cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A one-parameter family of interpolating kernels for Smoothed Particle Hydrodynamics studies
Creators: name: Cabezon, Ruben M.
name: Garcia-Senz, Domingo
name: Relaño, Antonio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A set of interpolating functions of the type f(v)={(sin[v pi/2])/(v pi/2)}^n is analyzed in the context of the smoothed-particle hydrodynamics (SPH) technique. The behaviour of these kernels for several values of the parameter n has been studied either analytically as well as numerically in connection with several tests carried out in two dimensions. The main advantage of this kernel relies in its flexibility because for n=3 it is similar to the standard widely used cubic-spline, whereas for n>3 the interpolating function becomes more centrally condensed, being well suited to track discontinuities such as shock fronts and thermal waves.
description: 36 pages, 12 figures (low-resolution), published in J.C.P
Stochastic Electron Acceleration in Shell-Type Supernova Remnants II
Creators: name: Liu, Siming
name: Fan, Zhong-Hui
name: Fryer, Christopher L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the generic characteristics of stochastic particle acceleration by a fully developed turbulence spectrum and show that resonant interactions of particles with high speed waves dominate the acceleration process. To produce the relativistic electrons inferred from the broadband spectrum of a few well-observed shell-type supernova remnants in the leptonic scenario for the TeV emission, fast mode waves must be excited effectively in the downstream and dominate the turbulence in the subsonic phase. Strong collisionless non-relativistic astrophysical shocks are studied with the assumption of a constant Aflven speed. The energy density of non-thermal electrons is found to be comparable to that of the magnetic field. With reasonable parameters, the model explains observations of shell-type supernova remnants. More detailed studies are warranted to better understand the nature of supernova shocks.
description: 5 pages, 7 figures, submitted to Proceedings of the Conference on "2008 Heidelberg International Symposium on High Energy Gamma-Ray Astronomy"
Dynamics of magnetization in frustrated spin-chain systems: Ca$_3$Co$_2$O$_6$
Creators: name: Kudasov, Yu. B.
name: Korshunov, A. S.
name: Pavlov, V. N.
name: Maslov, D. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The magnetization dynamics of the triangular lattice of Ising spin chains is investigated in the framework of a two-dimensional model. The rigid chains are assumed to interact with the nearest neighboring chains, an external magnetic field, and a heat reservoir that causes the chains to change their states randomly with time. A probability of a single spin-flip process is assumed in a Glauber-like form. This technique allows describing properly the steps in the magnetization curves observed in Ca$_3$Co$_2$O$_6$ and their dependence on a magnetic field sweep rate and temperature. A transition from a low-temperature to high-temperature phase is also observed.
description: 3.5 pages, 3 figures, submitted to PRB
Higgs-Higgsino-Gaugino Induced Two Loop Electric Dipole Moments
Creators: name: Li, Yingchuan
name: Profumo, Stefano
name: Ramsey-Musolf, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the complete set of Higgs-mediated chargino-neutralino two-loop contributions to the electric dipole moments (EDMs) of the electron and neutron in the minimal supersymmetric standard model (MSSM). We study the dependence of these contributions on the parameters that govern CP-violation in the MSSM gauge-gaugino-Higgs-Higgsino sector. We find that contributions mediated by the exchange of W H^\pm and Z A^0 pairs, where H^\pm and A^0 are the charged and CP-odd Higgs scalars, respectively, are comparable to or dominate over those mediated by the exchange of neutral gauge bosons and CP-even Higgs scalars. We also emphasize that the result of this complete set of diagrams is essential for the full quantitative study of a number of phenomenological issues, such as electric dipole moment searches and their implications for electroweak baryogenesis.
description: 17 pages, 5 figures, significantly revised numerical results
It is Tango time: The M&C system for LOFAR2.0 stations
Creators: name: Jürges, Thomas
name: Mol, Jan David
Publisher: name: Zenodo
Year: 2020
Subjects: telescope, instrumentation, software, monitor and control, distributed system

description: After ASTRON has gathered 10 years of experience with the LOFAR telescope's station M&C system, a reevaluation took place and it was decided that the new hardware for LOFAR2.0 stations also warrants a new M&C system. The foundation of the LOFAR2.0 station Monitor and Control system (M&C) will be the Tango Controls framework. It allows for an object oriented software architecture which naturally leads to a hierarchical alignment of the software components. The software will be developed in Python3 with the option to use C++11 where performance issues arise.
Discovery of 2716 hot emission-line stars from LAMOST DR5
Creators: name: B, Shridharan
name: Mathew, Blesson
name: S, Nidhi
name: R, Anusha
name: R, Arun
name: Kartha, Sreeja S.
name: Kumar, Yerra Bharat
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a catalog of 3339 hot emission-line stars (ELS) identified from 451,695 O, B, and A type spectra, provided by the LAMOST DR5 release. We developed an automated python routine that identified 5437 spectra having a peak between 6561 and 6568~Å. False detections and bad spectra were removed, leaving 4138 good emission-line spectra of 3339 unique ELS. We re-estimated the spectral type of 3307 spectra as the LAMOST Stellar Parameter Pipeline (LASP) did not provide accurate spectral types for these emission-line spectra. As Herbig Ae/Be stars show higher excess in near-infrared and mid-infrared wavelengths than Classical Ae/Be stars, we used 2MASS and WISE photometry to distinguish them. Finally, we report 1089 Classical Be, 233 Classical Ae, and 56 Herbig Ae/Be stars identified from the LAMOST DR5. In addition, 928 B[em]/A[em] stars and 240 CAe/CBe potential candidates are identified. From our sample of 3339 hot emission-line stars, 2716 ELS identified in this work do not have any record in the SIMBAD database and they can be considered as new detections. Identification of such a large homogeneous set of emission-line spectra will help the community to study the emission phenomenon in detail without worrying about the inherent biases when compiling from various sources.
description: 16 Pages, 7 Figures, Accepted for publication in RAA
Transcriptional dynamics of the human DMD locus
Creators: name: Erriquez, Daniela <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: BIO/18 Genetica

description: The human DMD locus encodes dystrophin protein. Absence or reduced levels of dystrophin (DMD or BMD phenotype, respectively) lead to progressive muscle wasting. Little is known about the complex coordination of dystrophin expression and its transcriptional regulation is a field of intense interest. In this work we found that DMD locus harbours multiple long non coding RNAs which orchestrate and control transcription of muscle dystrophin mRNA isoforms. These lncRNAs are tissue-specific and highly expressed during myogenesis, suggesting a possible role in tissue-specific expression of DMD gene isoforms. Their forced ectopic expression in human muscle and neuronal cells leads to a specific and negative regulation of endogenous dystrophin full lenght isoforms. An intriguing aspect regarding the transcription of the DMD locus is the gene size (2.4Mb). The mechanism that ensures the complete synthesis of the primary transcript  and the coordinated splicing of  79 exons is still completely unknown. By ChIP-on-chip analyses, we discovered novel regions never been involved before in the transcription regulation  of the DMD locus. Specifically, we observed enrichments for Pol II, P-Ser2, P-Ser5, Ac-H3 and 2Me-H3K4 in an intronic region of 3Kb (approximately 21Kb) downstream of the end of DMD exon 52 and in a region of 4Kb spanning the DMD exon 62. Interestingly, this latter region and the TSS of Dp71 are strongly marked by 3Me-H3K36, an histone modification associated with the regulation of splicing process. Furthermore, we also observed strong presence of open chromatin marks (Ac-H3 and 2Me-H3K4) around intron 34 and the exon 45 without presence of  RNA pol II. We speculate that these two regions may exert an enhancer-like function on Dp427m promoter, although further investigations are necessary. Finally, we investigated the nuclear-cytoplasmic compartmentalization of the muscular dystrophin mRNA and, specifically, we verified whether the exon skipping therapy could influence its cellular distribution.
APPEEC 2018 - High Voltage Engineering & Technology
Creators: M. Maharana
N. Baruah
S. Nayak
N. Sahoo
N. Baruah
Z. Liu
M. Haroon Nadeem
T. Yee Von
S. Huda
S. Sayem
M. A. Razzak
S. Ramadham
J. The
M. Kamarol
M. Reffin
N. Nor
S. Abdullah
N. Ahmad
M. Othman
L. Longfu
R. Zhenhua
Y. Yafei
R. Zhenhua
Publisher: name: IEEE
Year: 2018

Technical Session
This presentation was part of the 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APEEC), sponsored by the IEEE Power & Energy Society (PES). The conference was held October 7-10, 2018 in Kota Kinabalu, Malaysia.
BADIIY ASARLARDA MAFKURAVIY G'OYALARNING AKS ETTIRILISHI (A.L. QOZONCHINING "QAYNONA" ASARI MISOLIDA)
Creators: name: Bekmirzayeva, Shohsanam
name: Bozorova, Umidaxon
Publisher: name: Zenodo
Year: 2023

description: Mazkur maqolada badiiy asarlarning inson ma’naviyatiga ta’siri va ahamiyati, xususan Ahmad Lutfi Qozonchining  “Qaynona”  asarida odob , axloq, sofdillik va insoniylik g’oyalarining aks ettirilishi to’g’risida so’z boradi.
APPEEC 2018 - Power System Planning and Operation
Creators: V. Sewdien
H. Li
D. Feng
T. Zhang
T. Chen
W. Hu
F. Bai
X. Zhou
A. Gupta
T. Alpcan
A. Morton
Publisher: name: IEEE
Year: 2018

Technical Session
This presentation was part of the 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APEEC), sponsored by the IEEE Power & Energy Society (PES). The conference was held October 7-10, 2018 in Kota Kinabalu, Malaysia.
Persistence of periodic and homoclinic orbits, first integrals and commutative vector fields in dynamical systems
Creators: name: Motonaga, Shoya
name: Yagasaki, Kazuyuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 34C14, 34C40, 34D10, 37C27, 37C29

description: We study persistence of periodic and homoclinic orbits, first integrals and commutative vector fields in dynamical systems depending on a small parameter $\varepsilon>0$ and give several necessary conditions for their persistence. Here we treat homoclinic orbits not only to equilibria but also to periodic orbits. We also discuss some relationships of these results with the standard subharmonic and homoclinic Melnikov methods for time-periodic perturbations of single-degree-of-freedom Hamiltonian systems, and with another version of the homoclinic Melnikov method for autonomous perturbations of multi-degree-of-freedom Hamiltonian systems. In particular, we show that a first integral which converges to the Hamiltonian or another first integral as the perturbation tends to zero does not exist near the unperturbed periodic or homoclinic orbits in the perturbed systems if the subharmonic or homoclinic Melnikov functions are not identically zero on connected open sets. We illustrate our theory for four examples: The periodically forced Duffing oscillator, two identical pendula coupled with a harmonic oscillator, a periodically forced rigid body and a three-mode truncation of a buckled beam.
description: 33pages, 6 figures
APPEEC 2018 - Electric and Hybrid Vehicles
Creators: M. Shahadat Hossain Lipu
M. Toufikur Rahman
K. E.I. Elnail
D. Zhou
B. Tan
J. Zhao
Zhe Chen
N. Jiao
Publisher: name: IEEE
Year: 2018

Technical Session
This presentation was part of the 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APEEC), sponsored by the IEEE Power & Energy Society (PES). The conference was held October 7-10, 2018 in Kota Kinabalu, Malaysia.
New Integral Representations for the Bessel Functions
Creators: name: Abdulsalam, Abdulhafeez A.
name: Egwe, M. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 33C10, 33C05, 33B15

description: In this paper, new integral representations for the Bessel $J$ and $I$ functions were presented and their results were used to derive an expression for the Modified Bessel $K$ function.
description: 26 pages, 2 figures; correspondence author corrected
APPEEC 2018 - Renewable & Sustainable Energy
Creators: X. Liao
Z. Min
N. Wang
J. Li
P. Wang
Z. Zhang
W. Hu
Q. Huang
Y. Hu
Y. Wu
H. Nabipour-Afrouzi
S. Yii
J. Ahmad
M. Tabassum
C. Peter Christian C. Caampued
R. Aguirre
Jr.
D. Wu
N. Gokmen
W. Hu
X. Xu
Z. Chen
Publisher: name: IEEE
Year: 2018

Technical Session
This presentation was part of the 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APEEC), sponsored by the IEEE Power & Energy Society (PES). The conference was held October 7-10, 2018 in Kota Kinabalu, Malaysia.
APPEEC 2018 - Smart Grid & Utility Applications
Creators: Z. Li
C. Guo
A. Maulik
D. Das
X. Sun
N. Mahdavi
J. Braslavsky
F. Asarias
M. Angelo Pedrasa
R. Guerrero Jr.
M. Angelo Pedrasa
A. Maulik
D. Das
Publisher: name: IEEE
Year: 2018

Technical Session
This presentation was part of the 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APEEC), sponsored by the IEEE Power & Energy Society (PES). The conference was held October 7-10, 2018 in Kota Kinabalu, Malaysia.
APPEEC 2018 - Power System Planning and Operation
Creators: L. Yang
J. Kellermann
C. Bredtmann
A. Moser
Z. Liu
F. M. R. Aditya
B. Kwon
R. Park
S. Jo
K. Song
J. Jose
A. Kowli
DC Hapuarachchi
K.T.M.U. Hemapala
AGBP Jayasekara
N. Sallehuddin
Publisher: name: IEEE
Year: 2018

Technical Session
This presentation was part of the 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APEEC), sponsored by the IEEE Power & Energy Society (PES). The conference was held October 7-10, 2018 in Kota Kinabalu, Malaysia.
The rally ‘round the flag effect in third parties: the case of the Russian invasion of Ukraine
Creators: name: Fukumoto, Kentaro
name: Tabuchi, Takahiro
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: Mental Health

description: Immediately after the onset of a war, the popularity of the head of a warring government suddenly surges. Known as the “rally ‘round the flag effect”, this phenomenon may well spill over to third-party countries that are not actually at war. This paper specifically studies the case of the Russian invasion of Ukraine. We exploited the results of surveys in Czechia, Japan, and Uruguay that were already underway when the conflict began. We identify the indirect rally effect of the war on citizens' support for the party of the head of government by comparing respondents who joined the surveys before or after the outbreak of the war. We found that the war increased approval for the national leader's party by around three percentage points in Japan and six percentage points in Uruguay, which is comparable to the size of direct rally effects. However, this was not the case in Czechia.
APPEEC 2018 - Renewable & Sustainable Energy
Creators: Z. Jiujiang
X. Xu
W. Hu
Q. Huang
Z. Chen
V. Jack Chin
Z. Salam
N. Tutkun
K. Gegin
N. Sarma
Z. Salam
J. Li
X. Wu
W. Hu
Q. Huang
Y. Fu
W. Hu
M. Tang
R. Yu
B. Liu
Publisher: name: IEEE
Year: 2018

Technical Session
This presentation was part of the 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APEEC), sponsored by the IEEE Power & Energy Society (PES). The conference was held October 7-10, 2018 in Kota Kinabalu, Malaysia.
APPEEC 2018 - Power System Analysis
Creators: S. Zhu
Y. Ren
R. Yina
S. Zhu
C. Zhao
Z. Huang
Y. Zhang
X. Lou
A. Mohammed Al-Mahrouk
M. Ado
A. Jasoh
A. U. Mutawakkil
S. Ayob
Publisher: name: IEEE
Year: 2018

Technical Session
This presentation was part of the 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APEEC), sponsored by the IEEE Power & Energy Society (PES). The conference was held October 7-10, 2018 in Kota Kinabalu, Malaysia.
APPEEC 2018 - Power Quality, Protection & Electromagnetic Compatibility
Creators: S. Myint
W. Wichakool
P. Santiprapan
R. T. Senthilkumar
OD Naidu
AK Pradhan
W. Zhao
Z. Tang
Y. Zhang
H. Li
R. Ota
R. Kinjo
H. Matayoshi
S. Tomonbu
AM Howlader
H. N. Afrouzi
P. Liu
H. Li
X. Niu
J. Lu
J. Xu
Z. Bai
Y. Liu
Y. Yan
Publisher: name: IEEE
Year: 2018

Technical Session
This presentation was part of the 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APEEC), sponsored by the IEEE Power & Energy Society (PES). The conference was held October 7-10, 2018 in Kota Kinabalu, Malaysia.
APPEEC 2018 - Power System Planning and Operation
Creators: Z. Ma
H. Cheng
S. Fang
Y. Feng
N. Feng
S. Barik
D. Das
T. Mustafa
S. Cabral
H. Almaguer
L. Meyer
L. Puchale
G. Vier
J. Cereja
H. Aoyagi
T. Ahmed
S. Mekhilef
R. Shah
T. Urmee
D. Xu
P. Wang
B. Zhou
G. Feng
L. Huang
W. Li
V. Pakka
Y. Bhatt
D. Bhatt
N. Salim
A. Azmi
A. Khamis
N. Zambri
Publisher: name: IEEE
Year: 2018

Technical Session
This presentation was part of the 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APEEC), sponsored by the IEEE Power & Energy Society (PES). The conference was held October 7-10, 2018 in Kota Kinabalu, Malaysia.
MPEC 2024-S182 : Editorial Notice: Edgar Wilson Award
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Dispersive--reflection spectroscopy in the far infrared
Creators: name: Staal, Philip Ralph
Publisher: name: University of British Columbia
Year: 2010

description: A dispersive reflection spectrometer has been built in which the fixed mirror of a commercial far-infrared Michelson interferometer is replaced by a polished sample. This allows one to measure simultaneously and accurately both the amplitude reflectance of the sample and the phase change upon reflection. From these quantities, the complete optical properties can be easily obtained without the need for restrictive and sometimes inaccurate Kramers-Kronig analyses. An optical system has been designed and built in which an eight-section switching mask is placed in front of a partly-aluminized sample, which ratios out many sample surface imperfections and eliminates most asymmetries due to the spectrometer's optics. Furthermore, by alternately switching between the sample and the reference surfaces at each step of the moving mirror, simultaneous interferograms are obtained, thereby removing most of the remaining causes of phase errors which have previously limited the accuracy of this powerful technique. Although extension of these techniques to liquid-helium temperatures is difficult, a dewar is described which allows dispersive measurements on samples at temperatures at least as low as 25 K. High-resolution results are presented for NaCl from 25 to 500 cm⁻¹. These are compared with ab-initio calculations of the damping of the transverse, optic resonance due to cubic and quartic anharmonicity. Shell-model lattice-dynamical data are used as input for the calculations and corrections are also made for the damping of the "final-state" phonons. The overall agreement is excellent at room temperature and good at 48 K.
Dynamics of Disordered Mechanical Systems with Large Connectivity, Free Probability Theory, and Quasi-Hermitian Random Matrices
Creators: name: Feinberg, Joshua
name: Riser, Roman
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Disordered mechanical systems with high connectivity represent a limit opposite to the more familiar case of disordered crystals. Individual ions in a crystal are subjected essentially to nearest-neighbor interactions. In contrast, the systems studied in this paper have all their degrees of freedom coupled to each other. Thus, the problem of linearized small oscillations of such systems involves two full positive-definite and non-commuting matrices, as opposed to the sparse matrices associated with disordered crystals. Consequently, the familiar methods for determining the averaged vibrational spectra of disordered crystals, introduced many years ago by Dyson and Schmidt, are inapplicable for highly connected disordered systems. In this paper we apply random matrix theory to calculate the averaged vibrational spectra of such systems, in the limit of infinitely large system size. We calculate the average spectrum of the product of two positive definite random matrices by means of free probability theory techniques. We also show that this problem is intimately related with quasi-hermitian random matrix theory. The analytical results we obtain for the spectrum agree well with our numerical results. The latter also exhibit oscillations at the high-frequency band edge, which fit well the Airy kernel pattern. We also compute inverse participation ratios of the corresponding amplitude eigenvectors and demonstrate that they are all extended, in contrast with conventional disordered crystals. In addition to matrix model analysis, we study the vibrational spectra of various multi-segmented disordered pendula, as concrete realizations of highly connected mechanical systems. A universal feature of the density of vibration modes, common to both pendula and the matrix model, is that it tends to a non-zero constant at vanishing frequency.
description: 14 pages, 13 figures. arXiv admin note: substantial text overlap with arXiv:2012.05964
Model averaging estimation of panel data models with many instruments and boosting
Creators: name: Hao, Hao
name: Huang, Bai
name: Lee, Tae-hwy
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Biotechnology
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Applied researchers often confront two issues when using the fixed effect-two-stage least squares (FE-2SLS) estimator for panel data models. One is that it may lose its consistency due to too many instruments. The other is that the gain of using FE-2SLS may not exceed its loss when the endogeneity is weak. In this paper, an L2Boosting regularization procedure for panel data models is proposed to tackle the many instruments issue. We then construct a Stein-like model-averaging estimator to take advantage of FE and FE-2SLS-Boosting estimators. Finite sample properties are examined in Monte Carlo and an empirical application is presented.
A new method for estimating Sharpe ratio function via local maximum likelihood
Creators: name: Xu, Wenchao
name: Lin, Hongmei
name: Tong, Tiejun
name: Zhang, Riquan
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Mathematical Sciences not elsewhere classified

description: The Sharpe ratio function is a commonly used risk/return measure in financial econometrics. To estimate this function, most existing methods take a two-step procedure that first estimates the mean and volatility functions separately and then applies the plug-in method. In this paper, we propose a direct method via local maximum likelihood to simultaneously estimate the Sharpe ratio function and the negative log-volatility function as well as their derivatives. We establish the joint limiting distribution of the proposed estimators, and moreover extend the proposed method to estimate the multivariate Sharpe ratio function. We also evaluate the numerical performance of the proposed estimators through simulation studies, and compare them with existing methods. Finally, we apply the proposed method to the three-month US Treasury bill data and that captures a well-known covariate-dependent effect on the Sharpe ratio.
Atomic structure optimization with machine-learning enabled interpolation between chemical elements
Creators: name: Kaappa, Sami
name: Larsen, Casper
name: Jacobsen, Karsten Wedel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We introduce a computational method for global optimization of structure and ordering in atomic systems. The method relies on interpolation between chemical elements, which is incorporated in a machine learning structural fingerprint. The method is based on Bayesian optimization with Gaussian processes and is applied to the global optimization of Au-Cu bulk systems, Cu-Ni surfaces with CO adsorption, and Cu-Ni clusters. The method consistently identifies low-energy structures, which are likely to be the global minima of the energy. For the investigated systems with 23-66 atoms, the number of required energy and force calculations is in the range 3-75.
Bayesian dynamic network modelling: an application to metabolic associations in cardiovascular diseases
Creators: name: Molinari, Marco
name: Cremaschi, Andrea
name: De Iorio, Maria
name: Chaturvedi, Nishi
name: Hughes, Alun
name: Tillin, Therese
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: We propose a novel approach to the estimation of multiple Graphical Models to analyse temporal patterns of association among a set of metabolites over different groups of patients. Our motivating application is the Southall And Brent REvisited (SABRE) study, a tri-ethnic cohort study conducted in the UK. We are interested in identifying potential ethnic differences in metabolite levels and associations as well as their evolution over time, with the aim of gaining a better understanding of different risk of cardio-metabolic disorders across ethnicities. Within a Bayesian framework, we employ a nodewise regression approach to infer the structure of the graphs, borrowing information across time as well as across ethnicities. The response variables of interest are metabolite levels measured at two time points and for two ethnic groups, Europeans and South-Asians. We use nodewise regression to estimate the high-dimensional precision matrices of the metabolites, imposing sparsity on the regression coefficients through the dynamic horseshoe prior, thus favouring sparser graphs. We provide the code to fit the proposed model using the software Stan, which performs posterior inference using Hamiltonian Monte Carlo sampling, as well as a detailed description of a block Gibbs sampling scheme.
Global solutions of a doubly tactic resource consumption model with logistic source
Creators: name: Wang, Jianping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study a doubly tactic resource consumption model \bess \left\{\begin{array}{lll} u_t=\tr u-\nabla\cd(u\nabla w),\\[1mm] v_t=\tr v-\nabla\cd(v\nabla u)+v(1-v^{β-1}),\\[1mm] w_t=\tr w-(u+v)w-w+r \end{array}\right. \eess in a smooth bounded domain $\oo\in\R^2$ with homogeneous Neumann boundary conditions, where $r\in C^1(\barΩ\times[0,\infty))\cap L^\infty(Ω\times(0,\infty))$ is a given nonnegative function fulfilling \bess \int_t^{t+1}\ii|\nn\sqrt{r}|^20. \eess It is shown that, firstly, if $β>2$, then the corresponding Neumann initial-boundary problem admits a global bounded classical solution. Secondly, when $β=2$, the Neumann initial-boundary problem admits a global generalized solution.
description: 21 pages
Thermodynamics of natural images
Creators: name: Stephens, Greg J
name: Mora, Thierry
name: Tkacik, Gasper
name: Bialek, William
Publisher: name: arXiv
Year: 2008
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The scale invariance of natural images suggests an analogy to the statistical mechanics of physical systems at a critical point. Here we examine the distribution of pixels in small image patches and show how to construct the corresponding thermodynamics. We find evidence for criticality in a diverging specific heat, which corresponds to large fluctuations in how "surprising" we find individual images, and in the quantitative form of the entropy vs. energy. The energy landscape derived from our thermodynamic framework identifies special image configurations that have intrinsic error correcting properties, and neurons which could detect these features have a strong resemblance to the cells found in primary visual cortex.
title: Применение системы электронного голосования в ходе проведения праймериз
title: Application of the Electronic Voting System During the Primerises
Creators: name: Мизелифова, Эльвира Абрудиновна
Publisher: name: Издательский центр СурГУ
Year: 2021

description: В статье определено понятие предварительного голосования (праймериз) и рассмотрена нормативная основа его проведения, проанализирован порядок проведения предварительного голосования в электронном виде, рассмотрена практика применения электронного предварительного голосования и перспективы дальнейшего развития электронного голосования на выборах.
description: The article defines the concept of preliminary voting (primaries) and considers the regulatory framework for its conduct, analyzes the procedure for conducting preliminary voting in electronic form, considers the practice of using electronic preliminary voting and the prospects for the further development of electronic voting in elections.
Potentially Diagonalisable Lifts with Controlled Hodge-Tate Weights
Creators: name: Bartlett, Robin
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2021

description: Motivated by the weight part of Serre's conjecture we consider the following question. Let $K/\mathbb{Q}_p$ be a finite extension and suppose $\overline{\rho} : G_K \rightarrow \operatorname{GL}_n(\overline{\mathbb{F}}_p)$ admits a crystalline lift with Hodge-Tate weights contained in the range $[0,p]$. Does $\overline{\rho}$ admit a potentially diagonalisable crystalline lift of the same Hodge-Tate weights? We answer this question in the affirmative when $K = \mathbb{Q}_p$ and $n \leq 5$, and $\overline{\rho}$ satisfies a mild 'cyclotomic-free' condition. We also prove partial results when $K/\mathbb{Q}_p$ is unramified and $n$ is arbitrary.
description: DOCUMENTA MATHEMATICA, Vol 26 (2021), p. 795-827
Hearts for Commutative Noetherian Rings: Torsion Pairs and Derived Equivalences
Creators: name: Pavon, Sergio
name: Vitória, Jorge
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2021

description: Over a commutative noetherian ring $R$, the prime spectrum controls, via the assignment of support, the structure of both $\Mod(R)$ and $\sf{D}(R)$. We show that, just like in $\Mod(R)$, the assignment of support classifies hereditary torsion pairs in the heart of any nondegenerate compactly generated $t$-structure of $\sf{D}(R)$. Moreover, we investigate whether these $t$-structures induce derived equivalences, obtaining a new source of Grothendieck categories which are derived equivalent to $\Mod(R)$.
description: DOCUMENTA MATHEMATICA, Vol 26 (2021), p. 829-871
MOSS I: Double radio relics in the Saraswati supercluster
Creators: name: Parekh, V.
name: Kincaid, R.
name: Thorat, K.
name: Hugo, B.
name: Sankhyayan, S.
name: Kale, R.
name: Oozeer, N.
name: Smirnov, O.
name: Heywood, I.
name: Makhathini, S.
name: van der Heyden, K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Superclusters are the largest objects in the Universe, and they provide a unique opportunity to study how galaxy clusters are born at the junction of the cosmic web as well as the distribution of magnetic fields and relativistic particles beyond cluster volume. The field of radio astronomy is going through an exciting and important era of the Square Kilometer Array (SKA). We now have the most sensitive functional radio telescopes, such as the MeerKAT, which offers high angular resolution and sensitivity towards diffuse and faint radio sources. To study the radio environments around supercluster, we observed the (core part of) {\it Saraswati} supercluster with the MeerKAT. From our MeerKAT Observation of the {\it Saraswati} Supercluster (MOSS) project, the initial results of the pilot observations of two massive galaxy clusters, A2631 and ZwCl2341.1+0000, which are located around the dense central part of the {\it Saraswati} supercluster, were discussed. In this paper, we describe the observations and data analysis details, including direction-dependent calibration. In particular, we focus on the ZwCl2341.1+0000 galaxy cluster, which hosts double radio relics and puzzling diffuse radio source in the filamentary network. We have imaged these double radio relics in our high resolution and sensitive L-band MeerKAT observation and a puzzling radio source, located between relics, in the low-resolution image. We also derived the spectra of double radio relics using MeerKAT and archival GMRT observations. A following papers will focus on the formation of radio relics and halo, as well as radio galaxy properties in a supercluster core environment.
description: 17 pages, 12 figures
title: Отдельные аспекты правоотношений ветвевладельцев при эксплуатации железнодорожных путей необщего пользования
title: Certain Aspects of Legal Relations of Railway Track Owners in the Operation of a Non-use Railroad Track
Creators: name: Налбандян, Елена Левоновна
Publisher: name: Издательский центр СурГУ
Year: 2021

description: В статье рассмотрены некоторые проблемы договорных отношений при эксплуатации железнодорожных путей необщего пользования. Проанализирована сложившаяся судебная практика по спорам, связанным с эксплуатацией железнодорожных путей необщего пользования, в том числе при отсутствии прямого доступа к путям общего пользования у владельца подъездных путей.
description: The article draws attention to some problems of contractual relations in the operation of a public railroad track. The existing court practice in disputes related to the operation of a public track, including in the absence of direct access to the public track of the siding track owner is analyzed.
Neutrino oscillations beyond the Standard Model
Creators: name: del Aguila, F.
name: Syska, J.
name: Zralek, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We address the possible impact of New Physics on neutrino oscillation experiments. This can modify the neutrino production, propagation and/or detection, making the full cross section non-factorizable in general. Thus, for example, the neutrino flux may not be properly described assuming an unitary MNS matrix and/or neutrinos may propagate differently depending of their Dirac or Majorana character. Interestingly enough, present limits on New Physics still allow for observable effects at future neutrino experiments.
description: 2 pages, 2 figures, Presented at the Neutrino 08 Conference, Christchurch, New Zealand, May 25-31, 2008
A construction of Einstein-Weyl spaces via LeBrun-Mason type twistor correspondence
Creators: name: Nakata, Fuminori
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C28; 32G10; 32C50; 53A30; 53C25

description: We construct infinitely many Einstein-Weyl structures on $S^2 \times R$ of signature (-++) which is sufficiently close to the model case of constant curvature, and whose space-like geodesics are all closed. Such structures are obtained from small perturbations of the diagonal of $CP^1 \times CP^1$ using the method of LeBrun-Mason type twistor theory. The geometry of constructed Einstein-Weyl space is well understood from the configuration of holomorphic disks. We also review Einstein-Weyl structures and their properties in the former half of this article.
description: 34pages; definition 1.5 added, proof of Lemma 7.2 replaced
Non-Statistical Effects in Neutron Capture
Creators: name: Koehler, P. E.
name: Bredeweg, T. A.
name: Guber, K. H.
name: Harvey, J. A.
name: ODonnell, J. M.
name: Reifarth, R.
name: Rundberg, R. S.
name: Ullmann, J. L.
name: Vieira, D. J.
name: Wiarda, D.
name: Wouters, J. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: There have been many reports of non-statistical effects in neutron-capture measurements. However, reports of deviations of reduced-neutron-width distributions from the expected Porter-Thomas (PT) shape largely have been ignored. Most of these deviations have been reported for odd-A nuclides. Because reliable spin (J) assignments have been absent for most resonances for such nuclides, it is possible that reported deviations from PT might be due to incorrect J assignments. We recently developed a new method for measuring spins of neutron resonances by using the DANCE detector at LANSCE. Measurements made with a 147Sm sample allowed us to determine spins of almost all known resonances below 1 keV. Furthermore, analysis of these data revealed that the reduced-neutron-width distribution was in good agreement with PT for resonances below 350 eV, but in disagreement with PT for resonances between 350 and 700 eV. Our previous (n,alpha) measurements had revealed that the alpha strength function also changes abruptly at this energy. There currently is no known explanation for these two non-statistical effects. Recently, we have developed another new method for determining the spins of neutron resonances. To implement this technique required a small change (to record pulse-height information for coincidence events) to a much simpler apparatus: A pair of C6D6 gamma-ray detectors which we have employed for many years to measure neutron-capture cross sections at ORELA. Measurements with a 95Mo sample revealed that not only does the method work very well for determining spins, but it also makes possible parity assignments. Taken together, these new techniques at LANSCE and ORELA could be very useful for further elucidation of non-statistical effects.
description: 8 pages, 3 figures, for proceedings of CGS13
Optimal positive-operator-valued measures for unambiguous state discrimination
Creators: name: Samsonov, Boris F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Optimization of the mean efficiency for unambiguous (or error free)discrimination among $N$ given linearly independent nonorthogonal states should be realized in a way to keep the probabilistic quantum mechanical interpretation. This imposes a condition on a certain matrix to be positive semidefinite. We reformulated this condition in such a way that the conditioned optimization problem for the mean efficiency was reduced to finding an unconditioned maximum of a function defined on a unit $N$-sphere for equiprobable states and on an $N$-ellipsoid if the states are given with different probabilities. We established that for equiprobable states a point on the sphere with equal values of Cartesian coordinates, which we call symmetric point, plays a special role. Sufficient conditions for a vector set are formulated for which the mean efficiency for equiprobable states takes its maximal value at the symmetric point. This set, in particular, includes previously studied symmetric states. A subset of symmetric states, for which the optimal measurement corresponds to a POVM requiring a one-dimensional ancilla space is constructed. We presented our constructions of a POVM suitable for the ancilla space dimension varying from 1 till $N$ and the Neumark's extension differing from the existing schemes by the property that it is straightforwardly applicable to the case when it is desirable to present the whole space system + ancilla as the tensor product of a two-dimensional ancilla space and the $N$-dimensional system space.
description: Thanks to the referee the paper is essentially enlarged and corrected. To be published in Phys. Rev. A
Zero Field precession and hysteretic threshold currents in spin torque oscillators with tilted polarizer
Creators: name: Zhou, Yan
name: Bonetti, S.
name: Zha, C. L.
name: Akerman, Johan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using non-linear system theory and numerical simulations we map out the static and dynamic phase diagram in zero applied field of a spin torque oscillator with a tilted polarizer (TP-STO).We find that for sufficiently large currents, even very small tilt angles (beta>1 degree) will lead to steady free layer precession in zero field. Within a rather large range of tilt angles, 1 degree< beta <19 degree, we find coexisting static states and hysteretic switching between these using only current. In a more narrow window (1 degree
description: 5 pages, 4 figures
Enhanced p-Mode Absorption seen near the Sunspot Umbral-Penumbral Boundary
Creators: name: Mathew, Shibu K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate p-mode absorption in a sunspot using SOHO/MDI high-resolution Doppler images. The Doppler power computed from a three and a half hour data set is used for studying the absorption in a sunspot. The result shows an enhancement in absorption near the umbral-penumbral boundary of the sunspot. We attempt to relate the observed absorption with the magnetic field structure of the sunspot. The transverse component of the potential field is computed using the observed SOHO/MDI line-of-sight magnetograms. A comparison of the power map and the computed potential field shows enhanced absorption near the umbral-penumbral boundary where the computed transverse field strength is higher.
description: 9 pages, 4 figures, Accepted for publication in Solar Physics
Meson and di-electron production with HADES
Creators: name: Froehlich, I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The HADES experiment, installed at GSI, Darmstadt, measures di-electron production in A+A, p/pi+N and p/pi+A collisions. Here, the pi0 and eta Dalitz decays have been reconstructed in the exclusive p+p reaction at 2.2 GeV to form a reference cocktail for long-lived di-electron sources. In the C+C reaction at 1 and 2 GeV/u, these long-lived sources have been subtracted from the measured inclusive e+e- yield to exhibit the signal from the early phase of the collision. The results suggest that resonances play an important role in dense nuclear matter.
description: Invited plenary talk at the 10th International Workshop On Meson Production, Properties And Interaction (MESON 2008) 6-10 Jun 2008, Cracow, Poland
title: KLIMONAS-Ch24-A07 - Estimation des 13 indices taphonomiques pour les principaux assemblages fauniques du Bâtiment communautaire du Secteur central de Klimonas
title: KLIMONAS-Ch24-A07 - Estimation of the 13 taphonomic indices for the main faunal assemblages of the Communal building of the Central sector of Klimonas
Creators: name: VIGNE, Jean-Denis
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
Year: 2023

description: Appendix of: Vigne J.-D., Briois F., Guilaine J. (eds.), « Klimonas, an Early Pre-Pottery Neolithic village in Cyprus », Gallia Préhistoire & Paléorient, International Supplement 1, CNRS Éditions, Paris, 2023.
description: Annexe de : Vigne J.-D., Briois F., Guilaine J. (dir.), « Klimonas, un village néolithique pré-céramique ancien à Chypre », Gallia Préhistoire & Paléorient, Supplément international 1,CNRS Éditions, Paris, 2023.
Dynamics of ferroelectric nano cluster in BaTiO3 observed as a real time correlation between two soft X-ray laser pulses
Creators: name: Ji, Kai
name: Namikawa, Kazumichi
name: Zheng, Hang
name: Nasu, Keiichiro
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We carry out a theoretical investigation to clarify the dynamic property of photo-created nano-sized ferroelectric cluster observed in the paraelectric BaTiO3 as a real time correlation of speckle pattern between two soft X-ray laser pulses, at just above the paraelectric-ferroelectric phase transition temperature. Based on a model with coupled soft X-ray photon and ferroelectric phonon mode, we study the time dependence of scattering probability by using a perturbative expansion approach. The cluster-associated phonon softening as well as central peak effects are well reproduced in the phonon spectral function via quantum Monte Carlo simulation. Besides, it is found that the time dependence of speckle correlation is determined by the relaxation dynamics of ferroelectric clusters. Near the transition point, cluster excitation is stable, leading to a long relaxation time. While, at high temperature, cluster structure is subject to the thermal fluctuation, ending up with a short relaxation time.
description: 9 pages, 3 figures
Einstein-Podolsky-Rosen uncertainty limits for bipartite multimode states
Creators: name: Marian, Paulina
name: Marian, Tudor A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Certification and quantification of correlations for multipartite states of quantum systems appear to be a central task in quantum information theory. We give here a unitary quantum-mechanical perspective of both entanglement and Einstein-Podolsky-Rosen (EPR) steering of continuous-variable multimode states. This originates in the Heisenberg uncertainty relations for the canonical quadrature operators of the modes. Correlations of two-party $(N\, \text{vs} \,1)$-mode states are examined by using the variances of a pair of suitable EPR-like observables. It turns out that the uncertainty sum of these nonlocal variables is bounded from below by local uncertainties and is strengthened differently for separable states and for each one-way unsteerable ones. The analysis of the minimal properly normalized sums of these variances yields necessary conditions of separability and EPR unsteerability of $(N\, \text{vs} \,1)$-mode states in both possible ways of steering. When the states and the performed measurements are Gaussian, then these conditions are precisely the previously-known criteria of separability and one-way unsteerability.