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Articles 4231 - 4260 of 4566

Full-Text Articles in Engineering

Designing Six Variable Combination Logic Circuits With The Ti-59, Brian M. Ashford Jul 1981

Designing Six Variable Combination Logic Circuits With The Ti-59, Brian M. Ashford

Retrospective Theses and Dissertations

A program has been written for the Texas Instrument's TI-59 hand-held calculator implementing the Quine-McCluskey minimization method for logic circuit design. This program is contained on multiple magnetic cards and provides the user with the capability for combinational logic minimization of circuit design problems containing up to six variables.

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Analysis Of Structural Dynamic Characteristics Of An Explosion Driven Hydrodynamic Conical Shock Tube, Walter R. Sanders Jul 1981

Analysis Of Structural Dynamic Characteristics Of An Explosion Driven Hydrodynamic Conical Shock Tube, Walter R. Sanders

Retrospective Theses and Dissertations

Previous tests of an explosion driven hydrodynamic shock tube revealed peak pressure data significantly lower than values predicted from the semiempirical scaling laws. It was hypothesized that part of the deviation was due to error in determining shock wave parameters and part might be due to measurement error caused by mechanical vibration of the tube. This investigation was conducted in two parts. In the first part, shock wave parameters were determined using a digital computer and curve fitting techniques to analyze digitized shock wave data. The second part involved determining the frequency components of the shock wave data noise content …

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Digital Acoustic Tracking Analysis Program, George H. Ford Apr 1981

Digital Acoustic Tracking Analysis Program, George H. Ford

Retrospective Theses and Dissertations

The purpose of this report is to investigate the processing of tracking data for acoustic targets. The programs developed for two- and three- dimensional space calculate the target's position via "hyperbolic-fix" navigation (geometric) considerations using the Newton-Raphson algorithm. The computer programs and the tracking solution approach contained herein is based on knowledge of only the sensors' locations and the relative time-difference at which a target's referenced, singular, acoustic pressure wavefronts are received at the sensors. Omnidirectional sensors are found to be sufficient for the two-dimensional space tracking problem. However, it is found that the three-space problem required usage of directional …

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A Model For Assessing The Economic And Energy Savings Implications Of Cogeneration With Steam Turbines In Citrus Processing Plants, Harold L. Carpenter Apr 1981

A Model For Assessing The Economic And Energy Savings Implications Of Cogeneration With Steam Turbines In Citrus Processing Plants, Harold L. Carpenter

Retrospective Theses and Dissertations

A cogeneration system using a noncondensing steam turbine to simultaneously provide electricity and process steam to a citrus plant was modeled in order to assess the source energy savings and the economic implications with the employment of this type system under conditions of time varying plant energy demand. Average monthly energy demand data from on citrus plant was analyzed. It was determined that the important parameter, in addition to a minimum demand level, for assessing economic acceptability is the demand thermal to electric ratio. One set of steam conditions will not necessarily provide the maximum source energy savings and at …

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Comparative Study Of Inflation Techniques Currently Used In Engineering Economy Studies, Thinh P. Dong Apr 1981

Comparative Study Of Inflation Techniques Currently Used In Engineering Economy Studies, Thinh P. Dong

Retrospective Theses and Dissertations

Recent increases in inflation rates make it essential that inflation be considered and properly treated in engineering economic studies. This research report presents a survey to determine how practitioners of engineering economics are accounting for inflation in their studies. After looking at inflation in general, and defining it, this report identifies the major existing techniques of handling inflation. It then discusses each in terms of advantages and disadvantage in evaluating investment projects. Finally, the report recommends an appropriate technique, and presents a computer program which calculates the present worth based on this technique which permits the user to analyze the …

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Industrial Engineering Applications Using Microcomputers, Farid Guediri Apr 1981

Industrial Engineering Applications Using Microcomputers, Farid Guediri

Retrospective Theses and Dissertations

Five computer have been developed for practical use by Industrial Engineers in a production environment. The programs cover the areas of, forecasting, learning efficiency, production control, network analysis and optimum equipment replacement policies. Theory, complete program documentation and case example, for each program, are presented. Programs are written in an interactive Basic mode and have been tested on the Radio Shack TRS-8-0 and Apple II Plus systems.

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Analysis Of A Solar Collector In An Absorption Cycle Including A Pump Operated By Thermoelectric Cells, Stuart Jee-Fong Chen Apr 1981

Analysis Of A Solar Collector In An Absorption Cycle Including A Pump Operated By Thermoelectric Cells, Stuart Jee-Fong Chen

Retrospective Theses and Dissertations

A mathematical computer model has been developed for the prediction of the thermal performance of a flat-plate solar collector used as the generator for an absorption cycle cooling system. The system employs thermoelectric cells to power its pump. The exponential relationship between the auxiliary energy and the collector area is used to optimize the system. It is predicted that the system will become feasible when the fuel price is raised to four times the current value.

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Ground Access To The Orlando International Airport: Design And Evaluation Of Various Mass Transportation Alternatives, George S. Fan Apr 1981

Ground Access To The Orlando International Airport: Design And Evaluation Of Various Mass Transportation Alternatives, George S. Fan

Retrospective Theses and Dissertations

This research presents designs and evaluations of various mass transportation alternatives for reducing the problem of the ground access congestion in the Orlando International Airport. The alternatives considered in this research are conventional bus service, minibus service, express bus service, light rail transit service, rail rapid transit service, and monorail service. Details of the origin-destination studies for the present traffic are given. A discussion of the various mass transportation alternatives is provided, with provisions for future systems expansion. Three economic evaluation methods were used in this research for evaluation of various alternatives. According to the results of the economic analysis, …

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Project Network Scheduling With Limited Resources Using Heuristic Solution Techniques, Enrique J. Daboin Rojas Apr 1981

Project Network Scheduling With Limited Resources Using Heuristic Solution Techniques, Enrique J. Daboin Rojas

Retrospective Theses and Dissertations

Traditional critical path methods imply the assumption of unlimited availability of resources. Mathematical models and heuristic techniques are two alternatives that consider resource limitation to sequence the activities of a project. This research explores the consideration of project scheduling under resource constraints for the specific case of single resource, single project scheduling. A computer model called GENRES-II search model is developed using a modification of Brooks' algorithm to develop project schedules. The criteria used are various weighted combinations of ACTIM, ACTRES and ACTFOL. An improvement of GENRES-II solutions is obtained when the best set of GEN-II values is input to …

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Testing The Radio Shack Random Number Generator To Produce Uniform And Non-Uniform Random Numbers, Enrique Menendez Apr 1981

Testing The Radio Shack Random Number Generator To Produce Uniform And Non-Uniform Random Numbers, Enrique Menendez

Retrospective Theses and Dissertations

Random numbers are a basic part in a Simulation Model, and they are also used in random sampling. These techniques are employed by quality engineers in the successful execution of their jobs. The every-day use of random numbers, however, often leads to a sense of complacency in he mind of engineers toward the exacting requirements that should be satisfied by the random number process to generate a genuine random number. Microcomputers have become a common and powerful tool that helps managers and engineers in their simulation experiments by providing sequences of random numbers. This research presents a sequence of eight …

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Economics Of Residential Heat Recovery Units, Muhammad N. Redhwi Apr 1981

Economics Of Residential Heat Recovery Units, Muhammad N. Redhwi

Retrospective Theses and Dissertations

Determining residential airconditioning waste heat recovery system costs and savings is achieved using a computer program. A worksheet is designed to accept consumer data as an input to the program. The program features load and waste heat recovery calculations on a monthly basis. Economic criteria, including rate of return, present worth, and payback period are computed. Sensitivity of these criteria to fuel escalation and consumer discount rate is demonstrated. the program provides the user with both thermal analysis and economic analysis summary reports.

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An Experimental Comparison Of Cross Correlator Performances Based Upon Signal-To-Noise Ratios, Sunder G. Gopani Apr 1981

An Experimental Comparison Of Cross Correlator Performances Based Upon Signal-To-Noise Ratios, Sunder G. Gopani

Retrospective Theses and Dissertations

Three commonly employed types of cross correlators were designed using standardized components which closely simulate idealized elements in an effort to experimentally verify the theoretical analysis. These cross correlators are (1) the standard analog cross correlator which consists of bandpass filters, a multiplier and a postmultiplier lowpass filter, (2) the polarity coincidence correlator (PCC) which utilizes a hard clipper in each input channel, and (3) a modified type of PCC which features a hard clipper in only one of the input channels. Two different types of filters viz. (1) the seventh-order Butterworth lowpass filter, and (2) the five-pole Chebyshev lowpass …

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A Mini-Computer Based General Purpose Interactive Computer Graphics Software System, Victor M. Haddock Jan 1981

A Mini-Computer Based General Purpose Interactive Computer Graphics Software System, Victor M. Haddock

Retrospective Theses and Dissertations

This research paper presents the description of a Mini-Computer Based General Purpose Interactive Computer Graphics Software System; which has been installed at the University of Central Florida, College of Engineering PDP 11/34 computer system. This system is a simplified version of MOVIE.BYU. MOVIE.BYU is a General Purpose Interactive Computer Graphics Software System that requires a computer with a word length of at least 32-bits. The MOVIE.BYU system was developed at the Brigham Young University, Utah. Extensive modification was required in order to satisfy the PDP 11/34 FORTRAN IV compiler. In addition, the program routines have been overlayed in order to …

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Smada: Stormwater Management And Design Aid, Timothy M. Curran Oct 1980

Smada: Stormwater Management And Design Aid, Timothy M. Curran

Retrospective Theses and Dissertations

The Stormwater Management and Design Aid (SMADA) is a computer model formulated to assess stormwater runoff quantity and quality. Applicable theory is reviewed to introduce a discussion of the modeling methodology. A pre- vs. post-development design objective can be incorporated to evaluate runoff quantity and quality for single or multiple land use watershed. Detention and retention facilities are considered and conveyance systems for runoff transmission can be sized. Initial design assessments and consistent design review and evaluation are possible. SMADA is written in the BASIC language and is executed in the interactive mode. No computer cards are required and data …

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Plant Layout Technique Analysis For The U.S. Postal Service General Mail Facility, Howard Stillwell Oct 1980

Plant Layout Technique Analysis For The U.S. Postal Service General Mail Facility, Howard Stillwell

Retrospective Theses and Dissertations

The layout of the U.S. Postal Service General Mail Facility (GMF) workroom operation is an essential factor to the overall productivity of the mail processing activities. An efficient workroom layout will minimize the cost of transporting containerized mail between the various distribution operations. Any changes in distribution methods, increases or decreases in mail volumes, or the addition of mechanization must be analyzed by the GMF industrial engineer to determine what effect these changes have on the existing workroom layout. He must also be able to evaluate layout changes recommended by management and floor supervisors. The present methods available to the …

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A Cross Assembler For The M6800 Microprocessor, Donald J. Walsh Oct 1980

A Cross Assembler For The M6800 Microprocessor, Donald J. Walsh

Retrospective Theses and Dissertations

This research paper describes a cross assembler for the Motorola 6800 assembly language which was written in Fortran to run on the Digital Equipment Corporation PDP 11/34. The assembler provides an assembly listing on the CRT or Printer and an Object File. In addition, the assembler will check for errors during PASS 1 and also during PASS 2.

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An Investigation Of Fabric Filtration For The Removal Of Colloidal Turbidity From A Laboratory Water, David Brent Jansen Oct 1980

An Investigation Of Fabric Filtration For The Removal Of Colloidal Turbidity From A Laboratory Water, David Brent Jansen

Retrospective Theses and Dissertations

A kaolin in tapwater suspension was treated either with alum or one of two cationic polymers. The resulting suspension was filtered through various configurations of felt cloth filters. The kaolin suspension was adjusted to 100 JTU. Treatment by polymer consistently lowered the filtered effluent to less than 1 JTU. Jar tests were utilized to determine optimum coagulant dose for the tests. The formulation of a complete filter cake in the filter appeared to be the determining factor in the efficiency of water clarification by the filter. The literature lacked references to this concept as applied to water supply problems. The …

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The Effect Of Random Number Generators On Applications, Edwin G. Landauer Oct 1980

The Effect Of Random Number Generators On Applications, Edwin G. Landauer

Retrospective Theses and Dissertations

Several pseudorandom number generators are described and compared on the basis of cost of generation and length of period of the sequences that are produced. The major statistical tests, which are used to obtain a measure of randomness for the different generators are discussed and compared. Four pseudorandom number generators are programmed in GPSS and are used to generate interarrival and service times for an M/M/1 queuing system. The results of each of the trials are compared to the theoretical results which can be obtained from queuing theory.

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Adjustable Low Frequency Servo Compensation Using Operational Amplifiers, Charles P. Partin Oct 1980

Adjustable Low Frequency Servo Compensation Using Operational Amplifiers, Charles P. Partin

Retrospective Theses and Dissertations

This paper defines a variable transfer function that is used to compensate for low frequency structural resonances in a turret so that stabilization of a closed loop servo system can be achieved. Three circuits for implementing this compensation are presented. They are: the feedforward three amplifier biquad, the summing four amplifier biquad, and the single amplifier biquad with pole-zero cancellation. Design equations allowing the engineer to go directly from the given transfer function to the actual component values are developed for each circuit. A comparison of the final circuit designs is also presented.

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Implementation And Documentation Of Oracls (Optimal Regulator Algorithm For The Control Of Linear Systems) Software Package, Bahram Parvizi Oct 1980

Implementation And Documentation Of Oracls (Optimal Regulator Algorithm For The Control Of Linear Systems) Software Package, Bahram Parvizi

Retrospective Theses and Dissertations

The objective of this research is to mount a software package entitled Optimal Regulator Algorithms for the Control of Linear Systems (ORACLS), on a Control Data Corporation (CDC) Cyber 74 digital computer system at Florida State University so that is can be operated from the University of Central Florida. The software package contains 60 subroutines which can be used for the analysis and design of state variable feedback control alws for time-invariant linear systems. The procedure for using this package is documented. Several examples are presented to illustrate the capability ORACLS in both digital and continuous linear-quadratic-gaussian (LQG) controller design …

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Chemical Treatment Of Urban Stormwater Runoff By Settling Column Studies, Paul R. Moore Oct 1980

Chemical Treatment Of Urban Stormwater Runoff By Settling Column Studies, Paul R. Moore

Retrospective Theses and Dissertations

Lake Eola, in downtown Orlando, was the subject of extensive research to determine the impact of stormwater runoff to the lake and possible management alternatives. The focus of this research was stormwater treatment by chemical coagulation followed by detention. Phosphorus was the main parameter targeted for removal. Various chemical parameters were also evaluated included: TSS, VSS, NVSS, COD, TKN, NH3, TOC, TP, Ca, As, Cd, Cu, Cr, Ni, Mg, Zn, Fe, and Pb. The chemical coagulants used for this research included: alum, ferric chloride, and lime. The study involved settling column tests for the various treatment methods to determine stormwater …

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City Of Kissimmee Solid Waste Collection System, Larry W. Walter Oct 1980

City Of Kissimmee Solid Waste Collection System, Larry W. Walter

Retrospective Theses and Dissertations

Every year the average American throws out more and more garbage. In the next five years, it is projected to increase 20-25 percent. This garbage, termed solid waste, is stored, collected, hauled and disposed of in some manner. The objective of this report has been to evaluate the City of Kissimmee's one-man residential solid waste collection system. The study results indicated this generation rate of the City to be 3.28 pounds per person per day, or 29.1 pounds per home per pickup. The productivity equations developed from the City data did not compare well with the results of EPA. Also …

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The Effects Of Plain Sedimentation On The Quality Of Urban Stormwater Runoff From The Lake Eola Watershed, Victor Julius Godlewski Oct 1980

The Effects Of Plain Sedimentation On The Quality Of Urban Stormwater Runoff From The Lake Eola Watershed, Victor Julius Godlewski

Retrospective Theses and Dissertations

The settling characteristics of urban stormwater runoff emanating from the Lake Eola Watershed (Orlando, Florida) were evaluated through a series of 7 column studies. The percentage removal that occurred due to sedimentation was observed for various stormwater pollutants and constituents. These included the General Water Quality Parameters: Total Suspended Solids, Non-volatile Suspended Solids, Volatile Suspended Solids, Chemical Oxygen Demand, Total Kjeldahl Nitrogen, Ammonia Nitrogen, Total Organic Carbon, and Total Phosphorus. The metals parameters: Zinc, Cadmium, Arsenic, Nickel, Copper, Magnesium, Iron, Lead, Chromium and Calcium were also considered. The results of the settling analysis indicates that the quality of Lake Eola …

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A Real Time Microprocessor Based Digital Filter Implementation, Mark H. Shaver Oct 1980

A Real Time Microprocessor Based Digital Filter Implementation, Mark H. Shaver

Retrospective Theses and Dissertations

A major break-through in the real-time digital simulation of dynamic models has occurred with the introduction of the Intel 2920 digital signal processing chip. The problems and potentials for this new device are demonstrated by implementing an elliptic function digital low pass filter via the bilinear z-transform approach. The software implementation is presented. Debugging and software verification are accomplished via manufacturer's simulation software tools. The hardware performance is verified in the laboratory. The results of these efforts point to much promise for wide scale applications, however, problems associated with performance indicate early version chip problems.

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Optical Phase Modulation Utilizing Magnetoelastic Properties Of Metallic Glasses, Frank R. Trowbridge Oct 1980

Optical Phase Modulation Utilizing Magnetoelastic Properties Of Metallic Glasses, Frank R. Trowbridge

Retrospective Theses and Dissertations

Three different optical fiber phase modulators utilizing the magnetostrictive properties of the metallic glass alloy Fe74Co10B16 were constructed. By binding the optical fiber to the magnetostrictive metallic glass, the strain imparted to the metallic glass from the magnetic field is transferred to the optical fiber. The strain on the optical fiber shifts the phase of the light, which can be controlled indirectly by varying the current producing the magnetic field permeating the metallic glass. The performance of the modulators on the basis of optical phase shift as a function of bias magnetic field and optical phase shift as a function …

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Project Scheduling Under Constrained Resources, Mohammed Benameur Oct 1980

Project Scheduling Under Constrained Resources, Mohammed Benameur

Retrospective Theses and Dissertations

This report examines the widely acceptable Heuristic and Exact procedures for solving the problem of project scheduling and control under constrained resources. Heuristic approaches are more practical, however they depend on the type of the project as well as the resources involved. Exact procedures are illustrated using an Integer Linear Programming formulation of the problem, and also solving it using the Branch and Bound Technique. Impracticality of the exact methods stews from the fact that the computations expand to an unmanageable amount.

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Concepts In Passive Design #2: Devices For East And West Shading, Florida Solar Energy Center, Ross Mccluney Sep 1980

Concepts In Passive Design #2: Devices For East And West Shading, Florida Solar Energy Center, Ross Mccluney

FSEC Energy Research Center®

A major source of heat in buildings is direct solar radiation through east and west windows--welcome heat energy in cold weather, but a summertime problem. Since Florida has such a long cooling season and generally a short heating season, it is especially important to protect east and west walls, windows, and sliding glass doors from the summer sun while allowing adequate light to enter the building year-round. From a lighting standpoint, natural daylight is on the whole quite good but it can produce unwanted heat and visual glare if not properly controlled.

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Concepts In Passive Design #3 Passive Cooling Categorizations, Florida Solar Energy Center Sep 1980

Concepts In Passive Design #3 Passive Cooling Categorizations, Florida Solar Energy Center

FSEC Energy Research Center®

Editor's Note: While passive solar heating is relatively well evolved, passive cooling is only on the threshold of development, and many of its terms are new to the practicing professional. At the Fourth Annual Passive Cooling Conference this problem was addressed by William W. Holmes of the University of Nebraska with the presentation of a 10-point categorization of cooling techniques. We are indebted to Mr. Holmes for this contribution to the emerging field of passive cooling and present it here as a point of departure and working vocabulary for the design professional.

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Multiprocessor/Multicomputer Systems And Optimal Loading Techniques, Francis D. Adams Jul 1980

Multiprocessor/Multicomputer Systems And Optimal Loading Techniques, Francis D. Adams

Retrospective Theses and Dissertations

This report reviews the subject of multiprocessor/multicomputer systems and optimal loading techniques. This report covers: 1. The interrelationship of Multiprocessor/Multicomputer (Multiple Instruction Stream Multiple Data Stream, MIMD) systems and other architectures by presenting a categorization of computer architectures. 2. Comparison of Multiprocessor/Multicomputer (MIMD), versus Parallel Processor (Single Instruction stream Multiple Data stream, SIMD) systems. 3. Multiprocessor/Multicomputer problems, pitfalls and new goals. 4. Investigation of loading techniques by reviewing particular MIMD executive designs.

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A Computer Simulation Of The Operations Of A Spent Nuclear Fuel Receiving And Storage Station, Jeanna Lorene Barnard Jul 1980

A Computer Simulation Of The Operations Of A Spent Nuclear Fuel Receiving And Storage Station, Jeanna Lorene Barnard

Retrospective Theses and Dissertations

Spent nuclear fuel is received at a storage facility in heavily shielded casks transported by either rail or by truck. Once at the storage facility, the casks are inspected, emptied, decontaminated, and reshipped. Allied-General Nuclear Services' (AGNS) nuclear fuel reprocessing plant in Barnwell, South Carolina, is constructed but not yet licensed for spent nuclear fuel storage or reprocessing. Recently, however, AGNS was granted funds by the Department of Energy to prepare the necessary procedural and regulatory paperwork in order that the Fuel Receiving and Storage Station (FRSS) of the plant can be licensed by 1985. In this paper, the activities …

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