1,962 research outputs found
Robert Neumann: Mit eigener Feder
No full textRobert Neumann (1897–1957, Austrian exiled author and Vicepresidet of the PEN International, was even a disputatious antifascist political writer. His essays, his letters and biograpical documents give a vivid portrait of the diversity of literary life in Germay and Austria (before 1933/after 1958) and of exile in England (1933–1958).Der österreichische Schriftsteller Robert Neumann (1897–1975), Exilant und Vizepräsident des PEN International, war auch ein streitbarer antifaschistischer Publizist. Seine politisch-literarischen Aufsätze, seine Briefe und biographischen Dokumente ergeben ein lebendiges und facettenreiches Bild des literarischen Lebens in Deutschland und Österreich (vor 1933/nach 1958) und des Exils in England (1933–1958)
Relative Haagerup property for arbitrary von Neumann algebras
No full textWe introduce the relative Haagerup approximation property for a unital, expected inclusion of arbitrary von Neumann algebras and show that if the smaller algebra is finite then the notion only depends on the inclusion itself, and not on the choice of the conditional expectation. Several variations of the definition are shown to be equivalent in this case, and in particular the approximating maps can be chosen to be unital and preserving the reference state. The concept is then applied to amalgamated free products of von Neumann algebras and used to deduce that the standard Haagerup property for a von Neumann algebra is stable under taking free products with amalgamation over finite-dimensional subalgebras. The general results are illustrated by examples coming from q-deformed Hecke-von Neumann algebras and von Neumann algebras of quantum orthogonal groups.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Analysi
Herausforderungen für die Lehrkräftebildung am Beispiel der Qualifizierung für Berufsbildende Schulen im Mercator Entwicklungsprojekt Umbrüche Gestalten. Sprachenförderung und -bildung als integrale Bestandteile innovativer Lehramtsausbildung in Niedersachsen
No full textRevisiting Reduction of CO 2 to Oxalate with First-Row Transition Metals: Irreproducibility, Ambiguous Analysis, and Conflicting Reactivity
No full textA comparison of deflation and the balancing Neumann-Neumann preconditioner
No full textIn this paper we compare various preconditioners for the numerical solution of partial differential equations. We compare the well-known balancing Neumann Neumann preconditioner used in domain decomposition methods with a so-called deflation preconditioner. We prove that the effective condition number of the deflated preconditioned system is always, i.e. for all deflation vectors and all restrictions and prolongations, below the condition number of the system preconditioned by the balancing Neumann-Neumann preconditioner. Even more, we establish that both preconditioners lead to almost the same spectra. The zero eigenvalues of the deflation preconditioned system are replaced by eigenvalues which are one if the balancing Neumann-Neumann preconditioner is used. Moreover, we proved that the A-norm of the errors of the iterates build by the deflation preconditioner is always below the A-norm of the errors of the iterates build by the balancing Neumann-Neumann preconditioner. Additionally, the amount of work of one iteration of the de ation preconditioned system is less than the amount of work of one iteration of the balancing Neumann-Neumann preconditioned system. Finally, we establish that the deflation preconditioner and the balancing Neumann-Neumann preconditioner produces the same iterates if one uses certain starting vectors. Numerical results for porous media flows emphasize the theoretical results.Electrical Engineering, Mathematics and Computer Scienc
A Thermodynamic Formalism Approach to the Selberg Zeta Function for Hecke Triangle Surfaces of Infinite Area
No full textWe provide an explicit construction of a cross section for the geodesic flow on infinite-area Hecke triangle surfaces, which allows us to conduct a transfer operator approach to the Selberg zeta function. Further, we construct closely related cross sections for the billiard flow on the associated triangle surfaces and endow the arising discrete dynamical systems and transfer operator families with two weight functions, which presumably encode Dirichlet respectively Neumann boundary conditions. The Fredholm determinants of these transfer operator families constitute dynamical zeta functions, which provide a factorization of the Selberg zeta function of the Hecke triangle surfaces.Volkswagen Foundatio
Anke Wegner / Inci Dirim (Hrsg.): Mehrsprachigkeit und Bildungsgerechtigkeit. Erkundungen einer didaktischen Perspektive. Opladen / Berlin / Toronto: Barbara Budrich 2016 (322 S.) [Rezension]
No full textRezension von: Anke Wegner / Inci Dirim (Hrsg.): Mehrsprachigkeit und Bildungsgerechtigkeit. Erkundungen einer didaktischen Perspektive. Opladen / Berlin / Toronto: Barbara Budrich 2016 (322 S.; ISBN 978-3-8474-0669-3; 39,90 EUR)
İnci Dirim / Anke Wegner (Hrsg.): Normative Grundlagen und reflexive Verortungen im Feld DaF_DaZ*. Opladen/Berlin/Toronto: Barbara Budrich 2018 (462 S.) [Rezension]
No full textRezension von: İnci Dirim / Anke Wegner (Hrsg.): Normative Grundlagen und reflexive Verortungen im Feld DaF_DaZ*. Opladen/Berlin/Toronto: Barbara Budrich 2018 (462 S.; ISBN 978-3-8474-0558-0; 49,90 EUR)
Funeral of theatre director František Neumann in Brno
No full textThe segment captures the funeral of theatre director František Neumann held in Brno on 27 February 1929. The coffin is carried out of the building of the Mahen Theatre and loaded onto a horse-drawn hearse. The funeral procession moves along the streets of Brno towards the railway station, where the coffin is placed in a special funeral carriage. The train leaves for Prostějov, Neumann´s final resting place. The footage includes two versions of the film capturing the same event
Chairs on Chairs: Mark Pimlott
No full textInterview by Malgorzata Neumann with Mark Pimlott.OLD Interio
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