cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Realisierbarkeit der webseitenübergreifenden Nutzerverfolgung ohne die Verwendung von Cookies in der Europäischen Union
Creators: name: Griese, Valentin
Publisher: name: Hochschule Hannover
Year: 2020
Subjects: subject: 004 Informatik

description: Die Nutzerverfolgung im Internet durch die Verwendung von Browsercookies ist gängige Praxis, doch haben diverse datenschutzrechtliche Entwicklungen der letzten Jahre zugunsten der Verbraucher diese Form des Trackings in vielerlei Hinsicht eingeschränkt und auch die Usability von Websites maßgeblich beeinträchtigt. Um weiterhin eine Personalisierung von Werbung und anderen Inhalten unter Wahrung der Nutzbarkeit und Rechte der Nutzer zu gewährleisten, ist es unausweichlich, eine neue Methode zur Identifizierung von Besuchern zu etablieren. Das Ziel dieser Arbeit ist, verschiedene Trackingtechnologien unter Berücksichtigung gegebener Rahmenbedingungen im Rechtsraum der Europäischen Union in ihrer Funktionsweise zu vergleichen und die nach derzeitigem Stand realistische Nachfolgetechnologie zum Tracking via Cookies zu benennen – Fingerprinting. Dieses überzeugt in Bezug auf seine Langlebigkeit und rechtliche Vereinbarkeit, den Implementierungsaufwand sowie den Umfang der sammelbaren Daten. Darauf aufbauend ist eine statistische Untersuchung zur Verbreitung von Methoden aus dem Feld des Fingerprintings auf den meistgenutzten Internetseiten durchgeführt worden. Dabei ergibt sich, dass Informationen, die zur Erstellung eines Fingerprints genutzt werden können, von fast allen Websites abgefragt werden, jedoch durchschnittlich nur wenige verschiedene Arten von Fingerprints genutzt werden. Auf einigen Websites werden durch größere dritte Unternehmen Fingerprints erfasst, der Opt-in-Status hingegen hat in den meisten Fällen für die Praktizierung von Fingerprinting keine Relevanz. Da Fingerprinting auch für schädliche Zwecke, zum Beispiel das Verteilen von potenterer Schadsoftware, verwendet werden kann, ist die Reaktion von Browserentwicklern und -nutzern auf die Entwicklung von derzeitigen und zukünftigen Fingerprintingkonzepten ungewiss, und auch die rechtliche Lage der nächste Jahre hängt von angekündigten Verordnungen ab, die in ihrem Inhalt noch nicht bekannt sind.
title: Automatisierte Kundenkommunikation: Bot or Not? Eine Untersuchung der Akzeptanz von textbasierten Dialogsystemen in der Kundenkommunikation von Unternehmen
Creators: name: Nagahi, Sweety
Publisher: name: Hochschule Hannover
Year: 2020
Subjects: subject: 380 Handel, Kommunikation, Verkehr

description: Die Nutzung von Messenger-Diensten hat die Nutzung von sozialen Medien übertroffen. Diese Mediennutzung bringt veränderte Erwartungen an Unternehmen mit sich. Unternehmen begegnen den Erwartungen ihrer Kund*innen in der Online-Kundenkommunikation mit dem Einsatz textbasierter Dialogsysteme. Im Facebook-Messenger wurden 2018 bereits über 300.000 Chatbots angeboten. Das Problem ist, dass Studien seit mehreren Jahren aufzeigen, dass diese Kommunikationstechnologie sich bei den Kund*innen noch nicht durchgesetzt hat und häufig noch skeptisch betrachtet wird. Für Unternehmen ist es daher notwendig zu verstehen, welche Kriterien erfüllt sein müssen, um die Akzeptanzbildung der Kund*innen gegenüber textbasierten Dialogsystemen positiv zu beeinflussen. Das Ziel dieser Arbeit ist es zu betrachten, inwiefern die Eigenschaften textbasierter Dialogsysteme die Akzeptanzkriterien der Kund*innen erfüllen können. Dazu wird die folgende Forschungsfrage gestellt: Wie akzeptieren Kunden den Einsatz textbasierter Dialogsysteme in der Online-Kundenkommunikation von Unternehmen? Um die Forschungsfrage zu beantworten, wird eine Literaturanalyse durchgeführt. Die Literatur wird mit Studienergebnissen verglichen, um Übereinstimmungen und Abweichungen herauszuarbeiten. Eine Akzeptanzanalyse hat ergeben, dass Kund*innen textbasierte Dialogsysteme vor allem akzeptieren, wenn sie darin einen Nutzen erkennen. Jedoch beeinflussen neben nutzenorientierten Faktoren auch emotionale Faktoren die Akzeptanz. Auf dieser Grundlage ist es empfehlenswert, positive und negative Einflussfaktoren des Akzeptanzprozesses zu identifizieren und die Gestaltung textbasierter Dialogsysteme an die Kund*innen anzupassen, bevor diese eingesetzt werden.
Effects of AMBD and isovaline on GABAergic transmission in thalamic neurons
Creators: name: Asseri, Khalid
Publisher: name: University of British Columbia
Year: 2011

description: In central neurons, the endogenous amino acid γ-aminobutyric acid (GABA) exerts synaptic inhibition mediated through ionotropic GABAA-, or metabotropic GABAB-receptors. These receptors exist on both pre- and postsynaptic membranes. The synthetic structural analogues of GABA, 6-aminomethyl-3-methyl-4H-1,2,4-benzothiadiazine-1,1-dioxide (AMBD) and R-isovaline have received little study on synaptic inhibition in the mammalian thalamus. AMBD was originally proposed as a taurine antagonist whereas R-isovaline is a non-biogenic amino acid that increases postsynaptic K⁺ conductance of thalamocortical neurons. The aim of this work was to assess the prediction that AMBD and R-isovaline would affect presynaptic release of GABA onto neurons of ventrobasal nuclei. AMBD and R-isovaline were applied by perfusion of thalamic slices obtained from juvenile Sprague-Dawley rats (P10 -13). During whole-cell patch clamp recording from thalamocortical neurons, we voltage-clamped neurons at a holding potential of -70 mV. Miniature inhibitory postsynaptic currents (mIPSCs) were recorded in the presence of tetrodotoxin (TTX). Kynurenic acid and internal Cs⁺ were used to block postsynaptic glutamate receptors and K⁺ conductances. We used the GABAA antagonist bicuculline to identify GABAergic mIPSCs, without affecting a possible presynaptic GABAB-component. Applied alone at 250 μM, AMBD had no effect on the passive and active membrane properties of neurons. In the range of 10 µM to 1 mM, AMBD had no effect on amplitude or decay time constant of GABAergic mIPSCs. Acting with an IC₅₀ of 232 μM, AMBD reversibly reduced the frequency of GABAergic mIPSCs. The above observations implied that AMBD reduced presynaptic release of GABA. In a range of 25 to 200 µM, R-isovaline had no effect on the holding current or frequency, amplitude and decay time constant of GABAergic mIPSCs. Hence, R-isovaline did not affect release of GABA and did not affect receptors on nerve terminals. In summary, AMBD reversibly decreased the presynaptic release of GABA, likely by an action on nerve terminals while having no effects on postsynaptic membrane properties that could account for the reduced frequency of GABAergic mIPSCs. The exact mechanism whereby AMBD decreased GABA release remains unclear. R-isovaline had no effect on GABA release in ventrobasal nuclei.
title: Crowd-basierte Luftqualitätsmessungen mit der Complex Event Processing Engine Siddhi auf Raspberry Pi
Creators: name: Engelhardt, Andreas
Publisher: name: Hochschule Hannover
Year: 2020
Subjects: subject: 004 Informatik

description: Unter Crowdsensing versteht man Anwendungen, in denen Sensordaten kollaborativ von einer Menge von Freiwilligen erhoben werden. So kann Crowdsensing eingesetzt werden um die Luftqualität an Orten zu messen, an denen keine fest installierten Sensoren verfügbar sind. In Crowdsensing-Systemen müssen die Teilnehmer koordiniert und die Messdaten verarbeitet werden, um relevante Daten zu erhalten. Im Rahmen der Abschlussarbeit wurde ein System konzipiert und prototypisch umgesetzt, das auf einem Raspberry Pi (unter Einsatz geeigneter Sensoren) Sensordaten erhebt und mit der Complex Event Processing Technologie verarbeitet.
title: Revisiting the art of Francis Bacon and his contemporaries
Creators: name: Hammer, Martin
Publisher: name: University of Kent
Year: 2021

description: The nine items that I am submitting for a PhD by publication (two books and seven articles, amounting to some 220,000 words in total) constitute, I claim, a coherent body of research in terms of both subject-matter and of underlying art-historical methodology. The field studied is British figurative painting during the 1940s and 1950s, with particular reference to the art of Francis Bacon, who emerged as an innovative and influential figure at that time. Other British artists under scrutiny include Graham Sutherland, Lucian Freud and Frank Auerbach. My main interest is in visual intelligence and the process of visual translation within creativity, as discussed in the accompanying, 12,000 word reflective essay. I seek to analyse how artists feed in a highly purposeful and inventive manner off one another (Bacon and Sutherland in the 1940s), off their predecessors (such as Edgar Degas, Waiter Sickert, Chaim Soutine, Pablo Picasso and Alberto Giacometti) and, especially in the case of Bacon, off various kinds of photographic imagery, above all propaganda emanating from pre-war Nazi Germany. This approach serves to embed the interpretation of meaning and content, a crucial concern for all these artists against the backdrop of a profoundly traumatic period in world history, within the analysis of formal language and of the process whereby artists and extend and manipulate to their own ends available resources of two-dimensional imagery.
Loboplusia Jaschhof
Creators: name: Jaschhof, Mathias
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Cecidomyiidae
Loboplusia

description: Genus Loboplusia Jaschhof gen. nov.
Type species, zurqui sp. nov., here designated.
This new genus is introduced to absorb an unusual diallactiine from Costa Rica, which has the Haplusia type of wing venation (Fig. 15D), but is otherwise completely different from other Diallactiini, including Haplusia.
Diagnosis. Loboplusia is the only genus of Winnertziinae, including Diallactiini, whose scutum has a bright membranous window anterior of the scutellum (= prescutellar window, ↓, Fig. 15C). Setae on the legs, especially the tarsi, are fringed (Fig. 15E), a condition I have not noticed in any other mycophagous cecidomyiids. Male genitalia are remarkable for the gonostylus consisting of two lobes (↓, Fig. 15A), and for the gonocoxae whose ventrobasal bridge is extremely short (↓, Fig. 15A). The ovipositor of Loboplusia is more compact (Fig. 16A) than that of any other diallactiine I have seen.
Etymology. The generic name is composed of Lobo -, from the Latin word lobus for lobe, with reference to the bilobed gonostyli, and the ending - plusia, from Haplusia, a genus with which Loboplusia shares similar venation. Gender of the name is feminine.
description: Published as part of Jaschhof, Mathias, 2016, A review of world Diallactiini (Diptera, Cecidomyiidae, Winnertziinae), with the description of six new genera and seventeen new species, pp. 201-244 in Zootaxa 4127 (2) on page 231, DOI: 10.11646/zootaxa.4127.2.1, http://zenodo.org/record/267022
title: Korruption – Einstellung – Polizei
Creators: name: Heber, Frank
name: Jungwirth, Simone
name: Schäffer, Angelika
Publisher: name: Hochschule Hannover
Year: 2020
Subjects: subject: 150 Psychologie

description: In diesem Beitrag werden die Ergebnisse einer Personalbefragung österreichischer Polizisten und Polizistinnen in Ausbildung geschildert, bei denen die Einstellung zu Korruption erhoben wurde. Weiterhin wurden Variablen wie Geschlecht, Alter und Bildungsgrad erhoben, die in Hellfeldforschung zu Korruption häufig als Merkmale von Korruptionstätern und Korruptionstäterinnen genannt werden. Im Fokus dieses Beitrags steht unter anderem die Frage, inwieweit sich Befunde aus dem Hellfeld von Korruption im Dunkelfeld abbilden. Zur Klärung dieser Frage werden Merkmale aus dem Hellfeld der Korruptionstäter und Korruptionstäterinnen auf eine Ursache-Wirkungs-Beziehung mit der Einstellung zu Korruption im Dunkelfeld überprüft. Zudem wird in diesem Beitrag die Frage geklärt, wie die Polizisten und Polizistinnen in Ausbildung hinsichtlich der Einstellung zu Korruption im Vergleich mit der Allgemeinbevölkerung Österreichs abschneiden. Polizisten und Polizistinnen in Ausbildung sind für das Bundesamt zur Korruptionsprävention und Korruptionsbekämpfung (kurz: BAK) die größte Zielgruppe bei der Ausbildung und Weiterbildung öffentlich Bediensteter in Österreich. Die Ergebnisse lassen erkennen, dass sich die Befunde aus dem Hellfeld von Korruption nicht im Dunkelfeld abbilden, denn die überprüften Variablen weisen insgesamt betrachtet keine substanzielle Ursache-Wirkungs-Beziehung mit der Einstellung zu Korruption auf. Hinsichtlich des Vergleichs der österreichischen Polizisten und Polizistinnen in Ausbildung mit der Allgemeinbevölkerung Österreichs zeigen sich nur geringfügige Unterschiede in der Einstellung zu Korruption. Tendenziell lehnen die Polizisten und Polizistinnen in Ausbildung Korruption eher ab als die Allgemeinbevölkerung Österreichs.
description: Personalpsychologie, 9
Dissociative electron attachment and vibrational excitation of $\mathbf{CF_3Cl}$: Effect of two vibrational modes revisited
Creators: name: Tarana, Michal
name: Houfek, Karel
name: Horáček, Jiří
name: Fabrikant, Ilya I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present a study of dissociative electron attachment and vibrational excitation processes in electron collisions with the CF$_3$Cl molecule. The calculations are based on the two-dimensional nuclear dynamics including the C-Cl symmetric stretch coordinate and the CF$_3$ symmetric deformation (umbrella) coordinate. The complex potential energy surfaces are calculated using the ab initio R-matrix method. The results for dissociative attachment and vibrational excitation of the umbrella mode agree quite well with experiment while the cross section for excitation of the C-Cl symmetric stretch vibrations is about a factor of three low as compared to experimental data.
description: 24 pages, 7 figures, submitted to Physical Review A
Change and response in Japan's international economic policy
Creators: name: Drysdale, Peter
Publisher: name: Columbia University
Year: 1990
Subjects: Economics
Commerce

description: The establishment of a liberal multilateral trading system in the postwar period presented opportunities for rapid economic growth for Japan, and for other countries in East Asia and the Pacific, including Australia. The strength of the American economy and American political leadership ensured, for almost a generation, economic and trade growth that provided the substantial underpinning for the Western economic and security alliance. The success of the liberal international economic system, the rise of Japan and Europe as major centers of economic power and its converse, the declining relative importance of North America in the world economy, bring new challenges to international trade and economic diplomacy. These challenges focus heavily upon Japan.
Analysis of a data matrix and a graph: Metagenomic data and the phylogenetic tree
Creators: name: Purdom, Elizabeth
Publisher: name: arXiv
Year: 2012
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: In biological experiments researchers often have information in the form of a graph that supplements observed numerical data. Incorporating the knowledge contained in these graphs into an analysis of the numerical data is an important and nontrivial task. We look at the example of metagenomic data---data from a genomic survey of the abundance of different species of bacteria in a sample. Here, the graph of interest is a phylogenetic tree depicting the interspecies relationships among the bacteria species. We illustrate that analysis of the data in a nonstandard inner-product space effectively uses this additional graphical information and produces more meaningful results.
description: Published in at http://dx.doi.org/10.1214/10-AOAS402 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Impact of asphaltene precipitation on vapex performance
Creators: name: Haghighat, Parnian
Publisher: name: University of Calgary
Year: 2008

description: Bibliography: p. 123-129
description: Many pages are in colour.
description: The VAPEX (Vapor Extraction) is an oil recovery process, in which heavy oil or bitumen is mobilized by injection of a low molecular weight hydrocarbon solvent and is drained by gravity to a horizontal production well. It has attracted considerable attention because of its potential applicability to problematic reservoirs and the chance of in situ upgrading of the oil during the process. The objective of the current work was to determine whether the beneficial effects of asphaltene precipitation will outweigh any formation damage in Vapex operations. The effects of in situ precipitation and deposition of asphaltenes on the rate of oil drainage and the quality of the produced oil under different operating conditions were experimentally evaluated. The experiments were conducted in a physical model packed with realistic permeability sand and propane was used as the solvent. The experimental results show that the oil produced at higher injection pressures was substantially upgraded but the viscosity reduction by asphaltene precipitation did not lead to higher rates of production. The effect of viscosity reduction was negated by the accompanying damage to formation permeability. Injection of toluene with propane was successful in increasing the rate of production and the extent of upgrading was encouraging. The huff and puff injection of toluene into the production well, to remove damage from the near well zone, was not successful. It led to production of oil with higher asphaltene content and there was no improvement in the rate of oil drainage compared to lower pressure operation with minimal asphaltene precipitation.
A Secure and Privacy-Preserving Targeted Ad-System
Creators: name: Androulaki, Elli
name: Bellovin, Steven Michael
Publisher: name: Columbia University
Year: 2009
Subjects: Computer science

description: Thanks to its low product-promotion cost and its efficiency, targeted online advertising has become very popular. Unfortunately, being profile-based, online advertising methods violate consumers' privacy, which has engendered resistance to the ads. However, protecting privacy through anonymity seems to encourage click-fraud. In this paper, we define consumer's privacy and present a privacy-preserving, targeted ad system (PPOAd) which is resistant towards click fraud. Our scheme is structured to provide financial incentives to to all entities involved.
The W_L W_L scattering at the LHC: improving the selection criteria
Creators: name: Doroba, K.
name: Kalinowski, J.
name: Kuczmarski, J.
name: Pokorski, S.
name: Rosiek, J.
name: Szleper, M.
name: Tkaczyk, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a systematic study of the different mechanisms leading to WW pair production at the LHC, both in the same-sign and opposite-sign channels, and we emphasize that the former offers much better potential for investigating non-resonant W_L W_L scattering. We propose a new kinematic variable to isolate the W_L W_L scattering component in same-sign WW production at the LHC. Focusing on purely leptonic W decay channels, we show that it considerably improves the LHC capabilities to shed light on the electroweak symmetry breaking mechanism after collecting 100 fb^{-1} of data at sqrt{s} = 14 TeV. The new variable is less effective in the opposite-sign WW channel due to different background composition.
description: 25 pages, 32 figures
title: Reproduzierbarkeit von Studien in der Computerlinguistik
Creators: name: Andresen, Amelie
Publisher: name: Hochschule Hannover
Year: 2019
Subjects: subject: 020 Bibliotheks- und Informationswissenschaft

description: Die Reproduzierbarkeit von Studien ist wichtig, um ihre Ergebnisse prüfen zu können. Auch bei Forschung, die auf frühere Ergebnisse aufbaut, wird zuweilen ein Zugang zu den alten Daten oder dem Source Code benötigt. Diese Arbeit analysiert Studien aus der Computerlinguistik hinsichtlich ihrer Reproduzierbarkeit. Zunächst werden die Begrifflichkeiten zu diesem speziellen Gebiet definiert und im folgenden Schritt wird ein Datensatz erstellt, in dem ausgewählte Open-Access-Studien aus dem Jahre 2018 auf der Basis zuvor festgelegter Kriterien bewertet werden. Diese sind unter anderem die Zugänglichkeit des benutzten Materials, der angewendeten Methoden und der Ergebnisse. Neben den Kriterien werden auch Hypothesen zu diesem Datensatz aufgestellt. Schließlich werden die Ergebnisse visualisiert und hinsichtlich besagter Hypothesen interpretiert. Basierend auf der resultierenden Auswertung sind die meisten Studien reproduzierbar. Im Ausblick werden mögliche Weiterführungen und Erweiterungen dieser Untersuchung erläutert.
Barium abundance in red giants of NGC 6752. Non-local thermodynamic equilibrium and three-dimensional effects
Creators: name: Dobrovolskas, V.
name: Kučinskas, A.
name: Andrievsky, S. M.
name: Korotin, S. A.
name: Mishenina, T. V.
name: Bonifacio, P.
name: Ludwig, H. -G.
name: Caffau, E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: (Abridged) Aims: We study the effects related to departures from non-local thermodynamic equilibrium (NLTE) and homogeneity in the atmospheres of red giant stars in Galactic globular cluster NGC 6752, to assess their influence on the formation of Ba II lines. Methods: One-dimensional (1D) local thermodynamic equilibrium (LTE) and 1D NLTE barium abundances were derived using classical 1D ATLAS stellar model atmospheres. The three-dimensional (3D) LTE abundances were obtained for 8 red giants on the lower RGB, by adjusting their 1D LTE abundances using 3D-1D abundance corrections, i.e., the differences between the abundances obtained from the same spectral line using the 3D hydrodynamical (CO5BOLD) and classical 1D (LHD) stellar model atmospheres. Results: The mean 1D barium-to-iron abundance ratios derived for 20 giants are _{1D NLTE} = 0.05 \pm0.06 (stat.) \pm0.08 (sys.). The 3D-1D abundance correction obtained for 8 giants is small (~+0.05 dex), thus leads to only minor adjustment when applied to the mean 1D NLTE barium-to-iron abundance ratio for the 20 giants, _{3D+NLTE} = 0.10 \pm0.06(stat.) \pm0.10(sys.). The intrinsic abundance spread between the individual cluster stars is small and can be explained in terms of uncertainties in the abundance determinations. Conclusions: Deviations from LTE play an important role in the formation of barium lines in the atmospheres of red giants studied here. The role of 3D hydrodynamical effects should not be dismissed either, even if the obtained 3D-1D abundance corrections are small. This result is a consequence of subtle fine-tuning of individual contributions from horizontal temperature fluctuations and differences between the average temperature profiles in the 3D and 1D model atmospheres: owing to the comparable size and opposite sign, their contributions nearly cancel each other.
description: Minor typos corrected. Accepted for publication in A&A (9 pages, 3 figures, 6 tables)
Unmarried fathers' earnings trajectories: does partnership status matter?
Creators: name: Garfinkel, Irwin
name: McLanahan, Sara S.
name: Meadows, Sarah O.
name: Mincy, Ronald B.
Publisher: name: Columbia University
Year: 2009
Subjects: Families

description: Married men earn more than unmarried men. Previous research suggests that marriage itself "causes" some of the difference, but includes few men who fathered children out of wedlock. This paper asks whether increasing marriage (and possibly cohabitation) following a non-marital birth is likely to increase fathers' earnings and labor supply. The analyses are based on a new birth cohort study—the Fragile Families and Child Wellbeing Study—which follows unmarried parents for the first five years after their child's birth. Results provide some support for the idea that increasing marriage will lead to increased
title: Biopolymers - facts and statistics
title: Production capacities, processing routes, feedstock, land and water use
titleType: Subtitle
Creators: name: IfBB Institut Für Biokunststoffe Und Bioverbundwerkstoffe
Publisher: name: Hochschule Hannover
Year: 2020
Subjects: subject: 660 Technische Chemie

description: One of the main concerns of this publication is to furnish a more rational basis for discussing bioplastics and use fact-based arguments in the public discourse. Furthermore, “Biopolymers – facts and statistics” aims to provide specific, qualified answers easily and quickly for decision-makers in particular from public administration and the industrial sector. Therefore, this publication is made up like a set of rules and standards and largely foregoes textual detail. It offers extensive market-relevant and technical facts presented in graphs and charts, which means that the information is much easier to grasp. The reader can expect comparative market figures for various materials, regions, applications, process routes, agricultural land use, water use or resource consumption, production capacities, geographic distribution, etc.
description: Biopolymers - facts and statistics, 5
title: Nutzerzufriedenheit mit der Bibliothek der Hochschule Hannover: Eine empirische Untersuchung
Creators: name: Poets, Rebecca
Publisher: name: Hochschule Hannover
Year: 2020
Subjects: subject: 020 Bibliotheks- und Informationswissenschaft

description: Durch den Wandel des bibliothekarischen Selbstverständnisses zum zunehmend wirtschaftlich geführten Dienstleistungsbetrieb gewinnt die Nutzerorientierung im Bibliothekssektor an Bedeutung. Insbesondere Nutzerzufriedenheit ist in diesem Kontext ein wichtiges Ziel von zukunftsorientierten Bibliotheken. Für die Bibliothek der Hochschule Hannover ist aus diesem Grund im Mai 2020 eine empirische Zufriedenheitsstudie unter den Mitgliedern der Hochschule durchgeführt worden. Es wurden Nutzungseigenschaften sowie Ansichten bezüglich Dienstleistungen, Lokalitäten und Gesamteindrücken erhoben. Ergänzend zur Auswertung dieser Ergebnisse wird in dieser Arbeit ein Vergleich mit denen der bis dato jüngsten Zufriedenheitsstudie von 2009 gezogen. Ziel der onlinebasierten Befragung sowie des Vergleichs ist die Ermittlung von Nutzerbedürfnissen und Kritikpunkten, um eine fundierte Entwicklungsempfehlung für die Bibliothek erstellen zu können. Maßnahmen, die auf dieser Empfehlung basieren, sollen eine Steigerung der Nutzerzufriedenheit ermöglichen. Die Analyse der Antworten lässt vor allem auf einen Mangel des selbstständigen Informierens über die Angebote der Bibliothek sowie deren Nutzung für das wissenschaftliche Arbeiten schließen. Daher werden insbesondere eine Verbesserung der aktiven Kommunikation mit den Zielgruppen und die Förderung der Informationskompetenz der Nutzer empfohlen.
description: In the context of the current change of library self-conception towards a progressively economically managed service provider, user orientation is acquiring an increased significance in the library sector. User satisfaction in particular constitutes an important goal for futureoriented libraries. On that account, in May 2020, an empirical satisfaction survey has been conducted for the library of Hochschule Hannover (University of Applied Sciences and Arts) that addresses all members of the university. Characteristics of use and views towards services, localities and overall impressions have been collected. Additional to analyzing the data, this thesis compares the results with those of the latest satisfaction survey from 2009. The online-based survey, paired with the comparison, aims to detect the users’ needs and areas of criticism in order to create a well-founded recommendation for future development of the library. Measures which are based upon this recommendation are expected to enable an increase in user satisfaction. The response assessment indicates a lack of autonomous information behavior regarding library services and usage for academic purposes. Consequently, an improvement of active communication towards the target groups as well as promotion of the users’ information literacy are recommended.
Issues Concerning Loop Corrections to the Primordial Power Spectra
Creators: name: Miao, S. P.
name: Woodard, R. P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We expound ten principles in an attempt to clarify the debate over infrared loop corrections to the primordial scalar and tensor power spectra from inflation. Among other things we note that existing proposals for nonlinear extensions of the scalar fluctuation field $ζ$ introduce new ultraviolet divergences which no one understands how to renormalize. Loop corrections and higher correlators of these putative observables would also be enhanced by inverse powers of the slow roll parameter $ε$. We propose an extension which should be better behaved.
description: 36 pages, uses LaTeX2e, version 3 revised for publication with a much expanded section 4, proving that our proposed extension of the zeta-zeta correlator absorbs the one loop infrared divergences from gravitons
Physics of Dark Matter in the Light of Dark Atoms
Creators: name: Khlopov, Maxim Yu.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Direct searches for dark matter lead to serious problems for simple models with stable neutral Weakly Interacting Massive Particles (WIMPs) as candidates for dark matter. A possibility is discussed that new stable quarks and charged leptons exist and are hidden from detection, being bound in neutral dark atoms of composite dark matter. Stable -2 charged particles $O^{--}$ are bound with primordial helium in O-helium (OHe) atoms, being specific nuclear interacting form of composite Warmer than Cold dark matter. Slowed down in the terrestrial matter, OHe is elusive for direct methods of underground dark matter detection based on the search for effects of nuclear recoil in WIMP-nucleus collisions. The positive results of DAMA experiments can be explained as annual modulation of radiative capture of O-helium by nuclei. In the framework of this approach test of DAMA results in detectors with other chemical content becomes a nontrivial task, while the experimental search of stable charged particles at LHC or in cosmic rays acquires a meaning of direct test for composite dark matter scenario.
description: Invited brief review to be published in Modern Physics Letters A, matches published version, two refs added
title: Musterlösungen in Graja als Mechanismus für Regressionstests
Creators: name: Herschel, Marc
Publisher: name: Hochschule Hannover
Year: 2020
Subjects: subject: 004 Informatik

description: Der Autobewerter Graja, der in der Lehre zum Bewerten studentischer Java-Programme verwendet wird, stellt ein komplexes Softwaresystem dar. Aufgrund einer kaum vorhandenen Testabdeckung durch Modul- und Integrationstests, ist die Gewährleistung der fehlerfreien Funktionalität in Hinsicht auf die Weiterentwicklung nicht garantiert. Da sich Graja auf das ProFormA-Aufgabenformat stützt, stellt sich die Frage, inwiefern sich die im ProFormA-Aufgabenformat vorausgesetzten Musterlösungen, für einen automatisierten Regressionstestmechanismus eignen. Das Ziel dieser Forschung ist es ein Konzept, für einen solchen Regressionstestmechanismus zu erstellen und mithilfe einer Referenzimplementierung als Graja-Erweiterung in die Praxis umzusetzen. Der daraus entstandene Mechanismus operiert durch Verhaltensaufzeichnung und Verhaltensabgleich und konvertiert so das in Graja beobachtete Bewertungsverhalten einer Musterlösung in einen Testfall. In der Testphase findet anschließend ein Abgleich des Soll-Verhaltens eines Testfalls und des beobachteten Ist-Verhaltens einer Musterlösung statt. Die Differenzen dieses Abgleichs sind als potenzielle Regressionen zu behandeln, da diese eine semantische Änderung des Bewertungsergebnisses darstellen. Um diesen Verhaltensabgleich robust und mit möglichst wenigen Fehlalarme zu realisieren, wurden die in Graja verwendeten Datenmodelle auf Eignung bezüglich einer Verhaltensaufzeichnung untersucht. Außerdem fand eine Datenaufzeichnung mit einer Teilmenge der Musterlösungen statt. Nachfolgend wurde eine Analyse dieser Rohdaten, mit dem Ziel potenzielles Rauschen innerhalb der Aufzeichnungen zu detektieren, durchgeführt. So konnte letztendlich eine Strategie für eine Rauschunterdrückung innerhalb der Verhaltensaufzeichnung entwickelt werden. Abschließend wurde ein Datenmodell entwickelt, das erlaubt, die durch den Verhaltensabgleich detektierten Regressionen verständlich und lokalisierbar darzustellen. Der durch diese Arbeit entstandene automatisierte Regressionstestmechanismus stellt somit eine Grundlage für die Gewährleistung der korrekten Bewertungsfunktionalität innerhalb des Graja-Entwicklungsprozesses dar. Durch das Detektieren von Regressionen mithilfe der Musterlösungen, lassen sich nun Änderungen an Graja gewissenhaft in eine Produktionsumgebung übernehmen.
title: Der Erfolgsfaktor Bürgerkommunikation im Kontext der Projektkommunikation von Bauvorhaben : Handlungsempfehlungen für die Immobilien-PR
Creators: name: Ritter, Stella
Publisher: name: Hochschule Hannover
Year: 2020
Subjects: subject: 380 Handel, Kommunikation, Verkehr

description: Die Gesellschaft ist geprägt von einem zunehmenden Bedürfnis nach Mitbestimmung und damit auch Beteiligung. In Zeiten mangelnder Wohnangebote ist das Interesse besonders groß, wenn bedeutsame Baumaßnahmen thematisiert werden und große Veränderungen mit sich bringen. Die positive Resonanz auf innerstädtische Immobilienprojekte ist alles andere als selbstverständlich, dabei liegen die Interessen häufig eng beieinander. "Man wird natürlich nie alle zufriedenstellen können" aber häufig mangelt es an ausreichender Kommunikation und Aufklärungsarbeit. Die Wissenschaftsarbeit beschäftigt sich mit der Frage, welche Ansprüche an Bürgerkommunikation bestehen und welche Chancen sich daraus für die Kommunikation von Bauprojekten ergeben. Daraus resultiert ein Lösungsansatz für die Immobilien-Public-Relations (PR).
The time-dependent Gutzwiller theory for multi-band Hubbard models
Creators: name: Oelsen, E. v.
name: Seibold, G.
name: Bünemann, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We formulate a multi-band generalisation of the time-dependent Gutzwiller theory. This approach allows for the calculation of general two-particle response functions, which are crucial for an understanding of various experiments in solid-state physics. As a first application, we study the momentum- and frequency-resolved magnetic susceptibility in a two-band Hubbard model. Like in the underlying ground-state approaches we find significant differences between the results of our method and those from a time-dependent Hartree-Fock approximation.
description: 42 pages, 4 figures
Changing patterns in corporate financing and the main bank system in Japan
Creators: name: Campbell, John Y.
name: Hamao, Yasushi
Publisher: name: Columbia University
Year: 1993
Subjects: Economics
Commerce

description: For most of the postwar period, the U.S. and Japan have had polar opposite corporate financial structures. The U.S. system has featured low leverage and low monitoring of corporate management by investors, while the Japanese system has featured high leverage and high monitoring. During the last 15 years, however, the two systems have begun to converge. Leverage has increased in the U.S., particularly when measured by interest expense ratios, and the increase has been concentrated in certain firms. In Japan, leverage has decreased across the board. In the U.S., debt-holders' interests may now be represented more effectively; Jensen (1989) argues that LBO partners are a new organizational form which can monitor corporations more effectively. In Japan, while the role of a main bank as a delegated monitor is similar to the LBO partners in the U.S., the growing use of public debt held by outsiders rather than main banks suggests the opposite trend. This paper uses cross-sectional data to reveal more clearly the changing capital structure of Japanese corporations.
Parity proofs of the Kochen-Specker theorem based on 60 complex rays in four dimensions
Creators: name: Waegell, Mordecai
name: Aravind, P. K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is pointed out that the 60 complex rays in four dimensions associated with a system of two qubits yield over 10^9 critical parity proofs of the Kochen-Specker theorem. The geometrical properties of the rays are described, an overview of the parity proofs contained in them is given, and examples of some of the proofs are exhibited.
description: 17 pages, 13 tables, 3 figures. Several new references have been added
The efficiency of the Tokyo housing market
Creators: name: Ito, Takatoshi
name: Hirono, Keiko N.
Publisher: name: Columbia University
Year: 1992
Subjects: Economics
Commerce

description: We take advantage of annual micro data sets which we have compiled from individual listings in the widely-circulated real estate advertisement magazine. A data set compiled from the "properties for investment" section lists both asking (purchase) prices and rents for the same property. With this data, the price-rent ratio is directly observable and expected capital gains before tax and commissions are found to be just less than 90 percent in ten years. The "repeatedly-listed properties for investment" data set, a subset of the first data set, contains only those units in the same buildings after a one-year interval. In this data set, price, rent, and ex post capital gains are all observable. They are used to show that ex post returns on housing investment in the last four years were actually rather modest. The data set for "housing for purchase" and the data set for "housing for rent" data sections were separately used for hedonic regressions, from which we constructed the hedonic price index and the hedonic rent index. Those regressions show the effects of various determinants for housing prices and rents. The time (year) dummy variables in the hedonic regressions give that estimate of increases in prices and rents in the last eleven years in Tokyo. According to these estimates, prices increased 85 to 90 percent over the 1981-92 period, while rents increased about 65 percent during the same period. The price-(annual) rent ratio rents appears to have fluctuated around a constant ratio between 17 and 32. Finally, the weak-form efficiency of excess returns on housing is rejected. However, the conclusion is tentative considering the small sample of our data.
Sensitivity And Out-Of-Sample Error in Continuous Time Data Assimilation
Creators: name: Bröcker, Jochen
name: Szendro, Ivan G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Data assimilation refers to the problem of finding trajectories of a prescribed dynamical model in such a way that the output of the model (usually some function of the model states) follows a given time series of observations. Typically though, these two requirements cannot both be met at the same time--tracking the observations is not possible without the trajectory deviating from the proposed model equations, while adherence to the model requires deviations from the observations. Thus, data assimilation faces a trade-off. In this contribution, the sensitivity of the data assimilation with respect to perturbations in the observations is identified as the parameter which controls the trade-off. A relation between the sensitivity and the out-of-sample error is established which allows to calculate the latter under operational conditions. A minimum out-of-sample error is proposed as a criterion to set an appropriate sensitivity and to settle the discussed trade-off. Two approaches to data assimilation are considered, namely variational data assimilation and Newtonian nudging, aka synchronisation. Numerical examples demonstrate the feasibility of the approach.
description: submitted to Quarterly Journal of the Royal Meteorological Society
Bloch-Zener oscillations across a merging transition of Dirac points
Creators: name: Lim, Lih-King
name: Fuchs, Jean-Noël
name: Montambaux, Gilles
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Bloch oscillations are a powerful tool to investigate spectra with Dirac points. By varying band parameters, Dirac points can be manipulated and merged at a topological transition towards a gapped phase. Under a constant force, a Fermi sea initially in the lower band performs Bloch oscillations and may Zener tunnel to the upper band mostly at the location of the Dirac points. The tunneling probability is computed from the low energy universal Hamiltonian describing the vicinity of the merging. The agreement with a recent experiment on cold atoms in an optical lattice is very good.
description: 4 pages, 4 figures; (v2) added refs and Supplementary Material with 1 figure
Cytotoxicity towards human alimentary system carcinoma cells resulting from diverse copper(II) complexes
Creators: name: Zhao, Jin’an
name: Peng, Kun
name: Guo, Yan
name: Zhang, Jin
name: Zhao, Dandan
name: Chen, Shufang
name: Hu, Jiyong
Publisher: name: Taylor & Francis
Year: 2014
Subjects: Biochemistry
Space Science
Pharmacology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Cancer

description: To investigate the potential cytotoxicity of copper(II)-based complexes, three coordination compounds with heterocyclic ligands, Cu(pbmbt)Cl2(CH3OH) (1), Cu2(ddbib)2(NO3)4·3CH3OH (2), and Cu3(ttmtmb)2Cl6·2.5H2O (3), which include mononuclear, dinuclear, and trinuclear structures, have been synthesized from reactions of corresponding copper(II) salts with 1-((2-pyrazinyl)-1H-benzoimidazol-1-yl)methyl)-1H-benzotriazole (pbmbt), 2-(2,3-dihydropyrazin-2-yl)-1-((4-((2-(2,3-dihydropyrazin-2-yl)-1H-benzo[d]imidazol-1-yl)methyl)phenyl)methyl)-1H-benzo[d]imidazole (ddbib), and 1,1′,1′′-((2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene)tris(2-methyl-1H-benzoimidazole) (ttmtmb), respectively. IC50 values revealed that 2 and 3 show strong cytotoxicity, whereas 1 is weakly cytotoxic after being tested against a panel of several human alimentary system carcinoma cell lines (SGC7901, EC109, SMMC7721, and HT29). The number of copper centers and different structures could make a tremendous difference on their cytotoxicity. Three coordination compounds with heterocyclic ligands were constructed to investigate the potential cytotoxicity of copper(II)-based complexes. IC50 values revealed that complexes 2 and 3 show strong cytotoxicity, whereas complex 1 is weakly cytotoxic after being tested by MTT assay against a panel of several human alimentary system carcinoma cell lines.
Using a Model Checker to Determine Worst-case Execution Time
Creators: name: Kim, Sungjun
name: Patel, Hiren D.
name: Edwards, Stephen A.
Publisher: name: Columbia University
Year: 2009
Subjects: Computer science

description: Hard real-time systems use worst-case execution time (WCET) estimates to ensure that timing requirements are met. The typical approach for obtaining WCET estimates is to employ static program analysis methods. While these approaches provide WCET bounds, they struggle to analyze programs with loops whose iteration counts depend on input data. Such programs mandate user-guided annotations. We propose a hybrid approach by augmenting static program analysis with model-checking to analyze such programs and derive the loop bounds automatically. In addition, we use model-checking to guarantee repeatable timing behaviors from segments of program code. Our target platform is a precision timed architecture: a SPARC-based architecture promising predictable and repeatable timing behaviors. We use CBMC and illustrate our approach on Euclidean greatest common divisor algorithm (for WCET analysis) and a VGA controller (for repeatable timing validation).
IGF-1 activates c-Abl to regulate PTPα tyrosine phosphorylation and cell migration
Creators: name: Khanna, Ranvikram Singh
Publisher: name: University of British Columbia
Year: 2011

description: Protein tyrosine phosphorylation is an important cellular mechanism that regulates intracellular signalling pathways to control many cellular activities, including proliferation, growth and differentiation. Tyrosine phosphorylation is a reversible process regulated by protein tyrosine kinases and protein tyrosine phosphatases (PTPs) which add and remove phosphate groups from target proteins, respectively. PTPα, a receptor-type member of the classical subfamily of PTPs, functions to activate Src family kinases (SFKs). In integrin signaling, PTPα-activated SFKs act in conjunction with focal adhesion kinase (FAK) to phosphorylate PTPα at a tyrosine residue (Tyr789) near its C-terminus to enable PTPα-dependent promotion of cell migration. Recently, our lab also found that Tyr789 of PTPα is phosphorylated in response to various growth factor stimuli, including IGF-1. However, the kinase and mechanism underlying this growth factor-stimulated phosphorylation and its functional importance in cellular responses were unknown. I investigated IGF-1-dependent phosphorylation of PTPα in mouse embryo fibroblasts lacking the SFKs Src, Yes, and Fyn (SYF cells) and in the SH-SY5Y neuroblastoma cell line. I found that the tyrosine kinase c-Abl was responsible for IGF-1-induced PTPα Tyr789 phosphorylation, and that IGF-1 activated c-Abl. Furthermore, PTPα was found to exist in a constitutive multi-protein complex with RACK1 and the IGF-1R. IGF-1 stimulation resulted in RACK1-dependent recruitment of the kinase c-Abl and phosphorylation of Tyr789 of PTPα. IGF-1-induced migration of SYF cells was dependent upon PTPα Tyr789, and that of SH-SY5Y cells was dependent upon both c-Abl activity and PTPα. My study has revealed an IGF-1-dependent signaling mechanism involving a RACK1-scaffolded multi-protein complex of IGF-1R, c-Abl, and PTPα that regulates c-Abl activity and PTPα tyrosine phosphorylation to promote fibroblast and neuroblastoma cell migration. This is distinct from the integrin-stimulated SFK/FAK-dependent tyrosine phosphorylation of PTPα. Overall, my findings suggest that distinct receptor-mediated signaling pathways converge on PTPα to regulate its phosphorylation and promote cell migration. As aberrant IGF-1/IGF-1 receptor signaling is associated with tumourigenesis and metastasis of several types of cancers, further investigation into the role of IGF-1-regulated PTPα phosphorylation in neuroblastoma cells may reveal potential therapeutic targets for this pediatric tumour and also have broader relevance for the treatment of other types of cancer.