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  • 78.47. + p  (1)
  • CAD/CAM  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Dynamics in condensed molecular systems studied by incoherent light (1996)
    Springer
    Applied physics 63 (1996), S. 209-223 
    Details
    ISSN: 1432-0649
    Keywords: 42.65.Dr ; 78.47. + p ; 42.50.Md ; 33.70.Jg
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Applications of incoherent light techniques to time-resolved studies in condensed matter are reviewed. Vibrational dephasing ofβ-carotene and a heptamethine dye was studied by interferometric coherent anti-Stokes Raman scattering in solution revealing dephasing times between 300 fs and 1.1 ps. This technique gives results that are analogos to spectral methods, but vibrational frequencies can be determined more precisely. Electronic dephasing was studied for a variety of dyes. Forced light scattering is used to measure the initial evolution of the lineshape functiong(t) up to about 50 fs. In the lowest order approximation,g(t) =Δ 2 t 2 /2,, the dephasing is characterized by a modulation strengthΔ = 25 to 150 THz depending on the dye, the solvent and its temperature, and the pump laser wavelength. Interestingly, the modulation decreases for heptamethine in the long-wavelength tail of the absorption band. Brillouin scattering gives rise to finite dephasing times of neat solvents in forced light scattering.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01833789
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A CAD/CAM system for the machining of precision cams using a half angle search algorithm (1998)
    Springer
    The international journal of advanced manufacturing technology 14 (1998), S. 180-184 
    Details
    ISSN: 1433-3015
    Keywords: CAD/CAM ; Cams ; CNC machining ; Interpolation method ; NC program
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper describes a computer-aided design and manufacturing system for design and production of complex cam profiles within the specified tolerance using a half angle search algorithm developed for optimisation of CNC part programming of cam profiles. The algorithm provides a systematic searching method to determine the minimum number of NC points required for machining the specified profiles of plate cams within a user-specified tolerance. Based on this algorithm, the CAD/CAM system generates an accurate and economical CNC part program for cams. This is verified by experimental results, analysis from CAD system and comparison with results from other methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01188413
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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