cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Text/Conference Paper
Creators: name: Keus, Alexandra
name: Noichl, Svenja
name: Schroeder, Ulrik
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Barrierefreiheit
subject: Cross-Plattform-App
subject: Native Android App
subject: Web-App
subject: Lernapplikation

description: Während durch die Digitalisierung die Zahl der Smartphone- und Tablet-Nutzerinnen und Nutzer stetig steigt, leben gleichzeitig zahlreiche Menschen mit Behinderungen in Deutschland. In Bezug auf mobile Lehr- und Lernangebote wird das Thema Barrierefreiheit immer bedeutender. Mit Hilfe von manuellen und toolgestützten Tests wird eine beispielhafte Lernapplikation, zur Anwendung erlernten Interaktionsmöglichkeiten mit mobilen Geräten, auf Barrierefreiheit überprüft. Dabei wird die App in drei Varianten, einer nativen Android App, einer Cross-Plattform-App sowie einer Web-App betrachtet. Es zeigt sich, dass barrierefreie Entwicklung gemäß existierender Richtlinien grundsätzlich möglich ist, jedoch alle App-Varianten gewisse Vor- und Nachteile bieten.
Dynamics of critical vortices on the torus and on the plane
Creators: name: Gonzalez-Arroyo, Antonio
name: Ramos, Alberto
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the Bradlow parameter expansion to construct the metric tensor in the space of solutions of the Bogomolny equations for the Abelian Higgs model on a two-dimensional torus. Using this metric we study the dynamics and scattering of vortices on the torus within the geodesic approximation. For small torus volumes the metric is determined in terms of a small number of parameters. For large volumes the results provide a very precise approximation to the metric and dynamics on the plane.
description: Latex, 30 Pages, 6 figures
title: Text/Conference Paper
Creators: name: Klingauf, Anna
name: Funk, Johannes
name: Lüüs, Angela
name: Schmidt, Ludger
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Virtual Reality
subject: Augmented Reality
subject: 3D‑360°-Video
subject: Blicksteuerung
subject: Handwerk

description: Die vorliegende Studie vergleicht den Einsatz von 3D-360°‑Lernvideos mit konventionellen Lernvideos bei der praktischen Ausbildung von Handwerkern. Es wurde die Hypothese geprüft, dass Motivation und Ablenkung durch die Technologie einen gegensätzlichen Einfluss auf den Lernerfolg haben und so die vorliegenden gemischten Befunde in diesem Feld erklären. Insgesamt 20 Auszubildende des ersten Lehrjahrs der Ausbildung zum Hoch- bzw. Tiefbaufacharbeiter lernten entweder mit konventionellen Lernvideos am Laptop oder mit 3D‑360°-Videos, die auf einem Smartphone‑basierten Head-Mounted Display angeschaut wurden. Der Lernerfolg wurde anhand einer praktischen Aufgabe gemessen, die von zwei unabhängigen Ratern bewertet wurde. Die durch die Lernmethode ausgelöste Motivation und Ablenkung der Lernenden wurde mithilfe von Fragebögen gemessen. Wie erwartet zeigte sich in der Gruppe der mit 3D‑360°‑Videos Lernenden sowohl eine höhere Motivation als auch eine höhere Ablenkung als in der Kontrollgruppe. Der Lernerfolg unterschied sich nicht zwischen den Gruppen. Die erwarteten Korrelationsmuster zur Unterstützung der weiteren Teilhypothesen konnten nicht gefunden werden.
Path integral contour deformations for observables in $SU(N)$ gauge theory
Creators: name: Detmold, William
name: Kanwar, Gurtej
name: Lamm, Henry
name: Wagman, Michael L.
name: Warrington, Neill C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Path integral contour deformations have been shown to mitigate sign and signal-to-noise problems associated with phase fluctuations in lattice field theories. We define a family of contour deformations applicable to $SU(N)$ lattice gauge theory that can reduce sign and signal-to-noise problems associated with complex actions and complex observables. For observables, these contours can be used to define deformed observables with identical expectation value but different variance. As a proof-of-principle, we apply machine learning techniques to optimize the deformed observables associated with Wilson loops in two dimensional $SU(2)$ and $SU(3)$ gauge theory. We study loops consisting of up to 64 plaquettes and achieve variance reduction of up to 4 orders of magnitude.
description: 25 pages, 12 figures
title: Text/Conference Paper
Creators: name: Richter, Christoph
name: Allert, Heidrun
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: critical design
subject: learning ecologies
subject: educational technologies
subject: computer-supported collaborative learning
subject: inquiry-based learning
subject: epistemic practices

description: This position paper seeks to chart a critical design agenda in support of collective learning ecologies, evolving assemblages of digital, spatial, social, cultural, and/or knowledge resources that are aimed to foster forms of collective learning and knowledge creation. Starting from an ecological perspective on learning, the paper challenges individualistic notions of learning and instrumental understandings of educational technology and argues that there is a need for educational formats and technologies capable to support learners engaged in epistemic endeavors that reach beyond established institutional boundaries and address them as responsible citizens. It is argued that there is a need (a) to take stock of new and alternative knowledge practices, (b) to reconsider the existing social, legal and technical protocols, standards, and infrastructures, (c) to cultivate social relations beyond institutional boundaries, as well as (d) to work towards a pedagogy of articulation and risk.
Detection of four invasive crayfish species in Brussels waterbodies using eDNA and qPCR
Creators: name: Vanderheyden, Ann
name: Vermeersch, Xavier
name: Smitz, Nathalie
name: Vanden Abeele, Samuel
name: Kratz, Fanny
name: Breugelmans, Karin
name: Segers, Brigitte
name: De Meyer, Marc
name: Backeljau, Thierry
Publisher: name: Zenodo
Year: 2024
Subjects: invasive crayfish
eDNA
qPCR
freshwater ponds
Brussels
Belgium
bopco
Brussels Environment
RIPARIAS

description: Environmental DNA (eDNA) sampling has become an essential and sensitive detection method to monitor native and invasive species populations. In Europe, some crayfish are invasive and established populations can spread rapidly in freshwater environments. Tracking their presence (early detection) and distribution is difficult using live captures, especially since setting traps is more time consuming and less cost effective. Therefore, the potential of eDNA assay as a monitoring tool is explored. Fifty locations in Brussels (Belgium) were sampled and tested for the presence of four invasive crayfish species (Procambarus clarkii, Procambarus virginalis, Faxonius limosus and Pontastacus leptodactylus). The present investigation aims at i)  testing existing qPCR protocols and evaluating their suitability at detecting the targeted invasive crayfishes, ii) evaluating the eDNA assays reliability by comparing the results against live capture data iii) evaluating the advantages and disadvantages of eDNA assays vs live captures. Different qPCR protocols were tested against selectivity and sensitivity and two different filter protocols were applied on the field. From seven existing protocols four qPCR assays were selected to detect the presence of the targeted invasive crayfishes. At least two invasive species have been confirmed for five locations in Brussels using eDNA. The outcome of this study indicates an underrepresentation of the expected results (based on live capture data), caused by undersampling of the waterponds and inhibitory substances counteracting qPCR detection. 

BopCo was contracted by Brussels Environment for the LIFE RIPARIAS project (LIFE19 NAT/BE/000953)
title: Text/Conference Paper
Creators: name: Zender, Raphael
name: Weise, Matthias
name: Lucke, Ulrike
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Virtual Reality
subject: Handlungsorientiertes Lernen
subject: Berufliche Bildung
subject: Lackierausbildung

description: Im Rahmen der FahrzeuglackiererInnen-Ausbildung kann Virtual Reality (VR) zur Förderung des handlungsorientierten Erlernens von Techniken zur Durchführung von Kfz-Lackierarbeiten eingesetzt werden. Im Projekt HandLeVR wird dafür zunächst untersucht, welchen Beitrag VR-Technologien generell bieten, um Lernen in der Berufsausbildung zu ermöglichen bzw. wie diese Technologien didaktisiert werden können, um entsprechende Lernerfolge sicherzustellen. Auf Grundlage dieser Fragestellung wird eine VR-Lackierwerkstatt als virtuelle 3D-Lernumgebung mit Autoren-, Trainings- und Reflexionskomponente gestaltet, implementiert und im berufsbildenden Einsatz evaluiert.
Local negative magnetic permeability and possibility of observation of breather excitations in magnetic metamaterials
Creators: name: Bogdan, M. M.
name: Charkina, O. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: It is shown that the long-wave dynamics and magnetic properties of one-dimensional systems constructed of the inductively and capacitively coupled split-ring resonators are described by the regularized nonlinear dispersive Klein-Gordon equations. It is found that in such systems a highfrequency magnetic field excites dynamic solitons on a \glqq pedestal\grqq-stable breathers, oscillating in anti-phase with respect to the background of uniform oscillations, which means the existence of regions with a negative magnetic permeability in the system. If supplemented by a medium with negative permittivity, such a system forms a \glqq left-handed\grqq metamaterial in which the regions with the breather excitations are transparent to electromagnetic radiation. This makes it possible to observe them experimentally.
description: 9 pages, 3 figures
Chandra and Spitzer observations of CDFS X-ray obscured QSOs
Creators: name: Georgantopoulos, I.
name: Georgakakis, A.
name: Akylas, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present Chandra and Spitzer data of the 186, extragalactic, hard 2-10 keV X-ray selected sources, which lie in the central part of the Chandra Deep Field South (CDFS). For the vast majority of sources (99.5%) there is a spectroscopic or photometric redshift available. We classify 17 sources as X-ray obscured QSOs, according to strictly X-ray criteria, i.e. defined as having large hydrogen column densities (N_H>10^22 cgs) and luminosities (Lx>10^44 cgs). The surface density of X-ray obscured QSOs is ~210 sq. deg. We find 18 candidate Compton thick N_H>10^24 cgs sources, of which three have QSO luminosities (L_x>10^44 cgs). The X-ray obscured QSO comprise a mixed bag of objects, covering the redshift range z=1.3-4.3. Eight of these show narrow line optical spectra, two show no obscuration in their optical spectra presenting Broad Lines, while for the other seven there is only a photometric redshift available. About half of the X-ray obscured QSOs show high X-ray to optical flux ratios, X/O>1, and red colours, I-3.6>4. Combination of the X-ray with the mid-IR 8 or 24 micron flux can be used as an additional diagnostic to sift out the heavily obscured AGN. All X-ray selected QSOs present red mid-IR colours and can be easily separated among mid-IR sources, demonstrating that mid-IR selection provides a powerful tool for the detection of obscured QSOs.
description: To appear in A&A
title: Text/Conference Paper
Creators: name: Moebert, Tobias
name: Lucke, Ulrike
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Computergestütztes Training
subject: Digital Game Based Learning
subject: Autismus
subject: Adaptivität

description: Das Erkennen und Teilen fremder Emotionen sowie das Ausdrücken eigener Emotionen sind eine wesentliche Grundlage des sozialen Miteinanders. Diese Fähigkeiten sind bei Menschen mit Autismus beeinträchtigt. Das Training sozioemotionaler Kompetenzen ist deshalb gerade für Menschen mit Autismus nützlich. Ein solches Training kann mithilfe einer spielbasierten Anwendung effektiv gestaltet werden. Der Beitrag stellt ein solches Trainingssystem vor, welches die Spezifika der Zielgruppe adressiert.
EGGTART: A computational tool to visualize the dynamics of biophysical transport processes under the inhomogeneous $\ell$-TASEP
Creators: name: Erdmann-Pham, Dan D.
name: Son, Wonjun
name: Duc, Khanh Dao
name: Song, Yun S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The totally asymmetric simple exclusion process (TASEP), which describes the stochastic dynamics of interacting particles on a lattice, has been actively studied over the past several decades and applied to model important biological transport processes. Here we present a software package, called EGGTART (Extensive GUI gives TASEP-realization in real time), which quantifies and visualizes the dynamics associated with a generalized version of the TASEP with an extended particle size and heterogeneous jump rates. This computational tool is based on analytic formulas obtained from deriving and solving the hydrodynamic limit of the process. It allows an immediate quantification of the particle density, flux, and phase diagram, as a function of a few key parameters associated with the system, which would be difficult to achieve via conventional stochastic simulations. Our software should therefore be of interest to biophysicists studying general transport processes, and can in particular be used in the context of gene expression to model and quantify mRNA translation of different coding sequences.
description: 12 pages, 6 figures
Mixed Sneutrino Dark Matter and the Ratio Omega(b)/Omega(dm)
Creators: name: West, Stephen M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is known that the cosmological baryon density ($Ω_{\rm{b}}$) and dark matter density ($Ω_{\rm{dm}}$) have strikingly similar values. However, in most theories of the early Universe, each density is explained by separate dynamics and consequently there is no compelling reason for this observation. In this note, I briefly review a model in which the dark matter species possesses a particle-antiparticle asymmetry. This asymmetry determines both the baryon asymmetry and strongly affects the dark matter density, thus naturally linking $Ω_{\rm{b}}$ and $Ω_{\rm{dm}}$. In these models it is shown that sneutrinos can play the role of such dark matter.
description: 4 pages, 4 figures, to appear in Proceedings of SUSY06, the 14th International Conference on Supersymmetry and the Unification of Fundamental Interactions, UC Irvine, California, 12-17 June 2006
Cyclic dominance and biodiversity in well-mixed populations
Creators: name: Claussen, Jens Christian
name: Traulsen, Arne
Publisher: name: arXiv
Year: 2008
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Coevolutionary dynamics is investigated in chemical catalysis, biological evolution, social and economic systems. The dynamics of these systems can be analyzed within the unifying framework of evolutionary game theory. In this Letter, we show that even in well-mixed finite populations, where the dynamics is inherently stochastic, biodiversity is possible with three cyclic dominant strategies. We show how the interplay of evolutionary dynamics, discreteness of the population, and the nature of the interactions influences the coexistence of strategies. We calculate a critical population size above which coexistence is likely.
description: Physical Review Letters, in print (2008)
Simple Non Linear Klein-Gordon Equations in 2 space dimensions, with long range scattering
Creators: name: Taflin, Erik
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 35L70, 35Q75, 35P25, 74J20

description: We establish that solutions, to the most simple NLKG equations in 2 space dimensions with mass resonance, exhibits long range scattering phenomena. Modified wave operators and solutions are constructed for these equations. We also show that the modified wave operators can be chosen such that they linearize the non-linear representation of the Poincaré group defined by the NLKG.
description: 19 pages, LaTeX, To appear in Lett. Math. Phys
Dynamical properties of ultracold bosons in an optical lattice
Creators: name: Huber, S. D.
name: Altman, E.
name: Büchler, H. P.
name: Blatter, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the excitation spectrum of strongly correlated lattice bosons for the Mott-insulating phase and for the superfluid phase close to localization. Within a Schwinger-boson mean-field approach we find two gapped modes in the Mott insulator and the combination of a sound mode (Goldstone) and a gapped (Higgs) mode in the superfluid. To make our findings comparable with experimental results, we calculate the dynamic structure factor as well as the linear response to the optical lattice modulation introduced by Stoeferle et al. [Phys. Rev. Lett. 92, 130403 (2004)]. We find that the puzzling finite frequency absorption observed in the superfluid phase could be explained via the excitation of the gapped (Higgs) mode. We check the consistency of our results with an adapted f-sum-rule and propose an extension of the experimental technique by Stoeferle et al. to further verify our findings.
description: 13 pages, 5 figures
Export-Led Growth Hypothesis in ECOWAS: A Panel Data Analysis
Creators: name: Kollie, Genesis B.
name: Kollie, Genesis B.
Publisher: name: Unknown
Year: 2020
Subjects: subject: International Relations/Trade
subject: ECOWAS
subject: Export-Led Growth
subject: Panel ARDL
subject: Economic growth
subject: Granger causality

description: The export led-growth hypothesis is one of the widely researched areas in the field of international economics. However, there is an ongoing debate as to whether it is export that causes economic growth or vice versa; with past and current research showing mixed findings. This paper retested the export-led growth hypothesis using panel data for ten selected ECOWAS member countries from 2000 to 2017. We used panel autoregressive distributed lags/pooled mean group (ARDL/PMG) approach as well as the panel causality test to determine the directional relationships of the macroeconomic variables used. We further disaggregated export into three (merchandise export, services export and total export) and controlled for other growth-relevant variables. From the panel ARDL/PMG estimation, we found that merchandise export positively influences economic growth in both the short and long runs; while services export and total export positively impact economic growth only in the long run. Using the pairwise granger causality test, we found a long run causal relationship flowing from services and total exports to economic growth respectively. However, we also found a bidirectional relationship between merchandise export and economic growth. Given the findings, this study found support for the export-led growth hypothesis in ECOWAS. Policy wise, efforts to improve the region’s economy should be channeled through export promotion strategies.
Character of eigenstates of the 3D disordered Anderson Hamiltonian
Creators: name: Brndiar, J.
name: Markos, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study numerically the character of electron eigenstates of the three dimensional disordered Anderson model. Analysis of the statistics of inverse participation ratio as well as numerical evaluation of the electron-hole correlation function confirm that there are no localized states below the mobility edge, as well as no metallic state in the tail of the conductive band. We discuss also finite size effects observed in the analysis of all the discussed quantities.
description: 7 pages, 9 figures, resubmitted to Physical Review B
title: Text/Conference Paper
Creators: name: Braeschke, Lucas
name: Braun, Iris
name: Kapp, Felix
name: Hara, Tenshi
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Audience Response System
subject: ARS
subject: Zuversicht
subject: Selbsteinschätzung

description: Die reine Erfassung von Antworten auf Lernfragen in Audience Response Systemen (ARS) leidet in der Regel unter einer Entkopplung zwischen tatsächlich vorhandenem Wissen, gefühltem Wissen und irrtümlich angenommenem Wissen. Für Lernende ist eine Einschätzung der Wissensqualität für erfolgreiches Lernen jedoch unverzichtbar. Durch die zusätzliche Erfassung der Ant­wortzuversicht wird Lernenden der tatsächliche Wissensstand zugänglich; darüber hinaus ist dann eine erfolgreiche Lernbedarfsermittlung möglich. Ob fehlendes oder falsches Verständnis vor­liegt, oder Wissen nur partiell oder doch vollständig verarbeitet wurde, kann mit den Mitteln von Audience Response Systemen einfach und elegant verarbeitet und den Lernenden als indivi­duali­sierte Auswertung zugänglich gemacht werden. In diesem Beitrag wird eine prototypische Imple­mentierung mit ersten Evaluationsergebnissen präsentiert.
title: Text/Conference Paper
Creators: name: Pfennig, Anja
name: Maier-Rothe, Jörg
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: making-of
subject: Lehrfilm
subject: Lehrfilmformate
subject: peer-to-peer

description: Lehrfilme im Kontext der Hochschulausbildung setzen einen audiovisuellen Impuls, werden als probates Lernmedium eingesetzt und umfassen eine Vielzahl unterschiedlicher Lernmethoden. Weil Lehrfilme in der Grundlagenlehre Werkstofftechnik als begleitende Lernmittel eingesetzt werden, müssen sie inhaltlich einem auf die Kursinhalte zugeschnittenen hohen Qualitätsanspruch genügen. Wichtig bei der Erstellung der Lehrfilme ist die Beteiligung von Studierenden (Peer-to-Peer Ansatz). Ihre unmittelbare Nähe zum modernen Lernprozess und die Anforderungen an Lernbedürfnisse sind entscheidend für den späteren Lernerfolg. Der Lernerfolg wird auch durch die Bereitstellung unterschiedlicher Filmformate unterstützt. Im Folgenden werden aus persönlicher Erfahrung heraus niederschwellige, praktische Empfehlungen zur Umsetzung von „funktionierenden“ Lehrfilmen (keine Produktbewerbungen) gegeben und eine erste Bewertung des Einsatzes von Lehrfilmen in der Grundlagenlehre der Studieneingangsphase Maschinenbau vorgenommen.
Enactive Mandala: Audio-visualizing Brain Waves
Creators: name: Tokunaga, Tomohiro
name: Lyons, Michael J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Multimedia (cs.MM)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: H.5.5; J.5

description: We are exploring the design and implementation of artificial expressions, kinetic audio-visual representations of real-time physiological data that reflect emotional and cognitive state. In this work, we demonstrate a prototype, the Enactive Mandala, which maps real-time EEG signals to modulate ambient music and animated visual music. Transparent real-time audio-visual feedback of brainwave qualities supports intuitive insight into the connection between thoughts and physiological states.
description: 2 pages, 2 figures
Spintronics with a Weyl point in superconducting nanostructures
Creators: name: Chen, Yuguang
name: Nazarov, Yuli
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigate transport in a superconducting nanostructure housing a Weyl point in the spectrum of Andreev bound states. A minimum magnet state is realized in the vicinity of the point. One or more normal-metal leads are tunnel-coupled to the nanostructure. We have shown that this minimum magnetic setup is suitable for realization of all common goals of spintronics: detection of a magnetic state, conversion of electric currents into spin currents, potentially reaching the absolute limit of one spin per charge transferred, detection of spin accumulation in the leads. The peculiarity and possible advantage of the setup is the ability to switch between magnetic and non-magnetic states by tiny changes of the control parameters: superconducting phase differences. We employ this property to demonstrate the feasibility of less common spintronic effects: spin on demand and alternative spin current.
description: 9 pages, 6 figures
Riedel-Spangenberger, Ilona, Grundbegriffe des Kirchenrechts
Creators: name: Laubenberger, Lorenz
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 48 Nr. 1 (1999): Ökumenische Rundschau, Band 48, Heft 1
Gravitational wave scintillation by a stellar cluster
Creators: name: Congedo, G.
name: De Paolis, F.
name: Longo, P.
name: Nucita, A. A.
name: Vetrugno, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The diffraction effects on gravitational waves propagating through a stellar cluster are analyzed in the relevant approximation of Fresnel diffraction limit. We find that a gravitational wave scintillation effect - similar to the radio source scintillation effect - comes out naturally, implying that the gravitational wave intensity changes in a characteristic way as the observer moves.
description: 9 pages, in press in IJMP D
Supplementary materials for Salivary Cortisol and Cortisone Can Circumvent the Confounding Effects of Combined Oral Contraceptives in the Short Synacthen test
Creators: name: Bäcklund, Nils
name: Lundstedt, Staffan
name: Tornevi, Andreas
name: Wihlbäck, Anna-Carin
name: Dahlqvist, Per
name: Brattsand, Göran
name: Olsson, Tommy
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 320208
subject: Endocrinology

description: Supplementary materials for Salivary Cortisol and Cortisone Can Circumvent the Confounding Effects of Combined Oral Contraceptives in the Short Synacthen test
Restorative principles in the criminal justice system: alternatives for satisfying justice?
Creators: name: Van't Westeinde, Jobine
Publisher: name: University of British Columbia
Year: 2009

description: The subject of this thesis is criminal justice policy. It focusses on diversion, that is, alternatives to the court system. I argue that the current criminal justice system, which is rooted in retributive principles, has shortfalls which are of such a degree that it makes sense to consider alternatives. A new movement in criminal justice policy, restorative justice, reflects a theory that may provide a framework for new programs. Restorative justice is based on principles that are fundamentally different from retributive ideology and the translation of these ideas results in dramatically different programs. In my thesis I delineate the differences between restorative and retributive principles. The retributive system leads to dissatisfaction among the stakeholders in the criminal process. The purpose of the thesis is to investigate whether implementation of restorative justice principles could lead to more satisfaction and a higher quality of justice. The restorative justice theory has a strong rhetoric, as will be made clear. The implementation of restorative programs, however, does not develop quickly. There are several reasons for the slowness, including the reluctance of criminal justice officials to give new initiatives a chance to develop and to co-operate in their development. I describe three restorative programs that divert criminal cases from the court system, they are: mediation, dading, and family group conferences. On the basis of these programs I make clear which are the strengths and the possible weaknesses of restorative justice. The comparison of different programs from different countries, provides a useful insight in the dynamics of restorative justice in practice. International research and comparison will lead to understanding in how to design a suitable and valuable process. My conclusion is that a truly restorative system is neither a realistic, nor a wished situation. For a variety of cases, though, restorative programs provide a better locus for resolving the problems involved in crime, than the court process does. I therefore advise that the development of restorative programs must go on.
Deformation Quantization, Quantization, and the Klein-Gordon Equation
Creators: name: Tillman, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The aim of this proceeding is to give a basic introduction to Deformation Quantization (DQ) to physicists. We compare DQ to canonical quantization and path integral methods. It is described how certain issues such as the roles of associativity, covariance, dynamics, and operator orderings are understood in the context of DQ. Convergence issues in DQ are mentioned. Additionally, we formulate the Klein-Gordon (KG) equation in DQ. Original results are discussed which include the exact construction of the Fedosov star-product on the dS and AdS space-times. Also, the KG equation is written down for these space-times. This is a proceedings to the Second International Conference on Quantum Theories and Renormalization Group in Gravity and Cosmology.
description: This is a proceedings to the Second International Conference on Quantum Theories and Renormalization Group in Gravity and Cosmology
title: Επίδραση της θερμικής μάζας στις θερμικές ανάγκες διαλειπούσης θέρμανσης των κτιρίων
title: Effect of thermal mass on buildings intermittent heating demand
titleType: AlternativeTitle
Creators: name: Ξύγγης, Γεώργιος
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Θερμική μάζα
Βαθμοημέρες θέρμανσης
Θερμική μάζα κτιρίου
Εξοικονόμηση ενέργειας

description: Θερμική (δραστική) μάζα, ορισμός και υπολογισμοί. Επίδραση της θερμικής μάζας στην ενεργειακή συμπεριφορά των κτιρίων. Ανάλυση με εφαρμογή της μεθόδου των βαθμοημερών. Επιβεβαίωση με εφαρμογή αναλυτικής προσομοίωσης. Δυνατότητες αξιοποίησης των συμπερασμάτων στη μείωση των αναγκών θέρμανσης
Kunze, Rolf-Ulrich, Theodor Heckel
Creators: name: Heidingsfeld, Uwe-Peter
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 48 Nr. 1 (1999): Ökumenische Rundschau, Band 48, Heft 1
Trading Strategies of a Leveraged ETF in a Continuous Double Auction Market Using an Agent-Based Simulation
Creators: name: Yagi, Isao
name: Maruyama, Shunya
name: Mizuta, Takanobu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Multiagent Systems (cs.MA)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: A leveraged ETF is a fund aimed at achieving a rate of return several times greater than that of the underlying asset such as Nikkei 225 futures. Recently, it has been suggested that rebalancing trades of a leveraged ETF may destabilize the financial markets. An empirical study using an agent-based simulation indicated that a rebalancing trade strategy could affect the price formation of an underlying asset market. However, no leveraged ETF trading method for suppressing the increase in volatility as much as possible has yet been proposed. In this paper, we compare different strategies of trading for a proposed trading model and report the results of our investigation regarding how best to suppress an increase in market volatility. As a result, it was found that as the minimum number of orders in a rebalancing trade increases, the impact on the market price formation decreases.
‘A Marriage Litigation in the Church Court’: Lydgate’s Adaptation of Chaucer’s Literary Value in The Temple of Glass
Creators: name: Vrekaj, Juljan
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: medieval literature
subject: dreamvisions
subject: marriage litigations
subject: Church court
subject: John Lydgate
subject: Chaucer
subject: 800 Literatur::800 Literatur, Rhetorik, Literaturwissenschaft::800 Literatur und Rhetorik
subject: 800 Literatur::800 Literatur, Rhetorik, Literaturwissenschaft::809 Geschichte, Darstellung, Literaturwissenschaft und- kritik

description: In this essay, I give an alternative reading of Chaucerian resonances that fill Lydgate’s The Temple of Glass by analyzing the poem’s allusions to the House of Fame. I argue that Lydgate, as a poet who was well read in Chaucer and considered as his most prolific imitator, comprehended the experimentations of his ‘maister’. Taking into account Meyer-Lee’s study on the House of Fame, which explores Chaucer’s efforts to transform the value of the literary field of late medieval English poetry to better suit his then transitional social position, I assert that by borrowing details of setting, time and place from House of Fame, Lydgate implies his use of the framework set up by Chaucer to adopt his alteration of literary value. In doing so, Lydgate emulates Chaucer’s idea of the literary as an autonomous discourse, which would fundamentally allow him to write courtly productions even from his rather peculiar position as a monk. An analysis of the relations between Lydgate’s poetry and his position as a monk sheds light on his imitation in The Temple of Glass of Chaucer’s attempt to create a poetry that projected him as an authentic poet in connection with both the literary field of the court and his socioeconomic position.
Interaction between charge-regulated metal nanoparticles in an electrolyte solution
Creators: name: Bakhshandeh, Amin
name: Santos, Alexandre P. dos
name: Levin, Yan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present a theory which allows us to calculate the interaction potential between charge-regulated metal nanoparticles inside an acid-electrolyte solution. The approach is based on the recently introduced model of charge regulation which permits us to explicitly -- within a specific microscopic model -- relate the bulk association constant of a weak acid to the surface association constant for the same weak acid adsorption sites. When considering metal nanoparticles we explicitly account for the effect of the induced surface charge in the conducting core. To explore the accuracy of the approximations, we compare the ionic density profiles of an isolated charge-regulated metal nanoparticle with explicit Monte Carlo simulations of the same model. Once the accuracy of the theoretical approach is established, we proceed to calculate the interaction force between two charge-regulated metal nanoparticles by numerically solving the Poisson-Boltzmann equation with charge regulation boundary condition. The force is then calculated by integrating the electroosmotic stress tensor. We find that for metal nanoparticles the charge regulation boundary condition can be well approximated by the constant surface charge boundary condition, for which a very accurate Derjaguin-like approximation was recently introduced. On the other hand, a constant surface potential boundary condition often used in colloidal literature, shows a significant deviation from the charge regulation boundary condition for particles with large charge asymmetry.
description: The Journal of Physical Chemistry B 2020
Tax administration, Taxpayer’s Reciprocity and Compliance in Tanzania: Empirical Evidence from a Survey
Creators: name: Mzalendo, Ryoba
name: Chimilila, Cyril
name: Mzalendo, Ryoba
name: Chimilila, Cyril
Publisher: name: Unknown
Year: 2020
Subjects: subject: Public Economics
subject: Tax administration
subject: taxpayer reciprocity
subject: tax compliance attitude
subject: Tanzania

description: This paper analysed the effects of tax administration on taxpayer reciprocity and compliance. Four aspects: trust in the tax administration, corruption in tax administration, awareness and certainty of taxes to be paid, and ability of the tax administration to detect tax evaders were assessed. We obtained strong support that these variables significantly influence reciprocity and compliance. The tax administration in Tanzania therefore needs to improve on these aspects in efforts to boost voluntary tax compliance. Also, in the same vein of making people more compliant there is a need to improve on provision of tax education. Likewise, the enhancement in utilisation of ICT in tax administration processes.
title: Text/Conference Paper
Creators: name: Westburg, Anika
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Computational Linguistics
subject: e-Learning
subject: context-free grammar
subject: formal grammar
subject: Parsing

description: This paper presents the CL-Taskbox, an e-Learning tool for learning and teaching parsing-as-deduction, which is a specific approach to parsing. The tool provides parsing tasks the user solves with the help of constant visual feedback of the tool. The CL-Taskbox generates simple random tasks or allows to solve custom tasks, which the user can share and bookmark. The implementation is available online and anybody can use it with any common web browser.
Propagation of weakly stretched premixed spherical spray flames in localized homogeneous and heterogeneous reactants
Creators: name: Li, Qiang
name: Zhang, Huangwei
name: Shu, Chang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Propagation of weakly stretched spherical flames in partially pre-vaporized fuel sprays is theoretically investigated in this work. A general theory is developed to describe flame propagation speed, flame temperature, droplet evaporation onset and completion locations. The influences of liquid fuel and gas mixture properties on spherical spray flame propagation are studied. The results indicate that the spray flame propagation speed is enhanced with increased droplet mass loading and/or evaporation heat exchange coefficient (or evaporation rate). Opposite trends are found when the latent heat is high, due to strong evaporation heat absorption. Fuel vapor and temperature gradients are observed in the post-flame evaporation zone of heterogeneous flames. Evaporation completion front location considerably changes with flame radius, but the evaporation onset location varies little relative to the flame front when the flame propagates. For larger droplet loading and smaller evaporation rate, the fuel droplet tends to complete evaporation behind the flame front. Flame bifurcation occurs with high droplet mass loading under large latent heat, leading to multiplicity of flame propagation speed, droplet evaporation onset and completion fronts. The flame enhancement or weakening effects by the fuel droplet sprays are revealed by enhanced or suppressed heat and mass diffusion process in the pre-flame zone. Besides, for heterogeneous flames, heat and mass diffusion in the post-flame zone also exists. The mass diffusion for both homogeneous and heterogeneous flames is enhanced with decreased Lewis number. The magnitude of Markstein length is considerably reduced with increased droplet loading. Moreover, post-flame droplet burning behind heterogeneous flame influences the flame propagation speed and Markstein length when the liquid fuel loading is relatively low.
Natural Pans as an Important Surface Water Resource in the Cuvelai Basin - Metrics for Storage Volume Calculations and Identification of Potential Augmentation Sites
Creators: name: Arendt, Robert
name: Reinhardt-Imjela, Christian
name: Schulte, Achim
name: Faulstich, Leona
name: Ullmann, Tobias
name: Beck, Lorenz
name: Martinis, Sandro
name: Johannes, Petrina
name: Lengricht, Joachim
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Namibia
subject: Angola
subject: Oshana
subject: flood
subject: drought
subject: water retention
subject: storage volume
subject: Blue SpotAnalysis
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

description: Numerous ephemeral rivers and thousands of natural pans characterize the transboundary Iishana-System of the Cuvelai Basin between Namibia and Angola. After the rainy season, surface water stored in pans is often the only affordable water source for many people in rural areas. High inter- and intra-annual rainfall variations in this semiarid environment provoke years of extreme flood events and long periods of droughts. Thus, the issue of water availability is playing an increasingly important role in one of the most densely populated and fastest growing regions in southwestern Africa. Currently, there is no transnational approach to quantifying the potential storage and supply functions of the Iishana-System. To bridge these knowledge gaps and to increase the resilience of the local people’s livelihood, suitable pans for expansion as intermediate storage were identified and their metrics determined. Therefore, a modified Blue Spot Analysis was performed, based on the high-resolution TanDEM-X digital elevation model. Further, surface area–volume ratio calculations were accomplished for finding suitable augmentation sites in a first step. The potential water storage volume of more than 190,000 pans was calculated at 1.9 km3. Over 2200 pans were identified for potential expansion to facilitate increased water supply and flood protection in the future.
Powerful t-SNE technique leading to clear separation of type-2 AGN and HII galaxies in BPT diagrams
Creators: name: Zhang, XueGuang
name: Feng, Yanqiu
name: Chen, Huan
name: Yuan, QiRong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Narrow emission-line galaxies can be distinguished in the well-known BPT diagrams through narrow emission line properties. However, there are no boundaries visible to the naked eye between type-2 AGN and HII galaxies in BPT diagrams, besides the extreme dividing lines expected by theoretical photoionization models. Here, based on powerful t-SNE technique applied to the local narrow emission-line galaxies in SDSS DR15, type-2 AGN and HII galaxies can be clearly separated in the t-SNE determined two-dimensional projected map, and then the dividing lines can be mathematically determined in BPT diagrams, leading to charming harmonization of the theoretical expectations and the actual results from real observed properties. The results not only provide an interesting and robust method to determine the dividing lines in BPT diagrams through the powerful t-SNE technique, but also lead to further confirmation on previously defined composite galaxies more efficiently classified in the BPT diagram of [OIII]/H$β$ versus [NII]/H$α$.
description: 9 pages, 5 figures, accepted to be published in ApJ
Radio light curves and imaging of the helium nova V445 Puppis reveal seven years of synchrotron emission
Creators: name: Nyamai, M. M.
name: Chomiuk, L.
name: Ribeiro, V. A. R. M.
name: Woudt, P. A.
name: Strader, J.
name: Sokolovsky, K. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: V445 Puppis is the only helium nova observed to date; its eruption in late 2000 showed high velocities up to 8500 km/s and a remarkable bipolar morphology cinched by an equatorial dust disc. Here we present multi-frequency radio observations of V445 Pup obtained with the Very Large Array (VLA) spanning 1.5 to 43.3 GHz, and between 2001 January and 2008 March (days 89 to 2700 after eruption). The radio light curve is dominated by synchrotron emission over these seven years, and shows four distinct radio flares. Resolved radio images obtained in the VLA A configuration show that the synchrotron emission hugs the equatorial disc, and comparisons to near-IR images of the nova clearly demonstrate that it is the densest ejecta, not the fastest ejecta, that are the sites of the synchrotron emission in V445 Pup. The data are consistent with a model where the synchrotron emission is produced by a wind from the white dwarf impacting the dense equatorial disc, resulting in shocks and particle acceleration. The individual synchrotron flares may be associated with density enhancements in the equatorial disc and/ or velocity variations in the wind from the white dwarf. This overall scenario is similar to a common picture of shock production in hydrogen-rich classical novae, but V445 Pup is remarkable in that these shocks persist for almost a decade, much longer than the weeks or months for which shocks are typically observed in classical novae.
description: 22 Pages, 5 figures, Accepted for publication in MNRAS
Quantum Transport Length Scales in Silicon-based Semiconducting Nanowires: Surface Roughness Effects
Creators: name: Lherbier, Aurelien
name: Persson, Martin
name: Niquet, Yann-Michel
name: Triozon, Francois
name: Roche, Stephan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on a theoretical study of quantum charge transport in atomistic models of silicon nanowires with surface roughness-based disorder. Depending on the nanowires features (length, roughness profile) various conduction regimes are explored numerically by using efficient real space order N computational approaches of both Kubo-Greenwood and Landauer-Buttiker transport frameworks. Quantitative estimations of the elastic mean free paths, charge mobilities and localization lengths are performed as a function of the correlation length of the surface roughness disorder. The obtained values for charge mobilities well compare with the experimental estimates of the most performant undoped nanowires. Further the limitations of the Thouless relationship between the mean free path and the localization length are outlined.
description: 13 pages, to appear in PRB
title: Text/Conference Paper
Creators: name: Lefarth, Justin
name: Otto, Benjamin
name: Schramm, Thilo
name: Striewe, Michael
name: Schmiemann, Philipp
name: Goedicke, Michael
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Blended Learning
subject: E-Assessment
subject: Aufgabengenerierung
subject: Biologiedidaktik

description: Der Beitrag demonstriert und analysiert an zwei Fallbeispielen aus der Biologie, wie fachspezifische Selbstlernaufgaben mit variablen Inhalten für ein Blended Learning Angebot automatisiert erzeugt werden können. Es wird gezeigt, dass auch hochspezifische fachliche Eigenschaften technisch abgebildet werden können und eine gute Item-Qualität erzeugt werden kann.