Digital Commons Network^™

Deposition Of Suspension In Inclined Channels Due To The Effects Of Inertia, Gravity And Image Force, I-Hsi Chu

Theses

This investigation was made to determine the effect on the deposition of particle in an inclined parallel-plate channel due to the influences of image charge, viscosity, inertia and gravity. The flow considered was lamina, imcompressible and steady. The flow patterns considered were uniform and fully developed with symmetry about the axis of the channel.

The governing equations derived for a particle were based on Newton's Second Law of motion. Since the resulting governing equations are linear second order differential equations, Runge-Kutta algorithm is used to solve the problem and graphical techniques is used to interpret the results of the numerical …

Microcomputer Controlled Instrumentation System For Studies Of Metabolic Changes In Rats, Murat Dertlioglu

Theses

The system measures the respiratory exchange in rats in a controlled experiment. An interface unit provides data, received from several measurement instruments such as gas analyzers, an electronic flowmeters, electronic thermometer and an electronic hygrometer, to the computer. The data is gathered from different chambers in a multiplexed mode.

The computer samples the chambers sequentially and prints out the results and stores them on the disk. The sampling duration of each chamber and the number of the rats to be tested can be programmed. The system can perform experiments with twelve animals, in the following arrangments, either one group of …

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.

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 …

Coupled Flexural And Torsional Vibrations Of Beams, Sang Hwan Kim

Theses

This thesis deals with the vibration of a beam whose flexural and centroidal axis are not coincident. The elementary bending- twisting theory is employed to derive the equations of motion, in which the effects of rotary inertia are added to the bending displacements and the effects of warping are added to the twist. Bending translation is restricted to one direction so that one bending equation is used instead of two. The equations of motion are solved by using the boundary value problem. The exact natural frequencies are found from the frequency equation , which is obtained from the condition that …

Deposition Of Particles In Cylindrical Chamber Due To The Effect Of Image, Inertia, Viscous And Gravity Forces, Mehul J. Shah

Theses

This study investigated the behaviour of charged particles in cylindrical chambers under the influence of image, inertia, viscous and gravitational forces. The flow was considered to be laminar, steady state and incompressible. The velocity profiles considered were uniform and parabolic with symmetry about the axis of the cylinder.

The governing equations derived were based on Newton's second law of motion. The equations for the case neglecting gravity are linear second order equations and the Runge-Kutta method was used to find a numerical solution. The data hence obtained is fitted to equations using curve fitting method. These equations and graphical techniques …

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 …

Flow In A Channel With An Abrupt Change In Area : Finite Element Method, Ching-Fu Yu

Theses

Steady flow with an incompressible non-viscous fluid in a two-dimensional channel with an abrupt change in the width of its flow passage has been studied with a finite element method and a complex potential method.

The flow problem was solved with the use of an existing finite element program, FLOW2, in terms of the velocity potential and the stream function. The general procedure of solving problem by finite element method and the user's guide of FLOW2 program are presented in this thesis.

A computer program, EXACT, has been written for the exact solution based on the complex potential method to …

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 L-Shaped Reinforced Concrete Columns Under Combined Biaxial Bending And Compression, Amar Shah

Theses

Combined biaxial and axial compression for L-shaped reinforced concrete short columns is a common design Problem. Current code, provisions and the available design aids do not offer an insight into the determination of strength and ductility of biaxially loaded reinforced concrete column. An experimental and analytical investigation of the moment-deformation behavior of biaxially loaded L-shaped short columns were undertaken. Four 1/2 scaled specimens were tested till failure. Moment-curvature and load-deflection curves were developed from the experimental and the analytical results. The analytical results were obtained using a computer program developed by Hsu (1). From the investigation it is deduced that …

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 …

Performance Modeling And Simulation Of Multiple Microcomputer Systems, Moorthy Narayana Hariharan

Theses

Multiple processor systems are the logical choice for applications demanding high computing power, throughput and reliability. Moderately coupled Multiple Microprocessor systems can be applied to a variety of applications demanding high performance. The structure of Multiple Microprocessor systems is examined. Various interconnection structures are analysed for performance comparisons.

Queueing theory is a powerful tool in modeling and analysing Computer systems. Queueing models are developed for popular Multiple processor interconnection topolog es like the Shared memory, Shared bus, Star and Loop configurations.

The usefulness of Digital computer Simulation techniques in estimating the performance of Multiple processor systems is demonstrated through a …

Calibration Of Flame Ionization Detector For Chlorinated Hydrocarbons, Nahid Jabalameli

Theses

Relative Responses and Calibration Factors were developed for several volatile organic (mostly chlorinated) priority pollutant species in order to use one single stable compound (e.g.Benzene) for daily instrument calibration. This would replace the procedure of using a standard mixture of target compounds (25-35). This is of particular advantage because the standard mixture may not have all species stable or may show loss of some components relative to others due to wall adsorption in the standard (compressed gas) stainless steel cylinder.

The use of a single standard species was made possible by developing "accurate" relative response and calibration factors of all …

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 …

The Application Of The Finite Element Method To Plate Stress Analysis, Yao-Zong Jen

Theses

The finite element formulation of plane elasticity and plate bending is presented and is employed in the development of the formulation of element stiffness equations and structural stiffness equations. The basic relations used to derive the finite element equations for a solid continuum are also presented. The programming organization is summarized.

The computer program cited from TAYLOR has been used to solve the deep beam problem with triangular and rectangular elements and the SAP IV program has been used to solve the plate bending problems with quadrilateral elements. Problems solved are: (1) stress distribution at the midspan of a simply …

Synthesis Of Cyclobutenyl Ketals, Atef Z. Boulos

Theses

A series of dialkoxy derivatives of N,N'-di-tert-butyl-2-butylamino-3,3-dichloro-4-dichloromethylene cyclobutenyl carboxamidinum chloride, were prepared by dissolving either Na+ or K+ alkoxide in the appropriate alcohol, or by treatment with potassium hydroxide in the appropriate alcohols. Thus, the dimethoxy, diethoxy, di-isopropoxy, di-n-butoxy, di-tertbutoxy derivatives were obtained.

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 …

The Second Moment Method, A New Way To Test A Lens, Christopher Curtis

Theses

The second moment method is proposed as a method of obtaining a one dimensional approximation to a two dimensional angularly averaged modulation transfer function for low spatial frequencies. For two orthogonal knife-edge scans of a point spread function, the second moments about the centroid of the corresponding line spread functions are determined. The two second moment values are then used to approximate the two dimensional angularly averaged modulation transfer function. Two rotationally asymmetric point spread functions were used to test the approximation, an equilateral triangle and a rectangle. The results show, for both cases, that in the 1.0 to 0.5 …

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 …

Development Of A Handbook For Independent Studies In Small High Schools, Kathryn M. O'Connor

Theses

The purpose of this study was to develop a handbook for independent study programs for small high schools. Small private high schools in the St. Louis area were surveyed in regard to their independent study programs. It was found that schools using such programs were enthusiastic about the results they produced. Current literature also showed the value of independent study in promoting higher level thinking skills among students. The survey results and information gathered from current literature were then used to formulate a handbook for independent study programs at small high schools.

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 …

Early Childhood Physical Fitness Curriculum, Mary A. Reineke

Theses

Physical education in early childhood should be organized, directed, and purposeful. With this criterion as a guideline herewith is offered a general, comprehensive physical education curriculum which includes guidelines in the areas of physical development with a specific proposed physical fitness curriculum which offers a sequential plan of instruction related to the development of the young child and makes available to parents, teachers, and physical education directors, a coordinated program which is useful when working with young children. To validate the proposal, recent literature in the field of study was examined, experts in the field of sports, medicine, and physical …

Emas, Elton Pride

Theses

The purpose of this thesis is to design a database for videotex from the view point of a Graphic Designer without ignoring technological aspects. I am dealing with a problem that has been overlooked and needs to be addressed the problem of database structure, search procedure, and retrieval of information for videotex. The goal is to design a database for videotex that will give the user ease of manipulation of information and better retrieval of that information with high interactivity and massive random access.

Glass In A Slump, Peter Andres

Theses

This thesis has been formed in two major segments. The first portion deals with glass information including processes and techniques. The second addresses my work in terms of personal issues, manner of approach, symbolism, composition, visual eclecticism and internal source of imagery. The subjects dealt with in the two sections are mutually modified in their working relationship. Each yields to the pressure of the other as I constantly want to do more than I am able. I have separated them for the sake of clarity, as I conceive them; the first being the means and the second the end. Even …

A Study Of Color Change With Respect To Dot Misregister In Dot-On-Dot Multicolor Halftone Printing, Christopher Vasko

Theses

Color variation with respect to dot misregister is a phenomenon that has long been observed in the color printing industry. In this paper the relationship between dot misregister and color change in dot-on-dot multicolor halftone printing has been investigated for the additive primaries red, green and blue. By measuring the color difference between in and out-of-register dots the direction of color shift and its magnitude can be determined along with the decrease in lightness of out-of-register samples. Misregistered red and green samples displayed a yellow color shift and misregistered blue samples displayed a purple color shift. The lightness of all …

A Mathematical Model For A Reversible Tri-Layer Optical Memory Disk, Ariel Shaw

Theses

A research project has been performed, in which a mathematical model for a reversible tri -layer optical memory disk was generated. The disk's reversiblity properties are based on the polycryst aline to amorphous physical phase transition that takes place in the disk's top chalcogenide layer. Given the disk's defining parameters, complex indices of refraction, and layer thicknesses, the model predicts the disks output in terms of a contrast ratio. The output, the contrast ratio, is simply the reflectivity of the chalcogenide in its amorphous state divided by the reflectivity of the chalcogenide material in its polycrystaline state.

The Problem Of Gelling When Silicates Are Substituted For Gum Arabic In Lithographic Fountain Solutions, David Wang

Theses

The fountain solutions used for lithographic offset printing are solutions combining several chemicals. Each consists of water, some weak acid, gum arabic and alcohol in some fountain solutions, and some additives such as a nitrate, phosphate, bichromate, etc. This paper is a study of using polysilicate material instead of gum arabic in lithographic fountain solutions. Also, to solve the problem of silicate gelation by using the proper ratio of chemicals. The gelling problem of silicate material may be affected by the concentration, pH value, organic solvents and impurities, etc. Any one of the above will make the silicate material gel …

A Comparative Study Of Second Grade Students On The Effects Of The Use Of Manipulative Aids On The Operational And Recall Skills In The Multiplication Of Three, Kell Brown

Theses

The purpose of this experimental study was to investigate the operational and recall ability of second grade children, after instruction and the use of manipulative aids , to understand the multiplication of three. Multiplication of numbers at the early stages, in most mathematics programs, provides for rote memorization and drill instead of concept understanding. Most practices and drills require only answers to the facts, which provide little indication that a student can explain or show how that answer was obtained. Memorizing the multiplication facts is important, but at this early age the operation on those numbers to obtain an answer …