278 resultados para Faber-Krahn
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Boberach: Knappen Darstellungen der Ereignisse in Baden, der Pfalz und Dresden 1849 und der Wiener Oktoberrevolution 1848 folgen Beiträge über Max Dortu, Gustav Schlöffel, Blum, August Bernigau, Messenhäuser [sic!], Lamartine, Bem, Graf Batthyani, Struve, Greiner, P. Fries, Reichard, Hepp, Hanitz, Nikolaus Schmitt, Cullmann [sic!], Goldmark, d'Ester, Franz Umbscheiden, Blenker, Raquillet [sic!], Sznayder [sic!], Zitz, Eisenstuck, Crzeriak, Fr. Ludwig Krahn, Dr. Sander, Jodokus Temme, Schulze-Delitzsch, Carl Vogt; eingefügt sind Briefe und Aufzeichnungen über die Prozesse in Rastatt, die Prager Unruhen im Juni 1848, die Kämpfe in Ungarn und die Lage der Emigranten, ferner Gedichte, u.a. von Herwegh
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Interplay of spin, charge, orbital and lattice degrees of freedom in oxide heterostructures results in a plethora of fascinating properties, which can be exploited in new generations of electronic devices with enhanced functionalities. The paradigm example is the interface between the two band insulators LaAlO3 and SrTiO3 that hosts a two-dimensional electron system. Apart from the mobile charge carriers, this system exhibits a range of intriguing properties such as field effect, superconductivity and ferromagnetism, whose fundamental origins are still debated. Here we use soft-X-ray angle-resolved photoelectron spectroscopy to penetrate through the LaAlO3 overlayer and access charge carriers at the buried interface. The experimental spectral function directly identifies the interface charge carriers as large polarons, emerging from coupling of charge and lattice degrees of freedom, and involving two phonons of different energy and thermal activity. This phenomenon fundamentally limits the carrier mobility and explains its puzzling drop at high temperatures.
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Submitted in partial fulfillment of the requirements for a Certificate in Orthodontics, Dept. of Orthodontics, University of Connecticut Health Center, 1975.
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Im Titel das Logezeichen in ausgeschriebener Form angegeben
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[Hrsg.: Conradus Pelicanus]
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Von Dr. F. C. von Faber
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Von Dr. F. C. von Faber
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Von Dr. F. C. von Faber
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Von Dr. F. C. von Faber
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von W. Knieschke
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Vorbesitzer: Johann Georg Gewandschneider
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Este trabajo consta, fundamentalmente, de dos partes bien diferenciadas. En la primera, se ubica al poeta Osvaldo Horacio Dondo (1902-1962) en el marco de las letras argentinas, cosa que se juzga necesaria, ya que hasta la década del 60 estuvo en la alta estima de muchos, pero luego cayó en el olvido generalizado. Su lugar es peculiar y representativo de aquellos que, habiéndose iniciado en el martinfierrismo, luego siguieron diversos derroteros; en este caso, el de la llamada vanguardia católica. Dondo es en sí mismo digno de ser considerado, como atestigua la autoridad de un Ara y la de un Aguirre, dos de los principales antólogos de la poesía argentina. El rescate de este autor será hecho, por un lado, teniendo en cuenta las antologías en tanto contracara ineludible de la historia de la literatura, de acuerdo con el ya canónico artículo de Alfonso Reyes (1952). Por otro lado, en la segunda parte, se ensaya un abordaje de su escritura desde el ángulo de la lectura como fenómeno complejo, que en cierta medida constituye un rasgo esencial del homo faber, además de actuar a modo de clave de interpretación de sus textos, especialmente los tardíos.
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Molecular and isotope compositions of headspace and total (free + sorbed) hydrocarbon gases from drilled cores of the three ODP Leg 104 Sites 642, 643, and 644 of the Voring Plateau are used to characterize the origin and distribution of these gases in Holocene to Eocene sediments. Only minor amounts of methane were found in the headspace (0.1 to < 0.001 vol%). Although methane through propane are present in all of the total gas samples, different origins account for the concentration and composition variations found. Site 643 at the foot of the outer Voring Plateau represents a geological setting with poor hydrocarbon generating potential, (sediments with low TOC and maturity overlying oceanic basement). Correspondingly, the total gas concentrations are low, typical for background gases (yield C1 - 4 = 31 to 232 ppb, C1/C2+ = 0.6 to 4; delta13C(CH4) -22 per mil to -42 per mil) probably of a diagenetic origin. Holocene to Eocene sediments, which overlie volcanic units, were drilled on the outer Vdring Plateau, at Holes 642B and D. Similar to Site 643, these sediments possess a poor hydrocarbon generating potential. The total gas character (yield C1 - 4 = 20 to 410 ppb; C1/C2+ = 1.7 to 13.3; delta13C(CH4) ca. -23 per mil to -40 per mil) again indicates a diagenetic origin, perhaps with the addition of some biogenic gas. The higher geothermal gradient and the underlying volcanics do not appear to have any influence on the gas geochemistry. The free gas (Vacutainer TM) in the sediments at Site 644 are dominated by biogenic gas (C1/C2+ > 104; delta13C(CH4) -77 per mil). Indications, in the total gas, of hydrocarbons with a thermogenic signature (yield C1 - 4 = 121 to 769 ppb, C1/ C2+ = 3 to 8; delta13C(CH4) = -39 per mil to -71 per mil), could not be unequivocally confirmed as such. Alternatively, these gases may represent mixtures of diagenetic and biogenic gases.