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  • 1
    Series available for loan
    Series available for loan
    Interpretations of pH alkalinity in well waters from southwestern Sweden (1989)
    Göteborg : Geologiska Inst.
    Associated volumes
    Details Availability
    Call number: SR 91.0154(66)
    In: Publikationer
    Type of Medium: Series available for loan
    Pages: Getr. Zählung
    Series Statement: Publikationer / Geologiska Institutionen, Chalmers Tekniska Högskola : A 66
    Language: Undetermined
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    So stirbt der Wald : Schadbilder und Krankheitsverlauf (1986)
    München : BLV-Verlagsgesellschaft
    Details Availability
    Call number: MOP 47168 / Mitte
    Type of Medium: Monograph available for loan
    Pages: 127 Seiten , Illustrationen , 19 cm
    Edition: Fünfte, durchgesehene Auflage
    ISBN: 3405131014 (kart.)
    Series Statement: BLV-Umweltwissen
    URL: Inhaltsverzeichnis
    Language: German
    Note: Inhalt: Vorwort Einführung Das Waldsterben - eine Komplexkrankheit Die Fichte läßt aufhorchen Ausdehnung der Krankheit Auch junge Bestände betroffen Kiefer und Laubbäume machen keine Ausnahme Ein ganzes Ökosystem ist in Gefahr Das Ausmaß der Schäden Die Ursachen Wirtschaftsweise ohne Einfluß Klassische Rauchschäden - Waldsterben Die Vielfalt der Symptome Ratschläge für die Schadensfeststellung Tanne Wissenswertes zur Tanne Geschichte der Erkrankung Krankheitssymptome Der Naßkern der Tanne und seine Bedeutung Krankheitsverlauf Vermehrungsfähigkeit Was nicht zum Tannensterben gehört Zusammenfassung der Schadsymptome Fichte Wissenswertes zur Fichte Geschichte der Erkrankung Krankheitssymptome Zusammenfassung der Schadsymptome Kiefer Wissenswertes zur Kiefer Geschichte der Erkrankung Krankheitssymptome Weitere Einflußgrößen Was muß bei der Beurteilung der Schäden an Kiefer beachtet werden? Andere Absterbeerscheinungen an Kiefer Zusammenfassung der Schadsymptome Buche Wissenswertes zur Buche Geschichte der Erkrankung Krankheitssymptome Andere Erkrankungen an Buche Zusammenfassung der Schadsymptome Andere Holzarten Eiche Esche Lärche Sonstige Schäden im Wurzelbereich Tanne Fichte Buche Zusammenfassung Waldsterben weltweit Europa Nordamerika Asien Zwischenbilanz und Ausblick Glossar Register
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 3
    Monograph available for loan
    Monograph available for loan
    Water-rock interaction in a hot dry rock system (1989)
    Commission of the European Communities
    Details Availability
    Call number: M 09.0265/2.Ex. ; M 09.0265/1.Ex.
    Type of Medium: Monograph available for loan
    Pages: 44 S. : Ill., graph. Darst.
    Series Statement: Euratom publications - EUR 12915 EN
    Location: Upper compact magazine
    Location: Upper compact magazine
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 4
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    Comparison of theoretical and measured brightness temperature of a soybean canopy (1989)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A model for the brightness temperature of a canopy which is based on the physical characteristics of the vegetation is being developed. This model uses the Peake model to relate the scattering coefficient of the vegetation to its radiometric brightness temperature and a discrete scattering model to computer the scattering coefficient. A distorted Born approximation is used to provide a tractable solution to the scattering problem. To verify the theory a comparison has been made with experiments. Radiometric measurements of brightness temperature were made at L- and C-bands over a crop of mature soybeans, along with ground truth measurements. All model input parameters were measured; there were no free parameters to adjust to obtain agreement with the measurements. Results showed that agreement between theory and measurements was reasonable for horizontal polarization at both L- and C-bands with dry underlying soil.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Format: text
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  • 5
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    An exact formulation of coupled-mode theory for coupled-cavity lasers (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Coupled-mode rate equations for coupled-cavity lasers are derived using a novel approach. The method, based on the Mittag-Leffler theorem, is exact. The coupling coefficients are compared to those derived by several different approximations.
    Keywords: LASERS AND MASERS
    Type: IEEE Journal of Quantum Electronics (ISSN 0018-9197); QE-24; 66-72
    Format: text
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  • 6
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    High-power low-threshold graded-index separate confinement heterostructure AlGaAs single quantum well lasers on Si substrates (1989)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A high-power low-threshold graded-index separate confinement heterostructure AlGaAs single quantum well laser on Si substrates has been demonstrated for the first time by a hybrid growth of migration-enhanced molecular beam epitaxy followed by metalorganic vapor phase epitaxy. The quantum well laser showed an output power of more than 400 mW per facet under pulsed conditions. A room-temperature threshold current of 300 mA was obtained with a differential quantum efficiency of 40 percent without facet coating. The threshold current density was 550 A/sq cm for a cavity length of 500 microns. These results show the highest peak power reported to date for low-threshold lasers on Si substrates. The full width at half maximum of the far-field pattern parallel to the junction was 6 deg. Threshold current densities as low as 250 A/sq cm were obtained for lasers on GaAs substrates.
    Keywords: LASERS AND MASERS
    Type: Applied Physics Letters (ISSN 0003-6951); 55; 1492-149
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  • 7
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    High-peak-power low-threshold AlGaAs/GaAs stripe laser diodes on Si substrates grown by migration-enhanced molecular beam epitaxy (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A high-peak-power low-threshold AlGaAs/GaAs double-heterostructure stripe laser diode on Si substrats, grown by hybrid migration-enhanced molecular beam epitaxy (MEMBE) and metalorganic chemical vapor deposition (MOCVD) has been demonstrated for the first time. These devices showed the highest peak powers of up to 184 mW per facet reported so far for double-heterostructure stripe laser diodes on Si substrates, room-temperature pulsed threshold currents as low as 150 mA, and differential quantum efficiencies as high as 30 percent without mirror facet coating. An intrinsic threshold current density has been estimated to be about 2 kA/sq cm when taking current spreading and lateral diffusion effects into account. Low dislocation density shows that MEMBE can be a useful method to grow high-quality GaAs and AlGaAs/GaAs layers on Si substrates by combining with MOCVD.
    Keywords: LASERS AND MASERS
    Type: Applied Physics Letters (ISSN 0003-6951); 53; 1248-125
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  • 8
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    Narrow far fields from extended-window broad-area lasers (1988)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Description: Broad-area lasers are fabricated with a long (80-100 microns), nonabsorbing window at each end. The window is shown to dramatically improve the spatial mode properties, stabilizing and smoothing the near field, and reducing the far field from 5-15 deg to as low as 2 deg. This improvement comes at the expense of an increase in threshold current and a reduction of quantum efficiency.
    Keywords: LASERS AND MASERS
    Type: Applied Physics Letters (ISSN 0003-6951); 53; 1372-137
    Format: text
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  • 9
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    Preliminary spectral and geologic analysis of Landsat-4 Thematic Mapper data, Wind River Basin area, Wyoming (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A Landsat-4 Thematic Mapper (TM) image of the Wind River Basin area in Wyoming is currently under analysis for stratigraphic and structural mapping and for assessment of spectral and spatial characteristics using visible, near infrared, and short wavelength infrared bands. To estimate the equivalent Lambertian surface reflectance, TM radiance data were calibrated to remove atmospheric and instrumental effects. Reflectance measurements for homogeneous natural and cultural targets were acquired about one year after data acquisition. Calibration data obtained during the analysis were used to calculate new gains and offsets to improve scanner response for earth science applications. It is shown that the principal component images calculated from the TM data were the result of linear transformations of ground reflectance. In images prepared from this transform, the separation of spectral classes was independent of systematic atmospheric and instrumental factors. Several examples of the processed images are provided.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: IEEE Transactions on Geoscience and Remote Sensing (ISSN 0196-2892); GE-23; 562-573
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  • 10
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    High resolution FTIR spectroscopy of the ClO radical (1988)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The chlorine monoxide radical, ClO, plays a significant role in the catalytic destruction of ozone in the Earth's stratosphere. Because of its atmospheric importance, ClO has been the subject of numerous observational attempts. In order to deduce ClO concentrations from stratospheric infrared measurements, the infrared spectroscopy of ClO must be well characterized. Approximately 830 individual lines were measured form ClO imfrared spectra with the ClO concentration between 1 x 10 to the 13th power and 6 x 10 to the 13th power molecules per cu cu. The lines were then averaged and fit to a function of m (where m = O, -J or J+1 for the Q,P and R branches respectively) to obtain the band strength, S sub v and the first Herman-Wallis coefficient, alpha. The total S sub v for the two main isotopmers was 13.11 plus or minus 1 cm(-2) atm(-1) while alpha was 0.00412 plus or minus .00062.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA, Goddard Space Flight Center, Polar Ozone Workshop. Abstracts; p 273-274
    Format: application/pdf
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