cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On electron-positron pair production using a two level on resonant multiphoton approximation
Creators: name: Tsohantjis, I.
name: Moustaizis, S.
name: Ploumistakis, I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present an indepth investigation of certain aspects of the two level on resonant multiphoton approximation to pair production from vacuum in the presence of strong electromagnetic fields. Numerical computations strongly suggest that a viable experimental verification of this approach using modern optical laser technology can be achieved. It is shown that use of higher harmonic within the presently available range of laser intensities can lead to multiphoton processes offering up to 10^12 pairs per laser shot. Finally the range of applicability of this approximation is examined from the point of view of admissible values of electric field strength and energy spectrum of the created pairs.
description: 10 pages, 5 figures
Digitizing Handwriting with a Sensor Pen: A Writer-Independent Recognizer
Creators: name: Wehbi, Mohamad
name: Hamann, Tim
name: Barth, Jens
name: Eskofier, Bjoern
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Online handwriting recognition has been studied for a long time with only few practicable results when writing on normal paper. Previous approaches using sensor-based devices encountered problems that limited the usage of the developed systems in real-world applications. This paper presents a writer-independent system that recognizes characters written on plain paper with the use of a sensor-equipped pen. This system is applicable in real-world applications and requires no user-specific training for recognition. The pen provides linear acceleration, angular velocity, magnetic field, and force applied by the user, and acts as a digitizer that transforms the analogue signals of the sensors into timeseries data while writing on regular paper. The dataset we collected with this pen consists of Latin lower-case and upper-case alphabets. We present the results of a convolutional neural network model for letter classification and show that this approach is practical and achieves promising results for writer-independent character recognition. This work aims at providing a realtime handwriting recognition system to be used for writing on normal paper.
description: Published in 2020 17th International Conference on Frontiers in Handwriting Recognition (ICFHR)
Inversion Formulas for the Dunkl Intertwining Operator and Its Dual on Spaces of Functions and Distributions
Creators: name: Trimèche, Khalifa
Publisher: name: arXiv
Year: 2008
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: In this paper we prove inversion formulas for the Dunkl intertwining operator $V_k$ and for its dual ${}^tV_k$ and we deduce the expression of the representing distributions of the inverse operators $V_k^{-1}$ and ${}^tV_k^{-1}$, and we give some applications.
description: This is a contribution to the Special Issue on Dunkl Operators and Related Topics, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Orthopositronium lifetime: analytic results in O(alpha) and O(alpha^3 ln(alpha))
Creators: name: Kniehl, Bernd A.
name: Kotikov, Anatoly V.
name: Veretin, Oleg L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the O(alpha) and O(alpha^3 ln(alpha)) corrections to the total decay width of orthopositronium in closed analytic form, in terms of basic transcendental numbers, which can be evaluated numerically to arbitrary precision.
description: 9 pages, 1 figure
Current status of CARLOMAT, a program for automatic computation of lowest order cross sections
Creators: name: Kolodziej, Karol
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The current status of CARLOMAT, a program for automatic computation of the lowest order cross sections of multiparticle reactions is described, the results of comparisons with other multipurpose Monte Carlo programs are shown and some new results on e+e- -> b anti-b b anti-b u anti-d d anti-u are presented.
description: 6 pages, LaTeX, 3 postscript figures, to appear in proceedings of the "9th Workshop on Elementary Particle Theory: Loops and Legs in Quantum Field Theory", Sondershausen, Germany, April 20-25, 2008
Tunable Graphene System with Two Decoupled Monolayers
Creators: name: Schmidt, H.
name: Luedtke, T.
name: Barthold, P.
name: McCann, E.
name: Falko, V. I.
name: Haug, R. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The use of two truly two-dimensional gapless semiconductors, monolayer and bilayer graphene, as current-carrying components in field-effect transistors (FET) gives access to new types of nanoelectronic devices. Here, we report on the development of graphene-based FETs containing two decoupled graphene monolayers manufactured from a single one folded during the exfoliation process. The transport characteristics of these newly-developed devices differ markedly from those manufactured from a single-crystal bilayer. By analyzing Shubnikov-de Haas oscillations, we demonstrate the possibility to independently control the carrier densities in both layers using top and bottom gates, despite there being only a nano-meter scale separation between them.
description: 4 Pages, 4 Fugures
Medienpädagogik und die Weiterentwicklung aktueller Curricula für die Primarstufenausbildung
Creators: name: Kulcke, Gesine
Publisher: name: Medienimpulse
Year: 2015

description: Medienimpulse, Bd. 53 Nr. 4 (2015): 4/2015 - Medienbildung im Kontext der "PädagogInnenbildung NEU"/Teil 2
Dust processing in photodissociation regions - Mid-IR emission modelling
Creators: name: Compiegne, M.
name: Abergel, A.
name: Verstraete, L.
name: Habart, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Mid-infrared spectroscopy of dense illuminated ridges (or photodissociation regions, PDRs) suggests dust evolution. Such evolution must be reflected in the gas physical properties through processes like photo-electric heating or H_2 formation. With Spitzer Infrared Spectrograph (IRS) and ISOCAM data, we study the mid-IR emission of closeby, well known PDRs. Focusing on the band and continuum dust emissions, we follow their relative contributions and analyze their variations in terms of abundance of dust populations. In order to disentangle dust evolution and excitation effects, we use a dust emission model that we couple to radiative transfer. Our dust model reproduces extinction and emission of the standard interstellar medium that we represent with diffuse high galactic latitude clouds called Cirrus. We take the properties of dust in Cirrus as a reference to which we compare the dust emission from more excited regions, namely the Horsehead and the reflection nebula NGC 2023 North. We show that in both regions, radiative transfer effects cannot account for the observed spectral variations. We interpret these variations in term of changes of the relative abundance between polycyclic aromatic hydrocarbons (PAHs, mid-IR band carriers) and very small grains (VSGs, mid-IR continuum carriers). We conclude that the PAH/VSG abundance ratio is 2.4 times smaller at the peak emission of the Horsehead nebula than in the Cirrus case. For NGC2023 North where spectral evolution is observed across the northern PDR, we conclude that this ratio is ~5 times lower in the dense, cold zones of the PDR than in its diffuse illuminated part where dust properties seem to be the same as in Cirrus. We conclude that dust in PDRs seems to evolve from "dense" to "diffuse" properties at the small spatial scale of the dense illuminated ridge.
description: 11 pages, 11 figures, accepted for publication in A&A
Crossover Between Organized and Disorganized States In Some Non-Equilibrium Systems
Creators: name: Gonzalez, D. L.
name: Tellez, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study numerically the crossover between organized and disorganized states of three non-equilibrium systems: the Poisson/coalesce random walk (PCRW), a one-dimensional spin system and a quasi one-dimensional lattice gas. In all cases, we describe this crossover in terms of the average spacing between particles/domain borders $< S(t) >$ and the spacing distribution functions $p^{(n)}(s)$. The nature of the crossover is not the same for all systems, however, we found that for all systems the nearest neighbor distribution $p^{(0)}(s)$ is well fitted by the Berry-Robnik model. The destruction of the level repulsion in the crossover between organized an disorganized states is present in all systems. Additionally, we found that the correlations between domains in the gas and spin systems are not strong and can be neglected in a first approximation but for the PCRW the correlations between particles must be taken into account. To find $p^{(n)}(s)$ with $n>1$, we propose two different analytical models based on the Berry-Robnik model. Our models give us a good approximation for the statistical behavior of these systems in their crossover and allow us to quantify the degree of order/disorder of the system.
description: 31 pages, 14 figures
Wie "zukunftsreich" ist das neue Lehramtsstudium?
Creators: name: Himpsl-Gutermann, Klaus
name: Berger, Elfriede
name: Harrich, Peter
name: Kohl, Angela
name: Maurek, Johannes
name: Nárosy, Thomas
name: Peböck, Karl
name: Tetz, Manfred
name: Teufel, Martin
name: Walden, Thomas
name: Winklehner, Elisabeth
Publisher: name: Medienimpulse
Year: 2016

description: Durch die PädagogInnenbildung_NEU eröffnet sich derzeit die Chance, österreichweit in vier Verbundregionen in Kooperation zwischen Universitäten und Pädagogischen Hochschulen die Lehramtsausbildung für alle Schulstufen und Schultypen zukunftsweisend zu reformieren. Zu den Ansprüchen an das neue Studium gehört auch, dass es künftige LehrerInnen an die Schulen entsendet, die neben ihrer fachlichen Expertise mit aktuellen gesellschaftlichen Herausforderungen und Entwicklungen adäquat umgehen können. Die rasant voranschreitende Technologisierung und Digitalisierung unserer Gesellschaft gehört zweifelsohne zu diesen Herausforderungen. Die E-Learning-Strategiegruppe der österreichischen Pädagogischen Hochschulen (PHELS) hat deshalb die aktuell vorliegenden Curricula und Curriculaentwürfe der Sekundarstufe Allgemeinbildung in den vier Verbundregionen einer kritischen Analyse hinsichtlich Medienbildung und digitaler Kompetenzen unterzogen − mit einem ernüchternden bis verheerenden Ergebnis: Es scheint nicht nur die historische Chance vertan, Medienbildung systematisch in der LehrerInnenausbildung und damit in den Schulen zu verankern, sondern durch die fehlende informatische Grundbildung laufen künftige Generationen auch Gefahr, auf zunehmend digitalisierten Arbeitsmärkten den internationalen Anschluss zu verlieren.
description: Medienimpulse, Bd. 53 Nr. 4 (2015): 4/2015 - Medienbildung im Kontext der "PädagogInnenbildung NEU"/Teil 2
Opcion National Survey: Uruguay March 2019
Creators: name: Opción Consultores, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Interest in politics; 2019 general election; vote for or against parties; National Party; Frente Amplio (a leftist political coalition); Colorado Party; Independent Party; People's Party; Unidad Popular (a left-wing political coalition); party primaries; military policing; President Tabaré Vázquez job approval; confidence in the opposition's party ability to govern; likeability of candidates and political leaders; Luis Lacalle Pou (National Party); Daniel Martínez (Frente Amplio); Jorge Larrañaga (National Party); Pablo Mieres (Independent Party); Carolina Cosse (Frente Amplio); Ernesto Talvi (Colorado Party); Edgardo Novick (People's Party); José Amorín Batlle (Colorado Party); Julio Marí a Sanguinetti (Colorado Party); Mario Bergara (Fronte Amplio); Enrique Antía (National Party); Oscar Andrade (Frente Amplio); Juan Sartori (National Party); Veronica Alonso (Frente Amplio); country's principle problem; poverty/low wages/unemployment; government spending; corruption; crime; education; the economy; personal economic situation; desire for radical vs. gradual changes in new government; increase/reduce governements's role; reduce the number of public officials; 2014 general election. Montevideo: Intendant Daniel Martínez job approval. National Agency for Research and Innovation (ANII) Collection.
Opcion National Survey: Uruguay December 2018
Creators: name: Opción Consultores, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Interest in politics; 2019 general election; vote for or against parties; National Party; Frente Amplio (a leftist political coalition); Colorado Party; Independent Party; People's Party; Unidad Popular (a left-wing political coalition); President Tabaré Vázquez job approval; confidence in the opposition's party ability to govern; likeability of candidates and political leaders; Luis Lacalle Pou (National Party); Daniel Martínez (Frente Amplio); Jorge Larrañaga (National Party); Pablo Mieres (Independent Party); Carolina Cosse (Frente Amplio); Ernesto Talvi (Colorado Party); Edgardo Novick (People's Party); José Amorín Batlle (Colorado Party); Julio Marí a Sanguinetti (Colorado Party); Mario Bergara (Fronte Amplio); Enrique Antía (National Party); Oscar Andrade (Frente Amplio); Veronica Alonso (Frente Amplio); obligatory debates; the economy; personal economic situation; drinking and driving; 2014 general election. National Agency for Research and Innovation (ANII) Collection.
Medien im Lehramtsstudium für die Sekundarstufe in Österreich.
Creators: name: Swertz, Christian
Publisher: name: Medienimpulse
Year: 2016

description: Medien sind für Erziehung und Unterricht notwendig sowie im Alltag, in der Politik und der Ökonomie relevant. Daher ist zu erwarten, dass Medien in den Curricula für die Lehramtsausbildung im Sekundarbereich vorkommen. Ob diese Erwartung zutrifft, wird an vier Curricula für den Sekundarbereich mit einem quantitativen inhaltsanalytischen Verfahren untersucht. Die Ergebnisse zeigen, dass Medien im Allgemeinen und Medienpädagogik, Medienkompetenz und Mediendidaktik im Besonderen nur selten vorkommen und die meisten der seltenen Vorkommnisse irrelevant sind.
description: Medienimpulse, Bd. 53 Nr. 4 (2015): 4/2015 - Medienbildung im Kontext der "PädagogInnenbildung NEU"/Teil 2
title: La perfezione matematica
Creators: name: De Felice, Federica
Publisher: name: Max-Planck-Gesellschaft zur Förderung der Wissenschaften
Year: 2020

description: Proposizione
Spiegazione della proposizione
Corollario
Corollario
Corollario
Corollario
Corollario
Corollario
Corollario
Proposizione
Note a piè pagina
Die Urheberrechtsnovelle vom 01.10.2015 bringt für Schulen einige Klarstellungen
Creators: name: Guettl-Strahlhofer, Angelika
name: Olensky, Walter
Publisher: name: Medienimpulse
Year: 2016

description: Medienimpulse, Bd. 53 Nr. 4 (2015): 4/2015 - Medienbildung im Kontext der "PädagogInnenbildung NEU"/Teil 2
WMAP 5-year constraints on time variation of $α$ and $m_e$ in a detailed recombination scenario
Creators: name: Scóccola, Claudia G.
name: Landau, Susana. J.
name: Vucetich, Hector
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the role of fundamental constants in an updated recombination scenario. We focus on the time variation of the fine structure constant, and the electron mass in the early Universe, and put bounds on these quantities by using data from CMB including WMAP 5-yr release and the 2dFGRS power spectrum. We analyze how the constraints are modified when changing the recombination scenario.
description: 11 pages, accepted for publication in Physics Letters B
The SDSS DR6 Luminosity Functions of Galaxies
Creators: name: Montero-Dorta, Antonio D.
name: Prada, Francisco
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present number counts, luminosity functions (LFs) and luminosity densities of galaxies obtained using the Sloan Digital Sky Survey Sixth Data Release in all SDSS photometric bands. Thanks to the SDSS DR6, galaxy statistics have increased by a factor of ~9 in the u-band and by a factor of ~4-5 in the rest of the SDSS bands with respect to the previous work of Blanton et al. (2003b). In addition, we have achieved a high redshift completeness in our galaxy samples. Firstly, by making use of the survey masks, provided by the NYU-VAGC DR6, we have been able to define an area on the sky of high angular redshift completeness. Secondly, we guarantee that brightness-dependent redshift incompleteness is small within the magnitude ranges that define our galaxy samples. With these advances, we have estimated very accurate SDSS DR6 LFs in both the bright and the faint end. In the {0.1}^r-band, our SDSS DR6 luminosity function is well fitted by a Schechter LF with parameters Phi_{*}=0.90 +/- 0.07$, M_{*}-5log_{10}h=-20.73 +/- 0.04 and alpha=-1.23 +/- 0.02. As compared with previous results, we find some notable differences. In the bright end of the {0.1}^u-band luminosity function we find a remarkable excess, of ~1.7 dex at M_{{0.1}^u}=-20.5, with respect to the best-fit Schechter LF. This excess weakens in the {0.1}^g-band, fading away towards the very red {0.1}^z-band. A preliminary analysis on the nature of this bright-end bump reveals that it is mostly comprised of active galaxies and QSOs. It seems, therefore, that an important fraction of this exceeding luminosity may come from nuclear activity. In the faint end of the SDSS DR6 luminosity functions, where we can reach 1-1.5 magnitudes deeper than the previous SDSS LF estimation, we obtain a steeper slope [ABRIDGED].
description: 11 pages including 10 figures. To be submitted to MNRAS
Ectoedemia (Ectoedemia) atricollis
Creators: name: van Nieukerken, Erik
name: Laštůvka, Aleš
name: Laštůvka, Zdeněk
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Nepticulidae
Ectoedemia
Ectoedemia atricollis

description: Ectoedemia (Ectoedemia) atricollis (Stainton) Biology. Hostplants: oligophagous on Rosaceae: Maloideae (Crataegus spp., Malus sylvestris Mill., Pyrus communis L., Mespilus germanica L., Prunus avium L., P. mahaleb L., P. cerasifera Ehrh.) and Staphylaea pinnata L. (Staphylaeaceae). Larvae from August to October, adults in June-July. Distribution. Norway: Aarvik et al. 2004; Latvia: Savenkov 1989; Lithuania: Ivinskis et al. 1985; Bulgaria: Tomov and Pelov 1998; Russia: Van Nieukerken et al. 2004b. The species occurs in Tadzhikistan, probably as an introduction (Puplesis 1994).
description: Published as part of van Nieukerken, Erik, Laštůvka, Aleš & Laštůvka, Zdeněk, 2010, Western Palaearctic Ectoedemia (Zimmermannia) Hering and Ectoedemia Busck s. str. (Lepidoptera: Nepticulidae): five new species and new data on distribution, hostplants and recognition, pp. 1-82 in ZooKeys 32 (32) on page 69, DOI: 10.3897/zookeys.32.282, http://zenodo.org/record/576594
description: {"references": ["Aarvik L, Berggren K, Bakke SA (2004) Nye funn av sommerfugler i Norge 4. Insekt-Nytt 29: 37 - 66.", "Savenkov NV (1989) O novykh i redkikh vidakh cheshuekrylykh fauny Latvii. About new and rare Lepidoptera species in the fauna of Latvia. Latvijas Entomologs 32: 86 - 91.", "Ivinskis P, Pakalniskis S, Puplesis R (1985) Augalus Minuojantys Vabzdziai [Leafmining insects]. Mokslas, Vilnius, 1 - 240 pp.", "Tomov R, Pelov V (1998) List of leaf miners (Lepidoptera), feeding on Rosaceous fruit trees and their hosts in Bulgaria. Acta Entomologica Bulgarica 4: 19 - 24.", "Nieukerken EJ van, Zolotuhin VV, Mistchenko A (2004 b) Nepticulidae from the Volga and Ural region. Nota Lepidopterologica 27: 125 - 157. http: // www. repository. naturalis. nl / record / 227761.", "Puplesis R (1994) Th e Nepticulidae of eastern Europe and Asia. Western, central and eastern parts. Backhuys Publishers, Leiden, 290 pp."]}
Fingerprints of ordered self-assembled structures in the liquid phase of a hard-core, square-shoulder system
Creators: name: Wassermair, Michael
name: Kahl, Gerhard
name: Roth, Roland
name: Archer, Andrew J.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the phase ordering (pattern formation) of systems of two-dimensional core-shell particles using Monte-Carlo (MC) computer simulations and classical density functional theory (DFT). The particles interact via a pair potential having a hard core and a repulsive square shoulder. Our simulations show that on cooling, the liquid state structure becomes increasingly characterised by long wavelength density modulations, and on further cooling forms a variety of other phases, including clustered, striped and other patterned phases. In DFT, the hard core part of the potential is treated using either fundamental measure theory or a simple local density approximation, whereas the soft shoulder is treated using the random phase approximation. The different DFTs are bench-marked using large-scale grand-canonical-MC and Gibbs-ensemble-MC simulations, demonstrating their predictive capabilities and shortcomings. We find that having the liquid state static structure factor $S(k)$ for wavenumber $k$ is sufficient to identify the Fourier modes governing both the liquid and solid phases. This allows to identify from easier-to-obtain liquid state data the wavenumbers relevant to the periodic phases and to predict roughly where in the phase diagram these patterned phases arise.
description: 42 pages, 9 figures
Unstable Gravitino Dark Matter and Neutrino Flux
Creators: name: Covi, Laura
name: Grefe, Michael
name: Ibarra, Alejandro
name: Tran, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The gravitino is a promising supersymmetric dark matter candidate which does not require exact R-parity conservation. In fact, even with some small R-parity breaking, gravitinos are sufficiently long-lived to constitute the dark matter of the Universe, while yielding a cosmological scenario consistent with primordial nucleosynthesis and the high reheating temperature required for thermal leptogenesis. In this paper, we compute the neutrino flux from direct gravitino decay and gauge boson fragmentation in a simple scenario with bilinear R-parity breaking. Our choice of parameters is motivated by a proposed interpretation of anomalies in the extragalactic gamma-ray spectrum and the positron fraction in terms of gravitino dark matter decay. We find that the generated neutrino flux is compatible with present measurements. We also discuss the possibility of detecting these neutrinos in present and future experiments and conclude that it is a challenging task. However, if detected, this distinctive signal might bring significant support to the scenario of gravitinos as decaying dark matter.
description: 24 pages, 8 figures; references added and typos corrected, agrees with published version
Rezension: Ada Lovelace. Die Pionierin der Computertechnik und ihre Nachfolgerinnen
Creators: name: Schabschneider, Bettina
Publisher: name: Medienimpulse
Year: 2015

description: Medienimpulse, Bd. 53 Nr. 4 (2015): 4/2015 - Medienbildung im Kontext der "PädagogInnenbildung NEU"/Teil 2
Fokker-Planck Kinetic description of small-scale fluid turbulence for classical incompressible fluids
Creators: name: Tessarotto, M.
name: Ellero, M.
name: Sarmah, D.
name: Nicolini, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Extending the statistical approach proposed in a parallel paper \cite% {Tessarotto2008-aa}, purpose of this work is to propose a stochastic inverse kinetic theory for small-scale hydrodynamic turbulence based on the introduction of a suitable \textit{local phase-space probability density function} (pdf). In particular, we pose the problem of the construction of Fokker-Planck kinetic models of hydrodynamic turbulence. The approach here adopted is based on the so-called IKT approach (inverse kinetic theory), developed by Ellero et al. (2004-2008) which permits an exact phase-space description of incompressible fluids based on the adoption of a local pdf. We intend to show that for prescribed models of stochasticity the present approach permits to determine uniquely the time evolution of the stochastic fluid fields. The stochastic-averaged local pdf is shown to obey a kinetic equation which, although generally non-Markovian, locally in velocity-space can be approximated by means of a suitable Fokker-planck kinetic equation. As a side result, the same pdf is proven to have generally a non-Gaussian behavior.
description: Contributed paper at RGD26 (Kyoto, Japan, July 2008)
Der Moment an der Schwelle
Creators: name: Rogy, Raffaela
Publisher: name: Medienimpulse
Year: 2015

description: Untersucht werden in diesem Beitrag Momente an Zwischenorten, an Schwellen. Diese Grenzzonen werden mit Passivitätsmodellen wie dem Zögern und in Verbindung mit Bildtheorien anhand ausgewählter Filmbeispiele und Gemälde ausgelotet. Entscheidend dabei ist das Momentum sowie die Auswirkung auf die Figuren, wenn diese den Platz vor einem Bild einnehmen.
description: Medienimpulse, Bd. 53 Nr. 4 (2015): 4/2015 - Medienbildung im Kontext der "PädagogInnenbildung NEU"/Teil 2
Diffusional Nucleation of Nanocrystals and Their Self-Assembly into Uniform Colloids
Creators: name: Privman, Vladimir
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We review theoretical explanation of mechanisms of control of uniformity in growth of nanosize particles and colloids. The nanoparticles are synthesized as nanocrystals, by burst nucleation from solution. The colloids are self-assembled by aggregation of these nanocrystals. The two kinetic processes are coupled, and both are driven by diffusional transport. The interrelation of the two processes allows for formation of narrow-size-distribution colloid dispersions which are of importance in many applications. We review a mathematical model of cluster growth by capture of diffusing "singlets." Burst nucleation of nanoparticles in solution is then analyzed. Finally, we couple it to the secondary process of aggregation of nanoparticles to form colloids. We address aspects of modeling of particle size distribution, as well as other properties.
description: 15 pages in PDF
Isotropic AdS/CFT fireball
Creators: name: Kajantie, K.
name: Louko, Jorma
name: Tahkokallio, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the AdS/CFT thermodynamics of the spatially isotropic counterpart of the Bjorken similarity flow in d-dimensional Minkowski space with d>=3, and of its generalisation to linearly expanding d-dimensional Friedmann-Robertson-Walker cosmologies with arbitrary values of the spatial curvature parameter k. The bulk solution is a nonstatic foliation of the generalised Schwarzschild-AdS black hole with a horizon of constant curvature k. The boundary matter is an expanding perfect fluid that satisfies the first law of thermodynamics for all values of the temperature and the spatial curvature, but it admits a description as a scale-invariant fluid in local thermal equilibrium only when the inverse Hawking temperature is negligible compared with the spatial curvature length scale. A Casimir-type term in the holographic energy-momentum tensor is identified from the threshold of black hole formation and is shown to take different forms for k>=0 and k<0.
description: 20 pages. v3: typos corrected. Published version
Prediction of acute care bed requirements for scattered area populations
Creators: name: O’Brien, Eoin
Publisher: name: University of British Columbia
Year: 2010

description: In supporting the projection of bed requirements for Newfoundland to 1986, an extensive literature review was conducted to identify small area population projection methods and bed prediction models. A bed prediction model was developed for this study. For each health region, projected morbidity for diagnostic (bed) clusters was calculated by: projecting the age-sex population; holding 1976 age-sex cluster morbidity patterns and length of stay constant; projecting the base and flow referral morbidity patterns of four health regions and finally the projected morbidity patterns were combined and translated into beds and adjusted for occupancy. The population projection method was the Short Ratio. The diagnostic clusters were medical-surgical, obstetrical, pediatrics and psychiatry. The prediction of beds utilizing this model was compared with a bed to population rate method. It was demonstrated that bed requirements do change in respect of age-sex population changes. The requirements are stated for each region. This study suggests that the model used for bed and population projections are useful planning tools in Newfoundland because of ease in use. The elemental problem of supplying a population data base for each hospital district by age and sex was solved and is expected to be extremely useful in years to come. The usefulness will come from an evaluation of these methods and their acceptance as first steps in the planning process.
Dynamics of Social Balance on Networks: The Emergence of Multipolar Societies
Creators: name: Manshour, Pouya
name: Montakhab, Afshin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Within the context of social balance theory, much attention has been paid to the attainment and stability of unipolar or bipolar societies. However, multipolar societies are commonplace in the real world, despite the fact that the mechanism of their emergence is much less explored. Here, we investigate the evolution of a society of interacting agents with friendly (positive) and enmity (negative) relations into a final stable multipolar state. Triads are assigned energy according to the degree of tension they impose on the network. Agents update their connections in order to decrease the total energy (tension) of the system, on average. Our approach is to consider a variable energy $ε\in[0,1]$ for triads which are entirely made of negative relations. We show that the final state of the system depends on the initial density of the friendly links $ρ_0$. For initial densities greater than an $ε$ dependent threshold $ρ^c_0(ε)$ unipolar (paradise) state is reached. However, for $ρ_0 \leq ρ^c_0(ε)$ multi-polar and bipolar states can emerge. We observe that the number of stable final poles increases with decreasing $ε$ where the first transition from bipolar to multipolar society occurs at $ε^*\approx 0.67$. We end the paper by providing a mean-field calculation that provides an estimate for the critical ($ε$ dependent) initial positive link density, which is consistent with our simulations.
title: La quadratura del cerchio cesariano. Al mio benevolissimo sovrano Federico, Cesare Imperatore, Niccolò, cardinale di San Pietro, vescovo di Bressanone
Creators: name: De Felice, Federica
Publisher: name: Max-Planck-Gesellschaft zur Förderung der Wissenschaften
Year: 2020

description: Proposizione
Dimostrazione
Note a piè pagina
The deformation quantizations of the hyperbolic plane
Creators: name: Bieliavsky, Pierre
name: Detournay, Stéphane
name: Spindel, Philippe
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe the space of (all) invariant deformation quantizations on the hyperbolic plane as solutions of the evolution of a second order hyperbolic differential operator. The construction is entirely explicit and relies on non-commutative harmonic analytical techniques on symplectic symmetric spaces. The present work presents a unified method producing every quantization of the hyperbolic plane, and provides, in the 2-dimensional context, an exact solution to Weinstein's WKB quantization program within geometric terms. The construction reveals the existence of a metric of Lorentz signature canonically attached (or `dual') to the geometry of the hyperbolic plane through the quantization process.
description: 26 pages, 5 figures
Identifiability of parameters in latent structure models with many observed variables
Creators: name: Allman, Elizabeth S.
name: Matias, Catherine
name: Rhodes, John A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62E10 (Primary), 62F99, 62G99 (Secondary)

description: While hidden class models of various types arise in many statistical applications, it is often difficult to establish the identifiability of their parameters. Focusing on models in which there is some structure of independence of some of the observed variables conditioned on hidden ones, we demonstrate a general approach for establishing identifiability utilizing algebraic arguments. A theorem of J. Kruskal for a simple latent-class model with finite state space lies at the core of our results, though we apply it to a diverse set of models. These include mixtures of both finite and nonparametric product distributions, hidden Markov models and random graph mixture models, and lead to a number of new results and improvements to old ones. In the parametric setting, this approach indicates that for such models, the classical definition of identifiability is typically too strong. Instead generic identifiability holds, which implies that the set of nonidentifiable parameters has measure zero, so that parameter inference is still meaningful. In particular, this sheds light on the properties of finite mixtures of Bernoulli products, which have been used for decades despite being known to have nonidentifiable parameters. In the nonparametric setting, we again obtain identifiability only when certain restrictions are placed on the distributions that are mixed, but we explicitly describe the conditions.
description: Published in at http://dx.doi.org/10.1214/09-AOS689 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Splitting the wavefunctions of two particles in two boxes
Creators: name: van Enk, S. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Physics Education (physics.ed-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: I consider two identical quantum particles in two boxes. We can split each box, and thereby the wavefunction of each particle, into two parts. When two half boxes are interchanged and combined with the other halves, where do the two particles end up? I solve this problem for two identical bosons and for two identical fermions. The solution can be used to define a measurement that yields some information about the relative phase between the two parts of a split wavefunction.
description: The following article has been submitted to the American Journal of Physics. After it is published, it will be found at http://scitation.aip.org/ajp
Manifestations of metastable criticality in the long-range structure of model water glasses
Creators: name: Gartner, Thomas E.
name: Torquato, Salvatore
name: Car, Roberto
name: Debenedetti, Pablo G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Much attention has been devoted to water's metastable phase behavior, including polyamorphism (multiple amorphous solid phases), and the hypothesized liquid-liquid transition and associated critical point. However, the possible relationship between these phenomena remains incompletely understood. Using molecular dynamics simulations of the realistic TIP4P/2005 model, we found a striking signature of the liquid-liquid critical point in the structure of water glasses, manifested as a pronounced increase in long-range density fluctuations at pressures proximate to the critical pressure. By contrast, these signatures were absent in glasses of two model systems that lack a critical point. We also characterized the departure from equilibrium upon vitrification via the non-equilibrium index; water-like systems exhibited a strong pressure dependence in this metric, whereas simple liquids did not. These results reflect a surprising relationship between the metastable equilibrium phenomenon of liquid-liquid criticality and the non-equilibrium structure of glassy water, with implications for our understanding of water phase behavior and glass physics. Our calculations suggest a possible experimental route to probing the existence of the liquid-liquid transition in water and other fluids.
description: 9 pages, 5 figures. Published in Nature Communications (2021)
title: Dialogo sulla quadratura del cerchio. Dialogo tra il cardinale di San Pietro, vescovo di Bressanone, e Paolo, fisico fiorentino, sulla quadratura del cerchio
Creators: name: De Felice, Federica
Publisher: name: Max-Planck-Gesellschaft zur Förderung der Wissenschaften
Year: 2020

description: ‹Appendice›
Note a piè pagina
Casimir energy in the gauge/gravity description of Bjorken flow?
Creators: name: Kajantie, K.
name: Louko, Jorma
name: Tahkokallio, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the AdS/CFT description of four-dimensional QCD matter undergoing Bjorken expansion, does the holographic energy-momentum tensor contain a Casimir-type contribution that should not be attributed to thermal matter? When the bulk isometry ansatz that yielded such a Casimir term for (1+1)-dimensional boundary matter is generalised to a four-dimensional boundary, we show that a Casimir term does not arise, owing to singularities in the five-dimensional bulk solution. The geometric reasons are traced to a difference between the isometries of AdS_3 and AdS_{d+1} for d>=3.
description: 14 pages. v3: Relationship to the work in [3] clarified. Typos corrected. Published version
Machtverhältnisse in den Darstellungen der Religionen im Orbis sensualium pictus des Comenius
Creators: name: Lasser, Bernhard
name: Treinen, Christian
Publisher: name: Medienimpulse
Year: 2017

description: Medienimpulse, Bd. 54 Nr. 4 (2016): 4/2016 - Macht, Souveränität, Herrschaft
Efficient Fine-Tuning of Large Language Models for Automated Medical Documentation
Creators: name: Leong, Hui Yi
name: Gao, Yi Fan
name: Shuai, Ji
name: Zhang, Yang
name: Pamuksuz, Uktu
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Scientific research indicates that for every hour spent in direct patient care, physicians spend nearly two additional hours on administrative tasks, particularly on electronic health records (EHRs) and desk work. This excessive administrative burden not only reduces the time available for patient care but also contributes to physician burnout and inefficiencies in healthcare delivery. To address these challenges, this study introduces MediGen, a fine-tuned large language model (LLM) designed to automate the generation of medical reports from medical dialogues. By leveraging state-of-the-art methodologies for fine-tuning open-source pretrained models, including LLaMA3-8B, MediGen achieves high accuracy in transcribing and summarizing clinical interactions. The fine-tuned LLaMA3-8B model demonstrated promising results, achieving a ROUGE score of 58% and a BERTScore-F1 of 72%, indicating its effectiveness in generating accurate and clinically relevant medical reports. These findings suggest that MediGen has the potential to significantly reduce the administrative workload on physicians, improving both healthcare efficiency and physician well-being.
description: 4 pages, 3 Figures, 3 Tables. The final version will be published in the proceedings of the IEEE conference
Normalisation and subformula property for a system of intuitionistic logic with general introduction and elimination rules
Creators: name: Kürbis, Nils
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic (math.LO)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: This paper studies a formalisation of intuitionistic logic by Negri and von Plato which has general introduction and elimination rules. The philosophical importance of the system is expounded. Definitions of `maximal formula', `segment' and `maximal segment' suitable to the system are formulated and corresponding reduction procedures for maximal formulas and permutative reduction procedures for maximal segments given. Alternatives to the main method used are also considered. It is shown that deductions in the system convert into normal form and that deductions in normal form have the subformula property.
description: arXiv admin note: substantial text overlap with arXiv:2108.03939
Opcion National Survey: Uruguay June 2018
Creators: name: Opción Consultores, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Interest in politics; political news frequency; 2019 general election; vote for or against parties; winning party prediction; National Party; Frente Amplio (a leftist political coalition); Colorado Party; Independent Party; People's Party; Unidad Popular (a left-wing political coalition); President Tabaré Vázquez job approval; confidence in the opposition's party ability to govern; likeability of candidates and political leaders; Luis Lacalle Pou (National Party); Daniel Martínez (Frente Amplio); Jorge Larrañaga (National Party); Pablo Mieres (Independent Party); Edgardo Novick (People's Party); José Amorín Batlle (Colorado Party); Verónica Alonso (Frente Amplio); Fernando Amado (National Party); former President José Mujica; Venezuela/Nicolás Maduro democracy or dictatorship; military policing; crime; 2014 general election. National Agency for Research and Innovation (ANII) Collection.
On the maximal superalgebras of supersymmetric backgrounds
Creators: name: Figueroa-O'Farrill, José
name: Hackett-Jones, Emily
name: Moutsopoulos, George
name: Simón, Joan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this note we give a precise definition of the notion of a maximal superalgebra of certain types of supersymmetric supergravity backgrounds, including the Freund-Rubin backgrounds, and propose a geometric construction extending the well-known construction of its Killing superalgebra. We determine the structure of maximal Lie superalgebras and show that there is a finite number of isomorphism classes, all related via contractions from an orthosymplectic Lie superalgebra. We use the structure theory to show that maximally supersymmetric waves do not possess such a maximal superalgebra, but that the maximally supersymmetric Freund-Rubin backgrounds do. We perform the explicit geometric construction of the maximal superalgebra of AdS_4 x S^7 and find that is isomorphic to osp(1|32). We propose an algebraic construction of the maximal superalgebra of any background asymptotic to AdS_4 x S^7 and we test this proposal by computing the maximal superalgebra of the M2-brane in its two maximally supersymmetric limits, finding agreement.
description: 17 pages
Functional bodies
Creators: name: Klinger, Kerrin
Publisher: name: Medienimpulse
Year: 2017

description: Der materiale Ausgangspunkt dieses Beitrags ist eine Sammlung von 16mm-Lehrfilmen aus dem Bestand der ehemaligen Schulbildstelle Weimar, die im Zeitraum zwischen 1950 und 1990 produziert und in den Schulen der DDR genutzt wurden. Der Bestand umfasst insgesamt 258 verschiedene Filmtitel, vor allem aus dem Bereich der Naturwissenschaften, aber auch Filme zu geographischen, historischen, literarischen Themen oder zum Arbeitsschutz; sowie einige Unterhaltungsfilme für Kinder sind darunter. Mit den meisten Kopien ist der Lehrfilm zum Geiger-Müller-Zählrohr (Teil I und II, DDR 1963) in der Sammlung vorhanden. Es ist davon auszugehen, dass diese Filmbilder noch immer Teil des sozialen Gedächtnisses und der kollektiven Identität des östlichen Teils Deutschlands sind. Dieser Beitrag fragt: Inwiefern repräsentieren die Filmcharaktere und -körper politische Modelle?
description: Medienimpulse, Bd. 54 Nr. 4 (2016): 4/2016 - Macht, Souveränität, Herrschaft
Antipathie für den Teufel
Creators: name: Steiner, Manon
Publisher: name: Medienimpulse
Year: 2017

description: In den Sechzigerjahren wurde Rock 'n' Roll zum Katalysator einer frustrierten Jugend, die mit alten Gesellschaftsmustern brach und Rockstars zu ihren neuen Göttern erklärte. Staatliche Autoritäten wie die Presse in den USA und Großbritannien verdammten das Aufbegehren der Jugend. Auf der einen Seite wurde sie mitsamt ihrer Musik verteufelt, auf der anderen Seite spielten Bands wie die Rolling Stones mit den Symboliken von Sünde und Satan. Dieses schizophrene Bild von Luzifer als Erlöser und Übeltäter zugleich soll hier thematisiert werden.
description: Medienimpulse, Bd. 54 Nr. 4 (2016): 4/2016 - Macht, Souveränität, Herrschaft
Uso de Redes Neurais Artificiais na Predição da Resistência à Compressão do Concreto
Creators: name: Tavares, Dennis
name: Yanagi Junior, Tadayuki
name: Lacerda, Wilian
name: Ribeiro, David
Publisher: name: figshare
Year: 2021
Subjects: subject: 90603 Industrial Electronics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: O concreto é um dos materiais de construção civil mais utilizados, sendo composto de diferentes componentes com diversas propriedades, o que torna a tarefa de dosagem e determinação da resistência complexas. As Redes Neurais Artificiais (RNA) são ferramentas que possuem a capacidade de generalização e aprendizado a partir de experiências anteriores que são fornecidas por um banco de dados previamente construído. Este trabalho tem como objetivo a implementação de RNA na determinação da resistência a compressão do concreto de várias idades. Os dados de entrada são as quantidades dos materiais e a saída é a resistência à compressão. Os resultados obtidos se mostraram satisfatórios e promissores do ponto de vista da engenharia civil.