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  • 2000-2004  (4)
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Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Optimal control of particle motion by means of a random force (2000)
    Springer
    Technical physics letters 26 (2000), S. 526-527 
    Details
    ISSN: 1090-6533
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The overdamped motion of a particle controlled by a time-correlated random force in a spatially periodic potential is studied theoretically. The correlation time of the force is essentially assumed to be much greater than the time required for the particle to traverse one period of the potential. It is demonstrated that a bimodal distribution of the force optimizes the control for power demand.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1262899
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Systems of reaction diffusion equations and their symmetry properties (2001)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 42 (2001), S. 1666-1688 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: A constructive algorithm is proposed for the investigation of symmetries of partial differential equations. The algorithm is used to present classical Lie symmetries of systems of two nonlinear reaction diffusion equations. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1331318
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  • 3
    Electronic Resource
    Electronic Resource
    Biocomposite Calcium-Phosphate Materials Used in Osteoplastic Surgery (2000)
    Springer
    Glass and ceramics 57 (2000), S. 322-325 
    Details
    ISSN: 1573-8515
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An osteoconductive biocomposite BAK-1000 is developed, which consists of hydroxyapatite and a silicate matrix similar in its chemical composition to sodium-calcium feldspars. The morphological studies of BAK-1000 biocomposite gave foundations for a conjecture concerning the mechanism of the deposition of collagen, which is the first product of osteogenesis, on the surface of the open pores of the material in a living organism with the formation of strong chemical bonds. Implant sets for maxillofacial surgery and neurosurgery were developed on the basis of BAK-1000 biocomposite and implemented in clinical practice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007182118339
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    X-Ray Photoelectron Study of Thorium Silicate ThSiO4 · nH2O and Uranium Silicate USiO4·nH2O (2000)
    Springer
    Journal of structural chemistry 41 (2000), S. 965-971 
    Details
    ISSN: 1573-8779
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The naturally occurring compounds of thorium ThSiO4, ThSiO4· nH2O, and (Th, Fe)SiO4 and uranium USiO4· nH2O have been studied by X-ray photoelectron spectroscopy in the range of electron binding energies from 0 to 1200 eV. The oxidation state of Th in the natural compounds is close to that in Th(OH)4; for uranium, it is similar to that in UO2. Based on the structure of the low-energy electron spectra it is assumed that the electrons of the filled Th6p- and O2s-atomic orbitals take an active part in chemical bonding. Fine structure was observed in the Th(U)6s-, 5d-, 5p-, 4f-, 4d-, and 4p 3/2 electron spectra of all substances under study. Mechanisms of fine structure formation are discussed and the fine structure parameters are correlated with the physicochemical properties of the compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010302805492
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    Paper (German National Licenses)
    Fulltext
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