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  • Chemistry  (1)
  • Innovation  (1)
  • Superconducting radiation detectors  (1)
  • 1
    ISSN: 1432-1386
    Schlagwort(e): Technometrics ; Technological excellence ; Innovation ; Schumpeter ; Evolutionary models ; O30 ; O33
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Wirtschaftswissenschaften
    Notizen: Abstract What is the relation between the average level of complexity that characterizes a product's technology, and the degree of diversity of that technology across rival firms? Evolutionary theories of innovation and technical advance are consistent with either a direct or an inverse relation. The issue thus becomes an empirical one. This paper uses a unique database containing detailed quantitative data on the specifications of 12 high-tech product groups for the U.S., Japan and selected European countries, for 1982, for both products and processes. It is found that the more complex the technology, the less diverse is the technology of rival firms that produce the product. This is consistent with the following evolutionary process: Economies of scale and scope inherent in high-level technologies require firms who adopt them to dispose entirely of older technologies, in order to remain competitive; at the same time, older, simpler technologies continue to exist and permit wide diversities among firms who pursue “niche” market strategies.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Journal of superconductivity 7 (1994), S. 871-884 
    ISSN: 1572-9605
    Schlagwort(e): Superconducting radiation detectors ; photoresponse ; nonequilibrium optical response ; optical properties ; thermal design
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik
    Notizen: Abstract This work summarizes the progress in the study of the superconductor response to optical radiation and in the development of infrared detectors. The recent advances in the design of high-T c superconducting radiation detectors using silicon microfabrication technology are emphasized. Thermal and optical properties important for the detector performance are discussed. The mechanism of the nonequilibrium optical response and its potential use to build fast and sensitive radiation detectors are described. Future challenges and opportunities in the development of high-T c superconducting radiation detectors are highlighted.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    New York : Wiley-Blackwell
    Biopolymers 8 (1969), S. 661-668 
    ISSN: 0006-3525
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The synthesis of poly(L-leucyl-L-ornithyl-L-leucine) and of poly(L-leucyl-L-arginyl-L-leucine) is reported. The antibacterial action of the two copolymers was checked by growth inhibition experiments on Staphylococcus aureus. The activity was found to be identical with that of a disordered 1:1 copolymer of L-ornithine and L-leucine. Conversion of 75% of the ornithine residues to arginine had no effect on the antibacterial activity.
    Zusätzliches Material: 1 Tab.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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