cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fluctuation-dissipation theorem for the microcanonical ensemble
Creators: name: Bonanca, Marcus
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik

description: A derivation of the fluctuation-dissipation theorem for the microcanonical ensemble is presented using linear response theory. The theorem is stated as a relation between the frequency spectra of the symmetric correlation and response functions. When the system is not in the thermodynamic limit, this result can be viewed as an extension of the fluctuation-dissipation relations to a situation where dynamical fluctuations determine the response. Therefore, the relation presented here between equilibrium fluctuations and response can have a very different physical nature from the usual one in the canonical ensemble. These considerations imply that the fluctuation-dissipation theorem is not restricted to the context of the canonical ensemble, where it is usually derived. Dispersion relations and sum rules are also obtained and discussed in the present case. Although analogous to the Kramers-Kronig relations, they are not related to the frequency spectrum but to the energy dependence of the response function.
Christian Feldmann, Hildegard von Bingen
Creators: name: Lautenschläger, Gabriele
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Exchange and correlation effects on spin Coulomb drag in a quasi-two-dimensional electron system
Creators: name: Badalyan, Samvel
name: Kim, Chang Sub
name: Vignale, Giovanni
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik
subject: 72.25.Dc; 73.40.c

description: We investigate the effect of many-body electronic correlations on spin Coulomb drag (SCD) beyond the random phase approximation (RPA). We make use of the fully spin-resolved static and dynamical many-body local field factors of the two-dimensional electron gas (2DEG) to improve the calculations of the particle-hole and plasmon-mediated contributions to the SCD. Also, we incorporate in our calculations the transverse thickness of the quantum well in which the 2DEG resides. In contrast to the conventional charge Coulomb drag, in the SCD the effect of layer thickness is significant even at relatively high temperature and densities. The final outcome of our study is that the enhancement of the spin drag caused by many-body local field effects largely compensates the reduction of the effect coming from the finite well thickness, restoring good agreement with the experimental observations by C.P. Weber et al., Nature 437 (2005) 1330.
Higher order quark-mesonic scattering processes and the phase structure of QCD
Creators: name: Pawlowski, Jan M.
name: Rennecke, Fabian
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the impact of higher order quark-meson scattering processes on the chiral phase structure of two-flavour QCD at finite temperature and quark density. Thermal, density and quantum fluctuations are included within a functional renormalisation group approach to the quark-meson model. We present results on the chiral phase boundary, the critical endpoint, and the curvature of the phase transition line at vanishing density.
description: 20 pages, 14 figures. v2: journal version
Alois M. Haas, Kunst rechter Gelassenheit
Creators: name: Egerding, Michael
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Walter Senner, Johannes von Sterngassen OP und sein Sentenzenkommentar
Creators: name: Prügl, Thomas
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Closed-orbit theory of spatial density oscillations in finite fermion systems
Creators: name: Roccia, J.
name: Brack, Matthias
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik

description: We investigate the particle and kinetic-energy densities for $N$ non-interacting fermions confined in a local potential. Using Gutzwiller's semi-classical Green function, we describe the oscillating parts of the densities in terms of closed non-periodic classical orbits. We derive universal relations between the oscillating parts of the densities for potentials with spherical symmetry in arbitrary dimensions, and a ``local virial theorem'' valid also for arbitrary non-integrable potentials. We give simple analytical formulae for the density oscillations in a one-dimensional potential.
Data for my research: Where can I get it, where do I take it, what can I do with it, how do I use it in my resume?
Creators: name: Trippel, Thorsten
Publisher: name: Zenodo
Year: 2023
Subjects: RDM
Research Data Management
NFDI
CLARIN
CLARIN-D
Text+
Textplus NFDI
Research data

description: Looking at the Research Data Infrastructures CLARIN in Europe and Text+ in Germany
"Reproducibility crisis" and "empirical turn" are only two keywords when it comes to providing reasons for research data management. Research data is omnipresent and with the more and more automatic data processing procedures, they become even more important. However, just because new methods require data and produce data, this does not mean that data are easily accessible, reusable or even make a difference in the CV of a researcher, even if a large portion of research goes into data creation, acquisition, preparation, and analysis. In this talk I will present where we find data in the research process, where we may find appropriate support for data management and advocate for a procedure for including it in research publications and resumes. 
This presentation relies on work within the BMBF-funded project CLARIN-D. It also builds on work within the German National Research Data Infrastructure (NFDI) consortium Text+, DFG project number 460033370.
Bernhard von Clairvaux, Sämtliche Werke Bd. VI u. VII
Creators: name: Hallensleben, Barbara
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Neue Richtungen in der hoch- und spätmittelalterlichen Bibelexegese, hg. v. Robert E. Lerner
Creators: name: Feld, Helmut
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
OPTIMIZED RELAY COORDINATION FOR SUPERIOR ELECTRICAL PERFORMANCE: LESSONS FROM INDORAMA FERTILIZER AND CHEMICALS
Creators: name: Engr. Grace, E. Nwogu
name: Johnson, T. Amadi
Publisher: name: AYDEN JOURNAL
Year: 2024
Subjects: Fault Analysis, ETAP, Inverse Definite Minimum Time, Motor Control, Relay Coordination, Short Circuit Analysis.

description: The research addresses the challenge of inadequate relay coordination at the motor control center of Indorama Fertilizer and Chemicals Limited. Utilizing the Electrical Transient Analyzer program (ETAP 19.0.1), the study employs methodologies such as Load Flow Analysis, Short Circuit Analysis, and Relay Setting and Coordination with Standard Inverse Time Delay (SIT) to model and simulate the electrical network. Findings reveal that during a base case scenario, a trip sequence failure occurs when a three-phase short circuit fault arises at the terminal of the synchronous motor labeled (syn1). The backup relay (R4) activates first at 286.5 ms, followed by the primary relay (R6) at 408.1 ms, relay 2 at 630.4 ms, and relay 1 at 864.5 ms. This miscoordination results in a total blackout of the Motor Control Unit (Cmtr1) due to a single downstream fault. To enhance coordination, a new relay setting is proposed, implementing IEC standard inverse characteristics to replace the existing definite-minimum-time (DMT) scheme with a more adaptable inverse-definite-minimum-time (IDMT) scheme. The revised configuration reduces the relay operation time by over 35% compared to the original setup, providing better fault backup and significantly improving the relay's operational sequence and tripping times without major coordination issues
Moduli of curves as moduli of A-infinity structures
Creators: name: Polishchuk, Alexander
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We define and study the stack ${\mathcal U}^{ns,a}_{g,g}$ of (possibly singular) projective curves of arithmetic genus g with g smooth marked points forming an ample non-special divisor. We define an explicit closed embedding of a natural ${\mathbb G}_m^g$-torsor over ${\mathcal U}^{ns,a}_{g,g}$ into an affine space and give explicit equations of the universal curve (away from characteristics 2 and 3). This construction can be viewed as a generalization of the Weierstrass cubic and the j-invariant of an elliptic curve to the case g>1. Our main result is that in characteristics different from 2 and 3 our moduli space of non-special curves is isomorphic to the moduli space of minimal A-infinity structures on a certain finite-dimensional graded associative algebra $E_g$ (introduced in arXiv:1208.6332). We show how to compute explicitly the A-infinity structure associated with a curve $(C,p_1,...,p_g)$ in terms of certain canonical generators of the algebra of functions on $C-\{p_1,...,p_g\}$ and canonical formal parameters at the marked points. We study the GIT quotients associated with our representation of ${\mathcal U}^{ns,a}_{g,g}$ as the quotient of an affine scheme by ${\mathbb G}_m^g$ and show that some of the corresponding stack quotients give modular compactifications of ${\mathcal M}_{g,g}$ in the sense of arXiv:0902.3690. We also consider an analogous picture for curves of arithmetic genus 0 with n marked points which gives a new presentation of the moduli space of $ψ$-stable curves (also known as Boggi-stable curves) and its interpretation in terms of $A_\infty$-structures.
description: v1: 58 pages; v2: 69 pages; added a section on curves of arithmetic genus 0 and a section on the connection to Petri's analysis of a non-hyperelliptic curve in the canonical embeding; v3: 71 pages; minor improvements; v4: 72 pages, improved presentation in Section 2.4; v5: 74 pages, corrections in the proof of Theorem 1.2.4; v6: filled a gap in the proof of Corollary 4.2.5; minor corrections
Hans Christoph Stoodt, Katharismus im Untergrund
Creators: name: Segl, Peter
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
XALQARO KO'LAMDA AVTOMOBILDA TASHISH MUNOSABATLARINI TARTIBGA SOLISHGA QARATILGAN KOLLIZION MASALALAR
Creators: name: Umarov, Shahzodjon
Publisher: name: Zenodo
Year: 2023

description: Xalqaro ko'lamda yuk va yo'lovchilarni tashish Xalqaro xususiy huquq modulining muhim institut hisoblanadi. Ushbu maqola xalqaro ko'lamda yuk va yo'lovchilarni avtomobilda tashish jarayonida vujudga keluvchi kollizion masalalarini huquqiy tartibga solish bilan bog'liq munosabatlarni ochib beradi.
Herrscher, Helden, Heilige, hg. v. Ulrich Müller u. Werner Wunderlich
Creators: name: Signori, Gabriela
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Anomalous shell effect in the transition from a circular to a triangular billiard
Creators: name: Arita, K
name: Brack, Matthias
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik

description: We apply periodic orbit theory to a two-dimensional non-integrable billiard system whose boundary is varied smoothly from a circular to an equilateral triangular shape. Although the classical dynamics becomes chaotic with increasing triangular deformation, it exhibits an astonishingly pronounced shell effect on its way through the shape transition. A semiclassical analysis reveals that this shell effect emerges from a codimension-two bifurcation of the triangular periodic orbit. Gutzwiller's semiclassical trace formula, using a global uniform approximation for the bifurcation of the triangular orbit and including the contributions of the other isolated orbits, describes very well the coarse-grained quantum-mechanical level density of this system. We also discuss the role of discrete symmetry for the large shell effect obtained here.
Bernard McGinny, Die Mystik im Abendland Bd. 1
Creators: name: Egerding, Michael
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Optical response of highly excited particles in a strongly correlated system
Creators: name: Lenarčič, Zala
name: Golež, Denis
name: Bonča, Janez
name: Prelovšek, Peter
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a linear-response formalism for a system of correlated electrons out of equilibrium, as relevant for the probe optical absorption in pump-probe experiments. We consider the time dependent optical conductivity $σ(ω,t)$ and its nonequilibrium properties. As an application we numerically study a single highly excited charged particle in the spin background, as described within the two-dimensional $t$-$J$ model. Our results show that the optical sum rule approaches the equilibrium-like one very fast, however, the time evolution and the final asymptotic behavior of the absorption spectra in the finite systems considered still reveal dependence on the type of initial pump perturbation. This is observed in the evolution of its main features: the mid-infrared peak and the Drude weight.
description: 6 pages, 4 figures
Marie-Luise Windemuth, Das Hospital als Träger der Armenfürsorge im Mittelalter
Creators: name: Aderbauer, Herbert
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
ALL-Ready – Das europäische Netzwerk für Reallabore und Forschungsinfrastrukturen für die Agrarökologie: Vorbereitungsphase
Creators: name: Jónász, Gerda
name: Varga, Korinna
name: Csonka, Valéria
Publisher: name: Zenodo
Year: 2023

description: Das ALL-Ready Pilotnetzwerk:
 Die inspirierenden Beispiele und die
 Erfahrungen der Reallabore und
 Forschungsinfrastrukturen
 für die Agrarökologie in
 Europa und Kanada
The quantisation of normal velocity does not concentrate on hypersurfaces
Creators: name: Tacy, Melissa
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We seek to extend work by Christianson-Hassell-Toth \cite{CHT} on restrictions of Neumann data of Laplacian eigenfunctions to interior hypersurfaces to a general semiclassical setting. In the semiclassical regime the appropriate generalisation is to study the restrictions of the function $v=ν(x,hD)u$ where $ν(x,hD)$ is the operator defined by quantising the normal velocity observable. For the Laplacian $ν(x,hD)=\frac{1}{2}hD_ν$ where $ν$ is the normal to the hypersurface. We find that $||ν(x,hD)u||_{L^{2}(H)}\lesssim||u||_{L^{2}(M)}$ provided $u$ is an $O_{L^{2}}(h)$ quasimode of the semiclassical pseudodifferential operator $p(x,hD)$. This statement should be interpreted as a statement of non-concentration for the quantisation of normal velocity.
description: No change to major theorem from version 2. Some changes to technical results in Section 1. Final version
Symmetry and Spin Dephasing in (110)-Grown Quantum Wells
Creators: name: Bel'kov, V.
name: Olbrich, Peter
name: Tarasenko, S.
name: Schuh, Dieter
name: Wegscheider, Werner
name: Korn, Tobias
name: Schüller, Christian
name: Weiss, Dieter
name: Prettl, Wilhelm
name: Ganichev, Sergey
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik

description: Symmetry and spin dephasing in (110)-grown GaAs quantum wells (QWs) are investigated applying magnetic field induced photogalvanic effect and time-resolved Kerr rotation. We show that magnetic field induced photogalvanic effect provides a tool to probe the symmetry of (110)-grown quantum wells. The photocurrent is only observed for asymmetric structures but vanishes for symmetric QWs. Applying Kerr rotation we prove that in the latter case the spin relaxation time is maximal; therefore, these structures set the upper limit of spin dephasing in GaAs QWs. We also demonstrate that structure inversion asymmetry can be controllably tuned to zero by variation of delta-doping layer positions.
Semiclassical Mechanism for the Quantum Decay in Open Chaotic Systems
Creators: name: Waltner, Daniel
name: Gutiérrez, Martha
name: Goussev, Arseni
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik
subject: 05.45.Mt
subject: 03.65.Sq
subject: 05.45.Pq

description: We address the decay in open chaotic quantum systems and calculate semiclassical corrections to the classical exponential decay. We confirm random matrix predictions and, going beyond, calculate Ehrenfest time effects. To support our results we perform extensive numerical simulations. Within our approach we show that certain (previously unnoticed) pairs of interfering, correlated classical trajectories are of vital importance. They also provide the dynamical mechanism for related phenomena such as photo-ionization and -dissociation, for which we compute cross section correlations. Moreover, these orbits allow us to establish a semiclassical version of the continuity equation.
Heidi Leuppi, Der Liber Ordinarius des Konrad von Mure
Creators: name: Maurer, Helmut
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Trying to please everybody - taxonomies, politics, and objectivity
Creators: name: Alexander, Fran
Publisher: name: Zenodo
Year: 2009
Subjects: subject: taxonomies
subject: objectivity
subject: politics
subject: standards
subject: Longino framework
subject: https://iskouk.org/subjects/22THY8MD
subject: https://iskouk.org/subjects/Q79A7LQ5
subject: https://iskouk.org/subjects/M8F1HSYC

description: This poster describes a framework for analysing the objectivity of taxonomy projects and illuminating the political nature of practical taxonomy work. taxonomies; objectivity; politics; standards; Longino framework
Random Wave Functions with boundary and normalization constraints: Quantum statistical physics meets quantum chaos
Creators: name: Urbina, Juan Diego
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: 530 Physik

description: We present an improved version of Berry's ansatz able to incorporate exactly the existence of boundaries and the correct normalization of the eigenfunction into an ensemble of random waves. We then reformulate the Random Wave conjecture showing that in its new version it is a statement about the universal nature of eigenfunction fluctuations in systems with chaotic classical dynamics. The emergence of the universal results requires the use of both semiclassical methods and a new expansion for a very old problem in quantum statistical physics.
Control of electron spin and orbital resonances in quantum dots through spin-orbit interactions
Creators: name: Stano, Peter
name: Fabian, Jaroslav
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik

description: The influence of a resonant oscillating electromagnetic field on a single electron in coupled lateral quantum dots in the presence of phonon-induced relaxation and decoherence is investigated. Using symmetry arguments, it is shown that the spin and orbital resonances can be efficiently controlled by spin-orbit interactions. The control is possible due to the strong sensitivity of the Rabi frequency to the dot configuration (the orientation of the dot and the applied static magnetic field); the sensitivity is a result of the anisotropy of the spin-orbit interactions. The so-called easy passage configuration is shown to be particularly suitable for a magnetic manipulation of spin qubits, ensuring long spin relaxation times and protecting the spin qubits from electric field disturbances accompanying on-chip manipulations.
Dieter Kerber, Herrschaftsmittelpunkte im Erzstift Trier
Creators: name: Rückert, Maria Magdalena
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Hans-Josef Krey, Bischöfliche Herrschaft im Schatten des Königtums
Creators: name: Rückert, Maria Magdalena
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
WEIGHT-DIMENSIONAL AND VOLUMERIAN INDICATORS AND PHYSICAL AND MATHEMATICAL PROPERTIES CHARACTERISTIC FOR CENTRAL ASIAN VARIETIES OF MELONS
Creators: name: Tukhtamishev, Sayitkul
Publisher: name: Zenodo
Year: 2023

description: To calculate the parametric and power characteristics of the technological equipment used for the primary processing of melon fruits, it is necessary knowledge of mass - dimensional and volumetric indicators of its components and physical and mechanical properties.
Eva Sibylle/Gerhard Rösch, Kaiser Friedrich II. und sein Königreich Sizilien
Creators: name: Baaken, Gerhard
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Open Particles in Social Medium: Open Collaboration in GitHub
Creators: name: Shiyang Lai
Publisher: name: University of Chicago
Year: 2023
Subjects: subject: Open collaboration
subject: Open-source project
subject: Sociophysics
subject: GitHub

description: This thesis proposes an innovative approach for the comprehensive and structured modeling of online open collaboration. By conceptualizing individuals, teams, and collaborative environments as social atoms, molecules, and mediums respectively, it employs concepts and tools from physics and chemistry to illustrate human interactions. This research introduces an analogical framework that retains the fundamental principles of select traditional natural science instruments while also integrating more probabilistic and dynamic elements to address the disparities between the physical and social systems. It applies and adapts two tools and one concept from physics and chemistry - namely the collaborative periodic table (inspired by the periodic table of elements), the probabilistic collaboration equation (based on the reaction equation), and the social superposition state (derived from quantum physics). These tools and concepts are employed to study open collaboration on GitHub, leveraging a dataset sourced from the GitHub open-source community that includes collaborative data from hundreds of thousands of users. The findings of this study not only provide deeper insights into the behavior patterns of open collaboration participants but also illuminate a bottom-up strategy for future sociophysical pursuits.
Coherent Backscattering of Bose-Einstein Condensates in Two-Dimensional Disorder Potentials
Creators: name: Hartung, Michael
name: Wellens, Thomas
name: Müller, Cord A.
name: Richter, Klaus
name: Schlagheck, Peter
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik
subject: 05.60.Gg
subject: 03.75.Kk
subject: 67.85.-d
subject: 72.15.Rn

description: We study quantum transport of an interacting Bose-Einstein condensate in a two-dimensional disorder potential. In the limit of vanishing atom-atom interaction, a sharp cone in the angle-resolved density of the scattered matter wave is observed, arising from constructive interference between amplitudes propagating along reversed scattering paths. Weak interaction transforms this coherent backscattering peak into a pronounced dip, indicating destructive instead of constructive interference. We reproduce this result, obtained from the numerical integration of the Gross-Pitaevskii equation, by a diagrammatic theory of weak localization in presence of a nonlinearity.
Bernhard Schimmelpfennig, Könige und Fürsten, Kaiser und Papst nach dem Wormser Konkordat
Creators: name: Zimpel, Detlev
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Gerd Tellenbach, Ausgewählte Abhandlungen und Aufsätze Bd. 5
Creators: name: Köpf, Ulrich
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Gerhard Baaken, Imperium und Papsttum
Creators: name: Zimpel, Detlev
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Karl Martell in seiner Zeit, hg. v. Jörg Jarnut
Creators: name: Kortüm, Hans-Henning
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Bardeen-Cooper-Schrieffer Theory of Finite-Size Superconducting Metallic Grains
Creators: name: Garcia-Garcia, Antonio
name: Urbina, Juan Diego
name: Yuzbashyan, Emil
name: Richter, Klaus
name: Altshuler, Boris
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik
subject: 74.20.Fg
subject: 05.45.Mt
subject: 74.78.Na

description: We study finite size effects in superconducting metallic grains and determine the BCS order parameter and the low energy excitation spectrum in terms of the number of electrons, size, and shape of the grain. Our approach combines the BCS self-consistency condition, a semiclassical expansion for the spectral density and interaction matrix elements, and corrections to the BCS mean-field. In chaotic grains mesoscopic fluctuations of the matrix elements lead to a smooth dependence of the order parameter on the excitation energy. In the integrable case we observe shell effects when e.g. a small change in the electron number leads to large changes in the energy gap.
Bifurcation values of families of real curves
Creators: name: Joita, Cezar
name: Tibar, Mihai
Publisher: name: arXiv
Year: 2014
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: In more than two variables, detection of the bifurcation set of polynomial mapping $\bR^n \to \bR^p$, $n\ge p$, is a still unsolved problem. In this note we provide a solution for $n= p+1 \ge 3$.
description: small corrections
Papstgeschichte und Landesgeschichte
Creators: name: Kortüm, Hans-Henning
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Loschmidt echo for local perturbations: non-monotonic cross-over from the Fermi-golden-rule to the escape-rate regime
Creators: name: Goussev, Arseni
name: Waltner, Daniel
name: Richter, Klaus
name: Jalabert, Rodolfo A.
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik

description: We address the sensitivity of quantum mechanical time evolution by considering the time decay of the Loschmidt echo (LE) (or fidelity) for local perturbations of the Hamiltonian. Within a semiclassical approach, we derive analytical expressions for the LE decay for chaotic systems for the whole range from weak to strong local perturbations and identify different decay regimes which complement those known for the case of global perturbations. For weak perturbations, a Fermi-golden-rule (FGR)-type behavior is recovered. For strong perturbations, the escape-rate regime is reached, where the LE decays exponentially with a rate independent of the perturbation strength. The transition between the FGR regime and the escape-rate regime is non-monotonic, i.e. the rate of the exponential time-decay of the LE oscillates as a function of the perturbation strength. We further perform extensive quantum mechanical calculations of the LE based on numerical wave packet evolution, which strongly support our semiclassical theory. Finally, we discuss in some detail possible experimental realizations for observing the predicted behavior of the LE.
Süddeutsche Münzkataloge, Bd. 2-5
Creators: name: Wolf, Hubert
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Bibliographie zum Westfälischen Frieden, hg. v. Heinz Duchhardt
Creators: name: Maier, Franz Georg
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Nonequilibrium spin-dependent phenomena in mesoscopic superconductor-normal metal tunnel structures
Creators: name: Giazotto, F.
name: Taddei, F.
name: Fazio, R.
name: Beltram, F.
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: 530 Physik

description: We analyze the broad range of spin-dependent nonequilibrium transport properties of hybrid systems composed of a normal region tunnel coupled to two superconductors with exchange fields induced by the proximity to thin ferromagnetic layers and highlight its functionalities. By calculating the quasiparticle distribution functions in the normal region, we find that they are spin dependent and strongly sensitive to the relative angle between exchange fields in the two superconductors. The impact of inelastic collisions on their properties is addressed. As a result, the electric current flowing through the system is found to be strongly dependent on the relative angle between exchange fields, giving rise to a huge value of magnetoresistance. Moreover, the current presents a complete spin polarization in a wide range of bias voltages, even in the quasiequilibrium case. In the nonequilibrium limit, we parametrize the distributions with an �effective� temperature, which turns out to be strongly spin dependent, though quite sensitive to inelastic collisions. By tunnel coupling the normal region to an additional superconducting electrode, we show that it is possible to implement a spin-polarized current source of both spin species, depending on the bias voltages applied.
Diffusion and localization in carbon nanotubes and graphene nanoribbons
Creators: name: Nemec, Norbert
name: Richter, Klaus
name: Cuniberti, Gianaurelio
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik

description: We study transport length scales in carbon nanotubes and graphene ribbons under the influence of Anderson disorder. We present generalized analytical expressions for the density of states, the elastic mean free path and the localization length in arbitrarily structured quantum wires. These allow us to analyze the electrical response over the full energy range, including the regions around van Hove singularies, traditionally difficult to access by alternative approaches. Comparing with the results of numerical simulations, we demonstrate that both the diffusive and the localized regime are well represented by the analytical approximations over a wide range of the energy spectrum. The approach works well for both metallic and semiconducting nanotubes and nanoribbons but breaks down near the edge states of zigzag ribbons.
Beate Braun-Niehr, Der Codex Vaticanus Rossianus 181. Studien zur Erfurter Buchmalerei um 1200
Creators: name: Jakobi-Mirwald, Christine
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Hamiltonian Formulation and Perturbations for Dust Motion around Cometary Nuclei
Creators: name: Jiang, Yu
name: Schmidt, Juergen
name: Baoyin, Hexi
name: Li, Hengnian
name: Li, Junfeng
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In this paper we analyze the dynamical behavior of large dust grains in the vicinity of a cometary nucleus. To this end we consider the gravitational field of the irregularly shaped body, as well as its electric and magnetic fields. Without considering the effect of gas friction and solar radiation, we find that there exist grains which are static relative to the cometary nucleus; the positions of these grains are the stable equibria. There also exist grains in the stable periodic orbits close to the cometary nucleus. The grains in the stable equibria or the stable periodic orbits will not escape or impact on the surface of the cometary nucleus. The results are applicable for large charge dusts with small area-mass ratio which are near the cometary nucleus and far from the Solar. It is found that the resonant periodic orbit can be stable, and there exist stable non-resonant periodic orbits, stable resonant periodic orbits and unstable resonant periodic orbits in the potential field of cometary nuclei. The comet gravity force, solar gravity force, electric froce, magnetic force, solar radiation pressure, as well as the gas drag force are all considered to analyze the order of magnitude of these forces acting on the grains with different parameters. Let the distance of the dust grain relative to the mass centre of the cometary nucleus, the charge and the mass of the dust grain vary, respectively, fix other parameters, we clacluated the strengths of different forces.
description: 36 pages, 8 figures
Die Handschriften des 12. Jahrhunderts der Staatsbibliothek Bamberg
Creators: name: Wittekind, Susanne
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Die illuminierten Handschriften der Württembergischen Landesbibliothek Stuttgart Bd. 3
Creators: name: Maurer, Helmut
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Archiv der Freiherren Kechler von Schwandorf
Creators: name: Maier, Franz Georg
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
The rational homology of spaces of long links
Creators: name: Tsopméné, Paul Arnaud Songhafouo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: We provide a complete understanding of the rational homology of the space of long links of m strands in the euclidean space of dimension d > 3. First, we construct explicitly a cosimplicial chain complex whose totalization is quasi-isomorphic to the singular chain complex of the space of long links. Next we show (using the fact that the Bousfield-Kan spectral sequence associated to this cosimplcial chain complex collapses at the page 2) that the homology Bousfield-Kan spectral sequence associated to the Munson-Volic cosimplicial model for the space of long links collapses at the page 2 rationally, and this solves a conjecture of Munson-Volic. Our method enables us also to determine the rational homology of the high dimensional analogues of spaces of long links. The last result of this paper states that the radius of convergence of the Poincaré series for the space of long links (modulo immersions) tends to zero as m goes to the infinity.
description: 19 pages. Improved the codimension condition and the exposition. Published in AGT
Functional Nonlinear Learning
Creators: name: Wang, Haixu
name: Cao, Jiguo
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Mental Health

description: Using representations of functional data can be more convenient and beneficial in subsequent statistical models than direct observations. These representations, in a lower-dimensional space, extract and compress information from individual curves. The existing representation learning approaches in functional data analysis usually use linear mapping in parallel to those from multivariate analysis, for example, functional principal component analysis (FPCA). However, functions, as infinite-dimensional objects, sometimes have nonlinear structures that cannot be uncovered by linear mapping. Linear methods will be more overwhelmed by multivariate functional data. For that matter, this article proposes a functional nonlinear learning (FunNoL) method to sufficiently represent multivariate functional data in a lower-dimensional feature space. Furthermore, we merge a classification model for enriching the ability of representations in predicting curve labels. Hence, representations from FunNoL can be used for both curve reconstruction and classification. Additionally, we have endowed the proposed model with the ability to address the missing observation problem as well as to further denoise observations. The resulting representations are robust to observations that are locally disturbed by uncontrollable random noises. We apply the proposed FunNoL method to several real datasets and show that FunNoL can achieve better classifications than FPCA, especially in the multivariate functional data setting. Simulation studies have shown that FunNoL provides satisfactory curve classification and reconstruction regardless of data sparsity. Supplementary materials for this article are available online.
Charge-memory effect in a polaron model: equation-of-motion method for Green functions
Creators: name: D'Amico, Pino
name: Ryndyk, Dmitry
name: Cuniberti, Gianaurelio
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik

description: We analyze a single-level quantum system placed between metallic leads and strongly coupled to a localized vibrational mode, which can be thought as a model for a single-molecule junction or an STM setup. We consider a polaron model describing the interaction between electronic and vibronic degrees of freedom and develop and examine different truncation schemes in the equation-of-motion method within the framework of non-equilibrium Green functions. We show that upon gating the structure with an external voltage, it is possible to observe charge-bistability and hysteretic behavior which can be the basis of a charge-memory element. We further perform a systematic analysis of the bistability behaviour of the system for different internal parameters such as the electron-vibron and the lead-molecule coupling strength
Spin-polarized tunneling through randomly transparent magnetic junctions: Reentrant magnetoresistance approaching the Jullière limit
Creators: name: Tkachov, Grygoriy
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik
subject: 72.25.-b
subject: 85.75.-d

description: The electron conductance in planar magnetic tunnel junctions with long-range barrier disorder is studied within Glauber-eikonal approximation enabling exact disorder ensemble averaging by means of the Holtsmark-Markov method. This allows us to address a hitherto unexplored regime of the tunneling magnetoresistance effect characterized by the crossover from k_||-conserving to random tunneling (k_|| is the in-plane wave vector) as a function of the defect concentration. We demonstrate that such a crossover results in a reentrant magnetoresistance: It goes through a pronounced minimum before reaching the disorder- and geometry-independent Julliere value at high defect concentrations.
Quellen zur südwestdeutschen Geschichte in den Archiven der Tschechischen Republik, hg. v. Volker Rödel
Creators: name: Maier, Franz Georg
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17
Quantum Dissipative Rashba Spin Ratchets
Creators: name: Smirnov, Sergey
name: Bercioux, Dario
name: Grifoni, Milena
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik
subject: 05.60.Gg
subject: 03.65.Yz
subject: 72.25.Dc
subject: 73.23.-b

description: We predict the possibility to generate a finite stationary spin current by applying an unbiased ac driving to a quasi-one-dimensional asymmetric periodic structure with Rashba spin-orbit interaction and strong dissipation. We show that under a finite coupling strength between the orbital degrees of freedom the electron dynamics at low temperatures exhibits a pure spin ratchet behavior, i.e. a finite spin current and the absence of charge transport in spatially asymmetric structures. It is also found that the equilibrium spin currents are not destroyed by the presence of strong dissipation.
title: Oxidgeträgerte kleine Platincluster und deren Interaktion mit Wasser
Creators: name: Neuberger, Florian
Publisher: name: UNSPECIFIED
Year: 2023

description: Die effiziente Nutzung von Ressourcen stellt eine der größten Herausforderungen der heutigen Zeit dar. Gerade die chemische Industrie birgt mit ihrem hohen Material- und Energiebedarf ein hohes Optimierungspotential. Katalysatoren und die damit verbundenen Prozesse können diese Bedarfe maßgeblich reduzieren. Während in Bezug auf die katalytischen Eigenschaften von Platin als Festkörper für die Wasserstoffgewinnung fundierte Kenntnisse vorliegen, ist der Sub-Nanometer-Bereich kleiner Platincluster noch weitestgehend unverstanden. Um diese Wissenslücke zu füllen, wurde in der vorliegenden Dissertation ein integriertes Vakuumsystem entwickelt und optimiert, mit welchem monodisperse Platincluster (m < 16.000 amu) auf zuvor in-situ präparierten Oberflächen deponiert und charakterisiert werden können. Die Substrate entsprachen dünnen Oxidschichten auf Silizium und Titan als Modellersatzsysteme für passivierte Photoabsorber, sodass sich Si/SiO₂- und Ti/TiO₂-Schichtsysteme ergaben. Auf diesen verunreinigungsfreien Oxiden wurden Platincluster Pt_n mit n = 1, 2, 6, 8, 9, 10, 13, 19 und 29 mit jeweils ca. 7 % einer Monolage homogen deponiert. Die Analyse der Proben erfolgte anschließend mittels temperatur-programmierter Desorption, Röntgen- und Ultraviolettphotoelektronenspektroskopie, sowie elektrochemischer Charakterisierung in saurer, wässriger Lösung. Es konnte gezeigt werden, dass sich die elektronische Struktur der Schichtsysteme durch die Platindeposition verändert. Gerade im Bereich der Bandlücke der dünnen Oxidschicht werden Zustände des Platins induziert, sodass sich die verbleibende Energielücke bis zur Fermikante von zuvor 3,1 eV für TiO₂ auf 1,3 eV (Pt₁) bis 0,3 eV (Pt₂₉) durch Variation der Clustergröße einstellen lässt. Diese Justierbarkeit konnte im Rahmen der elektrokatalytischen Wasserspaltung genutzt werden, um den optimalen Größenbereich eines Platinnanopartikels für die Wasserstoffbildungsreaktion (HER) zu ermitteln. Es wurde beobachtet, dass im Größenbereich um Pt₁₉ (ca. 1 nm Durchmesser) die höchste massenbezogene Aktivität erhalten wird. Diese liegt um etwa eine Größenordnung über der von deponierten Platinatomen. Werden lediglich die Oberflächenatome berücksichtigt, so ist die Aktivität anhand von Stromdichten aus der Cyclovoltametrie von Pt₁₉ auf TiO₂ 13x höher als die von deponierten Platinatomen und 5x höher als die Referenz einer ausgedehnten Platinoberfläche, wie sie derzeit technisch genutzt werden. Dies ermöglicht ein effizienteres Design von Katalysatorsystemen, auch über die Wasserstoffbildung hinaus.
The effect of fragmented sleep on emotion regulation ability and usage
Creators: name: Boon, Merel Elise
name: van Hooff, M.L.M.
name: Vink, J.M.
name: Geurts, S.A.E.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Mental Health

description: Sleep has a profound effect on our mood, but insight in the mechanisms underlying this association is still lacking. We tested whether emotion regulation is a mediator in the relationship between fragmented sleep and mood disturbance. The effect of fragmented sleep on the emotion regulation strategies, including cognitive reappraisal, distraction, acceptance and suppression ability, was assessed. We further tested whether the use of these strategies, as well as rumination and self-criticism, mediated the association between fragmented sleep and negative and positive affect. Participants (N = 69) wore an actiwatch and filled in a sleep diary for 12 consecutive nights. They had one control night and one sleep fragmentation night. Emotion regulation ability was assessed with an experimental task. Usage of emotion regulation strategies and negative and positive affect were assessed four times during the day with a survey after the control and sleep fragmentation night. Cognitive reappraisal, distraction, acceptance and suppression ability did not differ between the sleep fragmentation and control condition. However, participants reported higher usage of rumination and distraction after the sleep fragmentation night and rumination significantly mediated the negative association between fragmented sleep and negative affect.
Obstructions to the integrability of VB-algebroids
Creators: name: Brahic, Olivier
name: Cabrera, Alejandro
name: Ortiz, Cristian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 18D05, 22A30, 53D17

description: VB-groupoids can be thought of as vector bundle objects in the category of Lie groupoids. Just as Lie algebroids are the infinitesimal counterparts of Lie groupoids, VB-algebroids correspond to the infinitesimal version of VB-groupoids. In this work we address the problem of the existence of a VB-groupoid admitting a given VB-algebroid as its infinitesimal data. Our main result is an explicit characterization of the obstructions appearing in this integrability problem as the vanishing of the spherical periods of certain cohomology classes. Along the way, we illustrate our result in concrete examples. Finally, as a corollary, we obtain computable obstructions for a $2$-term representation up to homotopy of Lie algebroid to arise as the infinitesimal counterpart of a smooth such representation of a Lie groupoid.
description: 26 pages, accepted for publication in the Journal of Symplectic Geometry
Übersicht über die Bestände des Hauptstaatsarchivs Stuttgart: Kabinett, Geheimer Rat, Ministerien
Creators: name: Wolf, Hubert
Publisher: name: Rottenburger Jahrbuch für Kirchengeschichte
Year: 1970

description: Rottenburger Jahrbuch für Kirchengeschichte, Bd. 17 (1998): Rottenburger Jahrbuch für Kirchengeschichte, Band 17