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  • 1
    Series available for loan
    Series available for loan
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Call number: SR 90.0001(1961)
    In: U.S. Geological Survey bulletin
    Type of Medium: Series available for loan
    Pages: VI, 21 S. + 1 pl.
    Series Statement: U.S. Geological Survey bulletin 1961
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 47 (1991), S. 923-934 
    ISSN: 1420-9071
    Keywords: Disease resistance ; genetic variations ; Mx system ; breeding techniques ; transgenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Genetic variations in disease resistance of farm animals can be observed at all levels of defence against infectious agents. In most cases susceptibility to infections has polygenic origins. In domestic animals only a few instances of a single genetic locus responsible for disease resistance are known. A well-examined example is the Mx1 gene product of certain mice strains conferring selective resistance to influenza virus infections. Attempts to improve disease resistance by gene transfer of different gene constructs into farm animals include the use of monoclonal antibody gene constructs, transgenes consisting of antisense RNA genes directed against viruses and Mx1 cDNA containing transgenes.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Machine vision and applications 7 (1994), S. 187-198 
    ISSN: 1432-1769
    Keywords: Motion computation ; Tracking ; Self-localization ; Image processing ; Navigation ; Camera calibration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This paper describes a real-time vision system that enhances the teleoperation of a servicing tool used in the heat exchangers of nuclear power plants. The vision system is used to track the position of the tool as it moves over a sheet of tube ends. A map-based strategy is adopted for the estimation of the position. The system incorporates a novel method for a foreshortening correction that is applied prior to map referencing. A hypothesize and verify scheme locates two image features that correspond to two map features. An efficient scheme for extracting image features is developed to locate these two features (tube-end centers) in the image. Two different types of heat-exchanger tube sheets are accounted for. They are those with tube ends placed in a square grid and those with tube ends placed in a triangular grid. The map-based strategy minimizes the cumulative errors in the estimate of the tool head position. The resulting low-cost system has been tested on synthetic and real data. Performance results are given.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Expression of the Q5 k gene was examined by northern blot analysis and polymerase chain reaction (PCR) in the AKR mouse and various cell lines, each of the H-2 k haplotype. Our results show that Q5 k mRNA is present during the whole postimplantational development of the AKR embryo/fetus (gestation day 6 to 15). In the juvenile mouse (week 2 to 4) transcription of the Q5 k gene persisted in all organs examined. In contrast, in the adult animal expression of the Q5 k gene was limited to the thymus and uterus of the pregnant mouse. Upon malignant transformation, the amount of Q5 k -specific mRNA increased dramatically in thymus and could also be observed in the spleen of thymoma bearing animals. Expression of the Q5 k gene was also detectable in several transformed mouse cell lines. Mitogen stimulation or treatment with cytokines induced Q5 k expression in primary spleen cell cultures. A possible explanation for the tissue-restricted expression in the adult AKR mouse is discussed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Informatik, Forschung und Entwicklung 10 (1995), S. 197-213 
    ISSN: 0949-2925
    Keywords: Schlüsselwörter: Software-Wiederverwendung ; Wartbarkeit ; Standards ; Qualitätssicherung ; Managementaspekte ; Einführung von Wiederverwendung ; CR Subject Classification: D.2.7 ; D.2.9 ; D.2.m
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Abstract. Reuse of existing software can significantly increase productivity and provide higher maintainability as well as higher product quality. Existing software systems in industrial practice are usually very heterogeneous – even within the same company. The software varies in age, problem domain, level of documentation, used development environments as well as in levels of software engineering consciousness and skills among the involved software developers and maintainers. We describe a model for reuse that provides three levels of reuse intensities/investments designed to lead from basic maintainability to a company-wide reuse culture. The model is based on suggestions in state-of-the-art reuse research and our experiences in two consulting projects with in-house-developers in the banking and insurance industry to meet local constraints of time and costs. Important roles of personnel and accompanying organizational measures are explained. Successful introduction of institutionalized reuse needs a shaping of the corporate culture, which must be oriented towards enhancing the potential of employees rather than toward trying out the hottest ideas of method-consultants or tool-vendors.
    Abstract: Key words: software reuse, maintainability, standards, quality assurance, management issues, introduction of reuse
    Notes: Zusammenfassung. Die Wiederverwendung bereits existierender Software verspricht sowohl höhere Produktivität als auch bessere Wartbarkeit und Produktqualität. In der industriellen und wirtschaftlichen Praxis anzutreffende Software ist allerdings schon innerhalb eines Unternehmens sehr heterogen. Sie variiert stark in Alter, Anwendungsgebiet, Dokumentationsgrad, verwendeter Entwicklungsumgebung und ist durch Programmierer mit unterschiedlichem Ausbildungsstand im Software-Engineering entstanden. Für die Einführung von Software-Wiederverwendung (Reuse) in der Praxis schlagen wir drei Entwicklungsstufen vor, die durch schrittweise steigende Investitionen von der Basis grundsätzlicher Wartbarkeit bis zu einer unternehmensweiten Reuse-Kultur führen. Das Modell baut auf Vorschlägen der Reuse-Forschung und unseren Erfahrungen mit zwei Beratungsprojekten aus der Praxis industrieller Software-Entwicklung im Bank- und Versicherungsbereich mit Rücksicht auf lokale Zeit- und Kostenbeschränkungen auf. Die für den Einsatz von Software-Wiederverwendung notwendigen Rollen der beteiligten Mitarbeiter und begleitende organisatorische Maßnahmen werden erklärt. Die erfolgreiche institutionalisierte Einführung von Wiederverwendung bedingt eine Anpassung der Unternehmenskultur, deren Verlauf sich mehr am Potential der vorhandenen Mitarbeiter orientieren muß als am Einsatz der neuesten Ideen von Methoden- oder Werkzeuganbietern.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Genes of Yersiniae spp. involved in production of the siderophore yersiniabactin are located on the high-pathogenicity island (HPI). Their transcription is controlled by the AraC/XilS-like transcriptional regulator YbtA encoded within the HPI. YbtA-regulated divergent and overlapping ybtA and irp6 promoters contain three YbtA binding sites, RS1, RS2 and RS3. Deleting RSs systematically and using ybtA and irp6 transcriptional fusions, we determined that different modes of YbtA binding are responsible for activation of irp6 and repression of ybtA. Based on these data, we propose a model of irp6 and ybtA promoter regulation.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 732 (1994), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 188 (1992), S. 740-745 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 0925-4773
    Keywords: DNase I hypersensitive sites ; Gene expression ; Liver ; Transgenic mice ; Tryptophan oxygenase
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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