cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Auf dem queeren Auge blind
Creators: name: Winter, Lisa
Year: 2023

description: Thema dieser Masterarbeit ist die ideologische Grundlage der Coronamaßnahmen und ihre Auswirkungen auf queere Beziehungs- und Familienmodelle. Die leitgebenden Forschungsfragen sind erstens, welche Formen von Familie und Beziehung durch die von der deutschen Bundesregierung veranlassten Coronamaßnahmen zwischen März 2020 und März 2021 als Grundbedürfnis definiert und lebbar gemacht wurden. Hierzu wird eine kritische Diskursanalyse nach Siegfried Jäger anhand der Bund-Länder-Beschlüsse durchgeführt. Und zweitens, die Bedeutung der Maßnahmen für Beziehungs- und Familienmodelle fernab der Heteronormativität. Hierzu werden dialogisch-narrative Interviews geführt und diese anschließend mittels einer qualitativen Inhaltsanalyse angelehnt an Udo Kuckartz ausgewertet. Die Ergebnisse dieser Untersuchungen zeigen, dass Regelungen zu Kontaktbeschränkungen einem heteronormativen und traditionellen Bild von Familie und Beziehung folgen. Die Maßnahmen sind biopolitisch und gewaltsam, da sie normative und reproduktive Beziehungs- und Familienmodelle ermöglichen. Queere und nicht-reproduktive Beziehungs- und Familienmodelle werden hingegen verunmöglicht. Diese können nur gelebt werden, indem sich die Personen der Heteronormativität unterwerfen. Die Personen sind gezwungen Hierarchisierungen und familiäre Kategorisierungen von Bezugspersonen vorzunehmen. Mit den Maßnahmen wurden außerdem nur heteronormative und cisnormative Subjekte anerkannt. Bei den interviewten Personen zeigt sich eine prekäre und bruchhafte Subjektivität, die unter anderem durch Zerrissenheit, Abgrenzung, Vertuschung und Einsamkeit deutlich wird. Die Ergebnisse dieser Arbeit knüpfen an bisherige Forschungen zum heteronormativen Staat, institutionalisierten Gewaltverhältnissen und Biopolitik an. Die Arbeit erweitert den Diskurs der Pandemiepolitik um eine queere Perspektive und diskutiert Heteronormativität und Biopolitik an einem aktuellen Beispiel.
Polarization-gradient cooling in a strong doughnut-mode dipole potential
Creators: name: Kuppens, S.
name: Rauner, M.
name: Schiffer, M.
name: Sengstock, K.
name: Ertmer, Wolfgang
name: Van Dorsselaer, F.E.
name: Nienhuis, G.
Publisher: name: American Physical Society
Year: 1998
Subjects: subject: neon atoms
subject: doughnut mode
subject: cooling
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present experimental and theoretical studies of polarization-gradient cooling of metastable neon atoms confined to the dark center of a TEM*01 (doughnut) mode. A slow beam of neon atoms is guided and focused inside a blue-detuned and focused doughnut-mode laser beam to a spot size below 10 μm. The transverse motion inside this doughnut mode is cooled by means of two-dimensional optical molasses. We observed non-Gaussian two-component velocity distributions of which the cold component has a width of down to three recoil velocities. These results are found to be in qualitative agreement with a quantum Monte Carlo simulation of cooling in one dimension in the presence of an external light-shift potential. For the simulation we apply the recently developed technique of quantum-state diffusion with adaptive noise.
Kinematic classification of non-interacting spiral galaxies
Creators: name: Wiegert, Theresa
name: English, Jayanne
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using neutral hydrogen (HI) rotation curves of 79 galaxies, culled from the literature, as well as measured from HI data, we present a method for classifying disk galaxies by their kinematics. In order to investigate fundamental kinematic properties we concentrate on non-interacting spiral galaxies. We employ a simple parameterized form for the rotation curve in order to derive the three parameters: the maximum rotational velocity, the turnover radius and a measure of the slope of the rotation curve beyond the turnover radius. Our approach uses the statistical Hierarchical Clustering method to guide our division of the resultant 3D distribution of galaxies into five classes. Comparing the kinematic classes in this preliminary classification scheme to a number of galaxy properties we find that our class containing galaxies with the largest rotational velocities has a mean morphological type of Sb/Sbc while the other classes tend to later types. Other trends also generally agree with those described by previous researchers. In particular we confirm correlations between increasing maximum rotational velocity and the following observed properties: increasing brightness in B-band, increasing size of the optical disk (D_25) and increasing star formation rate (as derived using radio continuum data). Our analysis also suggests that lower velocities are associated with a higher ratio of the HI mass over the dynamical mass. Additionally, three galaxies exhibit a drop in rotational velocity amplitude of >~ 20% after the turnover radius. However recent investigations suggest that they have interacted with minor companions which is a common cause for declining rotation curves. (Figures 12, 14, 16 and 17 are interactive in the electronic pdf version of this paper.)
description: 41 pages, 21 figures, Wiegert, T. & English, J., "Kinematic classification of non-interacting spiral galaxies", New Astronomy (2013)
Posterior samples of the parameters of binary black holes from Advanced LIGO, Virgo's second observing run
Creators: name: De, Soumi
name: Biwer, Christopher M.
name: Capano, Collin D.
name: Nitz, Alexander H.
name: Brown, Duncan A.
Publisher: name: Basel : MDPI AG
Year: 2019
Subjects: subject: black hole
subject: probability
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: This paper presents a parameter estimation analysis of the seven binary black hole mergers-GW170104, GW170608, GW170729, GW170809, GW170814, GW170818, and GW170823-detected during the second observing run of the Advanced LIGO and Virgo observatories using the gravitational-wave open data. We describe the methodology for parameter estimation of compact binaries using gravitational-wave data, and we present the posterior distributions of the inferred astrophysical parameters. We release our samples of the posterior probability density function with tutorials on using and replicating our results presented in this paper.
title: Daumier oder die Ohnmacht des engagierten bürgerlichen Individuums
Creators: name: Eberle, Matthias
Publisher: name: University Library Heidelberg
Year: 2016

description: kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften, Bd. 2, Nr. 1/2 (1974): kritische berichte, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Anomalous metamagnetic-like transition in a FeRh/Fe$_3$Pt interface occurring at T120 K in the field-cooled-cooling curves for low magnetic fields
Creators: name: Salem-Sugui, S.
name: Alvarenga, A. D.
name: Noce, R. D.
name: Guimaraes, R. B.
name: Mejia, C. Salazar
name: Salim, H.
name: Gandra, F. G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on the magnetic properties of a special configuration of a FeRh thin film. An anomalous behavior on the magnetisation vs. temperature was observed when low magnetic fields are applied in the plane of a thin layer of FeRh deposited on ordered Fe$_3$Pt. The anomalous effect resembles a metamagnetic transition and occur only in the field-cooled-cooling magnetisation curve at temperatures near 120 K in samples without any heat treatment.
description: 7 pages, 5 figures. arXiv admin note: text overlap with arXiv:1008.1956
Development of a Methodology for the Digital Representation of Manufacturing Technology Capabilities
Creators: name: Köhler, Tobias
name: Kleinhenz, Ludwig
name: Schäfer, Philipp Matthias
name: Bergmann, Jean Pierre
name: Peters, Diana
Publisher: name: Hannover : publish-Ing.
Year: 2021
Subjects: subject: Knowledge Representation
subject: Taxonomy
subject: Knowledge Graph
subject: Ontology
subject: Additive Manufacturing
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The demand for efficient and digital systems for supporting the decision making during the design of a product is a key issue in manufacturing companies. Decisions made during the development and design of a product have a strong impact on the costs and delivery times of a product. Hence, a digital system which supports the engineer during and after the development process with information about the manufacturability of the product can reduce the production costs and times. In order to be able to evaluate the manufacturing capabilities at manufacturing process and machine level, there is a need to represent them in a digital way. Digital knowledge bases like taxonomies and ontologies provide the possibility for a representation of manufacturing resources. The state of the art shows different approaches for the use of ontologies in the domain of subtractive manufacturing processes as well as additive manufacturing (AM) processes. The goal of this work is the semantical representation of manufacturing technology capabilities with focus on AMmachines and processes. In this paper we introduce taxonomies of Manufacturing Features and Manufacturing Restrictions which were developed in accordance with current standards. To enrich the taxonomies with information, it was enhanced by relations between different manufacturing related entities in a knowledge graph. If manufacturing processes and machines can be digitally mapped, described and linked to the geometric information of a product together with information on the current performance of the company/network, bottlenecks and delivery delays during the manufacturing of parts can be avoided.
title: Pflanzenbetonte Ernährungsformen als Unterrichtsthema
Creators: name: Leuthner, Theresa
Year: 2023

description: Die vorliegende Masterarbeit beschäftigt sich mit dem Thema ‚Pflanzenbetonte Ernährungsweisen‘ und dessen didaktischer sowie methodischer Aufbereitung für die Sekundarstufe 2. Obwohl dieses Unterrichtsthema im Curriculum der 6. Klasse AHS fest verankert ist, existiert nur eine geringe Anzahl an Lernarrangements, die für diese Schulstufe genutzt werden kann. Aus diesem Grund findet im Rahmen dieser Masterarbeit eine forschungsgeleitete Entwicklung von Unterrichtsmaterialien zum Thema ‚Pflanzenbetonte Ernährungsformen‘ nach dem Design-Based Research Ansatz statt, welche auf der Grundlage einer systematischen Literaturrecherche basieren und zudem kompetenzorientiert, didaktisch, sowie methodisch kriteriengeleitet konzipiert werden. Der fachwissenschaftliche Hintergrund verschiedener pflanzenbetonter Alternativen wird anhand aktueller Studien analysiert. Im weiteren Verlauf findet eine detaillierte Begründung des didaktischen und methodischen Vorgehens statt, auf welchem die Erstellung der Unterrichtsmaterialien basiert. Darauf folgt die forschungsgeleitete Beurteilung des Materials mithilfe von drei Expert*innen des pädagogischen Bereichs, welche das Fach Haushaltsökonomie und Ernährung seit geraumer Zeit unterrichten. Sie sind durch ihre langjährigen Erfahrungen im Schulalltag und ihre fachliche Kompetenz dafür geeignet, die Qualität des Unterrichtsmaterials zu beurteilen und Optimierungen vorzuschlagen. Die transkribierten Interviews werden codiert und hinsichtlich der Verbesserungsvorschläge der Expert*innen analysiert. Im weiteren Verlauf der Masterarbeit wird herausgearbeitet, welche Änderungen an den Materialien aufgrund der Expert*inneninterviews vorgenommen werden. Das optimierte Material kann im Anschluss für Lehrpersonen einer 6. Klasse AHS im Unterrichtsfach Haushaltsökonomie und Ernährung verwendet werden, um pflanzenbetonte Ernährungsformen anhand forschungsgeleitet entwickelter Materialien zu unterrichten.
Thermal spin fluctuations in spinor Bose-Einstein condensates
Creators: name: Melé-Messeguer, Marina
name: Juliá-Díaz, Bruno
name: Polls, Artur
name: Santos, Luis
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study the thermal activation of spin fluctuations in dynamically-stable spinor Bose-Einstein condensates. We analyze the specific cases of a non-dipolar spin-1 condensate in m = 0, where thermal activation results from spin-changing collisions, and of a Chromium condensate in the maximally stretched state m = -3, where thermal spin fluctuations are due to dipole-induced spin- relaxation. In both cases, we show that the low energy associated to the spinor physics may be employed for thermometry purposes down to extremely low temperatures, typically impossible to measure in BECs with usual thermometric techniques. Moreover, the peculiar dependence of the system's entropy with the applied Zeeman energy opens a possible route for adiabatic cooling.
description: 6 pages, 4 figures
Radical encounters: Black power, gay liberation, and the emergence of queer of color organizing
Creators: name: Lester, Andrew
Publisher: name: No Publisher Supplied
Year: 2022

description: “Radical Encounters” foregrounds the impact the Black Power movement had on the Third World liberation movement and queer activism, and especially on the emergence of queer of color activism and political thought. In doing so, it offers a genealogy of queer of color organizing and freedom dreams. I argue that the Black Power and gay liberation movements evolved through exchanges between their activists and that their links were more profound and enduring than the relatively brief alliance between the Black Panther Party and gay liberation might suggest. Because Black activists, and especially Black radicals and the Black Panther Party, profoundly shaped these links between different movements, they exerted an outsized influence on the emergence and development of queer of color organizing through the 1970s and beyond. This history reframes the way scholars understand activist alliances, political coalitions, and, more broadly, the relationships between social movements. “Radical Encounters” deliberately toggles between a regional and national scale to argue that the rise of queer of color movements in the US during the early 1970s had its roots in local encounters between activists in the second half of the 1960s. I combine archival research, close reading and literary analysis, and affect theory to examine a series of radical encounters that illuminate overlapping currents between these movements. In tracing this history, I argue that affective transmission facilitated movements' cross-fertilization, as it connected activists on the left across difference and guided them as they innovated new objects of struggle and outlined new political horizons.
A systematic review of participatory scenario planning to envision mountain social-ecological systems futures
Creators: name: Thorn, Jessic P. R.
name: Klein, Julia A.
name: Steger, Cara
name: Hopping, Kelly A.
name: Capitani, Claudia
name: Tucker, Catherine M.
name: Nolin, Anne W.
name: Reid, Robin S.
name: Seidl, Roman
name: Chitale, Vishwas .S.
name: Marchant, Robert
Publisher: name: Wolfville, Nova Scotia : Resilience Alliance
Year: 2020
Subjects: subject: Adaptive transformation
subject: Alpine
subject: Coupled natural-human systems
subject: Highlands
subject: Montane
subject: Planetary boundaries
subject: Stewardship
subject: Sustainability science
subject: Transdisciplinary
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft::333 | Boden- und Energiewirtschaft::333,7 | Natürliche Ressourcen, Energie und Umwelt
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: Mountain social-ecological systems (MtSES) provide crucial ecosystem services to over half of humanity. However, populations living in these highly varied regions are now confronted by global change. It is critical that they are able to anticipate change to strategically manage resources and avoid potential conflict. Yet, planning for sustainable, equitable transitions for the future is a daunting task, considering the range of uncertainties and the unique character of MtSES. Participatory scenario planning (PSP) can help MtSES communities by critically reflecting on a wider array of innovative pathways for adaptive transformation. Although the design of effective approaches has been widely discussed, how PSP has been employed in MtSES has yet to be examined. Here, we present the first systematic global review of single- and multiscalar, multisectoral PSP undertaken in MtSES, in which we characterize the process, identify strengths and gaps, and suggest effective ways to apply PSP in MtSES. We used a nine-step process to help guide the analysis of 42 studies from 1989 screened articles. Our results indicate a steady increase in relevant studies since 2006, with 43% published between 2015 and 2017. These studies encompass 39 countries, with over 50% in Europe. PSP in MtSES is used predominantly to build cooperation, social learning, collaboration, and decision support, yet meeting these objectives is hindered by insufficient engagement with intended end users. MtSES PSP has focused largely on envisioning themes of governance, economy, land use change, and biodiversity, but has overlooked themes such as gender equality, public health, and sanitation. There are many avenues to expand and improve PSP in MtSES: to other regions, sectors, across a greater diversity of stakeholders, and with a specific focus on MtSES paradoxes. Communicating uncertainty, monitoring and evaluating impacts, and engendering more comparative approaches can further increase the utility of PSP for addressing MtSES challenges, with lessons for other complex social-ecological systems. ¬© 2020 by the author(s).
Open Access Monographs for Teaching and Research: Equity and Diversity Beyond Book Processing Charges
Creators: name: Fathallah, Judith
Publisher: name: Zenodo
Year: 2022

description: As international funders make welcome moves towards OA publishing models, it is crucial to ensure the benefits and opportunies remain equitable, communal and accesible to the broad academic community. The Open Book Collective is currently registering as UK charity with the aim to address these issues and our online platform is scheduled to launch in summer 2022. This talk will describe our work and its importance in the current OA landscape.

 The OBC will host an infrastructure and revenue management platform for the support, access, distribution and promotion of OA academic books.
 We have developed the OBC and platform in consultation with librarians, publishers, and researchers, via a series of interactive workshops and reflective sessions.It will enable stakeholders explore, discover, access and support OA books from a range of leading publishers and infrastructure providers via high-quality integrated metadata and a fully searchable catalogue. In a bid to think beyond the Book Processing Charges that can sustain inequity in academic publishing, we offer a choice of flexible subscription packages, through which patrons can choose to support individual publishers and schemes, or indeed the entire collective. Whilst our major stakeholders are be librarians and publishers, the catalogue and metadata functions will be freely available to everyone. We also provide space for OA publishers to display their current and forthcoming books. Our mission is to build and maintain a sustainable infrastructure to support the publication, discovery and distribution of OA books via a range of flexible subscription packages, and make it easy for OA books to be delivered to libraries. The platform assists librarians in easily assessing OA content for local and global relevance, and comparing the offerings from different publishers in one place. The OBC is guaranteed to remain not-for-profit and anti-monopoly.

 By attending this session, attendees will be able to: Understand the position of the OBC and the broader need for OA book publishing to remain non-commercial Understand the problems with the potential monopolization and commercialisation of the OA landscape Compare more equitable options for both funding and purchasing OA books
Phase transitions in the adsorption system Li/Mo(112)
Creators: name: Fedorus, A.
name: Kolthoff, D.
name: Koval, V.
name: Lyuksyutov, I.
name: Naumovets, A.
name: Pfnür, Herbert
Publisher: name: College Park, MD : American Physical Society
Year: 2000
Subjects: subject: phase transition
subject: anisotropic interactions
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Experimental studies of the phase transitions in the adsorption system Li/Mo(112) are presented. This system is a model system for highly anisotropic interactions. From measurements of the half-widths of the low-energy electron diffraction spot profiles a phase diagram is derived for the whole submonolayer region of coverage in the temperature range 100–500 K. The commensurate low-coverage phases below θ=0.6 form chains normal to the troughs of the substrate. The commensurate p(4×1) phase, which is completed at a coverage, θ, of 0.25 monolayers (ML), seems to be truly long range ordered, whereas the p(2×1) phase at θ=0.5 still contains domain boundaries even at the lowest temperature of 100 K. Both undergo temperature-driven order-disorder phase transitions. In contrast, the incommensurate phases existing in the coverage range θ=0.66–0.90 form chains along the troughs, which are only weakly coupled normal to the troughs of the substrate. These phases exhibit two coverage-driven phase transitions from rectangular to oblique units cells and back at critical coverages of 0.66 and 0.85, respectively, and represent floating solids. As a function of temperature, they undergo a two-dimensional melting transition. Close to the critical coverages, the melting temperatures show a sharp drop below the temperature range accessible in our experiments. Both functional dependences of the angular deviation from 90° and of the melting temperature on coverage are in good agreement with a phenomenological theoretical model, assuming an instability of the shear modulus of the adsorbate unit cell at the critical coverages.
Generation of ultrasmall nanostructures in oxide layers assisted by self-organization
Creators: name: Block, T.
name: Pfnür, Herbert
Publisher: name: College Park, MD : American Institute of Physics
Year: 2008
Subjects: subject: Anisotropy
subject: Auger electron spectroscopy
subject: Electron beam lithography
subject: Electron microscopy
subject: Nanostructures
subject: Silica
subject: Auger excitation process
subject: Self-organization
subject: Ultrasmall nanostructures
subject: Ultrasmall structures
subject: Ultrathin films
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We explored the structural limits of unconventional electron-beam lithography by directly writing with an electron beam into ultrathin SiO2 films. The obtained structures were analyzed by tunneling microscopy. The Auger excitation process (Knotek-Feibelman mechanism) necessary for electron-stimulated oxygen desorption allows generation of ultrasmall structures. The subsequent processing step combines thermal desorption of the remaining monoxide and simultaneous etching promoted by thermally activated silicon atoms, which turns out to be a strongly anisotropic process close to step edges. Applying this combination of processes to a regularly stepped Si(557) sample, linewidths close to the resolution of the electron microscope of 5 nm were obtained. © 2008 American Institute of Physics.
title: Molecular studies on neuropeptide Y receptors involved in the regulation of feeding behaviour
Creators: name: Grant, Emma Jane
Publisher: name: University of Glasgow
Year: 1998
Subjects: subject: Neurosciences.

description: The regulation of energy and nutrient homeostasis is a complex procedure involving interactions between numerous neuropeptides, neurotransmitters and hormones implicated in the control of this fundamental behaviour. The PP-fold peptide family member Neuropeptide Y (NPY) is a well documented stimulator of food intake and is believed to play a role in the physiological regulation of ingestive behaviour. At the start of the work presented in this thesis the NPY receptor subtype responsible for mediating the characteristic augmentation in feeding was thought to be a novel, previously unidentified receptor subtype, as the pharmacology of the cloned NPY receptor subtypes failed to mimic the pharmacology known to stimulate NPY-elicited eating. The therapeutic implications for the development of an anti-obesity drug based on an antagonist to the "feeding" receptor for NPY made the cloning of this receptor subtype a rapidly evolving and highly competitive field. Initial efforts were therefore directed at cloning the feeding receptor for NPY using various novel receptor cloning strategies. The structural diversity exhibited by the members of the NPY receptor gene family made cloning using a homology screening strategy difficult, as demonstrated by the difficulties encountered in designing degenerate primers pairs for PCR or GenetrapperTM technology. As a result, functional expression cloning strategies were employed as an alternative strategy to clone novel NPY receptor gene family members, in particular the feeding receptor for NPY. Two different COS cell expression cloning strategies were used to identify NPY receptor gene family members following ligand binding and screening for cells expressing the desired cDNA by different detection methods. During the course of this work the structure of the NPY Y5 receptor was reported using an expression cloning strategy identical to one described in this thesis, and this initial report proposed that this receptor was the feeding receptor for NPY. However, subsequent reports describing a role for the NPY Y1 receptor in the regulation of NPY- induced feeding have generated considerable controversy regarding the identity of the NPY receptor subtype involved in feeding behaviour regulation. The cloning of the NPY Y5 receptor enabled further studies to be directed toward examining the regulation of the Y5 gene, with a view to elucidating further the role of both the Y1 and Y5 receptors in the control of feeding behaviour. Hybridisation screening of a rat genomic library permitted the identification of a partial rat Y5 genomic clone, and enabled further efforts to characterise the promoter region to be carried out. Additional studies were carried out to investigate the regulation of Y1 and Y5 receptors by examining changes in the levels of receptor mRNA expression.
Solar neutrino physics oscillations: Sensitivity to the electronic density in the Sun's core
Creators: name: Lopes, Ilídio
name: Turck-Chièze, Sylvaine
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Solar neutrinos coming from different nuclear reactions are now detected with a high statistics. Consequently, an accurate spectroscopic analysis of the neutrino fluxes arriving on the Earth's detectors become available, in the context of neutrino oscillations. In this work, we explore the possibility of using this information to infer the radial profile of the electronic density in the solar core. So, we discuss the constraints on the Sun's density and chemical composition that can be determined from solar neutrino observations. This approach constitutes an independent and alternative diagnostic to the helioseismic investigations already done. The direct inversion method, that we propose to get the radial solar electronic density profile, is almost independent of the solar model.
description: 9 pages, 5 figures, 1 table
Experimental investigation of two-dimensional plasmons in a DySi 2 monolayer on Si(111)
Creators: name: Rugeramigabo, Eddy P.
name: Nagao, T.
name: Pfnür, Herbert
Publisher: name: College Park, MD : American Physical Society
Year: 2008
Subjects: subject: electron energy loss spectroscopy
subject: monolayer
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: DySi2 monolayers were prepared by thermal evaporation of Dy at room temperature followed by annealing to 500°C on Si(111), which yields a perfect (1×1) low-energy electron diffraction pattern. These monolayers of DySi2 were investigated by electron energy loss spectroscopy with both high energy and momentum resolution. A low-energy acoustic-like dispersion was found with very small anisotropy in reciprocal space, consistent with the characteristic losses due to a two-dimensional plasmon in the hexagonal monolayer structure of DySi2, and effective hole densities of N2d =4.1× 1013 cm-2 with an effective mass of m* =0.37 me. Deviations of the expected dispersion due to single-particle excitations in the Si substrate were found above q∥ =0.08 Å-1. On (111) facets with terrace widths of 12 lattice constants, these properties change little along the terraces, but no plasmon wave propagation across step edges is possible, leading to strong suppression of characteristic loss signals in the direction normal to the steps. © 2008 The American Physical Society.
Ranunculus lingua L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: R. Lingua L. Cat. 8. Alle Fundorte heute anscheinend erloschen.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Synthese von Cancrinit im Butan-Diol/Wassersystem : Einfluss von Syntheseparametern und kristallstrukturelle Charakterisierung
Creators: name: Posnatzki, Britta
Publisher: name: Hannover : Universität
Year: 2001
Subjects: subject: Cancrinite
subject: organothermal synthesis
subject: template-free channel system
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: [no abstract]
title: Kindheit und Familie im Biedermeier. Carl Hartmanns »Großmutter mit betendem Kind« in der Ausstellung »Facetten bürgerlicher Kunst und Kultur. Vom Klassizismus zur Epoche der Weltausstellungen«. 14. Dezember 1995 bis 28. Juli 1996 im Germanischen Nationalmuseum
Creators: name: Peters, Ursula
Publisher: name: University Library Heidelberg
Year: 2016

description: [nicht vorhanden / not available]
Growth conditions, stoichiometry, and electronic structure of lattice-matched SrO BaO mixtures on Si(100)
Creators: name: Zachariae, J.
name: Pfnür, Herbert
Publisher: name: College Park, MD : American Physical Society
Year: 2005
Subjects: subject: low temperature growth conditions
subject: XPS analysis
subject: CMOS
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The low temperature growth conditions of mixed Ba0.7 Sr0.3 O layers on Si(100) were investigated using the combination of low energy electron diffraction, x-ray photoemission (XPS), and electron energy loss spectroscopy. With these methods crystallinity, stoichiometry, and electronic structure of both occupied and unoccupied levels were studied as a function of layer thickness. Oxide layers were generated by evaporating the metals in oxygen ambient pressure with the sample at room temperature after determination of the minimum oxygen pressure necessary for full oxidation. Good crystallinity with perfect lattice matching was only obtained starting with preadsorbed metallic layers at a concentration close to one monolayer (ML), with best results starting from the Sr (5×1). The XPS analysis shows that a sharp interface is formed during oxidation. The chemical species present at the interface are up to 1 ML of mono-oxidized Si and 1 ML of a mixed Sr-O-Si species. No silicide and silicate species or Si O2 formation at the interface after oxidation were found. Both interface and mixed oxide layers turned out to be stable to temperatures up to at least 600°C. Starting already at 1 ML of Ba0.7 Sr0.3 O, the band gap was found to be 4.3 eV, independent of layer thickness. We determined the valence band offset with respect to n-Si to be -2.2 eV, resulting in a conduction band offset of +1.0 eV. © 2005 The American Physical Society.
title: "Die "wirkliche Welt"?: ist, in Wahrheit, nur die Karikatur unsrer großn Romane!"
Creators: name: Siegl, David
Year: 2023

description: Die vorliegende Arbeit beschäftigt sich in erster Linie mit den frühen Texten Arno Schmidts und geht dabei der Frage nach, inwiefern sich die einzelgängerischen Beschreibungen und Positionierungen von Autor und dessen literarischen Ich-Erzählerfiguren zueinander in Relation setzen lassen. In diesem Zusammenhang wird neben einschlägiger Sekundärliteratur der Schmidt-Forschung vor allem auf Methoden der systemtheoretischen Literatursoziologie nach Niklas Luhmann zurückgegriffen sowie auf Konzepte der narratologischen Perspektivierung nach Genette. Absicht und Ziel der Arbeit ist es somit, den biografischen (Selbst-)Referenzierungen Schmidts wie auch jenen innerliterarischen Verweisen mit den Begriffen einer systemtheoretisch ausgerichteten Literaturwissenschaft beizukommen, um vor allen Dingen das diffizile Verhältnis von literaturinterner und -externer Realität bei Schmidt unter dem Konzept von System und Umwelt sowie weiteren zentralen Unterscheidungen näher zu beobachten. Die Auswahl der untersuchten Texte setzt sich aus dem Kurzroman Aus dem Leben eines Fauns sowie den beiden Erzählungen Leviathan und Schwarze Spiegel zusammen.
First-principles theory of surface thermodynamics and kinetics
Creators: name: Stampfl, C.
name: Kreuzer, H.J.
name: Payne, S.H.
name: Pfnür, Herbert
name: Scheffler, M.
Publisher: name: College Park, MD : American Physical Society
Year: 1999
Subjects: subject: gas-surface interface
subject: oxygen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Understanding the complex behavior of particles at surfaces requires detailed knowledge of both macroscopic and microscopic processes that take place; also certain phenomena depend critically on temperature and gas pressure. To link these processes we combine state-of-the-art microscopic, and macroscopic phenomenological, theories. We apply our theory to the O/Ru(0001) system and calculate thermal desorption spectra, heat of adsorption, and the surface phase diagram. The agreement with experiment provides validity for our approach which thus identifies the way for a predictive simulation of surface thermodynamics and kinetics. 1999 © The American Physical Society.
The Nature of Subproton Scale Turbulence in the Solar Wind
Creators: name: Chen, C. H. K.
name: Boldyrev, S.
name: Xia, Q.
name: Perez, J. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Space Physics (physics.space-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The nature of subproton scale fluctuations in the solar wind is an open question, partly because two similar types of electromagnetic turbulence can occur: kinetic Alfven turbulence and whistler turbulence. These two possibilities, however, have one key qualitative difference: whistler turbulence, unlike kinetic Alfven turbulence, has negligible power in density fluctuations. In this Letter, we present new observational data, as well as analytical and numerical results, to investigate this difference. The results show, for the first time, that the fluctuations well below the proton scale are predominantly kinetic Alfven turbulence, and, if present at all, the whistler fluctuations make up only a small fraction of the total energy.
Suitable data formats for seismological big data provisioning via web services
Creators: name: Quinteros, Javier
Publisher: name: Zenodo
Year: 2022
Subjects: EOSC
Open Science
Seismology

description: Seismological web services have been designed some years ago with particular types of user and data in mind, which are not exclusively what we see today. Disruptive techniques, generating data at much a finer resolution, compared to the standard seismic stations, are a challenge for data centres and users. Despite seismology is an advanced and well-organised discipline considering FAIR principles, these new datasets would make impossible to still use the same standard data formats and standard specifications for data provisioning services. Our main aim in this Task is to keep FAIRness in this community through evaluating new data formats suitable for this use case, testing and implementing tailor made services where possible within the currently defined standards. We develop a package tool named dastools as a set of tools to read, manipulate and convert seismic waveforms generated by DAS systems. Learn more
Electrical transport in ultrathin Cs layers on Si(001)
Creators: name: Zielasek, V.
name: Liu, H.
name: Shklyaev, A.A.
name: Rugeramigabo, Eddy P.
name: Pfnür, Herbert
Publisher: name: College Park, MD : American Physical Society
Year: 2005
Subjects: subject: ultrathin layers
subject: macroscopic measurement
subject: LEED
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Electrical transport in ultrathin Cs layers on Si(001) has been studied combining macroscopic conductivity measurements with low-energy electron diffraction, energy loss spectroscopy, and measurements of the work function. At temperatures around 150K, growth of the first three atomic layers proceeds layer-by-layer. The completion of each layer correlates with stepwise increases of the surface sheet conductance with coverage. Calibrating the Cs coverage by combined conductivity and work function measurements, the areal density of a single atomic layer is determined as 0.5 monolayers (3.39×1014cm-2). Electron spectroscopy reveals a semiconductor-metal transition of the surface upon completion of the first atomic layer, which correlates with the onset of a macroscopically measured sheet conductance in the 10-5Ω-1 range. While the conductance can be ascribed to electrical transport within surface states, its dependence on temperature indicates an activation barrier, which, most likely, is due to domain boundaries. At coverages of one monolayer and beyond, the Cs Si(001) surface exhibits a high metal-like conductance in the 10-3Ω-1 range. © 2005 The American Physical Society.
title: Das Subjekt ohne Gesellschaft
Creators: name: Nikolatti, Ronja
Year: 2023

description: Ratgeberliteratur kann als relevantes Analysematerial für die soziologische Forschung verstanden werden. So beinhaltet sie Subjektvorstellungen und -ideale, Weltanschauungen, Ideen oder Ideologien, sozio-kulturelle Regelwerke und gesellschaftliche Normen, die es allesamt erlauben, Rückschlüsse auf einen sozial geführten Diskurs zu ziehen. Im Rahmen meiner Masterarbeit wurden Ratgeberbücher zu Themen rund um Persönlichkeitsentwicklung diskursanalytisch entlang darin enthaltener Subjektideale und Techniken des Selbst (Foucault 1993) untersucht und in den Kontext des Diskurses zu neoliberaler Subjektivität eingebettet. Dabei wurde eine verbindende theoretische Perspektive eingenommen, die sich sowohl am dialektischen Verständnis von Subjekt und Gesellschaft nach Berger und Luckmann (2016) orientiert, als auch die Auseinandersetzungen zu Subjektivität, Macht und Wissen nach und im Anschluss an Foucault miteinbezieht. Die Analyse zeigt auf, dass in der Ratgeberliteratur ein sich selbstermächtigendes Subjekt als erwünscht vermittelt wird, was sich jedoch darauf reduziert, Macht über die eigenen Gedanken und Gefühle zu erlangen. Zudem kann ihr ein systemstabilisierender Einfluss zugeschrieben werden, wobei das Subjekt sich mit dem neoliberalen System und all seinen immanenten Ungleichheiten nicht lediglich arrangieren, sondern darüber hinaus damit glücklich sein soll.
description: Advice literature can be understood as relevant analytical material for sociological research. It contains subject ideals, world views, ideas or ideologies, socio-cultural rules and social norms, all of which make it possible to draw conclusions about a socially conducted discourse. In the context of a master's thesis, advice books on topics related to personality development were examined discourse-analytically along the lines of the subject ideals and techniques of the self (Foucault 1993) they contain and embedded in the context of the discourse on neoliberal subjectivity. In doing so, a combining theoretical perspective was adopted that is oriented towards the dialectical understanding of subject and society according to Berger and Luckmann (2016) as well as including the debates on subjectivity, power and knowledge after and following Foucault. The analysis shows that advice literature communicates a self-empowering ideal of the subject, which, however, is reduced to gaining power over one's own thoughts and feelings. Moreover, a system-stabilising influence can be attributed to it, whereby the subject is not only supposed to come to terms with the neoliberal system and all its immanent inequalities but is also supposed to be happy with it.
Effect of oxygen impurities on the critical properties of the (2×2)-2H/Ni(111) order-disorder phase transition
Creators: name: Budde, K.
name: Schwenger, L.
name: Voges, C.
name: Pfnür, Herbert
Publisher: name: College Park, MD : American Physical Society
Year: 1995
Subjects: subject: phase transition
subject: oxygen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Critical behavior of the two-dimensional order-disorder phase transition of the (2×2)-2H structure on Ni(111) was studied by high-resolution low-energy electron-diffraction experiments, both for the pure system and with atomic oxygen, at concentrations between 0.3% and 3% of a monolayer added as an impurity. By quantitative profile analysis of several superstructure spots as a function of temperature the critical exponents, and were determined over a range in the reduced temperature, t=(T-Tc)/Tc, between 0.001 and 0.1. At smaller values of t the system is finite-size limited. Crossover between four-state Potts behavior further away from Tc and exponents close to those of the two-dimensional Ising class were found. The crossover temperature depends systematically on the concentration of oxygen. We conclude that oxygen atoms seem to act like quenched impurities on this surface, similar to local defects already present at concentrations of 10-3 of a monolayer on the clean surface. © 1995 The American Physical Society.
On Multi-dimensional Compressible Flows of Nematic Liquid Crystals with Large Initial Energy in a Bounded Domain
Creators: name: Jiang, Fei
name: Jiang, Song
name: Wang, Dehua
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q35, 76D03

description: We study the global existence of weak solutions to a multi-dimensional simplified Ericksen-Leslie system for compressible flows of nematic liquid crystals with large initial energy in a bounded domain $Ω\subset \mathbb{R}^N$, where N=2 or 3. By exploiting a maximum principle, Nirenberg's interpolation inequality and a smallness condition imposed on the $N$-th component of initial direction field $\mf{d}_0$ to overcome the difficulties induced by the supercritical nonlinearity $|\nabla{\mathbf d}|^2{\mathbf d}$ in the equations of angular momentum, and then adapting a modified three-dimensional approximation scheme and the weak convergence arguments for the compressible Navier-Stokes equations, we establish the global existence of weak solutions to the initial-boundary problem with large initial energy and without any smallness condition on the initial density and velocity.
description: arXiv admin note: substantial text overlap with arXiv:1210.3565
Double-exchange theory of ferroelectric polarization in orthorhombic manganites with twofold periodic magnetic texture
Creators: name: Solovyev, I. V.
name: Nikolaev, S. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We argue that many aspects of improper ferroelectric activity in orthorhombic manganites can be rationalized by considering the limit of infinite intra-atomic splitting between the majority- and minority-spin states (or the double exchange limit), which reduces the problem to the analysis of a spinless double exchange (DE) Hamiltonian. We apply this strategy to the low-energy model, derived from the first-principles calculations, and combine it with the Berry-phase theory of electric polarization. We start with the simplest two-orbital model, describing the behavior of the eg bands, and apply it to the E-type antiferromagnetic (AFM) phase, which in the DE limit effectively breaks up into one-dimensional zigzag chains. We derive an analytical expression for the electronic polarization (Pel) and explain how it depends on the orbital ordering and the energy splitting Delta between eg states. Then, we evaluate parameters of this model, starting from a more general five-orbital model for all Mn 3d bands and constructing a new downfolded model for the eg bands. From the analysis of these parameters, we conclude that the behavior of Pel in realistic manganites corresponds to the limit of large Delta. We further utilize this property in order to derive an analytical expression for Pel in a general two-fold periodic magnetic texture, based on the five-orbital model and the perturbation-theory expansion for the Wannier functions in the first order of 1/Delta. This expression explains the functional dependence of Pel on the relative directions of spins. Furthermore, it suggests that Pel is related to the asymmetry of the transfer integrals, which should simultaneously have symmetric and antisymmetric components. Finally, we explain how the polarization can be switched between orthorhombic directions a and c by inverting the zigzag AFM texture in every second ab plane.
description: 41 page, 10 figures