cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the universality of supersonic turbulence
Creators: name: Federrath, Christoph
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Compressible turbulence shapes the structure of the interstellar medium of our Galaxy and likely plays an important role also during structure formation in the early Universe. The density PDF and the power spectrum of such compressible, supersonic turbulence are the key ingredients for theories of star formation. However, both the PDF and the spectrum are still a matter of debate, because theoretical predictions are limited and simulations of supersonic turbulence require enormous resolutions to capture the inertial-range scaling. To advance our limited knowledge of compressible turbulence, we here present and analyse the world's largest simulations of supersonic turbulence. We compare hydrodynamic models with numerical resolutions of 256^3-4096^3 mesh points and with two distinct driving mechanisms, solenoidal (divergence-free) driving and compressive (curl-free) driving. We find convergence of the density PDF, with compressive driving exhibiting a much wider and more intermittent density distribution than solenoidal driving. Analysing the power spectrum of the turbulence, we find a pure velocity scaling close to Burgers turbulence with P(v) k^(-2) for both driving modes in our hydrodynamical simulations with Mach = 17. The spectrum of the density-weighted velocity rho^(1/3)v, however, does not provide the previously suggested universal scaling for supersonic turbulence. We find that the power spectrum P(rho^(1/3)v) scales with wavenumber as k^(-1.74) for solenoidal driving, close to incompressible Kolmogorov turbulence, k^(-5/3), but is significantly steeper with k^(-2.10) for compressive driving. We show that this is consistent with a recent theoretical model for compressible turbulence that predicts P(rho^(1/3)v) k^(-19/9) in the presence of a strong div(v) component as is produced by compressive driving and remains remarkably constant throughout the supersonic turbulent cascade.
description: 14 pages, 9 figures, published in MNRAS, "The world's largest supersonic turbulence simulations" with resolutions of 4096^3 grid cells; movies available: http://www.ita.uni-heidelberg.de/~chfeder/pubs/supersonic/supersonic.shtml?lang=en
Особливості визначення та опису соціально-демографічних характеристик у соціальних комунікаціях
Creators: name: Fedushko, Solomia
Publisher: name: figshare
Year: 2019
Subjects: subject: 80709 Social and Community Informatics
subject: FOS: Media and communications
subject: Information Systems
subject: FOS: Computer and information sciences
subject: 150302 Business Information Systems
subject: FOS: Economics and business
subject: 80609 Information Systems Management
subject: 80505 Web Technologies (excl. Web Search)
subject: 80612 Interorganisational Information Systems and Web Services

description: This paper deals with the definition and description of socio-demographic characteristics in social communication. Socio-demographic profile of Web community members based on socio-demographic characteristics is established.
Model operator approach to the Lamb shift calculations in relativistic many-electron atoms
Creators: name: Shabaev, V. M.
name: Tupitsyn, I. I.
name: Yerokhin, V. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A model operator approach to calculations of the QED corrections to energy levels in relativistic many-electron atomic systems is developed. The model Lamb shift operator is represented by a sum of local and nonlocal potentials which are defined using the results of ab initio calculations of the diagonal and nondiagonal matrix elements of the one-loop QED operator with H-like wave functions. The model operator can be easily included in any calculations based on the Dirac-Coulomb-Breit Hamiltonian. Efficiency of the method is demonstrated by comparison of the model QED operator results for the Lamb shifts in many-electron atoms and ions with exact QED calculations.
description: 14 pages, 10 tables, 3 figures
Effective Strategies for Using Hashtags in Online Communication
Creators: name: Fedushko, Solomia
name: Kolos, Sofia
Publisher: name: figshare
Year: 2019
Subjects: subject: 100503 Computer Communications Networks
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 200102 Communication Technology and Digital Media Studies
subject: FOS: Media and communications
subject: 80709 Social and Community Informatics
subject: 80503 Networking and Communications
subject: FOS: Computer and information sciences

description: The features of use of hashtags among students of Lviv were investigated. The list of optimal strategies for using these communicative tools for personal branding is determined. The effective strategy for using hashtags in online communication for the personal and company branding is considered. The results of calculation of effectiveness of hashtags related to #education is calculated. The reports of using hashtag #education in social networks is presented.
The cataloging of virtual communities of educational thematic
Creators: name: Fedushko, Solomia
Publisher: name: figshare
Year: 2015
Subjects: subject: Computer Engineering
subject: Education
subject: 130101 Continuing and Community Education
subject: FOS: Educational sciences
subject: 130103 Higher Education
subject: 80505 Web Technologies (excl. Web Search)
subject: FOS: Computer and information sciences
subject: 80704 Information Retrieval and Web Search
subject: FOS: Media and communications
subject: 80612 Interorganisational Information Systems and Web Services
subject: 80602 Computer-Human Interaction
subject: FOS: Psychology

description: This article considers the current problem of investigation the specific of specialized catalog of educational virtual communities. Peculiarities of catalogs of virtual communities are formed. This study provides a method of organization of catalog of virtual communities of educational direction. This method is based on a formal model of virtual communities as an environment of information activity of the higher educational institutions. The result of the research is the method of socio-demographic characteristics identification of virtual communities' members. The formal models of internet-resources as an object of information activities mostly carried out in researches of internet-catalogs construction are formed. Thus, the primary task of this work is to develop the method of cataloging of virtual communities of educational direction and development of architecture and methods of organization of such catalog.
Statistical Methods of Virtual Community Users Age Verification
Creators: name: Fedushko, Solomia
Publisher: name: figshare
Year: 2015
Subjects: subject: Computer Engineering
subject: 80309 Software Engineering
subject: FOS: Computer and information sciences
subject: 80704 Information Retrieval and Web Search
subject: FOS: Media and communications
subject: 80505 Web Technologies (excl. Web Search)
subject: 80612 Interorganisational Information Systems and Web Services
subject: Statistics
subject: FOS: Mathematics
subject: 10401 Applied Statistics
subject: 80604 Database Management

description: In the article the statistical methods of web-users age verification are investigated and developed by mean of computerlinguistic analysis of virtual community user’s information tracks. The issue of personal data verification of virtual community user’s accounts is important to web-community administrators. The aim of this method is substantially effects on the efficiency of virtual communities functioning and improving the registration and moderating processes in the virtual community. The set of age indicative features of virtual community users is formed for the age verification of web-users. The age indicative characteristics based on the socio-demographic markers set up by experts. Statistical methods in the learning sample of virtual community users of two Ukrainian web-forums (Lviv. Forum Ridne Misto and Rock.Lviv.Ua) are presented. The computerlinguistic method of socio-demographic characteristics age-validation in social communications is developed.
On regular G-grading
Creators: name: Aljadeff, Eli
name: David, Ofir
Publisher: name: arXiv
Year: 2012
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16R99, 16W50

description: Let A be an associative algebra over an algebraically closed field F of characteristic zero and let G be a finite abelian group. Regev and Seeman introduced the notion of a regular G-grading on A, namely a grading A= Σ_{g in G} A_g that satisfies the following two conditions: (1) for every integer n>=1 and every n-tuple (g_1,g_2,...,g_n) in G^n, there are elements, a_i in A_{g_i}, i=1,...,n, such that a_1*a_2*...*a_n != 0. (2) for every g,h in G and for every a_g in A_g,b_h in A_h, we have a_{g}b_{h}=theta(g,h)b_{h}a_{g}. Then later, Bahturin and Regev conjectured that if the grading on A is regular and minimal, then the order of the group G is an invariant of the algebra. In this article we prove the conjecture by showing that ord(G) coincides with an invariant of A which appears in PI theory, namely exp(A) (the exponent of A). Moreover, we extend the whole theory to (finite) nonabelian groups and show that the above result holds also in that case.
description: 27 pages
title: Interpretation of local scouring at bridge piers and abutments with the phenomenological theory of turbulence
Creators: name: Coscarella, Francesco
name: Furgiuele, Franco
name: Gaudio, Roberto
name: Manes, Costantino
Publisher: name: Università della Calabria
Year: 2019

description: Dottorato di Ricerca in Ingegneria Civile e Industriale. Ciclo XXXI
Monmouth University Poll: August 2019 Democratic Caucus Iowa
Creators: name: Monmouth University Polling Institute
Publisher: name: Roper Center for Public Opinion Research
Year: 2022

description: Support for Democratic candidates (24); favorability of Democratic presidential candidates (11); most important issue for Democratic 2020 presidential support (3); views on healthcare policy (2); electability of Democratic candidates over Donald Trump (2); important issues in Democratic presidential nomination support (1); past presidential caucus attendance (1).
Structure of the Large Magellanic Cloud from the Near Infrared magnitudes of Red Clump stars
Creators: name: Subramanian, Smitha
name: Subramaniam, Annapurni
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The structural parameters, like the inclination, i and the position angle of the line of nodes (PA_lon) of the disk of the Large Magellanic Cloud (LMC) are estimated using the JH photometric data of red clump stars from the Infrared Survey Facility - Magellanic Cloud Point Source Catalog (IRSF-MCPSC). The observed LMC region is divided into several sub-regions and stars in each region are cross identified with the optically identified red clump stars to obtain the near infrared magnitudes. The peak values of H magnitude and (J-H) colour of the observed red clump distribution are obtained by fitting a profile to the distributions and also by taking the average value of magnitude and colour of the red clump stars in the bin with largest number. Then the dereddened peak H0 magnitude of the red clump stars in each sub-region is obtained. The RA, Dec and relative distance from the center of each sub-region are converted into x, y & z Cartesian coordinates. A weighted least square plane fitting method is applied to this x,y,z data to estimate the structural parameters of the LMC disk. A reddening map based on (J-H) colour of the RC stars is presented. When the peaks of the red clump distribution were identified by averaging, an inclination of 25.7 +/- 1.6 and PA_lon = 141.5 +/- 4.5 were obtained. We estimate a distance modulus of 18.47 +/- 0.1 mag to the LMC. Extra-planar features which are in front as well as behind the fitted plane are identified which match with the optically identified extra-planar features. The bar of the LMC is found to be part of the disk within 500 pc. The estimates of the structural parameters are found to be independent of the photometric bands used for the analysis. We find that the inner disk, within 3.0, is less inclined and has larger value of PA_lon when compared to the outer disk.
description: 13 pages, 16 figures, Accepted for publication in the journal Astronomy & Astrophysics
title: Sviluppo, realizzazione e test sperimentali su strada di un powertrain ibrido a celle a combustibile e batterie per un bus urbano e sub-urbano
Creators: name: Andaloro, Laura
name: Furgiuele, Franco
name: Fragiacomo, Petronilla
Publisher: name: Università della Calabria
Year: 2019

description: Dottorato di Ricerca in Ingegneria Civile ed Industriale. Ciclo XXXI
title: Role of PPARy in the complex interplay between brest cancer cells and tumor microenvironment
Creators: name: Gionfriddo, Giulia
name: Andò, Sebastiano
name: Bonofiglio, Daniela
Publisher: name: Università della Calabria
Year: 2019

description: Dottorato di Ricerca in Medicina Traslazionale. Ciclo XXXI
The uncorrelated long term gamma-ray and X-ray variability of blazars and its implications on disk-jet coupling
Creators: name: Bhattacharya, Debbijoy
name: Misra, Ranjeev
name: Rao, A. R.
name: Sreekumar, P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We examine the long term (~10 years) gamma-ray variability of blazars observed by EGRET and Fermi and find that for six sources the average flux varied by more than an order of magnitude. For two of these sources (PKS 0208-512 and PKS 0528+134), there were extensive observations (at various observing periods) by EGRET. Hence these dramatic variations are not due to a single short time-scale flare, but reflect long term changes in the average flux. Over the last twenty years, these two sources were also the target of several X-ray observatories (e.g. ROSAT, ASCA, RXTE, BeppoSAX, Chandra, Suzaku, XMM-Newton and Swift). While the ratios of the average gamma-ray fluxes between EGRET and Fermi observations are 22.9 +/- 1.9 and 12.6 +/- 1.5, their estimated 2-10 keV X-ray flux do not show such dramatic variations. The X-ray emission from such flat spectrum radio quasars (FSRQs) are believed to be due to synchrotron self Compton, while gamma-rays originate from inverse Comptonization of external soft photons from an accretion disk and/or broad line region. We argue that in this scenario, the only explanation for the uncorrelated variability is that there was an order of magnitude decrease in the external soft photons, while the jet parameters remained more or less constant. This result indicates that perhaps the accretion and jet processes are not tightly coupled in these sources.
description: 7 pages, 3 figures, to appear in MNRAS
Nonlinear dielectric geometric-phase metasurface with simultaneous structure and lattice symmetry design
Creators: name: Liu, Bingyi
name: Geromel, René
name: Su, Zhaoxian
name: Guo, Kai
name: Wang, Yongtian
name: Guo, Zhongyi
name: Huang, Lingling
name: Zentgraf, Thomas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, we utilize thin dielectric meta-atoms placed on a silver substrate to efficiently enhance and manipulate the third harmonic generation. We theoretically and experimentally reveal that when the structural symmetry of the meta-atom is incompatible with the lattice symmetry of an array, some generalized nonlinear geometric phases appear, which offers new possibilities for harmonic generation control beyond the accessible symmetries governed by the selection rule. The underlying mechanism is attributed to the modified rotation of the effective principal axis of a dense meta-atom array, where the strong coupling among the units gives rise to a generalized linear geometric phase modulation on the pump light. Therefore, nonlinear geometric phases carried by the third-harmonic emissions are the natural result of the wave-mixing process among the modes excited at the fundamental frequency. This mechanism further points out a new strategy to predict the nonlinear geometric phases delivered by the nanostructures according to their linear responses. Our design is simple and efficient, and offers alternatives for the nonlinear meta-devices that are capable of flexible photon generation and manipulation.
Monmouth University Poll: October 2019 South Carolina Democratic Primary
Creators: name: Monmouth University Polling Institute
Publisher: name: Roper Center for Public Opinion Research
Year: 2022

description: Registered to vote (2); voter likelihood (1); 2020 presidential primary (2); 2020 Democratic presidential primary (2); feelings about potential Democratic nominees (2); candidate electability versus incumbent (1); favorability of Democratic presidential candidates (12); important issues in Democratic presidential nomination support (2); Vice-President Joe Biden's activity in Ukraine (4).
Are hyperon resonances required in the elementary $K^+Λ$ photoproduction?
Creators: name: Mart, T.
name: Nurhadiansyah, N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have investigated the role of hyperon resonances in the kaon photoproduction process, $γp\to K^+Λ$, by using a covariant isobar model. To this end, new experimental data are used in the fitting process, whereas the old SAPHIR 1998 data are also used for comparison. The result indicates that the $Λ(1600)P_{01}$ and $Λ(1810)P_{01}$ hyperon resonances can significantly reduce the $χ^2$ and, simultaneously, can increase the hadronic form factor cut-off in the background terms. This finding is different from the result of the previous studies, which showed that the $Λ(1800)S_{01}$ was important for this purpose, instead of the $Λ(1600)P_{01}$.
description: 11 pages, 11 figures, dedicated to Professor Henryk Witala at the occasion of his 60th birthday
Cremastogaster hova Forel 1891
Creators: name: Forel, A.
Publisher: name: L'Imprimerie Nationale
Year: 1891
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Cremastogaster
Cremastogaster hova

description: 1. CREMASTOGASTER HOVA, Forel.
Cremastogaster hova, Forel, Bull, de la Soc. entomolog. de Suisse (octobre 1887).
description: Published as part of Forel, A., 1891, Histoire naturelle des Hymenopteres. Deuxieme partie: Les Formicides., pp. 1-231 in Histoire Physique, Naturelle et Politique de Madagascar., Paris :L'Imprimerie Nationale on page 180, DOI: 10.5281/zenodo.9896
Artificial Intelligence Technologies Using in Social Engineering Attacks
Creators: name: Fedushko, Solomia
Publisher: name: figshare
Year: 2021
Subjects: subject: 80609 Information Systems Management
subject: FOS: Computer and information sciences
subject: 80709 Social and Community Informatics
subject: FOS: Media and communications
subject: 150301 Business Information Management (incl. Records, Knowledge and Information Management, and Intelligence)
subject: FOS: Economics and business
subject: 80699 Information Systems not elsewhere classified
subject: 80703 Human Information Behaviour

description: This article aims to familiarize readers with the concept of social engineering. The main areas of work of attackers in the field of social engineering are also listed and reviewed. The methods of psychological influence on a person are considered, the basic techniques used by attackers are described. The article considers the concept of generative-competitive neural networks, describes a short history of their creation. The article also explores the concept of deepfake. Academic and amateur developments related to deepfake are reviewed. The principles of the operation of generative-competitive neural networks are considered. The article also outlines the main threats that cybercriminals can pose using computer technology and knowledge of the psychology of human behavior. In conclusion, the main methods of dealing with intruders are presented.
Functional renormalization of N scalars with O(N) invariance
Creators: name: Percacci, R.
name: Safari, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss general theories of N scalar fields with O(N) symmetry. In addition to the standard case of linearly realized symmetry there are also examples that carry nonlinear realizations, with the topology of a cylinder $R\times S^{N-1}$ or a sphere $S^N$. We write flow equations for the theory in the second order of the derivative expansion in the background field and discuss the properties of scaling solutions with vanishing potential.
description: 32 pages; v.2: one reference added, small corrections, to appear in PRD
Artificial Intelligence
Creators: name: Fedushko, Solomia
Publisher: name: figshare
Year: 2021
Subjects: subject: 80609 Information Systems Management
subject: FOS: Computer and information sciences
subject: 80709 Social and Community Informatics
subject: FOS: Media and communications
subject: 150301 Business Information Management (incl. Records, Knowledge and Information Management, and Intelligence)
subject: FOS: Economics and business
subject: 80699 Information Systems not elsewhere classified
subject: 80703 Human Information Behaviour

description: This article aims to familiarize readers with the concept of social engineering. The main areas of work of attackers in the field of social engineering are also listed and reviewed. The methods of psychological influence on a person are considered, the basic techniques used by attackers are described. The article considers the concept of generative-competitive neural networks, describes a short history of their creation. The article also explores the concept of deepfake. Academic and amateur developments related to deepfake are reviewed. The principles of the operation of generative-competitive neural networks are considered. The article also outlines the main threats that cybercriminals can pose using computer technology and knowledge of the psychology of human behavior. In conclusion, the main methods of dealing with intruders are presented.
Kommentare aus der Denkmalpflege: (Kommentar zur Auswertung 1995)
Creators: name: Kunow, Jürgen
Publisher: name: DGUF e.V.
Year: 2017

description: [nicht vorhanden / not available]
description: Archäologische Informationen, Bd. 20, Nr. 1 (1997): Archäologische Informationen
Isomorph invariance of Couette shear flows simulated by the SLLOD equations of motion
Creators: name: Separdar, Leila
name: Bailey, Nicholas P.
name: Schrøder, Thomas B.
name: Davatolhagh, Saeid
name: Dyre, Jeppe C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Non-equilibrium molecular dynamics simulations were performed to study the thermodynamic, structural, and dynamical properties of the single-component Lennard-Jones and the Kob-Andersen binary Lennard-Jones liquids. Both systems are known to be strongly correlating, i.e., have strong correlations between equilibrium thermal fluctuations of virial and potential energy. Such systems have good isomorphs, i.e., curves in the thermodynamic phase diagram along which structural, dynamical, and some thermodynamic quantities are invariant when expressed in reduced units. The SLLOD equations of motion were used to simulate Couette shear flows of the two systems. We show analytically that these equations are isomorph invariant provided the reduced strain rate is fixed along the isomorph. Since isomorph invariance is generally only approximate, a range of shear rates were simulated to test for the predicted invariance, covering both the linear and non-linear regimes. For both systems, when represented in reduced units the radial distribution function and the intermediate scattering function collapse for state points that are isomorphic. The strain-rate dependence of the viscosity, which exhibits shear thinning, is also invariant along an isomorph. Our results extend the isomorph concept to the state-state non-equilibrium situation of a shear flow, in which the phase diagram is three dimensional because the shear rate defines the third dimension.
Reversal of the circular dichroism in the angle-resolved photoemission from Bi2Te3
Creators: name: Scholz, M. R.
name: Sánchez-Barriga, J.
name: Braun, J.
name: Marchenko, D.
name: Varykhalov, A.
name: Lindroos, M.
name: Wang, Yung Jui
name: Lin, Hsin
name: Bansil, A.
name: Minár, J.
name: Ebert, H.
name: Volykhov, A.
name: Yashina, L. V.
name: Rader, O.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The helical Dirac fermions at the surface of topological insulators show a strong circular dichroism which has been explained as being due to either the initial-state spin angular momentum, the initial-state orbital angular momentum, or the handedness of the experimental setup. All of these interpretations conflict with our data from Bi2Te3 which depend on the photon energy and show several sign changes. Our one-step photoemission calculations coupled to ab initio theory confirm the sign change and assign the dichroism to a final-state effect. The spin polarization of the photoelectrons, instead, remains a reliable probe for the spin in the initial state.
description: 16 pages, 4 figures; submitted to Physical Review Letters
Artificial Intelligence Technologies Using in Social Engineering AttacksArtificial Intelligence Technologies Using in Social Engineering Attacks
Creators: name: Fedushko, Solomia
Publisher: name: figshare
Year: 2021
Subjects: subject: 80609 Information Systems Management
subject: FOS: Computer and information sciences
subject: 80709 Social and Community Informatics
subject: FOS: Media and communications
subject: 150301 Business Information Management (incl. Records, Knowledge and Information Management, and Intelligence)
subject: FOS: Economics and business
subject: 80699 Information Systems not elsewhere classified
subject: 80703 Human Information Behaviour

description: This article aims to familiarize readers with the concept of social engineering. The main areas of work of attackers in the field of social engineering are also listed and reviewed. The methods of psychological influence on a person are considered, the basic techniques used by attackers are described. The article considers the concept of generative-competitive neural networks, describes a short history of their creation. The article also explores the concept of deepfake. Academic and amateur developments related to deepfake are reviewed. The principles of the operation of generative-competitive neural networks are considered. The article also outlines the main threats that cybercriminals can pose using computer technology and knowledge of the psychology of human behavior. In conclusion, the main methods of dealing with intruders are presented.
On minimal Lagrangian surfaces in the product of Riemannian two manifolds
Creators: name: Georgiou, Nikos
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Let $(Σ_1,g_1)$ and $(Σ_2,g_2)$ be connected, complete and orientable Riemannian two manifolds. Consider the two canonical Kähler structures $(G^ε,J,Ω^ε)$ on the product 4-manifold $Σ_1\timesΣ_2$ given by $ G^ε=g_1\oplus εg_2$, $ε=\pm 1$ and $J$ is the canonical product complex structure. Thus for $ε=1$ the Kähler metric $G^+$ is Riemannian while for $ε=-1$, $G^-$ is of neutral signature. We show that the metric $G^ε$ is locally conformally flat iff the Gauss curvatures $κ(g_1)$ and $κ(g_2)$ are both constants satisfying $κ(g_1)=-εκ(g_2)$. We also give conditions on the Gauss curvatures for which every $G^ε$-minimal Lagrangian surface is the product $γ_1\timesγ_2\subsetΣ_1\timesΣ_2$, where $γ_1$ and $γ_2$ are geodesics of $(Σ_1,g_1)$ and $(Σ_2,g_2)$, respectively. Finally, we explore the Hamiltonian stability of projected rank one Hamiltonian $G^ε$-minimal surfaces.
description: 23 pages
Elastic interface acoustic waves in twinned crystals
Creators: name: Destrade, Michel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A new type of Interface Acoustic Waves (IAW) is presented, for single-crystal orthotropic twins bonded symmetrically along a plane containing only one common crystallographic axis. The effective boundary conditions show that the waves are linearly polarized at the interface, either transversally or longitudinally. Then the secular equation is obtained in full analytical form using new relationships for the displacement-traction quadrivector at the interface. For Gallium Arsenide and for Silicon, it is found that the IAWs with transverse (resp. longitudinal) polarization at the interface are of the Stoneley (resp. leaky) type.
Thermalization of Levy flights: Path-wise picture in 2D
Creators: name: Zaba, Mariusz
name: Garbaczewski, Piotr
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We analyze two-dimensional (2D) random systems driven by a symmetric Lévy stable noise which, under the sole influence of external (force) potentials $Φ(x) $, asymptotically set down at Boltzmann-type thermal equilibria. Such behavior is excluded within standard ramifications of the Langevin approach to Lévy flights. In the present paper we address the response of Lévy noise not to an external conservative force field, but directly to its potential $Φ(x)$. We prescribe a priori the target pdf $ρ_*$ in the Boltzmann form $\sim \exp[- Φ(x)]$ and next select the Lévy noise of interest. Given suitable initial data, this allows to infer a reliable path-wise approximation to a true (albeit analytically beyond the reach) solution of the pertinent master equation, with the property $ρ(x,t)\rightarrow ρ_*(x)$ as time $t$ goes to infinity. We create a suitably modified version of the time honored Gillespie's algorithm, originally invented in the chemical kinetics context. A statistical analysis of generated sample trajectories allows us to infer a surrogate pdf dynamics which consistently sets down at a pre-defined target pdf. We pay special attention to the response of the 2D Cauchy noise to an exemplary locally periodic "potential landscape" $Φ(x), x\in R^2$.
description: 11 pages, 6 figures
Wide temperature span of entropy change in first-order metamagnetic MnCo1-xFexSi
Creators: name: Xu, Jianhui
name: Yang, Wenyun
name: Du, Qianheng
name: Xia, Yuanhua
name: Liu, Xiaomin
name: Du, Honglin
name: Yang, Jinbo
name: Wang, Changsheng
name: Han, Jiangzhi
name: Liu, Shunquan
name: Zhang, Yan
name: Yang, Yingchang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The crystal structure and magnetic properties of MnCoxFe1-xSi (x=0-0.5) compounds were investigated. With increasing Fe content, the unit cell changes anisotropically and the magnetic property evolves gradually: Curie temperature decreases continuously, the first-order metamagnetic transition from a low-temperature helical antiferromagnetic state to a high-temperature ferromagnetic state disappears gradually and then a spin-glass-like state and another antiferromagnetic state emerge in the low temperature region. The Curie transition leads to a moderate conventional entropy change. The metamagnetic transition not only yields a larger negative magnetocaloric effect at lower applied fields than in MnCoSi but also produces a very large temperature span (103 K for H=5 T) of delta S(T), which results in a large refrigerant capacity. These phenomena were explained in terms of crystal structure change and magnetoelastic coupling mechanism. The low-cost MnCo1-xFexSi compounds are promising candidates for near room temperature magnetic refrigeration applications because of the large isothermal entropy change and the wide working temperature span.
description: 9 pages, 5 figures, 1 table
Constrained Minimal Supersymmetric Standard Model with Generalized Yukawa Quasi-Unification
Creators: name: Karagiannakis, N.
name: Lazarides, G.
name: Pallis, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the constrained minimal supersymmetric standard model with mu>0 supplemented by a generalized `asymptotic' Yukawa coupling quasi-unification condition, which allows an acceptable b-quark mass. We impose constraints from the cold dark matter abundance in the universe, B physics, and the mass of the lightest neutral CP-even Higgs boson. We find that, in contrast to previous results obtained for a more restrictive Yukawa quasi-unification condition, the lightest neutralino can act as a cold dark matter candidate in a relatively wide parameter range. In this range, the lightest neutralino relic abundance is drastically reduced mainly by stau-antistau coannihilations and, thus, the upper bound on this abundance from cold dark matter considerations becomes compatible with the recent data on the branching ratio of B_s --> mu^+mu^-. Also, masses for the lightest neutral CP-even Higgs boson about (125-126) GeV, favored by LHC, can be easily accommodated. The mass of the lightest neutralino, though, comes out large (~1 TeV).
description: 12 pages including 6 figures, Revtex; Comments, references and acknowledgments added
Improvement of the matching of the exact solution and variational approaches in an interacting two-fermion system
Creators: name: Liu, Yanxia
name: Ye, Jun
name: Li, Yuanyuan
name: Zhang, Yunbo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A more reasonable trial ground state wave function is constructed for the relative motion of an interacting two-fermion system in a 1D harmonic potential. At the boundaries both the wave function and its first derivative are continuous and the quasi-momentum is determined by a more practical constraint condition which associates two variational parameters. The upper bound of the ground state energy is obtained by applying the variational principle to the expectation value of the Hamiltonian of relative motion on the trial wave function. The resulted energy and wave function show better agreement with the analytical solution than the original proposal.
description: 5 pages, 3 figures, submitted to PRA
Rayleigh waves and surface stability for Bell materials in compression; comparison with rubber
Creators: name: Destrade, Michel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The stability of a Bell-constrained half-space in compression is studied. To this end, the propagation of Rayleigh waves on the surface of the material when it is maintained in a static state of triaxial prestrain is considered. The prestrain is such that the free surface of the half-space is a principal plane of deformation. The exact secular equation is established for surface waves traveling in a principal direction of strain with attenuation along the principal direction normal to the free plane. As the half-space is put under increasing compressive loads, the speed of the wave eventually tends to zero and the bifurcation criterion, or stability equation, is reached. Then the analysis is specialized to specific forms of strain energy functions and prestrain, and comparisons are made with results previously obtained in the case of incompressible neo-Hookean or Mooney-Rivlin materials. It is found that these rubber-like incompressible materials may be compressed more than "Bell empirical model" materials, but not as much as "Bell simple hyperelastic" materials, before the critical stretches, solutions to the bifurcation criterion, are reached. In passing, some classes of incompressible materials which possess a relative-universal bifurcation criterion are presented.
Renormalization of the cyclic Wilson loop
Creators: name: Berwein, Matthias
name: Brambilla, Nora
name: Ghiglieri, Jacopo
name: Vairo, Antonio
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In finite-temperature field theory, the cyclic Wilson loop is defined as a rectangular Wilson loop spanning the whole compactified time direction. In a generic non-abelian gauge theory, we calculate the perturbative expansion of the cyclic Wilson loop up to order g^4. At this order and after charge renormalization, the cyclic Wilson loop is known to be ultraviolet divergent. We show that the divergence is not associated with cusps in the contour but is instead due to the contour intersecting itself because of the periodic boundary conditions. One consequence of this is that the cyclic Wilson loop mixes under renormalization with the correlator of two Polyakov loops. The resulting renormalization equation is tested up to order g^6 and used to resum the leading logarithms associated with the intersection divergence. Implications for lattice studies of this operator, which may be relevant for the phenomenology of quarkonium at finite temperature, are discussed.
description: 30 pages, 21 figures. Reference and note added, journal version
Acute Bilateral Cataract in Type 1 Diabetes Mellitus
Creators: name: PAPADIMITRIOU, DIMITRIOS
name: Bothou, Christina
name: Skarmoutsos, Filippos
name: Papaevangelou, Vassiliki
name: Papadimitriou, Anastasios
Publisher: name: figshare
Year: 2020
Subjects: subject: 110306 Endocrinology
subject: FOS: Clinical medicine
subject: 111403 Paediatrics

description: We report a case of a 17-year old boy, who presented acute bilateral cataractand complete vision loss within six days, three months after the diagnosis of Type 1Diabetes Mellitus (T1DM)under optimal metabolic control (HbA1c 6%).At presentation(HbA1c 10.4%) and after correction of diabetic ketoacidosis (pH 6.917)and thebeginning of intensified insulin treatment with insulin glargine once daily and insulinaspart before meals,the patient underwent full ophthalmologic examination,which wascompletely normal.Only few cases with acute bilateral cataract - all relatively shortlyafter the diagnosis of T1DM - have been reported. Several hypotheses have beendrawn but the exact mechanism of this phenomenon remains unclear. The interestingfinding in our case was the clearly elevated insulin autoantibodies (IAA) at the timeof cataract formation, negative however at presentation. The relation between theelevation of IAA and cataract formation should be further investigated in diabeticpatients.
title: HOLOCENE HYDROCLIMATIC AND VEGETATION RECONSTRUCTION IN THE SIERRA NEVADA USING POLLEN AND STABLE ISOTOPES FROM CONVICT LAKE
Creators: name: Black, Morgan
Publisher: name: University of Kentucky Libraries
Year: 2019

description: The forested environments of the subalpine and upper montane zones of the eastern Sierra Nevada mountains (California) are biodiverse and valuable ecosystems that are sensitive to hydroclimate changes. The history of high-altitude vegetation changes in the eastern Sierra Nevada is underexplored, and this knowledge gap can be addressed using a paleolimnological approach. In this study, we use a long (~9.5 m) sediment core from Convict Lake, a glacial lake situated in the upper montane zone of California’s Sherwin Range, to assess Holocene changes in terrestrial vegetation. The core was dated using radiocarbon, and studied with palynology, elemental analysis, and stable isotope geochemistry applied to bulk organic matter. Pollen assemblages provide evidence of a dry, open woodland in the Convict Creek watershed during the early Holocene, while the data indicate a stable, cool, and relatively wet mid-Holocene with subalpine forests occurring at lower elevations. All datasets point to considerable hydroclimatic variability beginning around 4,500 yr B.P., which may reflect warmer temperatures and more variable winter precipitation. The presence of the subalpine indicator species Tsuga mertensiana coincides with potential late Holocene glacial advances for which scant evidence currently exists. New insights from this study provide crucial baseline data for comparison with climate simulations of the future for the Sierra Nevada, which serve as the most important water source for vast urban and agricultural areas in California and provide millions of dollars in economic revenue annually.
description: Copyright © Morgan Katherine Black 2019
An Analysis on Minimum s-t Cut Capacity of Random Graphs with Specified Degree Distribution
Creators: name: Fujii, Yuki
name: Wadayama, Tadashi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The capacity (or maximum flow) of an unicast network is known to be equal to the minimum s-t cut capacity due to the max-flow min-cut theorem. If the topology of a network (or link capacities) is dynamically changing or unknown, it is not so trivial to predict statistical properties on the maximum flow of the network. In this paper, we present a probabilistic analysis for evaluating the accumulate distribution of the minimum s-t cut capacity on random graphs. The graph ensemble treated in this paper consists of weighted graphs with arbitrary specified degree distribution. The main contribution of our work is a lower bound for the accumulate distribution of the minimum s-t cut capacity. From some computer experiments, it is observed that the lower bound derived here reflects the actual statistical behavior of the minimum s-t cut capacity of random graphs with specified degrees.
description: 5 pages, Submitted to ISIT 2013. arXiv admin note: substantial text overlap with arXiv:1202.0876
Detecting an exciton crystal by statistical means
Creators: name: Breyel, David
name: Soller, Henning
name: Schmidt, Thomas L.
name: Komnik, Andreas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate an ensemble of excitons in a coupled quantum well excited via an applied laser field. Using an effective disordered quantum Ising model, we perform a numerical simulation of the experimental procedure and calculate the probability distribution function $P(M)$ to create $M$ excitons as well as their correlation function. It shows clear evidence of the existence of two phases corresponding to a liquid and a crystal phase. We demonstrate that not only the correlation function but also the distribution $P(M)$ is very well suited to monitor this transition.
description: 5 pages, 5 figures
Open Science Policy and its Promotion in Japan, and International Developments
Creators: name: Murayama, Yasuhiro
Publisher: name: Zenodo
Year: 2020
Subjects: Open Data
FAIR data principles
government open science policy
G7
S20

description: Open Science policy and practices in Japan is reviewed in context of the international development of open science high-level policies and international organizations. 
description: This presentation is a contribution from the PARSEC team. PARSEC is a project sponsored by the Belmont Forum as part of its Collaborative Research Action (CRA) on Science-Driven e-Infrastructures Innovation (SEI), with funding from FAPESP, the ANR, JST and the NSF, with collaborators from Australia, and support from the synthesis centre CESAB of the French Foundation for Research on Biodiversity.
D.5.4 Advanced data analytics for optimal control
Creators: name: Islam Maruf, Md Nasimul
name: Millet Biosca, Lluís
name: Mittelsdorf, Marco
name: Werner, Daniel
name: Bilal Sherbaz, Ahmad
Publisher: name: Zenodo
Year: 2022

description: Executive Summary Task 5.4 aims at integrating the previous WP5 tasks to perform actual control actions according to the devised control strategy. The bridge between the words optimal and control are realised by looking at the results received from the optimiser and then implementing real-life control actions over devices and recommending demand response actions for consumers. Task 5.4 performs advanced data analytics for optimal control and includes integrating several tasks from WP5. First, it considers the principles of the REACT user engagement approach. The optimiser provides a day-ahead planning strategy for energy end-users regarding asset utilisation with the possibility of re-running the process in intraday intervals. The REACTforecast-optimise-controlloop represents an arrangement of services that communicate with each other and provide automatic management of the assets (e.g., batteries, heat pumps, etc.) so that the power system can achieve overall benefits. The forecast starts with data acquisition on pilot sites, which is subsequently utilised for training machine learning models for weather and energy predictions. The outputs of these prediction algorithms are then fed into the optimisation engine. The optimisation engine is an integral part of the REACT platform designed to provide setpoint values to ensure the efficient day-to-day operation of the system. It gives recommendations for optimal load modifications and asset management. The outputs are processed by the electric domain battery and inverter control orchestrator, and the thermal domain Building Simulator. The Building Simulator schedules hourly control actions to be performed for the next day. The Consumer Recommender Service can generate and send recommendations in the form of PUSH notifications to the REACT Android mobile app. The control actions are sent to all the connected devices through the REACT cloud platform, including heat pumps and batteries. Task 5.4 developed different battery control strategies. In addition, an Energy Box has been designed to achieve direct load control. The report discusses the OpenMUC implementation in detail (channels, parameters, etc.) of the battery controllers, power-to-hydrogen system (CTS H2home), and the Electric Vehicle bidirectional charger (Wallbox Quasar). The MIDAC and MELCloud implementations are also discussed from the REACT platform integration viewpoint. We also discussed the plausibility of additional control for larger heat pump systems for large buildings. Finally, we test and validate the tasks in two steps. First, tested and validated the control functions from the OpenMUC energy gateway perspective. Then we demonstrated how the envisioned control loop comes into realisation within the overarching umbrella of the WP5.
title: Studio di un impianto a concentrazione solare con riflettori di Fresnel a movimentazione biassiale
Creators: name: Nicoletti, Francesco
name: Furgiuele, Franco
name: Cucumo, Mario Antonio
Publisher: name: Università della Calabria
Year: 2019

description: Dottorato di Ricerca in Ingegneria Civile e Industriale. Ciclo XXXI