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  • Articles: DFG German National Licenses  (27)
  • 1985-1989  (19)
  • 1910-1914  (8)
  • 11
    Electronic Resource
    Electronic Resource
    188. Die komplette implantierte PTC-Drainage (1987)
    Springer
    Langenbeck's archives of surgery 372 (1987), S. 841-841 
    Details
    ISSN: 1435-2451
    Keywords: Malignant bile duct closure ; PTC drainage ; Maligner Gallenwegsverschluss ; PTCD
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei Patienten mit malignem Gallenwegsverschluss besteht eine Möglichkeit zur Palliation in der PTCD. Um die Nachteile der Methode zu reduzieren, haben wir in geeigneten Fällen den äusseren Schenkel des Drainage-Katheters mit einem Injektionsport verbunden und subcutan implantiert. Auch ohne äussere Drainage kann der Katheter somit über den Port gespült werden. Bei den 10 bisher implantierten Ports kam es zu keiner Lumenverlegung. Um das Infektionsrisiko nicht zu erhöhen, ist die Anlage der PTCD und die Implantation in der gleichen Sitzung notwendig.
    Notes: Summary One possible method of provide palliative treatment for patients with malignant bile-duct closure is the use of PTC drainage. To minimize the disadvantages of the method, in certain cases we connected the external branch of the catheter with an injection porta and implanted it subcutaneously. Even without external drainage, the catheter can be flushed by using the porta. So far, there have been no cases of catheter blockage in the ten portae implanted. To reduce the risk of infection, PTC drainage and subcutaneous implantation must be carried out at the same time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01297972
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    Paper (German National Licenses)
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  • 12
    Electronic Resource
    Electronic Resource
    Decay channels of core excitation resonances in 3d and 4f metal atoms (1986)
    Springer
    The European physical journal 2 (1986), S. 347-362 
    Details
    ISSN: 1434-6079
    Keywords: 3280F
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Photoabsorption, photoelectron, and ejected electron spectra of atomic 3d metals and rare earths in the energy range of the strong 3p→3d and 4d→(4fεf) excitations are presented. TheZ-dependence of the strength, shape and decay channels of the giant resonances is discussed. With increasing Z for the 3d metals the 3p→3d resonances change from almost symmetric lines close to the 3p-ionization limits to broad asymmetric profiles centered well below the 3p-ionization threshold. Autoionization leading to the emission of a 3d electron dominates the decay. For lowZ rare earths the 4d→(4fεf) resonances mainly decay via the emission of a 4d electron whereas for higherZ the emission of a 4f electron takes over.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01426239
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    Paper (German National Licenses)
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  • 13
    Electronic Resource
    Electronic Resource
    Book reviews (1985)
    Springer
    Mathematical methods of operations research 29 (1985), S. 132-139 
    Details
    ISSN: 1432-5217
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Summary It is a pleasure to read this book. The state of art for Newton-type methods is given. It is strongly recommended also for teaching purposes. Numerical analysis is presented in an optimal way including both theory and computational aspects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01918202
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  • 14
    Electronic Resource
    Electronic Resource
    A sophisticated expert system for the diagnosis of a CNC machining center (1988)
    Springer
    Mathematical methods of operations research 32 (1988), S. 251-269 
    Details
    ISSN: 1432-5217
    Keywords: expert systems ; diagnosis ; deep models ; knowledge acquisition ; learning ; temporal representation ; mechanical engineering
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Description / Table of Contents: Zusammenfassung Im gleichen Maße, wie diagnostische Expertensysteme in immer umfangreichere und komplexere Aufgabenstellungen vordringen, zeigt sich, daß ausschließlich regelbasierte, assoziative Ansätze keine angemessene Lösung mehr darstellen. Ein typisches Beispiel für eine solche Situation ist die Diagnose von CNC-Bearbeitungszentren, deren komplexe innere Struktur und die spezifische Vorgehensweise des Experten explizit in der Wissensbasis repräsentiert werden müssen. In diesem Artikel beschreiben wir drei Richtungen, in denen die“konventionelle” Expertensystemarchitektur erweitert werden kann, um den gestiegenen Anforderungen zu entsprechen. Unser System stützt sich auf ein Struktur- und Funktionsmodell des Bearbeitungszentrums, das das in Regelform gespeicherte Wissen ergänzt. Die Verwendung des Modells stellt neuartige Anforderungen an die Wissensakquisition, die durch eine enge Verzahnung mit dem Lernmechanismus des Expertensystems unterstützt wird. Schließlich gehen wir auf die zeitlichen Aspekte der Diagnosesituation ein, die eine spezielle Behandlung der dynamischen Maschinenprozesse und der sich darin entwickelnden Fehler erfordern.
    Notes: Abstract As the domains of diagnostic expert systems become larger and more complex, purely associative approaches are no longer adequate solutions. A good example for such a situation is the diagnosis of a CNC machining center where the diagnostic process has a rich inner structure that has to be reflected in the system. In this article we describe three ways of extending the conventional expert system architecture. Firstly, our system uses a structural model of the machining center in addition to production rules. Secondly, we pay special attention to knowledge acquisition which is intimately related to the learning process. Finally, several temporal aspects of the diagnostic situation are addressed explicitly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01928926
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  • 15
    Electronic Resource
    Electronic Resource
    Catalytic relevance of phase transformations accompanying the gas phase oxidation of ethanol on silica supported vanadia (1985)
    Springer
    Reaction kinetics and catalysis letters 27 (1985), S. 115-119 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Активность нестационарного состояния газофазного окисления этанола в простом проточном реакторе и ее зависимость от предварительной обработки и условий реакции могут быть объяснены на основе ранее предложенной модели возможных поверхностных фаз ванадия на кремневом носителе.
    Notes: Abstract Nonsteady state activity during the gas phase oxidation of ethanol in a simple flow reactor and its dependence on pretreatment and reaction conditions can be explained utilizing the previously presented model of possible surface vanadia phases on silica.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02064469
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  • 16
    Electronic Resource
    Electronic Resource
    Influence of Cr loading on the catalytic properties of CrO3/SiO2 catalysts in 2-propanol conversion (1985)
    Springer
    Reaction kinetics and catalysis letters 29 (1985), S. 211-218 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Каталитическая активность образцов CrO3/SiO2 для превращения 2-пропанола обуславливается лишь небольшим количеством активных центров (оцениваемое около 1017 на грамм катализатора), в то время как избыток хрома и не повышает каталитическую активность и не ингибирует реакциь на активных центрах. Лишь тогда, когда загрузка хрома достаточно высока чтобы позволить образование блоко-подобных агломератов (5 вес.% Cr), 2-пропанол превращается также на этой CrOx поверхностной фазе, но со значительно более высокой энергией активации.
    Notes: Abstract Catalytic activity of CrO3/SiO2 samples for 2-propanol conversion is governed by only a small amount of active centers (estimated to be around 1017 per gram of catalyst), whereas excess chromium neither develops catalytic activity nor inhibits the reaction on the active sites. Only when the chromium loading is high enough to allow formation of bulk-like agglomerates (5 wt.% Cr) is 2-propanol converted also on this CrOx surface phase, but with a significant higher activation energy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02067970
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  • 17
    Electronic Resource
    Electronic Resource
    Molecular oxidic phases of diluted silica supported vanadia (1985)
    Springer
    Reaction kinetics and catalysis letters 27 (1985), S. 109-114 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Различные поверхностные фазы ванадиевых катализаторов на носителе SiO2 были охарактеризованы статической адсорбцией, а также экспериментами восстановления и реокисления в условиях вакуума. Очевидная подвижностя ванадия, участвующего в некоторых ступенях получения, приводит к увеличению разнообразия исходных фаз прекурсора в зависимости от условий предварительной обработки и концентрации SiOH.
    Notes: Abstract Different surface phases of silica supported vanadia catalysts have been characterized by static adsorption, reduction, and reoxidation experiments under vacuum conditions. The obvious mobility of vanadium involved in some preparation steps gives rise to a diversification of initial precursor phases as a function of pretreatment conditions and SiOH concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02064468
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  • 18
    Electronic Resource
    Electronic Resource
    An all-glass vibration mixed reactor for gas/solid catalyzed reactions (1987)
    Springer
    Reaction kinetics and catalysis letters 34 (1987), S. 21-27 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Описан стеклянный лабораторный реактор с вибрционным перемешиванием, работающий в режиме бакового реактора с непрерывным перемешиванием. Изучены характеристики смешивания и переноса массы, последняя для конверсии пропан-2-ола на катализаторе CrO3/SiO2. Результаты пополняют даннюе, сообщенные в ссылке [6].
    Notes: Abstract An all-glass vibration mixed laboratory reactor is described which operates as a continuous stirred tank reactor. The mixing and mass transfer characteristics are studied, the latter for the conversion of propan-2-ol in air on the CrO3/SiO2 catalyst system. The results complete data of Ref. [6].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02069195
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  • 19
    Electronic Resource
    Electronic Resource
    Die Adsorption von Chlorid an einem austenitischen Cr-Ni-Stahl bei hohen Temperaturen (1988)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 39 (1988), S. 355-364 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The adsorption of chloride on austenitic Cr-Ni-steel at high temperaturesUsing the radioactive isotope chlorine-36 and nuclear physical measuring methods (gas-flow radiation detector, autoradiography) chloride adsorbed on metal surfaces can be detected with a detection limit of 10-10 g cm-2 and a local resolution of at least 5 μm. This method was developed for investigating the chloride adsorption on the protective layers on an austenitic Cr-Ni-Steel (X 8 CrNiTi 18.10) under high temperature conditions at 250°C. Three different kinds of chloride adsorption could be distinguished: homogeneous chloride distribution across the whole surface, high localized chloride concentrations in places of local corrosion attack and local deposition of chloride by heat and mass transfer. The results obtained enabled attack concepts for the mechanism of action of the chloride were derived. Potential applications of this method to the rapid detection of chlorideinduced corrosion processes (pitting corrosion, stress corrosion cracking or crevice corrosion) or to the quantitative estimation of thermohydraulic concentration processes are mentioned.
    Notes: Durch Verwendung des radioaktiven Isotops Chlor-36 und kernphysikalischer Meßmethoden (Gasdurchflußzählrohr, Autoradiographie) kann an Stahloberflächen adsorbiertes Chlorid mit einer Nach-weisgrenze von 10-10 g/cm2 bei einem lokalen Auflösungsvermögen von mindestens 5 μm nachgewiesen werden. Diese Methode wurde benutzt, um die Chloridadsorption an den Schutzschichten eines austenitischen Cr-Ni-Stahls (X 8 CrNiTi 18 10) bei hohen Temperaturen (250°C) zu untersuchen. Dabei konnten drei unterschiedliche Arten der Chloridadsorption festgestellt werden: gleichmäßig flächenhafter Belag, hohe, örtlich begrenzte Chloridkonzentration an Stellen des lokalen Korrosionsangriffs und lokale Anreicherung von Chlorid durch Wärme- und Stofftransportvorgänge. Aus den Ergebnissen wurden Vorstellungen zum Wirkmechanismus des Chlorids abgeleitet. Auf die Anwendungsmöglichkeiten der Methode zum schnellen Nachweis eines chloridinduzierten Korrosionsprozesses (Lochfraß-, Spannungsriß- oder Spaltkorrosion) bzw. zur quantitativen Bewertung von thermohydraulischen Anreicherungsprozessen wird hingewiesen.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19880390802
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  • 20
    Electronic Resource
    Electronic Resource
    Über Oxonium - hydrosulfide des p-Benzochinons (1910)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 43 (1910), S. 3599-3603 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.191004303155
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