Digital Commons Network^™

A Multiprocessor Distributed Debugger, David Blackman

Theses

This thesis presents the design and implementation of a distributed debugger. The debugger was designed to support the debugging of a system containing multiple processors from a single debug console. The debugger implementation consists of host software which runs on a VAX minicomputer and target software which runs on Intel SDK-86 single board computers. The host and targets communicate using an RS-232 channel. The debugger supports breakpoints, disassembly of target code, symbolic reference of program procedures and variables, and download of Intel Object Module Format binary files.

Forced Plasma Oxidation Of Reactively Evaporated Indium As A Transparent Antistatic Coating For Ponyethylene Terephthalate, David Dawson Elli

Theses

Thin films of indium oxide (IO) were prepared by a three stage process involving forced plasma oxidation (FPO) of reactively evaporated indium. Applications of IO films produced using this technique include transparent, antistatic coatings for the continuous processing of polyethylene terephthalate (PET). The films were characterized by sheet resistance and optical transmittance measurements, and ESCA. Experiments were performed to determine the effect of FPO exposure time on sheet resistance Rs and optical transmittance T, which were then monitored over a one year period to determine the stability of the films. A model is developed to explain the effects of (i) …

Structuralism, Charles N. Smith

Theses

Structuralism is an interdisciplinary form of modern painting that suggests the illusion of movement and growth through the conscious manipulation of flat colors and abstract geometric forms. The practice of Structuralism involves more than a grasp of the craft of painting. The artist is required to understand and practice the laws of proportion as founded by the early Egyptians and Greeks. He must have an understanding of modern color theory and he must master and practice the laws of visual perception as stated by the Gestalt psychologist, David Katz.

I have tried to recreate the chronological development of Structuralism by …

Graphic Design Archive On Videodisc Marketing And Communication Programs, John Benton Malinoski

Theses

None provided.

A Study Of The Xerox Xns Filing Protocol As Implemented On Several Heterogenous Systems, Edward Flint

Theses

The Xerox Network System is composed of heterogeneous processors connected across a variety of transmission media A series of protocols is defined to describe the communication mechanisms between system elements. One of these protocols, the Filing Protocol, defines a general purpose file management system. Current implementations of the protocol, although derived from the Xerox specification, fall short of providing the interconnectivity between elements desired in a heterogeneous network system. The definition of an easily implemented protocol subset that provides the common file system functions of retrieval, storage, enumeration/location and deletion is derived from experiences with several implementations. This definition and …

Computer Aided Industrial Design, Chang-Young Lim

Theses

None provided.

Linkage Kinematics Sketchpad, Michael St. Jacques

Theses

During the design and creation of linkage-type mechanisms, visualization of linkage motion is extremely important. However, there does not appear to be a commercially available computer package for accomplishing visualization interactively. Most linkage design packages allow animation of linkage motion only after tedious part description (and debug) using cryptic input codes. The main thrust of this work has been the development of a prototype interactive graphics (CAD) system aimed at visualizing the motion and mobility of linkage-type mechanisms. The program is called the Linkage Kinematics Sketchpad (LKSP). It is a 2-D color graphics program which allows the user to describe …

Investigation Of The Control Information Content In The Transient Regime Input/Output Data, Matthew Strack

Theses

This report represents an analysis of the determination of the information content in a selected pair of system data points from the input/output of the plant. The given system contains a random variation condition which leads to the introduction of an adaptive control loop. A procedure for adaptive control is proposed, based upon the information content in the selected pair, for implementation in a microcomputer-based system. The determination of the selected pair as well as the adaptive control laws are based upon extensive computer simulation of the system. This computer-design technique aids in the development of "switching" conditions for the …

A Theoretical Study Of Pure And Simple Competition Between Two Microbial Species In Configurations Of Two Interconnected Chemostat, Cheng-Ming Kung

Theses

It is known that two microbial populations competing purely and simply for a common substrate cannot coexist in a steady state in an environment which is spatially homogeneous. Hence they cannot coexist in a chemostat something which implies that a mixed culture of two pure and simple competitors cannot be maintained in a single ideal reactor in a steady state. The present study investigates theoretically pure and simple competition between two populations in two interconnected chemostats. Three reactor configurations are considered and analyzed. It is proved that two pure and simple competitors can coexist in a steady state in both …

Temporal Synergy: Multi-System Animation Of Computer Generated Imagery, Chad List

Theses

Not Included

Etching And Passivation Downstream Of An O2-Cf4-Ar Microwave Plasma, Edward Matuszak

Theses

None provided.

Cmos Analog Transmission Gate Design, Cynthia S. Bell

Theses

CMOS technology has provided an integrated circuit equivalent for the conventional electromechanical switch: the transmission gate. CMOS analog transmission gates degrade signals passed through them with noise due to gate clock feedthrough transients. A SPICE parameter model for the Eastman Kodak CMOS process has been developed and timing requirements for feedthrough cancellation in typically structured transmission gate devices have been studied. An alternate device structure for improved performance is proposed.

Measurements Of Basic Semiconductor Properties, Abdolreza Ariantaj

Theses

Mobility, resistivity, and total impurity concentration of several purchased p-type silicon samples with known resistivities were measured by Hall effect, experiments utilizing the Van Der Pauw method. The silicon samples will serve as Hall effect standards for future measurements on other semiconductor materials, particularly gallium nitride ion cluster beam (ICB) deposited thin films. The samples which were Freshly etched with hydrofluoric acid had measurement values of 455 cm ² / V.sec, 45.9 Ω cm, and 2.6 X 10¹⁴ cm³ for mobility, resistivity, and total impurity concentration, respectively. The mobility values were within 9.9 per cent, of the published values …

Substructuring Analysis For Impact Dynamics Using Ansys Finite Element Package, Chang Ho Cho

Theses

This thesis is intended to serve as an introductory guide to ANSYS finite element package for the analysis of impact dynamics. Substructuring technique has been used to reduce the degrees of freedom.

Finite element method is essentially a numerical technique to calculate elastic deformations. However, by introducing some techniques like gap element, the technique can be easily extended to rigid body dynamic analysis. To solve the equation of motion both for rigid body and elastic deformations, direct integration technique is used in this thesis, i.e., Houbolt method.

ANSYS is a large scale general purpose computer program for finite element analysis. …

Systems Building Theory Application Within The Residential Housing Construction Market, Gary Alexander Newhard

Theses

The primary purpose of this report is to introduce the economical value in utilizing certain "systems building" applications. In this report I focus on integrated system methodologies that encourage residential building economy and submit such systems as a viable alternative to traditional labor intensive housing construction. The consumer market that could be particularly enhanced by these systems ranges from low income to middle income and the by-product would be classified as "affordable" housing.

This report focuses on the New Jersey real estate market and presents certain prefabricated housing systems as an economical means of meeting the large demand for residential …

Introductory Guide To Bridgeport Series I Cnc Milling, Drilling And Boring Machine, Apurva Vinodchandra Doshi

Theses

This thesis is intended to serve as an easy introductory guide on how to work with Bridgeport Series I CNC Milling, Drilling and Boring machine. An attempt has been made to make the subject matter simpler to give the reader a good start in programming and operating this machine

The spectrum of technological implementation of CNC machine tools is extremely broad,. Companies utilizing advanced technologies such as computer graphics, DNC and Group Technology are in this field for some time. Even small shops are getting equipped with CNC machine tools. The present CNC systems, which are less costly, more reliable …

Principle Causes Of Changes In U.S. Productivity, Harris Kamah Forkpa

Theses

Productivity growth in the United States has taken a downward trend since the nation entered the decade of the 60s. This issue is contemporary because its consequences are apparent in every American industry. Government, business and individuals are equally affected because prices continue to escalate. Hence, the cost of living appears to be unmanageable. Several factors have contributed to the slump in United States productivity growth. The most important of these factors are low capital investment, strained management and labor relationships, insufficient research and development spending, low employee motivation, the attitude of organized labor unions, lack of national commitment, high …

Utilization Of The Microcomputer To Improve The Productivity Of Small Manufacturing Companies, Hung-Gi Chang

Theses

The ongoing microcomputer development has led to its increasing application in manufacturing to reduce costs and improve productivity. Being more aware of this technology, most of these benefits have accrued to large firms. The intent of this thesis is to show that it is equally advantageous for small manufacturing companies to utilize them and show how they can do so.

The paper discusses the role and characteristics of microcomputers. Available software to do engineering designs, materials requirements planning, process planning, and master production scheduling is described. Using a case study a method that can be followed in selection and implementation …

Cybernetic Theory Applied In Production Control, Ding-Hsin Fang

Theses

There are many theories for the control of production. Also. there are many successful cases for each of the different theories.

Cybernetic theory is quickly evolving as a design basis for management control systems. Cybernetics is the science of self-regulation and its basic tenents are control, or the ability to direct action toward a predetermined goal, and communication, or the ability to send and receive information.

The objective of this thesis is to identify and discuss this theory applied to the management techniques of production control for a Far Eastern textile firm and to investigate the extent that the firm …

The Dielectric Slab-Wedge Antenna, B. Keith Christensen

Theses

A theoretical model and numerical investigation of the directive gain of a dielectric slab-wedge radiator is presented. The model is based on a union of the classical dielectric slab equations, local mode theory, and equivalent current distribution treatments of the truncated dielectric slab and wedge geometries.

The far field is developed from the sum of two current distributions. The slab region, up to the transition plane between slab and wedge, is replaced by equivalent electric and magnetic surface current densities. The wedge contribution is developed from a volume polarization current distribution.

Conservation of power is used to approximate the field …

Preparation And Testing Of Novel Blocked Isocyanate Dental Adhesives Based Upon Hydroxyhexylmethacrylate, Gururajan Rao

Theses

In this study dental adhesives synthesised from TDI/HHMA/pentaerythritol, with either of the blocking agents namely eugenol, o-methoxyphenol, p-cresol or o-chlorophenol were tested. Bond strengths in dentin as influenced by spacer molecules were tested. Comparison studies to determine this were performed using the same blocking agents and TDI/HEMA/pentaerythritol. The effects of i. post-extraction time and ii. dentin depth on bond-strengths were tested using two monomers: o-methoxyphenol/ TDI/HEMA/pentaerythritol and p-cresol/TDI/HEMA/pentaerythritol 1. From teeth recently extracted (2h) vs dentin aged from one to six months 2. From dentin cut from three different levels within the tooth.

The prepared dentin-adhesive samples were stored in …

Effects Of Physical Exertion And Caffeine Ingestion On Mental Performance, Alireza Shafiei

Theses

Stresses in man-machine systems can be broadly classified as (1) physical and (2) mental. Both types of stresses generate some kind of response in the human body. These responses could be physiological (quantitative) or behavioral (qualitative). While the physical stresses mostly create physiological changes, mental stresses may cause physiological and/or behavioral changes. The purpose of this study is to investigate such influences, and try to determine if stimulants such as coffee have any effect on people's ability to perform tasks involving a combination of physical and mental elements.

An attempt has been made to describe an interrelationship between physical exertion …

The Effects Of Platelet Activating Factor (Paf) On The Arteriolar Average Blood Velocity And Volumetric Flowrate In The Microcirculation Of The Hamster Cheek Pouch, Patricia Ann Shatynski

Theses

The effects of platelet activating factor (PAF) in vessel diameter, average red blood cell (RBC) velocity and volumetric flowrate were studied in twenty-four arterioles located in the cheek pouches of nine male syrian golden hamsters. The observed vessels were between 8-32um in diameter. These vesgs were subdivided further into two groups: 8-17um and the 21-32um group. Fluorescein isothiocyanate (FITC) labeled cells were injected into the hamster to act as velocity tracers. Immediately prior to and for a total of 60 minutes after the topical application of 10^-7M and 10^-9M PAF, selected arterioles were video taped periodically …

Isoparametric Finite Elements For Axisymmetric Solids, Ramanand R. Shetty

Theses

The finite element formulation of axisymmetric plane stress analysis is used to develop a computer program for numerical implementation. The basic relations used to derive the finite element equations for a solid continum are reviewed in the thesis. The programming organization is summarized and program list is given in Appendix.

The program portion for isoparametric elements are borrowed from Numerical Methods in Finite Element Analysis by K. J. Bathe and E. L. Wilson, and various other subroutines are used from Mr. Huang's thesis on Micropolar elasticity analysis. Mr. Huang's computer program is based on the work done by Dr. Nakamura …

Ray And Beam Representation Of The Glancing Phenomena, Michael Sotiriou Vogas

Theses

Asymptotic ray theory (ART) is a widely used method dealing with problems of wave propagation in an inhomogeneous medium. The main deficiency of ART is in transition regions where rays near caustics, glancing and critical incidence fail to represent the actual wave field. Ray bundles in such transition regions have been successfully replaced with modal bundles and remainders El] in well defined profiles. However , in practical problems it is difficult to implement modal representations and almost impossible to express remainders. Recently emerging Gaussian beam method (GBM) has shown promising results in representing the total field produced by a source …

Multi-Channel Arrhythmia Analysis In The Clinical Exercise Electrocardiogram, Shi-Xiong Yang

Theses

This thesis studied methods of using 2 channel ECG signals for noise elimination and arrhythmia detection. Clinical data were recorded from patients stress tests and were stored on diskettes for off-line processing. Spatial velocity vector and noise estimation methods in addition to analog and digital filters were combined to remove the noise produced from different sources. Feature extraction and matched filter methods were employed for classification of normal and abnormal QRS complexs, while rhythm computing was used in addition for PVCs and other arrhythmia discrimination. This algorithm was tested on clinical stress test recordings and a computer simulated arrhythmia recording …

Plate Stress Analysis By The Finite Element Method, Wen-Jung Chuang

Theses

The finite element formulation of plate elasticity is presented and is employed in the development of the formulation of element stiffness equations. The programming structures are also summarized.

The finite element program PLATE cited from Prof. J. N. Reddy's " An Introduction to the Finite Element Method " has been used to solve the plate bending problems with quadrilateral elements. The problems solved are:

(1) deflections and stresses in a circular plate with all edges simply supported under uniform load.

(2) deflections and stresses in a circular plate with all edges clamped under uniform load.

each case including four different …

Chebyshev Approximate Solution For Stiff Problems, Kwo-En Hoh

Theses

Chebyshev polynomial and collocation methods are adapted to solve general ordinary differential equations ( initial-value problems and boundary-value problems ). Approximate solutions of initial-value problems are obtained in step-by-step fasion. the solutions have minimax absolute error in the interval and correct values at the end points. The approximate solutions of boundary-value problem will be continuous on the whole domain and have piecewise Chebyshev approximation characteristics in each subinterval of the chosen partition.

In Vitro Comparative Hydrodynamic Study Of Heart Valve Bioprostheses Under Accelerated Fatigue Conditions And Under Physiological Conditions, Mario Cincinat Iosif

Theses

The present study involves the use of an accelerated fatigue testing system*, and a pulse duplicator (heart simulator)*, to evaluate the hydrodynamic characteristics of cardiac bioprostheses.

The hydrodynamic performance of these prosthetic valves is compared when tested using each machine, in order to assess the determining conditions that exist for each case, and try to correlate them.

Pressure drop and pulsatile flow across valves are measured, using a real-time on-line data acquisition system, which includes, in addition to the fatigue tester and the pulse duplicator, a DC amplifier, an analog-to-digital converter and a digital microcomputer. Special acquisition software has been …

Microcomputer Local Area Network Interface, David W. Juan

Theses

A Microcomputer Local Area Network Interface system for use in the study of Local Area Network has been built and tested. The special feature of the system is data transmission/receiving and error detection/recovery. The system adapted the International Standards Organization (ISO) Open System Interconnection COSI) model. It used the star topology and implemented the physical layer, data link layer and network layer. The results of the system indicated the data communications and resources—sharing between microcomputers.