A computer visual-input system was built for the purpose of studying the classification of leukocytes. It consisted of an image dissector camera interfaced directly to a D.E.C. PDP-9 computer; a display of the image field was also provided, using a monitoring scope. The design and hardware arrangement of the system is briefly described, while detailed diagrams of the logic networks are shown in Appendix II. Photomicrographs of neutrophils were used as a pattern set, in a study of the computer classification of cell age and lobularity. Clustering of feature vectors was noted in a two-dimensional measurement space showing that metamyelocyte, banded and segmented cells can be distinguished. A square contour-trace of the neutrophil nuclei was performed and an area operator pre-processed the shape of a nucleus into a curvature function. Peaks in this curvature function, a measure of lobularity, as well as the ratio of the perimeter to square root of nuclear area, a measure of the irregularity in the nuclear boundary, were used as orientation and size-independent features. The area operator was found to be unsuitable for extracting curvature from leukocyte images. In cases of extreme nuclear curvature and nuclear filamentation, the basic formulations of the operator were violated giving an erroneous measure of curvature. The general form of the frequency spectrum of the video signal from the image dissector camera was derived. The signal bandwidth requirements and the camera resolution were found experimentally. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate

No description available.

This thesis is a resource document for computer information that is not presently available as a single unit. It describes most of the commonly available computer peripherals and some not-so-common ones from the micro, mini, and mainframe computer worlds. Physical descriptions, methods of operation, trouble shooting, maintenance, and some schematics and future trends are covered. A few older devices having historical significance are also discussed.By knowing where the computer industry is currently and seeing where it has been hardware-wise, it should be possible to project the direction in which the computer industry is headed. People in the computer profession and people that use computers need to be educated about peripheral devices so that they may make informed decisions on which equipment to acquire and in planning for the future. This thesis should be a valuable aid in this process. The information presented should save time and money during the decision-making process and lead to more effective choices of equipment. / Department of Computer Science

Diagnostic tests are designed to detect and isolate faults in sequential systems. The problem is to evaluate the effectiveness of the design. For stuck faults a diagnostic model can be used. A fault simulation strategy is presented for generating this model. First, definitions, for identifying critical inputs are derived. A definition is a statement of the conditions to sensitize an input. Then a fault free simulation is used to generate a critical value array. A critical path is traced through the sensitized inputs marked in the array using a critical value array tracing algorithm that is developed. This algorithm traces a path back in time, as required for a sequential system, to identify detectable faults for the model.

Approved for public release; distribution is unlimited / Many 3D training simulations employ static, and to some extent, simplistic natural phenomena representation that often leaves much to be desired. Taking advantage of the latest advancements in computer graphics hardware allows modeling dynamic natural phenomena such as clouds. Specifically, utilizing procedural techniques and high-level shading languages, it is possible to produce considerably more realistic simulations. This thesis designed and implemented a visual simulation component, which renders convincing clouds using procedural noise-based texture mapping techniques. Both traditional rendering and shader-enabled rendering supported by the OpenGL Shading Language are utilized. This component has been included in the Delta3d simulation engine and is used to create convincing clouds in outdoor simulations while the performance penalty imposed is considered acceptable. Custom tools have been developed for easy noise texture parameterization and cross-platform compatibility has been demonstrated. / Lieutenant, Hellenic Navy

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. / Microfiche copy available in Archives and Engineering. / Includes bibliographical references. / by Sam M. Goldwasser. / M.S.

Tan Xuesong. / "June 2004." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (p. 247-251). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.

Typescript (photocopy). / Digitized by Kansas Correctional Industries