Digital Commons Network^™

An Experimental Investigation Of Wear Behavior Of Ultra-High Molecular Weight Polyethylene Under Sliding Motion, Elham Zand-Moghaddam

Theses

This project investigates the effect of sliding motion on the materials that are used as bearing surfaces of human total-joint replacement prostheses.

The tests are performed with a specially designed equipment based on pin-on-disk machine. The testing machine is designed and constructed to reproduce sliding motion, applied to spherical ended metal "Canine-Head" components such as dog hip acting on a flat polyethylene surface. The sliding motion is performed by applying different constant loads for 5,000,000 cycles. The tests are carried out with the wear specimen lubricated by deionized water.

The purpose is to produce delamination, which is the severe wear …

The Design Thing : A Study Of Design In Practice And Theory, Magd Donia

Theses

The main purpose of this study was to present an overview of design practices and theories in different domains that would enrich the perspective of architectural design. To achieve this purpose, the study presented the initial purpose of architectural design which is providing an adequate shelter for different human activities. Positive and negative aspects of shelter were briefly discussed to trace the evolution of the concept of shelter. Change, as an essential aspect of design was presented in the context of problem formulation and problem resolution.

A presentation of design practices followed. It started by presenting design practices that are …

Adaptive Two-Stage Detection Scheme In Synchronous Two-User Cdma Systems, Yong Jiang

Theses

A conventional single user detector is not optimum in the multiuser environment because the multiuser interference can not be modeled as an additive Gaussian process. Such a receiver is very vulnerable to the near far situation. The receiver that is optimum for multiuser environment has high complexity and requires a knowledge of the received signal energies. Various versions of the receiver that handle the near far situation have been proposed in the literature. In this work, an adaptive two stage scheme for a synchronous two user environment with unknown received energies is proposed. It consists of a, tandem of the …

Mechanism Of Pneumatic Fracturing, Trevor Compton King

Theses

This thesis investigates the mechanism of pneumatic fracturing in geologic materials such as soil and rock. Pneumatic fracturing is a recently developed technique for increasing the permeability of geologic formations by the controlled injection of high pressure air. Present applications are focusing on the in situ remediation of contaminated soil and ground water, although pneumatic fracturing has other geotechnical uses such as pumping well enhancement.

A comprehensive literature review of a related technology known as hydraulic fracturing is presented, which serves as background for development of a pneumatic fracturing model. Pressure-time histories from actual pneumatic injections are analyzed in detail …

Implementing A Tool For Designing Portable Parallel Programs, Geetha Chitti

Theses

The Implementation aspects of a novel parallel programming model called Cluster-M is presented in this thesis. This model provides an environment for efficiently designing highly parallel portable software. The two main components of this model are Cluster-M Specifications and Cluster-M Representations. A Cluster-M Specification consists of a number of clustering levels emphasizing computation and communication requirements of a parallel solution to a given problem. A Cluster-M Representation on the other hand, represents a multi-layered partitioning of a system graph corresponding to the topology of the target architecture. A set of basic constructs essential for writing Cluster-M Specifications using PCN are …

Geometric Dimensioning And Tolerancing A Tool For Concurrent Engineering, Tapan Kumar S. K. Jain

Theses

The concept of Concurrent Engineering recognizes an immediate need for a new design environment and technology and so requires extensive interdisciplinary cooperation and integration of diverse functions of a manufacturing organization such as marketing, design, manufacturing and finance. One of the key factors to achieve successful integration among the departments is better communication and it becomes imperative in cases of varying levels of communication needs, especially in interdepartmental cases.

Concurrent Engineering is a philosophy which provides certain benefits. There are various tools and methods available for implementation of Concurrent Engineering concepts. One of the tools is Geometric Dimensioning & Tolerancing …

A Simulation Of A Monitoring And Alarm System In An Energy Management System, Hui-Jen Liu

Theses

This is a simulation for an energy system's monitoring and alarm and working under KEE's environment. Because of KEE's powerful capabilities, we can monitor and get warning signals from several active windows that we attaching them from KEE's system knowledge base to our source code.

It is very convenient for us to set every member of the energy system on an image panel. We can monitor the entire conditions of that member and get highlighted warning signals from its own image panel. Also we can initialize them by a kind of method-actuators windows if we want to restore the system.

Polarimetric Fiber Optic Sensor For The Measurement Of Strain, Wei Ma

Theses

In this thesis, development of a Polarimetric Fiber-Optic strain sensor is presented. The sensor uses the phenomenon that strain can deform the probing part of the fiber and hence change the polarization of the transmitted light signal. By counting the resulting fringes, we can measure the exact strain in the material. Calibration of the sensor was achieved by setting up tension tests. Optical fibers were glued on the surface of the specimen. Reference strain gages were used to record the strain in the specimens. Resulting fringes from the fiber optic sensors were then related to the strain measured by the …

Laboratory Health And Safety Compliance Guide For Private Colleges And Universities, Gina Marie Ochs

Theses

Academic laboratories are presented with the unique challenge of ensuring the health and safety of all people involved in daily activities. The Occupational Safety and Health Administration (OSHA) recently enacted the regulation 29 CFR 1910.1450, "Occupational Exposure to Hazardous Chemicals in Laboratories," which applies to all private employers (including colleges and universities). In this work, a guide is developed to assist private colleges and universities comply with applicable governmental regulations and to ensure the health and safety of all individuals involved with laboratory activities.

Academic laboratories warrant special consideration because of the nature of experimentation (variation in research and classroom …

Simulation Of Manufacturing Cell Using Hoops Graphic Software And Siman Simulation Language, Parikh Vipul

Theses

Control of jobs being processed in manufacturing shop floor is important to management. The performance of job shop is affected by shop congestion due to arrival rate, batch size, number of machines, buffer capacity, process time variation, and dispatching rules use to load the jobs on the machine.

The job shop is a very complex system and hence, it is difficult as well as time consuming to obtained result using analytical method. A SIMAN simulation language is used to create generic model of a manufacturing cell and simulation analysis of those parameters variation such as job shop efficiency, the average …

The Postbus Fault Tolerant Clos Network, Udayabhanu Sarangapani

Theses

The trend in modern computing is to develop multiprocessor systems with hundreds, even thousands, of processors and memory modules. The task of providing communication paths among all these units is not a trivial one. For a small number of functional units, direct connections could be used but for large systems interconnection networks have to be used. Multistage Interconnection Networks (MINs), provide a dynamic means for interconnecting processors and memory in a multiprocessor system. These networks are built with switches in each stage.

The Clos network is a well defined family of MINs and consists of three stages. The ordinary Clos …

Multilevel Embeddings For Massively-Parallel Hypercubes, Devenkuma P. Shah

Theses

Hierarchically structured arrays of processors have widely been used in the low and intermediate phases of image processing and computer vision. Since the pyramid structure efficiently supports local and global operations extensively required by these phases, it has been widely used for relevant algorithms. Multilevel systems keep all the advantages of the pyramid structure while providing a general hierarchical structure that is easier to be used for the development of several algorithms and may also provide higher performance.

Although the cost of pyramid machines may be tremendously high, they have limited applications. In contrast, the hypercube network is widely used …

Computer Simulation Of Intracranial Hemodynamics During The Induction Phase Of Anesthesia, Gopinath P. Sundaram

Theses

The induction of general anesthesia is associated with severe hemodynamic compromises which, in turn, may cause acute elevation of intracranial pressure (ICP). Quantitative assessment of cerebrovascular responses arising from multiple mechanical and pharmacological interventions occurring in a short time interval require a large number of human studies which are difficult to perform. The purpose of this project is to evaluate the effect of various stimuli on the intracranial hemodynamics during induction using a mathematical model of cerebrovascular circulation.

A five compartmental model of the cerebrovascular system is used for our simulation. Autoregulation is modeled by adjusting arterial-arteriolar resistance in order …

Compliance Documentation For Osha's Bloodborne Pathogen Standard Including Exposure Control Plan And Training, Edward Lloyd Tyerman

Theses

The Occupational Safety and Health Administration's (OSHA) regulation on Bloodborne Pathogens is in full effect since its introduction on December, 1991. This standard mandates that every company whose workers may expect to come into contact with human blood, or other body fluids, during the course of their work develop an Exposure Control Plan, train employees about Bloodborne Pathogens and establish work practice controls. All hospitals, physician and dental offices, ambulance companies, emergency medical technicians, medical laboratories, fire departments, and sites with their own first aid and response teams must comply with the standard.

Bloodborne pathogens include, among others, the human …

Modeling And Simulation Of Magnetic Micromotor Performance, Ping Wang

Theses

The objective of this research was to model the performance and optimize geometries for two types of magnetic micromotors: yoke-type (YTMM) and yokeless (YSMM). The two selected micromotor types matched the designs that have been described in the recent research literature. Modeling was accomplished using MAXWELL, an advanced 2-D and 3-D simulator. The micromotors with nickel and nickel-iron magnetic thin films for the rotor and stator were simulated for torque performance. Three-phase power supplies with overlapping and non-overlapping phases were used. Rotor diameter dimensions were varied from 285 to 600µm, and the rotor-stator air gap was varied from 3 to …

Trophies From A Wandering Soul: A Study Of Visual Texture, Westy Caswell

Theses

None provided.

The Contemporary Development Of A Historical Building, Melody Shinn

Theses

The history of Columbus Hall began with the enactment of a bill by the state legislature to found the Mississippi Industrial Institute and College at Columbus, Mississippi, on March 12, 1884. Among those who were instrumental in the chartering of the institute were as follows: Senator John McC. Martin, Col. W. H. McCardle, Dr. G. S. Roudebush, Mrs. Annie C. Peyton, and Mrs. John C. Hastings. John McC. Martin of Port Gibson was responsible for the introduction of the bill which sought to "secure an institution for the broader and higher education of Mississippi women." The city of Columbus offered …

Experiential Design, Laurel Sisson

Theses

None provided.

The Relationship Between Typographic Design And Photography: Effectively Combining Type With Image, Kristen Leigh Bell

Theses

This thesis project examines the way in which typographic and photographic variables influence visual communication.

Humor As An Element In Graphic Design, Jason J. Snape

Theses

This documentation of my MFA thesis presents my process and progress through an investigation of the relationships between humor and graphic design. Notations in the side column provide resource information and refer to appendices located in the second section of the document.

Graphic Design Archive: Masterworks Portfolio, Daniel Pocock

Theses

None provided.

A New Image Of The Mandala With Fibers, Sue-Hyun Lee

Theses

None provided.

Iisma: An Interactive Information System, Connie Winfield Harvey

Theses

None provided.

Encountered Surfaces, Hyerim Choi Min

Theses

Throughout the course of civilization man has sought to leave his marks in the form of designs. At first these were just crude scratches on stones or inscriptions on cave walls, but over the centuries he has developed many methods to his artistic sensibilities. Textile decoration is the branch of the creative arts that embraces any method of applying color or design to a woven fabric, and the maker of such decorated textiles has been an important element in cultural development down through the ages. He or she has provided man with a means of making manifest his aesthetic sentiments …

A Comparison Of Paper Whiteness Rankings: Visual Vs. Instrument Generated, Lawrence David Harris

Theses

The purpose of the study was to find if a correlation exists between a previously conducted visual whiteness ranking of 128 sheets of white office paper, from various manufacturers, and a ranking generated by affordable hand held colorimeters. Two different hand held colorimeters were used to measure the 128 sheets. The output from the colorimeters was in CIE chromaticity coordinates and CIELAB L* a* b* values. The lightness (L*) value was used to make a ranking for comparison to the visual ranking. The chromaticity coordinates were used for computing CIE Whiteness. The resulting whiteness index values were used to form …

Color Technology, Denise Rule

Theses

None provided.

The Design And Production Of The Printed Materials For The Goudy International Center For Font Technology And Aesthetics, Mark Benjamin

Theses

The increased use of personal computers in the 1980's has contributed to a sudden awareness of typefaces. This type consciousness has spread not only through the graphic arts industry, but beyond, to people who never before gave much thought to typefaces and their use. Now they are using them and making decisions regarding their use on a daily basis. Graphic artists and designers now have the tools on their desktops that give them the capability to create professional-quality digital type fonts. Even with all the attention and discussion given to the subject of typefaces, there has been no place, either …

Design Of A Hardware Efficient Key Generation Algorithm With A Vhdl Implementation, James A. Goeke

Theses

The design and implementation of a key-generation algorithm will be discussed. The steps in the procedure consist of choosing a baseline algorithm for comparison, designing a new algorithm, testing and comparing the algorithms using C language programs, and then implementing the new algorithm using VHDL. The final result of testing the algorithm implemented in VHDL will be compared to the original results obtained from the C program implementing the new algorithm. C language programs of the chosen algorithms will be developed to verify their similarity and functionality. The results will be used to decide if the new algorithm selected for …

Symbols, Mary Therese Mccann

Theses

None provided.

Virtual Reality, Education And The Macintosh, Paul Cofrancesco

Theses

The purpose of my thesis is to present Virtual Reality as a tool in aiding Education. I used the Macintosh computer as the driving base of my project, and configured inexpensive commercially available computer peripherals as input devices. I investigated the effectiveness with which virtual worlds can present information, as well as studied the use of low cost software, input devices and drivers currently avail able on the Macintosh Computer. In addition, this thesis describes the strength, weaknesses and concerns involving the use of Virtual Reality in learning and the limitations of the current technology.