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Articles 1 - 30 of 44
Full-Text Articles in Engineering
Life Cycle Cost Model As Applied To Training Simulators, Frederick Adrian Davis
Life Cycle Cost Model As Applied To Training Simulators, Frederick Adrian Davis
Retrospective Theses and Dissertations
No abstract provided.
Thermal Control Of An Electronic Enclosure Utilizing A Vapor Chamber, Michael L. Dougherty
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.
Energy Resource Allocation Optimization: A Mixed Integer Programming Fixed Charge Model, Mashaallah Khorsandi
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 …
Analytical And Experimental Investigation Of Thermosyphon Solar Hot Water Systems, William E. Clark
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 …
Carbon Removal Of Organohalides In Drinking Water, William Ray Mccurley
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 …
An Interactive Income Tax Preparation System, Karen W. Ehlert
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 …
Individual Residential Wastewater Treatment, Robert H. Mcneal
Individual Residential Wastewater Treatment, Robert H. Mcneal
Retrospective Theses and Dissertations
No abstract provided.
Work Sampling And Methods Improvements In Shipment Preparation, Michael P. Mccann
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 …
Mass Loadings Of Selected Water Quality Parameters For The State Of Florida, Charles D. Miller
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 …
Plotting Frequency Response With The Hybrid Computer, David Kenneth Swartwood
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 …
Analytical And Experimental Investigation Of Pumped Solar Hot Water Systems, Jeffrey B. Pearce
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 …
A Comparative Study Of Forecasting Techniques For The Us Air Force Medical Material Management System, Phillip John Van Ess
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 …
Stormwater Infiltration Thru Sewer Lines In Brevard County, Florida, Robert Earl Stubbe
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 …
Factors In Modeling Floridan Aquifer Recharge, Harlan Alfred Hannah
Factors In Modeling Floridan Aquifer Recharge, Harlan Alfred Hannah
Retrospective Theses and Dissertations
No abstract provided.
Implementing Multiple-Linked Lists In The Minicomputer-Microcomputer String Processor, C. String, John H. Firestone
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.
A Survey Of Weapon System Cost Effectiveness Methodologies, John T. Fritz
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.
Investigation Of The Pulse Operation Wavelength Characteristics Of Infrared Emitting Diodes, Anton G. Kuhn
Investigation Of The Pulse Operation Wavelength Characteristics Of Infrared Emitting Diodes, Anton G. Kuhn
Retrospective Theses and Dissertations
No abstract provided.
Multicoupled Bandpass Filter Design Using A Multiple Feedback Configuration, Robert J. Martin
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.
Dynamic And Stability Characteristics Of An Articulated Frame Railway Passenger Truck, David Kenneth Platner
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 …
Evaluation And Use Of Dynamic Analysis Capabilities Of Ices Strudl Ii, Hugh M. Roberts
Evaluation And Use Of Dynamic Analysis Capabilities Of Ices Strudl Ii, Hugh M. Roberts
Retrospective Theses and Dissertations
No abstract provided.
The Effect Of Sweep Rates On Linear Polarization Resistance Measurements, Ronald S. Tulino
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.
A Differential Sample And Hold Technique That Rejects Offset Voltages, John Adams Davis
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.
A Simulator For The Motorola M6800 Microprocessor, Carolyn Elizabeth Jordan
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.
Application Of Solar Energy To The Solvent Reclamation Industry, Arthur H. Litka
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 …
Theory Of Eddy Currents For Nondestructive Testing, Craig Charles Biddle
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.
An Interactive Information System For Tracking Student Academic Progress And For Projecting Quarterly Course Enrollments, Marilyn Sellers Khorsandi
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 …
Design And Development Methods For Project Mis, William F. Morwood
Design And Development Methods For Project Mis, William F. Morwood
Retrospective Theses and Dissertations
No abstract provided.
A Diffraction Model For Prediction Of Radar Signal Attenuation By A Rocket Exhaust Plume, Douglas Harrison Sphar
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.
Development Of A Digitally Controlled Time Base Generator For Analog And Hybrid Computers, Judson Kenneth Bishop
Development Of A Digitally Controlled Time Base Generator For Analog And Hybrid Computers, Judson Kenneth Bishop
Retrospective Theses and Dissertations
No abstract provided.
A Computer Simulation Of A Weapons Fire Simulator Modeled By Sceptre As An Optical Communication Channel, John James Cormack
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 …