3,319 research outputs found

    Vibrational spectra of Cd2As2O7

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    The infrared and Raman spectra of Cd2As2O7, belonging to the thortveitite structural type, were recorded and are discussed on the basis of a factor group analysis and by comparisons with related compounds.Fil: Baran, Enrique José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; ArgentinaFil: Weil, Matthias. Technische Universitat Wien; Austri

    Matthias Wagner : author profile

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    The author presented on this page has published his 10. article in Angewandte Chemie in the last 10 years

    Vibrational spectra of Hg3TeO6 and Hg2TeO5

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    The infrared and Raman spectra of the crystalline hexaoxotellurates Hg3TeO6 and Hg2TeO5 were recorded and discussed on the basis of a site symmetry analysis derived from known structural data. Approximate values for the Tesingle bondO bond force constants are reported and some comparisons with related species are made.Fil: Baran, Enrique José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; ArgentinaFil: Weil, Matthias. Technische Universitat Wien; Austri

    Using invariom modelling to distinguish correct and incorrect central atoms in `duplicate structures' with neighbouring 3<i>d</i>elements

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    Modelling coordination compounds has been shown to be feasible using the invariom method; for the best fit to a given set of diffraction data, additional steps other than using lookup tables of scattering factors need to be carried out. Here such procedures are applied to a number of `duplicate structures', where structures of two or more supposedly different coordination complexes with identical ligand environments, but with different 3dmetal ions, were published. However, only one metal atom can be plausibly correct in these structures, and other spectroscopic data are unavailable. Using aspherical scattering factors, a structure can be identified as correct from the deposited Bragg intensities alone and modelling only the ligand environment often suffices to make this distinction. This is not possible in classical refinements using the independent atom model. Quantum-chemical computations of the better model obtained after aspherical-atom refinement further confirm the assignment of the element in the respective figures of merit.</jats:p

    Enduring Ambiguity: What Is European Literature? Matthias Nawrat in Conversation with Monika Woltig

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    Matthias Nawrat is a Polish-German author living in Germany born in Opole, Poland. He moved with his family to Bamberg in 1989. He was awarded the Adelbert-von-ChamissoFörderpreis, was nominated for the Deutscher Buchpreis, received the Bremen Literature Prize and the Alfred Döblin Medaille. His most important novels were "Wir zwei allein" (2012), "Die vielen Tode unseres Opas Jurek" (2015), and "Der traurige Gast" (2019).Matthias Nawrat to niemiecki autor polskiego pochodzenia. Matthias Nawrat urodził się w Opolu i wraz z rodziną przeprowadził się w 1989 roku do Bambergu. Uzyskał Nagrodę im. Adelberta von Chamisso (Förderpreis), był nominowany do Niemieckiej Nagrody Książkowej (Deutscher Buchpreis), otrzymał Nagrodę Literacką miasta Bremy i Medal im. Alfreda Döblina. Najważniejsze teksty: "Wir zwei allein" (2012), "Die vielen Tode unseres Opas Jurek" (2015), "Der traurige Gast" (2019).Matthias Nawrat ist ein deutscher Autor polnischer Herkunft. Matthias Nawrat wurde im polnischen Opole geboren und siedelte 1989 mit seiner Familie nach Bamberg über. Er wurde mit dem Adelbert-von-Chamisso-Förderpreis ausgezeichnet, zum Deutschen Buchpreis nominiert und erhielt den Bremer Literaturpreis sowie die Alfred-Döblin-Medaille. Die wichtigsten Texte: "Wir zwei allein" (2012), "Die vielen Tode unseres Opas Jurek"  (2015), "Der traurige Gast" (2019)

    Mordell–Weil lattices

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    This book lays out the theory of Mordell–Weil lattices, a very powerful and influential tool at the crossroads of algebraic geometry and number theory, which offers many fruitful connections to other areas of mathematics. The book presents all the ingredients entering into the theory of Mordell–Weil lattices in detail, notably, relevant portions of lattice theory, elliptic curves, and algebraic surfaces. After defining Mordell–Weil lattices, the authors provide several applications in depth. They start with the classification of rational elliptic surfaces. Then a useful connection with Galois representations is discussed. By developing the notion of excellent families, the authors are able to design many Galois representations with given Galois groups such as the Weyl groups of E6, E7 and E8. They also explain a connection to the classical topic of the 27 lines on a cubic surface. Two chapters deal with elliptic K3 surfaces, a pulsating area of recent research activity which highlights many central properties of Mordell–Weil lattices. Finally, the book turns to the rank problem—one of the key motivations for the introduction of Mordell–Weil lattices. The authors present the state of the art of the rank problem for elliptic curves both over Q and over C(t) and work out applications to the sphere packing problem. Throughout, the book includes many instructive examples illustrating the theory

    John Matthias

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    Poster promoting author John Matthias reading from his work in the Auditorium, Building 9, University of North Florida. Poster dimensions: 26.7 cm x 41.8 cmhttps://digitalcommons.unf.edu/performances_print/1013/thumbnail.jp

    Matthias Vonken: Handlung und Kompetenz. Theoretische Perspektiven für die Erwachsenen und Berufspädagogik. Wiesbaden: VS-Verlag 2005 (207 S.) [Rezension]

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    Rezension von: Matthias Vonken: Handlung und Kompetenz. Theoretische Perspektiven für die Erwachsenen und Berufspädagogik. Wiesbaden: VS-Verlag 2005 (207 S.; ISBN 3-531-14573-8; 24,90 EUR)
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