cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Density-dependent synthetic magnetism for ultracold atoms in optical lattices
Creators: name: Greschner, Sebastian
name: Huerga, D.
name: Sun, G.
name: Poletti, D.
name: Santos, Luis
Publisher: name: College Park, MD : American Physical Society
Year: 2015
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Raman-assisted hopping can allow for the creation of density-dependent synthetic magnetism for cold neutral gases in optical lattices. We show that the density-dependent fields lead to a nontrivial interplay between density modulations and chirality. This interplay results in a rich physics for atoms in two-leg ladders, characterized by a density-driven Meissner-superfluid to vortex-superfluid transition, and a nontrivial dependence of the density imbalance between the legs. Density-dependent fields also lead to intriguing physics in square lattices. In particular, it leads to a density-driven transition between a nonchiral and a chiral superfluid, both characterized by nontrivial charge density-wave amplitude. We finally show how the physics due to the density-dependent fields may be easily probed in experiments by monitoring the expansion of doublons and holes in a Mott insulator, which presents a remarkable dependence on quantum fluctuations. © 2015 American Physical Society.
Der Peterhof in Freiburg- die achthundertjährige Geschichte eines Bauensembles
Creators: name: Löbbecke, Frank
name: Zumbrink, Stephanie
Publisher: name: Südwestdeutsche Beiträge zur historischen Bauforschung
Year: 2017

description: [nicht vorhanden / not available]
description: Südwestdeutsche Beiträge zur historischen Bauforschung, Bd. 7 (2007)
Antenna subset selection for cyclic prefix assisted MIMO wireless communications over frequency selective channels
Creators: name: Wilzeck, A.
name: Kaiser, T.
Publisher: name: Heidelberg : Springer Verlag
Year: 2008
Subjects: subject: Broadband networks
subject: Channel estimation
subject: Computational complexity
subject: Frequency domain analysis
subject: Multiplexing
subject: Wireless telecommunication systems
subject: Cyclic prefix
subject: Frequency domain equalization (FDE)
subject: Frequency selective channels
subject: MIMO systems
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Antenna (subset) selection techniques are feasible to reduce the hardware complexity of multiple-input multiple-output (MIMO) systems, while keeping the benefits of higher-order MIMO systems. Many studies of antenna selection schemes are based on frequency-flat channel models, which are inconsistent to broadband MIMO systems employing spatial-multiplexing. In broadband MIMO systems aiming to provide high-data-rate links, the employed signal bandwidth is typically larger than the coherence bandwidth of the channel so that the channel will be of frequency selective nature. Within this contribution we provide an overview on joint transmitter- and receiver-side antenna subset selection methods for frequency selective channels and deploy them in MIMO orthogonal frequency division multiplexing (OFDM) systems and MIMO single-carrier (SC) systems employing frequency domain equalization (FDE).
Split strongly abelian p-chief factors and first degree restricted cohomology
Creators: name: Feldvoss, Jörg
name: Siciliano, Salvatore
name: Weigel, Thomas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B05, 17B30, 17B50, 17B55, 17B56

description: In this paper we investigate the relation between the multiplicities of split strongly abelian p-chief factors of finite-dimensional restricted Lie algebras and first degree restricted cohomology. As an application we obtain a characterization of solvable restricted Lie algebras in terms of the multiplicities of split strongly abelian p-chief factors. Moreover, we derive some results in the representation theory of restricted Lie algebras related to the principal block and the projective cover of the trivial irreducible module of a finite-dimensional restricted Lie algebra. In particular, we obtain a characterization of finite-dimensional solvable restricted Lie algebras in terms of the second Loewy layer of the projective cover of the trivial irreducible module. The analogues of these results are well known in the modular representation theory of finite groups.
description: 10 pages. arXiv admin note: substantial text overlap with arXiv:1206.3669
Die Pfarrei in der deutschen städtischen Kirchenlandschaft. Kirchliche, herrschaftliche, bürgerliche Gestaltung
Creators: name: Schmieder, Felicitas
Publisher: name: Vorträge und Forschungen
Year: 2017

description: Vorträge und Forschungen, Bd. 77 (2013): Vorträge und Forschungen: Die Pfarrei im späten Mittelalter
Dorfkirchhöfe in Westfalen im Spätmittelalter: Polyfunktionalität und Gemeindebildung
Creators: name: Freitag, Werner
Publisher: name: Vorträge und Forschungen
Year: 2017

description: Vorträge und Forschungen, Bd. 77 (2013): Vorträge und Forschungen: Die Pfarrei im späten Mittelalter
Ag+, Fe3+ and Zn2+-intercalated cadmium(II)-metal-organic frameworks for enhanced daylight photocatalysis
Creators: name: Surib, Nur Atiqah
name: Sim, Lan Ching
name: Leong, Kah Hon
name: Kuila, Aneek
name: Saravanan, Pichiah
name: Lo, Kong Mun
name: Ibrahim, Shaliza
name: Bahnemann, Detlef W.
name: Jang, Min
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2017
Subjects: subject: Catalysis
subject: Crystalline materials
subject: Intercalation
subject: Ion exchange
subject: Optical properties
subject: Organometallics
subject: Photocatalysis
subject: Photocatalysts
subject: Hydrothermal routes
subject: Ion-exchange techniques
subject: Metal organic framework
subject: Multi dimensional
subject: Photocatalytic efficiency
subject: Reactive oxygen species
subject: Ultra-violet light
subject: Visible region
subject: Zinc
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Design and synthesis of multi-dimensional metal-organic frameworks are fascinating because MOFs possess intriguing structures and unique properties and exhibit potential applications in photocatalysis. In the present study, we endeavoured to synthesize a new Cd-linked MOF through a simple hydrothermal route. The daylight utilising attributes of the Cd-MOF were enhanced by intercalating Ag+, Fe3+, and Zn2+ into the framework via an ion-exchange technique. The optical property shows that Fe3+ stimulates the photo response in the visible region, whereas Ag+ and Zn2+ stimulate the photo response in the ultraviolet light region. Photocatalytic efficiency of the developed MOFs was investigated by degradation of 2-CP under daylight illumination. The Cd-MOFs intercalated with Fe3+ exhibit excellent photocatalysis as compared to the rest, degrading 93% of 2-CP in 5 h of illumination. The intercalation of Fe3+ onto the Cd-MOF significantly reduced the energy gap of the pure MOF; this led to an increased formation of reactive oxygen species driven by the electrons (e-) and holes (h+). Thus, the developed modified MOF clearly demonstrated its capability as a daylight photocatalyst as compared to the existing conventional photocatalysts.
Continuum tensor network field states, path integral representations and spatial symmetries
Creators: name: Jennings, David
name: Brockt, Christoph
name: Haegeman, Jutho
name: Osborne, Tobias J.
name: Verstraete, Frank
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2015
Subjects: subject: many-body physics
subject: quantum fields
subject: quantum information theory
subject: matrix renormalization-group
subject: product states
subject: feynman
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: A natural way to generalize tensor network variational classes to quantum field systems is via a continuous tensor contraction. This approach is first illustrated for the class of quantum field states known as continuous matrix-product states (cMPS). As a simple example of the path-integral representation we show that the state of a dynamically evolving quantum field admits a natural representation as a cMPS. A completeness argument is also provided that shows that all states in Fock space admit a cMPS representation when the number of variational parameters tends to infinity. Beyond this, we obtain a well-behaved field limit of projected entangled-pair states (PEPS) in two dimensions that provide an abstract class of quantum field states with natural symmetries. We demonstrate how symmetries of the physical field state are encoded within the dynamics of an auxiliary field system of one dimension less. In particular, the imposition of Euclidean symmetries on the physical system requires that the auxiliary system involved in the class' definition must be Lorentz-invariant. The physical field states automatically inherit entropy area laws from the PEPS class, and are fully described by the dissipative dynamics of a lower dimensional virtual field system. Our results lie at the intersection many-body physics, quantum field theory and quantum information theory, and facilitate future exchanges of ideas and insights between these disciplines.
Spin nematic states in antiferromagnets containing ferromagnetic bonds
Creators: name: Sizanov, Alexey
name: Syromyatnikov, Arseny
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The majority of recent works devoted to spin nematic phases deal with either frustrated magnets or with those described by Hamiltonians with large non-Heisenberg terms. We show in the present study that nonfrustrated antiferromagnets (AFs) containing ferromagnetic (FM) bonds can show nematic phases in a strong magnetic field. Among the particular spin systems discussed are a ladder with FM rungs, two AF layers coupled ferromagnetically, a chain containing alternating AF and FM bonds, and an AF anisotropic spin-1 chain.
description: 5 pages, 3 figures
[Er14(C2)2(N)2]I24 - ein Iodid mit einem oligomeren, heterointerstitiellen Cluster
Creators: name: Steffen, Frank
name: Meyer, Gerd
Publisher: name: Berlin : De Gruyter
Year: 1995
Subjects: subject: Cluster
subject: Crystal Structure
subject: Erbium Iodide Dicarbide Nitride
subject: Halides
subject: Rare Earth Elements
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [Er14(C2)2(N)2]l24 (triclinic, P1̅, a = 966.3(4) pm. b = 1027.6(2) pm. c = 1663.4(4) pm, α = 101.374(9)°, β = 92.853(14)°, γ = 112.83(2)°, Z = 2) is obtained as red-brown single crystals through a conproportionation reaction of Erl3 and erbium in the presence of carbon and NaN3 in a sealed niobium container. It contains discrete, tetrameric [Er14(C2)2(N)2] clusters that are built from two octahedra and two tetrahedra connected via common edges. The octahedral voids are filled with C2 units and the tetrahedral voids with N atoms. Each discrete [Er14(C2)2(N)2] cluster is surrounded by 32 iodide ligands which connect six clusters via i-a and a-a bridges.
Black holes in an expanding universe from fake supergravity
Creators: name: Chimento, Samuele
name: Klemm, Dietmar
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In arXiv:0902.4814, a general recipe to construct fake supersymmetric solutions to fake N=2, d=4 gauged supergravity coupled to abelian vector multiplets was presented. We use these results to find new multi-centered black hole solutions in an asymptotically FLRW universe. These satisfy the weak energy condition and are maximally charged under two U(1) gauge fields coupled to a scalar, which drives the cosmic expansion while rolling down its potential. As a special subcase, our black holes include the ones constructed previously by Gibbons and Maeda in arXiv:0912.2809. The latter contain two non-negative real numbers n_S, n_T obeying the constraint n_S+n_T=4, with the cases n_T=4 and n_T=1 corresponding to the Kastor-Traschen and the Maeda-Ohta-Uzawa solution respectively. We show that n_S, n_T arise directly as exponents in the prepotential of the fake supergravity theory, and that the above constraint stems from the fact that the prepotential must be a homogeneous function of degree two. Finally, some physical properties of the black holes, like asymptotic behaviour, curvature singularities and trapping horizons, are also discussed. Similar to other solutions that appeared previously in the literature, there is a symmetry enhancement near the event horizon, which becomes therefore a Killing horizon, in spite of the highly dynamical nature of the original spacetime. The temperature associated to this Killing horizon turns out to be nonvanishing.
description: 24 pages, 1 figure, uses jheppub.sty
Nonequilibrium transport of helical Luttinger liquids through a quantum dot
Creators: name: Chao, Sung-Po
name: Silotri, Salman A.
name: Chung, Chung-Hou
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study a steady state non-equilibrium transport between two interacting helical edge states of a two dimensional topological insulator, described by helical Luttinger liquids, through a quantum dot. For non-interacting dot the current is obtained analytically by including the self-energy correction to the dot Green's function. For interacting dot we use equation of motion method to study the influence of weak on-site Coulomb interaction on the transport. We find the metal-to-insulator quantum phase transition for attractive or repulsive interactions in the leads when the magnitude of the interaction strength characterized by a charge sector Luttinger parameter $K$ goes beyond a critical value. The critical Luttinger parameter $K_{cr}$ depends on the hoping strength between dot and the leads as well as the energy level of the dot with respect to the Fermi levels of the leads, ranging from weak interaction regime for dot level off resonance to strong interaction regime for dot in resonance with the equilibrium Fermi level. Nearby the transition various singular behaviors of current noise, dot density of state, and the decoherence rate (inverse of lifetime) of the dot are briefly discussed.
description: 12 pages, 9 sets of figures; v.2 fig.5 corrected and reference added
Homogeneous Connectivity of Potential Energy Network in a Solidlike State of Water Cluster
Creators: name: Akimoto, Takuma
name: Kaneko, Toshihiro
name: Yasuoka, Kenji
name: Zeng, Xiao Cheng
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: A novel route to the exponential trapping-time distribution within a solidlike state in water clusters is described. We propose a simple homogeneous network (SHN) model to investigate dynamics on the potential energy networks of water clusters. In this model, it is shown that the trapping-time distribution in a solidlike state follows the exponential distribution, whereas the trapping-time distribution in local potential minima within the solidlike state is not exponential. To confirm the exponential trapping-time distribution in a solidlike state, we investigate water clusters, $($H${}_2$O$)_6$ and $($H${}_2$O$)_{12}$, by molecular dynamics simulations. These clusters change dynamically from solidlike to liquidlike state and vice versa. We find that the probability density functions of trapping times in a solidlike state are described by the exponential distribution whereas those of interevent times of large fluctuations in potential energy within the solidlike state follow the Weibull distributions. The results provide a clear evidence that transition dynamics between solidlike and liquidlike states in water clusters are well described by the SHN model, suggesting that the exponential trapping-time distribution within a solidlike state originates from the homogeneous connectivity in the potential energy network.
description: 9 pages, 8 figures
title: A Proposed Approach to ISO Compliance and Validation for Metrology Laboratories
Creators: name: Bagley, J. Lyle
Publisher: name: Old Dominion University Libraries
Year: 1997

description: International competition among metrology laboratories, as well as their customers, has intensified the incentive to seek either accreditation to ISO Guide 25 or ISO 9000 quality system registration for the laboratory. The debate continues as to which is more beneficial to the laboratory and its customers once the decision is made to pursue one or the other. This study addresses the advantages and limitations of each, and how best to prepare for complying with ISO standards. The literature was reviewed and ISO certification experts were questioned about these issues. The results were combined with new applications of existing operations research techniques to develop a strategy for metrology laboratories in their quest for ISO compliance and validation.
Bounded dynamics of finite PT-symmetric magnetoinductive arrays
Creators: name: Molina, M. I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We examine the conditions for the existence of bounded dynamical phases for finite PT-symmetric arrays of split-ring resonators. The dimer (N=2), trimer (N=3) and pentamer (N=5) cases are solved in closed form, while for $N>5$ results were computed numerically for several gain/loss spatial distributions. It is found that the parameter stability window decreases monotonically with the size of the array.
description: Four double-column pages, six figures, submitted for publication
Zonal flow generation and its feedback on turbulence production in drift wave turbulence
Creators: name: Pushkarev, Andrey V.
name: Bos, Wouter J. T.
name: Nazarenko, Sergey V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Plasma turbulence described by the Hasegawa-Wakatani equations has been simulated numerically for different models and values of the adiabaticity parameter C. It is found that for low values of C turbulence remains isotropic, zonal flows are not generated and there is no suppression of the meridional drift waves and of the particle transport. For high values of C, turbulence evolves toward highly anisotropic states with a dominant contribution of the zonal sector to the kinetic energy. This anisotropic flow leads to a decrease of a turbulence production in the meridional sector and limits the particle transport across the mean isopycnal surfaces. This behavior allows to consider the Hasegawa-Wakatani equations a minimal PDE model which contains the drift-wave/zonal-flow feedback loop prototypical of the LH transition in plasma devices.
description: 14 pages, 7 figures
Die Pfarrei im späten Mittelalter – Versuch einer Zusammenfassung
Creators: name: Bünz, Enno
Publisher: name: Vorträge und Forschungen
Year: 2017

description: Vorträge und Forschungen, Bd. 77 (2013): Vorträge und Forschungen: Die Pfarrei im späten Mittelalter
Das lombardische Lehnrecht der Libri Feudorum im europäischen Kontext. Entstehung - zentrale Probleme - Wirkungen
Creators: name: Dilcher, Gerhard
Publisher: name: Vorträge und Forschungen
Year: 2017

description: Vorträge und Forschungen, Bd. 76 (2013): Vorträge und Forschungen: Ausbildung und Verbreitung des Lehnwesens im Reich und in Italien im 12. und 13. Jahrhundert
Woher kommt das Lehnrecht des Sachsenspiegels? Überlegungen zu Genesis, Charakter und Struktur
Creators: name: Lück, Heiner
Publisher: name: Vorträge und Forschungen
Year: 2017

description: Vorträge und Forschungen, Bd. 76 (2013): Vorträge und Forschungen: Ausbildung und Verbreitung des Lehnwesens im Reich und in Italien im 12. und 13. Jahrhundert
Das Lehnswesen im Spiegel historiographischer Quellen des 12. und 13. Jahrhunderts
Creators: name: Patzold, Steffen
Publisher: name: Vorträge und Forschungen
Year: 2017

description: Vorträge und Forschungen, Bd. 76 (2013): Vorträge und Forschungen: Ausbildung und Verbreitung des Lehnwesens im Reich und in Italien im 12. und 13. Jahrhundert
Crystal structure of dense pseudo-cubic boron allotrope, pc-B52, by powder X-ray diffraction
Creators: name: Kurakevych, Oleksandr O.
name: Solozhenko, Vladimir L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: During past years, a number of reports have been published on synthesis of tetragonal allotrope of boron, t-B52 phase. However, no unambiguous characterization of the crystal structure has been performed to the present time, while remarkable variation of the a/c lattice-parameter ratio raises strong doubts about its uniqueness. Here the Rietveld refinement of the crystal structure of the high pressure - high temperature boron phase synthesized by a direct solid-state transformation of rhombohedral beta-B106 at 20 GPa and 2500 K has been reported for the first time. Although this boron allotrope belongs to the t-B52 type, its structure can be considered as pseudo-cubic with the a/c ratio of sqr(2).
The 21cm Power Spectrum and the Shapes of Non-Gaussianity
Creators: name: Chongchitnan, Sirichai
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We consider how measurements of the 21cm radiation from the epoch of reionization (z=8-12) can constrain the amplitudes of various `shapes' of primordial non-Gaussianity. The limits on these shapes, each parametrized by the non-linear parameter, f_NL, can reveal whether the physics of inflation is more complex than the standard single-field, slow-roll scenario. In this work, we quantify the effects of the well-known local, equilateral, orthogonal and folded types of non-Gaussianities on the 21cm power spectrum, which is expected to be measured by upcoming radio arrays such as the Square-Kilometre Array (SKA). We also assess the prospects of the SKA in constraining these non-Gaussianities, and found constraints that are comparable with those expected from cosmic-microwave-background experiments such as Planck. We show that the limits on various f_NL can be tightened to O(1) using a radio array with a futuristic but realistic set of specifications.
description: 16 pages. Accepted for publication in JCAP
Comment on "Two-Dimensional Optical Control of Electron Spin Orientation by Linearly Polarized Light in InGaAs"
Creators: name: Oestreich, Michael
name: Hübner, Jens
Publisher: name: College Park, MD : American Physical Society
Year: 2016
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [No abstract available]
Pedicularis gyroflexa Vill.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P.gyroflexa Vill. Cat. 276. In Distr. 3 (Gebiet des Gr. St. Bernhard) Von den im Cat. aufgeführten Fundorten liegen drei: Belle Combe, Fourtzons und Ardifagoz, auf italienischem Gebiet. Die schweizerischen Stellen sind: La Lechere und unter den Lacs de Ferret (Val Ferret) und Grand Le (Entremont); zu diesen kommen heute noch die folgenden: Val Ferret: Montagne de la Fouly (Frau A. v. Mülinen um 1929); zwischen Les Ars-dessous und Les Ars-dessus (Becherer und Thommen 1938); über La Chaux (J.); Bandarray, 2115 m (IVtaillefer 1950); Entremont: Pointe du Revedin zwischen dem Val Ferret und der Combe de La (R. Chodat).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
On the Possibility of Superfast Charge Transfer in DNA
Creators: name: Lakhno, V. D.
name: Sultanov, V. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Numerous experiments on charge transfer in DNA yield a contradictory picture of the transfer: on the one hand they suggest that it is a very slow process and the charge is almost completely localized on one Watson-Crick pair, but on the other hand they demonstrate that the charge can travel a very large distance. To explain this contradiction we propose that superfast charge transitions are possible between base pairs on individual DNA fragments resulting in the establishment of a quasi-equilibrium charge distribution during the time less than that of charge solvation. In other words, we hypothesize these states irrespective of the nature of a mechanism responsible for their establishment, whether it be a hopping mechanism, or a band mechanism, or superexchange, or polaron transport, etc., leaving aside the debates of which one is more advantageous. We discuss qualitative differences between the charge transfer in a dry DNA and that in a solution. In a solution, of great importance is the charge solvation which decreases the transfer rate $10^7 - 10^8$ times as compared with a dry DNA. We consider the conditions under which the superfast charge transfer in a DNA leading to quasi-equilibrium distributions of polarons in a duplex is possible. Comparison of calculated quasi-equilibrium distributions with the experiment testifies to the possibility of superfast tunnel transitions of a hole in a DNA duplex in a solution.
description: 6 pages, 2 figures. Published in peer-reviewed open access journal. http://www.matbio.org/article.php?journ_id=7&id=17&lang=eng
Vorwort
Creators: name: Spieß, Karl-Heinz
Publisher: name: Vorträge und Forschungen
Year: 2015

description: Vorträge und Forschungen, Bd. 76 (2013): Vorträge und Forschungen: Ausbildung und Verbreitung des Lehnwesens im Reich und in Italien im 12. und 13. Jahrhundert
On the critical phenomena and thermodynamics of charged topological dilaton AdS black holes
Creators: name: Zhao, Ren
name: Zhao, Hui-Hua
name: Ma, Meng-Sen
name: Zhang, Li-Chun
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we study the phase structure and equilibrium state space geometry of charged topological dilaton black holes in $(n+1)$-dimensional anti-de Sitter spacetime. By considering the pairs of parameters $(P\sim V)$ and $(Q\sim U)$ as variables, we analyze the phase structure and critical phenomena of black holes and discuss the relation between the two kinds of critical phenomena. We find that the phase structures and critical phenomena drastically depend on the cosmological constant $l$ (or the static electric charge $Q$ of the black holes), dimensionality $n$ and dilaton field $Φ$.
description: 18 pages, 7 figures. arXiv admin note: text overlap with arXiv:1209.1707, arXiv:1205.0559, arXiv:1208.6251 by other authors
Birefringence measurements on crystalline silicon
Creators: name: Krüger, Christoph
name: Heinert, Daniel
name: Khalaidovski, Alexander
name: Steinlechner, Jessica
name: Nawrodt, Ronny
name: Schnabel, Roman
name: Lück, Harald
Publisher: name: London : Institute of Physics Publishing
Year: 2015
Subjects: subject: birefringence
subject: crystalline silicon
subject: Einstein telescope
subject: gravitational wave detection
subject: Gravitationswelle
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Crystalline silicon has been proposed as a new test mass material in third generation gravitational wave detectors such as the Einstein telescope (ET). Birefringence can reduce the interferometric contrast and can produce dynamical disturbances in interferometers. In this work we use the method of polarization-dependent resonance-frequency analysis of Fabry-Perot-cavities containing silicon as a birefringent medium. Our measurements show a birefringence of silicon along the (111) axis of the order of Δ n ≈ 10-7 at a laser wavelength of 1550 nm and room temperature. A model is presented that explains the results of different settings of our measurements as a superposition of elastic strains caused by external stresses in the sample and plastic strains possibly generated during the production process. An application of our theory on the proposed ET test mass geometry suggests no critical effect on birefringence due to elastic strains.
Weighted random staircase tableaux
Creators: name: Hitczenko, Pawel
name: Janson, Svante
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60C05, 05A15, 05E99, 60F05

description: This paper concerns a relatively new combinatorial structure called staircase tableaux. They were introduced in the context of the asymmetric exclusion process and Askey--Wilson polynomials, however, their purely combinatorial properties have gained considerable interest in the past few years. In this paper we further study combinatorial properties of staircase tableaux. We consider a general model of staircase tableaux in which symbols that appear in staircase tableaux may have arbitrary positive weights. Under this general model we derive a number of results. Some of our results concern the limiting laws for the number of appearances of symbols in a random staircase tableaux. They generalize and subsume earlier results that were obtained for specific values of the weights. One advantage of our generality is that we may let the weights approach extreme values of zero or infinity which covers further special cases appearing earlier in the literature. Furthermore, our generality allows us to analyze the structure of random staircase tableaux and we obtain several results in this direction. One of the tools we use are generating functions of the parameters of interests. This leads us to a two--parameter family of polynomials and we study this family as well. Specific values of the parameters include number of special cases analyzed earlier in the literature. All of them are generalizations of the classical Eulerian polynomials. We also briefly discuss the relation of staircase tableaux to the asymmetric exclusion process, to other recently introduced types of tableaux, and to an urn model studied by a number of researchers, including Philippe Flajolet.
description: 36 pages
Inhalt
Creators: name: Redaktion, Die
Publisher: name: Würzburger Jahrbücher für die Altertumswissenschaft
Year: 2017

description: Würzburger Jahrbücher für die Altertumswissenschaft, [N.F.] Bd. 35 (2011): Würzburger Jahrbücher für die Altertumswissenschaft
General self-tuning solutions and no-go theorem
Creators: name: Forste, Stefan
name: Kim, Jihn E.
name: Lee, Hyun Min
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider brane world models with one extra dimension. In the bulk there is in addition to gravity a three form gauge potential or equivalently a scalar (by generalisation of electric magnetic duality). We find classical solutions for which the 4d effective cosmological constant is adjusted by choice of integration constants. No go theorems for such self-tuning mechanism are circumvented by unorthodox Lagrangians for the three form respectively the scalar. It is argued that the corresponding effective 4d theory always includes tachyonic Kaluza-Klein excitations or ghosts. Known no go theorems are extended to a general class of models with unorthodox Lagrangians.
description: 16 pages, no figures, references added
Privates und öffentliches Horoskop
Creators: name: Hübner, Wolfgang
Publisher: name: Würzburger Jahrbücher für die Altertumswissenschaft
Year: 2017

description: [Nicht vorhanden / Not available]
description: Würzburger Jahrbücher für die Altertumswissenschaft, [N.F.] Bd. 35 (2011): Würzburger Jahrbücher für die Altertumswissenschaft
title: Domain Limitations and Interface Requirements for Expert Developed Knowledge Based Systems
Creators: name: Lewis, Bernard Lee
Publisher: name: Old Dominion University Libraries
Year: 1991

description: The expanded use of graphical, case-based and object oriented techniques in expert systems creation has made it more practical for domain experts to develop their own applications. This thesis focuses on the elements necessary in an expert/developer interface and looks at various forms and techniques that exemplify such an approach. The spreadsheet metaphor is used for an interface or managed set of interfaces that a domain expert can use in building his own expert system or prototype. criteria are established for such interfaces and recent commercial offerings that make expert-created knowledge-bases more practical are reviewed for techniques that qualify. Approaches for expanding narrowly defined applications into a complete system are investigated.
Conceptual design of operation strategies for hybrid electric aircraft
Creators: name: Hoelzen, Julian
name: Liu, Yaolong
name: Bensmann, Boris
name: Winnefeld, Christopher
name: Elham, Ali
name: Friedrichs, Jens
name: Hanke-Rauschenbach, Richard
Publisher: name: Basel : MDPI AG
Year: 2018
Subjects: subject: Battery strategy
subject: Hybrid electric aircraft
subject: Overall aircraft design
subject: Propulsion design
subject: Regional aircraft
subject: Wingtip propellers
subject: Carbon dioxide
subject: Carbon footprint
subject: Conceptual design
subject: Electric batteries
subject: Electric power system interconnection
subject: Emission control
subject: Gas turbines
subject: Propulsion
subject: Aircraft design
subject: Battery powered electric motor
subject: Electric aircrafts
subject: Operation strategy
subject: Propulsion system
subject: Sensitivity studies
subject: Simulation approach
subject: Aircraft propellers
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: Ambitious targets to reduce emissions caused by aviation in the light of an expected ongoing rise of the air transport demand in the future drive the research of propulsion systems with lower CO2 emissions. Regional hybrid electric aircraft (HEA) powered by conventional gas turbines and battery powered electric motors are investigated to test hybrid propulsion operation strategies. Especially the role of the battery within environmentally friendly concepts with significantly reduced carbon footprint is analyzed. Thus, a new simulation approach for HEA is introduced. The main findings underline the importance of choosing the right power-to-energy-ratio of a battery according to the flight mission. The gravimetric energy and power density of the electric storages determine the technologically feasibility of hybrid concepts. Cost competitive HEA configurations are found, but do not promise the targeted CO2 emission savings, when the well-to-wheel system is regarded with its actual costs. Sensitivity studies are used to determine external levers that favor the profitability of HEA. © 2018 by the authors.
A simulation of weak-light phase-locking for space laser interferometer
Creators: name: Li, Y.Q.
name: Dong, Y.H.
name: Liu, H.S.
name: Luo, Z.R.
name: Jin, G.
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2017
Subjects: subject: Interferometers
subject: Laser interferometry
subject: Laser mode locking
subject: Locks (fasteners)
subject: Clock-jitter
subject: Experimental test
subject: Laser frequency
subject: Noise floor
subject: Readout noise
subject: Simulation program
subject: Space lasers
subject: Technical noise
subject: Mode-locked fiber lasers
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: A simulation was investigated to better understand the impacts and effects of the additional technical noises on weak-light phase-locking for space laser interferometer. The result showed that the locking precision was limited by the phase readout noise when the laser frequency noise and clock jitter noise were removed, and this result was then confirmed by a benchtop experimental test. The required space laser interferometer noise floor was recovered from the simulation which proved the validity of the simulation program. © Published under licence by IOP Publishing Ltd.
A Possible Formation Scenario for Dwarf Spheroidal Galaxies I: Fiducial Model
Creators: name: Assmann, Paulina
name: Fellhauer, Michael
name: Wilkinson, Mark I.
name: Smith, Rory
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use numerical simulations to study a formation scenario for dwarf spheroidal galaxies in which their stellar populations are the products of the dissolution of open star clusters and stellar associations within cosmological dark matter haloes. This paper shows that this process gives rise to objects which resemble the observed dwarf spheroidal satellites of the Milky Way without invoking external influences. The presence of long-lived kinematic substructures within the stellar components of these objects affects their projected velocity dispersions. We find that this in turn affects mass estimates based on the projected velocity dispersion profiles which may over-estimate the actual dark matter halo mass depending on the amount of substructure which is present. Our models make predictions about the detailed kinematic and photometric properties of the dSphs which can be tested using future observations.
description: 12 pages, 7 figures, accepted for publication in Monthly Notices of the Royal Astronomical Society
Two-dimensional 5d multiferroic W3Cl8: breathing Kagome lattice and tunable magneto-optical Kerr effect
Creators: name: Hu, Di
name: Ye, Haoshen
name: Ding, Ning
name: Xu, Kaidi
name: Wang, Shan-Shan
name: Dong, Shuai
name: Yao, Xiaoyan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Owing to the strong spin-orbit coupling and the related fascinating physical properties, heavy 5d transition-metals exhibit desirable application prospects. However, up to now, the 5d magnetic materials are still very limited, especially very rare for tungsten. In this work, we theoretically predict a two-dimensional multiferroic W3Cl8 monolayer. Intrinsic 5d magnetism of tungsten is activated by the W ions' fractional valence in a breathing Kagome lattice of reduced effective dimension. A coplanar Y-type antiferromagnetism composed by ferromagnetic W3 trimers is confirmed as the magnetic ground state. The spontaneous ferroelectric polarization mainly originates from the ion displacement induced by the breathing distortion of Kagome lattice. An intrinsic magneto-optical Kerr effect with sizable Kerr angle can be observed to detect this trimeric Y-type antiferromagnetism, and it depends strongly on the detailed magnetic order. Thereby, we propose a general scheme for realizing more 5d magnetism in two-dimensional multiferroic systems.
Detection of motional ground state population of a trapped ion using delayed pulses
Creators: name: Gebert, Florian
name: Wan, Yong
name: Wolf, F.
name: Heip, J.C.
name: Schmidt, Piet O.
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2016
Subjects: subject: adiabatic state manipulation
subject: motional state population
subject: STIRAP
subject: trapped ions
subject: Atom lasers
subject: Excited states
subject: Ground state
subject: Ions
subject: Probability distributions
subject: Quantum computers
subject: Quantum theory
subject: Adiabatic state
subject: Hyperfine ground state
subject: Natural linewidths
subject: Population transfer
subject: Precision spectroscopy
subject: State population
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Efficient preparation and detection of the motional state of trapped ions is important in many experiments ranging from quantum computation to precision spectroscopy. We investigate the stimulated Raman adiabatic passage (STIRAP) technique for the manipulation of motional states in a trapped ion system. The presented technique uses a Raman coupling between two hyperfine ground states in 25Mg+, implemented with delayed pulses, which removes a single phonon independent of the initial motional state. We show that for a thermal probability distribution of motional states the STIRAP population transfer is more efficient than a stimulated Raman Rabi pulse on a motional sideband. In contrast to previous implementations, a large detuning of more than 200 times the natural linewidth of the transition is used. This approach renders STIRAP suitable for atoms in which resonant laser fields would populate nearby fluorescing excited states and thus impede the STIRAP process. We use the technique to measure the wavefunction overlap of excited motional states with the motional ground state. This is an important application for force sensing applications using trapped ions, such as photon recoil spectroscopy, in which the signal is proportional to the depletion of motional ground state population. Furthermore, a determination of the ground state population enables a simple measurement of the ion's temperature.
Orchis incarnata Jacq.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P. rostrato-spicata Crantz (P. incarnata Jacq.) Cat. 276. Sicher nur in Distr. 3. Hier im Gebiet des Gr. St. Bernhard sowie bei Zermatt. Die Angabe aus dem Val de Bagnes ist unsicher. Heute bekannte Verbreitung im Gebiet des Gr. St. Bernhard: Valsorey (Guyot; genauer Fundort?); Grenzgipfel Pointe de Drone und Col de Menouve (Melly); ob es sich hier um Vorkommnisse auf der schweizerischen oder auf der italienischen Seite des Passes handelt, kann nicht gesagt werden. Die Angabe des Cat.: «La Baux» bezieht sich auf Italien (Montagna Baus). Das Vorkommen der Art auf der Schweizer Seite des Gr. St. Bernhard ist somit nicht gesichert. - Zermatt: «Abhänge des Gornergrates» (Ch. Bader 1853 in herb. Delessert, Genf); zwischen Sunnegga und der Tufterenalp (Merz 1951, Mme Deletra 1951, Rieber 1954); Täschtal, am Weg zur Täschalp ob Blasi (Exk. Soc. Murith. 1930, Simon 1937, Berger 1946). Damit ist die alte Angab? Kronigs von Zermatt (vgl. Cat. und Becherer Lit. 1943,S.38) bestätigt worden.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
The non-perturbative BRST quartet mechanism in Landau gauge QCD: Ghost-gluon and ghost-quark bound states
Creators: name: Alkofer, Natalia
name: Alkofer, Reinhard
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The non-perturbative BRST quartet mechanism in infrared Landau gauge QCD is presented. It is demonstrated that positivity violation for transverse gluons allows to identify the gluon's non-perturbative BRST quartet. To describe the respective BRST-daughter state a truncated Bethe-Salpeter equation for the gluon-ghost bound state is investigated. An analogous construction for quarks yields a truncated Bethe-Salpeter equation for the quark-ghost bound state. The gluon-ghost bound state equation in two space-time dimensions has been numerically solved.
description: 3 pages, 1 figure; Poster presented at the Xth Quark Confinement and the Hadron Spectrum, Munich, Germany, 2012
Comparing interferometry techniques for multi-degree of freedom test mass readout
Creators: name: Isleif, Katharina-Sophie
name: Gerberding, Oliver
name: Mehmet, Moritz
name: Schwarze, Thomas S.
name: Heinzel, Gerhard
name: Danzmann, Karsten
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2016
Subjects: subject: Degrees of freedom (mechanics)
subject: Gravitational effects
subject: Gravity waves
subject: Interferometry
subject: Laser interferometry
subject: Phase modulation
subject: Space probes
subject: Ultrasonic devices
subject: Gravitational physics
subject: Gravitational-wave detection
subject: Interferometry technique
subject: Gravitationswelle
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Laser interferometric readout systems with 1pm √Hz precision over long time scales have successfully been developed for LISA and LISA Pathfinder. Future gravitational physics experiments, for example in the fields of gravitational wave detection and geodesy, will potentially require similar levels of displacement and tilt readouts of multiple test masses in multiple degrees of freedom. In this article we compare currently available classic interferometry schemes with new techniques using phase modulations and complex readout algorithms. Based on a simple example we show that the new techniques have great potential to simplify interferometric readouts.
A new high-integrated weak field sensor for automotive applications
Creators: name: Thiessen, T.
name: Prochaska, M.
Publisher: name: Göttingen : Copernicus GmbH
Year: 2009
Subjects: subject: Application area
subject: Automotive applications
subject: Low-power consumption
subject: Magnetic field sensing
subject: Magnetic performance
subject: Production cost
subject: Sensor systems
subject: Weak magnetic fields
subject: Electric network topology
subject: Magnetic fields
subject: Smart sensors
subject: Automobiles
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Especially in the field of automotive applications smart sensor systems for magnetic field sensing face increasing requirements concerning low cost, low power consumption and high magnetic performance. Over the past years AMR sensors play a decisive role in this application area because of their robustness and stability. In the following a high-integrated smart sensor system for magnetic field sensing is presented. A novel approach for the detection of weak magnetic fields is shown, which is based on an AC-excitation of AMR elements. In contrast to common used sensors this concept is based on a nonlinear AMR element without Barber pole construction. By means of this methodology sensitivity as well as temperature and life time stability is significantly improved, while the production costs compared to common-used sensors are reduced. Within this novel approach new signal conditioning algorithms and analog circuit topologies are presented, which are able to meet low offset and low noise requirements.