Now showing items 1-20 of 3084

    • X‐ray diffraction approach to grain boundary and volume diffusion 

      Unnam, Jalaiah; Carpenter, Joseph A.; Houska, Charles R. (American Institute of Physics, 1973)
      A generalized two‐dimensional diffusionmodel has been developed which consists of an array of boundaries coupled to the free surface and to the substrate lattice. The model makes use of three nonlinear partial differential ...
    • A Complete Horizontal Microlanguage 

      Wesselkamper, Thomas C.; Nixon, Eric (Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73002-R
      This paper defines a data space whose points are trees with leaves which are [name,value] pairs. Over this space a substitution operator S (meaning informally "in x for y put z") is formally defined. Taken together with ...
    • Lpl: A Generalized List Processing Language 

      Claybrook, Billy G. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73009-R
      The paper describes LFL, a generalized list processing language. LFL allows the user to define multiple cell structures and cell sizes at runtime, thereby allowing nonhomogeneous list structures. The paper examines the ...
    • Generalized Structured Programming 

      Martin, Johannes J. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73003-R
      In an effort to eliminate some inconveniences connected with Dijkstra's method of Structured Programming, a generalized set of basic flow graphs for structuring programs is suggested. These structures generate the set of ...
    • Functionally Complete Machines 

      Wesselkamper, Thomas C. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73005-R
      This paper defines a functionally complete machine as a machine which is capable of evaluating every two place function over its data space. Necessary conditions on memory size for completeness are developed. These conditions ...
    • Dynamic Quantum Allocation and Swap-Time Variability in Time-Sharing Operating Systems 

      Bhat, U. Narayan; Nance, Richard E. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73001-R
      No abstract available.
    • The Dynamic Creation And Modification of Heuristics in a Learning Program 

      Claybrook, Billy G.; Nance, Richard E. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73007-R
      POLY FACT is a learning program that attempts to factor multivariable polynomials. The program has been successful in factoring polynomials (in simplified form) with a maximum of 84 terms, each term consisting of as many ...
    • Fol: A Language for Implementing File Organizations for Information Storage And Retrieval Systems 

      Claybrook, Billy G. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73008-R
      The language FOL is described. FOL facilitates the implementation of file organizations for IS & R systems. FOL is implemented in a list processing language LPL. Files in FOL are interepreted as a list of records, where ...
    • Microprogrammable Cellular Automata 

      Muzio, Jon C.; Wesselkamper, Thomas C. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73006-R
      This paper reports research into cellular automata with two binary inputs, two binary outputs, and an octal control variable. A set of control variables is chosen and it is shown that any function of three variables can ...
    • A Topological Model of the Data Space for a Block Structured Language 

      Wesselkamper, Thomas C. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73004-R
      A space X is defined, the points of which are trees which possess a unique name property. A topology is defined for X based upon partial order. The topology is shown to be reasonably natural relative to the rationals. The ...
    • Transverse vibrations of double-tapered cantilever beams with end support and with end mass 

      Mabie, Hamilton H.; Rogers, C. B. (Acoustical Society of America, 1974)
      The free vibrations of a double-tapered cantilever beam with (1) end support and (2) end mass have been investigated using the Bernoulli-Euler equation. The beam was tapered linearly in the horizontal and in the vertical ...
    • Parallel_plate waveguide with sinusoidally perturbed boundaries 

      Nayfeh, Ali H.; Asfar, Omar R. (American Institute of Physics, 1974)
      The method of multiple scales is used to obtain a uniformly valid asymptotic expansion for the propagation of TM modes on a parallel_plate waveguide with perfectly conducting boundary surfaces that are sinusoidally perturbed ...
    • Nonlinear analysis of the forced response of structural elements 

      Nayfeh, Ali H.; Mook, Dean T.; Sridhar, Seshadri (Acoustical Society of America, 1974)
      A general procedure is presented for the nonlinear analysis of the forced response of structural elements to harmonic excitations. Internal resonances (i.e., modal interactions) are taken into account. All excitations are ...
    • Algebraically growing waves in ducts with sheared mean flow 

      Nayfeh, Ali H.; Telionis, Demetri P. (Acoustical Society of America, 1974)
      Standing or traveling waves which vary algebraically with the axial distance in uniform ducts with sheared mean velocity profiles are investigated. The results show that such waves are not possible for ducts with uniform ...
    • Sound waves in two-dimensional ducts with sinusoidal walls 

      Nayfeh, Ali H. (Acoustical Society of America, 1974)
      The method of multiple scales is used to analyze the wave propagation in two-dimensional hard-walled ducts with sinusoidal walls. For traveling waves,resonance occurs whenever the wall wavenumber is equal to the difference ...
    • Nonlinear acoustic propagation in two-dimensional ducts 

      Nayfeh, Ali H.; Tsai, Ming-Shing (Acoustical Society of America, 1974)
      The method of multiple scales is used to obtain a second-order uniformly valid expansion for the nonlinear acoustic wave propagation in a two-dimensional duct whose walls are treated with a nonlinear acoustic material. The ...
    • A DOS-M Primer 

      Cline, Ben E. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74006-R
      No abstract available.
    • GLM Versus Continuous Approximation for Convex Integer Programs 

      Greenberg, Harvey J. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74022-R
      GLM is compared to continuous approximation for convex, integer programs. After noting the stronger bound provided by GLM, Lagrangian duality and a gap closing heuristic is used to demonstrate how GLM may provide a better ...
    • Root-heavy Directory Tree on Direct Access Storage Devices 

      Shen, Stewart N.T. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74004-R
      No abstract available.
    • Analysis of an Enumeration Algorithm for Unordered K-partitions of N 

      Kang, Andy N. C.; Kang, C. K. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74009-R
      In many combinatorial problems, the need to compute the number of unrestricted partitions of n or to enumerate over the set of unrestricted partitions of n occurs frequently. Let two positive integers k and n be given, ...