Digital Commons Network^™

Computer Simulation For Studying The Performance Of Plasticating Extruders, K. S. Govindaraju

Theses

A Computer program for simulation of a single screw plasticating extruder is presented. The computer program simulates the performance of different size extruders with various screw geometries for plasticating and pumping different thermoplastic resins. The simulation yields valuable information on the performance of an extruder for a variety of operating conditions. The simulation program provides a means of separating the effect of one variable at a time on the overall performance of the extruders.

Tourist Development And Environmental Impact Of Future Airport Construction In Athens, Greece, Vasilios Michael Halkias

Theses

The present thesis is an overall study of the suitablility of the eastern region of the Attica Peninsula in Greece, for a Tourist Development. The future construction of the new International Airport of Athens within the region is a significant factor that has been taken into account for the study.

It also examines and projects the Environmental Impacts due to the Airport construction.

The description of the studied area is presented by maps and refers to the Environmental Inventory. This Inventory examines the Water Resources of the region, Topography, Land Uses, Transportation System, Air and Noise Quality, Archaeological Sites, Utilities, …

Intelligent Computer Decision Systems, Robert J. Heath

Theses

This paper demonstrates that the concepts developed through Artificial Intelligence research are applicable to computerized information systems; and that a system of expert problem solvers and natural language interfaces exhibiting characteristics of "intelligent behavior" offer several advantages over present-day, conventional database management designs. Development of the conclusion was accomplished after an analysis and assimilation of the current literature in the field of Artificial Intelligence and participation in university symposia concerning its application to the business environment. It is concluded that incorporating the notions of learning and creativity, common sense(heuristics), and self-awareness, intelligent computer decision systems will provide managers with : …

Recruiting Techniques To Detect Truth And Personality, Franklin Keith Howard

Theses

Organizations today increasingly rely upon new measures of detecting employee honesty. Such approachs including lie detectors, handwriting analysis, voice stress tests, have their supporters and detractors.

This thesis will specifically concentrate upon the phenomenon of lie detectors...its origin, application and evaluation.

This thesis covers reasons why employers use these techniques, controversial issues centered around their use, legal implications, and their outlook in the employment setting.

Modification Of A Heat Transfer Program (Stan5) To Account For Surface Roughness And Its Application To Aerodynamic Icing, Parthasarathy R. Iyengar

Theses

In order to be able to predict the local ice accretion rate or the icing profile on an airfoil, it is necessary that a suitable heat transfer coefficient model be availabIe. A computer program has been developed which is capable of predicting the local heat transfer coefficient for a typical two dimensional icing surface. Because of the charecteristics of an icing surface, an existing computer program (STAN5) has been modified to include the effects of the following surface roughness surface curvature and boundary layer transition.

The computer program for the heat transfer coefficient has then been used with an existing …

Decision Rules Applied To Spread Spectrum Signal Detection, Richard Jae Kim

Theses

Decision rules for detection of spread spectrum signals were investigated. For each decision rule, error and erasure probabilities were analyzed. The obtained data was used to plot PE vs Pe for constant signal-to-noise ratio (SNR). With the use of the probability of a word error curves the optimum threshold setting was found for a given SNR.

FSK (orthogonal signalling) and PSK (antipodal signalling) were considered for modulating the chips. When the PE vs Pe plots for FSK and PSK were compared, PSK performed better than FSK by a ratio of 6 dB.

Finally, analog and digital correlation of the received …

The Effects Of Feedback On Operator Performance In A Production Environment, Diane L. Knoll

Theses

The objective of this thesis and it's associated research is to analyze the positive effects of feedback in a production environment. The experimental data was collected at the Ortho Pharmaceutical Corporation in New Jersey and a subsidiary company, The J. T. Clark Company, in Illinois.

The experiments involved three types of feedback indirect feedback provided to a large group of packaging operators, direct feedback provided to a small group of temporary packaging operators in a training situation, and direct feedback provided to an entire workforce of operators performing dissimilar, but interrelated tasks.

The results of these experiments were consistent with …

Management Improvement Study Of The Engineering Function In A Converting Industry Company, James John Slovak

Theses

A study was made to determine if the profitability of a converting company could be improved by expanding its engineering department. Process challenges were examined along with the present engineering function to determine difficulties. A case study of capital budget projects completed in the last three years revealed that potential savings were lost due to late and incomplete projects. The conclusion is that profitability can De increased through process control improvements and more timely completion of capital projects by expanding the present engineering department.

Effects Of Two Chelating Drugs On Trace Element Metabolism In The Rat, Thomas J. Solecki

Theses

Numerous drugs have structures which suggest that they and/or their metabolites are likely to be chelating agents and therefore might affect trace element metabolism. For some drugs, their therapeutic activity or side effects may be due to this chelating potential. Ethambutol, used in the treatment of tuberculosis, is an example. There is also evidence that other drugs, such as alpha-methyldopa, may possess this potential; although its primary therapeutic action occurs via mechanisms other than chelation. The objective of this thesis was to determine the effects of ethambutol and alpha-methyldopa on tissue metal concentrations and balance of four essential trace metals: …

Plate Buckling Under Biaxial Patch Loading, Herli Surjanhata

Theses

This thesis is concerned with the buckling of rectangular plate-shaped elements under biaxial compressive loading with patch loading along one pair of opposite edges. The loading along the other edges is continuous but the discontinuous loading covers different patches along opposite edges. All the applied loads are uniformly distributed. The critical buckling load of this type of plate element is an important factor in the optimal design of many types of thin-walled structures. Frequently the nature of the problem prohibits an exact or even a general form of solution, thus dictating a numerical approach.

The problem has been attacked to …

Implementation Of Dbase Ii In Inventory Management By A Small Firm, Shih-Chieh Wang

Theses

No abstract provided.

An Investigation Of Characteristics Of Blood Velocity In A Simulated Circulation System, Yung-Gang Wu

Theses

The major objective of this thesis is to find the relationship between the blood velocity and the stenosis of the vessel. Tests were performed with different degrees of stenosis at varied logitudinal positions from the testing probe in the vessel of a Z-80 microprocessor controlled artificial circulation system.

Three methods were used to detect the velocity in the vessel: continuous wave Doppler, Pulse Doppler, and a hot-film device. The first method can get the average velocity, while the latter two have the capability to find a velocity profile, and all are important indicators to the arterial occlusion phenomenon.

An analysis …

Finite Element Modeling Of A Femoral Stem In A Total Hip Prosthesis, Robert C. Cohen

Theses

A three-dimensional model was produced to study of effects of stress on a femoral stem in a total hip prosthesis. Using the ANSYS General Purpose Finite Element Computer Program, a reproduction of the system was constructed for the loads acting on the hip joint at intervals of a walking cycle. With isotropic properties for cortical bone, cancellous bone, cement, and selected alloys, the model was generated using three-dimensional, isoparametric, eight-node, solid elements (STIF45). The model consists of over 700 nodes and 442 elements. This model can be used to produce computer calculated stress data, if disc storage space allows.

Behavior Of Thin-Walled Channel Shaped Reinforced Concrete Columns Under Combined Biaxial Bending And Compression, Subash Yalamarthy

Theses

Next to rectangular, circular and L shapes, Channel section may be the most frequently encountered reinforced concrete columns since they can be used as box wall for elevators. Nevertheless, information about the load deformation behavior is not generally available to structural engineers. Most of the investigations have been emphasized on the ultimate strength of column sections under combined biaxial bending and axial compression and the resulting interaction surface. No attention is paid to load deformation behavior.

Current code provisions do not provide adequate guidelines for assessing the strength and ductility of biaxially-loaded reinforced concrete columns. Therefore, this investigation is aimed …

Behavior Of Tee-Shaped Reinforced Concrete Columns Subjected To Biaxial Bending And Axial Compression, Antoun Romanos Nader

Theses

The investigation deals with the effect of eccentric loading on the moment-curvature relationship of reinforced concrete tee columns.

The test program consisted of two series of tee-shaped reinforced concrete columns, loaded biaxially at constant angle from the principle axes. Their end conditions were assumed to be pinned-ended.

Loads, at constant rate, were gradually applied until failure. At each loading stage, measurements were made for the strains and deflections at the mid span section.

The experimental and theoretical results of the load- deformation and moment-curvature were compared and found that the analytical approach proposed by Hsu is applicable to irregular sections …

Microcomputer Applications In Construction Layout, P. Emeruwa Anyanwu

Theses

With recent trends in computer technology, its application to the construction industry is attracting more attention. The cost of owning computer was a primary reason for small and medium sized firms not adopting its use. With the advent of micro and minicomputers, the cost have dropped dramatically. Now one can purchase an Apple Computer (the monitor, keyboard, disk drive, and printer) at less than $3,000. This makes it possible for students like me (the poverty class) to afford to own one.

This thesis explores the powerful potentials of the microcomputer and its use as an aid in construction layout. Surveying …

Successful Management Techniques For Introduction Of Computerized Systems In A Production Facility, Michael James Boyle

Theses

This thesis surveys the potential for introducing significant organizational change into a manufacturing environment which is undergoing large scale capital improvement.

The first portion describes both the organizational and technological barriers present at a specific manufacturing facility. The capabilities of a computer based process control system are detailed along with its ability to fulfill the employer's particular business needs.

The next portion details the work necessary to train both management and production operators, not only on how to use this computer based equipment, but also how they themselves must change their personal modes of thinking in order to carry out …

Computer Analysis Of The Stefan Problem In Cryosurgery, Dong Hyuk Kim

Theses

Numerical solutions for determining the freezing front location vs time relation in cryosurgery are obtained by utilizing the heat transfer computer program TRUMP, which employs the explicit finite difference algorithm. The probe geometries of rectangular, cylindrical, and spherical shape with one dimensional heat flow are selected for study. Internal heat generation is considered in cylindrical and sphe¬rical probe geometries, and the difference between the solutions with and without heat generation is discussed. To verify the correctness of the TRUMP solution, comparisons are made in the freezing distance vs time relation with the Neumann's solution and the implicit enthalpy method for …

Energy And Economic Analysis Of Alternate Total Energy Systems, Swaminathan Balakrishnan

Theses

The purpose of this study is to evaluate the Performance of Diesel engines, gas engines, and gas turbines when used in a Total Energy System. To begin with, the history of cogeneration was studied, current literature and texts reviewed and companies which deal with these engines or turbines were contacted. Electricity and gas tariffs were obtained from the P.S.E.&G. Co. It was decided to consider an apartment complex of approximately 200,000 ft² having peak heating and cooling loads of approximately 4.92 million Btu/hr and 2.93 million Btu/hr respectively for this analysis. The average electrical demand was 520 KW. Next …

Volatile Organic Pollutant Levels In Indoor Environments From The Use Of Kerosene Heaters, Kashinath Banerjee

Theses

The indoor air pollutant levels caused by use of kerosene stoves as sources of heat in residences is of increasing concern as the use of such heaters becomes more widespread. Emission of volatile organic. species (aliphatic hydrocarbons from hexane to dodecane, cyclohexane and aromatic species including benzene, toluene, ethyl benzene, m/p xylenes, o-xylene and styrene) from these devices were measured at different sites. The organic vapor samples have been collected by adsorption on Tenax GC, and quantitatively analyzed by thermal desorption into a high Resolution capillary column gas chromatograph. Mass spectral analysis was also conducted for qualitative identification of sample …

Implementing A Preventive Maintenance Program In A Pharmaceutical Manufacturing Plant, Daniel J. Shatynski

Theses

The goal of Preventive Maintenance is to reduce operating costs through greater equipment availability and lower downtime costs. Its intention is also to reduce the frequency and severity of corrective maintenance. A case study of a chemical manufacturing plant in the pharmaceutical industry is reviewer and symptoms are illustrated for purposes of definition. The development and implementation of a Preventive Maintenance program for this chemical manufacturing plant is proposed.

Analysis Of Selected Volatile Organic Substances Associated With Residential Kerosene Heater Use And The Health Implications, Catherine Coombs Bobenhausen

Theses

Volatile organic species (aliphatic hydrocarbons from hexane to dodecane, cyclohexane and aromatic species including benzene, toluene, ethyl benzene, m,p, and o—xylenes, nitrobenzene, styrene and naphthalene) associated with residential kerosene heater emissions were measured at two sites. One was a small room having a total volume of 23.66 cubic meters and an air change rate of 2.71 air changes per hour, and the other, a living/dining room area having a combined volume of 79.30 cubic meters and an estimated air change rate of .7 air changes per hour. The analytical procedure involved collection of a series of air samples in stainless …

Quantitative Evaluation Of Substituent Effects On Stabilization Energies Of Strained And Unsaturated Molecules, Tyler Arthur Stevenson

Theses

Thermodynamic stabilization energies are presented for a series of monosubstituted vinyl, cyclopropyl, ethynyl, and phenyl compounds. The energies are calculated using ab initio molecular orbital calculations at the 4-31G level, and also with published experimental heat of formation data. Correlation analyses are then attempted with the dual substituent parameter approach with the stabilization energies. The analyses are also attempted with a triple-parameter approach using Topsom's theoretically calculated X, F, and Ro constants. Among the findings are the facts that π-donating substituents correlate well, while π-accepting substituents do not. Indications of the relative sensitivities of hydrocarbon frameworks to substituent electrostatic and …

Color Vision Tests Using A Calibrated Color Monitor Controlled By A Microprocessor, David Wolf

Theses

A feasibility study was performed to determine if colors on a CRT could be measured accurately and then controlled by a computer to provide a means of performing color vision tests. Benefits from using a calibrated computer/monitor system could be decreased testing time, exact diagnosis, and possibly the means of quantifing the degree of the deficiency. The Atari 800XL Computer with a Sakata color monitor were used for the experimentation due to their low cost, availability, and ability to create the largest number of colors of any computer in the same price range. The system was calibrated and color vision …

Photometric Processing And Interpretation Of Ratioed Imagery By Multivariate Discriminant Analysis For Separation Of Geological Types, Donald Marsh

Theses

A study has investigated the ability of ratioed information from Landsat 2 Multispectral imagery, to discriminate geological features through the application of photometric processing techniques. United States Geologic:.1 survey maps corresponding to the areas investigated have been used in correlation with ratioed imagery to identify predict and confirm geological features on the basis of resulting densitometric information. A multivariate, discriminant analysis of rock type, exposure data has enabled the fabrication of the final, optimized ratio image. The optimisation process used to predict geological types involved a priority structure that found the spectral bands with the highest discriminatory power and the …

An Investigation Of The Effects Of Image Angle On Resolution Of Fine Detail Screen Printing, Amy L. Feldman

Theses

Screen printing, unlike other printing processes, requires ink to be pushed through the image carrier to the substrate. When the mesh threads and their intersections cross the image area, they act as obstructions to the ink flow. In large image areas, the effect of mesh interference is minimal. In fine detail screen printing, mesh interference is a primary cause of poor or inaccurate resolution. The trend in screen printing has been toward more and finer fine line, halftone and four-color process printing. Researching methods to minimize mesh interference will enable screen printers to gain greater control over the printing process …

A Study Of The Effect Of Coating Variations On Resolution Performance In The Single-Phase Association Product Plates, Te-Chung Chen

Theses

Most people conceive of lithography as a planographic method of printing. In point of fact, only some of the original lithographic plates had truly planographic surfaces. Most lithographic plates used in industry today do not have the same material in the image and non-image areas, so they are called double-phase plates . Because of light undercutting and the roughness of the grain structure of the carrier, the use of conventional double-phase plates for fine image reproduction, where resolution is the main concern, has been limited. The purpose of this study was to determine the image formation mechanism of single-phase plates …

Developing Positive Attitudes In Non-Handicapped Children Toward The Handicapped: A Third Grade Curriculum Guide, Marie E. Haupt

Theses

The major purpose of this curriculum is to develop positive attitudes in nonhandicapped children toward the handicapped. Public schools are mandated by law to include handicapped persons in their educational programs. The introduction explains attitudes of nonhandicapped children toward the handicapped, whether these attitudes can be changed, and how they can be changed.

This curriculum is for third grade and includes l earning about the visually impaired/blind, hearing impaired/deaf, health and physically impaired, learning disabled, mentally retarded, speech impaired, and emotionally and behaviorally disturbed. The media and materials used are books, films, filmstrips, simulated activities, role play , discussions, guest …

A Curriculum For The Gifted Kindergarten Program On The Lindenwood College Campus, Kay Hoffmeister

Theses

The establishment of a kindergarten for gifted children on the campus of Lindenwood College, St. Charles, Missouri, created the need for a curriculum designed to meet the special strengths and weaknesses of those who would attend.

While these children often possessed advanced skills in reading and math, they were still five-year-olds with certain emotional, social and physical limitations due to their young age.

Also, research suggested that high IQ scores and accelerated cognitive, left brain learning did not usually exist with high levels of creativity. Yet futurists noted that creative, divergent thought skills would be essential in the world of …

The Effects Of A Reflective Drill On Graphically Similar Substitution Errors, Janet Westmann

Theses

This paper concentrates on the reduction of substitution errors through the use of a graphically similar reflective drill in the oral reading of first graders. A reflective drill is a drill designed with a timed delayed response. The delayed response is designed to train the student to discriminate between the stimuli and respond correctly rather than quickly.

After defining terms, the literature review includes studies on 1) reading errors, 2) perceptual development, and 3) impulsivity.

The research design will be experimental using the classroom situation and first grade students. Using previously established reading groups within the classroom six subgroups will …