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Articles 4411 - 4440 of 4566

Full-Text Articles in Engineering

Thermal Control Of An Electronic Enclosure Utilizing A Vapor Chamber, Michael L. Dougherty Jan 1976

Thermal Control Of An Electronic Enclosure Utilizing A Vapor Chamber, Michael L. Dougherty

Retrospective Theses and Dissertations

This thesis addresses the problem of extracting heat from sealed electronic enclosures. Typical industry practice is to use various air-to-air and air-to-liquid heat exchangers. These techniques are known to require costly custom designs. This thesis points out how one can apply heat pipe technology in the form of a vapor chamber to solve this type of problem. The details on the design and testing of two prototype vapor chambers are cited. Included in the text are typical industrial applications that require sealed enclosures to protect their associated electronic control hardware. Also mentioned is some historical background on heat pipes.

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Sewer System Design For Camp Challenge And Determination Of Per Capita Wastewater Flows From Vacation Facilities, William C. Goucher Jan 1976

Sewer System Design For Camp Challenge And Determination Of Per Capita Wastewater Flows From Vacation Facilities, William C. Goucher

Retrospective Theses and Dissertations

A sewer system was designed for Camp Challenge of the Florida Easter Seal Society, in Mount Plymouth, Florida, of polyvinyl chloride piping. Invert elevations were tabulized and necessary fittings determined for the system. Cost estimates were also included. The sewers were designed on a per fixture basis so as not to overdesign using per capita flow rates. A literature and records search was conducted to obtain design and actual wastewater flow quantities in gallons per capita per day (gpcd). Actual flows determined from 4 camps and 11 travel trailer parks gave average values of 39 and 33 gpcd, respectively, and …

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An Industrial Wastewater Treatment Review For The Textile And Pulp And Paper Industries Of Srilanka, Kolonne A. Wijeratne Jan 1976

An Industrial Wastewater Treatment Review For The Textile And Pulp And Paper Industries Of Srilanka, Kolonne A. Wijeratne

Retrospective Theses and Dissertations

A legislative authority empowered to protect Srilanka's environment, operating similarly to the Environmental Protection Agency of the U.S., is needed, along with wastewater treatment. Wastewater parameters of importance in treatment are BOD, COD, total suspended solids, settleable solids, pH, colour, turbidity, ammonia or nitrate nitrogen, heavy metals, sulfides, phosphates, and phenols. Methods of industrial waste treatment vary depending on the climatic conditions, the industry, raw materials, and process adopted. Textile and pulp and paper industries exist in Srilanka and have very high pollution potential. Methods of treatment to finally generate reasonably good quality effluent are available. Processing of effluents from …

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Life Cycle Cost Model As Applied To Training Simulators, Frederick Adrian Davis Jan 1976

Life Cycle Cost Model As Applied To Training Simulators, Frederick Adrian Davis

Retrospective Theses and Dissertations

No abstract provided.

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Carbon Removal Of Organohalides In Drinking Water, William Ray Mccurley Jan 1976

Carbon Removal Of Organohalides In Drinking Water, William Ray Mccurley

Retrospective Theses and Dissertations

Drinking water samples provided by Orlando Utilities from various locations and from Florida Technological University were analyzed for organohalides. Compounds tentatively identified were 0.0024 mg/l DDT, 0.003 mg/l phosdrin, 0.00036 mg/l BHC, and 0.000095 mg/l endosulfan. These concentrations are well below recommended limits for drinking water. Two water samples were mixed with 10 mg/l of 20-40 mesh granular activated carbon, agitated for 2 minutes and then allowed to settle in the flask for 45 minutes. A reduction in the organohalide concentration varied from 25 to 98 percent of the original concentration. Also, a solution of seven common pesticides of 0.1 …

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Dynamic And Stability Characteristics Of An Articulated Frame Railway Passenger Truck, David Kenneth Platner Jan 1976

Dynamic And Stability Characteristics Of An Articulated Frame Railway Passenger Truck, David Kenneth Platner

Retrospective Theses and Dissertations

Mass transit vehicles in formal rail service frequently attain speeds which can excited carbody oscillations (primary hunting), as well as sustained lateral oscillations of the trucks (secondary hunting). The carbody motions have been shown to generate passenger discomfort and sustained truck hunting can lead to derailment. This thesis developed approximate equations which predict the carbody hunting frequencies, as well as the hunting speed of an articulated frame truck. The linear equations of motion are derived from a simplified model of a railway vehicle. A comparison indicates the results obtained using the approximate truck hunting equation presented here are within ten …

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Stormwater Infiltration Thru Sewer Lines In Brevard County, Florida, Robert Earl Stubbe Jan 1976

Stormwater Infiltration Thru Sewer Lines In Brevard County, Florida, Robert Earl Stubbe

Retrospective Theses and Dissertations

This is a broad study of stormwater infiltration and inflow effects on two sewer systems with an equivalent size for comparison in Brevard County, Florida. The systems are Rockledge, which is located on the highest ground in the area, and Cocoa Beach, which is located down in the local water table. Rainfall data, sewage flow, quality, and flow rates were collected from the Brevard Public Health Department, Cocoa Beach and Rockledge sewage Plants, weather stations, and the Cocoa Water plant. The data indicated minimum, or no infiltration thru the Rockledge wastewater collection system. However, infiltration thru the Cocoa Beach system …

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Theory Of Eddy Currents For Nondestructive Testing, Craig Charles Biddle Jan 1976

Theory Of Eddy Currents For Nondestructive Testing, Craig Charles Biddle

Retrospective Theses and Dissertations

Eddy current inspection methods are used extensively in industry for the nondestructive testing of a wide variety of materials and product applications. The general theory of eddy current inspection is described. Equations defining the depth of penetration are derived from Maxwell's equations. Signal analysis methods are described using coil impedance diagrams. The impedance diagrams for a number of inspection applications are presented. A discussion of the techniques for theoretical calculation of the impedance of a coil is described. Typical coil configurations and instrumentation techniques are discussed.

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Factors In Modeling Floridan Aquifer Recharge, Harlan Alfred Hannah Jan 1976

Factors In Modeling Floridan Aquifer Recharge, Harlan Alfred Hannah

Retrospective Theses and Dissertations

No abstract provided.

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Security In Automatic Data Processing Systems, Eduardo G. Mendez Jan 1976

Security In Automatic Data Processing Systems, Eduardo G. Mendez

Retrospective Theses and Dissertations

Security in automatic data processing systems is concerned with the protection of equipment and data against unauthorized modifications or destruction, and accidental or intentional disclosure of information. This report consists of two parts: 1. An overview of current literature in the field. In this part, basic problems and solutions, terminology and concepts found in the theoretical aspects of data processing systems security are described. 2. A survey of the state of art in a sample area. During the survey, information about actual applications of security methods in the Orlando, Florida area was collected. This information was gathered by means of …

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An Interactive Information System For Tracking Student Academic Progress And For Projecting Quarterly Course Enrollments, Marilyn Sellers Khorsandi Jan 1976

An Interactive Information System For Tracking Student Academic Progress And For Projecting Quarterly Course Enrollments, Marilyn Sellers Khorsandi

Retrospective Theses and Dissertations

An interactive information system has been developed for the College of Engineering to promote faster and more accurate trial advisement interviews between professors and the students they advice. This system also provides departmental administrative personnel with information to guide course scheduling. The system has the capability of providing the following information concerning undergraduate students enrolled in the College of Engineering: 1. A student's academic progress toward graduation. 2. A projection for four quarters of enrollments in engineering core courses. 3. The current status of any course offered as a requirement for obtaining a Bachelor's Degree in one of the Engineering …

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The Effects Of Altered Traffic Signs Upon Vehicular Driving Modes And Consequent Fuel Conservation And Environmental Benefits, As Measured By Vehicular Noise-Imprints, Mark Daniel Pfarrer Jan 1976

The Effects Of Altered Traffic Signs Upon Vehicular Driving Modes And Consequent Fuel Conservation And Environmental Benefits, As Measured By Vehicular Noise-Imprints, Mark Daniel Pfarrer

Retrospective Theses and Dissertations

The hypothesis is that the recorded noise-imprints of a vehicle at an intersection can be used to identify and accurately time the driving modes of deceleration, idle, slow cruise, and acceleration. This is proven by analyzing and comparing noise-imprints of vehicles at an uncontrolled intersection marked first with a "stop" sign, and then by a "yield" and an experimental "dead slow" sign. By relating the duration of each driving mode to known relations, the overall efficiency of an intersection can be characterized. A new technique for studying various types of traffic conditions at intersections is the result. Initial noise-imprint analysis …

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A Study Of Differences In Vertical Phosphorus Profiles Within The Sediments Of Selected Florida Lakes As Related To Trophic Dynamics, Edgar Allen Stewart Iii Jan 1976

A Study Of Differences In Vertical Phosphorus Profiles Within The Sediments Of Selected Florida Lakes As Related To Trophic Dynamics, Edgar Allen Stewart Iii

Retrospective Theses and Dissertations

Several Florida lakes with different documented trophic state indices were selected for sediment analysis. Vertical sections of the sediment were taken at depths of .1, .5, 1, 2, 3, 4, 5, 6, 10 and l5 centimeters below the surface of the sediment-water interface. Total Phosphorus analysis was done on each section. The profile presented was then evaluated and was found that the profiles best fit the equation Y = X/ (A + BX), where Y is the Phosphorus Concentration in ppm and X is the sediment depth in cm. Correlation between the trophic state and the profiles characteristics are presented. …

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The Generation Of Synthetic Speech Sounds By Digital Coding, Eddy Alan Steinberger Oct 1975

The Generation Of Synthetic Speech Sounds By Digital Coding, Eddy Alan Steinberger

Retrospective Theses and Dissertations

The feasibility of representing human speech by serial digital codes was investigated by exercising specially constructed digital logic coupled with standard audio output equipment. The theories being tested represent a radical departure from previous efforts in the field of speech research. Therefore, this initial investigation was limited in scope to a study of unconnected English language speech sounds at the phenome level. The experiments were conducted in two parts, with the first being the development of serialized digital codes, for selected speech sounds, derived from actual human speech. The second part was to synthesize these sounds using the specially constructed …

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Design And Calibration Of A Three Component, Single Element, Wind Tunnel Force Balance, Victor W. Tisdel Jan 1975

Design And Calibration Of A Three Component, Single Element, Wind Tunnel Force Balance, Victor W. Tisdel

Retrospective Theses and Dissertations

The purpose of this paper was to design a simplified wind tunnel force balance for use in elementary aerodynamics/wind tunnel laboratory courses. The applied loads and moments were determined to be as follows: The design lift force is ± 20 lbs, the design drag force is ± 10 pounds, the design pitching moment is ± 20 inch-pounds. The force balance output accuracy was arbitrarily set at ± 5% since this would be sufficient for preliminary student work. The results of this work are as follows: The force balance is fabricated from a single bar of 2024 aluminum, machines and bent …

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Clustering Concepts In Automatic Pattern Recognition, Patricia J. Defilipps Jan 1975

Clustering Concepts In Automatic Pattern Recognition, Patricia J. Defilipps

Retrospective Theses and Dissertations

During the past decade and a half, there has been a considerable growth of interest in problems of pattern recognition. Contributions to the growth have been from many of the disciplines including statistics, control theory, operations research, biology, linguistics, and computer science. One of the basic approaches to pattern recognition is cluster analysis, in which various methodologies may be successfully employed. It is the purpose of this research report to investigate some of the basic clustering concepts in automatic pattern recognition.

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A Simulation Analysis Of Traffic Congestion In Telephone Systems, Raymond Banks Duncan Jan 1975

A Simulation Analysis Of Traffic Congestion In Telephone Systems, Raymond Banks Duncan

Retrospective Theses and Dissertations

No abstract provided.

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Maintainability Analysis Of Radio Guidance System Ground Support Equipment, Albert John Malerk Jan 1975

Maintainability Analysis Of Radio Guidance System Ground Support Equipment, Albert John Malerk

Retrospective Theses and Dissertations

No abstract provided.

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High-Speed Bipolar Microprocessor Usage For Extracting A Constant Frequency Signal From A Pulse Stream, Lenard Jay Persin Jan 1975

High-Speed Bipolar Microprocessor Usage For Extracting A Constant Frequency Signal From A Pulse Stream, Lenard Jay Persin

Retrospective Theses and Dissertations

This report presents an initial design effort for a high-speed, constant Frequency data extractor, which can be used to identify and track a particular constant frequency signal in the presence of other signals. Several factors must be included in the design considerations. The detection and acquisition of the correct signal should be accomplished at high speed to remain as close as possible to real time. Once detection has occurred, the system should generate a track-predict gate signal that enables the input line only when the real input pulse is expected. If track is lost, which happens whenever the track-predict gate …

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Septic Tank And Chemical Pumpings Evaluation, George C. Cushnie Jan 1975

Septic Tank And Chemical Pumpings Evaluation, George C. Cushnie

Retrospective Theses and Dissertations

No abstract provided.

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A Study Of Assimilative Capacities For Receiving Streams, Hadi. Elmi Jan 1975

A Study Of Assimilative Capacities For Receiving Streams, Hadi. Elmi

Retrospective Theses and Dissertations

Literature reviews on various stream processes which contribute to reoxygenation and deoxygenation was presented. These processes include atmospheric reaeration, photosynthesis-respiration, biochemical oxygen consumption, and benthic demand. Measuring these parameters in a selected stream is a complex and costly operation. On the other hand, prediction models developed are specific to particular location and environmental conditions and can only be applied to similar situations. Computer models such as "RIVER" are available and could be used to predict dissolved oxygen concentrations along a waterway for a specified set of stream conditions. The model "RIVER" was calibrated by using the existing conditions of flow …

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An Application Of A Computerized Mathematical Model For Estimating The Quantity And Quality Of Nonpoint Sources Of Pollution From Small Urban And Nonurban Watersheds., Charles John Ingraham Jan 1975

An Application Of A Computerized Mathematical Model For Estimating The Quantity And Quality Of Nonpoint Sources Of Pollution From Small Urban And Nonurban Watersheds., Charles John Ingraham

Retrospective Theses and Dissertations

The problem of "Total Water Management" is reviewed; particular emphasis is given to the magnitude and intensity of pollution from nonpoint sources. The relationship between land usage in south Florida and subsequent effects upon receiving water bodies is discussed. Basic factors effecting hydrological and ecological subsystems are illustrated. The U.S. Army Corps of Engineers Urban Storm Water Runoff Mathematical Model, "STORM," is introduced. Model parameters and methodology are discussed. The mathematical relationships and modeling processes are reviewed and the model is exercised using a "new generation" southeast Florida community (The City of Palm Beach Gardens) as the subject of study. …

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Lake County, Florida Solid Waste Management Plan, Lawrence J. Morey Jan 1975

Lake County, Florida Solid Waste Management Plan, Lawrence J. Morey

Retrospective Theses and Dissertations

The history of solid waste management in Lake County, Florida is reviewed. The role of governmental agencies is mentioned. Local environmental characteristics and transportation systems are discussed. Existing collection and disposal practices are presented. A land use analysis of the unincorporated areas of the County is given. Projections of population and solid waste quantities are listed. Two computer models are presented. Their optimum solutions are analyzed in detail. The cost associated with implementing either plan is presented. A recommended plan is given based on a combination of transfer stations and sanitary landfills.

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Stormwater Runoff From Shopping Centers, Thomas P. Donigan Jan 1975

Stormwater Runoff From Shopping Centers, Thomas P. Donigan

Retrospective Theses and Dissertations

This is a brief investigation of stormwater runoff from a large shopping center located in Brevard County, Florida. Merritt Square Shopping Center has a parking area for 4,700 automobiles and is located on the shore of Newfound Harbor which is classified as recreation waters (Class III). A literature survey of runoff studies in other areas has been made for both "state of the art" and evaluation of findings. Water samples were initially collected from five locations. Review of the analysis of these samples indicated that while color and turbidity appeared to decrease linearly with time, organic and inorganic concentrations did …

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An Analysis Of The Progress In Automation Of Manned Space-Craft Test And Checkout, John E. Malone Jan 1975

An Analysis Of The Progress In Automation Of Manned Space-Craft Test And Checkout, John E. Malone

Retrospective Theses and Dissertations

Manned Spacecraft Programs are the largest research and development tasks ever undertaken by the government or by private industry in the United States. Under the direction of the National Aeronautic and Space Administration (NASA) these programs have advanced from Project Mercury in the early 1960's through Gemini, Apollo, including Moon Landing, and Skylab Programs to the present day Space Shuttle Program. With the development of each new program, there comes a growing awareness of the ever increasing complexity of tasks relating to integrated preflight test and checkout. Data rates have grown from one (1) pulse amplitude modulated/frequency modulated (PAM/FM) link …

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Mixing Effects On Shallow Water Bodies, Kim Robin Powell Jan 1975

Mixing Effects On Shallow Water Bodies, Kim Robin Powell

Retrospective Theses and Dissertations

This report is intended to examine the ecological changes due to mixing in shallow water bodies. Physical, chemical, and biological changes are reported in literature. A literature search revealed the range of mixing nodes or processes. Assessment of ecological changes due to mixing by boating activities had been evaluated in a research project supported by the environmental Protection Agency and conducted at Florida Technological University. The examination of changes due to mechanical mixing on lake ecology simulated in fifty-five gallon drums indicated the sensitivity of such parameters as total Kjeldahl nitrogen, conductivity, pH, temperature, and dissolved oxygen. Problems of reproducibility …

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A Status Report On Solar Energy Utilization In The State Of Florida, Henry Michael Armstrong Jan 1975

A Status Report On Solar Energy Utilization In The State Of Florida, Henry Michael Armstrong

Retrospective Theses and Dissertations

The current energy crisis has pointed out the need for alternative, non-depletable sources of power. Solar energy would appear to be a likely source of such power for the state of Florida where the average home receives enough of this energy to supply all of its heating and cooling needs during the course of the year. Energy consumption profiles for Florida reveal that almost one-quarter of all energy is consumed within the residential-commercial section for basic heating and cooling. Additionally, the state is, essentially, totally dependent on petroleum and natural gas for its energy supply. Solar energy has been used …

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Feasibility Study Of The Utilization Of Solar Energy For Large Scale Power Production In The State Of Florida, Michael Propen Jan 1975

Feasibility Study Of The Utilization Of Solar Energy For Large Scale Power Production In The State Of Florida, Michael Propen

Retrospective Theses and Dissertations

The objective of this paper is to investigate the feasibility of large scale electric power generation in the state of Florida by means of solar conversion. Such systems convert solar radiation directly to electricity or to thermal energy and subsequently to electricity. With the latter method, solar energy is initially collected and converted to heat at high temperature through a working fluid. The heat is then used to power conventional heat engine generator systems. Several methods have been proposed for converting sunlight to useful work. The most promising of these will be examined from a technological and economic viewpoint.

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The Effects Of Gap Stability On Entrance Ramp Merging, Lyn Evalyn Lane Jan 1975

The Effects Of Gap Stability On Entrance Ramp Merging, Lyn Evalyn Lane

Retrospective Theses and Dissertations

This report analyzes freeway data from a moving merge control system in Tampa, Florida. The distribution of velocity at sensors in the roadway is plotted and compared to a normal distribution. The size of the gaps at each sensor are computed and compared to those at a sensor downstream. The distributions of the change in gap size are plotted for all gaps and then for gaps between the same pairs of vehicles, to determine the effects of prohibiting lane changing. The expected time of arrival of the gaps at a point downstream are computed, compared to the actual time of …

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Analysis Of Unstable-Resonator And Optical-Train Laser Alignment Systems By The Use Of Matrix Methods Of Gaussian Optics, Frederick H. White Jan 1975

Analysis Of Unstable-Resonator And Optical-Train Laser Alignment Systems By The Use Of Matrix Methods Of Gaussian Optics, Frederick H. White

Retrospective Theses and Dissertations

A high-power gas dynamic-laser example system is described, and its optical elements are represented in the ABCD-matrix formalism of Gaussian optics. Propagation of Gaussian beams, image formation, focusing, and steering by transverse refractive-index gradients are modeled with the ABCD matrix technique. The effects of small translations and rotations of optical elements are represented as matrices and vectors in the ABCD-matrix formalism, and are analyzed as component misalignments with single and multiple beam reflections. Example calculations show that alignment beams making multiple round trips inside an unstable resonator can easily provide satisfactory resonator alignment and designation of the aim point of …

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