cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Probing unification scenarios with atomic clocks
Creators: name: Ferreira, M. C.
name: Julião, M. D.
name: Martins, C. J. A. P.
name: Monteiro, A. M. R. V. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We discuss the usage of measurements of the stability of nature's fundamental constants coming from comparisons between atomic clocks as a means to constrain coupled variations of these constants in a broad class of unification scenarios. After introducing the phenomenology of these models we provide updated constraints, based on a global analysis of the latest experimental results. We obtain null results for the proton-to-electron mass ratio ${\dotμ}/μ=(0.68\pm5.79)\ti mes10^{-16}\, {\rm yr}{}^{-1}$ and for the gyromagnetic factor ${\dot g_p}/{g_p} =(-0.72\pm0.89)\times10^{-16}\, {\rm yr}{}^{-1}$ (both of these being at the 95 % confidence level). These results are compatible with theoretical expectations on unification scenarios, but much freedom exists due to the presence of a degeneracy direction in the relevant parameter space.
description: 5 pages
Postselection-free controlled generation of a high-dimensional orbital-angular-momentum entangled state
Creators: name: Karan, Suman
name: Prasad, Radhika
name: Jha, Anand K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: High-dimensional entangled states in orbital angular momentum (OAM) basis offer several unique advantages for quantum information applications. However, for the optimal performance of a given application, one requires a generation technique for OAM entangled states that is completely postselection-free and fully controllable. Nonetheless, despite several efforts in the past, no such technique currently exists. In this article, we propose just such a technique and experimentally demonstrate postselection-free generation of up to about 150-dimensional OAM entangled states. We report the generation accuracy, which is a measure of the control, to be more than 98% for states with Gaussian and triangular OAM Schmidt spectra and up to 90% for the maximally-entangled OAM states, which have rectangular spectra.
description: Manuscript: 11 pages, 8 figures, 4 tables
Silica-Like Sequence of Anomalies in Core-Softened Systems
Creators: name: Fomin, Yu. D.
name: Tsiok, E. N.
name: Ryzhov, V. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In this paper we present a simulation study of density, structural and diffusion anomalies in core-softened system introduced in our previous publications. It is well-known, that with appropriate parametrization, core-softened systems are remarkable model liquids that exhibit anomalous properties observed in tetrahedral liquids such as silica and water. It is widely believed that core-softened potentials demonstrate the water-like sequence of anomalies. We show that with increasing the depth of the attractive part of the potential the order of the region of anomalous diffusion and the regions of density and structural anomalies is inverted and have the silica-like sequence. We also show that the slope of the Widom line is negative like in water.
description: 5 pages, 4 figures. arXiv admin note: text overlap with arXiv:1109.1647
title: A Socio-Economic Game as a Means of Stimulating Student Activity
Creators: name:  Alexey Mikhailovich, Kamenskiy
Publisher: name: TEM Journal
Year: 2019

description: The purpose of this paper is to study the issues of students’ self-management in the mass school, taking into account the formed motivation of students. Method applied comprises large-scale and long-term socio-economic modelling. The author proposes non-standard forms of stimulating children’s activity related to the economic and socio-political aspects regarding the implementation of school extracurricular educational program. The article reveals the role of the social partnership within educational organization, the possibility of using the educational potential of the city in increasing the effectiveness of the educational process applied in the mass secondary school. The proposed model bases on the interaction of students, teachers, and parents.
Divergent effects of laser irradiation on ensembles of nitrogen-vacancy centers in bulk and nano-diamonds: implications for biosensing
Creators: name: Olivares-Postigo, Domingo
name: Gorrini, Federico
name: Bitonto, Valeria
name: Ackermann, Johannes
name: Giri, Rakshyakar
name: Krueger, Anke
name: Bifone, Angelo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Ensembles of negatively charged nitrogen vacancy centers (NV-) in diamond have been proposed for sensing of magnetic fields and paramagnetic agents, and as a source of spin-order for the hyperpolarization of nuclei in magnetic resonance applications. To this end, strongly fluorescent nanodiamonds represent promising materials, with large surface areas and dense ensembles of NV-. However, surface effects tend to favor the less useful neutral form, the NV0 centers. Here, we study the fluorescence properties and optically detected magnetic resonance (ODMR) of NV- centers as a function of laser power in strongly fluorescent bulk diamond and in nanodiamonds obtained by nanomilling the native material. In bulk diamond, we find that increasing laser power increases ODMR contrast, consistent with a power-dependent increase in spin-polarization. Surprisingly, in nanodiamonds we observe a non-monotonic behavior, with a decrease in ODMR contrast at higher laser power that can be ascribed to more efficient NV- -> NV0 photoconversion in nanodiamonds compared to bulk diamond, resulting in depletion of the NV- pool. We also studied this phenomenon in cell cultures following internalization of NDs in macrophages. Our findings show that surface effects in nanodiamonds substantially affect the NV properties and provide indications for the adjustment of experimental parameters.
title: VILARITY - Virtual Laboratory for Information Security Practices
Creators: name: Syamsuddin, Irfan
Publisher: name: TEM Journal
Year: 2019

description: Availability of teaching aid for laboratory practices is important particularly in the field of information security. In this paper is introduced a novel Virtual Lab for Information Security practices called VILARITY. It is an on-going effort to establish alternative laboratory based on virtualization technology specifically designed for two security related courses. The paper at hand briefly presents assessment for VILARITY usage through two different surveys. The first survey aims to assess the effectiveness of contents of Virtual Lab whilst the second one is to find out any obstacles faced by students in using virtualization tool. In conclusion, most students consider hands on practices with the Virtual Lab have enhanced their skills and knowledge and the virtualization environment is appropriate for delivering the practices.

Keywords – Virtual lab, information security, virtualization, laboratory practices, evaluation.
Decay Rate of $\exp(A^{-1}t)A^{-1}$ on a Hilbert Space and the Crank-Nicolson Scheme with Smooth Initial Data
Creators: name: Wakaiki, Masashi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper is concerned with the decay rate of $e^{A^{-1}t}A^{-1}$ for the generator $A$ of an exponentially stable $C_0$-semigroup on a Hilbert space. To estimate the decay rate of $e^{A^{-1}t}A^{-1}$, we apply a bounded functional calculus. Using this estimate and Lyapunov equations, we also study the quantified asymptotic behavior of the Crank-Nicolson scheme with smooth initial data. A similar argument is applied to a polynomially stable $C_0$-semigroup whose generator is normal.
description: 17 pages. To appear in Integral Equations and Operator Theory
Multi-sensor Suboptimal Fusion Student's $t$ Filter
Creators: name: Li, Tiancheng
name: Hu, Zheng
name: Liu, Zhunga
name: Wang, Xiaoxu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A multi-sensor fusion Student's $t$ filter is proposed for time-series recursive estimation in the presence of heavy-tailed process and measurement noises. Driven from an information-theoretic optimization, the approach extends the single sensor Student's $t$ Kalman filter based on the suboptimal arithmetic average (AA) fusion approach. To ensure computationally efficient, closed-form $t$ density recursion, reasonable approximation has been used in both local-sensor filtering and inter-sensor fusion calculation. The overall framework accommodates any Gaussian-oriented fusion approach such as the covariance intersection (CI). Simulation demonstrates the effectiveness of the proposed multi-sensor AA fusion-based $t$ filter in dealing with outliers as compared with the classic Gaussian estimator, and the advantage of the AA fusion in comparison with the CI approach and the augmented measurement fusion.
description: 8 pages, 8 figures
title: Introducing Information Security Concepts and Standards in Higher Education
Creators: name: Orozova, Daniela
name: Kaloyanova, Kalinka
name: Todorova, Magdalina
Publisher: name: TEM Journal
Year: 2019

description: Information security deals with protecting data and information in all of its forms. The information security topic has been an area of growing research and educational interest for years. Many universities started to incorporate security concepts in new or existing courses, following the recommendations of the ISO/IEC 27000 series of standards. Recently, a new CSES2017 curricula in cyber-security education was introduced.
The article presents its authors’ experience in delivering education in information security area through courses in several Bulgarian universities. The main topics and educational methods, covered by the courses are presented and some results are discussed.

Keywords – Information security, ISO/IEC 27001, ISO/IEC 27002, Information Security Management System (ISMS), threat, risk analysis and assessment, Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS).
Physical Conditions of the Gas in an ALMA [CII]-identified Submillimetre Galaxy at z = 4.44
Creators: name: Huynh, M. T.
name: Norris, R. P.
name: Coppin, K. E. K.
name: Emonts, B. H. C.
name: Ivison, R. J.
name: Seymour, N.
name: Smail, Ian
name: Smolcic, V.
name: Swinbank, A. M.
name: Brandt, W. N.
name: Chapman, S. C.
name: Dannerbauer, H.
name: De Breuck, C.
name: Greve, T. R.
name: Hodge, J. A.
name: Karim, A.
name: Knudsen, K. K.
name: Menten, K. M.
name: van der Werf, P. P.
name: Walter, F.
name: Weiss, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present CO(2-1) observations of the submillimetre galaxy ALESS65.1 performed with the Australia Telescope Compact Array at 42.3 GHz. A previous ALMA study of submillimetre galaxies in the Extended Chandra Deep Field South detected [CII] 157.74 micron emission from this galaxy at a redshift of z = 4.44. No CO(2-1) emission was detected but we derive a firm upper limit to the cold gas mass in ALESS65.1 of M_gas < 1.7 x 10^10 M_odot. The estimated gas depletion timescale is <50 Myr, which is similar to other high redshift SMGs, and consistent with z > 4 SMGs being the likely progenitors of massive red-and-dead galaxies at z > 2. The ratio of the [CII], CO and far-infrared luminosities implies a strong far-ultraviolet field of G_0 > 10^3, as seen in Galactic star forming regions or local ULIRGs. The observed L_[CII]/L_FIR = 2.3 x 10^{-3} is high compared to local ULIRGs and, combined with L_[CII]/L_CO > 2700, it is consistent with ALESS65.1 either having an extended (several kpc) [CII] emitting region or lower than solar metallicity.
description: 6 pages, 2 figures, accepted by MNRAS
Nuclear Shell Structure in a Finite-Temperature Relativistic Framework
Creators: name: Wibowo, Herlik
name: Litvinova, Elena
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Other Condensed Matter (cond-mat.other)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The shell evolution of neutron-rich nuclei with temperature is studied in a beyond-mean-field framework rooted in the meson-nucleon Lagrangian. The temperature-dependent Dyson equation with the dynamical kernel taking into account the particle-vibration coupling (PVC) is solved for the fermionic propagators in the basis of the thermal relativistic mean-field Dirac spinors. The calculations are performed for $^{68-78}$Ni in a broad range of temperatures $0 \leq T \leq 4$ MeV. The special focus is put on the fragmentation pattern of the single-particle states, which is further investigated within toy models in strongly truncated model spaces. Such models allow for quantifying the sensitivity of the fragmentation to the phonon frequencies, the PVC strength and to the mean-field level density. The model studies provide insights into the temperature evolution of the PVC mechanism in real nuclear systems under the conditions which may occur in astrophysical environments.
description: Article: 17 pages, 19 figures
Dynamical realizations of l-conformal Newton-Hooke group
Creators: name: Galajinsky, Anton
name: Masterov, Ivan
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The method of nonlinear realizations and the technique previously developed in arXiv:1208.1403 are used to construct a dynamical system without higher derivative terms, which holds invariant under the l-conformal Newton-Hooke group. A configuration space of the model involves coordinates, which parametrize a particle moving in d spatial dimensions and a conformal mode, which gives rise to an effective external field.The dynamical system describes a generalized multi-dimensional oscillator, which undergoes accelerated/decelerated motion in an ellipse in accord with evolution of the conformal mode. Higher derivative formulations are discussed as well. It is demonstrated that the multi-dimensional Pais-Uhlenbeck oscillator enjoys the l=3/2-conformal Newton-Hooke symmetry for a particular choice of its frequencies.
description: 12 pages
Gaia May Detect Hundreds of Well-characterised Stellar Black Holes
Creators: name: Chawla, Chirag
name: Chatterjee, Sourav
name: Breivik, Katelyn
name: Moorthy, Chaithanya Krishna
name: Andrews, Jeff J.
name: Sanderson, Robyn E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Detection of black holes (BHs) with detached luminous companions (LCs) can be instrumental in connecting the BH properties with their progenitors' since the latter can be inferred from the observable properties of the LC. Past studies showed the promise of Gaia astrometry in detecting BH-LC binaries. We build upon these studies by: 1) initialising the zero-age binary properties based on realistic, metallicity-dependent star-formation history in the Milky Way (MW), 2) evolving these binaries to current epoch to generate realistic MW populations of BH-LC binaries, 3) distributing these binaries in the MW preserving the complex age-metallicity-Galactic position correlations, 4) accounting for extinction and reddening using three-dimensional dust maps, 5) examining the extended Gaia mission's ability to resolve BH-LC binaries. We restrict ourselves to detached BH-LC binaries with orbital period <10 yr such that Gaia can observe at least one full orbit. We find: 1) the extended Gaia mission can astrometrically resolve 30-300 detached BH-LC binaries depending on our assumptions of supernova physics and astrometric detection threshold; 2) Gaia's astrometry alone can indicate BH candidates for 10-100 BH-LC binaries by constraining the dark primary mass >3 Msun; 3) distributions of observables including orbital periods, eccentricities, and component masses are sensitive to the adopted binary evolution model, hence can directly inform binary evolution models. Finally, we comment on the potential to further characterise these BH binaries through radial velocity measurements and observation of X-ray counterparts.
description: 26 pages, 18 figures, and 1 table; accepted for publication in The Astrophysical Journal
Indication for an intermediate-mass black hole in the globular cluster NGC 5286 from kinematics
Creators: name: Feldmeier, A.
name: Lützgendorf, N.
name: Neumayer, N.
name: Kissler-Patig, M.
name: Gebhardt, K.
name: Baumgardt, H.
name: Noyola, E.
name: de Zeeuw, P. T.
name: Jalali, B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Intermediate-mass black holes (IMBHs, 10^2-10^5 M_sun) fill the gap between stellar-mass black holes and supermassive black holes (SMBHs). Simulations have shown that IMBHs may form in dense star clusters, and therefore may still be present in these smaller stellar systems. We investigate the Galactic globular cluster NGC 5286 for indications of a central IMBH using spectroscopic data from VLT/FLAMES, velocity measurements from the Rutgers Fabry Perot at CTIO, and photometric data from HST. We run analytic spherical and axisymmetric Jeans models with different central black-hole masses, anisotropy, mass-to-light ratio, and inclination. Further, we compare the data to a grid of N-body simulations without tidal field. Additionally, we use one N-body simulation to check the results of the spherical Jeans models for the total cluster mass. Both the Jeans models and the N-body simulations favor the presence of a central black hole in NGC 5286 and our detection is at the 1- to 1.5-sigma level. From the spherical Jeans models we obtain a best fit with black-hole mass M_BH=(1.5+-1.0)x10^3 M_sun. The error is the 68% confidence limit from Monte Carlo simulations. Axisymmetric models give a consistent result. The best fitting N-body model is found with a black hole of 0.9% of the total cluster mass (4.38+-0.18)x10^5 M_sun, which results in an IMBH mass of M_BH=(3.9+-2.0)x10^3 M_sun. Jeans models give lower values for the total cluster mass. Our test of the Jeans models with N-body simulation data shows that this discrepancy has two reasons: The influence of a radially varying M/L profile, and underestimation of the velocity dispersion as the measurements are limited to bright stars. We conclude that detection of IMBHs in Galactic globular clusters remains a challenging task unless their mass fractions are above those found for SMBHs in nearby galaxies. [abridged]
description: 16 pages, 14 figures, Accepted for publication in A&A
title: Automated Strategic Management Batch Accounting in a Processing Industry
Creators: name: Vladimirovna Galautdinova, Victoriya
Publisher: name: TEM Journal
Year: 2019

description: This paper examines managerial, technological, and organizational development aspects of strategic management accounting and analysis in a processing enterprise. The purpose of this research is to perform comprehensive methodological integration of strategic management accounting in a milk processing enterprise in order to increase its efficiency and competitiveness. This can be accomplished by using analytical information sources, and by developing a single list of options for operations in management accounting. The author has developed and implemented the concept of an automated management reporting system, and revealed that planning and achieving financial results within a branch structure implies a plan-factual analysis of both the branch itself and the entire company.

Keywords – Automated management accounting, Production automation, Enterprise digitization, Analytical information database.
Analytic expansions of multi-hadron finite-volume energies: I. Two-particle states
Creators: name: Grabowska, Dorota M.
name: Hansen, Maxwell T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We derive analytic expansions for the finite-volume energies of weakly-interacting two-particle systems, using the general relations between scattering amplitudes and energies derived by Lüscher and others. The relations hold for ground and excited states with both zero and non-zero total momentum in the finite-volume frame. A number of instructive aspects arise in the derivation, including the role of accidental degeneracies and the importance of defining a power-counting scheme in the expansions. The results give intuition concerning the imprint of weakly-interacting systems on the energy spectrum, while also providing a useful basis for the analogous results concerning three-particle excited states, to appear.
description: 34 pages, 2 figures, 9 tables, CERN-TH-2021-133
Reaction-diffusion on a time-dependent interval: refining the notion of 'critical length'
Creators: name: Allwright, Jane
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: A reaction-diffusion equation is studied in a time-dependent interval whose length varies with time. The reaction term is either linear or of KPP type. On a fixed interval, it is well-known that if the length is less than a certain critical value then the solution tends to zero. When the domain length may vary with time, we prove conditions under which the solution does and does not converge to zero in long time. We show that, even with the length always strictly less than the 'critical length', either outcome may occur. Examples are given. The proof is based on upper and lower estimates for the solution, which are derived in this paper for a general time-dependent interval.
title: Educational, Engineering and Medicine Personnel: The Impact of Deviant Patterns on  Image and Business
Creators: name:  Vasilyevna Maysak, Nadezhda
name:  Aleksandrovna Volkova, Elena
name:  Vladimirovna Mashchenko, Maya
name:  Albertovich Magsumov, Timur
name: Pavel Pavlovich, Khoroshikh
Publisher: name: TEM Journal
Year: 2019

description: Based on the empirical study conducted using the Khitrova “Business Situations” test, which is a modification of the Rosenzweig drawing association test, the features of frustration reactions were revealed. The comparative empirical study including 310 teachers, doctors, and engineers from Astrakhan city institutions (Russia) was conducted. The revealed trends of teachers and doctors made it possible to describe the image of a typical modern representative of the socionomic profession. The results will form the basis for training courses regarding specialists, in effective behavioural strategies in frustrative situations with the goal, which comprises changing unproductive strategies and frustration reactions in business.

Keywords – “Business situation” test, Deviant behaviour patterns, Educational Personnel, Professional management.
Reduction of ion back flow using a quadruple GEM detector with various gas mixtures
Creators: name: Tarafdar, Sourav
name: Greene, Senta V.
name: Velkovska, Julia
name: Blankenship, Brandon
name: Reynolds, Michael Z.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: In gaseous tracking detectors with a large gaseous volume multiple layers of Gas Electron Multipliers (GEM) can be used to block positive ions from flowing back into the active volume, which is detrimental to the tracking performance. We report on studies of effective gain, ion backflow (IBF), and energy resolution in quadruple GEM detectors, and on strategies for minimizing IBF by optimizing the operating voltages of the individual GEM layers and the potential differences between different layers.
description: 14 pages, 11 figures, 4 tables
title: Nils Åberg, Bronzezeitliche und früheisenzeitliche Chronologie, Teil III, Kupfer- und Frühbronzezeit
Creators: name: Reinecke, Paul
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Nils Åberg, Bronzezeitliche und früheisenzeitliche Chronologie, Teil III, Kupfer- und Frühbronzezeit. Stockholm 1932, im Verlag der Kungl. Vitterhets Historie och Antikvitets Akademie. 163 S. und 302 Abb. im Text.
Allium fallax Buser
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: A. fallax Buser Cat. 113. l: ColdeBalme (J.). - 3:LesEtablons (Besse);Saastal:Grund-Fee (Buser), Almagell-Zermeiggern (A. Keller).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Surface and electronic structure at atomic length scales of the non-symmorphic antiferromagnet Eu$_5$In$_2$Sb$_6$
Creators: name: Crivillero, M. Victoria Ale
name: Rößler, Sahana
name: Rosa, Priscila F. S.
name: Müller, J.
name: Rößler, U. K.
name: Wirth, S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We performed Scanning Tunneling Microscopy and Spectroscopy (STM/STS) measurements to investigate the Zintl phase Eu$_5$In$_2$Sb$_6$, a non-symmorphic antiferromagnet. The theoretical prediction of a non-trivial Fermi surface topology stabilized by the non-symmorphic symmetry motivated our research. On the cleaved (010) plane, we obtained striped patterns that can be correlated to the stacking of the [In$_2$Sb$_6$]$^{10-}$ double chains along the crystallographic $c$ axis. The attempted cleavage along the $a$ axis revealed a more complex pattern. We combined the STS measurement on non-reconstructed (010) and (081) surfaces with DFT calculations to further elucidate the electronic structure of Eu$_5$In$_2$Sb$_6$. From our investigations so far, direct experimental evidence of the predicted topological surface states remains elusive.
On subspace designs
Creators: name: Santonastaso, Paolo
name: Zullo, Ferdinando
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: Primary 51E23, 94B05. Secondary 51E22, 05B99

description: Guruswami and Xing introduced subspace designs in 2013 to give the first construction of positive rate rank metric codes list-decodable beyond half the distance. In this paper we provide bounds involving the parameters of a subspace design, showing they are tight via explicit constructions. We point out a connection with sum-rank metric codes, dealing with optimal codes and minimal codes with respect to this metric. Applications to two-intersection sets with respect to hyperplanes, two-weight codes, cutting blocking sets and lossless dimension expanders are also provided.
Voids and Halos in Voids statistics as a probe of the Expansion History of the Universe
Creators: name: Parkavousi, Laya
name: Kameli, Hamed
name: Baghram, Shant
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Structures in the Universe are arranged into the cosmic web. Distributions, statistics, and evolutions of the structures can be used as probes for cosmological models. We investigate the number density of voids and dark matter halos-in-voids in the Excursion Set Theory (EST). We study the Markov and non-Markov frameworks of EST in both spherical and ellipsoidal collapse models. Afterward, we compare the number density of voids and halos-in-voids in the standard $Λ$CDM and the reconstructed model. The reconstructed model is a model-independent reconstruction based on background observations. This work explores the effects of the collapse model barrier in the different EST frameworks on the statistics of voids and the statistics of halos-in-voids. Finally, we find the hint that cosmological models can be distinguished by the number density of halos-in-voids in the $1.0-2.5$ redshift range. The maximum difference is observed in $z\sim1.9$.
description: 11 pages, 10 figures. Final Version. Accepted for publication in MNRAS
The crossing multiplier for solvable lattice models
Creators: name: Belavin, Vladimir
name: Gepner, Doron
name: Cabezas, J. Ramos
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the large class of solvable lattice models, based on the data of conformal field theory. These models are constructed from any conformal field theory. We consider the lattice models based on affine algebras described by Jimbo et al., for the algebras $ABCD$ and by Kuniba et al. for $G_2$. We find a general formula for the crossing multipliers of these models. It is shown that these crossing multipliers are also given by the principally specialized characters of the model in question. Therefore we conjecture that the crossing multipliers in this large class of solvable interaction round the face lattice models are given by the characters of the conformal field theory on which they are based. We use this result to study the local state probabilities of these models and show that they are given by the branching rule, in regime III.
description: 17 pages, no figures. Major revision. Added an appendix for the proof for WZW models of the character formula
Effects of pairing gap and band gap on superfluid density in the inner crust of neutron stars
Creators: name: Minami, Yuki
name: Watanabe, Gentaro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Calculations of the superfluid density in the inner crust of neutron stars by different approaches are in strong disagreement, which causes a debate on the accountability of pulsar glitches based on superfluidity. Taking a simple unified model, we study the dependence on approximation of the superfluid density in a periodic potential. In comparison with the Hartree-Fock-Bogoliubov (HF-Bogoliubov) theory which treats the effects of the band gap and the pairing gap on equal footing, we examine the HF-BCS-type approximation in which the former is incorporated in priority, and another approximation in which the latter is incorporated in priority. We find that, when the pairing gap and the band gap are comparable as in the inner crust of neutron stars, they need to be treated on equal footing, and the HF-BCS approximation can considerably underestimate the superfluid density even if the pairing gap is much smaller than the Fermi energy. Our result suggests that the validity of the HF-BCS approximation for evaluating the superfluid density in neutron star crusts is questionable.
description: 9 pages, 4 figures. accepted version in Physical Review Research
The fixed point iteration of positive concave mappings converges geometrically if a fixed point exists: implications to wireless systems
Creators: name: Piotrowski, Tomasz
name: Cavalcante, Renato L. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We prove that the fixed point iteration of arbitrary positive concave mappings with nonempty fixed point set converges geometrically for any starting point. We also show that positivity is crucial for this result to hold, and the concept of (nonlinear) spectral radius of asymptotic mappings provides us with information about the convergence factor. As a practical implication of the results shown here, we rigorously explain why some power control and load estimation algorithms in wireless networks, which are particular instances of the fixed point iteration, have shown geometric convergence in simulations. These algorithms have been typically derived by considering fixed point iterations of the general class of standard interference mappings, so the possibility of sublinear convergence rate could not be ruled out in previous studies, except in special cases that are often more restrictive than those considered here.
description: Accepted in IEEE Transactions on Signal Processing
title: Herman Wirth und die deutsche Wissenschaft
Creators: name: Sprockhoff, Ernst
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Herman Wirth und die deutsche Wissenschaft. Unter Mitwirkung von F. Bork (Königsberg), H. Plischke (Göttingen), B. K. Schultz (München), L. Wolff (Göttingen), herausgegeben von F. Wiegers (Berlin). J. F. Lehmanns Verlag, München 1932. 69 Seiten.
A quasi-continuous exhaust scenario for a fusion reactor: the renaissance of small edge localized modes
Creators: name: Harrer, G. F.
name: Faitsch, M.
name: Radovanovic, L.
name: Wolfrum, E.
name: Albert, C.
name: Cathey, A.
name: Cavedon, M.
name: Dunne, M.
name: Eich, T.
name: Fischer, R.
name: Hoelzl, M.
name: Labit, B.
name: Meyer, H.
name: Aumayr, F.
name: Team, the ASDEX Upgrade
name: Team, the EUROfusion MST1
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Tokamak operational regimes with small edge localized modes (ELMs) could be a solution to the problem of large transient heat loads in future fusion reactors because they provide quasi-continuous exhaust while keeping a good plasma confinement. A ballooning mode mechanism near the last closed flux surface (LCFS) governed by an interplay of the pressure gradient and the magnetic shear there has been proposed for small ELMs in high density ASDEX Upgrade and TCV discharges. In this manuscript we explore different factors relevant for plasma edge stability in a wide range of edge safety factors by changing the connection length between the good and the bad curvature side. Simultaneously this influences the stabilizing effect of the local magnetic shear close to the LCFS as well as the $E \times B$ flow shear. Ideal ballooning stability calculations with the HELENA code reveal that small ELM plasmas are indeed unstable against ballooning modes very close to the LCFS but can exhibit second ballooning stability in the steep gradient region which correlates with enhanced confinement. We also present first non-linear simulations of small ELM regimes with the JOREK code including the $E \times B$ shear which indeed develop ballooning like fluctuations in the high triangularity limit. In the region where the small ELMs originate the dimensionless parameters are very similar in our investigated discharges and in a reactor, making this regime the ideal exhaust scenario for a future reactor.
Performance of a Remotely Located Muon Radiography System to Identify the Inner Structure of a Nuclear Plant
Creators: name: Fujii, H.
name: Hara, K.
name: Hashimoto, S.
name: Ito, F.
name: Kakuno, H.
name: Kim, S. H.
name: Kochiyama, M.
name: Nagamine, K.
name: Suzuki, A.
name: Takada, Y.
name: Takahashi, Y.
name: Takasaki, F.
name: Yamashita, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The performance of a muon radiography system designed to image the inner structure of a nuclear plant located at a distance of 64 m was evaluated. We concluded absence of the fuel in the pressure vessel during the measurement period and succeeded in profiling the fuel material placed in the storage pool. The obtained data also demonstrated the sensitivity of the system to water level changes in the reactor well and the dryer-separator pool. It is expected that the system could reconstruct a 2 m cubic fuel object easily. By operating multiple systems, typically four identical systems, viewing the reactor from different directions simultaneously, detection of a 1 m cubic object should also be achievable within a few month period.
description: * hara@hep.px.tsukuba.ac.jp; accepted for publication in Progress of Theoretical and Experimental Physics
Frequency-dependent Ultrasonic Stimulation of PNIPAM Microgels in Water
Creators: name: Razavi, Atieh
name: Rutsch, Matthias
name: Wismath, Sonja
name: Kupnik, Mario
name: von Klitzing, Regine
name: Rahimzadeh, Amin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: As a novel stimulus, we used high-frequency ultrasonic waves to provide the required energy for breaking hydrogen bonds between Poly(N-isopropylacrylamide) (PNIPAM) and water molecules while the solution temperature maintains below the volume phase transition temperature (VPTT=$$32^\circ C$$). Ultrasonic waves propagate through the solution and their energy will be absorbed due to the liquid viscosity. The absorbed energy partially leads to the generation of a streaming flow and the rest will be spent to break the hydrogen bonds. Therefore, the microgels collapse and become insoluble in the water and agglomerate, resulting in turbidity. We used turbidity to quantify the ultrasound energy absorption and showed that the acousto-response of PNIPAM microgels is a temporal phenomenon that depends on the duration of the actuation. Increasing the solution concentration leads to a faster hydrogen bond breakage and turbidity evolution. Furthermore, the frequency of imposed waves is important and affects the stimulation kinetics of PNIPAM microgels. Increasing the frequency of actuation increases the speed of hydrogen bond breakage and thus turbidity evolution. This is due to the increase in ultrasound energy absorption by liquids at higher frequencies.
Extremely brilliant crystal-based light sources
Creators: name: Sushko, Gennady B.
name: Korol, Andrei V.
name: Solov'yov, Andrey V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Atomic Physics (physics.atom-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Brilliance of novel gamma-ray Crystal-based Light Sources (CLS) that can be constructed through exposure of oriented crystals to beams of ultra-relativistic charged particles is calculated basing on the atomistic scale numerical modeling of the channeling process. In an exemplary case study, the brilliance of radiation emitted in a diamond-based Crystalline Undulator LS by a 10 GeV positron beam available at present at the SLAC facility is computed. Intesity of CU radiation in the photon energy range 10^0 - 10^1 MeV, which is inaccessible to conventional synchrotrons, undulators and XFELs, greatly exceeds that of laser-Compton scattering LSs and can be higher than predicted in the Gamma Factory proposal to CERN. Construction of novel CLSs is a challenging task which constitutes a highly interdisciplinary field entangling a broad range of correlated activities. CLSs provide a low-cost altenative to conventional LSs and have enomorous number of applications.
description: 6 pages, 4 figures plus Supplementary Material with 2 figures
title: Decision making of the Winner of the National Student Creativity Program in Designing ICT-based Learning Media
Creators: name: Murtafiah, Wasilatul
name: Sa’dijah, Cholis
name: Daniel Chandra, Tjang
name: Susiswo, Susiswo
Publisher: name: TEM Journal
Year: 2019

description: This case study investigated the decision making process of the winners of the national competition for student creativity programs in designing ICT-based mathematics learning media. The results are revealed based on the decision-making stages: (1) generating ideas, subject designed ICT-based learning media by combining student worksheets with GeoGebra, (2) clarifying ideas, subject consider the systematics design of ICT-based learning media based on the condition of students and student learning outcomes, (3) assessing the fairness of ideas, subject believed that the validity, practicality and effectiveness aspects of ICT-based learning media designed were appropriate to attract students interest and motivation.

Keywords – Decision making, Prospective mathematics teacher student, ICT, Learning Media, GeoGebra.
On the Analytic Properties of the Standard $L$-Function Attached to Siegel-Jacobi Modular Forms
Creators: name: Bouganis, Thanasis
name: Marzec, Jolanta
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2019

description: In this work we study the analytic properties of the standard $L$-function attached to Siegel-Jacobi modular forms of higher index, generalizing previous results of Arakawa and Murase. Moreover, we obtain results on the analytic properties of Klingen-type Eisenstein series attached to Jacobi groups.
description: DOCUMENTA MATHEMATICA, Vol 24 (2019), p. 2613-2684
title: Toward a Learning Analytics System in Bulgarian Higher Education Institutions
Creators: name: Gaftandzhieva, Silvia
name: Doneva, Rositsa
Publisher: name: TEM Journal
Year: 2019

description: The paper presents a study in the area of Learning Analytics – a scientific field that is still in a relatively early stage of study in Bulgaria. The study aims to offer, develop and test software tools for Learning Analytics that will improve the learning outcomes in the field of higher education. Using data mining methods for analysis the data produced in the learning process (extracted from different data sources), intelligent software tools will be developed to improve the quality of outcomes in different elements of the learning process (learning, teaching, monitoring, etc.), and for the needs of different stakeholder groups.

Keywords – Higher Education, University Information Systems, Data Extraction, Intelligence Systems, Learning Analytics.
Debiased Contrastive Learning for Sequential Recommendation
Creators: name: Yang, Yuhao
name: Huang, Chao
name: Xia, Lianghao
name: Huang, Chunzhen
name: Luo, Da
name: Lin, Kangyi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Current sequential recommender systems are proposed to tackle the dynamic user preference learning with various neural techniques, such as Transformer and Graph Neural Networks (GNNs). However, inference from the highly sparse user behavior data may hinder the representation ability of sequential pattern encoding. To address the label shortage issue, contrastive learning (CL) methods are proposed recently to perform data augmentation in two fashions: (i) randomly corrupting the sequence data (e.g. stochastic masking, reordering); (ii) aligning representations across pre-defined contrastive views. Although effective, we argue that current CL-based methods have limitations in addressing popularity bias and disentangling of user conformity and real interest. In this paper, we propose a new Debiased Contrastive learning paradigm for Recommendation (DCRec) that unifies sequential pattern encoding with global collaborative relation modeling through adaptive conformity-aware augmentation. This solution is designed to tackle the popularity bias issue in recommendation systems. Our debiased contrastive learning framework effectively captures both the patterns of item transitions within sequences and the dependencies between users across sequences. Our experiments on various real-world datasets have demonstrated that DCRec significantly outperforms state-of-the-art baselines, indicating its efficacy for recommendation. To facilitate reproducibility of our results, we make our implementation of DCRec publicly available at: https://github.com/HKUDS/DCRec.
description: This paper is accepted by WWW'2023
title: Teacher Competences Development - a Guarantee of Sustainable High Level of  Education and Training
Creators: name: Zdenka, Gadušová
name: Viera, Jakubovská
name: Dagmar, Markechová
name: Anna, Tirpáková
Publisher: name: TEM Journal
Year: 2019

description: Constantine the Philosopher University in Nitra has long been involved in pre-service and in-service teacher training, and for several decades has had a range of research activities aimed at educating teachers and developing their competences. Currently the team of its researchers tackles the APVV-14-0446 project which focuses on the assessment of teachers' competences and the range of importance of which was experimentally tested. The collected data were analyzed using non-parametric statistical method. In the article, the authors present and discuss their findings.
Status of $Y=0$ Triplet Higgs with supersymmetry in the light of $\sim 125$ GeV Higgs discovery
Creators: name: Bandyopadhyay, Priyotosh
name: Huitu, Katri
name: Sabanci, Asli
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the $Y=0$ triplet extended supersymmetric model in the light of the recent Higgs boson discovery. We calculate full one loop Higgs mass spectrum in this model where the possible doublet-triplet mixing is considered in the charged Higgs sector. This mixing changes the prediction of $\mathcal{B}r(B_s\to X_s γ)$ in this model, compared to the MSSM. The constraints from the $\sim 125$ GeV Higgs along with $\mathcal{B}r(B_s\to X_s γ)$ are incorporated to find out the allowed parameter space. The lower bounds on the third generation squark masses coming from 125 GeV Higgs are rather week in this scenario compared to most constrained supersymmetric scenarios, e.g. a 200 GeV squark mass is still possible.
description: 25 pages, 32 figures, JHEP style
Fast Asymptotic-Numerical Method For Coarse Mesh Particle Simulation In Channels Of Arbitrary Cross Section
Creators: name: Christensen, Samuel
name: Chu, Raymond
name: Anderson, Christopher R
name: Roper, Marcus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Particles traveling through inertial microfluidic devices migrate to focusing streamlines. We present a numerical method that calculates migration velocities of particles in inertial microfluidic channels of arbitrary cross section by representing particles by singularities. Refinements to asymptotic analysis are given that improve the regularity of the singularity approximation, making finite element approximations of flow and pressure fields more effective. Sample results demonstrate that the method is computationally efficient and able to capture bifurcations in particle focusing positions due to changes in channel shape and Reynolds number.