cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Die bedingte Power in der Überlebenszeitanalyse unter Berücksichtigung von Überlebensfraktionen
Creators: name: Kühnapfel, Andreas
name: Schwarzenberger, Fabian
name: Scholz, Markus
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: Exponentielles Überleben
subject: Gammaverteiltes Überleben
subject: Non-Mixture-Modell
subject: Proportionale Hazards
subject: Randomisierte klinische Studie
subject: Überlebensfraktion
subject: Weibull-verteiltes Überleben
subject: 610 Medical sciences; Medicine

description: Einleitung: Klinische Studien mit Überlebenszeitendpunkt sind häufig zeitaufwendig und kostspielig. Dementsprechend werden geplante Zwischenauswertungen durchgeführt. Ist die Schätzung der betrachteten Effektgröße zum Zeitpunkt der Zwischenauswertung weit von dem klinisch[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: GMDS 2015; 60. Jahrestagung der Deutschen Gesellschaft für Medizinische Informatik, Biometrie und Epidemiologie e.V. (GMDS)
Disordered quantum wires: microscopic origins of the DMPK theory and Ohm's law
Creators: name: Bachmann, Sven
name: Butz, Maximilian
name: De Roeck, Wojciech
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the electronic transport properties of the Anderson model on a strip, modeling a quasi one-dimensional disordered quantum wire. In the literature, the standard description of such wires is via random matrix theory (RMT). Our objective is to firmly relate this theory to a microscopic model. We correct and extend previous work (arXiv:0912.1574) on the same topic. In particular, we obtain through a physically motivated scaling limit an ensemble of random matrices that is close to, but not identical to the standard transfer matrix ensembles (sometimes called TOE, TUE), corresponding to the Dyson symmetry classes β=1,2. In the β=2 class, the resulting conductance is the same as the one from the ideal ensemble, i.e.\ from TUE. In the β=1 class, we find a deviation from TOE. It remains to be seen whether or not this deviation vanishes in a thick-wire limit, which is the experimentally relevant regime. For the ideal ensembles, we also prove Ohm's law for all symmetry classes, making mathematically precise a moment expansion by Mello and Stone. This proof bypasses the explicit but intricate solution methods that underlie most previous results.
description: Corrects and extends arXiv:0912.1574
Historical changes in semantic weights of sub-word units
Creators: name: Xu, Yang
name: Zhang, Zheng-Sheng
Publisher: name: Zenodo
Year: 2021

description: In this chapter, we present a computational study on how the weight of sub-word
 units in determining word meanings evolves chronologically in different languages.
 Sub-word units, e.g., morphemes, syllables etc., play variable roles in
 determining word meanings. Some morphemes in English have standalone lexical
 meanings (e.g., the root) while others function more as morpho-syntactic markers (e.g.,
 the bound morphemes such as -ness etc.) The semantic weight of sub-word units
 changes over time; for instance, some ancient characters in Chinese or ancient
 prefixes in English no longer carry clear semantic meanings. The goal of this chapter
 is to characterize such a change with computational methods. The semantic weight
 of sub-word units can be captured by word embedding models (and their variants).
 We present results from two substudies. In Study 1, we propose a novel neural
 network-based word embedding model to model the semantic weights from
 sub-word units. We draw a comparison between Chinese and Indo-European languages
 in how the semantic weights of sub-words change over time, and show that the
 weights of characters in Chinese (字 zi, the basic sub-word unit in Chinese) are
 higher in ancient Chinese and lower in modern Chinese, while the opposite trend
 is observed in Indo-European languages. This is in accordance with theories about
 monosyllabic-to-bisyllabic shift in Chinese, and the synthetic-to-analytic shift
 conjecture in Indo-European languages. In Study 2, we apply a different embedding
 model on another corpus to confirm the finding in Study 1. Although the
 chronological pattern of semantic weight found is inconsistent with that in Study 1, the
 results are still meaningful in having discovered the presence of historical changes
 of sub-word level semantic weights across different corpora and languages.
 Our chapter calls for more systematic studies of the applicability of computational
 embedding methods in modeling the sub-word semantics. Although discrepancies
 are found in current models and corpora, our empirical findings suggest that word
 level semantic composition is a dynamic process which reflects historical changes.
Laser spot position dependent photothermal mode cooling of a micro-cantilever
Creators: name: Fu, Hao
name: Liu, Cunding
name: Liu, Yong
name: Chu, Jiaru
name: Cao, Gengyu
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We explore the laser spot position (LSP) dependent photothermal mode cooling of a micro-cantilever in a Fabry-Pérot (FP) cavity. Depending on the LSP along the lever, photothermal coupling to the first two mechanical modes can be either parallel or anti-parallel. This LSP dependent behavior is analyzed theoretically by a simple model, which is in quantitatively agreement with our experimental observation. From simulation, the parallel and anti-parallel coupling region is identified along the lever. We conclude that a more efficient mode cooling may be achieved in the parallel coupling region.
description: 4 pages, 4 figures
title: Missing data imputation in clinical studies – ignorable missingness and sensitivity analysis
Creators: name: Kumke, Thomas
name: Smolen, Josef
name: Strand, Vibeke
name: Mountian, Irina
name: Molenberghs, Geert
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: missing data
subject: multiple imputation
subject: pattern-mixture models
subject: rheumatoid arthritis
subject: 610 Medical sciences; Medicine

description: Introduction: Missing data are a common problem in longitudinal clinical studies since they affect the reliability of the results, reduce their power and introduce bias. The selection of the appropriate imputation method strongly depends on the appropriateness of the statistical assumptions to reduce[for full text, please go to the a.m. URL]
description: GMDS 2015; 60. Jahrestagung der Deutschen Gesellschaft für Medizinische Informatik, Biometrie und Epidemiologie e.V. (GMDS)
Spin controlled nanomechanics induced by single-electron tunneling
Creators: name: Radić, Danko
name: Nordenfelt, Anders
name: Kadigrobov, Anatoli M.
name: Shekhter, Robert I.
name: Jonson, Mats
name: Gorelik, Leonid Y.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider dc-electronic transport through a nanowire suspended between normal- and spin-polarized metal leads in the presence of an external magnetic field. We show that magnetomotive coupling between the electrical current through the nanowire and vibrations of the wire may result in self excitation of mechanical vibrations. The self-excitation mechanism is based on correlations between the occupancy of the quantized electronic energy levels inside the nanowire and the velocity of the nanowire. We derive conditions for the occurrence of the instability and find stable regimes of mechanical oscillations.
description: 5 pages, 3 figures
Dispersion and wavefunction symmetry in cold atoms experiencing artificial gauge fields
Creators: name: Yanay, Yariv
name: Mueller, Erich
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We analyze the single particle quantum mechanics of an atom whose dispersion is modified by spin orbit coupling to Raman lasers. We calculate how the novel dispersion leads to unusual single particle physics. We focus on the symmetry of the ground state wavefunction in different potentials.
description: 5 pages, 7 figures
Difference bodies in complex vector spaces
Creators: name: Abardia, Judit
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 52B45, 52A39

description: A complete classification is obtained of continuous, translation invariant, Minkowski valuations on an m-dimensional complex vector space which are covariant under the complex special linear group.
description: 17 pages
On the reaction time of some synchronous systems
Creators: name: Garnier, Ilias
name: Aussaguès, Christophe
name: David, Vincent
name: Vidal-Naquet, Guy
Publisher: name: arXiv
Year: 2011
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: This paper presents an investigation of the notion of reaction time in some synchronous systems. A state-based description of such systems is given, and the reaction time of such systems under some classic composition primitives is studied. Reaction time is shown to be non-compositional in general. Possible solutions are proposed, and applications to verification are discussed. This framework is illustrated by some examples issued from studies on real-time embedded systems.
description: In Proceedings ICE 2011, arXiv:1108.0144
Chaining algorithms and historical adjective extension
Creators: name: Grewal, Karan
name: Xu, Yang
Publisher: name: Zenodo
Year: 2021

description: Natural language relies on a finite lexicon to express a potentially infinite set of ideas. This tension often results in the innovative reuse of existing words to describe emerging ideas. In this chapter, we take a computational perspective to examine how English adjectives extend their range over time to modify nouns and form previously unattested adjective-noun pairs. We hypothesize that how novel adjective-noun pairings emerge is non-arbitrary and follows a process of chaining, whereby novel noun referents for an adjective link to existing nouns modified by the same adjective that are close in semantic space. We test this proposal by exploring a set of probabilistic models that predict adjective-noun pairs from a historical text corpus (Google Books) that spans the past 150 years. Our findings across three diverse sets of adjectives support a chaining mechanism sensitive to local semantic neighbourhood -- formulated as an exemplar model of categorization similar to the Generalized Context Model. These findings mirror existing work on chaining in the historical growth of grammatical categories. We discuss the limitations and implications of our approach toward a general theory of word meaning extension in natural language.
Low-temperature heat transport of the layered spin-dimer compound Ba_3Mn_2O_8
Creators: name: Ke, W. P.
name: Wang, X. M.
name: Fan, C.
name: Zhao, Z. Y.
name: Liu, X. G.
name: Chen, L. M.
name: Li, Q. J.
name: Zhao, X.
name: Sun, X. F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the study on the low-temperature heat transport of Ba_3Mn_2O_8 single crystal, a layered spin-dimer compound exhibiting the magnetic-field-induced magnetic order or the magnon Bose-Einstein condensation. The thermal conductivities (κ) along both the ab plane and the c axis show nearly isotropic dependence on magnetic field, that is, κis strongly suppressed with increasing field, particularly at the critical fields of magnetic phase transitions. These results indicate that the magnetic excitations play a role of scattering phonons and the scattering effect is enhanced when the magnetic field closes the gap in the spin spectrum. In addition, the magnons in the BEC state of this materials do not show notable ability of carrying heat.
description: 6 pages, 6 figures, accepted for publication in Phys. Rev. B
Limnophyes Eaton 1875
Creators: name: Armitage, Brian J.
name: Andersen, Trond
name: Giłka, Wojciech
name: Castillo Sánchez, Kayla N.
name: Ríos González, Tomás A.
name: Aguirre, Yusseff P.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Limnophyes

description: Limnophyes Eaton, 1875
A genus of>90 named species that occur in all zoogeographical regions except Oceania. Saether (1990a, b) revised the Holarctic, Afrotropical, and Neotropical species of the genus. The larvae are eurytopic, including aquatic, semiterrestrial, and terrestrial habitats (Andersen et al. 2013).
description: Published as part of Armitage, Brian J., Andersen, Trond, Giłka, Wojciech, Castillo Sánchez, Kayla N., Ríos González, Tomás A. & Aguirre, Yusseff P., 2025, The Diptera of Panama. II. A first benchmark for the family Chironomidae, pp. 201-240 in Zootaxa 5613 (2) on page 224, DOI: 10.11646/zootaxa.5613.2.1, http://zenodo.org/record/15224174
Cross-lingual laws of semantic change
Creators: name: Ana-Sabina Uban
name: Ciobanu, Alina Maria
name: Dinu, Liviu P.
Publisher: name: Zenodo
Year: 2021

description: Semantic divergence in related languages is a key concern of historical
 linguistics. In order to complement existing research on semantic change, which in most
 previous approaches relies on the comparative analysis of diachronic corpora, we
 propose a novel approach for measuring semantic shifts synchronically. In this
 chapter, we investigate semantic change across languages by measuring the
 semantic distance of cognate sets using cross-lingual word embeddings. We define a
 measure of cognate divergence and show how it can be used as a measure of
 language semantic divergence. We propose an algorithm to detect and correct false
 friends as an application for natural language processing. We hypothesize that false
 friends fall on a spectrum, and define a corresponding notion of “falseness” and a
 methodology for its quantification. We evaluate the algorithm based on WordNet
 and on manually curated lists of true cognates and false friends, showing accuracy
 values exceeding 80%, and we show how choosing a falseness level as a threshold
 for detecting false friends can affect the performance of the detection algorithm.
 We further study the properties of the semantic divergence of cognates, and verify
 whether hypothesized laws of semantic change (namely the law of conformity and
 the law of innovation) hold in the multilingual setting, thus formulating the first
 laws of cross-lingual semantic change. We further study the mathematical
 relation between polysemy and frequency on the one hand, and falseness on the other
 hand, and identify polynomials that optimally model their relationship, leading to
 equations describing cross-lingual semantic change in relation to word properties.
Self-consistent modelling of hot plasmas within non-extensive Tsallis' thermostatistics
Creators: name: Pain, Jean-Christophe
name: Teychenné, Denis
name: Gilleron, Franck
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A study of the effects of non-extensivity on the modelling of atomic physics in hot dense plasmas is proposed within Tsallis' statistics. The electronic structure of the plasma is calculated through an average-atom model based on the minimization of the non-extensive free energy.
description: submitted to "Eur. Phys. J. D"
Inclusive Open Charm Production in pp and Pb-Pb collisions with the ALICE Detector
Creators: name: Bala, Renu
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: ALICE is the dedicated heavy-ion experiment at the LHC. Its main physics goal is to study the properties of strongly-interacting matter at conditions of high energy density (>10 GeV/ fm^3) and high temperature (> 0.5 GeV) expected to be reached in central Pb-Pb collisions. Charm and beauty quarks are powerful tools to investigate this high density and strongly interacting state of matter since they are produced in initial hard scatterings that are therefore generated early in the system evolution and probe its hottest, densest stage. The measurement of the charm production cross sections in pp collisions provides an interesting insight into QCD processes and is crucial as a reference for heavy ion studies. We present open charm cross section measurements in pp collisions at \sqrt{s} = 7 TeV and \sqrt{s}=2.76 TeV in the central rapidity region. In addition, the first measurement of nuclear modification factor of D-meson in Pb-Pb collisions at \sqrt{s}= 2.76 TeV is shown.
description: 6 page, 5 figures, Conference Proceeding to be published in Journal of Physics
Numerical modelling of a flash-flood event at Peribán de Ramos, Michoacán (Mexico)
Creators: name: Vázquez, R.
name: Carlón-Allende, T.
name: García-Tenorio, F.
name: Mendiola, F.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
classificationCode: 59999
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Sociology
subject: FOS: Sociology
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: During the afternoon of 23 September 2018, a flash flood event occurred at Peribán de Ramos (Michoacán, Mexico). This event was triggered by 2-h precipitation of 58 mm, affecting at least 100 families, damaging 30 houses and killing 8 people. We present the first assessment of this event, for which we carried out stratigraphic descriptions, took sedimentological samples of the deposits and performed numerical simulations with the FLO-2D model to recreate the flow. Our results present a good fit with the flow heights, velocities, and the distribution of the flood zones observed in the field. We additionally performed a flood hazard assessment based on a rainfall frequency analysis for extreme events of 2-h duration at different return periods. Results show that even the 2-year event would reach flow depths >5 m and velocities exceeding 6.5 m/s, causing the overspill of Cutio river, affecting ~1500 inhabitants and avocado farming lands, causing a bigger impact on the population’s incomes and their way of life. We consider that these types of events could become more frequent and of major magnitude due to the change in land cover and land use, obstruction of natural drainages and changes in precipitation patterns in response to climate change.
The ionized gas in the CALIFA early-type galaxies I. Mapping two representative cases: NGC 6762 and NGC 5966
Creators: name: Kehrig, C.
name: Monreal-Ibero, A.
name: Papaderos, P.
name: Vilchez, J. M.
name: Gomes, J. M.
name: Masegosa, J.
name: Sanchez, S. F.
name: Lehnert, M. D.
name: Fernandes, R. Cid
name: Bland-Hawthorn, J.
name: Bomans, D. J.
name: Marquez, I.
name: Mast, D.
name: Aguerri, J. A. L.
name: Lopez-Sanchez, A. R.
name: Marino, R. A.
name: Pasquali, A.
name: Perez, I.
name: Roth, M. M.
name: Sanchez-Blazquez, P.
name: Ziegler, B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: As part of the CALIFA survey, we conducted a thorough 2D analysis of the ionized gas in two E/S0 galaxies, NGC6762 and NGC5966, aiming to shed light on the nature of their warm ionized ISM. We present optical IFS obtained with the PMAS/PPAK spectrophotometer. To recover the nebular lines, we subtracted the underlying stellar continuum from the observed spectra using the STARLIGHT code. In NGC6762, the ionized gas and stellar emission display similar morphologies, while the emission line morphology is elongated in NGC5966, spanning ~6 kpc, and is oriented roughly orthogonal to the major axis of the stellar continuum ellipsoid. Whereas gas and stars are kinematically aligned in NGC6762, the gas is kinematically decoupled from the stars in NGC5966. A decoupled rotating disk or an ionization cone are two possible interpretations of the elongated ionized gas structure in NGC5966. The latter would be the first ionization cone of such a dimension detected within a weak emission-line galaxy. Both galaxies have weak emission-lines relative to the continuum [EW(Ha)< 3 A] and have low excitation, log([OIII]5007/Hb) < 0.5. Based on optical diagnostic ratios ([OIII]5007/Hb,[NII]6584/Ha,[SII]6717,6731/Ha,[OI]6300/Ha), both objects contain a LINER nucleus and an extended LINER-like gas emission. The emission line ratios do not vary significantly with radius or aperture, which indicates that the nebular properties are spatially homogeneous. The gas emission in NGC6762 can be best explained by photoionization by pAGB stars without the need of invoking any other excitation mechanism. In the case of NGC5966, the presence of a nuclear ionizing source seems to be required to shape the elongated gas emission feature in the ionization cone scenario, although ionization by pAGB stars cannot be ruled out.(abridged)
description: 16 pages, 13 figures, accepted for publication in A&A
Self-improving Algorithms for Coordinate-wise Maxima
Creators: name: Clarkson, Kenneth L.
name: Mulzer, Wolfgang
name: Seshadhri, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computational Geometry (cs.CG)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: Computing the coordinate-wise maxima of a planar point set is a classic and well-studied problem in computational geometry. We give an algorithm for this problem in the \emph{self-improving setting}. We have $n$ (unknown) independent distributions $\cD_1, \cD_2, ..., \cD_n$ of planar points. An input pointset $(p_1, p_2, ..., p_n)$ is generated by taking an independent sample $p_i$ from each $\cD_i$, so the input distribution $\cD$ is the product $\prod_i \cD_i$. A self-improving algorithm repeatedly gets input sets from the distribution $\cD$ (which is \emph{a priori} unknown) and tries to optimize its running time for $\cD$. Our algorithm uses the first few inputs to learn salient features of the distribution, and then becomes an optimal algorithm for distribution $\cD$. Let $\OPT_\cD$ denote the expected depth of an \emph{optimal} linear comparison tree computing the maxima for distribution $\cD$. Our algorithm eventually has an expected running time of $O(\text{OPT}_\cD + n)$, even though it did not know $\cD$ to begin with. Our result requires new tools to understand linear comparison trees for computing maxima. We show how to convert general linear comparison trees to very restricted versions, which can then be related to the running time of our algorithm. An interesting feature of our algorithm is an interleaved search, where the algorithm tries to determine the likeliest point to be maximal with minimal computation. This allows the running time to be truly optimal for the distribution $\cD$.
description: To appear in Symposium of Computational Geometry 2012 (17 pages, 2 figures)
Distances On Earth'S Surface
Creators: name: Schröer, Harald
Publisher: name: Zenodo
Year: 2015
Subjects: distance,surface,earth,method,revolution ellipsoid,semiaxis,Gauss,Helmert,Jordan,Moritz,short,long,middle

description: Distances on earth's surface are calculated with 3 methods. The earth is assumed as revolution ellipsoid. There is a comparison with a spherical model.
Formation of ultracold metastable RbCs molecules by short-range photoassociation
Creators: name: Gabbanini, C.
name: Dulieu, O.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Ultracold metastable RbCs molecules are observed in a double species MOT through photoassociation near the Rb(5S$_{1/2}$)+Cs(6P$_{3/2}$) dissociation limit followed by radiative stabilization. The molecules are formed in their lowest triplet electronic state and are detected by resonant enhanced two-photon ionization through the previously unobserved $(3)^{3}Π\leftarrow a^{3}Σ^{+}$ band. The large rotational structure of the observed photoassociation lines is assigned to the lowest vibrational levels of the $0^+,0^-$ excited states correlated to the Rb(5P$_{1/2}$)+Cs(6S$_{1/2}$) dissociation limit. This demonstrates the possibility to induce direct photoassociation in heteronuclear alkali-metal molecules at short internuclear distance, as pointed out in [J. Deiglmayr \textit{et al.}, Phys. Rev. Lett. \textbf{101}, 13304 (2008)].
Hinweise für Publikationen der Römisch-Germanischen Kommission
Creators: name: Redaktion, Die
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2020

description: -
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 87 Nr. 2 2009(2012)
Copyright Collectives And Contracts: An Economic Theory Perspective
Creators: name: Watt, Richard
Publisher: name: Zenodo
Year: 2015

description: The existing economic theory of copyright collectives, or copyright management organizations (CMOs) is strongly focused on the benefits of sharing of transaction costs. Here, we appeal to the contractual environment of CMOs to offer a different perspective. Copyright collectives form contracts at two principle points along the supply chain. First, there are the contracts between the collective’s members themselves (the copyright holders), for distribution of the collective’s income. And second there are the licensing contracts that the collective signs with users of the repertory. Using standard economic theory, the paper argues that there are significant efficiency benefits from having copyrights managed as an aggregate repertory, rather than individually, based on risk-pooling and risk-sharing through the contracts between the members themselves. Similarly, there are also aggregation benefits (at least in terms of the profit of the CMO) of licensing only the entire repertory, rather than smaller sub-sets. Interestingly, there is a link between these two theories of the efficiency of collective, rather than individual, management, and it lies at the heart of the theory of syndicates, and the characteristics that imply that the group (or syndicate as a whole) can be considered as a valid “representative”, sharing the same preferences as each individual syndicate member.
Photometric distances to young stars in the inner Galactic disk. I. The L = 314$^{o}$ direction
Creators: name: Carraro, Giovanni
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The spiral structure of the Milky Way is nowadays receiving renewed attention thanks to the combined efforts of observational campaigns in different wavelength regimes, from the optical to the radio. We start in the paper the exploration of a number of key sectors in the inner Milky Way, where the spiral structure is still poorly known. We search for density enhancements of young stars that might plausibly be associated with spiral structure. To this aim we collect sufficiently wide-field UBVI photometry. The intensive usage of U-band photometry ensures robust determination of reddening and hence distance for stars of spectral type earlier than A0, which are well-known spiral arm tracers. The fields we use are large enough to include in most cases well-studied Galactic clusters, which we use as bench-marks to assess the quality and standardisation of the data, and to validate our method. We focus in this paper on the line of sight to the Galactic longitude l= 314$^o$. First of all, we made exhaustive tests to show that our data-set is in the standard system, and calibrated our method using the two open clusters NGC 5617 and Pismis 19 which happen to be in the field, and for which we found estimates of the basic parameters in full agreement with the literature. We then applied the method to the general field stars and detected signatures of three different groups of stars, evenly distributed across the field of view, at 1.5$^{+0.5}_{-0.2}$, 2.5$^{+0.3}_{-0.5}$, and 5.1$^{+1.5}_{-1.1}$ kpc, respectively. These distances are compatible with the location of the nowadays commonly accepted description of the Carina-Sagittarius and Scutum-Crux arms, at heliocentric distance of $\sim$ 2 an 5 kpc,
description: 23 pages, 13 eps figure, in press in Astronomy and Astrophysics
Continuous deformations of the Grover walk preserving localization
Creators: name: Stefanak, Martin
name: Bezdekova, Iva
name: Jex, Igor
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The three-state Grover walk on a line exhibits the localization effect characterized by a non-vanishing probability of the particle to stay at the origin. We present two continuous deformations of the Grover walk which preserve its localization nature. The resulting quantum walks differ in the rate at which they spread through the lattice. The velocities of the left and right-traveling probability peaks are given by the maximum of the group velocity. We find the explicit form of peak velocities in dependence on the coin parameter. Our results show that localization of the quantum walk is not a singular property of an isolated coin operator but can be found for entire families of coins.
Correlating Formal Semantic Models of Reo Connectors: Connector Coloring and Constraint Automata
Creators: name: Jongmans, Sung-Shik T. Q.
name: Arbab, Farhad
Publisher: name: arXiv
Year: 2011
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Over the past decades, coordination languages have emerged for the specification and implementation of interaction protocols for communicating software components. This class of languages includes Reo, a platform for compositional construction of connectors. In recent years, various formalisms for describing the behavior of Reo connectors have come to existence, each of them serving its own purpose. Naturally, questions about how these models relate to each other arise. From a theoretical point of view, answers to these questions provide us with better insight into the fundamentals of Reo, while from a more practical perspective, these answers broaden the applicability of Reo's development tools. In this paper, we address one of these questions: we investigate the equivalence between coloring models and constraint automata, the two most dominant and practically relevant semantic models of Reo. More specifically, we define operators that transform one model to the other (and vice versa), prove their correctness, and show that they distribute over composition. To ensure that the transformation operators map one-to-one (instead of many-to-one), we extend coloring models with data constraints. Though primarily a theoretical contribution, we sketch some potential applications of our results: the broadening of the applicability of existing tools for connector verification and animation.
description: In Proceedings ICE 2011, arXiv:1108.0144
Extended quantum conditional entropy and quantum uncertainty inequalities
Creators: name: Frank, Rupert L.
name: Lieb, Elliott H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Quantum states can be subjected to classical measurements, whose incompatibility, or uncertainty, can be quantified by a comparison of certain entropies. There is a long history of such entropy inequalities between position and momentum. Recently these inequalities have been generalized to the tensor product of several Hilbert spaces and we show here how their derivations can be shortened to a few lines and how they can be generalized. All the recently derived uncertainty relations utilize the strong subadditivity (SSA) theorem; our contribution relies on directly utilizing the proof technique of the original derivation of SSA.
description: 4 pages
Helmut Schlunk y Magin Berenguer, La Pintura Mural Asturiana de los Siglos IX y X
Creators: name: Richert, Gertrud
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Rezension zu: Helmut Schlunk y Magin Berenguer, La Pintura Mural Asturiana de los Siglos IX y X. Excma. Diputación Provincial de Asturias. Distribuidor exclusivo Leon Sánchez-Cuesta, Serrano 29. Madrid 1957, 4°, 188 S., 183 Abb., 50 Taf.
description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 11 Nr. 8 (1958): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Retinol-binding protein 4 and its potential roles in hypercholesterolemia revealed by proteomics
Creators: name: Jugnam-Ang, Watcharapong
name: Pannengpetch, Supitcha
name: Isarankura-Na-Ayudhya, Patcharee
name: Thippakorn, Chadinee
name: Isarankura-Na-Ayudhya, Chartchalerm
name: Lawung, Ratana
name: Prachayasittikul, Virapong
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2015
Subjects: hypercholesterolemia
proteomics
retinol-binding protein
inflammation

description: Effects of hypercholesterolemia on alterations of serum proteins have not been fully elucidated. Herein, using two-dimensional gel electrophoresis (2-DE) in conjunction with LC-MS searching has successfully been carried out to investigate the change of protein expression profiles as consequences of raised blood cholesterol at different levels (normal group: total cholesterol  200 mg/dL; borderline high group: total cholesterol 200-239 mg/dL; and high group: total cholesterol ≥ 240 mg/dL) (n = 45). Results revealed that down-regulation of retinol-binding protein 4 (RBP4) (-2.26 fold), transthyretin (-1.25 fold) and gelsolin (-1.47 fold) was observed in the high group. Meanwhile, the other proteins such as haptoglobin, complement factor B and CD5 antigen-like protein were up-regulated upto +3.24, +1.96 and +2.04 fold, respectively. Confirmation by Western blotting revealed a significant reduction of RBP4 (approximately 50 %) in individual samples derived from the high group. Presumptive conclusion can be drawn that down-regulation of RBP4 might be attributable to the inflammation of adipocytes caused by the release of proinflammatory cytokines (e.g. tumor necrosis factor α and interleukin-1β) from adipose tissues. Moreover, the decrease of transthyretin might also be taken into accounts since it is known that the transthyretin usually forms complex with RBP4 to prevent glomerular filtration and excretion through the kidney. The suppressing effect on RBP4 should be potentiated by the increase of complement factor B and CD5 antigen-like protein, which rendered the adipose tissues to overwhelm the liberation of RBP4 to blood circulation by metabolic and inflammatory processes. Such inflammation could further modulate the induction of cytokine release (e.g. IL-6 and IL-1β), resulting in the synthesis of acute phase protein, in particular, haptoglobin and C-reactive proteins from hepatocytes. However, the mechanism of gelsolin reduction remains unclear. Among these differentially expressed proteins, the RBP4 has been proposed as a major linkage between hypercholesterolemia, adipose tissues, liver and kidney, which is believed to be a potential biomarker for metabolic and cardiovascular disorders associated with dyslipidemia in the future.
description: EXCLI Journal; 14:Doc999; ISSN 1611-2156
Inhalt
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 23 Nr. 9 (1970): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
A Note on Neutron Capture Correlation Signals, Backgrounds, and Efficiencies
Creators: name: Bowden, N. S.
name: Sweany, M.
name: Dazeley, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A wide variety of detection applications exploit the timing correlations that result from the slowing and eventual capture of neutrons. These include capture-gated neutron spectrometry, multiple neutron counting for fissile material detection and identification, and antineutrino detection. There are several distinct processes that result in correlated signals in these applications. Depending on the application, one class of correlated events can be a background that is difficult to distinguish from the class that is of interest. Furthermore, the correlation timing distribution depends on the neutron capture agent and detector geometry. Here, we explain the important characteristics of the neutron capture timing distribution, making reference to simulations and data from a number of detectors currently in use or under development. We point out several features that may assist in background discrimination, and that must be carefully accounted for if accurate detection efficiencies are to be quoted.
description: 7 pages, 7 figures; Submitted to Nuclear Instrument and Methods A
On the nature of QPO phase lags in black hole candidates
Creators: name: Shaposhnikov, Nikolai
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Observations of quasi-periodic oscillations (QPOs) in X-ray binaries hold a key to understanding many aspects of these enigmatic systems. Complex appearance of the Fourier phase lags related to QPOs is one of the most puzzling observational effects in accreting black holes. In this Letter we show that QPO properties, including phase lags, can be explained in a framework of a simple scenario, where the oscillating media provides a feedback on the emerging spectrum. We demonstrate that the QPO waveform is presented by the product of a perturbation and a time delayed response factors, where the response is energy dependent. The essential property of this effect is its non-linear and multiplicative nature. Our multiplicative reverberation model successfully describes the QPO components in energy dependent power spectra as well as the appearance of the phase lags between signal in different energy bands. We apply our model to QPOs observed by Rossi X-ray Timing Explorer in BH candidate XTE J1550-564. We briefly discuss the implications of the observed energy dependence of the QPO reverberation times and amplitudes to the nature of the power law spectral component and its variability.
description: 5 pages, 4 figures, ApJ Letters, accepted for publication
Magnetic properties of the low-dimensional spin-1/2 magnet α-Cu_2As_2O_7
Creators: name: Arango, Y. C.
name: Vavilova, E.
name: Abdel-Hafiez, M.
name: Janson, O.
name: Tsirlin, A. A.
name: Rosner, H.
name: Drechsler, S. -L.
name: Weil, M.
name: Nénert, G.
name: Klingeler, R.
name: Volkova, O.
name: Vasiliev, A.
name: Kataev, V.
name: Büchner, B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In this work we study the interplay between the crystal structure and magnetism of the pyroarsenate α-Cu_2As_2O_7 by means of magnetization, heat capacity, electron spin resonance and nuclear magnetic resonance measurements as well as density functional theory (DFT) calculations and quantum Monte Carlo (QMC) simulations. The data reveal that the magnetic Cu-O chains in the crystal structure represent a realization of a quasi-one dimensional (1D) coupled alternating spin-1/2 Heisenberg chain model with relevant pathways through non-magnetic AsO_4 tetrahedra. Owing to residual 3D interactions antiferromagnetic long range ordering at T_N\simeq10K takes place. Application of external magnetic field B along the magnetically easy axis induces the transition to a spin-flop phase at B_{SF}~1.7T (2K). The experimental data suggest that substantial quantum spin fluctuations take place at low magnetic fields in the ordered state. DFT calculations confirm the quasi-one-dimensional nature of the spin lattice, with the leading coupling J_1 within the structural dimers. QMC fits to the magnetic susceptibility evaluate J_1=164K, the weaker intrachain coupling J'_1/J_1 = 0.55, and the effective interchain coupling J_{ic1}/J_1 = 0.20.
description: Accepted for publication in Physical Review B
title: „Lernst Du schon, oder liest Du noch? – Lernwerkstatt“. Projektentwicklung und erste Ergebnisse eines longitudinalen Workshops zur Förderung von selbstreguliertem Lernen für Humanmedizin-Studierende
Creators: name: Tauschel, Diethard
name: Thye, Miriam
name: Scheffer, Christian
name: Edelhäuser, Friedrich
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Fragestellung/Einleitung: Lernen ist eine zentrale, lebenslang entwickelbare Kern-Kompetenz. Der Eintritt in das Studium ruft Studierende zur Transformation ihres bisherigen Lernverhaltens auf und stellt Institutionen vor besondere Herausforderungen zur Gestaltung der Studieneingangsphase. Zu ihr[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: Gemeinsame Jahrestagung der Gesellschaft für Medizinische Ausbildung (GMA) und des Arbeitskreises zur Weiterentwicklung der Lehre in der Zahnmedizin (AKWLZ)
Refining a Quantitative Information Flow Metric
Creators: name: Hussein, Sari Haj
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: We introduce a new perspective into the field of quantitative information flow (QIF) analysis that invites the community to bound the leakage, reported by QIF quantifiers, by a range consistent with the size of a program's secret input instead of by a mathematically sound (but counter-intuitive) upper bound of that leakage. To substantiate our position, we present a refinement of a recent QIF metric that appears in the literature. Our refinement is based on slight changes we bring into the design of that metric. These changes do not affect the theoretical premises onto which the original metric is laid. However, they enable the natural association between flow results and the exhaustive search effort needed to uncover a program's secret information (or the residual secret part of that information) to be clearly established. The refinement we discuss in this paper validates our perspective and demonstrates its importance in the future design of QIF quantifiers.
description: 7 pages. 3 figures. Proceedings of the 5th IFIP International Conference on New Technologies, Mobility and Security (NTMS 2012), Istanbul, Turkey, Proceedings of the 5th IFIP International Conference on New Technologies, Mobility and Security (NTMS 2012), Istanbul, Turkey
title: Einfluss verschiedener Unterrichtseinheiten auf Selbstsicherheit und den erwarteten Handlungserfolg bei Studierenden
Creators: name: Giese, Hannah
name: Geuenich, Katja
name: Dilly, Marc
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Fragestellung/Einleitung: Im Rahmen des landwirtschaftlichen Praktikums führen Studierende des zweiten bzw. dritten Semesters selbstständig eine transrektale gynäkologische Untersuchung (TGU) beim Rind durch. Zur Vorbereitung auf die TGU beim Rind fand bisher eine theoretische Unterweisung[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: Gemeinsame Jahrestagung der Gesellschaft für Medizinische Ausbildung (GMA) und des Arbeitskreises zur Weiterentwicklung der Lehre in der Zahnmedizin (AKWLZ)
Quantum memory in warm rubidium vapor with buffer gas
Creators: name: Bashkansky, Mark
name: Fatemi, Fredrik K.
name: Vurgaftman, Igor
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The realization of quantum memory using warm atomic vapor cells is appealing because of their commercial availability and the perceived reduction in experimental complexity. In spite of the ambiguous results reported in the literature, we demonstrate that quantum memory can be implemented in a single cell with buffer gas using the geometry where the write and read beams are nearly co-propagating. The emitted Stokes and anti-Stokes photons display cross-correlation values greater than 2, characteristic of quantum states, for delay times up to 4 microseconds.
description: 3 pages. Accepted to Optics Letters
title: „Ich weiß einfach nicht, wo ich anfangen soll…“ – Was fördert und was hindert das Lernen im Medizinstudium?
Creators: name: Thye, Miriam
name: Tauschel, Diethard
name: Weger, Ulrich
name: Scheffer, Christian
name: Edelhäuser, Friedrich
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Fragestellung/Einleitung: Universitäten und ihre Hochschuldidaktik haben es zur Aufgabe, sich fortwährend weiterzuentwickeln. Dieses geschieht in Orientierung an Fortschritten und Veränderungen in Technologie, Demographie, Gesellschaft und Wirtschaft [ref:3]. Zu erfahren,[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: Gemeinsame Jahrestagung der Gesellschaft für Medizinische Ausbildung (GMA) und des Arbeitskreises zur Weiterentwicklung der Lehre in der Zahnmedizin (AKWLZ)
Weak boson production measured in PbPb and pp collisions by CMS
Creators: name: Robles, Jorge A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The unprecedented center-of-mass energy available at the LHC offers unique opportunities for studying the properties of the strongly-interacting QCD matter created in PbPb collisions at extreme temperatures and very low parton momentum fractions. Electroweak boson production is an important benchmark process at hadron colliders. Precise measurements of Z production in heavy-ion collisions can help to constrain nuclear PDFs as well as serve as a standard candle of the initial state in PbPb collisions at the LHC energies. The inclusive and differential measurements of the Z boson yield in the muon decay channel will be presented, establishing that no modification is observed with respect to next-to-leading order pQCD calculations, scaled by the number of incoherent nucleon-nucleon collisions. The status of the Z measurement in the electron decay channel, as well as the first observation of W \rightarrow μν in heavy ion collisions will be given. The heavy-ion results will be presented in the context of those obtained in pp collisions with the CMS detector.
description: Quark Matter 2011 conference proceedings
title: Wie viel Lösungswissen haben StudienanfängerInnen für ihre Probleme und was setzen sie davon auch um?
Creators: name: Giese, Anne
name: Rieß, Tanja
name: Griewatz, Jan
name: Lammerding-Köppel, Maria
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Fragestellung/Einleitung: Der Übergang von der Schule/Ausbildung ins Studium ist für viele Studierende eine Herausforderung. Es gilt die StudienanfängerInnen hinreichend zu unterstützen, sich in ihrer neuen Rolle einzufinden und Problemen frühzeitig zu begegnen. Zum[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: Gemeinsame Jahrestagung der Gesellschaft für Medizinische Ausbildung (GMA) und des Arbeitskreises zur Weiterentwicklung der Lehre in der Zahnmedizin (AKWLZ)