cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Probing microscopic origins of confined subdiffusion by first-passage observables
Creators: name: Condamin, S.
name: Tejedor, V.
name: Voituriez, R.
name: Benichou, O.
name: Klafter, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Subdiffusive motion of tracer particles in complex crowded environments, such as biological cells, has been shown to be widepsread. This deviation from brownian motion is usually characterized by a sublinear time dependence of the mean square displacement (MSD). However, subdiffusive behavior can stem from different microscopic scenarios, which can not be identified solely by the MSD data. In this paper we present a theoretical framework which permits to calculate analytically first-passage observables (mean first-passage times, splitting probabilities and occupation times distributions) in disordered media in any dimensions. This analysis is applied to two representative microscopic models of subdiffusion: continuous-time random walks with heavy tailed waiting times, and diffusion on fractals. Our results show that first-passage observables provide tools to unambiguously discriminate between the two possible microscopic scenarios of subdiffusion. Moreover we suggest experiments based on first-passage observables which could help in determining the origin of subdiffusion in complex media such as living cells, and discuss the implications of anomalous transport to reaction kinetics in cells.
description: 21 pages, 3 figures. Submitted version
Generalised Geometries and Lie Algebroid Gauging
Creators: name: Wright, Kyle
Publisher: name: The Australian National University
Year: 2018
Subjects: String theory
symmetry
T-duality
generalised geometry
generalized geometry
algebroids

description: This thesis investigates the role of algebroid geometries in string theory. Differential geometry provides the framework for general relativity and point particle dynamics. The dynamics of strings and higher dimensional branes are most naturally described by algebroid geometry on vector bundles---with fluxes being incorporated as geometric data describing twisted vector bundles. This thesis contains original results in two areas: Firstly, twisted generalised contact structures and generalised coKahler structures are studied. Secondly, a non-isometric gauging proposal based on Lie algebroids is studied from a geometric perspective. We study generalised contact structures from the point of view of reduced generalised complex structures; naturally incorporating non-coorientable structures as non-trivial fibering. The infinitesimal symmetries are described in detail with a geometric description given in terms of gerbes. As an application of the reduction procedure we define generalised coKahler structures in a way which extends the Kahler/coKahler correspondence. An invariant geometric approach to the Lie algebroid gauging proposal of Kotov and Strobl [114,99,89,90] is presented. The existing literature on Lie algebroid gauging is purely local. We consider global aspects through the integrability of a local algebroid action. The main result is that it is always possible to provide a local non-isometric gauging for any arbitrary background. The necessary and sufficient conditions to gauge with respect to a given choice of vector fields are given. However, requiring a gauge invariant field strength term restricts to Lie groupoids that are locally isomorphic to Lie groups. As an application of this work the proposal of Chatzistavrakidis, Deser, and Jonke for "T-duality without isometry" is studied. We show that this non-isometric T-duality proposal is in fact equivalent to non-abelian T-duality by an appropriate field redefinition.
Schriften zur Kultur- und Mediensemiotik | Online
Creators: name: Nies, Martin
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2018

description: Die Schriften zur Kultur- und Mediensemiotik | Online sind ein Open Access Journal des Virtuellen Zentrums für kultursemiotische Forschung / Virtual Centre for Cultural Semiotics (www.kultursemiotik.com) und werden von Martin Nies herausgegeben. Sonderband: Semiotik und Arbeitswelt. Zeichentheoretisch basierte Praktiken in Medienproduktion, Kulturvermittlung, Produktvermarktung und Unternehmensführung Die Beiträge dieses Bandes widmen sich Zeichen, die uns in Arbeitswelten und damit in konkreten wirtschaftlichen Zusammenhängen begegnen.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 3 (2017)
Visual formalisms in comparative-historical linguistics
Creators: name: Kaplan, Judith
Publisher: name: Zenodo
Year: 2019

description: This paper examines visual formalisms in comparative-historical linguistics from the perspective of the history of science. It shows that visual aids representing key understandings of language relationship have followed on pre-existing visual metaphors. Using this observation to pry open canonical metaphors of language relationship, it traces the ways in which these ``visualizations'' have both consolidated existing research programs and opened up new lines of inquiry for students and recent advocates of phylogenetic methods.
Filmischer Raum als Ort der Kontemplation
Creators: name: Ostwald, Christian
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2018

description: Christian Ostwald widmet sich in seinem Beitrag ganz und gar Andrej Tarkovskijs STALKER (SU 1979). Er geht der Frage nach, worin sich Tarkovskijs Filmklassiker als Kunstwerk und Medium philosophischen Diskurses begründet. So wird im Einzelnen dargelegt, wie der Diskurs bereits in der archetypischen Figuration und den raumsemantischen Strukturen des Films angelegt ist. Der Beitrag zeigt wie die Permeabilität der diegetischen Grenze erhöht und durch die spezifische Montage Tarkovskijs filmische Räume der Kontemplation eröffnet werden. Dabei widersetzen sich diese kontemplativen Räume - ganz zugunsten einer vornehmlich ästhetischen Erfahrung - einer rein rationalen Rezeption.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 5 (2018)
New Generation of Massless Dirac Fermions in Graphene under External Periodic Potentials
Creators: name: Park, Cheol-Hwan
name: Yang, Li
name: Son, Young-Woo
name: Cohen, Marvin L.
name: Louie, Steven G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that new massless Dirac fermions are generated when a slowly varying periodic potential is applied to graphene. These quasiparticles, generated near the supercell Brillouin zone boundaries with anisotropic group velocity, are different from the original massless Dirac fermions. The quasiparticle wavevector (measured from the new Dirac point), the generalized pseudospin vector, and the group velocity are not collinear. We further show that with an appropriate periodic potential of triangular symmetry, there exists an energy window over which the only available states are these quasiparticles, thus, providing a good system to probe experimentally the new massless Dirac fermions. The required parameters of external potentials are within the realm of laboratory conditions.
description: 4 pages, 4 figures
A Broad-Spectrum Diffractive Network via Ensemble Learning
Creators: name: Shi, Jiashuo
name: Chen, Yingshi
name: Zhang, Xinyu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Emerging Technologies (cs.ET)
subject: Optics (physics.optics)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We proposed a broad-spectrum diffractive deep neural network (BS-D2NN) framework, which incorporates multi-wavelength channels of input lightfields and performs a parallel phase-only modulation utilizing a layered passive mask architecture. A complementary multi-channel base learner cluster is formed in a homogeneous ensemble framework based on the diffractive dispersion during lightwave modulation. In addition, both the optical Sum operation and the Hybrid (optical-electronic) Maxout operation are performed for motivating the BS-D2NN to learn and construct a mapping between input lightfields and truth labels under heterochromatic ambient lighting. The BS-D2NN can be trained using deep learning algorithms so as to perform a kind of wavelength-insensitive high-accuracy object classification.
description: 4 pages, 3 figures
CHARACTERISTICS OF USE OF ANTHROPONYM IN PHRASEOLOGICAL UNITS (IN FRENCH MATERIAL)
Creators: name: Sindarov, F.X.
Publisher: name: Zenodo
Year: 2023

description: This article presents comments on the origin, meanings and application of anthroponyms used in French phraseological units. The use of anthroponyms in such phraseological units, which appeared under the influence of historical, literary, and religious factors, helps to reveal their unique national character, the values of that nation, as well as their historical foundations.
Katastrophen-Diegese und Katastrophen-Exegese (KDE)
Creators: name: Bauer, Matthias
name: Brümmer, Tanja
name: Nies, Martin
name: Stolz, Christian
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2016

description: Projekt des Virtuellen Zentrums für kultursemiotische Forschung zum Verhältnis von Erklärung und Erzählung sowie von natur- und kulturwissenschaftlicher Erkenntnis.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 2 (2016)
selbstreferentielle Stadt
Creators: name: Schilling, Samuel
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2018

description: Der Beitrag von Samuel Schilling zeichnet aus systemtheoretischer Sicht auf Kommunikation die Überlegungen des Stadtsoziologen Hans-Paul Bahrdt nach. Ihm zufolge stellen besondere Formen des Kommunizierens und Verhaltens ein Merkmal städtischer Äffentlichkeit dar. Die Beschreibung macht Ungenauigkeiten des Kommunikationsbegriffs Bahrdts sichtbar, stellt aber genauso den gleichzeitigen inhaltlichen Wert seiner Überlegungen heraus. Zudem werden Bahrdts Überlegungen zur öffentlichen Sphäre in der Stadt und zur Besonderheit der dortigen Kommunikation um die phänomenologische Beschreibung von Orten des Ethnologen Marc Augé ergänzt. Dergestalt ist es möglich, die Besonderheiten der Orte städtischer Öffentlichkeit genauer zu charakterisieren.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 5 (2018)
Generation of intense dissipation in high Reynolds number turbulence
Creators: name: Buaria, Dhawal
name: Pumir, Alain
name: Bodenschatz, Eberhard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Intense fluctuations of energy dissipation rate in turbulent flows result from the self-amplification of strain rate via a quadratic nonlinearity, with contributions from vorticity (via the vortex stretching mechanism) and the pressure Hessian tensor, which we analyze here using direct numerical simulations of isotropic turbulence in periodic domains of up to $12288^3$ grid points, and Taylor-scale Reynolds numbers in the range $140-1300$. We extract the statistics of various terms involved in amplification of strain and additionally condition them on the magnitude of strain. We find that strain is overall self-amplified by the quadratic nonlinearity, and depleted via vortex stretching; whereas pressure Hessian acts to redistribute strain fluctuations towards the mean-field and thus depleting intense strain. Analyzing the intense fluctuations of strain in terms of its eigenvalues reveals that the net amplification is solely produced by the third eigenvalue, resulting in strong compressive action. In contrast, the self-amplification terms acts to deplete the other two eigenvalues, whereas vortex stretching acts to amplify them, both effects canceling each other almost perfectly. The effect of the pressure Hessian for each eigenvalue is qualitatively similar to that of vortex stretching, but significantly weaker in magnitude. Our results conform with the familiar notion that intense strain is organized in sheet-like structures, which are in the vicinity of, but never overlap with regions of intense vorticity due to fundamental differences in their amplifying mechanisms.
description: 13 pages, 7 figures
Methods for detecting flaring structures in Sagittarius A* with high frequency VLBI
Creators: name: Doeleman, Sheperd S.
name: Fish, Vincent L.
name: Broderick, Avery E.
name: Loeb, Abraham
name: Rogers, Alan E. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The super massive black hole candidate, Sagittarius A*, exhibits variability from radio to X-ray wavelengths on time scales that correspond to < 10 Schwarzschild radii. We survey the potential of millimeter-wavelength VLBI to detect and constrain time variable structures that could give rise to such variations, focusing on a model in which an orbiting hot spot is embedded in an accretion disk. Non-imaging algorithms are developed that use interferometric closure quantities to test for periodicity, and applied to an ensemble of hot-spot models that sample a range of parameter space. We find that structural periodicity in a wide range of cases can be detected on most potential VLBI arrays using modern VLBI instrumentation. Future enhancements of mm/sub-mm VLBI arrays including phased array processors to aggregate VLBI station collecting area, increased bandwidth recording, and addition of new VLBI sites all significantly aid periodicity detection. The methods described herein can be applied to other models of Sagittarius A*, including jet outflows and Magneto-Hydrodynamic accretion simulations.
description: Submitted to ApJ
Multiple Mass Hierarchies from Complex Fixed Point Collisions
Creators: name: Faedo, Anton F.
name: Hoyos, Carlos
name: Mateos, David
name: Subils, Javier G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A pair of complex-conjugate fixed points that lie close to the real axis generates a large mass hierarchy in the real renormalization group flow that passes in between them. We show that pairs of complex fixed points that are close to the real axis and to one another generate multiple hierarchies, some of which can be parametrically enhanced. We illustrate this effect at weak coupling with field-theory examples, and at strong coupling using holography. We also construct complex flows between complex fixed points, including flows that violate the $c$-theorem.
description: 24 pages + appendices, 12 figures
Arbeit auf dem Höllengrund
Creators: name: Hayer, Björn
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2016

description: Lars von Triers filmisches Werk erzählt immer wieder von der menschlichen Aneignung der Natur. Wo sich Bilder der Ursprünglichkeit hervortun, sind sie zugleich Teil einer künstlichen und künstlerischen Kulisse. Sei es in DOGVILLE (2003),wo die Gebirgslandschaft um das gleichnamige Dorf lediglich über ein theatralisches Setting imaginierbar wird, oder in MELANCHOLIA (2011), worin die schwermütige Somnambulin Justine (Kirsten Dunst) nachts im Licht des Mondes auf einer Wiese liegt und für den Zuschauer die Untergangsmusik Richard Wagners erklingt - Flora und Fauna bilden eine überzeichnete, zu kultivierende, bisweilen eine zu entstellende Materialität. Insbesondere der erste Teil seiner "Trilogie der Depression", ANTICHRIST (2009), verhandelt facettenreich den Konflikt zwischen dem Menschen und seiner natürlichen Umwelt, der sich in einem bis zuletzt an Drastik zunehmenden Antagonismus zwischen Mann und Frau spiegelt. Die Protagonisten, anonymisiert als "Sie" (Charlotte Gainsbourg) und "Er"(Willem Dafoe), tragen dort einen allegorischen Kampf der Geschlechter aus, der sich nicht zuletzt auf der Ebene der "Arbeit" manifestiert. Denn deren berufliche Professionen und Perspektiven repräsentieren auf unterschiedliche Art und Weise gegensätzliche Interpretationszugänge zur Schöpfung. Die Auseinandersetzung um Macht wird im Rahmen des Paradigmas "Arbeit" auch zu einem Ringen um die Deutungshoheit über Ursprung und Gestalt der Natur selbst. Im Folgenden soll zunächst die eigenartige, von christlichen Urmythen gezeichnete Entwicklung und Morbidisierung jener Natur-Sphäre im ANTICHRIST in den Blick genommen werden, woran sich die Betrachtung des kontrastiven Umgangs beider Protagonisten mit der Natur, ausgehend von ihren Arbeitsfeldern, anschließt.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 2 (2016)
Sinnvoll oder sinnfrei?
Creators: name: Wegener, Thomas
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2018

description: Ausgehend von den gattungsspezifischen Besonderheiten des Historienfilms zeigt Thomas Wegener anhand zahlreicher Beispiele, dass der historische Spielfilm höchst eklektizistische Geschichtsbilder (nach)zeichnet. Diese Geschichtsbilder basieren einerseits überwiegend auf Vorstellungen des 19. Jahrhunderts, andererseits auf einer aus dem Faschismus bekannten Bildsprache. Keiner der Filme berücksichtigt den aktuellen historischen Forschungsstand. Vielmehr kommentieren die dargestellten, vergangenen, Welten aktuelle Ereignisse und Konflikte und spiegeln rezente Werte und Normen wider. Daher scheint es, so Thomas Wegener, für die historiographische Forschung sinnvoller zu sein, weniger nach dem "richtig" oder "falsch" zu fragen, sondern angesichts der enormen Breitenwirkung des Medium Films zu erörtern, wie genau Geschichte im Spielfilm gedacht und inszeniert wird.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 5 (2018)
Open string engineering of D-brane geometry
Creators: name: Park, I. Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: One-loop scattering on a stack of D3 branes was considered in arXiv:0801.0218 [hep-th]. Divergence was found and its cancelation mechanism was proposed, wherein it was conjectured that the D-brane geometry be introduced in the form of counter vertex operators. Here we verify the conjecture at the first few leading orders in an expansion method that we call large-$r_0$ expansion. We comment on the relation with the Fischler-Susskind mechanism and discuss the implications of our result for AdS/CFT.
description: 26 pages, latex, refs added, minor typos corrected, a paragraph added in the conclusion on the relation with the Fischler-Susskind mechanism, a version that will appear in JHEP
Mirror diffusion of cosmic rays in highly compressible turbulence near supernova remnants
Creators: name: Xu, Siyao
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent gamma-ray observations reveal inhomogeneous diffusion of cosmic rays (CRs) in the interstellar medium (ISM). This is expected as the diffusion of CRs depends on the properties of turbulence, which can vary widely in the multi-phase ISM. We focus on the mirror diffusion arising in highly compressible turbulence in molecular clouds (MCs) around supernova remnants (SNRs), where the magnetic mirroring effect results in significant suppression of diffusion of CRs near CR sources. Significant energy loss via proton-proton interactions due to slow diffusion flattens the low-energy CR spectrum, while the high-energy CR spectrum is steepened due to the strong dependence of mirror diffusion on CR energy. The resulting broken power law spectrum of CRs matches well the gamma-ray spectrum observed from SNR/MC systems, e.g., IC443 and W44.
description: 11 pages, 3 figures, accepted for publication in ApJ
Highly efficient conversion of laser energy to hard X-rays in high intensity laser-solid simulations
Creators: name: Morris, Stuart
name: Robinson, Alex
name: Ridgers, Christopher
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We present simulations which predict significantly higher laser to X-ray efficiencies than those previously found in high intensity (1e20-1e22 W/cm2) laser-solid simulations. The bremsstrahlung emission is shown to last for 10-100 ps, which is difficult to model with conventional particle-in-cell (PIC) codes. The importance of collective effects is also demonstrated, showing the limitations of Monte Carlo modelling in these systems. A new, open-source hybrid-PIC code with bremsstrahlung routines has been developed to model this X-ray production in 3D. Special boundary conditions are used to emulate complex electron refluxing behaviour, which has been characterised in 2D full-PIC simulations. The peak X-ray efficiency was recorded in thick gold targets, with 7.4% conversion of laser energy into X-rays of energy 1 MeV or higher. The target size is shown to play a role in the conversion efficiency and angular distribution of emitted X-rays, and a simple analytic model is presented for estimating these efficiencies.
description: 11 pages, 11 figures, 1 table
"Poetologie des Prosaischen" - E.T.A. Hoffmanns Der Sandmann aus der Perspektive einer (kultur-)semiotisch orientierten Literaturwissenschaft
Creators: name: Großmann, Stephanie
name: Krah, Hans
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2016

description: Die vorliegende Analyse steht im Zusammenhang mit unserem Beitrag "Strukturalismus/Literatursemiotik. Zeichenordnungen und zeichenhafte Täuschungen in Der Sandmann" in dem von Oliver Jahraus herausgegebenen Band Zugänge zur Literaturtheorie. 17 Modellanalysen zu E.T.A. Hoffmanns "Der Sandmann" (Reclam 2016). Dort legen wir in einem ausführlichen Theorieteil die Grundlagen der Literatursemiotik bzw. des Strukturalismus dar und wenden diese auf E.T.A Hoffmanns Der Sandmann (1816) an. Die dort aus Gründen des Umfangs nur pointiert und skizzenhaft vorgestellten Ergebnisse sollen hier ausgeführt und fortgeführt werden, wobei es uns ein Anliegen ist, nicht nur Thesen zu formulieren, sondern auch den argumentativen Weg dahin nachvollziehbar(er) zu machen. Dazu dient als erster Schritt eine Datenaufbereitung hinsichtlich grundlegender textueller Kategorien, der darlegen soll, wie wir von den Textbefunden zu unseren Ergebnissen kommen.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 2 (2016)
Solar Grand Minima and random fluctuations in dynamo parameters
Creators: name: Moss, D.
name: Sokoloff, D.
name: Usoskin, I.
name: Tutubalin, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider to what extent the long-term dynamics of cyclic solar activity in the form of Grand Minima can be associated with random fluctuations of the parameters governing the solar dynamo. We consider fluctuations of the alpha-coefficient in the conventional Parker migratory dynamo, and also in slightly more sophisticated dynamo models, and demonstrate that they can mimic the gross features of the phenomenon of the occurrence of Grand Minima over a suitable parameter range. The temporal distribution of these Grand Minima appears chaotic, with a more or less exponential waiting time distribution, typical of Poisson processes. In contrast however, the available reconstruction of Grand Minima statistics based on cosmogenic isotope data demonstrates substantial deviations from this exponential law. We were unable to reproduce the non-Poissonic tail of the waiting time distribution either in the framework of a simple alpha-quenched Parker model, or in its straightforward generalization, nor in simple models with feedback on the differential rotation. We suggest that the disagreement may only be apparent and is plausibly related to the limited observational data, and that the observations and results of numerical modeling can be consistent and represent physically similar dynamo regimes.
description: Solar Physics, in print
First Nations Youth Reframing the Focus: Cultural Knowledge as a Site for Health Education
Creators: name: Riecken, Ted
name: Tanaka, Michele T.
name: Scott, Tish
Publisher: name: Canadian Journal of Native Education
Year: 2021

description: Through a participatory project, health researchers and educators move toward an in-depth, multifaceted understanding o f the urgent and pressing health issues of contemporary Aboriginal youth. Digital video is used by high school students as a researcher vehicle to highlight health topics that emerge from their own personal perspectives. Participants reject the Eurocentric deficit model of health and create a paradigm based in the holistic values of balance and respect as taught by their community and Elders. Through personal explorations, insightful connections are made between health indicators such as drug abuse or suicide and less tangible determinants such as emotional and spiritual well-being. After engaging in the videomaking process, participants felt empowered as emerging researchers and inspired to become messengers of health knowledge for their peers.
description: Canadian Journal of Native Education, Vol. 39 No. 1 (2017)
Materiality and Meaning in Literary Studies
Creators: name: Rockenberger, Annika
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2016

description: Recently, non- and paraverbal properties of literary texts at the level of documentary inscription (i.e. materiality), seen individually or as aspects of a so-called "material text", that is, the union of materiality and verbal sign systems, received an increasing amount of attention in textual scholarship and literary studies. Here, "meaning" or at least "semantic potentiality" has been attributed to both or either and physical features of texts have been construed as hitherto neglected aspects of literary communication and literary aesthetics. In what follows, I will present a brief conspectus of the current debate and then try to provide a reconstruction of underlying ideas by answering the question "now does a material text mean?". Taking a descriptive meta-perspective and focusing on conceptual and methodological clarification, I try to clarify the somewhat blurry expressions "meaning", "to mean" and the like by translating them into the distinct terminology of semiotics and transferring them into the theoretical framework of an instrumentalist notion of signs.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 2 (2016)
Soziale Unterschiede in der Spital­versorgung chronisch kranker Menschen in der Schweiz
Creators: name: Bayer-Oglesby, Lucy
name: Bachmann, Nicole
name: Zumbrunn, Andrea
name: Solèr, Maria
Publisher: name: EMH Schweizerischer Ärzteverlag
Year: 2023

description: Die NFP-74-Studie “Social Inequalities and Hospitalisations in Switzerland (SIHOS)” untersuchte zum ersten Mal in der Schweiz soziale Ungleichheiten bei Spitalaufenthalten auf der Basis von repräsentativen landesweiten Daten auf Individualebene.
Schriften zur Kultur- und Mediensemiotik | Online
Creators: name: Klimczak, Peter
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2018

description: Schriften zur Kultur- und Mediensemiotik | Online ist ein Open Access Journal des Virtuellen Zentrums für kultursemiotische Forschung / Virtual Centre for Cultural Semiotics (www.kultursemiotik.com). Die Ausgabe 5 wurde von Peter Klimczak herausgegeben.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 5 (2018)
Szenopragmatik
Creators: name: Bauer, Matthias
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2016

description: Wie hängen Zeichen, Szenen und Medien in der Lebenswelt des Menschen zusammen? Eine Antwort auf diese Frage erfordert konzeptionelle Überlegungen, die sich synoptisch zu einer Reihe relevanter Theorien verhalten müssen. Wie die einschlägigen Begriffe, aufeinander bezogen werden könnten, soll hier - eher vorläufig als abschließend - erkundet werden.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 2 (2016)
Theorie trifft Praxis
Creators: name: Wagner, Marietheres
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2018

description: Ein Merkmal der kollektiven Verbreitung von Narrativen ist der hohe Grad an Emotionalität, mit der sie einhergehen. Massenmedien und deren narrative Strukturen spiegeln kulturelle Wertvorstellungen und Normen, die wie Glaubenssysteme fortwährend reproduziert werden. Narrative spiegeln sich in Religionen, Wirtschaftssystemen, politischen Strukturen und kulturellen Identitäten. Der israelische Historiker Yuval Noah Harari bezeichnet Geschichten als Grundpfeiler menschlicher Gesellschaften. Nach Harari haben im Laufe der Geschichte Erzählungen über Götter, Nationen und Unternehmen so große Macht gewonnen, dass die Fiktion die objektive Wirklichkeit beherrscht, d.h. dass die Narrative einer Kultur oder Epoche deren Realität formen oder sogar erst hervorbringen. Jedes narrative Denken aber ist im Kern von Dramaturgie bestimmt. Dabei steht im Fokus einer dramaturgischen Struktur insbesondere die Frage, wie Ziele erreicht, Konflikte oder Probleme gelöst und Hindernisse überwunden werden können. Erzählverläufe führen exemplarische Wege zur Lösung vor, die z.B. in Genres oder standardisierten Erzählmodellen immer wieder reproduziert werden. Dieser Beitrag geht von der Hypothese aus: Je weniger Austausch zwischen Theorie und Praxis stattfindet, desto destruktiver kann Dramaturgie wirken, während Verzahnungen zwischen Theorie und Praxis für beide Seiten wünschenswert und bereichernd sind. Auf der Seite der Theorie führt die Transparenz zu mehr Medienkompetenz, auf der Seite der Praxis ist Theorie die Basis für Reflexion und Orientierung. Semiotik ist eine Wissenschaft, die es ermöglicht, Tiefenstrukturen von Texten begrifflich zu definieren und damit Dramaturgie und deren Wirkung wahrnehmbar zu machen. Semiotische Ansätze sind gleichermaßen für Theorie und Praxis relevant und vermögen dadurch beide Bereiche zu verbinden. Besonders deutlich wird dies am Beispiel des Zeichensystems Filmdramaturgie.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 3 (2017)
Schriften zur Kultur- und Mediensemiotik | Online
Creators: name: Nies, Martin
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2016

description: Schriften zur Kultur- und Mediensemiotik | Online ist ein Open Access Journal des Virtuellen Zentrums für kultursemiotische Forschung / Virtual Centre for Cultural Semiotics (www.kultursemiotik.com) und wird herausgegeben von Martin Nies.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 2 (2016)
Superfluid and Fermi liquid phases of Bose-Fermi mixtures in optical lattices
Creators: name: Mitra, Kaushik
name: Williams, C. J.
name: de Melo, C. A. R. Sá
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We describe interacting mixtures of ultracold bosonic and fermionic atoms in harmonically confined optical lattices. For a suitable choice of parameters we study the emergence of superfluid and Fermi liquid (non-insulating) regions out of Bose-Mott and Fermi-band insulators, due to finite Boson and Fermion hopping. We obtain the shell structure for the system and show that angular momentum can be transferred to the non-insulating regions from Laguerre-Gaussian beams, which combined with Bragg spectroscopy can reveal all superfluid and Fermi liquid shells.
description: 4 pages, 2 figures
The temperatures of red supergiants in low metallicity environments
Creators: name: González-Torà, Gemma
name: Davies, Ben
name: Kudritzki, Rolf-Peter
name: Plez, Bertrand
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The temperatures of red supergiants (RSGs) are expected to depend on metallicity (Z) in such a way that lower-Z RSGs are warmer. In this work, we investigate the Z-dependence of the Hayashi limit by analysing RSGs in the low-Z galaxy Wolf-Lundmark-Mellote (WLM), and compare with the RSGs in the higher-Z environments of the Small Magellanic Cloud (SMC) and Large Magellanic Cloud (LMC). We determine the effective temperature ($T_{\textrm{eff}}$) of each star by fitting their spectral energy distributions, as observed by VLT+SHOOTER, with MARCS model atmospheres. We find average temperatures of $T_{\textrm{eff}_{\textrm{WLM}}}=4400\pm202$ K, $T_{\textrm{eff}_{\textrm{SMC}}}=4130\pm103$ K, and $T_{\textrm{eff}_{\textrm{LMC}}}=4140\pm148$ K. From population synthesis analysis, we find that although the Geneva evolutionary models reproduce this trend qualitatively, the RSGs in these models are systematically too cool. We speculate that our results can be explained by the inapplicability of the standard solar mixing length to RSGs.
description: Accepted for publication in MNRAS
Real-time Detection and Adaptive Mitigation of Power-based Side-Channel Leakage in SoC
Creators: name: Kiaei, Pantea
name: Yao, Yuan
name: Schaumont, Patrick
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: Power-based side-channel is a serious security threat to the System on Chip (SoC). The secret information is leaked from the power profile of the system while a cryptographic algorithm is running. The mitigation requires efforts from both the software level and hardware level. Currently, there is no comprehensive solution that can guarantee the whole complex system is free of leakage and can generically protect all cryptographic algorithms. In this paper, we propose a real-time leakage detection and mitigation system which enables the system to monitor the side-channel leakage effects of the hardware. Our proposed system has extensions that provide a real-time monitor of power consumption, detection of side-channel leakage, and real-time adaptive mitigation of detected side-channel leakage. Our proposed system is generic and can protect any algorithm running on it.
Testing the Waters: Engaging the Tekeni Teyoharke Kahswenhtake/Two Row Wampum into a Research Paradigm
Creators: name: Freeman, Bonnie
name: Van Katwyk, Trish
Publisher: name: Canadian Journal of Native Education
Year: 2021

description: This paper is based on the lessons learned through a research project exploring the con­cepts of the Tekeni Teyoha:ke Kahswenhtake and "putting these ideas into action ."
description: Canadian Journal of Native Education, Vol. 41 No. 1 (2019)
The regulation and role of corticosteroids during fetal development
Creators: name: Tye, Lesley Margaret
Publisher: name: University of British Columbia
Year: 2010

description: Fetal mouse txssues were incubated with ¹⁴C-corticosterone together with ³H-11-dehydrocorticosterone and the steroids were extracted and separated chromatographically to determine the ratio reduction/dehydrogenation. Between gestational days 14 and 19, the ratio in placenta increased from 6.3 to 23.4; in brain from 0.06 to 0.63; in gut from 0.1 to 0.5; and in liver from 0.29 to 8.3. In lung, the ratio rose from 0.16 to 6.7 only after day 16, two days later. Treatment of mothers 16 h earlier with 200 μg dexamethasone increased the ratio in lung and placenta on day 16 but not earlier. After injection of ³H-corticosterone into mothers, the amount of ³H-11-dehydrocorticosterone, which was 98% of the total on day 14, declined, while unchanged corticosterone increased at least tenfold in all tissues examined between days 14 and 19. A receptor has been found in fetal brain with K[sub D]= 8.3 nM which binds ³H-dexamethasone to the extent of 0.14 pmoles/mg protein on day 14. The number of receptor sites did not increase with gestational age, indicating that these are not critical in initiating steroid-dependent processes. In fetal brain and placenta, receptors bound both ³H-corticosterone and 11-dehydro-corticosterone. In cytosol and nucleus, both labelled steroids were displaced competitively by each other. The ³H-ll-dehydro-corticosterone-receptor complex not only entered the nucleus but was bound to chromatin slightly more than was the hormone corticosterone. Of parameters reflecting changing levels of active hormone in fetal tissues, the in vitro incorporation of ¹⁴C-leucine, ³H-uridine and ³H-thymidine into acid-insoluble components of tissues were the most sensitive. The incorporation of these precursors decreased between days 14 and 19 by as much as 90%. The deposition of glycogen varied in different fetal tissues but did not reflect hormonal changes. By all parameters, the injection of mothers with 200 μg dexamethasone 16 h earlier resulted in acceleration of the normal pattern, producing values on day 14 which were normally observed on days 15-19. Fetuses which had been treated with dexamethasone in utero were born and appeared normal. Other steroid-induced processes included increased amino acid content of fetal brain and the conversion of glucose to fructose in fetal liver and gut. It is concluded that the regulation of corticosteroids is accomplished not simply by activation of the fetal pituitary-adrenal axis, but by the interconversion in individual tissues of corticosterone and its 11-dehydro metabolite. The 11-dehydrocorticosterone is not only an abundant metabolite, but serves as a reservoir of potential hormone and can compete with corticosterone for both cytosol and nuclear receptor sites. Since it binds to chromatin, it is possible that 11-dehydrocorticosterone exerts actions at the transcriptional level. Corticosteroids exert their effects on fetal development at an earlier stage than has been hitherto reported.
Zeichen, Konventionen & Geschichten
Creators: name: Herz, Matthias
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2018

description: In den letzten Jahrzehnten hat sich im Bereich der Entwicklung digitaler Produkte ein wesentlicher Perspektivenwechsel vollzogen. Unter dem Banner des human centered design wird nicht mehr nur die Frage gestellt, wie ein hochfunktionales Produkt aussehen muss. Es wird zudem gefragt, wie dieses hochfunktionale Produkt auch ein möglichst benutzerfreundliches werden kann. In diesem Zusammenhang haben Methoden und Perspektiven in die Produkt- und Bedienkonzeptentwicklung Einzug gefunden, die Zeichen, Genese und Nutzung von Konventionen sowie narratologische Ansätze in den Fokus rücken. Dieser Beitrag wird exemplarisch einige dieser Ansätze skizzieren, sie in ihre konkreten Anwendungsbereiche einbetten und Rückbezüge zur Mediensemiotik herstellen. Ein entscheidender Punkt ist hierbei, dass sich die vorgestellten Herangehensweisen zunächst nicht auf eine akribische Verwendung von Zeichenbegriffen fokussieren. Ihr effektiver Einsatz gründet ganz im Gegenteil auf einer zentralen Stärke der Mediensemiotik, nämlich der analytisch-pragmatischen Herangehensweise an Texte (im weitesten Sinne) und der damit verknüpften Analyse der Bedeutung von Zeichen innerhalb eines semiotischen Raums bzw. der Semiosphäre. In diesem Sinne wird zunächst ein Abgleich mediensemiotischer Theorie mit der praktischen Anwendung von Zeichenbegriffen und weiteren Grundlagen erfolgen. Im Anschluss daran werden einige zentrale Werkzeuge dieser Disziplinen aufgezeigt und ihre konkrete Verwendung skizziert. Die Bedienkonzeptentwicklung im allgemeinen und Usability Engineering im speziellen sind in diesem Zusammenhang Anwendungsbereiche, die - ohne es explizit benennen - mit semiotischen und narratologisch geprägten Werkzeugen arbeiten, deren Grundlagen sich zum Teil in der Mediensemiotik wiederfinden. Exemplarisch dafür werden nachfolgend die Metapher des Mensch-Maschine-Dialogs sowie die Konzepte der Persona und der User Story behandelt. Abschließend wird diskutiert, inwiefern sich die Mediensemiotik in diesem Arbeitsbereich produktiven Synergien aus Forschung und Praxis zuwenden kann.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 3 (2017)
Krise... continued: Populärkulturelle Funktionen seriellen Krisenerzählens am Beispiel Breaking Bad
Creators: name: Hennig, Martin
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2015

description: Die zentrale Fragestellung der folgenden Ausführungen wird dementsprechend lauten, durch welche scheinbar extrem populären Merkmale sich BREAKING BAD aufbauend oder abweichend von Gattungskonventionen auszeichnet und inwiefern diese mit dem kulturellen Krisendiskurs des Produktionszeitraumes korrelieren. Dabei wird die Serie als spezifische Form der Krisenartikulation und -bearbeitung analysiert. Dazu werden anfangs einige theoretische Erwägungen zum seriellen Erzählen vorausgeschickt. Im Rahmen der darauf folgenden Handlungsanalyse wird insbesondere auf das vorgeführte Familienmodell, die kausale Weltordnung der Diegese, Identitätskonflikte des Protagonisten, Bürgerlichkeit als Krisenraum sowie das hier propagierte Gegenmodell poetischer Gerechtigkeit einzugehen sein. Abschließend sollen die daraus resultierenden Befunde einer zusammenfassenden Analyse des Krisendiskurses in BREAKING BAD dienen.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 1 (2015)
Compressed Sensing of Analog Signals in Shift-Invariant Spaces
Creators: name: Eldar, Yonina C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A traditional assumption underlying most data converters is that the signal should be sampled at a rate exceeding twice the highest frequency. This statement is based on a worst-case scenario in which the signal occupies the entire available bandwidth. In practice, many signals are sparse so that only part of the bandwidth is used. In this paper, we develop methods for low-rate sampling of continuous-time sparse signals in shift-invariant (SI) spaces, generated by m kernels with period T. We model sparsity by treating the case in which only k out of the m generators are active, however, we do not know which k are chosen. We show how to sample such signals at a rate much lower than m/T, which is the minimal sampling rate without exploiting sparsity. Our approach combines ideas from analog sampling in a subspace with a recently developed block diagram that converts an infinite set of sparse equations to a finite counterpart. Using these two components we formulate our problem within the framework of finite compressed sensing (CS) and then rely on algorithms developed in that context. The distinguishing feature of our results is that in contrast to standard CS, which treats finite-length vectors, we consider sampling of analog signals for which no underlying finite-dimensional model exists. The proposed framework allows to extend much of the recent literature on CS to the analog domain.
description: to appear in IEEE Trans. on Signal Processing
Culture-Clash-Komödien der Gegenwart: Konzeptionen von Transkulturalität, Intrakulturalität und Gender in Türkisch für Anfänger, Fack ju Göhte und Zwei Familien auf der Palme
Creators: name: Nies, Martin
Publisher: name: Schriften zur Kultur- und Mediensemiotik | Online
Year: 2015

description: Die erfolgreichsten deutschsprachigen Kino-Produktionen der Jahre 2012 und 2013 erzählen humoristisch von der interkulturellen Annäherung und Verpartnerung zwischen "Deutschen" und "Migranten mit deutschem Pass" -, so jedenfalls lautet die Bezeichnung in einem intradiegetischen fiktiven Beitrag des ARDONachtmagazins in TÜRKISCH FÜR ANFÄNGER. Diese der Tagesschau-Redaktion unterstellte und von der offiziellen Sprachregelung "Menschen mit Migrationshintergrund" signifikant abweichende Wortwahl dient einer filmischen Kritik an der öffentlichen Rede über die bezeichneten Personen(-gruppen) in Deutschland, weil sie den Aspekt der (Neu-)Zuwanderung und systemischen Fremdheit bei Menschen ohne eigene Migrationserfahrung, die bereits in zweiter Generation deutsche Staatsangehörige sind, markiert. En passant und bar jeden Witzes attestiert der Film damit öffentlichen Instanzen - als eine solche wird die Tagesschau im Medienbereich wahrgenommen -, dass sie Personen die Anerkennung einer sozialen und kulturellen Zugehörigkeit verweigern, die faktisch deutsche Mitbürger sind und das Recht haben, als solche betrachtet zu werden: "Wo kommst'n her?" fragt der Deutschtürke Cem den Deutschgriechen Costa; "Steglitz", ist die selbstverständliche Antwort, während der Nachrichtenbeitrag im Film zwar eine juristisch-formale (deutscher Pass), nicht aber kulturelle deutsche Identität eben dieser beiden Figuren behauptet. Zentraler Gegenstand der filmischen Verhandlung in TÜRKISCH FÜR ANFÄNGER ist damit das Verhältnis von Deutschen und Postmigranten - so der auch von der Bundeszentrale für politische Bildung aktuell bevorzugte Begriff, der nach Naika Foroutan einer "nationalen und kulturellen Mehrfachzugehörigkeit und -identifikation von Individuen" Rechnung trägt.
description: Schriften zur Kultur- und Mediensemiotik | Online, Nr. 1 (2015)
Replacing the Notion of Spacetime Distance by the Notion of Correlation
Creators: name: Kempf, Achim
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Spacetime is conventionally viewed as a stage on which actors, in the form of fields, move. Here, we explore what may lie beyond this picture. The starting point is the observation that quantum fluctuations of fields are the more strongly correlated the shorter their spacetime distance. As a consequence, the notion of spacetime distance, including the metric as its infinitesimal version, can be replaced by the notion of correlation strength. This suggests a new picture in which abstract (2-point and multi-point) correlators are the primary structure. In general, these abstract correlators can only be described as information theoretic structures and, in principle, they need not bear any relationship to quantum fields or spacetimes. These correlators may allow approximations, however, so that, in certain regimes, they can be mathematically approximately represented as the 2-point and multi-point functions of quantum fields living on a spacetime. In this way, the standard picture of a curved spacetime with fields whose correlators arise from Feynman rules would merely be a convenient approximate picture, while the underlying picture is that of a spacetime-less and field-less information-theoretic structure of abstract correlations.
description: 8 pages
Doping a Mott insulator with orbital degrees of freedom
Creators: name: Sirker, J.
name: Damerau, J.
name: Klümper, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the effects of hole doping on one-dimensional Mott insulators with orbital degrees of freedom. We describe the system in terms of a generalized t-J model. At a specific point in parameter space the model becomes integrable in analogy to the one-band supersymmetric t-J model. We use the Bethe ansatz to derive a set of nonlinear integral equations which allow us to study the thermodynamics exactly. Moving away from this special point in parameter space we use the density-matrix renormalization group applied to transfer matrices to study the evolution of various phases of the undoped system with doping and temperature. Finally, we study a one-dimensional version of a realistic model for cubic titanates which includes the anisotropy of the orbital sector due to Hund's coupling. We find a transition from a phase with antiferromagnetically correlated spins to a phase where the spins are fully ferromagnetically polarized, a strong tendency towards phase separation at large Hund's coupling, as well as the possibility of an instability towards triplet superconductivity.