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Schriftenreihen ausleihbar

Die Südalpen zwischen Gardasee und Friaul : Trentino, Veronese, Vicentino, Bellunese ; mit 4 Tabellen im Text (1993)

Geyer, Otto F.

Berlin [u.a.] : Borntraeger

Dazugehörige Bände

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Signatur: 9/S 93.0082(86)

In: Sammlung geologischer Führer

Materialart: Schriftenreihen ausleihbar

Seiten: XIII, 576 S.

ISBN: 3443150608

ISSN: 0343-737X

Serie: Sammlung geologischer Führer 86

Sprache: Deutsch

Standort: Lesesaal

Zweigbibliothek: GFZ Bibliothek

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Carbohydrate structure of Marburg virus glycoprotein (1992)

Geyer, Hildegard ; Will, Christiane ; Feldmann, Heinz ; [weitere]

Oxford University Press

In: Glycobiology. 1992; 2(4): 299-312. Published 1992 Jan 01. doi: 10.1093/glycob/2.4.299.

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Publikationsdatum: 1992-01-01

Print ISSN: 0959-6658

Digitale ISSN: 1460-2423

Thema: Biologie , Medizin

Publiziert von Oxford University Press

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3

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Oligosaccharide profiles of HIV-2 external envelope glycoprotein: dependence on host cells and virus isolates (1994)

Liedtke, Steffen ; Adamski, Michalina ; Geyer, Rudolf ; [weitere]

Oxford University Press

In: Glycobiology. 1994; 4(4): 477-484. Published 1994 Jan 01. doi: 10.1093/glycob/4.4.477.

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Publikationsdatum: 1994-01-01

Print ISSN: 0959-6658

Digitale ISSN: 1460-2423

Thema: Biologie , Medizin

Publiziert von Oxford University Press

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4

Digitale Medien

Surface modification during scanning tunneling microscope measurements on YBa2Cu3O7 thin films (1994)

Geyer, Ulrich ; von Minnigerode, Gunther ; Krebs, Hans-Ulrich

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 76 (1994), S. 7774-7777

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: During scanning tunneling microscopy measurements on YBa2Cu3O7 thin films with positive sample bias voltages, different kinds of surface modifications appear. While in the topography condition no surface modification occurs, the cleaning and etching conditions irreversibly change the surface topography. In the deformation condition a strong elastic deformation of the tip and/or the surface is observed. It is shown that field evaporation of material from the surface to the tip is responsible for the observed surface modification. In consequence, the tip is contaminated with different oxides. Localized states in the oxides make resonant tunneling of electrons through the oxide layer possible. The configuration of these localized states determines the kind of surface modification by the scanning tunneling microscope. © 1994 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.357955

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Digitale Medien

Defect characterization in amorphous silicon based solar cells by subband-gap spectroscopy with constant photocurrent measurements (1991)

Frammelsberger, W. ; Rübel, H. ; Lechner, P. ; [weitere]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 58 (1991), S. 2660-2662

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ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: We used the constant photocurrent method to characterize a-Si:H based pin cells in order to discuss the correlation between the device characterizing quantity, the fill factor (FF), and the number of defects which is related to the quantity αD (subbandgap optical absorption constant). We show that the changes in the i layer due to the creation of metastable defects after light soaking or current injection−characterized by αD−directly correlate with the changes in solar cell performance (FF). We are able to show that other reasons than an increased defect density can lead to a reduction of the fill factor. Further we try to quantify αD in terms of a defect density of states.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.104799

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Island growth and surface topography of epitaxial Y-Ba-Cu-O thin films on MgO (1991)

Krebs, H. U. ; Krauns, Ch. ; Yang, Xiaoguang ; [weitere]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 59 (1991), S. 2180-2182

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ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: High-quality epitaxial Y1B2Cu3Ox thin films (Tc,o ≥ (R18) 90 K, jc (77 K)≥ (R18)3 ×106A/cm2) were in situ grown on MgO by KrF excimer laser ablation. The combination of in situ resistance measurements, x-ray diffraction experiments, Tc measurements, scanning electron microscopy and scanning tunneling microscopy gives clear indications for an island growth on these substrates and shows growth steps and spirals at the film surface.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.106066

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Norbert Wiener and the Social Sciences (1994)

Geyer, Felix ; Zouwen, Johannes van der

Bingley : Emerald

Kybernetes 23 (1994), S. 46-61

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ISSN: 0368-492X

Quelle: Emerald Fulltext Archive Database 1994-2005

Thema: Informatik

Notizen: Aims to analyse the influence of Norbert Wiener's ideas on the social sciences and on social systems, including society as a whole. Describes Wiener's own attitudes regarding the applicability of cybernetics to social systems and his vision on the development of modern society. Highlights sociologists and political scientists who were inspired by his ideas and deals with researchers who tried to apply his ideas to social systems. Concludes by evaluating to what extent specific ideas of Wiener have impacted on the social sciences.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1108/03684929410068334

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Alienation, Participation and Increasing Societal Complexity (1994)

Geyer, Felix

Bingley : Emerald

Kybernetes 23 (1994), S. 10-34

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ISSN: 0368-492X

Quelle: Emerald Fulltext Archive Database 1994-2005

Thema: Informatik

Notizen: Provides definitions of the three concepts in the title and explores their interrelationships. Distinguishes six alienation dimensions - powerlessness; meaninglessness; normlessness; social isolation; cultural estrangement; self-estrangement - and combines them with three kinds of participation: spontaneous, negative, and compensatory. Describes increasing societal complexity from a general systems perspective. Explores the psycho- and sociogenesis of unalienated as well as alienated participation. Increasing societal complexity creates new forms of alienation and participation, but also resistances of groups that feel threatened or left out by an excessively fast rate of change, which in turn threatens macro-societal stability. Those left without the means to participate in the economic or political process tend to be the alienated "negative participants"; they are generally destructive and anti-outgroup as a result of personal experiences or economic deprivation.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1108/03684929410054852

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