cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Extending the eigCG algorithm to nonsymmetric Lanczos for linear systems with multiple right-hand sides
Creators: name: Abdel-Rehim, A. M.
name: Stathopoulos, Andreas
name: Orginos, Kostas
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The technique that was used to build the EigCG algorithm for sparse symmetric linear systems is extended to the nonsymmetric case using the BiCG algorithm. We show that, similarly to the symmetric case, we can build an algorithm that is capable of computing a few smallest magnitude eigenvalues and their corresponding left and right eigenvectors of a nonsymmetric matrix using only a small window of the BiCG residuals while simultaneously solving a linear system with that matrix. For a system with multiple right-hand sides, we give an algorithm that computes incrementally more eigenvalues while solving the first few systems and then uses the computed eigenvectors to deflate BiCGStab for the remaining systems. Our experiments on various test problems, including Lattice QCD, show the remarkable ability of EigBiCG to compute spectral approximations with accuracy comparable to that of the unrestarted, nonsymmetric Lanczos. Furthermore, our incremental EigBiCG followed by appropriately restarted and deflated BiCGStab provides a competitive method for systems with multiple right-hand sides.
description: 25 pages, 18 figures
Exploring the dimensions used for people evaluation - Study Plan (evaldim1)
Creators: name: Nudler, Yahel
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Social Psychology
subject: Cognitive Psychology
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: Attitudes
subject: Modeling
subject: Self-knowledge
subject: Social Evaluation

description: The purpose of the current experiment is to explore how much and which dimensions/attributes people use to evaluate other people. We are interested in whether people focus on a handful (e.g., 2-5) of attributes for each judgment, or more than a handful (e.g., above 5) use, and whether specific dimensions tend to influence more often and more strongly when evaluating other people. We are also interested in how accurate people are when they are reflecting on the information that influenced their evaluation of other people.
On the maximum rank of Toeplitz block matrices of blocks of a given pattern
Creators: name: Reißig, Gunther
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 05B20, 15A03, 05C50

description: We show that the maximum rank of block lower triangular Toeplitz block matrices equals their term rank if the blocks fulfill a structural condition, i.e., only the locations but not the values of their nonzeros are fixed.
title: Dual Studieren – und dann?
title: Ergebnisse einer bundesweiten Befragung dual Studierender
titleType: AlternativeTitle
Creators: name: Hähn, Katharina
name: Krone, Sirikit
name: Ratermann-Busse, Monique
Publisher: name: DuEPublico: Duisburg-Essen Publications Online, University of Duisburg-Essen, Germany
Year: 2018

description: Auf den Punkt ...
Dual Studierende sind mit einem Anteil von ca. 70% überwiegend in
praxisintegrierende duale Studienangebote eingebunden.
Die Wahl des Studienfaches ist wie bei Regelstudiengängen eindeutig
geschlechtsspezifisch geprägt.
Dreiviertel der dual Studierenden geben an, dass es nach erfolgreichem
Studium eine – unterschiedlich gestaltete – Übernahmevereinbarung
mit ihrem Ausbildungsbetrieb gibt. Von denjenigen, die nach
dem Studienabschluss vorhaben zu wechseln, tut dies nur jede/r Fünfte,
weil der Ausbildungsbetrieb sie nicht übernimmt.
Knapp 40 % der Befragten wollen nach dem Bachelor weiter studieren.
Fast 60% planen, dieses Masterstudium berufsbegleitend durchzuführen.
Die Zufriedenheit mit den betrieblichen Studienbedingungen ist insgesamt
hoch – es zeigen sich allerdings deutliche Unterschiede zwischen
Branchen und Studienfächern.
Dual Studierende werden durch betriebliche Angebote sowie betriebliche
und außerbetriebliche Akteure bei der Vorbereitung ihres Berufseinstiegs
unterstützt. Die Betriebsgröße beeinflusst das Angebotsspektrum
sowie die Relevanz verschiedener Akteure im Prozess.
Crystal structure of distrontium lanthanum gallium pentaoxide, Sr2LaGaO5
Creators: name: Gesing, T.M.
name: Uecker, R.
name: Buhl, Josef-Christian
Publisher: name: Berlin, Boston : De Gruyter
Year: 2000
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
How modulator binding at the amyloidβ-γ-secretase interface enhances substrate binding and attenuates membrane distortion
Creators: name: Zacharias, Martin
name: Chen, Shu-Yu
Publisher: name: Zenodo
Year: 2023

description: Water-stripped trajectories for the research article "How modulator binding at the amyloidβ-γ-secretase interface enhances substrate binding and attenuates membrane distortion" and the amber topologies for GSM E2012 and GSI L685458. The trajectories and topology starting with "ab43_E20_tip3p_stripped" are without forcefield modification on the pi-cation interaction, whereas the ones starting with "ab43_E20_mod_stripped" are with the forcefield modification. 
The atom names of GSM and GSI written in the forcefield are also given in the pdb files with the extension "_name.pdb".
Structures of the snapshots shown in the main text are E20_GSEC_structures.pdb and E20_Ab43_GSEC.pdb
How modulator binding at the amyloidβ-γ-secretase interface enhances substrate binding and attenuates membrane distortion
Creators: name: Zacharias, Martin
name: Chen, Shu-Yu
Publisher: name: Zenodo
Year: 2023

description: Water-stripped trajectories for the research article "How modulator binding at the amyloidβ-γ-secretase interface enhances substrate binding and attenuates membrane distortion" and the amber topologies for GSM E2012 and GSI L685458. The trajectories and topology starting with "ab43_E20_tip3p_stripped" are without forcefield modification on the pi-cation interaction, whereas the ones starting with "ab43_E20_mod_stripped" are with the forcefield modification. 
The atom name of GSM and GSI written in the forcefield are given also in the pdb files with the extension "_name.pdb".
Quench dynamics of a Tonks-Girardeau gas released from a harmonic trap
Creators: name: Collura, Mario
name: Sotiriadis, Spyros
name: Calabrese, Pasquale
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the non-equilibrium dynamics of a gas of impenetrable bosons released from a harmonic trapping potential to a circle. The many body dynamics is solved analytically and the time dependence of all the physically relevant correlations is described. We prove that, for large times and in the thermodynamic limit, the reduced density matrix of any subsystem converges to a generalized Gibbs ensemble as a consequence of the integrability of the model. We discuss the approach to the stationary behavior at late times. We also describe the time-dependence of the entanglement entropy which attains a very simple form in the stationary state.
description: 52 pages, 20 figures
Crystal structure of distrontium praseodym gallium pentaoxide, Sr2PrGaO5
Creators: name: Gesing, T.M.
name: Uecker, R.
name: Buhl, Josef-Christian
Publisher: name: Berlin, Boston : De Gruyter
Year: 1999
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Crystal structure of hexapraseodymium(III) trinitride tetrasulfide chloride, Pr6N3S4Cl
Creators: name: Meyer, M.
name: Schleid, T.
Publisher: name: Berlin, Boston : De Gruyter
Year: 1999
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Effect of noise on generalized synchronization of chaos: theory and experiment
Creators: name: Moskalenko, Olga I.
name: Hramov, Alexander E.
name: Koronovskii, Alexey A.
name: Ovchinnikov, Alexey A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The influence of noise on the generalized synchronization regime in the chaotic systems with dissipative coupling is considered. If attractors of the drive and response systems have an infinitely large basin of attraction, generalized synchronization is shown to possess a great stability with respect to noise. The reasons of the revealed particularity are explained by means of the modified system approach [A.E. Hramov, A.A. Koronovskii, Phys. Rev. E. 71, 067201 (2005)] and confirmed by the results of numerical calculations and experimental studies. The main results are illustrated using the examples of unidirectionally coupled chaotic oscillators and discrete maps as well as spatially extended dynamical systems. Different types of the model noise are analyzed. Possible applications of the revealed particularity are briefly discussed.
description: 23 pages, 13 figures
Many-particle mechanics with D(2, 1; alpha) superconformal symmetry
Creators: name: Krivonos, Sergey
name: Lechtenfeld, Olaf
Publisher: name: New York, NY : Springer International Publishing
Year: 2011
Subjects: subject: Integrable Equations in Physics
subject: Extended Supersymmetry
subject: wdvv equations
subject: root systems
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We overcome the barrier of constructing N - 4 superconformal models in one space dimension for more than three particles. The D(2, 1; alpha) superalgebra of our systems is realized on the coordinates and momenta of the particles, their superpartners and one complex pair of harmonic variables. The models are determined by two prepotentials, F and U, which must obey the WDVV and a Killing-type equation plus homogeneity conditions. We investigate permutation-symmetric solutions, with and without translation invariance. Models based on deformed An and BCDn root systems are constructed for any value of alpha, and exceptional F-n-type and super root systems admit solutions as well. Translation-invariant mechanics occurs for any number of particles at alpha=-1/2 (osp(4/2) invariance as a degenerate limit) and for four particles at arbitrary alpha (three series).
State-dependent potentials in a nanofiber-based two-color trap for cold atoms
Creators: name: Kien, Fam Le
name: Schneeweiss, Philipp
name: Rauschenbeutel, Arno
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the ac Stark shift of a cesium atom interacting with far-off-resonance guided light fields in the nanofiber-based two-color optical dipole trap realized by Vetsch \textit{et al.} [Phys. Rev. Lett. \textbf{104}, 203603, (2010)]. Particular emphasis is given to the fictitious magnetic field produced by the vector polarizability of the atom in conjunction with the ellipticity of the polarization of the trapping fields. Taking into account the ac Stark shift, the atomic hyperfine interaction, and a magnetic interaction, we solve the stationary Schrödinger equation at a fixed point in space and find Zeeman-state-dependent trapping potentials. In analogy to the dynamics in magnetic traps, a local degeneracy of these state-dependent trapping potentials can cause spin flips and should thus be avoided. We show that this is possible using an external magnetic field. Depending on the direction of this external magnetic field, the resulting trapping configuration can still exhibit state-dependent displacement of the potential minima. In this case, we find nonzero Franck-Condon factors between motional states of the potentials for different hyperfine-structure levels and propose the possibility of microwave cooling in a nanofiber-based two-color trap.
Kloster & UmWelt. Ressourcennutzung im Kontext mittelalterlicher Klosterlandschaften
Creators: name: Vossler-Wolf, Christina
Publisher: name: Mitteilungen der Deutschen Gesellschaft für Archäologie des Mittelalters und der Neuzeit
Year: 2016

description: [nicht vorhanden / not available]
description: Mitteilungen der Deutschen Gesellschaft für Archäologie des Mittelalters und der Neuzeit, Bd. 29 (2016): Mitteilungen der DGAMN: Ressourcen
Prospektion oder Gewinnung? Neue Hinweise zu Betriebskonzepten in sächsischen Bergbaurevieren des 12./13. Jahrhunderts
Creators: name: Hemker, Christiane
name: Schröder, Frank
name: Hönig, Heide
Publisher: name: Mitteilungen der Deutschen Gesellschaft für Archäologie des Mittelalters und der Neuzeit
Year: 2016

description: [nicht vorhanden / not available]
description: Mitteilungen der Deutschen Gesellschaft für Archäologie des Mittelalters und der Neuzeit, Bd. 29 (2016): Mitteilungen der DGAMN: Ressourcen
Dual-Based Bounds for Resource Allocation in Zero-forcing Beamforming OFDMA-SDMA Systems
Creators: name: Perea-Vega, Diego
name: Frigon, Jean-Francois
name: Girard, Andre
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We consider multi-antenna base stations using orthogonal frequency division multiple access and space division multiple access techniques to serve single-antenna users. Some users, called real-time users, have minimum rate requirements and must be served in the current time slot while others, called non real-time users, do not have strict timing constraints and are served on a best-effort basis. The resource allocation problem is to find the assignment of users to subcarriers and the transmit beamforming vectors that maximize the total user rates subject to power and minimum rate constraints. In general, this is a nonlinear and non-convex program and the zero-forcing technique used here makes it integer as well, exact optimal solutions cannot be computed in reasonable time for realistic cases. For this reason, we present a technique to compute both upper and lower bounds and show that these are quite close for some realistic cases. First, we formulate the dual problem whose optimum provides an upper bound to all feasible solutions. We then use a simple method to get a primal-feasible point starting from the dual optimal solution, which is a lower bound on the primal optimal solution. Numerical results for several cases show that the two bounds are close so that the dual method can be used to benchmark any heuristic used to solve this problem. As an example, we provide numerical results showing the performance gap of the well-known weight adjustment method and show that there is considerable room for improvement.
description: Accepted for publication in EURASIP Journal on Wireless Communications and Networking. arXiv admin note: substantial text overlap with arXiv:1110.1347
Movie file captions for 4 movies from Towards a mathematical understanding of invasion resistance in multispecies communities
Creators: name: Gjini, Erida
name: Madec, Sten
Publisher: name: The Royal Society
Year: 2023
Subjects: classificationCode: 310399
subject: Ecology not elsewhere classified
classificationCode: 310799
subject: Microbiology not elsewhere classified
classificationCode: 490199
subject: Applied mathematics not elsewhere classified

description: Multispecies community composition and dynamics are key to health and disease across biological systems, a prominent example being microbial ecosystems. Explaining the forces that govern diversity and resilience in the microbial consortia making up our body’s defences remains a challenge. In this, theoretical models are crucial, to bridge the gap between species dynamics and underlying mechanisms and to develop analytic insight. Here we propose a replicator equation framework to model multispecies dynamics where an explicit notion of invasion resistance of a system emerges and can be studied explicitly. For illustration, we derive the conceptual link between such replicator equation and N microbial species’ growth and interaction traits, stemming from micro-scale environmental modification. Within this replicator framework, mean invasion fitness arises, evolves dynamically, and may undergo critical predictable shifts with global environmental changes. This mathematical approach clarifies the key role of this resident system trait for invader success, and highlights interaction principles among N species that optimize their collective resistance to invasion. We propose this model based on the replicator equation as a powerful new avenue to study, test and validate mechanisms of invasion resistance and colonization in multispecies microbial ecosystems and beyond.
Actively switchable non-degenerate polarization entangled photon pair distribution in a dense wave-division multiplexing
Creators: name: Zhou, Zhi-Yuan
name: Jiang, Yun-Kun
name: Ding, Dong-Sheng
name: Shi, Bao-Sen
name: Guo, Guang-Can
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have realized experimentally a non-degenerate polarization-entangled photon pair distribution in a commercial telecom dense wave-division multiplexing device (DWDM) with 8 channels. A promising point of this work is that the entangled photon pair is obtained via spontaneously parametric down conversion in a single type-II periodically poled KTiOPO4 crystal without usual post-selection. Another promising advantage is that we can actively control and switch the distribution of the photon pair between different channel pairs in DWDM at will. There is no crosstalk between the different channel pair because of a limited emission bandwidth of the source. High raw visibility of greater than 90% in Bell-type interference measurement in each channel pair and the CHSH inequality S parameter of 2.63+/-0.08 prove high entanglement of our source. Our work is helpful for building quantum communication networks.
description: Comments welcome
New D( 2, 1; alpha) mechanics with spin variables
Creators: name: Fedoruk, Sergey
name: Ivanov, Evgeny
name: Lechtenfeld, Olaf
Publisher: name: New York, NY : Springer International Publishing
Year: 2010
Subjects: subject: Extended Supersymmetry
subject: Superspaces
subject: Black Holes
subject: supersymmetric quantum-mechanics
subject: black-holes
subject: superconformal mechanics
subject: calogero models
subject: systems
subject: particle
subject: n=4
subject: supergravity
subject: d(2,1,alpha)
subject: superspace
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We elaborate on a novel superconformal mechanics model possessing D(2, 1; alpha) symmetry and involving extra U(2) spin variables. It is the one-particle case of the N=4 superconformal matrix model recently proposed in arXiv:0812.4276 [hep-th], and it generalizes to arbitrary a alpha not equal 0 the OSp(4|2) superconformal mechanics of arXiv:0905.4951 [hep-th]. As in the latter case, the U(2) spin variables are described by a Wess-Zumino action and define the first Hopf map S-3 -> S-2 in the target space. Upon quantization, they represent a fuzzy sphere. We find the classical and quantum generators of the D(2, 1; alpha) superalgebra and their realization on the physical states. The super wave-function encompasses various multiplets of the SU(2)(R) and SU(2)(L) subgroups of D(2, 1; alpha), with fixed isospins. The conformal potential is determined by the external magnetic field in the Wess-Zumino term, whose strength is quantized like in the OSp(4|2) case. As a byproduct, we reveal new invariant subspaces in the enveloping algebra of D(2, 1; alpha) for our quantum realization.
Rainer-Maria Weiss/Anne Klammt (Hrsg.): Mythos Hammaburg. Archäologische Entdeckungen zu den Anfängen Hamburgs. Hamburg 2014
Creators: name: Untermann, Matthias
Publisher: name: Mitteilungen der Deutschen Gesellschaft für Archäologie des Mittelalters und der Neuzeit
Year: 2016

description: Rezension zu: Rainer-Maria Weiss/Anne Klammt (Hrsg.): Mythos Hammaburg. Archäologische Entdeckungen zu den Anfängen Hamburgs (Veröffentlichung des Helms-Museums, Archäologische Museum Hamburg, Stadtmuseum Harburg, 107). Hamburg 2014. 508 Seiten, ISBN 978-3- 931429-27-0.
description: Mitteilungen der Deutschen Gesellschaft für Archäologie des Mittelalters und der Neuzeit, Bd. 29 (2016): Mitteilungen der DGAMN: Ressourcen
Eike Hennig Michl: Castellum, Curia, Palatium ?! Die mittelalterliche Besiedlungsgeschichte eines mainfränkischen Zentralortes auf dem Kapellberg bei Gerolzhofen. Bonn 2015
Creators: name: Spazier, Ines
Publisher: name: Mitteilungen der Deutschen Gesellschaft für Archäologie des Mittelalters und der Neuzeit
Year: 2016

description: Rezension zu: Eike Hennig Michl: Castellum, Curia, Palatium ?! Die mittelalterliche Besiedlungsgeschichte eines mainfränkischen Zentralortes auf dem Kapellberg bei Gerolzhofen (Bamberger Schriften zur Archäologie des Mittelalters und der Neuzeit 5). Bonn 2015. 660 Seiten, 215 Tafeln, Beilage: 1 DVD. ISBN 978-3-7749-3960-8
description: Mitteilungen der Deutschen Gesellschaft für Archäologie des Mittelalters und der Neuzeit, Bd. 29 (2016): Mitteilungen der DGAMN: Ressourcen
Topology of Collisionless Relaxation
Creators: name: Pakter, Renato
name: Levin, Yan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using extensive molecular dynamics simulations we explore the fine-grained phase space structure of systems with long-range interactions. We find that if the initial phase space particle distribution has no holes, the final stationary distribution will also contain a compact simply connected region. The microscopic holes created by the filamentation of the initial distribution function are always restricted to the outer regions of the phase space. In general, for complex multilevel distributions it is very difficult to a priori predict the final stationary state without solving the full dynamical evolution. However, we show that for multilevel initial distributions satisfying a generalized virial condition, it is possible to predict the particle distribution in the final stationary state using Casimir invariants of the Vlasov dynamics.
title: D4SCIENCE-II - Quality Plan
Creators: name: Candela, Leonardo
name: et al
Publisher: name: GreyNet International, Grey Literature Network Service
Year: 2009

description: Quality Assurance is an important task within the scope of any IT project. The implementation of such activity is usually defined through a Quality Plan. The objective of this deliverable is to report the Quality Plan established for the D4Science-II project. This plan covers many activities of the project by gathering procedures concerning different managerial and technological aspects of the project. The ultimate objective of this Quality Plan is to ensure the production of concrete and high- quality results inline with the project plans.
Synchronization in networks of slightly nonidentical elements
Creators: name: Hramov, Alexander E.
name: Khramova, Anastasiya E.
name: Koronovskii, Alexey A.
name: Boccaletti, Stefano
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We study synchronization processes in networks of slightly non identical chaotic systems, for which a complete invariant synchronization manifold does not rigorously exist. We show and quantify how a slightly dispersed distribution in parameters can be properly modelled by a noise term affecting the stability of the synchronous invariant solution emerging for identical systems when the parameter is set at the mean value of the original distribution.
description: 4 pages, 5 figures
title: DRIVER Guidelines 2.0: Guidelines for content providers - Exposing textual resources with OAI-PMH
Creators: name: Vanderfeesten, Maurice
name: et al
Publisher: name: GreyNet International, Grey Literature Network Service
Year: 2008

description: Guidelines for Repository Managers and Administrators on how to expose digital scientific resources using OAI-PMH and Dublin Core Metadata, creating interoperability by homogenising the repository output. For communication in general it is important that person B is able to understand what person A is saying. For this common understanding one needs a common ground, a basic lexicon with an awareness of the meaning of things. From this point on one can start reasoning. In order to support scholarly communication with the use of repositories, repositories should speak the same language and it is therefore essential to create a common ground.

Methodological approach:
In technical terms we create a common ground by conducting "interoperability". Interoperability can be managed at different layers. In the DRIVER Guidelines we basically try to reach interoperability on two layers, syntactical (Use of OAI-PMH & Use of OAI_DC) and semantic (Use of Vocabularies). The creation of the DRIVER Guidelines 2.0 relies on the expertise of many people. All contributors are experts and repository managers. This group has worked together to achieve interoperability in an way that can be implemented practically. The people below therefore endorse and support the DRIVER Guidelines 2.0.
Zur Baugeschichte des historischen Schriesheimer Rathauses
Creators: name: Crowell, Robert
name: Kollia-Crowell, Barbara
Publisher: name: Südwestdeutsche Beiträge zur historischen Bauforschung
Year: 2016

description: [nicht vorhanden / not available]
description: Südwestdeutsche Beiträge zur historischen Bauforschung, Bd. 4 (1999)
Die Bauaufnahme der Kanzel von St. Leonhard in Schwäbisch Gmünd mit einem abbildenden Laserscanner
Creators: name: Homolka, Claudius
Publisher: name: Südwestdeutsche Beiträge zur historischen Bauforschung
Year: 2016

description: [nicht vorhanden / not available]
description: Südwestdeutsche Beiträge zur historischen Bauforschung, Bd. 4 (1999)
Experimental certification of millions of genuinely entangled atoms in a solid
Creators: name: Fröwis, Florian
name: Strassmann, Peter C.
name: Tiranov, Alexey
name: Gut, Corentin
name: Lavoie, Jonathan
name: Brunner, Nicolas
name: Bussières, Félix
name: Afzelius, Mikael
name: Gisin, Nicolas
Publisher: name: London : Nature Publishing Group
Year: 2017
Subjects: subject: certification
subject: human
subject: memory
subject: photon
subject: solid state
subject: witness
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: Quantum theory predicts that entanglement can also persist in macroscopic physical systems, albeit difficulties to demonstrate it experimentally remain. Recently, significant progress has been achieved and genuine entanglement between up to 2900 atoms was reported. Here, we demonstrate 16 million genuinely entangled atoms in a solid-state quantum memory prepared by the heralded absorption of a single photon. We develop an entanglement witness for quantifying the number of genuinely entangled particles based on the collective effect of directed emission combined with the non-classical nature of the emitted light. The method is applicable to a wide range of physical systems and is effective even in situations with significant losses. Our results clarify the role of multipartite entanglement in ensemble-based quantum memories and demonstrate the accessibility to certain classes of multipartite entanglement with limited experimental control. © 2017 The Author(s).
Block Tridiagonal Reduction of Perturbed Normal and Rank Structured Matrices
Creators: name: Bevilacqua, Roberto
name: Del Corso, Gianna M.
name: Gemignani, Luca
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65F15

description: It is well known that if a matrix $A\in\mathbb C^{n\times n}$ solves the matrix equation $f(A,A^H)=0$, where $f(x, y)$ is a linear bivariate polynomial, then $A$ is normal; $A$ and $A^H$ can be simultaneously reduced in a finite number of operations to tridiagonal form by a unitary congruence and, moreover, the spectrum of $A$ is located on a straight line in the complex plane. In this paper we present some generalizations of these properties for almost normal matrices which satisfy certain quadratic matrix equations arising in the study of structured eigenvalue problems for perturbed Hermitian and unitary matrices.
description: 13 pages, 3 figures
Das Schießhaus in Leonberg. Auf Spurensuche in einem zu spät erkannten Baudenkmal
Creators: name: Seidel, Armin
Publisher: name: Südwestdeutsche Beiträge zur historischen Bauforschung
Year: 2016

description: [nicht vorhanden / not available]
description: Südwestdeutsche Beiträge zur historischen Bauforschung, Bd. 4 (1999)
Stochastic Neutrino Mixing Mechanism
Creators: name: Guzzo, M. M.
name: de Holanda, P. C.
name: Peres, O. L. G.
name: Zavanin, E. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a mechanism which provides an explanation of the Gallium and antineutrino reactor anomalies. Differently from original Pontecorvo's hypothesis, this mechanism is based on the phenomenological assumption in which the admixture of neutrino mass eigenstates in the moments of neutrino creation and detection can assume different configurations around the admixture parametrized by the usual values of the mixing angles $θ_{12}$, $θ_{23}$ and $θ_{13}$. For simplicity, we assume a Gaussian distribution for the mixing angles in such a way that the average value of this distribution is given by the usual values of the mixing angles and the width of the Gaussian is denoted by $α$. We show that the proposed mechanism provides a possible explanation for very short-baseline neutrino disappearance, necessary to accommodate Gallium and antineutrino reactor anomalies, which is not allowed in usual neutrino oscillations based on Pontecorvo's original hypotheses. We also can describe high-energy oscillation experiments, like LSND, Fermi and NuTeV, assuming a weakly energy dependent width parameter, $α(E)$, that nicely fits all experimental results.
description: 5 pages, 2 figures
Operation of a titanium nitride superconducting microresonator detector in the nonlinear regime
Creators: name: Swenson, L. J.
name: Day, P. K.
name: Eom, B. H.
name: Leduc, H. G.
name: Llombart, N.
name: McKenney, C. M.
name: Noroozian, O.
name: Zmuidzinas, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: If driven sufficiently strongly, superconducting microresonators exhibit nonlinear behavior including response bifurcation. This behavior can arise from a variety of physical mechanisms including heating effects, grain boundaries or weak links, vortex penetration, or through the intrinsic nonlinearity of the kinetic inductance. Although microresonators used for photon detection are usually driven fairly hard in order to optimize their sensitivity, most experiments to date have not explored detector performance beyond the onset of bifurcation. Here we present measurements of a lumped-element superconducting microresonator designed for use as a far-infrared detector and operated deep into the nonlinear regime. The 1 GHz resonator was fabricated from a 22 nm thick titanium nitride film with a critical temperature of 2 K and a normal-state resistivity of $100\, μΩ\,$cm. We measured the response of the device when illuminated with 6.4 pW optical loading using microwave readout powers that ranged from the low-power, linear regime to 18 dB beyond the onset of bifurcation. Over this entire range, the nonlinear behavior is well described by a nonlinear kinetic inductance. The best noise-equivalent power of $2 \times 10^{-16}$ W/Hz$^{1/2}$ at 10 Hz was measured at the highest readout power, and represents a $\sim$10 fold improvement compared with operating below the onset of bifurcation.
Gut Watthalden in Ettlingen - Zur Baugeschichte einer klassizistischen Villenanlage
Creators: name: Crowell, Robert
name: Kollia-Crowell, Barbara
Publisher: name: Südwestdeutsche Beiträge zur historischen Bauforschung
Year: 2016

description: [nicht vorhanden / not available]
description: Südwestdeutsche Beiträge zur historischen Bauforschung, Bd. 5 (2002)
Licht in der Architektur – Aufklärung und Einstimmung
Creators: name: Hesse, Michael
Publisher: name: Studium Generale
Year: 2016

description: Licht und sein Konterpart, der Schatten, bestimmen wesentlich unsere Wahrnehmung von Gebäuden. In der europäischen Tradition ist ihr Einfluss auf die Architektur bereits seit der Antike berücksichtigt und reflektiert worden. Der Beitrag beleuchtet die architektonische Rolle des Lichts im Wandel der Zeit – bis hin zu seiner Bedeutung als Element der emotionalen Einstimmung.
description: Studium Generale, Licht
Density dependent tunneling in the extended Bose-Hubbard model
Creators: name: Maik, Michal
name: Hauke, Philipp
name: Dutta, Omjyoti
name: Zakrzewski, Jakub
name: Lewenstein, Maciej
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Recently, it has become apparent that, when the interactions between polar molecules in optical lattices becomes strong, the conventional description using the extended Hubbard model has to be modified by additional terms, in particular a density-dependent tunneling term. We investigate here the influence of this term on the ground-state phase diagrams of the two dimensional extended Bose-Hubbard model. Using Quantum Monte Carlo simulations, we investigate the changes of the superfluid, supersolid, and phase-separated parameter regions in the phase diagram of the system. By studying the interplay of the density-dependent hopping with the usual on-site interaction U and nearest-neighbor repulsion V, we show that the ground-state phase diagrams differ significantly from the ones that are expected from the standard extended Bose-Hubbard model. However we find no indication of pair-superfluid behavior in this two dimensional square lattice study in contrast to the one-dimensional case.
Integrity and collaboration in dynamic sensor networks
Creators: name: Schön, Steffen
name: Brenner, Claus
name: Alkhatib, Hamza
name: Coenen, Max
name: Dbouk, Hani
name: Garcia-Fernandez, Nicolas
name: Fischer, Colin
name: Heipke, Christian
name: Lohmann, Katja
name: Neumann, Ingo
name: Nguyen, Uyen
name: Paffenholz, Jens-André
name: Peters, Torben
name: Rottensteiner, Franz
name: Schachtschneider, Julia
name: Sester, Monika
name: Sun, Ligang
name: Vogel, Sören
name: Voges, Raphael
name: Wagner, Bernardo
Publisher: name: Basel : MDPI AG
Year: 2018
Subjects: subject: Camera
subject: Collaboration
subject: GNSS
subject: Integrity
subject: Interval mathematics
subject: Laser scanner
subject: Set theory
subject: Air navigation
subject: Cameras
subject: Fighter aircraft
subject: Laser applications
subject: Laser theory
subject: Navigation
subject: Scanning
subject: Sensor networks
subject: Training aircraft
subject: Underwater acoustics
subject: Global positioning system
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: Global Navigation Satellite Systems (GNSS) deliver absolute position and velocity, as well as time information (P, V, T). However, in urban areas, the GNSS navigation performance is restricted due to signal obstructions and multipath. This is especially true for applications dealing with highly automatic or even autonomous driving. Subsequently, multi-sensor platforms including laser scanners and cameras, as well as map data are used to enhance the navigation performance, namely in accuracy, integrity, continuity and availability. Although well-established procedures for integrity monitoring exist for aircraft navigation, for sensors and fusion algorithms used in automotive navigation, these concepts are still lacking. The research training group i.c.sens, integrity and collaboration in dynamic sensor networks, aims to fill this gap and to contribute to relevant topics. This includes the definition of alternative integrity concepts for space and time based on set theory and interval mathematics, establishing new types of maps that report on the trustworthiness of the represented information, as well as taking advantage of collaboration by improved filters incorporating person and object tracking. In this paper, we describe our approach and summarize the preliminary results.
Das Licht als Metapher in der Philosophie
Creators: name: Kreuzer, Johann
Publisher: name: Studium Generale
Year: 2016

description: Die Metapher des Lichts bezieht sich in der Philosophie zum einen auf die Gegenstände des Erkennens, zum anderen vor allem auch auf das Erkennen selbst. Dieser Beitrag geht auf dieses Bedeutungsspektrum näher ein. Dazu werden wichtige Stationen im Gebrauch der Licht-Metapher in der europäischen Tradition nachgezeichnet – beginnend mit Parmenides und Platon über die christliche Adaptation neuplatonischer Vorgaben bis hin zum Deutschen Idealismus und daran anschließenden Strömungen.
description: Studium Generale, Licht
Towards Research Object Crates 1.2, with ro-crate-java
Creators: name: Pfeil, Andreas
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2023
Subjects: research object crate
data package
validation
profiles
software library

description: Research Object Crate (RO-Crate) is an open, community driven data package specification to describe all kinds of file-based data, as well as entities outside the package. In order to do so, it uses the widespread JSON-format, representing Linked Data (JSON-LD), allowing to link to external information. This makes the format flexible and machine-readable. These packages are being referred to as (RO-)crates. Similar to other formats, RO-Crates is based on files and folders and has a single metadata file to describe the whole package. Therefore, such packages are easy to share between different computer systems and software. In order to create such crates, the RO-Crate community developed libraries written in different programming languages like Python, Ruby, JavaScript, and Java. With Describo, there is also a graphical user interface available. We developed the ro-crate-java library, which allows creating, modifying and validating crates using the Java Programming Language. The focus of development was the ease of use: We aimed to make it intuitive and easy to create valid crates, without knowing the specification too well. Our implementation can be used for integration into repositories or other services or tools. The library was introduced in the HMC conference 2022 poster session. This follow-up poster will give a preview on a draft feature which is available in the RO-Crate 1.2-DRAFT specification and has been requested a lot: the ability to specify the conformance with multiple profiles within one crate. Profiles are “a set of conventions, types and properties that one minimally can require and expect to be present in that subset of RO-Crates” (RO-Spec 1.1). They may be used to validate the crate against institutional constraints or to guarantee required information for further processing or visualization. The new specification includes the possibility to create crates with multiple profiles being specified. As this is an often requested feature, this is now a supported feature since ro-crate-java v1.1.0. The library now makes a difference between stable and unstable features and will update the specification version accordingly. This research has been supported by the Helmholtz Metadata Collaboration (HMC) Platform, the German National Research Data Infrastructure (NFDI) and the German Research Foundation (DFG).
The Resolved Asteroid Program - Size, shape, and pole of (52) Europa
Creators: name: Merline, W. J.
name: Drummond, J. D.
name: Carry, B.
name: Conrad, A.
name: Tamblyn, P. M.
name: Dumas, C.
name: Kaasalainen, M.
name: Erikson, A.
name: Mottola, S.
name: Durech, J.
name: Rousseau, G.
name: Behrend, R.
name: Casalnuovo, G. B.
name: Chinaglia, B.
name: Christou, J. C.
name: Chapman, C. R.
name: Neyman, C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: With the adaptive optics (AO) system on the 10 m Keck-II telescope, we acquired a high quality set of 84 images at 14 epochs of asteroid (52) Europa on 2005 January 20. The epochs covered its rotation period and, by following its changing shape and orientation on the plane of sky, we obtained its triaxial ellipsoid dimensions and spin pole location. An independent determination from images at three epochs obtained in 2007 is in good agreement with these results. By combining these two data sets, along with a single epoch data set obtained in 2003, we have derived a global fit for (52) Europa of diameters (379x330x249) +/- (16x8x10) km, yielding a volume-equivalent spherical-diameter of 315 +/- 7 km, and a rotational pole within 7 deg of [RA; Dec] = [257,+12] in an Equatorial J2000 reference frame (ECJ2000: 255,+35). Using the average of all mass determinations available forEuropa, we derive a density of 1.5 +/- 0.4, typical of C-type asteroids. Comparing our images with the shape model of Michalowski et al. (A&A 416, 2004), derived from optical lightcurves, illustrates excellent agreement, although several edge features visible in the images are not rendered by the model. We therefore derived a complete 3-D description of Europa's shape using the KOALA algorithm by combining our imaging epochs with 4 stellar occultations and 49 lightcurves. We use this 3-D shape model to assess these departures from ellipsoidal shape. Flat facets (possible giant craters) appear to be less distinct on (52) Europa than on other C-types that have been imaged in detail. We show that fewer giant craters, or smaller craters, is consistent with its expected impact history. Overall, asteroid (52) Europa is still well modeled as a smooth triaxial ellipsoid with dimensions constrained by observations obtained over several apparitions.
description: Accepted for publication in Icarus
R-charge conservation and more in factorizable and non-factorizable orbifolds
Creators: name: Bizet, Nana G. Cabo
name: Kobayashi, Tatsuo
name: Pena, Damian K. Mayorga
name: Parameswaran, Susha L.
name: Schmitz, Matthias
name: Zavala, Ivonne
Publisher: name: New York, NY : Springer International Publishing
Year: 2013
Subjects: subject: Superstrings and Heterotic Strings
subject: Conformal Field Models in String Theory
subject: String Field Theory
subject: grand unified theories
subject: yukawa couplings
subject: zn orbifolds
subject: background symmetries
subject: degenerate orbifolds
subject: mini-landscape
subject: z(n) orbifolds
subject: standard model
subject: string models
subject: z(6) orbifold
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We consider the string theory origin of R-charge conservation laws in heterotic orbifold compactifications, deriving the corresponding string coupling selection rule for factorizable and non-factorizable orbifolds, with prime ordered and non-prime ordered point groups. R-charge conservation arises due to symmetries among the worldsheet instantons that can mediate the couplings. Among our results is a previously missed non-trivial contribution to the conserved R-charges from the gamma-phases in non-prime orbifolds, which weakens the R-charge selection rule. Symmetries among the worldsheet instantons can also lead to additional selection rules for some couplings. We make a similar analysis for Rule 4 or the "torus lattice selection rule". Moreover, we identify a new string selection rule, that we call Rule 6 or the "coset vector selection rule".
Earth and rock-filled dam monitoring by high-resolution X-band interferometry: Gongming dam case study
Creators: name: Li, Tao
name: Motagh, Mahdi
name: Wang, Mingzhou
name: Zhang, Wei
name: Gong, Chunlong
name: Xiong, Xunan
name: He, Jinping
name: Chen, Lulu
name: Liu, Jingnan
Publisher: name: Basel : MDPI AG
Year: 2019
Subjects: subject: Correlation
subject: Earth- and rock-fill dam
subject: Hydraulic structural design
subject: InSAR
subject: Spotlight
subject: TerraSAR-X
subject: Correlation methods
subject: Deformation
subject: Interferometry
subject: Satellites
subject: Structural design
subject: Synthetic aperture radar
subject: Earth and rock-fill dam
subject: Meteorological station
subject: Scattering char-acteristics
subject: Settlement analysis
subject: Spaceborne synthetic aperture radars
subject: Dams
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Middle-sized earth- and rock-filled dams with clay cores continue to settle by approximately 0.5-1.5% of their height for approximately 1-3 years after their construction phase. This paper investigates the use of high-resolution spaceborne Synthetic aperture Radar (SAR) interferometry to monitor this settlement process, with the case of the Gongming dam in China. The varieties of slope foreshortening and stretching in the radar coordinates are attributed to the radar's local incidence angle and the dam's slope heading, which are analysed in detail. Focusing on the embankment slope settlement analysis, the equations for calculating foreshortening and the line-of-sight deformation decomposition are derived in detail for the adjustment and data fusing. The scattering characteristics of different materials on the dam surface are analysed, including the grass slope, concrete slope, top road (crest), top wall, step, and ditch. According to the analysis of the precipitation data from a local meteorological station, the coherence losses on the slopes are mainly caused by surface moisture. Both the TerraSAR-X Spotlight (TSX-SL) data and the COSMO-SkyMed Strip Mode (CSK-SM) data are analysed by the stacking method to assess the slopes' deformations. The TSX-SL data results show the highest rate of settlement as 2 cm/yr on the top of the dam slope, consistent with the clay core shrinking process. The CSK-SM data show a similar trend in the lower part of the dam slope but underestimate the deformation in the upper part of the slope.
title: threeSOURCE: A Research and Resource Hub for Alberta's Third Sector
Creators: name: Edmonton Social Planning Council
Publisher: name: GreyNet International, Grey Literature Network Service
Year: 2010

description: Managed by the Edmonton Social Planning Council (ESPC), threeSOURCE (www.threesource.ca) is a digital repository of grey literature on Alberta's non-profit sector, social issues in the province and related topics. During a series of ESPC consultations with social service sector employees in Edmonton, we learned that the sector wanted greater access to research and best practices in their field to help them make informed decisions in their organization and design programs and services that support their clientele. threeSOURCE was designed to address this information need. threeSOURCE is regularly updated by the organization's Resource Coordinator, who reviews and selects current and authoritative research publications on Alberta's non-profit sector, local social issues and related topics and catalogues them in the database. threeSOURCE is supported by the cataloguing program DB/Text Works and the content management system Umbraco. In addition to the social services sector, threeSOURCE is used regularly by universities, health authorities, and municipal, provincial and federal governments to gather research.