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Articles 1 - 20 of 20
Full-Text Articles in Engineering
Speech Synthesis Utilizing Microcomputer Control, Joseph N. Uzel
Speech Synthesis Utilizing Microcomputer Control, Joseph N. Uzel
Retrospective Theses and Dissertations
This report explores the subject of speech synthesis. Information given includes a brief explanation of speech production in man, an historical view of speech synthesis, and four types of electronic synthesizers in use today. Also included is a brief presentation on phonetics, the study of speech sounds. An understanding of this subject is necessary to see how a synthesizer must produce certain sounds, and how these sounds are put together to create words. Finally a description of a limited text speech synthesizer is presented. This system allows the user to enter English text via a keyboard and have it output …
An Analysis Of The Effect Of Vibration Sensitivity On Hydrophone Design, George Dickson Hugus
An Analysis Of The Effect Of Vibration Sensitivity On Hydrophone Design, George Dickson Hugus
Retrospective Theses and Dissertations
Hydrophones used in the ocean produce spurious outputs due to vibration sensitivity which can severely degrade measurement accuracy. Sources of these vibration inputs are ocean surface waves, flow turbulence, and induced mechanical vibration. The hydrophone response to these vibrations is a noise voltage output. This can leave to a signal-to-noise problem particularly when measurements of small sound pressure levels are to be made. The objective of this thesis is to analyze the vibration response of three typical piezoelectric hydrophone sensor elements configurations and give design methods and constraints for reducing the problem of vibration sensitivity to an acceptable level. The …
Phosphorus Content And Release From Lake Sediments By Agitation, Hsien Ping Tang
Phosphorus Content And Release From Lake Sediments By Agitation, Hsien Ping Tang
Retrospective Theses and Dissertations
Man-made mixing in shallow lakes will resuspend bottom sediments and increase phosphorus concentration in the water body. The increase in phosphorus content may affect the lake productivity. During the course of this study, a better understanding of the water-sediment-phosphorus relationships of some shallow lakes in Central Florida was attempted. Column studies and batch experiments were used to investigate the effect of mechanical mixing on the release of phosphorus from bottom sediments collected from Lake Claire and Jessup. The particle size distribution and density distribution of the bottom sediments were studied and the release of phosphorus from each fraction was measured. …
The Design And Analysis Of A Unique Broadband Underwater Acoustic Source, Allan Mark Young
The Design And Analysis Of A Unique Broadband Underwater Acoustic Source, Allan Mark Young
Retrospective Theses and Dissertations
Requirements exist for a unique type of underwater acoustic source. The transducer is in the form of a linear array of discrete elements and is required to have a constants transmitting voltage response and carefully controlled directivity characteristics over a two octave bandwidth. A generalized model of a linear array of cylindrical piezoelectric ceramic acoustic radiators is developed and applied to the design of a prototype which operates over approximately one half of the required bandwidth. The prototype transducer was built and the measured results are compared with those predicted by the model. Recommendations are made for improving the performance …
A Computer Model For Comparison Of Flat Plate And Focusing Collectors For Solar Air Conditioning, H. B. Bucher
A Computer Model For Comparison Of Flat Plate And Focusing Collectors For Solar Air Conditioning, H. B. Bucher
Retrospective Theses and Dissertations
Two types of solar collecting systems are frequently employed--flat plate collectors with spectrally selective windows which trap sunlight with the "greenhouse effect" and focusing systems with curved mirrors which concentrate the sun's rays on an absorbing surface. The flat plate collector is the simpler of the two designs, but cannot readily provide temperatures as high as the focusing collector. Both of the collectors are candidates for absorption cycle solar air conditioning systems. This role dictates higher temperature than are normally required of solar collectors, particularly the flat plate design. Focusing systems of interest here are those which are fixed in …
An Investigation Into A Least Squares Method For Image Registration, Ernest William Cordon
An Investigation Into A Least Squares Method For Image Registration, Ernest William Cordon
Retrospective Theses and Dissertations
One of the problems associated with the automatic image processing of satellite photographs such as weather maps is the need for image registration; that is, the fitting of a map that has some translational and rotational bias to a known data base. This paper investigates a least square method of image registration using an image that has been converted into a boundary map with a pixel representation 1 for land, -1 for water and zero for cloud pixels. A sampled correlation array is constructed by shifting the weather map to locations on a given grid, centered around a sampled correlation …
A Case Study Of A Solar Augmented Heating System Versus A Solar Assisted Heat Pump, Louis P. Braleski
A Case Study Of A Solar Augmented Heating System Versus A Solar Assisted Heat Pump, Louis P. Braleski
Retrospective Theses and Dissertations
The usage and applications of solar energy are numerous; however, it's still in its infancy. The subject matter discusses two applications of solar energy, a "Solar Augmented Heated System" and a "Solar Assisted Heat Pump." The solar augmented system and the solar assisted system have the same components; however, the way they are used is of primary concern. A solar system in parallel with a heat pump is called "Solar Augmented Heating System" or in series with a heat pump is a "Solar Assisted Heat Pump." A 2000 ft2 house was utilized as the basis of the design. The heating …
Sensitivity Analysis Of Stormwater Runoff Using The "Bmp" And "Nonpt" Computer Programs, George D. Flatt
Sensitivity Analysis Of Stormwater Runoff Using The "Bmp" And "Nonpt" Computer Programs, George D. Flatt
Retrospective Theses and Dissertations
No abstract provided.
Affinity Of Roadside Soils For Lead, Zinc, And Chromium, John H. Bell
Affinity Of Roadside Soils For Lead, Zinc, And Chromium, John H. Bell
Retrospective Theses and Dissertations
Highways are known to be a source of several toxic pollutants including the heavy metals lead, zinc and chromium. The need to manage highway runoff in a manner which reduces or eliminates the loading of heavy metals to receiving waters is evident, but more research has been required to develop cost-effective ways of meeting this need. Recent studies have indicated that the soil is a significant "sink" for heavy metals, allowing speculation that management practices which make use of the soil to retain metals from highway runoff should be employed. The purpose of this study is to evaluate the ability …
Site Selection For Air Pollution Monitoring In The Vicinity Of Point Sources, John C. Brown
Site Selection For Air Pollution Monitoring In The Vicinity Of Point Sources, John C. Brown
Retrospective Theses and Dissertations
Ever since air pollution became a national concern in the 1950's, more and more emphasis has been placed on collection of representative air samples for many purposed, to include (1) evaluation of the degree to which national ambient air quality standards are being met and (2) to monitor maximum emission levels from point sources. Until recently efforts were directed toward qualitative methods of siting monitors for representative sampling. Since the dispersion of effluents is most complex, the quality of the data collected on the basis of judgment and, more or less, incremental siting about the source, has become suspect. Furthermore, …
Realization Of A Fast Automatic Correlation Algorithm For Registration Of Satellite Images, John E. Kassak
Realization Of A Fast Automatic Correlation Algorithm For Registration Of Satellite Images, John E. Kassak
Retrospective Theses and Dissertations
The requirement for a fast automated correlation algorithm for registration of satellite images is discussed. An overview of current registration techniques is presented indicating a correlator, matching binary maps compressed from the original imagery, may provide the required throughput when implemented with a dedicated hardware/processor. An actual registration problem utilizing GOES digitally processed imagery is chosen and defined. The realization of a fast correlator, matching image input data with sampled data base reference image data in real time is considered.
Power Inverters, Ezzatollah. Vahedi-Faridi
Power Inverters, Ezzatollah. Vahedi-Faridi
Retrospective Theses and Dissertations
This paper treats the theory and basic design of a DC-AC inverter. The output voltage, a periodic wave form, is derived from a low level DC source. The inverter's operation is described in detail for two different classes of switching device: SCR and transistor. A new design configuration which achieves higher efficiency than most commercial inverters on the market is discussed. Laboratory measurements for the design are tabulated in order to give an estimate of its performance.
Investigations Of Inertia Effects On An Infinite Solid Cylinder Due To Thermal Shock, Roland Vanderbilt Williams
Investigations Of Inertia Effects On An Infinite Solid Cylinder Due To Thermal Shock, Roland Vanderbilt Williams
Retrospective Theses and Dissertations
In this paper the effects of inertia are explored for the case of a thermal excitation applied on the surface of an infinitely long, solid circular cylinder. The linear uncoupled field equations for a homogeneous, isotropic, thermoelastic medium are used to derive the desired field equations of stress and displacement. The solution procedure included, first, the determination of the thermal boundary value problem from the energy equation which is identically satisfied for the uncoupled condition. Secondly, substitution of the strain-displacement relationships and the previously obtained thermal relation into the equilibrium equation containing inertial effects. The equilibrium equation is the only …
Simulation Of Domestic Hot Water System Using Trnsys, Mohammed Shafi Uz Zaman
Simulation Of Domestic Hot Water System Using Trnsys, Mohammed Shafi Uz Zaman
Retrospective Theses and Dissertations
A Transient Simulation program (TRNSYS) was used to formulate the simulation of a domestic hot water system. Solar percent utilization and collector efficiency was observed for different set temperatures and hot water demand. The effect of hot water demand pattern on these parameters was likewise investigated. Regression analysis was used to forecast solar percent utilization with respect to set temperature and daily hot water demand.
Digital Computer Analysis Of The Kinetic Response Of A Thermal Pressurized Water Reactor Power Plant, John F. Alburger
Digital Computer Analysis Of The Kinetic Response Of A Thermal Pressurized Water Reactor Power Plant, John F. Alburger
Retrospective Theses and Dissertations
A digital computer model has been developed to simulate the kinetic response of a thermal pressurized water reactor power plant. The program is capable of predicting core power and plant temperature variations which result from disturbances due to routine demand changes, control rod movement, and fission product poison transients as well as from transients during plausible accident situations. The development of the differential equations describing the influence of various primary plant components on the dynamics of the reactor have been heretofore documented in the literature. Finite difference equations facilitating the employment of a digital computer solution are fully derived. Confidence …
A Search For An Edge Image Algorithm For Application In An Automatic Registration System, Ronald J. Wojtasinski
A Search For An Edge Image Algorithm For Application In An Automatic Registration System, Ronald J. Wojtasinski
Retrospective Theses and Dissertations
No abstract provided.
The Design And Development Of A Power Hybrid, Robert J. Albert
The Design And Development Of A Power Hybrid, Robert J. Albert
Retrospective Theses and Dissertations
This report discusses the design, development and the fabrication of a power hybrid. Foldback current limiting which is self reseting is used whereby withstanding indefinitely a short circuit. Thermal design considerations and thermal analysis are described as well as stability analysis. The maximum current capability of this design is four amperes and forty watts can be dissipated in the power transistors over a wide range of temperatures.
Design Curves For Groundwater Mounds Beneath Recharging Basins, Jack Weinstein
Design Curves For Groundwater Mounds Beneath Recharging Basins, Jack Weinstein
Retrospective Theses and Dissertations
Design curves are developed to simplify solution of the Hantush (1967) equation for groundwater mound build-up under a rectangular recharge basin. Curves are developed by analyzing a large number of solutions to the theoretical equation. Two sets of curves are developed, one for build-up beneath the center of the basin, the second for build-up anywhere in the field. Center-point curves are presented for 3 basins with length to width ratios of 2 to 1, and were easily developed. The more generalized curves are developed for the limited case of a 200 ft by 100 ft basin and are complicated by …
A Simple Multicoupled Band-Pass Active Filter Design Employs Resistor Summing To Provide Multicoupling, Talal K. Chatila
A Simple Multicoupled Band-Pass Active Filter Design Employs Resistor Summing To Provide Multicoupling, Talal K. Chatila
Retrospective Theses and Dissertations
The purpose of this paper is to present a new design configuration for multicoupled band-pass filter based on Mason's loop rule, together with the negative feedback topology and to compare it with Leap Frog (LF) and Follow the Leader Feedback (FLF) design examples.
Analysis Of System Reliability As A Capital Investment, Albert J. Williams
Analysis Of System Reliability As A Capital Investment, Albert J. Williams
Retrospective Theses and Dissertations
This report, "Analysis of System Reliability as a Capital Investment", is an analysis of radar system reliability of two similar tracking radar systems as a capital investment. It describes the two tracking radar systems and calculates the mission failures rates based upon field failure data. Additionally, an analysis of a simulation program written in FORTRAN is performed which treats system reliability as a capital investment based on 335 electronic systems that were fabricated with a reliability program versus 564 electronic systems fabricated without a reliability program. The data from the two tracking radar systems, one with reliability program and the …