cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
N=4 multi-particle mechanics, WDVV equation and roots
Creators: name: Lechtenfeld, Olaf
name: Schwerdtfeger, Konrad
name: Thürigen, Johannes
Publisher: name: Kiew : National Academy of Science of Ukraine
Year: 2011
Subjects: subject: Calogero models
subject: Deformed root systems
subject: Superconformal mechanics
subject: WDVV equation
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: We review the relation of N=4 superconformal multi-particle models on the real line to the WDVV equation and an associated linear equation for two prepotentials, F and U. The superspace treatment gives another variant of the integrability problem, which we also reformulate as a search for closed flat Yang-Mills connections. Three- and four-particle solutions are presented. The covector ansatz turns the WDVV equation into an algebraic condition, for which we give a formulation in terms of partial isometries. Three ideas for classifying WDVV solutions are developed: ortho-polytopes, hypergraphs, and matroids. Various examples and counterexamples are displayed.
Intersecting quantum gravity with noncommutative geometry - A review?
Creators: name: Aastrup, Johannes
name: Grimstrup, Jesper Moller
Publisher: name: Kyiv : Institute of Mathematics of National Academy of Sciences of Ukraine, Department of Applied Research
Year: 2012
Subjects: subject: Noncommutative geometry
subject: Quantum gravity
subject: Semiclassical analysis
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: We review applications of noncommutative geometry in canonical quantum gravity. First, we show that the framework of loop quantum gravity includes natural noncommutative structures which have, hitherto, not been explored. Next, we present the construction of a spectral triple over an algebra of holonomy loops. The spectral triple, which encodes the kinematics of quantum gravity, gives rise to a natural class of semiclassical states which entail emerging fermionic degrees of freedom. In the particular semiclassical approximation where all gravitational degrees of freedom are turned off, a free fermionic quantum field theory emerges. We end the paper with an extended outlook section.
title: AID Project Summary Report for Intelligent Compaction
Creators: name: Hunsucker, David Q.
name: Ashurst, Kean H., Jr.
name: Rister, Brad W.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2019

description: This study reviews data from five roadway construction projects on which intelligent compaction (IC) techniques were used to achieve the more uniform compaction of road-building materials. Kentucky Transportation Center (KTC) researchers looked at IC data collected from these projects — resulting in the production of eight analyzable data sets — to determine whether they complied with the special construction note included in contract documents. The report also compares the intelligent compaction measurement value (ICMV) collected on each project to traditional laboratory results. Researchers used Veta software to analyze geospatial data collected from IC machines during construction work. Of the data sets, three indicated the required minimum coverage pass count had been achieved, although these did not attain the required minimum coverage for ICMV. Three other data sets achieved minimum ICMV coverage, while the final two data sets did not reach minimum coverage for either metric. Regression analysis found no meaningful relationship between density and ICMV. Attention is also paid to challenges which arose during the review of IC data and feedback received from contractors about the use of IC. Contractors appreciate that IC is able to transmit real-time data to operators and provides access to the mat temperature, however they observed inconsistencies with the ICMV for mill/fill projects and on new construction. These inconsistencies are the product of several factors, including cuts, fills, soil types, and the amount of water in the roller. A special construction note with instructions for using IC on Federal-aid projects is included as well. It specifies materials and equipment requirements, contractor responsibilities, construction methods, payment, and performance measures.
description: Copyright:
© 2018 University of Kentucky, Kentucky Transportation Center
Indirect comparison of Debrecen and Greenwich daily sums of sunspot areas
Creators: name: Baranyi, T.
name: Király, S.
name: Coffey, H. E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Sunspot area data play an important role in the studies of solar activity and its long-term variations. In order to reveal real long-term solar variations precise homogeneous sunspot area databases should be used. However, the measured areas may be burdened with systematic deviations, which may vary in time. Thus, there is a need to investigate the long-term variation of sunspot area datasets and to determine the time-dependent cross-calibration factors. In this study, we investigate the time-dependent differences between the available long-term sunspot databases. Using the results, we estimate the correction factor to calibrate the corrected daily sunspot areas of Debrecen Photoheliographic Data (DPD) to the same data of Greenwich Photoheliographic Results (GPR) by using the overlapping Kislovodsk and Pulkovo data. We give the correction factor as GPR=1.08(\pm 0.11)*DPD
description: 9 pages, 7 figures, Accepted for publication in MNRAS
title: Architektura mieszkaniowa międzywojennego Kowna na przykładzie zabudowy ulicy V. Putvinskio. Residential architecture of interwar Kaunas on the example of buildings at V. Putvinskio street
Creators: name: Niebrzydowski, Wojciech
Publisher: name: Politechnika Białostocka
Year: 2019

description: Streszczenie: Celem  artykułu  była  ogólna  charakterystyka  architektury  mieszkaniowej  zrealizowanej  w latach  dwudziestych  i trzydziestych  XX  wieku  w centrum  Kowna.  Był  to  okres  intensywnych  przemian  i rozwoju  związanego  z uzyskaniem  przez  to miasto statusu „przejściowej stolicy” Litwy. W pierwszych rozdziałach przedstawiono uwarunkowania, jakie towarzyszyły tym procesom, oraz ich główne kierunki i skalę. W ogólny sposób omówiono najważniejsze aspekty przekształceń struktury urbanistycznej Kowna, wskazano najbardziej prestiżowe realizacje i czołowych architektów. Następnie skupiono się na  budynkach  mieszkalnych,  które  w okresie  międzywojennym  stanowiły  największą  grupę  nowych  obiektów.  Zakres szczegółowych  badań  ograniczono  do  wielorodzinnych  budynków  mieszkalnych  wzniesionych  przy  ulicy  V.  Putvinskio, jako reprezentatywnego przykładu zabudowy w centrum miasta. Metoda badawcza obejmowała studia literatury, wywiady z   miejscowymi architektami i badaczami architektury, ogląd obiektów, wykonanie dokumentacji fotograficznej. W trakcie badań wstępnych wyłoniono pięć budynków, które poddano analizom porównawczym, m.in. w zakresie stylistyki architektonicznej oraz kształtowania form i rozwiązań funkcjonalno-przestrzennych. Wyniki badań przedstawiono w podsumowaniu, w postaci wniosków. Najważniejsze z nich wskazują na: odniesienia historyczne widoczne w budynkach wznoszonych w latach  dwudziestych,  dominację  stylu  modernistycznego  w latach  trzydziestych,  regionalny  charakter  kowieńskiego modernizmu, specyficzne elementy i detale architektoniczne, jednoklatkowe układy budynków, swobodny sposób kształtowania pierzei.
Słowa kluczowe: architektura mieszkaniowa; historia i teoria architektury XX wieku; Kowno
Der gefallene Mensch? : Alkohol und Drogen im Spiegel von Strafrecht und Kriminologie
Creators: name: Kinzig, Jörg
Publisher: name: Universität Tübingen
Year: 2020
Subjects: subject: Rausch
subject: Deutschland / Strafgesetzbuch
subject: Deutschland / Betäubungsmittelgesetz
subject: Strafbarkeit
subject: Drogenkonsum
subject: Kriminologie
subject: Straftatbestand
subject: Empirische Befunde

description: akzeptierte Manuskriptversion
Structure of CB 26 Protoplanetary Disk Derived from Millimeter Dust Continuum Maps
Creators: name: Akimkin, V.
name: Pavlyuchenkov, Ya.
name: Launhardt, R.
name: Bourke, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Observations of the circumstellar disk in the Bok globule CB 26 at 110, 230, and 270 GHz are presented together with the results of the simulations and estimates of the disk parameters. These observations were obtained using the SMA, IRAM Plateau de Bure, and OVRO interferometers. The maps have relatively high angular resolutions (0.4-1"), making it possible to study the spatial structure of the gas-dust disk. The disk parameters are reconstructed via a quantitative comparison of observational and theoretical intensity maps. The disk model used to construct the theoretical maps is based on the assumption of hydrostatic and radiative equilibrium in the vertical direction, while the radial surface density profile is described phenomenologically. The system of equations for the transfer of the infrared and ultraviolet radiation is solved in the vertical direction, in order to compute the thermal structure of the disk. The disk best-fit parameters are derived for each map and all the maps simultaneously, using a conjugate gradient method. The degrees of degeneracy of the parameters describing the thermal structure and density distribution of the disk are analyzed in detail. All three maps indicate the presence of an inner dust-free region with a radius of approximately 35 AU, in agreement with the conclusions of other studies. The inclination of the disk is 78 deg, which is smaller than the value adopted in our earlier study of rotating molecular outflows from CB 26. The model does not provide any evidence for the growth of dust particles above a_max=0.02 cm.
description: 15 pages, 9 figures, 2 tables
title: Budownictwo z surowej ziemi na Sejneńszczyźnie. Earthen vernacular architecture in the region of Sejny, N-E Poland
Creators: name: Boguska, Karolina
name: Budowicz, Ewelina
name: Szewczyk, Jarosław
Publisher: name: Politechnika Białostocka
Year: 2019

description: Streszczenie: Jesienią  2016  roku  podjęto  serię  terenowych  wyjazdów  badawczych  na  Sejneńszczyźnie,  na  północy  województwa podlaskie go. Zamierzonym celem badań miało być rozpoznanie występowania i ocena stanu budownictwa z surowej ziemi w   tamtym rejonie. Zarejestrowano serię wywiadów z autochtonami i zgromadzono zasób dokumentacji fotograficznej kilku-dziesięciu budynków gospodarczych z surowej ziemi (nie natrafiono na budynki mieszkalne o tej konstrukcji), wzniesionych około po łowy XX wieku. W artykule zaprezentowano część zgromadzonego materiału z wnioskami odnoszącymi się do niuansów konstrukcyjnych, materiałowych, estetyki i występowania budynków z surowej ziemi na Sejneńszczyźnie.
Słowa  kluczowe:  architektura  wernakularna;  architektura  rodzima;  budownictwo  ludowe;  lokalne  materiały  budowlane; glinobitka; Sejneńszczyzna
Weak solution method of the non-perturbative renormalization group equation to describe dynamical chiral symmetry breaking and its application to beyond the ladder analysis in QCD
Creators: name: Aoki, Ken-Ichi
name: Sato, Daisuke
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The method of non-perturbative renormalization group (NPRG) is applied to the analysis of dynamical chiral symmetry breaking (DCSB) in QCD. We show that the DCSB solution of the NPRG flow equation can be obtained without the bosonization. The solution, having the singular point, can be authorized as the weak solution of partial differential equation, and can be easily evaluated using the method of the characteristic curve. Also we show that our non-ladder extended approximation improves almost perfectly the gauge dependence of the chiral condensates.
description: 6 pages, 3 figures, contribution to SCGT12 "KMI-GCOE Workshop on Strong Coupling Gauge Theories in the LHC Perspective", 4-7 Dec. 2012, Nagoya University
Lycium halimifolium
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: L. halimifolium Miller (L. barbarum auct.) Cat. 266. Kultiviert und verwildert. Verwildert in neuerer Zeit beobachtet: 3: Charrat (Gams, Closuit); zwischen Unterems und Mittelems (Maillefer 1949); Bahnhof Visp (Koch 1945, Becherer 1950); Zermatt (Becherer1950).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
The Model Magnetic Configuration of the Extended Corona in the Solar Wind Formation Region
Creators: name: Veselovsky, Igor
name: Panasenco, Olga
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The coupling between small and large scale structures and processes on the Sun and in the heliosphere is important in the relation to the global magnetic configuration. Thin heliospheric current sheets play the leading role in this respect. The simple analytical model of the magnetic field configuration is constructed as a superposition of the three sources: 1) a point magnetic dipole in the center of the Sun, 2) a thin ring current sheet with the azimuthal current density j_φ ~ r^{-3} near the equatorial plane and 3) a magnetic quadrupole in the center of the Sun. The model reproduces, in an asymptotically correct manner, the known geometry of the field lines during the declining phase and solar minimum years near the Sun (the dipole term) as well as at large distances in the domain of the superalfvenic solar wind in the heliosphere, where the thin current sheet dominates and |B_{r}(θ)|=const according to Ulysses observations (Balogh et al., 1995; Smith et al., 1995). The model with the axial quadrupole term is appropriate to describe the North-South asymmetry of the field lines. The model may be used as a reasonable analytical interpolation between the both extreme asymptotic domains (inside the region of the intermediate distances ~ (1-10)R_sun) when considering the problems of the solar wind dynamics and cosmic ray propagation theories.
Hubble Space Telescope detection of oxygen in the atmosphere of exoplanet HD189733b
Creators: name: Ben-Jaffel, Lotfi
name: Ballester, Gilda
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Detecting heavy atoms in the inflated atmospheres of giant exoplanets that orbit close to their parent stars is a key factor for understanding their bulk composition, and the processes that drive their expansion and interaction with the impinging stellar wind. Here, we use archive data obtained with the Cosmic Origins Spectrograph onboard the Hubble Space Telescope to report an absorption of ~6.4+/-1.8% by neutral oxygen during the HD 189733b transit. Scaling published HI results from a simple hydrodynamic model of HD 189733b, a vertical OI column density of ~8x10^15/cm2 produces only a 3.5% attenuation, implying that non-thermal line broadening or super-solar abundances are required. We also report evidence of short-time variability in the measured stellar flux, a variability that we analyze and compare to solar flaring activity. In that frame, we find that non-statistical uncertainties in the measured fluxes are not negligible, which calls for caution when reporting transit absorptions. Despite these uncertainties, we also show a possible detection for both a transit and early-ingress absorption in the ion CII 133.5nm lines. If confirmed, this would be the second exoplanet for which an early-ingress absorption is reported. Assuming the HD 189733b magnetosphere to be at the origin of the early absorption, we use the Parker model for the stellar wind and a particle-in-cell code for the magnetosphere to show that its orientation should be deflected ~10-30° from the planet-star line, while its nose's position should be at least ~16.7 Rp upstream of the exoplanet in order to fit the CII transit light curve. The derived stand-off distance is consistent with a surface magnetic field strength of ~5.3 Gauss for the exoplanet, and a supersonic stellar wind impinging at ~250 km/s, with a temperature of 1.2x10^5K and a density ~6.3x10^6/cm^3 at the planetary orbit, yet the fit is not unique.
description: Astronomy & Astrophysics, in press. Abstract shown is shorter
Turbulent transport in radiative zones of stars
Creators: name: Prat, Vincent
name: Lignières, François
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. In stellar interiors, rotation is able to drive turbulent motions, and the related transport processes have a significant influence on the evolution of stars. Turbulent mixing in the radiative zones is currently taken into account in stellar evolution models through a set of diffusion coefficients that are generally poorly constrained. Aims. We want to constrain the form of one of them, the radial diffusion coefficient of chemical elements due to the turbulence driven by radial differential rotation, derived by Zahn (1974, 1992) on phenomenological grounds and largely used since. Methods. We performed local, direct numerical simulations of stably stratified homogeneous sheared turbulence using the Boussinesq approximation. The domain of low Péclet numbers found in stellar interiors is currently inaccessible to numerical simulations without approximation. It is explored here thanks to a suitable asymptotic form of the Boussinesq equations. The turbulent transport of a passive scalar is determined in statistical steady states. Results. We provide a first quantitative determination of the turbulent diffusion coefficient and find that the form proposed by Zahn is in good agreement with the results of the numerical simulations.
description: 4 pages, 3 figures, 1 table (A&A Letters, accepted)
title: „Księstwo sławieńskie lub sławieńsko-słupskie” – mi(s)tyczny twór na Pomorzu
Creators: name: Kruszewski, Tomasz
Publisher: name: E-Wydawnictwo. Prawnicza i Ekonomiczna Biblioteka Cyfrowa. Wydział Prawa, Administracji i Ekonomii Uniwersytetu Wrocławskiego
Year: 2019

description: Autor przedstawia problem, jak jedna nietrafna koncepcja w nauce żyje w niej po dzień obecny. Historyk-amator Ludwig Quandt, z zawodu duchowny w połowie XIX stulecia sam stworzył księstwo sławieńsko-słupskie, rzekomo istniejące w XII-XIII w., gdy tymczasem zaistniało w późniejszym czasie. Cała plejada słynnych historyków rozwijała ten nonsens aż po wiek obecny. Księstwo to w istotny sposób podważył już Edward Rymar, ale ostateczne usunięcie tego zmyślonego tworu z „historii” to zadanie dla historyka ustroju i prawa
Superconductivity From Repulsive Electronic Correlations on Alternant Cuprate and Iron-based Lattices
Creators: name: Dunne, Lawrence J.
name: Brändas, Erkki J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A key question in the theory of high-temperature superconductivity is whether Off-diagonal Long-Range Order (ODLRO) can be induced wholly or in large part by repulsive electronic correlations. Electron pairs on Cuprate and the iron-based pnictide and chalcogenide alternant lattices may interact with a strong short-range Coulomb repulsion and much weaker longer range attractive tail. Here we show that such interacting electrons can cooperate to produce a superconducting state in which time-reversed electron pairs effectively avoid the repulsive part but reside predominantly in the attractive region of the potential. The alternant lattice structure is a key feature of such a stabilization mechanism leading to the occurrence of high temperature superconductivity with dx2 -y2 or sign alternating s-wave or s plus/minus condensate symmetries.
On the extension of the Laplace-Lagrange secular theory to order two in the masses for extrasolar systems
Creators: name: Libert, Anne-Sophie
name: Sansottera, Marco
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the secular evolution of several exoplanetary systems by extending the Laplace-Lagrange theory to order two in the masses. Using an expansion of the Hamiltonian in the Poincaré canonical variables, we determine the fundamental frequencies of the motion and compute analytically the long-term evolution of the keplerian elements. Our study clearly shows that, for systems close to a mean-motion resonance, the second order approximation describes their secular evolution more accurately than the usually adopted first order one. Moreover, this approach takes into account the influence of the mean anomalies on the secular dynamics. Finally, we set up a simple criterion that is useful to discriminate between three different categories of planetary systems: (i) {\it secular} systems (HD 11964, HD 74156, HD 134987, HD 163607, HD 12661 and HD 147018); (ii) systems {\it near a mean-motion resonance} (HD 11506, HD 177830, HD 9446, HD 169830 and $\upsilon$ Andromedae); (iii) systems {\it really close to} or {\it in a mean-motion resonance} (HD 108874, HD 128311 and HD 183263).
description: 22 pages, 4 figures
Meson Decays in an Extended Nambu--Jona-Lasinio model with Heavy Quark Flavors
Creators: name: Deng, Hong-Bo
name: Chen, Xiao-Lin
name: Deng, Wei-Zhen
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In a previous work, we proposed an extended Nambu--Jona-Lasinio (NJL) model including heavy quark flavors. In this work, we will calculate strong and radiative decays of vector mesons in this extended NJL model, including light $ρ$, $ω$, $K^*$, $ϕ$ and heavy $D^*$, $D^*_s$, $B^*$, $B^*_s$.
Opting for Exit: Informalization, Social Policy Discontent, and Lack of Good Governance
Creators: name: Berens, Sarah
Publisher: name: Cambridge University Press (CUP)
Year: 2020
Subjects: subject: Informal sector
subject: Institutions
subject: Latin America
subject: The Caribbean
subject: Preferences
subject: Welfare State
subject: 300

description: The informal sector challenges economic growth and hinders the abatement of income disparities in developing countries. This study argues that a weak and poorly governed welfare state can cause the informal sector to increase when individuals use it as an exit option from an unsatisfying welfare system. The article explores how the welfare state’s benefit structure and citizens’ trust in institutions to deliver public goods affect the likelihood of informality. A logistic hierarchical model, based on cross-sectional survey data from Latin America and the Caribbean and descriptive panel data from Brazil, is used to test the hypothesis. Findings reveal that social policy discontent, low trust, an elitist distribution of welfare benefits, and dysfunctional institutions increase the likelihood of being informally employed. However, workers with greater agency—the better-educated—seem notably less likely to informalize when social policy benefits are targeted toward their own socioeconomic group.
Five New Outbursting AM CVn Systems Discovered by the Palomar Transient Factory
Creators: name: Levitan, David
name: Kupfer, Thomas
name: Groot, Paul J.
name: Kulkarni, Shrinivas R.
name: Prince, Thomas A.
name: Simonian, Gregory V.
name: Arcavi, Iair
name: Bloom, Joshua S.
name: Laher, Russ
name: Nugent, Peter E.
name: Ofek, Eran O.
name: Sesar, Branimir
name: Surace, Jason
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present five new outbursting AM CVn systems and one candidate discovered as part of an ongoing search for such systems using the Palomar Transient Factory (PTF). This is the first large-area, systematic search for AM CVn systems using only large-amplitude photometric variability to select candidates. Three of the confirmed systems and the candidate system were discovered as part of the PTF transient search. Two systems were found as part of a search for outbursts through the PTF photometric database. We discuss the observed characteristics of each of these systems, including the orbital periods of two systems. We also consider the position of these systems, selected in a colour-independent survey, in colour-colour space and compare to systems selected solely by their colours. We find that the colours of our newly discovered systems do not differ significantly from those of previously known systems, but significant errors preclude a definitive answer.
description: 13 pages, 11 figures, accepted to MNRAS
Alkekengi L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: Ph. Alkekengi L. Cat. 267 und 429. Bis 1300m. l: Collonges (Gams). - 2: Branson-Tassonnieres (F., Terretaz); Randonne ob Fully-Saillon, 1300 m (J.); beim Cipollinbruch ob Saillon, 900 m (Dübi); ob St-Leonard (Besse); Brigerbad (Hirschmann). - 3: Econe (Besse); Riddes (idem); Visp (Hirschmann); Visp-Stalden (Thommen, Hirschmann); Törbel (Stebler).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
On time-varying collaboration networks
Creators: name: Viana, Matheus P.
name: Amancio, Diego R.
name: Costa, Luciano da F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The patterns of scientific collaboration have been frequently investigated in terms of complex networks without reference to time evolution. In the present work, we derive collaborative networks (from the arXiv repository) parameterized along time. By defining the concept of affine group, we identify several interesting trends in scientific collaboration, including the fact that the average size of the affine groups grows exponentially, while the number of authors increases as a power law. We were therefore able to identify, through extrapolation, the possible date when a single affine group is expected to emerge. Characteristic collaboration patterns were identified for each researcher, and their analysis revealed that larger affine groups tend to be less stable.
Curvature-induced resolution of anti-brane singularities
Creators: name: Junghans, Daniel
name: Schmidt, Daniel
name: Zagermann, Marco
Publisher: name: New York : Springer
Year: 2014
Subjects: subject: Flux compactifications; D-branes; Superstring Vacua
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We study AdS(7) vacua of massive type IIA string theory compactified on a 3-sphere with H-3 flux and anti-D6-branes. In such backgrounds, the anti-brane backreaction is known to generate a singularity in the H-3 energy density, whose interpretation has not been understood so far. We first consider supersymmetric solutions of this setup and give an analytic proof that the flux singularity is resolved there by a polarization of the anti-D6-branes into a D8-brane, which wraps a finite 2-sphere inside of the compact space. To this end, we compute the potential for a spherical probe D8-brane on top of a background with backreacting anti-D6-branes and show that it has a local maximum at zero radius and a local minimum at a finite radius of the 2-sphere. The polarization is triggered by a term in the potential due to the AdS curvature and does therefore not occur in non-compact setups where the 7d external spacetime is Minkowski. We furthermore find numerical evidence for the existence of non-supersymmetric solutions in our setup. This is supported by the observation that the general solution to the equations of motion has a continuous parameter that is suggestive of a modulus and appears to control supersymmetry breaking. Analyzing the polarization potential for the non-supersymmetric solutions, we find that the flux singularities are resolved there by brane polarization as well.
Single particle energy diffusion from relativistic spontaneous localization
Creators: name: Bedingham, Daniel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Energy diffusion due to spontaneous localization (SL) for a relativistically-fast moving particle is examined. SL is an alternative to standard quantum theory in which quantum state reduction is treated as a random physical process which is incorporated into the Schrödinger equation in an observer-independent way. These models make predictions in conflict with standard quantum theory one of which is non conservation of energy. On the basis of proposed relativistic extensions of SL it is argued that for a single localized particle, non-relativistic SL should remain valid in the rest frame of the particle. The implication is that relativistic calculations can be performed by transforming non-relativistic results from the particle rest frame to the frame of an inertial observer. This is demonstrated by considering a relativistic stream of non-interacting particles of cosmological origin and showing how their energy distribution evolves as a result of SL as they traverse the Universe. A solution is presented and the potential for astrophysical observations is discussed.
description: 17 pages, 1 figure
Apathy or Anger? How Crime Experience Affects Individual Vote Intention in Latin America and the Caribbean
Creators: name: Berens, Sarah
name: Dallendörfer, Mirko
Publisher: name: Sage
Year: 2019
Subjects: subject: Crime victimization
subject: Vote intention
subject: Violence
subject: Voting behavior
subject: Latin America and the Caribbean
subject: 300

description: Does the experience of crime lead to individual disenchantment from politics or can it even stir political activism? We study how crime victimization affects the intention to vote with survey data from Latin America and the Caribbean. Research on non-electoral political behavior reveals that crime victims become politically more engaged. In contrast, findings from psychological research suggest that victimization increases apathy due to loss of self-esteem and social cohesion. Building a cognitive foundation of political activism, we propose that it is the level of distress which increases—in the case of non-violent crime—or decreases—in the case of violent crime experience—the likelihood of voting. The results support the hypothesis on victims of non-violent crime. The probability of turnout does, however, not change for victims of criminal violence. We subsequently test for a possible anti-right-wing incumbent effect, to explain the mobilization of victims of non-violent crime, but only find evidence for an anti-center incumbent tendency.
Generalised structures for N=1 AdS backgrounds
Creators: name: Coimbra, André
name: Strickland-Constable, Charles
Publisher: name: New York, NY : Springer International Publishing
Year: 2016
Subjects: subject: Differential and Algebraic Geometry
subject: Flux compactifications
subject: Superstring Vacua
subject: AdS-CFT Correspondence
subject: holonomy
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We expand upon a claim made in a recent paper [arXiv: 1411.5721] that generic minimally supersymmetric AdS backgrounds of warped flux compactifications of Type II and M theory can be understood as satisfying a straightforward weak integrability condition in the language of E-d(d) x R+ generalised geometry. Namely, they are spaces admitting a generalised G-structure set by the Killing spinor and with constant singlet generalised intrinsic torsion.
Systematische Zielgruppenbefragung - Methode und Ergebnisse von Fokusgruppen-Interviews durch ZB MED
Creators: name: Gail, Fabian
name: Vetter, Mark
Publisher: name: Verein Informationspraxis
Year: 2016
Subjects: subject: ZB MED; Nutzungsforschung; Sozialforschung; Fokusgruppen; Interviews; Leigitimation; Studie; Nutzung; Wissenschaft; Arbeitsweisen; Lizensierung; Discovery; Publikationsberatung; Forschungsdaten; Moderation; Fragebogen

description: Im ersten Kapitel wird zunächst das Fokusgruppeninterview als Methode in den einzelnen Ablaufschritten erläutert, wie sie „im Lehrbuch“ stehen. Das zweite Kapitel stellt dann, nach einer kurzen Einordnung in die besondere Situation von ZB MED zum entsprechenden Zeitpunkt, den praktischen Ablauf bei der Umsetzung vor und liefert einige Hinweise auf Herausforderungen im Detail. Das dritte Kapitel wiederum präsentiert einige zentrale Ergebnisse aus den Fokusgruppeninterviews als Aussagen von Forschenden und „Multiplikatorinnen und Multiplikatoren“ in den Lebenswissenschaften zu aktuellen Herausforderungen ihrer Arbeit und möglicher Beiträge von ZB MED. Die Anlage bietet eine übersichtliche Checkliste, mit der alle Interessierten die Möglichkeit haben, diese Methode auch für die eigene Arbeit sinnvoll zu nutzen.
description: Informationspraxis, Bd. 2, Nr. 2 (2016)
Thermodynamics of two-component log-gases with alternating charges
Creators: name: Samaj, Ladislav
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a one-dimensional gas of positive and negative unit charges interacting via a logarithmic potential, which is in thermal equilibrium at the (dimensionless) inverse temperature $β$. In a previous paper [Samaj, L.: J. Stat. Phys. 105, 173-191 (2001)], the exact thermodynamics of the unrestricted log-gas of pointlike charges was obtained using an equivalence with a (1+1)-dimensional boundary sine-Gordon model. The present aim is to extend the exact study of the thermodynamics to the log-gas on a line with alternating $\pm$ charges. The formula for the ordered grand partition function is obtained by using the exact results of the Thermodynamic Bethe ansatz. The complete thermodynamics of the ordered log-gas with pointlike charges is checked by a small-$β$ expansion and at the collapse point $β_c=1$. The inclusion of a small hard core around particles permits us to go beyond the collapse point. The differences between the unconstrained and ordered versions of the log-gas are pointed out.
description: 23 pages, 4 figures
Three-feature model to reproduce the topology of citation networks and the effects from authors' visibility on their h-index
Creators: name: Amancio, Diego R.
name: Oliveira, Osvaldo N.
name: Costa, Luciano da F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Digital Libraries (cs.DL)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Various factors are believed to govern the selection of references in citation networks, but a precise, quantitative determination of their importance has remained elusive. In this paper, we show that three factors can account for the referencing pattern of citation networks for two topics, namely "graphenes" and "complex networks", thus allowing one to reproduce the topological features of the networks built with papers being the nodes and the edges established by citations. The most relevant factor was content similarity, while the other two - in-degree (i.e. citation counts) and {age of publication} had varying importance depending on the topic studied. This dependence indicates that additional factors could play a role. Indeed, by intuition one should expect the reputation (or visibility) of authors and/or institutions to affect the referencing pattern, and this is only indirectly considered via the in-degree that should correlate with such reputation. Because information on reputation is not readily available, we simulated its effect on artificial citation networks considering two communities with distinct fitness (visibility) parameters. One community was assumed to have twice the fitness value of the other, which amounts to a double probability for a paper being cited. While the h-index for authors in the community with larger fitness evolved with time with slightly higher values than for the control network (no fitness considered), a drastic effect was noted for the community with smaller fitness.
A Generalized Fractional Calculus of Variations
Creators: name: Odzijewicz, Tatiana
name: Malinowska, Agnieszka B.
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optimization and Control (math.OC)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 49K05, 49K21, 26A33, 34A08

description: We study incommensurate fractional variational problems in terms of a generalized fractional integral with Lagrangians depending on classical derivatives and generalized fractional integrals and derivatives. We obtain necessary optimality conditions for the basic and isoperimetric problems, transversality conditions for free boundary value problems, and a generalized Noether type theorem.
description: This is a preprint of a paper whose final and definitive form will appear in Control and Cybernetics. Paper submitted 01-Oct-2012; revised 25-March-2013; accepted for publication 17-April-2013
Blockwise SURE Shrinkage for Non-Local Means
Creators: name: Wu, Yue
name: Tracey, Brian
name: Natarajan, Premkumar
name: Noonan, Joseph P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this letter, we investigate the shrinkage problem for the non-local means (NLM) image denoising. In particular, we derive the closed-form of the optimal blockwise shrinkage for NLM that minimizes the Stein's unbiased risk estimator (SURE). We also propose a constant complexity algorithm allowing fast blockwise shrinkage. Simulation results show that the proposed blockwise shrinkage method improves NLM performance in attaining higher peak signal noise ratio (PSNR) and structural similarity index (SSIM), and makes NLM more robust against parameter changes. Similar ideas can be applicable to other patchwise image denoising techniques.
title: Éditorial
title: Le cluster de bioéconomie circulaire territorialisée, instrument d’une nouvelle dynamique des systèmes alimentaires et des espaces ruraux
titleType: Subtitle
Creators: name: Rastoin, Jean-Louis
Publisher: name: Classiques Garnier
Year: 2019
Subjects: subject: Bioéconomie
subject: Territoire
subject: Système alimentaire
subject: Développement rural
subject: Bioeconomy
subject: Territory
subject: Food system
subject: Rural development

description: Alors que la fracture entre espaces ruraux et grandes métropoles ne cesse de se creuser et que la pression des crises sociales, environnementales et/ou économiques touche une majorité de pays dans le monde, des modèles innovants d’entreprises doivent être imaginés. Les clusters de bioéconomie circulaire territorialisés formés de réseaux d’entreprises responsables et durables pourraient constituer le socle de systèmes alimentaires capables de redynamiser le monde rural.
description: As the divide between rural areas and large cities continues to widen and the pressure of social, environmental and/or economic crises affects a majority of countries in the world, innovative business models must be imagined. Territorialized circular bioeconomy clusters made up of networks of responsible and sustainable enterprises could constitute the bedrock of food systems capable of revitalizing the rural world.
The Taylor expansion at past time-like infinity
Creators: name: Friedrich, Helmut
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the initial value problem for the conformal field equations with data given on a cone ${\cal N}_p$ with vertex $p$ so that in a suitable conformal extension the point $p$ will represent past time-like infinity $i^-$, the set ${\cal N}_p \setminus \{p\}$ will represent past null infinity ${\cal J}^-$, and the freely prescribed (suitably smooth) data will acquire the meaning of the incoming {\it radiation field} for the prospective vacuum space-time. It is shown that: (i) On some coordinate neighbourhood of $p$ there exist smooth fields which satisfy the conformal vacuum field equations and induce the given data at all orders at $p$. The Taylor coefficients of these fields at $p$ are uniquely determined by the free data. (ii) On ${\cal N}_p$ there exists a unique set of fields which induce the given free data and satisfy the transport equations and the inner constraints induced on ${\cal N}_p$ by the conformal field equations. These fields and the fields which are obtained by restricting the functions considered in (i) to ${\cal N}_p$ coincide at all orders at $p$.
description: 40 pages
Dual conformal constraints and infrared equations from global residue theorems in N=4 SYM theory
Creators: name: Broedel, Johannes
name: He, Song
Publisher: name: New York, NY : Springer International Publishing
Year: 2010
Subjects: subject: Supersymmetric gauge theory
subject: Duality in Gauge Field Theories
subject: gauge-theory amplitudes
subject: one-loop amplitudes
subject: super-yang-mills
subject: tree amplitudes
subject: qcd amplitudes
subject: unitarity
subject: factorization
subject: order
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Infrared equations and dual conformal constraints arise as consistency conditions on loop amplitudes in N=4 super Yang-Mills theory. These conditions are linear relations between leading singularities, which can be computed employing the recently proposed Grassmannian integral in N=4 super Yang-Mills theory. Examples for infrared equations have been shown to be implied by global residue theorems in the Grassmannian picture. Both dual conformal constraints and infrared equations are mapped explicitly to global residue theorems for one-loop next-to-maximally-helicity-violating amplitudes. In addition, the identity relating the BCFW and its parity-conjugated form of tree-level amplitudes, is shown to emerge from a particular combination of global residue theorems.
Performance of a 967 nm CW diode end-pumped Er:GSGG laser at 2.79 Micrometer
Creators: name: Wu, Z. H.
name: Sun, D. L.
name: Wang, S. Z.
name: Luo, J. Q.
name: Li, X. L.
name: Huang, L.
name: Hu, A. L.
name: Tang, Y. Q.
name: Guo, Q.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrated a 967 nm diode end-pumped Er:GSGG laser operated at 2.794 Micrometer with spectrum width 3.6 nm in the continuous wave(CW) mode. The maximum output power of 440 mW is obtained at an incident pumping power of 3.4 W, which corresponds to an optical-to-optical efficiency of 13% and slope efficiency of 13.2%. The results suggest that short cavity and efficient cooling setup for crystal are advantageous to improve laser performance.
description: 10 Pages, 7 Figures,Accepted for publication in Laser Physics
On a conjecture of Rudin on squares in Arithmetic Progressions
Creators: name: González-Jiménez, Enrique
name: Xarles, Xavier
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Let Q(N;q,a) denotes the number of squares in the arithmetic progression qn+a, for n=0, 1,...,N-1, and let Q(N) be the maximum of Q(N;q,a) over all non-trivial arithmetic progressions qn + a. Rudin's conjecture asserts that Q(N)=O(Sqrt(N)), and in its stronger form that Q(N)=Q(N;24,1) if N=> 6. We prove the conjecture above for 6<=N<=52. We even prove that the arithmetic progression 24n+1 is the only one, up to equivalence, that contains Q(N) squares for the values of N such that Q(N) increases, for 7<=N<=52 (hence, for N=8,13,16,23,27,36,41 and 52). This allow us to assert, what we have called Super-Strong Rudin's Conjecture: let be N=GP_k+1=> 8 for some integer k, where GP_k is the k-th generalized pentagonal number, then Q(N)=Q(N;q,a) with gcd(q,a) squarefree and q> 0 if and only if (q,a)=(24,1).
Erratum to: AdS(6) solutions of type II supergravity (vol 11, 099, 2014)
Creators: name: Apruzzi, Fabio
name: Fazzi, Marco
name: Passias, Achilleas
name: Rosa, Dario
name: Tomasiello, Alessandro
Publisher: name: New York, NY : Springer International Publishing
Year: 2015
Subjects: subject: Flux Compactifications
subject: AdS-CFT Correspondence
subject: Pure Spinor
subject: Near-horizon Limit
subject: Massive IIA
subject: Supersymmetric Solution
subject: IIB Supergravity
subject: Eleven-dimensional Supergravity
subject: Two-dimensional Space
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Erratum to: AdS(6) solutions of type II supergravity. Journal of High Energy Physics 2014 (2014), Nr. 11. DOI: http://dx.doi.org/10.1007/JHEP11(2014)099
Nicandra physalodes
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: N. physalodes (L.) Gärtner Cat. L. Adventiv. 3: Visp (J. Muret; hier neuerdings beobachtet: Thommen 1950).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Paul J. Crutzen – a pioneer in Earth system science and a founding member of the journal “Atmospheric Chemistry and Physics”
Creators: name: Müller, Rolf
name: Pöschl, Uli
name: Koop, Thomas
name: Peter, Thomas
name: Carslaw, Ken
Publisher: name: Forschungzentrum Jülich
Year: 2023

description: doi:10.5194/egusphere-2023-1467
Satellite probing General Relativity and its extensions and Kolmogorov analysis
Creators: name: Gurzadyan, V. G.
name: Ciufolini, I.
name: Sargsyan, S.
name: Yegorian, G.
name: Mirzoyan, S.
name: Paolozzi, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We apply the Kolmogorov statistic to analyse the residual data of two LAGEOS satellites on General Relativistic Lense-Thirring effect, and show that it reveals a tiny difference in the properties of the satellites, possibly related to Yarkovsky-Rubincam effect. The recently launched LAser RElativity Satellite (LARES) can provide constraints to the extensions of General Relativity such as the Chern-Simons (CS) gravity with metric coupled to a scalar field through the Pontryagin density, so an explicit dependence on the frame dragging measurements vs the CS parameter is given.
description: to match the published version, 4 pages, 3 figures
Mathematics for some classes of networks
Creators: name: Malyshev, V. A.
name: Zamyatin, A. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Network (as a general notion) is not a mathematical object - there is no even any definition. However, there is a lot of good rigorous mathematics for well-defined classes of networks. In sections 1-3 we give a short overview of classes of networks which interested the authors for some time. In section 4 we consider in detail a new class of networks, related to markets with many agents.
description: 12 pages