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One-photon and multi-photon absorption, spontaneous and stimulated photon emission, resonance Raman scattering and electron transfer are important molecular processes that commonly involve combined vibrational-electronic (vibronic) transitions. The corresponding vibronic transition profiles in the energy domain are usually determined by Franck-Condon factors (FCFs), the squared norm of overlap integrals between vibrational wavefunctions of different electronic states. FC profiles are typically highly congested for large molecular systems and the spectra usually become not well-resolvable at elevated temperatures. The (theoretical) analyses of such spectra are even more difficult when vibrational mode mixing (Duschinsky) effects are significant, because contributions from different modes are in general not separable, even within the harmonic approximation. A few decades ago Doktorov, Malkin and Man'ko [1979 J. Mol. Spectrosc. 77, 178] developed a coherent state-based generating function approach and exploited the dynamical symmetry of vibrational Hamiltonians for the Duschinsky relation to describe FC transitions at zero Kelvin. Recently, the present authors extended the method to incorporate thermal, single vibronic level, non-Condon and multi-photon effects in energy, time and probability density domains for the efficient calculation and interpretation of vibronic spectra. Herein, recent developments and corresponding generating functions are presented for single vibronic levels related to fluorescence, resonance Raman scattering and anharmonic transition.
The influence of an ac current of arbitrary amplitude and frequency on the mixed-state dc-voltage-ac-drive tiltingratchet response of a superconducting film with uniaxial cosine pinning potential at finite temperature is theoretically investigated. The results are obtained in the single-vortex approximation, within the frame of an exact solution of the Langevin equation for non-interacting vortices. Both experimentally achievable, the dc ratchet response and absorbed ac power are predicted to demonstrate a pronounced filter-like behavior at microwave frequencies. Based on our findings, we propose a cut-off filter and discuss its operating curves as functions of the driving parameters, i.e, ac amplitude, frequency, and dc bias. The predicted results can be examined, e.g, on superconducting films with a washboard pinning potential landscape.
Health-care personnel (HCP) are exposed to infectious diseases throughout the course of their work. The concerns of pregnant HCP are considerable because certain otherwise mild infections may affect fetal development. We studied 424 pregnant HCP at the University Hospital Frankfurt / Germany between March 2007 and July 2011. Serological tests were carried out for varicella zoster virus (VZV), measles, mumps, rubella (MMR), cytomegalovirus (CMV) and parvovirus B19. Our overall seroprevalence data with regard to VZV, MMR, CMV and parvovirus B 19 corresponded to the general population. It was striking that, only 57.1% of the study population was immune against the four vaccine-preventable diseases (MMR, VZV). Our study suggests that a comprehensive approach to improving the vaccination status of said HCP before pregnancy is paramount.
Einer der zahlreichen Vorträge von Gertrude Lübbe-Wolff beginnt folgendermaßen: "Herr Gerhardt hat mich eingeladen, etwas über die aktuelle Bedeutung von Hegels Rechtsphilosophie zu sagen. Nichts lieber als das. An der Aktualität der Hegelschen Rechtsphilosophie leide ich geradezu, und über das, woran man leidet, spricht man ja gern. Die Aktualität der Hegelschen Rechtsphilosophie zeigt sich mir darin, dass ich öfter an Hegel denken muss, als mir lieb ist. Ich muss so oft an ihn denken, weil in unserer öffentlichen Kultur das Hegelwidrige so präsent ist." ...
Am 24. und 25. Oktober 2011 veranstalteten Sybille Steinbacher vom Institut für Zeitgeschichte der Universität Wien und Raphael Gross vom Fritz Bauer Institut, Geschichte und Wirkung des Holocaust Frankfurt/Main in Kooperation mit der Österreichischen HochschülerInnenschaft die Tagung "Der Holocaust und die Geschichte der Völkermorde im 20. Jahrhundert. Zur Bedeutung und Reichweite des Vergleichs". Im Mittelpunkt der Wiener Tagung standen Fragen nach der Entwicklung des Topos "Singularität des Holocaust", der Einordnung des nationalsozialistischen Judenmords in die Reihe der Völkermorde und dessen Vergleichbarkeit, beispielsweise mit den stalinistischen Verbrechen. Weiters wurde diskutiert, ob und wie den Zeitgenossen des "Dritten Reichs" die Gewaltexzesse gegen Zivilisten und ethnische Minderheiten zur Zeit des Ersten Weltkriegs bewusst waren. Ziel war es, die Bezüge der noch relativ jungen Komparativen Genozidforschung und der Holocaustforschung zu beleuchten, ferner den Merkmalen "ethnischer Säuberungen" nachzugehen und die Verbrechensgeschichte des letzten Jahrhunderts an ausgewählten Beispielen, wie dem Völkermord an den Armeniern, zu analysieren. ...
This paper describes the ongoing efforts of the authors to present ancient Greek and Roman numismatic data on the public internet, with an emphasis on efforts to integrate information from multiple sources using Linked Data and Semantic Web techniques. By way of very modern metaphor, it is useful to think of coins as intentionally created packages of 'named entities'. Each coin was struck by a particular authority, often at a known site, and coins often make reference to familiar concepts such as deities, historical events, or symbols that were widely recognized in the ancient world. The institutions represented among the authors have deployed search interfaces that allow users to take advantage of this aspect of numismatic databases. The American Numismatic Society's database provides faceted search to its collection of over 550,000 objects. The Portable Antiquities Scheme (PAS) in the UK presents individual finds (and hoards) recorded throughout the country. The Römisch-Germanische Kommission and the University of Frankfurt (DBIS) are developing a prototype metaportal (INTERFACE) that accesses national databases of coin finds held in in Frankfurt, Vienna and Utrecht. Each of these resources is beginning to explore Semantic Web/Linked data approaches so that the role of numismatic standards is immediately coming to the fore. DBIS and INTERFACE are developing a numismatic ontology. At the ANS and PAS, the public database already presents RDF serializations based on Dublin Core. Together, the authors have begun to explore standardization of conceptual names on the basis of the vocabulary presented at the site http://nomisma.org . Nomisma.org is a collaborative effort to provide stable digital representations of numismatic concepts and entities. It provides URIs for such basic concepts as 'coin', 'mint', 'axis'. All of these are defined within the scope of numismatics but are already being linked to other stable resources where available. This is particularly the case for mints. For example, the URI http://nomisma.org/id/corinth is intended to represent that ancient city in its role as a minter/issuer of coins. The URI is linked via the SKOS ontology to the Pleiades Gazetteer of ancient places. This allows Nomisma to be the basis for a common representation of the concept that an object is a coin minted at Corinth. The ANS has already deployed such relationships in its public database. The work of all these projects is very much in progress so that this paper hopes to generate discussion on how multiple large projects can move forward in their own work while encouraging sufficient commonality to support large scale research questions undertaken by diverse audiences.
Vom 14. - 23. Oktober 2012 fand in der Hessischen Heimvolkshochschule BURG FÜRSTENECK die zweite Hessische Schülerakademie für die Mittelstufe (Jgs. 7 - 9) statt. 60 leistungsbereite, (hoch-)begabte Schülerinnen und Schüler nahmen während der Herbstferien an Haupt- und Wahlkursen aus Themenbereichen der Naturwissenschaften, Medienwissenschaft sowie Kunst und Kultur teil.
Die vorliegende Dokumentation der Hessischen Schülerakademie Oberstufe 2012 hat die bewährte Gliederung: Die Berichte über die Kurse entstehen aus Referaten der SchülerInnen, die von Studierenden betreut wurden. In aufsteigender Verantwortung werden sie von den Studierenden, der jeweiligen Kursleitung und der Akademieleitung gegengelesen, so dass ein möglichst fehlerfreies Ergebnis entsteht, welches überdies zur Lektüre einladen möchte. Wir hoffen, dass das auch diesmal gelungen ist.