cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Optimization of powder metallurgy process parameters to recycle AZ91 magnesium alloy
Creators: name: Kumar, N.
name: Bharti , A.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2021
Subjects: ANOVA
AZ91 Mg Alloy
Powder Metallurgy
Sintered Density
Taguchi

description: A global increase in the demand for magnesium and its alloys has put increased pressure on magnesium's natural sources (magnesium ores) due to its high strength to weight ratio and environment-friendly nature. Therefore, it has become necessary to look for efficient recycling techniques for magnesium and its alloys. Powder metallurgy proved to be very efficient compared to conventional recycling techniques for the recycling of aluminum, copper, and other alloys. In the present work, an experimental study was done to see the suitability of powder metallurgy for recycling magnesium and its alloy. Optimization of process parameters (compaction pressure, sintering temperature, and sintering time) was done with respect to AZ91 magnesium alloy's sintered density because almost all the properties (i.e., physical, mechanical, electrical, thermal, etc.) of a powder metallurgy product are dependent on the sintered density. Sintered density is dependent on the extent of diffusion and the thermal expansion in the material. And the extent of diffusion and the thermal expansion depends on the compaction pressure, sintering temperature, and sintering time. After experimental and statistical investigations, it was observed that the compaction pressure is the most influencing parameter. The optimum set of process parameters was found out to be a combination of compaction pressure of 450MPa, the sintering temperature of 723K, and sintering time of 2h.
Sub-Chandrasekhar-mass detonations are in tension with the observed $t_0-M_\text{Ni56}$ relation of type Ia supernovae
Creators: name: Kushnir, Doron
name: Wygoda, Nahliel
name: Sharon, Amir
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Type Ia supernovae (SNe Ia) are likely the thermonuclear explosions of carbon-oxygen (CO) white-dwarf (WD) stars, but their progenitor systems remain elusive. Recent studies have suggested that a propagating detonation within a thin helium shell surrounding a sub-Chandrasekhar mass CO core can subsequently trigger a detonation within the core (the double-detonation model, DDM). The outcome of this explosion is similar to a central ignition of a sub-Chandrasekhar mass CO WD (SCD). While SCD is consistent with some observational properties of SNe Ia, several computational challenges prohibit a robust comparison to the observations. We focus on the observed $t_0-M_\text{Ni56}$ relation, where $t_0$ (the $γ$-rays' escape time from the ejecta) is positively correlated with $M_\text{Ni56}$ (the synthesized $^{56}$Ni mass). We apply our recently developed numerical scheme to calculate SCD and show that the calculated $t_0-M_\text{Ni56}$ relation, which does not require radiation transfer calculations, converges to an accuracy of a few percent. We find a clear tension between our calculations and the observed $t_0-M_\text{Ni56}$ relation. SCD predicts an anti-correlation between $t_0$ and $M_\text{Ni56}$, with $t_0\approx30\,\textrm{day}$ for luminous ($M_\text{Ni56}\gtrsim0.5\,M_{\odot}$) SNe Ia, while the observed $t_0$ is in the range of $35-45\,\textrm{day}$. We show that this tension is larger than the uncertainty of the results, and that it exists in all previous studies of the problem. Our results hint that more complicated models are required, but we argue that DDM is unlikely to resolve the tension with the observations.
description: 24 pages, 20 figures. Main results in the first 3 pages with 1 figure. Minor revisions following referee's report
Solvable PT-symmetric model with a tunable interspersion of non-merging levels
Creators: name: Znojil, Miloslav
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the spectrum in such a PT-symmetric square well of a diameter L where the "strength of the non-Hermiticity" is controlled by the two parameters, viz., by an imaginary coupling ig and by the distance d of its onset from the origin. We solve this problem and confirm that the spectrum is discrete and real in a non-empty interval of g. Surprisingly, a specific distinction between the bound states is found in their asymptotic stability/instability with respect to an unlimited growth of g. In our model, all of the low-lying levels remain asymptotically unstable at the small d and finite L while only the stable levels survive for d near L or in the purely imaginary well with infinite L. In between these two extremes, an unusual and tunable, variable pattern of the interspersed "robust" and "fragile" subspectra of the real levels is obtained.
description: final version: 33 pages (plus the old 8 figures of version 1)
Precision Measurements of the Semileptonic Charm Decays $D^0 \to π^- \ell^+ ν$ and $D^0 \to K^- \ell^+ ν$
Creators: name: Liu, F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate the decays $D^0\toπ^-\ell^+ν$ and $D^0\to K^-\ell^+ ν$, where $\ell$ is $e$ or $μ$, using approximately 7 ${\rm fb}^{-1}$ of data collected with the CLEO III detector. We find $R_0\equiv {\cal B}(D^0\to π^-e^+ν)/{\cal B}(D^0\to K^-e^+ν)= 0.082 \pm 0.006 \pm 0.005$. Fits to the kinematic distributions of the data provide parameters describing the form factor of each mode. Combining the form factor results and $R_0$ gives $|f^π_{+}(0)|^2 |V_{cd}|^2/|f^K_{+}(0)|^2 |V_{cs}|^2 = 0.038^{+0.006+0.005}_{-0.007-0.003}$.
description: 5 pages, 2 figures, talk given at DPF'04, UC Riverside, CA
title: Peer Interaction, Cognition And Argumentative Writing (Key Stage 2 Children)
Creators: name: Gélat, Mona
Publisher: name: The Open University
Year: 2001

description: Argumentative writing, which has become a National Curriculum requirement, is recognised to be a cognitively taxing undertaking at Key Stage 2 This dissertation describes an experiment using a multiple research approach to investigate 10-year-olds in peer groups of three, interacting in preparation for a written argument. This situation was hypothesised to foster logical reasoning which could affect writing quality. The study contrasts the peer support strategy with the pervasive teacher direct instruction of composition writing, It also investigates the effects of each of the two conditions on the written task. Both experimentals and controls, each 33 in number, were selected to be quasi-equal in written, verbal and general abilities. Direct observations and talk transcripts show that the experimental participants used sustained deductive utterances and modelled the written argumentative structure verbally during their interactions. The teacher-led strategy, however, was constraining and hindered extended speech and logical reasoning. The peer learning and assistance process is explained in terms of both Vygotskian and Piagetian social constructivist perspectives. The subsequent written scripts were close-read, compared and evaluated both qualitatively and quantitatively in terms of (a) stating and instantiating viewpoints, (b) sequencing and coherence and (c) processing content material. The reasoning at micro-level within the clauses was quantified. Findings indicate that the experimentals significantly excelled the controls’ performance in both adjustment to argument form and the internal reasoning. It suggested that implementing the strategy at Key Stage 2 can be facilitating, particularly in large sized classes.
Less naive about supersymmetric lattice quantum mechanics
Creators: name: Giedt, Joel
name: Koniuk, Roman
name: Poppitz, Erich
name: Yavin, Tzahi
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explain why naive discretization results that have appeared in [hep-lat/0006013] do not appear to yield the desired continuum limit. The fermion propagator on the lattice inevitably yields a diagram with nonvanishing UV degree D=0 contribution in lattice perturbation theory, in contrast to what occurs in the continuum. This diagram gives a finite correction to the boson 2-point function that must be subtracted off in order to obtain the perturbation series of the continuum theory, in the limit where the lattice spacing $a$ vanishes. Using a transfer matrix approach, we provide a nonperturbative proof that this counterterm suffices to yield the desired continuum limit. This analysis also allows us to improve the action to O(a). We demonstrate by Monte Carlo simulation that the spectrum of the continuum theory is well-approximated at finite but small $a$, for both weak and strong coupling. We contrast the above situation for the naive lattice action to what occurs for the supersymmetric lattice action, which preserves a discrete version of half the supersymmetry. There, cancellations between D=0 diagrams occur, obviating the need for counterterms.
description: 22 pages, 5 figures; Appendix added to provide details on transfer matrix formalism; minor textual revisions for clarity
Additional file 3 of Can consumer wearable activity tracker-based interventions improve physical activity and cardiometabolic health in patients with chronic diseases? A systematic review and meta-analysis of randomised controlled trials
Creators: name: Franssen, Wouter M. A.
name: Franssen, Gregor H. L. M.
name: Spaas, Jan
name: Solmi, Francesca
name: Eijnde, Bert O.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Marine Biology
subject: Science Policy

description: Additional file 3: Appendix III Funnel plots.
Challenges in Benchmarking Stream Learning Algorithms with Real-world Data
Creators: name: Souza, Vinicius M. A.
name: Reis, Denis M. dos
name: Maletzke, Andre G.
name: Batista, Gustavo E. A. P. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: I.2.6
subject: 68T05

description: Streaming data are increasingly present in real-world applications such as sensor measurements, satellite data feed, stock market, and financial data. The main characteristics of these applications are the online arrival of data observations at high speed and the susceptibility to changes in the data distributions due to the dynamic nature of real environments. The data stream mining community still faces some primary challenges and difficulties related to the comparison and evaluation of new proposals, mainly due to the lack of publicly available non-stationary real-world datasets. The comparison of stream algorithms proposed in the literature is not an easy task, as authors do not always follow the same recommendations, experimental evaluation procedures, datasets, and assumptions. In this paper, we mitigate problems related to the choice of datasets in the experimental evaluation of stream classifiers and drift detectors. To that end, we propose a new public data repository for benchmarking stream algorithms with real-world data. This repository contains the most popular datasets from literature and new datasets related to a highly relevant public health problem that involves the recognition of disease vector insects using optical sensors. The main advantage of these new datasets is the prior knowledge of their characteristics and patterns of changes to evaluate new adaptive algorithm proposals adequately. We also present an in-depth discussion about the characteristics, reasons, and issues that lead to different types of changes in data distribution, as well as a critical review of common problems concerning the current benchmark datasets available in the literature.
description: Preprint of article accepted for publication in the journal Data Mining and Knowledge Discovery
Spherical Infall in G10.6-0.4: Accretion Through an Ultracompact HII Region
Creators: name: Sollins, Peter K.
name: Zhang, Qizhou
name: Keto, Eric
name: Ho, Paul T. P
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high resolution (0.''12 x 0.''079) observations of the ultracompact HII region G10.6-0.4 in 23 GHz radio continuum and the NH3(3,3) line. Our data show that the infall in the molecular material is largely spherical, and does not flatten into a molecular disk at radii as small as 0.03 pc. The spherical infall in the molecular gas matches in location and velocity the infall seen in the ionized gas. We use a non-detection to place a stringent upper limit on the mass of an expanding molecular shell associated with pressure driven expansion of the HII region. These data support a scenario in which the molecular accretion flow passes through an ionization front and becomes an ionized accretion flow onto one or more main sequence stars, not the classical pressure-driven expansion scenario. In the continuum emission we see evidence for externally ionized clumps of molecular gas, and cavities evacuated by an outflow from the central source.
description: Accepted for publication in Astrophysical Journal Letters
SU(1,1) echoes for breathers in quantum gases
Creators: name: Lv, Chenwei
name: Zhang, Ren
name: Zhou, Qi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Though the celebrated spin echoes have been widely used to reverse quantum dynamics, they are not applicable to systems whose constituents are beyond the control of the su(2) algebra. Here, we design echoes to reverse quantum dynamics of breathers in three-dimensional unitary fermions and two-dimensional bosons and fermions with contact interactions, which are governed by an underlying su(1,1) algebra. Geometrically, SU(1,1) echoes produce closed trajectories on a single or multiple Poincare disks and thus could recover any initial states without changing the sign of the Hamiltonian. In particular, the initial shape of a breather determines the superposition of trajectories on multiple Poincare disks and whether the revival time has period multiplication. Our work provides physicists with a recipe to tailor collective excitations of interacting many-body systems.
description: 6 pages (4 figures) + 4 pages (3 figures)
Additional file 1 of Reduced complement of dopaminergic neurons in the substantia nigra pars compacta of mice with a constitutive “low footprint” genetic knockout of alpha-synuclein
Creators: name: Goloborshcheva, Valeria V.
name: Chaprov, Kirill D.
name: Teterina, Ekaterina V.
name: Ovchinnikov, Ruslan
name: Buchman, Vladimir L.
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1 Expression levels of Mmrn1 mRNA in the cerebral cortex of wild type and synuclein null mutant mice. Bar chart shows relatives level of Mmrn1 mRNA in the cerebral cortex of the wild type (WT), B6(Cg)- Sncatm1.2Vlb/J alpha-synuclein null (SncaVlb) and B6(Cg)-Sncatm1Rosl/J alpha-synuclein null (SncaRosl) mice estimated by real-time quantitative RT-PCR.
title: Handel im Wandel. Revitalisierung: Handelszentrum Floridsdorf
Creators: name: Crisafulli, Sandra
Publisher: name: TU Wien
Year: 2016
Subjects: subject: Handel
subject: Stadtentwicklung
subject: Wien
subject: retail
subject: urban development
subject: Vienna

description: Handel und Stadt stehen von Beginn an in einer engen Verbindung. Handel übernimmt einerseits die wichtige Funktion der Versorgung im System Stadt und ist ein Generator lebendiger Straßen. Er prägt unser Stadtbild und verortet, bildet er Zentren - Treffpunkte des täglichen Lebens aber auch des Vergnügens. Handel umfasst somit ein breites Spektrum - vom Nahversorger bis zum Konsumtempel auf der grünen Wiese. Andererseits steht er dadurch in einem permanenten Konkurrenzkampf, der im schlimmsten Fall zu leerstehenden Geschäftsflächen und damit zur Verödung von vormals lebendigen Straßen oder Stadtzentren führt. Inwieweit wird Stadtentwicklung von Handel angetrieben oder ev. sogar gehemmt? Wer sind die Beteiligten in diesen Prozessen und könnte Handel in Zukunft ein Instrument für Stadtplanung sein? Neben einem geschichtlichen Abriss, wie moderner Handel Stadtentwicklung beeinflusst hat und einen kurzen Einblick in die Handelsbetriebslehre, wird der These des Strukturwandels im Einzelhandel nachgegangen. Ausgehend von dem Standort Floridsdorf: Franz-Jonas-Platz - Am Spitz - seit einigen Jahren von einem sogenannten "trading down" Prozess geprägt - wurde ein Konzept zur Revitalisierung des Bezirkszentrums ausgearbeitet und überprüft, inwieweit sich Handel aus Sicht der Stadtentwicklung planen lässt.
description: From the outset, commerce and cities are in a tight connection. Trade provides the supply function in the system of a city and generates urbanity. It shapes the cityscape and forms centers - meeting points of daily life. Retail comprises a broad spectrum - from local convenience stores to shopping malls in suburbia. There is constant competition which leads - in worst case - to vacant shops and further effects obliteration of former vibrant streets or city centers. To what extent is urban development pushed by retail or maybe restrained? Which stakeholders are involved in these processes and could commerce be a tool for urban planning in the future? In addition to a historical outline, describing how retail has influenced cities and a brief insight into the study of commerce, the matter of structural change in retail will be pursued. Based on the location, Floridsdorf in Vienna - dominated for several years by a trading down process - a concept for the revitalization of the district center is drafted and the idea of planning trade from an urban perspective gets reviewed.
Taylor series of Landauer conductance
Creators: name: Ramirez, Carlos
name: Rodriguez, Mauricio J.
name: Gomez, Bryan D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this paper, we propose a method to calculate the exact Taylor series of the scattering matrix in general multiterminal tight-binding systems to arbitrary order N, which allows us to find the Taylor expansion of Landauer conductance in mesoscopic systems. The method is based on the recursive scattering matrix method (RSMM) that permits us to find the scattering matrix of a system from the scattering matrices of its subsystems. Following ideas of automatic differentiation, we determine expressions for the sum, product, inverse, and diagonalization of a matrix Taylor expansion, and use them into the RSMM to find Taylor series of scattering matrices. The method is validated by obtaining the transmission function of atomic chains with site defects and graphene nanoconstrictions. Finally, an analysis of convergence radius and error estimations of these Taylor expansions is presented.
description: 3 figures
Extragalactic source contributions to arcminute-scale Cosmic Microwave Background anisotropies
Creators: name: Toffolatti, L.
name: Negrello, M.
name: González-Nuevo, J.
name: De Zotti, G.
name: Silva, L.
name: Granato, G. L.
name: Argüeso, F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The possible contributions of the various classes of extragalactic sources (including, in addition to the canonical radio sources, GHz Peaked Spectrum sources, advection-dominated sources, starburst galaxies, high-redshift proto-spheroidal galaxies) to the arcminute scale fluctuations measured by the CBI, BIMA, and ACBAR experiments are discussed. At 30 GHz, fluctuations due to radio sources undetected by ancillary low-frequency surveys may be higher than estimated by the CBI and BIMA groups. High-redshift dusty galaxies, whose fluctuations may be strongly enhanced by the effect of clustering, could contribute to the BIMA excess signal, and dominate at 150 GHz (the ACBAR frequency). Moreover, in the present data situation, the dust emission of these high-redshift sources set an unavoidable limit to the detection of primordial CMB anisotropies at high multipoles, even at frequencies as low as $\simeq 30$ GHz. It is concluded that the possibility that the excess power at high multipoles is dominated by unsubtracted extragalactic sources cannot be ruled out. On the other hand, there is room for a contribution from the Sunyaev-Zeldovich effect within clusters of galaxies, with a density fluctuation amplitude parameter $σ_8$ consistent with the values preferred by current data.
description: 7 pages, 3 figures, A&A in press
title: Workers' Councils In Portugal 1974-1975
Creators: name: Robinson, Peter Forbes
Publisher: name: The Open University
Year: 1990

description: Democratic workplace organisations have provided the basic component of every significant working class revolutionary movement. One of the characteristics of revolutionary periods is how readily workplace organisations coordinate their struggles by establishing higher level bodies on the basis of elected delegates. The term "workers' council" is used in this sense - an organisation which links workers from different enterprises. This thesis provides a substantial background chapter covering the events in Portugal in 1974/5 before describing, in depth, four studies of embryonic workers' councils. The case studies are of: the Inter-Empresas (May 74 - March 75) the CRTSMs (April 75 - June 75) the Popular Assemblies (July 75 - November 75) the Setubal Comite de Lute (October 75 - November 75) In choosing the examples the following criteria were selected: a) the democratic nature of the organisations b) the importance of the revolutionary left c) their potential role, as envisaged by the organisation, as an alternative form of power? The study draws upon first hand experiences as a political organiser in Lisbon, working for a British organisation, and upon interviews, mainly with activists from the revolutionary left. It tries to show some inter-relationship between this revolutionary left and the development of the workers' movement. The conclusion is in two parts. The first is at the general level. It argues that the organisations managed to capture the limelight for brief moments, yet in retrospect, they never attained a leading role. By looking at the military, the role and failure of the popular power movement and the strength of its counterpart reformism, some suggestions are made as to why the workers' council movement was relatively weak. At the micro level workers' councils type formations are compared, looking specifically at the features identified as being salient. The conclusion attempts to draw a distinction between the actual strength of the embryonic councils and their potential. However embryonic, the developments have a significance beyond that of the Portuguese political history insofar as they contribute to the body of knowledge about workers' councils and revolutionary activity.
Additional file 1 of Can consumer wearable activity tracker-based interventions improve physical activity and cardiometabolic health in patients with chronic diseases? A systematic review and meta-analysis of randomised controlled trials
Creators: name: Franssen, Wouter M. A.
name: Franssen, Gregor H. L. M.
name: Spaas, Jan
name: Solmi, Francesca
name: Eijnde, Bert O.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Marine Biology
subject: Science Policy

description: Additional file 1: Appendix I Pubmed search.
A novel variational approach for Quantum Field Theory: example of study of the ground state and phase transition in Nonlinear Sigma Model
Creators: name: Mishchenko, Yuriy
name: Ji, Chueng-Ryong
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss a novel form of the variational approach in Quantum Field Theory in which the trial quantum configuration is represented directly in terms of relevant expectation values rather than, e.g., increasingly complicated structure from Fock space. The quantum algebra imposes constraints on such expectation values so that the variational problem is formulated here as an optimization under constraints. As an example of application of such approach we consider the study of ground state and critical properties in a variant of nonlinear sigma model.
description: talk presented at DPF2004 meeting in Riverside, CA; to appear in a supplement in International Journal of Modern Physics A
A mezőgazdaság műszaki fejlesztésének lehetséges megoldása
Creators: name: Fenyvesi, László
name: Gockler, Lajos
name: Hajdú, József
name: Husti, István
name: Fenyvesi, László
name: Gockler, Lajos
name: Hajdú, József
name: Husti, István
Publisher: name: Unknown
Year: 2003
Subjects: Research and Development/Tech Change/Emerging Technologies

description: Az Európai Unió piacán az innovációt versenyképesen alkalmazó termeléssel vehet részt a magyar mezőgazdaság. A tanulmány a piaci szempontoknak elsőbbséget adó termelésfejlesztés elvi alapjait mutatja be, kitérve a megvalósítás lehetőségeire is. A tanulmányban a rendszer-szemlélet dominál. A mezőgazdasági rendszerek eredményes működéséhez korszerű inputokra, rugalmasan használható technológiai megoldásokra és mindezeket ésszerűen megvalósító szakértelemre valamint eszközökre van szükség. Mivel a feltételek oldaláról a gépesítésben meglévő elmaradás jelenti a szűk keresztmetszetet, ezért a tanulmány kissé részletesebben elemzi az e területen jelentkező feladatokat. ------------ Hungarian agriculture will only be capable of being effective on the market of the European Union if it produces in a competitive and innovative way. The basic principles of a production development where marketing aspects have a priority, along with the possibilities of their implementation, are described in the present paper, in which the systemic approach is dominating. Up-to-date input, flexible technological solutions, and skills and tools for their reasonable implementation are required in order to run agricultural systems in an effective way. Since the lag in mechanisation constitutes the bottle-neck among conditions tasks in this field are analysed in a somewhat more detailed way.
Parametrizing nilpotent orbits via Bruhat-Tits theory
Creators: name: DeBacker, Stephen
Publisher: name: arXiv
Year: 2004
Subjects: subject: Group Theory (math.GR)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 20G25 (primary) 17B45, 20G15, 22E50 (secondary)

description: Let $k$ denote a field with nontrivial discrete valuation. We assume that $k$ is complete with perfect residue field. Let $G$ be the group of $k$-rational points of a reductive, linear algebraic group defined over $k$. Let $\gg$ denote the Lie algebra of $G$. Fix $r \in \R$. Subject to some restrictions, we show that the set of distinguished degenerate Moy-Prasad cosets of depth $r$ (up to an equivalence relation) parametrizes the nilpotent orbits in $\gg$.
description: 38 pages published version
Diffusion of optical pulses in dispersion-shifted randomly birefringent optical fibers
Creators: name: Lushnikov, Pavel M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: An effect of polarization-mode dispersion, nonlinearity and random variation of dispersion along an optical fiber on a pulse propagation in a randomly birefringent dispersion-shifted optical fiber with zero average dispersion is studied. An averaged pulse width is shown analytically to diffuse with propagation distance for arbitrary strong pulse amplitude. It is found that optical fiber nonlinearity can not change qualitatively a diffusion of pulse width but can only modify a diffusion law which means that a root mean square pulse width grows at least as a linear function of the propagation distance.
description: 11 pages, submitted to Optics Communications
Two-magnon frequency-pulling effect in ferromagnetic resonance
Creators: name: Peria, W. K.
name: Yu, H.
name: Lee, S.
name: Takeuchi, I.
name: Crowell, P. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the experimental observation in thin films of the hybridization of the uniform ferromagnetic resonance mode with nonuniform magnons as a result of the two-magnon scattering mechanism, leading to a frequency-pulling effect on the ferromagnetic resonance. This effect, when not properly accounted for, leads to a discrepancy in the dependence of the ferromagnetic resonance field on frequency for different field orientations. The frequency-pulling effect is the complement of the broadening of the ferromagnetic resonance lineshape by two-magnon scattering and can be calculated using the same parameters. By accounting for the two-magnon frequency shifts through these means, consistency is achieved in fitting data from in-plane and perpendicular-to-plane resonance conditions.
description: 4 pages, 4 figures
Additional file 2 of Can consumer wearable activity tracker-based interventions improve physical activity and cardiometabolic health in patients with chronic diseases? A systematic review and meta-analysis of randomised controlled trials
Creators: name: Franssen, Wouter M. A.
name: Franssen, Gregor H. L. M.
name: Spaas, Jan
name: Solmi, Francesca
name: Eijnde, Bert O.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Marine Biology
subject: Science Policy

description: Additional file 2: Appendix II Data extraction form.
Fluctuations of conserved charges, chiral spin symmetry and deconfinement in an SU(2)_color subgroup of SU(3)_color above T_c
Creators: name: Glozman, L. Ya.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Above a pseudocritical temperature of chiral symmetry restoration T_c the energy and the pressure are very far from the quark-gluon-plasma limit (i.e. ideal gas of free quarks and gluons). At the same time very soon above T_c fluctuations of conserved charges behave as if quarks were free particles. Within the T_c - 3T_c interval a chiral spin symmetry emerges in QCD which is not consistent with free quarks and suggests that degrees of freedom are chirally symmetric quarks bound into the color-singlet objects by the chromoelectric field. Here we analyse temporal and spatial correlators in this interval and demonstrate that they indicate simultaneously the chiral spin symmetry as well as absence of the interquark interactions in channels constrained by a current conservation. The latter channels are responsible for both fluctuations of conserved charges and for dileptons. Assuming that a SU(2)_color subgroup of SU(3)_color is deconfined soon above T_c but confinement persits in SU(3)_color/SU(2)_color in the interval T_c - 3T_c we are able to reconcile all empirical facts listed above.
description: 10 pages; Final version; accepted by PRD
Shot-noise and conductance measurements of transparent superconductor / two-dimensional electron gas junctions
Creators: name: Choi, B. -R.
name: Hansen, A. E.
name: Kontos, T.
name: Hoffmann, C.
name: Oberholzer, S.
name: Belzig, W.
name: Schoenenberger, C.
name: Akazaki, T.
name: Takayanagi, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have measured the conductance and shot-noise of superconductor-normal metal (S-N) junctions between a Niobium (Nb) film and a 2-dimensional electron gas (2DEG), formed in an InAs-based semiconductor heterostructure. Adjacent to the junction, the 2DEG is shaped into a submicrometer beam-splitter. The current shot-noise measured through one arm of the beam-splitter is found to be enhanced due to Andreev reflection. Both noise and conductance measurements indicate that the Nb-2DEG interface is of high quality with a transparency approaching approx. 60-70 %. The present device can be seen as a quasi-ballistic S-N beam-splitter junction.
description: full paper including figures can be retrieved from: http://www.unibas.ch/phys-meso/Research/Papers/2004/Shot-Noise-Yjunction.pdf
Területfejlesztési célok és megvalósulásuk
Creators: name: Késmárki Galli, Szilvia
name: Késmárki Galli, Szilvia
Publisher: name: Unknown
Year: 2003
Subjects: Agricultural Finance
Community/Rural/Urban Development
Public Economics

description: A kilencvenes éveket mindenekelőtt a munkanélküliség és a gazdasági megújulás elemei, elsősorban a külföldi tőkebefektetések regionálisan szembefeszülő mozgásai jellemzik. Felerősödtek a területi egyenlőtlenségek. A területfejlesztés átfogó célja, hogy létrejöjjenek a területileg kiegyensúlyozott fejlődés feltételei. A területfejlesztésről és a területrendezésről szóló 1996. évi XXL. törvényben megfogalmazott célok megvalósításához a legfontosabb decentralizált pénzügyi források: • A területfejlesztési (vidékfejlesztési) célelőirányzat (TFC). • A területi kiegyenlítést szolgáló fejlesztési célú támogatás (TEKI). • A céljellegű decentralizált támogatás (CÉDE). A területfejlesztési célelőirányzat támogatások rendelkezésre álló kerete és a támogatási igény sem egyezik egészen napjainkig. A támogatásokat főként az infrastrukturális és a munkahelyteremtő beruházások támogatására ítélték oda. Az önkormányzatok költségvetései meglehetősen feszítettek, már a kötelező alapfeladatok ellátásában is forráshiánnyal küszködnek (különösen az elmaradott térségekben). Meg kell állapítani, hogy az igények többszörösen - kétszeresen, háromszorosan - meghaladják a rendelkezésre álló pénzeszközök összegét. --------------- Unemployment and some elements of economic renewal, firstly the regionally antagonistic movements of foreign capital investments, were mainly characteristic of the nineties in Hungary. As a result, the differences between the regions have become bigger. The comprehensive objective of the development of regions is to create the prerequisites of equilibrium among them. The main decentralised financial resources of the realisation of the objectives laid down in the 1996/21 Act on regional development and country planning are the following: • Special regional (rural) development allowance • Development support serving for the creation of equilibrium among the regions • Special decentralised support There is still no complete congruence between the available amount of the special support actually allocated for regional development, on the one hand, and the amount required, on the other. Support was mainly allocated for investments into infrastructure and job generation. Local budgets have problems, and they are already hardly enough even for fulfilling the basic tasks of local governments (especially in backward regions). It has to be stated that demand is several times (twice or even three times) bigger than the available financial resources.
Oroszország és Magyarország agrár-külkereskedelme
Creators: name: Kőnig, Gábor
name: Kőnig, Gábor
Publisher: name: Unknown
Year: 2003
Subjects: International Relations/Trade

description: Oroszország a krízisen túljutott, a belső piaca helyreállt, versenyképessége javult, szerény, de határozott importnövekedés is ezt bizonyítja. Oroszország a közeljövőben, komolyabb élelmiszersegélyben nem kell, hogy részesüljön, így a továbbiakban hazánknak azon piaci szegmensek (pl. hús, gabona, zöldség, gyümölcs) visszahódítására kellene koncentrálnia, amelyeket a válság idején versenytársaink megszereztek. Nagy előrelépés lenne újbóli megjelenésünk a jövőben is nagy lehetőségeket kínáló orosz piacon. -------------- Russia has got beyond its crisis, its domestic market has recovered, and its competitiveness has slightly improved as indicated by a modest but definite increase in imports. There will be no need in any major food aid for Russia in the near future. Therefore Hungary has to focus on regaining market segments (e. g. meat, grain, vegetables, fruit) it has lost during the crisis in favour of its competitors. The renewed entry of Hungary into the Russian market, which will be very promising also in the future, would be a great success.
Additional file 4 of Optimized breeding strategies to harness genetic resources with different performance levels
Creators: name: Allier, Antoine
name: Teyssèdre, Simon
name: Lehermeier, Christina
name: Moreau, Laurence
name: Charcosset, Alain
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 4:Supplementary Figures contain the supplemental Figure S1. (Evolution of the additive genetic variance intra- and inter-family components in the breeding population); Figure S2. (Summary statistics on the introduction crosses); Figure S3. (Effect of TS composition on intra-family prediction accuracies); Figure S4. (Evolution of the breeding population over generations for two different weightings α).
Seeding Approach to Bubble Nucleation in Superheated Lennard Jones Fluids
Creators: name: Rosales-Pelaez, Pablo
name: Garcia-Cid, Marta Irene
name: Valeriani, Chantal
name: Vega, Carlos
name: Sanz, Eduardo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate vapor homogeneous nucleation in a superheated Lennard Jones liquid with computer simulations. Special simulation techniques are required to address this study since the nucleation of a critical vapor bubble --one that has equal chance to grow or shrink-- in a moderately superheated liquid is a rare event. We use the Seeding method, that combines Classical Nucleation Theory with computer simulations of a liquid containing a vapor bubble to provide bubble nucleation rates in a wide temperature range. Seeding has been successfully applied to investigate the nucleation of crystals in supercooled fluids and here we apply it for the fist time --to the best of our knowledge-- to the liquid-to-vapor transition. We find that Seeding provides nucleation rates that are consistent with independent calculations not based on the assumptions of Classical Nucleation Theory. Different criteria to determine the radius of the critical bubble give different rate values. The accuracy of each criterion depends of the degree of superheating. Moreover, Seeding simulations show that the surface tension depends on pressure for a given temperature. Therefore, using Classical Nucleation Theory with the coexistence surface tension does not provide good estimates of the nucleation rate.
description: paper
Strong hypercontractivity in non-commutative holomorphic spaces
Creators: name: Kemp, Todd
Publisher: name: arXiv
Year: 2004
Subjects: subject: Operator Algebras (math.OA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We introduce holomorphic algebras $H_q$ in the context of the q-Gaussian algebra $Γ_q$ of Bozejko, Kümmerer, and Speicher, and give a q-Segal-Bargmann transform for them. We then prove a strong hypercontractivity theorem, generalizing Janson's strong (holomorphic) hypercontractivity, from $L^2(H_q) \to L^r(H_q)$ for r an even integer.
description: 25 pages, uses package xy
Hazánk inflációs kilátásai az EU-csatlakozást követően
Creators: name: Hajmási, Gábor
name: Hajmási, Gábor
Publisher: name: Unknown
Year: 2003
Subjects: Financial Economics
International Relations/Trade

description: Hazánk EU csatlakozása több területen befolyásolja a magyar gazdaságot^ melyek közül egyik az infláció. A spanyol és a portugál csatlakozás utáni eseményeket vizsgálva elmondható, hogy az inflációs trendekben valószínűleg nem következik be radikális változás Magyarországon, mint ahogy a két ibériai állam esetében sem történt, de az áremelkedés ütemének csökkenése tovább folyik. Ez azonban nem jelenti azt, hogy hamarosan elérjük a nyugat-európai értékeket, a különféle okok miatt hosszú távon is fennmarad egy bizonyos különbség a magyar és az európai infláció között. Ha a mezőgazdaság termékek árait vizsgáljuk szintén erre a következtetésre juthatunk, azonban hozzá kell tenni, az agrárárak változásának egyik fontos tulajdonsága, hogy az árak a csatlakozás után egyre inkább kiszámíthatóbbak lesznek, a jelentős ingadozásokat megakadályozza a növekvő európai közös piac. A spanyol és portugál folyamatok tanulságai is ezt támasztják alá. -------------- The entry into the European Union will affect the economy of Hungary in several respects. One of the most important problems is inflation. Fortunately the trends in this field can be forecast on the basis of an analysis of the period when Portugal and Spain entered into the European Union. Their figures indicate that there will be no significant change in the present trend of inflation in Hungary either, i. e. it will continue to decrease also in the near future. This does not mean, however, that inflation in this country will be in the neighbourhood of the analogous European figures: some difference between the first and the second will exist for a long period of time. The analysis of the prices of agricultural products permits of making the same conclusion also in that field. The trends of their changes will be more predictable, and any shocking changes will possibly disappear when the agricultural market of Hungary becomes part of that of Europe.
A tervezés helyzete és fejlesztésének lehetőségei a mezőgazdasági vállalatokban
Creators: name: Túróczi, Imre
name: Túróczi, Imre
Publisher: name: Unknown
Year: 2003
Subjects: Farm Management
Institutional and Behavioral Economics

description: Megállapítható, hogy a magyar mezőgazdaság termelő szervezeteinek túlnyomó részét kitevő 0-9 főt foglalkoztató gazdaságok esetében a vezetők jelentős része nem rendelkezik megfelelő szintű szakmai végzettséggel. Tervezési munkájuk lényegében csak a likviditás biztosítására irányul. Komoly gondot okoz, hogy a számviteli ismereteken alapuló, a magyar banki gyakorlatban ismert üzleti tervet túlságosan bonyolultnak tartják, és az számukra kevés használható információt nyújt. Kedvező a fogadtatása egy leegyszerűsített üzleti terv sémának, amely könnyen kezelhető és közérthetőbb, mint a pénzintézeti séma. A megkérdezett 277 vállalkozásból 225-en (81,3%) nyilatkoztak úgy, hogy az egyszerűbb üzleti tervet szívesen elkészítik, vagyis erre igény mutatkozik. Célszerűnek tűnik a javasolt tervezési eljárás gyakorlatban való elterjesztése. ------------- It can be stated that in farms employing 1-9 people, which constitute the majority of producing units in Hungarian agriculture, most managers have no satisfactory professional education. Their planning activities actually ensure only the liquidity of their farms. It is a major problem that they consider business plans commonplace in Hungarian banking practice, which are based on the knowledge of accountancy, too complicated and providing little useful information for them. However, they would welcome a simplified business plan scheme easier to understand and to deal with than the banking scheme. 225 of the 277 farmers questioned, i. e. 81.3 per cent, declared to be willing to make a simplified business plan. In other words, there is a need of such a plan. It seems expedient to bring the planning procedure suggested by the author into general use in practice.
Heavy Mesons and Impact Ionization of Heavy Quarkonia
Creators: name: Blaschke, D.
name: Kalinovsky, Yu.
name: Yudichev, V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: At the chiral restoration/deconfinement transition, most hadrons undergo a Mott transition from being bound states in the confined phase to resonances in the deconfined phase. We investigate the consequences of this qualitative change in the hadron spectrum on final state interactions of charmonium in hot and dense matter, and show that the Mott effect for D-mesons leads to a critical enhancement of the J/$ψ$ dissociation rate. Anomalous J/psi suppression in the NA50 experiment is discussed as well as the role of the Mott effect for the heavy flavor kinetics in future experiments at the LHC. The status of our calculations of heavy quarkonium dissociation cross sections due to quark and gluon impact is reviewed, and estimates for in-medium effects due to the lowering of the ionisation threshold are given.
description: 10 pages, 7 figures
Takarékszövetkezetek szolgáltatási színvonala egy primer kutatás tükrében
Creators: name: Tamus, Antalné
name: Felföldi, Melinda
name: Tamus, Antalné
name: Felföldi, Melinda
Publisher: name: Unknown
Year: 2003
Subjects: subject: Institutional and Behavioral Economics
subject: Marketing
subject: FOS: Economics and business

description: Az ügyfél-elégedettség a vállalat hosszú távú jövedelmező működésének egyik kulcstényezője. Az elégedettség kialakulását az ügyfélnek megfelelő színvonalú szolgáltatás létrehozásával lehet megalapozni. Napjaink igen erős piaci versenyében a szolgáltatóknak - a pénzügyi szférában is - arra kell törekedniük, hogy magas minőségi színvonalú kiszolgálással tartsák meg ügyfeleiket. Ehhez szükséges a szolgáltatási színvonal figyelemmel kísérése, folyamatos marketingkutatások alkalmazása, mind a saját mind a konkurencia szolgáltatásminősége vonatkozásában. Ezen kutatási terület ma még nem kap kellő hangsúlyt a pénzintézetek tevékenységében, így tanulmányunkban - a hazai gyakorlatban még új, kevésbé alkalmazott - módszerek bemutatására vállalkozunk két takarékszövetkezet szolgáltatásminőségét vizsgálva. Kutatásunk során három eljárást alkalmaztunk, így az imázsprofll elemzést, a Servqual és a mystery shopping módszert. ------------- The satisfaction of the clientele is one of the key factors of the profitable operation of any enterprise in the long term. Satisfaction can be established by means of creating services suitable for the clients. At present, when competition on the market is very acute, service enterprises (including financial ones) have to endeavour to keep their clients by means of serving them on a high level. For this end they must monitor the level of services of both themselves and their competitors, and continually carry out marketing investigations in respect of their quality. However, this field of research is not yet duly emphasised in the everyday practice of financial institutions. This is the reason why the present paper describes some methods new, and not yet duly employed in Hungarian practice, on the basis of the quality of services provided by two cooperative savings banks. Three methods of investigation were used: the image profile analysis, the Servqual method, and the mystery shopping method.