cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: A Comparative Analysis of Factors Influencing Registered Nurse Retention and Turnover Below the Head Nurse Level in Acute Care Hospitals
Creators: name: Snyder, Jean M.
Publisher: name: Old Dominion University Libraries
Year: 1982

description: In a comparative survey, two groups of registered nurses (stayers and leavers) below the head nurse level were measured in the areas of human need satisfaction perception, role perception, and equity perception. The two registered nurse groups were further subdivided by educational preparation into diploma, associate, and baccalaureate degree stayers and leavers for comparative analysis. Literature reviews revealed considerable research in the area of retention and turnover, but few studies used a theoretical framework and a multivariate basis for observation. One hundred nine registered nurses from the ten area acute care hospitals were surveyed using an independently developed Nursing Perceptions Index (NPI). Validity and reliability studies were conducted to ensure objectivity in the instrument. Average and interactive ratings per dimension were computed and difference scores obtained for each group and subgroup using analysis of variance. Results indicated a significant difference between registered nurse stayers and leavers regarding human need satisfaction perception and equity perception. There was no significant difference between registered nurse stayers and leavers with regard to educational preparation or role perception.
title: Die Römer in Hessen. Hrsg. D. Baatz/F.-R. Herrmann. Stuttgart 1982
Creators: name: Klee, Margot
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Die Römer in Hessen. Hrsg. D. Baatz/F.-R. Herrmann. Konrad Theiss Verlag, Stuttgart 1982. 532 Seiten, 476 Abb.
Evolution of molecular phenotypes under stabilizing selection
Creators: name: Nourmohammad, Armita
name: Schiffels, Stephan
name: Laessig, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Molecular phenotypes are important links between genomic information and organismic functions, fitness, and evolution. Complex phenotypes, which are also called quantitative traits, often depend on multiple genomic loci. Their evolution builds on genome evolution in a complicated way, which involves selection, genetic drift, mutations and recombination. Here we develop a coarse-grained evolutionary statistics for phenotypes, which decouples from details of the underlying genotypes. We derive approximate evolution equations for the distribution of phenotype values within and across populations. This dynamics covers evolutionary processes at high and low recombination rates, that is, it applies to sexual and asexual populations. In a fitness landscape with a single optimal phenotype value, the phenotypic diversity within populations and the divergence between populations reach evolutionary equilibria, which describe stabilizing selection. We compute the equilibrium distributions of both quantities analytically and we show that the ratio of mean divergence and diversity depends on the strength of selection in a universal way: it is largely independent of the phenotype's genomic encoding and of the recombination rate. This establishes a new method for the inference of selection on molecular phenotypes beyond the genome level. We discuss the implications of our findings for the predictability of evolutionary processes.
Gravitational lensing around Kehagias-Sfetsos compact objects surrounded by plasma
Creators: name: Hensh, Sudipta
name: Abdujabbarov, Ahmadjon
name: Schee, Jan
name: Stuchlík, Zdeněk
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the optical properties of the Kehagias-Sfetsos (KS) compact objects, characterized by the "Hořava" parameter $ω_{_{KS}}$, in the presence of plasma, considering its homogeneous or power-law density distribution. The strong effects of both "Hořava" parameter $ω_{_{KS}}$ and plasma on the shadow cast by the KS compact objects are demonstrated. Using the weak field approximation, we investigate the gravitational lensing effect. Strong dependence of the deflection angle of the light on both the "Hořava" and plasma parameter is explicitly shown. The magnification of image source due to the weak gravitational lensing is given for both the homogeneous and inhomogeneous plasma.
description: 15 pages, 10 figures
Astrophysical false positives in direct imaging for exoplanets: a white dwarf close to a rejuvenated star
Creators: name: Zurlo, A.
name: Vigan, A.
name: Hagelberg, J.
name: Desidera, S.
name: Chauvin, G.
name: Almenara, J. M.
name: Biazzo, K.
name: Bonnefoy, M.
name: Carson, J. C.
name: Covino, E.
name: Delorme, P.
name: D'Orazi, V.
name: Gratton, R.
name: Mesa, D.
name: Messina, S.
name: Moutou, C.
name: Segransan, D.
name: Turatto, M.
name: Udry, S.
name: Wildi, F.
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: As is the case for all techniques involved in the research for exoplanets, direct imaging has to take into account the probability of so-called astrophysical false positives, which are phenomena that mimic the signature of objects we are seeking. In this work we aim to present a case of a false positive found during a direct imaging survey conducted with VLT/NACO. A promising exoplanet candidate was detected around the K2-type star HD\,8049 in July 2010.Its contrast of $ΔH$=7.05 at 1.57 arcsec allowed us to guess the presence of a 35 \MJup companion at 50 projected AU, for the nominal system age and heliocentric distance.To check whether it was gravitationally bound to the host star, as opposed to an unrelated background object, we re-observed the system one year later and concluded a high probability of a bound system. We also used radial velocity measurements of the host star, spanning a time range of $\sim$ 30 yr, to constrain the companion's mass and orbital properties, as well as to probe the host star's spectral age indicators and general spectral energy distribution. We also obtained for the companion $U$-band imaging with EFOSC and $NIR$ spectroscopy. Combining all these information we conclude that the companion of HD\,8049 is a white dwarf (WD), with temperature $T_{eff}=18800 \pm 2100$ K and mass $M_{WD}=0.56 \pm 0.08 M_{\odot}$. The significant radial velocity trend coupled with the imaging data indicate that the most probable orbit has a semimajor axis of about 50 AU.The discrepancy between the age indicators suggested against a bona-fide young star. The moderately large level of chromospheric activity and fast rotation, mimicking the properties of a young star, might be induced by the exchange of mass with the progenitor of the WD. This example demonstrates some of the challenges in determining accurate age estimates and identifications of faint companions.
description: 12 pages, 10 figures, 4 tables. Accepted for publication in Astronomy&Astrophysics
Generation of electric current and electromotive force by an antiferromagnetic domain wall
Creators: name: Mal'shukov, A. G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Dynamic magnetic textures may transfer the angular moment from the varying in time antiferromagnetic order to spins of conduction electrons. Due to the spin orbit coupling (SOC) these spin excitations can induce the electric current of conduction electrons. We calculated the electric current and the electromotive force (EMF) which are produced by a domain wall (DW) moving parallel to the magnetically compensated interface between an antiferromagnetic insulator (AFMI) and a two-dimensional spin orbit coupled metal. Spins of conduction electrons interact with localized spins of a collinear AFMI through the interface exchange interaction. The Keldysh formalism of nonequilibrium Green functions was applied for the analysis of this system. It is shown that a Bloch DW generates the current perpendicular to the DW motion direction. At the same time a Néel DW creates the electric potential which builds up across the wall. The total charge which is pumped by a Bloch DW can be expressed in terms of a topologically invariant charge quantum. The latter does not depend on variations of DW's velocity and shape. These effects increase dramatically when the Fermi energy approaches the van Hove singularity of the Fermi surface. The obtained results are important for the electrical detection and control of dynamic magnetic textures in antiferromagnets.
description: 11 pages, 2 figures
Comparison of Observed Galaxy Properties with Semianalytic Model Predictions using Machine Learning
Creators: name: Simet, Melanie
name: Chartab, Nima
name: Lu, Yu
name: Mobasher, Bahram
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: With current and upcoming experiments such as WFIRST, Euclid and LSST, we can observe up to billions of galaxies. While such surveys cannot obtain spectra for all observed galaxies, they produce galaxy magnitudes in color filters. This data set behaves like a high-dimensional nonlinear surface, an excellent target for machine learning. In this work, we use a lightcone of semianalytic galaxies tuned to match CANDELS observations from Lu et al. (2014) to train a set of neural networks on a set of galaxy physical properties. We add realistic photometric noise and use trained neural networks to predict stellar masses and average star formation rates on real CANDELS galaxies, comparing our predictions to SED fitting results. On semianalytic galaxies, we are nearly competitive with template-fitting methods, with biases of $0.01$ dex for stellar mass, $0.09$ dex for star formation rate, and $0.04$ dex for metallicity. For the observed CANDELS data, our results are consistent with template fits on the same data at $0.15$ dex bias in $M_{\rm star}$ and $0.61$ dex bias in star formation rate. Some of the bias is driven by SED-fitting limitations, rather than limitations on the training set, and some is intrinsic to the neural network method. Further errors are likely caused by differences in noise properties between the semianalytic catalogs and data. Our results show that galaxy physical properties can in principle be measured with neural networks at a competitive degree of accuracy and precision to template-fitting methods.
description: 19 pages, 10 figures, 6 tables. Accepted for publication in ApJ
A return to strong radio flaring by Circinus X-1 observed with the Karoo Array Telescope test array KAT-7
Creators: name: Armstrong, R. P.
name: Fender, R. P.
name: Nicolson, G. D.
name: Ratcliffe, S.
name: Linares, M.
name: Horrell, J.
name: Richter, L.
name: Schurch, M. P. E.
name: Coriat, M.
name: Woudt, P.
name: Jonas, J.
name: Booth, R.
name: Fanaroff, B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Circinus X-1 is a bright and highly variable X-ray binary which displays strong and rapid evolution in all wavebands. Radio flaring, associated with the production of a relativistic jet, occurs periodically on a ~17-day timescale. A longer-term envelope modulates the peak radio fluxes in flares, ranging from peaks in excess of a Jansky in the 1970s to an historic low of milliJanskys during the years 1994 to 2007. Here we report first observations of this source with the MeerKAT test array, KAT-7, part of the pathfinder development for the African dish component of the Square Kilometre Array (SKA), demonstrating successful scientific operation for variable and transient sources with the test array. The KAT-7 observations at 1.9 GHz during the period 13 December 2011 to 16 January 2012 reveal in temporal detail the return to the Jansky-level events observed in the 1970s. We compare these data to contemporaneous single-dish measurements at 4.8 and 8.5 GHz with the HartRAO 26-m telescope and X-ray monitoring from MAXI. We discuss whether the overall modulation and recent dramatic brightening is likely to be due to an increase in the power of the jet due to changes in accretion rate or changing Doppler boosting associated with a varying angle to the line of sight.
description: 7 pages, 5 figures, accepted for publication in MNRAS 14 May 2013
Exact Optimization: Part I
Creators: name: Lin, Li-Gang
name: Liang, Yew-Wen
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary: 15A18, 52A41, 90C20, 90C25, and 90C46

description: Nonlinear programming is explicitly analyzed via a novel perspective/method and from a bottom-up manner. The philosophy is based on the recent findings on convex quadratic equation (CQE), which help clarify a geometric interpretation that relates CQE to convex quadratic function (CQF). More specifically, regarding the solvability of CQE, its necessary and sufficient condition as well as a unified parameterization of all the solutions has recently been analytically formulated. Moving forward, the understanding of CQE is utilized to describe the geometric structure of CQF, and the CQE-CQF relation. All these results are shown closely related to a basis in the optimization literature, namely quadratic programming (QP). For the first time from this viewpoint, the QPs subject to equality, inequality, equality-and-inequality, and extended constraints can be algebraically solved in derivative-free closed formulae, respectively. All the results are derived without knowing a feasible point, a priori and any time during the process.
description: This manuscript is only preliminary and still growing. Therefore, with expectations, we deeply appreciate all kinds of input. It is worth noting that, with gratitude for all the editorial effort, we complied with the comment/instruction to divide this manuscript into different journals and have been working on the sequels
title: Measuring Interpersonal Dependency in Adolescent Psychiatric Inpatients
Creators: name: Schaffer, Susan D.
Publisher: name: Old Dominion University Libraries
Year: 1982

description: The successful inpatient treatment of emotionally troubled adolescents must facilitate their achievement of developmentally appropriate independence while minimizing the maladaptive dependency that can be fostered by the hospitalization experience. Levels of interpersonal dependency were measured in seven adolescent psychiatric inpatients over a ninety day period. The Interpersonal Dependency Inventory by Hirschfeld, Klerman, Gough, Barrett, Korchin, & Chodoff was utilized. The individual therapist of each participant independently assessed the participant's response to hospitalization at forty-five and ninety days using a five point Leikert type scale. The study demonstrated no significant changes in dependency levels at forty-five and ninety days. The therapist's assessment proved to have no relationship to levels of dependency as measured by The Interpersonal Dependency Inventory.
title: Michael Strobel, Die Schussenrieder Siedlung Taubried I (Bad Buchau, Kr. Biberach)
Creators: name: Lichardus, Jan
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Michael Strobel, Die Schussenrieder Siedlung Taubried I (Bad Buchau, Kr. Biberach). Ein Beitrag zu den Siedlungsstrukturen und zur Chronologie des frühen und mittleren Jungneolithikums in Oberschwaben, hrsg. vom Landesdenkmalamt Baden-Württemberg Archäologische Denkmalpflege, Stuttgart. Konrad Theiss Verlag, Stuttgart 2000. 596 Seiten, 384 Abbildungen, 119 Tafeln, 1 Beilage.
Potentilla multifida
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P. multifida X verna Cat. 94. Zu streichen.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
title: Pregravid Weight, Prenatal Weight Gain and Maternal Age as Risk Factors in Pregnancy-Induced Hypertension Development
Creators: name: Remich, Maryellen C.
Publisher: name: Old Dominion University Libraries
Year: 1986

description: This study examined whether the factors of pregravid weight, total prenatal weight gain at twenty-eight weeks and maternal age correlated with the development of pregnancy-induced hypertension in the third trimester. An ex post facto chart review of low risk primigravidas attending a public health maternity clinic was performed. A multiple regression correlation procedure demonstrated no significant correlation between the variables. Significant results of Chi-sguare tests of independence were demonstrated between low maternal age and pregnancy-induced hypertension development and between the failure of the mean arterial pressure to decrease in the second trimester and the development of pregnancy-induced hypertension in the last trimester. The researcher recommended that this study be replicated with a larger more heterogeneous sample in a prospective study to increase the ability to generalize the results to the target population.
title: Friedrich Laux, Die Äxte und Beile in Niedersachsen I (Flach-, Randleisten- und Absatzbeile)
Creators: name: Hansen, Svend
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Friedrich Laux, Die Äxte und Beile in Niedersachsen I (Flach-, Randleisten- und Absatzbeile). Prähistorische Bronzefunde Band IX,23. Franz Steiner Verlag, Stuttgart 2000. 239 Seiten, 101 Tafeln.
title: Vasile Lica, The coming of Rome in the Dacian world
Creators: name: Schuol, Monika
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Vasile Lica, The coming of Rome in the Dacian world. Xenia, Heft 44. Universitätsverlag Konstanz, Konstanz 2000. 299 Seiten.
Some aspects of quantum mechanics and field theory in a Lorentz invariant noncommutative space
Creators: name: Abreu, Everton M. C.
name: Neves, Mario J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We obtained the Feynman propagators for a noncommutative (NC) quantum mechanics defined in the recently developed Doplicher-Fredenhagen-Roberts-Amorim (DFRA) NC background that can be considered as an alternative framework for the NC spacetime of the early Universe. The operators formalism was revisited and we applied its properties to obtain a NC transition amplitude representation. Two examples of DFRA's systems were discussed, namely, the NC free particle and NC harmonic oscillator. The spectral representation of the propagator gave us the NC wave function and energy spectrum. We calculated the partition function of the NC harmonic oscillator and the distribution function. Besides, the extension to NC DFRA quantum field theory is straightforward and we used it in a massive scalar field. We had written the scalar action with self-interaction $ϕ^{4}$ using the Weyl-Moyal product to obtain the propagator and vertex of this model needed to perturbation theory. %and the effective action to give rise one-particle-irreducible diagrams. It is important to emphasize from the outset is that the formalism demonstrated here will not be constructed introducing a NC parameter in the system, as usual. It will be generated naturally from an already NC space. In this extra dimensional NC space, we presented also the idea of dimensional reduction to recover commutativity.
description: 22 pages. Continuation of 1206.4065 with substantial text overlap. arXiv admin note: substantial text overlap with arXiv:1206.4065
The supramolecular structure of the respiratory chain of higher plants
Creators: name: Eubel, Holger
Publisher: name: Hannover : Universität
Year: 2004
Subjects: subject: Plant respiratory chain
subject: supercomplexes
subject: plant specific subunits
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Modular compactifications of $\mathcal M_{2,n}$ with Gorenstein singularities
Creators: name: Battistella, Luca
Publisher: name: arXiv
Year: 2019
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H10, 14H20

description: We study the geometry of Gorenstein curve singularities of genus two, and of their stable limits. These singularities come in two families, corresponding to either Weierstrass or conjugate points on a semistable tail. For every $1\leq m
description: 38 pages, 8 figures, comments are welcome! v2: exposition improved largely due to the referee's comments: - simpler proof of the classification of isolated Gorenstein singularities of genus two using differentials, - description of semistable tails in the language of tropical geometry, - material on crimping spaces moved to an appendix. Revised version to appear in Algebra & Number Theory
Stochastische Modelle mit zeitlich gekoppelten Ereignissen : Rekonstruktion der Zuordnung und Schätzen der Verzögerungsverteilung
Creators: name: Wegener, Hendrik
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Maximum a posteriori method
subject: moment type estimators
subject: M/G queue
subject: Maximum a posteriori Methode
subject: Momentenschätzer
subject: M/G-Warteschlangensystem
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: [no abstract]
Nondispersive decay for the cubic wave equation
Creators: name: Donninger, Roland
name: Zenginoğlu, Anıl
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35L05, 35L71, 35Q75, 58J45, 83C30

description: We consider the hyperboloidal initial value problem for the cubic focusing wave equation. Without symmetry assumptions, we prove the existence of a co-dimension 4 Lipschitz manifold of initial data that lead to global solutions in forward time which do not scatter to free waves.
description: 37 pages, 3 figures
Fast Silicon Carbide MOSFET based high-voltage push-pull switch for charge state separation of highly charged ions with a Bradbury-Nielsen Gate
Creators: name: Schweiger, Christoph
name: Door, Menno
name: Filianin, Pavel
name: Herkenhoff, Jost
name: Kromer, Kathrin
name: Lange, Daniel
name: Marschall, Domenik
name: Rischka, Alexander
name: Wagner, Thomas
name: Eliseev, Sergey
name: Blaum, Klaus
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In this paper we report on the development of a fast high-voltage switch, which is based on two enhancement mode N-channel Silicon Carbide Metal Oxide Semiconductor Field-Effect Transistors in push-pull configuration. The switch is capable of switching high voltages up to 600 V on capacitive loads with rise and fall times on the order of 10 ns and pulse widths $\leq$ 20 ns. Using this switch it was demonstrated that from the charge state distribution of bunches of highly charged ions ejected from an electron beam ion trap with a specific kinetic energy, single charge states can be separated by fast switching of the high voltage applied to a Bradbury-Nielsen Gate with a resolving power of about 100.
Interpolated Adversarial Training: Achieving Robust Neural Networks without Sacrificing Too Much Accuracy
Creators: name: Lamb, Alex
name: Verma, Vikas
name: Kawaguchi, Kenji
name: Matyasko, Alexander
name: Khosla, Savya
name: Kannala, Juho
name: Bengio, Yoshua
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Adversarial robustness has become a central goal in deep learning, both in the theory and the practice. However, successful methods to improve the adversarial robustness (such as adversarial training) greatly hurt generalization performance on the unperturbed data. This could have a major impact on how the adversarial robustness affects real world systems (i.e. many may opt to forego robustness if it can improve accuracy on the unperturbed data). We propose Interpolated Adversarial Training, which employs recently proposed interpolation based training methods in the framework of adversarial training. On CIFAR-10, adversarial training increases the standard test error (when there is no adversary) from 4.43% to 12.32%, whereas with our Interpolated adversarial training we retain the adversarial robustness while achieving a standard test error of only 6.45%. With our technique, the relative increase in the standard error for the robust model is reduced from 178.1% to just 45.5%. Moreover, we provide mathematical analysis of Interpolated Adversarial Training to confirm its efficiencies and demonstrate its advantages in terms of robustness and generalization.
description: This is the latest version, which is published in the Journal, "Neural Networks", in 2022. All the previous results are unchanged. First two authors contributed equally
title: Markus Peter, Untersuchungen zu den Fundmünzen aus Augst und Kaiseraugst
Creators: name: Haupt, Peter
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Markus Peter, Untersuchungen zu den Fundmünzen aus Augst und Kaiseraugst. Studien zu Fundmünzen der Antike, Band 17. Verlag Gebr. Mann, Berlin 2001. 328 Seiten, 84 Diagramme, 58 Tabellen und 2 Karten.
Chromatic (co)homology of finite general linear groups
Creators: name: Hutchinson, Samuel
name: Marsh, Samuel
name: Strickland, Neil
Publisher: name: arXiv
Year: 2019
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55N20

description: We study the Morava $E$-theory (at a prime $p$) of $BGL_d(F)$, where $F$ is a finite field with $|F|=1\pmod{p}$. Taking all $d$ together, we obtain a structure with two products $\times$ and $\bullet$. We prove that it is a polynomial ring under $\times$, and that the module of $\times$-indecomposables inherits a $\bullet$-product, and we describe the structure of the resulting ring. In the process, we prove many auxiliary structural results.
description: Revised in response to referee's comments: added outline, additional context and references, and index of notation; various other minor changes
Initial Conditions with Flow from a McLerran Venugopalan model with Transverse Dynamics
Creators: name: Chen, Guangyao
name: Fries, Rainer J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Using a recursive solution of the Yang-Mills equation, we calculate analytic expressions for the gluon fields created in ultra-relativistic heavy ion collisions at small times $τ$. We have worked out explicit solutions for the fields and the energy momentum tensor up to 4th order in an expansion in $τ$. We generalize the McLerran-Venugopalan model to allow for a systematic treatment of averaged charge densities $μ^2$ that vary as a function of transverse coordinates. This allows us to calculate radial, elliptic and directed flow of gluon fields. Our results can serve as initial conditions for hydrodynamic simulations of nuclear collisions that include initial flow.
description: 4 pages, 3 figures, Prepared for the Hot Quarks 2012 workshop
Frustrated quantum Heisenberg antiferromagnets at high magnetic fields: Beyond the flat-band scenario
Creators: name: Derzhko, Oleg
name: Richter, Johannes
name: Krupnitska, Olesia
name: Krokhmalskii, Taras
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider the spin-1/2 antiferromagnetic Heisenberg model on three frustrated lattices (the diamond chain, the dimer-plaquette chain and the two-dimensional square-kagome lattice) with almost dispersionless lowest magnon band. Eliminating high-energy degrees of freedom at high magnetic fields, we construct low-energy effective Hamiltonians which are much simpler than the initial ones. These effective Hamiltonians allow a more extended analytical and numerical analysis. In addition to the standard strong-coupling perturbation theory we also use a localized-magnon based approach leading to a substantial improvement of the strong-coupling approximation. We perform extensive exact diagonalization calculations to check the quality of different effective Hamiltonians by comparison with the initial models. Based on the effective-model description we examine the low-temperature properties of the considered frustrated quantum Heisenberg antiferromagnets in the high-field regime. We also apply our approach to explore thermodynamic properties for a generalized diamond spin chain model suitable to describe azurite at high magnetic fields. Interesting features of these highly frustrated spin models consist in a steep increase of the entropy at very small temperatures and a characteristic extra low-temperature peak in the specific heat. The most prominent effect is the existence of a magnetic-field driven Berezinskii-Kosterlitz-Thouless phase transition occurring in the two-dimensional model.
description: 16 pages, 12 figures
title: Jennifer Price (Hrsg.), Glass in Britain and Ireland. AD 350 – 1100
Creators: name: Siepen, Margareta
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Glass in Britain and Ireland. AD 350 – 1100. Edited by Jennifer Price. Mit Beiträgen von Justine Bailey, Mavis Bimson, Ewan Campbell, Rosemary Cramp, Vera Evison, Ian C . Freestone, Margaret Guido (†), Julian Henderson, S. M . Hirst, Jennifer Price und Martin Welch. British Museum. Occasional Paper Number 127. The Trustess Of The British Museum, London 2000. 209 Seiten, zahlreiche Abbildungen.
Examples of groups whose automorphisms have exotic growth
Creators: name: Coulon, Rémi
Publisher: name: arXiv
Year: 2019
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20E36, 20F28, 20F65, 20F67, 20F06

description: In this note we produce examples of outer automorphisms of finitely generated groups which have exotic behaviors in terms of growth of conjugacy classes.
description: 13 pages, 1 figure
title: Interpretation of the 2017 groundwater age tracer and isotope results for the Christchurch aquifer system
Creators: name: Stewart, Mike K.
name: van der Raaij, Rob W.
Publisher: name: GNS Science
Year: 2019

description: This report interprets the results from groundwater age tracer and isotope measurements in the Christchurch aquifer system in 2017. The study included carbon-14, tritium and trace gases measured at GNS, stable isotopes (oxygen-18 and deuterium), and water chemistry measured at the same time (results given in Appendices 1 and 2). The interpreted mean ages and water sources are compared with results from measurements from each decade between 1976 and 2006 to see how the system is responding to exploitation. The goal is to improve understanding of the hydrogeological processes in the Christchurch aquifer system and allow for better management of the resource. It is hoped that the work will lead to improved conceptual models and support better digital modelling of the system. The 2017 survey showed that the 14C ages of deep water in the Christchurch aquifer system are continuing to become older as groundwater abstraction continues (in particular, the 2017 ages are older than the 2006 ages). In addition, the steep west-east gradient in ages continues to be observed (e.g. from 400 years to 1450 years in the central transect). The system is clearly accessing deep storage, which is much older on the eastern than on the western side. However, in addition to the increasing ages of deep water, there are indications of inflow of increasingly younger water on the western and northern sides of Christchurch. This has implications for long-term risks to the quality of the system, such as risk of microbial contamination, because such contamination would be carried by very young water penetrating from the surface. Shallow layers are more vulnerable than deeper levels, so drinking water should be drawn from deeper levels. Monitoring ages and groundwater sources with tritium and gas age tracers and chemical measurements is recommended. Risk of saline intrusion on the coastal side of the system to deeper aquifers is considered small because artesian pressures recover each winter after summer drawdown, despite continued groundwater abstraction. However, shallow levels of the system are more vulnerable due to possible drawdown by abstraction and sea-level rise due to climate change. Breakthrough of conservative contaminants (such as nitrate) brought in by young water inflow to the deep system may be a possibility in time and will be worth monitoring with nitrate and 14C measurements. The two deep wells near the Waimakariri River gave very young ages, but the inferences to be drawn from this are unclear at present. It is recommended that more emphasis should be given to 14C measurements in the future to monitor the functioning of the deep system. This is because 14C can give the real mean ages of the water, and therefore provide fundamental information on the deep system flow paths and storages. (auth)
Twisted loop transgression and higher Jandl gerbes over finite groupoids
Creators: name: Noohi, Behrang
name: Young, Matthew B.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Algebra (math.QA)
subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: Primary: 57R56, Secondary 19L50, 20C30

description: Given a double cover $π: \mathcal{G} \rightarrow \hat{\mathcal{G}}$ of finite groupoids, we explicitly construct twisted loop transgression maps, $τ_π$ and $τ_π^{ref}$, thereby associating to a Jandl $n$-gerbe $\hatλ$ on $\hat{\mathcal{G}}$ a Jandl $(n-1)$-gerbe $τ_π(\hatλ)$ on the quotient loop groupoid of $\mathcal{G}$ and an ordinary $(n-1)$-gerbe $τ^{ref}_π(\hatλ)$ on the unoriented quotient loop groupoid of $\mathcal{G}$. For $n =1,2$, we interpret the character theory (resp. centre) of the category of Real $\hatλ$-twisted $n$-vector bundles over $\hat{\mathcal{G}}$ in terms of flat sections of the $(n-1)$-vector bundle associated to $τ_π^{ref}(\hatλ)$ (resp. the Real $(n-1)$-vector bundle associated to $τ_π(\hatλ)$). We relate our results to Real versions of twisted Drinfeld doubles and pointed fusion categories and to discrete torsion in orientifold string and M-theory.
description: 33 pages
title: Helga Bumke, Statuarische Gruppen in der frühen griechischen Kunst
Creators: name: Haug, Annette
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Helga Bumke, Statuarische Gruppen in der frühen griechischen Kunst. Jahrbuch des Deutschen Archäologischen Instituts, Ergänzungsheft 32. De Gruyter, Berlin und New York 2004. 204 Seiten, 36 Tafeln.
title: Jürgen W. Riethmüller, Asklepios. Heiligtümer und Kulte
Creators: name: Kranz, Peter
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Jürgen W. Riethmüller, Asklepios. Heiligtümer und Kulte, Bände I und II. Studien zu antiken Heilig tümern 2. Verlag Archäologie und Geschichte, Heidelberg 2005. 392 und 502 Seiten, 5 Karten, 142 Abbildungen, 22 Tafeln.
title: Yann Le Bohec, L’armée romaine sous le Bas-Empire
Creators: name: Brulet, Raymond
Publisher: name: University Library Heidelberg
Year: 2016

description: Yann Le Bohec, L’armée romaine sous le Bas-Empire. Collection Antiquité-Synthèses volume 11. Picard, Paris 2006. 256 pages, 45 planches.
Representations and the foundations of mathematics
Creators: name: Sanders, Sam
Publisher: name: arXiv
Year: 2019
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03B30, 03D65, 03F35

description: The representation of mathematical objects in terms of (more) basic ones is part and parcel of (the foundations of) mathematics. In the usual foundations of mathematics, i.e. $\textsf{ZFC}$ set theory, all mathematical objects are represented by sets, while ordinary, i.e. non-set theoretic, mathematics is represented in the more parsimonious language of second-order arithmetic. This paper deals with the latter representation for the rather basic case of continuous functions on the reals and Baire space. We show that the logical strength of basic theorems named after Tietze, Heine, and Weierstrass, changes significantly upon the replacement of 'second-order representations' to 'third-order functions'. We discuss the implications and connections to the Reverse Mathematics program and its foundational claims regarding predicativist mathematics and Hilbert's program for the foundations of mathematics. Finally, we identify the problem caused by representations of continuous functions and formulate a criterion to avoid problematic codings within the bigger picture of representations.
description: 24 pages, one figure. To appear in Notre Dame Journal for Formal Logic. Uses the same or similar 'preliminaries' or 'appendix' section as arXiv:1910.02489, arXiv:1908.05677, arXiv:1908.05676, arXiv:1905.04058
title: José María Blázquez Martínez, El Mediterráneo y España en la Antigüedad
Creators: name: Sánchez-Moreno, Eduardo
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: José María Blázquez Martínez, El Mediterráneo y España en la Antigüedad. Historia, religión y arte. Ediciones Cátedra, Madrid 2003. 847 páginas, 30 figuras.
Simplicial volume of one-relator groups and stable commutator length
Creators: name: Heuer, Nicolaus
name: Loeh, Clara
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65, 57M07, 20J05

description: A one-relator group is a group $G_r$ that admits a presentation $\langle S \mid r \rangle$ with a single relation $r$. One-relator groups form a rich classically studied class of groups in Geometric Group Theory. If $r \in F(S)'$, the commutator subgroup of $F(S)$, we introduce the simplicial volume of $\| G_r \|$. We relate this invariant to the stable commutator length $\textrm{scl}_S(r)$ of the element $r \in F(S)$. We show that often (though not always) the linear relationship $\| G_r \| = 4 \cdot \textrm{scl}_S(r) - 2$ holds and that every rational number modulo $1$ is the simplicial volume of a one-relator group. Moreover, we show that this relationship holds approximately for proper powers and for elements satisfying the small cancellation condition $C'(1/N)$, with a multiplicative error of $O(1/N)$. This allows us to prove for random elements of $F(S)'$ of length $n$ that $\| G_r \|$ is $2 \log(2 |S| - 1)/3 \cdot n / \log(n) + o(n/\log(n))$ with high probability, using an analogous result of Calegari-Walker for stable commutator length.
description: 41 pages - comments welcome! v2: Significant changes to v1. The changes include: -A counterexample to the main question of v1. -A theorem about the random simplicial volume of a one-relator group. -A significant restructuring of section 6 (Computational bounds: lallop); v3: to appear in AGT
title: Georgios I. Despinis, Hochrelieffriese des 2. Jahrhunderts n. Chr. aus Athen
Creators: name: Boschung, Dietrich
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Georgios I. Despinis, Hochrelieffriese des 2. Jahrhunderts
n. Chr. aus Athen. Mit einem Vorwort von Klaus Fittschen. Hrsg. Deutsches Archäologisches Institut, Athenische Abteilung. Hirmer Verlag, München 2003. 336 Seiten, 91 Tafeln.
Degree and clustering coefficient in sparse random intersection graphs
Creators: name: Bloznelis, Mindaugas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We establish asymptotic vertex degree distribution and examine its relation to the clustering coefficient in two popular random intersection graph models of Godehardt and Jaworski [Electron. Notes Discrete Math. 10 (2001) 129-132]. For sparse graphs with a positive clustering coefficient, we examine statistical dependence between the (local) clustering coefficient and the degree. Our results are mathematically rigorous. They are consistent with the empirical observation of Foudalis et al. [In Algorithms and Models for Web Graph (2011) Springer] that, "clustering correlates negatively with degree." Moreover, they explain empirical results on $k^{-1}$ scaling of the local clustering coefficient of a vertex of degree k reported in Ravasz and Barabasi [Phys. Rev. E 67 (2003) 026112].
description: Published in at http://dx.doi.org/10.1214/12-AAP874 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Thom spectra, higher $THH$ and tensors in $\infty$-categories
Creators: name: Rasekh, Nima
name: Stonek, Bruno
name: Valenzuela, Gabriel
Publisher: name: arXiv
Year: 2019
Subjects: subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 55P43 (Primary), 55N20, 18D20 (Secondary)

description: Let $f:G\to \mathrm{Pic}(R)$ be a map of $E_\infty$-groups, where $\mathrm{Pic}(R)$ denotes the Picard space of an $E_\infty$-ring spectrum $R$. We determine the tensor $X\otimes_R Mf$ of the Thom $E_\infty$-$R$-algebra $Mf$ with a space $X$; when $X$ is the circle, the tensor with $X$ is topological Hochschild homology over $R$. We use the theory of localizations of $\infty$-categories as a technical tool: we contribute to this theory an $\infty$-categorical analogue of Day's reflection theorem about closed symmetric monoidal structures on localizations, and we prove that for a smashing localization $L$ of the $\infty$-category of presentable $\infty$-categories, the free $L$-local presentable $\infty$-category on a small simplicial set $K$ is given by presheaves on $K$ valued on the $L$-localization of the $\infty$-category of spaces. If $X$ is a pointed space, a map $g: A\to B$ of $E_\infty$-ring spectra satisfies $X$-base change if $X\otimes B$ is the pushout of $A\to X\otimes A$ along $g$. Building on a result of Mathew, we prove that if $g$ is étale then it satisfies $X$-base change provided $X$ is connected. We also prove that $g$ satisfies $X$-base change provided the multiplication map of $B$ is an equivalence. Finally, we prove that, under some hypotheses, the Thom isomorphism of Mahowald cannot be an instance of $S^0$-base change.
description: 43 pages. Final version, to appear in Algebraic & Geometric Topology
Solving ARC visual analogies with neural embeddings and vector arithmetic: A generalized method
Creators: name: Thoms, Luca H.
name: Veldkamp, Karel A.
name: Rosenbusch, Hannes
name: Stevenson, Claire E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Analogical reasoning derives information from known relations and generalizes this information to similar yet unfamiliar situations. One of the first generalized ways in which deep learning models were able to solve verbal analogies was through vector arithmetic of word embeddings, essentially relating words that were mapped to a vector space (e.g., king - man + woman = __?). In comparison, most attempts to solve visual analogies are still predominantly task-specific and less generalizable. This project focuses on visual analogical reasoning and applies the initial generalized mechanism used to solve verbal analogies to the visual realm. Taking the Abstraction and Reasoning Corpus (ARC) as an example to investigate visual analogy solving, we use a variational autoencoder (VAE) to transform ARC items into low-dimensional latent vectors, analogous to the word embeddings used in the verbal approaches. Through simple vector arithmetic, underlying rules of ARC items are discovered and used to solve them. Results indicate that the approach works well on simple items with fewer dimensions (i.e., few colors used, uniform shapes), similar input-to-output examples, and high reconstruction accuracy on the VAE. Predictions on more complex items showed stronger deviations from expected outputs, although, predictions still often approximated parts of the item's rule set. Error patterns indicated that the model works as intended. On the official ARC paradigm, the model achieved a score of 2% (cf. current world record is 21%) and on ConceptARC it scored 8.8%. Although the methodology proposed involves basic dimensionality reduction techniques and standard vector arithmetic, this approach demonstrates promising outcomes on ARC and can easily be generalized to other abstract visual reasoning tasks.
description: Data and code can be found on https://github.com/foger3/ARC_DeepLearning
title: An Exploratory Study of Terminal Syndrome
Creators: name: Adams, Phyllis Jean
Publisher: name: Old Dominion University Libraries
Year: 1993

description: The purpose of this study was to establish the identity of a syndrome related to nursing care of the terminally ill patient, regardless of a malignant or non-malignant disease origin. The sample consisted of completed medical records of 15 chronic obstructive pulmonary disease patients and 15 cancer patients. The commonalities between the two groups are: (1) Defining Characteristics--dyspnea, anxiety, abnormal breath sounds, dry skin, pale skin, pain, anorexia, presence of pressure sores, incontinence, and generalized edema; (2) Nursing Diagnoses--high risk for altered respiratory function, anxiety (individual and family), skin integrity (impaired and high risk for impaired), altered comfort: pain, high risk for infection: related to intravenous therapy, high risk for injury: trauma (falls), and altered nutrition: less than body requirements; (3) Nursing Interventions--from the above nursing diagnoses associated interventions were studied. Agreement between the two groups in chosen interventions ranged from 27% to 48%. A clustering of data has been documented to support the establishment of Terminal Syndrome.
title: Predictors of Appointment-Keeping Behaviors Among Users of Adult Medical Clinic
Creators: name: Campau, Ruth L.
Publisher: name: Old Dominion University Libraries
Year: 1984

description: In a descriptive correlational study, three predictors of appointment keeping behaviors of adults who attend general medical clinics in a primary health care setting were explored. The three selected predictors from the Health Belief Model, a preventive health behavior model, were: (a) perceived barriers to health care, (b) health locus of control (HLC), and (c) satisfaction with health care. The purpose of this study was to identify the predictive value of multiple variables for a specific health-related behavior. Data on the study were collected on a non-probability, purposive sample of 52 users of the adult general medical clinics. The tool was a combined selfadministered questionnaire designed to measure appointment-keeping behaviors, number and type of barriers, HLC dimensions, and level of client satisfaction with health care. Pilot studies for validity and reliability were conducted in order to assess the quality and adequacy of the instrument. One hypothesis was tested for significant relationship between the three predictors and the criterion variable using multiple regression models. Results indicated a significant relationship between all three predictors and the appointment-keeping behaviors. Barriers, as the single predictor, was the largest contributor to the variance of the criterion variable. Trends were also identified in certain demographic variables which may have had an influence on the outcome of the study.