cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Density-Matrix Renormalization Group Study of Extended Kitaev-Heisenberg Model
Creators: name: Shinjo, Kazuya
name: Sota, Shigetoshi
name: Tohyama, Takami
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study an extended Kitaev-Heisenberg model including additional anisotropic couplings by using two-dimensional density-matrix renormalization group method. Calculating the gound-state energy, entanglement entropy, and spin-spin correlation functions, we make a phase diagram of the extended Kitaev-Heisenberg model around spin-liquid phase. We find a zigzag antiferromagnetic phase, a ferromagnetic phase, a 120-degree antiferromagnetic phase, and two kinds of incommensurate phases around the Kitaev spin-liquid phase. Furthermore, we study the entanglement spectrum of the model and find that entanglement levels in the Kitaev spin-liquid phase are degenerate forming pairs but those in the magnetically ordered phases are non-degenerate. The Schmidt gap defined as the energy difference between the lowest two levels changes at the phase boundary adjacent to the Kitaev spin-liquid phase. However, we find that phase boundaries between magnetically ordered phases do not necessarily agree with the change of the Schmidt gap.
description: 11 pages, 15 figures
RECRUTAMENTO E SELEÇÃO: O PREÇO DA ROTATIVIDADE
Creators: name: Sousa, Rodger Roberto Alves de
Publisher: name: Zenodo
Year: 2023

description: Um dos principais fatores que contribuem para o desenvolvimento e o sucesso de uma organização é a presença de colaboradores comprometidos com o seu trabalho. Mas as empresas estão enfrentando grandes dificuldades para reter seus talentos.  Deste modo, o processo de recrutamento e seleção é uma atividade de extrema importância para a organização que procura reter e atender as necessidades internas da empresa, e assim melhorar a forma de atender o público externo. A gestão de pessoas possui uma grande responsabilidade para o bom andamento desses processos, podendo atuar de forma ética, humana e profissional para atender um público tão importante na empresa. Infelizmente quando esse processo não vai bem, a organização pode perder no ato da seleção e após ela, gerando perdas de profissionais que ficaram desmotivados e por constatações que não foram bem sucedidas. Através de uma pesquisa atualizada abordando o tema, poderemos verificar o quanto a empresa possui dificuldade em reter seus talentos, por isso, se faz necessário uma GP "Gestão de Pessoas" comprometida com a visão, missão, objetivo da organização e o valor humano.
title: Butler, Gates und Cyborg
Creators: name: Klappheck, Katharina
Year: 2021

description: Diese Arbeit untersucht die Frage wie Gender in Genderclassifyer eingelassen ist und welche politikwissenschaftliche Interpretation diese Ergebnisse zulassen. Dabei wird die Auditstudie Gendershades Projekt als Fallbeispiel analysiert. In einem Dreischritt werden dabei die a.) Ethischen Zielvorstellung des Gendershades Projekt sogenannte FAT Algorithmen b.) die Funktionsweisen automatischer Gesichtserkennungsanwendungen c.) die Arbeitsteilung innerhalb des Gendershades Projekt analysiert. Dabei wird Gender als eine Technologie verstanden die es künstlicher Intelligenz ermöglicht zu funktionieren. Ausgehen von einem Genderbegriff, der sich an Butlers Idee von Gender als Norm und Barads Konzeption des agentiellen Realismus orientiert, wird binäre Zweigeschlechtlichkeit, als Funktion und nicht als empirischer Fakt der KI Anwendung sichtbar. Dadurch werden Handlungsmöglichkeiten für ein demokratisches Technikdesign möglich, die sich vorrangig auf intersektionale feministische Intervention rund um KI beziehen, wie Community basiertes Benchmark Design.
description: This thesis examines the question: how gender is integrated into gender classifyers and which political science interpretation these results allow. The Gendershades Project is analyzed as a case study. In a three-step process, (a) ethical objectives of the Gendershades project, so-called FAT algorithms, (b) the functionality of automatic facial recognition applications and (c) the division of labor within the Gendershades project are analyzed. Gender is understood as a technology that enables artificial intelligence to function. Focusing on a gender concept that is based on Butler's gender as the norm and Barad's idea of agential realism, gender binary becomes visible as a function and not as an empirical fact of the AI application. This enables options for action for a democratic technology design that primarily relate to intersectional feminist intervention around AI, such as community-based benchmark design.
Switching times in long-overlap Josephson junctions subject to thermal fluctuations and non-Gaussian noise sources
Creators: name: Valenti, Davide
name: Guarcello, Claudio
name: Spagnolo, Bernardo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the superconducting lifetime of long current-biased Josephson junctions, in the presence of Gaussian and non-Gaussian noise sources. In particular, we analyze the dynamics of a Josephson junction as a function of the noise signal intensity, for different values of the parameters of the system and external driving currents. We find that the mean lifetime of the superconductive state is characterized by nonmonotonic behavior as a function of noise intensity, driving frequency and junction length. We observe that these nonmonotonic behaviours are connected with the dynamics of the junction phase string during the switching towards the resistive state. An important role is played by the formation and propagation of solitons, with two different dynamical regimes characterizing the dynamics of the phase string. Our analysis allows to evidence the effects of different bias current densities, that is a simple spatially homogeneous distribution and a more realistic inhomogeneous distribution with high current values at the junction edges. Stochastic resonant activation, noise enhanced stability and temporary trapping phenomena are observed in the system investigated.
description: 16 pages, 9 figures, Physical Review B, in press
title: Berücksichtigung von ESG-Kriterien in der Due-Diligence von Private-Equity-Gesellschaften nach der EU-Offenlegungsverordnung
Creators: name: Schmid, Pia
Publisher: name: FH Vorarlberg (Fachhochschule Vorarlberg)
Year: 2022
Subjects: subject: 000 Allgemeines, Informatik, Informationswissenschaft

description: Der Begriff der Nachhaltigkeit und der damit einhergehende Druck der Gesellschaft auf Unternehmen nimmt stetig zu. Unternehmen haben in den letzten Jahren damit begonnen, nachhaltige Ansätze im Rahmen ihrer wirtschaftlichen Tätigkeit zu integrieren und nach außen hin zu vertreten. Das Ziel dieser Arbeit ist die Entwicklung eines sogenannten ESG-Leitfadens, welcher als zusätzliches Analysewerkzeug im Rahmen einer Unternehmensprüfung von Private-Equity-Gesellschaften eingesetzt werden kann. Der Leitfaden gilt als Leitlinie für die Einhaltung von ESG-Kriterien sowie den Bestimmungen der EU-Offenlegungsverordnung für nachhaltige Finanzprodukte. Im Rahmen einer umfassenden Recherche wurden in einem ersten Schritt bestehende Due-Diligence-Prüfungen auf nachhaltige Aspekte untersucht. Anschließend wurden weitere Kriterien zur Erfüllung der ESG-Aspekte auf Basis einer entwickelten Methodik extrahiert und in den vorgesehenen Leitfaden implementiert. Weiters wurde sichergestellt, dass mit der Anwendung des Leitfadens die Grundzüge der EU-Offenlegungsverordnung eingehalten werden können. In einem abschließend durchgeführten Anwendungstest wurde die Einsatzfähigkeit des Leitfadens bestätigt. Der Erfolg des ESG-Leitfadens, im Hinblick auf einen später darauf zurückzuführenden wirtschaftlichen Erfolg, kann lediglich in Kombination mit weiteren Prüfmethoden sichergestellt werden.
title: Die Blut- und Vampirmotive im Kontext von Vampir-Diskurs & Vampirismus bei Gräfin Elisabeth Nadásdy (geb. Báthory)
Creators: name: Marinov, Erwin
Year: 2021

description: Der Vampir ist eine volkstümliche Figur, welche im Europa des beginnenden 18. Jahrhundert, zu einer regelrechten gesellschaftlichen „Vampir-Manie“ führte. Diesem kulturhistorischen Phantasma, das sich bereits Jahrtausende und Jahrhunderte davor im Natur- und Vorstellungsglauben der Menschen als fixer Bestandteil in ihrer Lebens- und Alltagswelt etablierte, basiert der Vampirismus, also der spezifische Glaube an sog. „Untote“ oder „Vampyri“, die oftmals zwischen Leben und Tod stehen. Dieses dualistische Vorstellungsmodell, das zwischen natürlicher und übernatürlicher Welt unterscheidet, ist bedeutend für das westliche Abendland. Dabei nimmt das Blut als transzendentale Flüssigkeit zwischen diesen Welten-, einen signifikanten abergläubischen Stellenwert bei den Menschen ein. Daraus resultieren ebenso Zu- und Beschreibungsnarrative von Blut und Unsterblichkeit, welche über die Jahrhunderte zum Thema des Vampirismus konstruiert wurden: So auch im Fall der Gräfin Elisabeth Báthory. Die vorliegende Diplomarbeit behandelt die Konstruktion der Motive des „Blutbadens“ und der „Blutbäder“ bei Elisabeth Báthory. Die durch Morde stilisiert wurden, um sog. „Ewige Schönheit“ und „Jugendlichkeit“ zu erlangen. Auf Basis von quellenbasierten Dokumenten zu den Verbrechen der Gräfin-, verfolgt diese Arbeit-, die geschichtswissenschaftliche Aufarbeitung dieser Motive im Kontext des Vampirismus. Im 18. Jahrhundert wurden die Verbrechen zur „Blutmotivkonstruktion im Kontext des Vampirismus“ verwendet und das Bild der „Blutprinzessin“ wurde konstruiert. Die Historische Diskursanalyse soll diese Konstruktionen mit Hilfe der historischen Quellen zum Prozess der E. Báthory-, die expliziten Vampir-Motive erforschen, aufzeigen und so den Nachweis erbringen, dass die Verbrechen der Báthory, weit nach ihrem Tod für den nach ihrem Ableben existierenden Vampir-Glauben adaptiert wurden und dass daraus die gegenwärtigen Vampir-Motive entstanden sind. Die Dokumente verweisen hingegen nicht auf derartige Motive. So entstand ein Kampf zwischen Rationalismus/Aufklärung und Aberglauben in der kulturhistorischen Entwicklung des 18. Jahrhunderts, in der modernen westlichen Gesellschaft und speziell im westungarischen Herrschaftsgebiet des Erzhauses Habsburg im 18. Jahrhundert
Quantum phase transition in a multi-connected superconducting Jaynes-Cummings lattice
Creators: name: Seo, Kangjun
name: Tian, Lin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The connectivity and tunability of superconducting qubits and resonators provide us with an appealing platform to study the many-body physics of microwave excitations. Here we present a multi-connected Jaynes-Cummings lattice model which is symmetric with respect to the nonlocal qubit-resonator couplings. Our calculation shows that this model exhibits a Mott insulator-superfluid-Mott insulator phase transition, featured by a reentry to the Mott insulator phase, at commensurate filling. The phase diagrams in the grand canonical ensemble are also derived, which confirm the incompressibility of the Mott insulator phase. Different from a general-purposed quantum computer, it only requires two operations to demonstrate this phase transition: the preparation and the detection of the commensurate many-body ground state. We discuss the realization of these operations in a superconducting circuit.
description: 8 pages, 6 figures; several references are added, and some corrections are made in the text; published version
Nuclear in-medium effects of strange particles in proton-nucleus collisions
Creators: name: Feng, Zhao-Qing
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Dynamics of strange particles produced in proton induced nuclear reactions near threshold energies has been investigated within the Lanzhou quantum molecular dynamics (LQMD) transport model. The in-medium modifications on particle production in dense nuclear matter are considered through corrections on the elementary cross sections via the effective mass and the mean-field potentials. It is found that the attractive antikaon-nucleon potential enhances the subthreshold $\bar{K}$ production and also influences the structure of inclusive spectra. The strangeness production is strongly suppressed in proton induced reactions in comparison to heavy-ion collisions. The measured K$^{-}$/K$^{+}$ ratios in the $^{12}$C+$^{12}$C and p+$^{12}$C collisions from KaoS collaboration have been well explained with inclusion of the in-medium potentials.
description: 7 pages, 5 figures
Indications of a late-time interaction in the dark sector
Creators: name: Salvatelli, Valentina
name: Said, Najla
name: Bruni, Marco
name: Melchiorri, Alessandro
name: Wands, David
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that a general late-time interaction between cold dark matter and vacuum energy is favoured by current cosmological datasets. We characterize the strength of the coupling by a dimensionless parameter $q_V$ that is free to take different values in four redshift bins from the primordial epoch up to today. This interacting scenario is in agreement with measurements of cosmic microwave background temperature anisotropies from the Planck satellite, supernovae Ia from Union 2.1 and redshift space distortions from a number of surveys, as well as with combinations of these different datasets. We show that a non-zero interaction is very likely at late times. We then focus on the case $q_V\not=0$ in a single low-redshift bin, obtaining a nested one parameter extension of the standard $Λ$CDM model. We study the Bayesian evidence, with respect to $Λ$CDM, of this late-time interaction model, finding moderate evidence for an interaction starting at $z=0.9$, dependent upon the prior range chosen for the interaction strength parameter $q_V$. For this case the null interaction ($q_V=0$, i.e.$Λ$CDM) is excluded at 99% c.l..
description: version to appear in PRL, 6 pages, 6 figures
title: Bringing context to just-in-time adaptive interventions (JITAIs) based on stress monitoring using HRV
Creators: name: Lerch, Matthias
Publisher: name: FH Vorarlberg (Fachhochschule Vorarlberg)
Year: 2022
Subjects: subject: 004 Informatik

description: With the rise of people wearing smartwatches and the ever-lasting issue of stress, there has been an interest in detecting stress with wearables in real-time. This allows for interventions that take place exactly when stress occurs. However, many situations require all of our attention, making them unsuitable for any interventions. Additionally, many approaches currently do not factor in this aspect, running the risk of offering users undesirable interventions. This thesis examines how contextual user information can be incorporated into a stress intervention system to reduce undesirable intervention timings. The system is split into detecting stress using heart rate variability (HRV) metrics obtained from a photoplethysmography (PPG) signal, and inferring user context from available sensor data. It is evaluated with a simulation-based approach using daily schedules of created personas and randomly sampled stressors during daily life. The results obtained indicate the benefit of adding contextual user information to a stress intervention system. Depending on the busyness of the schedule, it can greatly decrease the number of received interventions. However, as these findings are attained without performing a user testing, it is unclear how they compare to results from real-world usage.
title: Die Entwicklung der Nachhaltigkeitsberichtserstattung von Großunternehmen
title: Eine empirische Analyse der DAX-40-Unternehmen
titleType: Subtitle
Creators: name: Bail, Sebastian
Publisher: name: FH Vorarlberg (Fachhochschule Vorarlberg)
Year: 2022
Subjects: subject: 330 Wirtschaft

description: Das Thema Nachhaltigkeit wurde in den letzten Jahren zu einer stetig wachsenden Herausforderung für Unternehmen, welche sich in einer Nachhaltigkeitsberichtserstattung (kurz: NBE) etablierte. Die vorliegende Untersuchung der Entwicklung der NBE der DAX-40-Unternehmen basiert auf einem Kategorienkatalog, eigens entwickelt aus den SDGs. Hiermit ist es möglich Umfang und Metadaten der Berichte in einem standardisierten und vergleichbaren Format festzuhalten. Diese Informationen wurden mithilfe deskriptiver Betrachtung und statistischer Methoden ausgewertet. Dadurch wird aufgezeigt, dass trotz der quantitativen Entwicklung der Berichte und vermehrter Behandlung nachhaltiger Themen, diese inhaltlich sehr stark, aufgrund einer fehlenden Standardisierung bzw. Verpflichtung für die Publikation von Nachhaltigkeitsthemen, variieren. Dies führt dazu, dass sowohl der Vergleich von Berichten zwischen Unternehmen als auch von unterschiedlichen Berichten desselben Unternehmens nur mit sehr hohem Aufwand möglich ist. Sinnvoll wäre die weiterführende Forschung im Bereich der NBE für Großunternehmen nach Inkrafttreten der Regelungen der CSRD und im Speziellen der Vergleich der Nachhaltigkeitsberichtserstattung vor und nach der Standardisierung.
description: In recent years, the topic of sustainability has become a steadily growing challenge for companies, which has established itself in sustainability reporting. This study of the development of the sustainability reporting of the DAX-40-companies is based on a catalogue of categories specially developed from the SDGs. This makes it possible to record the scope and metadata of the reports in a standardised and comparable format. This information was analysed using descriptive observation and statistical methods. This shows that despite the quantitative development of the reports and the increased treatment of sustainable topics, their content varies greatly due to a lack of standardisation or obligation for the publication of sustainability topics. This leads to the fact that the comparison of reports between companies as well as of different reports of the same company is only possible with a great deal of effort. It would make sense to conduct further research in the field of sustainability reporting for large companies after the regulations of the CSRD have come into force and, in particular, to compare sustainability reporting before and after standardisation.
title: Verlagerung der Fachhochschule - Chance für neue Funktionen in der Wiener Neustädter Innenstadt?
Creators: name: Silvestri, Lilian
Year: 2021

description: Das Innenstadtsterben von Kleinstädten hat in den letzten Jahren zugenommen und auch Wiener Neustadt ist von dieser Entwicklung betroffen. Das veränderte Konsum- und Mobilitätsverhalten unserer Gesellschaft begünstigt diesen Zustand. Um dieser Situation entgegenzuwirken, setzt die Stadtregierung auf unterschiedliche Maßnahmen. Eine davon ist die Umsiedelung des Wirtschaftssektors der Fachhochschule in das ehemalige Karmeliterkloster, welches sich in der Wiener Neustädter Innenstadt befindet. Die Diplomarbeit beschäftigte sich mit der Standortverlagerung der Fachhochschule in die Wiener Neustädter Innenstadt als Impuls zur Aufwertung des Ortskerns. Durch die Verlagerung des Standorts der Fachhochschule in die Innenstadt, ist das Potenzial einer „neuen Zielgruppe“, die der Studierenden, vorhanden. Diese können durch ihren Lebensstil und ihre Bedürfnisse nach Unternehmungen und Geselligkeit die Stadt positiv beeinflussen. Diese Veränderungen können als Antrieb zur Ortskernbelebung genutzt werden. Es kamen dabei folgende Fragestellungen auf: Eignet sich Wiener Neustadt prinzipiell als Studierendenstadt? Was muss dafür getan werden, damit es dazu kommen kann? Mithilfe der Untersuchung sollte eine Antwort auf die Frage gefunden werden, wie die Standort-verlagerung der Fachhochschule in die Wiener Neustädter Innenstadt sowohl eine Aufwertung für den Ortskern erwirken als auch eine Qualitätsverbesserung für Studierende darstellen kann. Um dies zu ermöglichen, sollten Maßnahmen umgesetzt werden, welche in Form von Handlungsempfehlungen erarbeitet wurden. Zusätzlich gaben die Ergebnisse der Interviews mit ExpertInnen aus anderen Studierenden-städten wie Aachen, Graz, Krems und Leipzig Aufschluss über deren „Good Practice Beispiele“ und wurden auf ihre Anwendbarkeit auf das Untersuchungsgebiet geprüft. Die Expertise der anderen Hochschulregionen kann dazu beitragen, Wiener Neustadt als zukünftige Stadt der Studierenden zu positionieren. Indem man die jungen Menschen nach ihren Bedürfnissen befragt und herausfindet, welche Ansprüche sie an Wiener Neustadt als mögliche „Studierendenstadt“ haben, kann dieses Vorhaben realisiert werden. Im Idealfall können die ausgearbeiteten Handlungsempfehlungen in die Realität umgesetzt und von den Studierenden und BewohnerInnen genutzt werden.
Probabilistic description of extreme events in intermittently unstable systems excited by correlated stochastic processes
Creators: name: Mohamad, Mustafa A.
name: Sapsis, Themistoklis P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Dynamical Systems (math.DS)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this work, we consider systems that are subjected to intermittent instabilities due to external stochastic excitation. These intermittent instabilities, though rare, have a large impact on the probabilistic response of the system and give rise to heavy-tailed probability distributions. By making appropriate assumptions on the form of these instabilities, which are valid for a broad range of systems, we formulate a method for the analytical approximation of the probability distribution function (pdf) of the system response (both the main probability mass and the heavy-tail structure). In particular, this method relies on conditioning the probability density of the response on the occurrence of an instability and the separate analysis of the two states of the system, the unstable and stable state. In the stable regime we employ steady state assumptions, which lead to the derivation of the conditional response pdf using standard methods for random dynamical systems. The unstable regime is inherently transient and in order to analyze this regime we characterize the statistics under the assumption of an exponential growth phase and a subsequent decay phase until the system is brought back to the stable attractor. The method we present allows us to capture the statistics associated with the dynamics that give rise to heavy-tails in the system response and the analytical approximations compare favorably with direct Monte Carlo simulations, which we illustrate for two prototype intermittent systems: an intermittently unstable mechanical oscillator excited by correlated multiplicative noise and a complex mode in a turbulent signal with fixed frequency, where multiplicative stochastic damping and additive noise model interactions between various modes.
description: 29 pages, 15 figures
title: Das Phänomen der „österreichischen Identitäten“ im 20. Jahrhundert bis in die Gegenwart
Creators: name: Kopf, Emanuel
Year: 2021

description: In dieser Diplomarbeit steht die historische Identität Österreichs im Zentrum der wissenschaftlichen Diskussion. Zunächst erfolgt eine theoretische Annäherung an den vielschichtigen Begriff der Identität und dessen Verwobenheit mit dem Kollektivbewusstsein. Anschließend wird im Zeitraum von 1918 bis in die Gegenwart das Phänomen der ‚österreichischen Identitäten‘ anhand der jeweilig vorherrschenden Identitätsangebote analysiert. Besondere Aufmerksamkeit kommt dabei den politischen Akteuren zu, die als wesentliche Konstrukteure der Identitätsangebote gelten. Von besonderem Interesse sind die Epochen Erste Republik, Dollfuß-Schuschnigg-Diktatur, Anschluss und NS-Diktatur sowie Zweite Republik. Aus diesen werden sog. Marksteine der österreichischen Identität herausgearbeitet. Es wird der Versuch unternommen, Spannungsfelder, Krisen, Einschnitte und Kontinuitäten, die bei diesem Konstruktionsprozess auftreten, kritisch zu beleuchten.
Space Diplomacy and the Artemis Accords
Creators: name: Riordan, Nancy
name: Machoň, Miloslav
name: Csajková, Lucia
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 440808
subject: International relations

description: The growth of human activity in outer space is attracting more International Relations (IR) scholar’s attention, enabling an understanding of the involvement of specific groups of actors and the dynamics of political negotiations that lead to concluding agreements on using outer space for peaceful purposes. This paper provides analysis based on the triangulation of qualitative data gathered via document analysis and in-depth semi-structured expert interviews to gain insight into the involvement of the actors responsible for the negotiations that led to the Artemis Accords and their diplomatic communication style. The results identified different uses of public and private diplomatic communication for advancing norms of behaviour and transparency. Negotiators used public diplomatic communication in order to influence foreign governments on the need for norms of behaviour and transparency to further peaceful space exploration beyond low Earth orbit. Private diplomatic communication facilitated the inclusion of commercial partners.
Fast radio bursts: search sensitivities and completeness
Creators: name: Keane, E. F.
name: Petroff, E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this paper we identify some sub-optimal performance in algorithms that search for Fast Radio Bursts (FRBs), which can reduce the cosmological volume probed by over 20%, and result in missed discoveries and incorrect flux density and sky rate determinations. Re-calculating parameters for all of the FRBs discovered with the Parkes telescope (i.e. all of the reported FRBs bar one), we find some inconsistencies with previously determined values, e.g. FRB 010125 was approximately twice as bright as previously reported. We describe some incompleteness factors not previously considered which are important in determining accurate population statistics, e.g. accounting for fluence incompleteness the Thornton et al. all-sky rate can be re-phrased as ~2500 FRBs per sky per day above a 1.4-GHz fluence of ~2 Jy ms. Finally we make data for the FRBs easily available, along with software to analyse these.
description: Accepted for publication in MNRAS, 5 pages, 2 figures, 2 tables. FRB data to appear on Research Data Australia upon publication in MNRAS
title: Auswirkungen der CO2-Steuer auf das Nachhaltigkeitscontrolling
title: Eine empirische Untersuchung anhand Vorarlberger Großunternehmen
titleType: Subtitle
Creators: name: Tripolt, Nadine
Publisher: name: FH Vorarlberg (Fachhochschule Vorarlberg)
Year: 2022
Subjects: subject: 330 Wirtschaft

description: Um die Nachhaltigkeitsziele der Vereinten Nationen in Österreich zu erreichen, wird ab Juli 2022 die CO2-Steuer erhoben. In diesem Kontext fehlen für den Standort Vorarlberg jedoch Aussagen über das Nachhaltigkeitscontrolling im Allgemeinen und die Auswirkungen der CO2-Steuer im Speziellen. Zur Beantwortung der Forschungsfragen wurde eine Online-Umfrage konzipiert, durchgeführt und statistisch quantitativ ausgewertet. Das entwickelte Nachhaltigkeits-Scoring-System soll klären, inwieweit die teilnehmenden Unternehmen, ein Nachhaltigkeitscontrolling implementiert haben. Zudem wurde geprüft, ob die CO2-Steuer einen Zusammenhang mit dem ermittelten Nachhaltigkeitsscore hat. Der Mittelwert des Nachhaltigkeitsscore betrug 56,23 %, wobei die Ergebnisse eine hohe Variabilität (10 % bis 100 %) aufwiesen. In einigen Unternehmen wird nur ein rudimentäres Nachhaltigkeitscontrolling durchgeführt, während andere bereits sehr aktiv sind. Die Wirkung der CO2-Steuer ist sehr unterschiedlich. Der Korrelationskoeffizient nach Pearson ergibt zwar 0,053 und ist damit positiv (r > 0), dieser ist aber sehr schwach. Die Signifikanz (1-seitig) liegt bei p = 0,352. Somit wurde nachgewiesen, dass kein eindeutiger Zusammenhang zwischen der CO2-Bepreisung und dem Nachhaltigkeitsscore in Vorarlberg besteht.
description: In order to achieve the sustainability target of the United Nations in Austria, the CO2 tax will be introduced in July 2022. In this context, however, statements about sustainability controlling in general and the effects of the CO2 tax in particular are missing for the location Vorarlberg. To answer the research questions, an online survey was designed, conducted and statistically quantitatively evaluated. The sustainability scoring system developed is designed to clarify the extent to which the participating companies have implemented sustainability controlling. In addition, it was examined whether the CO2 tax has a connection with the determined sustainability score. The mean value of the sustainability score was 56.23 %, whereby the results showed a high variability (10 % to 100 %). In some companies, only rudimentary sustainability controlling is carried out, while others are already very active. The effect of the CO2 tax varies considera-bly. Although the Pearson correlation coefficient is 0.053 and thus positive (r > 0), it is very weak. The significance (1-sided) is p = 0.352. Thus, it was proven that there is no clear correlation between CO2 pricing and the sustainability score in Vorarlberg.
Unified picture of the doping dependence of superconducting transition temperatures in alkali metal/ammonia intercalated FeSe
Creators: name: Guterding, Daniel
name: Jeschke, Harald O.
name: Hirschfeld, P. J.
name: Valenti, Roser
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In the recently synthesized Li$_x$(NH$_2$)$_y$(NH$_3$)$_z$Fe$_2$Se$_2$ family of iron chalcogenides a molecular spacer consisting of lithium ions, lithium amide and ammonia separates layers of FeSe. It has been shown that upon variation of the chemical composition of the spacer layer, superconducting transition temperatures can reach $T_c\sim 44 \mathrm{K}$, but the relative importance of the layer separation and effective doping to the $T_c$ enhancement is currently unclear. Using state of the art band structure unfolding techniques, we construct eight-orbital models from ab-initio density functional theory calculations for these materials. Within an RPA spin-fluctuation approach, we show that the electron doping enhances the superconducting pairing, which is of $s_\pm$-symmetry and explain the experimentally observed limit to $T_c$ in the molecular spacer intercalated FeSe class of materials.
Real-time dynamics of spin-dependent transport through a double-quantum-dot Aharonov-Bohm interferometer with spin-orbit interaction
Creators: name: Tu, Matisse Wei-Yuan
name: Aharony, Amnon
name: Zhang, Wei-Min
name: Entin-Wohlman, Ora
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The spin-resolved non-equilibrium real-time electron transport through a double-quantum-dot (DQD) Aharonov-Bohm (AB) interferometer with spin-orbit interaction (SOI) is explored. The SOI and AB interference in the real-time dynamics of spin transport is expressed by effective magnetic fluxes. Analytical formulae for the time-dependent currents, for initially unpolarized spins, are presented. In many cases, there appear spin currents in the electrodes, for which the spins in each electrode are polarized along characteristic directions, pre-determined by the SOI parameters and by the geometry of the system. Special choices of the system parameters yield steady-state currents in which the spins are fully polarized along these characteristic directions. The time required to reach this steady state depends on the couplings of the DQD to the leads. The magnitudes of the currents depend strongly on the SOI-induced effective fluxes. Without the magnetic flux, the spin-polarized current cannot be sustained to the steady states, due to the phase rigidity for this system. For a non-degenerate DQD, transient spin transport can be produced by the sole effects of SOI. We also show that one can extract the spin-resolved currents from measurements of the total charge current.
description: accepted for publication in Phys. Rev. B
Space Diplomacy and the Artemis Accords
Creators: name: Machoň, Miloslav
name: Riordan, Nancy
name: Csajková, Lucia
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 440808
subject: International relations

description: The growth of human activity in outer space is attracting more International Relations (IR) scholar’s attention, enabling an understanding of the involvement of specific groups of actors and the dynamics of political negotiations that lead to concluding agreements on using outer space for peaceful purposes. This paper provides analysis based on the triangulation of qualitative data gathered via document analysis and in-depth semi-structured expert interviews to gain insight into the involvement of the actors responsible for the negotiations that led to the Artemis Accords and their diplomatic communication style. The results identified different uses of public and private diplomatic communication for advancing norms of behaviour and transparency. Negotiators used public diplomatic communication in order to influence foreign governments on the need for norms of behaviour and transparency to further peaceful space exploration beyond low Earth orbit. Private diplomatic communication facilitated the inclusion of commercial partners.
Magnetar activity mediated by plastic deformations of neutron star crust
Creators: name: Lyutikov, Maxim
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We advance a "Solar flare" model of magnetar activity, whereas a slow evolution of the magnetic field in the upper crust, driven by electron MHD (EMHD) flows, twists the external magnetic flux tubes, producing persistent emission, bursts and flares. At the same time the neutron star crust plastically relieves the imposed magnetic field stress, limiting the strain $ ε_t $ to values well below the critical strain $ ε_{crit}$ of a brittle fracture, $ ε_t \sim 10^{-2}ε_{crit} $. Magnetar-like behavior, occurring near the magnetic equator, takes place in all neutron stars, but to a different extent. The persistent luminosity is proportional to cubic power of the magnetic field (at a given age), and hence is hardly observable in most rotationally powered neutron stars. Giant flares can occur only if the magnetic field exceeds some threshold value, while smaller bursts and flares may take place in relatively small magnetic fields. Bursts and flares are magnetospheric reconnection events that launch Alfven shocks which convert into high frequency whistlers upon hitting the neutron star surface. The resulting whistler pulse induces a strain that increases with depth both due to the increasing electron density (and the resulting slowing of the waves), and due to the increasing coherence of a whistler pulse with depth. The whistler pulse is dissipated on a time scale of approximately a day at shallow depths corresponding to $ρ\sim 10^{10} {\rm g cm}^{-3}$; this energy is detected as enhanced post-flare surface emission.
description: 26 pages, 3 figures
title: Grüne Anleihen in der DACH-Region
title: Eine empirische Analyse grüner Anleihen von ATX-, DAX- und SMI-Unternehmen
titleType: Subtitle
Creators: name: Kegele, Silvana
Publisher: name: FH Vorarlberg (Fachhochschule Vorarlberg)
Year: 2022
Subjects: subject: 300 Sozialwissenschaften

description: Grüne Anleihen gewinnen als Finanzierungsinstrument für Unternehmen zunehmend an Interesse. Ziel der Masterarbeit ist es, Unternehmen für die zukünftige Emission von grünen Anleihen Handlungsempfehlungen für die Ausgestaltung des Green Bond Frameworks (GBF) und der Anleihebedingungen zu bieten. Die theoretische Annäherung an die Begriffe grüne Finanzierung sowie grüne Anleihen bildet den Rahmen für die empirische Untersuchung und gibt Hinweise auf Erfolgsfaktoren für die Erzielung einer grünen Prämie (Greenium). Anschließend werden die GBFs sowie die Ausstattungsmerkmale der grünen Anleihen von ATX-, DAX- und SMI-Unternehmen inhaltsanalytisch ausgewertet. Die Analyse belegt, dass die Emittentinnen in den GBFs unterschiedlich strenge Kriterien für die Verwaltung und Verwendung der Emissionserlöse von grünen Anleihen festlegen. Auf Basis dieser ordinal skalierten Konditionen wird ein Qualitätsindex entwickelt, der einen einfachen Vergleich von GBFs ermöglicht und gemeinsam mit den aus der Theorie abgeleiteten Er-folgsfaktoren die Basis für einen Kriterienkatalog für die Ausgestaltung von GBFs und Anleihekonditionen von grünen Anleihen bildet.
description: Green bonds are gaining increasing interest as a financing instrument for companies. The aim of this master thesis is to provide companies with recommendations for the design of the Green Bond Framework (GBF) and the bond conditions for the future issuance of green bonds. The theoretical approach to the concepts of green financing as well as green bonds provides the framework for the empirical investigation and gives indications on success factors for achieving a green premium (greenium). Subsequently, the GBFs as well as the features of the green bonds of ATX, DAX and SMI companies are evaluated by using content analysis. The analysis shows that the issuers set criteria of varying strictness for the management and use of the green bond proceeds in their GBFs. Based on these conditions which can be ordinally scaled, a quality index is developed that enables an easy compari-son of GBFs and, together with the success factors derived from the theoretical analysis, forms the foundation for a catalogue of criteria for the design of both, GBFs as well as the bond conditions of green bonds.
Maximum Hands-Off Control: A Paradigm of Control Effort Minimization
Creators: name: Nagahara, M.
name: Quevedo, D. E.
name: Nesic, D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Systems and Control (eess.SY)
subject: Information Theory (cs.IT)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In this paper, we propose a new paradigm of control, called a maximum hands-off control. A hands-off control is defined as a control that has a short support per unit time. The maximum hands-off control is the minimum support (or sparsest) per unit time among all controls that achieve control objectives. For finite horizon control, we show the equivalence between the maximum hands-off control and L1-optimal control under a uniqueness assumption called normality. This result rationalizes the use of L1 optimality in computing a maximum hands-off control. We also propose an L1/L2-optimal control to obtain a smooth hands-off control. Furthermore, we give a self-triggered feedback control algorithm for linear time-invariant systems, which achieves a given sparsity rate and practical stability in the case of plant disturbances. An example is included to illustrate the effectiveness of the proposed control.
description: IEEE Transactions on Automatic Control, 2015 (to appear)
Medical Image Segmentation using LeViT-UNet++: A Case Study on GI Tract Data
Creators: name: Nemani, Praneeth
name: Vollala, Satyanarayana
Publisher: name: arXiv
Year: 2022
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Gastro-Intestinal Tract cancer is considered a fatal malignant condition of the organs in the GI tract. Due to its fatality, there is an urgent need for medical image segmentation techniques to segment organs to reduce the treatment time and enhance the treatment. Traditional segmentation techniques rely upon handcrafted features and are computationally expensive and inefficient. Vision Transformers have gained immense popularity in many image classification and segmentation tasks. To address this problem from a transformers' perspective, we introduced a hybrid CNN-transformer architecture to segment the different organs from an image. The proposed solution is robust, scalable, and computationally efficient, with a Dice and Jaccard coefficient of 0.79 and 0.72, respectively. The proposed solution also depicts the essence of deep learning-based automation to improve the effectiveness of the treatment
description: Paper accepted at the 26th International Computer Science and Engineering Conference (ICSEC)
title: Zweckmäßigkeit der IFRS Berichterstattung für KMU
title: Eine empirische Untersuchung aus Sicht der Anteilseigner in Deutschland
titleType: Subtitle
Creators: name: von Knobloch, Ferdinand
Publisher: name: FH Vorarlberg (Fachhochschule Vorarlberg)
Year: 2022
Subjects: subject: 300 Sozialwissenschaften

description: In den 13 Jahren seit Einführung der IFRS für KMU in Deutschland belegen mehrere Studien, dass dieser Standard, entgegen der Erwartungen, keine Erfolge im Bereich der Anwenderzahlen erzielen konnte. Trotz der Entwicklung eines international angepassten und auf die Bedürfnisse der KMU fokussierten Rechnungslegungsstandards, blieb eine Etablierung innerhalb der KMU aus. Ziel dieser Arbeit ist die Analyse, inwiefern eine doppelte Rechnungslegung nach IFRS und HGB wirtschaftliche und geschäftsanalytische Vorteile für die Anteilseigner deutscher KMU generiert. Aufbauend auf der beschriebenen Zielsetzung gilt es zu überprüfen, welche Anteilseigner deutscher KMU von dem doppelten Rechnungslegungsstandard adressiert werden und ferner, in welchem Ausmaß eine höhere Bedürfnisbefriedigung resultiert. Zunächst erfolgt im Rahmen einer umfassenden Literaturrecherche eine Untersuchung der Anteilseigner deutscher KMU und deren Anforderungen an ein Rechnungslegungssystem. Anschließend findet eine Überprüfung möglicher Vorteile statt, welche die Anwendung der IFRS für KMU befürworten würden. Darüber hinaus wurden zehn Experteninterviews durchgeführt mit der Intention, erworbene Erkenntnisse zu revidieren und überdies neue zu generieren. In einer abschließenden Inhaltsextraktion werden die gewonnen Annahmen artikuliert und anschließend interpretiert, um die zugrundeliegende Forschungsfrage zu beantworten.
description: 13 years since the introduction of IFRS for SMEs in Germany, several studies have shown that contrary to expectations, this standard has not been successful in leading to higher user numbers. Despite the development of an internationally adapted accounting standard focused on the needs of SMEs, it failed to establish itself within SMEs. The objective of this study is to determine whether dual accounting according to IFRS and HGB generates economic and business analytical advantages for the shareholders of German SMEs. Furthermore, shareholders of German SMEs are to be identified, who are addressed by the dual accounting standard and to what extend it results in a higher satisfaction of needs. First, a comprehensive review of the literature is conducted to determine/define the shareholders of German SMEs and their requirements for an accounting system. This is followed by the assessment of possible benefits supporting the application of IFRS for SMEs. Finally, ten expert interviews were conducted to revise acquired findings and the aim to generate new ones. In a final content extraction, the results of this analysis are articulated and subsequently interpreted in order to answer the underlying research question.
SN2014J gamma-rays from the 56Ni decay chain
Creators: name: Diehl, Roland
name: Siegert, Thomas
name: Hillebrandt, Wolfgang
name: Krause, Martin
name: Greiner, Jochen
name: Maeda, Keiichi
name: Röpke, Friedrich K.
name: Sim, Stuart A.
name: Wang, Wei
name: Zhang, Xiaoling
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The measurement of gamma-ray lines from the decay chain of 56Ni provides unique information about the explosion in supernovae. The 56Ni freshly-produced in the supernova powers the optical light curve, as it emits gamma-rays upon its radioactive decay to 56Co and then 56Fe. Gamma-ray lines from 56Co decay are expected to become directly visible through the overlying white dwarf material several weeks after the explosion, as they progressively penetrate the overlying material of the supernova envelope, diluted as it expands. The lines are expected to be Doppler-shifted or broadened from the kinematics of the 56Ni ejecta. With the SPI spectrometer on INTEGRAL and using an improved instrumental background method, we detect the two main lines from 56Co decay at 847 and 1238 keV from SN2014J at 3.3 Mpc, significantly Doppler-broadened, and at intensities (3.65+/-1.21) 10^-4 and (2.27+/-0.69) 10^-4 ph cm^-2s^-1, respectively, at brightness maximum. We measure their rise towards a maximum after about 60-100 days and decline thereafter. The intensity ratio of the two lines is found consistent with expectations from 56Co decay (0.62+/-0.28 at brightness maximum, expected is 0.68). We find that the broad lines seen in the late, gamma-ray transparent phase are not representative for the early gamma-ray emission, and rather notice the emission spectrum to be complex and irregular until the supernova is fully transparent to gamma-rays, with progressive uncovering of the bulk of 56Ni. We infer that the explosion morphology is not spherically symmetric, both in the distribution of 56Ni and of the unburnt material which occults the 56Co emission. Comparing light curves from different plausible models, the resulting 56Ni mass is determined as 0.49+/-0.09 M_sol.
description: 8 pages, 6 figures. Accepted for publication in A&A
Toward 6G with Terahertz Communications: Understanding the Propagation Channels
Creators: name: Cai, Xuesong
name: Cheng, Xiang
name: Tufvesson, Fredrik
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This article aims at providing insights for a comprehensive understanding of terahertz (THz) propagation channels. Specifically, we discuss essential THz channel characteristics to be well understood for the success of THz communications. The methodology of establishing realistic and 6G-compliant THz channel models based on measurements is then elaborated on, followed by a discussion on existing THz channel measurements in the literature. Finally, future research directions, challenges and measures to enrich the understanding of THz channels are discussed.
description: The final version can be found in IEEE Communications Magazine