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Computer simulation of electron beams. I. Space charge algorithm for asymmetric beams
(American Institute of Physics, 1985)
Longitudinal space_charge forces can be neglected in computer simulations of slowly curving quasilaminar electron beams. A particle mesh type algorithm for transverse space charge forces is developed, and great simplification ...
On the uniqueness of solution of magnetostatic vector_potential problems by three-dimensional finite-element methods
(American Institute of Physics, 1982)
In this paper, particular attention is paid to the impact of finite_element approximation on uniqueness and to approximations implicit in finite element formulations from the uniqueness requirements standpoint. It is also ...
Performance Of A Hybrid Bistable Device Using an Acoustooptic Modulator
(Optical Society of America, 1989-08-01)
Previous studies on acoustooptic hybrid bistable devices have been limited to the Bragg regime involving two diffracted orders, and no comparisons have been made between experimental results and theoretical predictions. ...
A Bidirectional Traveling Plane-Wave Representation Of Exact-Solutions Of The Scalar Wave-Equation
(AIP Publishing, 1989-06-01)
A new decomposition of exact solutions to the scalar wave equation into bidirectional, forward and backward, traveling plane wave solutions is described. The resulting representation is a natural basis for synthesizing ...
Faculty Computer Literacy Project Final Report
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1984), CS84013-R
The emergence of computing as one of the fundamental disciplines threatens to overwhelm our future leaders unless some actions are taken immediately to provide a measure of literacy in the field to the student population ...
Rheological Properties Of Copolyester Liquid-Crystalline Melts .1. Capillary Rheometry
(AIP Publishing, 1981)
Rheological properties of two copolyesters which exhibit liquid crystalline behavior in the melt state were determined using an Instron capillary rheometer. The two polymer melts with nematic liquid crystalline order ...
Dissipative Waves in Fluids Having Both Positive and Negative Nonlinearity
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1986), TR-86-39
The present study examines weakly dissipative, weakly nonlinear waves in which the fundamental derivative changes sign. The undisturbed state is taken to be at rest, uniform and in the vicinity of the 0 locus. The cubic ...
Solving Galerkin Approximations to Nonlinear Two-Point Boundary Value Problems by a Globally Convergent Homotopy Method
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1986), TR-86-27
The Chow-Yorke algorithm, i.e., a homotopy method that has been proved globally convergent j problems, certain classes of zero finding and nonlinear programming problems, and two-point, boundary based on shooting, finite ...
Spatial Reasoning in Remotely Sensed Data
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1981), CS81014-R
Photointerpreters employ a variety of implicit spatial models to provide interpretations from remotely sensed aerial or satellite imagery. The process of making the implicit models explicit and the subsequent use of ...
A Revised Stoneman for Distributed ADA Support Environments
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1983), CS83010-R
This paper extends the conceptual model of the "STONEMAN" document to more completely model the interfaces and protocols that exist in the Ada Programming Support Environment (APSE). A previous extension to the STONEMAN ...