Digital Commons Network^™

Steady State Heat Transfer From Two Concentric Rings Of Spheres, Kevin J. Fitzpatrick

Theses

The method of reflections was used to solve the steady state heat transfer problem for two concentric rings of spheres, all at equal surface temperature. The method results in a mathematical model for the three dimensional temperature profiles around the array of spheres. This model is used to develop an expression for heat transfer rate from the array. This work has resulted in a solution for dilute systems since no ring to ring interaction term was found.

On The Analysis And Design Of Clamped Rectangular Plate With Partial Load, Yacin Saaid Jaboury

Theses

In this Thesis, maximum deflection and bending moments of a partially loaded clamped rectangular plate are studied. The loading is uniformly applied to a retangular area proportional to the shape.

Navier's Solutions on partially loaded simply supported rectangular plate is superimposed with edge moments to give the clamped boundry condition.

Solutions of maximum deflection and bending moments are derived in Double Series form. A Fortran program is employed in obtaining the numerical results. When the partially loaded area approaches zero it becomes a centrally loaded case; and when loading area to plate area ratio approaches unity it becomes a uniformly …

Bending Vibrations Of A Cantilever Beam On An Eccentric Rotating Disc, Yousry S. Aboelnaga

Theses

The differential equation of motion for the C.G. line of a vibrating cantilever beam which is mounted on an eccentric rotating disc is derived. Exact solutions in terms of hypergeometric functions of this fourth order differential equation with variable coefficients are obtained by making several mild assumptions. These solutions include a large class of vibrational modes.

The primary idea leading to the exact solutions is the factorization of the fourth order differential operator into a pair of commuting second order operators.

Numerical Solution Of Navier-Stokes Equation By Finite Element Method, Kuan-Tzong Lee

Theses

A finite element method for solving the entrance flow in a parallel-plate channal at low Reynolds number has been studied. Two methods of formulation for both incompressible viscous and inviscid fluid flows were developed. The first uses stream function and potential function as field variables while the second uses velocity and pressure. Both formulations presented here ultilized variational principle and weighted residual method. The numerical example was solved by constrained variational principle with penalty functions in conjunction with the Newton-Raphson method. A 9-node quadratic quadrilateral element was used in this example. Numerical results for entrance flow problem were obtained for …

Behavior Of Reinforced Fibrous Beam-Column Joints Under Cyclic Loads, Sitaram Mahadev

Theses

From exploratory research of reinforced fibrous concrete, it has been shown that fibrous concrete is potentially superior and less costly than the conventional reinforced concrete.

The testing program consisted of ten beam-column joints with half of these joints containing 1-1/2 percent hooked end fibers. The beam column joints were constructed with less hoops than a conventional seismic joint would have, according to design specifications of the American Concrete Institute Code (ACI 318-77). In studying the behavior of these beam-column joints, two loading cases were examined:

(1) critical regions whose inelastic behavior was controlled by bending, and

(2) critical regions whose …

Computer Aided Analysis Of Electroencephalographic Waveforms, Edward Tadeusz Polkowski

Theses

An approach to analysis of EEG waveforms is described. The procedure utilizes a PDP -11 computer to perform a Fast Fourier Transform on four channels of data simultaneously. The transforms are done in real time and. the results are plotted in a manner which allows the operator to easily determine the major background activity and to check for left-right symmetries in brain waves. Patient data is used to verify the computer output against actual clinical diagnoses.

Blood Pressure Signal Simulation In An Artificial Circulation System, Shaw-Jyh Shin

Theses

The major objective of this thesis is to produce a desired pressure waveform in an artifical circulation system by using a Z-80 microcomputer controlled stepper motor. This will simulate the desired blood pressure waveform in the human body and can be used for clinical application.

A microcomputer simulation was used for setting up an electrical circuit model to represent the artificial circulation system as well as for finding out the relationship between motor speed (piston displacement) and pressure waveform.

Using this techniques, a desired pressure waveform which represents the blood pressure waveform in the human body can be obtained.

Electroplating And Electroforming As An Artists' Medium, R Lisa Toser

Theses

Not Included

It's In My Hands Now, Jennifer B. Reed

Theses

Not Included

What Every Designer Should Know About Visual Semiotics: A Videotape Presentation, Anne Elizabeth Battle

Theses

Not Included

An Investigation Of The Effects Of Fabric And Stencil On Resolution And Registration In The Screen Printed Circuit Board, Jeffrey Paul Sauser

Theses

Printed circuit boards are a major component of most modern electronic devices. There are currently two major processes by which circuit boards are imaged; dry film and screen printing. This study investigated the screen printed circuit board. The resolution and registration limits are primary concerns of the screen circuit printer. These two factors are greatly influenced by two screen components; fabric and stencil system. The effects that two fabrics and two stencil systems had on the resolution and registration capabilities of a screen circuit printing system were determined. A test target was printed on a circuit substrate by a screen …

The Effects Of Low-Sugar Diets On Behavior And Paired-Associate Learning In Normal Children, Elizabeth Louise Eller

Theses

An experiment was conducted to determine whether reduced sugar diets improve learning and/or alter behavior in normal children . The 14 Ss--seven males and seven females- -were elementary school students, ranging in age from 8.01 to 10.06, matched for age, sex, race, and SES, and screened for med i cation and learning disabilities . They were sequentially assigned to low- sugar and usual diet groups for two - and four- week periods . In a pretest-pottest design, assessment instruments were a paired- associate (PA) learning task and a Nutrition Behavior Inventory {NBI) . The pretest mean NB! indicated at least …

The Installation Of A Standard Cost System In A Small Manufacturing Environment, Joseph M. Taylor

Theses

This culminating project by Joseph M. Taylor presents a detailed case study of the installation of a standard cost system in a small manufacturing environment, specifically at Hofman Manufacturing, Inc.—a pseudonym for a real St. Louis-based hardware company. The project explores the integration of management accounting principles with a computerized management information system, aiming to improve internal planning and control processes. Prior to the system's implementation, Hofman Mfg. lacked an internal accounting department, relying instead on external public accountants. The absence of timely and accurate cost data hindered effective pricing and decision-making, particularly amid a volatile economic environment.

Through direct …

Quality Control Circles And The United States, Herbert M. Hart

Theses

The Quality Control Circle attempts to solve management and production problems using a participative management style. This study represents an analysis of how the Quality Control Circle emerged in Japan and efforts in the U. S. to Americanize the concept. It is important to note that participative management represents a single management style. This style is not recommended for every organization. Organizations must select the appropriate management style to accomplish conceived goals and the style must fit within their particular corporate culture. The Quality Control Circle is an outgrowth of participative management and is not-all inclusive of participative management ideals.

Motivation, Management Motivation, And Its Perceived Decline In American Bureaucratic Organizations In The Context Of Changing Attitudes And Values, Jon Lawrence Johnson

Theses

This Culminating Project represents an inquiry into the existence, applications, and parameters of human motivation and its impact on perceived management attitudes, values, and motivation to manage.

The topic is examined from three vantage points. Part I embodies a selective indoctrination in human motivation concepts and suggests relevant organizational applications and examples in illustration. The term "motivation" has evolved into a popular but often misapplied catch phrase. Therefore, a foundation in prominent human motivation theory is provided as precedent to issues subsequently discussed in the Project, to offer the reader an accurate base of subject knowledge.

Part II addresses the …

I Am A Camera: The Open Shutter, The Open Wound, David M. Houghton

Theses

No abstract provided.

Flow Tube Reactions Of Selected Chlorocarbons With Molecular Hydrogen Or Water Vapor In A Microwave Induced Plasma Reactor, Robert Benedict Barat

Theses

The reactions of various chlorinated hydrocarbons with molecular hydrogen or water vapor have been studied in a microwave plasma tubular flow reactor. The investigation of such reactions is desirable because the often toxic parent chlorocarbons are transformed to more thermodynamically stable and relatively non-toxic products by removal of' chlorine atoms as hydrogen chloride. Present detoxification technologies generally employ thermal oxidation as a means of disposal of chlorocarbons, which does not offer a thermodynamically stable sink for the chlorine atoms.

The experimental apparatus included feed introduction systems, a microwave plasma reactor, and full product analyses. The feed systems enabled use of …

Error Detection For Data Communication Systems, John Biancamano

Theses

A description of the problems encountered in the data communications field and the various solutions can be found in a number of diverse, and often theoretical sources. My intention in writing this thesis is to bring together, in a practical and understandable manner, the theory and the application of a method of error detection used extensively in data communication systems known as the Cyclic Redundancy Check (CRC).

To provide some background on the subject, a description of a data communication system is presented, and the possible sources of error are explored in some detail. Data transmission formats are described, and …

The Computer And The Secondary School English Curriculum, Marjorie Schmieder

Theses

Not provided.

Distributed Computation In Computer Networks, Ching-Liang You

Theses

None provided

Investigation Of The Radiometric Integrity Of The Theogram After Its Raster Scan Lines Are Removed Through Spatial Filtration, Joan Allamena

Theses

Thermograms are records of density levels which correspond to apparent temperatures. The process of thermographic imaging is based on Plank's law which relates temperature to radiance. It begins with the collection of quantum energy which is then converted to voltage. The voltage powers a light source to expose the recording material of the thermogram. Atmospheric effects must also be taken into consideration. The relationship which takes all variables into account can be found in appendix A.

A Study Of Comparable Identifiably Predictions Of Some Resolving Power Targets By Fourier Spectra Considerations, James Greene

Theses

This report documents a study conducted to examine the correlation between identification thresholds and difference spectra of some resolving power target characters. The experiment included the USAF Tri-bar target, the RIT Alpha-numeric Resolving Power Target, and a set of targets called the Granger Modified Tri-bar targets. Assuming that target identification is a filtering process and primarily a function of its frequency spectrum, this study began with a prediction of targets that would have equal identification thresholds from difference spectra considerations. Target images were viewed at various sizes to confirm/refute the original hypothesis. The USAF targets demonstrated adequate control of experimental …

The Effects Of Mechanical Stress On Photographic Emulsions, Dennis A. Weiss

Theses

The effects of mechanical stress on a photographic emulsion, namely Kodak Royal-X Panchromatic, has been investigated. The effects are related to the phenomenon of "Kink Desensitization" of the photographic emulsion. Despite the numerous experiments, results and explanations by previous authors on this phenomenon, a model relating the effects of mechanical stress on emulsions and dislocation theory of strained crystals still evades the photographic scientist. Strips of emulsion were axially stressed, using a Dillon tensiometer modified for compression. To analyze the changes in photo graphic sensitivity of the emulsion, the characteristic curves of the developed internal and external images were compared …

An Active Filter Design Program (Theory And Application), Louis Gabello

Theses

This thesis deals with the design of filters in the frequency domain. The intention of the thesis is to present an overview of the concepts of filter design along with two significant developments: a comprehensive filter design computer program and the theoretical development of an Nth order elliptic filter design procedure. The overview is presented in a fashion which accents the filter design process. The topics discussed include defining the attenuation requirements, normalization, determining the poles and zeros, denormalization and implementation. For each of these topics the text ad dresses the fundamental filter types (low pass through band stop). Within …

Nonlinear Analysis Of Shear Walls And Shear Panels By Finite Element Method, Erhan Atay

Theses

The objective of this work was to determine the feasibility of applying the Finite Element Method to Nonlinear Analyses of Shear Walls and Shear Panels.

Various existing methods are reviewed and discussed.

These studies determined that the application of Finite Element Method to Nonlinear Analysis of Shear Walls and Shear Panels is being misused in many cases but is very practical and promising where justified. However more studies are needed for the manner of modeling to be used to connect the wall to beam and slab elements that frame into that wall. To model the coupled beams as plane stress …

Analysis Of Ink Film Thickness On Screenless Lithographic Plates By Microscopy, James Spruill Summers

Theses

Printing without the use of a halftone screen pattern offers many advantages, although most processes utilized are impractical for long run commercial printing. Screenless lithography provides a practical means of making unscreened reproductions. While screenless lithography has been in use for many years, its working mechanisms have only recently been explained. Past studies have investigated many of the factors which contribute to the continuous tone effect of screenless printing, but none have scientifically determined if ink film thickness variation is a contributing factor. Positive working lithographic plates were exposed to control scales, processed, inked, and allowed to dry. These plates …

Adaptive Delta Modulation, Aliuddin Ahmad

Theses

The objective of this thesis is the study of the performance of instantaneously companded adaptive delta modulation (ADM) systems in comparison with linear delta modulation (LDM) in terms of signal to quantization noise ratio (SNR). Various schemes for ADM are discussed and their advantages and disadvantages are indicated. SNRs are calculated by simulation, with IBM's continuous system modeling programming (CSMP) language being used as a tool for simulation. LDM, first and second order constant factor delta modulation (CFDM), has been simulated and responses for different types of input signals are presented.

A Modified Unifac Model For The Prediction Of Henry's Constants, Carlos Alberto Marques Antunes

Theses

A group-contribution model for the correlation and prediction of Henry's constants in single solvents is presented. The mode: involves a one-parameter per gas/ solvent group pair UNIFAC expression extended to incorcorate free volume effects. The model is applied to three gases, CH₄, N₂, and O₂ in alkane solvents and in water. Good results, including a successful description of the temperature dependency of the Henry's constants, are obtained with typical accuracy of ± 10%.

Transportation Alternatives For Peak Period Passenger Travel In Greater Georgetown, Ahamad Baksh

Theses

Alternatives to present a workable and cost effective solution(s) to the inadequate supply of public transportation during the peak hour periods in Greater Georgetown (Guyana) are examined. Various transportation system management strategies that could help in either to service the peak period demands by more effective utilization of available transport resources or to manage these demands by altering peaks patterns, are discussed. Data from the transportation study aspect of the "Physical Plan for Greater Georgetown", conducted by the Central Housing and Planning Authority as well as data from the files of the Central Transport Planning Unit of the Ministry of …

Direct Diffusion Resist For Gravure, Wilson Hurst

Theses

One of the most attractive attributes of the gravure process is its ability to print a variable ink film by virtue of cell depth variation. This cell depth variation is achieved through the use of a diffusion resist. All diffusion resists are negative-working and, after exposure, require transfer to plate or cylinder. A "negative-working" resist is one where the emulsion becomes insoluble to the developing solution in those areas struck by actinic radiation. Presently available resists, which are directly applied to plate or cylinder prior to exposure, are not capable of controlling cell depth variation. Thus, the tone range obtainable …