A finite element head injury model. Volume II: computer program documentation. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Computer simulation of human thoracic skeletal response - volume II, THORAX programmer's and user's manual. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Revision of Simulation Model of Automobile Collisions (SMAC) computer program: investigation of new integration algorithm. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Operational hybrid computer simulation for vehicle handling studies. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

A user's manual for the CALINE-2 computer program. Interim report.

Mode of access: Internet.

An automatic verifier for a class of sorting programs /

Thesis--University of Illinois at Urbana-Champaign.

Data dependence in ordinary programs /

Thesis (M. S.)--University of Illinois at Urbana-Champaign.

Computer algorithm to calculate longshore energy flux and wave direction from a two pressure sensor array /

"August 1982."

Computer program to perform Fourier analysis of x-ray data /

"U.S. Atomic Energy Commission Contract AT(29-1)-1106."

DRFXR.1: a Fortran computer program to calculate crystallographic D-spacings and Bragg angles /

"U.S. Atomic Energy Commission Contract AT(29-1)-1106."

NBS minimal BASIC test programs : version 2, user's manual /

Item 247

FORTRAN source inventory and renumbering : Hydrologic Engineering Center computer program 72-J2-L205.

At head of cover title: Generalized computer program.

Backwater computations, any cross section : Hydrologic Engineering Center computer program 22-J2-L212.

At head of cover title: Generalized computer programs.

Computer-aided-design of saturated magnetic lenses for electron microscopes

In the last few years, there has been considerable interest in using saturated magnetic objective lenses in high resolution electron microscopes. Such lenses, in present commercial electron microscopes, are energized either by conventional or superconducting coils. Very little work, however, has been reported on the use of conventional coils in saturated magnetic electron lenses. The present investigation has been concerned with the design of high flux density saturated objective lenses of both single and double polepiece types which may be energized by conventional coils and in some cases by superconducting coils. Such coils have the advantage of being small and capable of carrying high current densities. The present work has been carried out with the aid of several computer programs based on the finite element method. The effect of the shape and position of the energizing coil on the electron optical parameter has been investigated. Electron optical properties such as chromatic and spherical aberration have been studies in detail for saturated single and double polepiece lenses. Several high flux density coils of different shapes have been investigated. The choice of the most favourable coil shape and position subject to the operational requirements, has been studied in some detail. The focal properties of such optimised lenses have been computed and compared.

Computer aided design and manufacture for three dimensional milling

Advances in both computer technology and the necessary mathematical models capable of capturing the geometry of arbitarily shaped objects has led to the development in this thesis of a surface generation package called 'IBSCURF' aimed at providing a more economically viable solution to free-form surface manufacture. A suit of computer programs written in FORTRAN 77 has been developed to provide computer aids for every aspect of work in designing and machining free-form surfaces. A vector-valued parametric method was used for shape description and a lofting technique employed for the construction of the surface. The development of the package 'IBSCURF' consists of two phases. The first deals with CAD. The design process commences in defining the cross-sections which are represented by uniform B-spline curves as approximations to give polygons. The order of the curve and the position and number of the polygon vertices can be used as parameters for the modification to achieve the required curves. When the definitions of the sectional curves is complete, the surface is interpolated over them by cubic cardinal splines. To use the CAD function of the package to design a mould for a plastic handle, a mathematical model was developed. To facilitate the integration of design and machining using the mathematical representation of the surface, the second phase of the package is concerned with CAM which enables the generation of tool offset positions for ball-nosed cutters and a general post-processor has been developed which automatically generates NC tape programs for any CNC milling machine. The two phases of these programs have been successfully implemented, as a CAD/CAM package for free-form surfaces on the VAX 11/750 super-minicomputer with graphics facilities for displaying drawings interactively on the terminal screen. The development of this package has been beneficial in all aspects of design and machining of free form surfaces.