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Articles 1171 - 1175 of 1175
Full-Text Articles in Electrical and Computer Engineering
A Loran-C Antenna Coupling Unit., Timothy Andrew Reilly 1963-
A Loran-C Antenna Coupling Unit., Timothy Andrew Reilly 1963-
Electronic Theses and Dissertations
This project is the design of an antenna-coupling unit (ACU) that will operate with the Texas Instruments LORAN-C receiver and a 28-inch antenna. The height of the antenna used at the present is eight feet. Since the application of LORAN-C positioning is being expanded to vehicular location, an eight-foot antenna is not practical. The shorter antenna is necessary to prohibit striking trees, overpasses, etc. The newly designed ACU has more voltage gain to compensate for the attenuation of the incoming signal due to the shortening of the antenna. It also has a bandpass of 90 KHz-110 KHz with the center …
A Master Clock For The Speed School Impulse Clock System Using Wwv Time Information, John E. Pfeifer Jr.
A Master Clock For The Speed School Impulse Clock System Using Wwv Time Information, John E. Pfeifer Jr.
Electronic Theses and Dissertations
Since approximately February of 1979, the Speed School impulse clock system has not functioned due to a worn-out master clock that was never replaced because of a lack of fund. For this thesis project, a solid-state master clock that performs the same functions as the old mechanical master clock was built for less than $200. The new clock features accuracy traceable to the National Bureau of Standards, automatic reset after a power-down and subsequent power-up, and a daylight savings time provision. A decoder that recovers time information broadcast by radio station WWV from Fort Collins, Colorado was built and interfaced …
Application Analysis Of A Cellular Geographic Information System, Michael Edward Wehde
Application Analysis Of A Cellular Geographic Information System, Michael Edward Wehde
Electronic Theses and Dissertations
AREAS, the Area REsource Analysis System, was developed by the author as an analytical tool for resource data manipulation in a spatial context. The data base and processing software design factors relevant to economical application are reviewed. The investigation seeks to define a procedure for selection and justification of the grid cell size used to quantify the spatial domain. The performance of a cellular information system is measured in terms of mapping and inventory accuracy. These measures of performance are evaluated for various cellularizations of a single map. The interboundary distance distribution is justified as the only unique characterization of …
Audio Triamplification System., John James Mccure
Audio Triamplification System., John James Mccure
Electronic Theses and Dissertations
This thesis is for the purpose of determining if active filters are useful as audio crossover networks and in particular if they are better than passive crossover networks. An entire audio reproduction system was constructed with the express design intent of linear operation in two separate modes. These two modes being, first, a conventional single power amplifier passive crossover system, and second, an active filter triamplification system. Both systems were subjected to three different objective tests and one subjective test. The subjective testing included a wide spectrum of listeners ranging from rank amateurs to highly trained recording and mixing engineers. …
Screening Electrocardiograms Using Hotelling's Method Of Principle Components, Edward G. Schwartz
Screening Electrocardiograms Using Hotelling's Method Of Principle Components, Edward G. Schwartz
Electronic Theses and Dissertations
Considerable use is presently being made of computers to classify electrocardiograms (ECGs) into various heart defect categories. An example of such a program is the "Electrocardiographic Analysis Program" developed jointly by the Mayo Clinic and IBM. In one of Dr. Caceres published reports, he tells of using a computer program which involves 5,000 instructions. Dr. Caceres does not say whether this is a commercial program or one of bis own. His description does place this program in the same general category as IBM's. These programs have the common criteria of examining the ECG for the same information that a cardiologist …