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  • 1
    Electronic Resource
    Electronic Resource
    On waves generated by a moving pressure field, II: Cnoidal wave effects (1972)
    Springer
    Pure and applied geophysics 97 (1972), S. 111-126 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary In a recent paperHunt andTanner [3]2) investigated the waves generated by a steadily moving two-dimensional pressure distribution, which was zero ahead of the disturbance and a constantp 0, tehind it, these regions being joined smoothly by a cubic function. Only those solutions with supercritical flow in both regions were considered, these were found to lead to an asymmetric solitary wave. This result is now extended to take account of the possibility of subcritical flow in either or both the regions, that is when there is a cnoidal wave train either behind and or ahead of the main solitary wave crest. The wave profiles are determined by the iterative method employed in the previous paper. This together with the wave drag associated with each system is computed for various values ofp 0/ϱU 2, where ϱ is the fluid density andU a typical velocity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875955
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  • 2
    Electronic Resource
    Electronic Resource
    On solitary waves generated by a moving pressure field (1971)
    Springer
    Pure and applied geophysics 85 (1971), S. 309-323 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Résumé Nous avons calculé les expressions des profils d'ondes solitaires produites par une pression, qui se propagent sur la surface d'une couche d'eau peu profonde avec une vitesseU plus grande que (g h)1/2. La pression appliquée est nulle en avant de l'onde, elle est une constanteP 0 en arrière, et entre ces deux régions elle est representée par une fonction cubique. Les profils sont calculés par une methode iterative déjà employée pour des ondes non-linéaires. L'amplitude, le profil et la force ont été evalués pour diverses valeurs deP 0/Q g h, ouh est la profondeur en avant de l'onde.
    Notes: Summary The waves generated by a steadily moving two-dimensional pressure distribution are examined using non-linear shallow water theory. The applied pressure is zero ahead of the disturbance, that is in the downstream direction, and is a constantP 0 in the upstream direction, these regions being joined smoothly by a cubic function. We consider here only the case of supercritical flow in both regions, the solution representing an asymmetric solitary wave travelling with the disturbance. The wave profiles are determined by an iterative method previously employed for non-linear waves. Wave amplitudes and profiles, and the wave drag, associated with each system are computed for various values ofP 0/Q g h, whereh is the undisturbed depth of water ahead of the wave. The solution obtained reduces to the classical solitary wave of finite amplitude when the applied pressure is everywhere zero.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875418
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  • 3
    Electronic Resource
    Electronic Resource
    Biological nitrogen fixation in faba bean (Vicia faba L.) in the Ethiopian highlands as affected by P fertilization and inoculation (2000)
    Springer
    Biology and fertility of soils 32 (2000), S. 353-359 
    Details
    ISSN: 1432-0789
    Keywords: Keywords Soil nitrogen balance ; Crop rotation ; Seed yield ; Nitrogen-15 isotope dilution technique
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  N2 fixation by leguminous crops is a relatively low-cost alternative to N fertilizer for small-holder farmers in developing countries. N2 fixation in faba bean (Vicia faba L.) as affected by P fertilization (0 and 20 kg P ha–1) and inoculation (uninoculated and inoculated) with Rhizobium leguminosarium biovar viciae (strain S-18) was studied using the 15N isotope dilution method in the southeastern Ethiopian highlands at three sites differing in soil conditions and length of growing period. Nodulation at the late flowering stage was significantly influenced by P and inoculation only at the location exhibiting the lowest soil P and pH levels. The percentage of N derived from the atmosphere ranged from 66 to 74%, 58 to 74% and 62 to 73% with a corresponding total amount of N2 fixed ranging from 169 to 210 kg N ha–1, 139 to 184 kg N ha–1 and 147 to 174 kg N ha–1 at Bekoji, Kulumsa and Asasa, respectively. The total N2 fixed was not significantly affected by P fertilizer or inoculation across all locations, and there was no interaction between the factors. However, at all three locations, N2 fixation was highly positively correlated with the dry matter production and total N yield of faba bean. Soil N balances after faba bean were positive (12–58 kg N ha–1) relative to the highly negative N balances (–9–44 kg N ha–1) following wheat (Triticum aestivum L.), highlighting the importance of rotation with faba bean in the cereal-based cropping systems of Ethiopia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740000258
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  • 4
    Electronic Resource
    Electronic Resource
    Carboniferous tectonics of the Variscan basement collage in eastern Bavaria and western Bohemia (1997)
    Springer
    Geologische Rundschau 86 (1997), S. S15 
    Details
    ISSN: 0016-7835
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  The tectonometamorphic units in the Variscan basement of eastern Bavaria and western Bohemia have a long and complex record of large-scale continental deformation, metamorphism, and syn- and posttectonic magmatism. Although there is a large database describing each of the above-mentioned phenomena, an integrated tectonic synthesis is hard to achieve. In this paper we review some of the prominent effects in the Carboniferous tectonic evolution, which is accountable for much of the deformation, regionally extensive low-pressure/high-temperature metamorphism, and abnormally intense partial anatexis and plutonism. Deformation was multistage and its kinematics were dominated by lateral compression, transpression, and strike-slip shearing. Tectonic units were mostly deformed “en masse”, without operation of large, discrete shear zones. An exception were the boundary zones of those units that had already cooled to sub-greenschist-facies temperatures before the onset of Carboniferous deformation. These boundaries were operated as normal or transtensive faults. The large present vertical thickness of the Zone of Erbendorf-Vohenstrauss at the KTB drill site is most probably due to a combination of Carboniferous block tilting related to the intrusion of the Falkenberg granite, and Cretaceous distributed reverse faulting and imbrication. Late-orogenic plutonism in the Bohemian massif led to the emplacement of at least 176 000 km3 of granitoids. Melt flux through the Moldanubian unit may have been as high as 0.2 km/m.y., allowing the estimated volume of granitoids to be segregated by partial anatexis of the continental crust within a time span of approximately 8.8 million years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00014650
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of Esfenvalerate on the Reproductive Success of the Bluegill Sunfish, Lepomis macrochirus in Littoral Enclosures (1996)
    Springer
    Archives of environmental contamination and toxicology 31 (1996), S. 244-251 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract. Adult bluegills were exposed to the synthetic pyrethroid esfenvalerate, during a reproduction study conducted in six littoral enclosures located in a 2-ha pond near Duluth, Minnesota. Bluegill reproductive success was determined after two applications of esfenvalerate at nominal concentrations of 0.0, 0.01, 0.08, 0.20, 1.0, and 5.0 μg/L. Responses measured were adult behavior and spawning, embryo hatchability, larval survival until swim-up, young-of-the-year (Y-O-Y) growth, and total biomass. All adult bluegills died within one day following the first application at 5.0 μg/L. Successful spawning and resulting hatching of offspring were observed at all esfenvalerate concentrations except 5.0 μg/L. Following exposure at 1.0μg/L, spawning was delayed for 15 days and few or no larvae survived. Bluegill Y-O-Y growth was reduced by 62, 57, and 86% in the 0.08, 0.20, and 1.0 μg/L esfenvalerate treated enclosures. Delayed adult spawning and reduced Y-O-Y growth may result in poor Y-O-Y overwinter survival which would result in a diminished or extirpated year class.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00212373
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  • 6
    Electronic Resource
    Electronic Resource
    Anisotropic optical properties of single-crystal GdBa2Cu3O7−δ (1995)
    Springer
    The European physical journal 96 (1995), S. 313-318 
    Details
    ISSN: 1434-6036
    Keywords: 74.30.Gn ; 74.70.Vy ; 78.30.Er ; 78.65.Ez
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The optical spectrum of reduced-T c GdBa2Cu3O7−δ has been measured for polarizations parallel and perpendicular to theab plane. The sample was an oxygen-deficient single crystal with a large face containing thec axis. The polarized reflectance from this face was measured from 20–300 K in the spectral region from 30–3000 cm−1, with 300 K data to 30000 cm−1. Kramers-Kronig analysis was used to determine the spectral dependence of theab and thec components of the dielectric tensor. The optical properties are strongly anisotropic. Theab-plane response resembles that of other reduced-T c materials whereas thec axis, in contrast, shows only the presence of several phonons. There is a complete absence of charge carrier response alongc aboveand belowT c. This observation allows us to set an upper limit to the free-carrier spectral weight for transport perpendicular to the CuO2 planes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01313052
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  • 7
    Electronic Resource
    Electronic Resource
    a-b plane anisotropy of single-domain crystals of Bi2Sr2CaCu2O8 (1994)
    Springer
    The European physical journal 94 (1994), S. 255-259 
    Details
    ISSN: 1434-6036
    Keywords: 74.30.Gn ; 74.70.Vy ; 78.47.+p ; 84.40.Cb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The polarized reflectance of thea-b plane of single-domain Bi2Sr2CaCu2O8 crystals is anisotropic above and belowT c . The normal-state infrared conductivity is higher forE‖a whereas the high-frequency conductivity is higher alongb, particularly for transitions associated with the Bi−O layers. BelowT c there is a definite anisotropy to the far-infrared absorption, with a finite absorption forE‖b down to ≈20 meV. This anisotropy of thea-b plane could be due either to anisotropy of the superconducting gap or to anisotropy of the midinfrared component to the conductivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01320677
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of esfenvalerate on the reproductive success of the bluegill sunfish, Lepomis macrochirus in littoral enclosures (1996)
    Springer
    Archives of environmental contamination and toxicology 31 (1996), S. 244-251 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Adult bluegills were exposed to the synthetic pyrethroid esfenvalerate, during a reproduction study conducted in six littoral enclosures located in a 2-ha pond near Duluth, Minnesota. Bluegill reproductive success was determined after two applications of esfenvalerate at nominal concentrations of 0.0, 0.01, 0.08, 0.20, 1.0, and 5.0 μg/L. Responses measured were adult behavior and spawning, embryo hatchability, larval survival until swim-up, young-of-the-year (Y-O-Y) growth, and total biomass. All adult bluegills died within one day following the first application at 5.0 μg/L. Successful spawning and resulting hatching of offspring were observed at all esfenvalerate concentrations except 5.0 μg/L. Following exposure at 1.0 μg/L, spawning was delayed for 15 days and few or no larvae survived. Bluegill Y-O-Y growth was reduced by 62, 57, and 86% in the 0.08, 0.20, and 1.0 μg/L esfenvalerate treated enclosures. Delayed adult spawning and reduced Y-O-Y growth may result in poor Y-O-Y overwinter survival which would result in a diminished or extirpated year class.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00212373
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  • 9
    Electronic Resource
    Electronic Resource
    Correction of phase errors in fourier spectroscopy (1983)
    Springer
    International journal of infrared and millimeter waves 4 (1983), S. 273-298 
    Details
    ISSN: 1572-9559
    Keywords: Fourier transform spectroscopy ; phase correction ; interferometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The correction of phase error in Fourier transform spectroscopy is discussed. Phase error is corrected by multiplying the inverse transform of the measured interferogram by e−iϕ(ω), where ϕ(ω) is the phase error in the spectrum. This error is determined from a low-resolution, two-sided interferogram. It is absolutely essential that the truncation-apodization function which multiplies the interferogram have an even part which is symmetric about the x=0 position. If this function is not properly located, large errors in the corrected spectrum can occur.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01008607
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  • 10
    Electronic Resource
    Electronic Resource
    Far infrared study of optical phonons in K1−xRbxI mixed crystals (1986)
    Springer
    International journal of infrared and millimeter waves 7 (1986), S. 1805-1811 
    Details
    ISSN: 1572-9559
    Keywords: DFTS ; mixed alkalai halide ; zone-center optical phonons ; far infrared
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The farinfrared properties of mixed alkalai halide crystals, K1−xRbxI, x=0.25 and 0.50, have been studied at room temperature. Dispersive Fourier transform spectroscopy (DFTS) has been used to obtain the complex dielectric function of these samples. Infrared-active phonon modes are observed at frequencies close to those of KI and RbI. This two-mode behavior is in agreement with theoretical predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01010078
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