Now showing items 21-40 of 767

    • uniqueness of solutions to linearized Boltzmann equation 

      Garbanati, L. F.; Greenberg, W.; Zweifel, P. F. (AIP Publishing, 1978-01)
      Uniqueness theorems are proved for the linearized Boltzmann equation for both the ’’exterior’’ and ’’interior’’ problems under generalized Maxwellboundary conditions. The solution space is a weighted L p space, and agrees ...
    • Transmission-electron spin resonance in dilute CuFe alloys 

      Ritter, A. L.; Silsbee, R. H. (American Physical Society, 1978-04)
      Alloys of Cu with nominally 5- and 10-at. ppm Fe were studied by transmission-electron spin resonance (TESR) in the temperature range 2-40 K. The samples were strained in order to remove background signals which hamper ...
    • volume holograms constructed from computer-generated masks 

      Case, S. K.; Dallas, W. J. (Optical Society of America, 1978-05)
      A new type of hologram that combines computer-generated holograms with volume holograms is described. This hologram allows arbitrary selection of the location and color of a computer-generated image when white light ...
    • Bohm-Aharonov experiment without an electron microscope 

      Li, M. C. (American Physical Society, 1978-08)
      A new-type Bohm-Aharonov experiment is proposed. The experiment can be carried out in a large scale without the help of an electron microscope.
    • Configuration fluctuations and the dilute-magnetic-alloy problem 

      Bowen, S. P. (American Physical Society, 1978-10)
      A new theoretical treatment of the Anderson model of transition-metal or rare-earth impurities in a simple metal is presented. This study treats the impurity Coulomb correlation exactly and the host impurity coupling to ...
    • transverse plasma oscillations 

      Arthur, M. D.; Greenberg, W.; Zweifel, P. F. (AIP Publishing, 1979)
      An operator theoretic approach is used to solve the linearized Vlasov–Maxwell equations for transverse plasma oscillations. In particular, the special cases of simple and second‐order real zeros of the plasma dispersion ...
    • Fourier-transform differences and averaged similarities in diatoms 

      Almeida, S. P.; Fujii, H. (Optical Society of America, 1979)
      Phase contrast photographs of diatoms are characterized from their Fourier transform taken through an optical diffractometer. The system output is placed on line to a PDP11/40 providing digital subtraction of two output ...
    • A note on the iteration of the Chandrasekhar non-linear H-equation 

      Bowden, Robert L. (AIP Publishing, 1979-04)
      An iteration scheme to solve the Chandrasekhar H equation in the form H (_) ={1___F_ 1 0[_ (s) H (s)]/(s +_) d s}_1 is shown to converge monotonically and uniformly.
    • resolvent integration techniques for generalized transport equations 

      Bowden, Robert L.; Greenberg, W.; Zweifel, P. F. (AIP Publishing, 1979-06)
      A generalized class of ’’transport type’’ equations is studied, including most of the known exactly solvable models; in particular, the transport operator K is a scalar type spectral operator. A spectral resolution for K ...
    • multispectral size-averaged incoherent spatial-filtering 

      Almeida, S. P.; Case, S. K.; Dallas, W. J. (Optical Society of America, 1979-08)
      A method of 2-D size-averaged incoherent recognition filtering is described. White light input illumination is used to multiplex chromatically a continuum of inputs differing in their spatial Fourier spectral magnifications. ...
    • pattern-recognition with wavelength-multiplexed filters 

      Case, S. K. (Optical Society of America, 1979-08)
      Wavelength-multiplexed matched spatial filters are used in an incoherent optical pattern recognition system. The system produces color-coded correlation responses which allow the simultaneous recognition of several objects ...
    • color coding of spatial-frequencies using incoherent optical-processing 

      Indebetouw, G. (Optical Society of America, 1979-10)
      An incoherent optical processing technique for color coding the spatial frequency content of an input is described. Experimental results and comparison with the output of a coherent filtering system are discussed. Possible ...
    • analysis of the dispersion function for anisotropic longitudinal plasma-waves 

      Arthur, M. D.; Bowden, Robert L.; Zweifel, P. F. (AIP Publishing, 1979-10)
      An analysis of the zeros of the dispersion function for longitudinal plasma waves is made. In particular, the plasma equilibriumdistribution function is assumed to have two relative maxima and is not necessarily an even ...
    • coherent spatial-filtering with simulated input 

      Fujii, H.; Almeida, S. P. (Optical Society of America, 1979-11)
      A disadvantage of a well-tuned matched filter is partly overcome in recognizing biological species, i.e., algae. A simplified input pattern is prepared which simulates a given species. The matched spatial filter for this ...
    • rotational matched spatial filter for biological pattern-recognition 

      Fujii, H.; Almeida, S. P.; Dowling, J. E. (Optical Society of America, 1980-06)
      Randomly oriented microbiological patterns are recognized by rotating a matched spatial filter with an optical wedge prism. The filter is made from a composite input pattern with various sized objects to cover wider ranges ...
    • tunable spatial-filtering with a Fabry-Perot etalon 

      Indebetouw, G. (Optical Society of America, 1980-08)
      A Fabry-Perot etalon is used in the image plane as a means of selecting arbitrary directions of propagation in the angular spectrum of an object. This provides a simple widely tunable spatial filter that could be useful ...
    • resonance fringes in the two-photon absorption with a doppler-shift 

      Li, M. C. (American Physical Society, 1980-09)
      The two-photon absorption initiated by two coherent beams is considered. It is shown that the resonance fringe variation, which appeared in the Doppler-free two-photon absorption of pulsed laser beams, can also be observed ...
    • separated-beam experiments and transit-time broadening 

      Li, M. C. (American Physical Society, 1981-06)
      Separated-beam experiments for both the Doppler-free two-photon and saturated absorptions are under consideration. In the Doppler-free two-photon absorption, the experimental arrangement is important. Such important has ...
    • Fluid-magnet universality: Renormalization-group analysis of φ5 operators 

      Nicoll, J. F.; Zia, R. K. P. (American Physical Society, 1981-06)
      The question of a possible difference between the universality classes of fluids and Ising-like magnets is addressed by perturbation theory and the renormalization group. The most dangerous possibility is that of an φ5 ...
    • Fabry-Perot filters used for optical preprocessing 

      Indebetouw, G.; Case, S. K. (Optical Society of America, 1981-10)
      A Fabry-Perot etalon placed in the object plane of a coherent optical processing system can be used as a variable bandpass preprocessing filter. Use of this filter leads to improved correlation signals in a matched spatial ...