Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 30 of 43

Full-Text Articles in Entire DC Network

Effects Of High Altitude Jet Aircraft On The Stratosphere, Dennis K. Bushnell Jul 1973

Effects Of High Altitude Jet Aircraft On The Stratosphere, Dennis K. Bushnell

Retrospective Theses and Dissertations

This paper presents a review of the basic thermal, chemical and radiation balances existing in the atmosphere and discusses the mechanisms by which jet engine exhaust products can disturb these balances. Possible effects of stratospheric pollution on plant and animal life are discussed. Methods for reducing harmful emissions through engine design modifications are outlined and current successful research programs are surveyed. The SST type aircraft is shown to be a greater threat to the environment than conventional jets because of differences in cruise altitudes. It is concluded that due to the existence of several potential environmental problems associated with contamination …


Remote Sensing Of Earth Resources System Capabilities V.S. Design Constraints, William Howard Grisham Jul 1973

Remote Sensing Of Earth Resources System Capabilities V.S. Design Constraints, William Howard Grisham

Retrospective Theses and Dissertations

There is new evidence that global earth resources satellite net will be practical. This paper weighs recent advances in remote sensing to pinpoint the dominant constraints. The data and sensor systems interfacing requirements are critically reviewed. It is shown that conventional optics constraints can be relaxed, with the newer systems, based on multi-spectral imagery and statistical processing methods. The most powerful computational methods use algorithms based on a Gaussian assumption for the species vector in feature space, but biases in the imagery limit their efficiency. A rationale is proposed: improving the observational network calibrating efficiency will also improve the photogrammetric …


A State-Of-The-Art Application Of Computer Technology-Vending Computer Generated Games For Profit, Stanley M. Levin Apr 1973

A State-Of-The-Art Application Of Computer Technology-Vending Computer Generated Games For Profit, Stanley M. Levin

Retrospective Theses and Dissertations

The recent and rapid advances in micro electronics technology has resulted in the continued and dramatic reduction in the cost and size of logic circuits used in computers and computer interfaced devices. This technology now makes it possible to purchase a sophisticated computer system and multiple terminal devices for less than $60,000. The subject of this Research Report is to show the feasibility of applying this computer system, including 32 phone line interfaced video display terminals and a time sharing software package, to vend computer generated games for profit.


Budget, Availability, And Use As Variables For Applying Instructional Technology In Florida High Schools, Michael Walter Byers Jan 1973

Budget, Availability, And Use As Variables For Applying Instructional Technology In Florida High Schools, Michael Walter Byers

Retrospective Theses and Dissertations

No abstract provided.


Triggered Sweep Generators Using Modern Integrated Circuits, Arthur Russell Klinger Jan 1973

Triggered Sweep Generators Using Modern Integrated Circuits, Arthur Russell Klinger

Retrospective Theses and Dissertations

The oscilloscope is undoubtedly one of the most important tools in any electronics shop. Presently there are many relatively inexpensive oscilloscopes available, but triggered sweep capability is still reserved for those oscilloscopes costing more than 200 - 500 dollars. The goal of this project was to develop a respectably performing triggered sweep system at a low enough cost to allow inclusion of this valuable feature in any oscilloscope. Two of the most important specifications of an oscilloscope are the bandwidth of the vertical amplifier, and the maximum sweep frequency. The broad class of "inexpensive oscilloscope" would include those with a …


Parametric Studies Involving Community Noise Exposure Around Airports, Eldon T. Day Jan 1973

Parametric Studies Involving Community Noise Exposure Around Airports, Eldon T. Day

Retrospective Theses and Dissertations

This report uses a computer program to study the effects of the following parameters on noise exposure forecast contours: 1. Aircraft mix, 2. Aircraft track, 3. Number of operations, 4. Time of day and 5. Aircraft thrust.


Computer Solution Of Linear Programming Problems Using The Decomposition Algorithm, Walter Paul Kraslawsky Jan 1973

Computer Solution Of Linear Programming Problems Using The Decomposition Algorithm, Walter Paul Kraslawsky

Retrospective Theses and Dissertations

No abstract provided.


A Stormwater Overflow Control Device, Richard Duke Stalker Jan 1973

A Stormwater Overflow Control Device, Richard Duke Stalker

Retrospective Theses and Dissertations

On Lake Eola, stormwater runoff has been identified as a major source of pollution. Other lakes in Central Florida are experiencing similar decay due to stormwater runoff. A device has been examined for diversion of the initial flows to treatment before discharge into the lake. A graphical aid was developed to select the proper volume required for the device and was applied to a Lake Eola existing collection basin. A laboratory model was designed and constructed based on the scaled-down version of a collecting basin on Lake Eola. This model was used to demonstrate the concept, as well as, indicate …


A Solid State Vhf Single Sideband Transmitter, Ermi Roos Jan 1973

A Solid State Vhf Single Sideband Transmitter, Ermi Roos

Retrospective Theses and Dissertations

This research report investigates a unique method of generating single sideband power, which is particularly useful in transistorized transmitters operating at VHF frequencies. Radio frequency power id developed by class C amplifiers, rather than conventional class A or B amplifiers. Currently, VHF power transistors are not well adapted for use as linear amplifiers, and will function far better in the class C mode. A prototype VHF transmitter which develops single sideband power with nonlinear amplifiers was designed and constructed. The transmitter characteristics were measured and analyzed to establish the feasibility of the new design.


Investigation Of Sequential Machine Design Techniques For Implementation Of A Trac Scanning Algorithm, Raymond F. Cotton Jan 1973

Investigation Of Sequential Machine Design Techniques For Implementation Of A Trac Scanning Algorithm, Raymond F. Cotton

Retrospective Theses and Dissertations

This report will demonstrate the design techniques to translate a given scanning algorithm into a hardwired pre-processor. The language to be "pre-processed" is TRAC (Text Reckoning and Compiling) devised by Mooers and Deutsch. The major drawback in the current implementation of TRAC is speed. The software overhead required for string manipulations and execution of the input scanning algorithm is the major degrading factor. A TRAC machine consisting of a hardwired pre-processor to scan the input and produce formatted data for a stack oriented evaluator is proposed. The control machine for the input scanning algorithm for the pre-processor is designed using …


Written Versus Tape Recorded Presentation Of A Short Intelligence Test: Differences In Reliability And Validity, Dennis Roy Weller Jan 1973

Written Versus Tape Recorded Presentation Of A Short Intelligence Test: Differences In Reliability And Validity, Dennis Roy Weller

Retrospective Theses and Dissertations

No abstract provided.


Sex Discrimination In The Evaluation Of Leadership Behavior: Two Simulation Techniques, Jayne B. Drucker Jan 1973

Sex Discrimination In The Evaluation Of Leadership Behavior: Two Simulation Techniques, Jayne B. Drucker

Retrospective Theses and Dissertations

No abstract provided.


The Effects Of Training, Sex Of The Rater, And Contrast In The Evaluation Of Lgd Behavior, William Richard Garrett Jan 1973

The Effects Of Training, Sex Of The Rater, And Contrast In The Evaluation Of Lgd Behavior, William Richard Garrett

Retrospective Theses and Dissertations

No abstract provided.


A Study Of The Microwave Reflective Properties Of Aerosols, Paul Edward Speh Jan 1973

A Study Of The Microwave Reflective Properties Of Aerosols, Paul Edward Speh

Retrospective Theses and Dissertations

This thesis deals with the reflective properties of selected aerosols subjected to microwave radiation. The backscatter cross section of a sphere is developed analytically as a basis for experimental verification. The most pertinent material parameters necessary for maximum reflectivity are discussed and are used to justify the aerosols selected for the experiment. The experimental procedures and the equipment calibration techniques are prefaced by a discussion of the design and the construction of the aerosol chamber and the microwave source apparatus. The experimental results and the calculated backscatter cross section of the aerosols listed are examined. Conclusions are discussed and applications …


A Survey Of Medical Diagnostic Software, Steven Stein Jan 1973

A Survey Of Medical Diagnostic Software, Steven Stein

Retrospective Theses and Dissertations

The field of medical diagnostic software is reviewed to define its status in the medical profession. This is accomplished in a two-step procedure. The first step is a cross-section of literature on the topic, and the second step is a survey of physicians in a sample area. The cross-section of literature presents some of the more advanced studies which have been conducted on medical diagnostic software. Also presented is an explanation of the logic used in diagnostic software and the results of several test cases. The survey was of physicians in the Orlando, Florida area to define the actual application …


An Investigation Of High Anxiety Verbal Behavior, John W. Wright Jan 1973

An Investigation Of High Anxiety Verbal Behavior, John W. Wright

Retrospective Theses and Dissertations

No abstract provided.


Effects Of Various Logotype Structures On Advertising Content Retention, Richard H. Jack Jan 1973

Effects Of Various Logotype Structures On Advertising Content Retention, Richard H. Jack

Retrospective Theses and Dissertations

No abstract provided.


Development Of A Sixteen Line Multiplexer, James H. Stangel Jan 1973

Development Of A Sixteen Line Multiplexer, James H. Stangel

Retrospective Theses and Dissertations

This report explains the development of a telephone line multiplexer to be used with a computer based personal paging system. The large geographical area coverage made possible by computer processing results in many calls having to cross telephone tariff boundaries. Since system users cannot be expected to pay long distance charges, dedicated lines which cross tariff boundaries must be leased. Multiplexing applied to those leased lines reduces the cost of data transmission, and is, therefore, justified. The design of the multiplexer proceeds from a specification set which is derived from user response requirements. Fundamentally, the response consists in advising the …


Permeability Determination For Landfill Studies, Joel George Smith Jan 1973

Permeability Determination For Landfill Studies, Joel George Smith

Retrospective Theses and Dissertations

This report reviews the state of the art with respect to permeability determination and sanitary landfills. Characteristics of the soil which determine the permeability are given. Processes which can change the permeability are discussed. Darcy's Law, the mathematical basis of permeability and its validity are discussed. Laboratory and field methods for determining the permeability are also discussed. Applications of determined permeability for design and management of landfills are also indicated.


A Learning Machine For Job Sequencing In A General-Purpose Computer System, Richard Jon Taylor Jan 1973

A Learning Machine For Job Sequencing In A General-Purpose Computer System, Richard Jon Taylor

Retrospective Theses and Dissertations

No abstract provided.


Removal Of Color From Surface Water In Central Florida, Joseph R. Wanielista Jan 1973

Removal Of Color From Surface Water In Central Florida, Joseph R. Wanielista

Retrospective Theses and Dissertations

The USPHS limits color in water to 15 color units. However, it is desirable to remove all the color. Color in surface water is mainly due to humic substances and was found in concentrations varying up to 450 color units. Removal of color by coagulation and flocculation has been practiced over the years. The mechanisms involved have not yet been fully understood. During the course of this investigation, a literature survey, studying the nature of color, mechanisms or color removal, and optimum color removal conditions, has been conducted. Samples have been obtained from surface waters in Central Florida; namely Big …


The Application Of System Dynamics Techniques To War Game Modeling, G. Vincent Amico Jan 1973

The Application Of System Dynamics Techniques To War Game Modeling, G. Vincent Amico

Retrospective Theses and Dissertations

Military War Gaming has developed from the chess-like games to the elaborate computer simulations of today, using high-speed, general-purpose, digital computers. This Research Report will briefly review modern war-game developments with emphasis on real-time training systems. The application of system dynamics techniques developed by Jay W. Forrester to war-game modeling is explored. A simple destroyer versus submarine model is developed. Results indicate that the system dynamics modeling technique is a powerful and effective tool. However, the Dynamo language could be substantially improved by a more powerful logical statement capability.


A Nuclear Power Plant Simulator, John Jacob Adams Jan 1973

A Nuclear Power Plant Simulator, John Jacob Adams

Retrospective Theses and Dissertations

The United States' energy crisis, which has received so much publicity lately, has focused national attention on how we are to meet our energy demands. Proposed energy sources include conventional nuclear power plants, breeder reactor and fusion reactor plants, coal gasification, liquid hydrogen, solar energy, and geothermal energy. All of these except conventional fission plants are still on the drawing board or in the experimental laboratory, and are described briefly. Government and industry are betting heavily on conventional nuclear power plants. ($40 billion already spent by private utilities for 30 operating plants, 60 under construction, and 75 on order.) A …


An Experimental Study Of The Change In Speaker Confidence And Self-Esteem As A Function Of Speech Training And Initial Self-Esteem, Sharon Elizabeth Beasley Jan 1973

An Experimental Study Of The Change In Speaker Confidence And Self-Esteem As A Function Of Speech Training And Initial Self-Esteem, Sharon Elizabeth Beasley

Retrospective Theses and Dissertations

No abstract provided.


An Evaluation Of Water Softening, James Burr Aton Jan 1973

An Evaluation Of Water Softening, James Burr Aton

Retrospective Theses and Dissertations

Dynamic modeling is proposed in this paper as a method of developing a computer model to simulate a water softening treatment unit. Information on water softening economics and ion exchange are examined. The development of a dynamic model is oriented toward uniform effluent water quality and operational flexibility. Several methods are presented to determine the reaction rate used in the completely mixed flow reactor's dynamic model. Based on preliminary data the proposed dynamic model would calculate removal rate similar to those found in an existing plant.


Initial Flow Calibration Results From The Florida Technological University Four-Inch Supersonic Wind Tunnel, James K. Beck Jan 1973

Initial Flow Calibration Results From The Florida Technological University Four-Inch Supersonic Wind Tunnel, James K. Beck

Retrospective Theses and Dissertations

No abstract provided.


The Design Of A Digital Data Acquisition System For Jet Engine Testing, Robert Wesley Carter Jan 1973

The Design Of A Digital Data Acquisition System For Jet Engine Testing, Robert Wesley Carter

Retrospective Theses and Dissertations

This research report documents the various types of Data Acquisition Systems in use for testing jet aircraft engines. The cost trade offs and design considerations are explored for systems which employ a digital computer as the prime recording/processing element. The digital computer has revolutionized the data acquisition field, particularly in the testing of high performance jet engines. Test data can be acquired, processed, converted to engineering units, and out via high speed line printers and cathode ray tubes (CRT's). The data acquisition system operates on-line, and interleaves the random requests for data from multiple test cells by using a specially …


Accumulative Errors In Low-Level Mos-Fet Multiplexers, Lloyd Daniel Griffin Jan 1973

Accumulative Errors In Low-Level Mos-Fet Multiplexers, Lloyd Daniel Griffin

Retrospective Theses and Dissertations

This paper provides a brief historical discussion of the development of time division low level multiplexing techniques and especially emphasizes MOS-FET multiplexers currently being implemented. Error sources which may affect system accuracy and therefore must be considered in the design of the multiplexer are described. Some of the more significant of these errors: aliasing, interchannel crosstalk, static offset, transient coupled errors, and common-mode injected errors are analyzed and covered in detail. Equations expressing the overall interchannel DC crosstalk and static offset for a generalized multiplexer are derived and presented. Settling errors arising from transient events in time division multiplexers are …


The State-Space Approach To Network Synthesis, Gary Landis Hasty Jan 1973

The State-Space Approach To Network Synthesis, Gary Landis Hasty

Retrospective Theses and Dissertations

No abstract provided.


Comparative Methods-Simultaneous Solution Of Differential Equations, William Thomas Harris Jan 1973

Comparative Methods-Simultaneous Solution Of Differential Equations, William Thomas Harris

Retrospective Theses and Dissertations

No abstract provided.