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  • 2000-2004  (327)
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  • 1
    Monograph available for loan
    Monograph available for loan
    Hydrogeologische Methoden (2004)
    Berlin [u.a.] : Springer
    Details Availability
    Call number: 20-1/M 07.0169
    Description / Table of Contents: Die 2. überarbeitete und erweiterte Auflage der Hydrogeologischen Methoden basiert auf einer gründlichen Überarbeitung. Dies betrifft insbesondere die Darstellung von Durchlässigkeit und Transmissivität, Speicherkoeffizient und Porenraum sowie die Pumpversuche. Das von vielen Benutzern geschätzte Kapitel über statistische Verfahren in der Hydrogeologie wurde nicht übernommen. Dafür liegen im Schrifttum seit 1980 moderne, auf die elektronische Datenverarbeitung abgestimmte Bücher vor. Neue Darstellungen gibt es auch für solche hydrogeologische Methoden, die manche Fachkollegen und Praktiker vermissen werden. Neu hinzu gekommen sind Kapitel über die Hydrogeochemie für die Praxis", den Transport von Wasserinhaltsstoffen, Kontamination des Grundwassers und Sanierung von Grundwasserleitern, Grundwassermonitoring, Brunnenalterung und Regenerierung sowie Grundwasserwiederergänzung und -bilanz. Hydrogeologische Systemzusammenhänge werden schlüssig dargestellt und durch sehr viele anschauliche Abbildungen illustriert. Dies trifft auch auf die Definition und Ableitung der wichtigsten hydrogeologischen Kennwerte zu. In den Text eingefügte Beispiele erlauben es dem Benutzer, Lösungsweg und Berechnung nachzuvollziehen.
    Type of Medium: Monograph available for loan
    Pages: XIV, 1005 S. , Ill., graph. Darst. , 25 cm
    Edition: 2., überarb. und erw. Aufl.
    ISBN: 3540211268 , 978-3-540-21126-6
    Classification:
    Hydrology
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
    Series available for loan
    Series available for loan
    Simulation des Produktionsverhaltens gefracter Bohrungen in geringpermeablen Gaslagerstätten : 1. Projektphase (2004)
    Hamburg : DGMK
    Associated volumes
    Details Availability
    Call number: S 97.0506(593-9/1)
    In: Tight gas reservoirs - natural gas for the future
    Description / Table of Contents: Abstract: Moderne Fractechniken ermöglichen heute eine wirtschaftliche Gasförderung aus dichten Gaslagerstätten. Die Produktivität der gefracten Bohrungen bleibt aber häufig hinter den Prognosen zurück. Dies beruht u.a. auch auf Defiziten von konventionellen mathematischen Simulationsmethoden bei der Anwendung für die Produktionsanalyse von Tight Gas Reservoirs. Daraus entsteht die Notwendigkeit, mathematische Modelle der Fliessprozesse in geringpermeablen Trägergesteinen unter Berücksichtigung spezifischer Bedingungen und moderner physikalischer Vorstellungen aufzubauen. Ziel des Forschungsvorhabens ist die Erkundung des Potentials und der Defizite herkömmlicher Simulationsprogramme bei der Produktionsanalyse gefracter geringpermeabler Gaslagerstätten sowie die Weiterentwicklung der vorhandenen Standardsoftware mit Ableitung praxisbezogener Modellierungspraktiken.
    Type of Medium: Series available for loan
    Pages: II, 123 S.
    ISBN: 3936418217
    Series Statement: 593-9/1
    Classification:
    Deposits
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 3
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    Unknown
    Cenomanian palaeotemperatures derived from the oxygen isotopic composition of brachiopods and belemnites: evaluation of Cretaceous palaeotemperature proxies (2003)
    Springer
    Details
    Publication Date: 2003-03-25
    Print ISSN: 1437-3254
    Electronic ISSN: 1437-3262
    Topics: Geosciences
    Published by Springer
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    PAPER CURRENT
  • 4
    Electronic Resource
    Electronic Resource
    Predicting Material Parameters for Intrinsic Point Defect Diffusion in Silicon Crystal Growth (2003)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 95-96 (Sept. 2003), p. 35-42 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/26/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.95-96.35.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Strategies for structure solution and refinement of small organic molecules from electron diffraction data and limitations of the simulation approach (2000)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. 436-450 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: In recent years, a series of non-linear optically active bis(benzylidene) ketones have been synthesized and investigated by electron crystallography. In most cases, structure refinement was possible by combining electron diffraction analysis and quantum-mechanical calculations with maximum-entropy methods. However, when the torsional angles between the phenyl rings and the C=C double bonds are strongly affected by the crystal field, this method fails because packing-energy calculations are not sufficiently sensitive. This problem can be solved by refining the approximate model with SHELXL, if the data set is sufficiently accurate and the model close to the correct structure. Here it is shown that a considerably superior data set can be obtained at 300 kV with on-line data acquisition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767300006668
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  • 6
    Electronic Resource
    Electronic Resource
    Choosing Not To Choose: When Politicians Choose To Delegate Powers (2002)
    Oxford UK and Boston, USA : Blackwell Publishing Ltd.
    Kyklos 55 (2002), S. 0 
    Details
    ISSN: 1467-6435
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Sociology , Economics
    Notes: A first draft of this paper was written while the authors were with the Institute for Advanced Study, Berlin. They would like to thank its staff for its immense hospitality and Dieter Grimm, Larry Lessig, Rico Maggi, Dieter Sadowski, and Janes Sustersic for illuminating discussions of some of the ideas contained in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1467-6435.00187
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  • 7
    Electronic Resource
    Electronic Resource
    Channeling on boron clusters in silicon (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 5032-5037 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Low energy ion implantation at high doses of boron (〉1015 cm−2) in Si is necessary for the fabrication of ultrashallow junctions but can result in the undesirable presence of boron clusters. Values for the dimensions of the lattice distortions in the implanted Si are obtained by comparing the enhanced dechanneling and the direct scattering peak in the region with clusters in a channeled Rutherford backscattering spectrometry spectrum to those from Monte Carlo calculations on a curved crystal structure. Values of about 0.17 and 65 nm are found for the maximum deformation and the length of the distortions in the crystal, respectively, which implies that the lattice distortions extend significantly outside the layer in which the B clusters are supposed to be present. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1406968
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  • 8
    Electronic Resource
    Electronic Resource
    Influence of a partially oxidized calcium cathode on the performance of polymeric light emitting diodes (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 1376-1382 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We investigated the influence of the presence of oxygen during the deposition of the calcium cathode on the structure and on the performance of polymeric light emitting diodes (pLEDs). The oxygen background pressure during deposition of the calcium cathode of polymeric LEDs was varied. Subsequently, the oxygen depth distribution was measured and correlated with the performance of the pLEDs. The devices have been fabricated in a recently built ultraclean setup. The polymer layers of the pLEDs have been spincoated in a dry nitrogen atmosphere and transported directly into an ultrahigh vacuum chamber where the metal electrodes have been deposited by evaporation. We used indium–tin–oxide as anode, OC1C10 PPV as electroluminescent polymer, calcium as cathode, and aluminum as protecting layer. We achieved reproducibility of about 15% in current and brightness for devices fabricated in an oxygen atmosphere of (very-much-less-than)10−9 mbar. For further investigations the calcium deposition was carried out in an oxygen atmosphere from 10−8 to 10−5 mbar. We determined the amount of oxygen in the different layers of the current–voltage-light characterized pLEDs with elastic recoil detection analysis and correlated it with the characteristics of the devices. The external efficiency of the pLEDs decreases continuously with increasing oxygen pressure, the current shows a pronounced minimum. The brightness mostly decreases with increasing oxygen with an indication of a slight minimum. PLEDs with completely oxidized calcium are not operational. The first contact of the pLEDs with the dry glove box environment leads to an immediate reduction of current and brightness which is caused by the cooling of the devices by several degrees. Determining reproducible characteristics of pLEDs in the vacuum requires the measurement of their temperature. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1383577
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  • 9
    Electronic Resource
    Electronic Resource
    Life history of Daphnia galeata in a hypertrophic reservoir and consequences of non-consumptive mortality for the initiation of a midsummer decline (2002)
    Oxford, UK : Blackwell Science Ltd
    Freshwater biology 47 (2002), S. 0 
    Details
    ISSN: 1365-2427
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SUMMARY 1. Field and laboratory investigations were combined in a 2-year study on the initiation of a midsummer decline of Daphnia galeata Sars in a hypertrophic reservoir. Quantitative field samples were taken twice a week, and, adult and juvenile mortality rates were calculated. Patterns of reproduction and survival of daphnids born during spring and early summer under fluctuating food conditions were determined in life-table experiments.2. The abundance of Daphnia increased strongly in early May and declined in June 1998 (midsummer decline). In 1999, Daphnia density increased only slowly in spring and remained constantly high throughout the summer.3. Food conditions (concentrations of POC〈30 μm) for daphnids deteriorated in both years in response to increasing Daphnia densities, resulting in a clear-water phase of about 4 weeks. When Daphnia abundance declined in 1998, POC〈30 μm concentrations increased greatly, whereas in 1999 food conditions improved only slightly and Secchi depth remained high.4. Survival of daphnids in life-table experiments decreased greatly after food became rare and was strongly reduced in those animals born during the clear-water phase compared with those born later. In addition, age at first reproduction was retarded during the clear-water phase, resulting in very low population growth rates. Survivorship patterns in life-table experiments suggest a strong impact of non-consumptive mortality on Daphnia population dynamics.5. Field data of mortality point to differences in mortality patterns between years, probably resulting from different predation impacts of juvenile fish. In both years, however, adult mortality contributed substantially to overall mortality at the end of the clear-water phase. As bottom-up effects on D. galeata were very similar in both years, the significance of non-consumptive mortality on the initiation of midsummer declines appears to depend largely on recruitment patterns before the clear-water phase. A high impact can be expected when Daphnia populations are dominated by a peak cohort of nearly identical age during the clear-water phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2427.2002.00991.x
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  • 10
    Electronic Resource
    Electronic Resource
    A mass spectrometer system for analysis of polar stratospheric aerosols (2002)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 73 (2002), S. 446-452 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A balloon-borne mass spectrometer system has been flown successfully to determine the chemical composition of polar stratospheric aerosols over northern Scandinavia. The experiment combines an aerodynamic lens which collimates the aerosols into a narrow beam, a small sphere in which they evaporate, and a mass spectrometer for gas analysis. High-speed differential pumping by two liquid helium pumps effectively lowers the presence of ambient gases without affecting the particles of the beam. Field measurements and aerosol studies inside a large cryo-chamber have shown that the concept of particle focusing, evaporation and subsequent mass spectrometric gas analysis is a reliable technique to determine the molecular composition of aerosols especially in polar stratospheric clouds. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1430732
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