3,342 research outputs found
Numerische Modellierungen von Röntgenwellenleitern unter Berücksichtung von Realstruktureffekten
No full textNumerische Modellierungen von Röntgenwellenleitern unter Berücksichtung von Realstruktureffekten
No full textWave optical simulations of x-ray nano-focusing optics
No full textSoftcover, 17x24Curved x-ray multilayer mirrors focus synchrotron beams down to tens of nano metres. A wave-optical theory describing propagation of two waves in an elliptically curved focusing multilayer mirror is developed in this thesis. Using numerical integration, the layer shapes can be optimised for reflectivity and aberrations. Within this framework, performance of both existing and currently upgraded synchrotron beamlines is simulated. Using a more theoretical model case, limits of the theory are studied. A significant part of this work is dedicated to partial spatial coherence, modelled using the method of stochastic superpositions. Coherence propagation and filtering by x-ray waveguides is shown analytically and numerically. This comprehensive model is put forward that shall help in development and testing of new algorithms for a variety of imaging techniques using coherent x-ray beams. Advanced simulations accounting for real structure effects are compared to experimental data obtained at the GINIX instrument at the coherence beamline P10 at PETRA III, DESY. This thesis presents results of a collaboration between the Georg-August-Universität Göttingen and the European Synchrotron Radiation Facility (ESRF) Grenoble
Georg Hermann.
No full textThe internationally renowned author of numerous novels, essays, and articles, Georg Hermann, was born as Georg Borchardt in Berlin-Friedenau on October 7, 1871, the youngest of six children in a well-established Jewish family. Later in life he used his father’s first name Hermann as his surname when writing. Contrary to the expectations for a young man from a reputable family, Hermann did not pursue the Abitur exam in a Gymnasium (secondary school), but instead received a one-year certificate in 1890, leaving school to become an apprentice salesman at a tie company. From 1896 until 1899 he worked in the Statistical Office of Berlin, at the same time attending literature and art history lectures at the University of Berlin. Afterwards he worked as a freelance writer and art critic.His first book, 'Spielkinder', was published in 1896, but he did not become well-known until 1906, with the publication of 'Jettchen Gebert', followed by its sequel, 'Henriette Jacoby'. These novels told the story of the life of a young woman living in Jewish Berlin during the Biedermeier period of the 1820s and 1830s. Politically active, Georg Hermann was also a member of the Central-Verein deutscher Staatsbürger jüdischen Glaubens.Having become known for his pacifist tendencies through his writing, and because of his Jewish heritage, Georg Hermann and his family fled to Holland shortly after the burning of the Reichstag in 1933. Although the rest of his family was saved from the Nazis after their occupation of Holland in 1943, Georg Hermann was sent to the Dutch concentration camp of Westerbork. On November 16, 1943 he was transported to Auschwitz and either died during transport or shortly after his arrival.Digital ImageRecord added to DigiTool. Aleph record suppressed. J. Palmisano 09/15/2010
Sammlung von Merckwürdigkeiten der Natur und Alterthümern des Erdbodens, welche petrificirte Cörper enthält
No full textaufgewiesen und beschrieben von Georg Wolffgang KnorrVorlageform des Erscheinungsvermerks: Nürnberg, zu finden bey dem Author. Gedruckt bey Andreas Bieling
Supplemental Material - Spinal Orthoses in the Treatment of Osteoporotic Thoracolumbar Vertebral Fractures in the Elderly: A Systematic Review With Quantitative Quality Assessment
No full textSupplemental Material for Spinal Orthoses in the Treatment of Osteoporotic Thoracolumbar Vertebral Fractures in the Elderly: A Systematic Review With Quantitative Quality Assessment by Philipp Pieroh, Ulrich J.A. Spiegl, Anna Völker, Sven Märdian, Nicolas H. von der Höh, Georg Osterhoff, Christoph-E. Heyde; Spine Section of the German Society for Orthopaedics and Trauma in Global Spine Journal</p
Georg Trakl and melancholy
No full textThis paper identifies some of the decisive aspects of Georg Trakl’s poetry, taking as the starting point the author’s awareness about God’s death, from Nietzsche’s approach. Emphasis is placed on melancholy, support of the creation, testimony and acknowledgement of failure and grief of mankind, from which the author was able to express his discouragement upon the downfall and decline of the West.Se identificaron algunos aspectos determinantes de la obra poética de Georg Trakl, tomando como punto de partida la conciencia del escritor acerca de la muerte de Dios, desde la perspectiva de Nietzsche. Se hizo un énfasis sobre la melancolía, soporte de la creación, testimonio y reconocimiento del errar y el duelo del hombre, a partir de la cual el autor pudo expresar el desconsuelo por la ruina y el ocaso de Occidente
Tractatio Jvridica De Concursu Novercæ Cum Privignis
No full textZugl.: Basel, Univ., Jur. Diss., 1728[Hermann Georg Krohn]A new edition, revised by the author, of his inaugural dissertation, Basel, 1728, published by G.C. Overbeck, with a conspectus of the chapters. Cf. prefIncludes bibliographical referencesWith: Rösener, Andreas Christoph. Andreae Christophori Röseneri j.u.d. Tractatus juridicus de libris mercatorum. Lipsiae : Sumptibus haeredum Friderici Lanckisii, literis Christiani Scholvini, [1694]. Copy 2. Bound together subsequent to publicationAutopsie nach Ex. der ULB Sachsen-AnhaltVorlageform des Erscheinungsvermerks: Lubecæ, Sumtibus Jonae Schmidt. MDCCXLVII
Wellenoptische Simulationen nanofokussierender Röntgen-Optiken
No full textGekrümmte Röntgen-Multilagen-Spiegel fokussieren Synchrotron-Strahlung auf wenige zehn Nanometer große Strahlflecke. Die Propagation zweier Lichtwellen durch elliptisch geformte fokussierende Multilagen-Spiegel wird durch eine wellenoptische Theorie beschrieben; dieser analytische Ansatz wird numerisch integriert. Mit diesem Verfahren kann die Schichtstruktur für hohe Reflektivität und geringe Strahl-Aberrationen optimiert werden. Wir zeigen Simulationen aktueller und neu entwickelter Synchrotron-Strahlrohre. Die Grenzen der Theorie werden anhand von Modell-Parametern untersucht.Ein weiterer Teil dieser Arbeit beschäftigt sich mit partieller räumlicher Kohärenz, modelliert mit der Methode der stochastischen Superpositionen. Propagation und Filterung der Kohärenzeigenschaften eines Röntgenstrahls in einem Wellenleiter werden analytisch und numerisch untersucht. Das vorgestellte, anschauliche Modell soll die Entwicklung und Überprüfung neuer Algorithmen im Bereich der kohärenten Abbildung unterstützen. Wir vergleichen die Ergebnisse von Simulationen, die auch Realstruktureffekte berücksichtigen, mit experimentellen daten aus dem GINIX-Instrument am Kohärenz-Strahlrohr P10 an der PETRA III-Quelle am DESY.Diese Arbeit zeigt Ergebnisse aus einer Kollaboration zwischen der Georg-August-Universität Göttingen und der European Synchrotron Radiation Facility (ESRF) in Grenoble.Curved x-ray multilayer mirrors focus synchrotron beams down to tens of nano metres. A wave-optical theory describing propagation of two waves in an elliptically curved focusing multilayer mirror is developed in this thesis. Using numerical integration, the layer shapes can be optimised for reflectivity and aberrations. Within this framework, performance of both existing and currently upgraded synchrotron beamlines is simulated. Using a more theoretical model case, limits of the theory are studied.A significant part of this work is dedicated to partial spatial coherence, modelled using the method of stochastic superpositions. Coherence propagation and filtering by x-ray waveguides is shown analytically and numerically. This comprehensive model is put forward that shall help in development and testing of new algorithms for a variety of imaging techniques using coherent x-ray beams. Advanced simulations accounting for real structure effects are compared to experimental data obtained at the GINIX instrument at the coherence beamline P10 at PETRA III, DESY.This thesis presents results of a collaboration between the Georg-August-Universität Göttingen and the European Synchrotron Radiation Facility (ESRF) Grenoble
Sammlung von Merckwürdigkeiten der Natur und Alterthümern des Erdbodens, welche petrificirte Cörper enthält / aufgewiesen und beschrieben von Georg Wolffgang Knorr
No full textVorlageform des Erscheinungsvermerks: Nürnberg, zu finden bey dem Author. Gedruckt bey Andreas Bieling
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