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Articles 1 - 30 of 47
Full-Text Articles in Engineering
Digital Image Processing Using Ntec Facilities, James F. Roesch
Digital Image Processing Using Ntec Facilities, James F. Roesch
Retrospective Theses and Dissertations
Digital image enhancement refers to the improvement of a given image for human interpretation. Digital image processing facilities are those in which hardware and software computing elements are combined in such a way as to enable the processing of digital images. This report describes the use of the Naval Training Equipment Center (NTEC) Computer Systems Laboratory computing facilities to enhance digital images. Described are two major hardware systems, the IKONAS RDS-3000 raster display graphics system and the VAX-11/780, and the digital image processing program (DIMPRP) written by the author. Digital image enhancement theory and practice are addressed through a discussion …
An Integrated Test Plan For An Advanced Very Large Scale Integrated Circuit Design Group, William S. Didden
An Integrated Test Plan For An Advanced Very Large Scale Integrated Circuit Design Group, William S. Didden
Retrospective Theses and Dissertations
VLSI testing poses a number of problems which includes the selection of test techniques, the determination of acceptable fault coverage levels, and test vector generation. Available device test techniques are examined and compared. Design rules should be employed to assure the design is testable. Logic simulation systems and available test utilities are compared. The various methods of test vector generation are also examined. The selection criteria for test techniques are identified. A table of proposed design rules is included. Testability measurement utilities can be used to statistically predict the test generation effort. Field reject rates and fault coverage are statistically …
A Robotic Vision System, Murat Draman
A Robotic Vision System, Murat Draman
Retrospective Theses and Dissertations
A survey was done to summarize the state of the art and the future directions in the robotic vision field, in the industrial applications and research areas. An assembly language program, "GETIT", was written to control a MC6800 microprocessor in gathering data from an analog-to-digital converter hooked up to a camera, to find the center of a white marble placed on a black surface, and to send the coordinates to a five axis robot. A VAL language program, "VISION!", was written to receive the coordinate data from the microprocessor and to direct the robot to the specified location, to pick …
Estimating Methods For Production Test Labor, Garry K. Stonebraker
Estimating Methods For Production Test Labor, Garry K. Stonebraker
Retrospective Theses and Dissertations
This report mentions some of the difficulties faced by labor estimators when predicting the labor necessary to produce complex weapon systems. Specific attention is focused on estimating the durations and frequencies of testing, troubleshooting, and retesting activities. Emphasis is placed on estimating in a logical manner while using factors based on subjective judgment.
Transformation Of Nitrogen In Highway Runoff Management Systems, Robert D. Tolbert
Transformation Of Nitrogen In Highway Runoff Management Systems, Robert D. Tolbert
Retrospective Theses and Dissertations
The operation and maintenance of highways contributes a variety of pollutants to surface and subsurface waters. Solids, heavy metals, nutrients, oil and grease, pesticides and bacteria can all be associated with highway runoff. Although the full extent of the effect of all of these runoff constituents upon the quality of surrounding waters is not well defined, this study will mainly concentrate on nutrient contaminants (essentially nitrogen). The last decade has seen increasing efforts in research and development to abate contaminant discharges from highway runoff using a number of treatment facilities such as retention/detention basins, swales and wetland systems. An evaluation …
Geotechnical Investigation Of In-Lake Sediment Treatment For Megginnis Arm Of Lake Jackson, Tallahassee, Florida, Richard L. Johnson
Geotechnical Investigation Of In-Lake Sediment Treatment For Megginnis Arm Of Lake Jackson, Tallahassee, Florida, Richard L. Johnson
Retrospective Theses and Dissertations
Megginnis Arm of Lake Jackson in Tallahassee, Florida, has experienced rapid eutrophication as a result of development within the contributing area watershed. Bottom sediments were sampled for purposes of mapping, classifying and designating for removal. Sediment desiccation studies were performed to determine the percent of consolidation and sealing characteristics of the soils in the event of a lake drawdown. Restoration alternatives are presented and compared on the basis of field investigations, laboratory testing and analysis, and the desiccation study. Alternative methods are discussed with respect to the cost, the flexibility and the problems inherent in the different proposals. From the …
Using Simulation To Predict The Financial Effect Of Hospital Management Policies Under A Prospective Reimbursement, Timothy G. Atkins
Using Simulation To Predict The Financial Effect Of Hospital Management Policies Under A Prospective Reimbursement, Timothy G. Atkins
Retrospective Theses and Dissertations
Recent legislation by Medicare restricts its reimbursement per patient according to the patient's particular type of disease. The reimbursement is based on a set of Diagnosis Related Groups (DRG's), which categorizes patients into disease classifications. As a result, hospitals must make efficiency gains and managers must look for new ways to provide quality care while containing costs. A simulation technique was developed by which the financial results of particular administrative policies can be predicted. Patient billing data were collected over a three-month period and analyzed for the purpose of simulating length of stay and resource consumption per cost center. Regression …
The Development Of An Automated Production System, Brian M. Cardinal
The Development Of An Automated Production System, Brian M. Cardinal
Retrospective Theses and Dissertations
This paper describes the development of an automated production system recently completed by the Martin Marietta Aerospace Division, Orlando, Florida, for the assembly, inspection and test of printed circuit boards. The project began in January 1981 with the purpose of increasing the then existing production capability and to create the building block for the total automation of the printed circuit board assembly area of the plant in Ocala, Florida. The system was implemented using a combination of off the shelf equipment modified and integrated to create a single production system. The system employs much of the new production philosophies tailored …
The Design Of Standard Cell Vlsi Circuits, Randolph L. Abidin
The Design Of Standard Cell Vlsi Circuits, Randolph L. Abidin
Retrospective Theses and Dissertations
There are basically three methods of designing Very Large Scale Integrated (VLSI) circuits; Gate Array, Standard Cell, and Full Custom. The objective of this research is to design a VLSI circuit using the Standard Cell approach. A prime requisite for a successful design of these circuits is an integrated Computer Aided Design (CAD) system. The chip design requirements for an integrated CAD system are developed and their interrelationships are presented. As VLSI circuits grow in complexity, the problem of how to test them becomes more difficult. Two methods for testing are defined: 1. Insertion within the system of which the …
Computer Simulation Of Cross Correlators For Correlated Inputs, Linda J. Coulter
Computer Simulation Of Cross Correlators For Correlated Inputs, Linda J. Coulter
Retrospective Theses and Dissertations
Cross correlator systems, analog and clipped input channels, with correlated random narrow band Gaussian noise as inputs are computer simulated. The performance of each system is evaluated on the basis of the output signal-to-noise ratio. The output SNR of each system is compared with theoretical asymptotic approximations computed as a function of the SNR of the input channels. The output of the simulation compares within 3 dB of the asymptotic approximations for the analog correlator for all values of the correlation coefficient tested and for the systems with clipped input channels with uncorrelated inputs. For the systems with clipped input …
Analytical Investigation Of Performance Of A Solar Powered Free-Piston Stirling-Stirling Heat Pump Cooling An Insulated Enclosure, Gary D. Beckfeld
Analytical Investigation Of Performance Of A Solar Powered Free-Piston Stirling-Stirling Heat Pump Cooling An Insulated Enclosure, Gary D. Beckfeld
Retrospective Theses and Dissertations
An analytical investigation was attempted of a solar driven free-piston Stirling engine driving a second free-piston Stirling engine as a heat pump. A dynamic model and a thermodynamic model with free convection heat transfer were derived. The governing equations were programmed to obtain numerical solutions by computer. Graphs of piston displacements, volumes, pressures, mass cycles, and temperatures versus time are presented. Engine work output, operating frequencies, and efficiencies are calculated. Effects of parameter variations are presented. However, because proper phase angles could not be obtained for this model, the cooling performance of the system could not be evaluated. Limitations of …
A Model For Scattering In Dense Clouds, Richard A. Leblanc
A Model For Scattering In Dense Clouds, Richard A. Leblanc
Retrospective Theses and Dissertations
Lights is almost always detected by its interaction with matter. One of these interaction phenomena is the scattering of light by small particles. A model is developed that estimates the amount of energy that is scattered towards a detector from a beam given the locations of the source, detector and particle. This collection of particles is allowed to be very dense so that a photon scattered from the beam can be scattered several times before leaving the scattering medium. By considering the single-scatter component and multiple-scatter component separately, the model retains the characteristics of both types.
Analog Flight Simulators To Computer Interface, William J. Selph
Analog Flight Simulators To Computer Interface, William J. Selph
Retrospective Theses and Dissertations
The College of Engineering at the University of Central Florida has a flight simulator. This simulator was built as a stand-alone Instrument Flight Rules (IFR) training aid. The college has attempted on several occasions to augment this simulator system with a visual (out the cockpit view) simulation for the trainee pilot. Funding and resources have restricted or limited these enhancements to non real-time simulation. This project/thesis provides the university with part of the solution to accurate real time simulation. The simulated aircraft position and direction is acquired at 9 to 40 Hertz with 10-bit resolution. This data is made available …
An Application Of Speech Synthesis, Edward J. Purvis
An Application Of Speech Synthesis, Edward J. Purvis
Retrospective Theses and Dissertations
This paper discusses the implementation of a synthesized computer voice facility for a missile trainer. The actual facility hardware is described. Software used to control the hardware operation is presented and discussed.
Highway Runoff And Sediment Control, Susanna H. Rehmann-Koo
Highway Runoff And Sediment Control, Susanna H. Rehmann-Koo
Retrospective Theses and Dissertations
A literature survey was conducted on the erosion and sedimentation process and techniques for control. Erosion and sediment control techniques were found to be very site specific. Several techniques are analyzed for their maintenance and operation requirements, construction costs, and effectiveness in quantity and quality control. Once technique, namely swale blocks or berms was designed and constructed to illustrate cost and effectiveness. Design aids were developed for various berm heights and highway slopes as a function of berm spacing for typical highway cross-sections to aid in the design of swale blocks. Construction costs were estimated for the berms and retention/detention …
Transformation Of Phosphorus In Highway Runoff Management Systems, David B. Pearce
Transformation Of Phosphorus In Highway Runoff Management Systems, David B. Pearce
Retrospective Theses and Dissertations
The operation and maintenance of highways contributes a variety of pollutants to surface and subsurface waters. Solids, heavy metals, nutrients, oil and grease, pesticides and bacteria can all be associated with highway runoff. Although the full extent of the effect of all these runoff constituents upon the quality of surrounding waters is not well defined, this study will mainly concentrate on nutrient contaminants (essentially phosphorus). The last decade has seen increasing efforts in research and development to abate contaminant discharges from highway runoff using a number of treatment facilities such as swale and detention/retention ponds. An evaluation of the effectiveness …
A Single Fault-Tolerant Dual Channel Controller, Thomas J. Lowery
A Single Fault-Tolerant Dual Channel Controller, Thomas J. Lowery
Retrospective Theses and Dissertations
The advent of the VLSI technology makes it feasible to offer a once expensive system attribute called fault-tolerance to a wide variety of applications. This can be accomplished by using off-the-shelf single board computers and peripherals as the heart of the system. Custom design boards can then be added to meet the specific requirements of each application.
Pilot Study Of Applicability Of A Generic Microprocessor Assembly Language, Joseph H. Bartlett
Pilot Study Of Applicability Of A Generic Microprocessor Assembly Language, Joseph H. Bartlett
Retrospective Theses and Dissertations
The purpose of this investigation is to research the utility of a standardized generic microprocessor assembly language. More precisely, use of a generic language implementation on a given microprocessor and its effect on programmer productivity will be investigated. Programmer productivity will be scored in terms of an inverse function of the time taken to complete a programming task correctly. Shorter times imply better programmer productivity and longer times imply the opposite
Processing Of Thin Film Devices, Ramzi Delpak
Processing Of Thin Film Devices, Ramzi Delpak
Retrospective Theses and Dissertations
The ability to do thin film processing has been established at UCF. This paper describes the facilities available. RF and DC sputtering was used for material deposition. The parameters for both were established experimentally, and the results are presented. Resistor and capacitor test patterns were used to test the accuracy of the system. The devices were fabricated and tested; experimental results are discussed.
Investigation And Evaluation Of Random Number Generators For Digital Implementation, Ylberto V. Ruiz
Investigation And Evaluation Of Random Number Generators For Digital Implementation, Ylberto V. Ruiz
Retrospective Theses and Dissertations
The continuous improvement in the speed of digital components in conjunction with reduction of size has brought about a revolutionary age of microprocessors. Mathematical functions, which at one time could only be implemented by complex analog circuitry, can now be easily implemented via microprocessors and high density digital components. Principles of random number generation must be understood in order to implement pseudo-random algorithms in a digital random frequency generator (DRFG) design. Chapter 1 is a discussion of several types of random number algorithms which have been used in the past and outlines the deficiencies and advantages associated with each individual …
A Gate-Array Realization Of An Algorithm For Division, Salman Y. Abbasi
A Gate-Array Realization Of An Algorithm For Division, Salman Y. Abbasi
Retrospective Theses and Dissertations
A realization of a division algorithm suitable for high speed pipeline and realtime processors is presented. Implementation of the divide algorithm can be achieved by utilizing LSI / VLSI gate array technology. The divider performs precision, high speed 9 bit sign magnitude division. The design consist of combinational logic, where input and output data are latched into input and output registers. Data propagates through 16 divide stages. The n'th stage generates the n'th quotient bit upon receiving the updated dividend and controls from the previous stage. A simulation program is developed to verify the algorithm, and an analysis for speed …
Display To Camera Calibration Techniques, Philip Gatt
Display To Camera Calibration Techniques, Philip Gatt
Retrospective Theses and Dissertations
In today's technology, with digitally controlled optic sensing devices, there exists a need for a fast and accurate calibration procedure. Typical display devices and optic fiber bundles are plagued with inaccuracies. There are many sources of error such as delay, time constants, pixel distortion, pixel bleeding, and noise. The calibration procedure must measure these inaccuracies, and compute a set of correction factors. These correction factors are then used in real time to alter the command data, such that the intended pixels are correctly commanded. This paper discusses a calibration procedure, which employs a special matrix inverse algorithm. This algorithm, which …
Image Analysis And Segmentation Based On The Circular Pipeline Video Processor, Jon M. Albritton
Image Analysis And Segmentation Based On The Circular Pipeline Video Processor, Jon M. Albritton
Retrospective Theses and Dissertations
Visual inspection of printed circuit boards has generally depended on human inspectors. However, a system has been developed which allows for automated visual inspection using robotics and modern image processing techniques. This paper first introduces automatic visual inspection processes, overviews the Automatic Board Assembly, Inspection and Test (ABAIT) system, reviews image processing concepts and describes the Circular Pipeline Video Processor (CPVP). Image data from the CPVP is analyzed and an investigation into alternate segmentation algorithms to identify circuit board features is presented. The relative performance of these algorithms is compared conclusions drawn.
A Microcomputer Controlled Contouring Machine, Kripaker K. Punja
A Microcomputer Controlled Contouring Machine, Kripaker K. Punja
Retrospective Theses and Dissertations
An Apple microcomputer and a three axis milling machine are the basis for a CAD/CAM system with the capability of drilling and contour milling operations. The milling machine axes are driven by three stepper motors under the control of the Apple microcomputer and the ISAAC data acquisition module. An interactive part design program using high resolution color graphics has been developed. It employs lines, circles and points to define the geometry for the part. The design is entered at the CRT and stored as a CAM database on the user disc. Once the design is complete it is postprocessed and …
Stormwater Detention Systems With Effluent Filtration, Linda M. Van De Graaff
Stormwater Detention Systems With Effluent Filtration, Linda M. Van De Graaff
Retrospective Theses and Dissertations
The growing concern for water quality enhancement of our surface waters has led to changes in detention facility design. Providing a filter media for the effluent water to travel through before discharge into the environment has become an area of interest. Thus, detention facilities may be used for both water quality and quantity control. Different soil medias were studied for the potential of pollutant removal and infiltration rates usable in design work. Both laboratory and field experimentation were performed. A computer program was also developed to model stormwater movement through a swale detention system. This research was performed to examine …
Wastewater Characterization And Treatability For Aneastern Coal Slurry, Mark J. Flint
Wastewater Characterization And Treatability For Aneastern Coal Slurry, Mark J. Flint
Retrospective Theses and Dissertations
A complete wastewater characterization study was performed on an eastern Kentucky coal slurry after a 10-day circulation period in a 40 foot (12.2 m) pilot-scale pipeline. The resulting wastewater was settled and decanted for additional lime and alum treatability studies. Easter coal slurries were characterized by high TDS, conductivity, sulfates and iron. Significant concentrations of a number of trace metals were also found; however, organics were very low. Wastewater quality varied considerably among several experiments and was presumed to be influenced by different properties of the coal and the addition of a corrosion inhibitor. The major treatment concern was removal …
Graphic Display Of Geographic Spatial Data, Jill G. Ashby
Graphic Display Of Geographic Spatial Data, Jill G. Ashby
Retrospective Theses and Dissertations
This project developed computer graphics to display spatial and statistical data in a functional, appropriate and articulate manner. The spatial data creates mapping of Orange County focusing on traffic zones. The graphs display statistical data projecting from spatial areas presented in a simple form. The graphs produced by the system are geared towards an audience involved with transportation and planning decisions for Orange County. The graphics employ population, income, number of dwelling units, trip generation and trip production data based upon the 1980 census. The population, income, and number of dwelling unites statistics include predictions for 1985 through 2005 in …
A Non-Contact Technique For Direct Strain Measurement Using Laser Speckle Spectral Density, Reza M. Sheikhrezai
A Non-Contact Technique For Direct Strain Measurement Using Laser Speckle Spectral Density, Reza M. Sheikhrezai
Retrospective Theses and Dissertations
When an optically rough surface is illuminated by laser, a grainy pattern is produced at a distance away from the surface, which is known as laser speckle pattern. This pattern is random in intensity with its grains separated by an average amount controlled by the intermediate optical system or the diameter of the illuminated area of the surface in absence of an optical system. It has been shown that the grain spacing of such pattern may be correlated to yield a singly-peaked power spectral density of an intensity ensemble which is found by spatial ensemble averages. This correlation holds only …
Biotoxicity Of Highway Runoff Metals To Gambusia, John M. Bateman
Biotoxicity Of Highway Runoff Metals To Gambusia, John M. Bateman
Retrospective Theses and Dissertations
A research study was conducted to examine the relationship between speciation of heavy metals (Zn, Cd, Pb, Cu) and their biotoxicity. Therefore, static bioassay experiments were designed to determine LC-50 values for those metals on mosquitofish, Gambusia affinis. The standard bioassay scheme consisted of twelve 16-liter all-glass aquaria that provided duplicates of five different metal concentrations and a control for each run. Deionized tap water and filtered retention/detention water from Maitland Pond were used for bioassays. The effects of various physiochemical parameters such as pH, alkalinity, hardness and organic complexation on metal toxicity were determined. Also, synergistic and antagonistic effects …
A Comparison Of Two Techniques For Estimating The Travel Time Of An Acoustic Wavefront Between Two Receiving Sensors, Frank J. Montalbano
A Comparison Of Two Techniques For Estimating The Travel Time Of An Acoustic Wavefront Between Two Receiving Sensors, Frank J. Montalbano
Retrospective Theses and Dissertations
In recent years the United States Navy has concentrated most of its Anti-Submarine Warfare (ASW) research and development efforts toward passive sonar. Its ability to locate enemy targets without being detected gives the passive sonar system a supreme strategic advantage over its active counterpart. One aspect of passive sonar signal processing is the time delay estimation of an underwater acoustic wavefront. From this estimation the location and velocity of the radiating source (target) can then be determined. This report compares two popular methods of estimating time delay utilizing computer simulations of each: the cross correlator and the beamformer.