cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Medienarbeit in der Integrativen Lernwerkstatt Brigittenau
Creators: name: Mildner (Sontag), Katharina
Publisher: name: Medienimpulse
Year: 2014

description: Die LehrerInnen an der Integrativen Lernwerkstatt Brigittenau, Rudi Schwarzenberger und Ingrid Passweg, geben Katharina Sontag in einem Gespräch Einblick in den Schulalltag und den darin vorkommenden Einsatz von Medien. Dabei kommt speziell die Einbindung des Theaters im pädagogischen Kontext in den Blick. Bei den beiden Interviewpartnern Rudi Schwarzenberger und Ingrid Passweg handelt es sich um ein eingespieltes Team: Beide sind bereits seit über zehn Jahren als Lehrpersonen tätig, davon arbeiten sie bereits geraume Zeit miteinander in den Mehrstufenklassen der Integrativen Lernwerkstatt Brigittenau (ILB).
description: Medienimpulse, Bd. 52 Nr. 2 (2014): 2/2014 - Potenziale digitaler Medienkunst
Stichwort Medienkompetenz: Tipps für komplexe Lernaufgaben am Beispiel Bildbearbeitung
Creators: name: Winterstein, Nicole
Publisher: name: Medienimpulse
Year: 2014

description: Medienimpulse, Bd. 52 Nr. 2 (2014): 2/2014 - Potenziale digitaler Medienkunst
Role of the Mean-field in Bloch Oscillations of a Bose-Einstein Condensate in an Optical Lattice and Harmonic Trap
Creators: name: Zhang, R.
name: Sapiro, R. E.
name: Mhaskar, R. R.
name: Raithel, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Using the Crank-Nicholson method, we study the evolution of a Bose-Einstein condensate in an optical lattice and harmonic trap. The condensate is excited by displacing it from the center of the harmonic trap. The mean field plays an important role in the Bloch-like oscillations that occur after sufficiently large initial displacement. We find that a moderate mean field significantly suppresses the dispersion of the condensate in momentum space. When the mean field becomes large, soliton and vortex structures appear in the condensate wavefunction.
description: BEC simulation, 7 figures
Krieg der Bilder
Creators: name: Ballhausen, Thomas
Publisher: name: Medienimpulse
Year: 2014

description: Schon in der Frühzeit des Films machten sich die Verantwortlichen und Produzenten Gedanken, wie Material dauerhaft bewahrt, sinnvoll archiviert und wieder zugänglich gemacht werden könnte: Der Wunsch nach der adäquaten Sicherung, Lagerung und weiteren Bearbeitung unter Achtung der dualen Verantwortlichkeit gegenüber den Beständen als auch der Öffentlichkeit – der Kernaufgaben eines jeden Archivs – ist bereits für das späte 19. Jahrhundert dokumentiert. Für eine zeitgemäße Erleichterung im seriösen Materialzugriff bieten wissenschaftliche Editionen und das Internet hervorragende Voraussetzungen. Insbesondere am Beispiel der österreichischen Filmquellen zum Ersten Weltkrieg lassen sich die Vorzüge beider Vermittlungsoptionen verdeutlichen.
description: Medienimpulse, Bd. 52 Nr. 2 (2014): 2/2014 - Potenziale digitaler Medienkunst
Impact of Parallel Gating on Gate Fidelities in Linear, Square, and Star Arrays of Noisy Flip-Flop Qubits
Creators: name: De Michielis, Marco
name: Ferraro, Elena
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Successfully implementing a quantum algorithm involves maintaining a low logical error rate by ensuring the validity of the quantum fault-tolerance theorem. The required number of physical qubits arranged in an array depends on the chosen Quantum Error Correction code and the achievable physical qubit error rate. As the qubit count in the array increases, parallel gating - simultaneously manipulating many qubits - becomes a crucial ingredient for successful computation. In this study, small arrays of a type of donor- and quantum dot-based qubits, known as flip-flop qubits, are investigated. Simulation results of gate fidelities in linear, square and star arrays of four flip-flop qubits affected by realistic 1/f noise are presented to study the effect of parallel gating. The impact of two, three and four parallel one-qubit gates, as well as two parallel two-qubit gates, on fidelity is calculated by comparing different array geometries. Our findings can contribute to the optimized manipulation of small flip-flop qubit arrays and the design of larger ones.
description: 12 pages, 8 figures
Global Existence Results for the Anisotropic Boussinesq System in Dimension Two
Creators: name: Danchin, Raphaël
name: Paicu, Marius
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study the global existence issue for the two-dimensional Boussinesq system with horizontal viscosity in only one equation. We first examine the case where the Navier-Stokes equation with no vertical viscosity is coupled with a transport equation. Second, we consider a coupling between the classical two-dimensional incompressible Euler equation and a transportdiffusion equation with diffusion in the horizontal direction only. For the both systems and for arbitrarily large data, we construct global weak solutions `a la Leray. Next, we state global wellposedness results for more regular data. Our results strongly rely on the fact that the diffusion occurs in a direction perpendicular to the buoyancy force.
Ectoedemia (Ectoedemia) liechtensteini
Creators: name: van Nieukerken, Erik
name: Laštůvka, Aleš
name: Laštůvka, Zdeněk
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Nepticulidae
Ectoedemia
Ectoedemia liechtensteini

description: Ectoedemia (Ectoedemia) liechtensteini (Zimmermann) Biology. Hostplant: Quercus cerris L., occasionally on Quercus pubescens Willd., Q. petraea (Matt.) Liebl. Larvae found in October and November; adults fly from (April, reared) May to June. Distribution. Slovakia: Patočka 1980. Remarks. The status of this species is not yet settled: adults are inseparable from E. heringi and phyllotomella. Molecular studies are currently in progress.
description: Published as part of van Nieukerken, Erik, Laštůvka, Aleš & Laštůvka, Zdeněk, 2010, Western Palaearctic Ectoedemia (Zimmermannia) Hering and Ectoedemia Busck s. str. (Lepidoptera: Nepticulidae): five new species and new data on distribution, hostplants and recognition, pp. 1-82 in ZooKeys 32 (32) on page 63, DOI: 10.3897/zookeys.32.282, http://zenodo.org/record/576594
description: {"references": ["Patocka J (1980) Prispevek k faunistice Lepidopter Slovenska nadceledi Nepticuloidea, Incurvarioidea e Tineoidea. Zpravy Ceskoslovenske Spolecnosti Entomologicke pri CSAV 16: 135 - 147."]}
Gesellschaftsraum MMORPG. Eine Studie über die Community in Massively Multiplayer Online Role-Playing Games
Creators: name: Stingeder, Karl H.
Publisher: name: Medienimpulse
Year: 2014

description: Mit dem Aufstieg digitaler Netzwerke etablieren sich Onlinespiele-Com­munitys in Online-Games und virtuellen Welten. Es bilden sich Gemeinschaften und soziale Bindungen, die oft nach Niedergang eines Spiels fortbestehen und rund um andere Online-Spiele weiterleben. Theinschnacks Studie ist der Erforschung der Frage gewidmet, wie sich soziale Netzwerke in Online-Spielgemeinschaften bilden und welche Charakterzüge diese "Gesellschaften" aufweisen.
description: Medienimpulse, Bd. 52 Nr. 2 (2014): 2/2014 - Potenziale digitaler Medienkunst
Closure to the PRISM equation derived from nonlinear response theory
Creators: name: Donley, James P.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Nonlinear response theory is employed to derive a closure to the polymer reference interaction site model (PRISM) equation. The closure applies to a liquid of neutral polymers at melt densities. It can be considered a molecular generalization of the mean spherical approximation (MSA) closure of Lebowitz and Percus to the atomic Ornstein-Zernike (OZ) equation, and is similar in some aspects to the reference "molecular" MSA (R-MMSA) closure of Schweizer and Yethiraj to PRISM. For a model binary blend of freely-jointed chains, the new closure predicts an unmixing critical temperature, Tc, via the susceptibility route that scales linearly with molecular weight, N, in agreement with Flory theory. Predictions for Tc of the new closure differ greatest from those of the R-MMSA at intermediate N, the latter being about 40% higher than the former there, but at large N both theories give about the same values. For an isotopic blend of polyethylene, the new and R-MMSA closures predict a Tc about 25% higher than the experimental value, which is only moderately less accurate than the prediction of atomic OZ-MSA theory for Tc of methane. In this way, the derivation and its consequences help to identify the ingredients in a theory needed to model properly the equilibrium properties of a polymeric liquid at both short and long lengthscales.
description: 13 pages, 5 figures
On the Influence of Carrier Frequency Offset and Sampling Frequency Offset in MIMO-OFDM Systems for Future Digital TV
Creators: name: Nasser, Youssef
name: Hélard, Jean-François
name: Crussière, Matthieu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: This paper investigates the impact of carrier frequency offset (CFO) and sampling frequency offset (SFO) on the performance of different MIMO-OFDM schemes with high spectral efficiency for next generation of terrestrial digital TV. We analyze particularly orthogonal Alamouti scheme, and non-orthogonal (NO) schemes like VBLAST, linear dispersion (LD) code and Golden code. This analysis gives a global view on the best suitable MIMO-OFDM scheme with respect to CFO and SFO. We show that for high spectral efficiency, Alamouti is more sensitive to CFO and SFO. Moreover, we show that all studied MIMO-OFDM schemes are sensitive to CFO when it is greater than 1% of inter-carrier spacing. Their sensitivity due to SFO is less than that due to CFO.
Watermarking Recommender Systems
Creators: name: Zhang, Sixiao
name: Long, Cheng
name: Yuan, Wei
name: Chen, Hongxu
name: Yin, Hongzhi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Retrieval (cs.IR)
subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recommender systems embody significant commercial value and represent crucial intellectual property. However, the integrity of these systems is constantly challenged by malicious actors seeking to steal their underlying models. Safeguarding against such threats is paramount to upholding the rights and interests of the model owner. While model watermarking has emerged as a potent defense mechanism in various domains, its direct application to recommender systems remains unexplored and non-trivial. In this paper, we address this gap by introducing Autoregressive Out-of-distribution Watermarking (AOW), a novel technique tailored specifically for recommender systems. Our approach entails selecting an initial item and querying it through the oracle model, followed by the selection of subsequent items with small prediction scores. This iterative process generates a watermark sequence autoregressively, which is then ingrained into the model's memory through training. To assess the efficacy of the watermark, the model is tasked with predicting the subsequent item given a truncated watermark sequence. Through extensive experimentation and analysis, we demonstrate the superior performance and robust properties of AOW. Notably, our watermarking technique exhibits high-confidence extraction capabilities and maintains effectiveness even in the face of distillation and fine-tuning processes.
Application of Homogenization Theory to the Flow Over and Through Micro-Structured, Porous and Elastic Surfaces
Creators: name: NAQVI, SAHRISH BATOOL
Publisher: name: Universit� degli studi di Genova
Year: 2021

description: This research is aimed to develop a homogenized model for practical applications of the fluid flow over and through the microstructured surfaces, which prescribed reliable estimates of the linear response of overall structures. The up-scaling method based on asymptotic theories is used to treat the fluid flow problems where various spatial scales (microscopic and macroscopic) are present. The goal of this work is to provide an in-expensive high-order homogenized framework for the flows over complex textures such as elastic and rigid rough surfaces, isotropic and orthotropic porous media, with periodic internal distributions, independent of the material properties and the constituent's geometrical arrangement in a reliable way. The framework includes effective conditions corrected up to the high-order as a replacement of the micro-textured surfaces, producing sizeable effects on the overlaying flow as compared to the classical Navier's conditions. These effective conditions contain parameters that are non-empirical and stems from the numerical solution of auxiliary Stokes-like problems. These conditions developed for different applications are tested on the classical problems such as Hiemenz stagnation point flow over a rough plate, Hiemenz stagnation point flow over isotropic and orthotropic porous bed, backward-facing step with porous step region, and flow over the permeable channel, to test the accuracy and working capability of the framework for different flow situations. For simulation purposes, commercial software COMSOL academic version 5.4, open-source solver FreeFEM, and commercial software Star-CCM+ by are used. The outcomes of the model simulations are compared with exact simulations of our own and with literature. The overall results suggested that the homogenized model is computationally inexpensive compared to the feature-resolving simulations and can provide a quick design of drag-altering micro-textured surfaces. Moreover, the present model is flexible for further amendments to tackle complex engineered and industrial fluid flow problems.
Abstract ladder operators and their applications
Creators: name: Bagarello, Fabio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a rather general version of ladder operator $Z$ used by some authors in few recent papers, $[H_0,Z]=λZ$ for some $λ\in\mathbb{R}$, $H_0=H_0^\dagger$, and we show that several interesting results can be deduced from this formula. Then we extend it in two ways: first we replace the original equality with formula $[H_0,Z]=λZ[Z^\dagger, Z]$, and secondly we consider $[H,Z]=λZ$ for some $λ\in\mathbb{C}$, $H\neq H^\dagger$. In both cases many applications are discussed. In particular we consider factorizable Hamiltonians and Hamiltonians written in terms of operators satisfying the generalized Heisenberg algebra or the $\D$ pseudo-bosonic commutation relations.
description: accepted in Journal of Physics A
Collective Excitations of Harmonically Trapped Ideal Gases
Creators: name: Van Schaeybroeck, Bert
name: Lazarides, Achilleas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We theoretically study the collective excitations of an ideal gas confined in an isotropic harmonic trap. We give an exact solution to the Boltzmann-Vlasov equation; as expected for a single-component system, the associated mode frequencies are integer multiples of the trapping frequency. We show that the expressions found by the scaling ansatz method are a special case of our solution. Our findings, however, are most useful in case the trap contains more than one phase: we demonstrate how to obtain the oscillation frequencies in case an interface is present between the ideal gas and a different phase.
description: 4 pages, submitted to special issue of Eur. Phys. J. B "Novel Quantum Phases and Mesoscopic Physics in Quantum Gases"
Next Art (and Media) Education
Creators: name: Meyer, Torsten
Publisher: name: Medienimpulse
Year: 2014

description: Die nächste Kunst ist die Kunst der nächsten Gesellschaft. Als nächste Gesellschaft bezeichnet der Soziologe und Kulturtheoretiker Dirk Baecker – im Anschluss an den Managementdenker Peter F. Drucker – die Gesellschaft, die auf dem Computer als geschäftsführender Medientechnologie basiert. Baecker geht dabei von der u.a. auch von Marshall McLuhan, Manuel Castells, Niklas Luhmann, Régis Debray und anderen formulierten Vermutung aus, dass kaum etwas so große Bedeutung für die Strukturen einer Gesellschaft und die Formen einer Kultur hat wie die jeweils dominierenden Verbreitungsmedien. Folglich wird die Einführung des Computers für die Gesellschaft ebenso dramatische Folgen haben wie zuvor nur die Einführung der Sprache, der Schrift und des Buchdrucks. Next Art Education ist der Versuch, an diese Vermutung mit der Frage nach adäquaten Reaktionen im Feld der Verkoppelung von Kunst und Pädagogik anzuschließen. Next Art (and Media) Education ist der Versuch, diese Vermutung in den Diskurs der Medienpädagogik zu übertragen.
description: Medienimpulse, Bd. 52 Nr. 2 (2014): 2/2014 - Potenziale digitaler Medienkunst
Ectoedemia (Ectoedemia) terebinthivora
Creators: name: van Nieukerken, Erik
name: Laštůvka, Aleš
name: Laštůvka, Zdeněk
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Nepticulidae
Ectoedemia
Ectoedemia terebinthivora

description: Ectoedemia (Ectoedemia) terebinthivora (Klimesch) Biology. Hostplant: Pistacia terebinthus L. Larvae found from May to November, adults at least in May-August. Probably with several generations. Distribution. The new data fill in the known distribution throughout Greece, the islands and southern Turkey. It is here often very abundant where its host occurs. Material. Greece: vacated mines, Argolis, Ligourio, Epidauros theater archeological site, 360 m, 8.XI.2008, E.J. van Nieukerken (RMNH); vacated mines, Argolis, Kolaki, S of Arkhaia Epidavros, 374 m, 8.XI.2008, E.J. van Nieukerken (RMNH); vacated mines, Arkadia, Plaka, E. of Leonidhion, 9.XI.2008, E.J. van Nieukerken (RMNH); vacated mines, Chios: Anavatos, 500 m, 3.VIII.1999, C. van den Berg (RMNH); larvae and vacated mines, Fokis, Dhelfoi, archeological site, 600–640 m, 6.XI.2008, E.J. van Nieukerken (RMNH); 1♀, Ioánnina, 10 km NE Geroplatanos by Konitsa, 800 m, 24.VII.1990, M. Fibiger (ZMUC); 1♁, Ioannina, 4 km SW Geroplatanos, 800 m, 12.VII.1998, D. Nilsson & B. Skule (ZMUC); Kerkyra, Pandokrator, 24.X.1987, J.H. Donner (RMNH); vacated mines, Lakonia, Mystras, ancient town, 400–470 m, 11.XI.2008, E.J. van Nieukerken (RMNH); 16♁, 13♀, Messinía, Kardamili, 20. VI.1996, e.l. VI.1996, A. & Z. Laštůvka (AL); 3♁, Pieria, Leptokaria, 22. VI.1997, A. & Z. Laštůvka (AL). Turkey: 2 vacated mines, Antalya, Chimaera / Khimaira, ca 5 km N Olympos, 130 m, 1.III.2005, E.J. van Nieukerken (RMNH). All leafmines on Pistacia terebinthus .
description: Published as part of van Nieukerken, Erik, Laštůvka, Aleš & Laštůvka, Zdeněk, 2010, Western Palaearctic Ectoedemia (Zimmermannia) Hering and Ectoedemia Busck s. str. (Lepidoptera: Nepticulidae): five new species and new data on distribution, hostplants and recognition, pp. 1-82 in ZooKeys 32 (32) on page 63, DOI: 10.3897/zookeys.32.282, http://zenodo.org/record/576594
HAIGEN: Towards Human-AI Collaboration for Facilitating Creativity and Style Generation in Fashion Design
Creators: name: Jiang, Jianan
name: Wu, Di
name: Deng, Hanhui
name: Long, Yidan
name: Tang, Wenyi
name: Li, Xiang
name: Liu, Can
name: Jin, Zhanpeng
name: Zhang, Wenlei
name: Qi, Tangquan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: The process of fashion design usually involves sketching, refining, and coloring, with designers drawing inspiration from various images to fuel their creative endeavors. However, conventional image search methods often yield irrelevant results, impeding the design process. Moreover, creating and coloring sketches can be time-consuming and demanding, acting as a bottleneck in the design workflow. In this work, we introduce HAIGEN (Human-AI Collaboration for GENeration), an efficient fashion design system for Human-AI collaboration developed to aid designers. Specifically, HAIGEN consists of four modules. T2IM, located in the cloud, generates reference inspiration images directly from text prompts. With three other modules situated locally, the I2SM batch generates the image material library into a certain designer-style sketch material library. The SRM recommends similar sketches in the generated library to designers for further refinement, and the STM colors the refined sketch according to the styles of inspiration images. Through our system, any designer can perform local personalized fine-tuning and leverage the powerful generation capabilities of large models in the cloud, streamlining the entire design development process. Given that our approach integrates both cloud and local model deployment schemes, it effectively safeguards design privacy by avoiding the need to upload personalized data from local designers. We validated the effectiveness of each module through extensive qualitative and quantitative experiments. User surveys also confirmed that HAIGEN offers significant advantages in design efficiency, positioning it as a new generation of aid-tool for designers.
description: Accepted by Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (ACM IMWUT/UbiComp 2024)
Sören Kierkegaard und das Internet: Partizipation und Engagement als Hinweis auf Medienbildung
Creators: name: Hölterhof, Tobias
Publisher: name: Medienimpulse
Year: 2015

description: Sören Kierkegaard (1813-1855) hat das Internet zwar selbst nicht erlebt, dennoch hat sich ein Forschungsdiskurs etabliert, der dieses Gedankenexperiment erörtert. Anhand seiner Philosophie wird die Frage nach der existenziellen Bedeutung des Internet greifbar. Durch die Rekonstruktion des Diskurses sowie dessen Implikationen für das Lernen mit Medien wird eine Verbindung zwischen dem individuellen Lernen und den Eigenheiten von Bildungsprozessen herausgearbeitet. Dabei kann insbesondere aus der Perspektive von Partizipation und Engagement dieses Gedankenexperiment zu einem Hinweis auf Medienbildung werden.
description: Medienimpulse, Bd. 53 Nr. 2 (2015): 2/2015 - Begründungen und Ziele der Medienbildung
Efficient MIMO-OFDM Schemes for Future Terrestrial Digital TV with Unequal Received Powers
Creators: name: Nasser, Youssef
name: Hélard, Jean-François
name: Crussière, Matthieu
name: Pasquero, Oudomsack
Publisher: name: arXiv
Year: 2008
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: This article investigates the effect of equal and unequal received powers on the performances of different MIMO-OFDM schemes for terrestrial digital TV. More precisely, we focus on three types of non-orthogonal schemes: the BLAST scheme, the Linear Dispersion (LD) code and the Golden code, and we compare their performances to that of Alamouti scheme. Using two receiving antennas, we show that for moderate attenuation on the second antenna and high spectral efficiency, Golden code outperforms other schemes. However, Alamouti scheme presents the best performance for low spectral efficiency and equal received powers or when one antenna is dramatically damaged. When three antennas are used, we show that Golden code offers the highest robustness to power unbalance at the receiving side
PHARMACOEPIDEMIOLOGICAL ANALYSIS OF THE PERFORMED CONSERVATIVE TREATMENT IN PATIENTS WITH CHOLELITHIASIS OF THE GERONTOLOGICAL GROUP OF NAMANGAN
Creators: name: Mamasaliev, N.S.
name: Salakhidinov, S.Z.
name: Mamasaliev, Z.N.
name: Usmonov, B.U.
name: Qurbonova, R.R.
Publisher: name: Zenodo
Year: 2025

description: According to the WHO, in the modern treatment and diagnostic process of cholelithiasis (CSD) it is important, especially in individuals of the gerontological group (75-90 years and above), not only to provide scientific information on a certain type of treatment (surgical or conservative) and clinical and fundamental recommendations, but also to acquire modern innovative technologies acceptable for preventive surgery and the ability to use them. For the advanced development of CSD surgery in the 21st century, it is important to identify the most susceptible individuals with high or very high risk for this pathology and their special prevention to ensure the process of early detection, effective and safe treatment (with proper pharmacovigilance, pharmacoepidemiological screening) and the prevention of not only CSD itself, but also formidable complications of cholecystectomy, cholecystostomy, choledochotomy, choledochomyotomy and transduodenal sphincteropapillotomy.
Fabrication and characterization of optical micro/nanofibers
Creators: name: Bashaiah, Elaganuru
name: Suman, Shashank
name: M, Resmi
name: Das, Bratati
name: Yalla, Ramachandrarao
Publisher: name: arXiv
Year: 2024
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We experimentally demonstrate the fabrication of optical micro/nanofibers (MNFs) using chemical etching and gas-flame techniques. In the chemical etching technique, a two-step process involves 40% and 24% of hydrofluoric acid solutions for the first and second steps, respectively. The measured diameters of MNFs range is 0.34 $μ$m - 1.4 $μ$m. In the gas-flame technique, we design the pulling parameters in a four-step process to achieve the desired diameter of MNFs. The single-mode fiber is adiabatically tapered using high-precision stages while heating the fiber with hydrogen-oxygen flame. The measured diameters of pulled MNFs range is 0.48 $μ$m - 0.53 $μ$m, showing good correspondence with the designed diameters. Due to the strong confinement of the field around the MNF, it has diverse applications in various fields, such as sensing, nanophotonics, quantum optics, quantum photonics, and nonlinear optics.
description: 14 pages, 5 figures
Rezension: Habsburgs schmutziger Krieg – Ermittlungen zur österreichisch-ungarischen Kriegsführung 1914 – 1918
Creators: name: Winkler, Paul
Publisher: name: Medienimpulse
Year: 2015

description: Beschlüssen, Kalkulationen und Kontrollverlust spüren Hannes Leidinger, Verena Moritz, Karin Moser und Wolfram Dornik in ihrer problemorientierten Untersuchung der dunkelsten Kapitel des letzten Waffengangs der Habsburger nach. Eine erschreckende Vielzahl dokumentierter Pflichtverletzungen und Gräuel erhellt Mechanismen der Gewalteskalation gegen pauschal verdächtigte Massen. Eine quellenorientierte Pionierleistung mit zweifelsohne nachhaltiger Beeinflussung einer österreichischen Erinnerungskultur – auch über das Gedenkjahr 2014 hinaus.
description: Medienimpulse, Bd. 53 Nr. 2 (2015): 2/2015 - Begründungen und Ziele der Medienbildung
Efficient 3D Space Time Space Block Code for Future Terrestrial Digital TV
Creators: name: Nasser, Youssef
name: Hélard, Jean-François
name: Crussière, Matthieu
name: Pasquero, Oudomsack
Publisher: name: arXiv
Year: 2008
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: This article introduces a 3D space-time-space block code for future terrestrial digital TV in single frequency networks. The proposed 3D code is based on a double layer structure designed for inter-cell and intra-cell space time coded transmissions. We show that this new structure is particularly efficient for SFN environments regardless of the location of the receiver. It is then suitable for fixed, portable and mobile receptions.
Suppression of non-adiabatic phases by a non-Markovian environment: easier observation of Berry phases
Creators: name: Whitney, Robert S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider a two-level system coupled to a highly non-Markovian environment when the coupling axis rotates with time. The environment may be quantum (for example a bosonic bath or a spin bath) or classical (such as classical noise). We show that an Anderson orthogonality catastrophe suppresses transitions, so that the system's instantaneous eigenstates (parallel and anti-parallel to the coupling axis) can adiabatically follow the rotation. These states thereby acquire Berry phases; geometric phases given by the area enclosed by the coupling axis. Unlike in earlier proposals for environment-induced Berry phases, here there is little decoherence, so one does not need a decoherence-free subspace. Indeed we show that this Berry phase should be much easier to observe than a conventional one, because it is not masked by either the dynamic phase or the leading non-adiabatic phase. The effects that we discuss should be observable in any qubit device where one can drive three parameters in the Hamiltonian with strong man-made noise.
description: 14 pages - v4 Extended and improved presentation (complete change of method and results w.r.t. version 1)
Bit Error Rate Prediction of Coded MIMO-OFDM Systems
Creators: name: Nasser, Youssef
name: Hélard, Jean-François
name: Crussière, Matthieu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Bit error rate (BER) prediction over channel realisations has emerged as an active research area. In this paper, we give analytical signal to interference and noise ratio (SINR) evaluation of MIMO-OFDM systems using an iterative receiver. Using this analytical SINR expression, we propose an accurate BER prediction method based on effective exponential SINR mapping (EESM) method. We show by simulations that our method is independent of the channel realisation and of the MIMO scheme. It is only dependent on the modulation and coding scheme.
The OpenCitations Index
Creators: name: Heibi, Ivan
name: Moretti, Arianna
name: Peroni, Silvio
name: Soricetti, Marta
Publisher: name: arXiv
Year: 2024
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: This article presents the OpenCitations Index, a collection of open citation data maintained by OpenCitations, an independent, not-for-profit infrastructure organisation for open scholarship dedicated to publishing open bibliographic and citation data using Semantic Web and Linked Open Data technologies. The collection involves citation data harvested from multiple sources. To address the possibility of different sources providing citation data for bibliographic entities represented with different identifiers, therefore potentially representing same citation, a deduplication mechanism has been implemented. This ensures that citations integrated into OpenCitations Index are accurately identified uniquely, even when different identifiers are used. This mechanism follows a specific workflow, which encompasses a preprocessing of the original source data, a management of the provided bibliographic metadata, and the generation of new citation data to be integrated into the OpenCitations Index. The process relies on another data collection: OpenCitations Meta, and on the use of a new globally persistent identifier, namely OMID (OpenCitations Meta Identifier). As of July 2024, OpenCitations Index stores over 2 billion unique citation links, harvest from Crossref, the National Institute of Heath Open Citation Collection (NIH-OCC), DataCite, OpenAIRE, and the Japan Link Center (JaLC). OpenCitations Index can be systematically accessed and queried through several services, including SPARQL endpoint, REST APIs, and web interfaces. Additionally, dataset dumps are available for free download and reuse (under CC0 waiver) in various formats (CSV, N-Triples, and Scholix), including provenance and change tracking information.
Bound States in the Continuum in Two-Dimensional Serial Structures
Creators: name: Cattapan, G.
name: Lotti, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the occurrence of bound states in the continuum (BIC's) in serial structures of quantum dots coupled to an external waveguide, when some characteristic length of the system is changed. By resorting to a multichannel scattering-matrix approach, we show that BIC's do actually occur in two--dimensional serial structures, and that they are a robust effect. When a BIC is produced in a two--dot system, it also occurs for several coupled dots. We also show that the complex dependence of the conductance upon the geometry of the device allows for a simple picture in terms of the resonance pole motion in the multi--sheeted Riemann energy surface. Finally, we show that in correspondence to a zero--width state for the open system one has a multiplet of degenerate eigenenergies for the associated closed serial system, thereby generalizing results previously obtained for single dots and two-dot devices.
description: 15 pages, 6 figures
A class of optimal stopping problems for Markov processes
Creators: name: Dorobantu, Diana
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: Our purpose is to study a particular class of optimal stopping problems for Markov processes. We justify the value function convexity and we deduce that there exists a boundary function such that the smallest optimal stopping time is the first time when the Markov process passes over the boundary depending on time. Moreover, we propose a method to find the optimal boundary function.
Ectoedemia (Ectoedemia) phyllotomella
Creators: name: van Nieukerken, Erik
name: Laštůvka, Aleš
name: Laštůvka, Zdeněk
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Nepticulidae
Ectoedemia
Ectoedemia phyllotomella

description: Ectoedemia (Ectoedemia) phyllotomella (Klimesch) Biology. Hostplant: Quercus cerris L.. Larvae in October-November, adults in April-May. Distribution. Still only known from Italy, where it can be found in large numbers as recorded here. Remarks. The status of this species is not yet settled: adults are inseparable from E. heringi and liechtensteini, but the larval habit (cutting out a case) is striking and unique for Nepticulidae. Molecular studies are currently in progress. Material. Italy: 19♁, 22♀, Firenze, San Benedetto in Alpe, 24.X.1999, larvae on Quercus cerris, e.l. IV.2000, A. Laštůvka (AL).
description: Published as part of van Nieukerken, Erik, Laštůvka, Aleš & Laštůvka, Zdeněk, 2010, Western Palaearctic Ectoedemia (Zimmermannia) Hering and Ectoedemia Busck s. str. (Lepidoptera: Nepticulidae): five new species and new data on distribution, hostplants and recognition, pp. 1-82 in ZooKeys 32 (32) on page 63, DOI: 10.3897/zookeys.32.282, http://zenodo.org/record/576594
Rezension: Transformationen der Gewalt im Film. Über Riefenstahl, Améry, Cronenberg, Egoyan, Marker, Kluge, Farocki.
Creators: name: Ballhausen, Thomas
Publisher: name: Medienimpulse
Year: 2015

description: Medienimpulse, Bd. 53 Nr. 2 (2015): 2/2015 - Begründungen und Ziele der Medienbildung
Masked Random Noise for Communication Efficient Federated Learning
Creators: name: Li, Shiwei
name: Cheng, Yingyi
name: Wang, Haozhao
name: Tang, Xing
name: Xu, Shijie
name: Luo, Weihong
name: Li, Yuhua
name: Liu, Dugang
name: He, Xiuqiang
name: Li, Ruixuan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Federated learning is a promising distributed training paradigm that effectively safeguards data privacy. However, it may involve significant communication costs, which hinders training efficiency. In this paper, we aim to enhance communication efficiency from a new perspective. Specifically, we request the distributed clients to find optimal model updates relative to global model parameters within predefined random noise. For this purpose, we propose Federated Masked Random Noise (FedMRN), a novel framework that enables clients to learn a 1-bit mask for each model parameter and apply masked random noise (i.e., the Hadamard product of random noise and masks) to represent model updates. To make FedMRN feasible, we propose an advanced mask training strategy, called progressive stochastic masking (PSM). After local training, each client only need to transmit local masks and a random seed to the server. Additionally, we provide theoretical guarantees for the convergence of FedMRN under both strongly convex and non-convex assumptions. Extensive experiments are conducted on four popular datasets. The results show that FedMRN exhibits superior convergence speed and test accuracy compared to relevant baselines, while attaining a similar level of accuracy as FedAvg.
description: Accepted by MM 2024
Efficient formation of deeply bound ultracold molecules probed by broadband detection
Creators: name: Viteau, Matthieu
name: Chotia, Amodsen
name: Allegrini, Maria
name: Bouloufa, Nadia
name: Dulieu, Olivier
name: Comparat, Daniel
name: Pillet, Pierre
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Using a non-selective broadband detection scheme we discovered an efficient mechanism of formation of ultracold Cs$_2$ molecules in deeply bound levels ($v=1-9$) of their electronic ground state X$^1 Σ_g^+$. They are formed by a one-photon photoassociation of ultracold cesium atoms in a manifold of excited electronic states, followed by a two-step spontaneous emission cascade. We were able to form about $10^5-10^6$ molecules per second in these low vibrational levels of the ground state. This detection scheme could be generalized to other molecular species for the systematic investigation of cold molecule formation mechanisms.
description: 4 pages
A note on Quantum Aspects of Multiple Membranes
Creators: name: Bedford, James
name: Berman, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this note we investigate quantum aspects of the newly proposed theory of multiple membranes put forward by Bagger and Lambert. In particular we analyse the possibility of a finite renormalisation of the coupling at one loop.
description: 12 pages, 2 figures. Uses axodraw. v3: Reference corrected, footnotes modified
Geocaching
Creators: name: Kaindel, Christoph
Publisher: name: Medienimpulse
Year: 2016

description: Geocaching ist leicht erklärt: Jemand versteckt einen Behälter, in dem sich zumindest ein Logbuch befindet, an einem frei zugänglichen Ort und veröffentlicht die Koordinaten im Internet; andere machen sich auf die Suche und tragen sich nach dem Fund im Logbuch ein. Diese virtuelle Schatzsuche mit GPS-Unterstützung gibt es seit 15 Jahren, und nahezu ebenso lange gibt es Konzepte zum Einsatz in pädagogischen Kontexten. Aber erst mit der Verbreitung GPS-fähiger Smartphones ist Geocaching nun ohne Einstiegshürden und ohne besondere Vorbereitung durchführbar.
description: Medienimpulse, Bd. 54 Nr. 2 (2016): 2/2016 - Internet und digitale Medien als sexualisierte Räume
Relationships between six cultural scales and ten ageism dimensions: Correlation analysis using data from 31 countries
Creators: name: Kokubun, Keisuke
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: As the aging of the world accelerates, clarifying the relationship between cultural differences and ageism is an urgent issue. Therefore, in this study, we conducted a correlation analysis between the six cultural scales of Hofstede et al. [1] and the 10 ageism scales calculated from data on 35,232 people from 31 countries included in the World Values Survey Wave 6 by Inglehart et al. [2]. The results of a partial correlation analysis controlling for economic and demographic factors showed that the cultural scales were correlated with ageism. This is the first study to show that diverse cultural scales are related to multiple dimensions of ageism.
Selected vector-meson decay-distributions in reactions of polarized photons with protons
Creators: name: Titov, A. I.
name: Kampfer, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We develop a formalism for studying vector meson ($V$) photo-production at the proton ($p$) with polarized photons, $\vecγp \to V p $, through an analysis of the decay distribution in the channel $V\toπ^0γ$. We show that this decay distribution differs noticeably from the distributions of purely hadronic decays, like $ϕ\to K^+K^-$, $ω\to π^0π^+π^-$. Formulas for the decay distributions are presented which are suitable for data analysis and interpretation.
description: 3 pages, 2 figures
Horseshoe Bay analysis and design proposal
Creators: name: Gottlieb-Tanaka, Dalia
Publisher: name: University of British Columbia
Year: 2010

description: Horseshoe Bay is located in West Vancouver, British Columbia. It is a residential community, a tourist attraction with business activity, and it serves as a transportation node for B.C. Ferries Corporation. These different activities create a complex situation. This study deals with the problems resulting from conflicts between the different interest groups in Horseshoe Bay: the residents, the ferry users, the business community and the visitors to the Bay Area. The investigative study contains four main elements: A. A comparison and study of other ferry terminals in Europe. B. A comparison between two similar communities: Horseshoe Bay and Deep Cove. C. A pilot survey used as an indicator of the level of activity in the Bay Area. D. Personal observation, interviews and discussions. The results of this research conclude with suggestions for design development implementations which demonstrate that through physical changes it is possible to achieve resolutions for the existing problems in Horseshoe Bay. It was learned that elimination of the problem is not necessarily the best solution. In spite of much criticism towards the B.C. Ferries Corporation, it was learned that this operation, after all, does contribute to the economic activities of the Bay Area and has an enormous potential for further benefit there. Collaboration of the various interest groups in Horseshoe Bay will contribute towards a better comprehensive plan for the Bay Area and will benefit each one of them.
Perfect dc conductance of a finite width Mott insulator sandwiched between metallic leads at zero temperature: a quantum emergent phenomenon in strongly correlated multilayers
Creators: name: Zenia, H.
name: Freericks, J. K.
name: Krishnamurthy, H. R.
name: Pruschke, Th.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using inhomogeneous dynamical mean-field theory, we argue that the normal-metal proximity effect forces any finite number of "barrier" planes that are described by the (paramagnetic) Hubbard model and sandwiched between semi-infinite metallic leads to always be a Fermi liquid at T=0. This then implies that the inhomogeneous system restores lattice periodicity at zero frequency, has a well-defined Fermi surface, and should display perfect (ballistic) conductivity or "transparency". These results are, however, fragile with respect to finite frequency, V, T, disorder, or magnetism, all of which restore the expected quantum tunneling regime through a finite-width Mott insulator. Our formal results are complemented by numerical renormalization group studies on small thickness barriers that illustrate under what circumstances this behavior might be seen in real experimental systems.
description: (5 pages, 2 figures, ReVTeX)
Distributed Augmentation, Hypersweeps, and Branch Decomposition of Contour Trees for Scientific Exploration
Creators: name: Li, Mingzhe
name: Carr, Hamish
name: Rübel, Oliver
name: Wang, Bei
name: Weber, Gunther H.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computational Geometry (cs.CG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Contour trees describe the topology of level sets in scalar fields and are widely used in topological data analysis and visualization. A main challenge of utilizing contour trees for large-scale scientific data is their computation at scale using high-performance computing. To address this challenge, recent work has introduced distributed hierarchical contour trees for distributed computation and storage of contour trees. However, effective use of these distributed structures in analysis and visualization requires subsequent computation of geometric properties and branch decomposition to support contour extraction and exploration. In this work, we introduce distributed algorithms for augmentation, hypersweeps, and branch decomposition that enable parallel computation of geometric properties, and support the use of distributed contour trees as query structures for scientific exploration. We evaluate the parallel performance of these algorithms and apply them to identify and extract important contours for scientific visualization.
description: 9 pages, accepted by IEEE VIS 2024
Superlinear Scaling for Innovation in Cities
Creators: name: Arbesman, Samuel
name: Kleinberg, Jon M.
name: Strogatz, Steven H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Superlinear scaling in cities, which appears in sociological quantities such as economic productivity and creative output relative to urban population size, has been observed but not been given a satisfactory theoretical explanation. Here we provide a network model for the superlinear relationship between population size and innovation found in cities, with a reasonable range for the exponent.
description: 5 pages, 5 figures, 1 table, submitted to Phys. Rev. E; references corrected; figures corrected, references and brief discussion added
Discrete coherent states for n qubits
Creators: name: Munoz, C.
name: Klimov, A. B.
name: Sanchez-Soto, L. L.
name: Bjork, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Discrete coherent states for a system of $n$ qubits are introduced in terms of eigenstates of the finite Fourier transform. The properties of these states are pictured in phase space by resorting to the discrete Wigner function
description: 8 pages. 1 color figure. To appear in Int. J. Quantum Inf