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  • 1
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    Use of an optical rain gauge in a system of monitoring severe weather phenomena (2018)
    Institute of Physics (IOP)
    Details
    Publication Date: 2018-12-18
    Description: Phenomena of convective origin (tornadoes, squalls, thunderstorms, heavy precipitation, and large hail) occur more often than the other natural phenomena causing huge economic damage. Analysis of weather events in recent years shows that the most dangerous meteorological phenomena in the Russian Federation (40% of total events) are extreme rainfall events (heavy rain, long rain, shower, hail, and thunderstorm). Modern systems for environmental research, monitoring, and prompt detection of severe weather phenomena must contain instruments for precipitation measurement that meet modern requirements for quantity and quality of meteorological information. Liquid precipitation measurements require receiving the following real time information: presence of precipitation, intensity (mm/h), start time and duration of precipitation, and total amount per day (mm). The measuring instrument must determine the type of precipitation (rain, snow, hail/large hail, mixed precipitation) with accu...
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
    Published by Institute of Physics (IOP)
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  • 2
    Electronic Resource
    Electronic Resource
    Collision-Induced intensity of the b1Σg+-a1Δg transition in molecular oxygen: Model calculations for the collision complex O2 + H2 (1994)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 50 (1994), S. 279-292 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ab initio configuration interaction (CI) calculations have been performed for the O2 + H2 complex in a trapezoidlike collision arrangement with C2v symmetry. The potential energy surfaces of the four lowest states of this van der Waals complex (arising from the X3 Σg-, a1 Δg, and b1 Σg+ states of the oxygen moiety), as well as the collision-induced b1 Σg+ - a1 Δg electric dipole transition moment (Mb-a), have been analyzed for different CI expansions, using as a reference determinant the restricted open-shell Hartree-Fock (ROHF) function for the ground state of the complex H2(X1 Σg+) + O2(X3 Σg-). The geometry optimized at the ROHF/6-311G** level was refined by a partial optimization at the CI level scanning the intermolecular distance. The equilibrium distances for the X, a, and b states have been found to be a slightly different in the region 3.02-2.98 Å. The larger binding energy of the b1 Σg+ state (2.96 kJ/mol) in comparison with the a1 Δg (2.1 kJ/mol) and ground X3 Σg- states (1.35 kJ/mol) presumably could be explained as resulting from charge-transfer interactions. A good convergence of the calculated transition moment Mb-a for the larger CI expansions (approximately 50,000 configuration-state functions) has been obtained. The calculated collision-induced intensity of the b1 Σg+-a1 Δg and a1 Δg-X3 Σg- transitions in molecular oxygen are in reasonable agreement with recent experimental data for several foreign gases. © 1994 John Wiley & Sons, Inc.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560500405
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Backscattering method possibilities for precise determination of the oxygen profile in oxide films by the use of the elastic resonance in reaction 16O(4He, 4He)16O at 3.045 MeV of 4HePaper presented at ECASIA 91, 14-18 October 1991, Budapest, Hungary. (1992)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 18 (1992), S. 585-588 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Elastic resonant backscattering can be used as a highly sensitive probe for the measurement of oxygen concentration for different oxides. This method of near-surface analysis is absolute, non-destructive and does not need calibration with the aid of standard samples. Our experimental results concern the investigation of the method possibilities for very precise determination of the concentration profile of oxygen for thin monocrystalline films of high-temperature superconducting materials. An accuracy of better than 1.5 relative per cent (rel.%) for a 30 nm depth resolution and 0.6 rel.% for total oxygen content determination has been reached, which is an uncommon level of precision for the backscattering method. Our results are important for those application in which oxygen profiling is essential.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740180803
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    Paper (German National Licenses)
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