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Articles 4381 - 4410 of 4566

Full-Text Articles in Engineering

Work Sampling And Methods Improvements In Shipment Preparation, Michael P. Mccann Jan 1976

Work Sampling And Methods Improvements In Shipment Preparation, Michael P. Mccann

Retrospective Theses and Dissertations

A study was undertaken in the Shipping Center of Rohm and Haas Chemical Company in Philadelphia, Pennsylvania to determine what course of action should be taken to reduce overall costs in a labor oriented shipment preparation operation. This activity, which currently utilizes a complement of twenty-seven people, involves the preshipment labelling and stenciling of product and customer information to metal drums and pails plus various other preparation requirements. A work sampling was performed to determine manpower requirements by work category and this information was used to direct the methods improvements study into the most lucrative areas. By transferring the responsibility …

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A Comparison Of A Gasp And A Gpss Simulation Of An Avl Operational System, Barry Walden Dupuis Jan 1976

A Comparison Of A Gasp And A Gpss Simulation Of An Avl Operational System, Barry Walden Dupuis

Retrospective Theses and Dissertations

The purpose of this research report is to compare two simulation languages; GASP and GPSS. An economical comparison was performed by simulating the same system in each language and examine parameters such as run time, core size, program time, and debug time. A statistical comparison of the results of the system simulation was also performed using a 90% confidence level testing procedure. The system simulated was the proposed Orlando Police Department Automatic Vehicle Locator (AVL) Operational System.

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Techniques For Determination Of Complex Permittivity Of Dielectric Materials At Microwave Frequencies, Witold J. Trett Jan 1976

Techniques For Determination Of Complex Permittivity Of Dielectric Materials At Microwave Frequencies, Witold J. Trett

Retrospective Theses and Dissertations

No abstract provided.

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Solid Waste Resource Recovery Plan For Dekalb County Georgia, Ivan Ray Dory Jan 1976

Solid Waste Resource Recovery Plan For Dekalb County Georgia, Ivan Ray Dory

Retrospective Theses and Dissertations

A study was made of the feasibility of implementing a system of Resource Recovery from the solid wastes of an urban county in Georgia. A review was made of the existing solid waste management practices and present generation rates. A projection of future waste quantities and composition was made. A review of the present state of the art of recovering resources from solid waste was made to determine what systems could be developed for the County. An analysis of the estimated costs during a test year for three alternative systems for disposal was made to determine a least cost alternative. …

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An Interactive Income Tax Preparation System, Karen W. Ehlert Jan 1976

An Interactive Income Tax Preparation System, Karen W. Ehlert

Retrospective Theses and Dissertations

The system described in this research report computes 1975 Federal income tax for those who itemize deductions. The system user calls the program, written in FORTRAN IV, from a computer terminal, and then types answers to questions asked by the program. The user is given the opportunity to make corrections in the answers, and then the system calculates and prints out information necessary the complete IRS Form 1040 and Schedule A. The paper contains a description of the system, and explanation of the program, recommendations for future revision, and suggestions for expansion of the system. Four appendices contain IRS Form …

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Implementing Multiple-Linked Lists In The Minicomputer-Microcomputer String Processor, C. String, John H. Firestone Jan 1976

Implementing Multiple-Linked Lists In The Minicomputer-Microcomputer String Processor, C. String, John H. Firestone

Retrospective Theses and Dissertations

The report will demonstrate how to implement a basic linked-list data structure in RAM for C. STRING. The result of this implementation is Memory Allocation or Data Management which obtains or releases memory space as required in C. STRING. The basic concepts of data structures such as strings, lists and stacks are discussed and the algorithm for allocation of space is developed. The C. STRING user language TOSCL, and the TOSCL parse algorithm with Data Management is described. Finally, the INTEL's Schottky Bipolar LSI microprocessor is microcoded to implement Data Management.

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Energy Resource Allocation Optimization--A Linear Programming Model, Paul F. Hutchins Jan 1976

Energy Resource Allocation Optimization--A Linear Programming Model, Paul F. Hutchins

Retrospective Theses and Dissertations

A linear programming model has been developed for a Central Energy Plant which minimizes operational costs for a system involving the generation of chilled water and high temperature hot water plus the generation and/or purchase of electric power with equipment using natural gas or fuel oil energy. The fundamental concepts developed herein are sufficient for the analysis of any combination of energy supplies, demands, and energy conversion equipment. Utilization of this model is demonstrated with a case study and computer program results for high and low temperature environments. The linear programming model approach establishes a well-defined framework for the analysis …

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Seminole County, Florida Solid Waste Management Plan, Paul A. Magnant Jan 1976

Seminole County, Florida Solid Waste Management Plan, Paul A. Magnant

Retrospective Theses and Dissertations

The Seminole County, Florida solid waste transportation network was examined to determine alternate locations of transfer stations. The scope of this study is limited to transportation and assumed disposal costs. Collection costs are not included. Review of past generation records was conducted and a per capita generation rate of 4 lbs/day was determined. This compared favorably to a 4.06 lbs/day for Orange and Brevard County. The cost per ton for the present solid waste management system was computed and compared to alternative systems. The present system was compared to several alternatives by altering the number and changing the locations of …

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Analytical And Experimental Investigation Of Pumped Solar Hot Water Systems, Jeffrey B. Pearce Jan 1976

Analytical And Experimental Investigation Of Pumped Solar Hot Water Systems, Jeffrey B. Pearce

Retrospective Theses and Dissertations

A transient computer model of a forced circulation solar hot water system has been developed. The model allows for capacitance effects by solving the energy balances on a four node model of the solar collector. The tank model is designed to include the presence of an auxiliary heater and to allow for the nonideal condition of load drawoff. Five tests were done to validate the computer model. These tests include a comparison of the computer simulation with experimental data and a model available in the literature. The results of these tests indicate that the computer model is able to predict …

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Plotting Frequency Response With The Hybrid Computer, David Kenneth Swartwood Jan 1976

Plotting Frequency Response With The Hybrid Computer, David Kenneth Swartwood

Retrospective Theses and Dissertations

This paper describes a hybrid computer microprogram which plots frequency domain responses for linear systems. The microprogram computes the real and imaginary parts of the system output and displays either Bode or Nyquist plots. Various approaches are discussed and a detailed explanation of the one selected is presented. The major areas of discussion are the sinewave generator, the computation of real and imaginary parts of the system output, the logarithm computation and the digital control logic. The conclusion give s comparison of a Nyquist plot made with the microprogram with one calculated by a digital computer. Possible improvements for the …

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Evaluation And Use Of Dynamic Analysis Capabilities Of Ices Strudl Ii, Hugh M. Roberts Jan 1976

Evaluation And Use Of Dynamic Analysis Capabilities Of Ices Strudl Ii, Hugh M. Roberts

Retrospective Theses and Dissertations

No abstract provided.

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A Computer Graphics Analysis Of A Freeway Merge Control System, Thomas Alan Risher Jan 1976

A Computer Graphics Analysis Of A Freeway Merge Control System, Thomas Alan Risher

Retrospective Theses and Dissertations

In 1975, C.S. Bauer completed a doctoral dissertation at the University of Florida which treated the Green Band Merging Control System on I-75 in Tampa, Florida. In this work, Bauer suggested the possibility for the use of computer graphics as a toll for analysis of the bands generated by the Green Band Control System Simulation developed in his dissertation. The use of computer generated movies of the bands displayed to ramp drivers by the system allows the comparison of various band control strategies without the need for field implementation and testing. With the goal of producing such films in mind, …

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The Effect Of Sweep Rates On Linear Polarization Resistance Measurements, Ronald S. Tulino Jan 1976

The Effect Of Sweep Rates On Linear Polarization Resistance Measurements, Ronald S. Tulino

Retrospective Theses and Dissertations

A study of Linear Polarizations Resistance Measurements for silver metal immersed in a solution of AgNO3 and HNO3 to determine the effect of varying potential sweep rates has been made. Results indicate that for the system under investigation the Polarization Resistance is a non-linear function of potential sweep rate.

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Computer Analysis Of The Flow Of A Dissociating Gas Through A Porous Matrix, David P. Lippy Jan 1976

Computer Analysis Of The Flow Of A Dissociating Gas Through A Porous Matrix, David P. Lippy

Retrospective Theses and Dissertations

A computer model has been developed to analyze the flow of a dissociating gas through a porous metal matrix. The program predicts the transient temperature distributions through the coolant gas and matrix along with the pressure distribution and mass flow rate. The differential equations used in developing the program are documented in the literature of represent logical extensions of documented equations. The derivation of the finite difference equations is presented. Comparisons of experimental data with computer predictions are shown and indicate that the predictions fall within the experimental error in the data. A source listing of the computer program is …

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A Simulator For The Motorola M6800 Microprocessor, Carolyn Elizabeth Jordan Jan 1976

A Simulator For The Motorola M6800 Microprocessor, Carolyn Elizabeth Jordan

Retrospective Theses and Dissertations

The Motorola Company has developed a microprocessor called the M6800 Microprocessor. While the microprocessor is being configured, it is general practice to develop the software at the same time. This is where simulation of the proposed hardware operation can become very important to the success of the design effort. The simulator duplicates the microprocessor execution of machine language instructions on another computer. The simulator discussed in this paper is denoted the SIM6800. The purpose of this paper is to describe the structure, coding, and execution of the SIM6800 simulator. A User's Guide and sample program have been included.

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A Differential Sample And Hold Technique That Rejects Offset Voltages, John Adams Davis Jan 1976

A Differential Sample And Hold Technique That Rejects Offset Voltages, John Adams Davis

Retrospective Theses and Dissertations

This research report discussed modern sample and hold theory and techniques and then uses them to develop a new differential sampling concept to solve a real engineering problem, involving the synchronous demodulation of three amplitude modulated direction cosine signals in an unusual noise environment. The problem is discussed in detail and a detailed circuit design solution given. Additionally, the results of a breadboard test of the concept is given that shows the circuit to have a 60dB offset voltage rejection ratio.

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A Survey Of Weapon System Cost Effectiveness Methodologies, John T. Fritz Jan 1976

A Survey Of Weapon System Cost Effectiveness Methodologies, John T. Fritz

Retrospective Theses and Dissertations

A survey of cost effectiveness methodologies used in the defense industry is presented and an application of cost effectiveness is developed. A breakdown in the level of the decisionmaking is made and follows the example of the Weapon System Effectiveness Industry Advisory Committee. Examples of cost effectiveness methodologies at each decisionmaking level are shown.

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Mass Loadings Of Selected Water Quality Parameters For The State Of Florida, Charles D. Miller Jan 1976

Mass Loadings Of Selected Water Quality Parameters For The State Of Florida, Charles D. Miller

Retrospective Theses and Dissertations

The mass loadings of pollutants common in surface waters result from the discharges of many different sources. In the last few years it has been noted that nonpoint sources contribute more pollutants than point sources. This is because in many cases the point source discharges have been, by law, reduced drastically. In the State of Florida many water quality parameters were examined to estimate the mass loadings in streams related to, drainage area, average flow, land use, soil type and management practices. A total of sixteen streams were examined. The information was first calculated for mass loadings as a function …

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Multicoupled Bandpass Filter Design Using A Multiple Feedback Configuration, Robert J. Martin Jan 1976

Multicoupled Bandpass Filter Design Using A Multiple Feedback Configuration, Robert J. Martin

Retrospective Theses and Dissertations

In this paper, two methods for the design of active analog feedback bandpass filter pairs are examined. A third method is presented that does not use extra amplifiers for summation nor multicoupling. This third method uses identical bandpass amplifies and employs resistor summing to provide multicoupling. The name of this configuration is the "Dual Amplifier Bandpass Filter Employing Resistor Summing" (DABFERS). This configuration is economically attractive, has low sensitivity and better phase lag characteristics. In addition, third order prototypes are examined and a solution method for higher order prototypes is suggested.

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Investigation Of The Pulse Operation Wavelength Characteristics Of Infrared Emitting Diodes, Anton G. Kuhn Jan 1976

Investigation Of The Pulse Operation Wavelength Characteristics Of Infrared Emitting Diodes, Anton G. Kuhn

Retrospective Theses and Dissertations

No abstract provided.

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Individual Residential Wastewater Treatment, Robert H. Mcneal Jan 1976

Individual Residential Wastewater Treatment, Robert H. Mcneal

Retrospective Theses and Dissertations

No abstract provided.

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Application Of Solar Energy To The Solvent Reclamation Industry, Arthur H. Litka Jan 1976

Application Of Solar Energy To The Solvent Reclamation Industry, Arthur H. Litka

Retrospective Theses and Dissertations

An analysis of an operational industrial acetone reclamation system is performed to ascertain the possibility of its adaptation of solar thermal energy augmentation using fixed orientation, flat plate solar collectors. Currently, the system utilizes and oil fired heater for the thermal input. The water is heated to 185°F (85°C) and circulated through a heat exchanger which is immersed within the contaminated acetone solution. The solvent is thereby vaporized, condensed, and drawn off for reuse. Analytical models of two possible configurations utilizing a series of commercially available, flat plate solar collectors, a hot water storage tank, and an oil fired auxiliary …

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Design And Development Methods For Project Mis, William F. Morwood Jan 1976

Design And Development Methods For Project Mis, William F. Morwood

Retrospective Theses and Dissertations

No abstract provided.

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System Safety In Rail Transportation, Quave Norvell Smith Jan 1976

System Safety In Rail Transportation, Quave Norvell Smith

Retrospective Theses and Dissertations

This thesis "System Safety in Rail Transportation," is addressed to an individual having a basic technical background but little or no experience in this field. The thesis discusses the need for and the benefits to be obtained by using system safety techniques and principles in the railroad industry. Examples of typical railroad accidents are reviewed, and it is pointed out that analysis of the hazards in the railroad industry prior to the accidents would have identified problems which eventually resulted in the accidents. The system safety approach, which was developed for use in the aerospace and aviation fields, has proved …

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Energy Resource Allocation Optimization: A Mixed Integer Programming Fixed Charge Model, Mashaallah Khorsandi Jan 1976

Energy Resource Allocation Optimization: A Mixed Integer Programming Fixed Charge Model, Mashaallah Khorsandi

Retrospective Theses and Dissertations

A fixed charge model has been developed for a case study of a total energy power plant involving energy demands for chilled water, high temperature hot water, and electrical power. Using a FORTRAN computer program, which employs the Land and Doig branch and bound algorithm, the system model is solved for different sets of system demands for multiple energy users, and the following set of information is obtained to guide the decisions of operations personnel: 1. Recommend on/off status for each piece of equipment in the system. 2. Recommended rate of operation for each piece of machinery. 3. Required amounts …

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A Computer Simulation Of A Weapons Fire Simulator Modeled By Sceptre As An Optical Communication Channel, John James Cormack Jan 1976

A Computer Simulation Of A Weapons Fire Simulator Modeled By Sceptre As An Optical Communication Channel, John James Cormack

Retrospective Theses and Dissertations

This paper presents a method of simulating various noise sources in a Weapons Fire Simulator System which has been modeled as an Optical Communication Channel. This Weapons Fire Simulator System is composed of laser transmitters mounted on weapons that fire blank cartridges, and laser receivers mounted on targets. The laser transmitter sends out 'kill' beam pulses to the target whenever blank cartridges are fired. Detection of these pulses at the target signifies a 'hit'. The entire system along with the optical communication channel is simulated in a general purpose computer program called SCEPTRE. This analysis package is an efficient means …

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Analytical And Experimental Investigation Of Thermosyphon Solar Hot Water Systems, William E. Clark Jan 1976

Analytical And Experimental Investigation Of Thermosyphon Solar Hot Water Systems, William E. Clark

Retrospective Theses and Dissertations

A computer simulation of a thermosyphon system allowing load drawoff and non-ideal weather conditions has been developed. The model is restricted to the more common single cover, flat plate collector system. Using an analysis based on the present literature, this model calculates the energy absorbed by the collector, the temperature distribution through the system, and the corresponding flow rate. Experimental data for a non-ideal day is compared to the computer simulation. Results of this comparison indicate that the desired parameters, flow rate, collector inlet and outlet temperatures, and the mean tank temperature can be predicted by this model to within …

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Torque-Speed Linearization Of A D.C. Servo System, Nicholas A. Mantello Jan 1976

Torque-Speed Linearization Of A D.C. Servo System, Nicholas A. Mantello

Retrospective Theses and Dissertations

In early 1973 Professor Fred O. Simons Jr., of Florida Technological University, suggested the topic for this research report. During control engineering discussions, it was proposed that a D.C. Shunt Motor could be constrained to perform in an idealized sense for the static case. The purpose of this report is to provide a reasonably comprehensive examination of a control which linearizes the torque-speed relationship of a dc servo system. The fundamental goal is to determine a control which linearizes the torque-speed output relation of a system, in which a dc shunt motor is under basic armature control. Consequently, the emphasis …

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A Diffraction Model For Prediction Of Radar Signal Attenuation By A Rocket Exhaust Plume, Douglas Harrison Sphar Jan 1976

A Diffraction Model For Prediction Of Radar Signal Attenuation By A Rocket Exhaust Plume, Douglas Harrison Sphar

Retrospective Theses and Dissertations

This report documents the development of a method of estimating the signal attenuation induced by a rocket exhaust plume. The method is applicable to the early system design phase of high energy solid propellant rockets that produce highly ionized exhaust plumes. The method is based on the premise that when a plume is highly ionized, observed signal levels can be explained by assuming the signal propagates around the plume. A simple diffraction at a straight edge model is developed and compared to measured data. The report also provides an overview of exhaust plume electromagnetics and surveys prediction techniques.

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A Comparative Study Of Forecasting Techniques For The Us Air Force Medical Material Management System, Phillip John Van Ess Jan 1976

A Comparative Study Of Forecasting Techniques For The Us Air Force Medical Material Management System, Phillip John Van Ess

Retrospective Theses and Dissertations

A computer simulation experiment was conducted to evaluate and compare five individual forecasting models across nine different demand patterns. The models were based on the Medical Materiel Management System used by the US Air Force hospitals. Results indicated the best model varied depending on the demand pattern, the safety stock level, the noise level of the demand pattern, and the measure of forecast error. Across all demand patterns, exponential smoothing and 12-month moving average were best for the short term forecast used by the system, regardless of noise level in the demand patterns. Analysis of models within a single demand …

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