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  • 1
    Monographie ausleihbar
    Monographie ausleihbar
    MAP3S/RAINE modeling abstracts 1980 (1980)
    Upton, N.Y. [u.a.] : Brookhaven National Laboratory
    Details Verfügbarkeit
    Signatur: MOP B 17294
    Materialart: Monographie ausleihbar
    Seiten: iv, 35 S. ; 28 cm
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Monographie ausleihbar
    Monographie ausleihbar
    Glossar Bergmännische Wasserwirtschaft (2017)
    Neustadt/Wstr. : Arbeitskreis Grubenwasser der Fachsektion Hydrogeologie e.V. in der DGGV e.V. (FH-DGGV)
    Details Verfügbarkeit
    Signatur: M 18.91460
    Materialart: Monographie ausleihbar
    Seiten: 78 Seiten
    Ausgabe: 1. Auflage
    ISBN: 9783926775726
    Sprache: Deutsch , Englisch
    Zweigbibliothek: GFZ Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Dense negative ion currents from laser produced plasma : Proceedings of the 5th international conference on ion sources (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 1182-1184 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Recent studies on the Munich laser ion source were aimed at the understanding and optimization of the production mechanism of negative ions. The possibility of extremely high, pulsed negative ion currents is due to the outstanding features of the laser produced plasma: a high electron density in conjunction with a low electron temperature. The intensity of the laser beam is restricted to a relatively small range from 5×107 up to 1×109 W/cm2. More than 20 different ions have been produced from pure element targets and from a number of salts. The yields achieved are in good agreement with a model including Saha equilibrium distributions. The comparison between pure elemental targets and alloys or salt shows a strong influence of ions with a low ionization potential on the negative ion production.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1145240
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  • 4
    Digitale Medien
    Digitale Medien
    Nonlinear grating interaction in photorefractive Bi12SiO20 (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 792-794 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Recently significant crosstalk has been observed in a multibeam experiment in which gratings were previously thought to be independent. In this letter, it is shown that the crosstalk is due to a coherent nonlinear combination of the primary gratings, which causes additional peaks to occur in the diffraction pattern and changes the diffraction efficiency of the primary gratings explaining the apparent crosstalk. It is shown that the effect can be derived from the band transport model when all the terms in the expression for the generation of charge carriers are retained. Results are presented for a configuration consisting of a reference beam and two object beams and show experimental results that confirm the model. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.114190
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  • 5
    Digitale Medien
    Digitale Medien
    STREAMS IN THE URBAN LANDSCAPE (2001)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Ecology, Evolution, and Systematics 32 (2001), S. 333-365 
    Details
    ISSN: 0066-4162
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Biologie
    Notizen: Abstract The world's population is concentrated in urban areas. This change in demography has brought landscape transformations that have a number of documented effects on stream ecosystems. The most consistent and pervasive effect is an increase in impervious surface cover within urban catchments, which alters the hydrology and geomorphology of streams. This results in predictable changes in stream habitat. In addition to imperviousness, runoff from urbanized surfaces as well as municipal and industrial discharges result in increased loading of nutrients, metals, pesticides, and other contaminants to streams. These changes result in consistent declines in the richness of algal, invertebrate, and fish communities in urban streams. Although understudied in urban streams, ecosystem processes are also affected by urbanization. Urban streams represent opportunities for ecologists interested in studying disturbance and contributing to more effective landscape management.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.ecolsys.32.081501.114040
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  • 6
    Digitale Medien
    Digitale Medien
    Crime prevention through environmental design (CPTED): a review and modern bibliography (2005)
    Bingley : Emerald
    Property management 23 (2005), S. 328-356 
    Details
    ISSN: 0263-7472
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Wirtschaftswissenschaften
    Notizen: Purpose - The purpose of this paper is to critically review the core findings from recently published place-based crime prevention research. The paper aims to critically evaluate the available evidence on the contribution of crime prevention through environmental design as a crime prevention strategy. Design/methodology/approach - Large-scale evaluations of crime prevention through environmental design (CPTED) are reviewed with a view to clarifying current knowledge on the evidence of crime prevention through environmental design. Findings - The review concludes that there is a growing body of research that supports the assertion that crime prevention through environmental design is effective in reducing both crime and fear of crime in the community. Research limitations/implications - Although the paper may not review all the evaluations of CPTED, it nonetheless provides a detailed compilation and overview of the most significant research in the area, including an extensive and modern bibliography on the subject. Research implications will be the subject of a forthcoming paper. Practical implications - CPTED is an increasingly fashionable approach and is being implemented on a global scale. Additionally, individual components such as territoriality, surveillance, maintenance, access control, activity support and target-hardening are being widely deployed. However, the evidence currently available is inconclusive and much criticised, which effectively prevents widespread intervention and investment by central government. The paper details the difficulties associated with demonstrating the effectiveness of CPTED. Originality/value - The paper concludes that although empirical proof has not been definitively demonstrated, there is a large and growing body of research, which supports the assertion that crime prevention through environmental design is a pragmatic and effective crime prevention tool. This review provides an extensive bibliography of contemporary crime prevention through environmental design and a follow-up paper will discuss the future research priorities for it.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1108/02637470510631483
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  • 7
    Digitale Medien
    Digitale Medien
    Entrepreneurial leadership in high-tech firms: a field study (2002)
    Bingley : Emerald
    Leadership & organization development journal 23 (2002), S. 380-389 
    Details
    ISSN: 0143-7739
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Wirtschaftswissenschaften
    Notizen: There are many known reasons why hot start-ups fail - new technologies, new markets, new distribution channels, inexperienced management teams, etc. - but an unquestionably critical factor is the leadership ability of the entrepreneurial CEO. Conventional wisdom states that professional managers should replace founders because they customarily do not have the necessary leadership skills and experience to further the continued growth of the organization. Recent research, however, has found no evidence that professional managers perform better in high-growth firms than the original founder. This investigation analyzed the experiences of 27 entrepreneurial CEOs who successfully defied conventional wisdom by leading their organizations from tenuous start-up to professionally managed enterprise. The research revealed two distinct sets of leadership competencies - labeled self competencies and functional competencies - required of entrepreneurs aspiring to remain at the helm of growth-driven high-tech firms.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1108/01437730210445810
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  • 8
    Digitale Medien
    Digitale Medien
    The simplicity of metazoan cell lineages (2005)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 433 (2005), S. 152-156 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Developmental processes are thought to be highly complex, but there have been few attempts to measure and compare such complexity across different groups of organisms. Here we introduce a measure of biological complexity based on the similarity between developmental and computer programs. We ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nature03178
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  • 9
    Digitale Medien
    Digitale Medien
    Association of qacE and qacEΔ1 with multiple resistance to antibiotics and antiseptics in clinical isolates of Gram-negative bacteria (2000)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 183 (2000), S. 0 
    Details
    ISSN: 1574-6968
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Clinical isolates of Enterobacter cloacae, Citrobacter freundii, Pseudomonas aeruginosa, and Stenotrophomonas maltophilia were tested for resistance to antibiotics and to the antiseptics benzalkonium chloride and cetyltrimethylammonium bromide. Furthermore, they were examined for the presence of the resistance genes qacE and qacEΔ1. qacEΔ1 was detected by PCR in 10% of all (n=103) and in 81% of multiply antibiotic-resistant strains (n=15). qacE was found in only one of 37 P. aeruginosa strains. The minimum inhibitory concentrations of benzalkonium chloride, cetyltrimethylammonium bromide, and ethidium bromide were not significantly different for qacEΔ1/qacE-positive or -negative strains. Our data indicate that multiply antibiotic-resistant Gram-negative bacteria are not necessarily more resistant to quaternary ammonium compounds than antibiotic-sensitive strains even though qacE or qacEΔ1 is present.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1574-6968.2000.tb08939.x
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  • 10
    Digitale Medien
    Digitale Medien
    Sucrose-mediated regulation of fatty acid composition in asexual embryos of Theobroma cacao (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 53 (1981), S. 0 
    Details
    ISSN: 1399-3054
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Asexual embryos of Theobroma cacao L. cultured in vitro grew to a size and fresh weight equal to mature zygotic embryos in vivo when cultured in liquid medium on a rollodrum apparatus. Changes in the fatty acid composition in the asexual embryos, similar to those which occur in the zygotic embryo during normal maturation, were stimulated as the sucrose concentration in the medium was increased to an optimum at 27% sucrose (w/v). As the sucrose concentration increased, there was a shift in the fatty acid composition from predominantly polyunsaturated to saturated and monounsaturated fatty acids characterized by an increase in the mole percents of stearic (18:0) and oleic (18:1) acids and a decrease in the mole percents of linoleic (18:2) and linolenic acids (18:3).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1399-3054.1981.tb04516.x
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