cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Statistics of the Work Done on a Quantum Critical System by Quenching a Control Parameter
Creators: name: Silva, Alessandro
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the statistics of the work done on a quantum critical system by quenching a control parameter in the Hamiltonian. We elucidate the relation between the probability distribution of the work and the Loschmidt echo, a quantity emerging usually in the context of dephasing. Using this connection we characterize the statistics of the work done on a quantum Ising chain by quenching locally or globally the transverse field. We show that for local quenches starting at criticality the probability distribution of the work displays an interesting edge singularity.
description: 4 pages, 1 figure, final version
BiPC: Bidirectional Probability Calibration for Unsupervised Domain Adaption
Creators: name: Zhou, Wenlve
name: Zhou, Zhiheng
name: Shang, Junyuan
name: Niu, Chang
name: Zhang, Mingyue
name: Tao, Xiyuan
name: Wang, Tianlei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Unsupervised Domain Adaptation (UDA) leverages a labeled source domain to solve tasks in an unlabeled target domain. While Transformer-based methods have shown promise in UDA, their application is limited to plain Transformers, excluding Convolutional Neural Networks (CNNs) and hierarchical Transformers. To address this issues, we propose Bidirectional Probability Calibration (BiPC) from a probability space perspective. We demonstrate that the probability outputs from a pre-trained head, after extensive pre-training, are robust against domain gaps and can adjust the probability distribution of the task head. Moreover, the task head can enhance the pre-trained head during adaptation training, improving model performance through bidirectional complementation. Technically, we introduce Calibrated Probability Alignment (CPA) to adjust the pre-trained head's probabilities, such as those from an ImageNet-1k pre-trained classifier. Additionally, we design a Calibrated Gini Impurity (CGI) loss to refine the task head, with calibrated coefficients learned from the pre-trained classifier. BiPC is a simple yet effective method applicable to various networks, including CNNs and Transformers. Experimental results demonstrate its remarkable performance across multiple UDA tasks. Our code will be available at: https://github.com/Wenlve-Zhou/BiPC.
Filmlehrer – pädagogische Vorbilder?
Creators: name: Kumher, Ulrich
Publisher: name: Medienimpulse
Year: 2020

description: Nach einer Einleitung über Filme, in denen Lehrerinnen und Lehrer eine maßgebliche Rolle spielen, gibt der Beitrag anhand einiger bekannter Filmbeispiele Einblick in das weite Feld dieser Filmgattung und fragt dann danach, ob Pädagoginnen und Pädagogen etwas von den Filmlehrerinnen und Filmlehrern lernen können. Einige von ihnen, z. B. John Keating (in Club der toten Dichter) oder Katherine Ann Watson (in Mona Lisas Lächeln), haben immerhin ein großes Publikum angesprochen. Darüber hinaus gibt es Unterrichtshandreichungen zu Lehrerinnen- und Lehrerfilmen. Geben diese Filme Hinweise für ein pädagogisches Erfolgsrezept? – Der Artikel schließt mit Vorschlägen, wie sich Lehrerinnen- und Lehrerfilme bei der Aus- und Fortbildung von Lehrkräften einsetzen lassen.
description: Medienimpulse, Bd. 58 Nr. 1 (2020): 1/2020 – Lernen angesichts von Robotik und Computational Thinking
Rezension: „Medien und Schule. Theorie – Forschung – Praxis“ von Heike Schaumburg und Doreen Prasse.
Creators: name: Filk, Christian
Publisher: name: Medienimpulse
Year: 2020

description: In der entstehenden Netzwerkgesellschaft sehen sich Bildung und ihre Institutionen den vielfältigen Herausforderungen der Digitalisierung ausgesetzt. Christian Filk rezensiert für die MEDIENIMPULSE die breit angelegte Einführung zum Thema von Heike Schaumburg und Doreen Prasse.
description: Medienimpulse, Bd. 58 Nr. 1 (2020): 1/2020 – Lernen angesichts von Robotik und Computational Thinking
Eigenvector localization for random band matrices with power law band width
Creators: name: Schenker, Jeffrey
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 15A52, 82D30

description: It is shown that certain ensembles of random matrices with entries that vanish outside a band around the diagonal satisfy a localization condition on the resolvent which guarantees that eigenvectors have strong overlap with a vanishing fraction of standard basis vectors, provided the band width $W$ raised to a power $μ$ remains smaller than the matrix size $N$. For a Gaussian band ensemble, with matrix elements given by i.i.d. centered Gaussians within a band of width $W$, the estimate $μ\le 8$ holds.
description: 30 pages; corrected typos
„Die Maschinen werden zu einer einzigen Maschine".
Creators: name: Filk, Christian
Publisher: name: Medienimpulse
Year: 2020

description: Technikinduzierte Diskurse um ‚Lernen‘ und ‚Wissen‘ in der zweiten Hälfte des letzten Jahrhunderts sowie zu Beginn des 21. Jahrhunderts sind durch markante Strukturanalogien gekennzeichnet, vornehmlich wenn man auf hegemoniale Imperative und governmentale Diskurspraxen abstellt. Gestützt auf eine pragmatisch-systemische Technikphilosophie analysiert Christian Filk markante Eigendynamiken von Algorithmik, Robotik und Künstlicher Intelligenz (KI) und identifiziert altbekannte Dilemmata des Mensch-Maschine-Gegensatzes. Ausgehend vom genuinen Hiatus zwischen menschlichem und maschinellem ‚Lernen‘ zum einen, zwischen Konstruktivismus und Behaviorismus zum anderen reflektiert Christian Filk auf das Beziehungsgefüge von Computational Thinking und Medienpädagogik. Schließlich exploriert er wichtige theoretische und praktische Problemstellungen und Zielkonflikte – gerade hinsichtlich Artificial Intelligence (in Education) –, denen sich eine kritische Medienbildungsforschung vordringlich zu widmen hat.
description: Medienimpulse, Bd. 58 Nr. 1 (2020): 1/2020 – Lernen angesichts von Robotik und Computational Thinking
Geomorphology of the Tafilalt Basin, South-East Morocco – implications for fluvial–aeolian dynamics and wind regimes
Creators: name: Herzog, Manuel
name: Henselowsky, Felix
name: Bubenzer, Olaf
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: The hyper-arid Taflilat Basin, South-East Morocco, is dominated by two ephemeral fluvial networks and several ergs with various dune forms from barchans to mega dunes. Especially the genesis of the star dunes remains an open research question. Therefore, a new multi-sheet geomorphological map describes the surface dynamics in the basin. Identification of major surface features was done with remote sensing data and on-site surveys. The analyses were used to identify all different landscape units. Additionally, aeolian features are emphasized to deduce current wind directions. The identification of two opposite wind fields was possible and a spatial correlation in the fluvial-aeolian system is detected. The border of the opposite wind fields crosses Erg Chebbi. Hence, the star dunes are under the influence of a multimodal wind system. Overall, this new geomorphological map strengthens the understanding of the fluvial-aeolian interaction in the Tafilalt Basin and sets a baseline for ongoing in-depth studies.
Optical phase modulation by natural eye movements: application to time-domain FF-OCT image retrieval
Creators: name: Mazlin, Viacheslav
name: Xiao, Peng
name: Irsch, Kristina
name: Scholler, Jules
name: Groux, Kassandra
name: Grieve, Kate
name: Fink, Mathias
name: Boccara, Albert Claude
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Eye movements are commonly seen as an obstacle to high-resolution ophthalmic imaging. In this context we study the natural axial movements of the in vivo human eye and show that they can be used to modulate the optical phase and retrieve tomographic images via time-domain full-field optical coherence tomography (TD-FF-OCT). This approach opens a path to a simplified ophthalmic TD-FF-OCT device, operating without the usual piezo motor-camera synchronization. The device demonstrates in vivo human corneal images under the different image retrieval schemes (2-phase and 4-phase) and different exposure times (3.5 ms, 10 ms, 20 ms). Data on eye movements, acquired with a 100 kHz spectral-domain OCT with axial eye tracking, are used to study the influence of ocular motion on the probability of capturing high-signal tomographic images without phase washout. The optimal combinations of camera acquisition speed and amplitude of piezo modulation are proposed and discussed.
Observation of the suppression of the flux of cosmic rays above 4x10^19eV
Creators: name: The Pierre Auger Collaboration
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The energy spectrum of cosmic rays above 2.5x10^18eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. The spectral index gamma of the flux, J ~ E^-gamma, at energies between 4x10^18eV and 4x10^19eV is 2.69+-0.02(stat)+-0.06(syst), steepening to 4.2+-0.4(stat)+-0.06(syst) at higher energies, consistent with the prediction by Greisen and by Zatsepin and Kuz'min.
description: 7 pages, 2 figues, accepted for publication in Physics Review Letters
Rezension: „Fun“ von Paolo Bacilieri.
Creators: name: Ballhausen, Thomas
Publisher: name: Medienimpulse
Year: 2020

description: Thomas Ballhausen beschäftigt sich in dieser Rezension mit der neuen Graphic Novel des italienischen Künstlers Paolo Bacilieri: Er erzählt in „Fun“ die Geschichte der Kreuzworträtsel in Form eines vielschichtigen und tragischen Kriminalromans.
description: Medienimpulse, Bd. 58 Nr. 1 (2020): 1/2020 – Lernen angesichts von Robotik und Computational Thinking
Nonequilibrium Invariant Measure under Heat Flow
Creators: name: Delfini, L.
name: Lepri, S.
name: Livi, R.
name: Politi, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We provide an explicit representation of the nonequilibrium invariant measure for a chain of harmonic oscillators with conservative noise in the presence of stationary heat flow. By first determining the covariance matrix, we are able to express the measure as the product of Gaussian distributions aligned along some collective modes that are spatially localized with power-law tails. Numerical studies show that such a representation applies also to a purely deterministic model, the quartic Fermi-Pasta-Ulam chain.
Rezension: "David Bowie. Ein Leben" von Dylan Jones. Aus dem Englischen übersetzt von Friederike Moldenhauer.
Creators: name: Lenhart, Johanna
Publisher: name: Medienimpulse
Year: 2020

description: Dylan Jones führte mit zahlreichen Freundinnen und Freunden, Partnerinnen und Partnern sowie Familienangehörigen David Bowies Interviews und stellt so eine Biografie vor, die den faszinierenden Ausnahmekünstler in unterschiedlichen Facetten zeigt. Johanna Lenhart rezensiert für die MEDIENIMPULSE …
description: Medienimpulse, Bd. 58 Nr. 1 (2020): 1/2020 – Lernen angesichts von Robotik und Computational Thinking
Rezension: "Die Anfänge der Philosophie. Eine Einführung in die Gedankenwelt der Vorsokratiker“ von Franz von Kutschera.
Creators: name: Osmanović, Erkan
Publisher: name: Medienimpulse
Year: 2020

description: Erkan Osmanović rezensiert für die MEDIENIMPULSE die von Franz von Kutschera verfasste philosophische Einführung Die Anfänge der Philosophie. In Portraits und überblicksartigen Darstellungen wird die Entwicklung des antiken Denkens vor Sokrates, Platon und Aristoteles nachgezeichnet.
description: Medienimpulse, Bd. 58 Nr. 1 (2020): 1/2020 – Lernen angesichts von Robotik und Computational Thinking
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Grandoni, Fabrizio
name: Herman, Grzegorz
name: Sanders, Peter
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2020
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Applied computing → Transportation
subject: Theory of computation → Facility location and clustering
subject: Computing methodologies → Agent / discrete models
subject: Computing methodologies → Algebraic algorithms
subject: Computing methodologies → Combinatorial algorithms
subject: Human-centered computing → Graph drawings
subject: Mathematics of computing → Approximation algorithms
subject: Mathematics of computing → Combinatorial algorithms
subject: Mathematics of computing → Graph algorithms
subject: Mathematics of computing → Graph coloring
subject: Mathematics of computing → Graphs and surfaces
subject: Mathematics of computing → Graph theory
subject: Mathematics of computing → Hypergraphs
subject: Mathematics of computing → Information theory
subject: Mathematics of computing → Network flows
subject: Mathematics of computing → Paths and connectivity problems
subject: Mathematics of computing → Probabilistic algorithms
subject: Mathematics of computing → Random graphs
subject: Mathematics of computing → Solvers
subject: Mathematics of computing → Trees
subject: Networks → Network algorithms
subject: Theory of computation → Algorithmic game theory and mechanism design
subject: Theory of computation → Approximation algorithms analysis
subject: Theory of computation → Computational geometry
subject: Theory of computation → Data structures design and analysis
subject: Theory of computation → Design and analysis of algorithms
subject: Theory of computation → Online algorithms
subject: Theory of computation → Distributed algorithms
subject: Theory of computation → Dynamic graph algorithms
subject: Theory of computation → Fixed parameter tractability
subject: Theory of computation → Graph algorithms analysis
subject: Theory of computation → Network flows
subject: Theory of computation → Packing and covering problems
subject: Theory of computation → Parallel algorithms
subject: Theory of computation → Parallel computing models
subject: Theory of computation → Parameterized complexity and exact algorithms
subject: Theory of computation → Pattern matching
subject: Theory of computation → Problems, reductions and completeness
subject: Theory of computation → Randomness, geometry and discrete structures
subject: Theory of computation → Routing and network design problems
subject: Theory of computation → Scheduling algorithms
subject: Theory of computation → Shared memory algorithms
subject: Theory of computation → Shortest paths
subject: Theory of computation → Sorting and searching
subject: Theory of computation → Stochastic approximation

description: Front Matter, Table of Contents, Preface, Conference Organization
description: LIPIcs, Vol. 173, 28th Annual European Symposium on Algorithms (ESA 2020), pages 0:i-0:xx
Effective medium model for a suspension of active swimmers
Creators: name: Dhar, Abyaya
name: Burada, P. S.
name: Sekhar, G. P. Raja
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Several active organisms in nature tend to reside as a community in a viscous fluid medium. We analyze the variation of swimming characteristics of an active swimmer present in a dilute and disperse suspension, modeled as an effective Brinkman medium. This idealized representation of a collection of active swimmers allows one to distinguish the impact of the interior domain available to an individual swimmer as well as the contribution of its neighbors. Darcy's law along with the analytical solution enables the effective resistivity to be predicted as a function of the volume fraction which is in close agreement with the well-known Carman-Kozeny equation. This facilitates the successive analysis of the propulsion speed, power dissipation, and swimming efficiency of the targeted swimmer as a function of the volume fraction which is decisive in nutrient transport and uptake or reproduction in a collective environment. A stress-jump condition is also imposed across a cell to indicate a mean effective force due to the nearby swimmers. At suitable values of this stress-jump coefficient, the relative increase of the migration velocity and swimming efficiency is noticeably higher at an optimum occupancy.
A systematic approach to distributing public investment to increase timber supplies in British Columbia
Creators: name: Gasson, Robert
Publisher: name: University of British Columbia
Year: 2010

description: Within the recently introduced timber supply policy in British Columbia there is an emphasis on at least maintaining short-term harvest rates. This imposes constraints on the type of investments that need to be undertaken. A system has been devised that will identify and characterize the contribution of proposed investments to public timber supply goals. A stand can be harvested without financial loss only when the mill-gate value of the stand volume exceeds, or just balances, the costs of extraction and delivery to the mill. The stumpage appraisal system of the Forest Service can be. used to estimate. minimum average stem volumes for operability over a wide range of stand and accessibility conditions. Strategic timber supply analysis can provide a time-frame within which the benefits of investment in silviculture must be realized to ensure continuity of supply. This time-frame, in combination with the operability-accessibility relationships, is used to erect zones for investment within the forest estate. Within any zone, at a given radius from the mill, all stands will have similar characteristics for operability. Stands unlikely to reach these characteristics within the time-frame are candidates for investment. Among candidate stands there will be a great variability in the prospective efficiency of investment. An investment efficiency ratio, based on physical units of production, is provided to characterize potential investments. Rules for its use as a criterion within the field of public forest management have been developed. With this criterion annual activity budgets can be assembled and operational plans instituted. The proposed system is offered as a replacement for the existing process by which stand treatment guidelines are drawn up and investments undertaken by the provincial Forest Service. It provides an explicit link between timber supply policy and silvicultural planning currently lacking. Its consistent use will lead to a more rational distribution of resources within the framework of supply planning. It is expected that the system will eventually be superseded by improvements in the data base used in strategic supply planning.
The Limits of Multi-task Peer Prediction
Creators: name: Zheng, Shuran
name: Yu, Fang-Yi
name: Chen, Yiling
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Theoretical Economics (econ.TH)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: Recent advances in multi-task peer prediction have greatly expanded our knowledge about the power of multi-task peer prediction mechanisms. Various mechanisms have been proposed in different settings to elicit different types of information. But we still lack understanding about when desirable mechanisms will exist for a multi-task peer prediction problem. In this work, we study the elicitability of multi-task peer prediction problems. We consider a designer who has certain knowledge about the underlying information structure and wants to elicit certain information from a group of participants. Our goal is to infer the possibility of having a desirable mechanism based on the primitives of the problem. Our contribution is twofold. First, we provide a characterization of the elicitable multi-task peer prediction problems, assuming that the designer only uses scoring mechanisms. Scoring mechanisms are the mechanisms that reward participants' reports for different tasks separately. The characterization uses a geometric approach based on the power diagram characterization in the single-task setting ([Lambert and Shoham, 2009, Frongillo and Witkowski, 2017]). For general mechanisms, we also give a necessary condition for a multi-task problem to be elicitable. Second, we consider the case when the designer aims to elicit some properties that are linear in the participant's posterior about the state of the world. We first show that in some cases, the designer basically can only elicit the posterior itself. We then look into the case when the designer aims to elicit the participants' posteriors. We give a necessary condition for the posterior to be elicitable. This condition implies that the mechanisms proposed by Kong and Schoenebeck are already the best we can hope for in their setting, in the sense that their mechanisms can solve any problem instance that can possibly be elicitable.
PHotometry Assisted Spectral Extraction (PHASE) and identification of SNLS supernovae
Creators: name: Baumont, S.
name: Balland, C.
name: Astier, P.
name: Guy, J.
name: Hardin, D.
name: Howell, D. A.
name: Lidman, C.
name: Mouchet, M.
name: Pain, R.
name: Regnault, N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aim: We present new extraction and identification techniques for supernova (SN) spectra developed within the Supernova Legacy Survey (SNLS) collaboration. Method: The new spectral extraction method takes full advantage of photometric information from the Canada-France-Hawai telescope (CFHT) discovery and reference images by tracing the exact position of the supernova and the host signals on the spectrogram. When present, the host spatial profile is measured on deep multi-band reference images and is used to model the host contribution to the full (supernova + host) signal. The supernova is modelled as a Gaussian function of width equal to the seeing. A chi-square minimisation provides the flux of each component in each pixel of the 2D spectrogram. For a host-supernova separation greater than
description: 27 pages, 18 Figures, 1 Table. Accepted for publication in A&A
Zwischen den Stühlen.
Creators: name: Schreger, Christian
Publisher: name: Medienimpulse
Year: 2019

description: Der Beitrag präsentiert fünf medienpädagogische Projekte, die in den letzten Jahren im Wiener 15. Bezirk (Rudolfsheim-Fünfhaus) in einer Volksschule geplant und umgesetzt wurden. Dabei wurden insgesamt 5 Schwerpunkte (Wald & Wiese / Fluss & Au /Hand, Werk & Co / imKreis und Heimat) gesetzt und unter Einsatz verschiedenster Medien gemeinsam mit den Kindern durchgearbeitet. Christian Schreger berichtet eingehend von jedem einzelnen Projektund verweist abschließend auch auf die notwendigen Produktionsbedingungen und Kontexte der medienpädagogischen Projektarbeit.
description: Medienimpulse, Bd. 57 Nr. 4 (2019): 4/2019 - Emotionen (in) der Medienbildung
TOPOLOGIK FAZO VA UNI KIRITISHGA DOIR MISOLLAR. OCHIQ VA YOPIQ TO'PLAMLAR
Creators: name: Zahiriddinova, Shahlo
name: Bozarova, Gulira'no
Publisher: name: Zenodo
Year: 2025

description: Ushbu maqola topologiya va geometriya sohalari o'rtasidagi o'zaro aloqalarni tahlil qiladi. Topologiya fazolarini o'rganish, to'plamlar orasidagi munosabatlarni aniqlash va ularning ochiq yoki yopiq bo'lishi kabi xususiyatlarni tahlil etadi. Geometriya esa, asosan, o'lchovlar, masofalar va burchaklar bilan bog'liq bo'lib, fazolarni o'lchash va shaklini aniqlashga qaratilgan. Maqolada bu ikki sohaning bir-birini to'ldiruvchi xususiyatlari, shuningdek, topologik va geometrik embedding tushunchalari orqali ularning o'zaro aloqalari ko'rib chiqiladi.
Bound on four-dimensional Planck mass
Creators: name: Calmet, Xavier
name: Feliciangeli, Marco
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this note we derive a bound using data from cosmic rays physics on a model recently proposed to solve the hierarchy problem by lowering the Planck scale to the TeV region without the introduction of extra-dimensions. We show that the non observation of small black holes by AGASA implies a model independent limit for the four-dimensional reduced Planck mass of roughly 488 GeV.
description: 5 pages
Molecules with ALMA at Planet-forming Scales (MAPS) XIII: HCO$^+$ and disk ionization structure
Creators: name: Aikawa, Yuri
name: Cataldi, Gianni
name: Yamato, Yoshihide
name: Zhang, Ke
name: Booth, Alice S.
name: Furuya, Kenji
name: Andrews, Sean M.
name: Bae, Jaehan
name: Bergin, Edwin A.
name: Bergner, Jennifer B.
name: Bosman, Arthur D.
name: Cleeves, L. Ilsedore
name: Czekala, Ian
name: Guzmán, Viviana V.
name: Huang, Jane
name: Ilee, John D.
name: Law, Charles J.
name: Gal, Romane Le
name: Loomis, Ryan A.
name: Ménard, Francois
name: Nomura, Hideko
name: Öberg, Karin I.
name: Qi, Chunhua
name: Schwarz, Kamber R.
name: Teague, Richard
name: Tsukagoshi, Takashi
name: Walsh, Catherine
name: Wilner, David J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We observed HCO$^+$ $J=1-0$ and H$^{13}$CO$^+$ $J=1-0$ emission towards the five protoplanetary disks around IM Lup, GM Aur, AS 209, HD 163296, and MWC 480 as part of the MAPS project. HCO$^+$ is detected and mapped at 0.3\arcsec\,resolution in all five disks, while H$^{13}$CO$^+$ is detected (SNR$>6 σ$) towards GM Aur and HD 163296 and tentatively detected (SNR$>3 σ$) towards the other disks by a matched filter analysis. Inside a radius of $R\sim 100$ au, the HCO$^+$ column density is flat or shows a central dip. At outer radii ($\gtrsim 100$ au), the HCO$^+$ column density decreases outwards, while the column density ratio of HCO$^+$/CO is mostly in the range of $\sim 10^{-5}-10^{-4}$. We derived the HCO$^+$ abundance in the warm CO-rich layer, where HCO$^+$ is expected to be the dominant molecular ion. At $R\gtrsim 100$ au, the HCO$^+$ abundance is $\sim 3 \times 10^{-11} - 3\times 10^{-10}$, which is consistent with a template disk model with X-ray ionization. At the smaller radii, the abundance decreases inwards, which indicates that the ionization degree is lower in denser gas, especially inside the CO snow line, where the CO-rich layer is in the midplane. Comparison of template disk models with the column densities of HCO$^+$, N$_2$H$^+$, and N$_2$D$^+$ indicates that the midplane ionization rate is $\gtrsim 10^{-18}$ s$^{-1}$ for the disks around IM Lup, AS 209, and HD 163296. We also find hints of an increased HCO$^+$ abundance around the location of dust continuum gaps in AS 209, HD 163296, and MWC 480. This paper is part of the MAPS special issue of the Astrophysical Journal Supplement.
description: accepted to ApJS, 33 pages, 20 figures
Euclidean Quantum Mechanics and Universal Nonlinear Filtering
Creators: name: Balaji, Bhashyam
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: An important problem in applied science is the continuous nonlinear filtering problem, i.e., the estimation of a Langevin state that is observed indirectly. In this paper, it is shown that Euclidean quantum mechanics is closely related to the continuous nonlinear filtering problem. The key is the configuration space Feynman path integral representation of the fundamental solution of a Fokker-Planck type of equation termed the Yau Equation of continuous-continuous filtering. A corollary is the equivalence between nonlinear filtering problem and a time-varying Schrödinger equation.
description: 19 pages, LaTeX, interdisciplinary
Evaluation of cosmological models in $f(R, T)$ gravity in different dark energy scenario
Creators: name: Bhardwaj, Vinod Kumar
name: Pradhan, Anirudh
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In present paper, we search the existence of dark energy scalar field models within in $f(R, T)$ gravity theory established by Harko et al. (Phys. Rev. D 84, 024020, 2011) in a flat FRW universe. The correspondence between scalar field models have been examined by employing new generalized dynamical cosmological term $ Λ(t) $. In this regards, the best fit observational values of parameters from three distinct sets data are applied. To decide the solution to field equations, a scale factor $ a= \left(\sinh(βt)\right)^{1/n} $ has been considered, where $ β$ \& $n $ are constants. Here, we employ the recent ensues ($H_{0}=69.2$ and $q_{0}=-0.52)$ from (OHD+JLA) observation (Yu et al., Astrophys. J. 856, 3, 2018). Through the numerical estimation and graphical assessing of various cosmological parameters, it has been experienced that findings are comparable with kinematics and physical properties of universe and compatible with recent cosmological ensues. The dynamics and potentials of scalar fields are clarified in FRW scenario in the present model. Potentials reconstruction is highly reasonable and shows a periodic establishment and in agreement with latest observations.
description: 20 pages, 16 figures
Scaling TensorFlow to 300 million predictions per second
Creators: name: Hartman, Jan
name: Kopič, Davorin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: We present the process of transitioning machine learning models to the TensorFlow framework at a large scale in an online advertising ecosystem. In this talk we address the key challenges we faced and describe how we successfully tackled them; notably, implementing the models in TF and serving them efficiently with low latency using various optimization techniques.
title: Ergebnisse aus Langzeitstudien zu Gefahrstoffbelastungen im Tunnelbau
Creators: name: Müller, Henning
name: Weiß, Dietrich
Publisher: name: Bauhaus-Universität Weimar
Year: 2001
Subjects: subject: Arbeitsschutz
subject: Baustelle
subject: Gefahrstoff
subject: Messung
subject: Emissionsüberwachung
subject: Dieselmotor
subject: 620

description: Die Mineure sind beim Tunnelbau trotz moderner Technik vielfältigen Beanspruchungen und Belastungen ausgesetzt. Deshalb wurden Tunnelbaumaßnahmen mestechnisch begleitet, um die Gefahrstoffbelastung festzustellen. Während die Belastung mit Feinstaub durch das moderne Nassspritzverfahren beim Betonspritzen stabil unter den MAK-Wert gedrückt werden kann, erfordert die Einhaltung des TRK-Wertes für DME beim Schuttern zusätzliche lüftungstechnische Maßnahmen.
description: 2. Fachtagung Sicherheit auf Baustellen: mit einem Spezialteil von Beiträgen zu Qualität und Sicherheit auf Baustellen und im Schweißbetrieb ; anlässlich des Ausscheidens von Herrn Prof. Dr.-Ing. habil. Karl-Dieter Röbenack aus dem aktiven Berufsleben, p. 41
description: Schriften der Professur Baubetrieb und Bauverfahren, vol. 3, 2001, p. 41
Hypertexte im Deutschunterricht.
Creators: name: Zolles, Christian
name: Hübel, Thomas
Publisher: name: Medienimpulse
Year: 2019

description: Thomas Hübel und Christian Zolles haben sich die Mühe gemacht, das Thema Hypertext eingehend zu untersuchen und so aufzubereiten, dass sie mit diesem Beitrag eine breit aufgestellte medienpädagogische Handreichung zum Thema präsentieren können, die nur darauf wartet, in der konkreten Unterrichtspraxis angewendet zu werden. Dabei werden Unterrichtsinputs genauso präsentiert wie thematische Informationen, Übungen und (weitere) Literaturangaben, die alle dazu gemacht sind, das Thema für Lehrende und Lernende gleichermaßen attraktiv zu gestalten. Auch einige Visualisierungen wurden bereits eingebaut und können daher gleich heruntergeladen werden …
description: Medienimpulse, Bd. 57 Nr. 4 (2019): 4/2019 - Emotionen (in) der Medienbildung
Fast estimation of propagation constants in crossed gratings
Creators: name: Faghihifar, Ehsan
name: Akbari, Mahmood
name: Nekuee, Seyed Amir Hossein
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Fourier-based modal methods are among the most effective numerical tools for the accurate analysis of crossed gratings. However, leading to computationally expensive eigenvalue equations significantly restricts their applicability, particularly when large truncation orders are required. The resultant eigenvalues are the longitudinal propagation constants of the grating and play a key role in applying the boundary conditions, as well as in the convergence and stability analyses. This paper aims to propose simple techniques for the fast estimation of propagation constants in crossed gratings, predominantly with no need to solve an eigenvalue equation. In particular, we show that for regular optical gratings comprised of lossless dielectrics, nearly every propagation constant appears on the main diagonal of the modal matrix.
description: 11 pages, 8 figures
Exchange of high and low energy photons in ultraperipheral relativistic heavy-ion collisions
Creators: name: Baur, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Ultraperipheral collisions at collider energies are a useful tool to study photon-hadron (proton/nucleus) and photon-photon interactions in a hitherto unexplored energy regime. Theoretical tools to study these processes are briefly described. Some current results and problems are discussed
description: 5 pages, 2 figures. Talk given at the Workshop on 'High-energy photon collisions at the LHC', April 22-25,2008, CERN, Switzerland. To be published in Nucl. Phys. B (Proceedings Supplements)
Rückblick: Woche der Medienkompetenz 2019
Creators: name: Kaindel, Christoph
Publisher: name: Medienimpulse
Year: 2019

description: Mediamanual hat in diesem Jahr zum dritten Mal zu einer Teilnahme an der „Woche der Medienkompetenz” aufgerufen, diesmal fand die Aktionswoche vom 20. bis 28. Oktober statt und ist mittlerweile eine bekannte Marke geworden. Auf vielen Webseiten medienpädagogischer Einrichtungen wird auf die Woche der Medienkompetenz hingewiesen, viele Anbieter sind mit ihren Angeboten bereits das dritte Jahr dabei.
description: Medienimpulse, Bd. 57 Nr. 4 (2019): 4/2019 - Emotionen (in) der Medienbildung
Österreichische Literatur 2018. Eine Auswahlbibliografie zur Literaturkritik österreichischer Gegenwartsliteratur.
Creators: name: Ballhausen, Thomas
name: Wessely, Winfried
name: Schmidt, Sabrina
name: Huez, Robert
Publisher: name: Medienimpulse
Year: 2020

description: Die vorliegende Auswahlbibliografie zur Literaturkritik österreichischer Gegenwartsliteratur 2018 ermöglicht einen Einblick in wichtige Rezensionen aus den Beständen der Pressedokumentation der Dokumentationsstelle für neuere österreichische Literatur/Literaturhaus Wien. Die zentralen Ansätze der Auswahlbibliografie sind die Vermittlung eines thematischen Überblicks, die Dokumentation der Wertung innerhalb der ausgewählten Rezensionen und die vereinfachte Zugänglichmachung zu zentralen Quellen literarischer Rezeption.
description: Medienimpulse, Bd. 57 Nr. 4 (2019): 4/2019 - Emotionen (in) der Medienbildung
Regulators’ Irrational Rationality and Bankers’ Rational Irrationality
Creators: name: Umlauft, Thomas S.
Publisher: name: Austrian Journal of Historical Studies
Year: 2015

description: Banks and other financial institutions which were „too-big- to-fail“ (TBTF) played a central role in the Global Financial Crisis of 2007– 2009. The article lays out how misguided policies enabled banks to grow both in size as well as in complexity and therefore acquire TBTF status, particularly in the 10-year period preceding the crisis. The article then proceeds by detailing how an ill-designed policy framework, relying on supposed market approaches to regulation – including self-regulation and credit rating agencies – enabled TBTF financial institutions to game the system. They were thereby able to exploit the negative externalities which the flawed policy framework – in connection with TBTF status – had granted to large, systemically important financial institutions. The article therefore identifies defective government policies as the chief cause of the financial crisis of 2007–2009, revealing an urgent need for financial sector reform.
description: Austrian Journal of Historical Studies, Bd. 26 Nr. 1 (2015): Geld Markt Akteure
A classification system for coastal zone management as applied to the Capital Regional District, British Columbia
Creators: name: Hardy, Ruth Ellen
Publisher: name: University of British Columbia
Year: 2010

description: Issues related to resource allocation and ecosystem management are becoming of increasing concern to Regional Districts in the coastal zone of south western British Columbia. An approach to land use planning and management of the coastal zone is developed in response to this concern. It combines a landscape analysis with classification of the coastal zone into management categories. Management guidelines within which local communities can plan for growth and protect and maintain the coastal ecological resources are developed. The approach is simple and adaptable to various situations and types of available information. The approach is developed through a literature review of coastal zone management programs and landscape analyses, and then applied in a case study of the Saanich Peninsula. The approach evaluates homogeneous biophysical mapping units for their attractiveness and vulnerability to particular uses. The homogeneous units are determined by a resource classification which divides the coastal zone into Regions, then Districts, Sections and finally Types at the most detailed level. At the Section level two major parallel subzones are delineated - upland and shore. The attractiveness and vulnerability evaluations, which are specific to a subzone, are calculated through a mathematical linear combination method which sums weighted ratings of relevant biophysical features and processes. The concepts of the different management categories follow from the attractiveness and vulnerability evaluations. Units with high attractiveness for use, and low vulnerability to the use, are assigned to a management category which encourages high intensity uses (i.e. industrial and commercial use). At the other extreme, areas with high vulnerability (i.e. high values and low tolerance to use) are assigned to a category which restricts most uses. The case study in the Saanich Peninsula, British Columbia, demonstrates the utility of the approach. Areas of potential for growth and environmental value are effectively identified. Models were kept simple to minimize biases resulting from interdependent factors. The approach analyzes the supply of natural resources, and suggests management policies. Used in conjunction with demand analyses and public participation processes it is a valuable tool for resolving resource allocation issues in the coastal zone.
In memoriam Markus Cerman (1967–2015)
Creators: name: Ehmer, Josef
name: Landsteiner, Erich
Publisher: name: Österreichische Zeitschrift für Geschichtswissenschaften
Year: 2015

description: Österreichische Zeitschrift für Geschichtswissenschaften, Bd. 26 Nr. 3 (2015): Philantropie und Sozialstaat
title: Staubbelastung an Arbeitsplätzen in Bauschuttaufbereitungsanlagen
Creators: name: Peter, Lutz
name: Kiewitt, Walter
Publisher: name: Bauhaus-Universität Weimar
Year: 2001
Subjects: subject: Arbeitsschutz
subject: Baustelle
subject: Bauschutt
subject: Gefahrstoff
subject: Messung
subject: 620

description: Technologischer Ablauf in einer Bauschuttaufbereitungsanlage; Gefährdungen und Belastungen bei der Bauschuttaufbereitung, Schwerpunktaktion zur messtechnischen Aufklärung der Staubbelastung der Beschäftigten bei der Bauschuttaufbereitung, Durchführung der Messungen, Auswertung. Die dargestellten Untersuchungsergebnisse belegen, dass durch gezielte Maßnahmen die Staubkonzentrationen unter die vom Gesetzgeber vorgegebenen Grenzwerte gesenkt werden können. Bauschuttaufbereitungsanlagen ohne jegliche Einrichtungen zur Staubminimierung sind aus der Sicht des Arbeitsschutzes nicht tolerierbar.
description: 2. Fachtagung Sicherheit auf Baustellen: mit einem Spezialteil von Beiträgen zu Qualität und Sicherheit auf Baustellen und im Schweißbetrieb ; anlässlich des Ausscheidens von Herrn Prof. Dr.-Ing. habil. Karl-Dieter Röbenack aus dem aktiven Berufsleben, p. 33
description: Schriften der Professur Baubetrieb und Bauverfahren, vol. 3, 2001, p. 33
Electronic structure and effects of dynamical electron correlation in ferromagnetic bcc-Fe, fcc-Ni and antiferromagnetic NiO
Creators: name: Miura, Oki
name: Fujiwara, Takeo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: LDA+DMFT method in the framework of the iterative perturbation theory (IPT) with full LDA Hamiltonian without mapping onto the effective Wannier orbitals. We then apply this LDA+DMFT method to ferromagnetic bcc-Fe and fcc-Ni as a test of transition metal, and to antiferromagnetic NiO as an example of transition metal oxide. In Fe and Ni, the width of occupied 3d bands is narrower than those in LDA and Ni 6eV satellite appears. In NiO, the resultant electronic structure is of charge-transfer insulator type and the band gap is 4.3eV. These results are in good agreement with the experimental XPS. The configuration mixing and dynamical correlation effects play a crucial role in these results.
TRIS III: the diffuse galactic radio emission at $δ=+42^{\circ}$
Creators: name: Tartari, A.
name: Zannoni, M.
name: Gervasi, M.
name: Boella, G.
name: Sironi, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present values of temperature and spectral index of the galactic diffuse radiation measured at 600 and 820 MHz along a 24 hours right ascension circle at declination $δ= +42^{\circ}$. They have been obtained from a subset of absolute measurements of the sky temperature made with TRIS, an experiment devoted to the measurement of the Cosmic Microwave Background temperature at decimetric-wavelengths with an angular resolution of about $20^{\circ}$. Our analysis confirms the preexisting picture of the galactic diffuse emission at decimetric wavelength and improves the accuracy of the measurable quantities. In particular, the signal coming from the halo has a spectral index in the range $2.9-3.1$ above 600 MHz, depending on the sky position. In the disk, at TRIS angular resolution, the free-free emission accounts for the 11% of the overall signal at 600 MHz and 21% at 1420 MHz. The polarized component of the galactic emission, evaluated from the survey by Brouw and Spoelstra, affects the observations at TRIS angular resolution by less than 3% at 820 MHz and less than 2% at 600 MHz. Within the uncertainties, our determination of the galactic spectral index is practically unaffected by the correction for polarization. Since the overall error budget of the sky temperatures measured by TRIS at 600 MHz, that is 66 mK(systematic)$+$18 mK (statistical), is definitely smaller than those reported in previous measurements at the same frequency, our data have been used to discuss the zero levels of the sky maps at 150, 408, 820 and 1420 MHz in literature. Concerning the 408 MHz survey, limiting our attention to the patch of sky corresponding to the region observed by TRIS, we suggest a correction of the base-level of $(+3.9\pm 0.6)$K.
description: Accepted for publication in the Astrophysical Journal
Eine Ästhetik der Unschärfe
Creators: name: Kö, Georg
Publisher: name: Österreichische Zeitschrift für Geschichtswissenschaften
Year: 2016

description: The photographer Hiroshi Sugimoto decided once to push his camera’s focal length to twice-infinity while shooting urban landscapes. He interpreted the resulting blur as an erosion-test of modernity that would only be survived by the super large buildings of architectural landmarks. His related series “Architectures” serves as the analytical a erimage for reflecting on Jacques Rancière’s concept of the Distribution of the Sensible and his aesthetic-political thought. This article discusses key elements of his theory in opposition to Sugimotos very own visual interface between politics and aesthetics, exposing a problematic and romantic lack of technicality and mediality in Rancière’s tableau of visual regimes. Serving also as a retrospective on what has been an ongoing conversation with Siegfried Mattl about Jacques Rancière, aesthetics, cinema, photography, romanticism and liberty this text remains necessarily indecisive since the colloquist has sadly passed away recently.
description: Österreichische Zeitschrift für Geschichtswissenschaften, Bd. 27 Nr. 1 (2016): Apropos Rancière
Blowing up Feynman integrals
Creators: name: Bogner, Christian
name: Weinzierl, Stefan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this talk we discuss sector decomposition. This is a method to disentangle overlapping singularities through a sequence of blow-ups. We report on an open-source implementation of this algorithm to compute numerically the Laurent expansion of divergent multi-loop integrals. We also show how this method can be used to prove a theorem which relates the coefficients of the Laurent series of dimensionally regulated multi-loop integrals to periods.
description: 6 pages, talk given at the conference "Loops and Legs in Quantum Field Theory", Sondershausen, April 2008