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Articles 4291 - 4320 of 4566

Full-Text Articles in Engineering

A Microcomputer Implementation Of Real Time, Continuously Programmable Digital Filters, William Edward Storma Oct 1979

A Microcomputer Implementation Of Real Time, Continuously Programmable Digital Filters, William Edward Storma

Retrospective Theses and Dissertations

When a filter transfer function in s is replaced with the bilinear transform in z, the resulting discrete model represents the original continuous model within a second order accuracy of integration. A unique set of recently discovered minimum memory algorithms that perform the bilinear transform on a continuous transfer function are implemented on an INTEL 8080 microprocessor system. Scaling techniques are used to frequency scale all transfer functions to a standardized frequency. All data words are represented in a signed binary double precision format to maintain higher calculation speed and accuracy. Three test case transfer functions of different order are …

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Optical Fiber Dispersion Characterization, Alan Edward Geeslin Oct 1979

Optical Fiber Dispersion Characterization, Alan Edward Geeslin

Retrospective Theses and Dissertations

This thesis discusses the dispersion of optical pulses in fiber waveguides. Procedures for determining the transfer function of an optical fiber using either time domain measurements or frequency domain measurements are given. A test set is described which uses time domain measurements for dispersion characterization. Complex transfer function data are presented for various fiber lengths as well as optical connectors. Prediction of bandwidths of long fibers from bandwidth/measurements taken on shorter length fibers is discussed. A relation between the bandwidth of cascaded connectors in terms of the bandwidth of a single connector is obtained.

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The Effect Of Ozone On Trihalomethane Precursors In Raw And Magnesium Treated Lake Washington Water, James Kent Kimes Oct 1979

The Effect Of Ozone On Trihalomethane Precursors In Raw And Magnesium Treated Lake Washington Water, James Kent Kimes

Retrospective Theses and Dissertations

A bench scale laboratory ozonator was constructed and determined to produce 27 mg O3/hr. A contacting system and experimental procedure was developed to approximate a mass balance of 0, 1, 2, 4, 8 and 16 ppm were applied to raw and magnesium treated water from Lake Washington which is the potable water source for Melbourne, Florida. The effect of ozone on trihalomethane precursors was studied by comparing THM formation at 1, 24, 48, 72, and 96 hours following chlorination. The concentrations of each specie, chloroform, bromodichloromethane, dibromochlormethane and bromoform are reported. The highest 96 hour TTHM concentrations reported were 2773 …

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The Theory And Application Of Frequency Domain Deconvolution Using Optimum Compensation In Time Domain Measurement, Robert Bruce Stafford Oct 1979

The Theory And Application Of Frequency Domain Deconvolution Using Optimum Compensation In Time Domain Measurement, Robert Bruce Stafford

Retrospective Theses and Dissertations

This thesis describes a method of transforming a deconvolution problem into an equivalent convolution problem. A short discussion of the theory behind convolution and deconvolution is included, along with a survey of techniques now being used. A new method using a synthesized compensator is proposed and mathematically developed. Finally, the results of applying this method to several real and analytical signals are given.

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A Feasibility Study Of Computer Aided Coding Of Ground Operations Aerospace Language (Goal), Harvey Glenn Lanier Oct 1979

A Feasibility Study Of Computer Aided Coding Of Ground Operations Aerospace Language (Goal), Harvey Glenn Lanier

Retrospective Theses and Dissertations

The introduction of a new checkout language at Kennedy Space Center has required more effort to create test and operations software than anticipated. The new language is called GOAL, for Ground Operations Aerospace Language. The feasibility of a computer aided GOAL coding system that would reduce the effort required to create GOAL programs is investigated in this report. A background of GOAL, its coding requirements, and the facilities used at present for GOAL coding is presented first. Next, the computer aided GOAL coding concept is presented, and requirements for such a system are developed. After the requirements are presented, a …

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Simulation Model To Evaluate Performance Of Operational Systems And Their Impact On Repair Shop Activity At A Navy Field Site, James T. Newell Oct 1979

Simulation Model To Evaluate Performance Of Operational Systems And Their Impact On Repair Shop Activity At A Navy Field Site, James T. Newell

Retrospective Theses and Dissertations

This paper presents the background and procedures leading to development of a simulation model to analyze the impact of certain decision variables on operational system performance and workloads as the repair facility of a typical Navy field site. The research examines the impact of maintenance support concepts, as implemented by changes in the decision variables, associated with the broader application of Automatic Test Equipment. The initial effort consisted of data collection and field site surveys which culminated in defining a work flow model illustrating typical repair facility operations. The work flow model is translated into a computer simulation model. The …

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Software Quality Assurance, Edward C. Soistman Jul 1979

Software Quality Assurance, Edward C. Soistman

Retrospective Theses and Dissertations

The problems associated with software development and use are investigated from a management point of view. Having identified the critical aspects of effective software management, an approach is suggested for the creation and implementation of a software quality assurance program, Particular attention is focused on the concept of Life Cycle Procurement as currently utilized by the Department of Defense. The research was accomplished in two phases. The first consisted of an extensive literature search, seminar attendance and participation in several working groups assigned the responsibility for establishing software quality assurance guidelines. The second phase involved direct participation in the development …

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The Development Of Quiet Jet Engine Technology, Bradley D. Beck Jul 1979

The Development Of Quiet Jet Engine Technology, Bradley D. Beck

Retrospective Theses and Dissertations

The physical properties and subjective characteristics of sound and several special methods of measuring sound levels are discussed in order to provide a basic understanding of sound in general and noise in particular. The Federal Aviation Administration's regulation, FAR36, which stipulates the allowable perceived noise levels produced by commercial jet aircraft, is examined in detail. The principle of jet propulsion, the basic components of turbojet and turbofan engines, the theory of aerodynamic sound and the origin of the perceived noise decibel (which is the basic unit for measuring aircraft noise) are presented to provide an understanding of the fundamentals of …

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Treatment Process Variations To Reduce Tthm Residuals In A Finished Water, Edward L. Hatcher Jul 1979

Treatment Process Variations To Reduce Tthm Residuals In A Finished Water, Edward L. Hatcher

Retrospective Theses and Dissertations

This research investigates organic polymers, inorganic coagulants and separate unit operations for their effect on the total tri-halogenated (TTHM) residuals in a finished water. The water samples utilized for this project were taken from a highly colored Central Florida potable water supply which is used by municipality which has a TTHM concentration in the finished water in excess of the proposed Federal limit. Results indicate that (1) organic polymers are not a significant source of THM precursors, (2) organic polymers, when used as a settling aid after coagulation in Jar tests, are an effective means of filtration for removing THM …

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Employee Attitude Invariance: A Guide For Personnel Practitioners, Robert A. Cohen Jul 1979

Employee Attitude Invariance: A Guide For Personnel Practitioners, Robert A. Cohen

Retrospective Theses and Dissertations

No abstract provided.

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A Microcomputer Implementation Of A Flight Simulator Visual Display System, Jerry Wayne Campbell Jul 1979

A Microcomputer Implementation Of A Flight Simulator Visual Display System, Jerry Wayne Campbell

Retrospective Theses and Dissertations

The use of computer graphics has brought about a universal means of depicting phenomena or solving engineering problems. The combination of graphic and computer skills offers a solution to a number of technical needs. One major area that computer graphics can be used is in the field of flight simulation. The software packages necessary to project three-dimensional scenes for flight training are not very common. The purpose of this paper is to generate the programs necessary to allow the pilot to observe a three-dimensional scene from any location and angle. The report discusses some of the basic aspects of computer …

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Coupling Efficiency And Alignment Sensitivity Of Single Mode Optical Fibers, James Mathew Martin Apr 1979

Coupling Efficiency And Alignment Sensitivity Of Single Mode Optical Fibers, James Mathew Martin

Retrospective Theses and Dissertations

Coupling efficiency an alignment sensitivity models for the coupling of light from a fundamental mode Gaussian light beam into a single mode optical fiber are given. Experimental results are presented which verify the coupling and misalignment predictions of the models. Data were taken at two wavelengths: 0.6328 and 0.8460 micrometers. The light sources were a HeNe laser and a GaAlAs laser respectively. Coupling efficiencies were measured versus beam spot size; and lateral, axial and angular misalignments of the beam and fiber axes.

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Optimization Of Stormwater Management Practices And Processes, Mark Michael Calabrese Apr 1979

Optimization Of Stormwater Management Practices And Processes, Mark Michael Calabrese

Retrospective Theses and Dissertations

In recent years, stormwater has been found to be a major source of pollution to receiving waters. Major research efforts have been directed in this area, primarily as a result of the Federal Water Pollution Control Act and Public law 92-500, the 1972 Amendments to the act. Yet, a need remains for more data in the field of stormwater management. Such needs include cost-performance data and planning methodologies to optimally select best management practices (BMP's). The research culminating in this report addresses these needs. A computer program, "MANAGE", has been written to generate cost/efficiency curves, and uses these curves to …

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Critical Exposure Pathways: An Analysis Of The Environmental Impact Of Gaseous Effluents From Light-Water-Cooled Reactors, Robert Danna Apr 1979

Critical Exposure Pathways: An Analysis Of The Environmental Impact Of Gaseous Effluents From Light-Water-Cooled Reactors, Robert Danna

Retrospective Theses and Dissertations

The analysis of the environmental impact of routine radioactive gaseous releases from operating nuclear power stations is discussed using a radiation dose assessment. This analysis includes a discussion of the origin of radionuclide effluents, a discussion of federal policies, and a calculation of radiation doses to man. A model of estimating the radioactive dose from gaseous effluents from light-water-cooled reactors is described using guidelines described in the Code of Federal Regulations and the Nuclear Regulatory Commission's Regulatory Guides. The environmental impact of these sources is then analyzed using dose rates calculated along critical exposure pathways for various radioactive nuclides. Examples …

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A Computer Program For Analyzing Moist Air In Fin And Tube Crossflow Heat Exchangers, Robert F. Stricker Apr 1979

A Computer Program For Analyzing Moist Air In Fin And Tube Crossflow Heat Exchangers, Robert F. Stricker

Retrospective Theses and Dissertations

A computer model of a fin and tube air-to-air heat exchanger is presented. The model incorporates a computational scheme to account for latent effects due to small amounts of moisture in one or both fluid streams. A testing program is described which was performed in order to mathematically characterize the heat transfer and pressure drop relationships of the tube with turbulator used in the heat exchanger. These relationships are included in the computer model. A comparison of the computer model to heat exchanger test data indicates that the computer model may be relied upon to provide design and analysis information. …

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Microcomputers: An Alternative For Digital Controllers, Richard Brooke Wavell Apr 1979

Microcomputers: An Alternative For Digital Controllers, Richard Brooke Wavell

Retrospective Theses and Dissertations

Two candidate microprocessors are selected to demonstrate that microprocessors can be effectively utilized in digital control applications. The Intel 8085A-2 is selected to represent 8-bit microprocessors and the Intel 8086 is selected to represent 16-bit. A baseline second order digital filter algorithm is developed for comparison of the performance of the two microprocessors for both software and hardware multiply implementations. Emulation techniques are utilized to facilitate performance comparison, without large investments in software and hardware development. In addition, they provide a method for evaluating new microprocessors, before hardware becomes available. The emulations are then used to verify and to determine …

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A Co-Op Advertising Information System, Kay C. Gardner Apr 1979

A Co-Op Advertising Information System, Kay C. Gardner

Retrospective Theses and Dissertations

This report presents the development of a business information system for co-op advertising. An underlying assumption is that information systems add value to an organization. It is an application of data bank theory, and demonstrates the techniques required to maintain a current information system, i.e., add, change, and delete capabilities. The master file is sequentially accessed to produce reports by participation percentage, classification, or expiration date.

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Environmental Aspects Of The Nuclear Fuel Cycle And High-Level Radioactive Waste Disposal, Robert S. Kent Apr 1979

Environmental Aspects Of The Nuclear Fuel Cycle And High-Level Radioactive Waste Disposal, Robert S. Kent

Retrospective Theses and Dissertations

An assessment of the environmental effects of the nuclear fuel cycle industries is discussed, reactor waste inventory and standards are presented, and the alternatives for high-level radioactive waste disposal reviewed, with particular attention being given to disposal in deep geological formations on land. One of the major concerns regarding potential impacts of the nuclear fuel cycle industries is the lack of a definite and proven method of disposal of the high-level radioactive wastes from light water moderated reactors. The problem is expected to become more pressing as the nuclear power industry and the associated radioactive waste inventories grow in the …

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An Introduction To The Winograd Discrete Fourier Transform, Janice S. Agnello Apr 1979

An Introduction To The Winograd Discrete Fourier Transform, Janice S. Agnello

Retrospective Theses and Dissertations

This paper illustrates Winograd's approach to computing the Discrete Fourier Transform (DFT). This new approach changes the DFT into a cyclic convolution of 2 sequences, and illustrates shortcuts for computing this cyclic convolution. This method is known to reduce the number of multiplies required to about 20% less than the number of multiplies used by the techniques of the Fast Fourier Transform. Three approaches are discussed, one for prime numbers, one for products of primes, and lastly one for powers of odd primes. For powers of 2 Winograd's algorithm is, in general, inefficient and best if it is not used. …

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A Heuristic Approach For The Scheduling Of Technical Training Courses In The U.S. Navy, William H. Lindahl Apr 1979

A Heuristic Approach For The Scheduling Of Technical Training Courses In The U.S. Navy, William H. Lindahl

Retrospective Theses and Dissertations

The generation and maintenance of feasible schedules for Navy training courses are labor intensive throughout the Naval Education and Training Command. The major constraints affecting this scheduling are planned input requirements and the suitability/availability of instructors, equipment, and facilities. An additional constraint is that schedules must be established for the current year, updated and revised as necessary, and projected for the out-year planning requirements of the 5-Year Defense Plan. This thesis documents the essential components of scheduling for training at a representative training center, the Fleet Anti-Submarine Warfare Training Center, Pacific. It provides details for the automation of the current …

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Scrubber Design For Phosphoric Acid Production Facility, Edward E. Mayer Apr 1979

Scrubber Design For Phosphoric Acid Production Facility, Edward E. Mayer

Retrospective Theses and Dissertations

This report is an examination of the practical design of a phosphoric acid production facility wet scrubber. It includes a brief background of the Florida Phosphate Industry, in addition to the rules and regulations affecting the emission of fluoride contaminates. The theoretical aspects of a packed absorption tower is discussed prior to the actual design of a cross-flow wet scrubber of the type typically found in the Florida Phosphate Industry.

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An Application Of A Single Chip Slave Microcomputer As An Intelligent Interface, Thomas J. Riordan Apr 1979

An Application Of A Single Chip Slave Microcomputer As An Intelligent Interface, Thomas J. Riordan

Retrospective Theses and Dissertations

This thesis describes the operation of an intelligent controller existing between a computer system and a peripheral. The intelligent controller is implemented with an INTEL universal peripheral interface, UPI-41, single chip slave microcomputer. The interfaces between the controller and the computer system, and the controller and the peripheral are described in detail, as are the firmware and internal facilities of the controller itself. An evaluation of system operation is presented and, finally, the organizational philosophy of the system is discussed. Located within the appendices are a system schematic and listing of the controller program.

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Heavy Metals In The Water And Wastewater Systems Of The University Of Central Florida, William Keith Mccully Apr 1979

Heavy Metals In The Water And Wastewater Systems Of The University Of Central Florida, William Keith Mccully

Retrospective Theses and Dissertations

In large enough quantities, heavy metals may be detrimental to human health. Metals in raw water may pass through a water treatment plant without being completely removed. Once in a the distribution system, the water may experience metal pick-up due to corrosion. During the course of this study, an attempt was made to determine the heavy metal concentrations in the University of Central Florida's potable water systems. Samples were fun on the plasma spectrophotometer, Spectraspan III, and analyzed for heavy metal content. The results indicate pick-up of Fe, Al, Cu, and Zn in the distribution system. The arsenic and lead …

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Validation Of A Transient Simulation Program (Trnsys), Brian F. Goldiez Apr 1979

Validation Of A Transient Simulation Program (Trnsys), Brian F. Goldiez

Retrospective Theses and Dissertations

Although a Transient Simulation Program (TRNSYS) has become a widely used model for simulating a solar energy system, there has not been extensive work done in validating this model with actual data. The approach used to validate this model consisted of a modular buildup of components with validation for each module. Extreme care was taken in choosing the necessary parameters to model each component. Where parameters were not given, they were either derived or reasonable values were selected based upon general conditions prevailing in Central Florida or conditions which are generally true for certain solar hot water systems. The intent …

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Treatment And Disposal Of Hazardous Wastes In The East Central Florida Region, Tracey Bell Jan 1979

Treatment And Disposal Of Hazardous Wastes In The East Central Florida Region, Tracey Bell

Retrospective Theses and Dissertations

Although the East Central Florida area is not heavily industrialized, its dependence on groundwater resources makes it especially vulnerable to contamination by poor waste disposal practices. The East Central Florida area was studied to discover the nature and disposal of hazardous wastes generated. It was found that a large portion of hazardous wastes in the region were from very small industries, distributors, and even consumers. Three of the most toxic and/or voluminous waste problems in the area--metal plating wastes, pesticide wastes, and hospital wastes--were studied to determine available alternatives for disposal and their costs.

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Accelerated Flight Test Data As A Basis For Forecasting Logistical Requirements Of Military Aircraft, Charles James White Jan 1979

Accelerated Flight Test Data As A Basis For Forecasting Logistical Requirements Of Military Aircraft, Charles James White

Retrospective Theses and Dissertations

The initial forecasting of logistical support for new types of military aircraft is a perplexing problem. The objective of this research was to investigate the feasibility of using data generated by the accelerated flight tests as a basis for forecasting the logistical field requirements. The data used in the study were obtained from the U.S. Army Aviation Board, Fort Rucker, Alabama, where performance tests are conducted on all new aircraft to determine their suitability for Army use. It was statistically shown that the use of these data could provide more realistic logistical forecasts earlier in the introductory phase of the …

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Application Of Optimization Techniques To The Optical Design Of A Laser Seeker, David William Allemeier Jan 1979

Application Of Optimization Techniques To The Optical Design Of A Laser Seeker, David William Allemeier

Retrospective Theses and Dissertations

This report describes the development of a computer model for the design of a laser seeker optical system. A laser seeker is a device that detects pulsed laser energy. The computer model is configured to design the seeker optics based on the following performance criteria: Sensitivity to laser energy, which can be related to target acquisition range; optical field of view; and seeker optics cross section area. The design is defined by four variables and a set of fixed parameters, and is configured using computer optimization with both a direct search and a random search being used. A superior design …

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Elimination Of Nematodes From The Soil By Microwave And Dry Heat, Behrouz Abbassi Jan 1979

Elimination Of Nematodes From The Soil By Microwave And Dry Heat, Behrouz Abbassi

Retrospective Theses and Dissertations

No abstract provided.

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Digital Architecture For A Computer Based Imaging System, John Osborn Mcintosh Jan 1979

Digital Architecture For A Computer Based Imaging System, John Osborn Mcintosh

Retrospective Theses and Dissertations

There is a great need for a graphic simulation system used as a training device to take the place of actual flying. A good system will greatly reduce the cost of training men as well as cut down on casualties. Several systems have been tried and are now in use. Among them are two that are worthy of more study. These are the CCTV or model board and the digital systems. Both have several disadvantages that create a need for a new system. One such system is an optically based digitally processes system that combines the best features of two …

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Wastewater Pretreatment System For A Printed Circuit Board Plant, Raymond F. Green Jan 1979

Wastewater Pretreatment System For A Printed Circuit Board Plant, Raymond F. Green

Retrospective Theses and Dissertations

The wastewater from the electroplating processes required for the production of printed circuit boards has a high heavy metal content. The regulatory agencies of both the Federal Government and the State of Florida set pretreatment limitations on the quantity of the hazardous heavy metal ions that may be discharged t o a receiving body of water or to a Publicly Owned Treatment Works. A number of treatment processes are available for the effective removal of these pollutants. The mechanism behind the more common processes are discussed in this paper. Many variables must be considered in the design of a wastewater …

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