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  • 1
    Electronic Resource
    Electronic Resource
    Sintered Ternary Films (1997)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 55 (Aug. 1997), p. 186-191 
    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/2011/0528/02/25/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.55.186.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Groundwater in a coral island (1999)
    Springer
    Environmental geology 37 (1999), S. 72-77 
    Details
    ISSN: 1432-0495
    Keywords: Key words Island ; Water table ; Tidal effect ; Abstraction ; Seawater intrusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Freshwater aquifers in small coral islands usually occur as thin lenses which are significantly influenced by stresses such as groundwater pumping, sea tides, etc. Kavaratti, a coral island, is one of the 36 such islands in the Arabian Sea off the western coast of India. Detailed hydrogeological investigations were carried out to determine the quantity of freshwater that could be pumped in addition to the present usage. Salinity of groundwater must remain within permissible limits and a 2-D solute mass transport model with a vertical section of the island was constructed by the computer code SUTRA. The model was calibrated by obtaining a match of computed and observed values of the water table, tidal efficiency, and salinity of groundwater at the water table. The model analysis showed that the salinity of groundwater continues to increase unless groundwater pumping is kept below a certain rate. Groundwater potential can be augmented by reducing the subsurface outflow to the sea and by raising the water table by a subsurface dam.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050362
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  • 3
    Electronic Resource
    Electronic Resource
    Hydrogeology of limited aquifer in a granitic terrain (1999)
    Springer
    Environmental geology 37 (1999), S. 90-95 
    Details
    ISSN: 1432-0495
    Keywords: Key words Hydrogeology ; Hard rock aquifers ; Aquifer parameters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Detailed hydrogeological studies in a granitic micro-watershed have been carried out to determine the extent, behavior, and characteristics of the aquifer. The study includes analysis of lithologs, drill time log, pumping tests, and slug tests. Realistic field conditions have been taken into account for characterizing the aquifer system. Slug tests were carried out to estimate aquifer parameters at the wells which could not sustain pumping.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050364
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  • 4
    Electronic Resource
    Electronic Resource
    Interpretation of pumping test data from large diameter wells on an oceanic island (1999)
    Springer
    Environmental geology 38 (1999), S. 168-170 
    Details
    ISSN: 1432-0495
    Keywords: Key words Aquifer parameters ; Large diameter wells ; Island aquifer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Estimation of aquifer parameters is vital for the assessment of groundwater potential and groundwater flow regime. On an oceanic island where fresh water lens is fragile and sensitive to various stresses, it is even more essential that in order to assess the potential of fresh water lens and the effect of various stresses on the fresh groundwater regime the parameters should be representative to the field hydrogeological set up. Pumping tests conducted on existing large diameter wells on an oceanic island have been analyzed. A finite difference method has been used to take into account the well storage, partial penetration and upconing effect into the aquifer. Forward modeling has been carried out to estimate aquifer parameters from the pumping test data. Field examples are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050412
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  • 5
    Electronic Resource
    Electronic Resource
    Application of uncertainty analysis to groundwater pollution modeling (1995)
    Springer
    Environmental geology 26 (1995), S. 89-96 
    Details
    ISSN: 1432-0495
    Keywords: Groundwater pollution ; Analytical models ; Uncertainty analysis ; Monte Carlo technique
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Prediction and evaluation of pollution of the subsurface environment and planning remedial actions at existing sites may be useful for siting and designing new land-based waste treatment or disposal facilities. Most models used to make such predictions assume that the system behaves deterministically. A variety of factors, however, introduce uncertainty into the model predictions. The factors include model and pollution transport parameters and geometric uncertainty. The Monte Carlo technique is applied to evaluate the uncertainty, as illustrated by applying three analytical groundwater pollution transport models. The uncertainty analysis provides estimates of statistical reliability in model outputs of pollution concentration and arrival time. Examples are provided that demonstrate: (a) confidence limits around predicted values of concentration and arrival time can be obtained, (b) the selection of probability distributions for input parameters affects the output variables, and (c) the probability distribution of the output variables can be different from that of the input variables, even when all input parameters have the same probability distribution
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00768321
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  • 6
    Electronic Resource
    Electronic Resource
    Evaluation of different zinc sources for lowland rice production (1999)
    Springer
    Biology and fertility of soils 30 (1999), S. 168-172 
    Details
    ISSN: 1432-0789
    Keywords: Key words Rice ; Zinc uptake ; Zinc mobilization ; Panicle-emergence index ; Harvest index
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  ZnSO4, Zn-enriched farmyard manure (Zn-FYM), Zn-tetraammonia complex sorbed on FYM [Zn(NH3)4-FYM] and Zn-ethylenediaminetetraacetate (Zn-EDTA) were compared as Zn sources for rice production under lowland conditions. The amount of Zn supplied by Zn-EDTA was one-tenth of that supplied by the other Zn sources. Zn application to a Zn-deficient soil corrected the visual symptoms of Zn deficiency and significantly increased the total biomass, grain yields and the harvest index of rice, as well as the Zn concentration in the grain and the uptake of Zn by the straw and the grains. Even with lower rates of application (0.25 and 0.5 mg Zn kg–1 soil), Zn-EDTA treatments gave comparable values for these parameters, and the highest "Zn-mobilization efficiency" compared to the other Zn sources. The content of diethylenetriaminepentaacetate (DTPA)-extractable Zn in the soil of the different treatments after the harvest of rice was in the order; ZnSO4=Zn-FYM〉Zn(NH3)4-FYM=Zn-EDTA. The application of Zn also significantly increased the number of panicles that emerged between 80 to 93 days after transplanting, though the total number of panicles at harvest remained unaffected. The calculated panicle-emergence index had a positive correlation with the grain yield of rice. The Zn-EDTA treatment, inspite of supplying the lowest amount of Zn, as well as leading to the lowest rate of Zn uptake, produced the highest yields. Therefore, we concluded Zn-EDTA to be the most efficient source of Zn for lowland rice production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050604
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  • 7
    Electronic Resource
    Electronic Resource
    The O(1S) dayglow emission as observed by the WIND imaging interferometer on the UARS (1996)
    Springer
    Annales geophysicae 14 (1996), S. 637-646 
    Details
    ISSN: 0992-7689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Volume emission rate profiles of the O(1D-1S) 5577 Å dayglow measured by the WIND imaging interferometer on the Upper Atmosphere Research Satellite are analyzed to examine the O(1S) excitation mechanisms in the sunlit lower thermosphere and upper mesosphere. The observed emission profiles are compared with theoretical profiles calculated using a model which takes into account all of the known daytime sources of O(1S). These include photoelectron impact on atomic oxygen, dissociative recombination of O+2, photodissociation of molecular oxygen, energy transfer from metastable N2(A3〈Sigma〉+u) and three body recombination of atomic oxygen. Throughout most of the thermosphere the measured and modelled emission rates are in reasonably good agreement, given the limitations of the model, but in the region below 100 km, where the oxygen atom recombination source is likely to dominate, the measured emission rates are considerably larger than those modelled using the MSIS-90 oxygen atom densities. This discrepancy is discussed in terms of possible inadequacies in the MSIS-90 model atmosphere and/or additional sources of O(1S) at low altitude.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-996-0637-y
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  • 8
    Electronic Resource
    Electronic Resource
    The morphology of oxygen greenline dayglow emission (1998)
    Springer
    Annales geophysicae 16 (1998), S. 1599-1606 
    Details
    ISSN: 0992-7689
    Keywords: Ionosphere (ion chemistry and composition; modeling and forecasting; solar radiation and cosmic ray effects)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract In this study, the morphology of the oxygen greenline dayglow emission is presented. The volume emission rate profiles are obtained by using Solomon’s glow model. The glow model is updated in terms of recent cross sections, reaction rate coefficients and quantum yield of greenline emission. Throughout most of the thermosphere the modelled and observed emission rates are in reasonably good agreement. In the region between 98 and 120 km, the modelled emission rates are substantially higher (about a factor of 1.7) than the observed emission rates. This discrepancy is discussed in terms of scaling of solar fluxes which accounts the variation of solar activity for the day on which calculations are made. The modelled morphology of greenline emission is compared with those cases where WINDII data is available. The modelled and observed morphology is in reasonably good agreement at most of the latitudes above 120 km. In the mesosphere the qualitative nature of morphology is very similar to those of WINDII observation except the modelled emission rates are about a factor of 1.7 higher than the observed emission rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-998-1599-z
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  • 9
    Electronic Resource
    Electronic Resource
    Analysis of Symmetric Triple Junctions (1996)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 207-209 (Feb. 1996), p. 257-260 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/01/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.207-209.257.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Analysis of contact degradation at the CdTe-electrode interface in thin film CdTe-CdS solar cells (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 4538-4542 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Atmospheric degradation of unencapsulated CdS-CdTe solar cells was modeled by assuming that the initial CdTe/electrode interface becomes a metal/insulator/semiconductor junction as oxygen diffuses through the metal to form a CdTeO3 insulating layer. The doping concentration, barrier height, and oxide thickness were varied and the numerical calculations were compared with the experimental data on cells aged in a humidity chamber. The degradation was most severe when the cells were exposed to high humidity and high temperature. This degradation could be modeled in terms of the growth of the insulating CdTeO3 layer from 20 A(ring) to 80 A(ring). © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359796
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