cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Proceedings Fifth Interaction and Concurrency Experience
Creators: name: Carbone, Marco
name: Lanese, Ivan
name: Silva, Alexandra
name: Sokolova, Ana
Publisher: name: arXiv
Year: 2012
Subjects: subject: Programming Languages (cs.PL)
subject: Logic in Computer Science (cs.LO)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: This volume contains the proceedings of ICE'12, the 5th Interaction and Concurrency Experience workshop, which was held in Stockholm, Sweden on the 16th of June 2012 as a satellite event of DisCoTec'12. The topic of ICE'12 was Distributed Coordination, Execution Models, and Resilient Interaction. The ICE procedure for paper selection allows for PC members to interact, anonymously, with authors. During the review phase, each submitted paper is published on a Wiki and associated with a discussion forum whose access is restricted to the authors and to all the PC members not declaring a conflict of interests. The PC members post comments and questions that the authors reply to. Each paper was reviewed by four PC members, and altogether 8 papers were accepted for publication. We were proud to host two invited talks, Marcello Bonsangue and Ichiro Hasuo, whose abstracts are included in this volume together with the regular papers.
description: EPTCS 104, 2012
Förderkonzepte für sogenannte lernbehinderte Schülerinnen und Schüler im Rahmen komplementärer Schul- und Unterrichtsinnovationen
Creators: name: Wernecke, Klaus-Dieter
Publisher: name: Hannover : Universität Hannover
Year: 2000
Subjects: subject: Full half-day school
subject: methods of qualitative social research
subject: assistance/development plans
subject: Förderunterricht
subject: Lernbehindertenschule
subject: Schuljahr 3-4
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen

description: [no abstract]
Arbitrary non-paraxial accelerating periodic beams and spherical shaping of light
Creators: name: Mathis, A.
name: Courvoisier, F.
name: Giust, R.
name: Furfaro, L.
name: Jacquot, M.
name: Froehly, L.
name: Dudley, J. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report the observation of arbitrary accelerating beams designed using a non-paraxial description of optical caustics. We use a spatial light modulator-based setup and techniques of Fourier optics to generate circular and Weber beams subtending over 95 degrees of arc. Applying a complementary binary mask also allows the generation of periodic accelerating beams taking the forms of snake-like trajectories, and the application of a rotation to the caustic allows the first experimental synthesis of optical accelerating beams upon the surface of a sphere in three dimensions.
description: 4 pages, 4 figures article
Auenregeneration an der Elbe : Untersuchungen zur Syndynamik und Bioindikation von Pflanzengesellschaften an der unteren Mittelelbe bei Lenzen
Creators: name: Hellwig, Michael
Publisher: name: Hannover : Universität Hannover
Year: 2000
Subjects: subject: Floodplain forest
subject: riverside wood
subject: levee
subject: restoration
subject: Elbe
subject: research project
subject: Aue
subject: Lenzen (Elbe)
subject: Pflanzengesellschaft
subject: Pflanzenökologie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: [no abstract]
Character and dimension formulae for queer Lie superalgebra
Creators: name: Su, Yucai
name: Zhang, R. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Representation Theory (math.RT)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 17B10

description: Closed formulae are constructed for the characters and dimensions of the finite dimensional simple modules of the queer Lie superalgebra q(n). This is achieved by refining Brundan's algorithm for computing simple q(n)-characters.
description: LaTeX, 16 pages
Role of the sampling weight in evaluating classical time autocorrelation functions
Creators: name: Zimmermann, Tomas
name: Vanicek, Jiri
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We analyze how the choice of the sampling weight affects the efficiency of the Monte Carlo evaluation of classical time autocorrelation functions. Assuming uncorrelated sampling or sampling with constant correlation length, we propose a sampling weight for which the number of trajectories needed for convergence is independent of the correlated quantity, dimensionality, dynamics, and phase-space density. In contrast, it is shown that the computational cost of the "standard" intuitive algorithm which samples directly from the phase-space density may scale exponentially with the number of degrees of freedom. Yet, for the stationary Gaussian distribution of harmonic systems and for the autocorrelation function of a linear function of phase-space coordinates, the computational cost of this standard algorithm is also independent of dimensionality.
description: 5 pages, 3 figures, submitted to Phys. Rev. Lett
Ion pseudoheating by low-frequency Alfvén waves revisited
Creators: name: Dong, Chuanfei
name: Singh, Nagendra
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Pseudoheating of ions in the presence of Alfvén waves is studied. We show that this process can be explained by $E\times B$ drift. The analytic solution obtained in this paper are quantitatively in accordance with previous results. Our simulation results show that the Maxwellian distribution is broadened during the pseudoheating; however, the shape of the broadening distribution function depends on the number of wave modes (i.e., a wave spectrum or a monochromatic dispersionless wave) and the initial thermal speed of ions ($v_{p}$). It is of particular interests to find that the Maxwellian shape is more likely to maintain during the pseudoheating under a wave spectrum compared with a monochromatic wave. It significantly improves our understanding of heating processes in interplanetary space where Alfvénic turbulences exist pervasively. Compared with a monochromatic Alfvén wave, $E\times B$ drift produces more energetic particles in a broad spectrum of Alfvén waves, especially when the Alfvénic turbulence with phase coherent wave modes is given. Such particles may escape from the region of interaction with the Alfvén waves and can contribute to fast particle population in astrophysical and space plasmas.
description: Physics of Plasmas, in press; Physics of Plasmas, 2013
Untersuchung von Möglichkeiten und Grenzen optischer Meßtechniken zur Temperaturbestimmung in Verbrennungsmotoren
Creators: name: Block, Bernd
Publisher: name: Hannover : Universität Hannover
Year: 1997
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: [no abstract]
Spontaneous knotting and unknotting of flexible linear polymers: equilibrium and kinetic aspects
Creators: name: Tubiana, Luca
name: Rosa, Angelo
name: Fragiacomo, Filippo
name: Micheletti, Cristian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We report on a computational study of the statics and dynamics of long flexible linear polymers that spontaneously knot and unknot. Specifically, the equilibrium self-entanglement properties, such as the knotting probability, knot length and position, are investigated with extensive Monte Carlo sampling of chains of up to 15,000 beads. Tens of such equilibrated chains of up to 4, 096 beads are next used as starting points for Langevin dynamics simulations. The complex interplay of chain dynamics and self-knotting is addressed by monitoring the time evolution of various metric and entanglement properties. In particular, the extensive duration of the simulations allows for observing the spontaneous formation and disappearance of prime and composite physical knots in linear chains. Notably, a sizeable fraction of self-knotting and unknotting events is found to involve regions that are far away from the chain termini. To the best of our knowledge this represents the first instance where spontaneous changes in knotting for linear homopolymers are systematically characterized using unbiased dynamics simulations.
description: 14 pages,10 Figures. Notice: This document is the unedited Author's version of a Submitted Work that was subsequently accepted for publication in Macromolecules, copyright \copyright American Chemical Society after peer review. To access the final edited and published work see DOI
Charakterisierung des Temperatureinflusses auf verschiedene rekombinante Säugerzellinien zur Optimierung des Produktionsprozesses von Glykoproteinen in Rührkesselreaktoren
Creators: name: Buch, Torsten
Publisher: name: Hannover : Universität Hannover
Year: 1997
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Redefining the Attraction Measure, Scaling Exponent and Impedance Function of the Gravity Model
Creators: name: Chen, Yanguang
name: Xu, Feng
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The attraction measure, scaling exponent, and impedance function of the gravity model are redefined using the concepts from fractals and spatial complexity. Firstly, the attraction measure of spatial interaction in human systems is defined by the product of traffic inflow and outflow. Based on the new definition, the gravity model originating from the Newtonian analogy is differentiated from Wilson's spatial interaction model deriving from entropy-maximizing principle. Secondly, the scaling exponent of the gravity model based on the inverse distance relationship is revealed to be the ratio of the fractal dimension of networks of cities to that of hierarchies of cities. The value of the scaling exponent is then shown to approach to 2, which corresponds to the value of the power exponent of the law of gravity in classical physics. Thirdly, the inverse power function is demonstrated to be more acceptable than the negative exponential function as an impedance function of the gravity model. The limits of application of different gravity models based on different impedance functions are brought to light. Applying the expanded theory and models to China's interregional flows yields satisfying results, which in turn lend further support to the expanded theory and models.
description: 24 pages, 2 figures, 7 tables
Neue Methoden zur diastereo- und enantioselektiven Synthese von 8-oxabicyclo(3.2.1)oct-6-en-3-onen
Creators: name: Pierau, Sabine
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 1997
Subjects: subject: Asymmetrische Synthese
subject: Oxabicyclooctenonderivate
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Ranunculus thora L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: R. Thora L. Cat. 8 und 420. Der Angabe aus dem Distr.3 ist der Name des Gewährsmannes:BEAUVERD,zuzufügen. In den Lemanischen Alpen (Distr. l) nach BRIQUET «sehr verbreitet».
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Volume-limited radio survey of ultracool dwarfs
Creators: name: Antonova, A.
name: Hallinan, G.
name: Doyle, J. G.
name: Yu, S.
name: Kuznetsov, A.
name: Metodieva, Y.
name: Golden, A.
name: Cruz, K. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We conducted a volume-limited survey at 4.9 GHz of 32 nearby ultracool dwarfs with spectral types covering the range M7 -- T8. A statistical analysis was performed on the combined data from the present survey and previous radio observations of ultracool dwarfs. Whilst no radio emission was detected from any of the targets, significant upper limits were placed on the radio luminosities that are below the luminosities of previously detected ultracool dwarfs. Combining our results with those from the literature gives a detection rate for dwarfs in the spectral range M7 -- L3.5 of ~ 9%. In comparison, only one dwarf later than L3.5 is detected in 53 observations. We report the observed detection rate as a function of spectral type, and the number distribution of the dwarfs as a function of spectral type and rotation velocity. The radio observations to date point to a drop in the detection rate toward the ultracool dwarfs. However, the emission levels of detected ultracool dwarfs are comparable to those of earlier type active M dwarfs, which may imply that a mildly relativistic electron beam or a strong magnetic field can exist in ultracool dwarfs. Fast rotation may be a sufficient condition to produce magnetic fields strengths of several hundreds Gauss to several kilo Gauss, as suggested by the data for the active ultracool dwarfs with known rotation rates. A possible reason for the non-detection of radio emission from some dwarfs is that maybe the centrifugal acceleration mechanism in these dwarfs is weak (due to a low rotation rate) and thus cannot provide the necessary density and/or energy of accelerated electrons. An alternative explanation could be long-term variability, as is the case for several ultracool dwarfs whose radio emission varies considerably over long periods with emission levels dropping below the detection limit in some instances.
description: accepted to Astronomy and Astrophysics
Fairness in Academic Course Timetabling
Creators: name: Mühlenthaler, Moritz
name: Wanka, Rolf
Publisher: name: arXiv
Year: 2013
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences
subject: I.2.8; F.2.2

description: We consider the problem of creating fair course timetables in the setting of a university. Our motivation is to improve the overall satisfaction of individuals concerned (students, teachers, etc.) by providing a fair timetable to them. The central idea is that undesirable arrangements in the course timetable, i.e., violations of soft constraints, should be distributed in a fair way among the individuals. We propose two formulations for the fair course timetabling problem that are based on max-min fairness and Jain's fairness index, respectively. Furthermore, we present and experimentally evaluate an optimization algorithm based on simulated annealing for solving max-min fair course timetabling problems. The new contribution is concerned with measuring the energy difference between two timetables, i.e., how much worse a timetable is compared to another timetable with respect to max-min fairness. We introduce three different energy difference measures and evaluate their impact on the overall algorithm performance. The second proposed problem formulation focuses on the tradeoff between fairness and the total amount of soft constraint violations. Our experimental evaluation shows that the known best solutions to the ITC2007 curriculum-based course timetabling instances are quite fair with respect to Jain's fairness index. However, the experiments also show that the fairness can be improved further for only a rather small increase in the total amount of soft constraint violations.
description: appeared in PATAT 2012, pp. 114-130
Elektronenspektroskopische Untersuchungen zur Adsorption von Salicylsäure und Wasser an epitaktischen Alkalihalogenidoberflächen
Creators: name: Malaske, Ulrich
Publisher: name: Hannover : Universität Hannover
Year: 1997
Subjects: subject: Alkalihalogenide
subject: Oberfläche
subject: Salicylsäure
subject: Wasser
subject: Adsorption
subject: Elektronenspektroskopie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Green chemistry: polychelatogens for water purification and the development of an organocatalytic enantioselective [1,2]-Stevens rearrangement
Creators: name: Masand, Shruti A.
Publisher: name: No Publisher Supplied
Year: 2022

description: Nitrogen and sulfur ylides find extensive use in synthetic organic chemistry. N-allyl and -benzyl ylides are prone to [2,3]-rearrangement and the competing [1,2]- rearrangement (or Steven’s rearrangement). In contrast to the [2,3]-sigmatropic rearrangement, a catalytic asymmetric variant of the Stevens rearrangement of N-allyl or -benzyl ylides remains elusive, and the reaction mechanism has been debated in the literature since the 1950‘s. Diastereoselective versions of Steven’s 1,2-rearrangements have been exploited in synthesis to establish complex polycyclic backbones of alkaloids but require preinstallation of chiral centers. A catalytic enantioselective Steven’s rearrangement of N-allyl or -benzyl ammonium ylides would circumvent this requirement, thereby revolutionizing alkaloid synthesis. Chapter one describes the recent developments in [1,2]-Stevens rearrangement. Chapter two of this thesis describes efforts towards successfully developing an organocatalytic enantioselective [1,2]-Stevens rearrangement.Considering the present demands for potable water around the world and even in this country, the need for technologies to improve water quality has never been more important. In this context, chapter three describes the synthesis of a polychelatogen derived from bio-renewable lactide. It is a water-soluble polythioether containing hydroxy and carboxylate chelating groups that aid in binding to heavy metals like lead. Additionally, it was observed that its binding is not affected by the presence of metal cations such as Na+, K+, Ca2+, which are commonly found in drinking water sources. Using Grubbs third generation catalyst, we can obtain polymers with controlled molecular weights. Interestingly, the kinetics of polymerization is stereochemistry dependent. The binding capacity to other heavy metals such as Ni2+, Zn2+, Cd2+ and Cr6+ was studied at pH 6 and both polymers demonstrated good binding to all metals except Cr6+. This technology can be extended to the use of polymer resins and may find future use in water purification.
The Earth's Frame Dragging via Laser Ranged Satellites: a Response to 'Some considerations on the present-day results for the detection of frame-dragging after the final outcome of GP-B' by L. Iorio [arXiv:1105.4145]
Creators: name: Ries, J. C.
name: Ciufolini, I.
name: Pavlis, E. C.
name: Paolozzi, A.
name: Koenig, R.
name: Matzner, R. A.
name: Neumayer, G. Sindoniand H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this note, we reply to the preceding paper by Iorio: "Some considerations on the present-day results for the detection of frame-dragging after the final outcome of GP-B, Europhysics Letters", we address criticisms regarding the Lense-Thirring frame-dragging experiment results obtained from the laser ranging to the two LAGEOS satellites.
Pulse phase and precession phase resolved spectroscopy of Her X-1: studying a representative Main-On with RXTE
Creators: name: Vasco, D.
name: Staubert, R.
name: Klochkov, D.
name: Santangelo, A.
name: Shakura, N.
name: Postnov, K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We performed a detailed pulse phase resolved spectroscopy of the accreting binary X-ray pulsar Her X-1 in the energy range 3.5-75 keV and have established pulse phase profiles for all spectral parameters. For the centroid of the cyclotron line, the photon index and the flux of the 6.4 keV iron line, we have studied the variation as a function of 35 d phase. We analyzed RXTE observations of the Main-On of November 2002. Four different time intervals of about 1 d duration were selected to provide a good coverage of a complete Main-On. The intervals are centered at 35 d phase 0.03, 0.10, 0.15, and 0.20, respectively. All spectral parameters show a strong modulation with pulse phase. While the centroid energy of the cyclotron line follows roughly the shape of the pulse profile, both the photon index and the iron line intensity exhibit distinct minima around the peak of the X-ray pulse. With respect to variations of the observed profiles with 35 d phase, we find that there is a clear evolution of the shape of the pulse profiles (flux versus pulse phase), a moderate increase of the maximum cyclotron line energy (found around pulse phase 0.7), but no significant evolution of the shape of the pulse phase profiles of the cyclotron line energy, the spectral power law index or the iron line intensity. The variation of spectral parameters as a function of the pulse phase provides important information about the system: 1. the disappearance of the Fe line flux near the highest continuum flux may be an indication of a hollow cone geometry of the accretion structure; ii. the apparent non-dependence of the cyclotron line energy profiles on 35 d phase provides a new possibility to test the model of free precession of the neutron star, proposed to be responsible for the systematic variations in the pulse profiles.
description: 10 pages, 11 figures, Accepted by A&A on the 22/12/2012
Transient growth mechanisms of low Reynolds number flow over a low-pressure turbine blade
Creators: name: Sharma, AS
name: Abdessemed, N
name: Sherwin, SJ
name: Theofilis, V
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: A direct transient growth analysis for three-dimensional perturbations to flow past a periodic array of T-106/300 low-pressure turbine fan blades is presented. The methodology is based on a singular value decomposition of the flow evolution operator, linearised about a steady or periodic base flow. This analysis yields the optimal growth modes. Previous work on global mode stability analysis of this flow geometry showed the flow is asymptotically stable, indicating a non-modal explanation of transition may be more appropriate. The present work extends previous investigations into the transient growth around a steady base flow, to higher Reynolds numbers and periodic base flows. It is found that the notable transient growth of the optimal modes suggests a plausible route to transition in comparison to modal growth for this configuration. The spatial extent and localisation of the optimal modes is examined and possible physical triggering mechanisms are discussed. It is found that for longer times and longer spanwise wavelengths, a separation in the shear layer excites the wake mode. For shorter times and spanwise wavelengths, smaller growth associated with excitation of the near wake are observed.
title: C. W. Ceram: Der erste Amerikaner. Das Rätsel des vor-kolumbischen Indianers. Hamburg 1972
Creators: name: Müller-Beck, Hansjürgen
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: C. W. Ceram, Der erste Amerikaner. Das Rätsel des vor-kolumbischen Indianers. Rowohlt Hamburg 1972, 373 S. 48 Taf. und zahlreiche Textaab.
Fokussieren und Kühlen neutraler Atome in starken Dipolpotentialen
Creators: name: Schiffer, Markus
Publisher: name: Hannover : Universität Hannover
Year: 1997
Subjects: subject: Quantum optics
subject: laser cooling
subject: atom optics
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie

description: [no abstract]
An exact analytic treatment of propagating mass accretion rate fluctuations in X-ray binaries
Creators: name: Ingram, Adam
name: van der Klis, Michiel
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Many statistical properties of the aperiodic variability observed in X-ray radiation from accreting compact objects can be naturally explained by the propagating fluctuations model. This considers variations in mass accretion rate to be stirred up throughout the accretion flow. Variations from the outer regions of the accretion flow will propagate towards the central object, modulating the variations from the inner regions and eventually modulating the radiation, giving rise to the observed linear RMS-flux relation and also Fourier frequency dependent time lags. Previous treatments of this model have relied on computationally intensive Monte Carlo simulations which can only yield an estimate of statistical properties such as the power spectrum. Here, we find exact and analytic expressions for the power spectrum and lag spectrum predicted by the same model. We use our calculation to fit the model of Ingram & Done (2012) to a power spectrum of XTE J1550-564. The result we present here will apply to any treatment of the propagating fluctuations model and thus provides a very powerful tool for future theoretical modelling.
description: 10 pages, 6 figures
title: Kommentierte Bibliographie zum Paläolithikum und Mesolithikum für das deutsche Sprachgebiet 1970 und 1971
Creators: name: Albrecht, Gerd
name: Hahn, Joachim
name: Müller-Beck, Hansjürgen
Publisher: name: University Library Heidelberg
Year: 2016

description: [nicht vorhanden / not available]
Dissipation and Entropy Production in Deterministic Heat Conduction of Quasi-one-dimensional Systems
Creators: name: Morriss, Gary P.
name: Truant, Daniel P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We explore the consequences of a deterministic microscopic thermostat-reservoir contact mechanism. With different temperature reservoirs at each end of a two-dimensional system, a heat current is produced and the system has an anomalous thermal conductivity. The microscopic form for the local heat flux vector is derived and both the kinetic and potential contributions are calculated. The total heat flux vector is shown to satisfy the continuity equation. The properties of this nonequilibrium steady state are studied as a function of system size and temperature gradient identifying key scaling relations for the local fluid properties and separating bulk and boundary effects. The local entropy density calculated from the local equilibrium distribution is shown to be a very good approximation to the entropy density calculated directly from velocity distribution even for systems that are far from equilibrium. The dissipation and kinetic entropy production and flux are compared quantitatively and the differing mechanisms discussed within the BGY approximation. For equal temperature reservoirs the entropy production near the reservoir walls is shown to be proportional to the local phase space contraction calculated from the tangent space dynamics. However, for unequal temperatures, the connection between local entropy production and local phase space contraction is more complicated.
Dynamik und räumliche Korrelationen in verallgemeinerten Spinleitern
Creators: name: Neugebauer, Ulrich
Publisher: name: Hannover : Universität Hannover
Year: 1997
Subjects: subject: Spinkette
subject: Diagonalisierung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie

description: [no abstract]
Molekularbiologische Untersuchungen zur Charakterisierung des Uroguanylin-Gens
Creators: name: Hill, Oliver
Publisher: name: Hannover : Universität Hannover
Year: 1997
Subjects: subject: Guanylin
subject: uroguanylin
subject: guanylyl-cyclase-C
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Zur oszillierenden Elektrodenkinetik an der Fest-fest-Phasengrenze Me AgX
Creators: name: Rosenkranz, Christian
Publisher: name: Hannover : Universität Hannover
Year: 1997
Subjects: subject: Übergangsmetall
subject: Silberhalogenide
subject: Grenzfläche
subject: Oszillierende Reaktion
subject: Edelmetall
subject: Elektrode
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
The GROUSE project III: Ks-band observations of the thermal emission from WASP-33b
Creators: name: de Mooij, E. J. W.
name: Brogi, M.
name: de Kok, R. J.
name: Snellen, I. A. G.
name: Kenworthy, M. A.
name: Karjalainen, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In recent years, day-side emission from about a dozen hot Jupiters has been detected through ground-based secondary eclipse observations in the near-infrared. These near-infrared observations are vital for determining the energy budgets of hot Jupiters, since they probe the planet's spectral energy distribution near its peak. The aim of this work is to measure the Ks-band secondary eclipse depth of WASP-33b, the first planet discovered to transit an A-type star. This planet receives the highest level of irradiation of all transiting planets discovered to date. Furthermore, its host-star shows pulsations and is classified as a low-amplitude delta-Scuti. As part of our GROUnd-based Secondary Eclipse (GROUSE) project we have obtained observations of two separate secondary eclipses of WASP-33b in the Ks-band using the LIRIS instrument on the William Herschel Telescope (WHT). The telescope was significantly defocused to avoid saturation of the detector for this bright star (K~7.5). To increase the stability and the cadence of the observations, they were performed in staring mode. We collected a total of 5100 and 6900 frames for the first and the second night respectively, both with an average cadence of 3.3 seconds. On the second night the eclipse is detected at the 12-sigma level, with a measured eclipse depth of 0.244+0.027-0.020 %. This eclipse depth corresponds to a brightness temperature of 3270+115-160 K. The measured brightness temperature on the second night is consistent with the expected equilibrium temperature for a planet with a very low albedo and a rapid re-radiation of the absorbed stellar light. For the other night the short out-of-eclipse baseline prevents good corrections for the stellar pulsations and systematic effects, which makes this dataset unreliable for eclipse depth measurements. This demonstrates the need of getting a sufficient out-of-eclipse baseline.
description: 12 pages, 10 figures. Accepted for publication in Astronomy and Astrophysics
Enantioselektive Cycloadditionssequenzen
Creators: name: Borm, Claudia
Publisher: name: Hannover : Universität Hannover
Year: 1997
Subjects: subject: Diels-Alder-reaction
subject: kinetic resolution
subject: retro-Diels-Alder-reaction
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Fine structures in the atmosphere above a sunspot umbra
Creators: name: Bharti, L.
name: Hirzberger, J.
name: Solanki, S. K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present simultaneous photospheric and chromospheric observations of the trailing sunspot in NOAA 10904, obtained with the Swedish Solar Telescope (SST) La Palma, Canary Islands. Time series of high resolution \ion{Ca}{ii}\,$H$ images show transient jet-like structures in sunspot umbrae are elongated, which we call umbral microjets. These jets are directed roughly parallel to nearby penumbral microjets, suggesting that they are aligned with the background magnetic field. In general, first a bright dot-like structure appears, from which a jet later emerges, although some jets appear without an associated chromospheric dot. Bright photospheric umbral dots are associated with umbral microjets arising in the outer umbra. Nevertheless, a one-to-one correspondence between jet-like events and underlying umbral dots is not seen. They are typically less than 1\arcsec ~long and less than 0\farcs3 wide. The typical lifetime of umbral microjets is around one minute. The brightness of these structures increases from the center of the umbra towards the umbra-penumbra boundary along with the brightness of the local background.
description: 5 pages, 6 figures. Accepted for publication in A&A Letter
Effect of charged line defects on conductivity in graphene: numerical Kubo and analytical Boltzmann approaches
Creators: name: Radchenko, T. M.
name: Shylau, A. A.
name: Zozoulenko, I. V.
name: Ferreira, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Charge carrier transport in single-layer graphene with one-dimensional charged defects is studied theoretically. Extended charged defects, considered an important factor for mobility degradation in chemically-vapor-deposited graphene, are described by a self-consistent Thomas-Fermi potential. A numerical study of electronic transport is performed by means of a time-dependent real-space Kubo approach in honeycomb lattices containing millions of carbon atoms, capturing the linear response of realistic size systems in the highly disordered regime. Our numerical calculations are complemented with a kinetic transport theory describing charge transport in the weak scattering limit. The semiclassical transport lifetimes are obtained by computing scattered amplitudes within the second Born approximation. The transport electron-hole asymmetry found in the semiclassical approach is consistent with the Kubo calculations. In the strong scattering regime, the conductivity is found to be a sublinear function of electronic density and weakly dependent on the Thomas-Fermi screening wavelength. We attribute this atypical behavior to the extended nature of one-dimensional charged defects. Our results are consistent with recent experimental reports.
description: 15 pages, 9 figures
High energy collision cascades in tungsten: dislocation loops structure and clustering scaling laws
Creators: name: Sand, A. E.
name: Dudarev, S. L.
name: Nordlund, K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent experiments on in-situ high-energy self-ion irradiation of tungsten (W) show the occurrence of unusual cascade damage effects resulting from single ion impacts, shedding light on the nature of radiation damage expected in the tungsten components of a fusion reactor. In this paper, we investigate the dynamics of defect production in 150 keV collision cascades in W at atomic resolution, using molecular dynamics simulations and comparing predictions with experimental observations. We show that cascades in W exhibit no subcascade break-up even at high energies, producing a massive, unbroken molten area, which facilitates the formation of large defect clusters. Simulations show evidence of the formation of both 1/2<111> and <100> interstitial-type dislocation loops, as well as the occurrence of cascade collapse resulting in <100> vacancy-type dislocation loops, in excellent agreement with experimental observations. The fractal nature of the cascades gives rise to a scale-less power law type size distribution of defect clusters.
description: 6 pages, 3 figures
⚘ The singularity of relation and the threads of communication ☀ Paul Bains
Creators: name: Bains, Paul
Publisher: name: Instituto de Estudos Filosóficos
Year: 2022
Subjects: subject: Cadacualtez
subject: Communication
subject: German-Argentinian neurobiology
subject: John Deely
subject: Mario Crocco
subject: Neurosciences
subject: FOS: Clinical medicine
subject: Relation
subject: Semiotics

description: Broaden your horizons... and you will be a party to reflecting upon the cadacualtic sophistication of all beings.

This event is part of the activities of the 2022 International Open Seminar on Semiotics: a Tribute to John Deely on the Fifth Anniversary of His Passing, cooperatively organized by the Institute for Philosophical Studies of the Faculty of Arts and Humanities of the University of Coimbra, the Lyceum Institute, the Deely Project, Saint Vincent College, the Iranian Society for Phenomenology at the Iranian Political Science Association, the International Association for Semiotics of Space and Time, the Institute for Scientific Information on Social Sciences of the Russian Academy of Sciences, the Semiotic Society of America, the American Maritain Association, the International Association for Semiotic Studies, the International Society for Biosemiotic Studies, the International Center for Semiotics and Intercultural Dialogue, Moscow State Academic University for the Humanities and the Mansarda Acesa with the support of the FCT - Foundation for Science and Technology, I.P., of the Ministry of Science, Technology and Higher Education of the Government of Portugal under the UID/FIL/00010/2020 project.

***

Paul Bains is an independent researcher. He is a published author and translator (French to English) who has translated works by Felix Guattari (Chaosmosis: An Ethico-Aesthetic Paradigm) and Isabelle Stengers (Power and Invention: Situating Science). His Ph.D. thesis was published as 'The primacy of semiosis: an ontology of relations' (University of Toronto Press, 2006).

***

Homepage: https://www.uc.pt/fluc/uidief/act/io2s
Auditorium: https://www.uc.pt/fluc/uidief/act/io2s/auditorium
Städtische Geschichtskultur und Historiographie : das Bild der Stadt Hannover im Spiegel ihrer Geschichtsdarstellungen von den Anfängen bis zum Verlust der städtischen Autonomie
Creators: name: Kreter, Karljosef
Publisher: name: Hannover : Universität Hannover
Year: 1996
Subjects: subject: Hannover
subject: Geschichtsschreibung
subject: Geschichte Anfänge-1714
subject: Dewey Decimal Classification::900 | Geschichte und Geografie::940 | Geschichte Europas::943 | Geschichte Mitteleuropas; Deutschlands

description: [no abstract]
Stereoselektive Darstellung von oxa- und dioxatricyclischen Substrukturen des Dictyoxetans
Creators: name: Wittenberg, Jens
Publisher: name: Hannover : Universität Hannover
Year: 1998
Subjects: subject: Dictyoxetan
subject: Asymmetrische Synthese
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
Pharmaka-Interaktionen der HMG-CoA-Reduktase-Inhibitoren Lovastatin und Pravastatin : Hemmung des Metabolismus in vitro in der Leber und im Dünndarm
Creators: name: Jacobsen, Wolfgang
Publisher: name: Hannover : Universität Hannover
Year: 1998
Subjects: subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
The star formation history of the Large Magellanic Cloud star clusters NGC1846 and NGC1783
Creators: name: Rubele, Stefano
name: Girardi, Leo
name: Kozhurina-Platais, Vera
name: Kerber, Leandro
name: Goudfrooij, Paul
name: Bressan, Alessandro
name: Marigo, Paola
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: NGC1846 and NGC1783 are two massive star clusters in the Large Magellanic Cloud, hosting both an extended main sequence turn-off and a dual clump of red giants. They present similar masses but differ mainly in angular size. Starting from their high-quality ACS data in the F435W, F555W and F814W filters, and updated sets of stellar evolutionary tracks, we derive their star formation rates as a function of age, SFR(t), by means of the classical method of CMD reconstruction which is usually applied to nearby galaxies. The method confirms the extended periods of star formation derived from previous analysis of the same data. When the analysis is performed for a finer resolution in age, we find clear evidence for a 50-Myr long hiatus between the oldest peak in the SFR(t), and a second prolonged period of star formation, in both clusters. For the more compact cluster NGC1846, there seems to be no significant difference between the SFR(t) in the cluster centre and in an annulus with radii between 20 and 60 arcsec (from 4.8 to 15.4 pc). The same does not occur in the more extended NGC1783 cluster, where the outer ring (between 33 and 107 arcsec, from 8.0 to 25.9 pc) is found to be slightly younger than the centre. We also explore the best-fitting slope of the present-day mass function and binary fraction for the different cluster regions, finding hints of a varying mass function between centre and outer ring in NGC1783. These findings are discussed within the present scenarios for the formation of clusters with multiple turn-offs.
description: 16 pages, to appear in MNRAS
Optimal design for linear models with correlated observations
Creators: name: Dette, Holger
name: Pepelyshev, Andrey
name: Zhigljavsky, Anatoly
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: In the common linear regression model the problem of determining optimal designs for least squares estimation is considered in the case where the observations are correlated. A necessary condition for the optimality of a given design is provided, which extends the classical equivalence theory for optimal designs in models with uncorrelated errors to the case of dependent data. If the regression functions are eigenfunctions of an integral operator defined by the covariance kernel, it is shown that the corresponding measure defines a universally optimal design. For several models universally optimal designs can be identified explicitly. In particular, it is proved that the uniform distribution is universally optimal for a class of trigonometric regression models with a broad class of covariance kernels and that the arcsine distribution is universally optimal for the polynomial regression model with correlation structure defined by the logarithmic potential. To the best knowledge of the authors these findings provide the first explicit results on optimal designs for regression models with correlated observations, which are not restricted to the location scale model.
description: Published in at http://dx.doi.org/10.1214/12-AOS1079 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Isolierung und Charakterisierung von hNLP, einem humanen zirkulierenden Peptid
Creators: name: Kleemeier, Burkhard
Publisher: name: Hannover : Universität Hannover
Year: 1998
Subjects: subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
OPEN-SOURCE FOR RAMAN SPECTROSCOPY HARMONISATION
Creators: name: Georgiev, Georgi
name: Lelinger, Dirk
name: Iliev, Luchesar
name: Jeliazkov, Vedrin
name: Banares, Miguel
name: Portela, Raquel
name: Jeliazkova, Nina
Publisher: name: Zenodo
Year: 2023

description: Raman spectroscopy is becoming a key technology used in the research and development for characterization of materials. Ideally, spectra should be comparable and linked to specific material properties. However, in real life, Raman spectra differ between instruments and depend on the spectrometer, optical path, or sample environment, among others, and only a limited number of calibration standards for Raman spectroscopy are available to date 10.1177/00037028221090988. The CHARISMA EU’s Horizon 2020 project (No. 952921) aims to harmonize and standardize characterization by Raman spectroscopy, including hardware, measurement protocols, and in silico methods, enabling end users to share digital spectral data through a FAIR database across domains and across the entire life cycle of diverse products.
 We present https://github.com/h2020charisma/ramanchada2, an open-source, MIT-licensed, Python package that collects existing and novel state-of-the-art algorithms allowing the users to process Raman spectra, perform energy and efficiency calibrations and generate synthetic spectra based on user specification and/or data from DFT simulations. Installation with pip is available.ramanchada2 is used as a core dependency of a FAIR Raman database, implemented as a Python API with a cloud backend and HDF5 storage for Raman spectra and metadata. The metadata query and spectra search API is compatible with the eNanoMapper database and the NanoSafety Data Interface 10.1038/s41565-021-00911-6.
 To facilitate Raman spectra analysis by end users, we are also developing oranchada, an user friendly wrapper of all ramanchada2 functionality. It is available as an add-on for the popular data mining software Orange https://github.com/h2020charisma/oranchada.
 For the harmonisation of Raman spectroscopy terminology, a collaboratively edited knowledge base is established at https://wiki.charisma.ideaconsult.net/. It is implemented with Wikibase, an extension for MediaWiki.
Neue Wege zu enantiomerenreinen Alkaloidbausteinen
Creators: name: Arndt, Jan-Dirk
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 1998
Subjects: subject: Alkaloide
subject: Asymmetrische Synthese
subject: Diels-Alder-Reaktion
subject: Partialstruktur
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Broad Band X-Ray Spectra of Two Low-luminosity Active Galactic Nuclei NGC 1566 and NGC 4941
Creators: name: Kawamuro, Taiki
name: Ueda, Yoshihiro
name: Tazaki, Fumie
name: Terashima, Yuichi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the first broad band X-ray spectra of the low luminosity active galactic nuclei (LLAGN) NGC 1566 (type 1.5) and NGC 4941 (type 2) observed with Suzaku and Swift/BAT covering the 0.5-195 keV band. Both targets have hard X-ray luminosities of ~ 10^{41-42} ergs/s in the 15-55 keV band. The spectra of the nucleus are well reproduced by a sum of partially or fully covered transmitted emission and its reflection from the accretion disk, reprocessed emission from the torus accompanied by a strong narrow iron-Kαline, and a scattered component (for NGC 4941). We do not significantly detect a broad iron-Kαline from the inner accretion disk in both targets, and obtain an upper limit on the corresponding solid angle of Ω/2π< 0.3 in NGC 1566. The reflection strength from the torus is moderate, Ω/2π=0.45^{+0.13}_{-0.10} in NGC 1566 and Ω/2π=0.64^{+0.69}_{-0.27} in NGC 4941. Comparison of the equivalent width of the narrow iron-Kαline with a model prediction based on a simple torus geometry constrains its half-opening angle to be θ_oa ~ 60-70 degree in NGC 4941. These results agree with the obscured AGN fraction obtained from hard X-ray and mid-infrared selected samples at similar luminosities. Our results support the implication that the averaged covering fraction of AGN tori is peaked at L 10^{42-43} ergs/s but decreases toward lower luminosities.
description: 11 pages, 6 figures, accepted for publication in ApJ