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International Telemetering Conference Proceedings / October 26-29, 1992 / Town and Country Hotel and Convention Center, San Diego, California / As the repetitive processes in the manufacturing community are being automated to reduce operating cost, the satellite tracking station (being for the most part a repetitive operation) can also reduce operating cost by automation. A conventional satellite tracking station requires personnel to setup, monitor, and adjust a variety of equipment, coordinate data collection, and archive collected data. By automating, the above duties in addition to managing the station can be done through a single-point user interface. This paper presents the methods used to design the user-interface software including graphical user interface (GUI) types of hardware I/O for data acquisition and control, and remote control.

The finite element process is now used almost routinely as a tool of engineering analysis. From early days, a significant effort has been devoted to developing simple, cost effective elements which adequately fulfill accuracy requirements. In this thesis we describe the development and application of one of the simplest elements available for the statics and dynamics of axisymmetric shells . A semi analytic truncated cone stiffness element has been formulated and implemented in a computer code: it has two nodes with five degrees of freedom at each node, circumferential variations in displacement field are described in terms of trigonometric series, transverse shear is accommodated by means of a penalty function and rotary inertia is allowed for. The element has been tested in a variety of applications in the statics and dynamics of axisymmetric shells subjected to a variety of boundary conditions. Good results have been obtained for thin and thick shell cases .

Computational human models have become essential in several different biomedical and electrical engineering research areas. They enable scientists to study, model, and solve complex problems of human body responses to various external stimuli including electromagnetic and radio-frequency signals. This study describes the algorithms and procedures of creating multi-tissue full-body Computer-Aided Design (CAD) human models. An emphasis is made on full-body shells of variable thicknesses, e.g. skin, fat, and average body container shells. Such shells, along with internal organs, are useful for multiple high- and low-frequency simulations in a variety of applications. Along with the creation of full-body models, an automatic algorithm to selectively decimate the meshes based on average surface curvature is developed. The algorithm will significantly reduce model size while keeping the same interpolation accuracy.

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Thesis (Ph. D.)--California Institute of Technology, 1993. UM #93-25,365. / Advisor names found in the Acknowledgments pages of the thesis. Title from home page. Viewed 01/22/2010. Includes bibliographical references.

This thesis investigates the design of masonry shell structures. Design is understood to involve two main processes; the first one is the specification of shape, form, and thickness, and the second is the justification of such choices through the analysis of its behaviour. The thesis is therefore introduced by an extensive literature review of, first of all, the relevant material properties, such as strength, stiffness, anisotropy, and bi-axial stress states, as well as of some interesting construction techniques, based on minimal or no formworkthe premise being that the contemporary adoption, or otherwise, of masonry shells as a feasible structural solution depends on the "economics" of the construction process. The analysis of the strength of masonry arches and shells is reviewed extensively, with considerable emphasis given to the validity of the application of limit analysis to masonry shells, in view of the presence of finite friction. Techniques for the form-finding of shells and for the optimisation of such forms, are then studied, and a finite-element technique developed for the finding of membrane thrust surfaces for shells incapable of carrying tension (as well as having possibly orthotropic properties). The technique is based on the solution of the partial differential equation relating shape, stress and loading, given a specific loading regime, and specific boundary conditions. The stress distribution, satisfying the given boundary and material conditions, is obtained, not on the basis of a trial-and-error approach, as is often the case, but on a plane stress analysis of the horizontal projection of the shell. The resultant shape hence automatically satisfies the boundary conditions. Various examples of the results of such method are given.

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