Science.gov

Sample records for quantitative bestimmung von

  1. Direkte Bestimmung von Zylindern aus 3D-Punkten ohne Nutzung von Oberflchennormalen

    E-print Network

    Direkte Bestimmung von Zylindern aus 3D-Punkten ohne Nutzung von Oberflächennormalen Christian BEDER und Wolfgang FÖRSTNER Zusammenfassung Die automatische Extraktion von Zylindern aus 3D-Punktwolken ist von zentraler Bedeutung bei der Auswertung von Laserscannerdaten insbesondere bei Industrieanlagen

  2. Remote Sensing Messungen zur on-road Bestimmung der

    E-print Network

    Denver, University of

    LUBETRAX Remote Sensing Messungen zur on-road Bestimmung der Abgase von schweren Motorfahrzeugen, Chur, Zürich, Brugg Dr. Peter Maly (Projektleitung) Dr. Stefan Scherer Dr. G.A. Bishop (Remote Sensing;Inhaltsverzeichnis Zusammenfassung 1 1. Einleitung und Zielsetzung 3 1.1 Remote Sensing Messungen (FEAT) 4 1

  3. Quantitative Analyse von Korallengemeinschaften des Sanganeb-Atolls (mittleres Rotes Meer). I. Die Besiedlungsstruktur hydrodynamisch unterschiedlich exponierter Außen- und Innenriffe

    NASA Astrophysics Data System (ADS)

    Mergner, H.; Schuhmacher, H.

    1985-12-01

    The Sanganeb-Atoll off Port Sudan is an elongate annular reef which rests on a probably raised block in the fracture zone along the Red Sea-graben. Its gross morphology was most likely formed by subaerial erosion during low sealevel conditions. Features of its topography and hydrography are described. The prevailing wind waves are from NE, Hence, the outer and inner reef slopes are exposed to different hydrodynamic conditions. The sessile benthos was analysed using the quadrat method. Four test quadrats (5×5 m each) were selected on the outer and inner slopes at a depth of 10 m along a SSW-NNE transect across the atoll. Cnidaria were by far the most dominating group; coralline algae, Porifera, Bryozoa and Ascidia, however, counted for just under 3 % living cover. Light and temperature intensities did not differ significantly at the sites studied; water movement, however, decreased in the following order: TQ IV (outer NE side of the reef ring) was exposed to strong swell and surf; TQ II (inner side of the SW-ring) was met by a strong longreef current; TQ I was situated on the outer lee of the SW-atoll ring and TQ III in the inner lee of the NE-side. This hydrodynamic gradient correlates with the composition of the coral communities from predominantly branching Scleractinia (staghorn-like and other Acropora species and Pocillopora) in TQ IV, through a Lobophyllia, Porites and Xenia-dominated community in TQ II, and a mixed community with an increasing percentage of xeniid and alcyoniid soft corals in TQ I, to a community in TQ III which is dominated by the soft corals Sinularia and Dendronephthya. The cnidarian cover ranged between 42.4 and 56.6 % whereby the two exposed test quadrats had a higher living coverage than the protected ones. In total, 2649 colonies comprising 124 species of stony, soft and hydrocorals were recorded by an elaborate method of accurate in-situ mapping. The 90 scleractinian species found include 3 species new to the Red Sea and 11 hitherto unknown species from its central part. Only 7 cnidarian species covered large areas, forming a Xenia macrospiculata-zone in TQ I, a Lobophyllia corymbosa-zone in TQ II, a Sinularia-Dendronephthya-zone in TQ III and an Acropora-Pocillopora verrucosa-zone in TQ IV. Hydrodynamic exposition and ratio of genus abundance Acropora: Montipora are closely correlated: on the windward side (TQ IV) it is 943:4, but on the leeward side (TQ I) 18:208. Apart from the taxonomic and quantitative distribution of species and colonies, types of growth form and categories of the dead substrate are given. Since soft corals do not contribute to the reef framework, the distribution of Scleractinia and Alcyonaria indicates that at Sanganeb-Atoll reef substance is mainly generated on the windward side.

  4. Evolutionäre Algorithmen zur Topologieentwicklung von Neuronalen Netzen für die Roboter-Navigation im praktischen Einsatz

    NASA Astrophysics Data System (ADS)

    Köpsel, T.; Noglik, A.; Pauli, J.

    Eine wichtige Frage in der mobilen Robotik ist die sichere Navigation in unbekannten Umgebungen unter der Anwendung preiswerter Sensorik. Solch eine Navigation kann ein künstliches Neuronales Netz (kNN) übernehmen, welches die Kopplung der Sensoren des Roboters mit dessen Antriebssystem herstellt. "Neuro Evolution of Augmenting Topologies“ (NEAT) von Stanley und Miikkulainen [1] verwendet den Evolutionären Ansatz sowohl für die Topologieentwicklung, als auch für die Bestimmung der Gewichte eines kNN. NEAT hat sich als sehr gut, anpassungsfähig und relativ einfach in der Anwendung gezeigt. In diesem Beitrag wird NEAT in der Simulation angewendet, um ein kNN, das die Navigation des Roboters übernimmt, zu erhalten. Der Fokus liegt dabei auf der Erstellung der Fitnessfunktion und die Spezifikation und Durchführung einer realitätstreuen Simulation für den praktischen Einsatz. Die enge Verknüpfung von Realität und Simulationswelt hat entscheidend dazu beigetragen, dass der Umstieg aus der Simulation in die reale Welt ein Erfolg (höhere Anpassungsfähigkeit) wird. Dieser Artikel basiert auf der Diplomarbeit von [2].

  5. Portrts von Mnnern im Aufbruch

    E-print Network

    Manstein, Dietmar J.

    Neue Wege Porträts von Männern im Aufbruch Information #12;Neue Wege Porträts von Männern im . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 IV . . Von .Lebenselixieren .und .Lernkurvern . . Helga .Lukoschat/Carlo Philippi ­ .Von

  6. Implementierung von Algebren in

    E-print Network

    Güting, Ralf Hartmut

    Implementierung von Algebren in SECONDO M. Spiekermann Algebra Module Implementierung von Datentypen Implementierung von Operatoren Stromverarbeitung Implementierung von Algebren in SECONDO M. Spiekermann (Fernuniversit¨at in Hagen) Implementierung von Algebren in SECONDO 12.10.2007 1 / 21 #12

  7. Von Willebrand Disease

    MedlinePLUS

    ... get the proper diagnosis and treatment. What Is von Willebrand Disease? When people have von Willebrand disease ( ... guys can have vWD. Continue The Types of von Willebrand Disease There are different kinds of vWD: ...

  8. Erweiterung von SECONDO

    E-print Network

    Güting, Ralf Hartmut

    Erweiterung von SECONDO Thomas Behr Erweiterung von SECONDO Attributdatentypen Thomas Behr Fakultät 2014 FernUniversität in Hagen #12;Erweiterung von SECONDO Thomas Behr Attributdatentypen Werte können in Relationen gespeichert werden sind von der Klasse Attribute abgeleitet haben bestimmte Anforderungen an die

  9. Hermann von Helmholtz / von Julius Reiner. Elektronische Ausgabe des 1. (biographischen) Teils erstellt von Gabriele Drflinger

    E-print Network

    Gertz, Michael

    Hermann von Helmholtz / von Julius Reiner. Elektronische Ausgabe des 1. (biographischen) Teils Heidelberger Texte zur Mathematikgeschichte Hermann von Helmholtz von Dr. Julius Reiner Elektronische Ausgabe (1871­1930): Hermann von Helmholtz / von Dr. Julius Reiner. - Leipzig : Theod. Thomas, [1905]. - 203 S

  10. Aufbau von Beschleunigern und Experimenten Aufbau von Beschleunigern

    E-print Network

    Aufbau von Beschleunigern und Experimenten Aufbau von Beschleunigern und Experimenten Von der, wurde von ZMEA eine Hebe- und Verschie- bevorrichtung für das etwa 15 m lange und 3000 kg schwere kalte: In DORIS wurden im Quadranten SL zwei Kicker gewechselt. PETRA: Für die geplante Nutzung von PETRA als

  11. Ernst Wichert Heinrich von Plauen

    E-print Network

    Wagner, Stephan

    Ernst Wichert Heinrich von Plauen Korrekturlesung beendet: Juni 2013 (Helmut Prodinger) #12;-- 2 -- 1. DIE »MARIA VON DANZIG« Es war im Frühling des Jahres 1410, nicht lange vor Pfing- sten. �ber die voll in die Segel der »Maria von Danzig«, die ihren Kurs auf die Landspitze von Hela nahm, von der sie

  12. Modellierung von Gasen/ Volumetrische Wolken

    E-print Network

    Schenzel, Peter

    Modellierung von Gasen/ Volumetrische Wolken VERFASST F�R DAS DIPLOMANTENSEMINAR ,,Computergrafik" IM SS 07 VON SANDRA HOFFMANN #12;�bersicht Geschichte Wolkemodellierung Allgemeines ­ Rauschen Rascharten Turbulenz Ansätze zur Modellierung von Gasen/Wolken Modellierung von Gas ­ Verwendung von

  13. Theodore von Karman

    NASA Technical Reports Server (NTRS)

    1926-01-01

    Theodore von Karman. NACA: In the eyes of most aeronautical experts, the overall record of Max Munk in aerodynamic research falls short of that achieved by fellow immigrant Theodore von Karman (the short man in the double breasted coat in the middle), shown here visiting Langley in December 1926. People in the photo include Max Munk, aerodynamic researcher; Theodore von Karman; George Lewis, director of research; Henry Reid, engineer in charge; Fred Weick, PRT head; Paul Hemke; Elliott Reid, future Stanford University Professor.

  14. Leopold von Buch

    USGS Multimedia Gallery

    This portrait of Leopold von Buch(1774-1853) was painted in the 1920s by Abner Lowe. Geologist, Paleontologist, and Graduate of the mining academy, Frieburg, Germany, von Buch is largely known for finding flaws in Abraham G. Werner's hypothesis (rocks from aqueous origins). Some of his more importan...

  15. Dr. Wernher von Braun

    NASA Technical Reports Server (NTRS)

    2004-01-01

    Dr. von Braun is looking out from a 10th floor window of building 4200 at the Marshall Space Flight Center (MSFC). He was the first Center Director and served as the Director from July 1960 through February 1970. Following World War II, Dr. von Braun and his German colleagues arrived in the United States under the Project Paperclip (American acquisition of German rocket experts) to continue their rocket development work. In 1950, von Braun and his German Rocket Team (also called the Peenemuende Team) were transferred from Ft. Bliss, Texas to Huntsville, Alabama to work for the Army's rocket program at Redstone Arsenal and later, NASA's Marshall Space Flight Center (MSFC). Under Dr. von Braun's leadership, MSFC developed the Saturn V launch vehicle, which placed the first men, two American astronauts, on the Moon. Wernher von Braun's life was dedicated to expanding man's knowledge through the exploration of space.

  16. N Fehlfunktionen von Proteinen sind Auslser fr eine Vielzahl von

    E-print Network

    Gerwert, Klaus

    N Fehlfunktionen von Proteinen sind Auslöser für eine Vielzahl von Krankheiten. Das Verständnis der Struktur, Funktion und Interaktion von Proteinen auf der molekularen Ebene liefert die Grundlage für eine schon routinemäßig die Raum- struktur von Proteinen bestimmen. Allerdings zeigt diese Struktur meist den

  17. Oberflachenverbindungen von bergangsmetallen. XLI [1] Darstellung und Eigenschaften von Chromorganylen

    E-print Network

    Bluemel, Janet

    OberflaÈchenverbindungen von Ûbergangsmetallen. XLI [1] Darstellung und Eigenschaften von der Umsetzung von reduzierten Phil- lips-Katalysatoren mit Ethylen bei 300 °C wird der Katalysa- tor Chromatographie werden Fraktionen von Organochrom-Verbindungen erhalten, die sich um CH2-Einheiten unterscheiden

  18. Von Roger Kndig Pfffikon Das Bro von Sascha Thni

    E-print Network

    Giger, Christine

    Von Roger Kündig Pfäffikon ­ Das Büro von Sascha Thöni am Institut für Kartografie und Geo zutape- ziert mit Landkarten aus aller Welt. Nur zwei hängen da: eine der Stadt Zürich und eine von, dass ich die Stelle hier am Institut bekomme», sagt Thöni. Er ist ein beken- nender Fan von Neuseeland

  19. ber die Erhebung von Gebhren fr das Studium von Gaststudierenden

    E-print Network

    Hofmann, Martin

    Satzung über die Erhebung von Gebühren für das Studium von Gaststudierenden an der Ludwig-Maximilians-Universität München Vom 4. Juli 2011 Auf Grund von Art. 13 Abs. 1 Satz 2 in Verbindung mit § 2 Abs. 1 Satz 2 der Ver- ordnung über die Erhebung von Gebühren für die Teilnahme von Studierenden an speziellen Angeboten des

  20. Seite 1 von 3 Pressemeldung

    E-print Network

    Manstein, Dietmar J.

    Seite 1 von 3 Pressemeldung Nicht-halluzinogenes LSD-Derivat zur Behandlung von Cluster halluzinogene Variante von LSD für die Behandlung von Cluster-Kopfschmerz zu entwi- ckeln. Die neurologische LSD erfolgreich zur Behandlung ihrer Erkrankung eingesetzt hatten. Außerdem haben sie umfassende

  1. Understanding von Neumann's entropy

    E-print Network

    Jonas Maziero

    2015-06-03

    We review the postulates of quantum mechanics that are needed to discuss the von Neumann's entropy. We introduce it as a generalization of Shannon's entropy and propose a simple game that makes easier understanding its physical meaning.

  2. von Willebrand Disease

    MedlinePLUS

    ... Willebrand Disease? Von Willebrand disease (VWD) is a bleeding disorder. It affects your blood's ability to clot. If ... work well in people who have hemophilia , another bleeding disorder. VWD is more common and usually milder than ...

  3. Bewertung von Fahrzeuggeräuschen

    NASA Astrophysics Data System (ADS)

    Genuit, Klaus; Schulte-Fortkamp, Brigitte; Fiebig, André; Haverkamp, Michael

    Bei der Wahrnehmung und Beurteilung eines Automobils sind unzählige Merkmale und Eigenschaften von Bedeutung. Dabei können Merkmale objektiv-technisch beschrieben werden, wie Angaben zur Motorisierung, Höchstgeschwindigkeit, Drehmoment, zulässige Zuladung, Verbrauch usw. Daneben sind weitere Eigenschaften von Bedeutung, die sich einer einfachen objektiv-technischen Beschreibung entziehen. Hier sind Begriffe zu nennen, wie Sicherheit, allgemeine Qualitätsanmutung, Design, Ergonomie, Komfort, Haptik, Fahrdynamik, Zuverlässigkeit, die deutlich schwieriger objektiv erfassbar und beschreibbar sind (Abb. 4.1).

  4. Optical von Neumann measurement

    E-print Network

    G. M. D'Ariano; M. F. Sacchi

    1997-05-12

    We present an optical scheme that realizes the standard von Neumann measurement model, providing an indirect measurement of a quadrature of the field with controllable Gaussian state-reduction. The scheme is made of simple optical elements, as laser sources, beam splitters, and phase sensitive amplifiers, along with a feedback mechanism that uses a Pockels cell. We show that the von Neumann measurement is achieved without the need of working in a ultra-short pulsed regime.

  5. Optical von Neumann measurement

    E-print Network

    D'Ariano, G M

    1997-01-01

    We present an optical scheme that realizes the standard von Neumann measurement model, providing an indirect measurement of a quadrature of the field with controllable Gaussian state-reduction. The scheme is made of simple optical elements, as laser sources, beam splitters, and phase sensitive amplifiers, along with a feedback mechanism that uses a Pockels cell. We show that the von Neumann measurement is achieved without the need of working in a ultra-short pulsed regime.

  6. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun (right), Deputy Associate Administrator for Planning, National Aeronautics and Space Administration, inspects the mockup of the Saturn Workshop during a visit marking the 10th anniversary of the Marshall Center. Shown with Dr. Von Braun, from left to right, are Karl Heimburg, Director of the Astronautics Lab; Herman K. Weidner, Director of Science and Engineering, and George Hardy of the Astronautics Lab.

  7. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun (right), Deputy Associate Administrator for planning, National Aeronautics and Space Administration, inspects the mockup of the Saturn Workshop during a visit marking the 10th anniversary of the Marshall Center. Shown with Dr. Von Braun, from left to right, are Karl Heimburg, Director of the astronautics lab; Herman K. Weidner, Director of Science and Engineering, and George Hardy of the Astronautics lab.

  8. Seite 1 von 7 MATHEMATISCHE FILMLISTE

    E-print Network

    Seite 1 von 7 MATHEMATISCHE FILMLISTE Zusammengestellt von Martin Mattheis, Frauenlob-Gymnasium; Mathematische Filmliste Seite 2 von 7 Zusammengestellt von Martin Mattheis, Frauenlob-Gymnasium Mainz Stand: 19

  9. Bachelorarbeit Integration von PDF-Formularen als

    E-print Network

    Bachelorarbeit Integration von PDF-Formularen als Benutzerschnittstelle von computergenerierten Aufgaben in LON-CAPA Vorgelegt von: Thomas Onken Emden, Juli 2008 Betreut von : Prof. Dr. Gerd von Cölln/Ostfriesland/Wilhemshaven Fachbereich Technik Studiengang Medientechnik Thema : Integration von PDF-Formularen als Benutzerschnittstelle

  10. Living with von Willebrand Disease

    MedlinePLUS

    ... With von Willebrand Disease If you have von Willebrand disease (VWD), you can take steps to prevent bleeding and stay healthy. For example, avoid over-the-counter medicines that can affect blood clotting, such as aspirin, ...

  11. Ubungsblatt 9 Computersimulation von Plasmen

    E-print Network

    Kull, Hans-Jörg

    Ubungsblatt 9 16.01.01 Computersimulation von Plasmen Prof. Dr. H.-J. Kull Lehr- und Anfangsgeschwindigkeit (abhangig von seiner Anfangspo- sition) vp(xp) = v0 sin(4 xp=L) haben soll. Beobachten Sie die

  12. Ubungsblatt 2 Computersimulation von Plasmen

    E-print Network

    Kull, Hans-Jörg

    Ubungsblatt 2 08.11.00 Computersimulation von Plasmen Prof. Dr. H.-J. Kull Lehr- und jeweils halbieren, bis ein relativer Fehler von 10;8 erreicht ist. Wahlen Sie zu Beginn als Schrittweite die Lange des Integrationsintervalls. b) Verwenden Sie die Ergebnisse von jeweils zwei

  13. Seite 1 von 63 Modulhandbuch

    E-print Network

    Rossak, Wilhelm R.

    Seite 1 von 63 Modulhandbuch der Pflichtmodule für den Bachelor-Studiengang Werkstoffwissenschaft-Schiller-Universität Jena Stand: 01.07.2015 #12;Seite 2 von 63 Inhalt Mathematik I .......................................................................................................................... 9 Experimentalphysik II, Teil 1 (von 2

  14. Ubungsblatt 10 Computersimulation von Plasmen

    E-print Network

    Kull, Hans-Jörg

    Ubungsblatt 10 30.01.01 Computersimulation von Plasmen Prof. Dr. H.-J. Kull Lehr- und Parameter: I = 16384 J = 512 p = !p t = 0:01 v0 = 0:1: Hinweis: Plotten Sie exemplarisch die Bahnen von 32 Teilchen. b) Variieren Sie die Geschwindigkeitsamplitude v0, und bestimmen Sie, bei welchem Wert von v0

  15. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Shown viewing the Apollo telescope mockup are, from left to right, Charles Donlan, deputy associate administrator for manned space flight; Dr. Wernher Von Braun, Marshall Space Flight Center director; William Horton, astrionics lab; Dr. Thomas Paine, NASA deputy administrator; Warner Kuers, director of the ME lab.

  16. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    A camerman catches Dr. Wernher Von Braun, Director of the Marshall Space Flight Center, his son, Peter, and daughter, Martgrit, as they arrive at the employee picnic held to celebrate man's first landing on the moon 6 days earlier. In the foreground is David R. Newby, Director of Administration and Technical Services at the Marshall Space Flight Center.

  17. Missbrauchspotential von Verzeichnisdienst-Metadaten in LDAP-basierten System- und Benutzerverwaltungen

    NASA Astrophysics Data System (ADS)

    Pluta, Daniel

    Metadaten stellen Zusatzinformationen über elektronisch gespeicherte Kerninformationen zur Verfügung. Sie ergänzen die eigentliche Hauptinformation um nützliche Details. In vielen Bereichen werden Metadaten gespeichert und stehen zur Auswertung zur Verfügung. Alle IT-nahen Systeme, angefangen im Konsumerbereich (z.B. digitale Kameras) bis hin zu unternehmenskritischen Applikationen führen im Hintergrund Metadaten - parallel zu den eigentlichen Hauptdaten. Metadaten im Allgemeinen sind per se als neutral, d.h. weder positiv noch negativ, zu bewerten. So wirken sich diese häufig positiv auf das Finden und Sortieren von digitalen Dokumenten aus. Negativ treten Metadaten eigentlich immer nur dann in Erscheinung, sobald diese ursprünglich zusätzlichen und nützlichen (und daher im Gegensatz zu den Hauptdaten nicht besonders beachteten bzw. geschützten) Informationen entgegen ihrer Bestimmung, zweckentfremdet werden. Auch Verzeichnisdienste verfügen über solche nützlichen Metadaten zu den jeweils in ihnen gespeicherten Inhalten. Ob, und wenn ja wie weit diese nützlichen Inhalte auch ein Risiko darstellen können wird im Rahmen dieses Artikels anhand eines konkreten Szenarios aus dem Umfeld des Systemmanagements gezeigt.

  18. Dr. von Braun at 'Wernher von Braun Day' Celebration

    NASA Technical Reports Server (NTRS)

    1970-01-01

    In 1970 Marshall Space Flight Center (MSFC) Director Dr. Wernher von Braun (right) was reassigned to NASA Headquarters to serve as Deputy Associate Administrator for Plarning. Prior to his transfer, Dr. von Braun was honored for his career in Huntsville, Alabama, with the celebration of 'Wernher von Braun Day.' Among those participating were Alabama Governor Albert Brewer (left) and Alabama Senator John Sparkman (center). (Courtesy of Huntsville/Madison County Public library)

  19. Violence and Conflict Resolution in Hartmann von Aue's Erec and Iwein, Wirnt von Grafenberg's Wigalois, and Wolfram von Eschenbach's Parzival

    E-print Network

    Piltingsrud, Melanie

    2014-08-31

    consider these aspects of violence in four courtly works: 1) Erec (circa 1190) and 2) Iwein (circa 1203), by Hartmann von Aue, 3) Wigalois (circa 1210), by Wirnt von Grafenberg, and 4). Parzival (circa 1210), by Wolfram von Eschenbach, analyzing...

  20. Heft 167 Thomas Dreher Selektive Sedimentation von

    E-print Network

    Cirpka, Olaf Arie

    Heft 167 Thomas Dreher Selektive Sedimentation von Feinstschwebstoffen in Wechsel- wirkung mit wandnahen turbulenten Strömungsbedingungen #12;Selektive Sedimentation von Feinstschwebstoffen in Wechselwirkung mit wandnahen turbulenten Strömungsbedingungen Von der Fakultät Bau- und

  1. Theodore von Karman

    NASA Technical Reports Server (NTRS)

    1950-01-01

    Dr. Theodore von Karman, co-founder of the Jet Propulsion Laboratory (JPL) Pasadena, California was an aeronautical theoretician. His contributions in the fields of aerodynamics and aeronautical engineering are well documented and well known to every aerospace engineer. He was the first winner of the prestigious U.S. Medal of Science presented to him by President John F. Kennedy. As well as being co-founder of JPL, he also was principal founder of a major rocket propulsion firm (Aerojet-General Corp.), the top science advisor to the U.S. Air Force during its transition to jet propulsion aircraft and the top science advisor to NATO. He was, during much of this time, the fountainhead of aerodynamic thought as head of the Guggenheim Aeronautical Laboratory at the California Institute of Technology (GALCIT) in Pasadena, California. In the May 1956 issue of the Journal of Aeronautical Sciences, it was said of him that 'No other man has had so great an impact on the development of aeronautical science in this country. Hundreds of young men became his students and scientific collaborators and were inspired to greater effort.' Dr. William H. Pickering, then director of JPL said in 1960 'We wouldn't have an aeronautical science as we know it today, if it weren't for Dr. Thoedore von Karman.' Under his guidance, Caltech's 10 foot wind tunnel was designed, built and operated. Industry firms such as Douglas, Northrop, Hughes, Lockheed, North American, Vultee and Consolidated all tested new aeronautical designs and concepts in GALCIT's tunnel. Even Boeing's own high-speed wind tunnel was heavily influenced by suggestions from von Karman. The National Advisory Committee for Aeronautics (NACA) became so concerned about GALCIT's growing influence over West coast aviation, it erected the Ames Laboratory in Sunnyvale, California in part to deter an ever widening aeronautical gap that had formed between NACA and GALCIT. From 1936 to 1940, Caltech stood alone as the only university-based rocket research center. Von Karman gambled his prestige by supporting Frank Malina and H.S. Tsien's work on rocketry. Other institutions of higher learning dismissed such research as 'fantastical' and left such endeavors to visionaries like Robert Goddard. Foundational theoretical research by Von Karman gave rise to the first successful solid-fuel rocket engine firings. This led to federal funding for studies that lead to a form of aircraft rocket propulsion called Jet Assisted Take-Off or (JATO). Success in this endeavor led to von Karman establishing two more highly regarded institutions; both originally dedicated to rocketry: the Aerojet Engineering Company and the Jet Propulsion Laboratory. The last years of his life were spent in Paris, his favorite city. His interest in aeronautical research and contributions to it never waned. He organized in Paris the NATO Advisory Group for Aeronautical Research and Development (AGARD). Staffed by American and European scientists eager to serve, its many committees investigated such disciplines as propulsion, aerodynamics and electronics. The legacy of his personable leadership and 'soft touch' approach to problem solving was only equalled by his genius.

  2. Entwickeln von produktbegleitenden Dienstleistungen

    NASA Astrophysics Data System (ADS)

    Strube, Michaela; Nixdorf, Steffen; Dahl, Bodo

    Leistungselektronische Komponenten werden aufgrund ihrer komplexen Baustrukturen und der häufig geringen Losgrößen hauptsächlich in zeitintensiver Handarbeit gefertigt. Damit solche Prozesse am Standort Deutschland verbleiben können, ist es notwendig, deren Effizienz zu steigern. Neue Formen der Arbeitsteilung zwischen Zulieferern, Herstellern und Kunden können einen wichtigen Beitrag leisten, sind aber ohne produktbegleitende Dienstleistungen nicht realisierbar [Lay u. Jung Erceg 2002]. Volkholz fasst das wie folgt zusammen: Wer für den Erhalt von industrieller Produktion in Deutschland ist, muss sich für Dienstleistungen interessieren" [Volkholz 1996]. Die produktbegleitende Dienstleistung als Ergänzung des Fertigungsprozesses und Erweiterung des Angebots muss konsequent, systematisch und zielgerichtet entwickelt werden. Nur dann kann diese Dienstleistungsinnovation über einen marktgerechten Preis beim Abnehmer platziert werden.

  3. Dr. von Braun Helicopter Tour

    NASA Technical Reports Server (NTRS)

    1968-01-01

    This photograph was published by the Marshall Space Flight Center (MSFC) on May 1, 1968. Dr. von Braun and Dr. Pain visited both the Michoud Assembly Facility (MAF) and the Mississippi Test Facility (MTF) via helicopter during their tour. This photograph shows Dr. von Braun, second from left, and Dr. Pain, far right, arriving at the MAF heliport.

  4. Zum Tod des Physiologen und Physikers Hermann von Helmholtz / ... neu hrsg. von Gabriele Drflinger

    E-print Network

    Gertz, Michael

    Zum Tod des Physiologen und Physikers Hermann von Helmholtz / ... neu hrsg. von Gabriele Dörflinger.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html #12;Zum Tod des Physiologen und Physikers Hermann von Helmholtz von Franz Werner Quelle: Zeitschrift f Texte zur Mathematikgeschichte #12;Hermann von Helmholtz1 (1821-1894), Mitbegr¨under der empirischen

  5. Zuf allige Erzeugung von Catalan-Strukturen Diplomarbeit von Dorothea Rochusch

    E-print Network

    Felsner, Stefan

    Zuf allige Erzeugung von Catalan-Strukturen Diplomarbeit von Dorothea Rochusch betreut von Dr-Objekte . . . . . . . . . . . . 5 2.2 Eigenschaften der Catalanzahlen . . . . . . . . . . . . . . . . . . . 10 3 Erzeugung von g ultigen Klammersequenzen 12 3.1 Algorithmus von M.D. Atkinson und J.R. Sack . . . . . . . . . . . 12 3

  6. TTO-VON-GUER ICKE-UNIVERSIT

    E-print Network

    O TTO-VON-GUER ICKE-UNIVERSIT ÄTMAGDEBUR G Otto-von-Guericke-Universit¨at Magdeburg Fakult¨at f Durchsatzsteigerung von bis zu 95% gegen¨uber der Nutzung eines einzigen Funkkanals. Weiterhin wurde nachgewiesen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.1.1 Maßnahmen zur Erm¨oglichung zuverl¨assiger Kommunikation . 23 3.1.2 Verarbeitung von Paketen

  7. Die Bedeutung von Abhngigkeitsstrukturen in der

    E-print Network

    Schmidt, Klaus D.

    ab Die Bedeutung von Abhängigkeitsstrukturen in der Rückversicherung Dresdner Versicherungsforum ­ 23. Juni 2006 Dr. Ekkehard Kessner #12;Seite 2 ab Abhängigkeiten von Risiken Die Kenntnis über ursächliche oder statistisch belegbare Abhängigkeiten von Risiken ist von Bedeutung für die

  8. von Karman Vortices

    NASA Technical Reports Server (NTRS)

    2002-01-01

    Each of these swirling clouds is the result of a meteorological phenomenon known as a von Karman vortex. These vortices appeared over Alexander Selkirk Island in the southern Pacific Ocean. Rising precipitously from the surrounding waters, the island's highest point is nearly a mile (1.6 km) above sea level. As wind-driven clouds encounter this obstacle, they flow around it to form large, spinning eddies. This image was acquired by Landsat 7's Enhanced Thematic Mapper plus (ETM+) sensor on September 15, 1999. This is a false-color composite image made using shortwave infrared, infrared, and near-infrared wavelengths. Image provided by the USGS EROS Data Center Satellite Systems Branch.

  9. 9. PRDIKATENLOGIK: 9.1 Das Vokabular von PL

    E-print Network

    Schroeder-Heister, Peter

    9. PR�DIKATENLOGIK: SYNTAX 9.1 Das Vokabular von PL 9.2 Ausdruck von PL 9.3 Metavariablen von PL 9.4 Quantoren von PL 9.5 Atomare Formel von PL 9.6 Formel von PL 9.7 Logischer Operator von PL 9.8 Ausdrücke von PL und Formeln von PL 9.9 Teilformel und Hauptoperator 9.10 Der Bereich eines Quantors 9.11 Gebundene

  10. Experimental Quantum Cryptography Diplomarbeit von

    E-print Network

    Weinfurter, Harald

    Experimental Quantum Cryptography Diplomarbeit von Henning Weier angefertigt unter der Anleitung Classical Cryptography 7 2.1 Overview: DES and Triple DES . . . . . . . . . . . 18 2.6.2 Asymmetric Cryptography: RSA

  11. Ökologische Aspekte von Thin Clients

    NASA Astrophysics Data System (ADS)

    von Knermann, Christian

    Hersteller von IT-Technologie haben angesichts der Debatte um Klimaschutz und Nachhaltigkeit erkannt, dass für Endkunden, ob privat oder gewerblich, auch ökologische Gesichtspunkte beim Kauf von PC, Laptop oder Netzwerkgeräten eine immer größere Rolle spielen und Energie- oder Ökoeffizienz der Geräte kaufentscheidend wirken können. Betrachtet und bewertet wurden bislang aber hauptsächlich isolierte Einzelaspekte, wie der Energieverbrauch in der Nutzungsphase oder der Einsatz toxikologisch unbedenklicher Stoffe. Was fehlt, ist eine ganzheitliche Ausrichtung auf Nachhaltigkeit über die Lebensphasen Produktion, Nutzung sowie Recyling/Entsorgung.

  12. Richard von Volkmann

    PubMed Central

    Willy, Christian; Schneider, Peter; Engelhardt, Michael; Hargens, Alan R.

    2008-01-01

    Richard von Volkmann (1830–1889), one of the most important surgeons of the 19th century, is regarded as one of the fathers of orthopaedic surgery. He was a contemporary of Langenbeck, Esmarch, Lister, Billroth, Kocher, and Trendelenburg. He was head of the Department of Surgery at the University of Halle, Germany (1867–1889). His popularity attracted doctors and patients from all over the world. He was the lead physician for the German military during two wars. From this experience, he compared the mortality of civilian and war injuries and investigated the general poor hygienic conditions in civilian hospitals. This led him to introduce the “antiseptic technique” to Germany that was developed by Lister. His powers of observation and creativity led him to findings and achievements that to this day bear his name: Volkmann’s contracture and the Hueter-Volkmann law. Additionally, he was a gifted writer; he published not only scientific literature but also books of children’s fairy tales and poems under the pen name of Richard Leander, assuring him a permanent place in the world of literature as well as orthopaedics. PMID:18196438

  13. ber die Differentiation von transzendenten Funktionen

    E-print Network

    Kapitel VI Über die Differentiation von transzendenten Funktionen Leonhard Euler §178 Außer den-Nummer E212, übersetzt von: Alexander Aycock, Textsatz: Arseny Skryagin, im Rahmen des Projektes ,,Euler

  14. fr die Verarbeitung personenbezogener Daten von Studienbewerberinnen und Studienbewerbern und von Mitgliedern sowie

    E-print Network

    Steinhoff, Heinz-Jürgen

    ORDNUNG für die Verarbeitung personenbezogener Daten von Studienbewerberinnen und Studienbewerbern und von Mitgliedern sowie Angehörigen der Universität Osnabrück, die nicht in einem Dienst- oder-Kraft-Treten..................................................................................................................... 8 #12;3 § 1 Allgemeines (1) Die Universität kann von Studienbewerberinnen/ Studienbewerbern und von

  15. Aufbau und Vergleich von Karten mit Hilfe von annotierten Mittelachsen zur

    E-print Network

    -/Lokalisierung Studienarbeit Richard Bade Richard.Bade@student.uni-magdeburg.de Otto-von-Guericke-Universität Magdeburg 39106 Magdeburg Unter Betreuung von: Michael Fiegert Michael.Fiegert@siemens.com Siemens AG CT IC 6 OttoAufbau und Vergleich von Karten mit Hilfe von annotierten Mittelachsen zur Re

  16. Exkurs 6 in der Mengenlehre: Verkettung von Abbildungen Exkurs 6 in der Mengenlehre: Verkettung von Abbildungen

    E-print Network

    Matveev, Vladimir S.

    Exkurs 6 in der Mengenlehre: Verkettung von Abbildungen #12;Exkurs 6 in der Mengenlehre: Verkettung von Abbildungen A, B, C seien die Mengen, #12;Exkurs 6 in der Mengenlehre: Verkettung von Abbildungen A, B, C seien die Mengen, #12;Exkurs 6 in der Mengenlehre: Verkettung von Abbildungen A, B, C seien

  17. Spuren von Massenbewegungen auf dem Grund des Vierwaldstttersees bei Weggis: Die Ereignisse von 1601 und 1795

    E-print Network

    Gilli, Adrian

    83 Spuren von Massenbewegungen auf dem Grund des Vierwaldstättersees bei Weggis: Die Ereignisse von- gangenheit wiederholt von subaquatischen Massenbewegungen erfasst (z. B. Schnell- mann et al. 2006). Die zwei jüngsten Gross- ereignisse sind die von einem Erdbeben in Unterwalden (MW ~ 6.2) ausgelöste subaqua- tische

  18. INTRODUCTION Karl von Frisch (von Frisch, 1946) discovered that a highly

    E-print Network

    Menzel, Randolf - Institut für Biologie

    1635 INTRODUCTION Karl von Frisch (von Frisch, 1946) discovered that a highly stereotyped, still of this pattern, which conveys information about targets located fairly far from the hive (von Frisch, 1967 that their ensuing behaviours may greatly depend upon the content of these signals (von Frisch, 1967). In the waggle

  19. Exponential Size Distribution of von Willebrand Factor

    PubMed Central

    Lippok, Svenja; Obser, Tobias; Müller, Jochen P.; Stierle, Valentin K.; Benoit, Martin; Budde, Ulrich; Schneppenheim, Reinhard; Rädler, Joachim O.

    2013-01-01

    Von Willebrand Factor (VWF) is a multimeric protein crucial for hemostasis. Under shear flow, it acts as a mechanosensor responding with a size-dependent globule-stretch transition to increasing shear rates. Here, we quantify for the first time, to our knowledge, the size distribution of recombinant VWF and VWF-eGFP using a multilateral approach that involves quantitative gel analysis, fluorescence correlation spectroscopy, and total internal reflection fluorescence microscopy. We find an exponentially decaying size distribution of multimers for recombinant VWF as well as for VWF derived from blood samples in accordance with the notion of a step-growth polymerization process during VWF biosynthesis. The distribution is solely described by the extent of polymerization, which was found to be reduced in the case of the pathologically relevant mutant VWF-IIC. The VWF-specific protease ADAMTS13 systematically shifts the VWF size distribution toward smaller sizes. This dynamic evolution is monitored using fluorescence correlation spectroscopy and compared to a computer simulation of a random cleavage process relating ADAMTS13 concentration to the degree of VWF breakdown. Quantitative assessment of VWF size distribution in terms of an exponential might prove to be useful both as a valuable biophysical characterization and as a possible disease indicator for clinical applications. PMID:24010664

  20. GKSS 2005/1 H. von Storch

    E-print Network

    von Storch, Hans

    GKSS 2005/1 Authors: K. Woth R. Weisse H. von Storch ISSN0344-9629 GKSS ist Mitglied der Hermann von Helmholtz- Gemeinschaft Deutscher Forschungszentren e.V. Dynamical modelling of North Sea storm-Forschungszentrum Geesthacht GmbH · Geesthacht · 2005 Authors: K. Woth R. Weisse H. von Storch (Institute for Coastal Research

  1. Heft 127 Oliver Witt Erosionsstabilitt von

    E-print Network

    Cirpka, Olaf Arie

    Heft 127 Oliver Witt Erosionsstabilität von Gewässersedimenten und deren Bedeutung für den Erlangung der Würde eines Doktor-Ingenieurs (Dr.-Ing.) genehmigte Abhandlung Vorgelegt von Oliver Witt aus ausgewählter Stauhaltungen des Oberrheins von Dr.-Ing. Oliver Witt Eigenverlag des Instituts für Wasserbau der

  2. How Is von Willebrand Disease Diagnosed?

    MedlinePLUS

    ... from the NHLBI on Twitter. How Is von Willebrand Disease Diagnosed? Early diagnosis of von Willebrand disease (VWD) is important to make sure that ... diagnose the disorder. These tests may include: Von Willebrand factor antigen. This test measures the amount of ...

  3. Von Hippel-Lindau Disease (VHL)

    MedlinePLUS

    NINDS Von Hippel-Lindau Disease (VHL) Information Page Synonym(s): Angiomatosis Table of Contents (click to jump to sections) What ... is being done? Clinical Trials Organizations What is Von Hippel-Lindau Disease (VHL)? von Hippel-Lindau disease ( ...

  4. Isabel Krebs Erzeugung und Analyse von

    E-print Network

    Weinfurter, Harald

    Isabel Krebs Erzeugung und Analyse von Hyperentanglement mit einem Michelson-Interferometer Bachelorarbeit #12;#12;Bachelorarbeit Erzeugung und Analyse von Hyperentanglement mit einem Michelson-Interferometer An der Fakultät für Physik der Ludwig-Maximilians-Universität München Vorgelegt am 10. Mai 2010 von

  5. Fachbereich Physik Seite 1 von 22

    E-print Network

    Osnabrück, Universität

    Fachbereich Physik Titelseite Seite 1 von 22 Zur¨uck Vollbild Schließen Beenden 14. Oktober 2003, these parameters will not always be physics. 1KLAUS.BETZLER@UOS.DE #12;Fachbereich Physik Titelseite Seite 2 von 22;Fachbereich Physik Titelseite Seite 3 von 22 Zur¨uck Vollbild Schließen Beenden 14. Oktober 2003 Klaus Betzler

  6. Spindephasierung und kohrente Kontrolle eines Ensembles von

    E-print Network

    Anders, Frithjof

    Spindephasierung und kohärente Kontrolle eines Ensembles von Quantenpunkten Spindephasing and coherent control of an ensemble of quantum dots Master-Thesis von Andre Jovchev April 2012 Institut für Festkörperphysik AG Grewe #12;Spindephasierung und kohärente Kontrolle eines Ensembles von Quantenpunkten

  7. Computersimulation von Plasmen -Skriptum zur Vorlesung -

    E-print Network

    Kull, Hans-Jörg

    Computersimulation von Plasmen - Skriptum zur Vorlesung - Prof. Dr. H.-J. Kull Fraunhofer Institut A Rheinisch-Westf¨alische Technische Hochschule Aachen 20. November 2003 #12;Computersimulation von Plasmen Vorlesung, Computersimulation von Plasmen, im Wintersemester 00/01. Es soll kein Lehrbuch ersetzen. Das

  8. Hans-Martin von Gaudecker Universitt Bonn

    E-print Network

    Franz, Sven Oliver

    Hans-Martin von Gaudecker Universität Bonn Department of Economics Adenauerallee 24-42 53113 Bonn Católica de Chile, Universität Heidelberg. Publications [1] Hans-Martin von Gaudecker. "How Does Household 70.2 (Apr. 2015), pp. 489­507. [2] Hans-Martin von Gaudecker, Arthur van Soest, and Erik Wengström

  9. Komplement#rpaare linearer Erweiterungen von Ordnungen

    E-print Network

    Felsner, Stefan

    Komplement#rpaare linearer Erweiterungen von Ordnungen Carsten Ihlemann 11. Juni 1999 Zusammenfassung Der Abstand zwischen zwei linearen Erweiterungen einer (Halb­)Ordnung ist die Anzahl der Paare von Elementen, die in den beiden Erweiterungen unterschiedlich geordnet sind. Ein Paar L; M von linearen

  10. Fachbereich Physik Seite 1 von 11

    E-print Network

    Osnabrück, Universität

    Fachbereich Physik Titelseite Seite 1 von 11 Zur¨uck Vollbild Schließen Beenden 11. Januar 2004 an = 0 . (3) 1KLAUS.BETZLER@UOS.DE #12;Fachbereich Physik Titelseite Seite 2 von 11 Zur¨uck Vollbild Titelseite Seite 3 von 11 Zur¨uck Vollbild Schließen Beenden 11. Januar 2004 Klaus Betzler Y = polyval

  11. Von der Quantenmechanik zum Materialdesign

    NASA Astrophysics Data System (ADS)

    Eyert, Volker; Eckern, Ulrich

    2000-11-01

    Die enormen Fortschritte der theoretischen Festkörperphysik im 20. Jahrhundert sind eng verknüpft mit der Entdeckung der Quantenmechanik und der Entwicklung von schnellen Verfahren zur Berechnung der elektronischen Struktur kondensierter Materie. Letztere bilden heute die Basis sowohl für ein vertieftes Verständnis grundlegender physikalischer Fragestellungen als auch die Herstellung neuer Materialien mit maßgeschneiderten Eigenschaften.

  12. GEOMETRIE UND KOMBINATORIK VON NASHGLEICHGEWICHTEN

    E-print Network

    Theobald, Thorsten

    wurden Nashs BeitrË? age wie folgt gewË? urdigt (siehe auch [7]). '' John F. Nash introducedGEOMETRIE UND KOMBINATORIK VON NASH­GLEICHGEWICHTEN THORSTEN THEOBALD Institut fË? ur Mathematik, MA Spieltheorie aus den 50er Jahren wurde John Nash (gemeinsam mit John Harsanyi und Reinhard Selten) im Jahr 1994

  13. [Von Willebrand and his factor].

    PubMed

    van Gijn, Jan; Gijselhart, Joost P

    2011-01-01

    Erik Adolf von Willebrand (1870-1949) studied medicine in Helsinki, where he subsequently joined the staff at the Deaconess Hospital. Haematological disorders were his main interest. In 1924 he was consulted about 5-year-old Hjördis S. She suffered from a severe bleeding disorder, as did six of her ten siblings; three of her sisters had died. In a Finnish article in a Journal in 1926 (in the Swedish language) he plotted the family pedigree (bleeding disorder in three preceding generations, on the part of both parents). Von Willebrand also distinguished the disorder from haemophilia and thrombopathies with purpura. His conjecture that the disorder was a special form of thrombocyte dysfunction would eventually be borne out, though the key factor is severe deficiency of a specific plasma protein. In milder, autosomal dominant forms of the disease, the protein is partly deficient or abnormal. PMID:21329541

  14. On Quantitizing

    ERIC Educational Resources Information Center

    Sandelowski, Margarete; Voils, Corrine I.; Knafl, George

    2009-01-01

    "Quantitizing", commonly understood to refer to the numerical translation, transformation, or conversion of qualitative data, has become a staple of mixed methods research. Typically glossed are the foundational assumptions, judgments, and compromises involved in converting disparate data sets into each other and whether such conversions advance…

  15. Modellierung von Anwenderverhalten im Social Semantic Web

    NASA Astrophysics Data System (ADS)

    Ulbrich, Armin; Höfler, Patrick; Lindstaedt, Stefanie

    Ziel dieses Kapitels ist es, gemeinsame Verwendungsszenarien des Semantic Web und des Social Web zu identifizieren und zu benennen. Dabei wird ein Teilaspekt des Themengebiets im Detail betrachtet: die Nutzung von Services, die Beobachtungen des Verhaltens von Anwendern analysieren, um daraus maschinell interpretierbare Informationen zu erhalten und diese als Modelle zu organisieren. Es werden zunächst einige Eigenschaften und Unterscheidungsmerkmale von Anwenderverhalten und organisierten Modellen dargestellt. Anschließend wird der mögliche wechselseitige Nutzen von Anwenderverhalten und Modellen diskutiert. Den Abschluss bildet eine Betrachtung einiger exemplarischer Software-Services, die heute schon verwendet werden, um Anwenderverhalten in Modelle überzuführen.

  16. Quantitative radiography

    SciTech Connect

    Logan, C.M.; Hernandez, J.M.; Devine, G.J.

    1991-02-01

    We have developed a system of quantitative radiography in order to produce quantitative images displaying homogeneity of parts. The materials that we characterize are synthetic composites and may contain important subtle density variations not discernable by examining a raw film x-radiograph. In order to quantitatively interpret film radiographs, it is necessary to digitize, interpret, and display the images. Our integrated system of quantitative radiography displays accurate, high-resolution pseudocolor images in units of density. We characterize approximately 10,000 parts per year in hundreds of different configurations and compositions with this system. Images are captured using DuPont NDT55 industrial x-ray film in Daypack{trademark} packages. X-ray cabinets are of custom design, with helium flight path and a filter wheel for positioning filters if desired. The cabinets contain baffles to reduce scattered radiation and are equipped with drawer for rapid load/unload of parts. Separate units with tungsten-anode or copper-anode tubes are available. The usual operating voltage is 15 to 35 kVp. Fixturing provides for rough part positioning and precise alignment with respect to the x-ray source. Areal density standards are placed at several locations on each film. In interpreting the image, we use the standards nearest the image of the part being quantified. Because of this, small variations in x-ray flux uniformity (heel effects) are unimportant. The usual standard is a step wedge of aluminum containing 13 steps. Films are permanently labeled by imaging a perforated metal numbering strip. Data such as part number, step wedge identification, etc. are read from barcode labels and transferred to a data base for later retrieval and use in quantifying the image.

  17. Otto-von-Guericke-Universitt Magdeburg Fakultt fr Informatik

    E-print Network

    Otto-von-Guericke-Universität Magdeburg Fakultät für Informatik Institut für Verteilte Systeme ein verteiltes, DSP-basiertes Steuerungssystem eines Rasterkraftmikroskops März 2004 vorgelegt von Kurzfassung Mit Hilfe der Rastersondenmikroskopie ist es möglich, einen kleinen Ausschnitt der Oberfläche von

  18. Einfhrung Modell Simulation Vergleich ZF Elektronengleichgewichte von Atomclustern

    E-print Network

    Kull, Hans-Jörg

    Einführung Modell Simulation Vergleich ZF Elektronengleichgewichte von Atomclustern in starken Laserfeldern Diplomarbeit von Bernd Stahl Institut für Theoretische Physik A, RWTH Aachen Institutsseminar 28.06.2006 Bernd Stahl Elektronengleichgewichte von Atomclustern #12;Einführung Modell Simulation Vergleich ZF

  19. Akademisches Auslandsamt / International Office Partnerschaftsstipendien fr Austauschstudierende von Partnerhochschulen

    E-print Network

    Steinhoff, Heinz-Jürgen

    von Partnerhochschulen Partnership scholarships for exchange students from partner universities Für Partnerschaftsstipendien an ausländische Austauschstudierende von Partnerhochschulen. The International Office of Osnabrück eine Partnerhochschule der Universität Osnabrück ist und die von ihrer Heimathochschule für einen

  20. Reflexionseigenschaften von Windenergieanlagen im Funkfeld von Funknavigations- und Radarsystemen

    NASA Astrophysics Data System (ADS)

    Sandmann, S.; Divanbeigi, S.; Garbe, H.

    2015-11-01

    Die hier behandelte Untersuchung befasst sich mit den Störungen des elektrischen Feldes einer Doppler Very High Frequency Omnidirectional Radio Range Navigationsanlage (DVOR) in der Gegenwart von Windenergieanlagen (WEA). Hierfür wird die Feldstärke auf 25 konzentrischen Kreisbahnen, sog. Orbit Flights verschiedener Höhen und mit verschiedenen Radien rund um die DVOR-Anlage numerisch simuliert. Insbesondere werden die Einflüsse diverser Parameter der WEA wie deren Anzahl, Position, Rotorwinkel, Turmhöhe und Rotordurchmesser auf die Feldverteilung herausgestellt, sowie die Anwendbarkeit der Simulationsmethode Physical Optics (PO) durch Vergleich der Simulationsergebnisse mit denen der Multi Level Fast Multipol Method (MLFMM) untersucht.

  1. Kriterien fr die Angemessenheit von fremdfinanzierten Reisen Als generell genehmigt gilt die Annahme von Zuwendungen in Form des Erlasses von Ta-

    E-print Network

    Wolkenhauer, Olaf

    Kriterien für die Angemessenheit von fremdfinanzierten Reisen Als generell genehmigt gilt die Annahme von Zuwendungen in Form des Erlasses von Ta- gungsgebühren zu wissenschaftlichen Veranstaltungen �bernahme von Reisekosten durch Dritte, die über den Ma�stäben des Landesreise- kostenrechts liegen, sind

  2. Von Karman Vortices over Broutona

    NASA Technical Reports Server (NTRS)

    2002-01-01

    These Von Karman vortices formed over the islands of Broutona, Chirpoy, and Brat Chirpoyev ('Chirpoy's Brother'), all part of the Kuril Islands chain between Russia's Kamchatka Peninsula and Japan. This image was acquired by the Landsat 7 Enhanced Thematic Mapper plus (ETM+) sensor on May 6, 2000. This is a false-color composite image made using infrared, near-infrared, and red wavelengths. The image has also been sharpened using the sensor's panchromatic band. Image provided by the USGS EROS Data Center Satellite Systems Branch

  3. Dr. von Braun Tries Out the NBS

    NASA Technical Reports Server (NTRS)

    1967-01-01

    Marshall Space Flight Center (MSFC) Director, Dr. von Braun, is shown fitted with suit and diving equipment as he prepares for a tryout in the MSFC Neutral Buoyancy Simulator (NBS). Weighted to a neutrally buoyant condition, Dr. von Braun was able to perform tasks underwater which simulated weightless conditions found in space.

  4. FUNKTOREN AUF KATEGORIEN VON BANACHR.AUMEN

    E-print Network

    Michor, Peter W.

    besitzen. 1m 3. Kapitel wird gezeigt, dann in ~1 jeder Banachraum induktiver Limes vomUrlicher Transformationen als induktiver bzw. projektiver Limes in ~1 dargestellt und damit dann verschiedene induktiver Limes in li1 36 von endlich-dimensionalen Baumen. IV. Dualit~t von Funktoren. 43 (IV.1

  5. Normalizers of Finite von Neumann Algebras 

    E-print Network

    Cameron, Jan Michael

    2010-10-12

    For an inclusion N \\subseteq M of finite von Neumann algebras, we study the group of normalizers N_M(B) = {u: uBu^* = B} and the von Neumann algebra it generates. In the first part of the dissertation, we focus on the ...

  6. Walt Disney and Dr. Wernher von Braun

    NASA Technical Reports Server (NTRS)

    1954-01-01

    Dr. Werhner von Braun, then Chief, Guided Missile Development Operation Division at Army Ballistic Missile Agency (ABMA) in Redstone Arsenal, Alabama, was visited by Walt Disney in 1954. In the 1950's, von Braun worked with Disney Studio as a technical director, making three films about space exploration for television. A model of the V-2 rocket is in background.

  7. Infinite Measures on von Neumann Algebras

    NASA Astrophysics Data System (ADS)

    Goldstein, Stanis?aw; Paszkiewicz, Adam

    2015-12-01

    Infinite measures on von Neumann algebras are classified according to properties analogous to those from classical measure theory. These properties are carefully examined in case of semifinite von Neumann algebras. Some examples are also given and the direction for further research indicated.

  8. Ludwig von Mises: An Annotated Bibliography.

    ERIC Educational Resources Information Center

    Gordon, David

    A 117-item annotated bibliography of books, articles, essays, lectures, and reviews by economist Ludwig von Mises is presented. The bibliography is arranged chronologicaly, and is followed by an alphabetical listing of the citations, excluding books. An index and information on the Ludwig von Mises Institute at Auburn University (Alabama) are…

  9. Dr. Wernher Von Braun at a picnic.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun, director of the Marshall Space Flight Center, stakes claim to a table for the picnic celebrating man's first lunar landing. With Dr. Von Braun are his wife, Maria (seated, right), and son, Peter (back to camera). His daughter, Margrit, was also present, but is hidden from view by friends in this view.

  10. Dr. Wernher Von Braun greeting dignitaries.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun, left, greets vice president Spiro T. Agnew in the Launch Control Center for the Apollo 14 mission. Between Dr. Von Braun and Mr. Agnew are their Royal Highnesses, The Prince and Princess of Spain. The royal visitors greeted the launch control team in th enter after the launch of Apollo 14.

  11. Filament-Based Smoke vorgelegt von

    E-print Network

    Weissmann, Steffen

    Filament-Based Smoke vorgelegt von Diplom-Mathematiker Steffen Weißmann Neuburg an der Donau Von filaments. Based on a Hamiltonian system for the dynamics of smooth vortex filaments, we develop to use coarse polygonal vortex filaments, while preserving the qualitative behavior of the smooth system

  12. Briefe aus England an seine Frau 1864 Helmholtz, Hermann von

    E-print Network

    Gertz, Michael

    Briefe aus England an seine Frau 1864 Helmholtz, Hermann von URL: http;Universitätsbibliothek Heidelberg Hermann Helmholtz Briefe aus England an seine Frau 1864 S. 113 - 123 aus Anna von Helmholtz : ein Lebensbild in Briefen / hrsg. von Ellen von Siemens-Helmholtz. - Berlin Band 1. 1929 http

  13. Otto von Guericke Universitat Magdeburg Fakultat fur Informatik

    E-print Network

    Apel, Sven

    Otto von Guericke Universit¨at Magdeburg Fakult¨at f¨ur Informatik Masterarbeit Forensisch sicheres sicheres L¨oschen in relationalen Datenbankmanagementsystemen Masterarbeit, Otto von Guericke Universit 3 2.1 L¨oschen und Anonymisieren von personenbezogenen Daten . . . . . . . 3 2.2 Architekturen von

  14. Anregung von Atomen durch Laserpulse mit wenigen Zyklen

    E-print Network

    Kull, Hans-Jörg

    Anregung von Atomen durch Laserpulse mit wenigen Zyklen von Torsten Ristow Diplomarbeit in Physik Laserpulse mit wenigen Schwingungszyklen 11 ¨3 Anregung von elektronischen Uberg¨ angen in Atomen 15 3 zyklen der Tr¨ aßig werden heute Pulsdauern unteragerwelle bestehen [1]. Standardm¨ halb von 10 fs bei

  15. Validierung von UML-Modellen und OCL-Bedingungen

    E-print Network

    Gogolla, Martin - Fachbereich 3

    Validierung von UML-Modellen und OCL-Bedingungen Mark Richters and Martin Gogolla Universität ein allgemein akzeptierter Standard für die Modellierung von Software- Systemen und wird als solcher von einer groÿen Anzahl von CASE-Tools unterstützt. Oft weisen UML-Werkzeuge nur wenig Unterstützung

  16. Leitfaden zur Dokumentation von Studiengngen im Rahmen der Reakkreditierung von Bachelor-und Masterstudiengngen an der Johannes Gutenberg-Universitt Mainz

    E-print Network

    Kaus, Boris

    Leitfaden zur Dokumentation von Studiengängen im Rahmen der Reakkreditierung von Bachelor- und Prozess der Systemakkreditierung. Vor diesem Hintergrund ist die Reakkreditierung von Studiengängen als Reakkreditie- rung die Voraussetzung für die Weiterführung von Bachelor- und Masterprogrammen. An der JGU ist

  17. [Von Hippel-Lindau syndrome].

    PubMed

    Reich, H; Hollwich, F

    1984-06-01

    The von Hippel-Lindau syndrome is an autosomal dominant condition that comprises, apart from angiomas of the retina, the cerebellum, the spinal cord, and the cerebrum, also cystic and blastomatous dysplasias resulting from maldevelopment, namely cystic kidney and pancreas, hypernephroma, and pheochromocytoma. Early observers of the syndrome were the English neurologist John Hughlings Jackson (1872) and the German ophthalmologist Hugo Magnus (1874). The typical association of angiomas of the retina with the cerebellum was first described in 1905 by the Prague ophthalmologist Wilhelm Czermak, long before Lindau (1926). The fact that hypernephromas and pheochromocytomas may form parts of it characterizes the syndrome as a polyneoplastic hereditary disease and the sufferers as members of families at risk. Since the ophthalmologist is often the first to recognize this disease by direct inspection of the fundi, he is responsible for ensuring proper medical care for the affected person and his or her entire family. PMID:6384634

  18. Surgery in von Willebrand's disease.

    PubMed Central

    Nilsson, I M; Bergentz, S E; Larsson, S A

    1979-01-01

    Fifty-eight major surgical procedures were performed in 38 patients with von Willebrand's disease (VWD), one of the most common of the inheritable hemorrhagic disorders. Specific treatment with fraction I-0, (AHF-Kabi) in addition to a fibrinolytic inhibitor, was given to all patients. The effect of the treatment was checked by measuring the Duke bleeding time and factor VIII:C level. A marked difference between hemophilia and VWD from a surgical point of view is demonstrated. While most of the surgery in hemophiliacs is performed for severe joint deformities, contractures and blood cysts, surgery in VWD is mostly general surgery, often necessitated by massive hemorrhages from mucous membranes. PMID:316311

  19. Nachrufe auf Hermann von Helmholtz und Helmholtz' Tischrede gehalten bei der Feier des 70. Geburtstages

    E-print Network

    Gertz, Michael

    Nachrufe auf Hermann von Helmholtz und Helmholtz' Tischrede gehalten bei der Feier des 70 and Bezold, Wilhelm von and Waag, Albert and Helmholtz, Anna von and Helmholtz, Hermann von Hermann von Helmholtz von Wilhelm von Bezold, Emil du Bois-Reymond, Theodor W. Engelmann, William Thomson

  20. Masterarbeit SPA-LEED Untersuchungen von

    E-print Network

    Osnabrück, Universität

    Masterarbeit SPA-LEED Untersuchungen von Dy-induzierten Nanostrukturen auf Si-Oberfl¨achen Autor.1.4 Epitaktisches Wachstum . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 LEED-Kammer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.2 SPA-LEED-Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4

  1. EIN SYSTEM ZUR TRANSFORMATION VON KONSISTENZ-

    E-print Network

    Habel, Annegret

    Coconut zur Automatisierung dieser Transformationen. Über eine Erweiterung der Skriptsprache Ant können;INHALTSVERZEICHNIS iii 5 Coconut: Ein System zur Transformation von Bedingungen 26 5.1 Anforderungen Literaturverzeichnis 72 A Transformationen mit Coconut 76 A.1 Mobilfunknetze

  2. Fast Track Kinderchirurgie -von der Qualittsverbesserung zur

    E-print Network

    Manstein, Dietmar J.

    Fast Track Kinderchirurgie - von der Qualitätsverbesserung zur integrierten Versorgung - Benno Ure Multimodales Konzept / Chirurgie entlang eines Pfades Hendrik Kehlet 1991 Kopenhagen, Dänemark Fast Track Chirurgie #12;Multimodales Konzept Fast Track Chirurgie Chirurgie Anästhesie Schmerztherapie Pflege andere

  3. Genetics Home Reference: Von Willebrand disease

    MedlinePLUS

    ... mildest and most common of the three types, accounting for 75 percent of affected individuals. Type 3 ... Where can I find information about diagnosis or management of von Willebrand disease? These resources address the ...

  4. Herstellung von Chitosan und einige Anwendungen

    NASA Astrophysics Data System (ADS)

    Struszczyk, Marcin Henryk

    2001-05-01

    1. Die Deacetylierung von crabshell - Chitosan führte gleichzeitig zu einem drastischen Abfall der mittleren viscosimetrischen Molmasse ( Mv), insbesondere wenn die Temperatur und die Konzentration an NaOH erhöht werden. Diese Parameter beeinflussten jedoch nicht den Grad der Deacetylierung (DD). Wichtig ist jedoch die Quelle des Ausgangsmaterials: Chitin aus Pandalus borealis ist ein guter Rohstoff für die Herstellung von Chitosan mit niedrigem DD und gleichzeitig hoher mittlerer Mv, während Krill-Chitin (Euphausia superba) ein gutes Ausgangsmaterial zur Herstellung von Chitosan mit hohem DD und niedrigem Mv ist. Chitosan, das aus Insekten (Calliphora erythrocephala), unter milden Bedingungen (Temperatur: 100°C, NaOH-Konzentration: 40 %, Zeit: 1-2h ) hergestellt wurde, hatte die gleichen Eigenschaften hinsichtlich DD und Mv wie das aus Krill hergestellte Chitosan. Der Bedarf an Zeit, Energie und NaOH ist für die Herstellung von Insekten-Chitosan geringer als für crabshell-Chitosan vergleichbare Resultaten für DD und Mv. 2. Chitosan wurde durch den Schimmelpilz Aspergillus fumigatus zu Chitooligomeren fermentiert. Die Ausbeute beträgt 25%. Die Chitooligomere wurden mit Hilfe von HPLC und MALDI-TOF-Massenspektrmetrie identifiziert. Die Fermentationsmischung fördert die Immunität von Pflanzen gegen Bakterien und Virusinfektion. Die Zunahme der Immunität schwankt jedoch je nach System Pflanze-Pathogen. Die Fermentation von Chitosan durch Aspergillus fumigatus könnte eine schnelle und billige Methode zur Herstellung von Chitooligomeren mit guter Reinheit und Ausbeute sein. Eine partiell aufgereinigte Fermentationsmischung dieser Art könnte in der Landwirtschaft als Pathogeninhibitor genutzt werden. Durch kontrollierte Fermentation, die Chitooligomere in definierter Zusammensetzung (d.h. definierter Verteilung des Depolymerisationsgrades) liefert, könnte man zu Mischungen kommen, die für die jeweilige Anwendung eine optimale Bioaktivität besitzen. 3. Die aus Chitosan-Dispersionen hergestellten MCChB-Filme weisen bessere mechanische Eigenschaften (Bruchfestigkeit, Dehnung) und eine höhere Wasseraufnahmefähigkeit auf als Filme, die nach herkömmlichen Methoden aus sauerer Lösung hergestellt werden. Die Einführung von Proteinen ändert die mechanischen Eigenschaften der MCChB-Filme abhängig von der Art, der Proteine sowie des DD und der Mv des eingesetzte Chitosan. Die Zugabe von Protein beschleunigt den biologischen Abbau der MCChB-Filme. Aus den untersuchten MCChB-Filmen mit Proteinzusatz können leichte, reißfeste und dennoch elastische Materialen hergestellt werden. 4. Mit Hilfe von MCChB-Dispersion kann Papier modifiziert werden. Dadurch werden die mechanischen Eigenschaften verbessert und die Wasseraufnahme wird verringert. Die Zugabe von Proteinen verringert das Wasseraufnahmevermögen noch weiter. Ein geringes Wasseraufnahmevermögen ist der bedeutendste Faktor bei der Papierherstellung. Auch Papier, das mit einem MCChB-Protein-Komplexe modifiziert wurde, zeigt gute mechanische Eigenschaften. 5. Wird Chitosan durch unmittelbare Einführung von MCChB auf Cellulose-Fasern aufgebracht, so erhält man eine netzartige Struktur, während durch Ausfällung aufgebrachtes Chitosan eine dünne Schicht auf den Cellulose-Fasern bildet. Die netzartige Struktur erleichtert die Bioabbaubarkeit, während die Schichtstruktur diese erschwert. 6. Die guten mechanischen Eigenschaften, die geringe Wasseraufnahmefähigkeit und die mit Cellulose vergleichbare Bioabbaubarkeit von Papier, das mit MCChB modifiziert wurde, lassen MCChB für die Veredlung von Papier nützlich erscheinen. 1. Deacetylation of the crustacean chitosan causes drastically decrease in the Mv with increasing reaction temperature and time as well as the concentration of sodium hydroxide. However, the DD are relatively less affected. Pandalus borealis is a good source for production of chitosan having high Mv and low DD, whereas chitosan of medium to low Mv can ideally be prepared using krill chitin. Insect chitosan is prepared under milder condition a

  5. PROFESSORINNEN IM PORTRAIT FOTOGRAFIEN VON JULIA BAIER

    E-print Network

    Diekmann, Martin

    PROFESSORINNEN IM PORTRAIT FOTOGRAFIEN VON JULIA BAIER HERAUSGEBERIN: UNIVERSITÄT BREMEN Brigitte Nagler Anneliese Niehoff PROFESSORINNEN IM PORTRAIT VIER FRAGEN AN... Prof. Dr. Sabine Broeck Prof einen Katalog zur Ausstellung UNISPITZEN ­ Professorinnen im Portrait vor. Darin werden interessante

  6. PROFESSORINNEN IM PORTRAIT FOTOGRAFIEN VON JULIA BAIER

    E-print Network

    Diekmann, Martin

    PROFESSORINNEN IM PORTRAIT FOTOGRAFIEN VON JULIA BAIER HERAUSGEBERIN: UNIVERSITÄT BREMEN ­ Professorinnen im Portrait vor. Darin werden interessante Persönlich- keiten vorgestellt, die nicht nur. Dr. Wilfried Müller / Gerd-Rüdiger Kück Brigitte Nagler Anneliese Niehoff PROFESSORINNEN IM PORTRAIT

  7. Von Kármán between Aachen and Pasadena

    NASA Astrophysics Data System (ADS)

    Krause, Egon; Kalkmann, Ulrich

    2013-05-01

    In the Introduction the reader is referred back to the academic ceremonials held after Theodore von Kármán's death in Aachen in May 1963. His work as the first director of the Aerodynamisches Institut (Institute of Aerodynamics) of the RWTH Aachen University of Technology from 1913 on and his initiative to re-establish international cooperation after World War I, resulting in the International Union of Theoretical and Applied Mechanics (IUTAM), are commented on. The following chapter describes von Kármán's relation to his former teacher Ludwig Prandtl. Some of von Kármán's scientific contributions during his time in Aachen are briefly reviewed. Thereafter, his first contacts to the California Institute of Technology are covered. Finally, the scientific and political circumstances, which led to von Kármán's decision to leave Germany in the early thirties, are elucidated in some detail. The English translation of the titles of the Aachen papers is given in Appendix I.

  8. von Laue's Theorem and Its Applications

    E-print Network

    Changbiao Wang

    2015-03-24

    von Laue's theorem, as well as its generalized form, is strictly proved in detail for its sufficient and necessary condition (SNC). This SNC version of Laue's theorem is used to analyze the classical electron. It is shown in general that, the total (Abraham=Minkowski) EM momentum and energy for the electrostatic field confined in a finite region of space cannot constitute a Lorentz four-vector. A deriving von Laue's theorem, which provides a criterion for a Lorentz invariant, is also presented.

  9. Oblique shock interactions and the von Neumann paradox 1 Oblique shock interactions and the von

    E-print Network

    Canic, Suncica

    and S 2 satisfy Rankine­Hugoniot conditions across the shocks, so these are oblique--shock Riemann data. In sOblique shock interactions and the von Neumann paradox 1 Oblique shock interactions and the von: We present a new theoretical approach to studying weak shock re­ flection in regimes where shock

  10. Modul "Kombination von Spezifikationstechniken" Die Lehrveranstaltung bietet eine Einfuhrung in die Spezifikationssprachen Z fur

    E-print Network

    Damm, Werner

    Modul "Kombination von Spezifikationstechniken" Ziel Die Lehrveranstaltung bietet eine Einf, Fertigkeiten und Kompetenzen vermittelt: · Kenntnisse: Spezifikation von komplexen Daten und Operationen in Z, Typdefinitionen und Schemakalk¨ul von Z, Datenverfeinerung; Spezifikation von kommunizierenden Prozessen in CSP

  11. von Neumann-Landau equation for wave functions, wave-particle duality and collapses of wave functions

    E-print Network

    Zeqian Chen

    2007-09-29

    It is shown that von Neumann-Landau equation for wave functions can present a mathematical formalism of motion of quantum mechanics. The wave functions of von Neumann-Landau equation for a single particle are `bipartite', in which the associated Schr\\"{o}dinger's wave functions correspond to those `bipartite' wave functions of product forms. This formalism establishes a mathematical expression of wave-particle duality and that von Neumann's entropy is a quantitative measure of complementarity between wave-like and particle-like behaviors. Furthermore, this extension of Schr\\"{o}dinger's form suggests that collapses of Schr\\"{o}dinger's wave functions can be regarded as the simultaneous transition of the particle from many levels to one.

  12. Aufbau von Beschleunigern und Experimenten Abbildung 128: Einbau eines Beschleunigermoduls im TTF-Tunnel.

    E-print Network

    Aufbau von Beschleunigern und Experimenten Abbildung 128: Einbau eines Beschleunigermoduls im TTF-Tunnel. 262 #12;Aufbau von Beschleunigern und Experimenten Aufbau von Beschleunigern und Experimenten Von der. Beschleuniger HERA Die vorbereitenden Arbeiten für die Luminositätser- höhung von HERA und den Einbau von

  13. Otto-von-Guericke-Universitt Magdeburg School of Computer Science

    E-print Network

    Apel, Sven

    Otto-von-Guericke-Universität Magdeburg School of Computer Science Department of Technical Diplomarbeit, Otto-von-Guericke-Universität Magdeburg, 2007. #12;CONTENTS I Contents Contents i List of Figures

  14. Otto-von-Guericke-Universitat Magdeburg Fakultat fur Informatik

    E-print Network

    Otto-von-Guericke-Universit¨at Magdeburg Fakult¨at f¨ur Informatik Institut f¨ur verteilte Systeme Diplomarbeit Vergleich von Routingmetriken in drahtlosen Maschennetzwerken Jens Wien¨obst 5. Oktober 2007

  15. Physik-Department Mechanische Anisotropie von Proteinen in

    E-print Network

    Dietz, Hendrik

    ¨un Fluoreszierende Protein (GFP) . . . . . . . . . . . . . . . . . . . 5 1.4 Kraft-Ausdehnungsantwort von GFP.4 Intramolekulare Abst¨ande im GFP . . . . . . . . . . . . . . . . . . . . . . 15 2.5 Mechanische Triangulation Minima in der GFP Energielandschaft 31 4.1 Population von partiell gefalteten Strukturen

  16. The Amalgamated Free Product of Hyperfinite von Neumann Algebras 

    E-print Network

    Redelmeier, Daniel

    2012-07-16

    We examine the amalgamated free product of hyperfinite von Neumann algebras. First we describe the amalgamated free product of hyperfinite von Neumann algebras over finite dimensional subalgebras. In this case the result is always the direct sum...

  17. Dr. Wernher Von Braun with Dr. Christian Barnard.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Christian Barnard Tours Marshall Space Flight Center. Shown in Dr. Von Braun's office are (left to right): Dr. Ernst Sthulinger, a representative from General Electric, Dr. Wernher Von Braun, Dr. Christian Barnard, and Dr. Eberhard Rees.

  18. Treatment of the acquired von Willebrand syndrome.

    PubMed

    Budde, Ulrich; Scheppenheim, Sonja; Dittmer, Rita

    2015-12-01

    Acquired von Willebrand syndrome (aVWS) accounts for 22% of patients with abnormal von Willebrand factor. Most patients with known pathophysiological mechanisms suffer from cardiovascular, myeloproliferative and lymphoproliferative disorders. Less frequent associations are of autoimmune origin, due to hyperfibrinolysis, adsorption to tumor cells, reduced synthesis and prolonged circulation. The mechanisms leading to aVWS is hitherto not known in patients with liver and kidney diseases, drug use, glycogen storage disease, virus infections and at least 18 other disease entities. Diagnosis is complicated by the battery of tests needed, and their inherent rather low sensitivity and specificity for aVWS. Thus, even in acute bleeding situations it may take days until a firm diagnosis is settled and specific therapies can be initiated. The main aim is to shed more light onto this, compared with inherited von Willebrand disease, rare disease which affects at least 2-3% of the older population. PMID:26577336

  19. von Braun 1952 Space Station Concept

    NASA Technical Reports Server (NTRS)

    1952-01-01

    This is a von Braun 1952 space station concept. In a 1952 series of articles written in Collier's, Dr. Wernher von Braun, then Technical Director of the Army Ordnance Guided Missiles Development Group at Redstone Arsenal, wrote of a large wheel-like space station in a 1,075-mile orbit. This station, made of flexible nylon, would be carried into space by a fully reusable three-stage launch vehicle. Once in space, the station's collapsible nylon body would be inflated much like an automobile tire. The 250-foot-wide wheel would rotate to provide artificial gravity, an important consideration at the time because little was known about the effects of prolonged zero-gravity on humans. Von Braun's wheel was slated for a number of important missions: a way station for space exploration, a meteorological observatory and a navigation aid. This concept was illustrated by artist Chesley Bonestell.

  20. Current controversies in the diagnosis and management of von Willebrand disease

    PubMed Central

    2015-01-01

    Von Willebrand disease (VWD) is the most common inherited bleeding disorder in the world. The spectrum of VWD spans quantitative and qualitative deficiencies of von Willebrand factor (VWF), a platelet adhesive protein. It manifests primarily as mucocutaneous bleeding, but severely affected patients may suffer soft tissue bleeding and hemarthroses. There is disagreement in the multiple guidelines published regarding diagnosis, especially of type 1 VWD, which also remains the most opaque with respect to molecular characterization. Treatment with desmopressin (DDAVP) is most effective in type 1 VWD, but regimens are not standardized. It is not clear which type 2 VWD patients with qualitative deficiencies can be treated with DDAVP and which ones should receive VWF concentrates. No guidelines stipulate which patients might benefit from prophylactic VWF infusions and how they should be dosed. These are some current controversies in VWD that are discussed in this review. PMID:26288715

  1. Otto-von-Guericke-Universitt Magdeburg Arbeitsgruppe Echtzeitsysteme und Kommunikation

    E-print Network

    Otto-von-Guericke-Universität Magdeburg Arbeitsgruppe Echtzeitsysteme und Kommunikation Technische ist die Hamming-Distanz definiert? b) Berechnen Sie die Hamming-Distanz von Code-Wörtern anhand von-Bit-Fehlerkorrektur sinnvoll, die Codewortlänge möglichst lang zu wählen? Wie hängt konkret die Länge von der Anzahl der

  2. Mittelwert- und Arbeitstaktsynchrone Simulation von Dieselmotoren

    NASA Astrophysics Data System (ADS)

    Zahn, Sebastian

    Getrieben durch die immer restriktiveren Anforderungen an das Emissions- und Verbrauchsverhalten moderner Verbrennungsmotoren steigt die Komplexität von Motormanagementsystemen mit jeder Modellgeneration an. Damit geht nicht nur eine Zunahme des Softwareumfangs von Steuergeräten sondern zugleich ein deutlicher Anstieg des Applikations-, Vermessungs- und Testaufwandes einher. Zur Effizienzsteigerung des Software- und Funktionsentwicklungsprozesses haben sich daher in der Automobilindustrie sowie in Forschungsinstituten verschiedene modell- und simulationsbasierte Methoden wie die Model-in-the-Loop (MiL) Simulation, die Software-in-the-Loop (SiL) Simulation, das Rapid Control Prototyping (RCP) sowie die Hardware-in-the-Loop (HiL) Simulation etabliert.

  3. 2 2 Die unipotenten Charaktere von F4 (q )

    E-print Network

    Malle, Gunter

    2 2 Die unipotenten Charaktere von F4 (q ausgezeichnete Menge von i* *rreduz- iblen komplexen Charakteren, die von Lusztig eingef"uhrten unipotenten komplexen Charaktere l"asst sich die Charaktertafel einer jeden endlichen Grupp* *e G vom Lie-Typ im

  4. Seite 1 von 4 Postfach 10 10 62 -80084 Mnchen

    E-print Network

    Waldmann, Uwe

    -Gesellschaft, - Hermann von Helmholtz-Gemeinschaft deutscher Forschungszentren, - Max-Planck-Gesellschaft, - DeutscheSeite 1 von 4 Postfach 10 10 62 - 80084 München Telefon: 089 2108-0 Fax: 089 2108-1111 Internet Forschungspreis der Alexander von Humboldt-Stiftung und der Max-Planck-Gesellschaft Nominierungsfrist: 15. Januar

  5. Otto-von-Guericke-University Magdeburg School of Computer Science

    E-print Network

    Kaestner, Christian

    Otto-von-Guericke-University Magdeburg School of Computer Science Department of Technical: Stefan Kegel March 21, 2009 Supervisor: Prof. Dr. rer. nat. habil. Gunter Saake Otto-von-Guericke: Streamed verification of a data stream management benchmark Thesis, Otto-von-Guericke-University Magdeburg

  6. Otto-von-Guericke-Universitt Magdeburg Fakultt fr Informatik

    E-print Network

    Otto-von-Guericke-Universität Magdeburg Fakultät für Informatik Institut für Verteilte Systeme-Netzwerken Diplomarbeit, Otto-von-Guericke-Universität Magdeburg, 2008. #12;Danksagung Ich möchte diese Gelegenheit nutzen unterstützt haben. III #12;IV #12;Kurzfassung Diese Arbeit beschäftigt sich mit der Entwicklung von Verfahren

  7. Otto-von-Guericke-Universitat Magdeburg Fakultat fur Informatik

    E-print Network

    Apel, Sven

    Otto-von-Guericke-Universit¨at Magdeburg Fakult¨at f¨ur Informatik Institut f¨ur Technische und Germany #12;Rosenm¨uller, Marko: Merkmalsorientierte Programmierung in C++ Diplomarbeit Otto-von-Guericke ­ FOP) ist ein Paradigma der Softwareentwicklung, welches das Erstellen von Software durch das

  8. Otto-von-Guericke Universitat Magdeburg Fakultat fur Informatik

    E-print Network

    Kaestner, Christian

    Otto-von-Guericke Universit¨at Magdeburg Fakult¨at f¨ur Informatik Master´s Thesis Entwicklung Master´s Thesis, Otto-von-Guericke Universit¨at Magdeburg, 2010. #12;Danksagung An dieser Stelle m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 3.2.2 FeatureHouse . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 3.3 Abbildung von

  9. Otto-von-Guericke-Universitat Magdeburg Fakultat fur Informatik

    E-print Network

    Otto-von-Guericke-Universit¨at Magdeburg Fakult¨at f¨ur Informatik Institut f¨ur Verteilte Systeme-Hoc-Netzen Diplomarbeit, Otto-von-Guericke-Universit¨at Magdeburg, 2005. #12;Danksagung W¨ahrend der Entstehung dieser, von ihnen zu lernen, mit ihnen vieles zu unternehmen und dass mein Studium hier lehrreich, spannend

  10. Otto-von-Guericke University Magdeburg School of Computer Science

    E-print Network

    Kaestner, Christian

    Otto-von-Guericke University Magdeburg School of Computer Science Department of Technical. Dr. rer. nat. habil. Gunter Saake, Dipl.-Wirtsch.-Inf. Thomas Leich Otto-von-Guericke University Bachelor Thesis, Otto-von-Guericke University Magde- burg, 2009. #12;CONTENTS I Contents Contents i List

  11. Otto von Guericke University Magdeburg Faculty of Computer Science

    E-print Network

    Kaestner, Christian

    Otto von Guericke University Magdeburg Faculty of Computer Science Department of Technical Study Thesis, Otto von Guericke University Magdeburg, 2009. #12;I Acknowledgements I would like to thank, Dipl.-Wirtsch.-Inf. Thomas Leich, Dipl.-Wirt.-Inform. Christian K¨astner, Dr.-Ing. Sven Apel Otto von

  12. Otto-von-Guericke-Universitat Magdeburg Fakultat fur Informatik

    E-print Network

    Apel, Sven

    Otto-von-Guericke-Universit¨at Magdeburg Fakult¨at f¨ur Informatik Institut f¨ur Technische und Modularisierungstechniken und ihre Bedeutung f¨ur qualitativ hochwertige Software Diplomarbeit, Otto-von-Guericke 1 2 Grundlagen 3 2.1 Definition der Qualit¨at von Software . . . . . . . . . . . . . . . . . . . . 3

  13. Fakultt fr Informatik Otto-von-Guericke-Universitt Magdeburg

    E-print Network

    Kaestner, Christian

    Fakultät für Informatik Otto-von-Guericke-Universität Magdeburg Nr.: FIN-014-2009 Flexible Runtime Arbeitsgruppe Datenbanken #12;Fakultät für Informatik Otto-von-Guericke-Universität Magdeburg Nr.: FIN-014. Saake Arbeitsgruppe Datenbanken #12;Impressum (§ 5 TMG): Herausgeber: Otto-von-Guericke

  14. Otto-von-Guericke-University Magdeburg School of Computer Science

    E-print Network

    Kaestner, Christian

    Otto-von-Guericke-University Magdeburg School of Computer Science Department of Technical 20, 2008 Advisors: Prof. Dr. rer. nat. habil. Gunter Saake Otto-von-Guericke-University Magdeburg¨um, Thomas: Reasoning about Feature Model Edits Bachelor Thesis, Otto-von-Guericke-University Magdeburg, 2008

  15. Fakultt fr Informatik Otto-von-Guericke-Universitt Magdeburg

    E-print Network

    Apel, Sven

    Fakultät für Informatik Otto-von-Guericke-Universität Magdeburg Nr.: FIN-04-2012 Analysis Schaefer, Gunter Saake Arbeitsgruppe Datenbanken #12;Fakultät für Informatik Otto-von-Guericke (Internet) Elektronische Zeitschriftenreihe der Fakultät für Informatik der Otto-von-Guericke

  16. Otto-von-Guericke-Universitat Magdeburg Fakultat fur Informatik

    E-print Network

    Apel, Sven

    Otto-von-Guericke-Universit¨at Magdeburg Fakult¨at f¨ur Informatik Institut f¨ur Technische und (IVS) Otto-von-Guericke-Universit¨at Magdeburg Fakult¨at f¨ur Informatik Postfach 4120, D­39016 Programmie- rung eingebetteter Systeme Diplomarbeit, Otto-von-Guericke-Universit¨at Magdeburg, 2008. #12;i

  17. Ludwig Pulst Ein Analogon eines Satzes von Moser auf

    E-print Network

    Grunau, Hans-Christoph

    ­ Betreuer: Prof. Dr. H.-Ch. Grunau Otto-von-Guericke-Universit¨at Magdeburg #12;#12;Inhaltsverzeichnis 1Ludwig Pulst Ein Analogon eines Satzes von Moser auf der S4 ­ ¨uberarbeitete Diplomarbeit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 4 Der Satz von Moser f¨ur die Q

  18. Universitat Regensburg The time-dependent von Karman plate

    E-print Network

    Regensburg, Universität - Naturwissenschaftliche Fakultät I

    Universit¨at Regensburg Mathematik The time-dependent von K´arm´an plate equation as a limit of 3D-DEPENDENT VON K´ARM´AN PLATE EQUATION AS A LIMIT OF 3D NONLINEAR ELASTICITY HELMUT ABELS, MARIA GIOVANNA MORA plate equation. Keywords: dimension reduction, nonlinear elasticity, von K´arm´an plate equation, wave

  19. Dr. Wernher Von Braun talkes with George Hardy.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    George Hardy of the Marshall Space Flight center's Astronautics Laboratory, talks with Dr. Wernher Von Braun (right), deputy associate administrator for planning. Dr. Von Braun was inspecting the mockup of the Saturn workshop during a visit to the Marshall Center. The visit coincided with the 10th anniversary celebration of the center of which Dr. Von Braun was director until March 1, 1970.

  20. John von Neumann Institute for Computing Material Science

    E-print Network

    John von Neumann Institute for Computing Material Science R. O. Jones published in NIC Symposium 2001, Proceedings, Horst Rollnik, Dietrich Wolf (Editor), John von Neumann Institute for Computing, J¨ulich, NIC Series, Vol. 9, ISBN 3-00-009055-X, pp. 211-212, 2002. c 2002 by John von Neumann Institute

  1. Effiziente Integration von Anfragealgebra-Modulen in ein

    E-print Network

    Güting, Ralf Hartmut

    Effiziente Integration von Anfragealgebra-Modulen in ein generisches Datenbankrahmensystem Stefan 2/17 Effiziente Integration von Anfragealgebra-Modulen Motivation · viele neue Anwendungen benötigen/17 Effiziente Integration von Anfragealgebra-Modulen Second-Order Signature: ein Metadatenmodell · Prinzip

  2. Der Algorithmus von Tate f ur elliptische Kurven

    E-print Network

    Hartl, Urs

    Der Algorithmus von Tate fË? ur elliptische Kurven Freie wissenschaftliche Arbeit zur Erlangung des Grades eines Diplommathematikers am Mathematischen Fachbereich der UniversitË? at Ulm Eingereicht von: Urs eigentliche und regulË? are Modell . . . . . . . . . . . . . . . . . 22 4 Der Algorithmus von Tate 26 5 Beweis

  3. Seite 1 von 4 Betreuungsvereinbarung im Rahmen eines Promotionsvorhabens

    E-print Network

    Kuehnlenz, Kolja

    Seite 1 von 4 Betreuungsvereinbarung im Rahmen eines Promotionsvorhabens an der Technischen der Eintragung in die Promotionsliste noch nicht vor, wird aber innerhalb von 12 Monaten, also zur Promotion. 2. Zeitplan 2.1 Das Promotionsvorhaben soll innerhalb von ________ Jahren abgeschlossen

  4. John von Neumann Institute for Computing Materials Science

    E-print Network

    John von Neumann Institute for Computing Materials Science R. O. Jones published in NIC Symposium 2008, G. M¨unster, D. Wolf, M. Kremer (Editors), John von Neumann Institute for Computing, J¨ulich, NIC Series, Vol. 39, ISBN 978-3-9810843-5-1, pp. 151-152, 2008. c 2008 by John von Neumann Institute

  5. Eduard von Keyserling Die verwitwete Frstin Adelheid von Neustatt-Birken-

    E-print Network

    Prodinger, Helmut

    Verwalter ihres Gutes, über ihre Fi- nanzen zu sprechen. Der Fürst Ernst von Birkenstein war im besten Bericht mache. Die Fürstin jedoch lag regungslos in ihrem Stuhle und schaute durch das geöffnete Fen- ster

  6. 20 Kombination von C++ und Java 20-1(368) 20 Kombination von C++ und Java

    E-print Network

    Arndt, Holger

    20 Kombination von C++ und Java 20-1(368) 20 Kombination von C++ und Java Inhalt 20.1 Java Native Interface (JNI) 20.1.1 C++-Funktionen aus Java aufrufen 20.1.2 Java-Funktionen aus C++ aufrufen 20.2 gcj und das Compiled Native Interface (CNI) 20.2.1 C++-Funktionen aus Java aufrufen 20.2.2 Java-Funktionen aus

  7. 20 Kombination von C++ und Java 20-1 20 Kombination von C++ und Java

    E-print Network

    Arndt, Holger

    20 Kombination von C++ und Java 20-1 20 Kombination von C++ und Java Inhalt 20.1 Java Native Interface (JNI) 20.1.1 C++-Funktionen aus Java aufrufen 20.1.2 Java-Funktionen aus C++ aufrufen 20.2 gcj und das Cygnus Native Interface (CNI) 20.2.1 C++-Funktionen aus Java aufrufen 20.2.2 Java-Funktionen aus C

  8. Nurenberg 1811 -de Karl Von Langsdorf

    E-print Network

    Préaux, Jean-Philippe

    Martin Ohm Nurenberg ­ 1811 - de Karl Von Langsdorf Erfurt -1781 - de Jean-Baptiste Fourier fr Bernouilli 1694 - ch Leonhard Euler Basel -1726 - ch Joseph Lagrange fr Simeon Poisson E.Polytechnique - fr -1685 - de Otto Mencke Leipzig -1665 - de Friedrich Thibaut Kiel - 1796 - de Jean-Philippe Préaux

  9. Hermann von Helmholtz (1821-1894)

    E-print Network

    École Normale Supérieure

    Hermann von Helmholtz (1821-1894) Notes for Multimedia Fluid Mechanics Cambridge University Press. ________________________________________________________________ His life Berlin (1821-1848) Hermann Ludwig Ferdinand Helmholtz was born in Potsdam (Prussia) on August, 2008 The breadth of Helmholtz's interests and contributions is outstanding. He is one of the rare

  10. 3D Postprozessor Diplomarbeit von Samuel Gerber

    E-print Network

    Gerber, Samuel

    3D Postprozessor Diplomarbeit von Samuel Gerber Fachhochschule Aargau FHA University of Applied¨angsschnitt . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3.4 Querschnit . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3.5 3D-Bilder . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 3D Ansicht . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5 Bericht

  11. Dr. von Braun Discusses 'Bottle Suit' Concept

    NASA Technical Reports Server (NTRS)

    1954-01-01

    Dr. Wernher von Braun (center), then Chief of the Guided Missile Development Division at Redstone Arsenal, Alabama, discusses a 'bottle suit' model with Dr. Heinz Haber (left), an expert on aviation medicine, and Willey Ley, a science writer on rocketry and space exploration. The three men were at the Disney studios appearing in the motion picture, entitled 'Man in Space.'

  12. Guido von Pirquet: Austrian pioneer of astronautics

    NASA Technical Reports Server (NTRS)

    Sykora, F.

    1977-01-01

    The works of Guido von Pirquet, Austrian pioneer of rocketry, were assessed. Major emphasis was given to Pirquet's calculation of the route to Venus which in fact was followed by the first Russian rocket to Venus. Of interest also is Pirquet's valuable construction of a space station and his analysis of interstellar space flight.

  13. Emil von Behring and serum therapy.

    PubMed

    Winau, Florian; Winau, Rolf

    2002-02-01

    Emil von Behring is the father of serum therapy. We present an overview of the development of this important tool in the treatment of diphtheria. In a historical context Behring's work reflects the scientific spirit of fin de siècle Berlin. PMID:11880051

  14. Dr. von Braun Visits Huntsville Boys Club

    NASA Technical Reports Server (NTRS)

    1961-01-01

    Dr. von Braun, Director of Marshall Space Flight Center (MSFC) and chairman of this year's United Givers Fund (UGF) drive at MSFC, takes time out from the problems of sending a man to the Moon to talk baseball with 11-year-old Randy Smith at the Huntsville Boys Club.

  15. Dr. Wernher Von Braun presents a certificate

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun (left), director of the Marshall Space Flight Center, presents a humorous certificate to Major General Charles W. Eifler, commanding general of Redstone Arsenal, at the close of a farewell luncheon for the general prior to General Eifler moving to a new European duty station.

  16. Humans 'still evolving' John von Radowitz

    E-print Network

    Lummaa, Virpi

    Humans 'still evolving' John von Radowitz Tuesday 01 May 2012 Darwinian "survival scientists. A popular misconception is that humans stopped evolving when they took up farming and embraced: "We have shown advances have not challenged the fact that our species is still evolving, just like all

  17. Entwicklung von Landnutzungsszenarien für landschaftsökologische Fragestellungen

    NASA Astrophysics Data System (ADS)

    Fritsch, Uta

    2002-04-01

    Die Landschaften Mitteleuropas sind das Resultat einer langwierigen Geschichte menschlicher Landnutzung mit ihren unterschiedlichen, z.T. konkurrierenden Nutzungsansprüchen. Durch eine überwiegend intensive Beanspruchung haben die direkten und indirekten Auswirkungen der Landnutzung in vielen Fällen zu Umweltproblemen geführt. Die Disziplin der Landschaftsökologie hat es sich zur Aufgabe gemacht, Konzepte für eine nachhaltige Nutzung der Landschaft zu entwickeln. Eine wichtige Fragestellung stellt dabei die Abschätzung der möglichen Folgen von Landnutzungsänderungen dar. Für die Analyse der relevanten Prozesse in der Landschaft werden häufig mathematische Modelle eingesetzt, welche es erlauben die Landschaft unter aktuellen Verhältnissen oder hinsichtlich veränderter Rahmenbedingungen zu untersuchen. Die hypothetische Änderung der Landnutzung, die als Landnutzungsszenario bezeichnet wird, verkörpert eine wesentliche Modifikation der Rahmenbedingungen, weil Landnutzung mageblich Einfluss auf die natürlichen Prozesse der Landschaft nimmt. Während die Antriebskräfte einer solchen Änderung überwiegend von sozio-ökonomischen und politischen Entscheidungen gesteuert werden, orientiert sich die exakte Verortung der Landnutzungsänderungen an den naturräumlichen Bedingungen und folgt z.T. erkennbaren Regeln. Anhand dieser Vorgaben ist es möglich, räumlich explizite Landnutzungsszenarien zu entwickeln, die als Eingangsdaten für die Modellierung verschiedener landschaftsökologischer Fragestellungen wie z.B. für die Untersuchung des Einflusses der Landnutzung auf den Wasserhaushalt, die Erosionsgefahr oder die Habitatqualität dienen können. Im Rahmen dieser Dissertation wurde das rasterbasierte deterministische Allokationsmodell luck (Land Use Change Scenario Kit) für die explizite Verortung der Landnutzungsänderungen entwickelt. Es basiert auf den in der Landschaftsökologie üblichen räumlichen Daten wie Landnutzung, Boden sowie Topographie und richtet sich bei der Szenarienableitung nach den Leitbildern der Landschaftsplanung. Das Modell fut auf der Hypothese, dass das Landnutzungsmuster als Funktion seiner landschaftsökologischen Faktoren beschrieben werden kann. Das Veränderungspotenzial einer Landnutzungseinheit resultiert im Modell aus einer Kombination der Bewertung der relativen Eignung des Standortes für die jeweilige Landnutzung und der Berücksichtigung von Standorteigenschaften der umliegenden Nachbarn. Die Durchführung der Landnutzungsänderung im Modell ist iterativ angelegt, um den graduellen Prozess des Landschaftswandels nachvollziehen zu können. Als Fallbeispiel für die Anwendung solcher räumlich expliziten Landnutzungsszenarien dient die Fragestellung, inwieweit Landnutzungsänderungen die Hochwasserentstehung beeinflussen. Um den Einfluss auf die Hochwasserentstehung für jede der Landnutzungskategorien – bebaute, landwirtschaftlich genutzte und naturnahe Flächen – abschätzen zu können, wird im Landnutzungsmodell luck exemplarisch für jede Kategorie ein Teilmodell für die Veränderung von Landnutzung angeboten: 1) Ausdehnung der Siedlungsfläche: Dieses Teilmodell fut auf der Annahme, dass sich Siedlungen nur in direkter Nachbarschaft bereits bestehender Bebauung und bevorzugt entlang von Entwicklungsachsen ausbreiten. Steile Hangneigungen stellen für potenzielle Standorte ein Hemmnis bei der Ausbreitung dar. 2) Stilllegung von Grenzertragsackerflächen: Gemä der Hypothese, dass sich die Stilllegung von Ackerflächen an der potenziellen Ertragsleistung der Standorte orientiert, werden in diesem Teilmodell alle Ackerstandorte dahingehend bewertet und die Flächen mit der geringsten Leistungsfähigkeit stillgelegt. Bei homogenen Gebietseigenschaften werden die Stilllegungsflächen zufällig auf die Ackerfläche verteilt. 3) Etablierung von Schutzgebieten in Ufer- und Auenbereichen: Ausgehend von der These, dass sich entlang von Flüssen sensible Flächen befinden, deren Schutz positive Folgen für das Leistungsvermögen der Landschaft haben kann, w

  18. On von Neumann's Examples of Types

    E-print Network

    Renato Nobili

    2008-09-11

    The paper introduces in a new although maybe unusual form the examples of types provided by J. von Neumann and F.J. Murray in their outstanding papers on algebraic factorization (1936-1943)pursuing three main aims: speculating about the physical reasons and motivations that are likely to have been at the origin of von Neumann's investigation; describing the examples of factors provided by those authors with the purpose of clarifying the general concepts standing at the base of the classification of factors into three general types; outlining the perspective of extending the theory to non--separable Hilbert spaces with the purpose of suggesting a novel approach to the representation of infinite systems controlled by external gauge fields.

  19. Von Neumann's Quantization of General Relativity

    E-print Network

    Arbuzov, A B; Cirilo-Lombardo, D J; Nazmitdinov, R G; Han, Nguyen Suan; Pavlov, A E; Pervushin, V N; Zakharov, A F

    2015-01-01

    Von Neumann's procedure is applied for quantization of General Relativity. We quantize the initial data of dynamical variables at the Planck epoch, where the Hubble parameter coincides with the Planck mass. These initial data are defined via the Fock simplex in the tangent Minkowskian space-time, the Dirac conformal interval. The Einstein cosmological principle is applied for the average of the spatial metric determinant logarithm over the spatial volume of the visible Universe. We derive the splitting of the general coordinate transformations into the diffeomorphisms (as the object of the second Noether theorem) and the initial data transformations (as objects of the first Noether theorem). Following von Neumann, we suppose that the vacuum state is a quantum ensemble. The vacuum state is degenerated with respect to quantum numbers of non-vacuum states with the distribution function that yields the Casimir effect in gravidynamics in analogy to the one in electrodynamics. The generation functional of the pertu...

  20. Universitt Konstanz WS 2004/2005 Fachbereich Informatik Zeichnen von Graphen

    E-print Network

    Brandes, Ulrik

    Universität Konstanz WS 2004/2005 Fachbereich Informatik Zeichnen von Graphen Prof. Dr. Ulrik Brandes Der Algorithmus von Walker und seine Verbesserung basierend auf einer Arbeit von Christoph von Walker wird in vielen Bereichen genutzt, um Bäume von unbeschränktem Grad zu zeichnen. Bis zu

  1. Einfuhrung in die Informatik 2" Der Algorithmus von Knuth, Morris und Pratt

    E-print Network

    Brandes, Ulrik

    gilt s ist Rand von t, falls s sowohl Pr¨afix als auch Suffix von t ist Es seien EINSTEINSTREIFTEEINSTEINSTEIN - s ist Infix von t 3 EINSTEINSTREIFTEEINSTEINSTEIN - s ist Suffix von t Also ist s ein Rand von t; s ist sogar eigentlicher Rand, da es keinen l¨angeren Rand in t gibt Sven Kosub (Algorithmik/TKS) EI2

  2. Einfuhrung in die Informatik 2" Der Algorithmus von Knuth, Morris und Pratt

    E-print Network

    Brandes, Ulrik

    Rand von t, falls s sowohl Pr¨afix als auch Suffix von t ist Es seien t =EINSTEINSTREIFTEEINSTEINSTEIN - s ist Infix von t 3 EINSTEINSTREIFTEEINSTEINSTEIN - s ist Suffix von t Also ist s ein Rand von t; s ist sogar eigentlicher Rand, da es keinen l¨angeren Rand in t gibt Sven Kosub (Algorithmik/TKS) EI2 (¨U

  3. On Koopman-von Neumann Waves

    E-print Network

    D. Mauro

    2001-05-23

    In this paper we study the classical Hilbert space introduced by Koopman and von Neumann in their operatorial formulation of classical mechanics. In particular we show that the states of this Hilbert space do not spread, differently than what happens in quantum mechanics. The role of the phases associated to these classical "wave functions" is analyzed in details. In this framework we also perform the analog of the two-slit experiment and compare it with the quantum case.

  4. On Koopman-von Neumann Waves

    NASA Astrophysics Data System (ADS)

    Mauro, D.

    In this paper we study the classical Hilbert space introduced by Koopman and von Neumann in their operatorial formulation of classical mechanics. In particular we show that the states of this Hilbert space do not spread, differently from what happens in quantum mechanics. The role of the phases associated to these classical ``wave functions'' is analyzed in detail. In this framework we also perform the analog of the two-slit interference experiment and compare it with the quantum case.

  5. Baron von Zach's business relations with the Munich entrepreneur Joseph von Utzschneider (German Title: Geschäftsbeziehungen des Barons von Zach zu dem Münchner Unternehmer Joseph von Utzschneider)

    NASA Astrophysics Data System (ADS)

    Schneider, Ivo

    The relationship between the astronomer von Zach on the one side and the entrepreneur Joseph von Utzschneider and his partner Georg von Reichenbach on the other dates presumably from the year 1807 when Zach spent two months in Munich. Already in the same year Zach had ordered an instrument for himself and began to solicit business for the institute of Reichenbach, Utzschneider, and Liebherr, which was founded in 1804. One of the clients canvassed by Zach was the director of the observatory in Naples Zuccari. Zuccari had ordered the whole equipment for the new observatory from this institute in 1813. The instruments for Naples, which were completed in 1814, were sent accompanied by Reichenbach by land and sea to their destination where Reichenbach supervised their setup. At that time Reichenbach had separated from Utzschneider who kept the optical institute in Benediktbeuern with his new partner Joseph von Fraunhofer whereas Reichenbach became owner of the mathematical-mechanical institute in Munich. For personal and economical reasons Utzschneider began soon after to produce not only optical glass but also optical devices similar to those offered by Reichenbach. As soon as two institutes in Munich competed against each other on the market for sophisticated geodetical and astronomical instruments Zach sided with Utzschneider. Zach's main professional argument for this decision was that both competitors got the optical glass for their instruments from Utzschneider's optical institute in Benediktbeuern. This meant that Utzschneider had first choice and so the optical part of his instruments could be considered as better than that of Reichenbach`s instruments. Zach's role as an agent in Italy and France for the sale of products coming from Utzschneider's manufactories is highlighted by three of Zach's letters to Utzschneider from 1817 and 1818, two of which are reproduced here for the first time.

  6. Approximating incompatible von Neumann measurements simultaneously

    E-print Network

    Heinosaari, Teiko; Reitzner, Daniel; Ziman, Mario

    2010-01-01

    We study the problem of performing orthogonal qubit measurements simultaneously. Since these measurements are incompatible, one has to accept additional imprecision. An optimal joint measurement is the one with least possible imprecision. All earlier considerations of this problem have concerned only joint measurability of observables, while in this work we also take into account conditional state transformations, i.e. instruments. We characterize the optimal joint instrument for two orthogonal von Neumann instruments as being the Luders instrument of the optimal joint observable.

  7. Abbildung 78: Collage von J.M. Harms ,,Die 30S ribosomale Untereinheit von Thermus thermophilus: Von den Kristallen zur Struktur." Die 2-dimensionale Struktur der 16S RNA

    E-print Network

    MPG Abbildung 78: Collage von J.M. Harms ,,Die 30S ribosomale Untereinheit von Thermus thermophilus: Von den Kristallen zur Struktur." Die 2-dimensionale Struktur der 16S RNA wurde aus Gutell et al. 2000 Beziehungen zwischen der Struktur und der Funktion von biologischen Makromolekülen. Thematische Schwerpunkte

  8. Tight junctions in Gerbil von Ebner's gland: horseradish peroxidase and freeze-fracture studies.

    PubMed

    Huang, Anthony Y; Chen, Ming-Huei; Wu, Sandy Y; Lu, Kuo-Shyan

    2015-03-01

    The permeability of tight junctions to horseradish peroxidase (HRP) and the freeze-fracture appearance of junctional structures were investigated in the von Ebner's gland of gerbils. In the tracing study, HRP was either administered topically on the dorsal surface of tongues or injected subepithelially into the connective tissue of vallate papillae for 5-30 min. Lingual tissues containing the von Ebner's gland were sectioned and examined by light and electron microscopy. In von Ebner's glands, the reaction product for HRP was found in the intercellular and interstitial spaces, whereas HRP appeared to penetrate the tight junctions and the reaction product was localized in the lumina of serous acini. In contrast, the staining for HRP that delineated the boundary of epithelial cells was frequently observed in the superficial layers of the lingual epithelium but not the underlying tissues while applying HRP topically. Freeze-fracture replicas of acinar cells revealed that the tight junction had a depth of 0.815?±?0.023 ?m, and 4-6 parallel strands on the protoplasmic fracture face, with a branching network of joining strands with interruptions, interconnections and high linear strand density apically, and corresponding grooves on the extracellular face. Quantitative analyses showed a greater number of strands (7.217?±?0.326) in gerbils compared to those of acinar cells (3.86?±?0.22) in mice. These results demonstrate that the tight junctions in the gerbil von Ebner's gland is permeable, and that specific species differences in tight junction structures may be associated with the mechanism for survival in an extremely dry environment. PMID:25639455

  9. Early turbulence in von Karman swirling flow of polymer solutions

    NASA Astrophysics Data System (ADS)

    Burnishev, Yuri; Steinberg, Victor

    2015-01-01

    We present quantitative experimental results on the transition to early turbulence in von Karman swirling flow of water- and water-sugar-based polymer solutions compared to the transition to turbulence in their Newtonian solvents by measurements of solely global quantities as torque ?(t) and pressure p(t) with large statistics as a function of Re. For the first time the transition values of Re_c\\textit{turb} to fully developed turbulence and turbulent drag reduction regime Re_c\\textit{TDR} are obtained as functions of elasticity El by using the solvents with different viscosities and polymer concentrations ?. Two scaling regions for fundamental turbulent characteristics are identified and they correspond to the turbulent and TDR regimes. Both Re_c\\textit{turb} and Re_c\\textit{TDR} are found via the dependence of the friction coefficient Cf and Cp, defined through scaled average torque \\bar? and rms pressure fluctuations p\\textit{rms} , respectively, on Re for different El and ? and via the limits of the two scaling regions.

  10. Fakultt fr Informatik Otto-von-Guericke-Universitt Magdeburg

    E-print Network

    Passau, Universität

    Fakultät für Informatik Otto-von-Guericke-Universität Magdeburg Nr.: M. Kuhlemann, C. Kästner, S-Oriented Programming #12;Fakultät für Informatik Otto-von-Guericke-Universität Magdeburg Nr.: FIN-006-2011 An Algebra Datenbanken Technical report (Internet) Elektronische Zeitschriftenreihe der Fakultät für Informatik der Otto-von-Guericke

  11. Fakultt fr Informatik Otto-von-Guericke-Universitt Magdeburg

    E-print Network

    Apel, Sven

    Fakultät für Informatik Otto-von-Guericke-Universität Magdeburg Nr.: FIN-013-2009 Combining Static Arbeitsgruppe Datenbanken #12;Impressum (§ 5 TMG): Herausgeber: Otto-von-Guericke-Universität Magdeburg Fakultät für Informatik Der Dekan Verantwortlich für diese Ausgabe: Otto-von-Guericke-Universität Magdeburg

  12. Fakultt fr Informatik Otto-von-Guericke-Universitt Magdeburg

    E-print Network

    Apel, Sven

    Fakultät für Informatik Otto-von-Guericke-Universität Magdeburg Nr.: FIN-15-2008 Refactoring Feature Modules Martin Kuhlemann Arbeitsgruppe Datenbanken #12;Fakultät für Informatik Otto-von-Guericke;Impressum (§ 10 MDStV): Herausgeber: Otto-von-Guericke-Universität Magdeburg Fakultät für Informatik Der

  13. Fakultt fr Informatik Otto-von-Guericke-Universitt Magdeburg

    E-print Network

    Kaestner, Christian

    Fakultät für Informatik Otto-von-Guericke-Universität Magdeburg Nr.: FIN-02-2008 Language, Martin Kuhlemann, Don Batory Arbeitsgruppe Datenbanken #12;Impressum (§ 10 MDStV): Herausgeber: Otto-von-Guericke-Universität Magdeburg Fakultät für Informatik Der Dekan Verantwortlich für diese Ausgabe: Otto-von-Guericke

  14. Fakultt fr Informatik Otto-von-Guericke-Universitt Magdeburg

    E-print Network

    Fakultät für Informatik Otto-von-Guericke-Universität Magdeburg Nr.: FIN-11-2008 Colloquium) Arbeitsgruppe Automaten und Formale Sprachen #12;Impressum (§ 10 MDStV): Herausgeber: Otto-von-Guericke-Universität Magdeburg Fakultät für Informatik Der Dekan Verantwortlich für diese Ausgabe: Otto-von-Guericke

  15. Otto-von-Guericke-Universitt Magdeburg Fakultt fr Informatik

    E-print Network

    Kaestner, Christian

    Otto-von-Guericke-Universität Magdeburg Fakultät für Informatik Institut für Technische und.-Ing. Christian Kästner, Dipl.-Wirtsch.-Inf. Thomas Leich Otto-von-Guericke-Universität Magdeburg Fakultät für-Präprozessor- konfigurierten Anwendungen Diplomarbeit, Otto-von-Guericke-Universität Magdeburg, 2010. #12;Danksagung An dieser

  16. Dr. von Braun and Army Ballistics Missile Agency (ABMA) Group

    NASA Technical Reports Server (NTRS)

    1959-01-01

    This photograph of Dr. von Braun, shown here to the left of General Bruce Medaris, was taken in the fall of 1959, immediately prior to Medaris' retirement from the Army. At the time, von Braun and his associates worked for the Army Ballistics Missile Agency in Huntsville, Alabama. Those in the photograph have been identified as Ernst Stuhlinger, Frederick von Saurma, Fritz Mueller, Hermarn Weidner, E.W. Neubert (partially hidden), W.A. Mrazek, Karl Heimburg, Arthur Rudolph, Otto Hoberg, von Braun, Oswald Lange, Medaris, Helmut Hoelzer, Hans Maus, E.D. Geissler, Hans Heuter, and George Constan.

  17. 5. Historic American Buildings Survey David von Riesen, Photographer July ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Historic American Buildings Survey David von Riesen, Photographer July 1965 NORTHWEST (Old Rear) ELEVATION - First Territorial Capitol of Kansas, Fort Riley Military Reserve, Riley, Riley County, KS

  18. Ein Konzept für den energieeffizienten Betrieb von Mobilfunknetzen

    NASA Astrophysics Data System (ADS)

    Bayer, N.; von Hugo, D.

    2015-11-01

    Der flächendeckende Betrieb mehrerer Mobilfunknetze unterschiedlicher Technologie in einem Land sorgt aufgrund der ständigen Bereithaltung von Übertragungskapazität für Dienste mit zunehmend höherem Datenvolumenbedarf für einen erheblichen Energieverbrauch. Das Forschungsförderungsprojekt ComGreen hat sich zur Aufgabe gesetzt, durch lastadaptiven Betrieb und intelligente dynamische Rekonfiguration des Funkzugangsnetzes zur Energieeinsparung beizutragen. Konzept, Herausforderungen, ausgewählte Ergebnisse von Simulationen und prototypischem Betrieb werden ebenso wie typische Erwartungswerte des künftigen Energieverbrauchs im Mobilfunkbereich vorgestellt. Sowohl Berechnungen als auch Messungen zeigen, dass durch kontext-basierte dynamische Rekonfiguration von zellularen Funknetzen Energieeinsparungen im Bereich von 25-40 % ermöglicht werden.

  19. 6. Historic American Buildings Survey David von Riesen, Photographer July ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey David von Riesen, Photographer July 1965 SOUTHEAST (Old Front) ELEVATION - First Territorial Capitol of Kansas, Fort Riley Military Reserve, Riley, Riley County, KS

  20. Diploma Supplement: Aktivittenliste und Laufzettel (Stand: September 2011) Laufzettel (Nr. ___ von ______________________________________________)

    E-print Network

    Kuehnlenz, Kolja

    Diploma Supplement: Aktivitätenliste und Laufzettel (Stand: September 2011) Laufzettel (Nr. ___ von ausgefüllt) Aktivität (Nr.): Teilnahmezeitraum: von: ___________bis: ___________ MM/JJJJ MM/JJJJ Hiermit: Aktivität (Nr.): Teilnahmezeitraum: von: ___________bis: ___________ MM/JJJJ MM/JJJJ Hiermit bestätige ich

  1. 17.00 Begrssung von Prof. Dr. Walter Bircher Rektor der PHZH

    E-print Network

    Steiner, Daniel

    Programm 17.00 Begrüssung von Prof. Dr. Walter Bircher Rektor der PHZH Gedanken zur Internationalisierung von Bildung und Pädagogik Benedikt Hauser, Staatssekretariat für Bildung und Forschung Stiftung Pestalozzianum für beste Arbeiten von Studierenden Monika Weber, Präsidentin Stiftungsrat Stiftung

  2. Entwurf und Verifikation von Hardware/Software -SystemenEntwurf und Verifikation von Hardware/Software -Systemen Lehrstuhl fr Technische Informatik

    E-print Network

    Ould Ahmedou, Mohameden

    Entwurf und Verifikation von Hardware/Software - SystemenEntwurf und Verifikation von Hardware Exploration Applikation Plattform SimulativeSimulative und analytischeund analytische Bewertung von virtuellenBewertung von virtuellen PrototypenPrototypen FrFrüühzeitige Aufdeckung derhzeitige Aufdeckung der Verletzung

  3. Review of: Transatlatic echoes: Alexander von Humbolt in World Literature and Cosmos and Colonialism: Alexander von Humbult in Cultural Criticism.

    E-print Network

    Baron, Frank

    2011-01-01

    ://kuscholarworks.ku.edu Review of: Transatlatic echoes: Alexander von Humbolt in World Literature and Cosmos and Colonialism: Alexander von Humbult in Cultural Criticism. by Frank Baron KU ScholarWorks is a service provided by the KU Libraries’ Office of Scholarly... Communication & Copyright. This is the published version of the Book Review, made available with the permission of the publisher. The original published version can be found at the link below. Baron, Frank “Review of: Transatlatic echoes: Alexander von...

  4. Produkte von affinen Varietaten. Proposition 2.3.9. Das Tensorprodukt von R-Algebren hat folgende Eigenschaften

    E-print Network

    Hartl, Urs

    Produkte von affinen Variet¨aten. Proposition 2.3.9. Das Tensorprodukt von R-Algebren hat folgende Eigenschaften: (a) R R R = R . (b) R R R - R R R , x y y x ist ein Isomorphismus von R-Algebren. (c) R[x1, . . . , xn] R R = R [x1, . . . , xn]. (d) Ist I R ein Ideal, so ist (R /I) R R = (R R R )/I·(R R R ). (e

  5. Produkte von a#nen Variet aten. Proposition 2.3.9. Das Tensorprodukt von RAlgebren hat folgende Eigenschaften

    E-print Network

    Hartl, Urs

    Produkte von a#nen VarietË? aten. Proposition 2.3.9. Das Tensorprodukt von R­Algebren hat folgende Eigenschaften: (a) R# R R ## = R ## . (b) R ## R R ## # -# R ### R R # , x# y ## y# x ist ein Isomorphismus von R­Algebren. (c) R[x 1 , . . . , x n ]# R R ## = R ## [x 1 , . . . , x n ]. (d) Ist I # R # ein Ideal

  6. Ein generisches Kreislaufmodell zur Einbettung von Data-Mining-Analysen in die Geschaftsprozesse von

    E-print Network

    Ulm, Universität

    Ein generisches Kreislaufmodell zur Einbettung von Data-Mining-Analysen in die Gesch "Data-Mining" oder "Knowledge Discovery in Databases" zusammen- gefassten Verfahren liefern jedoch nur und in der Praxis angewendet werden kann. Schlagworte: Data-Mining, Knowledge Discovery in Databases

  7. Quantitative Finance CONTACT INFORMATION

    E-print Network

    Arnold, Elizabeth A.

    Quantitative Finance CONTACT INFORMATION Pamela Peterson Drake, PhD Department Head, Finance of Finance College of Business ZSH 325 (540) 568-8107 finkjd@jmu.edu Michelle Duncan, Advisor Academic Services Center College of Business ZSH 205 (540) 568-3078 duncanml@jmu.edu What is a quantitative finance

  8. Approximating incompatible von Neumann measurements simultaneously

    SciTech Connect

    Heinosaari, Teiko; Jivulescu, Maria Anastasia; Reitzner, Daniel; Ziman, Mario

    2010-09-15

    We study the problem of performing orthogonal qubit measurements simultaneously. Since these measurements are incompatible, one has to accept additional imprecision. An optimal joint measurement is the one with the least possible imprecision. All earlier considerations of this problem have concerned only joint measurability of observables, while in this work we also take into account conditional state transformations (i.e., instruments). We characterize the optimal joint instrument for two orthogonal von Neumann instruments as being the Lueders instrument of the optimal joint observable.

  9. On Koopman-Von Neumann Waves II

    NASA Astrophysics Data System (ADS)

    Gozzi, E.; Mauro, D.

    In this paper, we continue the study started in Ref. 1, of the operatorial formulation of classical mechanics given by Koopman and von Neumann (KvN) in the 1930s. In particular, we show that the introduction of the KvN Hilbert space of complex and square integrable "wave functions" requires an enlargement of the set of the observables of ordinary classical mechanics. The possible role and the meaning of these extra observables is briefly indicated in this work. We also analyze the similarities and differences between non-selective measurements and two-slit experiments in classical and quantum mechanics.

  10. On Koopman-von Neumann Waves II

    E-print Network

    E. Gozzi; D. Mauro

    2003-06-05

    In this paper we continue the study, started in [1], of the operatorial formulation of classical mechanics given by Koopman and von Neumann (KvN) in the Thirties. In particular we show that the introduction of the KvN Hilbert space of complex and square integrable "wave functions" requires an enlargement of the set of the observables of ordinary classical mechanics. The possible role and the meaning of these extra observables is briefly indicated in this work. We also analyze the similarities and differences between non selective measurements and two-slit experiments in classical and quantum mechanics.

  11. Approximating incompatible von Neumann measurements simultaneously

    E-print Network

    Teiko Heinosaari; Maria Anastasia Jivulescu; Daniel Reitzner; Mario Ziman

    2010-10-11

    We study the problem of performing orthogonal qubit measurements simultaneously. Since these measurements are incompatible, one has to accept additional imprecision. An optimal joint measurement is the one with the least possible imprecision. All earlier considerations of this problem have concerned only joint measurability of observables, while in this work we also take into account conditional state transformations (i.e., instruments). We characterize the optimal joint instrument for two orthogonal von Neumann instruments as being the Luders instrument of the optimal joint observable.

  12. Dr. von Braun Tries Out the Neutral Buoyancy Simulator (NBS)

    NASA Technical Reports Server (NTRS)

    1967-01-01

    Marshall Space Flight Center (MSFC) Director, Dr. von Braun, is shown leaving the suiting-up van wearing a pressure suit prepared for a tryout in the MSFC Neutral Buoyancy Simulator (NBS). Weighted to a neutrally buoyant condition, Dr. von Braun was able to perform tasks underwater which simulated weightless conditions found in space.

  13. Dr. von Braun Tries Out the Neutral Buoyancy Simulator (NBS)

    NASA Technical Reports Server (NTRS)

    1967-01-01

    Astronaut L. Gordon Cooper checks the neck ring of a space suit worn by Marshall Space Flight Center (MSFC) Director, Dr. von Braun before he submerges into the water of the MSFC Neutral Buoyancy Simulator (NBS). Wearing a pressurized suit and weighted to a neutrally buoyant condition, Dr. von Braun was able to perform tasks underwater which simulated weightless conditions found in space.

  14. Dr. von Braun Tries Out the Neutral Buoyancy Simulator (NBS)

    NASA Technical Reports Server (NTRS)

    1967-01-01

    Marshall Space Flight Center (MSFC) Director, Dr. von Braun, submerges after spending some time under water in the MSFC Neutral Buoyancy Simulator (NBS). Weighted to a neutrally buoyant condition, Dr. von Braun was able to perform tasks underwater which simulated weightless conditions found in space.

  15. KIT die Kooperation von Forschungszentrum Karlsruhe GmbH

    E-print Network

    Wu, Shin-Tson

    KIT ­ die Kooperation von Forschungszentrum Karlsruhe GmbH und Universität Karlsruhe (TH) www-Konfigurationen entwickelt. Die Anwendung dieser Methode ermöglicht es, neue Flüssigkristallanzeigen mit großem Blickwinkelbereich, hohem Kontrast und großer Bildhelligkeit zu bauen. Die Ergebnisse von Ge's Arbeit werden bereits

  16. Briefe aus Paris an seine Frau 1866 Helmholtz, Hermann von

    E-print Network

    Gertz, Michael

    Briefe aus Paris an seine Frau 1866 Helmholtz, Hermann von URL: http Nutzungsbedingungen: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html #12;Hermann Helmholtz Briefe aus Paris an seine Frau 1866 S. 130 ­ 135 aus Anna von Helmholtz : ein Lebensbild in Briefen

  17. CARL VON OSSIETZKY -UNIVERSITT OLDENBURG 14. Dezember 2008

    E-print Network

    Damm, Werner

    von: Nico Müller und Matthias Runge Stud.IP Für die Raumverwaltung #12;Carl von Ossietzky ­ Universität Oldenburg Seite 2 Inhaltsverzeichnis STUD.IP - EINF�HRUNG .......................................................................................................................................................... 11 3 STUD.IP SUPPORT

  18. Seite 1 von 4 for Academic Studies of International Students

    E-print Network

    Students at German Universities". #12;Seite 2 von 4 (OeAD-GmbH) (http://www.oead.at/index.php?id=3017&L=1 on everyday life at university ­ will be provided in English or possibly in the language of instruction. #12Seite 1 von 4 GUIDELINES for Academic Studies of International Students at Austrian Universities1

  19. The von Karman equations for plates with residual strain

    E-print Network

    Lewicka, Marta

    The von K´arm´an equations for plates with residual strain By Marta Lewicka1 , L. Mahadevan2 of the F¨oppl-von K´arm´an equations for the shape of and stresses in an elastic plate with residual dimensional equations of elasticity to the low-dimensional description embod- ied in the plate

  20. Seite 1 von 3 Max-Planck-Forschungspreis

    E-print Network

    Waldmann, Uwe

    Seite 1 von 3 Max-Planck-Forschungspreis Hinweise für eine vollständige Nominierung Erforderliche dabei besonders auf folgende Punkte: Die Alexander von Humboldt-Stiftung und die Max-Planck-Gesellschaft verleihen gemeinsam den vom Bundesministerium für Bildung und Forschung gestifteten Max-Planck

  1. Victor or Villain? Wernher von Braun and the Space Race

    ERIC Educational Resources Information Center

    O'Brien, Jason L.; Sears, Christine E.

    2011-01-01

    Set during the Cold War and space race, this historical role-play focuses on Wernher von Braun's involvement in and culpability for the use of slave laborers to produce V-2 rockets for Nazi Germany. Students will grapple with two central questions. Should von Braun have been allowed to emigrate to the United States given his affiliation with the…

  2. Connecting the von Neumann and Renyi entropies for Fermions

    E-print Network

    Mark Fannes; Nicholas Van Ryn

    2012-05-04

    We explore the relation between the von Neumann entropy and the Renyi entropies of integer orders for shift-invariant quasi-free Fermionic lattice systems. We investigate approximating the von Neumann entropy by a combination of integer-order Renyi entropies and give an estimate for the quality of such an approximation.

  3. Relative von Neumann entropy for evaluating amino acid conservation.

    PubMed

    Johansson, Fredrik; Toh, Hiroyuki

    2010-10-01

    The Shannon entropy is a common way of measuring conservation of sites in multiple sequence alignments, and has also been extended with the relative Shannon entropy to account for background frequencies. The von Neumann entropy is another extension of the Shannon entropy, adapted from quantum mechanics in order to account for amino acid similarities. However, there is yet no relative von Neumann entropy defined for sequence analysis. We introduce a new definition of the von Neumann entropy for use in sequence analysis, which we found to perform better than the previous definition. We also introduce the relative von Neumann entropy and a way of parametrizing this in order to obtain the Shannon entropy, the relative Shannon entropy and the von Neumann entropy at special parameter values. We performed an exhaustive search of this parameter space and found better predictions of catalytic sites compared to any of the previously used entropies. PMID:20981889

  4. Von Neumann's Quantization of General Relativity

    E-print Network

    A. B. Arbuzov; A. Yu. Cherny; D. J. Cirilo-Lombardo; R. G. Nazmitdinov; Nguyen Suan Han; A. E. Pavlov; V. N. Pervushin; A. F. Zakharov

    2015-11-11

    Von Neumann's procedure is applied for quantization of General Relativity. We quantize the initial data of dynamical variables at the Planck epoch, where the Hubble parameter coincides with the Planck mass. These initial data are defined via the Fock simplex in the tangent Minkowskian space-time, the Dirac conformal interval. The Einstein cosmological principle is applied for the average of the spatial metric determinant logarithm over the spatial volume of the visible Universe. We derive the splitting of the general coordinate transformations into the diffeomorphisms (as the object of the second Noether theorem) and the initial data transformations (as objects of the first Noether theorem). Following von Neumann, we suppose that the vacuum state is a quantum ensemble. The vacuum state is degenerated with respect to quantum numbers of non-vacuum states with the distribution function that yields the Casimir effect in gravidynamics in analogy to the one in electrodynamics. The generation functional of the perturbation theory in gravidynamics is given as a solution of the quantum energy constraint. We discuss the region of applicability of gravidynamics and its possible predictions for explanation of the modern observational and experimental data.

  5. Inattentional blindness and the von Restorff effect.

    PubMed

    Schmidt, Stephen R; Schmidt, Constance R

    2015-02-01

    Sometimes we fail to notice distinctive or unusual items (inattentional blindness), while other times we remember distinctive items more than expected items (the von Restorff effect). A three-factor framework is presented and tested in two experiments in an attempt to reconcile these seemingly contradictory phenomena. Memory for different types of unexpected stimuli was tested after an easy or difficult Stroop color-naming task. Highly arousing taboo words were well remembered even when the difficult Stroop task limited attentional resources. However, a conceptual isolation effect was only observed when the nature of the category change was highlighted by the Stroop task, the Stroop task was easy, and/or the isolated targets enjoyed a retrieval advantage relative to comparison targets. As proposed in the three-factor framework, the arousing qualities of the stimuli, the attentional demands of the primary task, and the relevance of isolated features at encoding and retrieval combine to produce inattentional blindness and the von Restorff effect. PMID:25169672

  6. Superfluid high REynolds von Kármán experiment.

    PubMed

    Rousset, B; Bonnay, P; Diribarne, P; Girard, A; Poncet, J M; Herbert, E; Salort, J; Baudet, C; Castaing, B; Chevillard, L; Daviaud, F; Dubrulle, B; Gagne, Y; Gibert, M; Hébral, B; Lehner, Th; Roche, P-E; Saint-Michel, B; Bon Mardion, M

    2014-10-01

    The Superfluid High REynolds von Kármán experiment facility exploits the capacities of a high cooling power refrigerator (400 W at 1.8 K) for a large dimension von Kármán flow (inner diameter 0.78 m), which can work with gaseous or subcooled liquid (He-I or He-II) from room temperature down to 1.6 K. The flow is produced between two counter-rotating or co-rotating disks. The large size of the experiment allows exploration of ultra high Reynolds numbers based on Taylor microscale and rms velocity [S. B. Pope, Turbulent Flows (Cambridge University Press, 2000)] (R? > 10000) or resolution of the dissipative scale for lower Re. This article presents the design and first performance of this apparatus. Measurements carried out in the first runs of the facility address the global flow behavior: calorimetric measurement of the dissipation, torque and velocity measurements on the two turbines. Moreover first local measurements (micro-Pitot, hot wire,…) have been installed and are presented. PMID:25362417

  7. Approximate von Neumann entropy for directed graphs

    NASA Astrophysics Data System (ADS)

    Ye, Cheng; Wilson, Richard C.; Comin, César H.; Costa, Luciano da F.; Hancock, Edwin R.

    2014-05-01

    In this paper, we develop an entropy measure for assessing the structural complexity of directed graphs. Although there are many existing alternative measures for quantifying the structural properties of undirected graphs, there are relatively few corresponding measures for directed graphs. To fill this gap in the literature, we explore an alternative technique that is applicable to directed graphs. We commence by using Chung's generalization of the Laplacian of a directed graph to extend the computation of von Neumann entropy from undirected to directed graphs. We provide a simplified form of the entropy which can be expressed in terms of simple node in-degree and out-degree statistics. Moreover, we find approximate forms of the von Neumann entropy that apply to both weakly and strongly directed graphs, and that can be used to characterize network structure. We illustrate the usefulness of these simplified entropy forms defined in this paper on both artificial and real-world data sets, including structures from protein databases and high energy physics theory citation networks.

  8. Ms. Christa von Hillebrandt-Andrade Christa von Hillebrandt-Andrade is the Caribbean Tsunami Center Director of the

    E-print Network

    Gilbes, Fernando

    Ms. Christa von Hillebrandt-Andrade Christa von Hillebrandt-Andrade is the Caribbean Tsunami Center and tsunami monitoring, warning and education services becoming a regional leader in this field. She has been. She is an internationally recognized expert in seismology and tsunamis. She has participated

  9. The Quantitative Methods Boot Camp: Teaching Quantitative Thinking and

    E-print Network

    Born, Richard

    biological systems. The boot camp teaches basic programming using biological examples from statistics, image processing, and data analysis. This integrative approach to teaching programming and quantitative reasoningEDUCATION The Quantitative Methods Boot Camp: Teaching Quantitative Thinking and Computing Skills

  10. On Quantitative Rorschach Scales.

    ERIC Educational Resources Information Center

    Haggard, Ernest A.

    1978-01-01

    Two types of quantitative Rorschach scales are discussed: first, those based on the response categories of content, location, and the determinants, and second, global scales based on the subject's responses to all ten stimulus cards. (Author/JKS)

  11. Quantitative film radiography

    SciTech Connect

    Devine, G.; Dobie, D.; Fugina, J.; Hernandez, J.; Logan, C.; Mohr, P.; Moss, R.; Schumacher, B.; Updike, E.; Weirup, D.

    1991-02-26

    We have developed a system of quantitative radiography in order to produce quantitative images displaying homogeneity of parts. The materials that we characterize are synthetic composites and may contain important subtle density variations not discernible by examining a raw film x-radiograph. In order to quantitatively interpret film radiographs, it is necessary to digitize, interpret, and display the images. Our integrated system of quantitative radiography displays accurate, high-resolution pseudo-color images in units of density. We characterize approximately 10,000 parts per year in hundreds of different configurations and compositions with this system. This report discusses: the method; film processor monitoring and control; verifying film and processor performance; and correction of scatter effects.

  12. Quantitative Imaging Network

    Cancer.gov

    The QIN Imaging Network is designed to promote research and development of quantitative imaging methods for the measurement of tumor response to therapies in clinical trial settings, with the overall goal of facilitating clinical decision-making. The

  13. Quantitative receptor autoradiography

    SciTech Connect

    Boast, C.A.; Snowhill, E.W.; Altar, C.A.

    1986-01-01

    Quantitative receptor autoradiography addresses the topic of technical and scientific advances in the sphere of quantitative autoradiography. The volume opens with a overview of the field from a historical and critical perspective. Following is a detailed discussion of in vitro data obtained from a variety of neurotransmitter systems. The next section explores applications of autoradiography, and the final two chapters consider experimental models. Methodological considerations are emphasized, including the use of computers for image analysis.

  14. Quantitative enantioselective Raman spectroscopy.

    PubMed

    Kiefer, J

    2015-08-01

    Analytical methods for quantitative enantioselective measurements are highly desirable in the life sciences. Existing technologies have disadvantages such as limited temporal resolution, the need for molecular labeling, or high experimental complexity. To overcome these limitations, this work presents a method based on conventional Raman spectroscopy. A systematic investigation of the key parameters is carried out. It is demonstrated that their careful choice provides an opportunity for enantioselective and quantitative analysis of enantiopure systems as well as enantiomer mixtures. PMID:26066374

  15. Die Berufung von Hermann Helmholtz an die Universitt in Heidelberg Werner, Franz

    E-print Network

    Gertz, Michael

    Die Berufung von Hermann Helmholtz an die Universität in Heidelberg Werner, Franz URL: http¨ATS- BIBLIOTHEK HEIDELBERG Heidelberger Texte zur Mathematikgeschichte Die Berufung von Hermann Helmholtz an die Universit¨at in Heidelberg von Franz Werner Quelle: Werner, Franz: Die Berufung von Hermann Helmholtz an die

  16. Faculty of Geoinformation Science and Earth Observation Lernen von Charles Joseph Minard: Neue Wege zur

    E-print Network

    Faculty of Geoinformation Science and Earth Observation Lernen von Charles Joseph Minard: Neue Wege zur Abbildung von Zeit Menno-Jan Kraak Lernen von Charles Joseph Minard: Neue Wege zur Abbildung von of world History Black, J. (1999) London: Dorling Kindersley #12;Minard's map in the style of the London

  17. Organisationsberatung Supervision Coaching, Heft 3/2003, S. 245-254 Evaluation von

    E-print Network

    Kaus, Boris

    Organisationsberatung ­ Supervision ­ Coaching, Heft 3/2003, S. 245-254 Evaluation von Coaching Eine Befragung von Coachs und Klienten zur Wirksamkeit von Coaching Anne Jansen, Eveline Mäthner an Forschungs- arbeiten zur Wirksamkeit von Coaching. Gerade im Hinblick auf eine wachsende Ver- breitung dieser

  18. Lizenzaktivierung von Mathematica an der Humboldt-Universitt zu Berlin betrifft: Einzelplatz-und Netzwerklizenzen

    E-print Network

    Peters, Achim

    Lizenzaktivierung von Mathematica an der Humboldt-Universität zu Berlin betrifft: Einzelplatz- und sich folgendes Fenster: #12;Hier geben Sie bitte Ihre HU-E-Mail-Adresse, Ihren Namen sowie ein von. Innerhalb von wenigen Minuten erhalten Sie die Bestätigungsmail von Wolfram Res. mit dem Aktivierungscode

  19. Optionen fr die Anpassung von Studien-und Prfungsbedingungen fr Studierende mit Beeintrchtigungen

    E-print Network

    Hamburg,.Universität

    Optionen für die Anpassung von Studien- und Prüfungsbedingungen für Studierende mit Beeinträchtigungen Anpassung von Studienbedingungen Anpassung von Studienverlauf und Pensum Teilzeitstatus (wegen Status ,,Beurlaubung") § 6 Abs. 6 ImmaO Modifikation von Studienverlauf (,,Persönlicher Studienplan

  20. Aufbau von Beschleunigern und Experimenten Abbildung 110: Geplante Trassenfhrung und Lage des FEL-

    E-print Network

    Aufbau von Beschleunigern und Experimenten Abbildung 110: Geplante Trassenführung und Lage des FEL- Fächers im Bereich Ellerhoop. 250 #12;Aufbau von Beschleunigern und Experimenten Aufbau von Beschleunigern und Experimenten Von der Gruppe ZMEA werden in enger Zusam- menarbeit mit dem M- und F-Bereich die

  1. Hermann von Helmholtz and his students

    NASA Astrophysics Data System (ADS)

    Mulligan, Joseph F.

    1989-01-01

    During the years 1871-1888, when Hermann von Helmholtz was professor of physics at the University of Berlin, physicists from all over the world flocked to Berlin to study and do research with him. Among these were the German physicists Max Planck, Heinrich Kayser, Eugen Goldstein, Wilhelm Wien, and Heinrich Hertz, and Americans Henry Rowland, A. A. Michelson, and Michael Pupin. Examples of Helmholtz's scientific and personal interactions with these students and research associates show why he is justly considered the outstanding physics mentor of the 19th century. Both his ideas and his students played a major role in the development of physics in the late 19th and early 20th centuries.

  2. Von Ungarn nach Auschwitz: Die verschwiegene Warnung.

    E-print Network

    Baron, Frank; Szenes, Sá ndor

    2010-10-19

    Sándor Szenes : geb. 1924 in Buda p e s t, hat die Depo r tatio n e n 1944 miterleb t . Er wurd e n ach Dach a u vers c h lep p t, ins KZ Lands b e r g verle g t und dort von amer ik a n is c h e n Sold a te n befr e it. Studiu m der Gesc h ic h te... und Politi k w i s s e n s c h a f t , Arbei t als Journa l i s t für Zeitun g e n und den unga r is c h e n Rund f u n k . Aufsä tz e über da s Schic k s a l der unga r is c h e n Jude n im II. Weltk rieg ; sein Buch über di eses Thema (Befej e z...

  3. Inertial Manifolds for von Karman Plate Equations

    SciTech Connect

    Chueshov, I. Lasiecka, I.

    2002-12-19

    Inertial manifolds associated with nonlinear plate models governed by dynamical von Karman equations are considered. Three different dissipative mechanisms are discussed: viscous, structural and thermal damping. Though the systems considered are subject to some dissipation, the overall dynamics may not be dissipative. This means that the energy may not be decreasing. The main result of the paper establishes the existence of an inertial manifold subject to the spectral gap condition for linearized problems. The validity of the spectral gap condition depends on the geometry of the domain and the type of damping. It is shown that the spectral gap condition holds for plates of rectangular shape. In the case of viscous damping, which is associated with hyperbolic-like dynamics, it is also required that the damping parameter be sufficiently large. This last requirement is not needed for other types of dissipation considered in the paper.

  4. [Von Willebrand disease in the Netherlands: the WiN study].

    PubMed

    Sanders, Yvonne V; de Wee, Eva M; Meijer, Karina; Eikenboom, J; van der Bom, Jeroen G; Fijnvandraat, C J Karin; Laros-van Gorkom, Britta A P; Cnossen, Marjon H; Mauser-Bunschoten, Evelien P; Leebeek, Frank W G

    2014-01-01

    Von Willebrand disease is the most common inherited bleeding disorder and is characterised by mucocutaneous bleeding. Von Willebrand disease is caused by reduced levels or reduced function of von Willebrand factor. Depending on the cause, von Willebrand disease is distinguished into various types with their own characteristics and treatment options. The frequency and severity of bleeding in patients with von Willebrand disease is strongly determined by von Willebrand factor levels, factor VIII levels and the type of von Willebrand disease. Eighty-five percent of all adult females with von Willebrand disease reports menorrhagia. A high percentage have postpartum excessive blood loss (37% of all deliveries). The quality of life is reduced in patients with von Willebrand disease. Patients with von Willebrand disease have a reduced risk of arterial thrombosis such as a myocardial or cerebral infarction. PMID:24800796

  5. Misfolding of vWF to Pathologically Disordered Conformations Impacts the Severity of von Willebrand Disease

    PubMed Central

    Tischer, Alexander; Madde, Pranathi; Moon-Tasson, Laurie; Auton, Matthew

    2014-01-01

    The primary hemostatic von Willebrand factor (vWF) functions to sequester platelets from rheological blood flow and mediates their adhesion to damaged subendothelium at sites of vascular injury. We have surveyed the effect of 16 disease-causing mutations identified in patients diagnosed with the bleeding diathesis disorder, von Willebrand disease (vWD), on the structure and rheology of vWF A1 domain adhesiveness to the platelet GPIb? receptor. These mutations have a dynamic phenotypical range of bleeding from lack of platelet adhesion to severe thrombocytopenia. Using new rheological tools in combination with classical thermodynamic, biophysical, and spectroscopic metrics, we establish a high propensity of the A1 domain to misfold to pathological molten globule conformations that differentially alter the strength of platelet adhesion under shear flow. Rheodynamic analysis establishes a quantitative rank order between shear-rate-dependent platelet-translocation pause times that linearly correlate with clinically reported measures of patient platelet counts and the severity of thrombocytopenia. These results suggest that specific secondary structure elements remaining in these pathological conformations of the A1 domain regulate GPIb? binding and the strength of vWF-platelet interactions, which affects the vWD functional phenotype and the severity of thrombocytopenia. PMID:25185554

  6. [Countryside obstetrics--Dr. Franz von Ottenthal and the South Tyrolean Medical Market (1860-1869)].

    PubMed

    Hilber, Marina

    2012-01-01

    The paper focuses on the structure of the obstetric market in a rural region of alpine South Tyrol (today: Italy) throughout the 1860s. Besides midwives and parturient women, also male obstetricians are traceable in the actual research area of the Tauferer Ahrntal. Among them was the general practitioner Dr. Franz von Ottenthal, whose medical records (Historiae Morborum, 1847-1899) are used to reconstruct the participation of physicians in the obstetric market. Special emphasis lies on the evaluation of the predominant hierarchies (midwives/surgeons/physicians) and the position of Franz von Ottenthal in this specialized medical sub-segment. Therefore, the quantitative extent of obstetric intervention as well as the qualitative dimension of treatments (medication, surgeries) is investigated. So far, the relevance of Ottenthals obstetric practice as to the gender ratio has been measured as rather high, considering that he generally treated more female than male patients. An attempt will be made to estimate the significance of the obstetric segment within his practice in order to find an explanatory approach for the higher female medical demand. PMID:23320378

  7. Quantitative photoacoustic tomography

    PubMed Central

    Yuan, Zhen; Jiang, Huabei

    2009-01-01

    In this paper, several algorithms that allow for quantitative photoacoustic reconstruction of tissue optical, acoustic and physiological properties are described in a finite-element method based framework. These quantitative reconstruction algorithms are compared, and the merits and limitations associated with these methods are discussed. In addition, a multispectral approach is presented for concurrent reconstructions of multiple parameters including deoxyhaemoglobin, oxyhaemoglobin and water concentrations as well as acoustic speed. Simulation and in vivo experiments are used to demonstrate the effectiveness of the reconstruction algorithms presented. PMID:19581254

  8. Alexander von Humboldt and the Origins of Landscape Archaeology.

    ERIC Educational Resources Information Center

    Mathewson, Kent

    1986-01-01

    Reviews the life, theories, and influence of Alexander von Humboldt, the early nineteenth century founder of modern geography. Maintains that Humboldt's novel approaches to the study of landscape antiquities have value for contemporary students in cultural and historical geography. (JDH)

  9. Variationen über Walther von Dyck und Dyck-Sprachen

    NASA Astrophysics Data System (ADS)

    Diekert, Volker; Lange, Klaus-Jörn

    Die Dyck-Sprachen sind ein Grundbegriff aus dem Bereich der formalen Sprachen. Ausgehend von der Person des Namensgebers werden ihre Geschichte und ihre Bedeutung in der theoretischen Informatik in diesem Überblick dargestellt.

  10. CARL VON OSSIETZKY -UNIVERSITT OLDENBURG 17. Juni 2009

    E-print Network

    Damm, Werner

    : Nico Müller und Matthias Runge Stud.IP Für VeranstaltungsadministratorInnen #12;Carl von Ossietzky ­ Universität Oldenburg Seite 2 Inhaltsverzeichnis STUD.IP - EINF�HRUNG. ............................................................................................................ 25 STUD.IP SUPPORT

  11. Gedanken uber das Hohlengleichnis von Plato Eine Weihnachtsvorlesung

    E-print Network

    Dürr, Detlef

    Gedanken ¨uber das H¨ohlengleichnis von Plato Eine Weihnachtsvorlesung Detlef D¨urr Mathematisches? Wir lesen das Gleichnis durch und finden gleich anschließend Platos ei- gene Erkl¨arung:" ...Die Welt

  12. SPA-LEED Untersuchung von Eisenoxidschichten auf 29. September 2010

    E-print Network

    Osnabrück, Universität

    SPA-LEED Untersuchung von Eisenoxidschichten auf Ag(001) 29. September 2010 Masterarbeit vorgelegt Elektronen (LEED) . . . . . . . . . . . . . . 9 2.1.3 Analyse des Spotproles bei Beugung langsamer Elektronen (SPA- LEED) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.2 Materialsystem

  13. Quantum theory and geometry: sixty years after von Neumann

    NASA Astrophysics Data System (ADS)

    Varadarajan, V. S.

    1993-10-01

    This paper is a brief review of some of the developments in the mathematical foundations of quantum mechanics that have taken place since the publication in 1932 of John von Neumann's celebrated treatise Mathematische Grundlagen der Quantenmechanik.

  14. 65-jähriges Jubiläum von Ludwig Karni?ar

    E-print Network

    Kocher, Gernot

    2014-11-01

    Südosteuropäische Geschichte, begleitet von Studien- aufenthalten in Moskau, Ljubljana und Zadar. Auf die Promotion 1979 folgte fast unmittelbar die Integration in die univer- sitäre Lehre und dann in den Wissenschaftsbetrieb mit der Habilitation. Die Dissertation...

  15. Dr. Wernher Von Braun examines a ruby crystal.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun (right), director of the Marshall Space Flight Center, and Dr. Eberhard Rees (left), deputy director, technical, examine a ruby crystal used in laser experiments in the Marshall Center's Space Sciences Laboratory.

  16. Director von Braun Presents General Medaris With Golf Bag

    NASA Technical Reports Server (NTRS)

    1959-01-01

    Marshall Space Flight Center Director Wernher von Braun presents General J.B. Medaris with a new golf bag. General Medaris, (left) was a Commander of the Army Ballistic Missile Agency (ABMA) in Redstone Arsenal, Alabama during 1955 to 1958.

  17. 1. Historic American Buildings Survey David von Riesen, Photographer July ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey David von Riesen, Photographer July 1965 BARRACKS (West), Left - BARRACKS (East), Right (Combined into New Barn) - Fort Larned, Barracks (East), Larned, Pawnee County, KS

  18. A von Neumann theorem for uniformly distributed sequences of partitions

    E-print Network

    Ingrid Carbone; Aljosa Volcic

    2009-01-16

    In this paper we consider permutations of sequences of partitions, obtaining a result which parallels von Neumann's theorem on permutations of dense sequences and uniformly distributed sequences of points.

  19. 1. Historic American Buildings Survey David von Riesen, Photographer July ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey David von Riesen, Photographer July 1965 BARRACKS (West), Left - BARRACKS (East), Right (Combined into New Barn) - Fort Larned, Barracks (West), Larned, Pawnee County, KS

  20. 33. HISTORIC VIEW OF WERNHER VON BRAUN LOOKS THROUGH THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    33. HISTORIC VIEW OF WERNHER VON BRAUN LOOKS THROUGH THE PERISCOPE FROM THE CONTROL ROOM AT TEST STAND NO. 1, PEENEMUENDE. - Marshall Space Flight Center, Redstone Rocket (Missile) Test Stand, Dodd Road, Huntsville, Madison County, AL

  1. ,,START-UP BRACHFLCHE" Arbeitshilfe zur Erarbeitung von Projektplnen

    E-print Network

    Cirpka, Olaf Arie

    ,,START-UP BRACHFLÄCHE" Arbeitshilfe zur Erarbeitung von Projektplänen #12;#12;,,START-UP Preuß Volker Schrenk Kai Steffens Karolin Weber Stuttgart, April 2005 #12;START-UP-BRACHFLÄCHE Impressum;START-UP-BRACHFLÄCHE 3 Inhalt Abbildungsverzeichnis

  2. Critical Quantitative Inquiry in Context

    ERIC Educational Resources Information Center

    Stage, Frances K.; Wells, Ryan S.

    2014-01-01

    This chapter briefly traces the development of the concept of critical quantitative inquiry, provides an expanded conceptualization of the tasks of critical quantitative research, offers theoretical explanation and justification for critical research using quantitative methods, and previews the work of quantitative criticalists presented in this…

  3. Dr. Wernher von Braun and Associates With Saturn 1

    NASA Technical Reports Server (NTRS)

    1961-01-01

    Pictured in front of the Saturn 1 launch vehicle are (L to R): Dr. Rocco Petrone, Director of Launch Operations at Kennedy Space Center; Dr. Werher von Braun, Director of Marshall Space Flight Center; Dr. Oswald Lange, Director of the Saturn Systems Office; Mr. Hans. H. Maus, Director of Fabrication and Assembly Engineering Division; and Dr. Hans Gruene, Deputy Director of Launch Operations Directorate. Maus and Gruene were original members of von Braun's rocket team.

  4. Von Donuts und Zucker: Mit Neutronen biologische Makromoleküle erforschen

    NASA Astrophysics Data System (ADS)

    May, Roland P.

    2003-05-01

    Für die Erforschung von Biomolekülen bieten Neutronen einzigartige Eigenschaften. Vor allem ihre unterschiedliche Wechselwirkung mit dem natürlichen Wasserstoff und seinem schweren Isotop Deuterium ermöglicht tiefe Einblicke in Struktur, Funktion und Dynamik von Proteinen, Nukleinsäuren und Biomembranen. Bei vielen Fragestellungen zur Strukturaufklärung gibt es kaum oder keine Alternative zum Neutron. Das Institut Laue-Langevin trägt Bahnbrechendes zum Erfolg der Neutronen-Methoden in der Biologie bei.

  5. A detailed proof of the von Neumann's Quantum Ergodic Theorem

    E-print Network

    Artur O. Lopes; Marcos Sebastiani

    2015-07-09

    We present a simplified proof of the von Neumann's Quantum Ergodic Theorem. This important result was initially published in german by J. von Neumann in 1929. We are interested here in the time evolution $\\psi_t$, $t\\geq 0$, (for large times) under the Schrodinger equation associated to a given fixed Hamiltonian $H : \\mathcal{H} \\to \\mathcal{H}$ and a general initial condition $\\psi_0$. The dimension of the Hilbert space $\\mathcal{H}$ is finite.

  6. Quantitative Decision Making.

    ERIC Educational Resources Information Center

    Baldwin, Grover H.

    The use of quantitative decision making tools provides the decision maker with a range of alternatives among which to decide, permits acceptance and use of the optimal solution, and decreases risk. Training line administrators in the use of these tools can help school business officials obtain reliable information upon which to base district…

  7. Leadership In Quantitative Excellence

    E-print Network

    Frey, Robert J.

    Darnell, Managing Director, GMO Eric Wepsic, Managing Director, DE Shaw #12;Presents Leadership for the development, trading, risk management, and marketing of quantitative long-short, long-only, and overlay focus is the process by which capital markets incorporate information about future cash flows and risks

  8. Quantitative Simulation Games

    NASA Astrophysics Data System (ADS)

    ?erný, Pavol; Henzinger, Thomas A.; Radhakrishna, Arjun

    While a boolean notion of correctness is given by a preorder on systems and properties, a quantitative notion of correctness is defined by a distance function on systems and properties, where the distance between a system and a property provides a measure of "fit" or "desirability." In this article, we explore several ways how the simulation preorder can be generalized to a distance function. This is done by equipping the classical simulation game between a system and a property with quantitative objectives. In particular, for systems that satisfy a property, a quantitative simulation game can measure the "robustness" of the satisfaction, that is, how much the system can deviate from its nominal behavior while still satisfying the property. For systems that violate a property, a quantitative simulation game can measure the "seriousness" of the violation, that is, how much the property has to be modified so that it is satisfied by the system. These distances can be computed in polynomial time, since the computation reduces to the value problem in limit average games with constant weights. Finally, we demonstrate how the robustness distance can be used to measure how many transmission errors are tolerated by error correcting codes.

  9. Struktur und Implementierung von Programmiersprachen I13. Juli 2006 10/1 LastDefAnalyse (Reaching Definitions)

    E-print Network

    Passau, Universität

    Struktur und Implementierung von Programmiersprachen I13. Juli 2006 10/1 LastDefAnalyse (Reaching, an denen der letzte Wert entstanden sein kann. Kriterien: Die Programmstelle muss den Wert von v ändern. Auf jedem Kontrollpfad von der Stelle zur betrachteten Benutzung von v darf der Wert von v nicht

  10. Struktur und Implementierung von Programmiersprachen I1. Juni 2006 5/1 Prinzip: Entwicklung des Parsebaums bottomup, von links nach rechts (Abb. 2.52)

    E-print Network

    Passau, Universität

    Struktur und Implementierung von Programmiersprachen I1. Juni 2006 5/1 LRParsing Prinzip: Entwicklung des Parsebaums bottomup, von links nach rechts (Abb. 2.52) Parserkonfiguration: 1.Stack: enthält abwechselnd Zustand sk und Grammatiksymbol Xk+1 Zustand: Positionen in einer Menge von rechten Seiten

  11. Linking contemporary high resolution magnetic resonance imaging to the von Economo legacy: A study on the comparison of MRI cortical thickness and histological measurements of cortical structure.

    PubMed

    Scholtens, Lianne H; de Reus, Marcel A; van den Heuvel, Martijn P

    2015-08-01

    The cerebral cortex is a distinctive part of the mammalian nervous system, displaying a spatial variety in cyto-, chemico-, and myelinoarchitecture. As part of a rich history of histological findings, pioneering anatomists von Economo and Koskinas provided detailed mappings on the cellular structure of the human cortex, reporting on quantitative aspects of cytoarchitecture of cortical areas. Current day investigations into the structure of human cortex have embraced technological advances in Magnetic Resonance Imaging (MRI) to assess macroscale thickness and organization of the cortical mantle in vivo. However, direct comparisons between current day MRI estimates and the quantitative measurements of early anatomists have been limited. Here, we report on a simple, but nevertheless important cross-analysis between the histological reports of von Economo and Koskinas on variation in thickness of the cortical mantle and MRI derived measurements of cortical thickness. We translated the von Economo cortical atlas to a subdivision of the commonly used Desikan-Killiany atlas (as part of the FreeSurfer Software package and a commonly used parcellation atlas in studies examining MRI cortical thickness). Next, values of "width of the cortical mantle" as provided by the measurements of von Economo and Koskinas were correlated to cortical thickness measurements derived from high-resolution anatomical MRI T1 data of 200+ subjects of the Human Connectome Project (HCP). Cross-correlation revealed a significant association between group-averaged MRI measurements of cortical thickness and histological recordings (r?=?0.54, P?von Economo parcellation atlas on the standardized Colin27 brain dataset and applied the obtained three-dimensional von Economo segmentation atlas to the T1 data of each of the HCP subjects. Highly consistent with our findings for the mapping to the Desikan-Killiany regions, cross-correlation between in vivo MRI cortical thickness and von Economo histology-derived values of cortical mantle width revealed a strong positive association (r?=?0.62, P?

  12. Variabilität des Reviergesangs des Buchfinken (Fringilla coelebs) zur Raum-Zeit-Beschreibung von Metapopulationen

    NASA Astrophysics Data System (ADS)

    Nolte, Björn

    2003-10-01

    Der Buchfinkengesang wurde in Potsdam in zwei Hauptpopulationen über drei Jahre aufgenommen. Jedes Individuum wurde eindeutig am individuellen Strophentypenrepertoire identifiziert. Ein weiterer Punkt der die individuelle Wiedererkennung bestätigt ist die hohe Standorttreue der adulten Männchen. Die beschriebene Methode eignet sich für die Untersuchung von gesamten Populationen, um den Wandel des Gesangs von Populationen in Raum und Zeit zu beschreiben. Die Haupterkenntnisse der Arbeit sind: - Die Gesamtanzahl der Grundstrophentypen innerhalb einer Population bleibt über Jahre konstant. - Die relative Häufigkeit jedes einzelnen Strophentyps variiert von Jahr zu Jahr und von Population zu Population. - Gesangslernen erfolgt exakt mit einem Korrektheitsgrad von mindestens 96%. - Das Song-Sharing ist innerhalb der Population hoch. Die diskutierten Mechanismen für das Song-Sharing sind: Die Lebenserwartung, das Zugverhalten, das Lernverhalten, die Etabliertheit von Strophentypen, Weibchenpräferenzen und die Reaktionen der territorialen Männchen. - Weiterhin wurde ein Modell zur kulturellen Evolution des Buchfinkengesangs programmiert, um die Rolle der Einflussfaktoren, wie Fehlerquote, Abwanderungsrate und Laufzeit zu ermitteln. Der Wandel des Dialektes erfolgt graduell in Raum und Zeit. Daher sind keine scharfen Dialektgrenzen anzutreffen. Trotz dieser Tatsache markieren die etablierten Strophentypen die Population. 50 % der Juvenilen siedeln am Geburtsort, auf diese Weise bleibt der Dialekt erhalten und Inzest wird vermieden. -Analysiert man das Repertoire benachbarten Männchen bei isolierten Alleen, so entspricht die Gesangsangleichung in etwa dem Zufall. -Intraindividuelle Vergleiche der quantitativen Parameter des jeweiligen Strophentyps wurden saisonal und annuell durchgeführt. Saisonal konnten für einen Strophentyp ein Trend ermittelt werden. Bei jährlichen Vergleichen konnten intraindividuell ausschließlich nicht signifikante Ergebnisse ermittelt werden, wohingegen die interindividuelle Variation in zwei Fällen signifikant war. In einem Fall bestand ein Trend und in einem weiteren Fall war die Variationsunterschiede nicht signifikant. - Der Verlauf der Brutsaison lässt sich an der jährlichen Gesangsaktivität nachvollziehen. Chaffinch song was recorded in Potsdam in two major populations of chaffinches over a period of three years. Each male was identified unambiguously because of their individual song type repertoires. These are usually easy to distinguish from sonagrams as the variation is discontinuous. A further point for individual recognition is the fixed territorial behaviour of adult males. The described method is employed to examine whole populations and to observe changes with space and time in the song of a population. The major findings of the study are: - The total amount of basic song types in each population is constant over years. - The quantity of each basic song type is different and varies from year to year and from population to population. - Song copying is extremely accurate on at least 96% of occasions. - Song-type sharing is high within populations. Discussed mechanisms for song neighbourhoods are: expectation of life, semi-migratory behaviour, learning skills, establishment of song types, female choice and male vs male interaction. Furthermore a model of cultural evolution of chaffinch song was programmed to determine the role of factors like error rate, rate of emigration and running time. The changes are gradual in space and time. Hence the dialect borders are smooth. Despite this fact established song types mark the population. As every second juvenile bird settles in the population of his birth inbreeding is avoided and the dialect structure is retained. - Analysing the repertoires of neighbouring males (“next door neighbours”) in isolated avenues to examine mutual influences suggests that these have the same amount of song types in common than would be expected by chance. - Within intraindividual comparisons the quantitative parameters of the same son

  13. Topics in Koopman-von Neumann Theory

    E-print Network

    D. Mauro

    2003-01-30

    In this thesis we study several features of the operatorial approach to classical mechanics pionereed by Koopman and von Neumann (KvN) in the Thirties. In particular in the first part we study the role of the phases of the KvN states. We analyze, within the KvN theory, the two-slit experiment and the Aharonov-Bohm effect and we make a comparison between the classical and the quantum case. In the second part of the thesis we study the extension of the KvN formalism to the space of forms and Jacobi fields. We first show that all the standard Cartan calculus on symplectic spaces can be performed via Grassmann variables or via suitable combinations of Pauli matrices. Second we study the extended Hilbert space of KvN which now includes forms and prove that it is impossible to have at the same time a positive definite scalar product and a unitary evolution. Clear physical reasons for this phenomenon are exhibited. We conclude the thesis with some work in progress on the issue of quantization.

  14. [Carl Friedrich von Weizsäcker - physicist and philosopher].

    PubMed

    Drieschner, Michael

    2014-01-01

    The subject of this paper is the philosopher Carl Friedrich von weizsäcker, especially under the aspect of the relation between physics and philosophy in his works. The decisive role of time in physics as well as in philosophy is described, and thereof is derived the comprehension of probability as a predicted relative frequency. Consequently quantum mechanics is interpreted as a theory of probability that uses "quantum logic" instead of classical propositional logic that is used in "normal" probability. The philosophical fruit of that is the interpretation of potentiality as the modality of the future. Weizsäcker's proposals for a justification of physics a priori are dealt with as well as his approach to a theory of "ur-objects", which are atoms in the strictest sense: q-bits.--Questions of Weizsäcker's personality are addressed: His role in the development of the nuclear reactor and atomic bomb in Nazi time, his enthusiasm and his religiousness as well as his efforts towards world peace. PMID:24974618

  15. Unexpected reemergence of the von Neumann theorem

    NASA Astrophysics Data System (ADS)

    ?ukowski, Marek

    2009-02-01

    It is shown here that the “simple test of quantumness for a single system” of Alicki and Van Ryn has exactly the same relation to the discussion of the problem of describing the quantum system via a classical probabilistic scheme (that is in terms of hidden variables or within a realistic theory) as the von Neumann theorem [Mathematische Grundlagen der Quantenmechanik (Springer, Berlin, 1932); Mathematical Foundations of Quantum Mechanics (Princeton University, Princeton, NJ, 1955)]. The latter one was shown by Bell [Rev. Mod. Phys. 38, 447 (1966)] to stem from an assumption that the hidden variable values for a sum of two noncommuting observables have to be, for each individual system, equal to sums of eigenvalues of the two operators. One cannot find a justification for such an assumption to hold for noncommeasurable variables. On the positive side, the criterion may be useful in rejecting models which are based on stochastic classical fields. Nevertheless, the example used by the authors has a classical optical realization.

  16. Quantitative sensory testing.

    PubMed

    Soomekh, David

    2006-07-01

    The diagnosis and treatment of peripheral neuropathy from any cause has come to the forefront of the research community in the past few years. Both past and new diagnostic and treatment options have been and are being studied to better understand and properly treat this debilitating and sometimes devastating disease. One such advancement is the clinical use of quantitative sensory testing. To identify etiology of the neuropathy early, the testing instrument would need to identify changes throughout the course of the disease, have a normative database, and show a clear distinction between the absence or presence of disease. The pressure specified sensory device (PSSD) was developed in 1992 to painlessly investigate the cutaneous pressure thresholds quantitatively and accurately. PMID:16958387

  17. Berkeley Quantitative Genome Browser

    Energy Science and Technology Software Center (ESTSC)

    2008-02-29

    The Berkeley Quantitative Genome Browser provides graphical browsing functionality for genomic data organized, at a minimum, by sequence and position. While supporting the annotation browsing features typical of many other genomic browsers, additional emphasis is placed on viewing and utilizing quantitative data. Data may be read from GFF, SGR, FASTA or any column delimited format. Once the data has been read into the browser's buffer, it may be searched. filtered or subjected to mathematical transformation.more »The browser also supplies some graphical design manipulation functionality geared towards preparing figures for presentations or publication. A plug-in mechanism enables development outside the core functionality that adds more advanced or esoteric analysis capabilities. BBrowse's development and distribution is open-source and has been built to run on Linux, OSX and MS Windows operating systems.« less

  18. Quantitative criteria for insomnia.

    PubMed

    Lichstein, K L; Durrence, H H; Taylor, D J; Bush, A J; Riedel, B W

    2003-04-01

    Formal diagnostic systems (DSM-IV, ICSD, and ICD-10) do not provide adequate quantitative criteria to diagnose insomnia. This may not present a serious problem in clinical settings where extensive interviews determine the need for clinical management. However, lack of standard criteria introduce disruptive variability into the insomnia research domain. The present study reviewed two decades of psychology clinical trials for insomnia to determine common practice with regard to frequency, severity, and duration criteria for insomnia. Modal patterns established frequency (> or =3 nights a week) and duration (> or =6 months) standard criteria. We then applied four versions of severity criteria to a random sample and used sensitivity-specificity analyses to identify the most valid criterion. We found that severity of sleep onset latency or wake time after sleep onset of: (a) > or =31 min; (b) occurring > or =3 nights a week; (c) for > or =6 months are the most defensible quantitative criteria for insomnia. PMID:12643966

  19. Energy & Climate: Getting Quantitative

    NASA Astrophysics Data System (ADS)

    Wolfson, Richard

    2011-11-01

    A noted environmentalist claims that buying an SUV instead of a regular car is energetically equivalent to leaving your refrigerator door open for seven years. A fossil-fuel apologist argues that solar energy is a pie-in-the-sky dream promulgated by na"ive environmentalists, because there's nowhere near enough solar energy to meet humankind's energy demand. A group advocating shutdown of the Vermont Yankee nuclear plant claims that 70% of its electrical energy is lost in transmission lines. Around the world, thousands agitate for climate action, under the numerical banner ``350.'' Neither the environmentalist, the fossil-fuel apologist, the antinuclear activists, nor most of those marching under the ``350'' banner can back up their assertions with quantitative arguments. Yet questions about energy and its environmental impacts almost always require quantitative answers. Physics can help! This poster gives some cogent examples, based on the newly published 2^nd edition of the author's textbook Energy, Environment, and Climate.

  20. Primary enzyme quantitation

    DOEpatents

    Saunders, G.C.

    1982-03-04

    The disclosure relates to the quantitation of a primary enzyme concentration by utilizing a substrate for the primary enzyme labeled with a second enzyme which is an indicator enzyme. Enzyme catalysis of the substrate occurs and results in release of the indicator enzyme in an amount directly proportional to the amount of primary enzyme present. By quantifying the free indicator enzyme one determines the amount of primary enzyme present.

  1. 78 FR 34090 - Lois Von Morganroth; Shiloh Warm Springs Ranch, LLC; Notice of Application for Transfer of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-06

    ...Commission [Project No. 8498-018] Lois Von Morganroth; Shiloh Warm Springs Ranch...Motions To Intervene On April 29, 2013, Lois Von Morganroth (transferor) and Shiloh Warm...Applicants' Contact: For Transferor: Ms. Lois Von Morganroth, 1223 Montana Avenue,...

  2. Computational vaccinology: quantitative approaches.

    PubMed

    Flower, Darren R; McSparron, Helen; Blythe, Martin J; Zygouri, Christianna; Taylor, Debra; Guan, Pingping; Wan, Shouzhan; Coveney, Peter V; Walshe, Valerie; Borrow, Persephone; Doytchinova, Irini A

    2003-01-01

    The immune system is hierarchical and has many levels, exhibiting much emergent behaviour. However, at its heart are molecular recognition events that are indistinguishable from other types of biomacromolecular interaction. These can be addressed well by quantitative experimental and theoretical biophysical techniques, and particularly by methods from drug design. We review here our approach to computational immunovaccinology. In particular, we describe the JenPep database and two new techniques for T cell epitope prediction. One is based on quantitative structure-activity relationships (a 3D-QSAR method based on CoMSIA and another 2D method based on the Free-Wilson approach) and the other on atomistic molecular dynamic simulations using high performance computing. JenPep (http://www.jenner.ar.uk/ JenPep) is a relational database system supporting quantitative data on peptide binding to major histocompatibility complexes, TAP transporters, TCR-pMHC complexes, and an annotated list of B cell and T cell epitopes. Our 2D-QSAR method factors the contribution to peptide binding from individual amino acids as well as 1-2 and 1-3 residue interactions. In the 3D-QSAR approach, the influence of five physicochemical properties (volume, electrostatic potential, hydrophobicity, hydrogen-bond donor and acceptor abilities) on peptide affinity were considered. Both methods are exemplified through their application to the well-studied problem of peptide binding to the human class I MHC molecule HLA-A*0201. PMID:14712934

  3. Locally Compact Quantum Groups. A von Neumann Algebra Approach

    NASA Astrophysics Data System (ADS)

    Van Daele, Alfons

    2014-08-01

    In this paper, we give an alternative approach to the theory of locally compact quantum groups, as developed by Kustermans and Vaes. We start with a von Neumann algebra and a comultiplication on this von Neumann algebra. We assume that there exist faithful left and right Haar weights. Then we develop the theory within this von Neumann algebra setting. In [Math. Scand. 92 (2003), 68-92] locally compact quantum groups are also studied in the von Neumann algebraic context. This approach is independent of the original C^*-algebraic approach in the sense that the earlier results are not used. However, this paper is not really independent because for many proofs, the reader is referred to the original paper where the C^*-version is developed. In this paper, we give a completely self-contained approach. Moreover, at various points, we do things differently. We have a different treatment of the antipode. It is similar to the original treatment in [Ann. Sci. & #201;cole Norm. Sup. (4) 33 (2000), 837-934]. But together with the fact that we work in the von Neumann algebra framework, it allows us to use an idea from [Rev. Roumaine Math. Pures Appl. 21 (1976), 1411-1449] to obtain the uniqueness of the Haar weights in an early stage. We take advantage of this fact when deriving the other main results in the theory. We also give a slightly different approach to duality. Finally, we collect, in a systematic way, several important formulas. In an appendix, we indicate very briefly how the C^*-approach and the von Neumann algebra approach eventually yield the same objects. The passage from the von Neumann algebra setting to the C^*-algebra setting is more or less standard. For the other direction, we use a new method. It is based on the observation that the Haar weights on the C^*-algebra extend to weights on the double dual with central support and that all these supports are the same. Of course, we get the von Neumann algebra by cutting down the double dual with this unique support projection in the center. All together, we see that there are many advantages when we develop the theory of locally compact quantum groups in the von Neumann algebra framework, rather than in the C^*-algebra framework. It is not only simpler, the theory of weights on von Neumann algebras is better known and one needs very little to go from the C^*-algebras to the von Neumann algebras. Moreover, in many cases when constructing examples, the von Neumann algebra with the coproduct is constructed from the very beginning and the Haar weights are constructed as weights on this von Neumann algebra (using left Hilbert algebra theory). This paper is written in a concise way. In many cases, only indications for the proofs of the results are given. This information should be enough to see that these results are correct. We will give more details in forthcoming paper, which will be expository, aimed at non-specialists. See also [Bull. Kerala Math. Assoc. (2005), 153-177] for an 'expanded' version of the appendix.

  4. Modulhandbuch Bachelor-Studiengnge Informatik, Angewandte Informatik

    E-print Network

    Morik, Katharina

    -trans- und optischer Isomerie, trans-Effekt, FlieÃ?schema zur Bestimmung von Punktgruppen), 3. Die chemische Anionentrennungsgang) nach Jander Blasius, Charakteristische chemische Reaktionen der Ã?bergangsmetalle und

  5. Entwicklungsperspektiven von Social Software und dem Web 2.0

    NASA Astrophysics Data System (ADS)

    Raabe, Alexander

    Der Artikel beschäftigt sich zunächst mit dem derzeitigen und zukünftigen Einsatz von Social Software in Unternehmen. Nach dem großen Erfolg von Social Software im Web beginnen viele Unternehmen eigene Social Software-Initiativen zu entwickeln. Der Artikel zeigt die derzeit wahrgenommenen Einsatzmöglichkeiten von Social Software im Unternehmen auf, erörtert Erfolgsfaktoren für die Einführung und präsentiert mögliche Wege für die Zukunft. Nach der Diskussion des Spezialfalles Social Software in Unternehmen werden anschließend die globalen Trends und Zukunftsperspektiven des Web 2.0 in ihren technischen, wirtschaftlichen und sozialen Dimensionen dargestellt. Wie aus den besprochenen Haupttrends hervorgeht, wird die Masse an digital im Web verfügbaren Informationen stetig weiterwachsen. So stellt sich die Frage, wie es in Zukunft möglich sein wird, die Qualität der Informationssuche und der Wissensgenerierung zu verbessern. Mit dem Einsatz von semantischen Technologien im Web wird hier eine revolutionäre Möglichkeit geboten, Informationen zu filtern und intelligente, gewissermaßen verstehende" Anwendungen zu entwerfen. Auf dem Weg zu einem intelligenten Web werden sich das Semantic Web und Social Software annähern: Anwendungen wie Semantic Wikis, Semantic Weblogs, lightweight Semantic Web-Sprachen wie Microformats oder auch kommerzielle Angebote wie Freebase von Metaweb werden die ersten Vorzeichen einer dritten Generation des Webs sein.

  6. Changes in von Willebrand factor level and von Willebrand activity with age in type 1 von Willebrand disease

    PubMed Central

    Rydz, Natalia; Grabell, Julie; Lillicrap, David; James, Paula D.

    2015-01-01

    In a normal population, VWF plasma levels (VWF:Ag) and VWF activity (VWF:RCo) increase by approximately 0.17 and 0.15 IU/ml per decade, but the influence of age is unknown in patients with type 1 von Willebrand disease (VWD). In a retrospective cohort study, the medical records of 31 type 1 VWD patients over the age of 30, who had been followed for ?5 years, were reviewed for baseline clinical data and previously performed VWF:Ag, VWF:RCo and factor VIII levels (FVIII:C). VWF multimer analysis was normal in 27/31 cases performed. Mean bleeding score was 9.4 (range 2-21). Mean age at diagnosis was 33 (range 16-60 years), and duration of follow-up ranged from 5-26 years (mean 11 years). Patients had 2-10 time points of VWD testing (mean of 5.2). The mean VWF:Ag, VWF:RCo and FVIII:C at time of diagnosis were 0.44 IU/ml 0.34 IU/ml and 0.75 IU/ml. At last follow-up, the mean VWF:Ag, VWF:RCo and FVIII:C were significantly increased to 0.71 IU/L, 0.56 IU/ml and 0.90 IU/ml (p=<0.001, <0.001, and 0.0081, respectively). 18/31 patients had VWF:Ag, VWF:RCo and FVIII:C levels that increased into the normal range. The rate of change in VWF:Ag and VWF:RCo was 0.30 IU/ml (0.214-0.386, CI 95%, p<0.0001) and 0.20 IU/ml per year (0.126-0.274, CI 95%, p=0.0001). Patients with type 1 VWD experience age-related increases to VWF:Ag and VWF:RCo which can result in normalization of VWF levels. Further studies are required to determine if the bleeding phenotype resolves with the increases in VWF:Ag and VWF:RCo levels. PMID:25756206

  7. Die Wirtschaftliche Bedeutung von Cyberphysical Systems aus der Sicht Eines Global Players

    NASA Astrophysics Data System (ADS)

    Beetz, Klaus

    Langfristiges und nachhaltiges Denken ist ein wichtiger Teil unserer Tradition. Nachhaltigkeit heißt für uns, in unseren Handlungen die Belange von Ökologie, Ökonomie und sozialer Verantwortung ausgewogen zu berücksichtigen.", sagte Peter Löscher, CEO von Siemens, im Januar 2010.

  8. 78 FR 61948 - Culturally Significant Objects Imported for Exhibition Determinations: “Franz von Stuck”

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-07

    ...Significant Objects Imported for Exhibition Determinations: ``Franz von Stuck'' SUMMARY: Notice is hereby given of the following determinations...determine that the objects to be included in the exhibition ``Franz von Stuck,'' imported from abroad for temporary exhibition...

  9. 76 FR 36166 - Culturally Significant Objects Imported for Exhibition; Determinations: “Gabriel von Max: Be...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-21

    ...Objects Imported for Exhibition; Determinations: ``Gabriel von Max: Be-Tailed Cousins and Phantasms of the Soul'' SUMMARY...that the objects to be included in the exhibition ``Gabriel von Max: Be-Tailed Cousins and Phantasms of the Soul,''...

  10. An Alternative to Von Glasersfeld's Subjectivism in Science Education: Deweyan Social Constructivism.

    ERIC Educational Resources Information Center

    Garrison, Jim

    1997-01-01

    Discusses von Glasersfeld's view of constructivism in science and mathematics educational research and practice. Provides a social constructivist alternative to von Glaserfeld's subjectivist constructivism. Discusses the practical art of experimental construction and objectivity in science education. (Author/JRH)

  11. Quantitative ultrasound molecular imaging.

    PubMed

    Yeh, James Shue-Min; Sennoga, Charles A; McConnell, Ellen; Eckersley, Robert; Tang, Meng-Xing; Nourshargh, Sussan; Seddon, John M; Haskard, Dorian O; Nihoyannopoulos, Petros

    2015-09-01

    Ultrasound molecular imaging using targeting microbubbles is predominantly a semi-quantitative tool, thus limiting its potential diagnostic power and clinical applications. In the work described here, we developed a novel method for acoustic quantification of molecular expression. E-Selectin expression in the mouse heart was induced by lipopolysaccharide. Real-time ultrasound imaging of E-selectin expression in the heart was performed using E-selectin-targeting microbubbles and a clinical ultrasound scanner in contrast pulse sequencing mode at 14 MHz, with a mechanical index of 0.22-0.26. The level of E-selectin expression was quantified using a novel time-signal intensity curve analytical method based on bubble elimination, which consisted of curve-fitting the bi-exponential equation [Formula: see text] to the elimination phase of the myocardial time-signal intensity curve. Ar and Af represent the maximum signal intensities of the retained and freely circulating bubbles in the myocardium, respectively; ?r and ?f represent the elimination rate constants of the retained and freely circulating bubbles in the myocardium, respectively. Ar correlated strongly with the level of E-selectin expression (|r|>0.8), determined using reverse transcriptase real-time quantitative polymerase chain reaction, and the duration of post-lipopolysaccharide treatment-both linearly related to cell surface E-selectin protein (actual bubble target) concentration in the expression range imaged. Compared with a conventional acoustic quantification method (which used retained bubble signal intensity at 20 min post-bubble injection), this new approach exhibited greater dynamic range and sensitivity and was able to simultaneously quantify other useful characteristics (e.g., the microbubble half-life). In conclusion, quantitative determination of the level of molecular expression is feasible acoustically using a time-signal intensity curve analytical method based on bubble elimination. PMID:26044707

  12. Kohärenz in linearen Anordungen von Josephsonverbindungen mit induktiver Kopplung

    NASA Astrophysics Data System (ADS)

    Krech, W.

    Mit Hilfe von verkürzten Gleichungen für die Phasen der Spannungsoszillationen untersuchen wir das Synchronisationsverhalten einer linearen Anordnung von Josephsonverbindungen mit induktiver Kopplung. Als Beispiele dienen die Kopplung zwischen nächsten Nachbarn, die Kopplung großer Reichweite und die SQUID-Kopplung. Wir betrachten insbesondere die Ausprägung von kohärenten Moden und deren Stabilitätsverhalten, den Effekt der Gleichstromleitfähigkeit auf das phase-locking and die Toleranz der kritischen Ströme der Josephsonverbindungen.Translated AbstractCoherence in Linear Arrays of Josephson Junctions with Inductive CouplingUsing reduced equations for the phases of the voltage oscillations we investigate the synchronization in a linear array of Josephson junctions with inductive coupling. The examples under consideration are the coupling between next neighbours, the large range coupling and the SQUID coupling. Especially, we investigate the formation of coherent modes and their stability, the effect of the de conductivity on the phase locking and the tolerance of the junctions critical currents.

  13. 13 # Beispiel: Aufrufstruktur bei der indirekten Rekursion in Bei 14 # Beispiel: '' Die T urme von Hanoi``

    E-print Network

    Arndt, Holger

    ) Ergebnis: 0 0 0 0 0 0 155 14 # Beispiel: '' Die TË? urme von Hanoi`` . Gegeben sind 3 StË? abe und n Scheiben --- unter Zuhilfenahme von Stab 3 --- zu Stab 2 gebracht werden, wobei -- in einem '' Zug`` immer nur die -> 3 Zug 3: 2 -> 3 Zug 4: 1 -> 2 Zug 6: 3 -> 2 Zug 7: 1 -> 2 156 Strategie: Um n Scheiben von Stab von

  14. Quantitative spectroscopy of Deneb

    E-print Network

    Schiller, Florian

    2006-01-01

    Quantitative spectroscopy of luminous BA-type supergiants offers a high potential for modern astrophysics. The degree to which we can rely on quantitative studies of this class of stars as a whole depends on the quality of the analyses for benchmark objects. We constrain the basic atmospheric parameters and fundamental stellar parameters as well as chemical abundances of the prototype A-type supergiant Deneb to unprecedented accuracy (Teff = 8525 +/- 75 K, log(g) = 1.10 +/- 0.05 dex, M_spec = 19 +/- 3 M_sun, L = 1.96 +/- 0.32 *10^5 L_sun, R = 203 +/- 17 R_sun, enrichment with CN-processed matter) by applying a sophisticated hybrid NLTE spectrum synthesis technique which has recently been developed and tested. The study is based on a high-resolution and high-S/N spectrum obtained with the Echelle spectrograph FOCES on the Calar Alto 2.2m telescope. Practically all inconsistencies reported in earlier studies are resolved. Multiple metal ionization equilibria and numerous hydrogen lines from the Balmer, Paschen,...

  15. Quantitative spectroscopy of Deneb

    E-print Network

    Florian Schiller; Norbert Przybilla

    2007-12-01

    Quantitative spectroscopy of luminous BA-type supergiants offers a high potential for modern astrophysics. The degree to which we can rely on quantitative studies of this class of stars as a whole depends on the quality of the analyses for benchmark objects. We constrain the basic atmospheric parameters and fundamental stellar parameters as well as chemical abundances of the prototype A-type supergiant Deneb to unprecedented accuracy (Teff = 8525 +/- 75 K, log(g) = 1.10 +/- 0.05 dex, M_spec = 19 +/- 3 M_sun, L = 1.96 +/- 0.32 *10^5 L_sun, R = 203 +/- 17 R_sun, enrichment with CN-processed matter) by applying a sophisticated hybrid NLTE spectrum synthesis technique which has recently been developed and tested. The study is based on a high-resolution and high-S/N spectrum obtained with the Echelle spectrograph FOCES on the Calar Alto 2.2m telescope. Practically all inconsistencies reported in earlier studies are resolved. Multiple metal ionization equilibria and numerous hydrogen lines from the Balmer, Paschen, Brackett and Pfund series are brought into match simultaneously for the stellar parameter determination. Stellar wind properties are derived from H_alpha line-profile fitting using line-blanketed hydrodynamic non-LTE models. A self-consistent view of Deneb is thus obtained, allowing us to discuss its evolutionary state in detail by comparison with the most recent generation of evolution models for massive stars. (abridged)

  16. Modellierung von Anomalien in einer modularen Roboter-Steuerung

    NASA Astrophysics Data System (ADS)

    Kleinlützum, Kalle; Brockmann, Werner; Rosemann, Nils

    Moderne Robotersysteme werden immer komplexer und dadurch schwieriger zu entwerfen. Außerdem steigt die Wahrscheinlichkeit von Fehlern. Organic Computing versucht durch Methoden organischer Systeme wie Emergenz und Selbstorganisation gleichzeitig das Entwurfsproblem zu lösen und das autonome Reagieren auf Fehler zu erreichen, ohne den Aufwand der klassischen Fehlertoleranz zu investieren. Um auf anormale Situationen reagieren zu können, muss quasi der "Gesundheitszustand“ des Roboters erfasst werden. In diesem Beitrag wird beschrieben, wie dieser ausgehend von Sensorsignalen auf den verschiedenen Ebenen einer Steuerungshierarchie repräsentiert werden kann. Ein wesentlicher Mechanismus dazu sind "Health-Signale“. Ihre Semantik und systematische Verknüpfung werden näher erläutert und an einem einfachen Beispiel demonstriert.

  17. Henry Cavendish, Johann von Soldner, and the deflection of light

    NASA Astrophysics Data System (ADS)

    Will, Clifford M.

    1988-05-01

    The gravitational deflection of light based on Newtonian theory and the corpuscular model of light was calculated, but never published, around 1784 by Henry Cavendish, almost 20 years earlier than the first published calculation by Johann Georg von Soldner. The two results are slightly different because, while Cavendish treated a light ray emitted from infinity, von Soldner treated a light ray emitted from the surface of the gravitating body. At the first order of approximation, they agree with each other; both are one-half the value predicted by general relativity and confirmed by experiment.

  18. Non-von Recklinghausen's neurofibromatosis resembling a giant pigmented nevus.

    PubMed

    Bousema, M T; Vuzevski, V D; Oranje, A P; Heule, F; Stolz, E; van Joost, T

    1989-02-01

    We report the case of a 30-year-old female patient with non-von Recklinghausen's neurofibromatosis. In our opinion it does not fit within a system of classification recently described. Clinically, the abnormality resembled a giant pigmented nevus; however, light- and electron microscopy findings were consistent with those of a neurofibroma. No other symptoms of classic neurofibromatosis or other diseases were present. The family history showed no evidence of neurofibromatosis. To the best of our knowledge this manifestation of non-von Recklinghausen's neurofibromatosis has not been previously described. The cause and the inheritance pattern of this variant are not clear. PMID:2492569

  19. Methoden zur optischen Qualitatskontrolle Anwendung in der Produktion von Xenon-Lampen

    E-print Network

    Methoden zur optischen Qualit¨atskontrolle Anwendung in der Produktion von Xenon Arbeit werden Methoden zur optischen Qualit¨atskontrolle von Xenon- Lampen evaluiert. Die automatische-Nearest-Neighbor eingeteilt werden. Die besten Ergebnisse bei der Klassifikation von geschweißten und ungeschweißten Xenon

  20. ISSN0344-9629 GKSS ist Mitglied der Hermann von Helmholtz-

    E-print Network

    von Storch, Hans

    ISSN0344-9629 GKSS ist Mitglied der Hermann von Helmholtz- Gemeinschaft Deutscher Forschungszentren e.V. Interview with Harry van Loon Authors: H. von Storch G. Kiladis R. Madden GKSS 2005/8 #12;#12;Interview with Harry van Loon GKSS-Forschungszentrum Geesthacht GmbH · Geesthacht · 2005 Authors: H. von

  1. Die Modelldefinition von Heinrich Hertz Warum Hertz die Quantentheorie nicht erfand

    E-print Network

    Cattaneo, Marco

    Modelldefinition von Heinrich Hertz 2 1880 Promotion bei Hermann v. Helmholtz 1883 Prof. für Theor. Physik CAU KielDie Modelldefinition von Heinrich Hertz oder Warum Hertz die Quantentheorie nicht erfand ­ Universität Hamburg Hauptgebäude Geomatikum #12;Die Modelldefinition von Heinrich Hertz Einleitung Die

  2. Mixing subalgebras of finite von Neumann algebras Jan Cameron Junsheng Fang Kunal Mukherjee

    E-print Network

    Kerr, David

    24, 2009 #12;Weak mixing Theorem (Koopman-von Neumann 1932, etc) An invertible measure(A)µ(B) = 0, A, B B. #12;Weak mixing Theorem (Koopman-von Neumann 1932, etc) An invertible measure Theorem (Koopman-von Neumann 1932, etc) An invertible measure-preserving transformation T on a probability

  3. Dr.Ing. G. Reiig Otto-von-Guericke-Universitat Magdeburg

    E-print Network

    Reissig, Gunther

    Dr.­Ing. G. Reißig Otto-von-Guericke-Universit¨at Magdeburg Institut f¨ur Automatisierungstechnik von uns betrachteten, [7] enth¨alt ein Kapi- tel ¨uber strukturelle Diagnosemethoden, und [8] analysiert generische Eigenschaften von Modellen aus dem Bereich der linearen elektrischen Netzwerke und der

  4. Collocation methods for the solution of von-Karman dynamic non-linear plate systems

    E-print Network

    Yosibash, Zohar

    Collocation methods for the solution of von-Karman dynamic non-linear plate systems Z. Yosibash a,1-plane equations) as presented in (loc. cit). Ó 2004 Elsevier Inc. All rights reserved. Keywords: von-Karman plate The von-Karman plate model is aimed at approximating the elasticity system over a three-dimensional plate

  5. Global Stabilization of a Dynamic von K arm an Plate With Nonlinear Boundary Feedback

    E-print Network

    Global Stabilization of a Dynamic von K arm an Plate With Nonlinear Boundary Feedback Mary Ann Horn We consider a fully nonlinear von Karman system with, in addition to the nonlinearity which appears consider the following von Karman system in the variables w(t;x) and (w(t;x)) with nonlinear feedback

  6. Satzung zur Ergnzung von Regelungen zu Prfungsteilleistungen und Praktikumsvoraussetzungen fr die Bildungswissenschaften

    E-print Network

    Greifswald, Ernst-Moritz-Arndt-Universität

    1 Satzung zur Ergänzung von Regelungen zu Prüfungsteilleistungen und Praktikumsvoraussetzungen für Ernst-Moritz-Arndt-Universität Greifswald Vom 2. September 2014 Aufgrund von § 2 Absatz 1 in Verbindung. Grundfragen von Bildung und Erziehung 1 270 9 2. Schulpädagogik 1 180 6 3. Pädagogische Psychologie 2 180 6 4

  7. 1/2012 Forschen und Wissen 39 In der Arbeitsgemeinschaft von Pro-

    E-print Network

    Manstein, Dietmar J.

    1/2012 Forschen und Wissen 39 In der Arbeitsgemeinschaft von Pro- fessorin Dr. Ulrike Raap aus der Assisten- tin Manuela Gehring erhielt ein Rei- sestipendium in Höhe von 600 Euro zur Teilnahme am adäquaten Rekonstruktion von Gesichtsschädeldefekten". Dieses Projekt wird in Kooperation mit dem

  8. Weisung zum Verkauf von ausgemustertem Material der Pdagogi-schen Hochschule Zrich1

    E-print Network

    Steiner, Daniel

    Seite 1/4 PH-Nr. 4.8 Weisung zum Verkauf von ausgemustertem Material der Pädagogi- schen Hochschule Pädagogischen Hochschule Zürich (PHZH) ist periodisch eine Ausmusterung von Material notwendig. Namentlich sind1 a) die Flotte von Informatik- und Audio-Video-Geräten sowie entsprechendes Zubehör aufgrund der

  9. Erste Satzung zur nderung der Ordnung ber die Erhebung von Gebhren

    E-print Network

    Greifswald, Ernst-Moritz-Arndt-Universität

    1 Erste Satzung zur Änderung der Ordnung über die Erhebung von Gebühren an der Ernst-Moritz-Arndt-Universität Greifswald (Universitätsgebührenordnung) vom 24.04.2006 Aufgrund von § 16 Abs. 5 des Landeshochschulgesetzes geändert: Die Anlage zur Ordnung über die Erhebung von Gebühren an der Ernst-Moritz-Arndt- Universität

  10. Vierte Satzung zur nderung der Ordnung ber die Erhebung von Gebhren

    E-print Network

    Greifswald, Ernst-Moritz-Arndt-Universität

    1 Vierte Satzung zur Änderung der Ordnung über die Erhebung von Gebühren an der Ernst-Moritz-Arndt-Universität Greifswald (Universitätsgebührenordnung) vom 30. Mai 2007 Aufgrund von § 16 Abs. 5 des Gesetzes über die Anlage zur Ordnung über die Erhebung von Gebühren an der Ernst-Moritz-Arndt- Universität Greifswald wird

  11. 25.04.2001 Amtliche Mitteilungen / 20. Jahrgang Seite 24 Satzung der Carl von Ossietzky

    E-print Network

    Damm, Werner

    25.04.2001 Amtliche Mitteilungen / 20. Jahrgang Seite 24 24 Satzung der Carl von Ossietzky Hochschulgesetzes vom 11. Oktober 2000, hat der Senat der Carl von Ossietzky Universität Oldenburg am 28.02.2001 die in der Anlage abgedruckte Satzung beschlossen. - Amtliche Mitteilungen der Carl von Ossietzky Universität

  12. TCP VON: Joint Congestion Control and Online Network Coding for Wireless Networks

    E-print Network

    Wong, Vincent

    TCP VON: Joint Congestion Control and Online Network Coding for Wireless Networks Wei Bao, Vahid}@ece.ubc.ca Abstract--In this paper, we propose TCP Vegas with online network coding (TCP VON), which incorporates by generation. Thus, online network coding incurs a low decoding delay. In TCP VON, the sender transmits

  13. Addition von Drehimpulsen 63 Grobuchstaben sind den Gesamtdrehlmpulsen eines Mehrteilchensystems vorbe-

    E-print Network

    Koch, Christiane

    Addition von Drehimpulsen 63 Großbuchstaben sind den Gesamtdrehlmpulsen eines Mehrteilchensystems vorbe- halten - und der linke obere Index wird einfach weggelassen. Für die ersten Wer- te von i ist > im Unterraum 8, (ai1 i2) eine orthonormierte Basis. Von der einen gelangt man zur anderen durch eine

  14. "Good vibrations" im Nanobereich: Die Nachwuchsgruppe Theorie wird fr drei weitere Jahre von der DFG finanziert

    E-print Network

    Pfeifer, Holger

    "Good vibrations" im Nanobereich: Die Nachwuchsgruppe Theorie wird für drei weitere Jahre von der von Dr. David M. Benoit entwickelt die Nachwuchsgruppe neue theoretische Methoden um die Vibrationsdynamik von Molekülen auf der Nanoskala zu beschreiben. Die Art und Weise wie ein Molekül vibriert

  15. Load Balanced Birkho -von Neumann Switches, Part II: Multi-stage Bu ering

    E-print Network

    Chang, Cheng-Shang

    Load Balanced Birkho#11;-von Neumann Switches, Part II: Multi-stage Bu#11;ering Cheng-Shang Chang-of-sequence problem that occurs in the load balanced Birkho#11;-von Neumann switch with one-stage bu#11;ering. We do Science 29 August 2001 #12; 1 Introduction In Part I [5], we proposed the load balanced Birkho#11;-von

  16. Struktur und Implementierung von Programmiersprachen I4. Mai 2006 2/1 Hllenalgorithmen fr Scanner

    E-print Network

    Passau, Universität

    Struktur und Implementierung von Programmiersprachen I4. Mai 2006 2/1 Hüllenalgorithmen für eines erkennenden Automaten #12;Struktur und Implementierung von Programmiersprachen I4. Mai 2006 2 Initialisierungen: A enthält Aufruf von B AB Inferenzregeln: AB BC AC Merke: keine zusätzliche Information

  17. bungsaufgaben zum Freitag 14.6 1) Rntgen-Bragg Reflexion von Silizium

    E-print Network

    Wünsche, Hans-Jürgen "Ede"

    �bungsaufgaben zum Freitag 14.6 1) Röntgen-Bragg Reflexion von Silizium Bei welchem Winkel (zwischen Oberfläche des Kristalls und einfallendem Strahl) tritt der erste Bragg Reflex von Silizium auf (d Röntgenstrahlung. Zur Lösung sind Kristallstruktur von Si zu recherchieren, der Strukturfaktor der Einheitszelle zu

  18. Zweite Satzung zur nderung der Ordnung ber die Erhebung von Gebhren

    E-print Network

    Greifswald, Ernst-Moritz-Arndt-Universität

    Zweite Satzung zur Änderung der Ordnung über die Erhebung von Gebühren an der Ernst-Moritz-Arndt-Universität Greifswald (Universitätsgebührenordnung) vom 29.05.2006 Aufgrund von § 16 Abs. 5 des Landeshochschulgesetzes. 1. der Anlage zur Ordnung über die Erhebung von Gebühren an der Ernst

  19. Struktur und Implementierung von Programmiersprachen I8. Juni 2006 6/1 LR(1)Itemmengenkonstruktion

    E-print Network

    Passau, Universität

    Struktur und Implementierung von Programmiersprachen I8. Juni 2006 6/1 LR(1)ItemmengenkonstruktionAb | B B x #12;Struktur und Implementierung von Programmiersprachen I8. Juni 2006 6/2 Beispiel: Konflikt bei SLR(1) Figure 2.96 #12;Struktur und Implementierung von Programmiersprachen I8. Juni 2006 6

  20. 28.07.2004 Amtliche Mitteilungen / 23. Jahrgang 64 der Satzung der Carl von Ossietzky

    E-print Network

    Damm, Werner

    28.07.2004 Amtliche Mitteilungen / 23. Jahrgang 64 �nderung der Satzung der Carl von Ossietzky. GVBl. Nr. 3/2004 S. 33), hat die Carl von Ossietzky Universität Oldenburg am 28.04.2004 die folgende �nderung der Satzung der Carl von Ossietzky Universität Ol- denburg zur Bildung eines

  1. Dritte Satzung zur nderung der Ordnung ber die Erhebung von Gebhren

    E-print Network

    Greifswald, Ernst-Moritz-Arndt-Universität

    1 Dritte Satzung zur Änderung der Ordnung über die Erhebung von Gebühren an der Ernst-Moritz-Arndt-Universität Greifswald (Universitätsgebührenordnung) vom 06.03.2007 Aufgrund von § 16 Abs. 5 des Gesetzes über die Erhebung von Gebühren an der Ernst-Moritz-Arndt- Universität Greifswald wird folgendes angefügt: v

  2. "I shall love you up to the death" (Marie-Antoinette to Axel von Fersen)

    E-print Network

    International Association for Cryptologic Research (IACR)

    "I shall love you up to the death" (Marie-Antoinette to Axel von Fersen) Jacques Patarin1 , Val the encryption algorithm used by the Queen of France, Marie- Antoinette, to send letters to Axel von Fersen for Fersen. Finally, we mention some open questions about Marie-Antoinette's correspondence with Axel von

  3. John von Neumann Institute for Computing Protein Aggregation and Unfolding Studied

    E-print Network

    Irbäck, Anders

    John von Neumann Institute for Computing Protein Aggregation and Unfolding Studied Using an All H.E. Hansmann (Editors) John von Neumann Institute for Computing, J¨ulich, NIC Series, Vol. 34, ISBN-10: 3-9810843-0-6, ISBN-13: 978-3-9810843-0-6, pp. 15-20 , 2006. c 2006 by John von Neumann Institute

  4. Line-of-sight Gradiometrie und ihre praktische Umsetzung im Falle von GRACE

    E-print Network

    Stuttgart, Universität

    Line-of-sight Gradiometrie und ihre praktische Umsetzung im Falle von GRACE Matthias Weigelt des Beschleunigungsansatzes durchgeführt werden. Die Schätzung von Skalierung und Bias ist ausreichend Berechnung von verfeinerten lokalen Lösungen aus GRACE Daten eingesetzt werden kann (Weigelt et al., 2008

  5. Studienjahr 2014/2015 |Medizin -Modellstudiengang HannibaL | MHH | Seite 1 von 3

    E-print Network

    Manstein, Dietmar J.

    Studienjahr 2014/2015 |Medizin - Modellstudiengang HannibaL | MHH | Seite 1 von 3 HannibaL | MHH | Seite 2 von 3 Art und Umfang der Lehrveranstaltung: 110 Std. Vorlesung 14 Std Grundprinzipien von Diagnostik, Therapie, Prävention und Rehabilitation Heranführung an das ärztliche Gespräch

  6. Verffentlichung von Dissertationen in elektronischer Form: Abgabe nur noch eines Printexemplars.

    E-print Network

    Paderborn, Universität

    Veröffentlichung von Dissertationen in elektronischer Form: Abgabe nur noch eines Printexemplars von Dissertationen vom 29.04.1977 in der Fassung vom 30.10.1997 der Kultusministerkonferenz (KMK) unterstützt die Universitäts- bibliothek Paderborn seit Ende der 1990er Jahre die Veröffentlichung von

  7. Quantitative metamaterial property extraction

    E-print Network

    Schurig, David

    2015-01-01

    We examine an extraction model for metamaterials, not previously reported, that gives precise, quantitative and causal representation of S parameter data over a broad frequency range, up to frequencies where the free space wavelength is only a modest factor larger than the unit cell dimension. The model is comprised of superposed, slab shaped response regions of finite thickness, one for each observed resonance. The resonance dispersion is Lorentzian and thus strictly causal. This new model is compared with previous models for correctness likelihood, including an appropriate Occam's factor for each fit parameter. We find that this new model is by far the most likely to be correct in a Bayesian analysis of model fits to S parameter simulation data for several classic metamaterial unit cells.

  8. Wilhelm von Humboldt's Idea of "Bildung" and Education.

    ERIC Educational Resources Information Center

    Stubbs, Elsina

    The importance of Wilhelm von Humboldt's work in educational philosophy is little known outside of Germany and even there he is more often criticized than praised. This is unfortunate because his contributions to education and other areas had an important impact on other philosophers of his period and are well worth considering today. In his main…

  9. Review Article von Willebrand factor, Jedi knight of the bloodstream

    E-print Network

    Springer, Timothy A.

    are so closely intertwined that, like mem- bers of the Jedi Order in the movie Star Wars who learn to use Skywalker, Star Wars VWF architecture Domains in the VWF monomer von blood vessels are cut, the forces in the bloodstream increase and change character. The dark side

  10. Wernher von Braun: Reflections on His Contributions to Space Exploration

    NASA Technical Reports Server (NTRS)

    Goldman, Arthur E.

    2012-01-01

    In 1950, Dr. Wernher von Braun and approximately 100 of his team members came to Huntsville, Alabama, to begin work with the Army on what would later become America's historic space program. He would later serve as the first director of the Marshall Space Flight Center and led the development of the Saturn V launch vehicle that launched seven crewed American mission to the moon, as well as America s first space station, Skylab. Von Braun is best known for his team s technical achievements. He realized his dream of exploring outer space by helping place humans on the moon. His engineering and managerial talent during the Apollo era had contributed to a technological revolution. He was by all accounts a good engineer, but he was only one among many. What set Von Braun apart were his charisma, his vision, and his leadership skills. He inspired loyalty and dedication in the people around him. He understood the importance of communicating his vision to his team, to political and business leaders and the public. Today, the Marshall Center continues his vision by pursuing engineering and scientific projects that will continue to open space to exploration. This presentation will discuss Von Braun's impact on Huntsville, the Marshall Center, the nation and the world and look at his contributions in context of where world space exploration is today.

  11. Von Neumann Entanglement and Decoherence in Two Dimensional Quantum Walks

    E-print Network

    Clement Ampadu

    2011-10-10

    Using the concept of von Neumann entropy, we quantify the information content of the various components of the quantum walk system, including the mutual information between its subsystems (coin and position) and use it to give a precise formulation of the measure of entanglement between subsystems.

  12. Treasure in the Library Attic: Von Ranke at Syracuse.

    ERIC Educational Resources Information Center

    Coville, Bruce

    1984-01-01

    Traces history of private library of German scholar, Leopold von Ranke, which was purchased by Syracuse University in 1888. Efforts of librarian Charles W. Bennett in 1870s and Professor James Powell beginning in late 1960s, and restoration and cataloging of collection are highlighted. Items from the collection are noted. (EJS)

  13. Anmeldung Diss. Technik -Nov. 2012 Seite 1 von 2 Matrikelnummer

    E-print Network

    Breu, Ruth

    -Mail, Telefonnummer Studium An die/den Universitätsstudienleiter/in der Leopold-Franzens-Universität Innsbruck zH der Bestimmungen" der Leopold-Franzens-Universität Innsbruck) Thema (Arbeitstitel) der Dissertation plus Exposé1 Sachmitteln von Einrichtungen der Leopold-Franzens-Universität Innsbruck Zutreffendes angekreuzt nein ja - die

  14. Acceleration Waves in the von Karman Plate Theory

    E-print Network

    Peter A. Djondjorov; Vassil M. Vassilev

    2000-06-27

    In the present work we study acceleration waves in plate-like bodies using the balance laws for the time-dependent von Karman equations presented in [P. A. Djondjorov and V. M. Vassilev, Conservation Laws and Group-Invariant Solutions of the von Karman Equations, Int. J. Nonlinear Mech. 31 (1), pp. 73-87, (1986)]. Two of these balance laws correspond to the time-dependent von Karman equations themselves. They are used to define acceleration waves in thin isotropic elastic plates as discontinuity solutions with finite jumps of second derivatives of the displacement field at a certain curve - the wave front. These two balance laws lead through Hadamard's lemma and Kotchin's theorem to a set of jump conditions on the wave front. Similarly, the other balance laws lead to additional and independent jump conditions on the curve of discontinuity. Several examples are given to illustrate the effect of involving jump conditions of that kind in analysis of acceleration waves in plates. The examples are composed on the basis of three families of group-invariant solutions to the time-dependent von Karman equations. They present three kinds of waveforms pertaining to the class of the so-called relatively undistorded progressive waves. We analyze the propagation of this special kind of acceleration waves into a known state of plate motion.

  15. Gathering Correlated Data in Sensor Networks Pascal von Rickenbach

    E-print Network

    include monitoring of continuous environmen- tal conditions such as temperature, humidity, or seismic acGathering Correlated Data in Sensor Networks Pascal von Rickenbach Computer Engineering energy-efficient gathering of cor- related data in sensor networks. We focus on single-input coding

  16. Fakultt fr Informatik Otto-von-Guericke-Universitt Magdeburg

    E-print Network

    Apel, Sven

    Otto-von-Guericke-Universität Magdeburg Nr.: 3 FIN-04-2011 Flexible Dynamic Software Updates of Java to test new program parts can be time consuming and annoying. Thus, we aim at dynamic software updates to update programs at runtime. There is a large body of research on dynamic software updates, but so far

  17. OCCLUSION TRACKING USING LOGIC MODELS James H. von Brecht

    E-print Network

    Ferguson, Thomas S.

    OCCLUSION TRACKING USING LOGIC MODELS James H. von Brecht Department of Mathematics University encountered local minima issues. 2.1 Logic Models Before introducing our model, we briefly describe the region-based logic models [1, 2] based upon the Chan-Vese (C-V) segmentation energy [4]. While dealing with multi

  18. Max-Planck-Institut zur Erforschung von Gemeinschaftsgtern

    E-print Network

    Ferrari, Patrik L.

    Max-Planck-Institut zur Erforschung von Gemeinschaftsgütern Zum nächstmöglichen Zeitpunkt suchen Programmiersprachen einzuarbeiten? Dann freuen wir uns über Ihre Bewerbung! Das Max-Planck-Institut zur Erforschung entsprechender Qualifikation ausdrücklich auf, sich zu bewerben. Die Max-Planck-Gesellschaft ist bemüht, mehr

  19. INVITED REVIEW Biology and physics of von Willebrand factor concatamers

    E-print Network

    Springer, Timothy A.

    haemostasis by activating binding of the A1 domain to platelet GPIba, and over longer time periods, regulate: biosynthesis, secretion, shear flow, thrombotic thrombocytopenic purpura, von Willebrand disease, weibel palade, collagen, platelet glycoprotein Ib (GPIb), and integrins aIIbb3 and aVb3 (Fig. 1A). VWF multimers

  20. Dr. Wernher Von Braun with Congressman Gerald R. fod

    NASA Technical Reports Server (NTRS)

    1999-01-01

    On a visit to the Marshall Space Flight Center in April, 1964, Congressman Gerald R. Ford, Jr. Republican of Michigan, was warmly greeted by Dr. Wernher Von Braun, Marshall Space Flight Center director. Ford, along with two other congressmen, visited the center for a briefing on the Saturn program and for a tour of the facilities.

  1. Dr. Wernher Von Braun near the mobile launcher.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. George Mueller, NASA associate administrator for manned space flight, and Dr. Wernher Von Braun (right), director of the Marshall Space Flight Center, are seen near the mobile launcher carrying a 363 foot tall Saturn V space launch vehicle as the rocket is rolled from the vehicle assembly building at KSC for its three mile trip to the launch pad.

  2. Ernst von Glasersfeld's Radical Constructivism and Truth as Disclosure

    ERIC Educational Resources Information Center

    Joldersma, Clarence W.

    2011-01-01

    In this essay Clarence Joldersma explores radical constructivism through the work of its most well-known advocate, Ernst von Glasersfeld, who combines a sophisticated philosophical discussion of knowledge and truth with educational practices. Joldersma uses Joseph Rouse's work in philosophy of science to criticize the antirealism inherent in…

  3. Amphiphilic hard body mixtures Matthias Schmidt and Christian von Ferber

    E-print Network

    Schmidt, Matthias

    Amphiphilic hard body mixtures Matthias Schmidt and Christian von Ferber Institut fu¨r Theoretische Received 16 June 2001; published 29 October 2001 In order to study ternary amphiphilic mixtures, we and amphiphilic particles, where the hydrophilic head is modeled as a hard sphere and the hydrophobic tail

  4. [Clinical and fluorescein angiographic aspects in retinal angiomatosis (von Hippel)].

    PubMed

    Samoil?, O; C?lug?ru, D; C?lug?ru, M

    2007-01-01

    Retinal angiomas represent a rare condition consisting of hamartomas isolated or associated with a systemic disease (Von Hippel-Lindau Disease). We present a patient with multiple retinal angiomas, with atypical fluorescein angiography possible due to vascular thrombotic phenomena. Visual acuity was slightly diminished because of hemorrhagic complications. Systemic involvement was excluded with imaging studies. PMID:17937036

  5. Mol-Gastronomie Von Weihnachtsplätzchen und anderen granularen Backwerken

    NASA Astrophysics Data System (ADS)

    Vilgis, Thomas

    2003-11-01

    Weihnachten steht vor der Tür, und aus den Backöfen duften die ersten Plätzchen als Vorboten. Die isst man auch bei Physikers so gern, dass kaum ein Krumen übrig bleibt. Dabei sind die Krümel besonders interessant, denn sie zeigen eine Vielzahl von Merkmalen und lassen auf die verschiedenen Teigarten schließen, deren Reiz nicht nur im Geschmack, sondern auch in Herstellungsweise und Teigklasse liegt.

  6. Die Entwicklung eines Business Intelligence Systems zur Beschaffung von Geschfts-

    E-print Network

    Reiterer, Harald

    Die Entwicklung eines Business Intelligence Systems zur Beschaffung von Geschäfts- informationen im Informationssuche unterstützen soll. Da der erfolgreiche Einsatz eines Business Intelligence System ganz wesentlich Projektes verfolgt werden. 1 Motivation und Ziel Im Rahmen des Beitrags wird das Business Intelligence

  7. Algebra Ubungen 3 WS 05/06 26. Sei (G, +) eine kommutative Gruppe. Dann bilden die Endomorphismen von G,

    E-print Network

    Frisch, Sophie

    von G, End(G) = {: G G | (g + h) = (g) + (h)}, einen Ring mit Eins (End(G), +, ) bzgl. elementweiser Addition ( + )(g) = (g) + (g) und der Verkn¨upfung von Funktionen als Multiplikation ( )(g) = ((g)). 27 Gruppenhomomorphismen : Cn Cm (ii) alle Automorphismen von Cn 31. Seien H und K Untergruppen von G. Dann ist HK = {hk

  8. Ubungen 3 WS 05/06 26. Sei (G, +) eine kommutative Gruppe. Dann bilden die Endomorphismen von G,

    E-print Network

    Frisch, Sophie

    von G, End(G) = {#: G # G | #(g + h) = #(g) + #(h)}, einen Ring mit Eins (End(G), +, #) bzgl. elementweiser Addition (# + #)(g) = #(g) + #(g) und der VerknË?upfung von Funktionen als Multiplikation (# # #)(g von C n 31. Seien H und K Untergruppen von G. Dann ist HK = {hk | h # H, k # K} genau dann eine

  9. Hemostatic efficacy, safety, and pharmacokinetics of a recombinant von Willebrand factor in severe von Willebrand disease

    PubMed Central

    Gill, Joan C.; Castaman, Giancarlo; Windyga, Jerzy; Kouides, Peter; Ragni, Margaret; Leebeek, Frank W. G.; Obermann-Slupetzky, Ortrun; Chapman, Miranda; Fritsch, Sandor; Pavlova, Borislava G.; Presch, Isabella

    2015-01-01

    This phase 3 trial evaluated the safety and hemostatic efficacy of a recombinant von Willebrand factor (rVWF) for treatment of bleeds in severe von Willebrand disease (VWD). rVWF was initially administered together with recombinant factor VIII (rFVIII) and subsequently alone, as long as hemostatic factor VIII activity (FVIII:C) levels were maintained. Pharmacokinetics (PK) were evaluated in a randomized cross-over design (rVWF vs rVWF:rFVIII at 50 IU VWF:ristocetin cofactor activity [RCo]/kg). Bleed control for all treated bleeds (N = 192 bleeds in 22 subjects) was rated good or excellent (96.9% excellent; 119 of 122 minor, 59 of 61 moderate, and 6 of 7 major bleeds) on a 4-point scale (4 = none to 1 = excellent). A single infusion was effective in 81.8% of bleeds. Treatment success, defined as the number of subjects with a mean efficacy rating of <2.5, was 100%. The PK profile of rVWF was not influenced by rFVIII (mean VWF:RCo terminal half-life: 21.9 hours for rVWF and 19.6 hours for rVWF:rFVIII). FVIII:C levels increased rapidly after rVWF alone, with hemostatic levels achieved within 6 hours and sustained through 72 hours after infusion. Eight adverse events (AEs; 6 nonserious AEs in 4 subjects and 2 serious AEs [chest discomfort and increased heart rate, without cardiac symptomatology] concurrently in 1 subject) were associated with rVWF. There were no thrombotic events or severe allergic reactions. No VWF or FVIII inhibitors, anti-VWF binding antibodies, or antibodies against host cell proteins were detected. These results show that rVWF was safe and effective in treating bleeds in VWD patients and stabilizes endogenous FVIII:C, which may eliminate the need for rFVIII after the first infusion. This trial was registered at www.clinicaltrials.gov as #NCT01410227. PMID:26239086

  10. Quantitative environmental risk analysis

    SciTech Connect

    Klovning, J.; Nilsen, E.F.

    1995-12-31

    According to regulations relating to implementation and rise of risk analysis in the petroleum activities issued by the Norwegian Petroleum Directorate, it is mandatory for an operator on the Norwegian Continental Shelf to establish acceptance criteria for environmental risk in the activities and carry out environmental risk analysis. This paper presents a {open_quotes}new{close_quotes} method for environmental risk analysis developed by the company. The objective has been to assist the company to meet rules and regulations and to assess and describe the environmental risk in a systematic manner. In the environmental risk analysis the most sensitive biological resource in the affected area is used to assess the environmental damage. The analytical method is based on the methodology for quantitative risk analysis related to loss of life. In addition it incorporates the effect of seasonal fluctuations in the environmental risk evaluations. The paper is describing the function of the main analytical sequences exemplified through an analysis of environmental risk related to exploration drilling in an environmental sensitive area on the Norwegian Continental Shelf.

  11. Quantitive DNA Fiber Mapping

    SciTech Connect

    Lu, Chun-Mei; Wang, Mei; Greulich-Bode, Karin M.; Weier, Jingly F.; Weier, Heinz-Ulli G.

    2008-01-28

    Several hybridization-based methods used to delineate single copy or repeated DNA sequences in larger genomic intervals take advantage of the increased resolution and sensitivity of free chromatin, i.e., chromatin released from interphase cell nuclei. Quantitative DNA fiber mapping (QDFM) differs from the majority of these methods in that it applies FISH to purified, clonal DNA molecules which have been bound with at least one end to a solid substrate. The DNA molecules are then stretched by the action of a receding meniscus at the water-air interface resulting in DNA molecules stretched homogeneously to about 2.3 kb/{micro}m. When non-isotopically, multicolor-labeled probes are hybridized to these stretched DNA fibers, their respective binding sites are visualized in the fluorescence microscope, their relative distance can be measured and converted into kilobase pairs (kb). The QDFM technique has found useful applications ranging from the detection and delineation of deletions or overlap between linked clones to the construction of high-resolution physical maps to studies of stalled DNA replication and transcription.

  12. Quantitative Electron Nanodiffraction.

    SciTech Connect

    Spence, John

    2015-01-30

    This Final report summarizes progress under this award for the final reporting period 2002 - 2013 in our development of quantitive electron nanodiffraction to materials problems, especially devoted to atomistic processes in semiconductors and electronic oxides such as the new artificial oxide multilayers, where our microdiffraction is complemented with energy-loss spectroscopy (ELNES) and aberration-corrected STEM imaging (9). The method has also been used to map out the chemical bonds in the important GaN semiconductor (1) used for solid state lighting, and to understand the effects of stacking sequence variations and interfaces in digital oxide superlattices (8). Other projects include the development of a laser-beam Zernike phase plate for cryo-electron microscopy (5) (based on the Kapitza-Dirac effect), work on reconstruction of molecular images using the scattering from many identical molecules lying in random orientations (4), a review article on space-group determination for the International Tables on Crystallography (10), the observation of energy-loss spectra with millivolt energy resolution and sub-nanometer spatial resolution from individual point defects in an alkali halide, a review article for the Centenary of X-ray Diffration (17) and the development of a new method of electron-beam lithography (12). We briefly summarize here the work on GaN, on oxide superlattice ELNES, and on lithography by STEM.

  13. 1bernommen von F.Henneberger, VL Optik WS09 Details HeNe-Laser: Laserbergnge, Modenselektion

    E-print Network

    Wünsche, Hans-Jürgen "Ede"

    1übernommen von F.Henneberger, VL Optik WS09 #12;2 Details HeNe-Laser: Laserübergänge;5übernommen von F.Henneberger, VL Optik WS09 #12;6übernommen von F.Henneberger, VL Optik WS09 #12;7übernommen von F.Henneberger, VL Optik WS09 #12;8 (erster Laser!) übernommen von F.Henneberger, VL Optik WS09 #12

  14. Zelltyp-spezifische Mikroanalyse von Arabidopsis thaliana-Blättern

    NASA Astrophysics Data System (ADS)

    Brandt, Stephan Peter

    2002-04-01

    Im ersten Teil der Arbeit wurden Strategien zur Analyse von Transkripten erarbeitet. Die ersten Versuche zielten darauf ab, in mit Glaskapillaren genommenen Einzelzellproben verschiedener Gewebeschichten RT-PCR durchzuführen, um spezifische Transkripte nachweisen zu können. Dies gelang für eine Reihe von Genen aus verschiedenen Pflanzenspezies. Dabei konnten sowohl Transkripte stark wie auch schwach exprimierter Gene nachgewiesen werden. Für die Erstellung von Gewebe-spezifischen Expressionsprofilen war es notwendig, die in vereinigten Zellproben enthaltene mRNA zunächst zu amplifizieren, um eine ausreichende Menge für Arrayhybridisierungen zu erhalten. Vor der Vermehrung wurde die mRNA revers transkribiert. Es wurden daran anschließend verschiedene Amplifikationsstrategien getestet: Die neben Tailing, Adapterligation und anderen PCR-basierenden Protokollen getestete Arbitrary-PCR hat sich in dieser Arbeit als einfache und einzige Methode herausgestellt, die mit so geringen cDNA-Mengen reproduzierbar arbeitet. Durch Gewebe-spezifische Array-hybridisierungen mit der so amplifizierten RNA konnten schon bekannte Expressionsmuster verschiedener Gene, vornehmlich solcher, die an der Photosynthese beteiligt sind, beobachtet werden. Es wurden aber auch eine ganze Reihe neuer offensichtlich Gewebe-spezifisch exprimierter Gene gefunden. Exemplarisch für die differentiell exprimierten Gene konnte das durch Arrayhybridisierungen gefundene Expressionsmuster der kleinen Untereinheit von Rubisco verifiziert werden. Hierzu wurden Methoden zum Gewebe-spezifischen Northernblot sowie semiquantitativer und Echtzeit-Einzelzell-RT-PCR entwickelt. Im zweiten Teil der Arbeit wurden Methoden zur Analyse von Metaboliten einschließlich anorganischer Ionen verwendet. Es stellte sich heraus, daß die multiparallele Methode der Gaschromatographie-Massenspektrometrie keine geeignete Methode für die Analyse selbst vieler vereinigter Zellinhalte ist. Daher wurde auf Kapillarelektrophorese zurückgegriffen. Eine Methode, die mit sehr kleinen Probenvolumina auskommt, eine hohe Trennung erzielt und zudem extrem geringe Detektionslimits besitzt. Die Analyse von Kohlenhydraten und Anionen erfordert eine weitere Optimierung. Über UV-Detektion konnte die K+-Konzentration in verschiedenen Geweben von A. thaliana bestimmt werden. Sie lag in Epidermis und Mesophyll mit ca. 25 mM unterhalb der für andere Pflanzenspezies (Solanum tuberosum und Hordeum vulgare) publizierten Konzentration. Weiter konnte gezeigt werden, daß zwölf freie Aminosäuren mittels einer auf Kapillarelektrophorese basierenden Methode in vereinigten Zellproben von Cucurbita maxima identifiziert werden konnten. Die Übertragung der Methode auf A. thaliana-Proben muß jedoch weiter optimiert werden, da die Sensitivität selbst bei Laser induzierter Fluoreszenz-Detektion nicht ausreichte. Im dritten und letzten Teil der Arbeit wurde eine Methode entwickelt, die die Analyse bekannter wie unbekannter Proteine in Gewebe-spezifischen Proben ermöglicht. Hierzu wurde zur Probennahme mittels mechanischer Mikrodissektion eine alternative Methode zur Laser Capture Microdissection verwendet, um aus eingebetteten Gewebeschnitten distinkte Bereiche herauszuschneiden und somit homogenes Gewebe anzureichern. Aus diesem konnten die Proteine extrahiert und über Polyacrylamidgelelektrophorese separariert werden. Banden konnten ausgeschnitten, tryptisch verdaut und massenspektrometrisch die Primärsequenz der Peptidfragmente bestimmt werden. So konnten als Hauptproteine im Mesophyll die große Untereinheit von Rubisco sowie ein Chlorophyll bindendes Protein gefunden werden. Die in dieser Arbeit entwickelten und auf die Modellpflanze Arabidopsis thaliana angewandten Einzelzellanalysetechniken erlauben es in Zukunft, physiologische Prozesse besser sowohl räumlich als auch zeitlich aufzulösen. Dies wird zu einem detaillierteren Verständnis mannigfaltiger Vorgänge wie Zell-Zell-Kommunikation, Signalweiterleitung oder Pflanzen-Pathogen-Interaktionen führen. The subject of this thesis was the analys

  15. QUANTITATIVE 15N NMR SPECTROSCOPY

    EPA Science Inventory

    Line intensities in 15N NMR spectra are strongly influenced by spin-lattice and spin-spin relaxation times, relaxation mechanisms and experimental conditions. Special care has to be taken in using 15N spectra for quantitative purposes. Quantitative aspects are discussed for the 1...

  16. Quantitative spectroscopy of Deneb

    NASA Astrophysics Data System (ADS)

    Schiller, F.; Przybilla, N.

    2008-03-01

    Context: Quantitative spectroscopy of luminous BA-type supergiants offers a high potential for modern astrophysics. Detailed studies allow the evolution of massive stars, galactochemical evolution, and the cosmic distance scale to be constrained observationally. Aims: A detailed and comprehensive understanding of the atmospheres of BA-type supergiants is required in order to use this potential properly. The degree to which we can rely on quantitative studies of this class of stars as a whole depends on the quality of the analyses for benchmark objects. We constrain the basic atmospheric parameters and fundamental stellar parameters, as well as chemical abundances of the prototype A-type supergiant Deneb to unprecedented accuracy by applying a sophisticated analysis methodology, which has recently been developed and tested. Methods: The analysis is based on high-S/N and high-resolution spectra in the visual and near-IR. Stellar parameters and abundances for numerous astrophysically interesting elements are derived from synthesis of the photospheric spectrum using a hybrid non-LTE technique, i.e. line-blanketed LTE model atmospheres and non-LTE line formation. Multiple metal ionisation equilibria and numerous hydrogen lines from the Balmer, Paschen, Brackett, and Pfund series are utilised simultaneously for the stellar parameter determination. The stellar wind properties are derived from H? line-profile fitting using line-blanketed hydrodynamic non-LTE models. Further constraints come from matching the photospheric spectral energy distribution from the UV to the near-IR L band. Results: The atmospheric parameters of Deneb are tightly constrained: effective temperature T_eff = 8525±75 K, surface gravity log g = 1.10±0.05, microturbulence ? = 8±1 km s-1, macroturbulence, and projected rotational velocity v sin i are both 20 ± 2 km s-1. The abundance analysis gives helium enrichment by 0.10 dex relative to solar and an N/C ratio of 4.44 ± 0.84 (mass fraction), implying strong mixing with CN-processed matter. The heavier elements are consistently underabundant by 0.20 dex compared to solar. Peculiar abundance patterns, which were suggested in previous analyses cannot be confirmed. Accounting for non-LTE effects is essential for removing systematic trends in the abundance determination, for minimising statistical 1?-uncertainties to ?10-20% and for establishing all ionisation equilibria at the same time. Conclusions: A luminosity of (1.96 ± 0.32)×105 L?, a radius of 203 ± 17 R_?, and a current mass of 19 ± 4 M? are derived. Comparison with stellar evolution predictions suggests that Deneb started as a fast-rotating late O-type star with M^ZAMS? 23 M_? on the main sequence and is currently evolving to the red supergiant stage. Based on observations collected at the Centro Astronómico Hispano Alemán (CAHA) at Calar Alto, operated jointly by the Max-Planck Institut für Astronomie and the Instituto de Astrofisica de Andalucia (CSIC). Appendix A is only available in electronic form at http://www.aanda.org

  17. Quantitative Spectroscopy of Deneb

    NASA Astrophysics Data System (ADS)

    Schiller, Florian; Przybilla, N.

    We use the visually brightest A-type supergiant Deneb (A2 Ia) as benchmark for testing a spectro- scopic analysis technique developed for quantitative studies of BA-type supergiants. Our NLTE spectrum synthesis technique allows us to derive stellar parameters and elemental abundances with unprecedented accuracy. The study is based on a high-resolution and high-S/N spectrum obtained with the Echelle spectrograph FOCES on the Calar Alto 2.2 m telescope. Practically all inconsistencies reported in earlier studies are resolved. A self-consistent view of Deneb is thus obtained, allowing us to discuss its evolutionary state in detail by comparison with the most recent generation of evolution models for massive stars. The basic atmospheric parameters Teff = 8525 ± 75 K and log g = 1.10 ± 0.05 dex (cgs) and the distance imply the following fundamental parameters for Deneb: M spec = 17 ± 3 M? , L = 1.77 ± 0.29 · 105 L? and R = 192 ± 16 R? . The derived He and CNO abundances indicate mixing with nuclear processed matter. The high N/C ratio of 4.64 ± 1.39 and a N/O ratio of 0.88 ± 0.07 (mass fractions) could in principle be explained by evolutionary models with initially very rapid rotation. A mass of ˜ 22 M? is implied for the progenitor on the zero-age main se- quence, i.e. it was a late O-type star. Significant mass-loss has occurred, probably enhanced by pronounced centrifugal forces. The observational constraints favour a scenario for the evolu- tion of Deneb where the effects of rotational mixing may be amplified by an interaction with a magnetic field. Analogous analyses of such highly luminous BA-type supergiants will allow for precision studies of different galaxies in the Local Group and beyond.

  18. Instrumentation for Studies of Cochlear Mechanics: From von Békésy forward

    PubMed Central

    Nuttall, Alfred L; Fridberger, Anders

    2012-01-01

    Georg von Békésy designed the instruments needed for his research. He also created physical models of the cochlea allowing him to manipulate the parameters (such as volume elasticity) that could be involved in controlling traveling waves. This review is about the specific devices that he used to study the motion of the basilar membrane thus allowing the analysis that lead to his Nobel Prize Award. The review moves forward in time mentioning the subsequent use of von Békésy’s methods and later technologies important for motion studies of the organ of Corti. Some of the seminal findings and the controversies of cochlear mechanics are mentioned in relation to the technical developments. PMID:22975360

  19. Marshall-Stickler phenotype associated with von Willebrand disease

    SciTech Connect

    MacDonald, M.R.; Baker, K.S.; Schaefer, G.B.

    1997-01-20

    We report on 6 individuals from three different kindreds with Marshall-Stickler (MS) phenotype, with characteristic orofacial abnormalities, arthropathy, deafness, and eye findings, all of whom were discovered to have a mild bleeding diathesis and coagulation-study findings consistent with mild von Willebrand disease (vWD). MS syndrome has been linked in some cases to the type II procollagen gene (COL2A1) on chromosome 12q, and to the collagen XI gene (COL11A2) on chromosome 6. The von Willebrand factor (vWF) is encoded by a 180-Kb gene located on the short arm of chromosome 12. This is the first reported association of these two disorders. 26 refs., 5 figs., 1 tab.

  20. Water Experiments Related To The "Von Karman Sodium" Dynamo Project

    NASA Astrophysics Data System (ADS)

    Marie, L.; Bourgoin, M.; Petrelis, F.; Roy, J.; Burguete, J.; Chiffaudel, A.; Daviaud, F.; Fauve, S.; Odier, P.; Pinton, J.-F.

    2002-07-01

    The purpose of the "Von Karman Sodium" (V.K.S.) experiment is to study the "Dynamo Effect," namely the spontaneous generation of magnetic field in a flow of electrically conducting fluid. The device has been built at CEA / Cadarache, in collaboration with CEA / Saclay, Ecole Normale Superieure de Lyon and Ecole Normale Superieure de Paris. It consists of a cylindrical vessel, filled with liquid Sodium, in which two coaxial rotating disks induce a Von-Karman type flow. Several experimental runs have taken place since June 2000. In order to optimize the V.K.S. set-up, a half-scale water prototype has also been built. It has allowed us to measure mean velocity profiles, as well as pressure fluctuations and mechanical power dissipation. We have observed that under certain circumstances the mean component of the turbulent flow can undergo a global bifurcation.

  1. Renaturierung von Ökosystemen in urban-industriellen Landschaften

    NASA Astrophysics Data System (ADS)

    Rebele, Franz

    Die Urbanisierung ist ein weltweit stattfindender Prozess mit weitreichenden Auswirkungen auf Mensch und Natur. In Mitteleuropa leben heute etwa 80% aller Bewohner in Städten. Urban-industrielle Landschaften gehören deshalb zur unmittelbaren Lebensumwelt der meisten Menschen. Allein in Deutschland wird heute täglich eine Fläche von 120 ha neu für Siedlungs- und Verkehrszwecke in Anspruch genommen. Zu den Siedlungs- und Verkehrsflächen zählen Gebäude-und gebäudebezogene Freiflächen, Verkehrsflächen, Erholungsflächen und Friedhöfe sowie Betriebsflächen für Industrie und Gewerbe. Nicht enthalten sind Tagebauflächen zum Abbau von Bodenschätzen (Kapitel 13). In Deutschland liegt der Anteil der Siedlungs- und Verkehrsflächen an der Gesamtfläche derzeit bei ca. 13%, in Österreich bei 5 % und in der Schweiz bei knapp 7 %. Charakteristisch für die heutige Entwicklung in Mitteleuropa ist, dass die Prozesse der Urbanisierung und der Flächeninanspruchnahme für Siedlung und Verkehr nicht ursächlich mit einem Bevölkerungswachstum verbunden sind, d. h. dass Freiflächen auch bei stagnierender oder in manchen Regionen sogar bei sinkender Einwohnerzahl bebaut werden.

  2. Von Neumann coordinatization is not first-order

    E-print Network

    Friedrich Wehrung

    2006-01-28

    A lattice L is coordinatizable, if it is isomorphic to the lattice L(R) of principal right ideals of some von Neumann regular ring R. This forces L to be complemented modular. All known sufficient conditions for coordinatizability, due first to J. von Neumann, then to B. Jonsson, are first-order. Nevertheless, we prove that coordinatizability of lattices is not first-order, by finding a non-coordinatizable lattice K with a coordinatizable countable elementary extension L. This solves a 1960 problem of B. Jonsson. We also prove that there is no L\\_{infinity, infinity} statement equivalent to coordinatizability. Furthermore, the class of coordinatizable lattices is not closed under countable directed unions; this solves another problem of B. Jonsson from 1962.

  3. Eine FPAA-Architektur zur rekonfigurierbaren Instantiierung von zeitkontinuierlichen Analogfiltern

    NASA Astrophysics Data System (ADS)

    Becker, J.; Manoli, Y.

    2005-05-01

    Im Folgenden wird eine neue Methodik von FPAAs (Field Programmable Analog Arrays) gezeigt, die speziell für die Instantiierung von zeitkontinuierlichen (continuous-time, CT) Analogfiltern in Hardware entwickelt wurde. Die Chiptopologie beinhaltet 17 digital konfigurierbare analoge Blöcke (configurable analog blocks, CABs), die durch ein hexagonales Netzwerk miteinander verbunden sind. Jeder CAB ist aus einstellbaren Gm-C Integratoren aufgebaut, welche das analoge Signal sowohl formen und seinen Weg durch die Matrix festlegen, gleichzeitig aber auch die Grundbausteine für zeitkontinuierliche Hochfrequenzfilter darstellen. Intelligente Pufferspeicher für die Ein-/Ausgänge (IO-buffer) garantieren die Rekonfigurierung der Matrix mit minimaler Störung des kontinuierlichen Analogsignals. Die Architektur wird als Hardwareplattform für beliebige Schaltungen, welche aus einer gegebenen Anzahl an Gm-C-Zellen bestehen, eingeführt und verifiziert bevor eine exemplarische Instantiierung eines Butterworth Filters 4. Ordnung in Biquad Anordnung gezeigt wird.

  4. The Vanadium(V) Oxoazides [VO(N3)3], [(bipy)VO(N3)3], and [VO(N3)5](2-).

    PubMed

    Haiges, Ralf; Vasiliu, Monica; Dixon, David A; Christe, Karl O

    2015-07-27

    Vanadium(V) oxoazide [VO(N3)3] was prepared through a fluoride-azide exchange reaction between [VOF3] and Me3SiN3 in acetonitrile solution. When the highly impact- and friction-sensitive compound [VO(N3)3] was reacted with 2,2?-bipyridine, the adduct [(bipy)VO(N3)3] was isolated. The reaction of [VO(N3)3] with [PPh4]N3 resulted in the formation and isolation of the salt [PPh4]2[VO(N3)5]. The adduct [(bipy)VO(N3)3] and the salt [PPh4]23[VO(N3)5] were characterized by vibrational spectroscopy and single-crystal X-ray structure determination, making these compounds the first structurally characterized vanadium(V) azides. PMID:26072899

  5. Dr. Wernher Von Braun at the launch of Apollo 11.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Mission officials relax, all smiles, a few moments after the successful launch of the Apollo 11 spacecraft by Saturn V vehicle AS-506. Relieved of the tension of waiting through the countdown are (left to right) Charles W. Matthews, NASA deputy associate administrator for manned space flight; Dr. Wernher Von Braun, Director of the Marshall Space Flight Center; Dr. George E. Meuller, NASA associate administrator for manned spaceflight, and Lt. General Samuel C. Phillips, director of the Apollo program.

  6. Aufbau von organisationsübergreifenden Fehlermanagementprozessen im Projekt IntegraTUM

    NASA Astrophysics Data System (ADS)

    Hommel, Wolfgang; Knittl, Silvia

    Das Projekt IntegraTUM wird in enger Kooperation zwischen der Technischen Universität München (TUM) und dem Leibniz-Rechenzentrum (LRZ) durchgeführt. In diesem Projekt werden Dienste gemeinsam entwickelt, die nachhaltig vom LRZ betrieben werden sollen. Die damit verbundene Rezentralisierung erfordert auch eine enge Kooperation im Falle von technischen Störungen und Fehlern im Betriebsablauf bei diesen Diensten über die Organisationsgrenzen hinweg. Unsere Aktivitäten in diesem organisationsübergreifenden Fehlermanagement werden hier beschrieben.

  7. On von Neumann and Bell theorems applied to quantumness tests

    E-print Network

    Robert Alicki

    2008-10-26

    The issues, raised in arXiv:0809.011, concerning the relevance of the von Neumann theorem for the single-system's quantumness test proposed in arXiv:0704.1962 and performed for the case of single photon polarization in arXiv:0804.1646, and the usefulness of Bell's inequality for testing the idea of macroscopic quantum systems are discussed in some details. Finally, the proper quantum mechanical description of the experiment with polarized photon beams is presented.

  8. Interpolatability distinguishes LOCC from separable von Neumann measurements

    SciTech Connect

    Childs, Andrew M.; Leung, Debbie; Man?inska, Laura; Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L 3G1 ; Ozols, Maris; Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L 3G1; IBM TJ Watson Research Center, Yorktown Heights, New York 10598

    2013-11-15

    Local operations with classical communication (LOCC) and separable operations are two classes of quantum operations that play key roles in the study of quantum entanglement. Separable operations are strictly more powerful than LOCC, but no simple explanation of this phenomenon is known. We show that, in the case of von Neumann measurements, the ability to interpolate measurements is an operational principle that sets apart LOCC and separable operations.

  9. Einflüsse von Fahrerassistenzsystemen auf die Systemarchitektur im Kraftfahrzeug

    NASA Astrophysics Data System (ADS)

    Reichart, Günter; Bielefeld, Jürgen

    Die Komplexität der Systeme bei modernen, hoch ausgestatteten Fahrzeugen hat ein hohes Niveau erreicht. Auch in Zukunft werden Innovationen im Kraftfahrzeug vermehrt nur über hochvernetzte und komplexe Systeme zu realisieren sein. Dies gilt in besonderem Maße für das Gebiet der Fahrerassistenz. Aufgrund der Nutzung von sensorisch erfasster Information über die Fahrumgebung, fahrzeuglokaler Daten und der Nutzung der bereits im Fahrzeug verbauten Aktorik sind Fahrerassistenzsysteme geradezu ein Synonym für verteilte hochvernetzte Funktionen. Umfang und Qualität der sensorisch erfassbaren Information und ihre Interpretation bestimmen den Funktionsumfang und die Komplexität der jeweiligen Assistenzfunktion wesentlich. Die technische Sensorik, z. B. Radar oder Kamerasysteme, nutzt gleiche oder ähnliche Information wie der Fahrer. Es wird allerdings auch auf längere Sicht keine Sensorik geben, die die Gesamtheit der Wahrnehmungsleistungen des Menschen und seine Fähigkeit der Interpretation dieser Daten in unterschiedlichen Kontexten erreicht. In einzelnen Aspekten sind technische Sensoren aber durchaus der menschlichen Wahrnehmung überlegen, wie beispielsweise bezüglich Daueraufmerksamkeit, Geschwindigkeitsbestimmung bewegter Objekte oder aufgrund von Empfindlichkeit in anderen Wellenlängenbereichen als der des menschlichen Auges. Insbesondere die Verknüpfung der Sensorinformationen, die so genannte Sensorfusion, bietet ein hohes Potenzial, den Fahrer zu entlasten und die Fahrsicherheit zu erhöhen bzw. kritischen Fahrsituationen vorzubeugen. Durch die Sensorfusion wird die Qualität der Interpretation von mit technischer Sensorik erfassten Daten deutlich erhöht. Hierzu sind Entscheidungen über die Fusionsebene wie Rohdaten, aufbereitete oder interpretierte Daten zu treffen sowie geeignete Fusionsarchitekturen im Fahrzeug vorzusehen (siehe Kapitel 17).

  10. Von Neumann and Luders postulates and quantum information theory

    E-print Network

    Andrei Khrennikov

    2009-05-27

    This note is devoted to some foundational aspects of quantum mechanics (QM) related to quantum information (QI) theory, especially quantum teleportation and ``one way quantum computing.'' We emphasize the role of the projection postulate (determining post-measurement states) in QI and the difference between its L\\"uders and von Neumann versions. These projection postulates differ crucially in the case of observables with degenerate spectra. Such observables play the fundamental role in operations with entangled states: any measurement on one subsystem is represented by an observable with degenerate spectrum in the Hilbert space of a composite system. If von Neumann was right and L\\"uders was wrong the canonical schemes of quantum teleportation and ``one way quantum computing'' would not work. Surprisingly, we found that, in fact, von Neumann's description of measurements via refinement implies (under natural assumptions) L\\"uders projection postulate. It seems that this important observation was missed during last 70 years. This result closed the problem of the proper use of the projection postulate in quantum information theory. One can proceed with L\\"uders postulate (as people in quantum information really do).

  11. Acquired Von Willebrand's Syndrome in Systemic Lupus Erythematosus

    PubMed Central

    Strakhan, Marianna; Gralla, Richard J.; Reed, Louis J.

    2014-01-01

    Acquired von Willebrand syndrome (AVWS) is an uncommon, underdiagnosed, and heterogeneous disease which is increasingly recognized as a cause of bleeding diatheses. Systemic lupus erythematosus (SLE) is an infrequent cause of AVWS. Herein, we report a case of AVWS diagnosed during the initial presentation of SLE in a previously healthy young man with no family history of bleeding diathesis who presented with worsening epistaxis, gastrointestinal bleeding, and anasarca. He was found to have severe anemia and prolonged activated partial thromboplastin time (aPTT) with severely decreased levels of von Willebrand factor (VWF) measurements in addition to markedly decreased factor VIII levels. Further evaluation revealed nephrotic syndrome and interstitial lung disease due to SLE. He initially received combination therapy with intravenous immunoglobulin (IVIG) and von Willebrand factor/factor VIII concentrates without significant improvement. Treatment with steroids, cyclophosphamide, and rituximab was followed by clinical improvement evidenced by cessation of bleeding. The short follow-up did not allow us to definitely prove the therapeutic effect of immunosuppressive treatment on AVWS in SLE patients. This case adds to the literature supporting the relationship between AVWS and SLE and highlights the importance of combination therapy in the treatment of severe AVWS as well as the role of IVIG, cyclophosphamide, and rituximab in AVWS associated with SLE. PMID:25544909

  12. Von Neumann's 'No Hidden Variables' Proof: A Re-Appraisal

    E-print Network

    Jeffrey Bub

    2010-06-02

    Since the analysis by John Bell in 1965, the consensus in the literature is that von Neumann's 'no hidden variables' proof fails to exclude any significant class of hidden variables. Bell raised the question whether it could be shown that any hidden variable theory would have to be nonlocal, and in this sense 'like Bohm's theory.' His seminal result provides a positive answer to the question. I argue that Bell's analysis misconstrues von Neumann's argument. What von Neumann proved was the impossibility of recovering the quantum probabilities from a hidden variable theory of dispersion free (deterministic) states in which the quantum observables are represented as the 'beables' of the theory, to use Bell's term. That is, the quantum probabilities could not reflect the distribution of pre-measurement values of beables, but would have to be derived in some other way, e.g., as in Bohm's theory, where the probabilities are an artefact of a dynamical process that is not in fact a measurement of any beable of the system.

  13. Astronomische Kupferstiche von Gottfried Teuber für Erhard Weigel

    NASA Astrophysics Data System (ADS)

    Herbst, Klaus-Dieter

    Zum Spektrum nichtverbaler Zeugnisse aus der Geschichte der Wissenschaften zählen auch die zahlreichen bildhaften Dokumente, auf denen die Objekte der wissenschaftlichen Untersuchung festgehalten sind, darunter auch die Kupferstiche (später Fotografien), die den astronomischen Büchern und Schriften beigegeben worden sind. Welcher wissenschaftshistorisch relevante Informationsgehalt ist nun solchen nichtverbalen Zeugnissen neben dem künstlerischen Aspekt der Illustration des Textes zuzubilligen? In Form einer Fallstudie soll im Vortrag ein bisher wenig beachteter Aspekt einer Antwort auf diese Frage angerissen werden. Im Rahmen dieser Fallstudie werden einige Kupferstiche aus dem Himmels=Zeiger`` von Erhard W eigel (1625-1699) vorgestellt, seit 1653 Professor für Mathematik an der Universität Jena und maßgeblicher Initiator der Kalenderreform in den protestantischen Ländern von 1699. Die in diesen Stichen enthaltenen Informationen können grob in drei Gruppen eingeteilt werden: A Aussagen zur Astronomie (dargestellte Himmelserscheinung), B Aussagen zur Drucktechnik (und künstlerischen Gestaltung), C Aussagen zur Biographie (des Herstellers bzw. Auftraggebers). Meines Erachtens ist der Aspekt C in der Historiographie bisher nicht erkannt worden. Hierauf soll mit einem Beispiel aufmerksam gemacht werden, wobei es um die Biographien von zwei Personen geht: die des Buchautors (Weigel) und die des Herstellers des Kupferstiches (Gottfried Teuber). Die Auswertung des Beispiels zeigt, daß durch Beachtung der sonst unauffällig erscheinenden Hersteller eines Kupferstiches Ansatzpunkte gefunden werden können, um Material für die noch unzureichend erforschte Beziehung zwischen den Gelehrten aus der ersten Reihe und deren Gehilfen aufzuspüren.

  14. Quantitative Genetics, House Sparrows and a Multivariate

    E-print Network

    Steinsland, Ingelin

    NTNU Quantitative Genetics, House Sparrows and a Multivariate Gaussian Markov Random Field Model Quantitative Genetics, House Sparrows and a Multivariate Gaussian Markov Random Field Model ­ p.1/25 #12;NTNU Quantitative Genetics Quantitative genetics is the study of quantitative characters. It is based

  15. Quantitative Portraits of Lexical Elements Kyo Kageura

    E-print Network

    Quantitative Portraits of Lexical Elements Kyo Kageura Human and Social Information Research quantitative "weighting" of lexical elements are defined, and then draws, quantitative portraits of a few by drawing quantitative portraits of some lexical items using the quantitative measures. 2 Texts and lexica

  16. Tubular von Hippel-Lindau Knockout Protects against Rhabdomyolysis-Induced AKI

    PubMed Central

    Fähling, Michael; Mathia, Susanne; Paliege, Alexander; Koesters, Robert; Mrowka, Ralf; Peters, Harm; Persson, Pontus Börje; Neumayer, Hans-Hellmut; Bachmann, Sebastian

    2013-01-01

    Renal hypoxia occurs in AKI of various etiologies, but adaptation to hypoxia, mediated by hypoxia-inducible factor (HIF), is incomplete in these conditions. Preconditional HIF activation protects against renal ischemia-reperfusion injury, yet the mechanisms involved are largely unknown, and HIF-mediated renoprotection has not been examined in other causes of AKI. Here, we show that selective activation of HIF in renal tubules, through Pax8-rtTA–based inducible knockout of von Hippel-Lindau protein (VHL-KO), protects from rhabdomyolysis-induced AKI. In this model, HIF activation correlated inversely with tubular injury. Specifically, VHL deletion attenuated the increased levels of serum creatinine/urea, caspase-3 protein, and tubular necrosis induced by rhabdomyolysis in wild-type mice. Moreover, HIF activation in nephron segments at risk for injury occurred only in VHL-KO animals. At day 1 after rhabdomyolysis, when tubular injury may be reversible, the HIF-mediated renoprotection in VHL-KO mice was associated with activated glycolysis, cellular glucose uptake and utilization, autophagy, vasodilation, and proton removal, as demonstrated by quantitative PCR, pathway enrichment analysis, and immunohistochemistry. In conclusion, a HIF-mediated shift toward improved energy supply may protect against acute tubular injury in various forms of AKI. PMID:23970125

  17. News Note: Quantitative Imaging Program

    Cancer.gov

    NCI is launching a new program to qualify existing NCI designated Cancer Centers with an added attribute -- as Centers of Quantitative Imaging Excellence. This program will significantly decrease potential variability in image procedures done while a pati

  18. Quantitative analysis of masculinity perceptions 

    E-print Network

    Cima, Brian Norman

    2002-01-01

    This study was conducted using a modified version of the Brannon's Masculinity index, designed to measure quantitatively the ideologies of American masculinity. Included is an extensive literature review and an explanation ...

  19. Defective dimerization of von Willebrand factor subunits due to a Cys-> Arg mutation in type IID von Willebrand disease.

    PubMed Central

    Schneppenheim, R; Brassard, J; Krey, S; Budde, U; Kunicki, T J; Holmberg, L; Ware, J; Ruggeri, Z M

    1996-01-01

    The same heterozygous T -> C transition at nt 8567 of the von Willebrand factor (vWF) transcript was found in two unrelated patients with type III) von Willebrand disease, with no other apparent abnormality. In one family, both alleles were normal in the parents and one sister; thus, the mutation originated de novo in the proposita. The second patient also had asymptomatic parents who, however, were not available for study. The structural consequences of the identified mutation, resulting in the CyS2010 -> Arg substitution, were evaluated by expression of the vWF carboxyl-terminal domain containing residues 1366-2050. Insect cells infected with recombinant baculovirus expressing normal vWF sequence secreted a disulfide linked dimeric molecule with an apparent molecular mass of 150 kDa before reduction, yielding a single band of 80 kDa after disulfide bond reduction. In contrast, cells expressing the mutant fragment secreted a monomeric molecule of apparent molecular mass of 80 kDa, which remained unchanged after reduction. We conclude that CyS2010 is essential for normal dimerization of vWF subunits through disulfide bonding of carboxyl-terminal domains and that a heterozygous mutation in the corresponding codon is responsible for defective multimer formation in type III) von Willebrand disease. Images Fig. 1 Fig. 2 Fig. 4 PMID:8622978

  20. Quantitative photoacoustic imaging in radiative transport regime

    E-print Network

    Ren, Kui

    Quantitative photoacoustic imaging in radiative transport regime Alexander V. Mamonov Kui Ren July 6, 2012 Abstract The objective of quantitative photoacoustic tomography (QPAT) is to reconstruct. Key words. Quantitative photoacoustic tomography (QPAT), sectional photoacoustic tomogra- phy

  1. Developing Geoscience Students' Quantitative Skills

    NASA Astrophysics Data System (ADS)

    Manduca, C. A.; Hancock, G. S.

    2005-12-01

    Sophisticated quantitative skills are an essential tool for the professional geoscientist. While students learn many of these sophisticated skills in graduate school, it is increasingly important that they have a strong grounding in quantitative geoscience as undergraduates. Faculty have developed many strong approaches to teaching these skills in a wide variety of geoscience courses. A workshop in June 2005 brought together eight faculty teaching surface processes and climate change to discuss and refine activities they use and to publish them on the Teaching Quantitative Skills in the Geosciences website (serc.Carleton.edu/quantskills) for broader use. Workshop participants in consultation with two mathematics faculty who have expertise in math education developed six review criteria to guide discussion: 1) Are the quantitative and geologic goals central and important? (e.g. problem solving, mastery of important skill, modeling, relating theory to observation); 2) Does the activity lead to better problem solving? 3) Are the quantitative skills integrated with geoscience concepts in a way that makes sense for the learning environment and supports learning both quantitative skills and geoscience? 4) Does the methodology support learning? (e.g. motivate and engage students; use multiple representations, incorporate reflection, discussion and synthesis) 5) Are the materials complete and helpful to students? 6) How well has the activity worked when used? Workshop participants found that reviewing each others activities was very productive because they thought about new ways to teach and the experience of reviewing helped them think about their own activity from a different point of view. The review criteria focused their thinking about the activity and would be equally helpful in the design of a new activity. We invite a broad international discussion of the criteria(serc.Carleton.edu/quantskills/workshop05/review.html).The Teaching activities can be found on the Teaching Quantitative Skills in the Geosciences website (serc.Carleton.edu/quantskills/). In addition to the teaching activity collection (85 activites), this site contains a variety of resources to assist faculty with the methods they use to teach quantitative skills at both the introductory and advanced levels; information about broader efforts in quantitative literacy involving other science disciplines, and a special section of resources for students who are struggling with their quantitative skills. The site is part of the Digital Library for Earth Science Education and has been developed by geoscience faculty in collaboration with mathematicians and mathematics educators with funding from the National Science Foundation.

  2. Reevaluation of McCulloch-Pitts-von Neumann's clock.

    PubMed

    Ohta, Hiroyuki

    2015-01-01

    In neuroscience research, a firing pattern expression, called a firing snapshot, defined by firing counts of multiple neurons in discrete time-bin is frequently used. However, the firing pattern expression over multiple neurons requires synchronization commonly known as a "central clock" in computation circuits to externally control or observe multi-neuron firing. Since it is not appropriate to hypothesize the central clock in the brain, we have to reconsider the synchronization assumption. We found the historical origins of central clock synchronization in the works of McCulloch, Pitts and von Neumann and propose an alternative perspective to study neural processing without the central clock. In the "First draft of a report on the EDVAC" known as the first proposal of store-program type computer, von Neumann incorporated McCulloch and Pitts' arbitrary assumption of constant synaptic delay into the logical circuit modeling. He introduced a constant pulse delay stabilized by a central clock to synchronize multiple pulse lines. This constant delay carried over to automaton theory by von Neumann and then theoretical neuroscience as an integral part of distributed representation and firing pattern analysis. Instead, we propose a rethinking of neuronal processing by focusing on a variable synaptic delay. We review neuron-type dependent differences and point out that the maximum inter-stimulus interval which can affect the last stimulus response is longer than the minimum inter-spike interval, indicating the possibility of asynchronous input summation without a firing rate level clock. This fundamental baseline contributes to the investigation of time consuming processes: e.g., the compression of appositional synaptic inputs with duration into a single firing. PMID:25458264

  3. Spin torque oscillator neuroanalog of von Neumann's microwave computer.

    PubMed

    Hoppensteadt, Frank

    2015-10-01

    Frequency and phase of neural activity play important roles in the behaving brain. The emerging understanding of these roles has been informed by the design of analog devices that have been important to neuroscience, among them the neuroanalog computer developed by O. Schmitt and A. Hodgkin in the 1930s. Later J. von Neumann, in a search for high performance computing using microwaves, invented a logic machine based on crystal diodes that can perform logic functions including binary arithmetic. Described here is an embodiment of his machine using nano-magnetics. Electrical currents through point contacts on a ferromagnetic thin film can create oscillations in the magnetization of the film. Under natural conditions these properties of a ferromagnetic thin film may be described by a nonlinear Schrödinger equation for the film's magnetization. Radiating solutions of this system are referred to as spin waves, and communication within the film may be by spin waves or by directed graphs of electrical connections. It is shown here how to formulate a STO logic machine, and by computer simulation how this machine can perform several computations simultaneously using multiplexing of inputs, that this system can evaluate iterated logic functions, and that spin waves may communicate frequency, phase and binary information. Neural tissue and the Schmitt-Hodgkin, von Neumann and STO devices share a common bifurcation structure, although these systems operate on vastly different space and time scales; namely, all may exhibit Andronov-Hopf bifurcations. This suggests that neural circuits may be capable of the computational functionality as described by von Neumann. PMID:26135205

  4. Otto von Guericke and 17th century cosmology

    NASA Astrophysics Data System (ADS)

    Knobloch, Eberhard

    Otto von Guericke's scientific method was based on reason and experimental science. His cosmology was embedded in theology and can be interpreted as a refutation of Descartes' worldview. He used Nicolaus Cusanus' theory of quantities in order to characterize space. The notion of space has to be distinguished from that of world or heaven. Forces play a crucial role in this respect described by Athanasius Kircher in his "Celestial Journey". Guericke read this work very diligently. In spite of some obvious similarities between Guericke's and Newton's scientific aims and methods there are crucial differences between the scientific convictions and results of these scholars.

  5. The von Karman equations for plates with residual strain

    E-print Network

    Lewicka, Marta; Pakzad, Reza

    2010-01-01

    We provide a derivation of the Foppl-von Karman equations for the shape of and stresses in an elastic plate with residual strains. These might arise from a range of causes: inhomogeneous growth, plastic deformation, swelling or shrinkage driven by solvent absorption. Our analysis gives rigorous bounds on the convergence of the three dimensional equations of elasticity to the low-dimensional description embodied in the plate-like description of laminae and thus justifies a recent formulation of the problem to the shape of growing leaves. It also formalizes a procedure that can be used to derive other low-dimensional descriptions of active materials.

  6. The von Karman equations for plates with residual strain

    E-print Network

    Marta Lewicka; L. Mahadevan; Reza Pakzad

    2010-02-11

    We provide a derivation of the Foppl-von Karman equations for the shape of and stresses in an elastic plate with residual strains. These might arise from a range of causes: inhomogeneous growth, plastic deformation, swelling or shrinkage driven by solvent absorption. Our analysis gives rigorous bounds on the convergence of the three dimensional equations of elasticity to the low-dimensional description embodied in the plate-like description of laminae and thus justifies a recent formulation of the problem to the shape of growing leaves. It also formalizes a procedure that can be used to derive other low-dimensional descriptions of active materials.

  7. Karl Ernst von Baer (1792-1876) and evolution.

    PubMed

    Brauckmann, Sabine

    2012-01-01

    The research program of Karl Ernst von Baer (1792-1876) intended to enhance the comparative approach of animal classification by demonstrating vertebrate affinities (homology). Baer visualized his ideas on development and evolution with an unpublished figure of a branching tree. To buttress his reflections on how species-specific embryogenesis produces a branching tree, he worked out a cladogram-like chart, depicting the ontogeny and phylogeny of vertebrate embryos. For Baer, changes in development were responsible for changes in phenotype. I will offer a new interpretation of Baer's ideas about evolution showing that he believed in the transformation of species and announced such views publicly. PMID:23319342

  8. von Neumann Lattices in Finite Dimensions Hilbert Spaces

    E-print Network

    M. Revzen; F. C. Khanna

    2008-05-07

    The prime number decomposition of a finite dimensional Hilbert space reflects itself in the representations that the space accommodates. The representations appear in conjugate pairs for factorization to two relative prime factors which can be viewed as two distinct degrees freedom. These, Schwinger's quantum degrees of freedom, are uniquely related to a von Neumann lattices in the phase space that characterizes the Hilbert space and specifies the simultaneous definitions of both (modular) positions and (modular) momenta. The area in phase space for each quantum state in each of these quantum degrees of freedom, is shown to be exactly $h$, Planck's constant.

  9. von Kármán Vortex Street within an Impacting Drop

    NASA Astrophysics Data System (ADS)

    Thoraval, Marie-Jean; Takehara, Kohsei; Etoh, Takeharu Goji; Popinet, Stéphane; Ray, Pascal; Josserand, Christophe; Zaleski, Stéphane; Thoroddsen, Sigurdur T.

    2012-06-01

    The splashing of a drop impacting onto a liquid pool produces a range of different sized microdroplets. At high impact velocities, the most significant source of these droplets is a thin liquid jet emerging at the start of the impact from the neck that connects the drop to the pool. We use ultrahigh-speed video imaging in combination with high-resolution numerical simulations to show how this ejecta gives way to irregular splashing. At higher Reynolds numbers, its base becomes unstable, shedding vortex rings into the liquid from the free surface in an axisymmetric von Kármán vortex street, thus breaking the ejecta sheet as it forms.

  10. Databases and Inter-Connectivity in Ground-Based Astronomy T. von Hippel and C. M. Mountain

    E-print Network

    Databases and Inter-Connectivity in Ground-Based Astronomy T. von Hippel and C. M. Mountain Gemini-CONNECTIVITY IN GROUND-BASED ASTRONOMY T. von Hippel, C. M. Mountain* Gemini Observatory, 670 N. A'ohoku Place, Hilo

  11. Assessment of long-term habituation correlates in event-related potentials using a von Mises model.

    PubMed

    Mortezapouraghdam, Z; Haab, L; Corona-Strauss, F I; Steidl, G; Strauss, D J

    2015-05-01

    In our preliminary work we were able to demonstrate habituation by analyzing attention correlates in single-trial sequences of auditory event-related potentials (ERPs). Despite different quantitative studies of instantaneous phase of ERPs in long-term habituation, there have been no former studies in generative process underlying the distribution of instantaneous phase information in the context of long-term habituation and its relation to attentional binding. For this means we used a von Mises model, representing the phase information over a set of single trial responses. Additionally we use a quantitative neurofunctional model to predict the dynamics of the instantaneous phase in single-trial ERP data during the long-term habituation. Measured habituation data is used to cross-validate the model's prediction. We conclude that the described method allows for an assessment of dynamic changes in the course of long-term habituation. The results also reinforce our neurofunctional multiscale model of long-term habituation and show the applicability of the described method for the experimental/clinical neurodiagnostic assessment of attentional binding. PMID:25361510

  12. Zwischen Physik und Philosophie Ino Weber, Carl Friedrich von Weizscker, Ein Leben zwischen Physik und Philosophie

    E-print Network

    Falge, Eva

    Zwischen Physik und Philosophie Ino Weber, Carl Friedrich von Weizsäcker, Ein Leben zwischen Physik Philosoph? Die Einordnung Carl Friedrich von Weizsäckers in klassische Kategorien fällt schwer, denn sein zur Quantenphysik. Die noch junge Quantenmechanik der 1920er-Jahre warf ganz neue methodische und

  13. 78 FR 61948 - Culturally Significant Objects Imported for Exhibition Determinations: “Franz von Stuck”

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-07

    ... Culturally Significant Objects Imported for Exhibition Determinations: ``Franz von Stuck'' SUMMARY: Notice is..., I hereby determine that the objects to be included in the exhibition ``Franz von Stuck,'' imported from abroad for temporary exhibition within the United States, are of cultural significance....

  14. DGPF Tagungsband 18 / 2009 Genauigkeitsanalyse der 3D-Trajektorie von Mini-UAVs

    E-print Network

    DGPF Tagungsband 18 / 2009 407 Genauigkeitsanalyse der 3D-Trajektorie von Mini-UAVs HENRI EISENBEISS 1 , WERNER STEMPFHUBER 1 & MICHAEL KOLB 2 Zusammenfassung: Nach einer Einführung über UAVs und einer Beschreibung von ver- schiedenen UAV-Systemen wird im vorliegenden Artikel eine Methode für die

  15. Aktualisierte Liste der Geckos von Neuguinea Gekkota, 5: 33-64.

    E-print Network

    Aktualisierte Liste der Geckos von Neuguinea Gekkota, 5: 33-64. Aktualisierte Liste der Geckos von of Nactus are endemic to this island. The comparatively low number of endemic gecko species and the absence of endemic genera might indicate that geckos arrived in New Guinea relatively late. Our preliminary list also

  16. In memory of Eugene (Jen?) von Gothard: a pioneering nineteenth century Hungarian astrophysicist

    NASA Astrophysics Data System (ADS)

    Vincze, Ildik? J.; Jankovics, István

    2012-07-01

    Eugene von Gothard was a Hungarian engineer/scientist, instrument-maker and astrophysicist who founded the Herény Astrophysical Observatory in 1881 and carried out pioneering work in astronomical photography and spectroscopy. In this paper we provide biographical material about von Gothard and describe his observatory, before discussing his astronomical observations and the contribution that hemade to the early development of astrophysics.

  17. Entgegnung auf einen von Prof. Ostwald ber das Glck gehaltenen Boltzmann, Ludwig

    E-print Network

    Gertz, Michael

    Entgegnung auf einen von Prof. Ostwald über das Glück gehaltenen Vortrag Boltzmann, Ludwig Originalveröffentlichung in: Boltzmann, Ludwig (Hrsg.): Populäre Schriften. Leipzig 1905, pp. 364-378 URL: http zur Mathematikgeschichte Autor: Boltzmann, Ludwig (1844­1906) Titel: Entgegnung auf einen von Prof

  18. Von Charles Darwin zu Oswald Heer (1809-1883), dem ersten Direktor des

    E-print Network

    Zürich, Universität

    Von Charles Darwin zu Oswald Heer (1809-1883), dem ersten Direktor des Botanischen Gartens Zürich Dieses Jahr wird Charles Darwin weltweit geehrt. Wir feiern den 200. Geburtstag eines grossen und in der Bibliothek der Botanischen Institute Einblicke in die Welt von ,,Charles Darwin als

  19. Volumenerhaltung von Billiards Im Folgenden betrachten wir ein Orbitstck, so dass der Punkt (s, )

    E-print Network

    Gunesch, Roland

    von (s, ) abhängige Variable ist. Wenn wir die Koordinaten umschreiben mittels r := - cos und analog r := - cos , dann vereinfachen sich die Gleichungen der Erzeugendenfunktion: s H(s, s ) = r , s H(s, s ) = -r. Wenn dann wie vorhin (s , ) das Bild unter f von (s, ) ist, dann können wir die erste Gleichung

  20. An Alternative Perspective on von Winterfeldt et al.'s (1997) Test of Consequence Monotonicity

    ERIC Educational Resources Information Center

    Ho, Moon-Ho R.; Regenwetter, Michel; Niederee, Reinhard; Heyer, Dieter

    2005-01-01

    D. von Winterfeldt, N.-K. Chung, R. D. Luce, and Y. Cho (see record 1997-03378-008) provided several tests for consequence monotonicity of choice or judgment, using certainty equivalents of gambles. The authors reaxiomatized consequence monotonicity in a probabilistic framework and reanalyzed von Winterfeldt et al.'s main experiment via a…

  1. Structural Basis of Regulation of von Willebrand Factor Binding to Glycoprotein Ib*

    E-print Network

    Springer, Timothy A.

    of bleeding disorders. Activation by elongational flow of von Willebrand factor (VWF) is critical for primary hemostasis. Mutations causing type 2B von Willebrand disease (VWD), platelet-type VWD (PT-VWD), and tensile force each increase affinity of the VWF A1 domain and platelet glycoprotein Ib (GPIb ) for one another

  2. The Fate of Western Civilization: G. H. von Wright's Reflections on Science, Technology, and Global Society

    ERIC Educational Resources Information Center

    Heikkero, Topi

    2004-01-01

    This article introduces the central ideas of G. H. von Wright's cultural philosophy concerning the techno-scientific form of life. Georg Henrik von Wright (1916-2003) was best known for his achievements in the field of modal logic and for his association with Ludwig Wittgenstein. However, his work also included a critical analysis of science and…

  3. VON BERTALANFFY GROWTH CURVES FOR STRIPED MARLIN, TETRAPTURUS AUDAX, AND BLUE MARLIN, MAKAIRA NIGRICANS,

    E-print Network

    VON BERTALANFFY GROWTH CURVES FOR STRIPED MARLIN, TETRAPTURUS AUDAX, AND BLUE MARLIN, MAKAIRA of striped marlin, Tetrapturus audax, and blue marlin, Makaira nigricans, was described by fitting von-groups, by quarters, through the Hawaiian longline fishery from 1960 to 1970. For striped marlin, the sexes grew

  4. Press Release Von Roll Inova to build the UK's largest energy-from-waste

    E-print Network

    Columbia University

    Press Release Von Roll Inova to build the UK's largest energy-from-waste plant Zürich, September, 1 Roll Inova will build the UK's largest energy-from-waste facility. The contract is worth approximately and energy recovery. Apart from building and commissioning the plant, Von Roll Inova's scope of delivery also

  5. Load Balanced Birkho -von Neumann Switches, Part I: One-stage Bu ering

    E-print Network

    Chang, Cheng-Shang

    Load Balanced Birkho#11;-von Neumann Switches, Part I: One-stage Bu#11;ering Cheng-Shang Chang-stage switching fabrics and one-stage bu#11;ering. The #12;rst stage performs load balancing, while the second stage is a Birkho#11;-von Neumann input-bu#11;ered switch that performs switching for load balanced tra

  6. von Baer's law for the ages: lost and found principles of developmental evolution.

    PubMed

    Abzhanov, Arhat

    2013-12-01

    In 1828, Karl Ernst von Baer formulated a series of empirically defined rules, which became widely known as the 'Law of Development' or 'von Baer's law of embryology'. This was one the most significant attempts to define the principles that connected morphological complexity and embryonic development. Understanding this relation is central to both evolutionary biology and developmental genetics. Von Baer's ideas have been both a source of inspiration to generations of biologists and a target of continuous criticism over many years. With advances in multiple fields, including paleontology, cladistics, phylogenetics, genomics, and cell and developmental biology, it is now possible to examine carefully the significance of von Baer's law and its predictions. In this review, I argue that, 185 years after von Baer's law was first formulated, its main concepts after proper refurbishing remain surprisingly relevant in revealing the fundamentals of the evolution-development connection, and suggest that their explanation should become the focus of renewed research. PMID:24120296

  7. Karl ernst von Baer's 'Uber Entwickelungsgeschichte der Thiere II' and its unpublished drawings.

    PubMed

    Tammiksaar, Erki; Brauckmann, Sabine

    2004-01-01

    In 1828 Karl Ernst von Baer (1792-1876) published his seminal Uber Entwickelungsgeschichte der Thiere. Beobachtung und Reflexion. In the preface he announced that a second volume with one copper plate would be finished 'in a few weeks'. However, it took nine years until the unfinished second volume was released, with four copperplates. In his 'Autobiography', von Baer did not clarify the reasons why he did not finish his research program of comparative embryology. The paper attempts to elucidate them, furnished by archival documents and von Baer's unpublished embryological drawings. Our sketch of a few figures will show that (1) von Baer searched for 'analogies' (homologies) as a unifying principle and (2) explained the mechanisms of embryogenesis by physiological reasoning (electromagnetism). The main objective is to show that technical problems in illustrating and conceptual difficulties impeded von Baer's ambitious research program. PMID:16302690

  8. [Correspondence between Winkler and Von Monakow. I. Personal affairs and visions].

    PubMed

    Koehler, P J; Jagella, C

    2001-12-22

    Cornelis Winkler (1855-1941) and Constantin von Monakow (1853-1930) are considered to be pioneers in neurology in the Netherlands and Switzerland respectively. Winkler became the first professor of Psychiatry and Neurology in Utrecht (1893) and Von Monakow the first professor of Neurology in Zürich (1894). They first met in Amsterdam (1907). Many other meetings followed and they maintained a lively correspondence. Winkler's letters to Von Monakow (1908-1927) are archived at the Institute of Medical History in Zürich and are the principal source for two articles. This first article considers personal affairs and views: the friendly relationship, the experiences during World War I, the personal struggle with respect to the emancipation of neurology at the start of the 19th century, Von Monakow's manuscript of Vita Mea and finally Von Monakow's succession. PMID:11789152

  9. Further evidence for recessive inheritance of von Willebrand disease with abnormal binding of von Willebrand factor to factor VIII.

    PubMed

    López-Fernández, M F; Blanco-López, M J; Castiñeira, M P; Batlle, J

    1992-05-01

    A new family with a bleeding diathesis and FVIII deficiency secondary to abnormal binding of von Willebrand factor (vWF) to factor VIII (FVIII) is described. Two propositi of this family, an 18-year-old male and a 33-year-old female, both with a history of epistaxis, bruising, bleeding from the gums, epistaxis, hemarthrosis, and hematoma, were analyzed. Also additional members of the same family with no bleeding history were also studied. The propositi showed normal vWF activities, low FVIII activity; one of them had been diagnosed as having hemophilia A and the other was a hemophilia A carrier. Both showed a very poor response to treatment with FVIII concentrates and desmopressin (DDAVP) but a good clinical response to cryoprecipitate. APTT was prolonged and no inhibitory activity was noticeable in their plasmas. Thirty-five units per kilogram body weight of Hemofil M was infused to both propositi and FVIII reached basal level within 60 minutes of the infusion. No FVIII response at all was observed in the female after intravenous DDAVP administration. However, the male who received the infusion of 35 U/kg body weight of Humate-P achieved a normal FVIII level that was maintained for 12 hours. Multimeric analysis of vWF was normal in all the members studied. Von Willebrand factor domain for FVIII binding was assayed in the two propositi and in six other members of the same family by using a non-isotopic and sensitive method, a modification of the one previously described, using the Hemofil M concentrate as exogenous FVIII. The data obtained showed that both propositi had similar binding to that observed by using plasma of a patient with severe von Willebrand disease. Furthermore, five siblings had a decreased binding of vWF to FVIII, when compared with plasma from normal individuals or patients with hemophilia A. We also observed that, for screening purpose, the ratio of bound FVIII/immobilized vWF (at saturation of the anti-vWF and offering of 1 U/ml of exogenous FVIII) distinguished two levels of abnormality (normal range 0.70-1.15, propositi 0.004-0.007, and remaining members affected 0.25-0.42). The most probable explanation is that the propositi are homozygous or double heterozygous, the other five siblings affected being heterozygous for a recessive vWF defect. This more accessible assay presented here may be of help in routine analysis for diagnosing this type of von Willebrand disease, which has important implications for therapy and genetic counseling. PMID:1566742

  10. Otto-von-Guericke Universitt Magdeburg Delft University of Technology Institut fr Verfahrenstechnik DelftChemTech

    E-print Network

    Luding, Stefan

    Otto-von-Guericke Universität Magdeburg Delft University of Technology Institut für in Delft, the Netherlands. The research is performed during February-August 2008 at the Otto-von-Guericke, for a possibility to do my master thesis abroad. He contacted Prof. Tomas at the Otto-von-Guericke Universität

  11. Echtzeitfhigkeit fr Mesh-Netzwerke in der Automatisierung Andre Herms, Otto-von-Guericke Univ. Magdeburg, Institut fr Verteilte Systeme

    E-print Network

    Echtzeitfähigkeit für Mesh-Netzwerke in der Automatisierung Andre Herms, Otto-von-Guericke Univ. Magdeburg, Institut für Verteilte Systeme Georg Lukas, Otto-von-Guericke Univ. Magdeburg, Institut für Handhabbarkeit und höhere Ausfallsicherheit bringen Mesh-Netzwerke, die bereits von einigen Herstellern angeboten

  12. Solution of von-Karman dynamic non-linear plate equations using a pseudo-spectral method

    E-print Network

    Yosibash, Zohar

    Solution of von-Karman dynamic non-linear plate equations using a pseudo-spectral method R.M. Kirby. Keywords: von-Karman plate model; Pseudo-spectral methods; Modeling errors 1. Introduction Plates of Kirchhoff­Love (derived under the assumption of a small strain situation) is the von-Karman plate model

  13. Global Stabilization of the von K arm an Plate With Boundary Feedback Acting Via Bending Moments Only

    E-print Network

    for the von Karman plate in recent years, to our knowledge, no results deal with the boundary conditions (1 controllability and stabilization for the von Karman plate with higher-order boundary conditions Global Stabilization of the von K arm an Plate With Boundary Feedback Acting Via Bending Moments

  14. Vierte Satzung zur nderung der Satzung der Ernst-Moritz-Arndt-Universitt Greifswald fr das Hochschulauswahlverfahren von Studienanfngern in

    E-print Network

    Greifswald, Ernst-Moritz-Arndt-Universität

    Hochschulauswahlverfahren von Studienanfängern in Studiengängen mit örtlich festgesetzten Zulassungszahlen Vom 31. Mai 2013 Aufgrund von § 4 Absatz 5 bis 7 des Gesetzes über die Zulassung zum Hochschulstudium in Mecklenburg Hochschulauswahlverfahren von Studienanfängern in Studiengängen mit örtlich festgesetzten Zulassungszahlen vom 27. Januar

  15. Zweite Satzung zur nderung der Satzung der Ernst-Moritz-Arndt-Universitt Greifswald ber die Vergabe von

    E-print Network

    Greifswald, Ernst-Moritz-Arndt-Universität

    Vergabe von Leistungsbezügen an Professor/inn/en und den/ die Rektor/in (Leistungsbezüge-Satzung) vom 26. Februar 2010 Aufgrund von § 5 der Verordnung über Leistungsbezüge sowie Forschungs- und Lehrzulagen für folgt geändert: Dem § 4 Absatz 8 wird folgender Satz angefügt: ,,Von den dort genannten Fristen kann aus

  16. Dritte Satzung zur nderung der Satzung der Ernst-Moritz-Arndt-Universitt Greifswald ber die Vergabe von

    E-print Network

    Greifswald, Ernst-Moritz-Arndt-Universität

    Vergabe von Leistungsbezügen an Professor/inn/en und den/die Rektor/in (Leistungsbezüge-Satzung) Vom 22. September 2014 Aufgrund von § 5 der Verordnung über Leistungsbezüge sowie Forschungs- und Lehrzulagen für Bildungsministeriums und vorbehaltlich § 10 Abs. 2 in der Höhe von in der Regel 32 % des Grundgehalts der Besoldung W 3

  17. Interdisziplinres Wolfgang Khler-Zentrum der Humboldt-Universitt zu Berlin zur Erforschung von Konflikten in In-

    E-print Network

    Röder, Beate

    Interdisziplinäres Wolfgang Köhler-Zentrum der Humboldt- Universität zu Berlin zur Erforschung von- schung von Konflikten in Intelligenten Systemen Herausgeber: Der Präsident der Humboldt-Universität zu-Universität zu Berlin zur Erforschung von Konflikten in Intelligenten Systemen Präambel Aufgrund des § 25 Abs. 5

  18. Towards quantitative assessment of calciphylaxis

    NASA Astrophysics Data System (ADS)

    Deserno, Thomas M.; Sárándi, István.; Jose, Abin; Haak, Daniel; Jonas, Stephan; Specht, Paula; Brandenburg, Vincent

    2014-03-01

    Calciphylaxis is a rare disease that has devastating conditions associated with high morbidity and mortality. Calciphylaxis is characterized by systemic medial calcification of the arteries yielding necrotic skin ulcerations. In this paper, we aim at supporting the installation of multi-center registries for calciphylaxis, which includes a photographic documentation of skin necrosis. However, photographs acquired in different centers under different conditions using different equipment and photographers cannot be compared quantitatively. For normalization, we use a simple color pad that is placed into the field of view, segmented from the image, and its color fields are analyzed. In total, 24 colors are printed on that scale. A least-squares approach is used to determine the affine color transform. Furthermore, the card allows scale normalization. We provide a case study for qualitative assessment. In addition, the method is evaluated quantitatively using 10 images of two sets of different captures of the same necrosis. The variability of quantitative measurements based on free hand photography is assessed regarding geometric and color distortions before and after our simple calibration procedure. Using automated image processing, the standard deviation of measurements is significantly reduced. The coefficients of variations yield 5-20% and 2-10% for geometry and color, respectively. Hence, quantitative assessment of calciphylaxis becomes practicable and will impact a better understanding of this rare but fatal disease.

  19. A Quantitative Infrared Spectroscopy Experiment.

    ERIC Educational Resources Information Center

    Krahling, Mark D.; Eliason, Robert

    1985-01-01

    Although infrared spectroscopy is used primarily for qualitative identifications, it is possible to use it as a quantitative tool as well. The use of a standard curve to determine percent methanol in a 2,2,2-trifluoroethanol sample is described. Background information, experimental procedures, and results obtained are provided. (JN)

  20. Book Reviews Quantitative Syntax Analysis

    E-print Network

    between QL and computational linguistics. Quantitative Syntax Analysis is a recent work on QL by Reinhard linguistics in general. © 2012 Association for Computational Linguistics In the first chapter, K¨ohler points when it comes to processing real texts. And that is why in computational linguistics, "devout executors

  1. Quantitative Research in Written Composition.

    ERIC Educational Resources Information Center

    Gebhard, Ann O.

    Offered as an introductory guide to teachers interested in approaching written English as a "second dialect" that students must master, this review covers quantitative investigations of written language. The first section deals with developmental studies, describing how a variety of researchers have related written structure to writer maturity.…

  2. Quantitative Risk Management Rudiger Frey

    E-print Network

    Frey, Rüdiger

    of specific challenges in credit risk management which are less relevant in market risk. · ScarcityLecture Quantitative Risk Management R¨udiger Frey Universit¨at Leipzig Wintersemester 2010 risk management C. Introduction to Portfolio Credit Derivatives c 2010 (Frey) 1 #12;A. Introduction

  3. The von Neumann model of measurement in quantum mechanics

    SciTech Connect

    Mello, Pier A.

    2014-01-08

    We describe how to obtain information on a quantum-mechanical system by coupling it to a probe and detecting some property of the latter, using a model introduced by von Neumann, which describes the interaction of the system proper with the probe in a dynamical way. We first discuss single measurements, where the system proper is coupled to one probe with arbitrary coupling strength. The goal is to obtain information on the system detecting the probe position. We find the reduced density operator of the system, and show how Lüders rule emerges as the limiting case of strong coupling. The von Neumann model is then generalized to two probes that interact successively with the system proper. Now we find information on the system by detecting the position-position and momentum-position correlations of the two probes. The so-called 'Wigner's formula' emerges in the strong-coupling limit, while 'Kirkwood's quasi-probability distribution' is found as the weak-coupling limit of the above formalism. We show that successive measurements can be used to develop a state-reconstruction scheme. Finally, we find a generalized transform of the state and the observables based on the notion of successive measurements.

  4. Von Braun Rocket Team at Fort Bliss, Texas

    NASA Technical Reports Server (NTRS)

    1940-01-01

    The German Rocket Team, also known as the Von Braun Rocket Team, poses for a group photograph at Fort Bliss, Texas. After World War II ended in 1945, Dr. Wernher von Braun led some 120 of his Peenemuende Colleagues, who developed the V-2 rocket for the German military during the War, to the United Sttes under a contract to the U.S. Army Corps as part of Operation Paperclip. During the following five years the team worked on high altitude firings of the captured V-2 rockets at the White Sands Missile Range in New Mexico, and a guided missile development unit at Fort Bliss, Texas. In April 1950, the group was transferred to the Army Ballistic Missile Agency (ABMA) at Redstone Arsenal in Huntsville, Alabama, and continued to work on the development of the guided missiles for the U.S. Army until transferring to a newly established field center of the National Aeronautic and Space Administration (NASA), George C. Marshall Space Flight Center (MSFC).

  5. Attractors and Long Time Behavior of von Karman Thermoelastic Plates

    SciTech Connect

    Chueshov, Igor Lasiecka, Irena

    2008-10-15

    This paper undertakes a study of asymptotic behavior of solutions corresponding to von Karman thermoelastic plates. A distinct feature of the work is that the model considered has no added dissipation-particularly mechanical dissipation typically added to plate equation when long time-behavior is considered. Thus, the model consists of undamped oscillatory plate equation strongly coupled with heat equation. Nevertheless we are able to show that the ultimate (asymptotic) behavior of the von Karman evolution is described by finite dimensional global attractor. In addition, the obtained estimate for the dimension and the size of the attractor are independent of the rotational inertia parameter {gamma} and heat/thermal capacity {kappa}, where the former is known to change the character of dynamics from hyperbolic ({gamma}>0) to parabolic like ({gamma}=0). Other properties of attractors such as additional smoothness and upper-semicontinuity with respect to parameters {gamma} and {kappa} are also established. The main ingredients of the proofs are (i) sharp regularity of Airy's stress function, and (ii) newly developed (Chueshov and Lasiecka in Memoirs of AMS, in press) 'compensated' compactness methods applicable to non-compact dynamics.

  6. von Willebrand factor, Jedi knight of the bloodstream.

    PubMed

    Springer, Timothy A

    2014-08-28

    When blood vessels are cut, the forces in the bloodstream increase and change character. The dark side of these forces causes hemorrhage and death. However, von Willebrand factor (VWF), with help from our circulatory system and platelets, harnesses the same forces to form a hemostatic plug. Force and VWF function are so closely intertwined that, like members of the Jedi Order in the movie Star Wars who learn to use "the Force" to do good, VWF may be considered the Jedi knight of the bloodstream. The long length of VWF enables responsiveness to flow. The shape of VWF is predicted to alter from irregularly coiled to extended thread-like in the transition from shear to elongational flow at sites of hemostasis and thrombosis. Elongational force propagated through the length of VWF in its thread-like shape exposes its monomers for multimeric binding to platelets and subendothelium and likely also increases affinity of the A1 domain for platelets. Specialized domains concatenate and compact VWF during biosynthesis. A2 domain unfolding by hydrodynamic force enables postsecretion regulation of VWF length. Mutations in VWF in von Willebrand disease contribute to and are illuminated by VWF biology. I attempt to integrate classic studies on the physiology of hemostatic plug formation into modern molecular understanding, and point out what remains to be learned. PMID:24928861

  7. von Willebrand factor, Jedi knight of the bloodstream

    PubMed Central

    2014-01-01

    When blood vessels are cut, the forces in the bloodstream increase and change character. The dark side of these forces causes hemorrhage and death. However, von Willebrand factor (VWF), with help from our circulatory system and platelets, harnesses the same forces to form a hemostatic plug. Force and VWF function are so closely intertwined that, like members of the Jedi Order in the movie Star Wars who learn to use “the Force” to do good, VWF may be considered the Jedi knight of the bloodstream. The long length of VWF enables responsiveness to flow. The shape of VWF is predicted to alter from irregularly coiled to extended thread-like in the transition from shear to elongational flow at sites of hemostasis and thrombosis. Elongational force propagated through the length of VWF in its thread-like shape exposes its monomers for multimeric binding to platelets and subendothelium and likely also increases affinity of the A1 domain for platelets. Specialized domains concatenate and compact VWF during biosynthesis. A2 domain unfolding by hydrodynamic force enables postsecretion regulation of VWF length. Mutations in VWF in von Willebrand disease contribute to and are illuminated by VWF biology. I attempt to integrate classic studies on the physiology of hemostatic plug formation into modern molecular understanding, and point out what remains to be learned. PMID:24928861

  8. Von Willebrand Factor permeates small vessels in CADASIL and inhibits smooth muscle gene expression

    PubMed Central

    Zhang, Xiaojie; Meng, He; Blaivas, Mila; Rushing, Elisabeth J.; Moore, Brian E.; Schwartz, Jessica; Lopes, M. Beatriz S.; Worrall, Bradford B.; Wang, Michael M.

    2011-01-01

    Background and Purpose CADASIL (cerebral autosomal dominant arteriopathy subcortical infarcts and leukoencephalopathy) is a genetic disorder hallmarked by ischemic stroke and vascular dementia. Characteristic pathological changes in the vasculature include thickening of small arteries and accumulation of heterogeneous material within the vessel wall. We tested whether endothelial von Willebrand factor (vWF) accumulates in CADASIL vessels and whether exposure of smooth muscle cells to vWF alters the expression of smooth muscle gene expression. Methods Brain sections obtained at autopsy from six North American CADASIL patients were examined using immunohistochemistry for vWF and IgG. Rat aortic smooth muscle cells (A7R5 cells) were tested for binding to infrared-tag labeled vWF. Finally, A7R5 cells were exposed to vWF, and expression of mature smooth muscle marker genes was analyzed by quantitative reverse transcriptase PCR. Results vWF is expressed in the penetrating arterial walls in all CADASIL samples. IgG, a marker of serum extravasation, was present only in a minority of arterial walls. vWF binds to smooth muscle cells in vitro, and low concentrations of vWF rapidly activate c-fos, EGR, TSP1, and c-myc while specifically inhibiting RNA encoding smooth muscle actin, calponin, and SM22. Conclusions These data demonstrate that vWF, likely produced by the endothelium, permeates the vessel wall of CADASIL brains. Exposure of smooth muscle cells to vWF results in reduction of specific RNAs required for normal vascular homeostasis. This is the first report of accumulation of a protein within CADASIL vessels that inhibits vascular gene expression and implicates a role for vWF beyond hemostasis. PMID:22639698

  9. Mutations in the D1 domain of von Willebrand factor impair their propeptide-dependent multimerization, intracellular trafficking and secretion.

    PubMed

    Yin, Jie; Ma, Zhenni; Su, Jian; Wang, Jiong-Wei; Zhao, Xiaojuan; Ling, Jing; Bai, Xia; Ouyang, Wanyan; Wang, Zhaoyue; Yu, Ziqiang; Ruan, Changgeng

    2015-01-01

    We identified three novel mutations (p.Gly39Arg, p.Lys157Glu, p.Cys379Gly) and one previously known mutation (p.Asp141Asn) in the von Willebrand factor propeptide from three von Willebrand disease patients. All four mutations impaired multimerization of von Willebrand factor, due to reduced oxidoreductase activity of isomeric propeptide. These mutations resulted in the endothelial reticulum retention and impaired basal and stimulated secretions of von Willebrand factor. Our results support that the mutations in the D1 domain lead to defective multimerization, intracellular trafficking, and secretion of von Willebrand factor and result in bleeding of patients. PMID:26088471

  10. Quantitative phase imaging of arthropods.

    PubMed

    Sridharan, Shamira; Katz, Aron; Soto-Adames, Felipe; Popescu, Gabriel

    2015-11-01

    Classification of arthropods is performed by characterization of fine features such as setae and cuticles. An unstained whole arthropod specimen mounted on a slide can be preserved for many decades, but is difficult to study since current methods require sample manipulation or tedious image processing. Spatial light interference microscopy (SLIM) is a quantitative phase imaging (QPI) technique that is an add-on module to a commercial phase contrast microscope. We use SLIM to image a whole organism springtail Ceratophysella denticulata mounted on a slide. This is the first time, to our knowledge, that an entire organism has been imaged using QPI. We also demonstrate the ability of SLIM to image fine structures in addition to providing quantitative data that cannot be obtained by traditional bright field microscopy. PMID:26334858

  11. Quantitative Relaxometry of the Brain

    PubMed Central

    Deoni, Sean C.L.

    2011-01-01

    The exquisite soft tissue contrast provided by magnetic resonance imaging arises principally from differences in the intrinsic relaxation properties, T1 and T2. Though the intricate relationships that link tissue microstructure and the longitudinal and transverse relaxation times remain to be firmly established, quantitative measurement of these parameters, also referred to as quantitative relaxometry, can be informative of disease-related tissue change, developmental plasticity, and other biological processes. Further, relaxometry studies potentially offer a more detailed characterization of tissue, compared with conventional qualitative or weighted imaging approaches. The purpose of this review is to briefly review the biophysical basis of relaxation, focusing specifically on the T1, T2 and T2* relaxation times, and to detail some of the more widely used and clinically feasible techniques for their in vivo measurement. We will focus on neuroimaging applications, though the methods described are equally well suited to cardiac, abdominal and musculoskeletal imaging. Potential sources of error, and methods for their correction, are also touched on. Finally, the combination of relaxation time data with other complementary quantitative imaging data, including diffusion tensor imaging, is discussed, with the aim of more thoroughly characterizing brain tissue. PMID:21613875

  12. Quantitative studies of immunofluorescent staining*

    PubMed Central

    Beutner, Ernst H.; Sepulveda, Marion R.; Barnett, Eugene V.

    1968-01-01

    Reproducible titres of indirect immunofluorescent (IF) staining with antinuclear factor (ANF)-containing sera could be obtained with different antihuman IgG conjugates by quantitative adjustments of their characteristics. Conversely, one ANF yielded a broad range of ANF titre (80-640) upon appropriate adjustments of the conjugate characteristics. The same and related characteristics of the conjugates also afforded a basis for quantitatively defining the conditions under which non-specific staining (NSS) appeared. The salient characteristics of the anti-IgG conjugates include: (1) their strength of antiglobulin (expressed as units/ml of precipitating antibody or ?g antibody N/ml); (2) their apparent fluorescein concentration (in ?g F/ml); (3) their protein concentration (in mg/ml). Optical and immunologic sensitivity ratios are calculated from these conjugate characteristics. Optical sensitivity (expressed as fluorescein concentration to protein concentration (F/P) ratios), immunological sensitivities (expressed as units/1% protein) and the dilution employed serve to characterize quantitatively anti-IgG conjugates adequately to define their specific and non-specific staining properties. PMID:4179321

  13. Analysis of the role of von Neumann's projection postulate in the canonical scheme of quantum teleportation and main quantum algorithms

    E-print Network

    Andrei Khrennikov

    2008-05-23

    Modern development of quantum technologies based on quantum information theory stimulated analysis of proposed computational, cryptographic and teleportational schemes from the viewpoint of quantum foundations. It is evident that not all mathematical calculations performed in complex Hilbert space can be directly realized in physical space. Recently by analyzing the original EPR paper we found that they argument was based on the misuse of the von Neumann's projection postulate. Opposite to von Neumann, Einstein, Podolsky and Rosen (EPR) applied this postulate to observables represented by operators with degenerate spectra. It was completely forbidden by von Neumann's axiomatics of QM. It is impossible to repeat the EPR considerations in the von Neumann's framework. In this note we analyze quantum teleportation by taking into account von Neumann's projection postulate. Our analysis shows that so called quantum teleportation is impossible in von Neumann's framework. On the other hand, our analysis implies that the main quantum algorithms are totally consistent with von Neumann's projection postulate.

  14. Stochastic resonance in a generalized Von Foerster population growth model

    SciTech Connect

    Lumi, N.; Mankin, R.

    2014-11-12

    The stochastic dynamics of a population growth model, similar to the Von Foerster model for human population, is studied. The influence of fluctuating environment on the carrying capacity is modeled as a multiplicative dichotomous noise. It is established that an interplay between nonlinearity and environmental fluctuations can cause single unidirectional discontinuous transitions of the mean population size versus the noise amplitude, i.e., an increase of noise amplitude can induce a jump from a state with a moderate number of individuals to that with a very large number, while by decreasing the noise amplitude an opposite transition cannot be effected. An analytical expression of the mean escape time for such transitions is found. Particularly, it is shown that the mean transition time exhibits a strong minimum at intermediate values of noise correlation time, i.e., the phenomenon of stochastic resonance occurs. Applications of the results in ecology are also discussed.

  15. A Powerful Friendship: Theodore von Karman and Hugh L. Dryden

    NASA Technical Reports Server (NTRS)

    Gorn, Michael

    2003-01-01

    During their long personal friendship and professional association, Theodore von Karman (1882-1963) and Hugh L. Dryden (1898-1965) exercised a pivotal if somewhat elusive influence over American aeronautics and spaceflight. Both decisive figures in organizing scientists and engineers at home and abroad, both men of undisputed eminence in their technical fields, their range of contacts in government, academia, the armed forces, industry, and professional societies spanned the globe to an extent unparalleled then as now. Moreover, because they coordinated their activities closely, their combined influence far exceeded the sum of each one s individual contributions. This paper illustrates their personal origins as well as the foundations of their friendship, how their relationship became a professional alliance, and their joint impact on the world of aeronautics and astronautics during the twentieth century.

  16. [Carl Friedrich von Weizsäcker and the Bethe-Weizsäcker cycle].

    PubMed

    Wiescher, Michael

    2014-01-01

    The Carbon- or Bethe-Weizsäcker Cycle plays an important role in astrophysics as one of the most important energy sources for a quiescent and explosive hydrogen burning in stars. This paper presents the historical background and the contributions by Carl Friedrich von Weizsäcker and Hans Bethe who provided the first predictions of the cycle. Furthermore, it discussed the experimental verification of the predicted process in the following decades. Also discussed is the extension of the initial Carbon cycle to the CNO multi-cycles and the hot CNO cycles which followed from the detailed experimental studies of the associated nuclear reactions. Finally discussed is the impact of the experimental and theoretical results on our present understanding of hydrogen burning in different stellar environments and on our understanding of the chemical evolution of our universe. PMID:24974598

  17. Franz von Leydig (1821-1908), pioneer of comparative histology.

    PubMed

    Schneider, Marlon R

    2012-05-01

    Franz von Leydig, a German histologist and zoologist, is known to every student of human or animal anatomy because of the testicular testosterone-producing cells carrying his name. However, he made many contributions to our knowledge of the fine structure of animal tissues, including more than 200 scientific articles and several books. His most important work, the book Lehrbuch der Histologie des Menschen und der Thiere, established him as a pioneer if not the founder of comparative histology. Leydig taught at three different universities (Würzburg, Tübingen and Bonn) and received many honours from scientific organizations worldwide, including the Royal Society. He died in Rothenburg ob der Tauber, the town of his birth, aged 86 years. PMID:22791874

  18. Beschiessung v. Reims durch die Armee des Generaloberst von Einem 

    E-print Network

    Burger, J. [illustrator

    2012-03-05

    TRANSCRIPTION; MESSAGE: M. Lieben. Teile Euch nur eben mit, dass ich von Fritz heute eine Karte erhalten habe. Geschrieben am 8. ds. Mts. und abgestempelt am 10. ds. Mts. Ist also nicht lange unterwegs gewesen. Es geht Ihm noch gut. Hat bis jetzt...TRANSLATION; MESSAGE: My dears, just letting you know that I got a post card from Fritz today. Written on the 8th of this month, postmarked on the 10th. So not long in coming. He's still doing well. Still didn't get any package from me. Too bad! Otherwise nothing of importance. Did mother send my black and white dress yet? I'm okay, and you too I hope? Sincere greetings from your Gertrud Written in a hurry!; SENT TO: To Mr. [A.?] Hornseck, Dortmund, Kö rnebackstr. 1, (care of Aug. Klö nne Company). Dolberg, 14 April 1916....

  19. Using genetic diagnostics in hemophilia and von Willebrand disease.

    PubMed

    Swystun, Laura L; James, Paula

    2015-12-01

    Most bleeding disorders encountered in clinical practice will be diagnosed, at least initially, by phenotypic assays. However, since the characterization of the genes that encode coagulation factors in the 1980s, significant progress has been made in translating this knowledge for diagnostic and therapeutic purposes. For hemophilia A and B, molecular genetic testing to determine carrier status, prenatal diagnosis, and likelihood of inhibitor development or anaphylaxis to infused coagulation factor concentrates is an established component of comprehensive clinical management. In contrast, although significant recent advances in our understanding of the molecular genetic basis of von Willebrand disease (VWD) have allowed for the development of rational approaches to genetic diagnostics, questions remain about this complex genetic disorder and how to incorporate emerging knowledge into diagnostic strategies. This article will review the state-of-the-art for molecular diagnostics for both hemophilia and VWD. PMID:26637715

  20. Dr. von Braun Standing by Five F-1 Engines

    NASA Technical Reports Server (NTRS)

    2004-01-01

    A pioneer of America's space program, Dr. von Braun stands by the five F-1 engines of the Saturn V launch vehicle. This Saturn V vehicle is an actual test vehicle which has been displayed at the U.S. Space Rocket Center in Huntsville, Alabama. Designed and developed by Rocketdyne under the direction of the Marshall Space Flight Center, a cluster of five F-1 engines was mounted on the Saturn V S-IC (first) stage. The engines measured 19-feet tall by 12.5-feet at the nozzle exit and burned 15 tons of liquid oxygen and kerosene each second to produce 7,500,000 pounds of thrust. The S-IC stage is the first stage, or booster, of a 364-foot long rocket that ultimately took astronauts to the Moon.

  1. Locality of the Thomas-Fermi-von Weizsäcker Equations

    E-print Network

    Faizan Q. Nazar; Christoph Ortner

    2015-09-22

    We establish a pointwise stability estimate for the Thomas-Fermi-von Weizs\\"acker (TFW) model, which demonstrates that a local perturbation of a nuclear arrangement results also in a local response in the electron density and electrostatic potential. The proof adapts the arguments for existence and uniqueness of solutions to the TFW equations in the thermodynamic limit by Catto et al. (1998). To demonstrate the utility of this combined locality and stability result we derive several consequences, including an exponential convergence rate for the thermodynamic limit, partition of total energy into exponentially localised site energies (and consequently, exponential locality of forces), and generalised and strengthened results on the charge neutrality of local defects.

  2. [Neurofibromatosis (von Recklinghausen disease) and carcinoid tumor in Vater's ampulla].

    PubMed

    Simon, L; Kiss, J; Kovács, H; Lukács, M; Nagy, P

    1995-10-15

    The localization of the carcinoid tumors of the gastrointestinal tract--as a part of the APUD system--is extremely seldom at the region of ampulla of Vater. A case of congenital neurofibromatosis is reported in a 49-year-old male patient, with a carcinoid tumor of the ampulla of Vater in the background of long-standing, atypical biliary complaints. Periampullary neoplasm of neural-crest origin are very rare, up to this time 73 cases of Vater papilla carcinoid tumors were described. Regarding the development of VP carcinoid in neurofibromatosis, our patient is the 21st reported case in the world literature, and the first one in Hungary. The authors review the literature, giving special attention to the risk of periampullary neoplasms in von Recklinghausen's disease, the need of accurate diagnosis and the correctly selected operative intervention. PMID:7478473

  3. SNAP23 Regulates Endothelial Exocytosis of von Willebrand Factor

    PubMed Central

    Zhu, Qiuyu; Yamakuchi, Munekazu; Lowenstein, Charles J.

    2015-01-01

    Endothelial exocytosis regulates vascular thrombosis and inflammation. The trafficking and release of endothelial vesicles is mediated by SNARE (Soluble NSF Attachment protein REceptors) molecules, but the exact identity of endothelial SNAREs has been unclear. Three SNARE molecules form a ternary complex, including isoforms of the syntaxin (STX), vesicle-associated membrane protein (VAMP), and synaptosomal-associated protein (SNAP) families. We now identify SNAP23 as the predominant endothelial SNAP isoform that mediates endothelial exocytosis of von Willebrand Factor (VWF). SNAP23 was localized to the plasma membrane. Knockdown of SNAP23 decreased endothelial exocytosis, suggesting it is important for endothelial exocytosis. SNAP23 interacted with the endothelial exocytic machinery, and formed complexes with other known endothelial SNARE molecules. Taken together, these data suggest that SNAP23 is a key component of the endothelial SNARE machinery that mediates endothelial exocytosis. PMID:26266817

  4. [Carl Friedrich von Weizsäcker's design of a unity of physics].

    PubMed

    Görnitz, Thomas

    2014-01-01

    As I learned in many conversations with Carl Friedrich von Weizsäcker, he saw his place in the history of science deriving from his "Theory of Urs". This theory will establish the unity of science on the basis of quantum bits. Any attempts to find some "fundamental bricks"--of whatever kind--must fail because of the antinomies of atomism. An abstract quantum bit is a structure quantum that cannot be conceived as a particle in space and time. However, it is clear, solely for logical reasons, that a quantum bit is an ultimate and indecomposable entity. Weizsäcker's revolutionary goal was--already 50 years ago--to unite quantum theory with cosmology and, on these grounds, proceed to a theory of elementary particles. The article gives a short overview of Weizsäcker's approach to the unity of physics, ending with a brief summary of what has been achieved in that endeavour up to now. PMID:24974600

  5. von Neumann entropy and on-site localization for perpetually coupled qubits

    E-print Network

    Kingshuk Majumdar

    2009-05-03

    We used the von Neumann entropy to study the single and many-particle on-site localizations of stationary states for an anisotropic Heisenberg spin-1/2 chain. With a constructed bounded sequence of on-site energies for single and many-particle systems we demonstrate that the von Neumann entropy approaches zero indicating strong on-site localizations for all states. On the contrary, random on-site energy sequence does not lead to strong on-site confinement of all states. Our numerical results indicate that the von Neumann entropy provides a new insight to analyze on-site localizations for these systems.

  6. von Zeipel surfaces and convective instability of accretion discs in modified gravity

    NASA Astrophysics Data System (ADS)

    Alipour, N.; Khesali, A. R.; Nozari, K.

    2015-12-01

    It is assumed that von Zeipel surfaces would play an important role in determining the structure and stability properties of equilibrium configuration of a barotropic fluid. The present study has investigated von Zeipel surfaces and instability of an accretion disc in modified gravity. The findings show that in the framework of modified gravity, the rate of mass accretion in an accretion disc is larger in the inner edge, middle region and the outer edge of the accretion disc much in the same way. However, in the scale of Solar system, von Zeipel surfaces with modified gravity are similar to the standard case.

  7. Gesellschaft, Lebensgemeinschaft, Ökosystem - Über die Kongruenz von politischen und ökologischen Theorien der Entwicklung

    NASA Astrophysics Data System (ADS)

    Voigt, Annette

    Im Jahr 1859 veröffentlichte Charles Darwin "On the Origin of Species“. Seine Evolutionstheorie ist das wohl spektakulärste Beispiel einer naturwissenschaftlichen Theorie großer gesellschaftlicher Relevanz. Ihre verschiedenen Facetten wurden in der Öffentlichkeit kontrovers diskutiert, unter anderem auch ihre Anwendung zur Erklärung von Zuständen und Prozessen menschlicher Gesellschaften. Zum Teil wurde die Seiensweise der Natur - scheinbar unabhängig von gesellschaftlichen Interessen - für die Erklärung und Legitimation gesellschaftlicher Zustände oder die Legitimation von politischen Ideologien herangezogen (Sozialdarwinismus). Denn Gesellschaft funktioniere ja so, wie Darwin die Natur erklärt habe: es herrsche z. B. Konkurrenzkampf, Auslese und Arbeitsteilung, Erfolg hätten diejenigen, die sich an die Bedingungen am Besten anpassten.

  8. [Ernst von der Porten : looking for facts before and after forced emigration].

    PubMed

    Goerig, M; Bruijn, L

    2014-10-01

    The Ernst von der Porten medal has been awarded for many years to exceptional personalities by the Alliance of German Anesthesiologists to honor the outstanding achievements of the physician Ernst von der Porten from Hamburg in the development of anesthesiology as an autonomous discipline Only recent access to hitherto inaccessible documents enabled the reconstruction of his final years. He was persecuted and excluded by the National Socialist (NS) regime due to his Jewish roots and finally forced to emigrate. Records revealed that even in the so-called safe exile, degrading treatment and humiliation continued for Ernst von der Porten and his family. He eventually evaded this situation by committing suicide. PMID:25185861

  9. On conjugate families and Jeffreys priors for von Mises–Fisher distributions

    PubMed Central

    Hornik, Kurt; Grün, Bettina

    2013-01-01

    This paper discusses characteristics of standard conjugate priors and their induced posteriors in Bayesian inference for von Mises–Fisher distributions, using either the canonical natural exponential family or the more commonly employed polar coordinate parameterizations. We analyze when standard conjugate priors as well as posteriors are proper, and investigate the Jeffreys prior for the von Mises–Fisher family. Finally, we characterize the proper distributions in the standard conjugate family of the (matrix-valued) von Mises–Fisher distributions on Stiefel manifolds. PMID:23805026

  10. [Scientific theoretical founding of medicine as a natural science by Hermann von Helmholtz (1821-1894)].

    PubMed

    Neumann, J N

    1994-01-01

    In this study an attempt will be made to discuss the epistemological problems in the theory and practice of modern technical medicine in the writings of Hermann von Helmholz. An inquiry into the relationship between von Helmholtz' thinking and the critical philosophy of Immanuel Kant is followed by the characteristics of von Helmholtz' philosophy of science which he himself called "empirical theory". The question of medicine as a science finally leads to the main problem of medical epistemology, viz., the relationship between theoretical knowledge and practice in medicine. In this context the anthropological dimension is brought into consideration. PMID:7843583

  11. Robuste Verzweigungserkennung von Gefäßen in CTA-Datensätzen zur modellbasierten Extraktion der Centerline

    NASA Astrophysics Data System (ADS)

    Beck, Thomas; Fritz, Dominik; Biermann, Christina; Dillmann, Rüdiger

    Bei der Befundung und Visualisierung von Blutgefäßen ist deren Centerline von zentraler Bedeutung. Die Unterscheidung zwischen unverzweigten Abschnitten des Gefäßes und Verzweigungsbereichen ermöglicht den Einsatz spezialisierter und sehr effizienter Algorithmen zur modellbasierten Extraktion der Centerline. In diesem Artikel wird ein robustes Verfahren zur Verzweigungserkennung vorgestellt. Das Verfahren beruht auf einem Front-Propagation-Ansatz mit dynamisch angepassten Schwellwerten und einer anschließenden Clusteranalyse. Die vorgestellte Methode zur Verzweigungserkennung wurde als Komponente einer Architektur zur Extraktion der Centerline auf handannotierten Datensätzen getestet. Erste Ergebnisse sind sehr vielversprechend und ermöglichen auch bei pathologischen Gefäßen eine robuste Detektion von Gefäßverzweigungen.

  12. [Reference relationships between human and animal in Hildegard von Bingen].

    PubMed

    Riethe, Peter

    2012-01-01

    In "De animalibus", the 7th book in the "Liber simplicis medicinae", Hildegard von Bingen describes the characteristics of four-footed land animals. Some of these have a special relationship with humans in that they embody moral qualities. An explanation for this is already given in the preface, which states that human intelligence recognizes these qualities, declaring that "You are this or that sort of creature". Since the relationship that animals have with nature shares a degree of similarity with that of man's, they can be regarded as symbolic representatives for particular human traits and characteristics. The article at hand presents Hildegard von Bingen's descriptions of the monkey, the lion, the bear, the rabbit, the dog, the cat, the wolf, the lynx, and the donkey. While the monkey just mimics man's behaviour and is imperfect in both settings, the lion embodies will power. The bear on the other hand stands for unbridled sexual desire, while in the rabbit the gentleness of a sheep is united with the bounce of a deer. The lynx is regarded as hedonistic, the donkey as stupid, and the wolf as surrounded by dangerous sylphs. In Hildegard's depictions, exotic and native animal species display rather extraordinary behavioural traits, and the medieval Christian world view of the author conveys unexpected relationships between humans and animals. In addition to empirical observation and experience, Hildegard also relies on folkloristic beliefs and magical practices related to explanatory models of her time. She allows largely unknown sources into her animal lore but never strays from her ultimate goal of having it serve to instruct people. In doing so, Hildegard removed herself far from the common tradition of medieval animal portraits. PMID:23155757

  13. John von Neumann and Klaus Fuchs: an Unlikely Collaboration

    NASA Astrophysics Data System (ADS)

    Bernstein, Jeremy

    2010-03-01

    I discuss the origin of the idea of making a fusion (hydrogen) bomb and the physics involved in it, and then turn to the design proposed for one by the unlikely collaborators John von Neumann and Klaus Fuchs in a patent application they filed at Los Alamos in May 1946, which Fuchs passed on to the Russians in March 1948, and which with substantial modifications was tested on the island of Eberiru on the Eniwetok atoll in the South Pacific on May 8, 1951. This test showed that the fusion of deuterium and tritium nuclei could be ignited, but that the ignition would not propagate because the heat produced was rapidly radiated away. Meanwhile, Stanislaw Ulam and C.J. Everett had shown that Edward Teller’s Classical Super could not work, and at the end of December 1950, Ulam had conceived the idea of super compression, using the energy of a fission bomb to compress the fusion fuel to such a high density that it would be opaque to the radiation produced. Once Teller understood this, he invented a greatly improved, new method of compression using radiation, which then became the heart of the Ulam-Teller bomb design, which was tested, also in the South Pacific, on November 1, 1952. The Russians have freely acknowledged that Fuchs gave them the fission bomb, but they have insisted that no one gave them the fusion bomb, which grew out of design involving a fission bomb surrounded by alternating layers of fusion and fission fuels, and which they tested on November 22, 1955. Part of the irony of this story is that neither the American nor the Russian hydrogen-bomb programs made any use of the brilliant design that von Neumann and Fuchs had conceived as early as 1946, which could have changed the entire course of development of both programs.

  14. Dynamics of Diffusion Flames in von Karman Swirling Flows Studied

    NASA Technical Reports Server (NTRS)

    Nayagam, Vedha; Williams, Forman A.

    2002-01-01

    Von Karman swirling flow is generated by the viscous pumping action of a solid disk spinning in a quiescent fluid media. When this spinning disk is ignited in an oxidizing environment, a flat diffusion flame is established adjacent to the disk, embedded in the boundary layer (see the preceding illustration). For this geometry, the conservation equations reduce to a system of ordinary differential equations, enabling researchers to carry out detailed theoretical models to study the effects of varying strain on the dynamics of diffusion flames. Experimentally, the spinning disk burner provides an ideal configuration to precisely control the strain rates over a wide range. Our original motivation at the NASA Glenn Research Center to study these flames arose from a need to understand the flammability characteristics of solid fuels in microgravity where slow, subbuoyant flows can exist, producing very small strain rates. In a recent work (ref. 1), we showed that the flammability boundaries are wider and the minimum oxygen index (below which flames cannot be sustained) is lower for the von Karman flow configuration in comparison to a stagnation-point flow. Adding a small forced convection to the swirling flow pushes the flame into regions of higher strain and, thereby, decreases the range of flammable strain rates. Experiments using downward facing, polymethylmethacrylate (PMMA) disks spinning in air revealed that, close to the extinction boundaries, the flat diffusion flame breaks up into rotating spiral flames (refs. 2 and 3). Remarkably, the dynamics of these spiral flame edges exhibit a number of similarities to spirals observed in biological systems, such as the electric pulses in cardiac muscles and the aggregation of slime-mold amoeba. The tail of the spiral rotates rigidly while the tip executes a compound, meandering motion sometimes observed in Belousov-Zhabotinskii reactions.

  15. Automated Quantitative Nuclear Cardiology Methods.

    PubMed

    Motwani, Manish; Berman, Daniel S; Germano, Guido; Slomka, Piotr

    2016-02-01

    Quantitative analysis of SPECT and PET has become a major part of nuclear cardiology practice. Current software tools can automatically segment the left ventricle, quantify function, establish myocardial perfusion maps, and estimate global and local measures of stress/rest perfusion, all with minimal user input. State-of-the-art automated techniques have been shown to offer high diagnostic accuracy for detecting coronary artery disease, as well as predict prognostic outcomes. This article briefly reviews these techniques, highlights several challenges, and discusses the latest developments. PMID:26590779

  16. A densitometer for quantitative autoradiography.

    PubMed

    Dauth, G W; Frey, K A; Gilman, S

    1983-11-01

    A low cost spot densitometer system is described. This system is useful for quantitative autoradiography of local cerebral glucose utilization, blood flow, receptor binding and other applications requiring densitometry on films. The densitometer can be used alone or interfaced to a microcomputer. The densitometer consists of a photographic enlarger, a digital multimeter, and the densitometer electronics. We have described how to construct, test and use the densitometer and how to interface the densitometer to a microcomputer. The advantages of this system are: (1) the ability to enlarge the image for accurate measurements from 'small' areas; (2) a completely unobscured image during measurement; (3) low cost and (4) ease of use. PMID:6319831

  17. Quantitative biology of single neurons

    PubMed Central

    Eberwine, James; Lovatt, Ditte; Buckley, Peter; Dueck, Hannah; Francis, Chantal; Kim, Tae Kyung; Lee, Jaehee; Lee, Miler; Miyashiro, Kevin; Morris, Jacqueline; Peritz, Tiina; Schochet, Terri; Spaethling, Jennifer; Sul, Jai-Yoon; Kim, Junhyong

    2012-01-01

    The building blocks of complex biological systems are single cells. Fundamental insights gained from single-cell analysis promise to provide the framework for understanding normal biological systems development as well as the limits on systems/cellular ability to respond to disease. The interplay of cells to create functional systems is not well understood. Until recently, the study of single cells has concentrated primarily on morphological and physiological characterization. With the application of new highly sensitive molecular and genomic technologies, the quantitative biochemistry of single cells is now accessible. PMID:22915636

  18. High speed quantitative digital microscopy

    NASA Technical Reports Server (NTRS)

    Castleman, K. R.; Price, K. H.; Eskenazi, R.; Ovadya, M. M.; Navon, M. A.

    1984-01-01

    Modern digital image processing hardware makes possible quantitative analysis of microscope images at high speed. This paper describes an application to automatic screening for cervical cancer. The system uses twelve MC6809 microprocessors arranged in a pipeline multiprocessor configuration. Each processor executes one part of the algorithm on each cell image as it passes through the pipeline. Each processor communicates with its upstream and downstream neighbors via shared two-port memory. Thus no time is devoted to input-output operations as such. This configuration is expected to be at least ten times faster than previous systems.

  19. Reglement ber die Unterzeichnung von nicht-finanzwirksamen Vertrgen an der Universitt Zrich

    E-print Network

    Zürich, Universität

    Seite 1 Reglement über die Unterzeichnung von nicht-finanzwirksamen Verträgen an der Universität Zürich (vom 23. Mai 2013) Die Universitätsleitung beschliesst: § l Geltungsbereich 1 Dieses Reglement regelt die Unterschriftskompetenz an der Universität Zürich bei Vertragsab- schlüssen ohne finanzielle

  20. Reglement ber die Gewhrung von Beitrgen durch die Studienbeitragskasse der Universitt Zrich

    E-print Network

    Zürich, Universität

    Reglement über die Gewährung von Beiträgen durch die Studienbeitragskasse der Universität Zürich § 1 Grundlagen Die Studienbeitragskasse unterstützt in- und ausländische Studierende der Universi- tät Zürich, die in finanzielle Notlage geraten sind, mit finanziellen Beiträgen. § 2 Grundsatz Das

  1. Motivation Optimierte radiale Basisfunktionen Wirkung Beispiel Fazit Analyse von GRACE-Beobachtungen durch

    E-print Network

    Stuttgart, Universität

    Motivation Optimierte radiale Basisfunktionen Wirkung Beispiel Fazit Analyse von GRACE.antoni@gis.uni-stuttgart.de Geodätisches Institut der Universität Stuttgart Karlsruhe, 22.09.2009 #12;Motivation Optimierte radiale Basisfunktionen Wirkung Beispiel Fazit Motivation Schwerefeldmodell = Kugelfunktionen + lokale Basisfunktionen

  2. Statement of Andrew von Eschenbach, M.D. - February 22, 2002

    Cancer.gov

    Statement of Andrew von Eschenbach, M.D. Director, National Cancer Institute National Institutes of Health U.S. Department of Health and Human Services Before the United States Senate Committee on Appropriations Subcommittee on Labor, Health and

  3. SUSCEPTIBILITY TO ATHEROSCLEROSIS IN AORTAS AND CORONARY ARTERIES OF SWINE WITH VON WILLEBRAND'S DISEASE

    EPA Science Inventory

    The development of coronary and aortic atherosclerosis was determined after balloon catheter injury of coronary arteries and administration of an atherogenic diet in normal pigs and pigs that were homozygous and heterozygous for von Willebrand's disease. Coronary atherosclerosis ...

  4. Einstellung und Wissen von Lehramtsstudierenden zur Evolution - ein Vergleich zwischen Deutschland und der Türkei

    NASA Astrophysics Data System (ADS)

    Graf, Dittmar; Soran, Haluk

    Es wird eine Untersuchung vorgestellt, in der Wissen und Überzeugungen von Lehramtsstudierenden aller Fächer zum Thema Evolution an zwei Universitäten in Deutschland und der Türkei erhoben worden sind. Die Befragung wurde in Dortmund und in Ankara durchgeführt. Es stellte sich heraus, dass ausgeprägte Defizite im Verständnis der Evolutionsmechanismen herrschen. Viele Studierende, insbesondere aus der Türkei, sind nicht von der Faktizität der Evolution überzeugt. Dies gilt sowohl für Studierende mit Fach Biologie als auch für Studierende mit anderen Fächern. Näher untersucht worden sind die Faktoren, die die Überzeugungen zur Evolution beeinflussen können, was ja in Anbetracht der hohen Ablehnungsrate der Evolution von besonderem Interesse ist. Das Vertrauen in die Wissenschaft spielt hierbei eine besondere Rolle: Wer der Wissenschaft vertraut, ist auch eher von der Evolution überzeugt, als diejenigen, die skeptisch gegenüber der Wissenschaft sind.

  5. Eine musikalische Raritt lsst der Chor der MHH unter der Leitung von Ute Schulze

    E-print Network

    Manstein, Dietmar J.

    zwei Violinen und Orchester in d-Moll von Johann Sebastian Bach. Als Gesangssolisten mit internationa hier zu sein und den Kindern eine kurze Freude zu bereiten", sagte er. Am 8. April 2008 kam als siebter

  6. Von Willlebrand Adhesion to Surfaces at High Shear Rates Is Controlled by Long-Lived Bonds

    E-print Network

    Sing, Charles E.

    Von Willebrand factor (vWF) adsorbs and immobilizes platelets at sites of injury under high-shear-rate conditions. It has been recently demonstrated that single vWF molecules only adsorb significantly to collagen above a ...

  7. von Neumann's Law: Theoretical and Microgravity Experimental Comparison for Coarsening Diffusion in Bubble Lattices

    NASA Technical Reports Server (NTRS)

    Noever, David A.

    2000-01-01

    The effects of gravity in influencing the theoretical limit for bubble lattice coarsening and aging behavior, otherwise called von Neumann's law, is examined theoretically and experimentally. Preliminary microgravity results will be discussed.

  8. Dr. Wernher Von Braun leads a tour of the S-IC checkout area.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Eberhard Rees, Charles Schultze, James Webb, Elmer Staats, Comptroller General of the United States, and Dr. Wernher Von Braun tour the S-IC checkout area in the Marshall Space Flight Center quality lab.

  9. Versuche zur Gewinnung von katalytischen Antikörpern zur Hydrolyse von Arylcarbamaten und Arylharnstoffen. (English Title: Attempts to produce catalytic antibodies for hydrolysis of arylcarbamates and arylureas)

    NASA Astrophysics Data System (ADS)

    Werner, Deljana

    2002-05-01

    Im Rahmen dieser Arbeit gelang es, katalytische Antikörper zur Hydrolyse von Benzylphenylcarbamaten sowie zahlreiche monoklonale Antikörper gegen Haptene herzustellen. Es wurden verschiedene Hapten-Protein-Konjugate unter Verwendung unterschiedlicher Kopplungsmethoden hergestellt und charakterisiert. Zur Generierung der hydrolytisch aktiven Antikörper wurden Inzuchtmäuse mit KLH-Konjugaten von 4 Übergangszustandsanaloga (ÜZA) immunisiert. Mit Hilfe der Hybridomtechnik wurden verschiedene monoklonale Antikörper gegen diese ÜZA gewonnen. Dabei wurden sowohl verschiedene Immunisierungsschemata als auch verschiedene Inzuchtmausstämme und Fusionstechniken verwendet. Insgesamt wurden 32 monoklonale Antikörper gegen die verwendeten ÜZA selektiert. Diese Antikörper wurden in groen Mengen hergestellt und gereinigt. Zum Nachweis der Antikörper-vermittelten Katalyse wurden verschiedene Methoden entwickelt und eingesetzt, darunter immunologische Nachweismethoden mit Anti-Substrat- und Anti-Produkt-Antikörpern und eine photometrische Methode mit Dimethylaminozimtaldehyd. Der Nachweis der hydrolytischen Aktivität gelang mit Hilfe eines Enzymsensors, basierend auf immobilisierter Tyrosinase. Die Antikörper N1-BC1-D11, N1-FA7-C4, N1-FA7-D12 und R3-LG2-F9 hydrolysierten die Benzylphenylcarbamate POCc18, POCc19 und Substanz 27. Der Nachweis der hydrolytischen Aktivität dieser Antikörper gelang auch mit Hilfe der HPLC. Der katalytische Antikörper N1-BC1-D11 wurde kinetisch und thermodynamisch untersucht. Es wurde eine Michaelis-Menten-Kinetik mit Km von 210 µM, vmax von 3 mM/min und kcat von 222 min-1 beobachtet. Diese Werte korrelieren mit den Werten der wenigen bekannten Diphenylcarbamat-spaltenden Abzyme. Die Beschleunigungsrate des Antikörpers N1-BC1-D11 betrug 10. Das ÜZA Hei3 hemmte die hydrolytische Aktivität. Dies beweist, dass die Hydrolyse in der Antigenbindungsstelle stattfindet. Weiter wurde zwischen der Antikörperkonzentration und der Umsatzgeschwindigkeit eine lineare Abhängigkeit festgestellt. Die thermodynamische Gleichtgewichtsdissoziationskonstante KD des Abzyms von 2,6 nM zeugt von einer sehr guten Affinität zum ÜZA. Hydrolytisch aktiv waren nur Antikörper, die gegen das Übergangszustandsanalogon Hei3 hergestellt worden waren. Es wird vermutet, dass die Hydrolyse der Benzylphenylcarbamate über einen Additions-Eliminierungsmechanismus unter Ausbildung eines tetraedrischen Übergangszustandes verläuft, dessen analoge Verbindung Hei3 ist. Im Rahmen der Generierung von Nachweisantikörpern zur Detektion der Substratabnahme bei der Hydrolyse wurden Anti-Diuron-Antikörper hergestellt. Einer der Antikörper (B91-CG5) ist spezifisch für das Herbizid Diuron und hat einen IC50-Wert von 0,19 µg/l und eine untere Nachweisgrenze von 0,04 µg/l. Ein anderer Antikörper (B91-KF5) reagiert kreuz mit einer Palette ähnlicher Herbizide. Mit diesen Antikörpern wurde ein empfindlicher Labortest, der ein Monitoring von Diuron auf Grundlage des durch die Trinkwasserverordnung festgeschriebenen Wertes für Pflanzenschutzmittel von 0,1 µg/l erlaubt, aufgebaut. Der Effekt der Anti-Diuron-Antikörper auf die Diuron-inhibierte Photosynthese wurde in vitro und in vivo untersucht. Es wurde nachgewiesen, dass sowohl in isolierten Thylakoiden, als auch in intakten Algen eine Vorinkubation der Anti-Diuron-Antikörper mit Diuron zur Inaktivierung seiner Photosynthese-hemmenden Wirkung führt. Wurde der Elektronentransport in den isolierten Thylakoiden oder in Algen durch Diuron unterbrochen, so führte die Zugabe der Anti-Diuron-Antikörper zur Reaktivierung der Elektronenübertragung. Attempts to produce catalytic antibodies for hydrolysis of arylcarbamates and arylureas: The aim of the investigations was to produce antibodies which are able to cleave herbicides resistant to naturally occuring enzymes. Structurally similar carbamate and urea derivatives were chosen for the experiments. Phosphonate derivatives were synthesized that mimick possible transition state analogues in structure and charge. Mice were immunized

  10. From Alexander von Humboldt to Frederic Edwin Church: Voyages of Scientific Exploration and Creativity

    E-print Network

    Baron, Frank

    2005-01-01

    From Alexander von Humboldt to Frederic Edwin Church: Voyages of Scientific Exploration and Creativity Sondernummer The Humboldt Digital Library „From Humboldt to F. E. Church“ (F. Baron) 1HiN VI, 10 (2005) Humboldt im Netz Herausgeber: Prof. Dr... .......................................................................................................13 „From Humboldt to F. E. Church“ (F. Baron) 2HiN VI, 10 (2005) Humboldt im Netz From Alexander von Humboldt to Frederic Edwin Church: Voyages of Scientific Exploration and Creativity Frank Baron Abstract Stephen Jay Gould wrote recently that „when...

  11. (Never) Mind your p's and q's: Von Neumann versus Jordan on the foundations of quantum theory

    NASA Astrophysics Data System (ADS)

    Duncan, A.; Janssen, M.

    2013-03-01

    In 1927, in two papers entitled "On a new foundation [Neue Begründung] of quantum mechanics," Pascual Jordan presented his version of what came to be known as the Dirac-Jordan statistical transformation theory. Jordan and Paul Dirac arrived at essentially the same theory independently of one another at around the same time. Later in 1927, partly in response to Jordan and Dirac and avoiding the mathematical difficulties facing their approach, John von Neumann developed the modern Hilbert space formalism of quantum mechanics. We focus on Jordan and von Neumann. Central to the formalisms of both are expressions for conditional probabilities of finding some value for one quantity given the value of another. Beyond that Jordan and von Neumann had very different views about the appropriate formulation of problems in quantum mechanics. For Jordan, unable to let go of the analogy to classical mechanics, the solution of such problems required the identification of sets of canonically conjugate variables, i.e., p's and q's. For von Neumann, not constrained by the analogy to classical mechanics, it required only the identification of a maximal set of commuting operators with simultaneous eigenstates. He had no need for p's and q's. Jordan and von Neumann also stated the characteristic new rules for probabilities in quantum mechanics somewhat differently. Jordan and Dirac were the first to state those rules in full generality. Von Neumann rephrased them and, in a paper published a few months later, sought to derive them from more basic considerations. In this paper we reconstruct the central arguments of these 1927 papers by Jordan and von Neumann and of a paper on Jordan's approach by Hilbert, von Neumann, and Nordheim. We highlight those elements in these papers that bring out the gradual loosening of the ties between the new quantum formalism and classical mechanics. This paper was written as part of a joint project in the history of quantum physics of the Max Planck Institut für Wissenschaftsgeschichte and the Fritz-Haber-Institut in Berlin.

  12. Markov property and strong additivity of von Neumann entropy for graded quantum systems

    NASA Astrophysics Data System (ADS)

    Moriya, Hajime

    2006-03-01

    The quantum Markov property is equivalent to the strong additivity of von Neumann entropy for graded quantum systems. The additivity of von Neumann entropy for bipartite graded systems implies the statistical independence of states. However, the structure of Markov states for graded systems is different from that for tensor-product systems which have trivial grading. For three-composed graded systems we have U(1)-gauge invariant Markov states whose restriction to the marginal pair of subsystems is nonseparable.

  13. Quantitative Characterization of Nanostructured Materials

    SciTech Connect

    Dr. Frank Bridges, University of California-Santa Cruz

    2010-08-05

    The two-and-a-half day symposium on the "Quantitative Characterization of Nanostructured Materials" will be the first comprehensive meeting on this topic held under the auspices of a major U.S. professional society. Spring MRS Meetings provide a natural venue for this symposium as they attract a broad audience of researchers that represents a cross-section of the state-of-the-art regarding synthesis, structure-property relations, and applications of nanostructured materials. Close interactions among the experts in local structure measurements and materials researchers will help both to identify measurement needs pertinent to â??real-worldâ? materials problems and to familiarize the materials research community with the state-of-the-art local structure measurement techniques. We have chosen invited speakers that reflect the multidisciplinary and international nature of this topic and the need to continually nurture productive interfaces among university, government and industrial laboratories. The intent of the symposium is to provide an interdisciplinary forum for discussion and exchange of ideas on the recent progress in quantitative characterization of structural order in nanomaterials using different experimental techniques and theory. The symposium is expected to facilitate discussions on optimal approaches for determining atomic structure at the nanoscale using combined inputs from multiple measurement techniques.

  14. Quantitative approaches to computational vaccinology.

    PubMed

    Doytchinova, Irini A; Flower, Darren R

    2002-06-01

    This article reviews the newly released JenPep database and two new powerful techniques for T-cell epitope prediction: (i) the additive method; and (ii) a 3D-Quantitative Structure Activity Relationships (3D-QSAR) method, based on Comparative Molecular Similarity Indices Analysis (CoMSIA). The JenPep database is a family of relational databases supporting the growing need of immunoinformaticians for quantitative data on peptide binding to major histocompatibility complexes and to the Transporters associated with Antigen Processing (TAP). It also contains an annotated list of T-cell epitopes. The database is available free via the Internet (http://www.jenner.ac.uk/JenPep). The additive prediction method is based on the assumption that the binding affinity of a peptide depends on the contributions from each amino acid as well as on the interactions between the adjacent and every second side-chain. In the 3D-QSAR approach, the influence of five physicochemical properties (steric bulk, electrostatic potential, local hydrophobicity, hydrogen-bond donor and hydrogen-bond acceptor abilities) on the affinity of peptides binding to MHC molecules were considered. Both methods were exemplified through their application to the well-studied problem of peptides binding to the human class I MHC molecule HLA-A*0201. PMID:12067414

  15. Clinical Utility of Quantitative Imaging

    PubMed Central

    Rosenkrantz, Andrew B; Mendiratta-Lala, Mishal; Bartholmai, Brian J.; Ganeshan, Dhakshinamoorthy; Abramson, Richard G.; Burton, Kirsteen R.; Yu, John-Paul J.; Scalzetti, Ernest M.; Yankeelov, Thomas E.; Subramaniam, Rathan M.; Lenchik, Leon

    2014-01-01

    Quantitative imaging (QI) is increasingly applied in modern radiology practice, assisting in the clinical assessment of many patients and providing a source of biomarkers for a spectrum of diseases. QI is commonly used to inform patient diagnosis or prognosis, determine the choice of therapy, or monitor therapy response. Because most radiologists will likely implement some QI tools to meet the patient care needs of their referring clinicians, it is important for all radiologists to become familiar with the strengths and limitations of QI. The Association of University Radiologists Radiology Research Alliance Quantitative Imaging Task Force has explored the clinical application of QI and summarizes its work in this review. We provide an overview of the clinical use of QI by discussing QI tools that are currently employed in clinical practice, clinical applications of these tools, approaches to reporting of QI, and challenges to implementing QI. It is hoped that these insights will help radiologists recognize the tangible benefits of QI to their patients, their referring clinicians, and their own radiology practice. PMID:25442800

  16. Quantitative measurements in capsule endoscopy.

    PubMed

    Keuchel, M; Kurniawan, N; Baltes, P; Bandorski, D; Koulaouzidis, A

    2015-10-01

    This review summarizes several approaches for quantitative measurement in capsule endoscopy. Video capsule endoscopy (VCE) typically provides wireless imaging of small bowel. Currently, a variety of quantitative measurements are implemented in commercially available hardware/software. The majority is proprietary and hence undisclosed algorithms. Measurement of amount of luminal contamination allows calculating scores from whole VCE studies. Other scores express the severity of small bowel lesions in Crohn?s disease or the degree of villous atrophy in celiac disease. Image processing with numerous algorithms of textural and color feature extraction is further in the research focuses for automated image analysis. These tools aim to select single images with relevant lesions as blood, ulcers, polyps and tumors or to omit images showing only luminal contamination. Analysis of motility pattern, size measurement and determination of capsule localization are additional topics. Non-visual wireless capsules transmitting data acquired with specific sensors from the gastrointestinal (GI) tract are available for clinical routine. This includes pH measurement in the esophagus for the diagnosis of acid gastro-esophageal reflux. A wireless motility capsule provides GI motility analysis on the basis of pH, pressure, and temperature measurement. Electromagnetically tracking of another motility capsule allows visualization of motility. However, measurement of substances by GI capsules is of great interest but still at an early stage of development. PMID:26299419

  17. Quantitative risk assessment system (QRAS)

    NASA Technical Reports Server (NTRS)

    Weinstock, Robert M (Inventor); Smidts, Carol S (Inventor); Mosleh, Ali (Inventor); Chang, Yung-Hsien (Inventor); Swaminathan, Sankaran (Inventor); Groen, Francisco J (Inventor); Tan, Zhibin (Inventor)

    2001-01-01

    A quantitative risk assessment system (QRAS) builds a risk model of a system for which risk of failure is being assessed, then analyzes the risk of the system corresponding to the risk model. The QRAS performs sensitivity analysis of the risk model by altering fundamental components and quantifications built into the risk model, then re-analyzes the risk of the system using the modifications. More particularly, the risk model is built by building a hierarchy, creating a mission timeline, quantifying failure modes, and building/editing event sequence diagrams. Multiplicities, dependencies, and redundancies of the system are included in the risk model. For analysis runs, a fixed baseline is first constructed and stored. This baseline contains the lowest level scenarios, preserved in event tree structure. The analysis runs, at any level of the hierarchy and below, access this baseline for risk quantitative computation as well as ranking of particular risks. A standalone Tool Box capability exists, allowing the user to store application programs within QRAS.

  18. Quantitative evaluation of Alzheimer's disease

    NASA Astrophysics Data System (ADS)

    Duchesne, S.; Frisoni, G. B.

    2009-02-01

    We propose a single, quantitative metric called the disease evaluation factor (DEF) and assess its efficiency at estimating disease burden in normal, control subjects (CTRL) and probable Alzheimer's disease (AD) patients. The study group consisted in 75 patients with a diagnosis of probable AD and 75 age-matched normal CTRL without neurological or neuropsychological deficit. We calculated a reference eigenspace of MRI appearance from reference data, in which our CTRL and probable AD subjects were projected. We then calculated the multi-dimensional hyperplane separating the CTRL and probable AD groups. The DEF was estimated via a multidimensional weighted distance of eigencoordinates for a given subject and the CTRL group mean, along salient principal components forming the separating hyperplane. We used quantile plots, Kolmogorov-Smirnov and ?2 tests to compare the DEF values and test that their distribution was normal. We used a linear discriminant test to separate CTRL from probable AD based on the DEF factor, and reached an accuracy of 87%. A quantitative biomarker in AD would act as an important surrogate marker of disease status and progression.

  19. Teaching quantitative biology: goals, assessments, and resources

    PubMed Central

    Aikens, Melissa L.; Dolan, Erin L.

    2014-01-01

    More than a decade has passed since the publication of BIO2010, calling for an increased emphasis on quantitative skills in the undergraduate biology curriculum. In that time, relatively few papers have been published that describe educational innovations in quantitative biology or provide evidence of their effects on students. Using a “backward design” framework, we lay out quantitative skill and attitude goals, assessment strategies, and teaching resources to help biologists teach more quantitatively. Collaborations between quantitative biologists and education researchers are necessary to develop a broader and more appropriate suite of assessment tools, and to provide much-needed evidence on how particular teaching strategies affect biology students' quantitative skill development and attitudes toward quantitative work. PMID:25368425

  20. Fibroblast growth factor-10 signals development of von Brunn's nests in the exstrophic bladder

    PubMed Central

    Eastman, Rocky; Leaf, Elizabeth M.; Zhang, Dianzhong; True, Lawrence D.; Sweet, Robert M.; Seidel, Kristy; Siebert, Joseph R.; Grady, Richard; Mitchell, Michael E.

    2010-01-01

    von Brunn's nests have long been recognized as precursors of benign lesions of the urinary bladder mucosa. We report here that von Brunn's nests are especially prevalent in the exstrophic bladder, a birth defect that predisposes the patient to formation of bladder cancer. Cells of von Brunn's nest were found to coalesce into a stratified, polarized epithelium which surrounds itself with a capsule-like structure rich in types I, III, and IV collagen. Histocytochemical analysis and keratin profiling demonstrated that nested cells exhibited a phenotype similar, but not identical, to that of urothelial cells of transitional epithelium. Immunostaining and in situ hybridization analysis of exstrophic tissue demonstrated that the FGF-10 receptor is synthesized and retained by cells of von Brunn's nest. In contrast, FGF-10 is synthesized and secreted by mesenchymal fibroblasts via a paracrine pathway that targets basal epithelial cells of von Brunn's nests. Small clusters of 10pRp cells, positive for both FGF-10 and its receptor, were observed both proximal to and inside blood vessels in the lamina propria. The collective evidence points to a mechanism where von Brunn's nests develop under the control of the FGF-10 signal transduction system and suggests that 10pRp cells may be the original source of nested cells. PMID:20719973

  1. Quantitative patterns in drone wars

    E-print Network

    Garcia-Bernado, J; Johnson, N F

    2014-01-01

    Attacks by drones (i.e., unmanned combat air vehicles) continue to generate heated political and ethical debates. Here we examine instead the quantitative nature of drone attacks, focusing on how their intensity and frequency compares to other forms of human conflict. In contrast to the power-law distribution found recently for insurgent and terrorist attacks, we find that the severity of attacks is well described by a lognormal distribution, indicating that the dynamics underlying drone attacks differ from these other forms of human conflict. Likewise, the pattern in the timing of attacks is consistent with one side having almost complete control. We show that these novel features can be reproduced and understood using a generative mathematical model in which resource allocation to the dominant side is regulated through a feedback loop.

  2. Quantitative evaluation of dermatological antiseptics.

    PubMed

    Leitch, C S; Leitch, A E; Tidman, M J

    2015-12-01

    Topical antiseptics are frequently used in dermatological management, yet evidence for the efficacy of traditional generic formulations is often largely anecdotal. We tested the in vitro bactericidal activity of four commonly used topical antiseptics against Staphylococcus aureus, using a modified version of the European Standard EN 1276, a quantitative suspension test for evaluation of the bactericidal activity of chemical disinfectants and antiseptics. To meet the standard for antiseptic effectiveness of EN 1276, at least a 5 log10 reduction in bacterial count within 5 minutes of exposure is required. While 1% benzalkonium chloride and 6% hydrogen peroxide both achieved a 5 log10 reduction in S. aureus count, neither 2% aqueous eosin nor 1 : 10 000 potassium permanganate showed significant bactericidal activity compared with control at exposure periods of up to 1 h. Aqueous eosin and potassium permanganate may have desirable astringent properties, but these results suggest they lack effective antiseptic activity, at least against S. aureus. PMID:26456933

  3. Quantitative microdialysis under transient conditions.

    PubMed

    Olson, R J; Justice, J B

    1993-04-15

    A microdialysis method is described which allows for the quantitative determination of extracellular analyte concentration under transient conditions. The method provides the extracellular concentration and the in vivo probe recovery as a function of time. The technique is based on the method for steady-state conditions but differs in the use of a between-group rather than a within-group design. Following cocaine and amphetamine administration, a significantly greater increase in extracellular DA was found than was estimated from the dialysate using conventional microdialysis methods. The discrepancy is due to microdialysis probe recovery decreasing concurrently with the increase observed in extracellular DA following cocaine and amphetamine injections. The method estimates the extracellular concentration independently of any changes in recovery. PMID:8494171

  4. Recent Developments in Quantitative Proteomics

    PubMed Central

    Becker, Christopher H.; Bern, Marshall

    2010-01-01

    Proteomics is the study of proteins on a large scale, encompassing the many interests scientists and physicians have in their expression and physical properties. Proteomics continues to be a rapidly expanding field, with a wealth of reports regularly appearing on technology enhancements and scientific studies using these new tools. This review focuses primarily on the quantitative aspect of protein expression and the associated computational machinery for making large-scale identifications of proteins and their post-translational modifications. The primary emphasis is on the combination of liquid chromatography-mass spectrometry (LC-MS) methods and associated tandem mass spectrometry (LC-MS/MS). Tandem mass spectrometry, or MS/MS, involves a second analysis within the instrument after a molecular dissociative event in order to obtain structural information including but not limited to sequence information. This review further focuses primarily on the study of in vitro digested proteins known as bottom-up or shotgun proteomics. A brief discussion of recent instrumental improvements precedes a discussion on affinity enrichment and depletion of proteins, followed by a review of the major approaches (label-free and isotope-labeling) to making protein expression measurements quantitative, especially in the context of profiling large numbers of proteins. Then a discussion follows on the various computational techniques used to identify peptides and proteins from LC-MS/MS data. This review article then includes a short discussion of LC-MS approaches to three-dimensional structure determination and concludes with a section on statistics and data mining for proteomics, including comments on properly powering clinical studies and avoiding over-fitting with large data sets. PMID:20620221

  5. [Heinrich von Kleist--crisis and creative overcoming].

    PubMed

    Schlimme, J

    2001-07-01

    Heinrich von Kleist's life was shaken repeatedly by negative life-events, finally he committed suicide in his last life-crisis (1811). His work was mostly understood as descriptions of negative life-events and failed-being. In this article it will be shown that in at least two "crises" Kleist's work can be understood as a creative overcome of those. Kleist shows in his "Essay to Find a Sure Way to Happiness" (1799) his way of solving his "Soldier-Crisis" (1798), a depressive episode. In "The Broken Jug" (1802 - 1805) he shows the implications of a philosophical problem experienced in his "Kant-Crisis" (1801) and offers chances to overcome this particular crisis, which still seems to be an actual problem of ourselves. Though his crises must be understood as depressive episodes, at least the "Kant-Crisis" with its connections to philosophical and artistical matters seems to be more complicated than a simple depressive syndrome. Kleist formulates his basic life-experience, to be repeatedly shaken by "crises" respectively depressive episodes and the necessity to overcome each in a new way of living. PMID:11479830

  6. [Carl Friedrich von Weizsäcker's language, rhetoric and habitus].

    PubMed

    Hentschel, Klaus

    2014-01-01

    Carl Friedrich von Weizsäcker was not only an exceptional physicist, philosopher and peace scholar, but also a skilled and articulate speaker and a highly successful author. Dozens of his books were published in tens of thousands of copies despite their highly nontrivial content. This wide impact was only possible--this at least is one of the claims made in this paper--because of his sophisticated style and rhetorics. The analysis here is based on hand-picked samples from all kinds of Weizsäcker texts (talks, scientific and popular papers and books, poems and Limericks). Strangely enough, this interesting stylistic and rhetorical facet of his oeuvre has hitherto not been analyzed in any detail despite its crucial importance in the broad impact on his multifarious audience. My paper starts out from a collection of striking features of his language and structural specialties in his published talks and speeches, and explore findings from sound recordings and film tapes which offer further insight into his manner of emphasis, usage of pauses and intonation. On the basis of these stylistic traits and their often subcutaneous, but nevertheless clever rhetorics, I close with a few remarks on the habitus of this scholar and his positioning within the ensemble of German-speaking physicists of that generation. PMID:24974596

  7. Memory recall in arousing situations – an emotional von Restorff effect?

    PubMed Central

    Wiswede, Daniel; Rüsseler, Jascha; Hasselbach, Simone; Münte, Thomas F

    2006-01-01

    Background Previous research has demonstrated a relationship between memory recall and P300 amplitude in list learning tasks, but the variables mediating this P300-recall relationship are not well understood. In the present study, subjects were required to recall items from lists consisting of 12 words, which were presented in front of pictures taken from the IAPS collection. One word per list is made distinct either by font color or by a highly arousing background IAPS picture. This isolation procedure was first used by von Restorff. Brain potentials were recorded during list presentation. Results Recall performance was enhanced for color but not for emotional isolates. Event-related brain potentials (ERP) showed a more positive P300-component for recalled non-isolated words and color-isolated words, compared to the respective non-remembered words, but not for words isolated by arousing background. Conclusion Our findings indicate that it is crucial to take emotional mediator variables into account, when using the P300 to predict later recall. Highly arousing environments might force the cognitive system to interrupt rehearsal processes in working memory, which might benefit transfer into other, more stable memory systems. The impact of attention-capturing properties of arousing background stimuli is also discussed. PMID:16863589

  8. Minimal Coupling in Koopman-von Neumann Theory

    E-print Network

    E. Gozzi; D. Mauro

    2001-11-14

    Classical mechanics (CM), like quantum mechanics (QM), can have an operatorial formulation. This was pioneered by Koopman and von Neumann (KvN) in the 30's. They basically formalized, via the introduction of a classical Hilbert space, earlier work of Liouville who had shown that the classical time evolution can take place via an operator, nowadays known as the Liouville operator. In this paper we study how to perform the coupling of a point particle to a gauge field in the KvN version of CM. So we basically implement at the classical operatorial level the analog of the minimal coupling of QM. We show that, differently than in QM, not only the momenta but also other variables have to be coupled to the gauge field. We also analyze in details how the gauge invariance manifests itself in the Hilbert space of KvN and indicate the differences with QM. As an application of the KvN method we study the Landau problem proving that there are many more degeneracies at the classical operatorial level than at the quantum one. As a second example we go through the Aharonov-Bohm phenomenon showing that, at the quantum level, this phenomenon manifests its effects on the spectrum of the quantum Hamiltonian while at the classical level there is no effect whatsoever on the spectrum of the Liouville operator.

  9. Minimal Coupling in Koopman-von Neumann Theory

    NASA Astrophysics Data System (ADS)

    Gozzi, E.; Mauro, D.

    2002-03-01

    Classical mechanics (CM), like quantum mechanics (QM), can have an operatorial formulation. This was pioneered by Koopman and von Neumann (KvN) in the 1930s. They basically formalized, via the introduction of a classical Hilbert space, earlier work of Liouville who had shown that the classical time evolution can take place via an operator, nowadays known as the Liouville operator. In this paper we study how to perform the coupling of a point particle to a gauge field in the KvN version of CM. So we basically implement at the classical operatorial level the analog of the minimal coupling of QM. We show that, differently than in QM, not only the momenta but also other variables have to be coupled to the gauge field. We also analyze in detail how the gauge invariance manifests itself in the Hilbert space of KvN and indicate the differences with QM. As an application of the KvN method we study the Landau problem proving that there are many more degeneracies at the classical operatorial level than at the quantum one. As a second example we go through the Aharonov-Bohm phenomenon showing that, at the quantum level, this phenomenon manifests its effects on the spectrum of the quantum Hamiltonian while at the classical level there is no effect whatsoever on the spectrum of the Liouville operator.

  10. Von Mises stress for two-dimensional elasticity problems

    SciTech Connect

    Boumedine, H.; Grilhe, J.; Coujou, A.

    1996-02-01

    The internal stresses arising from the misfit between the {gamma} and {gamma}{prime} phases of singlecrystal superalloy have a great influence on the mechanical properties of such materials at high temperatures. Several authors have determined these stresses by finite element calculations. These authors used a two dimension model (2D) to describe the approximately cubic shape of the {gamma}{prime} precipitates. Two questions arise from the use of 2D models for 3D structures. The first concerns the uncertainty of such models and this has been evaluated by Muller in a recent paper. The second involves the Von Mises (VM) stress. The authors use this stress as defined for 3D to describe the state of stress that can bring about plastic 2D strain. This stress is directly related to the distortion energy and is appropriate for single crystal material undergoing plastic deformation through dislocation gliding; however careful consideration is required for 2D analyses. In this paper, a VM stress in 2D is defined having the same physical significance as for 3D. Then, the difference is evaluated between these two stresses (VM for 2D and VM for 3D) for the case of a spherical precipitate.

  11. Dizziness and renal failure revealing the Von Hippel Lindau disease.

    PubMed

    Sekkouri, Kawtar Alaoui; Alaoui, S Rachidi; Batta, F; Belghiti, K Alaoui; Alaoui, H; El Fadil, C; Husseini, T Sqalli

    2015-01-01

    The germinal mutation of the Von Hippel Lindeau (VHL) tumor suppressor gene predisposes to the development of benign or malignant richly vascularized tumors. VHL disease is an autosomal-dominant disorder with complete penetrance at the age of 60 years. Screening for people at risk is strongly recommended, and careful monitoring allows treatment of the tumor lesions as early as possible. A 42-year-old man sought medical consult for hematuria, disabling dizziness and balance disorders lasting for two months. The neurological examination revealed the presence of a kinetic cerebellar syndrome. The cerebro-spinal magnetic resonance imaging revealed multiple hemangioblastomas, both encephalic and medullar. Abdominal computed tomography revealed a big solid mass in the left kidney and multiple intra-parenchymal cystic lesions in the right kidney and the pancreas. The diagnosis of VHL disease was strongly suspected. The operative indication of brain damage and renal mass have been submitted. The pathological study of the renal surgical specimen revealed a clear cell carcinoma. The post-operative course was uneventful and all the symptoms have disappeared. Genetic study and close follow-up are recommended for this disease. PMID:26586070

  12. [Carl Friedrich von Weizsäcker and the interpretations of quantum theory].

    PubMed

    Stöckler, Manfred

    2014-01-01

    What are 'interpretations' of quantum theory? What are the differences between Carl Friedrich von Weizsäkcker's approach and contemporary views? The various interpretations of quantum mechanics give diverse answers to questions concerning the relation between measuring process and standard time development, the embedding of quantum objects in space ('wave-particle-dualism'), and the reference of state vectors. Does the wave function describe states in the real world or does it refer to our knowledge about nature? First, some relevant conceptions in Weizsäcker's book The Structure of Physics (Der Aufbau der Physik, 1985) are introduced. In a second step I point out why his approach is not any longer present in contemporary debates. One reason is that Weizsäcker is mainly affected by classical philosophy (Platon, Aristoteles, Kant). He could not esteem the philosophy of science that was developed in the spirit of logical empiricism. So he lost interest in disputes with Anglo-Saxon philosophy of quantum mechanics. Especially his interpretation of probability and his analysis of the collapse of the state function as change in knowledge differ from contemporary standard views. In recent years, however, epistemic interpretations of quantum mechanics are proposed that share some of Weizsäcker's intuitions. PMID:24974602

  13. Empathy and identification in Von Donnersmarck's The Lives of Others.

    PubMed

    Diamond, Diana

    2008-09-01

    Florian Henckel von Donnersmarck's The Lives of Others, set in the German Democratic Republic in 1984, five years before the fall of the Berlin Wall, has been called the first accurate depiction of the psychological terror wielded by the Stasi, the East German secret police, who safeguarded the dictatorship of the proletariat. The film is about the psychological and political transformation of a Stasi officer, Wiesler, who undertakes the surveillance of a prominent playwright and his actress lover. The mechanisms through which Wiesler comes to empathize and identify with the subjects of his investigation, as he observes and listens in on the rich blend of passion, poetry, and politics that characterizes their lives, are explored in depth. Wiesler's transformation is based in part on the capacity to form implicit models of the behavior and experiences of others, based on the mirror neuron system, that Gallese and his colleagues call "embodied simulation." Underpinning the processes of empathy and identification so central to this film, embodied simulation is an unconscious and prereflexive mechanism through which the actions, emotions, and sensations we observe activate internal representations of the bodily and mental states of the other. Embodied simulation also expands our understanding of the power of the primal scene, which has long been identified as a major organizer of unconscious fantasies and conflicts throughout life, and which forms the central metaphor of the film. Embodied simulation scaffolds our aesthetic response to art, music, and literature, underlies the dynamics of spectatorship, and potentially catalyzes resistance to totalitarian mass movements. PMID:18802131

  14. From Quantum Fields to Local Von Neumann Algebras

    NASA Astrophysics Data System (ADS)

    Borchers, H. J.; Yngvason, Jakob

    The subject of the paper is an old problem of the general theory of quantized fields: When can the unbounded operators of a Wightman field theory be associated with local algebras of bounded operators in the sense of Haag? The paper reviews and extends previous work on this question, stressing its connections with a noncommutive generalization of the classical Hamburger moment problem. Necessary and sufficient conditions for the existence of a local net of von Neumann algebras corresponding to a given Wightman field are formulated in terms of strengthened versions of the usual positivity property of Wightman functionals. The possibility that the local net has to be defined in an enlarged Hilbert space cannot be ruled out in general. Under additional hypotheses, e.g., if the field operators obey certain energy bounds, such an extension of the Hilbert space is not necessary, however. In these cases a fairly simple condition for the existence of a local net can be given involving the concept of “central positivity” introduced by Powers. The analysis presented here applies to translationally covariant fields with an arbitrary number of components, whereas Lorentz covariance is not needed. The paper contains also a brief discussion of an approach to noncommutative moment problems due to Dubois-Violette, and concludes with some remarks on modular theory for algebras of unbounded operators.

  15. Secreting von Willebrand factor in a G?-SNAP.

    PubMed

    Isakson, Brant E

    2014-01-16

    In this issue of Blood, Rusu et al use a state-of-the-art combination of pharmacological, genetic, and molecular techniques to dissect a mechanism for von Willebrand factor (vWF) secretion from endothelial cells mediated via Gaq/11 and Ga12 that can be triggered in basal or stimulated conditions. Indeed, although the storage of vWF in Weibel-Palade bodies (WPBs) of endothelial cells has been known for decades, the molecular mechanisms governing WPB docking with plasma membrane and vWF secretion remains undefined. One of the reasons this is still a very active area of investigation is that understanding the mechanism behind WPB docking is crucial for understanding potential pharmacological targets for pathological conditions associated with platelet aggregation/thrombi (e.g., stroke), where vWF levels directly correlate with severity of disease progress. The work by Rusu et al opens up a new area of investigation into G-protein-coupled receptors as triggers for WPB fusion at the plasma membrane and for vWF secretion. PMID:24434997

  16. Basal secretion of von Willebrand factor from human endothelial cells.

    PubMed

    Giblin, Jonathan P; Hewlett, Lindsay J; Hannah, Matthew J

    2008-08-15

    Endothelial cells store the adhesive glycoprotein von Willebrand factor (VWF) in Weibel-Palade bodies (WPBs), distinctively shaped regulated secretory organelles that undergo exocytosis in response to secretagogue. A significant proportion of newly synthesized VWF is also secreted spontaneously from nonstimulated cells, through what is thought to be the constitutive secretory pathway. To learn more about VWF trafficking, we performed kinetic analyses of the storage and nonstimulated secretion of VWF in cultured human endothelial cells. We found that most VWF was secreted through a route that was significantly delayed compared with constitutive secretion, although this pathway was responsible for secretion of a small amount of uncleaved VWF precursor. Disruption of pH-dependent sorting processes with ammonium chloride converted the secretion kinetics of mature VWF to that of its precursor. Conversely, preventing constitutive secretion of nascent protein with brefeldin A had only a modest effect on the spontaneous release of VWF, showing that most VWF secreted by nonstimulated cells was not constitutive secretion but basal release of a post-Golgi storage organelle, presumably the WPB. These data suggest that VWF is sorted to the regulated secretory pathway in endothelial cells much more efficiently than previously reported. PMID:18344423

  17. Allosteric activation of ADAMTS13 by von Willebrand factor.

    PubMed

    Muia, Joshua; Zhu, Jian; Gupta, Garima; Haberichter, Sandra L; Friedman, Kenneth D; Feys, Hendrik B; Deforche, Louis; Vanhoorelbeke, Karen; Westfield, Lisa A; Roth, Robyn; Tolia, Niraj Harish; Heuser, John E; Sadler, J Evan

    2014-12-30

    The metalloprotease ADAMTS13 cleaves von Willebrand factor (VWF) within endovascular platelet aggregates, and ADAMTS13 deficiency causes fatal microvascular thrombosis. The proximal metalloprotease (M), disintegrin-like (D), thrombospondin-1 (T), Cys-rich (C), and spacer (S) domains of ADAMTS13 recognize a cryptic site in VWF that is exposed by tensile force. Another seven T and two complement C1r/C1s, sea urchin epidermal growth factor, and bone morphogenetic protein (CUB) domains of uncertain function are C-terminal to the MDTCS domains. We find that the distal T8-CUB2 domains markedly inhibit substrate cleavage, and binding of VWF or monoclonal antibodies to distal ADAMTS13 domains relieves this autoinhibition. Small angle X-ray scattering data indicate that distal T-CUB domains interact with proximal MDTCS domains. Thus, ADAMTS13 is regulated by substrate-induced allosteric activation, which may optimize VWF cleavage under fluid shear stress in vivo. Distal domains of other ADAMTS proteases may have similar allosteric properties. PMID:25512528

  18. A Sheaf of von Neumann Algebras and Its Geometry

    E-print Network

    Micha? Eckstein; Michael Heller; Leszek Pysiak; Wies?aw Sasin

    2013-01-05

    It is shown that the differential geometry of space-time, can be expressed in terms of the algebra of operators on a bundle of Hilbert spaces. The price for this is that the algebra of smooth functions on space-time has to be made noncommutative. The generalized differential geometry of space-time is constructed in terms of the algebra A (and its derivations) on a transformation groupoid. Regular representation {\\pi} of A in the algebra of bounded operators on a bundle of Hilbert spaces leads to the algebra \\pi(A) = M_0 which can be completed to the von Neumann algebra M . The representation \\pi establishes the isomorphism between A and M_0 which, in turn, implies the isomorphism between moduli of their derivations. In this way, geometry naturally transfers to the algebra M_0 and its derivations. Although geometry, as defined in terms of M_0, is formally isomorphic to that defined in terms of A, it exhibits a strong probabilistic flavour. However, the geometry of M_0 does not prolong to M . This is clearly a serious stumbling block to fully unify mathematical tools of general relativity and quantum theory.

  19. Emperor Ashoka: Did he suffer from von Recklinghausen's diseases?

    PubMed Central

    Wig, N. N.; Sharma, Sheetal

    2015-01-01

    Emperor Ashoka is widely regarded as one of the greatest rulers of India. This paper mainly deals with his medical condition as recorded in the Buddhist texts of Sri Lanka as well as in the Buddhist texts of North India and Nepal. These sources mention his skin disorder which is described as very rough and unpleasant to touch. He is also known to have episodes of loss of consciousness at various times in his life. One of the earliest representations of Ashoka, about 100 years after his death at one of the gates of Sanchi Stupa, shows Ashoka fainting when visiting the Bodhi tree and being held by his queens. In this sculpture, Emperor Ashoka is shown as a man of short height, large head and a paunchy abdomen. In this paper, it is speculated that Emperor Ashoka was probably suffering from von Recklinghausen disease (Neurofibromatosis Type 1), which could explain his skin condition, episodes of loss of consciousness (probably epilepsy) and other bodily deformities. PMID:25657467

  20. Ludwig von Bertalanffy's Organismic View on the Theory of Evolution

    PubMed Central

    Drack, Manfred

    2015-01-01

    Ludwig von Bertalanffy was a key figure in the advancement of theoretical biology. His early considerations already led him to recognize the necessity of considering the organism as a system, as an organization of parts and processes. He termed the resulting research program organismic biology, which he extended to all basic questions of biology and almost all areas of biology, hence also to the theory of evolution. This article begins by outlining the rather unknown (because often written in German) research of Bertalanffy in the field of theoretical biology. The basics of the organismic approach are then described. This is followed by Bertalanffy's considerations on the theory of evolution, in which he used methods from theoretical biology and then introduced his own, organismic, view on evolution, leading to the demand for finding laws of evolution. Finally, his view on the concept of homology is presented. J. Exp. Zool. (Mol. Dev. Evol.) 324B: 77–90, 2015. © 2015 The Authors. Journal of Experimental Zoology Part B: Molecular and Developmental Evolution published by Wiley Periodicals, Inc. PMID:25727202

  1. War as Aesthetic: The Philosophy of Carl von Clausewitz as the Embodiment of John Dewey's Concept of Experience 

    E-print Network

    De Berg, Oak Herbert

    2011-10-21

    ,?applying?the?Deweyan?overlay?to?von?Clausewitz?s?philosophy,?this? discourse?addresses?the?question?whether?von?Clausewitz?s?philosophical?view? of?leadership?continues?to?be?pertinent?in?today?s?world,?especially?as?applied?to? contemporary?warfare.?A?current?synthesis?of?the?ideas?of?the?two?philosophers? establishes...? significant? incorporations? of? the? concepts? of? Dewey? and? von? Clausewitz,? the? link? from? Boyd?s?philosophy?to?a?practical?and?applied?use?in?the?arena?of?actual?modern? warfare...

  2. Ubungsaufgaben Blatt 10 zum 21.06.13 Aufgabe 1 (das ist die verlangerte A2 von Blatt 08)

    E-print Network

    Wünsche, Hans-Jürgen "Ede"

    ¨Ubungsaufgaben Blatt 10 zum 21.06.13 Aufgabe 1 (das ist die verl¨angerte A2 von Blatt 08) Der Koordinaten und bei b) die Ergebnisse von a). Aufgabe 2 Ein Operator ^ J mit den Komponenten ^Jx, ^Jy und ^Jz erf¨ulle [ ^Jx, ^Jy] = i ^Jz und [ ^Jx, ^ J 2 ] = 0, sowie alle zyklischen Vertauschungen von x, y, z

  3. Answering Critical Questions Using Quantitative Data

    ERIC Educational Resources Information Center

    Stage, Frances K.

    2007-01-01

    Drawing on the work of several prominent scholars, the author describes the evolution of quantitative critical inquiry and compares this perspective to traditional research paradigms. (Contains 1 table.)

  4. Quantitative Bioscience for tiie 21st Century

    E-print Network

    mathematical and quantitative approaches are essential for making advances in scientists' understanding, it is imperative that scientists develop new meth- ods, both statistical and mathematical, for understanding how

  5. Towards accurate imputation of quantitative genetic interactions

    E-print Network

    Krogan, Nevan J.

    Recent technological breakthroughs have enabled high-throughput quantitative measurements of hundreds of thousands of genetic interactions among hundreds of genes in Saccharomyces cerevisiae. However, these assays often ...

  6. A monomeric von Willebrand factor fragment, Leu-504--Lys-728, inhibits von Willebrand factor interaction with glycoprotein Ib-IX [corrected

    PubMed Central

    Gralnick, H R; Williams, S; McKeown, L; Kramer, W; Krutzsch, H; Gorecki, M; Pinet, A; Garfinkel, L I

    1992-01-01

    von Willebrand factor interaction with glycoprotein Ib alpha (GPIb alpha) plays a critical role in the initial phase of platelet adhesion at high shear rates, and it may also play a role in platelet thrombus formation in partially occluded arteries. Previous studies have indicated that two peptides, Cys-474--Pro-488 (peptide 153) and Ser-692--Pro-708 (peptide 154), inhibit von Willebrand factor--GPIb alpha interaction. We have expressed a recombinant fragment of von Willebrand factor, Leu-504--Lys-728 [corrected], with a single intrachain disulfide bond linking residues Cys-509--Cys-695 and examined its ability to inhibit von Willebrand factor--GPIb alpha interactions and platelet adhesion at high shear forces. This recombinant fragment, named VCL, inhibits ristocetin-induced, botrocetin-induced, and asialo-von Willebrand factor-induced platelet aggregation and binding to platelets at an IC50 = 0.011-0.260 microM, significantly lower than the IC50 of peptide 153 or 154, IC50 = 86-700 microM. Peptides 153 and 154 did not result in any inhibition of platelet adhesion (IC50 greater than 500 microM). In contrast, VCL inhibited 50% of platelet adhesion at 0.94 microM and at 7.6 microM inhibited greater than 80% of platelet adhesion to human umbilical artery subendothelium at high shear forces. VCL inhibited the contact and spreading of platelets and also caused a marked decrease in thrombus formation. These studies indicate that VCL may be an effective antithrombotic agent in preventing arterial thrombus formation in areas of high shear force. PMID:1518808

  7. Quantitative imaging as cancer biomarker

    NASA Astrophysics Data System (ADS)

    Mankoff, David A.

    2015-03-01

    The ability to assay tumor biologic features and the impact of drugs on tumor biology is fundamental to drug development. Advances in our ability to measure genomics, gene expression, protein expression, and cellular biology have led to a host of new targets for anticancer drug therapy. In translating new drugs into clinical trials and clinical practice, these same assays serve to identify patients most likely to benefit from specific anticancer treatments. As cancer therapy becomes more individualized and targeted, there is an increasing need to characterize tumors and identify therapeutic targets to select therapy most likely to be successful in treating the individual patient's cancer. Thus far assays to identify cancer therapeutic targets or anticancer drug pharmacodynamics have been based upon in vitro assay of tissue or blood samples. Advances in molecular imaging, particularly PET, have led to the ability to perform quantitative non-invasive molecular assays. Imaging has traditionally relied on structural and anatomic features to detect cancer and determine its extent. More recently, imaging has expanded to include the ability to image regional biochemistry and molecular biology, often termed molecular imaging. Molecular imaging can be considered an in vivo assay technique, capable of measuring regional tumor biology without perturbing it. This makes molecular imaging a unique tool for cancer drug development, complementary to traditional assay methods, and a potentially powerful method for guiding targeted therapy in clinical trials and clinical practice. The ability to quantify, in absolute measures, regional in vivo biologic parameters strongly supports the use of molecular imaging as a tool to guide therapy. This review summarizes current and future applications of quantitative molecular imaging as a biomarker for cancer therapy, including the use of imaging to (1) identify patients whose tumors express a specific therapeutic target; (2) determine whether the drug reaches the target; (3) identify an early response to treatment; and (4) predict the impact of therapy on long-term outcomes such as survival. The manuscript reviews basic concepts important in the application of molecular imaging to cancer drug therapy, in general, and will discuss specific examples of studies in humans, and highlight future directions, including ongoing multi-center clinical trials using molecular imaging as a cancer biomarker.

  8. BOOK REVIEW: Meilensteine der Astronomie - Von Aristoteles bis Hawking

    NASA Astrophysics Data System (ADS)

    Duerbeck, H. W.; Hamel, J.

    2006-12-01

    A writer, more specific a writer on the history of astronomy, might from time to time look at the collected document folders with all the research material and reprints, and might wonder: has this been all? Especially at a time when recycling is in vogue? And, perhaps with a request or an invitation to submit something, he or she might consider re-using the material before its definitive disposal. Well, such are my feelings when I looked at Jurgen Hamel's new book Milestones of Astronomy - From Aristoteles to Hawking . A slight chance for survival of medium-sized publishers like Kosmos is to offer popular books, and a title must attract potential buyers: Aristoteles means the "old" times, and as concerns the "mad scientist" of modern times, Stephen Hawking has by now dethroned Einstein. In 1998, Hamel had published a Geschichte der Astronomie - Von den Anfangen bis zur Gegenwart (History of astronomy, from the beginnings to the present), which, of course, he could not simply copy. This time, he selected some stones from his research areas - milestones, touchstones, stumbling blocks in the long road of astronomical evolution - and put them between the covers of his new book. So let us look at these (mile)stones . The reader is informed about Aristoteles on 2 pages, but his medieval interpreter Johannes de Sacrobosco gets 8 pages! Copernicus' life and achievements are described on 9 pages, closely followed by his devotee and translator Rothmann with 8 pages; Copernicus' contemporary, Peter Apian, however, gets about 13! Bessel's and Herschel's lifes and works are described on well-deserved 13 and 15 pages, while the achievements of the two Lucasian professors, Isaac Newton and Stephen Hawking, are just outlined in a single paragraph! Thus, importance is sometimes inversely proportional to text length... But let us become serious now. Why should an active historian outline, for the hundreth time, the life of Copernicus, while there are so many interesting, and often neglected, other astronomers? Before the chapter dealing with Aristoteles and other Greek thinkers, the author presents a very good introduction to prehistoric astronomy. Subsequent chapters cover medieval times (Sacrobosco), Copernicus, instruments (Apian), calendars and their makers, telescopes and theological conflicts, women in astronomy and celestial mechanics, "amateur" astronomers (Herschel and Bessel), philosophy and science (Kant and successors). "At the limits of knowledge" is the title of the last, somewhat scanty chapter on 20th century astronomy. The only confusing text is found on p. 43: Die exzentrische Lage der Spharen wurde von Hipparch im 2. Jahrhundert v. Chr. eingefuhrt. Cum grano salis, this is correct; Hipparchos assumed an eccentric orbit for the Sun. Furthermore, die Erde steht im Mittelpunkt des Deferenten, jedoch um den Betrag der Exzentrizitat E vom Mittelpunkt des Exzenters entfernt. A figure showing a deferent circle (and attached epicycle) with center M, and a lower point E called center of world = center of Earth in the caption, tries to illustrate this. The desperate reader does not find the eccenter in the figure, and also does not appreciate why the Earth is in the center of the deferent M when the caption says it is in E. The explanation is that for a planet, having two anomalies, the epicycle does not run on a concentric circle, usually called deferent, but on an eccenter. Thus, in the figure, the circle labelled deferent is the eccenter. In Cellarius' Harmonia Macrocosmica, Table 14, a similar figure explains it all: Eccentricus deferens epicyclum - the eccenter that carries around the epicycle. Since we have switched to Latin, we should mention that on p. 158, we encountered the sentence "in dubia pro res". Perhaps we are permitted to reply "si tacuisses, philosophus mansisses". The reader is cautioned: if this book is used as a road atlas for the history of astronomy, the reader will often find very rough sketches of the progress of astronomy, but from time to time

  9. Quantitative risk approaches for formaldehyde.

    PubMed

    Howlett, C T; Mathias, R; Friess, S

    1989-01-01

    Formaldehyde presents unique data that highlight significant issues in the extrapolation of animal studies to human risk assessments. Formaldehyde causes rare nasal cancer in rats at 15 ppm, but not at lower levels of 2 ppm and 0.5 ppm in the range of human exposures. Mice and hamster studies even at high levels have results similar to low dose rats. Higginson et al. reviewed the human epidemiology studies and concluded that no excess cancer risk was observed; and if a risk exists, it is very low. Formaldehyde is a natural metabolite--the human body turns over 51 g/day. Cells, therefore, have detoxification and other defence mechanisms to formaldehyde. Recent CIIT biomechanism results elucidate these factors. These data raise two issues: First, the appropriateness of linear quantitative risk methodology given the non-linear nature of the biological data. Either a non-linear (threshold) statistical model or NOEL approach are appropriate risk assessment techniques for formaldehyde. Second, the rare nasal cancer observed in rats also occurs in control animals. A comparison of relative risk between background and low formaldehyde exposures has been calculated for both groups. Non-linear (MLE) 5 stage multistage models estimate 0 per million risk from both background and 1 ppm of formaldehyde exposure. Linear or upperbound (95%) estimates are 7,200/million from background and 5,000/million from 1 ppm formaldehyde. These estimates have a significant impact on formaldehyde regulatory programs for warning labels and "safe" exposure levels. PMID:2700168

  10. A quantitative philology of introspection

    PubMed Central

    Diuk, Carlos G.; Slezak, D. Fernandez; Raskovsky, I.; Sigman, M.; Cecchi, G. A.

    2012-01-01

    The cultural evolution of introspective thought has been recognized to undergo a drastic change during the middle of the first millennium BC. This period, known as the “Axial Age,” saw the birth of religions and philosophies still alive in modern culture, as well as the transition from orality to literacy—which led to the hypothesis of a link between introspection and literacy. Here we set out to examine the evolution of introspection in the Axial Age, studying the cultural record of the Greco-Roman and Judeo-Christian literary traditions. Using a statistical measure of semantic similarity, we identify a single “arrow of time” in the Old and New Testaments of the Bible, and a more complex non-monotonic dynamics in the Greco-Roman tradition reflecting the rise and fall of the respective societies. A comparable analysis of the twentieth century cultural record shows a steady increase in the incidence of introspective topics, punctuated by abrupt declines during and preceding the First and Second World Wars. Our results show that (a) it is possible to devise a consistent metric to quantify the history of a high-level concept such as introspection, cementing the path for a new quantitative philology and (b) to the extent that it is captured in the cultural record, the increased ability of human thought for self-reflection that the Axial Age brought about is still heavily determined by societal contingencies beyond the orality-literacy nexus. PMID:23015783

  11. Quantitative relationships in delphinid neocortex

    PubMed Central

    Mortensen, Heidi S.; Pakkenberg, Bente; Dam, Maria; Dietz, Rune; Sonne, Christian; Mikkelsen, Bjarni; Eriksen, Nina

    2014-01-01

    Possessing large brains and complex behavioral patterns, cetaceans are believed to be highly intelligent. Their brains, which are the largest in the Animal Kingdom and have enormous gyrification compared with terrestrial mammals, have long been of scientific interest. Few studies, however, report total number of brain cells in cetaceans, and even fewer have used unbiased counting methods. In this study, using stereological methods, we estimated the total number of cells in the neocortex of the long-finned pilot whale (Globicephala melas) brain. For the first time, we show that a species of dolphin has more neocortical neurons than any mammal studied to date including humans. These cell numbers are compared across various mammals with different brain sizes, and the function of possessing many neurons is discussed. We found that the long-finned pilot whale neocortex has approximately 37.2 × 109 neurons, which is almost twice as many as humans, and 127 × 109 glial cells. Thus, the absolute number of neurons in the human neocortex is not correlated with the superior cognitive abilities of humans (at least compared to cetaceans) as has previously been hypothesized. However, as neuron density in long-finned pilot whales is lower than that in humans, their higher cell number appears to be due to their larger brain. Accordingly, our findings make an important contribution to the ongoing debate over quantitative relationships in the mammalian brain. PMID:25505387

  12. Diagnose und Therapie einer Depression im höheren Lebensalter – Einflüsse von Patienten- und Arztmerkmalen

    PubMed Central

    von dem Knesebeck, Olaf; Bönte, Markus; Siegrist, Johannes; Marceau, Lisa; Link, Carol; McKinlay, John

    2013-01-01

    Zusammenfassung Studienergebnissee aus dem englischsprachigen Raum zeigen, dass diagnostische und therapeutische Entscheidungen von Hausärzten bei der Versorgung von depressiven Patienten systematischen Einflüssen unterliegen, und dass sowohl Merkmale des Arztes als auch des Patienten unabhängig vom Krankheitsbild Einfluss auf diese Entscheidungen haben. In der vorliegenden Arbeit werden Ergebnisse einer deutschen Studie präsentiert, in der die Einflüsse von Patienten- und Arztmerkmalen auf diagnostische und therapeutische ärztliche Entscheidungen bei einer Depression untersucht wurden. Unter Anwendung eines faktoriellen Experimentaldesigns spielten professionelle Schauspieler in Videofilmen die Rolle von Patienten, die Symptome für eine depressive Erkrankung äußern. In den Videofilmen, die alle auf einem identischen Skript basieren, wurden systematisch die Patientenmerkmale Alter (55 vs. 75 Jahre), Geschlecht und sozialer Status (Hausmeister vs. Lehrer) variiert. Die randomisierte Ärztestichprobe wurde nach dem Arztgeschlecht und professioneller Erfahrung (< 5 vs. > 15 Jahre) geschichtet. Der Videofilm wurde insgesamt 128 niedergelassenen Ärzten für Allgemeinmedizin und hausärztlich tätigen Internisten in ihrer Praxis vorgespielt. Danach wurden die Ärzte zu unterschiedlichen Aspekten von Diagnose und Therapie befragt. Es wurde erhoben, ob der Arzt dem Patienten über das gezeigte Gespräch hinausgehende Fragen stellen würde, welche Diagnosen er für wahrscheinlich hält, wie sicher er sich mit seiner Diagnose ist, welche diagnostischen Tests er anordnen würde, ob er den Patienten überweisen würde oder ob er Medikamente verordnen oder ihm Empfehlungen zur Änderung seines Lebensstils geben würde. Die Ergebnisse weisen darauf hin, dass sowohl die Diagnose als auch die Therapie einer Depression durch niedergelassene Hausärzte in Deutschland nur geringfügig durch die untersuchten Merkmale der Patienten und der behandelnden Ärzte beeinflusst wird. PMID:19274607

  13. Test of Von Baer's law of the conservation of early development.

    PubMed

    Poe, Steven

    2006-11-01

    One of the oldest and most pervasive ideas in comparative embryology is the perceived evolutionary conservation of early ontogeny relative to late ontogeny. Karl Von Baer first noted the similarity of early ontogeny across taxa, and Ernst Haeckel and Charles Darwin gave evolutionary interpretation to this phenomenon. In spite of a resurgence of interest in comparative embryology and the development of mechanistic explanations for Von Baer's law, the pattern itself has been largely untested. Here, I use statistical phylogenetic approaches to show that Von Baer's law is an unnecessarily complex explanation of the patterns of ontogenetic timing in several clades of vertebrates. Von Baer's law suggests a positive correlation between ontogenetic time and amount of evolutionary change. I compare ranked position in ontogeny to frequency of evolutionary change in rank for developmental events and find that these measures are not correlated, thus failing to support Von Baer's model. An alternative model that postulates that small changes in ontogenetic rank are evolutionarily easier than large changes is tentatively supported. PMID:17236417

  14. Evaluation of von Willebrand factor in COPD patients*

    PubMed Central

    Bártholo, Thiago Prudente; da Costa, Cláudia Henrique; Rufino, Rogério

    2014-01-01

    OBJECTIVE: To compare the absolute serum von Willebrand factor (vWF) levels and relative serum vWF activity in patients with clinically stable COPD, smokers without airway obstruction, and healthy never-smokers. METHODS: The study included 57 subjects, in three groups: COPD (n = 36); smoker (n = 12); and control (n = 9). During the selection phase, all participants underwent chest X-rays, spirometry, and blood testing. Absolute serum vWF levels and relative serum vWF activity were obtained by turbidimetry and ELISA, respectively. The modified Medical Research Council scale (cut-off score = 2) was used in order to classify COPD patients as symptomatic or mildly symptomatic/asymptomatic. RESULTS: Absolute vWF levels were significantly lower in the control group than in the smoker and COPD groups: 989 ± 436 pg/mL vs. 2,220 ± 746 pg/mL (p < 0.001) and 1,865 ± 592 pg/mL (p < 0.01). Relative serum vWF activity was significantly higher in the COPD group than in the smoker group (136.7 ± 46.0% vs. 92.8 ± 34.0%; p < 0.05), as well as being significantly higher in the symptomatic COPD subgroup than in the mildly symptomatic/asymptomatic COPD subgroup (154 ± 48% vs. 119 ± 8%; p < 0.05). In all three groups, there was a negative correlation between FEV1 (% of predicted) and relative serum vWF activity (r2 = ?0.13; p = 0.009). CONCLUSIONS: Our results suggest that increases in vWF levels and activity contribute to the persistence of systemic inflammation, as well as increasing cardiovascular risk, in COPD patients. PMID:25210959

  15. Development and Measurement of Preschoolers' Quantitative Knowledge

    ERIC Educational Resources Information Center

    Geary, David C.

    2015-01-01

    The collection of studies in this special issue make an important contribution to our understanding and measurement of the core cognitive and noncognitive factors that influence children's emerging quantitative competencies. The studies also illustrate how the field has matured, from a time when the quantitative competencies of infants and young…

  16. 78 FR 64202 - Quantitative Messaging Research

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-28

    ... COMMISSION Quantitative Messaging Research AGENCY: Commodity Futures Trading Commission. ACTION: Notice... message testing research (for which CFTC received fast- track OMB approval) and is necessary to identify... comments using only one method and identify that it is for the ``Quantitative Messaging Research.''...

  17. QUANTITATIVE SPECTROSCOPIC DETERMINATION OF HEMOGLOBIN CONCENTRATION AND

    E-print Network

    Fantini, Sergio

    QUANTITATIVE SPECTROSCOPIC DETERMINATION OF HEMOGLOBIN CONCENTRATION AND SATURATION IN A TURBID to the quantitative determination of hemoglobin concentration and saturation by near-infrared spectroscopy in turbid in the near-infrared, and the hemoglobin concentration was about 23 M. It was possible to reversibly saturate

  18. 6 Principles for Quantitative Reasoning and Modeling

    ERIC Educational Resources Information Center

    Weber, Eric; Ellis, Amy; Kulow, Torrey; Ozgur, Zekiye

    2014-01-01

    Encouraging students to reason with quantitative relationships can help them develop, understand, and explore mathematical models of real-world phenomena. Through two examples--modeling the motion of a speeding car and the growth of a Jactus plant--this article describes how teachers can use six practical tips to help students develop quantitative…

  19. Quantitative Photoacoustic Tomography , Hongkai Zhao2

    E-print Network

    Ferguson, Thomas S.

    Quantitative Photoacoustic Tomography Hao Gao1 , Hongkai Zhao2 , and Stanley Osher3 1 Department on quantitative photoacoustic tomography to recover optical maps from the deposited optical energy. After a brief-called gradient-based bound-constrained split Bregman method (GBSB). 1 Introduction Photoacoustic tomography (PAT

  20. Using Popular Culture to Teach Quantitative Reasoning

    ERIC Educational Resources Information Center

    Hillyard, Cinnamon

    2007-01-01

    Popular culture provides many opportunities to develop quantitative reasoning. This article describes a junior-level, interdisciplinary, quantitative reasoning course that uses examples from movies, cartoons, television, magazine advertisements, and children's literature. Some benefits from and cautions to using popular culture to teach…