models, we discover wall-like features that are
invisible in two-dimensional projections. Going beyond the sheer visualization
of simulation data, we undertake an exploration of the cosmic web as a
three-dimensional woven textile. To this end, we develop experimental 3D
weaving techniques to create sphere-like and filamentary shapes and radically
simplify a region of the cosmic web into a set of filaments and halos. We
translate the resulting tree structure into a series of commands that can be
executed by a digital weaving machine, and present a large-scale textile
installation.
|
[{'version': 'v1', 'created': 'Tue, 7 Feb 2017 19:04:54 GMT'}
{'version': 'v2', 'created': 'Wed, 19 Apr 2017 01:18:03 GMT'}]
|
2017-04-26
|
[array(['Diemer', 'Benedikt', ''], dtype=object)
array(['Facio', 'Isaac', ''], dtype=object)]
|
4,113 |
1608.02223
|
George Lusztig
|
G. Lusztig
|
On the generalized Springer correspondence
|
40 pages
| null | null | null |
math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We close a gap in the explicit determination of the generalized Springer
correspondence for a connected reductive group in good characteristic.
|
[{'version': 'v1', 'created': 'Sun, 7 Aug 2016 14:48:56 GMT'}
{'version': 'v2', 'created': 'Fri, 2 Sep 2016 15:57:31 GMT'}]
|
2016-09-05
|
[array(['Lusztig', 'G.', ''], dtype=object)]
|
4,114 |
2202.08107
|
Soumen Dey
|
Soumen Dey and Ashis Kumar Chakraborty
|
Estimating Software Reliability Using Size-biased Modelling
|
14 pages. 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
| null | null | null |
stat.AP
|
http://creativecommons.org/licenses/by/4.0/
|
Software reliability estimation is one of the most active areas of research
in software testing. Since time between failures (TBF) has often been
challenging to record, software testing data are commonly recorded as
test-case-wise in a discrete set up. We have developed a Bayesian generalised
linear mixed model (GLMM) based on software testing detection data and a
size-biased strategy which not only estimates the software reliability, but
also estimates the total number of bugs present in the software. Our approach
provides a flexible, unified modelling framework and can be adopted to various
real-life situations. We have assessed the performance of our model via
simulation study and found that each of the key parameters could be estimated
with a satisfactory level of accuracy. We have also applied our model to two
empirical software testing data sets. While there can be other fields of study
for application of our model (e.g., hydrocarbon exploration), we anticipate
that our novel modelling approach to estimate software reliability could be
very useful for the users and can potentially be a key tool in the field of
software reliability estimation.
|
[{'version': 'v1', 'created': 'Wed, 16 Feb 2022 14:44:46 GMT'}
{'version': 'v2', 'created': 'Sat, 26 Mar 2022 04:24:26 GMT'}
{'version': 'v3', 'created': 'Wed, 20 Apr 2022 12:58:44 GMT'}]
|
2022-04-21
|
[array(['Dey', 'Soumen', ''], dtype=object)
array(['Chakraborty', 'Ashis Kumar', ''], dtype=object)]
|
4,115 |
cond-mat/9610130
|
Vincenzo Fiorentini
|
Vincenzo Fiorentini, Michael Methfessel, and Sabrina Oppo
|
Ab initio core-level shifts in metallic alloys
|
7 pages (mrs/epsf styles included), 2 ps figures
|
MRS Proceedings 408, 495 (1996)
| null | null |
cond-mat.mtrl-sci
| null |
Core-level shifts and core-hole screening effects in alloy formation are
studied ``ab initio'' by constrained-density-functional total-energy
calculations. For our case study, the ordered intermetallic alloy MgAu,
final-state effects are essential to account for the experimental Mg 1s shift,
while they are negligible for Au 4f. We explain the differences in the
screening by analyzing the calculated charge density response to the core hole
perturbation.
|
[{'version': 'v1', 'created': 'Wed, 16 Oct 1996 12:53:43 GMT'}]
|
2008-02-03
|
[array(['Fiorentini', 'Vincenzo', ''], dtype=object)
array(['Methfessel', 'Michael', ''], dtype=object)
array(['Oppo', 'Sabrina', ''], dtype=object)]
|
4,116 |
2302.07249
|
Pablo Arrighi
|
Pablo Arrighi, Am\'elia Durbec, Pierre Guillon
|
Graph subshifts
|
13 pages, 4 figures
| null | null | null |
cs.DM cs.FL math.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a definition of graph subshifts of finite type that can be seen as
extending both the notions of subshifts of finite type from classical symbolic
dynamics and finitely presented groups from combinatorial group theory. These
are sets of graphs that are defined by forbidding finitely many local patterns.
In this paper, we focus on the question whether such local conditions can
enforce a specific support graph, and thus relate the model to classical
symbolic dynamics. We prove that the subshifts that contain only infinite
graphs are either aperiodic, or feature no residual finiteness of their period
group, yielding non-trivial examples as well as two natural undecidability
theorems.
|
[{'version': 'v1', 'created': 'Tue, 14 Feb 2023 18:45:30 GMT'}]
|
2023-02-15
|
[array(['Arrighi', 'Pablo', ''], dtype=object)
array(['Durbec', 'Amélia', ''], dtype=object)
array(['Guillon', 'Pierre', ''], dtype=object)]
|
4,117 |
2105.03012
|
Derek Frydel
|
Derek Frydel
|
Stationary distributions of propelled particles as a system with
quenched disorder
| null |
Phys. Rev. E 103, 052603 2021
|
10.1103/PhysRevE.103.052603
| null |
cond-mat.stat-mech cond-mat.soft
|
http://creativecommons.org/publicdomain/zero/1.0/
|
This article is the exploration of the viewpoint within which propelled
particles in a steady-state are regarded as a system with quenched disorder.
The analogy is exact when the rate of the drift orientation vanishes and the
linear potential, representing the drift, becomes part of an external
potential, resulting in the effective potential $u_{eff}$. The stationary
distribution is then calculated as a disorder-averaged quantity by considering
all contributing drift orientations. To extend this viewpoint to the case when
a drift orientation evolves in time, we reformulate the relevant Fokker-Planck
equation as a self-consistent relation. One interesting aspect of this
formulation is that it is represented in terms of the Boltzmann factor
$e^{-\beta u_{eff}}$. In the case of a run-and-tumble model, the formulation
reveals an effective interaction between particles.
|
[{'version': 'v1', 'created': 'Fri, 7 May 2021 00:16:54 GMT'}]
|
2021-05-10
|
[array(['Frydel', 'Derek', ''], dtype=object)]
|
4,118 |
math/0002175
|
Leonid Ryzhik
|
Alexander Kiselev and Leonid Ryzhik
|
Enhancement of the Traveling Front Speeds in Reaction-Diffusion
Equations with Advection
| null | null |
10.1016/S0294-1449(01)00068-3
| null |
math.AP cond-mat nlin.CD physics.flu-dyn
| null |
We establish rigorous lower bounds on the speed of traveling fronts and on
the bulk burning rate in reaction-diffusion equation with passive advection.
The non-linearity is assumed to be of either KPP or ignition type. We consider
two main classes of flows. Percolating flows, which are characterized by the
presence of long tubes of streamlines mixing hot and cold material, lead to
strong speed-up of burning which is linear in the amplitude of the flow, $U$.
On the other hand the cellular flows, which have closed streamlines, are shown
to produce weaker increase in reaction. For such flows we get a lower bound
which grows as $U^{1/5}$ for a large amplitude of the flow.
|
[{'version': 'v1', 'created': 'Tue, 22 Feb 2000 00:00:02 GMT'}]
|
2015-06-26
|
[array(['Kiselev', 'Alexander', ''], dtype=object)
array(['Ryzhik', 'Leonid', ''], dtype=object)]
|
4,119 |
2101.08736
|
Alexander Stokolos
|
Dmitriy Dmitrishin, Paul Hagelstein, and Alex Stokolos
|
Sharp weak type estimates for a family of Soria bases
| null | null | null | null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $\mathcal{B}$ be a collection of rectangular parallelepipeds in
$\mathbb{R}^3$ whose sides are parallel to the coordinate axes and such that
$\mathcal{B}$ contains parallelepipeds with side lengths of the form $s,
\frac{2^N}{s} , t $, where $s, t > 0$ and $N$ lies in a nonempty subset $S$ of
the natural numbers. We show that if $S$ is an infinite set, then the
associated geometric maximal operator $M_\mathcal{B}$ satisfies the weak type
estimate
$$\left|\left\{x \in \mathbb{R}^3 : M_{\mathcal{B}}f(x) >
\alpha\right\}\right| \leq C \int_{\mathbb{R}^3} \frac{|f|}{\alpha} \left(1 +
\log^+ \frac{|f|}{\alpha}\right)^{2}$$ but does not satisfy an estimate of the
form
$$\left|\left\{x \in \mathbb{R}^3 : M_{\mathcal{B}}f(x) >
\alpha\right\}\right| \leq C \int_{\mathbb{R}^3}
\phi\left(\frac{|f|}{\alpha}\right)$$ for any convex increasing function $\phi:
\mathbb[0, \infty) \rightarrow [0, \infty)$ satisfying the condition $$\lim_{x
\rightarrow \infty}\frac{\phi(x)}{x (\log(1 + x))^2} = 0\;.$$
|
[{'version': 'v1', 'created': 'Thu, 21 Jan 2021 17:28:42 GMT'}]
|
2021-01-22
|
[array(['Dmitrishin', 'Dmitriy', ''], dtype=object)
array(['Hagelstein', 'Paul', ''], dtype=object)
array(['Stokolos', 'Alex', ''], dtype=object)]
|
4,120 |
1002.1702
|
Troy Borneman
|
Troy W. Borneman, Martin D. Hurlimann, David G. Cory
|
Application of Optimal Control to CPMG Refocusing Pulse Design
|
23 pages, 10 figures; Revised and reformatted version with new title
and significant changes to Introduction and Conclusions sections
|
J. Magn. Reson. 207, 220-233 (2010)
|
10.1016/j.jmr.2010.09.003
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We apply optimal control theory (OCT) to the design of refocusing pulses
suitable for the CPMG sequence that are robust over a wide range of B0 and B1
offsets. We also introduce a model, based on recent progress in the analysis of
unitary dynamics in the field of quantum information processing (QIP), that
describes the multiple refocusing dynamics of the CPMG sequence as a dephasing
Pauli channel. This model provides a compact characterization of the
consequences and severity of residual pulse errors. We illustrate the methods
by considering a specific example of designing and analyzing broadband OCT
refocusing pulses of length 10 t180 that are constrained by the maximum
instantaneous pulse power. We show that with this refocusing pulse, the CPMG
sequence can refocus over 98% of magnetization for resonance offsets up to 3.2
times the maximum RF amplitude, even in the presence of +/- 10% RF
inhomogeneity.
|
[{'version': 'v1', 'created': 'Mon, 8 Feb 2010 20:13:56 GMT'}
{'version': 'v2', 'created': 'Tue, 12 Oct 2010 15:36:23 GMT'}]
|
2011-01-24
|
[array(['Borneman', 'Troy W.', ''], dtype=object)
array(['Hurlimann', 'Martin D.', ''], dtype=object)
array(['Cory', 'David G.', ''], dtype=object)]
|
4,121 |
0806.1616
|
Michael Hartmann Mr
|
Michael J. Hartmann and Martin B. Plenio
|
Steady state entanglement in the mechanical vibrations of two dielectric
membranes
|
example for higher environment temperatures added, further
explanations added to the text
|
Phys. Rev. Lett. 101, 200503 (2008)
|
10.1103/PhysRevLett.101.200503
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider two dielectric membranes suspended inside a Fabry-Perot-cavity,
which are cooled to a steady state via a drive by suitable classical lasers. We
show that the vibrations of the membranes can be entangled in this steady
state. They thus form two mechanical, macroscopic degrees of freedom that share
steady state entanglement.
|
[{'version': 'v1', 'created': 'Tue, 10 Jun 2008 09:50:48 GMT'}
{'version': 'v2', 'created': 'Mon, 15 Sep 2008 14:29:46 GMT'}]
|
2009-11-13
|
[array(['Hartmann', 'Michael J.', ''], dtype=object)
array(['Plenio', 'Martin B.', ''], dtype=object)]
|
4,122 |
chao-dyn/9712005
|
J. R. Dorfman
|
J. R. Dorfman (Institute for Physical Science and Technology and
Department of Physics, University of Maryland, College Park, Maryland, USA)
|
Deterministic Chaos and the Foundations of the Kinetic Theory of Gases
|
To appear in the proceedings of the summer school on Fundamental
Problems in Statistical Mechanics, Altenberg, Germany, 1997
| null |
10.1016/S0370-1573(98)00009-X
| null |
chao-dyn nlin.CD
| null |
Recent work in dynamical systems theory has shown that many properties that
are associated with irreversible processes in fluids can be understood in terms
of the dynamical properties of reversible, Hamiltonian systems. That is,
stochastic-like behavior is possible for these systems. Here we review the
basic theory for this stochastic-like behavior and show how it may be used to
obtain an understanding of irreversible processes in gases and fluids. Recent,
closely related, work on the use of kinetic theory to calculate dynamical
quantities such as Lyapunov exponents is also discussed.
|
[{'version': 'v1', 'created': 'Thu, 4 Dec 1997 20:06:51 GMT'}]
|
2015-06-24
|
[array(['Dorfman', 'J. R.', '',
'Institute for Physical Science and Technology and\n Department of Physics, University of Maryland, College Park, Maryland, USA'],
dtype=object) ]
|
4,123 |
cond-mat/0201073
|
Entin-Wohlman
|
O. Entin-Wohlman, A. Aharony, Y. Levinson
|
Adiabatic transport in nanostructures
|
8 pages, 2 figures
| null |
10.1103/PhysRevB.65.195411
| null |
cond-mat.mes-hall cond-mat.dis-nn
| null |
A confined system of non-interacting electrons, subject to the combined
effect of a time-dependent potential and different external
chemical-potentials, is considered. The current flowing through such a system
is obtained for arbitrary strengths of the modulating potential, using the
adiabatic approximation in an iterative manner. A new formula is derived for
the charge pumped through an un-biased system (all external chemical potentials
are kept at the same value); It reproduces the Brouwer formula for a
two-terminal nanostructure. The formalism presented yields the effect of the
chemical potential bias on the pumped charge on one hand, and the modification
of the Landauer formula (which gives the current in response to a constant
chemical-potential difference) brought about by the modulating potential on the
other. Corrections to the adiabatic approximation are derived and discussed.
|
[{'version': 'v1', 'created': 'Mon, 7 Jan 2002 10:58:48 GMT'}]
|
2009-11-07
|
[array(['Entin-Wohlman', 'O.', ''], dtype=object)
array(['Aharony', 'A.', ''], dtype=object)
array(['Levinson', 'Y.', ''], dtype=object)]
|
4,124 |
2103.15211
|
Rrezarta Krasniqi
|
Rrezarta Krasniqi
|
Extractive Summarization of Related Bug-fixing Comments in Support of
Bug Repair
|
2 pages
| null | null | null |
cs.SE
|
http://creativecommons.org/licenses/by/4.0/
|
When developers investigate a new bug report, they search for similar
previously fixed bug reports and discussion threads attached to them. These
discussion threads convey important information about the behavior of the bug
including relevant bug-fixing comments. Oftentimes, these discussion threads
become extensively lengthy due to the severity of the reported bug. This adds
another layer of complexity, especially if relevant bug-fixing comments
intermingle with seemingly unrelated comments. To manually detect these
relevant comments among various cross-cutting discussion threads can become a
daunting task when dealing with high volume of bug reports. To automate this
process, our focus is to initially extract and detect comments in the context
of query relevance, the use of positive language, and semantic relevance. Then,
we merge these comments in the form of a summary for easy understanding.
Specifically, we combine Sentiment Analysis and the TextRank Model with the
baseline Vector Space Model (VSM). Preliminary findings indicate that
bug-fixing comments tend to be positive and there exists a semantic relevance
with comments from other cross-cutting discussion threads. The results also
indicate that our combined approach improves overall ranking performance
against the baseline VSM.
|
[{'version': 'v1', 'created': 'Sun, 28 Mar 2021 19:47:23 GMT'}
{'version': 'v2', 'created': 'Tue, 25 May 2021 17:19:20 GMT'}]
|
2021-05-26
|
[array(['Krasniqi', 'Rrezarta', ''], dtype=object)]
|
4,125 |
1303.0173
|
Chiara Macchiavello
|
Chiara Macchiavello and Giovanna Morigi
|
Entanglement detection by Bragg scattering
|
4 pages, 2 figures, final version (refs added + minor changes)
|
Phys. Rev. A 87, 044301 (2013)
|
10.1103/PhysRevA.87.044301
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show how to measure the structural witnesses proposed in [P. Krammer et
al., Phys. Rev. Lett. 103, 100502 (2009)] for detecting entanglement in a spin
chain using photon scattering. The procedure, moreover, allows one to measure
the two-point correlation function of the spin array. This proposal could be
performed in existing experimental platforms realizing ion chains in Paul traps
or atomic arrays in optical lattices.
|
[{'version': 'v1', 'created': 'Fri, 1 Mar 2013 14:10:21 GMT'}
{'version': 'v2', 'created': 'Thu, 16 May 2013 11:02:29 GMT'}]
|
2015-06-15
|
[array(['Macchiavello', 'Chiara', ''], dtype=object)
array(['Morigi', 'Giovanna', ''], dtype=object)]
|
4,126 |
2204.11388
|
Daowen Qiu
|
Jiawei Tan, Ligang Xiao, Daowen Qiu, Le Luo, Paulo Mateus
|
Distributed quantum algorithm for Simon's problem
|
6 pages, 2 figures, comments are welcome
| null |
10.1103/PhysRevA.106.032417
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Limited by today's physical devices, quantum circuits are usually noisy and
difficult to be designed deeply. The novel computing architecture of
distributed quantum computing is expected to reduce the noise and depth of
quantum circuits. In this paper, we study the Simon's problem in distributed
scenarios and design a distributed quantum algorithm to solve the problem. The
algorithm proposed by us has the advantage of exponential acceleration compared
with the classical distributed computing, and has the advantage of square
acceleration compared with the best distributed quantum algorithm proposed
before. In particular, the previous distributed quantum algorithm for Simon's
problem can not be extended to the case of more than {\it two computing nodes}
(i.e. two subproblems), but our distributed quantum algorithm can be extended
to the case of {\it multiple computing nodes} (i.e. multiple subproblems) as
well.
|
[{'version': 'v1', 'created': 'Mon, 25 Apr 2022 01:22:22 GMT'}
{'version': 'v2', 'created': 'Thu, 28 Apr 2022 01:45:42 GMT'}
{'version': 'v3', 'created': 'Thu, 5 May 2022 03:06:52 GMT'}
{'version': 'v4', 'created': 'Fri, 6 May 2022 16:03:58 GMT'}]
|
2022-10-05
|
[array(['Tan', 'Jiawei', ''], dtype=object)
array(['Xiao', 'Ligang', ''], dtype=object)
array(['Qiu', 'Daowen', ''], dtype=object)
array(['Luo', 'Le', ''], dtype=object)
array(['Mateus', 'Paulo', ''], dtype=object)]
|
4,127 |
1901.10650
|
Song Bai
|
Song Bai, Yingwei Li, Yuyin Zhou, Qizhu Li, Philip H.S. Torr
|
Adversarial Metric Attack and Defense for Person Re-identification
|
Accepted by IEEE Transactions on Pattern Analysis and Machine
Intelligence (TPAMI)
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Person re-identification (re-ID) has attracted much attention recently due to
its great importance in video surveillance. In general, distance metrics used
to identify two person images are expected to be robust under various
appearance changes. However, our work observes the extreme vulnerability of
existing distance metrics to adversarial examples, generated by simply adding
human-imperceptible perturbations to person images. Hence, the security danger
is dramatically increased when deploying commercial re-ID systems in video
surveillance. Although adversarial examples have been extensively applied for
classification analysis, it is rarely studied in metric analysis like person
re-identification. The most likely reason is the natural gap between the
training and testing of re-ID networks, that is, the predictions of a re-ID
network cannot be directly used during testing without an effective metric. In
this work, we bridge the gap by proposing Adversarial Metric Attack, a parallel
methodology to adversarial classification attacks. Comprehensive experiments
clearly reveal the adversarial effects in re-ID systems. Meanwhile, we also
present an early attempt of training a metric-preserving network, thereby
defending the metric against adversarial attacks. At last, by benchmarking
various adversarial settings, we expect that our work can facilitate the
development of adversarial attack and defense in metric-based applications.
|
[{'version': 'v1', 'created': 'Wed, 30 Jan 2019 02:41:50 GMT'}
{'version': 'v2', 'created': 'Sat, 23 Mar 2019 04:23:51 GMT'}
{'version': 'v3', 'created': 'Sat, 10 Oct 2020 14:50:18 GMT'}]
|
2020-10-13
|
[array(['Bai', 'Song', ''], dtype=object)
array(['Li', 'Yingwei', ''], dtype=object)
array(['Zhou', 'Yuyin', ''], dtype=object)
array(['Li', 'Qizhu', ''], dtype=object)
array(['Torr', 'Philip H. S.', ''], dtype=object)]
|
4,128 |
2011.12304
|
Kristjan Kannike
|
Kristjan Kannike, Kaius Loos, Luca Marzola
|
Minima of Classically Scale-Invariant Potentials
|
43 pages, 6 figures, published version
| null |
10.1007/JHEP06(2021)128
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a new formalism to analyse the extremum structure of
scale-invariant effective potentials. The problem is stated in a compact matrix
form, used to derive general expressions for the stationary point equation and
the mass matrix of a multi-field RG-improved effective potential. Our method
improves on (but is not limited to) the Gildener-Weinberg approximation and
identifies a set of conditions that signal the presence of a radiative minimum.
When the conditions are satisfied at different scales, or in different
subspaces of the field space, the effective potential has more than one
radiative minimum. We illustrate the method through simple examples and study
in detail a Standard-Model-like scenario where the potential admits two
radiative minima. Whereas we mostly concentrate on biquadratic potentials, our
results carry over to the general case by using tensor algebra.
|
[{'version': 'v1', 'created': 'Tue, 24 Nov 2020 19:00:01 GMT'}
{'version': 'v2', 'created': 'Thu, 11 Nov 2021 13:07:08 GMT'}]
|
2021-11-12
|
[array(['Kannike', 'Kristjan', ''], dtype=object)
array(['Loos', 'Kaius', ''], dtype=object)
array(['Marzola', 'Luca', ''], dtype=object)]
|
4,129 |
1705.07508
|
Seyed Hesam Mousavi
|
Seyed Hesam Mousavi, Shohreh Fatemi, Marjan Razavian
|
A Comparative study of catalytic activity and lifetime of novel
micro-meso porous catalysts in MTO process
| null | null | null | null |
physics.app-ph cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, two kinds of mesoporous catalysts with high propylene selectivity
in propane dehydrogenation (PDH) process has been successfully synthesized. The
first proposed catalyst is SAPO-34 molecular sieve with hierarchical tuned
nanostructure. The second catalyst is a novel bi-phase SAPO-34/ZSM-5 zeolite
hierarchical composite utilized with TPA-SAPO-34 exchanged core cystals being
wrapped by ZSM-5 zeolite particles. In this contribution, the physico-chemical
properties of the catalysts were analyzed by XRD, FESEM and N2
adsorption-desorption techniques and their catalytic activity and life time
were investigated in MTO process. The results show that hierarchical SAPO-34
has a significant lifetime and selectivity to the light olefins compared with
SAPO-34/ZSM-5. It shows a full conversion of MeOH during the first 200 min of
reaction while composite sample conversion starts under 90 % and decreases
during the time. However the deactivation phenomenon is hindered by using
core-shell catalyst; hence the robustness can be named as a privilege employing
composite zeolitic catalysts.
|
[{'version': 'v1', 'created': 'Sun, 21 May 2017 20:41:39 GMT'}]
|
2017-05-23
|
[array(['Mousavi', 'Seyed Hesam', ''], dtype=object)
array(['Fatemi', 'Shohreh', ''], dtype=object)
array(['Razavian', 'Marjan', ''], dtype=object)]
|
4,130 |
physics/0203020
|
Joe Henson
|
Joe Henson
|
Consciousness in Physics
|
This paper has been withdrawn by the author, due to large numbers of
crank responses
| null | null | null |
physics.gen-ph
| null |
This essay discusses the idea that a Theory of Everything would not be
complete without a theory of consciousness as one of its parts, and the
suggestion that new physics may be needed to describe consciousness. I argue
that the motivations behind searching for such a theory arise as the result of
misunderstandings over the use of language when talking about consciousness.
|
[{'version': 'v1', 'created': 'Thu, 7 Mar 2002 14:55:54 GMT'}
{'version': 'v2', 'created': 'Sat, 22 Jan 2005 00:55:15 GMT'}]
|
2007-05-23
|
[array(['Henson', 'Joe', ''], dtype=object)]
|
4,131 |
gr-qc/9406019
| null |
A. Connes and C. Rovelli
|
Von Neumann Algebra Automorphisms and Time-Thermodynamics Relation in
General Covariant Quantum Theories
|
25 pages, LaTex
|
Class.Quant.Grav.11:2899-2918,1994
|
10.1088/0264-9381/11/12/007
| null |
gr-qc
| null |
We consider the cluster of problems raised by the relation between the notion
of time, gravitational theory, quantum theory and thermodynamics; in
particular, we address the problem of relating the "timelessness" of the
hypothetical fundamental general covariant quantum field theory with the
"evidence" of the flow of time. By using the algebraic formulation of quantum
theory, we propose a unifying perspective on these problems, based on the
hypothesis that in a generally covariant quantum theory the physical time-flow
is not a universal property of the mechanical theory, but rather it is
determined by the thermodynamical state of the system ("thermal time
hypothesis"). We implement this hypothesis by using a key structural property
of von Neumann algebras: the Tomita-Takesaki theorem, which allows to derive a
time-flow, namely a one-parameter group of automorphisms of the observable
algebra, from a generic thermal physical state. We study this time-flow, its
classical limit, and we relate it to various characteristic theoretical facts,
as the Unruh temperature and the Hawking radiation. We also point out the
existence of a state-independent notion of "time", given by the canonical
one-parameter subgroup of outer automorphisms provided by the Cocycle
Radon-Nikodym theorem.
|
[{'version': 'v1', 'created': 'Tue, 14 Jun 1994 09:15:26 GMT'}]
|
2010-04-06
|
[array(['Connes', 'A.', ''], dtype=object)
array(['Rovelli', 'C.', ''], dtype=object)]
|
4,132 |
2009.00816
|
Xiang-Bin Wang
|
Cong Jiang, Zong-Wen Yu, Xiao-Long Hu, Xiang-Bin Wang
|
Sending-or-not-sending twin-filed quantum key distribution with discrete
phase modulation
| null |
Physical Review Research 2, 043304 (2020)
|
10.1103/PhysRevResearch.2.043304
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the sending-or-not-sending (SNS) protocol with discrete phase
modulation of coherent states. We first make the security of the SNS protocol
with discrete phase modulation. We then present analytic formulas for key rate
calculation. We take numerical simulations for the key rate through discrete
phase modulation of both the original SNS protocol and the SNS protocol with
two way classical communications of active-odd-parity pairing (AOPP). Our
numerical simulation results show that only with $6$ phase values, the key
rates of the SNS protocol can exceed the linear bound, and with $12$ phase
values, the key rates are very close to the results of the SNS protocol with
continuously modulated phase-randomization.
|
[{'version': 'v1', 'created': 'Wed, 2 Sep 2020 04:46:57 GMT'}]
|
2021-01-14
|
[array(['Jiang', 'Cong', ''], dtype=object)
array(['Yu', 'Zong-Wen', ''], dtype=object)
array(['Hu', 'Xiao-Long', ''], dtype=object)
array(['Wang', 'Xiang-Bin', ''], dtype=object)]
|
4,133 |
1508.04328
|
Pierre-Luc Dallaire-Demers
|
Pierre-Luc Dallaire-Demers and Frank K. Wilhelm
|
A method to efficiently simulate the thermodynamical properties of the
Fermi-Hubbard model on a quantum computer
|
19 pages, 14 figures
|
Phys. Rev. A 93, 032303 (2016)
|
10.1103/PhysRevA.93.032303
| null |
quant-ph cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Many phenomena of strongly correlated materials are encapsulated in the
Fermi-Hubbard model whose thermodynamical properties can be computed from its
grand canonical potential according to standard procedures. In general, there
is no closed form solution for lattices of more than one spatial dimension, but
solutions can be approximated with cluster perturbation theory. To model
long-range effects such as order parameters, a powerful method to compute the
cluster's Green's function consists in finding its self-energy through a
variational principle of the grand canonical potential. This opens the
possibility of studying various phase transitions at finite temperature in the
Fermi-Hubbard model. However, a classical cluster solver quickly hits an
exponential wall in the memory (or computation time) required to store the
computation variables. Here it is shown theoretically that that the cluster
solver can be mapped to a subroutine on a quantum computer whose quantum memory
scales as the number of orbitals in the simulated cluster. A quantum computer
with a few tens of qubits could therefore simulate the thermodynamical
properties of complex fermionic lattices inaccessible to classical
supercomputers.
|
[{'version': 'v1', 'created': 'Tue, 18 Aug 2015 14:28:48 GMT'}
{'version': 'v2', 'created': 'Fri, 27 Nov 2015 14:26:21 GMT'}]
|
2016-03-09
|
[array(['Dallaire-Demers', 'Pierre-Luc', ''], dtype=object)
array(['Wilhelm', 'Frank K.', ''], dtype=object)]
|
4,134 |
2101.10782
|
Marinella Petrocchi
|
Alessandro Balestrucci, Rocco De Nicola, Marinella Petrocchi, Catia
Trubiani
|
A Behavioural Analysis of Credulous Twitter Users
|
Under submission
| null | null | null |
cs.SI
|
http://creativecommons.org/licenses/by/4.0/
|
Thanks to platforms such as Twitter and Facebook, people can know facts and
events that otherwise would have been silenced. However, social media
significantly contribute also to fast spreading biased and false news while
targeting specific segments of the population. We have seen how false
information can be spread using automated accounts, known as bots. Using
Twitter as a benchmark, we investigate behavioural attitudes of so called
`credulous' users, i.e., genuine accounts following many bots. Leveraging our
previous work, where supervised learning is successfully applied to single out
credulous users, we improve the classification task with a detailed features'
analysis and provide evidence that simple and lightweight features are crucial
to detect such users. Furthermore, we study the differences in the way
credulous and not credulous users interact with bots and discover that
credulous users tend to amplify more the content posted by bots and argue that
their detection can be instrumental to get useful information on possible
dissemination of spam content, propaganda, and, in general, little or no
reliable information.
|
[{'version': 'v1', 'created': 'Tue, 26 Jan 2021 13:44:11 GMT'}]
|
2021-01-27
|
[array(['Balestrucci', 'Alessandro', ''], dtype=object)
array(['De Nicola', 'Rocco', ''], dtype=object)
array(['Petrocchi', 'Marinella', ''], dtype=object)
array(['Trubiani', 'Catia', ''], dtype=object)]
|
4,135 |
1601.02888
|
Nanda Kishore Reddy
|
Nanda Kishore Reddy
|
Equality of Lyapunov and stability exponents for products of isotropic
random matrices
| null | null | null | null |
math.PR math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that Lyapunov exponents and stability exponents are equal in the case
of product of $i.i.d$ isotropic(also known as bi-unitarily invariant) random
matrices. We also derive aysmptotic distribution of singular values and
eigenvalues of these product random matrices. Moreover, Lyapunov exponents are
distinct, unless the random matrices are random scalar multiples of Haar
unitary matrices or orthogonal matrices. As a corollary of above result, we
show probability that product of $n$ $i.i.d$ real isotropic random matrices has
all eigenvalues real goes to one as $n \to \infty$. Also, in the proof of a
lemma, we observe that a real (complex) Ginibre matrix can be written as
product of a random lower triangular matrix and an independent truncated Haar
orthogonal (unitary) matrix.
|
[{'version': 'v1', 'created': 'Tue, 12 Jan 2016 14:50:15 GMT'}]
|
2016-01-13
|
[array(['Reddy', 'Nanda Kishore', ''], dtype=object)]
|
4,136 |
1201.3904
|
Vincent Duch\^ene M.
|
Vincent Duch\^ene and Iva Vuki\'cevi\'c and Michael I. Weinstein
|
Scattering and Localization Properties of Highly Oscillatory Potentials
|
to appear in Communications on Pure and Applied Mathematics
|
Comm. Pure Appl. Math. 67(1), pp. 83-128 (2014)
|
10.1002/cpa.21459
| null |
math.AP math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate scattering, localization and dispersive time-decay properties
for the one-dimensional Schr\"odinger equation with a rapidly oscillating and
spatially localized potential, $q_\epsilon=q(x,x/\epsilon)$, where $q(x,y)$ is
periodic and mean zero with respect to $y$. Such potentials model a
microstructured medium. Homogenization theory fails to capture the correct
low-energy ($k$ small) behavior of scattering quantities, e.g. the transmission
coefficient, $t^{q_\epsilon}(k)$, as $\epsilon$ tends to zero. We derive an
effective potential well,
$\sigma^\epsilon_{eff}(x)=-\epsilon^2\Lambda_{eff}(x)$, such that
$t^{q_\epsilon}(k)-t^{\sigma^\epsilon_{eff}}(k)$ is uniformly small on
$\mathbb{R}$ and small in any bounded subset of a suitable complex strip.
Within such a bounded subset, the scaled transmission coefficient has a
universal form, depending on a single parameter, which is computable from the
effective potential. A consequence is that if $\epsilon$, the scale of
oscillation of the microstructure potential, is sufficiently small, then there
is a pole of the transmission coefficient (and hence of the resolvent) in the
upper half plane, on the imaginary axis at a distance of order $\epsilon^2$
from zero. It follows that the Schr\"odinger operator
$H_{q_\epsilon}=-\partial_x^2+q_\epsilon(x)$ has an $L^2$ bound state with
negative energy situated at a distance $O(\epsilon^4)$ from the edge of the
continuous spectrum. Finally, we use this detailed information to prove a local
energy time-decay estimate of the time-dependent Schr\"odinger equation.
|
[{'version': 'v1', 'created': 'Wed, 18 Jan 2012 20:34:36 GMT'}
{'version': 'v2', 'created': 'Mon, 27 Aug 2012 18:16:57 GMT'}]
|
2021-10-01
|
[array(['Duchêne', 'Vincent', ''], dtype=object)
array(['Vukićević', 'Iva', ''], dtype=object)
array(['Weinstein', 'Michael I.', ''], dtype=object)]
|
4,137 |
2208.01222
|
Hang Ma
|
Xinyi Zhong, Jiaoyang Li, Sven Koenig, Hang Ma
|
Optimal and Bounded-Suboptimal Multi-Goal Task Assignment and Path
Finding
|
ICRA 2022
| null | null | null |
cs.AI cs.MA cs.RO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We formalize and study the multi-goal task assignment and path finding
(MG-TAPF) problem from theoretical and algorithmic perspectives. The MG-TAPF
problem is to compute an assignment of tasks to agents, where each task
consists of a sequence of goal locations, and collision-free paths for the
agents that visit all goal locations of their assigned tasks in sequence.
Theoretically, we prove that the MG-TAPF problem is NP-hard to solve optimally.
We present algorithms that build upon algorithmic techniques for the
multi-agent path finding problem and solve the MG-TAPF problem optimally and
bounded-suboptimally. We experimentally compare these algorithms on a variety
of different benchmark domains.
|
[{'version': 'v1', 'created': 'Tue, 2 Aug 2022 03:17:29 GMT'}]
|
2022-08-03
|
[array(['Zhong', 'Xinyi', ''], dtype=object)
array(['Li', 'Jiaoyang', ''], dtype=object)
array(['Koenig', 'Sven', ''], dtype=object)
array(['Ma', 'Hang', ''], dtype=object)]
|
4,138 |
1202.3703
|
E. Busra Celikkaya
|
E. Busra Celikkaya, Christian R. Shelton, William Lam
|
Factored Filtering of Continuous-Time Systems
| null | null | null |
UAI-P-2011-PG-61-68
|
cs.SY cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider filtering for a continuous-time, or asynchronous, stochastic
system where the full distribution over states is too large to be stored or
calculated. We assume that the rate matrix of the system can be compactly
represented and that the belief distribution is to be approximated as a product
of marginals. The essential computation is the matrix exponential. We look at
two different methods for its computation: ODE integration and uniformization
of the Taylor expansion. For both we consider approximations in which only a
factored belief state is maintained. For factored uniformization we demonstrate
that the KL-divergence of the filtering is bounded. Our experimental results
confirm our factored uniformization performs better than previously suggested
uniformization methods and the mean field algorithm.
|
[{'version': 'v1', 'created': 'Tue, 14 Feb 2012 16:41:17 GMT'}]
|
2012-02-20
|
[array(['Celikkaya', 'E. Busra', ''], dtype=object)
array(['Shelton', 'Christian R.', ''], dtype=object)
array(['Lam', 'William', ''], dtype=object)]
|
4,139 |
2301.11233
|
Haotong Qin
|
Haotong Qin, Mingyuan Zhang, Yifu Ding, Aoyu Li, Zhongang Cai, Ziwei
Liu, Fisher Yu, Xianglong Liu
|
BiBench: Benchmarking and Analyzing Network Binarization
| null |
2023 International Conference on Machine Learning
| null | null |
cs.CV cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Network binarization emerges as one of the most promising compression
approaches offering extraordinary computation and memory savings by minimizing
the bit-width. However, recent research has shown that applying existing
binarization algorithms to diverse tasks, architectures, and hardware in
realistic scenarios is still not straightforward. Common challenges of
binarization, such as accuracy degradation and efficiency limitation, suggest
that its attributes are not fully understood. To close this gap, we present
BiBench, a rigorously designed benchmark with in-depth analysis for network
binarization. We first carefully scrutinize the requirements of binarization in
the actual production and define evaluation tracks and metrics for a
comprehensive and fair investigation. Then, we evaluate and analyze a series of
milestone binarization algorithms that function at the operator level and with
extensive influence. Our benchmark reveals that 1) the binarized operator has a
crucial impact on the performance and deployability of binarized networks; 2)
the accuracy of binarization varies significantly across different learning
tasks and neural architectures; 3) binarization has demonstrated promising
efficiency potential on edge devices despite the limited hardware support. The
results and analysis also lead to a promising paradigm for accurate and
efficient binarization. We believe that BiBench will contribute to the broader
adoption of binarization and serve as a foundation for future research. The
code for our BiBench is released https://github.com/htqin/BiBench .
|
[{'version': 'v1', 'created': 'Thu, 26 Jan 2023 17:17:16 GMT'}
{'version': 'v2', 'created': 'Sat, 20 May 2023 11:04:19 GMT'}]
|
2023-05-23
|
[array(['Qin', 'Haotong', ''], dtype=object)
array(['Zhang', 'Mingyuan', ''], dtype=object)
array(['Ding', 'Yifu', ''], dtype=object)
array(['Li', 'Aoyu', ''], dtype=object)
array(['Cai', 'Zhongang', ''], dtype=object)
array(['Liu', 'Ziwei', ''], dtype=object)
array(['Yu', 'Fisher', ''], dtype=object)
array(['Liu', 'Xianglong', ''], dtype=object)]
|
4,140 |
1912.09310
|
Francesco Ferrari
|
Francesco Ferrari, Federico Becca
|
Dynamical properties of N\'eel and valence-bond phases in the $J_1-J_2$
model on the honeycomb lattice
| null | null |
10.1088/1361-648X/ab7f6e
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
By using a variational Monte Carlo technique based upon Gutzwiller-projected
fermionic states, we investigate the dynamical structure factor of the
antiferromagnetic $S=1/2$ Heisenberg model on the honeycomb lattice, in
presence of first-neighbor ($J_1$) and second-neighbor ($J_2$) couplings, for
${J_2 < 0.5 J_1}$. The ground state of the system shows long-range
antiferromagnetic order for ${J_2/J_1 \lesssim 0.23}$, plaquette valence-bond
order for ${0.23 \lesssim J_2/J_1 \lesssim 0.36}$, and columnar dimer order for
${J_2/J_1 \gtrsim 0.36}$. Within the antiferromagnetic state, a well-defined
magnon mode is observed, whose dispersion is in relatively good agreement with
linear spin-wave approximation for $J_2=0$. When a nonzero second-neighbor
super-exchange is included, a roton-like mode develops around the $K$ point
(i.e., the corner of the Brillouin zone). This mode softens when $J_2/J_1$ is
increased and becomes gapless at the transition point, $J_2/J_1 \approx 0.23$.
Here, a broad continuum of states is clearly visible in the dynamical spectrum,
suggesting that nearly-deconfined spinon excitations could exist, at least at
relatively high energies. For larger values of $J_2/J_1$, valence-bond order is
detected and the spectrum of the system becomes clearly gapped, with a triplon
mode at low energies. This is particularly evident for the spectrum of the
dimer valence-bond phase, in which the triplon mode is rather well separated
from the continuum of excitations that appears at higher energies.
|
[{'version': 'v1', 'created': 'Thu, 19 Dec 2019 15:49:45 GMT'}]
|
2020-06-24
|
[array(['Ferrari', 'Francesco', ''], dtype=object)
array(['Becca', 'Federico', ''], dtype=object)]
|
4,141 |
2006.00766
|
Natanael Karjanto
|
Natanael Karjanto
|
Mathematical Aspects of Extreme Water Waves
|
194 pages, 52 figures, 176 references, PhD thesis, Department of
Applied Mathematics, University of Twente, the Netherlands, 2006, ISBN-10:
9-03-652431-8, ISBN-13: 978-9-03-652431-5
| null | null | null |
nlin.PS physics.flu-dyn
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
This thesis deals with some theoretical aspects of deterministic freak wave
generation in the wave basin of a hydrodynamic laboratory. We adopt the spatial
nonlinear Schr\"odinger equation as a mathematical model to describe the
deformation of the wave packet envelope while propagating downstream. We study
extensively a family of exact solutions describing modulational instability,
known as the Akhmediev-Eleonski\u{\i}-Kulagin breather. Together with the
Kuznetsov-Ma breather and Peregrine solution, they belong to a class of
solutions called ''solitons on a non-vanishing background''. We present the
dynamics using the variational formulation of the displaced phase-amplitude
representation. From the corresponding physical wave field of the soliton, we
observe that the linear phenomena of vanishing amplitude, phase singularity,
wavefront dislocation occur simultaneously and a necessary condition for these
is the unboundedness of the Chu-Mei quotient. The experimental results
conducted at the high-speed wave basin of Maritime Research Institute
Netherlands show a remarkable qualitative agreement with the predicted
theoretical model, including an amplitude increase, phase singularity, and the
preservation of wave packet frequencies. A further examination suggests some
limitations of the evolution equation since it maintains a symmetry in the wave
signal and wave spectrum throughout downstream propagation instead of
exhibiting an asymmetric wave structure and the frequency downshift phenomenon.
|
[{'version': 'v1', 'created': 'Mon, 1 Jun 2020 07:50:07 GMT'}]
|
2020-06-02
|
[array(['Karjanto', 'Natanael', ''], dtype=object)]
|
4,142 |
hep-ex/0401029
|
Hiroyuki Sagawa
|
K. Abe, et al. (for the Belle Collaboration)
|
Observation of Large CP Violation and Evidence for Direct CP Violation
in B0-->pi+pi- Decays
|
9 pages, 3 figures
|
Phys.Rev.Lett.93:021601,2004
|
10.1103/PhysRevLett.93.021601
|
KEK preprint 2003-110, Belle preprint 2004-1
|
hep-ex
| null |
We report the first observation of CP-violating asymmetries in B0 --> pi+pi-
decays based on a 140 fb-1 data sample collected at the Upsilon(4S) resonance
with the Belle detector at the KEKB asymmetric-energy e+e- collider. We
reconstruct one neutral B meson as a B0 --> pi+pi- CP eigenstate and identify
the flavor of the accompanying B meson from its decay products. We apply an
unbinned maximum likelihood fit to the distribution of the time intervals
between the two B meson decay points. The fit yields the CP-violating asymmetry
amplitudes Apipi = +0.58+/-0.15(stat)+/-0.07(syst) and Spipi =
-1.00+/-0.21(stat)+/-0.07(syst). We rule out the CP-conserving case,
Apipi=Spipi=0, at a level of 5.2 standard deviations. We also find evidence for
direct CP violation with a significance at or greater than 3.2 standard
deviations for any Spipi value.
|
[{'version': 'v1', 'created': 'Sun, 18 Jan 2004 17:44:28 GMT'}
{'version': 'v2', 'created': 'Wed, 21 Apr 2004 05:20:08 GMT'}
{'version': 'v3', 'created': 'Wed, 26 May 2004 08:31:12 GMT'}]
|
2019-08-14
|
[array(['Abe', 'K.', ''], dtype=object)]
|
4,143 |
math/0306033
|
Genadi Levin
|
Genadi Levin, Grzegorz Swiatek
|
Dynamics and Universality of Unimodal Mappings with Infinite Criticality
|
misprints and minor errors are corrected, accepted by the
Communications in Mathematical Physics
| null | null | null |
math.DS
| null |
We consider infinitely renormalizable unimodal mappings with topological type
which is periodic under renormalization. We study the limiting behavior of
fixed points of the renormalization operator as the order of the critical point
increases to infinity. It is shown that a limiting dynamics exists, with a
critical point that is flat, but still having a well-behaved analytic
continuation to a neighborhood of the real interval pinched at the critical
point. We study the dynamics of limiting maps and prove their rigidity. In
particular, the sequence of fixed points of renormalization for finite
criticalities converges, uniformly on the real domain, to a mapping of the
limiting type.
|
[{'version': 'v1', 'created': 'Mon, 2 Jun 2003 15:04:54 GMT'}
{'version': 'v2', 'created': 'Sat, 27 Nov 2004 11:00:41 GMT'}]
|
2007-05-23
|
[array(['Levin', 'Genadi', ''], dtype=object)
array(['Swiatek', 'Grzegorz', ''], dtype=object)]
|
4,144 |
1102.1694
|
Giuliano Niccoli G.
|
G. Niccoli
|
Completeness of Bethe Ansatz by Sklyanin SOV for Cyclic Representations
of Integrable Quantum Models
|
38 pages, two references added, minor modifications
|
JHEP 1103:123,2011
|
10.1007/JHEP03(2011)123
| null |
math-ph hep-th math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In [1] an integrable quantum model was introduced and a class of its cyclic
representations was proven to define lattice regularizations of the Sine-Gordon
model. Here, we analyze general cyclic representations of this integrable
quantum model by extending the spectrum construction introduced in [2] in the
framework of the Separation of Variables (SOV) of Sklyanin. We show that as in
[1] also for general representations, the transfer matrix spectrum (eigenvalues
and eigenstates) is completely characterized in terms of polynomial solutions
of an associated functional Baxter equation. Moreover, we prove that the method
here developed has two fundamental built-in features: i) the completeness of
the set of the transfer matrix eigenstates constructed from the solutions of
the associated Bethe ansatz equations, ii) the existence and complete
characterization of the Baxter Q-operator.
|
[{'version': 'v1', 'created': 'Tue, 8 Feb 2011 19:21:50 GMT'}
{'version': 'v2', 'created': 'Fri, 25 Mar 2011 13:06:22 GMT'}]
|
2011-03-31
|
[array(['Niccoli', 'G.', ''], dtype=object)]
|
4,145 |
2108.09049
|
Zoltan V\"or\"os
|
Zolt\'an V\"or\"os, Ali Varsani, Emiliya Yordanova, Yury L. Sasunov,
Owen W. Roberts, Arp\'ad Kis, Rumi Nakamura, Yasuhito Narita
|
Magnetic Reconnection within the Boundary Layer of a Magnetic Cloud in
the Solar Wind
|
43 pages, 10 figures, accepted in J. Geophys. Res. - Space Phys
| null |
10.1029/2021JA029415
| null |
physics.space-ph astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The twisted local magnetic field at the front or rear regions of the magnetic
clouds (MCs) associated with interplanetary coronal mass ejections (ICMEs) is
often nearly opposite to the direction of the ambient interplanetary magnetic
field (IMF). There is also observational evidence for magnetic reconnection
(MR) outflows occurring within the boundary layers of MCs. In this paper a MR
event located at the western flank of the MC occurring on 2000-10-03 is studied
in detail. Both the large-scale geometry of the helical MC and the MR outflow
structure are scrutinized in a detailed multi-point study. The ICME sheath is
of hybrid propagation-expansion type. Here the freshly reconnected open field
lines are expected to slip slowly over the MC resulting in plasma mixing at the
same time. As for MR, the current sheet geometry and the vertical motion of the
outflow channel between ACE-Geotail-WIND spacecraft was carefully studied and
tested. The main findings on MR include: (1) First-time observation of
non-Petschek-type slow-shock-like discontinuities in the inflow regions; (2)
Observation of turbulent Hall magnetic field associated with a Lorentz force
deflected electron jet; (3) Acceleration of protons by reconnection electric
field and their back-scatter from the slow shock-like discontinuity; (4)
Observation of relativistic electron near the MC inflow boundary/separatrix;
these electron populations can presumably appear as a result of non-adiabatic
acceleration, gradient B drift and via acceleration in the electrostatic
potential well associated with the Hall current system; (5) Observation of
Doppler shifted ion-acoustic and Langmuir waves in the MC inflow region.
|
[{'version': 'v1', 'created': 'Fri, 20 Aug 2021 08:23:13 GMT'}
{'version': 'v2', 'created': 'Wed, 25 Aug 2021 09:06:58 GMT'}]
|
2021-08-26
|
[array(['Vörös', 'Zoltán', ''], dtype=object)
array(['Varsani', 'Ali', ''], dtype=object)
array(['Yordanova', 'Emiliya', ''], dtype=object)
array(['Sasunov', 'Yury L.', ''], dtype=object)
array(['Roberts', 'Owen W.', ''], dtype=object)
array(['Kis', 'Arpád', ''], dtype=object)
array(['Nakamura', 'Rumi', ''], dtype=object)
array(['Narita', 'Yasuhito', ''], dtype=object)]
|
4,146 |
1101.4801
|
Miguel Martinez
|
Arnaud Gloter (DP), Miguel Martinez (LAMA)
|
Distance between two skew Brownian motions as a SDE with jumps and law
of the hitting time
|
27 pages
| null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we consider two skew Brownian motions, driven by the same
Brownian motion, with different starting points and different skewness
coefficients. We show that we can describe the evolution of the distance
between the two processes with a stochastic differential equation. This S.D.E.
possesses a jump component driven by the excursion process of one of the two
skew Brownian motions. Using this representation, we show that the local time
of two skew Brownian motions at their first hitting time is distributed as a
simple function of a Beta random variable. This extends a result by Burdzy and
Chen (2001), where the law of coalescence of two skew Brownian motions with the
same skewness coefficient is computed.
|
[{'version': 'v1', 'created': 'Tue, 25 Jan 2011 13:04:14 GMT'}]
|
2011-01-26
|
[array(['Gloter', 'Arnaud', '', 'DP'], dtype=object)
array(['Martinez', 'Miguel', '', 'LAMA'], dtype=object)]
|
4,147 |
1204.3396
|
Richard J.A.M. Stevens
|
Richard J. A. M. Stevens, Herman Clercx, and Detlef Lohse
|
Heat transport and flow structure in rotating Rayleigh-B\'enard
convection
|
12 pages, 10 figures
|
European Journal of Mechanics B/Fluids 40, 41-49 (2013)
|
10.1016/j.euromechflu.2013.01.004
| null |
physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Here we summarize the results from our direct numerical simulations (DNS) and
experimental measurements on rotating Rayleigh-B\'enard (RB) convection. Our
experiments and simulations are performed in cylindrical samples with an aspect
ratio \Gamma varying from 1/2 to 2. Here \Gamma=D/L, where D and L are the
diameter and height of the sample, respectively. When the rotation rate is
increased, while a fixed temperature difference between the hot bottom and cold
top plate is maintained, a sharp increase in the heat transfer is observed
before the heat transfer drops drastically at stronger rotation rates. Here we
focus on the question of how the heat transfer enhancement with respect to the
non-rotating case depends on the Rayleigh number Ra, the Prandtl number Pr, and
the rotation rate, indicated by the Rossby number Ro. Special attention will be
given to the influence of the aspect ratio on the rotation rate that is
required to get heat transport enhancement. In addition, we will discuss the
relation between the heat transfer and the large scale flow structures that are
formed in the different regimes of rotating RB convection and how the different
regimes can be identified in experiments and simulations.
|
[{'version': 'v1', 'created': 'Mon, 16 Apr 2012 08:10:23 GMT'}
{'version': 'v2', 'created': 'Thu, 20 Jun 2013 12:24:50 GMT'}]
|
2013-06-21
|
[array(['Stevens', 'Richard J. A. M.', ''], dtype=object)
array(['Clercx', 'Herman', ''], dtype=object)
array(['Lohse', 'Detlef', ''], dtype=object)]
|
4,148 |
1407.8532
|
Pasi Huovinen
|
Pasi Huovinen, Peter Petreczky, Christian Schmidt
|
Equation of state at finite net-baryon density using Taylor coefficients
up to sixth order
|
4 pages, 5 figures, proceedings of the XXIV Quark Matter conference,
May 19-24 2014, Darmstadt, Germany
| null |
10.1016/j.nuclphysa.2014.08.069
| null |
nucl-th hep-lat
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We employ the lattice QCD data on Taylor expansion coefficients up to sixth
order to construct an equation of state at finite net-baryon density. When we
take into account how hadron masses depend on lattice spacing and quark mass,
the coefficients evaluated using the p4 action are equal to those of hadron
resonance gas at low temperature. Thus the parametrised equation of state can
be smoothly connected to the hadron resonance gas equation of state. We see
that the equation of state using Taylor coefficients up to second order is
realistic only at low densities, and that at densities corresponding to s/n_B >
40, the expansion converges by the sixth order term.
|
[{'version': 'v1', 'created': 'Thu, 31 Jul 2014 19:00:15 GMT'}]
|
2015-06-22
|
[array(['Huovinen', 'Pasi', ''], dtype=object)
array(['Petreczky', 'Peter', ''], dtype=object)
array(['Schmidt', 'Christian', ''], dtype=object)]
|
4,149 |
1111.0708
|
Pedro Alejandro Ortega
|
Pedro A. Ortega
|
Bayesian Causal Induction
|
4 pages, 4 figures; 2011 NIPS Workshop on Philosophy and Machine
Learning
| null | null | null |
stat.ML cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Discovering causal relationships is a hard task, often hindered by the need
for intervention, and often requiring large amounts of data to resolve
statistical uncertainty. However, humans quickly arrive at useful causal
relationships. One possible reason is that humans extrapolate from past
experience to new, unseen situations: that is, they encode beliefs over causal
invariances, allowing for sound generalization from the observations they
obtain from directly acting in the world.
Here we outline a Bayesian model of causal induction where beliefs over
competing causal hypotheses are modeled using probability trees. Based on this
model, we illustrate why, in the general case, we need interventions plus
constraints on our causal hypotheses in order to extract causal information
from our experience.
|
[{'version': 'v1', 'created': 'Thu, 3 Nov 2011 01:32:44 GMT'}
{'version': 'v2', 'created': 'Wed, 30 Nov 2011 01:12:16 GMT'}]
|
2011-12-01
|
[array(['Ortega', 'Pedro A.', ''], dtype=object)]
|
4,150 |
1507.08743
|
Wadim Zudilin
|
Matilde Lal\'in, Detchat Samart, Wadim Zudilin
|
Further explorations of Boyd's conjectures and a conductor 21 elliptic
curve
|
21 pages
|
J. London Math. Soc. (2) 93:2 (2016) 341--360
|
10.1112/jlms/jdv073
| null |
math.NT math.AG math.CA math.KT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove that the (logarithmic) Mahler measure $m(P)$ of
$P(x,y)=x+1/x+y+1/y+3$ is equal to the $L$-value $2L'(E,0)$ attached to the
elliptic curve $E:P(x,y)=0$ of conductor 21. In order to do this we investigate
the measure of a more general Laurent polynomial
$P_{a,b,c}(x,y)=a(x+1/x)+b(y+1/y)+c$ and show that the wanted quantity $m(P)$
is related to a "half-Mahler" measure of $\tilde P(x,y)=P_{\sqrt{7},1,3}(x,y)$.
In the finale we use the modular parametrization of the elliptic curve $\tilde
P(x,y)=0$, again of conductor 21, due to Ramanujan and the Mellit--Brunault
formula for the regulator of modular units.
|
[{'version': 'v1', 'created': 'Fri, 31 Jul 2015 03:35:34 GMT'}
{'version': 'v2', 'created': 'Wed, 16 Dec 2015 02:24:11 GMT'}]
|
2016-04-05
|
[array(['Lalín', 'Matilde', ''], dtype=object)
array(['Samart', 'Detchat', ''], dtype=object)
array(['Zudilin', 'Wadim', ''], dtype=object)]
|
4,151 |
cond-mat/0309715
|
Christof Wetterich
|
T.Baier, E.Bick, C.Wetterich
|
Temperature dependence of antiferromagnetic order in the Hubbard model
|
New section on critical behavior 31 pages,17 figures
| null |
10.1103/PhysRevB.70.125111
|
HD-THEP-03-35
|
cond-mat.str-el cond-mat.supr-con hep-th
| null |
We suggest a method for an approximative solution of the two dimensional
Hubbard model close to half filling. It is based on partial bosonisation,
supplemented by an investigation of the functional renormalisation group flow.
The inclusion of both the fermionic and bosonic fluctuations leads in lowest
order to agreement with the Hartree-Fock result or Schwinger-Dyson equation and
cures the ambiguity of mean field theory . We compute the temperature
dependence of the antiferromagnetic order parameter and the gap below the
critical temperature. We argue that the Mermin-Wagner theorem is not
practically applicable for the spontaneous breaking of the continuous spin
symmetry in the antiferromagnetic state of the Hubbard model. The long distance
behavior close to and below the critical temperature is governed by the
renormalisation flow for the effective interactions of composite Goldstone
bosons and deviates strongly from the Hartree-Fock result.
|
[{'version': 'v1', 'created': 'Tue, 30 Sep 2003 16:11:04 GMT'}
{'version': 'v2', 'created': 'Wed, 21 Jan 2004 11:32:23 GMT'}]
|
2009-11-10
|
[array(['Baier', 'T.', ''], dtype=object)
array(['Bick', 'E.', ''], dtype=object)
array(['Wetterich', 'C.', ''], dtype=object)]
|
4,152 |
math-ph/0411011
|
Benoit Gr\'ebert
|
D. Bambusi and B. Grebert
|
Birfhoff Normal Form for PDEs with Tame Modulus
| null | null | null | null |
math-ph math.DS math.MP
| null |
We prove an abstract Birkhoff normal form theorem for Hamiltonian Partial
Differential Equations. The theorem applies to semilinear equations with
nonlinearity satisfying a property that we call of Tame Modulus. Such a
property is related to the classical tame inequality by Moser. In the
nonresonant case we deduce that any small amplitude solution remains very close
to a torus for very long times. We also develop a general scheme to apply the
abstract theory to PDEs in one space dimensions and we use it to study some
concrete equations (NLW,NLS) with different boundary conditions. An application
to a nonlinear Schr\"odinger equation on the $d$-dimensional torus is also
given. In all cases we deduce bounds on the growth of high Sobolev norms. In
particular we get lower bounds on the existence time of solutions.
|
[{'version': 'v1', 'created': 'Wed, 3 Nov 2004 14:59:53 GMT'}]
|
2007-05-23
|
[array(['Bambusi', 'D.', ''], dtype=object)
array(['Grebert', 'B.', ''], dtype=object)]
|
4,153 |
1807.06286
|
Tobias Joppen
|
Tobias Joppen, Christian Wirth, and Johannes F\"urnkranz
|
Preference-Based Monte Carlo Tree Search
|
To be published
|
Proceedings of the 41st German Conference on Artificial
Intelligence (KI-18), 2018
|
10.1007/978-3-030-00111-7_28
| null |
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Monte Carlo tree search (MCTS) is a popular choice for solving sequential
anytime problems. However, it depends on a numeric feedback signal, which can
be difficult to define. Real-time MCTS is a variant which may only rarely
encounter states with an explicit, extrinsic reward. To deal with such cases,
the experimenter has to supply an additional numeric feedback signal in the
form of a heuristic, which intrinsically guides the agent. Recent work has
shown evidence that in different areas the underlying structure is ordinal and
not numerical. Hence erroneous and biased heuristics are inevitable, especially
in such domains. In this paper, we propose a MCTS variant which only depends on
qualitative feedback, and therefore opens up new applications for MCTS. We also
find indications that translating absolute into ordinal feedback may be
beneficial. Using a puzzle domain, we show that our preference-based MCTS
variant, wich only receives qualitative feedback, is able to reach a
performance level comparable to a regular MCTS baseline, which obtains
quantitative feedback.
|
[{'version': 'v1', 'created': 'Tue, 17 Jul 2018 09:04:35 GMT'}]
|
2018-09-20
|
[array(['Joppen', 'Tobias', ''], dtype=object)
array(['Wirth', 'Christian', ''], dtype=object)
array(['Fürnkranz', 'Johannes', ''], dtype=object)]
|
4,154 |
quant-ph/0606103
|
Damian Markham
|
Damian Markham, Janet Anders, Vlatko Vedral, Mio Murao and Akimasa
Miyake
|
Survival of entanglement in thermal states
|
6 pages, 2 figures. Changes made in line with publication
recommendations. Motivation and concequences of result clarified, with the
addition of one more example, which applies the result to give noise
thresholds for measurement based quantum computing. New author added with new
results
|
Euro. Phys. Lett. 81, 40006 (2008)
|
10.1209/0295-5075/81/40006
| null |
quant-ph
| null |
We present a general sufficiency condition for the presence of multipartite
entanglement in thermal states stemming from the ground state entanglement. The
condition is written in terms of the ground state entanglement and the
partition function and it gives transition temperatures below which
entanglement is guaranteed to survive. It is flexible and can be easily adapted
to consider entanglement for different splittings, as well as be weakened to
allow easier calculations by approximations. Examples where the condition is
calculated are given. These examples allow us to characterize a minimum gapping
behavior for the survival of entanglement in the thermodynamic limit. Further,
the same technique can be used to find noise thresholds in the generation of
useful resource states for one-way quantum computing.
|
[{'version': 'v1', 'created': 'Tue, 13 Jun 2006 01:59:31 GMT'}
{'version': 'v2', 'created': 'Tue, 12 Feb 2008 15:03:57 GMT'}]
|
2008-02-13
|
[array(['Markham', 'Damian', ''], dtype=object)
array(['Anders', 'Janet', ''], dtype=object)
array(['Vedral', 'Vlatko', ''], dtype=object)
array(['Murao', 'Mio', ''], dtype=object)
array(['Miyake', 'Akimasa', ''], dtype=object)]
|
4,155 |
1605.08752
|
Peter Borg Dr.
|
Peter Borg
|
The maximum product of sizes of cross-intersecting families
|
16 pages
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We say that a set $A$ $t$-intersects a set $B$ if $A$ and $B$ have at least
$t$ common elements. Two families $\mathcal{A}$ and $\mathcal{B}$ of sets are
said to be cross-$t$-intersecting if each set in $\mathcal{A}$ $t$-intersects
each set in $\mathcal{B}$. A subfamily $\mathcal{S}$ of a family $\mathcal{F}$
is called a $t$-star of $\mathcal{F}$ if the sets in $\mathcal{S}$ have $t$
common elements. Let $l(\mathcal{F},t)$ denote the size of a largest $t$-star
of $\mathcal{F}$. We call $\mathcal{F}$ a $(\leq r)$-family if each set in
$\mathcal{F}$ has at most $r$ elements. We determine a function $c :
\mathbb{N}^3 \rightarrow \mathbb{N}$ such that the following holds. If
$\mathcal{A}$ is a subfamily of a $(\leq r)$-family $\mathcal{F}$ with
$l(\mathcal{F},t) \geq c(r,s,t)l(\mathcal{F},t+1)$, $\mathcal{B}$ is a
subfamily of a $(\leq s)$-family $\mathcal{G}$ with $l(\mathcal{G},t) \geq
c(r,s,t)l(\mathcal{G},t+1)$, and $\mathcal{A}$ and $\mathcal{B}$ are
cross-$t$-intersecting, then $|\mathcal{A}||\mathcal{B}| \leq
l(\mathcal{F},t)l(\mathcal{G},t)$. Some known results follow from this, and we
identify several natural classes of families for which the bound is attained.
|
[{'version': 'v1', 'created': 'Fri, 27 May 2016 18:42:57 GMT'}]
|
2016-05-30
|
[array(['Borg', 'Peter', ''], dtype=object)]
|
4,156 |
1401.5545
|
Eyob A. Sete
|
Eyob A. Sete, Jay M. Gambetta, and Alexander N. Korotkov
|
Purcell effect with microwave drive: Suppression of qubit relaxation
rate
|
Published version
|
Phys. Rev. B 89, 104516 (2014)
|
10.1103/PhysRevB.89.104516
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyze the Purcell relaxation rate of a superconducting qubit coupled to
a resonator, which is coupled to a transmission line and pumped by an external
microwave drive. Considering the typical regime of the qubit measurement, we
focus on the case when the qubit frequency is significantly detuned from the
resonator frequency. Surprisingly, the Purcell rate decreases when the strength
of the microwave drive is increased. This suppression becomes significant in
the nonlinear regime. In the presence of the microwave drive, the loss of
photons to the transmission line also causes excitation of the qubit; however,
the excitation rate is typically much smaller than the relaxation rate. Our
analysis also applies to a more general case of a two-level quantum system
coupled to a cavity.
|
[{'version': 'v1', 'created': 'Wed, 22 Jan 2014 02:59:36 GMT'}
{'version': 'v2', 'created': 'Fri, 21 Mar 2014 16:46:32 GMT'}]
|
2014-03-24
|
[array(['Sete', 'Eyob A.', ''], dtype=object)
array(['Gambetta', 'Jay M.', ''], dtype=object)
array(['Korotkov', 'Alexander N.', ''], dtype=object)]
|
4,157 |
1303.4817
|
Alexei Buzulutskov
|
A. Bondar, A. Buzulutskov, A. Dolgov, A. Grebenuk, E. Shemyakina, A.
Sokolov, A. Breskin, D. Thers
|
First demonstration of THGEM/GAPD-matrix optical readout in two-phase
Cryogenic Avalanche Detector in Ar
|
4 pages, 6 figures. Presented at Vienna Conference of Instrumentation
(Feb 15-20, 2013, Vienna, Austria). Submitted to the Proceedings
|
Nucl.Instrum.Meth.A732:213-216,2013
|
10.1016/j.nima.2013.07.089
| null |
physics.ins-det hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The multi-channel optical readout of a THGEM multiplier coupled to a matrix
of 3x3 Geiger-mode APDs (GAPDs) was demonstrated in a two-phase Cryogenic
Avalanche Detector (CRAD) in Ar. The GAPDs recorded THGEM-hole avalanches in
the Near Infrared (NIR). At an avalanche charge gain of 160, the yield of the
combined THGEM/GAPD-matrix multiplier amounted at ~80 photoelectrons per 20 keV
X-ray absorbed in the liquid phase. A spatial resolution of 2.5 mm (FWHM) has
been measured for the impinging X-rays. This technique has potential
applications in coherent neutrino-nucleus scattering and dark matter search
experiments.
|
[{'version': 'v1', 'created': 'Wed, 20 Mar 2013 02:51:15 GMT'}]
|
2014-08-20
|
[array(['Bondar', 'A.', ''], dtype=object)
array(['Buzulutskov', 'A.', ''], dtype=object)
array(['Dolgov', 'A.', ''], dtype=object)
array(['Grebenuk', 'A.', ''], dtype=object)
array(['Shemyakina', 'E.', ''], dtype=object)
array(['Sokolov', 'A.', ''], dtype=object)
array(['Breskin', 'A.', ''], dtype=object)
array(['Thers', 'D.', ''], dtype=object)]
|
4,158 |
2112.10938
|
Phyllipe Lima
|
Phyllipe Lima, Jorge Melegati, Everaldo Gomes, Nathalya Stefhany
Pereira, Eduardo Guerra, Paulo Meirelles
|
CADV: A software visualization approach for code annotations
distribution
|
53 pages
| null |
10.1016/j.infsof.2022.107089
| null |
cs.SE
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Code annotations is a widely used feature in Java systems to configure custom
metadata on programming elements. Their increasing presence creates the need
for approaches to assess and comprehend their usage and distribution. In this
context, software visualization has been studied and researched to improve
program comprehension in different aspects. This study aimed at designing a
software visualization approach that graphically displays how code annotations
are distributed and organized in a software system and developing a tool, as a
reference implementation of the approach, to generate views and interact with
users. We conducted an empirical evaluation through questionnaires and
interviews to evaluate our visualization approach considering four aspects:
effectiveness for program comprehension, perceived usefulness, perceived ease
of use, and suitability for the intended audience. The resulting data was used
to perform a qualitative and quantitative analysis. The tool identifies package
responsibilities providing visual information about their annotations at
different levels. Using the developed tool, the participants achieved a high
correctness rate in the program comprehension tasks and performed very well in
questions about the overview of the system under analysis. Finally,
participants perceived that the tool outperforms existing approaches for code
inspection when searching for information related to code annotations. The
results show that the visualization approach using the developed tool is
effective in program comprehension tasks related to code annotations, which can
also be used to identify responsibilities in the application packages.
Moreover, it was evaluated as suitable for newcomers to overview the usage of
annotations in the system and for architects to perform a deep analysis that
can potentially detect misplaced annotations and abnormal growths on their
usage.
|
[{'version': 'v1', 'created': 'Tue, 21 Dec 2021 02:01:29 GMT'}
{'version': 'v2', 'created': 'Wed, 22 Dec 2021 02:07:43 GMT'}
{'version': 'v3', 'created': 'Mon, 27 Jun 2022 12:58:10 GMT'}]
|
2022-10-14
|
[array(['Lima', 'Phyllipe', ''], dtype=object)
array(['Melegati', 'Jorge', ''], dtype=object)
array(['Gomes', 'Everaldo', ''], dtype=object)
array(['Pereira', 'Nathalya Stefhany', ''], dtype=object)
array(['Guerra', 'Eduardo', ''], dtype=object)
array(['Meirelles', 'Paulo', ''], dtype=object)]
|
4,159 |
1603.07955
|
Danica Draskovic
|
Danica Dra\v{s}kovi\'c, Quentin A. Parker, Warren A. Reid and Milorad
Stupar
|
Discovery of new planetary nebulae in the Small Magellanic Cloud
|
11th Pacific Rim Conference on Stellar Astrophysics - Proceedings
| null |
10.1088/1742-6596/728/7/072008
| null |
astro-ph.GA astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present six new planetary nebulae (PNe) discovered in the Small Magellanic
Cloud (SMC) from deep UK Schmidt telescope (UKST) narrow band Halpha and
broad-band short-red "SR" continuum images and confirmed spectroscopically.
These 6 preliminary discoveries provide a 6% increase to the previously known
SMC PN population of ~100. Once spectroscopic follow-up of all our newly
identified candidates is complete, we expect to increase the total number of
known SMC PNe by up to 50%. This will permit a significant improvement to
determination of the SMC PN luminosity function (PNLF) and enable further
insights into the chemical evolution and kinematics of the SMC PN population.
|
[{'version': 'v1', 'created': 'Wed, 23 Mar 2016 05:28:15 GMT'}]
|
2016-08-24
|
[array(['Drašković', 'Danica', ''], dtype=object)
array(['Parker', 'Quentin A.', ''], dtype=object)
array(['Reid', 'Warren A.', ''], dtype=object)
array(['Stupar', 'Milorad', ''], dtype=object)]
|
4,160 |
1903.08691
|
Hitesh Kumar Sahoo
|
Hitesh Kumar Sahoo, Thor Ansb{\ae}k, Luisa Ottaviano, Elizaveta
Semenova, Fyodor Zubov, Ole Hansen, and Kresten Yvind
|
Tunable MEMS VCSEL on Silicon substrate
| null | null | null | null |
physics.app-ph physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present design, fabrication and characterization of a MEMS VCSEL which
utilizes a silicon-on-insulator wafer for the microelectromechanical system and
encapsulates the MEMS by direct InP wafer bonding, which improves the
protection and control of the tuning element. This procedure enables a more
robust fabrication, a larger free spectral range and facilitates bidirectional
tuning of the MEMS element. The MEMS VCSEL device uses a high contrast grating
mirror on a MEMS stage as the bottom mirror, a wafer bonded InP with quantum
wells for amplification and a deposited dielectric DBR as the top mirror. A 40
nm tuning range and a mechanical resonance frequency in excess of 2 MHz are
demonstrated.
|
[{'version': 'v1', 'created': 'Wed, 20 Mar 2019 18:35:41 GMT'}]
|
2019-03-22
|
[array(['Sahoo', 'Hitesh Kumar', ''], dtype=object)
array(['Ansbæk', 'Thor', ''], dtype=object)
array(['Ottaviano', 'Luisa', ''], dtype=object)
array(['Semenova', 'Elizaveta', ''], dtype=object)
array(['Zubov', 'Fyodor', ''], dtype=object)
array(['Hansen', 'Ole', ''], dtype=object)
array(['Yvind', 'Kresten', ''], dtype=object)]
|
4,161 |
2202.08173
|
Geppino Pucci
|
Enrico Dandolo, Andrea Pietracaprina, Geppino Pucci
|
Distributed k-Means with Outliers in General Metrics
| null | null | null | null |
cs.DC cs.DS cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Center-based clustering is a pivotal primitive for unsupervised learning and
data analysis. A popular variant is undoubtedly the k-means problem, which,
given a set $P$ of points from a metric space and a parameter $k<|P|$, requires
to determine a subset $S$ of $k$ centers minimizing the sum of all squared
distances of points in $P$ from their closest center. A more general
formulation, known as k-means with $z$ outliers, introduced to deal with noisy
datasets, features a further parameter $z$ and allows up to $z$ points of $P$
(outliers) to be disregarded when computing the aforementioned sum. We present
a distributed coreset-based 3-round approximation algorithm for k-means with
$z$ outliers for general metric spaces, using MapReduce as a computational
model. Our distributed algorithm requires sublinear local memory per reducer,
and yields a solution whose approximation ratio is an additive term $O(\gamma)$
away from the one achievable by the best known sequential (possibly bicriteria)
algorithm, where $\gamma$ can be made arbitrarily small. An important feature
of our algorithm is that it obliviously adapts to the intrinsic complexity of
the dataset, captured by the doubling dimension $D$ of the metric space. To the
best of our knowledge, no previous distributed approaches were able to attain
similar quality-performance tradeoffs for general metrics.
|
[{'version': 'v1', 'created': 'Wed, 16 Feb 2022 16:24:31 GMT'}
{'version': 'v2', 'created': 'Fri, 18 Feb 2022 16:56:37 GMT'}]
|
2022-02-21
|
[array(['Dandolo', 'Enrico', ''], dtype=object)
array(['Pietracaprina', 'Andrea', ''], dtype=object)
array(['Pucci', 'Geppino', ''], dtype=object)]
|
4,162 |
cond-mat/0605306
|
Jerome Rech
|
J. Rech, C. Pepin, A. V. Chubukov
|
Quantum critical behavior in itinerant electron systems -- Eliashberg
theory and instability of a ferromagnetic quantum-critical point
|
37 pages, 10 figs
|
Phys. Rev. B 74, 195126 (2006).
|
10.1103/PhysRevB.74.195126
| null |
cond-mat.str-el
| null |
We consider the problem of fermions interacting with gapless long-wavelength
collective bosonic modes. The theory describes, among other cases, a
ferromagnetic quantum-critical point (QCP) and a QCP towards nematic ordering.
We construct a controllable expansion at the QCP in two steps: we first create
a new, non Fermi-liquid ``zero-order'' Eliashberg-type theory, and then
demonstrate that the residual interaction effects are small. We prove that this
approach is justified under two conditions: the interaction should be smaller
than the fermionic bandwidth, and either the band mass $m_B$ should be much
smaller than $m = p_F/v_F$, or the number of fermionic flavors $N$ should be
large. For an SU(2) symmetric ferromagnetic QCP, we find that the Eliashberg
theory itself includes a set of singular renormalizations which can be
understood as a consequence of an effective long-range dynamic interaction
between quasi-particles, generated by the Landau damping term. These singular
renormalizations give rise to a negative non-analytic $q^{3/2}$ correction to
the static spin susceptibility, and destroy a ferromagnetic QCP. We demonstrate
that this effect can be understood in the framework of the $\phi^4$ theory of
quantum criticality. We also show that the non-analytic $q^{3/2}$ correction to
the bosonic propagator is specific to the SU(2) symmetric case. For systems
with a scalar order parameter, the $q^{3/2}$ contributions from individual
diagrams cancel out in the full expression of the susceptibility, and the QCP
remains stable.
|
[{'version': 'v1', 'created': 'Thu, 11 May 2006 15:57:05 GMT'}]
|
2009-11-11
|
[array(['Rech', 'J.', ''], dtype=object)
array(['Pepin', 'C.', ''], dtype=object)
array(['Chubukov', 'A. V.', ''], dtype=object)]
|
4,163 |
hep-ph/0506271
|
Aura Rosca
|
K. Moenig and A. Rosca
|
Two-photon width of the Higgs boson
|
Talk presented at LCWS05, Stanford, March 2005
| null | null | null |
hep-ph
| null |
This study investigates the potential of a photon collider for measuring the
two photon partial width times the branching ratio of a light Higgs boson. The
analysis is based on the reconstruction of the Higgs events produced in the
gamma gamma -> h process, followed by Higgs decay into a b bbar pair. A
statistical error of the measurement of the two-photon width times the b bbar
branching ratio of the Higgs boson is found to be 1.7% with an integrated
luminosity of 80 fb^-1 in the high energy part of the spectrum.
|
[{'version': 'v1', 'created': 'Mon, 27 Jun 2005 11:27:13 GMT'}]
|
2009-09-29
|
[array(['Moenig', 'K.', ''], dtype=object)
array(['Rosca', 'A.', ''], dtype=object)]
|
4,164 |
0803.0643
|
A. K. Chaudhuri
|
A. K. Chaudhuri
|
Multiplicity, mean $p_T$, $p_T$-spectra and elliptic flow of identified
particles in Pb+Pb collisions at LHC
|
6 pages, 8 figures. Revised version. To be published in Physics
Letters B
|
Phys.Lett.B672:126-131,2009
|
10.1016/j.physletb.2008.12.071
| null |
nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Israel-Stewart's causal theory of dissipative hydrodynamics, with the ADS/CFT
lower limit of shear viscosity to entropy ratio ($\eta/s$=0.08), give
consistent description of a number of experimental observables in Au+Au
collisions at RHIC (c.m. energy $\sqrt{s}$=200 GeV) \cite{Chaudhuri:2008sj}.
Assuming that in Pb+Pb collisions at LHC (c.m. energy $\sqrt{s}$=5.5 TeV),
except for the initial temperature, other parameters of the fluid remain
unchanged, we have predicted for the centrality dependence of multiplicity,
mean $p_T$, $p_T$-spectra, elliptic flow. The central temperature of the fluid
is adjusted to $T_i$=421 MeV such that in a Pb+Pb collision, with participant
number $N_{part}$=350, average charge particle multiplicity is $\sim$ 900 and
is consistent with the experimental trend observed at lower energies. Compare
to Au+Au collisions at RHIC, in Pb+Pb collisions at LHC, on the average,
particle multiplicity increases by a factor of $\sim$1.6, the mean $p_T$ is
increased by $\sim$10% only. The elliptic flow on the other hand decreases by
$\sim$15%.
|
[{'version': 'v1', 'created': 'Wed, 5 Mar 2008 12:28:43 GMT'}
{'version': 'v2', 'created': 'Wed, 9 Jul 2008 10:53:57 GMT'}
{'version': 'v3', 'created': 'Thu, 1 Jan 2009 05:54:56 GMT'}]
|
2009-02-12
|
[array(['Chaudhuri', 'A. K.', ''], dtype=object)]
|
4,165 |
1707.07979
|
George A. Gontcharov
|
George Gontcharov
|
Production, Processing and Consumption of the Dust in the Galaxy
|
4 pages, 1 figure, conference proceedings Stars: From Collapse to
Collapse, Proceedings of a conference held at Special Astrophysical
Observatory, Nizhny Arkhyz, Russia 3-7 October 2016. Edited by Yu. Yu.
Balega, D. O. Kudryavtsev, I. I. Romanyuk, and I. A. Yakunin. San Francisco:
Astronomical Society of the Pacific, 2017, p.71
|
Astronomical Society of the Pacific Conference Series, 2017, 510,
71
| null | null |
astro-ph.SR astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The recent results obtained by the modern telescopes and spacecrafts allow us
for the first time to compare directly the mass, spatial density and size
distribution of the dust grains in the regions of their production, processing
and consumption in our Galaxy. The ALMA and VLT/SPHERE telescopes allow us to
estimate the production of the dust by supergiants and collapsing core
supernovae. The 2MASS, WISE, SDSS, Planck and other telescopes allow us to
estimate the processing of the dust in the interstellar medium. After renewed
Besan\c{c}on Galaxy model the medium appears to contain about half the local
mass of matter (both baryonic and dark) in the Galactic neighborhood of the
Sun. The Helios, Ulysses, Galileo, Cassini and New Horizons spacecrafts allow
us to estimate the consumption of the dust into large solid bodies. The results
are consistent each other assuming the local mean spatial density of the dust
is about of $3.5\times10^{-26}$ g/cm$^3$, mean density of the grain is about 1
g/cm$^3$, and the dust production rate is about of 0.015 Solar mass per year
for whole the Galaxy.
|
[{'version': 'v1', 'created': 'Tue, 25 Jul 2017 13:19:44 GMT'}]
|
2017-07-26
|
[array(['Gontcharov', 'George', ''], dtype=object)]
|
4,166 |
1910.08105
|
Matteo Fontana
|
Ilia Nouretdinov, James Gammerman, Matteo Fontana, Daljit Rehal
|
Multi-level conformal clustering: A distribution-free technique for
clustering and anomaly detection
| null | null |
10.1016/j.neucom.2019.07.114
| null |
stat.ML cs.LG stat.ME
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work we present a clustering technique called \textit{multi-level
conformal clustering (MLCC)}. The technique is hierarchical in nature because
it can be performed at multiple significance levels which yields greater
insight into the data than performing it at just one level. We describe the
theoretical underpinnings of MLCC, compare and contrast it with the
hierarchical clustering algorithm, and then apply it to real world datasets to
assess its performance. There are several advantages to using MLCC over more
classical clustering techniques: Once a significance level has been set, MLCC
is able to automatically select the number of clusters. Furthermore, thanks to
the conformal prediction framework the resulting clustering model has a clear
statistical meaning without any assumptions about the distribution of the data.
This statistical robustness also allows us to perform clustering and anomaly
detection simultaneously. Moreover, due to the flexibility of the conformal
prediction framework, our algorithm can be used on top of many other machine
learning algorithms.
|
[{'version': 'v1', 'created': 'Thu, 17 Oct 2019 18:28:56 GMT'}
{'version': 'v2', 'created': 'Mon, 21 Oct 2019 20:03:28 GMT'}]
|
2020-06-25
|
[array(['Nouretdinov', 'Ilia', ''], dtype=object)
array(['Gammerman', 'James', ''], dtype=object)
array(['Fontana', 'Matteo', ''], dtype=object)
array(['Rehal', 'Daljit', ''], dtype=object)]
|
4,167 |
1507.03859
|
Michael McCracken
|
M.E. McCracken, M. Bellis, K.P. Adhikari, D. Adikaram, Z. Akbar, S.
Anefalos Pereira, R.A. Badui, J. Ball, N.A. Baltzell, M. Battaglieri, V.
Batourine, I. Bedlinskiy, A.S. Biselli, S. Boiarinov, W.J. Briscoe, W.K.
Brooks, V.D. Burkert, T. Cao, D.S. Carman, A. Celentano, S. Chandavar, G.
Charles, L. Colaneri, P.L. Cole, M. Contalbrigo, O. Cortes, V. Crede, A.
D'Angelo, N. Dashyan, R. De Vita, E. De Sanctis, A. Deur, C. Djalali, G.E.
Dodge, R. Dupre, A. El Alaoui, L. El Fassi, E. Elouadrhiri, P. Eugenio, G.
Fedotov, S. Fegan, R. Fersch, A. Filippi, J.A. Fleming, B. Garillon, N.
Gevorgyan, G.P. Gilfoyle, K.L. Giovanetti, F.X. Girod, E. Golovatch, R.W.
Gothe, K.A. Griffioen, M. Guidal, L. Guo, K. Hafidi, H. Hakobyan, C.
Hanretty, M. Hattawy, K. Hicks, M. Holtrop, S.M. Hughes, Y. Ilieva, D.G.
Ireland, B.S. Ishkhanov, E.L. Isupov, D. Jenkins, H. Jiang, H.S. Jo, D.
Keller, G. Khachatryan, M. Khandaker, A. Kim, W. Kim, A. Klein, F.J. Klein,
V. Kubarovsky, P. Lenisa, K. Livingston, H.Y. Lu, I.J.D. MacGregor, M. Mayer,
B. McKinnon, M.D. Mestayer, C.A. Meyer, M. Mirazita, V. Mokeev, C.I. Moody,
K. Moriya, C. Munoz Camacho, P. Nadel-Turonski, L.A. Net, S. Niccolai, M.
Osipenko, A.I. Ostrovidov, K. Park, E. Pasyuk, S. Pisano, O. Pogorelko, J.W.
Price, S. Procureur, Y. Prok, B.A. Raue, M. Ripani, A. Rizzo, G. Rosner, P.
Roy, F. Sabati\'e, C. Salgado, R.A. Schumacher, E. Seder, Y.G. Sharabian, Iu.
Skorodumina, D. Sokhan, N. Sparveris, P. Stoler, I.I. Strakovsky, S. Strauch,
V. Sytnik, Ye Tian, M. Ungaro, H. Voskanyan, E. Voutier, N.K. Walford, D.P.
Watts, X. Wei, M.H. Wood, N. Zachariou, L. Zana, J. Zhang, Z.W. Zhao, and I.
Zonta
|
A search for baryon- and lepton-number violating decays of $\Lambda$
hyperons using the CLAS detector at Jefferson Laboratory
|
12 pages, 7 figures (color)
|
Phys. Rev. D 92, 072002 (2015)
|
10.1103/PhysRevD.92.072002
| null |
hep-ex nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a search for ten baryon-number violating decay modes of $\Lambda$
hyperons using the CLAS detector at Jefferson Laboratory. Nine of these decay
modes result in a single meson and single lepton in the final state ($\Lambda
\rightarrow m \ell$) and conserve either the sum or the difference of baryon
and lepton number ($B \pm L$). The tenth decay mode ($\Lambda \rightarrow
\bar{p}\pi^+$) represents a difference in baryon number of two units and no
difference in lepton number. We observe no significant signal and set upper
limits on the branching fractions of these reactions in the range
$(4-200)\times 10^{-7}$ at the $90\%$ confidence level.
|
[{'version': 'v1', 'created': 'Tue, 14 Jul 2015 14:21:08 GMT'}]
|
2016-08-08
|
[array(['McCracken', 'M. E.', ''], dtype=object)
array(['Bellis', 'M.', ''], dtype=object)
array(['Adhikari', 'K. P.', ''], dtype=object)
array(['Adikaram', 'D.', ''], dtype=object)
array(['Akbar', 'Z.', ''], dtype=object)
array(['Pereira', 'S. Anefalos', ''], dtype=object)
array(['Badui', 'R. A.', ''], dtype=object)
array(['Ball', 'J.', ''], dtype=object)
array(['Baltzell', 'N. A.', ''], dtype=object)
array(['Battaglieri', 'M.', ''], dtype=object)
array(['Batourine', 'V.', ''], dtype=object)
array(['Bedlinskiy', 'I.', ''], dtype=object)
array(['Biselli', 'A. S.', ''], dtype=object)
array(['Boiarinov', 'S.', ''], dtype=object)
array(['Briscoe', 'W. J.', ''], dtype=object)
array(['Brooks', 'W. K.', ''], dtype=object)
array(['Burkert', 'V. D.', ''], dtype=object)
array(['Cao', 'T.', ''], dtype=object)
array(['Carman', 'D. S.', ''], dtype=object)
array(['Celentano', 'A.', ''], dtype=object)
array(['Chandavar', 'S.', ''], dtype=object)
array(['Charles', 'G.', ''], dtype=object)
array(['Colaneri', 'L.', ''], dtype=object)
array(['Cole', 'P. L.', ''], dtype=object)
array(['Contalbrigo', 'M.', ''], dtype=object)
array(['Cortes', 'O.', ''], dtype=object)
array(['Crede', 'V.', ''], dtype=object)
array(["D'Angelo", 'A.', ''], dtype=object)
array(['Dashyan', 'N.', ''], dtype=object)
array(['De Vita', 'R.', ''], dtype=object)
array(['De Sanctis', 'E.', ''], dtype=object)
array(['Deur', 'A.', ''], dtype=object)
array(['Djalali', 'C.', ''], dtype=object)
array(['Dodge', 'G. E.', ''], dtype=object)
array(['Dupre', 'R.', ''], dtype=object)
array(['Alaoui', 'A. El', ''], dtype=object)
array(['Fassi', 'L. El', ''], dtype=object)
array(['Elouadrhiri', 'E.', ''], dtype=object)
array(['Eugenio', 'P.', ''], dtype=object)
array(['Fedotov', 'G.', ''], dtype=object)
array(['Fegan', 'S.', ''], dtype=object)
array(['Fersch', 'R.', ''], dtype=object)
array(['Filippi', 'A.', ''], dtype=object)
array(['Fleming', 'J. A.', ''], dtype=object)
array(['Garillon', 'B.', ''], dtype=object)
array(['Gevorgyan', 'N.', ''], dtype=object)
array(['Gilfoyle', 'G. P.', ''], dtype=object)
array(['Giovanetti', 'K. L.', ''], dtype=object)
array(['Girod', 'F. X.', ''], dtype=object)
array(['Golovatch', 'E.', ''], dtype=object)
array(['Gothe', 'R. W.', ''], dtype=object)
array(['Griffioen', 'K. A.', ''], dtype=object)
array(['Guidal', 'M.', ''], dtype=object)
array(['Guo', 'L.', ''], dtype=object)
array(['Hafidi', 'K.', ''], dtype=object)
array(['Hakobyan', 'H.', ''], dtype=object)
array(['Hanretty', 'C.', ''], dtype=object)
array(['Hattawy', 'M.', ''], dtype=object)
array(['Hicks', 'K.', ''], dtype=object)
array(['Holtrop', 'M.', ''], dtype=object)
array(['Hughes', 'S. M.', ''], dtype=object)
array(['Ilieva', 'Y.', ''], dtype=object)
array(['Ireland', 'D. G.', ''], dtype=object)
array(['Ishkhanov', 'B. S.', ''], dtype=object)
array(['Isupov', 'E. L.', ''], dtype=object)
array(['Jenkins', 'D.', ''], dtype=object)
array(['Jiang', 'H.', ''], dtype=object)
array(['Jo', 'H. S.', ''], dtype=object)
array(['Keller', 'D.', ''], dtype=object)
array(['Khachatryan', 'G.', ''], dtype=object)
array(['Khandaker', 'M.', ''], dtype=object)
array(['Kim', 'A.', ''], dtype=object)
array(['Kim', 'W.', ''], dtype=object)
array(['Klein', 'A.', ''], dtype=object)
array(['Klein', 'F. J.', ''], dtype=object)
array(['Kubarovsky', 'V.', ''], dtype=object)
array(['Lenisa', 'P.', ''], dtype=object)
array(['Livingston', 'K.', ''], dtype=object)
array(['Lu', 'H. Y.', ''], dtype=object)
array(['MacGregor', 'I. J. D.', ''], dtype=object)
array(['Mayer', 'M.', ''], dtype=object)
array(['McKinnon', 'B.', ''], dtype=object)
array(['Mestayer', 'M. D.', ''], dtype=object)
array(['Meyer', 'C. A.', ''], dtype=object)
array(['Mirazita', 'M.', ''], dtype=object)
array(['Mokeev', 'V.', ''], dtype=object)
array(['Moody', 'C. I.', ''], dtype=object)
array(['Moriya', 'K.', ''], dtype=object)
array(['Camacho', 'C. Munoz', ''], dtype=object)
array(['Nadel-Turonski', 'P.', ''], dtype=object)
array(['Net', 'L. A.', ''], dtype=object)
array(['Niccolai', 'S.', ''], dtype=object)
array(['Osipenko', 'M.', ''], dtype=object)
array(['Ostrovidov', 'A. I.', ''], dtype=object)
array(['Park', 'K.', ''], dtype=object)
array(['Pasyuk', 'E.', ''], dtype=object)
array(['Pisano', 'S.', ''], dtype=object)
array(['Pogorelko', 'O.', ''], dtype=object)
array(['Price', 'J. W.', ''], dtype=object)
array(['Procureur', 'S.', ''], dtype=object)
array(['Prok', 'Y.', ''], dtype=object)
array(['Raue', 'B. A.', ''], dtype=object)
array(['Ripani', 'M.', ''], dtype=object)
array(['Rizzo', 'A.', ''], dtype=object)
array(['Rosner', 'G.', ''], dtype=object)
array(['Roy', 'P.', ''], dtype=object)
array(['Sabatié', 'F.', ''], dtype=object)
array(['Salgado', 'C.', ''], dtype=object)
array(['Schumacher', 'R. A.', ''], dtype=object)
array(['Seder', 'E.', ''], dtype=object)
array(['Sharabian', 'Y. G.', ''], dtype=object)
array(['Skorodumina', 'Iu.', ''], dtype=object)
array(['Sokhan', 'D.', ''], dtype=object)
array(['Sparveris', 'N.', ''], dtype=object)
array(['Stoler', 'P.', ''], dtype=object)
array(['Strakovsky', 'I. I.', ''], dtype=object)
array(['Strauch', 'S.', ''], dtype=object)
array(['Sytnik', 'V.', ''], dtype=object)
array(['Tian', 'Ye', ''], dtype=object)
array(['Ungaro', 'M.', ''], dtype=object)
array(['Voskanyan', 'H.', ''], dtype=object)
array(['Voutier', 'E.', ''], dtype=object)
array(['Walford', 'N. K.', ''], dtype=object)
array(['Watts', 'D. P.', ''], dtype=object)
array(['Wei', 'X.', ''], dtype=object)
array(['Wood', 'M. H.', ''], dtype=object)
array(['Zachariou', 'N.', ''], dtype=object)
array(['Zana', 'L.', ''], dtype=object)
array(['Zhang', 'J.', ''], dtype=object)
array(['Zhao', 'Z. W.', ''], dtype=object)
array(['Zonta', 'I.', ''], dtype=object)]
|
4,168 |
1812.02531
|
Min Li
|
Min Li and Chengming Huang
|
Compensated projected Euler method for stochastic differential equations
with jumps under global monotonicity condition
|
there are some mistakes. I need to correct them
| null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper presents and analyzes the compensated projected Euler-Maruyama
method for stochastic differential equations with jumps under a global
monotonicity condition. Compared with existing conditions, this condition
allows the jump-diffusion coefficient to be growth superlinearly. Moreover, the
method is proved to be convergent with strongly order $\frac{1}{2}$ on the
discrete time level. Finally, some numerical experiments are carried out to
confirm the theoretical results.
|
[{'version': 'v1', 'created': 'Thu, 6 Dec 2018 14:06:57 GMT'}
{'version': 'v2', 'created': 'Mon, 10 Dec 2018 01:19:01 GMT'}]
|
2018-12-11
|
[array(['Li', 'Min', ''], dtype=object)
array(['Huang', 'Chengming', ''], dtype=object)]
|
4,169 |
0905.3724
|
Jonathan Breuer
|
Jonathan Breuer, Eric Ryckman, Barry Simon
|
Equality of the Spectral and Dynamical Definitions of Reflection
| null | null |
10.1007/s00220-009-0945-7
| null |
math-ph math.MP math.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For full-line Jacobi matrices, Schr\"odinger operators, and CMV matrices, we
show that being reflectionless, in the sense of the well-known property of
$m$-functions, is equivalent to a lack of reflection in the dynamics in the
sense that any state that goes entirely to $x=-\infty$ as $t\to -\infty $ goes
entirely to $x=\infty$ as $t\to\infty$. This allows us to settle a conjecture
of Deift and Simon from 1983 regarding ergodic Jacobi matrices.
|
[{'version': 'v1', 'created': 'Fri, 22 May 2009 17:02:54 GMT'}]
|
2015-05-13
|
[array(['Breuer', 'Jonathan', ''], dtype=object)
array(['Ryckman', 'Eric', ''], dtype=object)
array(['Simon', 'Barry', ''], dtype=object)]
|
4,170 |
2210.12965
|
Johannes Ackermann
|
Johannes Ackermann, Minjun Li
|
High-Resolution Image Editing via Multi-Stage Blended Diffusion
|
Machine Learning for Creativity and Design Workshop at NeurIPS 2022
| null | null | null |
cs.CV cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Diffusion models have shown great results in image generation and in image
editing. However, current approaches are limited to low resolutions due to the
computational cost of training diffusion models for high-resolution generation.
We propose an approach that uses a pre-trained low-resolution diffusion model
to edit images in the megapixel range. We first use Blended Diffusion to edit
the image at a low resolution, and then upscale it in multiple stages, using a
super-resolution model and Blended Diffusion. Using our approach, we achieve
higher visual fidelity than by only applying off the shelf super-resolution
methods to the output of the diffusion model. We also obtain better global
consistency than directly using the diffusion model at a higher resolution.
|
[{'version': 'v1', 'created': 'Mon, 24 Oct 2022 06:07:35 GMT'}]
|
2022-10-25
|
[array(['Ackermann', 'Johannes', ''], dtype=object)
array(['Li', 'Minjun', ''], dtype=object)]
|
4,171 |
2302.13214
|
Zhao Song
|
Josh Alman, Zhao Song
|
Fast Attention Requires Bounded Entries
| null | null | null | null |
cs.LG cs.CC cs.DS stat.ML
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
In modern machine learning, inner product attention computation is a
fundamental task for training large language models such as Transformer, GPT-1,
BERT, GPT-2, GPT-3 and ChatGPT. Formally, in this problem, one is given as
input three matrices $Q, K, V \in [-B,B]^{n \times d}$, and the goal is to
construct the matrix $\mathrm{Att}(Q,K,V) := \mathrm{diag}(A {\bf 1}_n)^{-1} A
V \in \mathbb{R}^{n \times d}$, where $A = \exp(QK^\top/d)$ is the `attention
matrix', and $\exp$ is applied entry-wise. Straightforward methods for this
problem explicitly compute the $n \times n$ attention matrix $A$, and hence
require time $\Omega(n^2)$ even when $d = n^{o(1)}$ is small.
In this paper, we investigate whether faster algorithms are possible by
implicitly making use of the matrix $A$. We present two results, showing that
there is a sharp transition at $B = \Theta(\sqrt{\log n})$.
$\bullet$ If $d = O(\log n)$ and $B = o(\sqrt{\log n})$, there is an
$n^{1+o(1)}$ time algorithm to approximate $\mathrm{Att}(Q,K,V)$ up to
$1/\mathrm{poly}(n)$ additive error.
$\bullet$ If $d = O(\log n)$ and $B = \Theta (\sqrt{\log n})$, assuming the
Strong Exponential Time Hypothesis from fine-grained complexity theory, it is
impossible to approximate $\mathrm{Att}(Q,K,V)$ up to $1/\mathrm{poly}(n)$
additive error in truly subquadratic time $n^{2 - \Omega(1)}$.
This gives a theoretical explanation for the phenomenon observed in practice
that attention computation is much more efficient when the input matrices have
smaller entries.
|
[{'version': 'v1', 'created': 'Sun, 26 Feb 2023 02:42:39 GMT'}
{'version': 'v2', 'created': 'Tue, 9 May 2023 20:03:04 GMT'}]
|
2023-05-11
|
[array(['Alman', 'Josh', ''], dtype=object)
array(['Song', 'Zhao', ''], dtype=object)]
|
4,172 |
chao-dyn/9611003
|
Daniel Braun
|
D. Braun, M. Kus and K. Zyczkowski
|
Time-reversal symmetry and random polynomials
|
4 RevTex pages, 3 Postscript figures
|
J.Phys.A: Math.Gen. 30 (1997), L117-L123
|
10.1088/0305-4470/30/6/002
|
ranpol1196
|
chao-dyn cond-mat.mes-hall nlin.CD
| null |
We analyze the density of roots of random polynomials where each complex
coefficient is constructed of a random modulus and a fixed, deterministic
phase. The density of roots is shown to possess a singular component only in
the case for which the phases increase linearly with the index of coefficients.
This means that, contrary to earlier belief, eigenvectors of a typical quantum
chaotic system with some antiunitary symmetry will not display a clustering
curve in the stellar representation. Moreover, a class of time-reverse
invariant quantum systems is shown, for which spectra display fluctuations
characteristic of orthogonal ensemble, while eigenvectors confer to predictions
of unitary ensemble.
|
[{'version': 'v1', 'created': 'Wed, 6 Nov 1996 14:33:45 GMT'}]
|
2016-08-31
|
[array(['Braun', 'D.', ''], dtype=object)
array(['Kus', 'M.', ''], dtype=object)
array(['Zyczkowski', 'K.', ''], dtype=object)]
|
4,173 |
1504.06174
|
Felipe Navarete
|
Felipe Navarete, Augusto Damineli, Cassio L. Barbosa, Robert D. Blum
|
A Survey of Extended H$_2$ Emission from Massive YSOs
|
to appear on MNRAS. 18 pages, 86 figures and supplementary data
available at CDS
| null |
10.1093/mnras/stv914
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the results from a survey, designed to investigate the accretion
process of massive young stellar objects (MYSOs) through near infrared narrow
band imaging using the H$_2$ $\nu$=1-0 S(1) transition filter. A sample of 353
Massive Young Stellar Object (MYSO) candidates was selected from the Red MSX
Source survey using photometric criteria at longer wavelengths (infrared and
submillimeter) and chosen with positions throughout the Galactic Plane. Our
survey was carried out at the SOAR Telescope in Chile and CFHT in Hawaii
covering both hemispheres. The data reveal that extended H$_2$ emission is a
good tracer of outflow activity, which is a signpost of accretion process on
young massive stars. Almost half of the sample exhibit extended H$_2$ emission
and 74 sources (21\%) have polar morphology, suggesting collimated outflows.
The polar-like structures are more likely to appear on radio-quiet sources,
indicating these structures occur during the pre-UCHII phase. We also found an
important fraction of sources associated with fluorescent H$_2$ diffuse
emission that could be due to a more evolved phase. The images also indicate
only $\sim$23\% (80) of the sample is associated with extant (young) stellar
clusters. These results support the scenario in which massive stars are formed
by accretion disks, since the merging of low mass stars would not produce
outflow structures.
|
[{'version': 'v1', 'created': 'Thu, 23 Apr 2015 13:29:35 GMT'}]
|
2015-10-02
|
[array(['Navarete', 'Felipe', ''], dtype=object)
array(['Damineli', 'Augusto', ''], dtype=object)
array(['Barbosa', 'Cassio L.', ''], dtype=object)
array(['Blum', 'Robert D.', ''], dtype=object)]
|
4,174 |
quant-ph/0206067
|
Terry Rudolph
|
Terry Rudolph, Itay Yavin and Helen Freedhoff
|
Complete eigenstates of identical qubits arranged in regular polygons
|
Added a figure showing how these results can be used to compute
deviations from "equal collective decoherence" approximations
|
Phys. Rev. A, 69, 013815 (2004)
|
10.1103/PhysRevA.69.013815
| null |
quant-ph
| null |
We calculate the energy eigenvalues and eigenstates corresponding to coherent
single and multiple excitations of an array of N identical qubits or two-level
atoms (TLA's) arranged on the vertices of a regular polygon. We assume only
that the coupling occurs via an exchange interaction which depends on the
separation between the qubits. We include the interactions between all pairs of
qubits, and our results are valid for arbitrary distances relative to the
radiation wavelength. To illustrate the usefulness of these states, we plot the
distance dependence of the decay rates of the n=2 (biexciton) eigenstates of an
array of 4 qubits, and tabulate the biexciton eigenvalues and eigenstates, and
absorption frequencies, line widths, and relative intensities for polygons
consisting of N=2,...,9 qubits in the long-wavelength limit.
|
[{'version': 'v1', 'created': 'Tue, 11 Jun 2002 16:09:14 GMT'}
{'version': 'v2', 'created': 'Wed, 13 Nov 2002 20:17:22 GMT'}]
|
2009-11-07
|
[array(['Rudolph', 'Terry', ''], dtype=object)
array(['Yavin', 'Itay', ''], dtype=object)
array(['Freedhoff', 'Helen', ''], dtype=object)]
|
4,175 |
1802.02524
|
Johannes Henn
|
Robin Br\"user, Simon Caron-Huot, Johannes M. Henn
|
Subleading Regge limit from a soft anomalous dimension
|
19 pages, several appendices, many figures
| null |
10.1007/JHEP04(2018)047
|
MITP/18-004
|
hep-th hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Wilson lines capture important features of scattering amplitudes, for example
soft effects relevant for infrared divergences, and the Regge limit. Beyond the
leading power approximation, corrections to the eikonal picture have to be
taken into account. In this paper, we study such corrections in a model of
massive scattering amplitudes in N = 4 super Yang-Mills, in the planar limit,
where the mass is generated through a Higgs mechanism. Using known three-loop
analytic expressions for the scattering amplitude, we find that the first power
suppressed term has a very simple form, equal to a single power law. We propose
that its exponent is governed by the anomalous dimension of a Wilson loop with
a scalar inserted at the cusp, and we provide perturbative evidence for this
proposal. We also analyze other limits of the amplitude and conjecture an exact
formula for a total cross-section at high energies.
|
[{'version': 'v1', 'created': 'Wed, 7 Feb 2018 17:10:00 GMT'}]
|
2018-05-23
|
[array(['Brüser', 'Robin', ''], dtype=object)
array(['Caron-Huot', 'Simon', ''], dtype=object)
array(['Henn', 'Johannes M.', ''], dtype=object)]
|
4,176 |
1610.08547
|
Jordan Keller
|
Pei-Ken Hung and Jordan Keller
|
Linear stability of Schwarzschild spacetime subject to axial
perturbations
|
38 pages
| null | null | null |
math.DG gr-qc math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we address the issue of linear stability of Schwarzschild
space- time subject to certain axisymmetric perturbations. In particular, we
prove that associ- ated solutions to the linearized vacuum Einstein equations
centered at a Schwarzschild metric, with suitably regular initial data, decay
to a linearized Kerr metric. Our method employs a complex line bundle
interpretation applied to a connection-level object, allow- ing for direct
analysis of this connection-level object by the linearized Einstein equations,
in contrast with the recent breakthrough of Dafermos-Holzegel-Rodnianski.
|
[{'version': 'v1', 'created': 'Wed, 26 Oct 2016 21:05:29 GMT'}
{'version': 'v2', 'created': 'Fri, 28 Oct 2016 22:50:47 GMT'}]
|
2017-02-10
|
[array(['Hung', 'Pei-Ken', ''], dtype=object)
array(['Keller', 'Jordan', ''], dtype=object)]
|
4,177 |
2108.05305
|
Hong-Yu Zhou
|
Hong-Yu Zhou, Chixiang Lu, Sibei Yang, Yizhou Yu
|
ConvNets vs. Transformers: Whose Visual Representations are More
Transferable?
|
Accepted to appear in ICCV workshop on Multi-Task Learning in
Computer Vision (DeepMTL)
| null | null | null |
cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
Vision transformers have attracted much attention from computer vision
researchers as they are not restricted to the spatial inductive bias of
ConvNets. However, although Transformer-based backbones have achieved much
progress on ImageNet classification, it is still unclear whether the learned
representations are as transferable as or even more transferable than ConvNets'
features. To address this point, we systematically investigate the transfer
learning ability of ConvNets and vision transformers in 15 single-task and
multi-task performance evaluations. Given the strong correlation between the
performance of pre-trained models and transfer learning, we include 2 residual
ConvNets (i.e., R-101x3 and R-152x4) and 3 Transformer-based visual backbones
(i.e., ViT-B, ViT-L and Swin-B), which have close error rates on ImageNet, that
indicate similar transfer learning performance on downstream datasets.
We observe consistent advantages of Transformer-based backbones on 13
downstream tasks (out of 15), including but not limited to fine-grained
classification, scene recognition (classification, segmentation and depth
estimation), open-domain classification, face recognition, etc. More
specifically, we find that two ViT models heavily rely on whole network
fine-tuning to achieve performance gains while Swin Transformer does not have
such a requirement. Moreover, vision transformers behave more robustly in
multi-task learning, i.e., bringing more improvements when managing mutually
beneficial tasks and reducing performance losses when tackling irrelevant
tasks. We hope our discoveries can facilitate the exploration and exploitation
of vision transformers in the future.
|
[{'version': 'v1', 'created': 'Wed, 11 Aug 2021 16:20:38 GMT'}
{'version': 'v2', 'created': 'Tue, 17 Aug 2021 04:53:18 GMT'}]
|
2021-08-18
|
[array(['Zhou', 'Hong-Yu', ''], dtype=object)
array(['Lu', 'Chixiang', ''], dtype=object)
array(['Yang', 'Sibei', ''], dtype=object)
array(['Yu', 'Yizhou', ''], dtype=object)]
|
4,178 |
1901.03137
|
Yu-Pin Hsu
|
Yi-Hsuan Tseng and Yu-Pin Hsu
|
Online Energy-Efficient Scheduling for Timely Information Downloads in
Mobile Networks
|
10 pages, technical report for the ISIT 2019 paper
| null | null | null |
cs.NI cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a mobile network where a mobile device is running an application
that requires timely information. The information at the device can be updated
by downloading the latest information through neighboring access points. The
freshness of the information at the device is characterized by the recently
proposed age of information. However, minimizing the age of information by
frequent downloading increases power consumption of the device. In this
context, an energy-efficient scheduling algorithm for timely information
downloads is critical, especially for power-limited mobile devices. Moreover,
unpredictable movement of the mobile device causes uncertainty of the channel
dynamics, which is even non-stationary within a finite amount of time for
running the application. Thus, in this paper we devise a randomized online
scheduling algorithm for mobile devices, which can move arbitrarily and run the
application for any amount of time. We show that the expected total cost
incurred by the proposed algorithm, including an age cost and a downloading
cost, is (asymptotically) at most e/(e-1) ~ 1.58 times the minimum total cost
achieved by an optimal offline scheduling algorithm.
|
[{'version': 'v1', 'created': 'Thu, 10 Jan 2019 13:05:18 GMT'}
{'version': 'v2', 'created': 'Sun, 13 Jan 2019 14:22:51 GMT'}
{'version': 'v3', 'created': 'Wed, 16 Jan 2019 10:09:43 GMT'}
{'version': 'v4', 'created': 'Mon, 29 Apr 2019 01:18:51 GMT'}
{'version': 'v5', 'created': 'Tue, 30 Apr 2019 08:58:04 GMT'}]
|
2019-05-01
|
[array(['Tseng', 'Yi-Hsuan', ''], dtype=object)
array(['Hsu', 'Yu-Pin', ''], dtype=object)]
|
4,179 |
0907.4768
|
Assa Auerbach
|
Alexander Mihlin and Assa Auerbach
|
Temperature Dependence Of Cuprate Superconductors' Order Parameter
|
9 pages, 5 figures
|
Phys. Rev. B 80, 134521 (2009).
| null | null |
cond-mat.supr-con cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A model of charged hole-pair bosons, with long range Coulomb interactions and
very weak interlayer coupling, is used to calculate the order parameter -Phi-
of underdoped cuprates. Model parameters are extracted from experimental
superfluid densities and plasma frequencies. The temperature dependence
-Phi(T)- is characterized by a 'trapezoidal' shape. At low temperatures, it
declines slowly due to harmonic phase fluctuations which are suppressed by
anisotropic plasma gaps. Above the single layer Berezinski-Kosterlitz-Thouless
(BKT) temperature, Phi(T) falls rapidly toward the three dimensional transition
temperature. The theoretical curves are compared to c-axis superfluid density
data by H. Kitano et al., (J. Low Temp. Phys. 117, 1241 (1999)) and to the
-transverse nodal velocity- measured by angular resolved photoemmission spectra
on BSCCO samples by W.S. Lee et al., (Nature 450, 81 (2007)), and by A.
Kanigel, et al., (Phys. Rev. Lett. 99, 157001 (2007)).
|
[{'version': 'v1', 'created': 'Mon, 27 Jul 2009 20:57:30 GMT'}]
|
2010-01-12
|
[array(['Mihlin', 'Alexander', ''], dtype=object)
array(['Auerbach', 'Assa', ''], dtype=object)]
|
4,180 |
1301.6401
|
Christoph Karrasch
|
C. Karrasch, J. Hauschild, S. Langer, F. Heidrich-Meisner
|
The Drude weight of the spin-1/2 XXZ chain: density matrix
renormalization group versus exact diagonalization
|
Revised version, additional ED and DMRG data for negative Delta, DMRG
data for lower temperatures, discussion of Benz et al. 2005 corrected
|
PRB 87, 245128 (2013)
|
10.1103/PhysRevB.87.245128
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We revisit the problem of the spin Drude weight D of the integrable spin-1/2
XXZ chain using two complementrary approaches, exact diagonalization (ED) and
the time-dependent density-matrix renormalization group (tDMRG). We pursue two
main goals. First, we present extensive results for the temperature dependence
of D. By exploiting time translation invariance within tDMRG, one can extract D
for significantly lower temperatures than in previous tDMRG studies. Second, we
discuss the numerical quality of the tDMRG data and elaborate on details of the
finite-size scaling of the ED results, comparing calculations carried out in
the canonical and grand-canonical ensembles. Furthermore, we analyze the
behavior of the Drude weight as the point with SU(2)-symmetric exchange is
approached and discuss the relative contribution of the Drude weight to the sum
rule as a function of temperature.
|
[{'version': 'v1', 'created': 'Sun, 27 Jan 2013 20:54:24 GMT'}
{'version': 'v2', 'created': 'Wed, 12 Jun 2013 17:28:09 GMT'}]
|
2015-06-12
|
[array(['Karrasch', 'C.', ''], dtype=object)
array(['Hauschild', 'J.', ''], dtype=object)
array(['Langer', 'S.', ''], dtype=object)
array(['Heidrich-Meisner', 'F.', ''], dtype=object)]
|
4,181 |
1709.09616
|
Kai Zheng
|
Kai Zheng
|
Geodesics in the space of Kahler cone metrics, II. Uniqueness of
constant scalar curvature Kahler cone metrics
|
70 pages
|
Comm. Pure Appl. Math. 72 (2019), no. 12, 2621-2701
|
10.1002/cpa.21869
| null |
math.DG math.AP math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This is a continuation of the previous articles on Kahler cone metrics. In
this article, we introduce weighted function spaces and provide a
self-contained treatment on cone angles in the whole interval $(0,1]$. We first
construct geodesics in the space of Kahler cone metrics (cone geodesics). We
next determine the very detailed asymptotic behaviour of constant scalar
curvature Kahler (cscK) cone metrics, which leads to the reductivity of the
automorphism group. Then we establish the linear theory for the Lichnerowicz
operator, which immediately implies the openness of the path deforming the cone
angles of cscK cone metrics. Finally, we address the problem on the uniqueness
of cscK cone metrics and show that the cscK cone metric is unique up to
automorphisms.
|
[{'version': 'v1', 'created': 'Wed, 27 Sep 2017 16:45:06 GMT'}]
|
2019-11-21
|
[array(['Zheng', 'Kai', ''], dtype=object)]
|
4,182 |
1209.1375
|
Eugene M. Chudnovsky
|
Ricardo Zarzuela, Eugene Chudnovsky, and Javier Tejada
|
Excitation modes of vortices in sub-micron magnetic disks
|
12 pages
| null |
10.1103/PhysRevB.87.014413
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Classical and quantum theory of spin waves in the vortex state of a
mesoscopic sub-micron magnetic disk has been developed with account of the
finite mass density of the vortex. Oscillations of the vortex core resemble
oscillations of a charged string in a potential well in the presence of the
magnetic field. Conventional gyroscopic frequency appears as a gap in the
spectrum of spin waves of the vortex. The mass of the vortex has been computed
that agrees with experimental findings. Finite vortex mass generates a
high-frequency branch of spin waves. Effects of the external magnetic field and
dissipation have been addressed.
|
[{'version': 'v1', 'created': 'Thu, 6 Sep 2012 19:15:49 GMT'}]
|
2015-06-11
|
[array(['Zarzuela', 'Ricardo', ''], dtype=object)
array(['Chudnovsky', 'Eugene', ''], dtype=object)
array(['Tejada', 'Javier', ''], dtype=object)]
|
4,183 |
0805.4730
|
Mauro Fabrizio
|
Mauro Fabrizio
|
Superfluidity and vortices: A Ginzburg-Landau model
| null | null | null | null |
cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The paper deals with the study of superfluidity by a Ginzburg-Landau model
that investigates the material by a second order phase transition, in which any
particle has simultaneouly a normal and superfluid motion. This pattern is able
to describe the classical effects of superfluidity as the phase diagram, the
vortices, the second sound and the thermomechanical effect. Finally, the
vorticities and turbulence are described by an extension of the model in which
the material time derivative is used
|
[{'version': 'v1', 'created': 'Fri, 30 May 2008 11:48:16 GMT'}]
|
2008-06-02
|
[array(['Fabrizio', 'Mauro', ''], dtype=object)]
|
4,184 |
cond-mat/0204293
|
Charles Stafford
|
C. A. Stafford
|
Metal Nanowires: Quantum Transport, Cohesion, and Stability
|
8 pages, 5 postscript figures, lectures given at Pan-American
Advanced Studies Institute on Physics and Technology at the Nanometer Scale
|
Phys. Stat. Sol. (b), vol. 230, p. 481 (2002)
|
10.1002/1521-3951(200204)230:2<481::AID-PSSB481>3.0.CO;2-M
| null |
cond-mat.mes-hall cond-mat.mtrl-sci
| null |
Metal nanowires exhibit a number of interesting properties: their electrical
conductance is quantized, their shot-noise is suppressed by the Pauli
principle, and they are remarkably strong and stable. We show that many of
these properties can be understood quantitatively using a nanoscale
generalization of the free-electron model. Possible technological applications
of nanowires are also discussed.
|
[{'version': 'v1', 'created': 'Sat, 13 Apr 2002 05:21:13 GMT'}]
|
2015-06-24
|
[array(['Stafford', 'C. A.', ''], dtype=object)]
|
4,185 |
astro-ph/0502087
|
Victor Oknyanskij
|
V.L. Oknyanskij
|
QSO 0957+561 and other large-separated double quasars: some new results
and a future observational project
|
9 pages
| null | null | null |
astro-ph
| null |
We collected from literature the information about large-separated pairs of
QSOs, which however once were suspected as gravitationally lensed system. We
discuss some new results on time delay determinations including optical-radio
correlations for QSO 0957+561. We considered some possible observational
effects of gravitational lensing by a cosmic string. A future international
project for observations of the gravitational lens system UM425 is briefly
discussed.
|
[{'version': 'v1', 'created': 'Fri, 4 Feb 2005 06:55:45 GMT'}
{'version': 'v2', 'created': 'Mon, 14 Feb 2005 15:19:07 GMT'}]
|
2007-05-23
|
[array(['Oknyanskij', 'V. L.', ''], dtype=object)]
|
4,186 |
1603.08315
|
Ziwei Zhu
|
Jianqing Fan, Weichen Wang, Ziwei Zhu
|
A Shrinkage Principle for Heavy-Tailed Data: High-Dimensional Robust
Low-Rank Matrix Recovery
|
57 pages
| null | null | null |
math.ST stat.ME stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper introduces a simple principle for robust high-dimensional
statistical inference via an appropriate shrinkage on the data. This widens the
scope of high-dimensional techniques, reducing the moment conditions from
sub-exponential or sub-Gaussian distributions to merely bounded second or
fourth moment. As an illustration of this principle, we focus on robust
estimation of the low-rank matrix $\Theta^*$ from the trace regression model
$Y=Tr (\Theta^{*T}X) +\epsilon$. It encompasses four popular problems: sparse
linear models, compressed sensing, matrix completion and multi-task regression.
We propose to apply penalized least-squares approach to appropriately truncated
or shrunk data. Under only bounded $2+\delta$ moment condition on the response,
the proposed robust methodology yields an estimator that possesses the same
statistical error rates as previous literature with sub-Gaussian errors. For
sparse linear models and multi-tasking regression, we further allow the design
to have only bounded fourth moment and obtain the same statistical rates,
again, by appropriate shrinkage of the design matrix. As a byproduct, we give a
robust covariance matrix estimator and establish its concentration inequality
in terms of the spectral norm when the random samples have only bounded fourth
moment. Extensive simulations have been carried out to support our theories.
|
[{'version': 'v1', 'created': 'Mon, 28 Mar 2016 05:36:59 GMT'}
{'version': 'v2', 'created': 'Thu, 4 May 2017 18:19:10 GMT'}]
|
2017-05-08
|
[array(['Fan', 'Jianqing', ''], dtype=object)
array(['Wang', 'Weichen', ''], dtype=object)
array(['Zhu', 'Ziwei', ''], dtype=object)]
|
4,187 |
1507.06806
|
Shijin Zhang
|
Shijin Zhang
|
Remarks on symplectic mean curvature flows in K\"ahler surfaces with
positive holomorphic sectional curvatures
|
Added a result in abstract and corrected some typos. arXiv admin
note: text overlap with arXiv:1207.5253, arXiv:math/0411284, arXiv:1107.0829
by other authors
| null | null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we mainly study the mean curvature flow in K\"ahler surfaces
with positive holomorphic sectional curvatures. First, we prove that if the
ratio $\lambda$ of the maximum and the minimum of the holomorphic sectional
curvatures $< 2$, then there exists a positive constant
$\delta>\frac{29(\lambda-1)}{\sqrt{(48-24\lambda)^{2}+(29\lambda-29)^{2}}}$
such that $\cos\alpha\geq\delta$ is preserved along the flow, improving the
main theorem in [LY]; Secondly, as similar as the main theorem in [HL0], we
prove that when $\cos\alpha$ is close to $1$ enough, then the symplectic mean
curvature flow exists for long time and converges to a holomorphic curve;
Finally, we prove that the symplectic mean curvature flow on K\"ahler surfaces
with $\lambda\leq 1+\frac{1}{200}$ exists for long time and converges to a
holomorphic curve if the initial surface satisfies a pinching condition, which
generalize one of the main theorems in [HLY].
|
[{'version': 'v1', 'created': 'Fri, 24 Jul 2015 10:46:44 GMT'}
{'version': 'v2', 'created': 'Tue, 18 Aug 2015 03:54:04 GMT'}]
|
2015-08-19
|
[array(['Zhang', 'Shijin', ''], dtype=object)]
|
4,188 |
1909.03871
|
Darren Moore
|
Darren W. Moore
|
Quantum Hypergraph States in Continuous Variables
|
7 pages, 2 figures
|
Phys. Rev. A 100, 062301 (2019)
|
10.1103/PhysRevA.100.062301
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The measurement based, or one-way, model of quantum computation for
continuous variables uses a highly entangled state called a cluster state to
accomplish the task of computing. Cluster states that are universal for
computation are a subset of a class of states called graph states. These states
are Gaussian states and therefore require that the homodyne detection (Gaussian
measurement) scheme is supplemented with a non-Gaussian measurement for
universal computation, a significant experimental challenge. Here we define a
new non-Gaussian class of states based on hypergraphs which satisfy the
requirements of the Lloyd-Braunstein criteria while restricted to a Gaussian
measurement strategy. Our main result is to show that, taking advantage of the
intrinsic multimode nonlinearity, a hypergraph consisting of 3-edges can be
used to apply a three-mode operation to an input three-mode state. As a special
case, this technique can be used to apply the cubic phase gate to a single
mode.
|
[{'version': 'v1', 'created': 'Mon, 9 Sep 2019 14:01:21 GMT'}]
|
2019-12-11
|
[array(['Moore', 'Darren W.', ''], dtype=object)]
|
4,189 |
1703.00793
|
Charafeddine Mouzouni
|
Lorenzo Brandolese, Charafeddine Mouzouni
|
A short proof of the large time energy growth for the Boussinesq system
| null | null |
10.1007/s00332-017-9379-0
| null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We give a direct proof of the fact that the $L^{p)$-norms of global solutions
of the Boussinesq system in $R^{3}$ grow large as $ t \rightarrow + \infty $
for $ 1 < p < 3 $ and decay to zero for $ 3 < p \leq \infty $, providing exact
estimates from below and above using a suitable decomposition of the space-time
space $ R^{+} \times R^{3} $. In particular, the kinetic energy blows up as $
\| u(t) \|_{2}^{2} \sim c t^{1/2} $ for large time. This contrasts with the
case of the Navier-Stokes equations.
|
[{'version': 'v1', 'created': 'Thu, 2 Mar 2017 14:11:35 GMT'}]
|
2017-04-26
|
[array(['Brandolese', 'Lorenzo', ''], dtype=object)
array(['Mouzouni', 'Charafeddine', ''], dtype=object)]
|
4,190 |
0903.4575
|
Dr Arun K. Pati
|
Arun Kumar Pati
|
Entanglement in Non-Hermitian Quantum Theory
|
Latex file, 13 pages, no figures. Invited plenary talk in the
International Conference (Homi Bhabha Centenary Conference) on Non-Hermitian
Hamiltonians in Quantum Physics (PHHQP VIII) held at BARC, Mumbai during Jan
13-16, 2009
|
Pramana 73:485-498,2010
|
10.1007/s12043-009-0101-0
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Entanglement is one of the key feature of quantum world that has no classical
counterpart. This arises due to the linear superposition principle and the
tensor product structure of the Hilbert space when we deal with multiparticle
systems. In this paper, we will introduce the notion of entanglement for
quantum systems that are governed by non-Hermitian yet PT-symmetric
Hamiltonians. We will show that maximally entangled states in usual quantum
theory behave like non-maximally entangled states in PT-symmetric quantum
theory. Furthermore, we will show how to create entanglement between two
PTQubits using non-Hermitian Hamiltonians and discuss the entangling capability
of such interaction Hamiltonians that are non-Hermitian in nature.
|
[{'version': 'v1', 'created': 'Thu, 26 Mar 2009 13:59:16 GMT'}]
|
2011-09-14
|
[array(['Pati', 'Arun Kumar', ''], dtype=object)]
|
4,191 |
2303.03750
|
Vukosi Marivate
|
Richard Lastrucci, Isheanesu Dzingirai, Jenalea Rajab, Andani
Madodonga, Matimba Shingange, Daniel Njini, Vukosi Marivate
|
Preparing the Vuk'uzenzele and ZA-gov-multilingual South African
multilingual corpora
|
Accepted and to appear at Fourth workshop on Resources for African
Indigenous Languages (RAIL) at EACL 2023
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper introduces two multilingual government themed corpora in various
South African languages. The corpora were collected by gathering the South
African Government newspaper (Vuk'uzenzele), as well as South African
government speeches (ZA-gov-multilingual), that are translated into all 11
South African official languages. The corpora can be used for a myriad of
downstream NLP tasks. The corpora were created to allow researchers to study
the language used in South African government publications, with a focus on
understanding how South African government officials communicate with their
constituents. In this paper we highlight the process of gathering, cleaning and
making available the corpora. We create parallel sentence corpora for Neural
Machine Translation (NMT) tasks using Language-Agnostic Sentence
Representations (LASER) embeddings. With these aligned sentences we then
provide NMT benchmarks for 9 indigenous languages by fine-tuning a massively
multilingual pre-trained language model.
|
[{'version': 'v1', 'created': 'Tue, 7 Mar 2023 09:20:09 GMT'}
{'version': 'v2', 'created': 'Wed, 5 Apr 2023 09:39:32 GMT'}]
|
2023-04-06
|
[array(['Lastrucci', 'Richard', ''], dtype=object)
array(['Dzingirai', 'Isheanesu', ''], dtype=object)
array(['Rajab', 'Jenalea', ''], dtype=object)
array(['Madodonga', 'Andani', ''], dtype=object)
array(['Shingange', 'Matimba', ''], dtype=object)
array(['Njini', 'Daniel', ''], dtype=object)
array(['Marivate', 'Vukosi', ''], dtype=object)]
|
4,192 |
1508.05553
|
Xiaodong Wang
|
Daxin Zhu, Lei Wang, Yingjie Wu and Xiaodong Wang
|
A Practical O(R\log\log n+n) time Algorithm for Computing the Longest
Common Subsequence
| null | null | null | null |
cs.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we revisit the much studied LCS problem for two given
sequences. Based on the algorithm of Iliopoulos and Rahman for solving the LCS
problem, we have suggested 3 new improved algorithms. We first reformulate the
problem in a very succinct form. The problem LCS is abstracted to an abstract
data type DS on an ordered positive integer set with a special operation
Update(S,x). For the two input sequences X and Y of equal length n, the first
improved algorithm uses a van Emde Boas tree for DS and its time and space
complexities are O(R\log\log n+n) and O(R), where R is the number of matched
pairs of the two input sequences. The second algorithm uses a balanced binary
search tree for DS and its time and space complexities are O(R\log L+n) and
O(R), where L is the length of the longest common subsequence of X and Y. The
third algorithm uses an ordered vector for DS and its time and space
complexities are O(nL) and O(R).
|
[{'version': 'v1', 'created': 'Sun, 23 Aug 2015 00:56:03 GMT'}]
|
2015-08-25
|
[array(['Zhu', 'Daxin', ''], dtype=object)
array(['Wang', 'Lei', ''], dtype=object)
array(['Wu', 'Yingjie', ''], dtype=object)
array(['Wang', 'Xiaodong', ''], dtype=object)]
|
4,193 |
2008.03964
|
Swaroop Mishra
|
Swaroop Mishra, Anjana Arunkumar, Bhavdeep Sachdeva, Chris Bryan and
Chitta Baral
|
DQI: A Guide to Benchmark Evaluation
|
ICML UDL 2020
| null | null | null |
cs.CL cs.CV cs.LG cs.SY eess.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A `state of the art' model A surpasses humans in a benchmark B, but fails on
similar benchmarks C, D, and E. What does B have that the other benchmarks do
not? Recent research provides the answer: spurious bias. However, developing A
to solve benchmarks B through E does not guarantee that it will solve future
benchmarks. To progress towards a model that `truly learns' an underlying task,
we need to quantify the differences between successive benchmarks, as opposed
to existing binary and black-box approaches. We propose a novel approach to
solve this underexplored task of quantifying benchmark quality by debuting a
data quality metric: DQI.
|
[{'version': 'v1', 'created': 'Mon, 10 Aug 2020 08:38:55 GMT'}]
|
2020-08-11
|
[array(['Mishra', 'Swaroop', ''], dtype=object)
array(['Arunkumar', 'Anjana', ''], dtype=object)
array(['Sachdeva', 'Bhavdeep', ''], dtype=object)
array(['Bryan', 'Chris', ''], dtype=object)
array(['Baral', 'Chitta', ''], dtype=object)]
|
4,194 |
1601.00345
|
Arnaud Hemmerle
|
Arnaud Hemmerle and Thierry Charitat and Giovanna Fragneto and Jean
Daillant
|
Reduction in Tension and Stiffening of Lipid Membranes in an Electric
Field Revealed by X-ray Scattering
| null |
Phys. Rev. Lett. 116, 228101 (2016)
|
10.1103/PhysRevLett.116.228101
| null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The effect of AC electric fields on the elasticity of supported lipid
bilayers has been investigated at the microscopic level using grazing incidence
synchrotron x-ray scattering. A strong decrease in the membrane tension up to
1mN/m and a dramatic increase of its effective rigidity up to 300kBT are
observed for local electric potentials seen by the membrane < 1V. The
experimental results were analyzed using detailed electrokinetic modeling and
non-linear Poisson-Boltzmann theory. Based on a modeling of the electromagnetic
stress which provides an accurate description of bilayer separation vs pressure
curves, we show that the decrease in tension results from the amplification of
charge fluctuations on the membrane surface whereas the increase in bending
rigidity results from direct interaction between charges in the electric double
layer. These effects eventually lead to a destabilization of the bilayer and
vesicle formation. Similar effects are expected at the tens of nanometer
lengthscale in cell membranes with lower tension, and could explain a number of
electrically driven processes.
|
[{'version': 'v1', 'created': 'Sun, 3 Jan 2016 21:50:17 GMT'}
{'version': 'v2', 'created': 'Tue, 10 May 2016 08:37:17 GMT'}]
|
2016-06-08
|
[array(['Hemmerle', 'Arnaud', ''], dtype=object)
array(['Charitat', 'Thierry', ''], dtype=object)
array(['Fragneto', 'Giovanna', ''], dtype=object)
array(['Daillant', 'Jean', ''], dtype=object)]
|
4,195 |
hep-ex/0207097
|
Christopher
|
The BABAR Collaboration, B. Aubert, et al
|
Study of Inclusive Production of Charmonium Mesons in B Decay
|
15 pages, 13 postscript figures. To be published in Physical Review D
|
Phys.Rev.D67:032002,2003
|
10.1103/PhysRevD.67.032002
|
BABAR-PUB-02/04, SLAC-PUB-9327
|
hep-ex
| null |
The inclusive production of charmonium mesons in B meson decay has been
studied in a 20.3 fb$^{-1}$ data set collected by the BaBar experiment
operating at the $\Upsilon(4S)$ resonance. Branching fractions have been
measured for the inclusive production of the charmonium mesons $J/\psi$,
$\psi(2S)$, $\chi_{c1}$, and $\chi_{c2}$. The branching fractions are also
presented as a function of the center-of-mass momentum of the mesons and of the
helicity of the $J/\psi$.
|
[{'version': 'v1', 'created': 'Mon, 29 Jul 2002 19:34:17 GMT'}
{'version': 'v2', 'created': 'Wed, 16 Oct 2002 23:15:19 GMT'}
{'version': 'v3', 'created': 'Thu, 9 Jan 2003 20:25:18 GMT'}]
|
2008-11-26
|
[array(['The BABAR Collaboration', '', ''], dtype=object)
array(['Aubert', 'B.', ''], dtype=object)]
|
4,196 |
1907.01721
|
\'Etienne Andr\'e
|
\'Etienne Andr\'e
|
What's decidable about parametric timed automata?
|
This is the author version of the manuscript of the same name
published in the International Journal on Software Tools for Technology
Transfer (STTT), April 2019, Volume 21, Issue 2, pp 203-219. This work is
partially supported by the ANR national research program PACS
(ANR-14-CE28-0002)
|
International Journal on Software Tools for Technology Transfer
(STTT), April 2019, Volume 21, Issue 2, pp 203-219
|
10.1007/s10009-017-0467-0
| null |
cs.LO cs.FL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Parametric timed automata (PTAs) are a powerful formalism to reason, simulate
and formally verify critical real-time systems. After 25 years of research on
PTAs, it is now well-understood that any non-trivial problem studied is
undecidable for general PTAs. We provide here a survey of decision and
computation problems for PTAs. On the one hand, bounding time, bounding the
number of parameters or the domain of the parameters does not (in general) lead
to any decidability. On the other hand, restricting the number of clocks, the
use of clocks (compared or not with the parameters), and the use of parameters
(e.g. used only as upper or lower bounds) leads to decidability of some
problems. We also put emphasis on open problems. We also discuss formalisms
close to parametric timed automata (such as parametric hybrid automata or
parametric interrupt timed automata), and we study tools dedicated to PTAs and
their extensions.
|
[{'version': 'v1', 'created': 'Wed, 3 Jul 2019 03:26:33 GMT'}]
|
2019-07-04
|
[array(['André', 'Étienne', ''], dtype=object)]
|
4,197 |
2101.08551
|
Robert Verschuren
|
Robert Matthijs Verschuren
|
Customer Price Sensitivities in Competitive Automobile Insurance Markets
| null |
Expert Systems With Applications (2022), 202, 1-18
|
10.1016/j.eswa.2022.117133
| null |
stat.AP cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Insurers are increasingly adopting more demand-based strategies to
incorporate the indirect effect of premium changes on their policyholders'
willingness to stay. However, since in practice both insurers' renewal premia
and customers' responses to these premia typically depend on the customer's
level of risk, it remains challenging in these strategies to determine how to
properly control for this confounding. We therefore consider a causal inference
approach in this paper to account for customers' price sensitivity and to
deduce optimal, multi-period profit maximizing premium renewal offers. More
specifically, we extend the discrete treatment framework of Guelman and
Guill\'en (2014) by Extreme Gradient Boosting, or XGBoost, and by multiple
imputation to better account for the uncertainty in the counterfactual
responses. We additionally introduce the continuous treatment framework with
XGBoost to the insurance literature to allow identification of the exact
optimal renewal offers and account for any competition in the market by
including competitor offers. The application of the two treatment frameworks to
a Dutch automobile insurance portfolio suggests that a policy's competitiveness
in the market is crucial for a customer's price sensitivity and that XGBoost is
more appropriate to describe this than the traditional logistic regression.
Moreover, an efficient frontier of both frameworks indicates that substantially
more profit can be gained on the portfolio than realized, also already with
less churn and in particular if we allow for continuous rate changes. A
multi-period renewal optimization confirms these findings and demonstrates that
the competitiveness enables temporal feedback of previous rate changes on
future demand.
|
[{'version': 'v1', 'created': 'Thu, 21 Jan 2021 11:07:20 GMT'}
{'version': 'v2', 'created': 'Fri, 18 Feb 2022 18:01:54 GMT'}]
|
2022-10-10
|
[array(['Verschuren', 'Robert Matthijs', ''], dtype=object)]
|
4,198 |
2009.13428
|
Oscar Peralta
|
Oscar Peralta, Matthieu Simon
|
Ruin problems for risk processes with dependent phase-type claims
| null | null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider continuous time risk processes in which the claim sizes are
dependent and non-identically distributed phase-type distributions. The class
of distributions we propose is easy to characterize and allows to incorporate
the dependence between claims in a simple and intuitive way. It is also
designed to facilitate the study of the risk processes by using a
Markov-modulated fluid embedding technique. Using this technique, we obtain
simple recursive procedures to determine the joint distribution of the time of
ruin, the deficit at ruin and the number of claims before the ruin. We also
obtain some bounds for the ultimate ruin probability. Finally, we provide a few
examples of multivariate phase-type distributions and use them for numerical
illustration.
|
[{'version': 'v1', 'created': 'Mon, 28 Sep 2020 15:45:23 GMT'}]
|
2020-09-29
|
[array(['Peralta', 'Oscar', ''], dtype=object)
array(['Simon', 'Matthieu', ''], dtype=object)]
|
4,199 |
hep-th/0206098
|
Steven S. Gubser
|
Vadim Borokhov and Steven S. Gubser
|
Non-supersymmetric deformations of the dual of a confining gauge theory
|
18 pages, latex, published as JHEP 0305 (2003) 034
|
JHEP 0305 (2003) 034
|
10.1088/1126-6708/2003/05/034
|
PUPT-2037, CALT-68-2382, CITUSC/02-014
|
hep-th
| null |
We introduce a computational technique for studying non-supersymmetric
deformations of domain wall solutions of interest in AdS/CFT. We focus on the
Klebanov-Strassler solution, which is dual to a confining gauge theory. From an
analysis of asymptotics we find that there are three deformations that leave
the ten-dimensional supergravity solution regular and preserve the global
bosonic symmetries of the supersymmetric solution. Also, we show that there are
no regular near-extremal deformations preserving the global symmetries, as one
might expect from the existence of a gap in the gauge theory.
|
[{'version': 'v1', 'created': 'Wed, 12 Jun 2002 01:35:51 GMT'}
{'version': 'v2', 'created': 'Sat, 15 Nov 2003 18:40:46 GMT'}]
|
2009-11-07
|
[array(['Borokhov', 'Vadim', ''], dtype=object)
array(['Gubser', 'Steven S.', ''], dtype=object)]
|
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