cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Duchon-Robert solutions for the Rayleigh-Taylor and Muskat problems
Creators: name: Beck, Thomas
name: Sosoe, Philippe
name: Wong, Percy
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We construct analytic solutions to the Euler equations with an interface between two fluids, extending work of Duchon and Robert. We also show that the estimates of Duchon and Robert yield global analytic solutions to the Muskat problem with small initial data.
description: 18 pages. To appear, J. Diff. Eqns
Quasi-circles through prescribed points
Creators: name: Mackay, John M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 30L10, 30C65, 51F99

description: We show that in an L-annularly linearly connected, N-doubling, complete metric space, any n points lie on a K-quasi-circle, where K depends only on L, N and n. This implies, for example, that if G is a hyperbolic group that does not split over any virtually cyclic subgroup, then any geodesic line in G lies in a quasi-isometrically embedded copy of the hyperbolic plane.
description: v1: 15 pages, 2 figures; v2: 16 pages, 2 figures. Minor changes. Version accepted by IUMJ
Groups of piecewise projective homeomorphisms
Creators: name: Monod, Nicolas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Group Theory (math.GR)
subject: Dynamical Systems (math.DS)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: The group of piecewise projective homeomorphisms of the line provides straightforward counter-examples to the so-called von Neumann conjecture. The examples are so simple that many additional properties can be established.
description: This version submitted to PNAS on October 22, 2012. Final version published in PNAS at http://dx.doi.org/10.1073/pnas.1218426110
Characterization of tropical hemispaces by (P,R)-decompositions
Creators: name: Katz, Ricardo D.
name: Nitica, Viorel
name: Sergeev, Sergei
Publisher: name: arXiv
Year: 2012
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 15A80, 14T05, 52A01

description: We consider tropical hemispaces, defined as tropically convex sets whose complements are also tropically convex, and tropical semispaces, defined as maximal tropically convex sets not containing a given point. We introduce the concept of $(P,R)$-decomposition. This yields (to our knowledge) a new kind of representation of tropically convex sets extending the classical idea of representing convex sets by means of extreme points and rays. We characterize tropical hemispaces as tropically convex sets that admit a (P,R)-decomposition of certain kind. In this characterization, with each tropical hemispace we associate a matrix with coefficients in the completed tropical semifield, satisfying an extended rank-one condition. Our proof techniques are based on homogenization (lifting a convex set to a cone), and the relation between tropical hemispaces and semispaces.
description: 29 pages, 3 figures
Can you compute the operator norm?
Creators: name: Fritz, Tobias
name: Netzer, Tim
name: Thom, Andreas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Functional Analysis (math.FA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 43A20

description: In this note we address various algorithmic problems that arise in the computation of the operator norm in unitary representations of a group on Hilbert space. We show that the operator norm in the universal unitary representation is computable if the group is residually finite-dimensional or amenable with decidable word problem. Moreover, we relate the computability of the operator norm on the product of non-abelian free groups to Kirchberg's QWEP Conjecture, a fundamental open problem in the theory of operator algebras.
description: 15 pages, no figures; v2 is a slightly revised version
Defect physics and electronic properties of Cu3PSe4 from first principles
Creators: name: Foster, D. H.
name: Barras, F. L.
name: Vielma, J. M.
name: Schneider, G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The p-type semiconductor Cu3PSe4 has recently been established to have a direct bandgap of 1.4 eV and an optical absorption spectrum similar to GaAs [Applied Physics Letters, 99, 181903 (2011)], suggesting a possible application as a solar photovoltaic absorber. Here we calculate the thermodynamic stability, defect energies and concentrations, and several material properties of Cu3PSe4 using a wholly GGA+U method (the generalized gradient approximation of density functional theory with a Hubbard U term included for the Cu-d orbitals). We find that two low energy acceptor-type defects, the copper vacancy V_Cu and the phosphorus-on-selenium antisite P_Se, establish the p-type behavior and likely prevent any n-type doping near thermal equilibrium. The GGA+U defect calculation method is shown to yield more accurate results than the more standard method of applying post-calculation GGA+U-based bandgap corrections to strictly GGA defect calculations.
description: 8 pages, 4 figures
Quasiminimal structures and excellence
Creators: name: Bays, Martin
name: Hart, Bradd
name: Hyttinen, Tapani
name: Kesälä, Meeri
name: Kirby, Jonathan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03C45

description: We show that the excellence axiom in the definition of Zilber's quasiminimal excellent classes is redundant, in that it follows from the other axioms. This substantially simplifies a number of categoricity proofs.
description: Detail added to proof of 5.2; publication info added
Kähler-driven Tribrid Inflation
Creators: name: Antusch, Stefan
name: Nolde, David
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We discuss a new class of tribrid inflation models in supergravity, where the shape of the inflaton potential is dominated by effects from the Kähler potential. Tribrid inflation is a variant of hybrid inflation which is particularly suited for connecting inflation with particle physics, since the inflaton can be a D-flat combination of charged fields from the matter sector. In models of tribrid inflation studied so far, the inflaton potential was dominated by either loop corrections or by mixing effects with the waterfall field (as in "pseudosmooth" tribrid inflation). Here we investigate the third possibility, namely that tribrid inflation is dominantly driven by effects from higher-dimensional operators of the Kähler potential. We specify for which superpotential parameters the new regime is realized and show how it can be experimentally distinguished from the other two (loop-driven and "pseudosmooth") regimes.
description: 28 pages, v2: added some references, this version matches the publication in JCAP
Scaling Dimensions in AdS/QCD and the Gluon Field Strength Propagator
Creators: name: Powell, Joshua W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive the scaling dimension of antisymmetric tensor operators in the boundary theory of the AdS/CFT correspondence using a functional integral representation of the boundary-to-boundary propagators of their dual fields in the bulk. We then apply this technique to AdS/QCD in which the bulk metric is warped, resulting in non-constant scaling dimensions. In particular, we compute the two-point correlation function of gluon field strength operators, for which it is prerequisite to know the ow of the anomalous scaling dimension under rescaling. The results are in very good agreement with quenched lattice QCD data, thus confirming the functional form of the scaling dimension.
description: 10 pages, 3 figures
Distortion elements for surface homeomorphisms
Creators: name: Militon, Emmanuel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Let S be a compact orientable surface and f be an element of the group Homeo_{0}(S) of homeomorphisms of S isotopic to the identity. Denote by F a lift of f to the universal cover of S. In this article, the following result is proved: if there exists a fundamental domain D of the universal cover of S such that the sequence (d_{n}log(d_{n})/n) converges to 0 where d_{n} is the diameter of F^{n}(D), then the homeomorphism f is a distortion element of the group Homeo_{0}(S).
Die Sanmicheli-Ausstellung in Verona
Creators: name: Spielmann, Heinz
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 14 Nr. 2 (1961): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Eine Erwiderung
Creators: name: Winzinger, Franz
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 3 Nr. 5 (1950): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Integrability of Discrete Equations Modulo a Prime
Creators: name: Kanki, Masataka
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37K10, 34M55, 37P25

description: We apply the 'almost good reduction' (AGR) criterion, which has been introduced in our previous (arXiv:1206.4456 and arXiv:1209.0223), to several classes of discrete integrable equations. We verify our conjecture that AGR plays the same role for maps of the plane define over simple finite fields as the notion of the singularity confinement does. We first prove that q-discrete analogues of the Painlevé III and IV equations have AGR. We next prove that the Hietarinta-Viallet equation, a non-integrable chaotic system also has AGR.
Edge AI Technology Trends
Creators: name: Vermesan, Ovidiu
name: Diaz Nava, Mario
Publisher: name: Zenodo
Year: 2023

description: The presentation gives an overview of the edge AI technology developments. It presents the AI paradigm shift from the cloud approach with high bandwidth, high centralised processing power, and high latency to more edge computing and distributed AI, with lower bandwidth and reduced centralised computing power, more real-time response and improved privacy at the micro-, deep-, and meta-edge. Several challenges and technology trends are introduced and discussed.
Zur Herkunft der Folter
Creators: name: Hofmeister, Herbert
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 11 Nr. 1 (1970): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Homotopies and the universal fixed point property
Creators: name: Szymik, Markus
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 54H25, 55M20, 47H10

description: A topological space has the fixed point property if every continuous self-map of that space has at least one fixed point. We demonstrate that there are serious restraints imposed by the requirement that there be a choice of fixed points that is continuous whenever the self-map varies continuously. To even specify the problem, we introduce the universal fixed point property. Our results apply in particular to the analysis of convex subspaces of Banach spaces, to the topology of finite-dimensional manifolds and CW complexes, and to the combinatorics of Kolmogorov spaces associated with finite posets.
description: 17 pages, 2 figures
PSYCHOLOGICAL CHARACTERISTICS OF ADOLESCENCE AND ITS RESEARCH.
Creators: name: Kokan State Pedagogical Institute Teacher of the Department of Interfaculty Pedagogy and Psychology (Ph.D.)  Mamayusupova Iroda Khamidovna
Publisher: name: Zenodo
Year: 2023

description: The article shows the solution to the psychological problems of the younger generation associated with learning and changes in their attention, senses and imagination in early adolescence. During early adolescence, the moral relations of family and society receive information about what the realization of the personal "I" is based on active activity.
Key words:
 teenager, attention, stage, psychophysiological aspect of the relationship, hormonal processes, psycho-emotional, physiologist, process
Mediated gates between spin qubits
Creators: name: Fei, Jianjia
name: Zhou, Dong
name: Shim, Yun-Pil
name: Oh, Sangchul
name: Hu, Xuedong
name: Friesen, Mark
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In a typical quantum circuit, nonlocal quantum gates are applied to nonproximal qubits. If the underlying physical interactions are short-range (e.g., exchange interactions between spins), intermediate swap operations must be introduced, thus increasing the circuit depth. Here we develop a class of "mediated" gates for spin qubits, which act on nonproximal spins via intermediate ancilla qubits. At the end of the operation, the ancillae return to their initial states. We show how these mediated gates can be used (1) to generate arbitrary quantum states and (2) to construct arbitrary quantum gates. We provide some explicit examples of circuits that generate common states [e.g., Bell, Greenberger-Horne-Zeilinger (GHZ), W, and cluster states] and gates (e.g.,square-root-SWAP, SWAP, CNOT, and Toffoli gates). We show that the depths of these circuits are often shorter than those of conventional swap-based circuits. We also provide an explicit experimental proposal for implementing a mediated gate in a triple-quantum-dot system.
description: 12 pages, 8 figures, 2 tables
Policy Brief 3: Owning and Managing Living and Renewable Natural Resources and Biodiversity
Creators: name: JUSTNORTH
Publisher: name: Zenodo
Year: 2023
Subjects: Arctic economies, Economic development, Sustainable development, Values

description: The policy brief assesses issues of justice and sustainable development related to owning and managing resources in the North. JUSTNORTH case studies focused on sustainable development that relies on living and non-living resources such as fish, reindeer, and landscape are highlighted in this brief. Policy recommendations for a more sustainable Arctic future based on living and non-living resources are presented.
Short-time behaviour of a modified Laplacian coflow of G2-structures
Creators: name: Grigorian, Sergey
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 53C25 (Primary) 53C44, 53C29 (Secondary)

description: We modify the Laplacian coflow of co-closed G2-structures - $\frac{d}{dt}ψ=Δψ$ where $ψ$ is the closed dual 4-form of a $G_{2}$-structure $φ$. The modified flow is now parabolic in the direction of closed forms upto diffeomorphisms. We then prove short time existence and uniqueness of solutions to the modified flow.
description: 39 pages, fixed typos, expanded published version
On the nuclear $(n;t)-$reaction in the three-electron ${}^{6}$Li atom
Creators: name: Frolov, Alexei M.
name: Wardlaw, David M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The nuclear $(n;t)-$reaction of the three-electron ${}^{6}$Li atom with thermal/slow neutrons is considered. An effective method has been developed for determining the probabilities of formation of various atoms and ions in different bound states. We discuss a number of fundamental questions directly related to numerical computations of the final state atomic probabilities. A few appropriate variational expansions for atomic wave functions of the incident lithium atom and final helium atom and/or tritium negatively charged ion are discussed. It appears that the final ${}^4$He atom arising during the nuclear $(n,{}^{6}$Li; ${}^4$He$,t)$-reaction in the three-electron Li atom can also be created in its triplet states. The formation of the quasi-stable three-electron $e^{-}_3$ during the nuclear $(n; t)-$reaction at the Li atom is briefly discussed. Bremsstrahlung emitted by atomic electrons accelerated by the rapidly moving nuclear fragments from this reaction is analyzed. The frequency spectrum of the emitted radiation is investigated.
description: arXiv admin note: substantial text overlap with arXiv:1107.3816
Fractional-Hyperbolic Systems
Creators: name: Kochubei, Anatoly N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35R11, 35L99

description: We describe a class of evolution systems of linear partial differential equations with the Caputo-Dzhrbashyan fractional derivative of order $α\in (0,1)$ in the time variable $t$ and the first order derivatives in spatial variables $x=(x_1,...,x_n)$, which can be considered as a fractional analogue of the class of hyperbolic systems. For such systems, we construct a fundamental solution of the Cauchy problem having exponential decay outside the fractional light cone $\{(t,x):\ |t^{-α}x|\le 1\}$.
description: Final version. available at http://link.springer.com/journal/13540
Standardization of Transcriptome Analysis Improves Gene Selection for Sugarcane (Saccharum spp.) Breeding
Creators: name: Carvalho, Pedro Cristóvão
name: Bombardelli, Renato Gustavo Hoffmann
name: Monteiro-Vitorello, Claudia Barros
name: Figueira, Antonio Vargas de Oliveira
Publisher: name: Zenodo
Year: 2023

description: Climate changes impose the urgency for the development of more drought tolerant sugarcane (Saccharum spp.), a crop with great importance. The identification of molecular mechanisms associated with improved tolerance to water deficit may accelerate sugarcane breeding by either transgenic or genomic selection approaches. Here, we investigated if the standardization of massive gene expression analysis may assist in determining potential candidate genes with higher precision. We analyzed 16 RNA-seq libraries publicly available at the Sequence Read Archive (SRA) from NCBI involving sugarcane and water deficit treatment as the common factors. All reads were mapped against the COMPGG transcriptome, a de novo assembly from six sugarcane cultivars, by STAR 2.7.10b and count tables were generated by SamTools 1.15.1. The count tables were then analyzed by the DESeq2 package for R, defining as differentially expressed genes (DEGs) those with p-values < 0.05 and log-fold change values > 2 for overexpressed genes and < -2 for underexpressed. DEGs were then ran using NetworkX (Python) into the biological network developed and published by Rody et al. (2021), which includes data mining of metabolic pathways from BioGRID and KEGG, and protein-protein interactions from SwissProt. The complete network was analyzed through Cytoscape 3.8.1, providing the complete annotation for every DEG. The set of most frequent DEGs between all the 16 libraries were submitted to a gene set enrichment analysis (GSEA), revealing 788 terms for biological processes (cellular process as the most frequent), followed by 252 terms for molecular function (protein binding as the most frequent), and 79 for cellular components (plasma membrane as the most frequent). Curiously, the most common gene among libraries was a Sucrose Galactosyltransferase, a component of the galactose metabolism pathway, responsible for the initial steps of the biosynthesis of galactose, glucose and fructose, being this whole process overrepresented with genes from the current analysis. Within all the 86 enriched pathways, the amino sugar and nucleotide sugar metabolism was the most represented with 29 genes. Therefore, we conclude that the standardization of the analysis from previously published data can provide precise information for gene prospection for functional analysis.
Thermalization and Cooling of Plasmon-Exciton Polaritons: Towards Quantum Condensation
Creators: name: Rodriguez, S. R. K.
name: Feist, J.
name: Verschuuren, M. A.
name: Vidal, F. J. Garcia
name: Rivas, J. Gomez
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We present indications of thermalization and cooling of quasi-particles, a precursor for quantum condensation, in a plasmonic nanoparticle array. We investigate a periodic array of metallic nanorods covered by a polymer layer doped with an organic dye at room temperature. Surface lattice resonances of the array---hybridized plasmonic/photonic modes---couple strongly to excitons in the dye, and bosonic quasi-particles which we call plasmon-exciton-polaritons (PEPs) are formed. By increasing the PEP density through optical pumping, we observe thermalization and cooling of the strongly coupled PEP band in the light emission dispersion diagram. For increased pumping, we observe saturation of the strong coupling and emission in a new weakly coupled band, which again shows signatures of thermalization and cooling.
description: 8 pages, 5 figures including supplemental material. The newest version includes new measurements and corrections to the interpretation of the results
Physical properties underlying observed kinematics of satellite galaxies
Creators: name: Wojtak, Radoslaw
name: Mamon, Gary A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the kinematics of satellites around isolated galaxies selected from the Sloan Digital Sky Survey (SDSS) spectroscopic catalog. Using a model of the phase-space density previously measured for the halos of LCDM dark matter cosmological simulations, we determine the properties of the halo mass distribution and the orbital anisotropy of the satellites as a function of the colour-based morphological type and the stellar mass of the central host galaxy. We place constraints on the halo mass and the concentration parameter of dark matter and the satellite number density profiles. We obtain a concentration-mass relation for galactic dark matter haloes that is consistent with predictions of a standard LCDM cosmological model. At given halo or stellar mass, red galaxies have more concentrated halos than their blue counterparts. The fraction of dark matter within a few effective radii is minimal for 11.25
description: 12 pages, 11 figures; accepted for publication in MNRAS (updated references)
From theory to practice: Examining evidence-based approaches in youth sport coaches in Singapore
Creators: name: Loo, Joanne
name: Choong, Gabriel
name: Chew, Lewis
name: Suppiah, Haresh
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 32
subject: Biomedical and clinical sciences
classificationCode: 52
subject: Psychology
subject: FOS: Psychology
classificationCode: 42
subject: Health sciences
subject: FOS: Health sciences

description: No description supplied
The semileptonic decays $B_c^* \to η_c \ell \barν_{\ell} $ with QCD sum rules
Creators: name: Wang, Zhi-Gang
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article, we calculate the $B_c^* \to η_c$ form-factors with the three-point QCD sum rules, then study the semileptonic decays $B_c^* \to η_c \ell \barν_{\ell}$. The tiny decay widths may be observed experimentally in the future at the LHCb, while the $B_c^* \to η_c$ form-factors can be taken as basic input parameters in other phenomenological analysis.
description: 12 pages, 6 figures, slight revision
Oswald Goetz †
Creators: name: Heise, Carl Georg
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 14 Nr. 2 (1961): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Disorder and quasiparticle interference in heavy-fermion materials
Creators: name: Toldin, Francesco Parisen
name: Figgins, Jeremy
name: Kirchner, Stefan
name: Morr, Dirk K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using a large-N approach, we study the effect of disorder in the Kondo-screened phase of heavy-fermion materials. We demonstrate that the strong feedback between the hybridization and the conduction electron charge density magnifies the effect of disorder, such that already small concentrations of defects strongly disorder the materials' local electronic structure, while only weakly affecting their spatially averaged, thermodynamic properties. Finally, we show that the microscopic nature of defects can be identified through their characteristic signatures in the hybridization and quasiparticle interference spectrum.
description: 5 pages; v2: published version
Charged Cylindrical Black Holes in Conformal Gravity
Creators: name: Said, Jackson Levi
name: Sultana, Joseph
name: Adami, Kristian Zarb
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Considering cylindrical topology we present the static solution for a charged black hole in conformal gravity. We show that unlike the general relativistic case there are two different solutions, both including a factor that when set to zero recovers the familiar static charged black string solution in Einstein's theory. This factor gives rise to a linear term in the potential that also features in the neutral case and may have significant ramifications for particle trajectories.
description: 8 pages
Bayesian constraints on dark matter halo properties using gravitationally-lensed supernovae
Creators: name: Karpenka, N. V.
name: March, M. C.
name: Feroz, F.
name: Hobson, M. P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A hierarchical Bayesian method is applied to the analysis of Type-Ia supernovae (SNIa) observations to constrain the properties of the dark matter haloes of galaxies along the SNIa lines-of-sight via their gravitational lensing effect. The full joint posterior distribution of the dark matter halo parameters is explored using the nested sampling algorithm {\sc MultiNest}, which also efficiently calculates the Bayesian evidence, thereby facilitating robust model comparison. We first demonstrate the capabilities of the method by applying it to realistic simulated SNIa data, based on the real 3-year data release from the Supernova Legacy Survey (SNLS3). Assuming typical values for the halo parameters in our simulations, we find that a catalogue analogous to the existing SNLS3 data set is incapable of detecting the lensing signal, but a catalogue containing approximately three times as many SNIa does produce robust and accurate parameter constraints and model selection results for two halo models: a truncated singular isothermal sphere (SIS) and a Navarro--Frenk--White (NFW) profile, thereby validating our analysis methodology. In the analysis of the real SNLS3 data, contrary to previous studies, we obtain only a very marginal detection of a lensing signal and weak constraints on the halo parameters for the truncated SIS model, although these constraints are tighter than those obtained from the equivalent simulated SNIa data set. This difference is driven by a preferred value of $η\approx 1$ in the assumed scaling-law $σ\propto L^η$ between velocity dispersion and luminosity, which is somewhat higher than the canonical values of $η= \tfrac{1}{4}$ and $η= \tfrac{1}{3}$ for early and late-type galaxies, respectively, and leads to a stronger lensing effect by the halo. No detection of a lensing signal is made for the NFW model.
description: Revised version matches manuscript accepted by MNRAS: Manuscript ID: MN-12-1716-MJ.R2
Die Arbeitsqualität der Saatbettbereitung in Abhängigkeit von der Bodenfeuchte
Creators: name: Knappenberger, Thorsten
Publisher: name: LANDTECHNIK
Year: 2006

description: Die Arbeitsqualität von Bodenbearbeitung und Saatbettbereitung hängt in entscheidendem Maße vom Bodenwassergehalt ab. Auf homogenen Schlägen lässt sich zum richtigen Bearbeitungszeitpunkt ein befriedigendes Ergebnis bei der Saatbettbereitung erzielen. Sind die Schläge jedoch heterogen, variiert der Bearbeitungserfolg auf der Fläche.
description: LANDTECHNIK, Bd. 61 Nr. SH (2006): Sonderheft (2006)
Nachrichten
Creators: name: Redaktion, Die
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 11 Nr. 1 (1970): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
The δN formula is the dynamical renormalization group
Creators: name: Dias, Mafalda
name: Ribeiro, Raquel H.
name: Seery, David
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive the 'separate universe' method for the inflationary bispectrum, beginning directly from a field-theory calculation. We work to tree-level in quantum effects but to all orders in the slow-roll expansion, with masses accommodated perturbatively. Our method provides a systematic basis to account for novel sources of time-dependence in inflationary correlation functions, and has immediate applications. First, we use our result to obtain the correct matching prescription between the 'quantum' and 'classical' parts of the separate universe computation. Second, we elaborate on the application of this method in situations where its validity is not clear. As a by-product of our calculation we give the leading slow-roll corrections to the three-point function of field fluctuations on spatially flat hypersurfaces in a canonical, multiple-field model.
description: v1: 33 pages, plus appendix and references; 5 figures. v2: typographical typos fixed, minor changes to the main text and abstract, reference added; matches version published in JCAP
On the ample cone of a rational surface with an anticanonical cycle
Creators: name: Friedman, Robert
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Let $Y$ be a smooth rational surface and let $D$ be a cycle of rational curves on $Y$ which is an anticanonical divisor, i.e. an element of $|-K_Y|$. Looijenga studied the geometry of such surfaces $Y$ in case $D$ has at most five components and identified a geometrically significant subset $R$ of the divisor classes of square -2 orthogonal to the components of $D$. Motivated by recent work of Gross, Hacking, and Keel on the global Torelli theorem for pairs $(Y,D)$, we attempt to generalize some of Looijenga's results in case $D$ has more than five components. In particular, given an integral isometry $f$ of $H^2(Y)$ which preserves the classes of the components of $D$, we investigate the relationship between the condition that $f$ preserves the "generic" ample cone of $Y$ and the condition that $f$ preserves the set $R$.
description: 20 pages, added Proposition 2.18, minor typos corrected, to appear in Algebra & Number Theory
Electron-positron flows around magnetars
Creators: name: Beloborodov, Andrei M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The twisted magnetospheres of magnetars must sustain a persistent flow of electron-positron plasma. The flow dynamics is controlled by the radiation field around the hot neutron star. The problem of plasma motion in the self-consistent radiation field is solved using the method of virtual beams. The plasma and radiation exchange momentum via resonant scattering and self-organize into the "radiatively locked" outflow with a well-defined, decreasing Lorentz factor. There is an extended zone around the magnetar where the plasma flow is ultra-relativistic; its Lorentz factor is self-regulated so that it can marginally scatter thermal photons. The flow becomes slow and opaque in an outer equatorial zone, where the decelerated plasma accumulates and annihilates; this region serves as a reflector for the thermal photons emitted by the neutron star. The e+- flow carries electric current, which is sustained by a moderate induced electric field. The electric field maintains a separation between the electron and positron velocities, against the will of the radiation field. The two-stream instability is then inevitable, and the induced turbulence can generate low-frequency emission. In particular, radio emission may escape around the magnetic dipole axis of the star. Most of the flow energy is converted to hard X-ray emission, which is examined in the accompanying paper.
description: 20 pages, 10 figures, accepted to ApJ
title: Translating student diversity
title: How German universities respond to the political discourse on widening participation
titleType: AlternativeTitle
Creators: name: Mergner, Julia
Publisher: name: TU Dortmund
Year: 2021
Subjects: subject: Higher education research
subject: Qualitative research
subject: Scandinavian institutionalism
subject: Student diversity
subject: Translation perspective
subject: Widening participation
subject: 370
subject: Hochschulbildung
subject: Forschung
subject: Behinderung
subject: Teilhabe
subject: Skandinavien
subject: Deutschland

description: The dissertation examines how German universities respond to student diversity in the context of the widening participation agenda and how variations in organizational responses can be explained. As a theoretical framework, the study builds on Scandinavian institutionalism (Czarniawska & Joerges, 1996) that seeks to understand how organizations interpret institutional pressures and how these interpretations affect their daily organizational practices (Boxenbaum & Strangaard Pedersen, 2009; Sahlin & Wedlin, 2008). The study chooses the QPL funding program as one concrete example for a soft steering instrument within the widening participation agenda. To account for local variations, this study builds on a multiple case study design including three universities that participated in the QPL funding program and differ in type of institution, location and institutional profile. Data sources from the three case study universities include publicly accessible text materials, semi-structured interviews, group discussions and protocols from participatory observations. The processes of data collection and analysis were guided by strategies of grounded theory (Glaser & Strauss, 1967). The findings indicate how diversely universities interpreted the idea of student diversity in the context of the QPL initiative. Here the study explores not only how universities translate the institutional demand rhetorically or make ceremonial decisions, but also how these translations affect their daily routines and activities of teaching and studying. In addition, the results support theoretical assumptions that the act of interpretation is guided by institutional beliefs and norms that derive from the local context (Boxenbaum & Jonsson, 2008). The study identified institutional characteristics and dominant diversity paradigms as explanatory factors for local variations. Finally, in accordance with Scandinavian institutionalism, the study pays special attention to how the idea of student diversity is materialized on the level of concrete actions at German universities. Using the coding paradigm (Corbin & Strauss, 1990), the study identified seven organizational practices to deal with student diversity that differ not only in their definitions of student diversity but also in terms of the contextual conditions in which they appear.
Detector-induced backaction on the counting statistics of a double quantum dot
Creators: name: Li, Zeng-Zhao
name: Lam, Chi-Hang
name: Yu, Ting
name: You, J. Q.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Full counting statistics of electron transport is of fundamental importance for a deeper understanding of the underlying physical processes in quantum transport in nanoscale devices. The backaction effect from a detector on the nanoscale devices is also essential due to its inevitable presence in experiments. Here we investigate the backaction of a charge detector in the form of a quantum point contact (QPC) on the counting statistics of a biased double quantum dot (DQD). We show that this inevitable QPC-induced backaction can have profound effects on the counting statistics under certain conditions, e.g., changing the shot noise from being sub-Poissonian to super-Poissonian, and changing the skewness from being positive to negative. Also, we show that both Fano factor and skewness can be either enhanced or suppressed by increasing the energy difference between two single-dot levels of the DQD under the detector-induced backaction.
description: 14 pages, 5 figures; comments are welcome
Die Ausstellung "Fugger und Welser" in Schaezlerhaus, Augsburg
Creators: name: Erffa, Hans Martin Von
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 3 Nr. 9 (1950): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Fingerprints of antiaromaticity in the negative ion (Li$_3$Al$_4$)$^-$ via an ab initio quantum-chemical study of the equilibrium structure of the inhomogeneous electron liquid
Creators: name: Grassi, A.
name: Lombardo, G. M.
name: Angilella, G. G. N.
name: March, N. H.
name: Pucci, R.
name: Klein, D. J.
name: Balaban, A. T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Fingerprints of antiaromaticity in the negative ion (Li$_3$Al$_4$)$^-$, this species being realizable via a laser vaporization technique, are revealed by means of an \emph{ab initio} quantum-chemical investigation. First, the ground-state equilibrium geometry of this ion is predicted. Also, for the corresponding inhomogeneous electron liquid, the characteristics of the HOMO are studied, both for the square and the rectangular Al$_4$ geometry in two low-lying isomers of the negative ion. There is no particular sensitivity to the change in geometry of the Al$_4$ configuration. Therefore, we have calculated theoretically chemical shifts (NICS), which contain remarkable fingerprints of antiaromaticity. As to future directions, some comments are added in relation to the Shannon entropy.
description: Phys. Chem. Liquids (to appear in vol. 52, 2014)
On the 3D structure of the mass, metallicity, and SFR space for SF galaxies
Creators: name: Lara-Lopez, Maritza A.
name: Lopez-Sanchez, Angel R.
name: Hopkins, Andrew M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We demonstrate that the space formed by the star-formation rate (SFR), gas-phase metallicity (Z), and stellar mass (M), can be reduced to a plane, as first proposed by Lara-Lopez et al. We study three different approaches to find the best representation of this 3D space, using a principal component analysis, a regression fit, and binning of the data. The PCA shows that this 3D space can be adequately represented in only 2 dimensions, i.e., a plane. We find that the plane that minimises the chi^2 for all variables, and hence provides the best representation of the data, corresponds to a regression fit to the stellar mass as a function of SFR and $Z$, M=f(Z,SFR). We find that the distribution resulting from the median values in bins for our data gives the highest chi^2. We also show that the empirical calibrations to the oxygen abundance used to derive the Fundamental Metallicity Relation (Nagao et al.) have important limitations, which contribute to the apparent inconsistencies. The main problem is that these empirical calibrations do not consider the ionization degree of the gas. Furthermore, the use of the N2 index to estimate oxygen abundances cannot be applied for ~8.8 because of the saturation of the [NII]6584 line in the high-metallicity regime. Finally we provide an update of the Fundamental Plane derived by Lara-Lopez et al.
description: ApJ, accepted. 15 pages, 13 figures
Mitgliederversammlung des Verbandes deutscher Kunsthistoriker E. V. Nürnberg, 12. August 1952
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 5 Nr. 9 (1952): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Ausstellungskalender
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 5 Nr. 9 (1952): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Conformal invariants of twisted Dirac operators and positive scalar curvature
Creators: name: Benameur, Moulay-Tahar
name: Mathai, Varghese
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: For a closed, spin, odd dimensional Riemannian manifold $(Y,g)$, we define the rho invariant $ρ_{spin}(Y,E,H, g)$ for the twisted Dirac operator $D^E_H$ on $Y$, acting on sections of a flat hermitian vector bundle $E$ over $Y$, where $H = \sum i^{j+1} H_{2j+1}$ is an odd-degree closed differential form on $Y$ and $H_{2j+1}$ is a real-valued differential form of degree ${2j+1}$. We prove that it only depends on the conformal class of the pair $[H,g]$. In the special case when $H$ is a closed 3-form, we use a Lichnerowicz-Weitzenbock formula for the square of the twisted Dirac operator, to show that whenever $Y$ is a closed spin manifold, then $ρ_{spin}(Y,E,H, g)= ρ_{spin}(Y,E, g)$ for all $|H|$ small enough, whenever g is a Riemannian metric of positive scalar curvature. When $H$ is a top-degree form on an oriented three dimensional manifold, we also compute $ρ_{spin}(Y,E,H, g)$.
description: 13+2 pages, Latex 2e. Statement of conformal invariance corrected in erratum
Mantegna-Ausstellung in Mantua
Creators: name: Boeck, Wilhelm
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 14 Nr. 12 (1961): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Subtraction of Newtonian Noise Using Optimized Sensor Arrays
Creators: name: Driggers, Jennifer C.
name: Harms, Jan
name: Adhikari, Rana X.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Fluctuations in the local Newtonian gravitational field present a limit to high precision measurements, including searches for gravitational waves using laser interferometers. In this work, we present a model of this perturbing gravitational field and evaluate schemes to mitigate the effect by estimating and subtracting it from the interferometer data stream. Information about the Newtonian noise is obtained from simulated seismic data. The method is tested on causal as well as acausal implementations of noise subtraction. In both cases it is demonstrated that broadband mitigation factors close to 10 can be achieved removing Newtonian noise as a dominant noise contribution. The resulting improvement in the detector sensitivity will substantially enhance the detection rate of gravitational radiation from cosmological sources.
description: 29 pages, 11 figures
title: Effizienz- und Flexibilisierungskonzepte in der industriellen Gebäudeklimatisierung
title: Experimentelle Untersuchungen mit simulations- und prognosebasierter Optimierung
Creators: name: Heidrich, Tobias
Publisher: name: Universität Kassel
Year: 2021
Subjects: subject: Gebäudeklimatisierung
subject: Produktklimatisierung
subject: Modellprädiktive Regelung für raumlufttechnische Anlagen
subject: Flexible Energieversorgung
subject: 600
subject: Industrie
subject: Gebäude
subject: Klima
subject: Konzeption
subject: Effizienz
subject: Flexibilisierung

description: Zugleich: Dissertation, Universität Kassel, 2020
Time Dependent $\mathcal{PT}$-Symmetric Quantum Mechanics
Creators: name: Gong, Jiangbin
name: Wang, Qing-hai
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The parity-time-reversal- ($\mathcal{PT}$) symmetric quantum mechanics (PTQM) has developed into a noteworthy area of research. However, to date most known studies of PTQM focused on the spectral properties of non-Hermitian Hamiltonian operators. In this work, we propose an axiom in PTQM in order to study general time-dependent problems in PTQM, e.g., those with a time-dependent $\mathcal{PT}$-symmetric Hamiltonian and with a time-dependent metric. We illuminate our proposal by examining a proper mapping from a time-dependent Schrödinger-like equation of motion for PTQM to the familiar time-dependent Schrödinger equation in conventional quantum mechanics. The rich structure of the proper mapping hints that time-dependent PTQM can be a fruitful extension of conventional quantum mechanics. Under our proposed framework, we further study in detail the Berry phase generation in a class of $\mathcal{PT}$-symmetric two-level systems. It is found that a closed path in the parameter space of PTQM is often associated with an open path in a properly mapped problem in conventional quantum mechanics. In one interesting case we further interpret the Berry phase as the flux of a continuously tunable fictitious magnetic monopole, thus highlighting the difference between PTQM and conventional quantum mechanics despite the existence of a proper mapping between them.
description: 22 pages, 2 figures
Hyperbolic Ax-Lindemann theorem in the cocompact case
Creators: name: Ullmo, Emmanuel
name: Yafaev, Andrei
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We prove an analogue of the classical Ax-Lindemann theorem in the context of compact Shimura varieties. Our work is motivated by J. Pila's strategy for proving the André-Oort conjecture unconditionally
description: To appear in Duke Mathematical Journal