666 research outputs found
Proximity effects in nanostructures with geometric curvature for superconducting spintronics
No full textThis thesis explores new avenues for the field of superconducting spintronics, with a focus on hybrid structures of superconductors and geometrically curved magnetic materials. In these structures the proximity effect induces superconducting correlations in the magnetic material and we study how these correlations are influenced by geometric curvature and magnetic properties. We perform theoretical and numerical investigations to show that geometric curvature induces many interesting effects in superconducting-magnetic heterostructures, and we discuss how these effects could be exploited in new device designs for superconducting spintronics applications. Among these effects, we show that geometric curvature induces long-range supercurrents and a tunable 0-π transition in superconductor-curved ferromagnet-superconductor junctions, which means the curvature can control the direction of charge current flow. Moreover, we demonstrate how geometric curvature produces a superconducting spin-valve effect in hybrid structures of superconductors and curved ferromagnets, where the critical temperature of the system can be controlled by varying the curvature. In the context of the interplay between superconductivity and magnetism, we present a mechanism producing superconductivity in high magnetic field in multiband superconductors. Finally, we introduce a diffusive theory allowing to include geometric curvature in superconducting-antiferromagnetic heterostructures, and give a numerical analysis of observables of diffusive superconductivity in antiferromagnetic helix hybrid nanowires
The good, the bad and the funny
No full text[No abstract available]BERGSON H, 1956, RIRE; Buckley Frank H., 2003, MORALITY LAUGHTER; GAUT, ETHICS AESTHETICS HU, P58; Gaut B, 1998, PHILOS LITERATURE, V22, P51; GAUT B, 2000, ROUTLEDGE COMPANION, P341; ISENBERG A, 1955, J AESTHETICS ART CRI, V13, P395, DOI 10.2307-426439; Jacobsen D., 1997, PHILOS TOPICS, V25, P155; Morreal J., 1987, PHILOS LAUGHTER HUMO; ROUSSEAU JJ, 1960, POLITICS ARTS, P36; WALTON K, 1993, MIMESIS MAKE BELIEVE, P243; 2001, TIMES 1017; 2001, TIMES 1019; 2001, TIMES 101831
Schleswig-Holstein meerumschlungen and the call for nationalism: national identity under construction on the German and Danish border in selected works by Theodor Storm, Theodor Fontane, and Herman Bang
No full textMy dissertation examines selected German and Danish literary texts of the late
nineteenth century that employ ideological notions of nationalism for the purpose of
constructing and stabilizing national identity. The groundwork for the research centers on
specific times in nationalist movements in Europe and a specific setting on the border
region of Schleswig-Holstein. The urgency of this project lies especially in the effort to
understand the shifting qualities and perceptions of nationalism as both a destructive and
productive force in current discourses of globalization. In my analysis of four literary narratives, Theodor Storm’s novellas Ein grünes Blatt (1850) and Abseits (1863), Theodor Fontane’s Unwiederbringlich (1891), and Herman Bang’s Tine (1889), I demonstrate how national identity is constructed on the basis of a firm nationalism and constantly destabilized when confronted with the presence of an Other by the border. In the chosen literary works, national identity, at all stages of its formation and in all classifications and depictions as German, Prussian, Danish, or Frisian, is fundamentally about attaining the subject’s recognition as sovereign and universal. And because the subject functions as a representation of the nation with which it identifies, the construction of the subject’s national identity is ultimately about achieving international recognition. In the selected narratives, national identity—whether German or Danish—is constructed by the authors in a very similar fashion. While nationalism is criticized and condemned to different degrees, it also serves as the necessary ground for shaping effectively one’s national identity. The three authors under discussion operate with a nationalist project in which they set out to construct a national self: in the texts under consideration, nationalism functions as a temporary but necessary formative stage in the construction of the subject’s national identity. The selected authors also experience and triumph over nationalism in their personal lives. Ultimately, this dissertation will point to the crucial significance of the regional particularity—given by the margins of a border area—for the representation of the national totality.Ph. D.Includes bibliographical referencesIncludes vitaby Juljana Gjata Hjorth Jacobse
Author response
No full textMethylation of cytosines (5 me C) is a widespread heritable DNA modification. During mammalian development, two global demethylation events are followed by waves of de novo DNA methylation. In vivo mechanisms of DNA methylation establishment are largely uncharacterized. Here, we use Saccharomyces cerevisiae as a system lacking DNA methylation to define the chromatin features influencing the activity of the murine DNMT3B. Our data demonstrate that DNMT3B and H3K4 methylation are mutually exclusive and that DNMT3B is co-localized with H3K36 methylated regions. In support of this observation, DNA methylation analysis in yeast strains without Set1 and Set2 shows an increase of relative 5 me C levels at the transcription start site and a decrease in the gene-body, respectively. We extend our observation to the murine male germline, where H3K4me3 is strongly anti-correlated while H3K36me3 correlates with accelerated DNA methylation. These results show the importance of H3K36 methylation for gene-body DNA methylation in vivo
Cellular responses of Candida albicans to phagocytosis and the extracellular activities of neutrophils are critical to counteract carbohydrate starvation, oxidative and nitrosative stress
No full textAcknowledgments We thank Alexander Johnson (yhb1D/D), Karl Kuchler (sodD/D mutants), Janet Quinn (hog1D/D, hog1/cap1D/D, trx1D/D) and Peter Staib (ssu1D/D) for providing mutant strains. We acknowledge helpful discussions with our colleagues from the Microbial Pathogenicity Mechanisms Department, Fungal Septomics and the Microbial Biochemistry and Physiology Research Group at the Hans Kno¨ll Institute (HKI), specially Ilse D. Jacobsen, Duncan Wilson, Sascha Brunke, Lydia Kasper, Franziska Gerwien, Sea´na Duggan, Katrin Haupt, Kerstin Hu¨nniger, and Matthias Brock, as well as from our partners in the FINSysB Network. Author Contributions Conceived and designed the experiments: PM HW IMB AJPB OK BH. Performed the experiments: PM CD HW. Analyzed the data: PM HW IMB AJPB OK BH. Wrote the paper: PM HW OK AJPB BH.Peer reviewe
The Individual-oriented Paradigm of Postmodern Pedagogical Education: Danish Context
No full textThe article deals with the analysis of the main characteristic features of individual-oriented humanistic teacher education in the Danish environment. The author starts with the historical background, pointing out the founders of humanistic Danish pedagogy. Further on, the article investigates postmodern concepts of authentic teacher professional training formulated by Charles Taylor and developed by Danish philosophers P.F. Laursen and B. Jacobsen. The author argues that K. A. Larsen's DLH theory considers pedagogic education as an active process of decision-making, thus combining individual-oriented theories with postmodernity
"Towards a new method of constitutional bargaining? The role and impact of EU institutions in the IGC and convention method of treaty reform"
No full textThis paper looks at the impact of the change from negotiating EU treaty reform within intergovernmental conferences to the new convention method. As most existing studies of treaty reform explain actor influence based exclusively upon relative actor power and preferences prior to negotiation, in effect 'black boxing' the actual negotiation process, a bargaining model is created that theorizes on the impact of the change in negotiating context and conduct of negotiations for the ability of actor to translate bargaining resources into influence. The paper then describes three 'ideal types' of negotiating treaty reform, and the proceeds to investigate the opportunities for influence for EU institutions that each type of negotiating method opens. The paper finds that while the Council Secretariat has traditionally had many possibilities to gain influence in treaty reform negotiations, the new convention method had opened up many opportunities for both the Commission, and especially the European Parliament (EP), to gain influence. Yet to have influence these possibilities must be translated into real influence through the successful use of appropriate strategies in the negotiations. In the present European Convention, while the Commission has had too ambitious and often conflicting positions, central members of the EP delegation have had up to now relative success in building coalitions around their positions, although it is still too early to conclude on whether the MEP's will prove successful in translating their bargaining resources into influence over the final Constitutional Treaty. The conclusions point to the necessity for students of treaty reform of opening up the 'black box' of the actual treaty reform process to investigate how the context and conduct of negotiations matter – enabling us to better explain which actors won in a treaty reform negotiation and why
Giant triplet proximity effect in π-biased Josephson junctions with spin-orbit coupling
No full textIn diffusive Josephson junctions the phase difference φ between the superconductors strongly influences the spectroscopic features of the layer separating them. The observation of a uniform minigap and its phase modulation were only recently experimentally reported, demonstrating agreement with theoretical predictions up to now—a vanishing minigap at φ = π. Remarkably, we find that in the presence of intrinsic spin-orbit coupling a giant proximity effect due to spin-triplet Cooper pairs can develop at φ = π, in complete contrast to the suppressed proximity effect without spin-orbit coupling. We here report a combined numerical and analytical study of this effect, proving its presence solely based on symmetry arguments, which makes it independent of the specific parameters used in experiments. We show that the spectroscopic signature of the triplets is present throughout the entire ferromagnetic layer. Our finding offers a way to artificially create, control, and isolate spin-triplet superconductivity.submittedVersionThis is a submitted manuscript of an article published by American Physical Society in Physical review B: Condensed matter and materials physics, 1 July 201
Obliteração pulpar em incisivo decíduo traumatizado
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde. Programa de Pós-Graduação em Odontologia.Este estudo descritivo retrospectivo em incisivos centrais superiores decíduos traumatizados teve por objetivo, verificar a ocorrência de obliteração pulpar, o tempo decorrido entre o trauma e o desenvolvimento desta seqüela, a presença de alteração de cor da coroa bem como a freqüência de necrose pulpar secundária nos dentes obliterados, além de avaliar a existência de associação entre a obliteração e o sexo, a idade do paciente no momento do trauma dental, o tipo e a reincidência de trauma. Para isto, realizou-se uma pesquisa desenvolvida a partir dos dados clínicos e radiográficos dos prontuários de pacientes participantes do Programa de Atendimento ao Paciente Traumatizado da Universidade Federal de Santa Catarina, entre agosto de 1998 e agosto de 2007. Seguindo os critérios de elegibilidade, foram incluídos 112 dentes de 82 crianças. Destes, 60 (53,6%) apresentavam obliteração pulpar, sendo que em 58,3% dos casos esta foi diagnosticada em até 12 meses após o trauma. A associação entre alteração de cor da coroa e obliteração pulpar foi confirmada (p<0,001), e não houve casos de necrose pulpar secundária. Não se observou associação estatística entre as variáveis sexo e idade dos pacientes, bem como tipo e recorrência de trauma em relação a obliteração pulpar. Os resultados deste estudo permitem concluir que a ocorrência de obliteração pulpar em dentes decíduos traumatizados é alta e a proservação clínica e radiográfica periódica é a melhor conduta para esta seqüela
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