Digital Commons Network^™

Implementation Of An Activity Coordinator For An Activity-Based Distributed System, Robert Shaw

Theses

Distributed computing systems offer a number of potential benefits, including: - improved fault-tolerance and reliability - increased processor availability - faster response time - flexibility of system configuration - effective management of geographically distributed resources - integration of special purpose machines into applications In order to realize this potential, support systems that aid in the development of distributed programs are needed. An Activity System facilitates the design and implementation of distributed programs: (1) By allowing the programmer to group functionally related objects into an activity (or job) which is recorded within the system. The information stored concerning relationships between objects …

Database Machines In Support Of Very Large Databases, Mary Ann Kuntz

Theses

Software database management systems were developed in response to the needs of early data processing applications. Database machine research developed as a result of certain performance deficiencies of these software systems. This thesis discusses the history of database machines designed to improve the performance of database processing and focuses primarily on the Teradata DBC/1012, the only successfully marketed database machine that supports very large databases today. Also reviewed is the response of IBM to the performance needs of its database customers; this response has been in terms of improvements in both software and hardware support for database processing. In conclusion, …

History And Criticism Of Photographically Illustrated Children's Books, Debora J. Bork

Theses

None provided.

Importance And Implementation Of Explanation In Expert Systems, Kurt R. Heilbronn

Theses

Explanation is crucial in persuading others of the correctness of our beliefs to gain acceptance of our conclusion. Early research into expert systems focused on methods for reasoning. However it became apparent that the ultimate success lay in the ability to gain user acceptance by explaining the reasoning behind the conclusion. This study examines explanation from a social and an implementation standpoint. The social aspects of explanation provide insight into the role of naturally occurring explanations and listener expectations. Examination of research expert systems with explanation facilities and modifications of a simple Prolog expert system shell demonstrate the techniques required …

Colorpalette: A Knowledge-Based System To Select Colors For A Palette, Penny Bauersfeld

Theses

This paper describes ColorPalette, a knowledge-based system to advise users in selecting colors for a palette used for computer screen design applications. Color selections and advice are based on principles of human computer interface design and color theory, gathered through both research and knowledge acquisition from a human expert. The user may put together various color combinations to form acceptable and successful palettes. The system consists of a color data-base of facts formulated from an HSV color model, a knowledge base that can reason about these colors and their relations to each other, and a set of rules based on …

Computer Graphics And The Harvard Interactive Videodisc Project, David B. Marshall

Theses

Not Included

Photographic Work 1986-87, Peter Ainsworth Carter

Theses

Not listed.

Microprocessor Controller For A Multi-Targets System, Shoeineng Lin

Theses

This thesis presents a microprocessor controller for a multi-targets system, which is designed by a direct digital control in the modern computer-aided manufacture system. It is made up of digital control theory, computer hardware configuration and software algorithm. An example is illustrated by IBM PC/XT computer. In this example, the control laws of three simple targets are developed and implemented by C-language. Simultaneously, the computer self-test routines, such as CPU, ROM etc, are developed by intel-8088 assembly language.

Application Of Computer Techniques In Groundwater Contamination Studies, Komratchi Raman

Theses

A study has been undertaken to provide insight into two related aspects of groundwater contamination studies - contaminant transport behavior and its analysis by modeling techniques. The study reviews recent research that explains some of the uncertainties in the transport and fate of chemical contaminants in groundwater. Approaches to modeling techniques and data reduction are developed to illustrate their usefulness in analysing existing groundwater data, and to make predictions on the future water chemical characteristics. Three types of study areas have been chosen for this purpose, each representing a different type of groundwater contamination problem. The first study area has …

Graphic Design Archive On Videodisc: Graphic Access, Sister Alma Mary Anderson C.S.C.

Theses

Not Included

Robotization For Assembling Small Parts, Frank J. Valese

Theses

The thrust of this paper is directed toward establishing a roboticized small parts assembly line where none currently exist. Technical and pragmatic requisites were established and reviewed prior to installing the proposed robotic workcell. Although the specific model chosen for discussion is the locksmithing industry, the procedures followed, the design tools utilized, and the methods of job-costing employed apply equally to other small parts industries.

Basic industrywide considerations reviewed for each robotization effort included:

1. Choosing the proper application for robotization
2. Obtaining management support and labor input to insure the success of the project
3. Deciding on the economic and production goals …

Comparison Of Color Lightness In Two-Color Plus Black Reproduction Systems Vs. Three-Color Reproduction Systems, Lonnie Jackson

Theses

A theory that has existed since 1948 has just recently gained wide acceptance from the printing industry. The recent technological advancements in electronic scanners has made it feasible for color separations to be scanned implementing Gray Component Replacement (GCR) . Eventhough most of the electronic scanners today have GCR capabilities, some questions regarding GCR and its implementation have gone unanswered. In an attempt to help resolve this problem, this paper investigated the issue of lightness characteristics associated with GCR reproductions. In particular, this paper attempted to prove that, by replacing a graying component of a conventional reproduction made up of …

Design And Implementation Of A Local Area Network Utilizing Intel 310/80286 Systems, James Leach

Theses

The goal of this work was to provide the foundation for a course in networking by developing the hardware and software for a token ring Local Area Network (LAN). Any course work in networking would focus on the emerging International Standards Organization (ISO) Open Systems Interconnections (OSI) model. This model provides a seven layered structure, where each layer performs some logical aspect of the communication process. Thus, the software developed would have to provide the functionality of a multiple layered design, implying multiple tasks communicating by operating system primitives. Also, a simplified design would minimize the time for those students …

A Mathematical Analysis Of An Electronic Dot Generating Scanner For Dot Resolution And Tone Reproduction, Frederick K. Waechter

Theses

An electronic dot generating scanner is a complex machine. This complexity is based in the photographic methods which the scanner is designed to duplicate. This study addresses the mathematical principles of the entire scanner system. This paper was intended to provide an improved understanding of the scanner system. The hypothesis states that a mathematical analysis with experimental verification can be developed to accurately model the internal optics, tone reproduction, and output dot characteristics of an electronic dot generating scanner. The analysis begins with a functional block diagram, which shows the information flow through the scanner. This diagram breaks the process …

Productivity Through People : The Hewlett-Packard Way, Charles Serwedes

Theses

Petri nets have become a powerful tool for modeling and analyzing asynchronous concurrent systems. In this thesis I apply Petri nets for analyzing and modeling a flexible manufacturing workstation (FMS). A manufacturing workstation is modeled by using Colored- Timed Petri nets, with the consideration of tool handling, raw materials, quality checking and the reuse of reworkable scraps. A simulation program for a simplified Petri net model of manufacturing workstation is described and the production throughput is computed.

Reactions Of Atomic Hydrogen With Dichloromethane In A Flow System, Shun-Hsien Huang

Theses

The reaction kinetics of atomic hydrogen with dichloromethane were studied in a tubular flow reactor with 2.6 cm I.D. Pyrex tube at pressure of 2.1 to 2.7 torr absolute and room temperature . Hydrogen atoms were generated by a microwave discharge plasma. Atomic hydrogen concentration were measured by chemiluminescence titration with nitrogen dioxide. The concentrations of hydrogen atom ranged from 2.0 * 10¹⁴ to 5.0 * 10¹⁵ atoms per cm³. Chlorocarbon reagent and products were monitored by online gas chromatography (FID).

Major products observed were hydrogen chloride and methane. The conversion of dichloromethane increases first to …

Reaction Of Hydrogen With Methylene Chloride And Carbon Tetrachloride At High Temperature, Hun Tsao

Theses

The reactions of methylene chloride and carbon tetrachloride in hydrogen in the temperature range 500 - 1000° C were studied using tubular flow reactors of three diameters. (ID: 0.40, 1.05, 1.60 cm). Residence time range was from 0.3 to 3.5 seconds. Temperature profiles of the reactors was kept within +/- 5° C of central 85% for the 18 inch long reactor, at a total pressure of 1 atmosphere. No chlorinated hydrocarbon products were observed at or above 950° C. The major products in this temperature range were CH4, C2H₂, C2H₄, C2H₆ and HCl.

The pseudo …

Establishing And Utilizing The Concept Of Socio-Technical-Spatial Systems In The 21st Century Work Environment, Asmita Gami

Theses

Productivity is an important aspect of work environment in a market economy. It depends on the integration of the efficiency of the technical system, the social structure of the organization as well as the spatial environment. The relationship of productivity to the spatial environment within the changing work environment is the primary concern of this research. The research attempts to identify where we are now in terms of our understanding of productivity and its relationship to the work environment as well as the historic evolution that has brought us to this stage. In addition, this project attempts to explain the …

Development Of An Off-Line Robot Programming System For Computer Control Of Ge P50 Robot, Subhas Vitthal Shetty

Theses

The General Electric P50 Robot has Teach Pendent Programming facilities. It is provided with a Computer Linkage - a communication control unit, but is not eguipped with any software which uses this linkage to communicate data between the computer and the P50.

A study was made of many Robot Programming systems existing today. The facilities a programming language should have was noted, and a Robot-Level Programming System was developed, which remote controls the P50 robot.

The program is written in TurboPascal and is developed on IBM PC/AT for communication between the P50 and an IBM PC Compatible Personal Computer. The …

Evaluation Of Word Processing Cost Effectiveness, Nicholas E. Tedesco

Theses

The objective of this thesis is to examine the use of word processing technology to determine if its implementation is a cost effective investment. This will be accomplished by comparing the cost of a typewritten page before and after the implementation or upgrade of word processing equipment. The degree of utilization and the impact of utilization on standard costs will also be examined.

Significant difficulty was encountered attempting to locate and compile statistical information on word processing. Therefore, a questionnaire was developed and distributed to the 100 largest public and 100 largest private companies headquartered in New Jersey, requesting information …

Application Of Robots In Developing Countries, Badi Uddin

Theses

The increasing versatility of robots has led to their use in a widening range of applications. The robot population is growing at a remarkable pace. The increase in the use of robots in industry has changed the standards of productivity and quality. During past years, as labor costs has risen, safety and environmental regulations have been changed to provide more benefits to workers and capabilities of robots became more sophisticated. Therefore, robots became a valuable piece of production equipment.

Now, robots are able to perform all kinds of hazardous and heavy duty jobs which are harmful to human life or …

Land Cover Classification Of Landsat Thematic Mapper Images Using Pseudo Invariant Feature Normalization Applied To Change Detection, Tim Hawes

Theses

A radiometric normalization technique for compensating illumination and atmospheric differences between multi-temporal images should allow classification of the images with a single classification algorithm. This allows a simpler approach to land cover change detection. Land cover classification of Landsat Thematic Mapper Imagery with and without Pseudo Invariant Feature Normalization was performed to demonstrate the effect on classification and change detection accuracy. A post-classification change detection method using two separate classification algorithms, one for each date, was performed as a baseline comparison. Land cover classification using one classification algorithm was attempted with and without gain and offset correction to serve as …

Deuterium Isotope Effects On In Vitro Dealkylation Of 1,1-Dimethylhydrazine And 1,1-Dimethylnitrosamine Via Hepatic Enzymes, Robert Sloane

Theses

Boiling 1,1-dimethylnitrosamine or unsymmetrical dimethylnitrosamine several times with 25% NaOD in D2O promoted the complete exchange of the nitrosamine’s alpha protons for deuterium. The deuterated nitrosamine was reduced by LiAlH4, in anhydrous diethyl ether to the corresponding 1,1-dimethylhydrazine-d6. An in-process production of the oxalate salt was necessary due to the air sensitivity of the free base hydrazine. After recrystallization from absolute ethanol and extensive drying, the oxalate salt was evaluated for purity by mixed melting point, high performance liquid chromatography and thin layer chromatography. When protonated hydrazine-oxalate salt (mp=146 °C) was mixed with a sample of the exchanged hydrazine salt …

Reactive Ion Etching Of Polyimide Films Using A Radio Frequency Discharge, James G. Fagan

Theses

None provided.

Computered-Aided Digital Filter Design And Simulatio, Pao-Tsan Chiang

Theses

The simulation is written by C language on AT&T Unix pc 7300 environment, some fundamental mathematics is introduced in the beginning, then digital filter specification method: window, frequency sampling, equiripple are discussed, and Kaiser window method is discussed in details for programming.

There are many problems are met in my simulation, such as F.F.T. aliasing, leakage, Picket fence convolution, correlation, but solutions are proposed.

The result could be output data and graph, GSS_Drivers graph package is utilized, because consideration of operation speed and convenience are emphasized, speed is compromised, but easy to be restructured.

A Dsp Toolkit For The Unix/C Environment Of The Pc 7300 Compute, Suwutchai Jesdanun

Theses

The Digital Signal Processing (DSP) TOOLKIT is a package of programs designed to use the fast Fourier transform (FFT) and display its output responses in graphics form. This tool provides three different window functions and five data modifiers for filter designing and spectrum analysis. Flexible features for modifying the plottings, such as y-axis auto-scaling, xy-axis scaling and center line adjusting of the graphics display, are included.

All programs are written in C programming language for the UNIX System Environment of the UNIX PC 7300 computer. The program structure of DSP TOOLKIT is designed so that modules can be added or …

A Prognostication Of Just-In-Time Efficacy In American Manufacturing, Mark L. Kahan

Theses

"Just-in-time" is a Japanese philosophy of business management which has as its ideal the complete elimination of waste in the process of adding value to a product. Some experts have contended that its basis is not cultural, but technical, and is thus applicable to American manufacturing concerns. After an initial exploration of economics and productivity concepts, and of U.S. logistics, inventory, and purchasing practices, the matter of Just-in-time will be addressed, both theoretically and in terms of Japanese business and labor relationships and culture. Then, based upon a case study consisting of observations made at a traditional American manufacturer, this …

Thermal Decomposition Of Dichlorobenzene In An Atmosphere Of Hydrogen And Helium, Mingta Hung

Theses

Reactions of dilute mixtures of dichlorobenzene in hydrogen and in helium were studied in a tubular reactor at a pressure of 1 atm, residence times of 0.04 to 2.7 seconds, and temperature range of 825 to 1000° C. Product distributions at various reaction conditions are measured with a flame ionization detector gas chromatograph, and qualitative analysis of batch samples was also performed by GC/Mass Spectrometry. The major products were observed as the thermodynamically stable species, HC1, Cis), benzene and chlorobenzene. Thermal reaction in helium at 1 second residence time in 1.05 cm ID reactor yielded less benzene and chlorobenzene when …

Implementation Of Inverse Multiprofile Streak Technique, Brian Edward Fuchs

Theses

The inverse multiprofile streak technique is a new measurement technique available to researchers and was implemented to better achieve measurements on detonation phenomena. This technique provides the wave front geometry around the perimeter of an explosive charge through the use of multiple slits placed on the charge and a high speed streak camera. Testing, analysis, and methodology for this technique are presented in order to provide information to interested researchers. A personal computer program and sample tests are included to illustrate the method used.

Comparison Of The Mid-Frequency Line Edge Noise Algorithms Of Jim Hamerly And Yigal Gur For The Best Correlation To The Psychophysical Defect Known As Raggedness, Kevin Huff

Theses

A study was conducted to compare the mid-frequency line edge noise algorithms of Jim Hamerly and Yigal Gur. Comparisons were made to determine which algorithm correlated best with the psychophysical defect known as raggedness. Tests were conducted on "standard" observers using a series of test images with varying amounts of edge noise. A master image was produced photographically and ensuing images generated with random error using electrophotographic processes. Scanning of the images to determine output metric values was done on a Zeiss microdensitometer. It was found that with electrophotographic prints, the Hamerly algorithm has a correlation coefficient of .83. Determination …