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|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
17,700 |
2205.09754
|
Krzysztof Szajowski
|
Krzysztof J. Szajowski
|
Sequential selections with minimization of failure
|
26p
| null | null | null |
math.OC math.PR
|
http://creativecommons.org/licenses/by/4.0/
|
The decision-maker (DM) sequentially evaluates up to N of different, rankable
options. DM must select exactly the best one at the moment of its appearance.
In the process of searching, DM finds out with each applicant whether she is
the best applicant among those assessed so far (we call him a candidate). DM
cannot return to rejected candidates. We discuss the psychological aspects of
this selection problem, known in the literature as the secretary problem. The
analysis is based on knowledge of the chances, and a subjective assessment of
acceptance of the positive and negative effects DM's decision. The acceptance
assessment of success and failure is presented on subjective scales. We set an
optimal policy that recommends analyzing applicants up to a certain point in
time (a threshold time) without selecting any of them and then selecting the
next encountered candidate. The determined optimal threshold depends on the
level of acceptance of the positive and negative effects of the choice. This
issue is discussed in the article.
|
[{'version': 'v1', 'created': 'Wed, 18 May 2022 20:55:01 GMT'}]
|
2022-05-23
|
[array(['Szajowski', 'Krzysztof J.', ''], dtype=object)]
|
17,701 |
1909.06680
|
Alexander Rasmussen
|
Alexander J. Rasmussen
|
WWPD elements of big mapping class groups
|
Final version to appear in Groups, Geometry, and Dynamics
| null | null | null |
math.GR math.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study mapping class groups of infinite type surfaces with isolated
punctures and their actions on the loop graphs introduced by Bavard-Walker. We
classify all of the mapping classes in these actions which are loxodromic with
a WWPD action on the corresponding loop graph. The WWPD property is a weakening
of Bestvina-Fujiwara's weak proper discontinuity and is useful for constructing
non-trivial quasimorphisms. We use this classification to give a sufficient
criterion for subgroups of big mapping class groups to have
infinite-dimensional second bounded cohomology and use this criterion to give
simple proofs that certain natural subgroups of big mapping class groups have
infinite-dimensional second bounded cohomology.
|
[{'version': 'v1', 'created': 'Sat, 14 Sep 2019 21:21:40 GMT'}
{'version': 'v2', 'created': 'Thu, 6 Aug 2020 14:32:31 GMT'}]
|
2020-08-07
|
[array(['Rasmussen', 'Alexander J.', ''], dtype=object)]
|
17,702 |
atom-ph/9509002
|
Tobias Grabo
|
E.K.U. Gross, M. Petersilka, T. Grabo
|
Conventional Quantum Chemical Correlation Energy versus
Density-Functional Correlation Energy
|
12 pages, Latex, no figures, to appear in "Density Functional Methods
in Chemistry" (ACS series, 1996)
| null | null | null |
atom-ph chem-ph physics.atom-ph
| null |
We analyze the difference between the correlation energy as defined within
the conventional quantum chemistry framework and its namesake in
density-functional theory. Both quantities are rigorously defined concepts; one
finds that $E_c^{QC} \geq E_c^{DFT}$. We give numerical and analytical
arguments suggesting that the numerical difference between the two rigorous
quantities is small. Finally, approximate density functional correlation
energies resulting from some popular correlation energy functionals are
compared with the conventional quantum chemistry values.
|
[{'version': 'v1', 'created': 'Tue, 19 Sep 1995 14:07:20 GMT'}]
|
2008-02-03
|
[array(['Gross', 'E. K. U.', ''], dtype=object)
array(['Petersilka', 'M.', ''], dtype=object)
array(['Grabo', 'T.', ''], dtype=object)]
|
17,703 |
cond-mat/0702606
|
Eric Meloche
|
E. Meloche, M. L. Plumer, C. M. Pinciuc
|
Surface spin dynamics of antiferromagnetically coupled frustrated
triangular films
|
24 pages, 9 figures
| null |
10.1103/PhysRevB.76.214402
| null |
cond-mat.mtrl-sci
| null |
Results are presented for spin-wave dispersions in geometrically frustrated
stacked triangular antiferromagnets with a thin film or semi-infinite geometry
having either zero, easy-plane, or easy-axis anisotropy. Surface effects on the
equilibrium spin configurations and excitation spectrum are investigated for
the case of antiferromagnetically coupled films, serving to extend previous
results on ferromagnetically coupled layers [E. Meloche et al., Phys. Rev. B
74, 094424 (2006)]. An operator equation of motion formalism is applied to
systems which are quasi-one and quasi-two dimensional in character. In contrast
to the case of ferromagnetically coupled films the new results show surface
modes that are well separated in frequency from bulk excitations. Magnetic
excitations in thin films with an even or an odd number of layers show
qualitatively different behavior. These results are relevant for a wide variety
of stacked triangular antiferromagnetics materials.
|
[{'version': 'v1', 'created': 'Mon, 26 Feb 2007 16:35:10 GMT'}]
|
2009-11-13
|
[array(['Meloche', 'E.', ''], dtype=object)
array(['Plumer', 'M. L.', ''], dtype=object)
array(['Pinciuc', 'C. M.', ''], dtype=object)]
|
17,704 |
1106.4507
|
Pooria Pakrooh
|
Pooria Pakrooh, Arash Amini, and Farrokh Marvasti
|
OFDM pilot allocation for sparse channel estimation
| null | null |
10.1186/1687-6180-2012-59
| null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In communication systems, efficient use of the spectrum is an indispensable
concern. Recently the use of compressed sensing for the purpose of estimating
Orthogonal Frequency Division Multiplexing (OFDM) sparse multipath channels has
been proposed to decrease the transmitted overhead in form of the pilot
subcarriers which are essential for channel estimation. In this paper, we
investigate the problem of deterministic pilot allocation in OFDM systems. The
method is based on minimizing the coherence of the submatrix of the unitary
Discrete Fourier Transform (DFT) matrix associated with the pilot subcarriers.
Unlike the usual case of equidistant pilot subcarriers, we show that
non-uniform patterns based on cyclic difference sets are optimal. In cases
where there are no difference sets, we perform a greedy search method for
finding a suboptimal solution. We also investigate the performance of the
recovery methods such as Orthogonal Matching Pursuit (OMP) and Iterative Method
with Adaptive Thresholding (IMAT) for estimation of the channel taps.
|
[{'version': 'v1', 'created': 'Wed, 22 Jun 2011 17:05:46 GMT'}]
|
2015-05-28
|
[array(['Pakrooh', 'Pooria', ''], dtype=object)
array(['Amini', 'Arash', ''], dtype=object)
array(['Marvasti', 'Farrokh', ''], dtype=object)]
|
17,705 |
1512.05054
|
Qidi Peng
|
Sixian Jin, Qidi Peng and Henry Schellhorn
|
Estimation of the Pointwise H\"older Exponent of Hidden Multifractional
Brownian Motion Using Wavelet Coefficients
| null | null | null | null |
math.PR math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a wavelet-based approach to construct consistent estimators of the
pointwise H\"older exponent of a multifractional Brownian motion, in the case
where this underlying process is not directly observed. The relative merits of
our estimator are discussed, and we introduce an application to the problem of
estimating the functional parameter of a nonlinear model.
|
[{'version': 'v1', 'created': 'Wed, 16 Dec 2015 05:21:47 GMT'}
{'version': 'v2', 'created': 'Sat, 9 Jul 2016 18:20:53 GMT'}
{'version': 'v3', 'created': 'Tue, 12 Jul 2016 01:26:20 GMT'}
{'version': 'v4', 'created': 'Sun, 17 Jul 2016 21:10:19 GMT'}]
|
2016-07-19
|
[array(['Jin', 'Sixian', ''], dtype=object)
array(['Peng', 'Qidi', ''], dtype=object)
array(['Schellhorn', 'Henry', ''], dtype=object)]
|
17,706 |
0910.5940
|
David Nash
|
Alexander S. Kleshchev, David Nash
|
An interpretation of the Lascoux-Leclerc-Thibon algorithm and graded
representation theory
|
11 pages
| null | null | null |
math.RT math.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We use graded Specht modules to calculate the graded decomposition numbers
for the Iwahori-Hecke algebra of the symmetric group over a field of
characteristic zero at a root of unity. The algorithm arrived at is the
Lascoux-Leclerc-Thibon algorithm in disguise. Thus we interpret the algorithm
in terms of graded representation theory.
|
[{'version': 'v1', 'created': 'Fri, 30 Oct 2009 18:35:41 GMT'}]
|
2009-11-02
|
[array(['Kleshchev', 'Alexander S.', ''], dtype=object)
array(['Nash', 'David', ''], dtype=object)]
|
17,707 |
0810.0304
|
Daniel Caro
|
Daniel Caro
|
Stability of holonomicity over quasi-projective varieties
| null | null | null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $\V$ be a mixed characteristic complete discrete valuation ring with
perfect residue field $k$. We solve Berthelot's conjectures on the stability of
the holonomicity over smooth projective formal $\V$-schemes. Then we build a
category of complexes of arithmetic $\D$-modules over quasi-projective
$k$-varieties with bounded, $F$-holonomic cohomology. We get its stability
under Grothendieck's six operations.
|
[{'version': 'v1', 'created': 'Wed, 1 Oct 2008 22:03:51 GMT'}
{'version': 'v2', 'created': 'Wed, 24 Jun 2009 17:14:50 GMT'}
{'version': 'v3', 'created': 'Wed, 24 Jun 2009 20:58:21 GMT'}]
|
2009-06-24
|
[array(['Caro', 'Daniel', ''], dtype=object)]
|
17,708 |
1510.08458
|
Nathan Goldbaum
|
Nathan J. Goldbaum, Mark R. Krumholz, John C. Forbes
|
Mass Transport and Turbulence in Gravitationally Unstable Disk Galaxies.
I: The Case of Pure Self-Gravity
|
18 pages, 9 figures. Accepted for publication in ApJ. 6.5 TB of
simulation data and processed derived data are available at
http://dx.doi.org/10.13012/J8F769GV
| null |
10.1088/0004-637X/814/2/131
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The role of gravitational instability-driven turbulence in determining the
structure and evolution of disk galaxies, and the extent to which gravity
rather than feedback can explain galaxy properties, remains an open question.
To address it, we present high resolution adaptive mesh refinement simulations
of Milky Way-like isolated disk galaxies, including realistic heating and
cooling rates and a physically motivated prescription for star formation, but
no form of star formation feedback. After an initial transient, our galaxies
reach a state of fully-nonlinear gravitational instability. In this state,
gravity drives turbulence and radial inflow. Despite the lack of feedback, the
gas in our galaxy models shows substantial turbulent velocity dispersions,
indicating that gravitational instability alone may be able to power the
velocity dispersions observed in nearby disk galaxies on 100 pc scales.
Moreover, the rate of mass transport produced by this turbulence approaches
$\sim 1$ $M_\odot$ yr$^{-1}$ for Milky Way-like conditions, sufficient to fully
fuel star formation in the inner disks of galaxies. In a companion paper we add
feedback to our models, and use the comparison between the two cases to
understand what galaxy properties depend sensitively on feedback, and which can
be understood as the product of gravity alone. All of the code, initial
conditions, and simulation data for our model are publicly available.
|
[{'version': 'v1', 'created': 'Wed, 28 Oct 2015 20:08:16 GMT'}]
|
2015-12-02
|
[array(['Goldbaum', 'Nathan J.', ''], dtype=object)
array(['Krumholz', 'Mark R.', ''], dtype=object)
array(['Forbes', 'John C.', ''], dtype=object)]
|
17,709 |
1906.08787
|
David Vartanyan
|
David Vartanyan, Adam Burrows, and David Radice
|
Temporal and Angular Variations of 3D Core-Collapse Supernova Emissions
and their Physical Correlations
|
26 pages, 11 models, 8 explosions, accepted to MNRAS
| null |
10.1093/mnras/stz2307
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We provide the time series and angular distributions of the neutrino and
gravitational-wave emissions of eleven state-of-the-art three-dimensional
non-rotating core-collapse supernova models and explore correlations between
these signatures and the real-time dynamics of the shock and the
proto-neutron-star core. The neutrino emissions are roughly isotropic on
average, with instantaneous excursions about the mean inferred luminosity of as
much as $\pm$20%. The deviation from isotropy is least for the
"$\nu_{\mu}$"-type neutrinos and the lowest-mass progenitors. Instantaneous
temporal luminosity variations along a given direction for exploding models
average $\sim$2$-$4%, but can be as high as $\sim$10%. For non-exploding
models, they can achieve $\sim$25%. The temporal variations in the neutrino
emissions correlate with the temporal and angular variations in the mass
accretion rate. We witness the LESA phenomenon in all our models and find that
the vector direction of the LESA dipole and that of the inner Y$_\mathrm{e}$
distribution are highly correlated. For our entire set of 3D models, we find
strong connections between the cumulative neutrino energy losses, the radius of
the proto-neutron star, and the $f$-mode frequency of the gravitational wave
emissions. When physically normalized, the progenitor-to-progenitor variation
in any of these quantities is no more than $\sim$10%. Moreover, the reduced
$f$-mode frequency is independent of time after bounce to better than
$\sim$10%. Therefore, simultaneous measurement of gravitational waves and
neutrinos from a given supernova event can be used synergistically to extract
real physical quantities of the supernova core.
|
[{'version': 'v1', 'created': 'Thu, 20 Jun 2019 18:00:05 GMT'}
{'version': 'v2', 'created': 'Wed, 21 Aug 2019 20:03:47 GMT'}]
|
2019-08-23
|
[array(['Vartanyan', 'David', ''], dtype=object)
array(['Burrows', 'Adam', ''], dtype=object)
array(['Radice', 'David', ''], dtype=object)]
|
17,710 |
1110.6785
|
Julien Vignollet
|
Julien Vignollet, Chris J. Pearce, and Lukasz Kaczmarczyk
|
A Galerkin least-square stabilisation technique for hyperelastic
biphasic soft tissue
| null | null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An hyperelastic biphasic model is presented. For slow-draining problems
(permeability less than 1\times10-2 mm4 N-1 s-1), numerical instabilities in
the form of non-physical oscillations in the pressure field are observed in 3D
problems using tetrahedral Taylor-Hood finite elements. As an alternative to
considerable mesh refinement, a Galerkin least-square stabilization framework
is proposed. This technique drastically reduces the pressure discrepancies and
prevents these oscillations from propagating towards the centre of the medium.
The performance and robustness of this technique are demonstrated on a 3D
numerical example.
|
[{'version': 'v1', 'created': 'Mon, 31 Oct 2011 13:31:31 GMT'}]
|
2011-11-01
|
[array(['Vignollet', 'Julien', ''], dtype=object)
array(['Pearce', 'Chris J.', ''], dtype=object)
array(['Kaczmarczyk', 'Lukasz', ''], dtype=object)]
|
17,711 |
2211.14427
|
Roberto Vila Gabriel
|
Roberto Vila, Narayanaswamy Balakrishnan, Helton Saulo, Peter Z\"ornig
|
Unit-log-symmetric models: Characterization, statistical properties and
its use in analyzing internet access data
|
23 pages, 27 figures
| null | null | null |
stat.ME
|
http://creativecommons.org/licenses/by/4.0/
|
We present here a unit-log-symmetric model based on the bivariate
log-symmetric distribution. It is a flexible family of distributions over the
interval $(0, 1)$. We then discuss its mathematical properties such as
stochastic representation, symmetry, modality, moments, quantile function,
entropy and maximum likelihood estimators, paying particular attention to the
special cases of unit log-normal, unit-log-Student-$t$ and unit-log-Laplace
distributions. Finally, some empirical results and practical illustrations are
presented.
|
[{'version': 'v1', 'created': 'Sat, 26 Nov 2022 01:24:54 GMT'}
{'version': 'v2', 'created': 'Tue, 6 Dec 2022 16:59:05 GMT'}]
|
2022-12-07
|
[array(['Vila', 'Roberto', ''], dtype=object)
array(['Balakrishnan', 'Narayanaswamy', ''], dtype=object)
array(['Saulo', 'Helton', ''], dtype=object)
array(['Zörnig', 'Peter', ''], dtype=object)]
|
17,712 |
0712.2174
|
St\'ephane Ouvry
|
Stephane Ouvry
|
Anyons and lowest Landau level Anyons
|
32 pages, 5 figures (pdflatex)
|
Seminaire Poincare 11:77-107,2007
| null | null |
cond-mat.stat-mech cond-mat.mes-hall
| null |
A review on the Anyon model and the lowest Landau level Anyon model is
presented.
|
[{'version': 'v1', 'created': 'Thu, 13 Dec 2007 15:37:54 GMT'}]
|
2009-11-19
|
[array(['Ouvry', 'Stephane', ''], dtype=object)]
|
17,713 |
1909.13343
|
Xiao Wang
|
Akshay Arora, Arun Nethi, Priyanka Kharat, Vency Verghese, Grant
Jenkins, Steve Miff, Vikas Chowdhry, Xiao Wang
|
ISTHMUS: Secure, Scalable, Real-time and Robust Machine Learning
Platform for Healthcare
|
11 pages, 7 figures. Comments are welcome
| null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In recent times, machine learning (ML) and artificial intelligence (AI) based
systems have evolved and scaled across different industries such as finance,
retail, insurance, energy utilities, etc. Among other things, they have been
used to predict patterns of customer behavior, to generate pricing models, and
to predict the return on investments. But the successes in deploying machine
learning models at scale in those industries have not translated into the
healthcare setting. There are multiple reasons why integrating ML models into
healthcare has not been widely successful, but from a technical perspective,
general-purpose commercial machine learning platforms are not a good fit for
healthcare due to complexities in handling data quality issues, mandates to
demonstrate clinical relevance, and a lack of ability to monitor performance in
a highly regulated environment with stringent security and privacy needs. In
this paper, we describe Isthmus, a turnkey, cloud-based platform which
addresses the challenges above and reduces time to market for operationalizing
ML/AI in healthcare. Towards the end, we describe three case studies which shed
light on Isthmus capabilities. These include (1) supporting an end-to-end
lifecycle of a model which predicts trauma survivability at hospital trauma
centers, (2) bringing in and harmonizing data from disparate sources to create
a community data platform for inferring population as well as patient level
insights for Social Determinants of Health (SDoH), and (3) ingesting
live-streaming data from various IoT sensors to build models, which can
leverage real-time and longitudinal information to make advanced time-sensitive
predictions.
|
[{'version': 'v1', 'created': 'Sun, 29 Sep 2019 19:15:08 GMT'}
{'version': 'v2', 'created': 'Tue, 1 Oct 2019 16:06:39 GMT'}]
|
2019-10-02
|
[array(['Arora', 'Akshay', ''], dtype=object)
array(['Nethi', 'Arun', ''], dtype=object)
array(['Kharat', 'Priyanka', ''], dtype=object)
array(['Verghese', 'Vency', ''], dtype=object)
array(['Jenkins', 'Grant', ''], dtype=object)
array(['Miff', 'Steve', ''], dtype=object)
array(['Chowdhry', 'Vikas', ''], dtype=object)
array(['Wang', 'Xiao', ''], dtype=object)]
|
17,714 |
2112.15479
|
Jung Ho Ahn
|
Sangpyo Kim and Jongmin Kim and Michael Jaemin Kim and Wonkyung Jung
and Minsoo Rhu and John Kim and Jung Ho Ahn
|
BTS: An Accelerator for Bootstrappable Fully Homomorphic Encryption
|
15 pages, 10 figures
| null |
10.1145/3470496.3527415
| null |
cs.CR cs.AR
|
http://creativecommons.org/licenses/by/4.0/
|
Homomorphic encryption (HE) enables the secure offloading of computations to
the cloud by providing computation on encrypted data (ciphertexts). HE is based
on noisy encryption schemes in which noise accumulates as more computations are
applied to the data. The limited number of operations applicable to the data
prevents practical applications from exploiting HE. Bootstrapping enables an
unlimited number of operations or fully HE (FHE) by refreshing the ciphertext.
Unfortunately, bootstrapping requires a significant amount of additional
computation and memory bandwidth as well. Prior works have proposed hardware
accelerators for computation primitives of FHE. However, to the best of our
knowledge, this is the first to propose a hardware FHE accelerator that
supports bootstrapping as a first-class citizen.
In particular, we propose BTS - Bootstrappable, Technologydriven, Secure
accelerator architecture for FHE. We identify the challenges of supporting
bootstrapping in the accelerator and analyze the off-chip memory bandwidth and
computation required. In particular, given the limitations of modern memory
technology, we identify the HE parameter sets that are efficient for FHE
acceleration. Based on the insights gained from our analysis, we propose BTS,
which effectively exploits the parallelism innate in HE operations by arranging
a massive number of processing elements in a grid. We present the design and
microarchitecture of BTS, including a network-on-chip design that exploits a
deterministic communication pattern. BTS shows 5,556x and 1,306x improved
execution time on ResNet-20 and logistic regression over a CPU, with a chip
area of 373.6mm^2 and up to 163.2W of power.
|
[{'version': 'v1', 'created': 'Fri, 31 Dec 2021 14:34:50 GMT'}
{'version': 'v2', 'created': 'Fri, 29 Apr 2022 02:42:02 GMT'}]
|
2022-05-02
|
[array(['Kim', 'Sangpyo', ''], dtype=object)
array(['Kim', 'Jongmin', ''], dtype=object)
array(['Kim', 'Michael Jaemin', ''], dtype=object)
array(['Jung', 'Wonkyung', ''], dtype=object)
array(['Rhu', 'Minsoo', ''], dtype=object)
array(['Kim', 'John', ''], dtype=object)
array(['Ahn', 'Jung Ho', ''], dtype=object)]
|
17,715 |
hep-ph/9406351
|
Bill Scott
|
P. F. Harrison and W. G. Scott
|
Generation Permutation Symmetry and the Quark Mixing Matrix
|
8 pages of text; no figures. RAL-94-072
|
Phys.Lett.B333:471-475,1994
|
10.1016/0370-2693(94)90170-8
| null |
hep-ph
| null |
We propose a new discrete symmetry in the generation space of the fundamental
fermions, consistent with the observed fermion mass spectrum. In the case of
the quarks, the symmetry leads to the unique prediction of a flat CKM matrix at
high energy. We explore the possibility that evolution due to quantum
corrections leads to the observed hierarchical form of the CKM matrix at low
energies.
|
[{'version': 'v1', 'created': 'Tue, 21 Jun 1994 11:00:00 GMT'}]
|
2014-11-17
|
[array(['Harrison', 'P. F.', ''], dtype=object)
array(['Scott', 'W. G.', ''], dtype=object)]
|
17,716 |
astro-ph/0608033
|
Xiangyu Wang
|
Xiang-Yu Wang, Zhuo Li, Eli Waxman and Peter Meszaros
|
Nonthermal gamma-ray and X-ray flashes from shock breakout in gamma-ray
bursts/supernovae
|
Accepted for publication in ApJ; Introduction expanded, references
added, conclusions unchanged; total 7 pages including 2 color figures and 1
table
|
Astrophys.J.664:1026-1032,2007
|
10.1086/519228
| null |
astro-ph
| null |
Thermal X-ray emission which is simultaneous with the prompt gamma-rays has
been detected for the first time from a supernova connected with a gamma-ray
burst (GRB), namely GRB060218/SN2006aj. It has been interpreted as arising from
the breakout of a mildly relativistic, radiation-dominated shock from a dense
stellar wind surrounding the progenitor star. There is also evidence for the
presence of a mildly relativistic ejecta in GRB980425/SN1998bw, based on its
X-ray and radio afterglow. Here we study the process of repeated bulk Compton
scatterings of shock breakout thermal photons by the mildly relativistic
ejecta. During the shock breakout process, a fraction of the thermal photons
would be repeatedly scattered between the pre-shock material and the shocked
material as well as the mildly relativistic ejecta and, as a result, the
thermal photons get boosted to increasingly higher energies. This bulk motion
Comptonization mechanism will produce nonthermal gamma-ray and X-ray flashes,
which could account for the prompt gamma-ray burst emission in low-luminosity
supernova-connected GRBs, such as GRB060218. A Monte Carlo code has been
developed to simulate this repeated scattering process, which confirms that a
significant fraction of the thermal photons get "accelerated" to form a
nonthermal component, with a dominant luminosity. This interpretation for the
prompt nonthermal emission of GRB060218 may imply that either the usual
internal shock emission from highly relativistic jets in these low-luminosity
GRBs is weak, or alternatively, that there are no highly relativistic jets in
this peculiar class of bursts.
|
[{'version': 'v1', 'created': 'Wed, 2 Aug 2006 15:55:07 GMT'}
{'version': 'v2', 'created': 'Thu, 26 Apr 2007 17:07:47 GMT'}]
|
2008-11-26
|
[array(['Wang', 'Xiang-Yu', ''], dtype=object)
array(['Li', 'Zhuo', ''], dtype=object)
array(['Waxman', 'Eli', ''], dtype=object)
array(['Meszaros', 'Peter', ''], dtype=object)]
|
17,717 |
2110.06333
|
W. A. Zuniga-Galindo
|
A. R. Fuquen-Tibat\'a, H. Garc\'ia-Compe\'an, W. A. Z\'u\~niga-Galindo
|
Euclidean Quantum Field Formulation of p-Adic open string amplitudes
|
Final version. Accepted in Nuclear Physics B
| null |
10.1016/j.nuclphysb.2022.115684
| null |
hep-th math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study in a rigorous mathematical way p-adic quantum field theories whose
N-point amplitudes are the expectation of products of vertex operators. We show
that this type of amplitudes admit a series expansion where each term is an
Igusa's local zeta function. The lowest term in this series is a regularized
version of the p-adic open Koba-Nielsen string amplitude.
|
[{'version': 'v1', 'created': 'Tue, 12 Oct 2021 20:36:39 GMT'}
{'version': 'v2', 'created': 'Sat, 22 Jan 2022 17:45:50 GMT'}]
|
2022-03-02
|
[array(['Fuquen-Tibatá', 'A. R.', ''], dtype=object)
array(['García-Compeán', 'H.', ''], dtype=object)
array(['Zúñiga-Galindo', 'W. A.', ''], dtype=object)]
|
17,718 |
1804.04923
|
Yury Verbetsky
|
Yu. G. Verbetsky, M. S. Svanidze, A. Iashvili, I. Iashvili, L.
Kakabadze
|
Extensive air showers' arrival direction distribution by the TSU array
under GELATICA experiment
|
PDF 9 pages A4; 10 figures; 18 references
| null | null | null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The distribution of the arrival zenith angle of the Extensive Air Showers
(EAS) with a wide range of a total number of charged particles is studied using
the experimental data obtained using the EAS 4-detector array 'TSU' in Tbilisi.
The station is a part of the GELATICA net in Georgia (GEorgian Large-area Angle
and TIme Coincidence Array), which is devoted to the study of possible
correlations in the arrival times and directions of separate EAS events over
large distances. It is shown that the distribution function with the
conventional exponential dependence of showers' flux on absorbing air thickness
provides a good approximation for the arrival direction distribution. The
dependence of the EAS absorption path estimation on the angular trimming
boundary of data set is studied; the necessity of strict verification of the
used value of data trimming boundary is stated.
|
[{'version': 'v1', 'created': 'Fri, 13 Apr 2018 12:54:33 GMT'}]
|
2018-04-16
|
[array(['Verbetsky', 'Yu. G.', ''], dtype=object)
array(['Svanidze', 'M. S.', ''], dtype=object)
array(['Iashvili', 'A.', ''], dtype=object)
array(['Iashvili', 'I.', ''], dtype=object)
array(['Kakabadze', 'L.', ''], dtype=object)]
|
17,719 |
physics/0009073
|
Thad G. Walker
|
S. Kadlecek, J. Sebby, R. Newell, and T. G. Walker
|
Non-destructive spatial heterodyne imaging of cold atoms
|
text+3 figures, submitted to Optics Letters
|
Optics Lett. 26, 137 (2001)
|
10.1364/OL.26.000137
| null |
physics.atom-ph
| null |
We demonstrate a new method for non-destructive imaging of laser-cooled
atoms. This spatial heterodyne technique forms a phase image by interfering a
strong carrier laser beam with a weak probe beam that passes through the cold
atom cloud. The figure of merit equals or exceeds that of phase-contrast
imaging, and the technique can be used over a wider range of spatial scales. We
show images of a dark spot MOT taken with imaging fluences as low as 61 pJ/cm^2
at a detuning of 11 linewidths, resulting in 0.0004 photons scattered per atom.
|
[{'version': 'v1', 'created': 'Mon, 25 Sep 2000 22:00:17 GMT'}
{'version': 'v2', 'created': 'Tue, 26 Sep 2000 14:35:04 GMT'}]
|
2009-11-06
|
[array(['Kadlecek', 'S.', ''], dtype=object)
array(['Sebby', 'J.', ''], dtype=object)
array(['Newell', 'R.', ''], dtype=object)
array(['Walker', 'T. G.', ''], dtype=object)]
|
17,720 |
1701.03905
|
Maria D. Caballero-Garcia Dr
|
M. D. Caballero-Garcia (1), M. Dovciak (1), I. Papadakis (2,3), A.
Epitropakis (2), J. Svoboda (1), E. Kara (4), V. Karas (1) ((1) ASU-CAS,
Prague, (2) U. of Crete, (3) F. of Research, (4) U. of Maryland)
|
KYNREFREV - implementation of an X-ray reverberation model in XSPEC
|
10 pages, 5 figures and 2 tables. Submitted to Proceedings of Science
("APCS2016: Accretion Processes in Cosmic Sources" held at S. Petersburg,
Eds. Franco Giovannelli & Lola Sabau-Graziati)
| null | null | null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present briefly the first results obtained by the application of the
KYNREFREV-reverberation model, which is ready for its use in XSPEC. This model
computes the time dependent reflection spectra of the disc as a response to a
flash of primary power-law radiation from a point source corona located on the
axis of the black-hole accretion disc. The assumptions of the model are:
central Kerr black hole, surrounded by a Keplerian, geometrically thin,
optically thick, ionised disc with the possibility of defining the radial
density profile and a stationary hot point-like patch of plasma located on the
system rotation axis and emitting isotropic power-law radiation (lamp-post
geometry). Full relativistic ray-tracing code in vacuum is used for photon
paths from the corona to the disc and to the observer and from the disc to the
observer. The ionisation of the disc is set for each radius according to the
amount of the incident primary flux and the density of the accretion disc. In
this paper we comment on some preliminary results obtained through the analysis
of X-ray reverberation time-lags from 1H 0707-495 and IRAS 13224-3809.
|
[{'version': 'v1', 'created': 'Sat, 14 Jan 2017 11:24:10 GMT'}]
|
2017-01-17
|
[array(['Caballero-Garcia', 'M. D.', ''], dtype=object)
array(['Dovciak', 'M.', ''], dtype=object)
array(['Papadakis', 'I.', ''], dtype=object)
array(['Epitropakis', 'A.', ''], dtype=object)
array(['Svoboda', 'J.', ''], dtype=object)
array(['Kara', 'E.', ''], dtype=object)
array(['Karas', 'V.', ''], dtype=object)]
|
17,721 |
1604.04678
|
Hamid Tizhoosh
|
Hamid R. Tizhoosh, Ahmed A. Othman
|
Anatomy-Aware Measurement of Segmentation Accuracy
|
To appear in SPIE Medical Imaging 2016
| null |
10.1117/12.2214869
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Quantifying the accuracy of segmentation and manual delineation of organs,
tissue types and tumors in medical images is a necessary measurement that
suffers from multiple problems. One major shortcoming of all accuracy measures
is that they neglect the anatomical significance or relevance of different
zones within a given segment. Hence, existing accuracy metrics measure the
overlap of a given segment with a ground-truth without any anatomical
discrimination inside the segment. For instance, if we understand the rectal
wall or urethral sphincter as anatomical zones, then current accuracy measures
ignore their significance when they are applied to assess the quality of the
prostate gland segments. In this paper, we propose an anatomy-aware measurement
scheme for segmentation accuracy of medical images. The idea is to create a
``master gold'' based on a consensus shape containing not just the outline of
the segment but also the outlines of the internal zones if existent or
relevant. To apply this new approach to accuracy measurement, we introduce the
anatomy-aware extensions of both Dice coefficient and Jaccard index and
investigate their effect using 500 synthetic prostate ultrasound images with 20
different segments for each image. We show that through anatomy-sensitive
calculation of segmentation accuracy, namely by considering relevant anatomical
zones, not only the measurement of individual users can change but also the
ranking of users' segmentation skills may require reordering.
|
[{'version': 'v1', 'created': 'Sat, 16 Apr 2016 01:49:22 GMT'}]
|
2016-04-19
|
[array(['Tizhoosh', 'Hamid R.', ''], dtype=object)
array(['Othman', 'Ahmed A.', ''], dtype=object)]
|
17,722 |
1410.4472
|
Hans-Thomas Elze
|
Aniello Lampo, Lorenzo Fratino and Hans-Thomas Elze
|
Mirror-induced decoherence in hybrid quantum-classical theory
|
8 pages, 2 figures; accepted for publication in Physical Review A
|
Phys. Rev. A. 90, 042120 (2014)
|
10.1103/PhysRevA.90.042120
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We re-analyse the optomechanical interferometer experiment proposed by
Marshall, Simon, Penrose and Bouwmeester with the help of a recently developed
quantum-classical hybrid theory. This leads to an alternative evaluation of the
mirror induced decoherence. Surprisingly, we find that it behaves essentially
in the same way for suitable initial conditions and experimentally relevant
parameters, no matter whether the mirror is considered a classical or quantum
mechanical object. We discuss the parameter ranges where this result holds and
possible implications for a test of spontaneous collapse models, for which this
experiment has been designed.
|
[{'version': 'v1', 'created': 'Thu, 16 Oct 2014 15:54:56 GMT'}]
|
2014-12-24
|
[array(['Lampo', 'Aniello', ''], dtype=object)
array(['Fratino', 'Lorenzo', ''], dtype=object)
array(['Elze', 'Hans-Thomas', ''], dtype=object)]
|
17,723 |
2209.11185
|
Srimoyee Samaddar
|
Srimoyee Samaddar, Karthik Venkataramani, Justin Yonker, Scott. M.
Bailey
|
The Role of High Energy Photoelectrons on the Dissociation of Molecular
Nitrogen in Earth's Ionosphere
| null | null | null | null |
physics.chem-ph astro-ph.EP physics.ao-ph
|
http://creativecommons.org/licenses/by-sa/4.0/
|
Soft x-ray radiation from the sun is responsible for the production of high
energy photoelectrons in the D and E regions of the ionosphere, where they
deposit most of their ionization energy. The photoelectrons created by this
process are the main drivers for dissociation of Nitrogen molecule ($N_2$)
below 200 km. The dissociation of N2 is one of main mechanisms of the
production of Nitric Oxide (NO), an important minor constituent at these
altitudes. In order to estimate the dissociation rate of N2 we need its
dissociation cross-sections. The dissociation cross-sections for N2 by
photoelectrons are primarily estimated from the cross-sections of its
excitation states using predissociation factors and dissociative ionization
channels. The lack of cross-sections data, particularly at high electron
energies and of higher excited states of $N_2$ and $N_2^+$, introduces
uncertainty in the dissociation rate calculation, which subsequently leads to
uncertainties in the NO production rate from this source. In this work, we have
fitted updated electron impact cross-sections data and by applying
predissociation factors obtained, updated dissociation rates of N2 due to high
energy photoelectrons. The new dissociation rates of N2 are compared to the
dissociation rates obtained from Solomon and Qian [2005]. The new dissociation
cross-sections and rates are estimated to be about 30% lower than the Solomon
and Qian [2005] model. Simulations using a parameterized version of the updated
dissociation rates in the Atmospheric Chemistry and Energetics (ACE1D) model
leads to a $20%$ increase in NO density at the altitudes below 100 km is
observed.
|
[{'version': 'v1', 'created': 'Tue, 20 Sep 2022 22:21:17 GMT'}
{'version': 'v2', 'created': 'Fri, 18 Nov 2022 07:07:23 GMT'}]
|
2022-11-21
|
[array(['Samaddar', 'Srimoyee', ''], dtype=object)
array(['Venkataramani', 'Karthik', ''], dtype=object)
array(['Yonker', 'Justin', ''], dtype=object)
array(['Bailey', 'Scott. M.', ''], dtype=object)]
|
17,724 |
2212.02073
|
Zhen Liu
|
Zhuofan Zhang, Zhen Liu, Bing Zeng, Shuaicheng Liu
|
Minimum Latency Deep Online Video Stabilization
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a novel camera path optimization framework for the task of online
video stabilization. Typically, a stabilization pipeline consists of three
steps: motion estimating, path smoothing, and novel view rendering. Most
previous methods concentrate on motion estimation, proposing various global or
local motion models. In contrast, path optimization receives relatively less
attention, especially in the important online setting, where no future frames
are available. In this work, we adopt recent off-the-shelf high-quality deep
motion models for the motion estimation to recover the camera trajectory and
focus on the latter two steps. Our network takes a short 2D camera path in a
sliding window as input and outputs the stabilizing warp field of the last
frame in the window, which warps the coming frame to its stabilized position. A
hybrid loss is well-defined to constrain the spatial and temporal consistency.
In addition, we build a motion dataset that contains stable and unstable motion
pairs for the training. Extensive experiments demonstrate that our approach
significantly outperforms state-of-the-art online methods both qualitatively
and quantitatively and achieves comparable performance to offline methods.
|
[{'version': 'v1', 'created': 'Mon, 5 Dec 2022 07:37:32 GMT'}]
|
2022-12-06
|
[array(['Zhang', 'Zhuofan', ''], dtype=object)
array(['Liu', 'Zhen', ''], dtype=object)
array(['Zeng', 'Bing', ''], dtype=object)
array(['Liu', 'Shuaicheng', ''], dtype=object)]
|
17,725 |
1301.0578
|
Tomas Kocka
|
Tomas Kocka, Nevin Lianwen Zhang
|
Dimension Correction for Hierarchical Latent Class Models
|
Appears in Proceedings of the Eighteenth Conference on Uncertainty in
Artificial Intelligence (UAI2002)
| null | null |
UAI-P-2002-PG-267-274
|
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Model complexity is an important factor to consider when selecting among
graphical models. When all variables are observed, the complexity of a model
can be measured by its standard dimension, i.e. the number of independent
parameters. When hidden variables are present, however, standard dimension
might no longer be appropriate. One should instead use effective dimension
(Geiger et al. 1996). This paper is concerned with the computation of effective
dimension. First we present an upper bound on the effective dimension of a
latent class (LC) model. This bound is tight and its computation is easy. We
then consider a generalization of LC models called hierarchical latent class
(HLC) models (Zhang 2002). We show that the effective dimension of an HLC model
can be obtained from the effective dimensions of some related LC models. We
also demonstrate empirically that using effective dimension in place of
standard dimension improves the quality of models learned from data.
|
[{'version': 'v1', 'created': 'Wed, 12 Dec 2012 15:56:54 GMT'}]
|
2013-01-07
|
[array(['Kocka', 'Tomas', ''], dtype=object)
array(['Zhang', 'Nevin Lianwen', ''], dtype=object)]
|
17,726 |
1407.5504
|
Lorenzo Di Michele
|
Lucia Parolini, Bortolo M. Mognetti, Jurij Kotar, Erika Eiser, Pietro
Cicuta and Lorenzo Di Michele
|
Volume and porosity thermal regulation in lipid mesophases by coupling
mobile ligands to soft membranes
| null |
Nature Communications 6:5948 (2015)
|
10.1038/ncomms6948
| null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Short DNA linkers are increasingly being exploited for driving specific
self-assembly of Brownian objects. DNA-functionalised colloids can assemble
into ordered or amorphous materials with tailored morphology. Recently, the
same approach has been applied to compliant units, including emulsion droplets
and lipid vesicles. The liquid structure of these substrates introduces new
degrees of freedom: the tethers can diffuse and rearrange, radically changing
the physics of the interactions. Unlike droplets, vesicles are extremely
deformable and DNA-mediated adhesion causes significant shape adjustments. We
investigate experimentally the thermal response of pairs and networks of
DNA-tethered liposomes and observe two intriguing and possibly useful
collective properties: negative thermal expansion and tuneable porosity of the
liposome networks. A model providing a thorough understanding of this
unexpected phenomenon is developed, explaining the emergent properties out of
the interplay between the temperature-dependent deformability of the vesicles
and the DNA-mediated adhesive forces.
|
[{'version': 'v1', 'created': 'Mon, 21 Jul 2014 14:16:19 GMT'}
{'version': 'v2', 'created': 'Fri, 9 Jan 2015 17:49:27 GMT'}]
|
2015-01-12
|
[array(['Parolini', 'Lucia', ''], dtype=object)
array(['Mognetti', 'Bortolo M.', ''], dtype=object)
array(['Kotar', 'Jurij', ''], dtype=object)
array(['Eiser', 'Erika', ''], dtype=object)
array(['Cicuta', 'Pietro', ''], dtype=object)
array(['Di Michele', 'Lorenzo', ''], dtype=object)]
|
17,727 |
1206.2456
|
Lukas Pottmeyer
|
Lukas Pottmeyer
|
Heights and totally real numbers
|
Major changes regarding the first version. E.g. the last chapter was
canceled
|
Rend. Lincei Math. Appl. 24 (2013), pp.471-483
|
10.4171/RLM/662
| null |
math.NT math.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
1973 Schinzel proved that the standard logarithmic height h on the maximal
totally real field extension of the rationals is either zero or bounded from
below by a positive constant. In this paper we study this property for
canonical heights associated to rational functions and the corresponding
dynamical system on the affine line. At the end, we will give a few remarks on
the behavior of h on finite extensions of the maximal totally real field.
|
[{'version': 'v1', 'created': 'Tue, 12 Jun 2012 08:27:50 GMT'}
{'version': 'v2', 'created': 'Mon, 18 Nov 2013 18:42:02 GMT'}]
|
2013-11-19
|
[array(['Pottmeyer', 'Lukas', ''], dtype=object)]
|
17,728 |
2109.08280
|
Paxton Turner
|
Sinho Chewi, Patrik Gerber, Philippe Rigollet, Paxton Turner
|
Gaussian discrepancy: a probabilistic relaxation of vector balancing
| null | null | null | null |
cs.DM cs.DS math.PR
|
http://creativecommons.org/licenses/by/4.0/
|
We introduce a novel relaxation of combinatorial discrepancy called Gaussian
discrepancy, whereby binary signings are replaced with correlated standard
Gaussian random variables. This relaxation effectively reformulates an
optimization problem over the Boolean hypercube into one over the space of
correlation matrices. We show that Gaussian discrepancy is a tighter relaxation
than the previously studied vector and spherical discrepancy problems, and we
construct a fast online algorithm that achieves a version of the Banaszczyk
bound for Gaussian discrepancy. This work also raises new questions such as the
Koml\'{o}s conjecture for Gaussian discrepancy, which may shed light on
classical discrepancy problems.
|
[{'version': 'v1', 'created': 'Fri, 17 Sep 2021 01:43:41 GMT'}
{'version': 'v2', 'created': 'Wed, 10 Aug 2022 01:12:50 GMT'}]
|
2022-08-11
|
[array(['Chewi', 'Sinho', ''], dtype=object)
array(['Gerber', 'Patrik', ''], dtype=object)
array(['Rigollet', 'Philippe', ''], dtype=object)
array(['Turner', 'Paxton', ''], dtype=object)]
|
17,729 |
1409.7941
|
David Holcman
|
K. Reynaud Z. Schuss, N. Rouach, D. Holcman
|
Why so many sperm cells?
|
6 pages
| null | null | null |
q-bio.CB physics.bio-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A key limiting step in fertility is the search for the oocyte by spermatozoa.
Initially, there are tens of millions of sperm cells, but a single one will
make it to the oocyte. This may be one of the most severe selection processes
designed by evolution, whose role is yet to be understood. Why is it that such
a huge redundancy is required and what does that mean for the search process?
we propose to discuss here these questions and consequently a new line of
interdisciplinary research needed to find possible answers.
|
[{'version': 'v1', 'created': 'Sun, 28 Sep 2014 18:44:45 GMT'}]
|
2014-09-30
|
[array(['Schuss', 'K. Reynaud Z.', ''], dtype=object)
array(['Rouach', 'N.', ''], dtype=object)
array(['Holcman', 'D.', ''], dtype=object)]
|
17,730 |
1310.1370
|
Serhii Shafranjuk
|
S. E. Shafranjuk
|
Magneto-thermoelectric current induced by phonon drag in low-dimensional
junctions
|
5 pages, 3 figures
| null | null | null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We examine splitting the heat flow in a low-dimensional junction under
influence an external d.c. magnetic field. The junction is a crossing between
the narrow single atomic layer stripe (or a nanotube) of a semiconductor C with
a metal stripe N (C/N-knot). External source of heat injects the
non-equilibrium (NE) phonons, electrons, and holes into C which then propagate
in direction the C/N-knot. Most of the heat is carried by NE phonons which drag
additional electron and hole excitations along C. In vicinity the C/N-knot, the
Lorentz force pulls the charge carriers from C to N thus inducing a substantial
lateral magneto-thermoelectric electric current (MTEC) along N.
|
[{'version': 'v1', 'created': 'Fri, 4 Oct 2013 18:42:00 GMT'}]
|
2013-10-07
|
[array(['Shafranjuk', 'S. E.', ''], dtype=object)]
|
17,731 |
1111.3442
|
Shu Chen
|
Li Wang, Zhihao Xu, Shu Chen
|
Fermi super-Tonks-Girardeau state for attractive Fermi gases in an
optical lattice
|
7 pages, 7 figures
|
Eur. Phys. J. D 66, 265 (2012)
|
10.1140/epjd/e2012-30163-8
| null |
cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We demonstrate that a kind of highly excited state of strongly attractive
Hubbard model, named of Fermi super-Tonks-Girardeau state, can be realized in
the spin-1/2 Fermi optical lattice system by a sudden switch of interaction
from the strongly repulsive regime to the strongly attractive regime. In
contrast to the ground state of the attractive Hubbard model, such a state is
the lowest scattering state with no pairing between attractive fermions. With
the aid of Bethe-ansatz method, we calculate energies of both the Fermi
Tonks-Girardeau gas and the Fermi super-Tonks-Girardeau state of spin-1/2
ultracold fermions and show that both energies approach to the same limit as
the strength of the interaction goes to infinity. By exactly solving the quench
dynamics of the Hubbard model, we demonstrate that the Fermi
super-Tonks-Girardeau state can be transferred from the initial repulsive
ground state very efficiently. This allows the experimental study of properties
of Fermi super-Tonks-Girardeau gas in optical lattices.
|
[{'version': 'v1', 'created': 'Tue, 15 Nov 2011 07:10:57 GMT'}
{'version': 'v2', 'created': 'Thu, 1 Mar 2012 01:01:30 GMT'}
{'version': 'v3', 'created': 'Mon, 3 Dec 2012 16:00:13 GMT'}]
|
2012-12-04
|
[array(['Wang', 'Li', ''], dtype=object)
array(['Xu', 'Zhihao', ''], dtype=object)
array(['Chen', 'Shu', ''], dtype=object)]
|
17,732 |
1411.0481
|
Hamid Bagheri
|
Hamid Bagheri
|
Synthesis from Formal Partial Abstractions
|
Hamid Bagheri, "Synthesis from Formal Partial Abstractions," PhD
thesis, University of Virginia, 2013
| null | null | null |
cs.SE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Developing complex software systems is costly, time-consuming and
error-prone. Model- driven development (MDD) promises to improve software
productivity, timeliness, quality and cost through the transformation of
abstract application models to code-level implementations. However, it remains
unreasonably difficult to build the modeling languages and translators required
for software synthesis. This difficulty, in turns, limits the applicability of
MDD, and makes it hard to achieve reliability in MDD tools. This dissertation
research seeks to reduce the cost, broaden the applicability, and increase the
quality of model-driven development systems by embedding modeling languages
within established formal languages and by using the analyzers provided with
such languages for synthesis purposes to reduce the need for hand coding of
translators. This dissertation, in particular, explores the proposed approach
using relational logic as expressed in Alloy as the general specification
language, and the Alloy Analyzer as the general-purpose analyzer. Synthesis is
thus driven by finite-domain constraint satisfaction. One important aspect of
this work is its focus on partial specifications of particular aspects of the
system, such as application architectures and target platforms, and synthesis
of partial code bases from such specifications. Contributions of this work
include novel insights, methods and tools for (1) synthesizing architectural
models from abstract application models; (2) synthesizing partial,
platform-specific application frameworks from application architectures; and
(3) synthesizing object-relational mapping tradeoff spaces and database schemas
for database-backed object-oriented applications.
|
[{'version': 'v1', 'created': 'Mon, 3 Nov 2014 13:35:11 GMT'}]
|
2014-11-04
|
[array(['Bagheri', 'Hamid', ''], dtype=object)]
|
17,733 |
2110.08202
|
Jana Kemnitz
|
Stephanie Holly, Thomas Hiessl, Safoura Rezapour Lakani, Daniel
Schall, Clemens Heitzinger, Jana Kemnitz
|
Evaluation of Hyperparameter-Optimization Approaches in an Industrial
Federated Learning System
|
This paper is accepted at the IDSC https://idsc.at/ and will be
published by Springer. The Version uploaded is before the peer review
process. The link to the final version will be updated as soon as the paper
is published. Figure one was corrected on 2021/10/20
| null | null | null |
cs.LG cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Federated Learning (FL) decouples model training from the need for direct
access to the data and allows organizations to collaborate with industry
partners to reach a satisfying level of performance without sharing vulnerable
business information. The performance of a machine learning algorithm is highly
sensitive to the choice of its hyperparameters. In an FL setting,
hyperparameter optimization poses new challenges. In this work, we investigated
the impact of different hyperparameter optimization approaches in an FL system.
In an effort to reduce communication costs, a critical bottleneck in FL, we
investigated a local hyperparameter optimization approach that -- in contrast
to a global hyperparameter optimization approach -- allows every client to have
its own hyperparameter configuration. We implemented these approaches based on
grid search and Bayesian optimization and evaluated the algorithms on the MNIST
data set using an i.i.d. partition and on an Internet of Things (IoT) sensor
based industrial data set using a non-i.i.d. partition.
|
[{'version': 'v1', 'created': 'Fri, 15 Oct 2021 17:01:40 GMT'}
{'version': 'v2', 'created': 'Wed, 20 Oct 2021 11:54:12 GMT'}]
|
2021-10-22
|
[array(['Holly', 'Stephanie', ''], dtype=object)
array(['Hiessl', 'Thomas', ''], dtype=object)
array(['Lakani', 'Safoura Rezapour', ''], dtype=object)
array(['Schall', 'Daniel', ''], dtype=object)
array(['Heitzinger', 'Clemens', ''], dtype=object)
array(['Kemnitz', 'Jana', ''], dtype=object)]
|
17,734 |
2107.02854
|
Seung Yeon Shin
|
Seung Yeon Shin, Sungwon Lee, Ronald M. Summers
|
Unsupervised Domain Adaptation for Small Bowel Segmentation using
Disentangled Representation
|
Accepted to MICCAI 2021
| null | null | null |
eess.IV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a novel unsupervised domain adaptation method for small bowel
segmentation based on feature disentanglement. To make the domain adaptation
more controllable, we disentangle intensity and non-intensity features within a
unique two-stream auto-encoding architecture, and selectively adapt the
non-intensity features that are believed to be more transferable across
domains. The segmentation prediction is performed by aggregating the
disentangled features. We evaluated our method using intravenous
contrast-enhanced abdominal CT scans with and without oral contrast, which are
used as source and target domains, respectively. The proposed method showed
clear improvements in terms of three different metrics compared to other domain
adaptation methods that are without the feature disentanglement. The method
brings small bowel segmentation closer to clinical application.
|
[{'version': 'v1', 'created': 'Tue, 6 Jul 2021 19:45:57 GMT'}]
|
2021-07-08
|
[array(['Shin', 'Seung Yeon', ''], dtype=object)
array(['Lee', 'Sungwon', ''], dtype=object)
array(['Summers', 'Ronald M.', ''], dtype=object)]
|
17,735 |
1812.03866
|
Daniel Faes
|
D. M. Faes, A. Souza, D. R. Bortoletto and M. C. P. Almeida
|
Systems Enginnering applied to spectroscopy of the ELTs: The Conceptual
Design phase of GMACS
|
4 pages, 2 figures, special mention at XLI SAB meeting. arXiv admin
note: substantial text overlap with arXiv:1806.06390
|
Boletim da Sociedade Astronomica Brasileira 2018, 30, 1, pg. 211
| null | null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An important tool for the development of the next generation of extremely
large telescopes (ELTs) is the Systems Engineering (SE). GMACS is the
first-generation multi-object spectrograph working at visible wavelengths for
the Giant Magellan Telescope (GMT). The aim is to discuss the application of SE
in ground-based astronomy for multi-object spectrographs. For this, it is
presented the SE of the GMACS spectrograph, currently on its Conceptual Design
phase. SE provide means to assist the management of complex projects, and in
the case of GMACS, to ensure its success when in operation, maximizing the
scientific potential of GMT.
|
[{'version': 'v1', 'created': 'Fri, 7 Dec 2018 10:52:24 GMT'}]
|
2018-12-11
|
[array(['Faes', 'D. M.', ''], dtype=object)
array(['Souza', 'A.', ''], dtype=object)
array(['Bortoletto', 'D. R.', ''], dtype=object)
array(['Almeida', 'M. C. P.', ''], dtype=object)]
|
17,736 |
1903.05266
|
Tu Le
|
John A. Stankovic, Tu Le, Abdeltawab Hendawi, Yuan Tian
|
Hardware/Software Security Patches for Internet of Trillions of Things
| null | null | null | null |
cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
With the rapid development of the Internet of Things, there are many
interacting devices and applications. One crucial challenge is how to provide
security. Our proposal for a new direction is to create "smart buttons" and
collections of them called "smart blankets" as hardware/software security
patches rather than software-only patches.
|
[{'version': 'v1', 'created': 'Tue, 12 Mar 2019 23:46:30 GMT'}]
|
2019-03-14
|
[array(['Stankovic', 'John A.', ''], dtype=object)
array(['Le', 'Tu', ''], dtype=object)
array(['Hendawi', 'Abdeltawab', ''], dtype=object)
array(['Tian', 'Yuan', ''], dtype=object)]
|
17,737 |
2002.02588
|
Haijiang Liu
|
Haijiang Liu, Yingying Cao, Yuanji Xu, D. J. Gawryluk, E.
Pomjakushina, S.-Y. Gao, Pavel Dudin, M. Shi, Yi-feng Yang, and H. Ding
|
Observation of flat bands due to band hybridization in 3d-electron
heavy-fermion compound CaCu3Ru4O12
| null |
Phys. Rev. B 102, 035111 (2020)
|
10.1103/PhysRevB.102.035111
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report angle-resolved photoemission spectroscopy and first-principles
numerical calculations for the band structure evolution of the 3d heavy-fermion
compound CaCu3Ru4O12. Below 200 K, we observed an emergent hybridization gap
between the Cu 3d electron-like band and the Ru 4d hole-like band and the
resulting flat band features near the Fermi energy centered around the
Brillouin zone corner. Our results confirm the non-Kondo nature of CaCu3Ru4O12,
in which the Cu 3dxy electrons are less correlated and not in the Kondo limit.
Comparison between theory and experiment also suggests that other mechanism
such as nonlocal interactions or spin fluctuations beyond the local dynamical
mean-field theory may be needed in order to give a quantitative explanation of
the peculiar properties in this material.
|
[{'version': 'v1', 'created': 'Fri, 7 Feb 2020 02:24:38 GMT'}]
|
2020-07-15
|
[array(['Liu', 'Haijiang', ''], dtype=object)
array(['Cao', 'Yingying', ''], dtype=object)
array(['Xu', 'Yuanji', ''], dtype=object)
array(['Gawryluk', 'D. J.', ''], dtype=object)
array(['Pomjakushina', 'E.', ''], dtype=object)
array(['Gao', 'S. -Y.', ''], dtype=object)
array(['Dudin', 'Pavel', ''], dtype=object)
array(['Shi', 'M.', ''], dtype=object)
array(['Yang', 'Yi-feng', ''], dtype=object)
array(['Ding', 'H.', ''], dtype=object)]
|
17,738 |
1906.07776
|
Lucas S\'a
|
Lucas S\'a and Jorge Vieira
|
Self-focusing of multiple interacting Laguerre-Gauss beams in Kerr media
|
10 pages, 3 figures. v2: minor corrections
|
Phys. Rev. A 100 013836 (2019)
|
10.1103/PhysRevA.100.013836
| null |
physics.optics physics.plasm-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using a variational approach, we obtain the self-focusing critical power for
a single and for any number of interacting Laguerre-Gauss beams propagating in
a Kerr nonlinear optical medium. As is known, the critical power for freely
propagating higher-order modes is always greater than that of the fundamental
Gaussian mode. Here, we generalize that result for an arbitrary incoherent
superposition of Laguerre-Gauss beams, adding interactions between them. This
leads to a vast and rich spectrum of self-focusing phenomena, which is absent
in the single-beam case. Specifically, we find that interactions between
different modes may increase or decrease the required critical power relative
to the sum of individual powers. In particular, high-orbital angular momentum
modes can be focused with less power in the presence of low-orbital angular
momentum beams than when propagating alone. The decrease in required critical
power can be made arbitrarily large by choosing the appropriate combinations of
modes. Besides, in the presence of interactions, an equilibrium configuration
of stationary spot-size for all modes in a superposition may not even exist, a
fundamental difference to the single-beam case in which a critical power for
self-focusing always exists.
|
[{'version': 'v1', 'created': 'Tue, 18 Jun 2019 19:24:27 GMT'}
{'version': 'v2', 'created': 'Wed, 17 Jul 2019 15:54:51 GMT'}]
|
2019-07-18
|
[array(['Sá', 'Lucas', ''], dtype=object)
array(['Vieira', 'Jorge', ''], dtype=object)]
|
17,739 |
gr-qc/0103113
|
Hernando Quevedo
|
Hernando Quevedo
|
The Big Bang in $T^3$ Gowdy Cosmological Models
|
10 pages, latex, no figures
| null | null | null |
gr-qc
| null |
We establish a formal relationship between stationary axisymmetric spacetimes
and $T^3$ Gowdy cosmological models which allows us to derive several
preliminary results about the generation of exact cosmological solutions and
their possible behavior near the initial singularity. In particular, we argue
that it is possible to generate a Gowdy model from its values at the
singularity and that this could be used to construct cosmological solutions
with any desired spatial behavior at the Big Bang.
|
[{'version': 'v1', 'created': 'Fri, 30 Mar 2001 19:49:56 GMT'}]
|
2007-05-23
|
[array(['Quevedo', 'Hernando', ''], dtype=object)]
|
17,740 |
1808.00837
|
Junxian Li
|
Junxian Li
|
A binary quadratic Titchmarsh divisor problem
| null | null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a binary quadratic variant of the Titchmarsh divisor problem and
give an asymptotic formula for $\sum_{p^2+q^2\leq N} \tau(p^2+q^2+1)$, where
$p,q$ are primes.
|
[{'version': 'v1', 'created': 'Thu, 2 Aug 2018 14:37:37 GMT'}
{'version': 'v2', 'created': 'Sat, 11 Aug 2018 14:01:25 GMT'}]
|
2018-08-14
|
[array(['Li', 'Junxian', ''], dtype=object)]
|
17,741 |
1705.07708
|
Kate Jones
|
Kate L. Jones (for the VANDLE, GODDESS, HAGRiD, and CLARION-BareBall
Collaborations)
|
New directions with transfer reactions
|
8 pages, 3 figures, Proceedings of the 6th International Conference
on Fission and Properties of Neutron-rich Nuclei, Sanibel, Florida
| null | null | null |
nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Over the last two decades transfer reactions have seen a resurgence following
developments in methods to use them with exotic beams. An important step in
this evolution was the ability to perform the (d,p) reaction on fission
fragment beams using the inverse kinematics technique, built on the experience
with light beams. There has been renewed interest in using ($^9$Be, $^8$Be) and
($^{13}$C, $^{12}$C) reactions to selectively populate single-particle like
states that can be studied via their subsequent decay. These reactions have
been successfully utilized in the $^{132}$Sn region. Additionally, our
collaboration has recently performed experiments with GODDESS, a combination of
the full ORRUBA detector and Gammasphere arrays. Another new direction is
measuring neutrons from (d,n) reactions, performed in inverse kinematics, with
the VANDLE array of plastic scintillators. Presented below is an overview of
these new techniques and some of the early data from recent experiments.
|
[{'version': 'v1', 'created': 'Mon, 22 May 2017 13:19:36 GMT'}]
|
2019-08-15
|
[array(['Jones', 'Kate L.', '',
'for the VANDLE, GODDESS, HAGRiD, and CLARION-BareBall\n Collaborations'],
dtype=object) ]
|
17,742 |
1204.4546
|
Murat Caglar
|
Murat \c{C}a\u{g}lar and Halit Orhan
|
On neighborhood and partial sums problem for generalized Sakaguchi type
functions
|
11 pages, submitted to a journal for publication
| null | null | null |
math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the present investigation, we introduce a new class
k-US_{s}^{{\eta}}({\lambda},{\mu},{\gamma},t) of analytic functions in the open
unit disc U with negative coefficients. The object of the present paper is to
determine coefficient estimates, neighborhoods and partial sums for functions
f(z) belonging to this class.
|
[{'version': 'v1', 'created': 'Fri, 20 Apr 2012 07:01:28 GMT'}
{'version': 'v2', 'created': 'Wed, 29 Aug 2012 09:08:10 GMT'}]
|
2012-08-30
|
[array(['Çağlar', 'Murat', ''], dtype=object)
array(['Orhan', 'Halit', ''], dtype=object)]
|
17,743 |
astro-ph/9902033
|
John Magorrian
|
John Magorrian (CITA)
|
Kinematical signatures of hidden stellar discs
|
7 pages, 7 figures, uses mn.tex
|
Mon.Not.Roy.Astron.Soc. 302 (1999) 530
|
10.1046/j.1365-8711.1999.02135.x
| null |
astro-ph
| null |
The deprojection of the surface brightness distribution of an axisymmetric
galaxy does not have a unique solution unless the galaxy is viewed precisely
edge-on. I present an algorithm that finds the full range of smooth
axisymmetric density distributions consistent with a given surface brightness
distribution and inclination angle, and use it to investigate the effects of
this non-uniqueness on the line-of-sight velocity profiles (VPs) of
two-integral models of both real and toy disky galaxies viewed at a range of
inclination angles. Photometrically invisible face-on disks leave very clear
signatures in the minor-axis VPs of the models (Gauss--Hermite coefficients
h_4>0.1), provided the disk-to-bulge ratio is greater than about 3%. I discuss
the implications of these hitherto neglected disks for dynamical modelling.
|
[{'version': 'v1', 'created': 'Tue, 2 Feb 1999 09:56:38 GMT'}]
|
2009-10-31
|
[array(['Magorrian', 'John', '', 'CITA'], dtype=object)]
|
17,744 |
1810.12258
|
Hidefumi Ohsugi
|
Hidefumi Ohsugi and Akiyoshi Tsuchiya
|
Reflexive polytopes arising from bipartite graphs with
$\gamma$-positivity associated to interior polynomials
|
20 pages, 5 figures, many explanations are added, References are
added and updated
|
Selecta Mathematica. New Series 26 (2020), 59
|
10.1007/s00029-020-00588-0
| null |
math.CO math.AC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we introduce polytopes ${\mathcal B}_G$ arising from root
systems $B_n$ and finite graphs $G$, and study their combinatorial and
algebraic properties. In particular, it is shown that ${\mathcal B}_G$ is
reflexive if and only if $G$ is bipartite. Moreover, in the case, ${\mathcal
B}_G$ has a regular unimodular triangulation. This implies that the
$h^*$-polynomial of ${\mathcal B}_G$ is palindromic and unimodal when $G$ is
bipartite. Furthermore, we discuss stronger properties, namely the
$\gamma$-positivity and the real-rootedness of the $h^*$-polynomials. In fact,
if $G$ is bipartite, then the $h^*$-polynomial of ${\mathcal B}_G$ is
$\gamma$-positive and its $\gamma$-polynomial is given by an interior
polynomial (a version of the Tutte polynomial for a hypergraph). The
$h^*$-polynomial is real-rooted if and only if the corresponding interior
polynomial is real-rooted. From a counterexample to Neggers--Stanley
conjecture, we construct a bipartite graph $G$ whose $h^*$-polynomial is not
real-rooted but $\gamma$-positive, and coincides with the $h$-polynomial of a
flag triangulation of a sphere.
|
[{'version': 'v1', 'created': 'Mon, 29 Oct 2018 17:11:15 GMT'}
{'version': 'v2', 'created': 'Thu, 1 Nov 2018 13:01:19 GMT'}
{'version': 'v3', 'created': 'Sat, 27 Apr 2019 18:18:23 GMT'}
{'version': 'v4', 'created': 'Thu, 14 May 2020 17:24:44 GMT'}]
|
2020-09-07
|
[array(['Ohsugi', 'Hidefumi', ''], dtype=object)
array(['Tsuchiya', 'Akiyoshi', ''], dtype=object)]
|
17,745 |
1608.05469
|
Nesar Ramachandra
|
Nesar S. Ramachandra, Sergei F. Shandarin
|
Topology and geometry of the dark matter web: a multistream view
|
16 pages, 13 figures. Matches version accepted by MNRAS
|
Monthly Notices of the Royal Astronomical Society (2017) 467 (2):
1748-1762
|
10.1093/mnras/stx183
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Topological connections in the single-streaming voids and multistreaming
filaments and walls reveal a cosmic web structure different from traditional
mass density fields. A single void structure not only percolates the
multistream field in all the directions, but also occupies over 99 per cent of
all the single-streaming regions. Sub-grid analyses on scales smaller than
simulation resolution reveal tiny pockets of voids that are isolated by
membranes of the structure. For the multistreaming excursion sets, the
percolating structure is significantly thinner than the filaments in
over-density excursion approach.
Hessian eigenvalues of the multistream field are used as local geometrical
indicators of dark matter structures. Single-streaming regions have most of the
zero eigenvalues. Parameter-free conditions on the eigenvalues in the
multistream region may be used to delineate primitive geometries with
concavities corresponding to filaments, walls and haloes.
|
[{'version': 'v1', 'created': 'Fri, 19 Aug 2016 01:52:43 GMT'}
{'version': 'v2', 'created': 'Thu, 4 May 2017 19:52:26 GMT'}]
|
2017-05-08
|
[array(['Ramachandra', 'Nesar S.', ''], dtype=object)
array(['Shandarin', 'Sergei F.', ''], dtype=object)]
|
17,746 |
1306.3783
|
Andrea Scharnhorst
|
Richard Smiraglia, Andrea Scharnhorst, Almila Akdag Salah and Cheng
Gao
|
UDC in Action
|
Accepted for the UDCC seminar 2013
| null | null | null |
cs.DL physics.soc-ph
|
http://creativecommons.org/licenses/by/3.0/
|
The UDC (Universal Decimal Classification) is not only a classification
language with a long history; it also presents a complex cognitive system
worthy of the attention of complexity theory. The elements of the UDC: classes,
auxiliaries, and operations are combined into symbolic strings, which in
essence represent a complex networks of concepts. This network forms a backbone
of ordering of knowledge and at the same time allows expression of different
perspectives on various products of human knowledge production. In this paper
we look at UDC strings derived from the holdings of libraries. In particular we
analyse the subject headings of holdings of the university library in Leuven,
and an extraction of UDC numbers from the OCLC WorldCat. Comparing those sets
with the Master Reference File, we look into the length of strings, the
occurrence of different auxiliary signs, and the resulting connections between
UDC classes. We apply methods and representations from complexity theory.
Mapping out basic statistics on UDC classes as used in libraries from a point
of view of complexity theory bears different benefits. Deploying its structure
could serve as an overview and basic information for users among the nature and
focus of specific collections. A closer view into combined UDC numbers reveals
the complex nature of the UDC as an example for a knowledge ordering system,
which deserves future exploration from a complexity theoretical perspective.
|
[{'version': 'v1', 'created': 'Mon, 17 Jun 2013 09:18:27 GMT'}]
|
2013-06-18
|
[array(['Smiraglia', 'Richard', ''], dtype=object)
array(['Scharnhorst', 'Andrea', ''], dtype=object)
array(['Salah', 'Almila Akdag', ''], dtype=object)
array(['Gao', 'Cheng', ''], dtype=object)]
|
17,747 |
2109.14740
|
Luciano Mari
|
Greg\'orio Pacelli F. Bessa, Luqu\'esio Petrola de M. Jorge, Luciano
Mari
|
On the principal eigenvalue of the truncated Laplacian, and submanifolds
with bounded mean curvature
|
17 pages, typos corrected. Accepted in Matem\'atica Contempor\^anea,
volume in honor of Renato Tribuzy for his 75th birthday. Package axessibility
included to make the paper available to visually impaired people
| null | null | null |
math.AP math.DG math.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we study the principal eigenvalue $\mu(\mathscr{F}_k^-,E)$ of
the fully nonlinear operator
\[
\mathscr{F}_k^-[u] = \mathcal{P}_k^-(\nabla^2 u) - h |\nabla u|
\] on a set $E \Subset \mathbb{R}^n$, where $h \in [0,\infty)$ and
$\mathcal{P}_k^-(\nabla^2 u)$ is the sum of the smallest $k$ eigenvalues of the
Hessian $\nabla^2 u$. We prove a lower estimate for $\mu(\mathscr{F}_k^-,E)$ in
terms of a generalized Hausdorff measure $\mathscr{H}_\Psi(E)$, for suitable
$\Psi$ depending on $k$, moving some steps in the direction of the
conjecturally sharp estimate
\[
\mu(\mathscr{F}_k^-,E) \ge C \mathscr{H}^k(E)^{-2/k}.
\] The theorem is used to study the spectrum of bounded submanifolds in
$\mathbb{R}^n$, improving on our previous work in the direction of a question
posed by S.T. Yau. In particular, the result applies to solutions of Plateau's
problem for CMC surfaces.
|
[{'version': 'v1', 'created': 'Wed, 29 Sep 2021 22:09:42 GMT'}
{'version': 'v2', 'created': 'Sat, 1 Jan 2022 09:11:46 GMT'}]
|
2022-01-04
|
[array(['Bessa', 'Gregório Pacelli F.', ''], dtype=object)
array(['Jorge', 'Luquésio Petrola de M.', ''], dtype=object)
array(['Mari', 'Luciano', ''], dtype=object)]
|
17,748 |
2109.08952
|
Inkang Kim
|
Inkang Kim, Pierre Pansu and Xueyuan Wan
|
Signature, Toledo invariant and surface group representations in the
real symplectic group
|
64 pages, 3 figures, this paper is merged into Signature and Toledo
invariants for flat unitary bundles over surfaces with boundary;
arXiv:2202.06436
| null | null | null |
math.GT math.DG math.RT math.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, by using Atiyah-Patodi-Singer index theorem, we obtain a
formula for the signature of a flat symplectic vector bundle over a surface
with boundary, which is related to the Toledo invariant of a surface group
representation in the real symplectic group and the Rho invariant on the
boundary. As an application, we obtain a Milnor-Wood type inequality for the
signature. In particular, we give a new proof of the Milnor-Wood inequality for
the Toledo invariant in the case of closed surfaces and obtain some modified
inequalities for the surface with boundary.
|
[{'version': 'v1', 'created': 'Sat, 18 Sep 2021 15:33:27 GMT'}
{'version': 'v2', 'created': 'Tue, 1 Mar 2022 01:01:54 GMT'}]
|
2022-03-02
|
[array(['Kim', 'Inkang', ''], dtype=object)
array(['Pansu', 'Pierre', ''], dtype=object)
array(['Wan', 'Xueyuan', ''], dtype=object)]
|
17,749 |
2202.04696
|
Amir Masoud Jafarpisheh
|
Amir Masoud Jafarpisheh, Mahtab Mirmohseni, and Mohammad Ali
Maddah-Ali
|
Distributed Attribute-based Private Access Control
| null | null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In attribute-based access control, users with certain verified attributes
will gain access to some particular data. Concerning with privacy of the users'
attributes, we study the problem of distributed attribute-based private access
control (DAPAC) with multiple authorities, where each authority will learn and
verify only one of the attributes.
To investigate its fundamental limits, we introduce an information theoretic
DAPAC framework, with $N \in \mathbb{N}$, $N\geq 2$, replicated non-colluding
servers (authorities) and some users. Each user has an attribute vector
$\mathbf{v^*}=(v_1^*, ..., v_N^*)$ of dimension $N$ and is eligible to retrieve
a message $W^{\mathbf{v}^*}$, available in all servers. Each server $n\in [N]$
is able to only observe and verify the $n$'th attribute of a user. In response,
it sends a function of its data to the user. The system must satisfy the
following conditions: (1) Correctness: the user with attribute vector
$\mathbf{v^*}$ is able to retrieve his intended message $W^{\mathbf{v}^*}$ from
the servers' response, (2) Data Secrecy: the user will not learn anything about
the other messages, (3) Attribute Privacy: each Server~$n$ learns nothing
beyond attribute $n$ of the user. The capacity of the DAPAC is defined as the
ratio of the file size and the aggregated size of the responses, maximized over
all feasible schemes. We obtain a lower bound on the capacity of this problem
by proposing an achievable algorithm with rate $\frac{1}{2K}$, where $K$ is the
size of the alphabet of each attribute.
|
[{'version': 'v1', 'created': 'Wed, 9 Feb 2022 19:44:53 GMT'}]
|
2022-02-11
|
[array(['Jafarpisheh', 'Amir Masoud', ''], dtype=object)
array(['Mirmohseni', 'Mahtab', ''], dtype=object)
array(['Maddah-Ali', 'Mohammad Ali', ''], dtype=object)]
|
17,750 |
1903.06652
|
Yufei Zhang
|
Christoph Reisinger, Yufei Zhang
|
Rectified deep neural networks overcome the curse of dimensionality for
nonsmooth value functions in zero-sum games of nonlinear stiff systems
|
This revised version has been accepted for publication in Analysis
and Applications
| null | null | null |
math.NA cs.LG cs.NA math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we establish that for a wide class of controlled stochastic
differential equations (SDEs) with stiff coefficients, the value functions of
corresponding zero-sum games can be represented by a deep artificial neural
network (DNN), whose complexity grows at most polynomially in both the
dimension of the state equation and the reciprocal of the required accuracy.
Such nonlinear stiff systems may arise, for example, from Galerkin
approximations of controlled stochastic partial differential equations (SPDEs),
or controlled PDEs with uncertain initial conditions and source terms. This
implies that DNNs can break the curse of dimensionality in numerical
approximations and optimal control of PDEs and SPDEs. The main ingredient of
our proof is to construct a suitable discrete-time system to effectively
approximate the evolution of the underlying stochastic dynamics. Similar ideas
can also be applied to obtain expression rates of DNNs for value functions
induced by stiff systems with regime switching coefficients and driven by
general L\'{e}vy noise.
|
[{'version': 'v1', 'created': 'Fri, 15 Mar 2019 16:42:52 GMT'}
{'version': 'v2', 'created': 'Wed, 13 May 2020 11:06:33 GMT'}]
|
2020-05-14
|
[array(['Reisinger', 'Christoph', ''], dtype=object)
array(['Zhang', 'Yufei', ''], dtype=object)]
|
17,751 |
1904.02646
|
Luca Razzoli
|
Luca Razzoli and Luca Ghirardi and Ilaria Siloi and Paolo Bordone and
Matteo G. A. Paris
|
Lattice quantum magnetometry
| null |
Phys. Rev. A 99, 062330 (2019)
|
10.1103/PhysRevA.99.062330
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We put forward the idea of lattice quantum magnetometry, i.e. quantum sensing
of magnetic fields by a charged (spinless) particle placed on a finite
two-dimensional lattice. In particular, we focus on the detection of a locally
static transverse magnetic field, either homogeneous or inhomogeneous, by
performing ground state measurements. The system turns out to be of interest as
quantum magnetometer, since it provides a non-negligible quantum Fisher
information (QFI) in a large range of configurations. Moreover, the QFI shows
some relevant peaks, determined by the spectral properties of the Hamiltonian,
suggesting that certain values of the magnetic fields may be estimated better
than the others, depending on the value of other tunable parameters. We also
assess the performance of coarse-grained position measurement, showing that it
may be employed to realize nearly optimal estimation strategies.
|
[{'version': 'v1', 'created': 'Thu, 4 Apr 2019 16:37:08 GMT'}]
|
2019-06-25
|
[array(['Razzoli', 'Luca', ''], dtype=object)
array(['Ghirardi', 'Luca', ''], dtype=object)
array(['Siloi', 'Ilaria', ''], dtype=object)
array(['Bordone', 'Paolo', ''], dtype=object)
array(['Paris', 'Matteo G. A.', ''], dtype=object)]
|
17,752 |
2107.07334
|
L\^e Nguy\^en Hoang
|
L\^e-Nguy\^en Hoang, Louis Faucon, Aidan Jungo, Sergei Volodin, Dalia
Papuc, Orfeas Liossatos, Ben Crulis, Mariame Tighanimine, Isabela Constantin,
Anastasiia Kucherenko, Alexandre Maurer, Felix Grimberg, Vlad Nitu, Chris
Vossen, S\'ebastien Rouault and El-Mahdi El-Mhamdi
|
Tournesol: A quest for a large, secure and trustworthy database of
reliable human judgments
|
27 pages, 13 figures
| null | null | null |
cs.HC cs.CR cs.CY cs.LG
|
http://creativecommons.org/licenses/by-sa/4.0/
|
Today's large-scale algorithms have become immensely influential, as they
recommend and moderate the content that billions of humans are exposed to on a
daily basis. They are the de-facto regulators of our societies' information
diet, from shaping opinions on public health to organizing groups for social
movements. This creates serious concerns, but also great opportunities to
promote quality information. Addressing the concerns and seizing the
opportunities is a challenging, enormous and fabulous endeavor, as intuitively
appealing ideas often come with unwanted {\it side effects}, and as it requires
us to think about what we deeply prefer.
Understanding how today's large-scale algorithms are built is critical to
determine what interventions will be most effective. Given that these
algorithms rely heavily on {\it machine learning}, we make the following key
observation: \emph{any algorithm trained on uncontrolled data must not be
trusted}. Indeed, a malicious entity could take control over the data, poison
it with dangerously manipulative fabricated inputs, and thereby make the
trained algorithm extremely unsafe. We thus argue that the first step towards
safe and ethical large-scale algorithms must be the collection of a large,
secure and trustworthy dataset of reliable human judgments.
To achieve this, we introduce \emph{Tournesol}, an open source platform
available at \url{https://tournesol.app}. Tournesol aims to collect a large
database of human judgments on what algorithms ought to widely recommend (and
what they ought to stop widely recommending). We outline the structure of the
Tournesol database, the key features of the Tournesol platform and the main
hurdles that must be overcome to make it a successful project. Most
importantly, we argue that, if successful, Tournesol may then serve as the
essential foundation for any safe and ethical large-scale algorithm.
|
[{'version': 'v1', 'created': 'Sat, 29 May 2021 19:21:35 GMT'}]
|
2021-07-16
|
[array(['Hoang', 'Lê-Nguyên', ''], dtype=object)
array(['Faucon', 'Louis', ''], dtype=object)
array(['Jungo', 'Aidan', ''], dtype=object)
array(['Volodin', 'Sergei', ''], dtype=object)
array(['Papuc', 'Dalia', ''], dtype=object)
array(['Liossatos', 'Orfeas', ''], dtype=object)
array(['Crulis', 'Ben', ''], dtype=object)
array(['Tighanimine', 'Mariame', ''], dtype=object)
array(['Constantin', 'Isabela', ''], dtype=object)
array(['Kucherenko', 'Anastasiia', ''], dtype=object)
array(['Maurer', 'Alexandre', ''], dtype=object)
array(['Grimberg', 'Felix', ''], dtype=object)
array(['Nitu', 'Vlad', ''], dtype=object)
array(['Vossen', 'Chris', ''], dtype=object)
array(['Rouault', 'Sébastien', ''], dtype=object)
array(['El-Mhamdi', 'El-Mahdi', ''], dtype=object)]
|
17,753 |
1306.5435
|
Saul Cohen
|
Tanmoy Bhattacharya, Saul D. Cohen, Rajan Gupta, Anosh Joseph,
Huey-Wen Lin, Boram Yoon
|
Nucleon Charges and Electromagnetic Form Factors from 2+1+1-Flavor
Lattice QCD
|
20 pages, 11 figures, 8 tables; NPR further revised and some
clarifications in response to referee comments
|
Phys. Rev. D 89, 094502 (2014)
|
10.1103/PhysRevD.89.094502
|
LA-UR-13-24606, NT@UW-13-23
|
hep-lat hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present lattice-QCD results on the nucleon isovector axial, scalar and
tensor charges, the isovector electromagnetic Dirac and Pauli form factors, and
the connected parts of the isoscalar charges. The calculations have been done
using two ensembles of HISQ lattices generated by the MILC Collaboration with
2+1+1 dynamical flavors at a lattice spacing of 0.12 fm and with light-quark
masses corresponding to pions with masses 310 and 220 MeV. We perform a
systematic study including excited-state degrees of freedom and examine the
dependence of the extracted nucleon matrix elements on source-sink separation.
This study demonstrates with high-statistics data that including excited-state
contributions and generating data at multiple separations is necessary to
remove contamination that would otherwise lead to systematic error. We also
determine the renormalization constants of the associated quark bilinear
operators in the RI-sMOM scheme and make comparisons of our renormalized
results with previous dynamical-lattice calculations.
|
[{'version': 'v1', 'created': 'Sun, 23 Jun 2013 16:32:19 GMT'}
{'version': 'v2', 'created': 'Tue, 20 Aug 2013 19:07:12 GMT'}
{'version': 'v3', 'created': 'Sun, 11 May 2014 17:51:10 GMT'}]
|
2014-05-14
|
[array(['Bhattacharya', 'Tanmoy', ''], dtype=object)
array(['Cohen', 'Saul D.', ''], dtype=object)
array(['Gupta', 'Rajan', ''], dtype=object)
array(['Joseph', 'Anosh', ''], dtype=object)
array(['Lin', 'Huey-Wen', ''], dtype=object)
array(['Yoon', 'Boram', ''], dtype=object)]
|
17,754 |
1207.5529
|
Nagaitsev, Sergei
|
Sergei Nagaitsev, A. Valishev (Fermilab), V. Danilov (SNS Project, Oak
Ridge)
|
Nonlinear optics as a path to high-intensity circular machines
|
5 pp. 46th ICFA Advanced Beam Dynamics Workshop on High-Intensity and
High-Brightness Hadron Beams HB2010, Sep 27 - Oct 1 2010. Morschach,
Switzerland
| null | null |
FERMILAB-CONF-10-390-AD
|
physics.acc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
What prevents us from building super-high intensity accelerators? The answer
is case-specific, but it often points to one of the following phenomena:
machine resonances, various tune shifts (and spreads), and instabilities. These
three phenomena are interdependent in all present machines. In this paper we
propose a path toward alleviating these phenomena by making accelerators
nonlinear. This idea is not new: Orlov (1963) and McMillan (1967) have proposed
initial ideas on nonlinear focusing systems for accelerators. However,
practical implementations of such ideas proved elusive, until recently.
|
[{'version': 'v1', 'created': 'Mon, 23 Jul 2012 20:35:32 GMT'}]
|
2012-07-25
|
[array(['Nagaitsev', 'Sergei', '', 'Fermilab'], dtype=object)
array(['Valishev', 'A.', '', 'Fermilab'], dtype=object)
array(['Danilov', 'V.', '', 'SNS Project, Oak\n Ridge'], dtype=object)]
|
17,755 |
1907.00040
|
Takao Aoki
|
Donald H. White, Shinya Kato, Nikolett Nemet, Scott Parkins, Takao
Aoki
|
Cavity dark mode of distant coupled atom-cavity systems
| null |
Phys. Rev. Lett. 122, 253603 (2019)
|
10.1103/PhysRevLett.122.253603
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report on a combined experimental and theoretical investigation into the
normal modes of an all-fiber coupled cavity-quantum-electrodynamics system. The
interaction between atomic ensembles and photons in the same cavities, and that
between the photons in these cavities and the photons in the fiber connecting
these cavities, generates five non-degenerate normal modes. We demonstrate our
ability to excite each normal mode individually. We study particularly the
`cavity dark mode', in which the two cavities coupled directly to the atoms do
not exhibit photonic excitation. Through the observation of this mode, we
demonstrate remote excitation and nonlocal saturation of atoms.
|
[{'version': 'v1', 'created': 'Fri, 28 Jun 2019 18:58:50 GMT'}]
|
2019-07-02
|
[array(['White', 'Donald H.', ''], dtype=object)
array(['Kato', 'Shinya', ''], dtype=object)
array(['Nemet', 'Nikolett', ''], dtype=object)
array(['Parkins', 'Scott', ''], dtype=object)
array(['Aoki', 'Takao', ''], dtype=object)]
|
17,756 |
cond-mat/9706049
|
Masao Arai
|
M. Arai (NIRIM) and T. Tsunetsugu (Univ. of Tsukuba)
|
Electronic Structures of Sr_{14-x}Ca_{x}Cu24O41
|
6 pages, 3 ps figures included, RevTex
| null |
10.1103/PhysRevB.56.R4305
| null |
cond-mat.mtrl-sci cond-mat.supr-con
| null |
The electronic structures of Sr_{14-x}Ca_{x}Cu24O41 are calculated within the
local density approximation. Around the Fermi energy there exist
quasi-one-dimensional bands originated from the ladder and chain layers. The
nearest-neighbor inter-ladder hoppings are estimated to be 5--20% of the
intra-ladder ones. Possible effects of Ca substitution on electronic structures
and charge distribution are also discussed.
|
[{'version': 'v1', 'created': 'Fri, 6 Jun 1997 02:27:52 GMT'}]
|
2009-10-30
|
[array(['Arai', 'M.', '', 'NIRIM'], dtype=object)
array(['Tsunetsugu', 'T.', '', 'Univ. of Tsukuba'], dtype=object)]
|
17,757 |
math/0207254
|
Fabrizio M. E. Catanese
|
Fabrizio Catanese (Universit\"at Bayreuth)
|
Symplectic structures of algebraic surfaces and deformation
|
Addendum to the paper : Moduli spaces of surfaces and real structures
| null | null | null |
math.AG math.SG
| null |
Friedman and Morgan made the "speculation" that deformation equivalence and
diffeomorphism should coincide for algebraic surfaces. Counterexamples, for the
hitherto open case of surfaces of general type, have been given in the last
years by Manetti, by Kharlamov-Kulikov and in my cited article. For the latter
much simpler examples, it was shown that there are surfaces $S$ which are not
deformation equivalent to their complex conjugate. However, by Seiberg-Witten
theory, any (oriented) diffeomorphism of minimal surfaces carries the canonical
class K to + K or to - K, and deformation equivalence implies the existence of
a diffeomorphism carrying K to +K. In fact, as observed by a referee, the bulk
of the proof was to show that our surfaces have no selfhomeomorphism carrying K
to - K (the same for the K-K surfaces). In this note we show that Manetti's
surfaces provide indeed a counterexample to the reinforced conjecture, since
they are symplectomorphic. Our result is that a surface of general type has a
canonical symplectic structure (up to symplectomorphism) which is invariant for
deformation and for certain degenerations to normal surfaces. Since moreover no
simply connected counterexamples to the conjecture are known, we provide
explicit families of 1-connected surfaces, which are obtained by glueing
together two fixed manifolds with boundary, are not deformation equivalent, but
are homeomorphic under a homeomorphism carrying K to +K. We also give as
application the existence of symplectically equivalent, but not deformation
equivalent cuspidal plane curves.
|
[{'version': 'v1', 'created': 'Fri, 26 Jul 2002 16:04:46 GMT'}]
|
2007-05-23
|
[array(['Catanese', 'Fabrizio', '', 'Universität Bayreuth'], dtype=object)]
|
17,758 |
math/0505251
|
Tirthankar Bhattacharyya
|
Tirthankar Bhattacharyya, Gadadhar Misra
|
Contractive and completely contractive maps over planar algebras
|
15 pages
| null | null | null |
math.FA math.OA
| null |
We consider contractive homomorphisms of a planar algebra ${\mathcal
A}(\Omega)$ over a finitely connected bounded domain $\Omega \subseteq \C$ and
ask if they are necessarily completely contractive. We show that a homomorphism
$\rho:{\mathcal A}(\Omega) \to {\mathcal B}(\mathcal H)$ for which
$\dim({\mathcal A}(\Omega)/\ker \rho) = 2$ is the direct integral of
homomorphisms $\rho_T$ induced by operators on two dimensional Hilbert spaces
via a suitable functional calculus $\rho_T: f \mapsto f(T), f\in {\mathcal
A}(\Omega)$. It is well-known that contractive homomorphisms $\rho_T$, induced
by a linear transformation $T:\C^2 \to \C^2$ are necessarily completely
contractive. Consequently, using Arveson's dilation theorem for completely
contractive homomorphisms, one concludes that such a homomorphism $\rho_T$
possesses a dilation. In this paper, we construct this dilation explicitly. In
view of recent examples discovered by Dritschel and McCullough, we know that
not all contractive homomorphisms $\rho_T$ are completely contractive even if
$T$ is a linear transformation on a finite-dimensional Hilbert space. We show
that one may be able to produce an example of a contractive homomorphism
$\rho_T$ of ${\mathcal A}(\Omega)$ which is not completely contractive if an
operator space which is naturally associated with the problem is not the MAX
space. Finally, within a certain special class of contractive homomorphisms
$\rho_T$ of the planar algebra ${\mathcal A}(\Omega)$, we construct a dilation.
|
[{'version': 'v1', 'created': 'Thu, 12 May 2005 11:04:21 GMT'}
{'version': 'v2', 'created': 'Fri, 22 Jul 2005 08:57:59 GMT'}]
|
2007-05-23
|
[array(['Bhattacharyya', 'Tirthankar', ''], dtype=object)
array(['Misra', 'Gadadhar', ''], dtype=object)]
|
17,759 |
0902.3469
|
Hui Li
|
H. Li (LANL), J. Arons (UCB), P. Bellan (Caltech), S. Colgate (LANL),
C. Forest (UW-Madison), K. Fowler (UCB), J. Goodman (Princeton), T. Intrator
(LANL), P. Kronberg (LANL), M. Lyutikov (Purdue), E. Zweibel (UW-Madison)
|
The Need for Plasma Astrophysics in Understanding Life Cycles of Active
Galaxies
|
a White Paper submitted to GCT and FCP panels of Astro2010
| null | null | null |
astro-ph.HE astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this White Paper, we emphasize the need for and the important role of
plasma astrophysics in the studies of formation, evolution of, and feedback by
Active Galaxies. We make three specific recommendations: 1) We need to
significantly increase the resolution of VLA, perhaps by building an EVLA-II at
a modest cost. This will provide the angular resolution to study jets at kpc
scales, where, for example, detailed Faraday rotation diagnosis can be done at
1GHz transverse to jets; 2) We need to build coordinated programs among NSF,
NASA, and DOE to support laboratory plasma experiments (including liquid metal)
that are designed to study key astrophysical processes, such as
magneto-rotational instability (origin of angular momentum transport), dynamo
(origin of magnetic fields), jet launching and stability. Experiments allowing
access to relativistic plasma regime (perhaps by intense lasers and magnetic
fields) will be very helpful for understanding the stability and dissipation
physics of jets from Supermassive Black Holes; 3) Again through the coordinated
support among the three Agencies, we need to invest in developing comprehensive
theory and advanced simulation tools to study the accretion disks and jets in
relativistic plasma physics regime, especially in connecting large scale fluid
scale phenomena with relativistic kinetic dissipation physics through which
multi-wavelength radiation is produced.
|
[{'version': 'v1', 'created': 'Thu, 19 Feb 2009 21:46:00 GMT'}]
|
2009-02-23
|
[array(['Li', 'H.', '', 'LANL'], dtype=object)
array(['Arons', 'J.', '', 'UCB'], dtype=object)
array(['Bellan', 'P.', '', 'Caltech'], dtype=object)
array(['Colgate', 'S.', '', 'LANL'], dtype=object)
array(['Forest', 'C.', '', 'UW-Madison'], dtype=object)
array(['Fowler', 'K.', '', 'UCB'], dtype=object)
array(['Goodman', 'J.', '', 'Princeton'], dtype=object)
array(['Intrator', 'T.', '', 'LANL'], dtype=object)
array(['Kronberg', 'P.', '', 'LANL'], dtype=object)
array(['Lyutikov', 'M.', '', 'Purdue'], dtype=object)
array(['Zweibel', 'E.', '', 'UW-Madison'], dtype=object)]
|
17,760 |
1304.3135
|
Jinzhong Niu
|
Jinzhong Niu and Simon Parsons
|
Maximizing Matching in Double-sided Auctions
|
16 pages, 4 figures, full-length version of an extended abstract
published at the AAMAS 2013 conference
| null | null | null |
cs.GT q-fin.TR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we introduce a novel, non-recursive, maximal matching
algorithm for double auctions, which aims to maximize the amount of commodities
to be traded. It differs from the usual equilibrium matching, which clears a
market at the equilibrium price. We compare the two algorithms through
experimental analyses, showing that the maximal matching algorithm is favored
in scenarios where trading volume is a priority and that it may possibly
improve allocative efficiency over equilibrium matching as well. A
parameterized algorithm that incorporates both maximal matching and equilibrium
matching as special cases is also presented to allow flexible control on how
much to trade in a double auction.
|
[{'version': 'v1', 'created': 'Mon, 11 Feb 2013 18:18:47 GMT'}]
|
2013-04-12
|
[array(['Niu', 'Jinzhong', ''], dtype=object)
array(['Parsons', 'Simon', ''], dtype=object)]
|
17,761 |
1807.10657
|
Takao Yamanaka
|
Taiki Oyama and Takao Yamanaka
|
Influence of Image Classification Accuracy on Saliency Map Estimation
|
CAAI Transactions on Intelligence Technology, accepted in 2018
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Saliency map estimation in computer vision aims to estimate the locations
where people gaze in images. Since people tend to look at objects in images,
the parameters of the model pretrained on ImageNet for image classification are
useful for the saliency map estimation. However, there is no research on the
relationship between the image classification accuracy and the performance of
the saliency map estimation. In this paper, it is shown that there is a strong
correlation between image classification accuracy and saliency map estimation
accuracy. We also investigated the effective architecture based on multi scale
images and the upsampling layers to refine the saliency-map resolution. Our
model achieved the state-of-the-art accuracy on the PASCAL-S, OSIE, and MIT1003
datasets. In the MIT Saliency Benchmark, our model achieved the best
performance in some metrics and competitive results in the other metrics.
|
[{'version': 'v1', 'created': 'Fri, 27 Jul 2018 14:36:58 GMT'}]
|
2018-07-30
|
[array(['Oyama', 'Taiki', ''], dtype=object)
array(['Yamanaka', 'Takao', ''], dtype=object)]
|
17,762 |
1302.1269
|
Hajer Bahouri
|
Hajer Bahouri, Slim Ibrahim and Galina Perelman
|
Scattering for the critical 2-D NLS with exponential growth
| null | null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article, we establish in the radial framework the $H^1$-scattering
for the critical 2-D nonlinear Schr\"odinger equation with exponential growth.
Our strategy relies on both the a priori estimate derived in \cite{CGT, PV} and
the characterization of the lack of compactness of the Sobolev embedding of
$H_{rad}^1(\R^2)$ into the critical Orlicz space ${\cL}(\R^2)$ settled in
\cite{BMM}. The radial setting, and particularly the fact that we deal with
bounded functions far away from the origin, occurs in a crucial way in our
approach.
|
[{'version': 'v1', 'created': 'Wed, 6 Feb 2013 05:49:43 GMT'}]
|
2013-02-07
|
[array(['Bahouri', 'Hajer', ''], dtype=object)
array(['Ibrahim', 'Slim', ''], dtype=object)
array(['Perelman', 'Galina', ''], dtype=object)]
|
17,763 |
2203.14520
|
Qing-Xin Meng
|
Qing-xin Meng, Jian-wei Liu
|
Optimistic Online Convex Optimization in Dynamic Environments
|
An early version of this manuscript can be found at
https://openreview.net/forum?id=T3_cV3-zbg
| null | null | null |
cs.LG math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we study the optimistic online convex optimization problem in
dynamic environments. Existing works have shown that Ader enjoys an
$O\left(\sqrt{\left(1+P_T\right)T}\right)$ dynamic regret upper bound, where
$T$ is the number of rounds, and $P_T$ is the path length of the reference
strategy sequence. However, Ader is not environment-adaptive. Based on the fact
that optimism provides a framework for implementing environment-adaptive, we
replace Greedy Projection (GP) and Normalized Exponentiated Subgradient (NES)
in Ader with Optimistic-GP and Optimistic-NES respectively, and name the
corresponding algorithm ONES-OGP. We also extend the doubling trick to the
adaptive trick, and introduce three characteristic terms naturally arise from
optimism, namely $M_T$, $\widetilde{M}_T$ and $V_T+1_{L^2\rho\left(\rho+2
P_T\right)\leqslant\varrho^2 V_T}D_T$, to replace the dependence of the dynamic
regret upper bound on $T$. We elaborate ONES-OGP with adaptive trick and its
subgradient variation version, all of which are environment-adaptive.
|
[{'version': 'v1', 'created': 'Mon, 28 Mar 2022 06:22:05 GMT'}]
|
2022-03-29
|
[array(['Meng', 'Qing-xin', ''], dtype=object)
array(['Liu', 'Jian-wei', ''], dtype=object)]
|
17,764 |
1908.01042
|
Alexander Plakhov
|
Alexander Plakhov
|
A note on Newton's problem of minimal resistance for convex bodies
|
Comments are welcome!
| null | null | null |
math.OC math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the following problem: minimize the functional $\int_\Omega
f(\nabla u(x))\, dx$ in the class of concave functions $u: \Omega \to [0,M]$,
where $\Omega \subset \mathbb{R}^2$ is a convex body and $M > 0$. If $f(x) =
1/(1 + |x|^2)$ and $\Omega$ is a circle, the problem is called Newton's problem
of least resistance. It is known that the problem admits at least one solution.
We prove that if all points of $\partial\Omega$ are regular and
${|x|f(x)}/(|y|f(y)) \to +\infty$ as $|x|/|y| \to 0$ then a solution $u$ to the
problem satisfies $u\rfloor_{\partial\Omega} = 0$. This result proves the
conjecture stated in 1993 for Newton's problem.
|
[{'version': 'v1', 'created': 'Fri, 2 Aug 2019 20:25:10 GMT'}
{'version': 'v2', 'created': 'Wed, 2 Oct 2019 14:59:28 GMT'}]
|
2019-10-03
|
[array(['Plakhov', 'Alexander', ''], dtype=object)]
|
17,765 |
0811.4060
|
Ploszajczak
|
J. Okolowicz, M. Ploszajczak
|
Features of exceptional points and the continuum spectroscopy
|
10 pages, 4 figures Zakopane Conference on Nuclear Physics, September
1-7, 2008, Zakopane, Poland
|
Acta Phys.Polon.B40:409-418,2009
| null | null |
nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss observable features of exceptional points and the resonance
spectroscopy of $^{16}$Ne using the Shell Model Embedded in the Continuum.
|
[{'version': 'v1', 'created': 'Tue, 25 Nov 2008 11:34:10 GMT'}]
|
2009-04-24
|
[array(['Okolowicz', 'J.', ''], dtype=object)
array(['Ploszajczak', 'M.', ''], dtype=object)]
|
17,766 |
hep-ph/0205098
|
Massimo Mannarelli
|
M.Mannarelli
|
Effective description of the LOFF phase of QCD
|
Talk at the Giselda Meeting, Frascti (Roma), 14-18 Jen 2001. Latex
file, 7 pages, 1 figure
| null |
10.1142/9789812776532_0027
| null |
hep-ph
| null |
We present an effective field theory for the crystalline color
superconductivity phase of QCD. It is kown that at high density and at low
temperature QCD exhibits a transition to a color superconducting phase
characterized by energy gaps in the fermion spectra. Under specific
circumstances the gap parameter has a crystalline pattern, breaking
translational and rotational invariance. The corresponding phase is the
crystalline color superconductive phase (or {\it LOFF} phase). We compute the
parameters of the low energy effective lagrangian describing the motion of the
free phonon in the high density medium and derive the phonon dispersion law.
|
[{'version': 'v1', 'created': 'Fri, 10 May 2002 09:11:25 GMT'}]
|
2017-08-23
|
[array(['Mannarelli', 'M.', ''], dtype=object)]
|
17,767 |
1503.05751
|
Urban Larsson Mr
|
Urban Larsson
|
An Aperiodic Subtraction Game of Nim-dimension Two
|
2 pages
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In a recent arXiv-manuscript Fox studies infinite subtraction games with a
finite (ternary) and aperiodic Sprague-Grundy function. Here we provide an
elementary example of a game with the given properties, namely the game given
by the subtraction set $\{F_{2n+1}-1\}$, where $F_i$ is the $i$th Fibonacci
number, and where $n$ ranges over the positive integers. Our definition of
nim-dimension reflects the precise number of power-of-two-components generated
by the games; the group of nim-values is of order four so the dimension is two
(in the classical definition this dimension would have been one). Thanks to
Carlos Santos for an enlightening discussion on this matter.
|
[{'version': 'v1', 'created': 'Thu, 19 Mar 2015 12:59:58 GMT'}
{'version': 'v2', 'created': 'Wed, 25 Mar 2015 19:47:16 GMT'}]
|
2015-03-26
|
[array(['Larsson', 'Urban', ''], dtype=object)]
|
17,768 |
hep-ph/0101242
|
S. Kalyana Rama
|
S. Kalyana Rama
|
Some Phenomenological Aspects of the (n + m + 1) dimensional Brane World
Scenario with an m-form Field
|
15 pages. Latex. References added. Many minor changes. Correct
analysis of Kaluza-Klein excitations along compact brane directions shows
that the hierarchy problem is very likely reintroduced. To appear in Physics
Letters B
|
Phys.Lett. B507 (2001) 287-295
|
10.1016/S0370-2693(01)00439-7
|
IMSc/2001/01/06
|
hep-ph hep-th
| null |
In the D = (n + m + 1) dimensional brane world scenario with m compact
dimensions, the radion modulus can be stabilised by a massive bulk m-form
antisymmetric field. We analyse some of the phenomenological aspects of this
scenario. We find that the radion mass is smaller than the TeV scale, but
larger than that in the case where the radion modulus is stabilised by a bulk
scalar field. From the macroscopic n dimensional spacetime point of view, the
m-form field mimics a set of p-form fields. We analyse the mass spectrum of
these fields. The lowest mass is \stackrel{>}{_\sim} TeV whereas, for any bulk
or brane field, the excitations in the compact space have Planckian mass and
are likely to reintroduce the hierarchy problem. Also, we analyse the couplings
of the m-form field to the matter fields living on a brane. The present results
are applicable to more general cases also.
|
[{'version': 'v1', 'created': 'Mon, 22 Jan 2001 12:23:40 GMT'}
{'version': 'v2', 'created': 'Thu, 29 Mar 2001 06:50:43 GMT'}]
|
2009-11-07
|
[array(['Rama', 'S. Kalyana', ''], dtype=object)]
|
17,769 |
1703.10536
|
Tobias Heindel
|
Alexander Schlehahn, Sarah Fischbach, Ronny Schmidt, Arsenty
Kaganskiy, Andr\'e Strittmatter, Sven Rodt, Tobias Heindel, Stephan
Reitzenstein
|
A stand-alone fiber-coupled single-photon source
|
8 pages, 4 figures, contains new experimental data
|
Scientific Reports 8, 1340 (2018)
|
10.1038/s41598-017-19049-4
| null |
cond-mat.mes-hall physics.ins-det quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we present a stand-alone and fiber-coupled quantum-light
source. The plug-and-play device is based on an optically driven quantum dot
delivering single photons via an optical fiber. The quantum dot is
deterministically integrated in a monolithic microlens which is precisely
coupled to the core of an optical fiber via active optical alignment and
epoxide adhesive bonding. The rigidly coupled fiber-emitter assembly is
integrated in a compact Stirling cryocooler with a base temperature of 35 K. We
benchmark our practical quantum device via photon auto-correlation measurements
revealing $g^{(2)}(0)=0.07 \pm 0.05$ under continuous-wave excitation and we
demonstrate triggered non-classical light at a repetition rate of 80 MHz. The
long-term stability of our quantum light source is evaluated by endurance tests
showing that the fiber-coupled quantum dot emission is stable within 4% over
several successive cool-down/warm-up cycles. Additionally, we demonstrate
non-classical photon emission for a user-intervention-free 100-hour test run
and stable single-photon count rates up to 11.7 kHz with a standard deviation
of 4%.
|
[{'version': 'v1', 'created': 'Thu, 30 Mar 2017 15:43:13 GMT'}
{'version': 'v2', 'created': 'Fri, 1 Dec 2017 14:11:49 GMT'}]
|
2018-01-23
|
[array(['Schlehahn', 'Alexander', ''], dtype=object)
array(['Fischbach', 'Sarah', ''], dtype=object)
array(['Schmidt', 'Ronny', ''], dtype=object)
array(['Kaganskiy', 'Arsenty', ''], dtype=object)
array(['Strittmatter', 'André', ''], dtype=object)
array(['Rodt', 'Sven', ''], dtype=object)
array(['Heindel', 'Tobias', ''], dtype=object)
array(['Reitzenstein', 'Stephan', ''], dtype=object)]
|
17,770 |
2207.08278
|
Alexander Kasprzyk
|
Gavin Brown, Jaros{\l}aw Buczy\'nski and Alexander Kasprzyk
|
Toric Sarkisov links of toric Fano varieties
| null | null | null | null |
math.AG
|
http://creativecommons.org/licenses/by/4.0/
|
We explain a web of Sarkisov links that overlies the classification of Fano
weighted projective spaces in dimensions 3 and 4, extending results of
Prokhorov.
|
[{'version': 'v1', 'created': 'Sun, 17 Jul 2022 20:12:50 GMT'}]
|
2022-07-19
|
[array(['Brown', 'Gavin', ''], dtype=object)
array(['Buczyński', 'Jarosław', ''], dtype=object)
array(['Kasprzyk', 'Alexander', ''], dtype=object)]
|
17,771 |
1809.00087
|
Andrei Druzhinin
|
A. Druzhinin
|
The homomorphism of presheaves ${\mathrm{K}}^\mathrm{MW}_*\to
{\pi}^{*,*}_s$ over a base
|
We add a proof of the isomorphism over a field
|
Ann. K-Th. 6 (2021) 651-671
|
10.2140/akt.2021.6.651
| null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We construct the homomorphism of presheaves ${\mathrm{K}}^\mathrm{MW}_* \to
{\pi}^{*,*}$ over an arbitrary base scheme $S$, where $\mathrm{K}^\mathrm{MW}$
is the (naive) Milnor-Witt K-theory presheave.
Also we discuss some partly alternative proof (or proofs) of the isomorphism
of sheaves $\unKMW_n\simeq \underline{\pi}^{n,n}_s$, $n\in \mathbb Z$, over a
filed $k$ originally proved in \cite{M02} and \cite{M-A1Top}.
|
[{'version': 'v1', 'created': 'Fri, 31 Aug 2018 23:53:07 GMT'}
{'version': 'v2', 'created': 'Tue, 11 Sep 2018 06:32:33 GMT'}
{'version': 'v3', 'created': 'Mon, 8 Oct 2018 13:22:06 GMT'}
{'version': 'v4', 'created': 'Sun, 14 Oct 2018 15:56:29 GMT'}
{'version': 'v5', 'created': 'Wed, 12 Dec 2018 18:56:03 GMT'}
{'version': 'v6', 'created': 'Thu, 13 Dec 2018 14:53:59 GMT'}]
|
2022-03-09
|
[array(['Druzhinin', 'A.', ''], dtype=object)]
|
17,772 |
1612.06812
|
Johannes Borregaard phd
|
Johannes Borregaard and Anders S. S{\o}rensen and Ignacio Cirac and
Mikhail D. Lukin
|
Efficient quantum computation in a network with probabilistic gates and
logical encoding
|
5 pages, 4 figures
|
Phys. Rev. A 95, 042312 (2017)
|
10.1103/PhysRevA.95.042312
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A new approach to efficient quantum computation with probabilistic gates is
proposed and analyzed in both a local and non-local setting. It combines
heralded gates previously studied for atom or atom-like qubits with logical
encoding from linear optical quantum computation in order to perform high
fidelity quantum gates across a quantum network. The error-detecting properties
of the heralded operations ensure high fidelity while the encoding makes it
possible to correct for failed attempts such that deterministic and
high-quality gates can be achieved. Importantly, this is robust to photon loss,
which is typically the main obstacle to photonic based quantum information
processing. Overall this approach opens a novel path towards quantum networks
with atomic nodes and photonic links.
|
[{'version': 'v1', 'created': 'Tue, 20 Dec 2016 19:05:17 GMT'}]
|
2017-04-19
|
[array(['Borregaard', 'Johannes', ''], dtype=object)
array(['Sørensen', 'Anders S.', ''], dtype=object)
array(['Cirac', 'Ignacio', ''], dtype=object)
array(['Lukin', 'Mikhail D.', ''], dtype=object)]
|
17,773 |
1905.03397
|
Pirazh Khorramshahi
|
Pirazh Khorramshahi, Amit Kumar, Neehar Peri, Sai Saketh Rambhatla,
Jun-Cheng Chen and Rama Chellappa
|
A Dual-Path Model With Adaptive Attention For Vehicle Re-Identification
|
This work has been accepted for oral presentation in ICCV 2019
| null | null | null |
cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
In recent years, attention models have been extensively used for person and
vehicle re-identification. Most re-identification methods are designed to focus
attention on key-point locations. However, depending on the orientation, the
contribution of each key-point varies. In this paper, we present a novel
dual-path adaptive attention model for vehicle re-identification (AAVER). The
global appearance path captures macroscopic vehicle features while the
orientation conditioned part appearance path learns to capture localized
discriminative features by focusing attention on the most informative
key-points. Through extensive experimentation, we show that the proposed AAVER
method is able to accurately re-identify vehicles in unconstrained scenarios,
yielding state of the art results on the challenging dataset VeRi-776. As a
byproduct, the proposed system is also able to accurately predict vehicle
key-points and shows an improvement of more than 7% over state of the art. The
code for key-point estimation model is available at
https://github.com/Pirazh/Vehicle_Key_Point_Orientation_Estimation.
|
[{'version': 'v1', 'created': 'Thu, 9 May 2019 00:52:19 GMT'}
{'version': 'v2', 'created': 'Thu, 15 Aug 2019 22:30:12 GMT'}
{'version': 'v3', 'created': 'Tue, 24 Sep 2019 16:16:35 GMT'}]
|
2019-09-25
|
[array(['Khorramshahi', 'Pirazh', ''], dtype=object)
array(['Kumar', 'Amit', ''], dtype=object)
array(['Peri', 'Neehar', ''], dtype=object)
array(['Rambhatla', 'Sai Saketh', ''], dtype=object)
array(['Chen', 'Jun-Cheng', ''], dtype=object)
array(['Chellappa', 'Rama', ''], dtype=object)]
|
17,774 |
2007.00135
|
Bastien Pasdeloup
|
Yassine El Ouahidi, Matis Feller, Matthieu Talagas, Bastien Pasdeloup
|
An Approach for Clustering Subjects According to Similarities in Cell
Distributions within Biopsies
| null | null | null | null |
q-bio.QM cs.LG q-bio.TO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we introduce a novel and interpretable methodology to cluster
subjects suffering from cancer, based on features extracted from their
biopsies. Contrary to existing approaches, we propose here to capture complex
patterns in the repartitions of their cells using histograms, and compare
subjects on the basis of these repartitions. We describe here our complete
workflow, including creation of the database, cells segmentation and
phenotyping, computation of complex features, choice of a distance function
between features, clustering between subjects using that distance, and survival
analysis of obtained clusters. We illustrate our approach on a database of
hematoxylin and eosin (H&E)-stained tissues of subjects suffering from Stage I
lung adenocarcinoma, where our results match existing knowledge in prognosis
estimation with high confidence.
|
[{'version': 'v1', 'created': 'Tue, 30 Jun 2020 22:30:58 GMT'}
{'version': 'v2', 'created': 'Mon, 6 Jul 2020 13:34:15 GMT'}]
|
2020-07-07
|
[array(['Ouahidi', 'Yassine El', ''], dtype=object)
array(['Feller', 'Matis', ''], dtype=object)
array(['Talagas', 'Matthieu', ''], dtype=object)
array(['Pasdeloup', 'Bastien', ''], dtype=object)]
|
17,775 |
2109.00534
|
Blake Woodworth
|
Blake Woodworth
|
The Minimax Complexity of Distributed Optimization
| null | null | null | null |
math.OC cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this thesis, I study the minimax oracle complexity of distributed
stochastic optimization. First, I present the "graph oracle model", an
extension of the classic oracle complexity framework that can be applied to
study distributed optimization algorithms. Next, I describe a general approach
to proving optimization lower bounds for arbitrary randomized algorithms (as
opposed to more restricted classes of algorithms, e.g., deterministic or
"zero-respecting" algorithms), which is used extensively throughout the thesis.
For the remainder of the thesis, I focus on the specific case of the
"intermittent communication setting", where multiple computing devices work in
parallel with limited communication amongst themselves. In this setting, I
analyze the theoretical properties of the popular Local Stochastic Gradient
Descent (SGD) algorithm in convex setting, both for homogeneous and
heterogeneous objectives. I provide the first guarantees for Local SGD that
improve over simple baseline methods, but show that Local SGD is not optimal in
general. In pursuit of optimal methods in the intermittent communication
setting, I then show matching upper and lower bounds for the intermittent
communication setting with homogeneous convex, heterogeneous convex, and
homogeneous non-convex objectives. These upper bounds are attained by simple
variants of SGD which are therefore optimal. Finally, I discuss several
additional assumptions about the objective or more powerful oracles that might
be exploitable in order to develop better intermittent communication algorithms
with better guarantees than our lower bounds allow.
|
[{'version': 'v1', 'created': 'Wed, 1 Sep 2021 15:18:33 GMT'}]
|
2021-09-03
|
[array(['Woodworth', 'Blake', ''], dtype=object)]
|
17,776 |
1310.2562
|
Philippe Brax
|
Philippe Brax
|
An Environmental Variation of Constants
|
14 pages, 7 figures, published version
|
Phys. Rev. D 90, 023505 (2014)
|
10.1103/PhysRevD.90.023505
| null |
astro-ph.CO hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Models of modified gravity, whereby local tests of gravity are evaded thanks
to a screening mechanism of the chameleon or Damour-Polyakov types, lead to a
spatial variation of the particle masses and the fine structure constant. This
is triggered by the environmental dependence of the value of the scalar field
whose presence modifies gravity. In dense media, the field settles at a density
dependent value while in sparse environments it takes the background
cosmological value. We estimate that the maximal deviation of constants from
their present values is constrained by local tests of gravity, and must be less
than $10^{-6}$.
|
[{'version': 'v1', 'created': 'Wed, 9 Oct 2013 18:09:45 GMT'}
{'version': 'v2', 'created': 'Tue, 24 Jun 2014 10:03:42 GMT'}]
|
2014-07-09
|
[array(['Brax', 'Philippe', ''], dtype=object)]
|
17,777 |
1708.04139
|
Zhenyi He
|
Zhenyi He, Fengyuan Zhu and Ken Perlin
|
PhyShare: Sharing Physical Interaction in Virtual Reality
|
7 pages. arXiv admin note: text overlap with arXiv:1701.08879
| null | null | null |
cs.HC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present PhyShare, a new haptic user interface based on actuated robots.
Virtual reality has recently been gaining wide adoption, and an effective
haptic feedback in these scenarios can strongly support user's sensory in
bridging virtual and physical world. Since participants do not directly observe
these robotic proxies, we investigate the multiple mappings between physical
robots and virtual proxies that can utilize the resources needed to provide a
well rounded VR experience. PhyShare bots can act either as directly touchable
objects or invisible carriers of physical objects, depending on different
scenarios. They also support distributed collaboration, allowing remotely
located VR collaborators to share the same physical feedback.
|
[{'version': 'v1', 'created': 'Thu, 10 Aug 2017 21:03:21 GMT'}]
|
2017-08-15
|
[array(['He', 'Zhenyi', ''], dtype=object)
array(['Zhu', 'Fengyuan', ''], dtype=object)
array(['Perlin', 'Ken', ''], dtype=object)]
|
17,778 |
1409.5115
|
Hagar Veksler
|
Hagar Veksler and Shmuel Fishman
|
Semiclassical analysis of Bose-Hubbard dynamics
|
31 pages, 5 figures
| null |
10.1088/1367-2630/17/5/053030
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work the two site Bose-Hubbard model is studied analytically in the
limit of weak coupling u and large number of particles N . The semiclassical
approximation where \frac{1}{N} plays the role of Planck's constant was used
and perturbation theory to order u^{2} was applied. In particular, the
difference in the occupation between the two sites, where initially all
particles are at one site was calculated analytically. Excellent agreement with
the exact numerical solution was found. This quantity exhibits collapses and
revivals that superimpose rapid oscillations. The occupation difference was
calculated also for the case where initially both sites are occupied provided
that the difference in occupation is sufficiently large. It provides an
analytical description of results that were so far found only numerically.
Similar behavior and analysis are expected for a large variety of physical
situations in optics, atom optics and quantum dynamics of electrons in Rydberg
atoms.
|
[{'version': 'v1', 'created': 'Wed, 17 Sep 2014 19:59:07 GMT'}]
|
2015-06-11
|
[array(['Veksler', 'Hagar', ''], dtype=object)
array(['Fishman', 'Shmuel', ''], dtype=object)]
|
17,779 |
quant-ph/0406180
|
Julia Kempe
|
Julia Kempe, Alexei Kitaev and Oded Regev
|
The Complexity of the Local Hamiltonian Problem
|
30 pages, 3 figures, replaced with revised version, numerous
improvements to readability and expanded adiabatic section
|
SIAM Journal of Computing, Vol. 35(5), p. 1070-1097 (2006),
conference version in Proc. 24th FSTTCS, p. 372-383 (2004)
| null | null |
quant-ph cs.CC
| null |
The k-local Hamiltonian problem is a natural complete problem for the
complexity class QMA, the quantum analog of NP. It is similar in spirit to
MAX-k-SAT, which is NP-complete for k<=2. It was known that the problem is
QMA-complete for any k <= 3. On the other hand 1-local Hamiltonian is in P, and
hence not believed to be QMA-complete. The complexity of the 2-local
Hamiltonian problem has long been outstanding. Here we settle the question and
show that it is QMA-complete. We provide two independent proofs; our first
proof uses only elementary linear algebra. Our second proof uses a powerful
technique for analyzing the sum of two Hamiltonians; this technique is based on
perturbation theory and we believe that it might prove useful elsewhere. Using
our techniques we also show that adiabatic computation with two-local
interactions on qubits is equivalent to standard quantum computation.
|
[{'version': 'v1', 'created': 'Thu, 24 Jun 2004 19:23:16 GMT'}
{'version': 'v2', 'created': 'Sun, 2 Oct 2005 13:16:06 GMT'}]
|
2007-05-23
|
[array(['Kempe', 'Julia', ''], dtype=object)
array(['Kitaev', 'Alexei', ''], dtype=object)
array(['Regev', 'Oded', ''], dtype=object)]
|
17,780 |
0911.5582
|
Martin Zehetmayer
|
M. Zehetmayer, M. Eisterer, H. W. Weber, J. Jiang, J. D. Weiss, A.
Yamamoto, A. A. Polyanskii, E. E. Hellstrom, D. C. Larbalestier
|
Disorder Induced Effects on the Critical Current Density of Iron
Pnictide BaFe_1.8 Co_0.2 As_2 single crystals
|
accepted for PhC
| null |
10.1016/j.physc.2009.11.154
| null |
cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Investigating the role of disorder in superconductors is an essential part of
characterizing the fundamental superconducting properties as well as assessing
potential applications of the material. In most cases, the information
available on the defect matrix is poor, making such studies difficult, but the
situation can be improved by introducing defects in a controlled way, as
provided by neutron irradiation. In this work, we analyze the effects of
neutron irradiation on a Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$ single crystal. We
mainly concentrate on the magnetic properties which were determined by
magnetometry. Introducing disorder by neutron irradiation leads to significant
effects on both the reversible and the irreversible magnetic properties, such
as the transition temperature, the upper critical field, the anisotropy, and
the critical current density. The results are discussed in detail by comparing
them with the properties in the unirradiated state.
|
[{'version': 'v1', 'created': 'Mon, 30 Nov 2009 09:08:58 GMT'}]
|
2015-05-14
|
[array(['Zehetmayer', 'M.', ''], dtype=object)
array(['Eisterer', 'M.', ''], dtype=object)
array(['Weber', 'H. W.', ''], dtype=object)
array(['Jiang', 'J.', ''], dtype=object)
array(['Weiss', 'J. D.', ''], dtype=object)
array(['Yamamoto', 'A.', ''], dtype=object)
array(['Polyanskii', 'A. A.', ''], dtype=object)
array(['Hellstrom', 'E. E.', ''], dtype=object)
array(['Larbalestier', 'D. C.', ''], dtype=object)]
|
17,781 |
cond-mat/9902068
|
Susanna Manrubia
|
Susanna C. Manrubia and Damian H. Zanette
|
Stochastic multiplicative processes with reset events
|
8 pages, 3 figures. To appear in Phys. Rev. E
|
Phys. Rev. E, 59 (1999) 4945
|
10.1103/PhysRevE.59.4945
| null |
cond-mat
| null |
We study a stochastic multiplicative process with reset events. It is shown
that the model develops a stationary power-law probability distribution for the
relevant variable, whose exponent depends on the model parameters. Two
qualitatively different regimes are observed, corresponding to intermittent and
regular behaviour. In the boundary between them, the mean value of the relevant
variable is time-independent, and the exponent of the stationary distribution
equals -2. The addition of diffusion to the system modifies in a non-trivial
way the profile of the stationary distribution. Numerical and analytical
results are presented.
|
[{'version': 'v1', 'created': 'Thu, 4 Feb 1999 17:23:36 GMT'}]
|
2009-10-31
|
[array(['Manrubia', 'Susanna C.', ''], dtype=object)
array(['Zanette', 'Damian H.', ''], dtype=object)]
|
17,782 |
2108.07162
|
Giovanni Modanese
|
F. Minotti, G. Modanese
|
Quantum uncertainty and energy flux in extended electrodynamics
|
27 pages
|
Quantum Rep. 2021, 3(4), 703-723
|
10.3390/quantum3040044
| null |
physics.gen-ph
|
http://creativecommons.org/licenses/by/4.0/
|
In quantum theory, for a system with macroscopic wavefunction, the charge
density and current density are represented by non-commuting operators. It
follows that the anomaly $I=\partial_t \rho + \nabla \cdot \mathbf{j}$, being
essentially a linear combination of these two operators in the
frequency-momentum domain, does not admit eigenstates and has a minimum
uncertainty fixed by the Heisenberg relation $\Delta N \Delta \phi \simeq 1$
which involves the occupation number and the phase of the wavefunction. We give
an estimate of the minimum uncertainty in the case of a tunnel Josephson
junction made of Nb. Due to this violation of the local conservation of charge,
for the evaluation of the e.m. field generated by the system it is necessary to
use the extended Aharonov-Bohm electrodynamics. After recalling its field
equations, we compute in general form the energy-momentum tensor and the
radiation power flux generated by a localized oscillating source. The physical
requirements that the total flux be positive, negative or zero yield some
conditions on the dipole moment of the anomaly $I$.
|
[{'version': 'v1', 'created': 'Fri, 16 Jul 2021 16:11:35 GMT'}]
|
2021-11-16
|
[array(['Minotti', 'F.', ''], dtype=object)
array(['Modanese', 'G.', ''], dtype=object)]
|
17,783 |
1210.3919
|
Oleg Derzhko
|
Oleg Derzhko, Jozef Strecka, Lucia Galisova
|
On the compressibility of deformable spin chains in a vicinity of
quantum critical points
|
10 pages, 7 figures
|
The European Physical Journal B Vol. 86, No. 3 (March 2013)
Article Number 88
|
10.1140/epjb/e2013-30979-4
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We calculate the ground-state compressibility of a deformable spin-1/2
Heisenberg-Ising chain with Dzyaloshinskii-Moriya interaction to discuss how a
quantum critical point inherent in this spin system may manifest itself in the
elastic properties of the underlying lattice. We compare these results with the
corresponding ones for the spin-1/2 Ising chain in a longitudinal or transverse
field and the spin-1/2 $XX$ chain in a transverse field. The inverse
compressibility of the spin-1/2 $XX$ chain in a transverse field exhibits a
hysteresis in a vicinity of quantum critical point that is accompanied with the
finite jump of compressibility. Contrary to this, the inverse compressibility
diminishes continuously close to a quantum critical point of the spin-1/2 Ising
chain in a transverse field and the spin-1/2 Heisenberg-Ising bond alternating
chain.
|
[{'version': 'v1', 'created': 'Mon, 15 Oct 2012 07:13:57 GMT'}]
|
2013-04-02
|
[array(['Derzhko', 'Oleg', ''], dtype=object)
array(['Strecka', 'Jozef', ''], dtype=object)
array(['Galisova', 'Lucia', ''], dtype=object)]
|
17,784 |
1402.6352
|
Jack Lissauer
|
Jack J. Lissauer, Geoffrey W. Marcy, Stephen T. Bryson, Jason F. Rowe,
Daniel Jontof-Hutter, Eric Agol, William J. Borucki, Joshua A. Carter, Eric
B. Ford, Ronald L. Gilliland, Rea Kolbl, Kimberly M. Star, Jason H. Steffen,
Guillermo Torres
|
Validation of Kepler's Multiple Planet Candidates. II: Refined
Statistical Framework and Descriptions of Systems of Special Interest
| null | null |
10.1088/0004-637X/784/1/44
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We extend the statistical analysis of Lissauer et al. (2012, ApJ 750, 112),
which demonstrates that the overwhelming majority of Kepler candidate multiple
transiting systems (multis) represent true transiting planets, and develop
therefrom a procedure to validate large numbers of planet candidates in multis
as bona fide exoplanets. We show that this statistical framework correctly
estimates the abundance of false positives already identified around Kepler
targets with multiple sets of transit-like signatures based on their abundance
around targets with single sets of transit-like signatures. We estimate the
number of multis that represent split systems of one or more planets orbiting
each component of a binary star system. We use the high reliability rate for
multis to validate more than one dozen particularly interesting multi-planet
systems are validated in a companion paper by Rowe et al. (2014, ApJ, this
issue). We note that few very short period (P < 1.6 days) planets orbit within
multiple transiting planet systems and discuss possible reasons for their
absence. There also appears to be a shortage of planets with periods exceeding
a few months in multis.
|
[{'version': 'v1', 'created': 'Tue, 25 Feb 2014 21:20:30 GMT'}]
|
2015-06-18
|
[array(['Lissauer', 'Jack J.', ''], dtype=object)
array(['Marcy', 'Geoffrey W.', ''], dtype=object)
array(['Bryson', 'Stephen T.', ''], dtype=object)
array(['Rowe', 'Jason F.', ''], dtype=object)
array(['Jontof-Hutter', 'Daniel', ''], dtype=object)
array(['Agol', 'Eric', ''], dtype=object)
array(['Borucki', 'William J.', ''], dtype=object)
array(['Carter', 'Joshua A.', ''], dtype=object)
array(['Ford', 'Eric B.', ''], dtype=object)
array(['Gilliland', 'Ronald L.', ''], dtype=object)
array(['Kolbl', 'Rea', ''], dtype=object)
array(['Star', 'Kimberly M.', ''], dtype=object)
array(['Steffen', 'Jason H.', ''], dtype=object)
array(['Torres', 'Guillermo', ''], dtype=object)]
|
17,785 |
1404.6054
|
Ansgar J\"ungel
|
Ansgar J\"ungel and Nicola Zamponi
|
Boundedness of weak solutions to cross-diffusion systems from population
dynamics
| null | null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The global-in-time existence of nonnegative bounded weak solutions to a class
of cross-diffusion systems for two population species is proved. The
diffusivities are assumed to depend linearly on the population densities in
such a way that a certain formal gradient-flow structure holds. The main
feature of these systems is that the diffusion matrix may be neither symmetric
nor positive definite. The key idea of the proof is to employ the
boundedness-by-entropy principle which yields at the same time the existence of
global weak solutions and their boundedness. In particular, the uniform
boundedness of weak solutions to the population model of Shigesada, Kawasaki,
and Teramoto in several space dimensions under certain conditions on the
diffusivities is shown for the first time.
|
[{'version': 'v1', 'created': 'Thu, 24 Apr 2014 08:46:58 GMT'}]
|
2014-04-25
|
[array(['Jüngel', 'Ansgar', ''], dtype=object)
array(['Zamponi', 'Nicola', ''], dtype=object)]
|
17,786 |
2109.03861
|
Fangda Gu
|
Fangda Gu, He Yin, Laurent El Ghaoui, Murat Arcak, Peter Seiler, Ming
Jin
|
Recurrent Neural Network Controllers Synthesis with Stability Guarantees
for Partially Observed Systems
| null | null | null | null |
eess.SY cs.AI cs.RO cs.SY
|
http://creativecommons.org/licenses/by/4.0/
|
Neural network controllers have become popular in control tasks thanks to
their flexibility and expressivity. Stability is a crucial property for
safety-critical dynamical systems, while stabilization of partially observed
systems, in many cases, requires controllers to retain and process long-term
memories of the past. We consider the important class of recurrent neural
networks (RNN) as dynamic controllers for nonlinear uncertain
partially-observed systems, and derive convex stability conditions based on
integral quadratic constraints, S-lemma and sequential convexification. To
ensure stability during the learning and control process, we propose a
projected policy gradient method that iteratively enforces the stability
conditions in the reparametrized space taking advantage of mild additional
information on system dynamics. Numerical experiments show that our method
learns stabilizing controllers while using fewer samples and achieving higher
final performance compared with policy gradient.
|
[{'version': 'v1', 'created': 'Wed, 8 Sep 2021 18:21:56 GMT'}
{'version': 'v2', 'created': 'Tue, 7 Dec 2021 05:56:11 GMT'}]
|
2021-12-08
|
[array(['Gu', 'Fangda', ''], dtype=object)
array(['Yin', 'He', ''], dtype=object)
array(['Ghaoui', 'Laurent El', ''], dtype=object)
array(['Arcak', 'Murat', ''], dtype=object)
array(['Seiler', 'Peter', ''], dtype=object)
array(['Jin', 'Ming', ''], dtype=object)]
|
17,787 |
1902.10376
|
Dejan Paunovic
|
Nikola Tomasevic, Dejan Paunovic, Sanja Vranes
|
User-based collaborative filtering approach for content recommendation
in OpenCourseWare platforms
| null | null | null | null |
cs.IR
|
http://creativecommons.org/publicdomain/zero/1.0/
|
A content recommender system or a recommendation system represents a subclass
of information filtering systems which seeks to predict the user preferences,
i.e. the content that would be most likely positively "rated" by the user.
Nowadays, the recommender systems of OpenCourseWare (OCW) platforms typically
generate a list of recommendations in one of two ways, i.e. through the
content-based filtering, or user-based collaborative filtering (CF). In this
paper, the conceptual idea of the content recommendation module was provided,
which is capable of proposing the related decks (presentations, educational
material, etc.) to the user having in mind past user activities, preferences,
type and content similarity, etc. It particularly analyses suitable techniques
for implementation of the user-based CF approach and user-related features that
are relevant for the content evaluation. The proposed approach also envisages a
hybrid recommendation system as a combination of user-based and content-based
approaches in order to provide a holistic and efficient solution for content
recommendation. Finally, for evaluation and testing purposes, a designated
content recommendation module was implemented as part of the SlideWiki
authoring OCW platform.
|
[{'version': 'v1', 'created': 'Wed, 27 Feb 2019 08:05:40 GMT'}]
|
2019-02-28
|
[array(['Tomasevic', 'Nikola', ''], dtype=object)
array(['Paunovic', 'Dejan', ''], dtype=object)
array(['Vranes', 'Sanja', ''], dtype=object)]
|
17,788 |
1104.2273
|
Antonio F. F. Teixeira
|
F.M. Paiva and A.F.F. Teixeira
|
Tempa voja^go kaj geodezioj en ^generala relativeco / Time travel and
geodesics in general relativity
|
16 pages, 6 figures, two columns Esperanto/English
| null | null |
CBPF-NF-009/11
|
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the homogeneous metric of Som-Raychaudhuri, in general relativity, we
study the three types of geodesics: timelike, null, and spacelike; in
particular, the little known geodesics of simultaneities. We also study the
non-geodetic circular motion with constant velocity, particularly closed
timelike curves, and time travel of a voyager.
-------------------
^Ce la ^Generala Relativeco, en homogena metriko de Som-Raychaudhuri, ni
studas geodeziojn de la tri tipoj: tempa, nula, kaj spaca, speciale la malmulte
konatajn samtempajn geodeziojn. Ni anka^u studas ne-geodezian cirklan movadon
kun konstanta rapido, speciale fermitajn kurbojn de tempa tipo, kaj movadon de
voja^ganto al estinto.
|
[{'version': 'v1', 'created': 'Tue, 12 Apr 2011 17:05:15 GMT'}]
|
2011-04-13
|
[array(['Paiva', 'F. M.', ''], dtype=object)
array(['Teixeira', 'A. F. F.', ''], dtype=object)]
|
17,789 |
1810.02265
|
Hannah Schreiber
|
Svenja H\"uning, Wilfried Imrich, Judith Kloas, Hannah Schreiber,
Thomas W. Tucker
|
Distinguishing locally finite trees
| null | null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The distinguishing number $D(G)$ of a graph $G$ is the smallest number of
colors that is needed to color the vertices of $G$ such that the only color
preserving automorphism is the identity. For infinite graphs $D(G)$ is bounded
by the supremum of the valences, and for finite graphs by $\Delta(G)+1$, where
$\Delta(G)$ is the maximum valence. Given a finite or infinite tree $T$ of
bounded finite valence $k$ and an integer $c$, where $2 \leq c \leq k$, we are
interested in coloring the vertices of $T$ by $c$ colors, such that every color
preserving automorphism fixes as many vertices as possible. In this sense we
show that there always exists a $c$-coloring for which all vertices whose
distance from the next leaf is at least $\lceil\log_ck\rceil$ are fixed by any
color preserving automorphism, and that one can do much better in many cases.
|
[{'version': 'v1', 'created': 'Thu, 4 Oct 2018 15:03:01 GMT'}]
|
2018-10-05
|
[array(['Hüning', 'Svenja', ''], dtype=object)
array(['Imrich', 'Wilfried', ''], dtype=object)
array(['Kloas', 'Judith', ''], dtype=object)
array(['Schreiber', 'Hannah', ''], dtype=object)
array(['Tucker', 'Thomas W.', ''], dtype=object)]
|
17,790 |
0905.3578
|
Pere Talavera
|
J. D. Madrigal and P. Talavera
|
A note on the string spectrum at the Hagedorn temperature
|
Latex 19 pages
| null | null | null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss semi-classical string configurations at finite temperature. We
find that those soliton solution in the background describing type IIA strings
disappear or become divergent when we approach the Hagedorn temperature in the
strong coupling regime. These findings together with a semi-classical analysis
for the Hawking radiation let us to think that Hawking radiation is mainly
driven by the existence of highly excited states. As by side, we check that
beside the thermodynamical instability the system is dynamical unstable before
reaching the Hagedorn temperature.
|
[{'version': 'v1', 'created': 'Thu, 21 May 2009 22:45:56 GMT'}]
|
2009-05-25
|
[array(['Madrigal', 'J. D.', ''], dtype=object)
array(['Talavera', 'P.', ''], dtype=object)]
|
17,791 |
2302.07663
|
Federica Cugnata
|
Paola Vicard, Paola Maria Vittoria Rancoita, Federica Cugnata, Alberto
Briganti, Fulvia Mecatti, Clelia Di Serio and Pier Luigi Conti
|
Can Bayesian Network empower propensity score estimation from Real World
Data?
| null | null | null | null |
stat.ME
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
A new method, based on Bayesian Networks, to estimate propensity scores is
proposed with the purpose to draw causal inference from real world data on the
average treatment effect in case of a binary outcome and discrete covariates.
The proposed method ensures maximum likelihood properties to the estimated
propensity score, i.e. asymptotic efficiency, thus outperforming other
available approach. Two point estimators via inverse probability weighting are
then proposed, and their main distributional properties are derived for
constructing confidence interval and for testing the hypotheses of absence of
the treatment effect. Empirical evidence of the substantial improvements
offered by the proposed methodology versus standard logistic modelling of
propensity score is provided in simulation settings that mimic the
characteristics of a real dataset of prostate cancer patients from Milan San
Raffaele Hospital.
|
[{'version': 'v1', 'created': 'Wed, 15 Feb 2023 13:48:42 GMT'}]
|
2023-02-16
|
[array(['Vicard', 'Paola', ''], dtype=object)
array(['Rancoita', 'Paola Maria Vittoria', ''], dtype=object)
array(['Cugnata', 'Federica', ''], dtype=object)
array(['Briganti', 'Alberto', ''], dtype=object)
array(['Mecatti', 'Fulvia', ''], dtype=object)
array(['Di Serio', 'Clelia', ''], dtype=object)
array(['Conti', 'Pier Luigi', ''], dtype=object)]
|
17,792 |
2210.03866
|
Paul Ramond
|
Paul Ramond
|
Symplectic mechanics of spinning particles in curved spacetime: I.
Integrability in the Schwarzschild spacetime
|
29 pages, 2 figures
| null | null | null |
gr-qc math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This is the first part of a series of work aiming at settling the issue of
integrability, or lack thereof, for spinning particles around black hole
spacetimes in general relativity. In this article, we lay the analytic
foundations of this program, and present a Hamiltonian formulation of the
evolution equations for a dipolar particle moving in a background spacetime. We
explicitly construct symplectic coordinates in the phase space, discuss their
physical meaning for the rotational degrees of freedom, and prove that the spin
supplementary condition defines a sub-manifold that is invariant under the flow
of the Hamiltonian. We then apply this formalism to the Schwarzschild
spacetime, where we prove that the system is integrable in the sense of
Liouville, thanks to the Killing vectors and the Killing-Yano tensor that exist
for the Schwarzschild metric.
|
[{'version': 'v1', 'created': 'Sat, 8 Oct 2022 01:15:47 GMT'}
{'version': 'v2', 'created': 'Tue, 18 Oct 2022 20:55:21 GMT'}
{'version': 'v3', 'created': 'Mon, 20 Feb 2023 07:37:44 GMT'}]
|
2023-02-21
|
[array(['Ramond', 'Paul', ''], dtype=object)]
|
17,793 |
1109.5167
|
Steven Slotterback
|
Steven Slotterback and Mitch Mailman and Krisztian Ronaszegi and
Martin van Hecke and Michelle Girvan and Wolfgang Losert
|
Onset of Irreversibility in Cyclic Shear of Granular Packings
| null | null |
10.1103/PhysRevE.85.021309
| null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the onset of irreversibility in a dense granular medium
subjected to cyclic shear in a split-bottom geometry. To probe the micro and
mesoscale we image bead trajectories in 3D throughout a series of shear strain
oscillations. Though beads lose and regain contact with neighbors during a
cycle, the topology of the contact network exhibits reversible properties for
small oscillation amplitudes. With increasing reversal amplitude a transition
to an irreversible diffusive regime occurs.
|
[{'version': 'v1', 'created': 'Fri, 23 Sep 2011 19:30:17 GMT'}
{'version': 'v2', 'created': 'Tue, 24 Jan 2012 15:50:20 GMT'}]
|
2012-02-28
|
[array(['Slotterback', 'Steven', ''], dtype=object)
array(['Mailman', 'Mitch', ''], dtype=object)
array(['Ronaszegi', 'Krisztian', ''], dtype=object)
array(['van Hecke', 'Martin', ''], dtype=object)
array(['Girvan', 'Michelle', ''], dtype=object)
array(['Losert', 'Wolfgang', ''], dtype=object)]
|
17,794 |
1711.03226
|
Meng Qu
|
Meng Qu, Xiang Ren, Yu Zhang, Jiawei Han
|
Weakly-supervised Relation Extraction by Pattern-enhanced Embedding
Learning
| null | null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Extracting relations from text corpora is an important task in text mining.
It becomes particularly challenging when focusing on weakly-supervised relation
extraction, that is, utilizing a few relation instances (i.e., a pair of
entities and their relation) as seeds to extract more instances from corpora.
Existing distributional approaches leverage the corpus-level co-occurrence
statistics of entities to predict their relations, and require large number of
labeled instances to learn effective relation classifiers. Alternatively,
pattern-based approaches perform bootstrapping or apply neural networks to
model the local contexts, but still rely on large number of labeled instances
to build reliable models. In this paper, we study integrating the
distributional and pattern-based methods in a weakly-supervised setting, such
that the two types of methods can provide complementary supervision for each
other to build an effective, unified model. We propose a novel co-training
framework with a distributional module and a pattern module. During training,
the distributional module helps the pattern module discriminate between the
informative patterns and other patterns, and the pattern module generates some
highly-confident instances to improve the distributional module. The whole
framework can be effectively optimized by iterating between improving the
pattern module and updating the distributional module. We conduct experiments
on two tasks: knowledge base completion with text corpora and corpus-level
relation extraction. Experimental results prove the effectiveness of our
framework in the weakly-supervised setting.
|
[{'version': 'v1', 'created': 'Thu, 9 Nov 2017 01:42:14 GMT'}
{'version': 'v2', 'created': 'Tue, 26 Dec 2017 02:54:11 GMT'}]
|
2017-12-27
|
[array(['Qu', 'Meng', ''], dtype=object)
array(['Ren', 'Xiang', ''], dtype=object)
array(['Zhang', 'Yu', ''], dtype=object)
array(['Han', 'Jiawei', ''], dtype=object)]
|
17,795 |
1301.6564
|
Siddharth Tallur
|
Siddharth Tallur, Sunil A. Bhave
|
Comparison of f-Q scaling in wineglass and radial modes in ring
resonators
| null | null | null | null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Low phase noise MEMS oscillators necessitate resonators with high f-Q.
Resonators achieving high f-Q (mechanical frequency-quality factor product)
close to the thermo-elastic damping (TED) limit have been demonstrated at
expense of feed-through. Here we present a study comparing frequency scaling of
quality factors of wineglass and radial modes in a ring resonator using an
opto-mechanical two port transmission measurement. Higher harmonics of the
wineglass mode show an increasing trend in the f-Q product, as compared to a
saturation of f-Q for radial modes. The measured f-Q of 5.11e13Hz at 9.82GHz in
air at room temperature for a wineglass mode is close to the highest measured
values in silicon resonators.
|
[{'version': 'v1', 'created': 'Mon, 28 Jan 2013 14:53:16 GMT'}]
|
2013-01-29
|
[array(['Tallur', 'Siddharth', ''], dtype=object)
array(['Bhave', 'Sunil A.', ''], dtype=object)]
|
17,796 |
1106.2289
|
Abdelkrim Bouramoul
|
Abdelkrim Bouramoul, Mohamed-Khireddine Kholladi, Bich-Lien Doan
|
PRESY: A Context Based Query Reformulation Tool for Information
Retrieval on the Web
|
8 pages
|
Journal of Computer Science (JCS) - ISSN: 15493636, Vol.6, No.4 :
470-477, April 2010
|
10.3844/jcssp.2010.470.477
| null |
cs.IR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Problem Statement: The huge number of information on the web as well as the
growth of new inexperienced users creates new challenges for information
retrieval. It has become increasingly difficult for these users to find
relevant documents that satisfy their individual needs. Certainly the current
search engines (such as Google, Bing and Yahoo) offer an efficient way to
browse the web content. However, the result quality is highly based on uses
queries which need to be more precise to find relevant documents. This task
still complicated for the majority of inept users who cannot express their
needs with significant words in the query. For that reason, we believe that a
reformulation of the initial user's query can be a good alternative to improve
the information selectivity. This study proposes a novel approach and presents
a prototype system called PRESY (Profile-based REformulation SYstem) for
information retrieval on the web. Approach: It uses an incremental approach to
categorize users by constructing a contextual base. The latter is composed of
two types of context (static and dynamic) obtained using the users' profiles.
The architecture proposed was implemented using .Net environment to perform
queries reformulating tests. Results: The experiments gives at the end of this
article show that the precision of the returned content is effectively
improved. The tests were performed with the most popular searching engine (i.e.
Google, Bind and Yahoo) selected in particular for their high selectivity.
Among the given results, we found that query reformulation improve the first
three results by 10.7% and 11.7% of the next seven returned elements. So as we
can see the reformulation of users' initial queries improves the pertinence of
returned content.
|
[{'version': 'v1', 'created': 'Sun, 12 Jun 2011 08:41:40 GMT'}]
|
2011-06-14
|
[array(['Bouramoul', 'Abdelkrim', ''], dtype=object)
array(['Kholladi', 'Mohamed-Khireddine', ''], dtype=object)
array(['Doan', 'Bich-Lien', ''], dtype=object)]
|
17,797 |
1709.00022
|
Atul Dixit
|
Atul Dixit and Bibekananda Maji
|
Generalized Lambert series and arithmetic nature of odd zeta values
|
25 pages, submitted for publication; title changed from 'An extension
of the Kanemitsu-Tanigawa-Yoshimoto theorem on a generalized Lambert series
and its implications' to the current one; basic content remains the same;
reorganized some of the material
|
Proceedings of the Royal Society of Edinburgh: Section A
Mathematics 150 (2020) 741-769
|
10.1017/prm.2018.146
| null |
math.NT math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is pointed out that the generalized Lambert series
$\displaystyle\sum_{n=1}^{\infty}\frac{n^{N-2h}}{e^{n^{N}x}-1}$ studied by
Kanemitsu, Tanigawa and Yoshimoto can be found on page $332$ of Ramanujan's
Lost Notebook in a slightly more general form. We extend an important
transformation of this series obtained by Kanemitsu, Tanigawa and Yoshimoto by
removing restrictions on the parameters $N$ and $h$ that they impose. From our
extension we deduce a beautiful new generalization of Ramanujan's famous
formula for odd zeta values which, for $N$ odd and $m>0$, gives a relation
between $\zeta(2m+1)$ and $\zeta(2Nm+1)$. A result complementary to the
aforementioned generalization is obtained for any even $N$ and
$m\in\mathbb{Z}$. It generalizes a transformation of Wigert and can be regarded
as a formula for $\zeta\left(2m+1-\frac{1}{N}\right)$. Applications of these
transformations include a generalization of the transformation for the
logarithm of Dedekind eta-function $\eta(z)$, Zudilin- and Rivoal-type results
on transcendence of certain values, and a transcendence criterion for Euler's
constant $\gamma$.
|
[{'version': 'v1', 'created': 'Thu, 31 Aug 2017 18:06:49 GMT'}
{'version': 'v2', 'created': 'Fri, 6 Oct 2017 07:32:29 GMT'}
{'version': 'v3', 'created': 'Wed, 14 Feb 2018 05:02:42 GMT'}]
|
2020-04-01
|
[array(['Dixit', 'Atul', ''], dtype=object)
array(['Maji', 'Bibekananda', ''], dtype=object)]
|
17,798 |
1607.00788
|
Patrick Espy
|
Nora H. Stray, Rosmarie J. deWit, Patrick J. Espy and Robert E.
Hibbins
|
Observational evidence for temporary planetary wave forcing of the MLT
during fall equinox
| null | null |
10.1002/2014GL061119
| null |
physics.space-ph physics.ao-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present direct observations of zonal wave numbers 1 and 2 planetary wave
activity in the mesopause region derived from a longitudinal chain of
high-latitude Northern Hemisphere (51-66$^{\circ}$N) Super Dual Auroral Radar
Network radars. Over a 9 year period (2000-2008), the planetary wave activity
observed shows a consistent increase around the fall equinox. This is shown to
be coincident with a minimum in the magnitude of the stratospheric winds and
consequently a minimum in the stratospheric gravity wave filtering and the
subsequent momentum deposition in the mesopause region. Despite this, the
observed meridional winds are shown to be perturbed poleward and mesopause
temperatures rise temporarily, suggesting that westward momentum deposition
from planetary waves temporarily becomes the dominant forcing on the mesopause
region each fall equinox.
|
[{'version': 'v1', 'created': 'Mon, 4 Jul 2016 09:16:00 GMT'}]
|
2016-08-08
|
[array(['Stray', 'Nora H.', ''], dtype=object)
array(['deWit', 'Rosmarie J.', ''], dtype=object)
array(['Espy', 'Patrick J.', ''], dtype=object)
array(['Hibbins', 'Robert E.', ''], dtype=object)]
|
17,799 |
1512.03337
|
John Baez
|
John C. Baez and Nina Otter
|
Operads and Phylogenetic Trees
|
48 pages, 3 figures
|
Theory and Applications of Categories, Vol. 32 No. 40 (2017),
1397-1453
| null | null |
math.CT math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We construct an operad $\mathrm{Phyl}$ whose operations are the edge-labelled
trees used in phylogenetics. This operad is the coproduct of $\mathrm{Com}$,
the operad for commutative semigroups, and $[0,\infty)$, the operad with unary
operations corresponding to nonnegative real numbers, where composition is
addition. We show that there is a homeomorphism between the space of $n$-ary
operations of $\mathrm{Phyl}$ and $\mathcal{T}_n\times [0,\infty)^{n+1}$, where
$\mathcal{T}_n$ is the space of metric $n$-trees introduced by Billera, Holmes
and Vogtmann. Furthermore, we show that the Markov models used to reconstruct
phylogenetic trees from genome data give coalgebras of $\mathrm{Phyl}$. These
always extend to coalgebras of the larger operad $\mathrm{Com} + [0,\infty]$,
since Markov processes on finite sets converge to an equilibrium as time
approaches infinity. We show that for any operad $O$, its coproduct with
$[0,\infty]$ contains the operad $W(O)$ constucted by Boardman and Vogt. To
prove these results, we explicitly describe the coproduct of operads in terms
of labelled trees.
|
[{'version': 'v1', 'created': 'Thu, 10 Dec 2015 17:32:48 GMT'}
{'version': 'v2', 'created': 'Thu, 31 Dec 2015 19:36:17 GMT'}
{'version': 'v3', 'created': 'Thu, 3 Aug 2017 06:45:46 GMT'}]
|
2018-11-22
|
[array(['Baez', 'John C.', ''], dtype=object)
array(['Otter', 'Nina', ''], dtype=object)]
|
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