Digital Commons Network^™

No Revelations, Mark C. Tierney

Theses

None provided.

Investigation Of Observer Variability Using A New Method For Determining Color Matching Functions, Amy D. North

Theses

The Munsell Color Science Laboratory has developed a new method for determining color matching functions. It relies on a mathematical model that expresses color matching functions as the product of linear transforms of the cone action spectra and variable transmittances of the lens and macula for each observer. With this model, the full spectral tristimulus functions can be computed from a minimum of five visual matches. A visual colorimeter was designed to implement the MCSL model. The current instrument utilizes CRT primaries and seven interference filters to make matches to simulated daylight in a 2 bipartite field. The system was …

Development Of A Modular 2-Micron Bicmos Process From An Existing 2-Micron N-Well Cmos Process, R. Michael Guidash

Theses

A modular 2-micron BiCMOS process was developed from an existing 2-micron N-Well CMOS process. The process maintains compatibility with the existing 2- micron CMOS design rules and design library, meets the NPN device parameter targets supplied, and utilizes present manufacturing operations and equipment, with a minimum number of additional masks and steps. NPN transistor parameter targets were determined from intended technology applications. Process integration options are introduced and evaluated. A procedure for process latitude determination and process optimization is presented.

A Common Application Model For Interfacing With Advanced Program To Program Communication/Vm, Joseph Viviano Jr.

Theses

The Merrill Lynch data processing environment is composed of a conglomeration of applications which reside on various platforms. LAN and minicomputer based applications coexist with those making their home in the mainframe arena. Unfortunately, coexistence does not imply cooperation, data uniformity, data centralization or coordinated application development. Within the Merrill Lynch mainframe arena alone there are two operating systems which reside across several computing complexes, MVS (Multiple Virtual Storage) and VM (Virtual Machine). Critical business applications and data are unique to each of these environments. The problem lies in the need for cooperative processing and sharing of distributed data among …

Disc Size Scale-Up In Rotating Biological Contactor System, Chi-Sheng Chang

Theses

Disc size scale-up of prototype and small-scale RBC plants are successfully developed by applying the 114 data sets obtained from 12 RBC plants to the evaluation of percent sBOD remaining. These data analyses are performed by the least square method, therefore, the scale-up factors of the prototype and the small-scale are determined at different hydraulic loading. Furthermore, the relationship between scale-up factor and the disc diameter are established under the given flow rate, the number of stages, and the number of discs. A group of Curves are obtained and can be utilized for the full-scale RBC plant preliminary design. The …

Delay Performance Of Cebus And Modified Cebus Schemes, Altaf Hussain

Theses

In this thesis the performance of the CEBUS (Consumer Electronics Bus), a local area network proposed by the Electronics Industries Association for the 'Smart House,' is analyzed under varying network load and traffic patterns that would occur in a typical home environment. Reduced complexity versions of the CEBUS scheme are compared with the standard CEBUS scheme.

It was found from simulation analysis that the delay in the CEBUS network, at a given network bandwidth, is dependent upon the message priority and the traffic pattern in the network. It was also observed that the performance of a modified CEBUS scheme was …

Biodegradation Of Phenol And 4-Chlorophenol Using A Single Species In A Sequencing Batch Reactor, Kung-Wei Wang

Theses

Biodegradation of phenol and 4-chlorophenol (4CP) using Pseudomonas putida (ATCC 17514) was studied in batch and sequencing batch reactors. Batch experiments were first performed in order to reveal the kinetics of biodegradation for each substrate. 4-Chlorophenol was degradable only in the presence of phenol, or immediately after exposure of the organism to phenol. It was postulated that an enzyme induced by the presence of phenol was necessary to initiate degradation of 4-chlorophenol.

A mathematical model was then developed to describe the dynamic behavior of both substrates in a sequencing batch reactor (SBR). The model utilized rate parameters obtained from batch …

Development Of Technology For Glass Shaping By The Use Of Abrasive Water-Jet, Li-Yuan Shih

Theses

This study is to investigate the effects of AWJ properties on the results of glass machining and to develop a practical procedure for prediction of these results of abrasive waterjet (AWJ) machining. The use of glass in engineering and Abrasive Waterjet Cutting Technology are introduced. A practical technique to prevent defects and to improve the quality of the glass surface is suggested. A earlier parameter introduced, Exergy Distribution Density (EDD), is used in order to characterize the cutting conditions.

It was found that besides of EDD the results of machining are affected by the particles' destruction in the course of …

Determination Of Impeller Pumping Capacity From Laser Doppler Anemometer (Lda) Measurements In An Agitated Vessel, Mark Iamonaco

Theses

The purpose of this thesis was to study fluid mixing by determining impeller pumping capa cities from measured velocities in a mixing tank. Mean velocity measurements were made with the use of a Laser Doppler Anemometer (LDA) . The LDA was operated in the dual beam mode, with polystyrene spheres as seeding material. Studies were conducted with a 6 blade radial impeller and a 3 blade axial impeller. From velocity measurements, impeller pumping capacities were calculated for the above impellers. Impeller pumping capacities are correlated for varying impeller speeds at various measurement positions. The obtained results have been compared to …

Costume As Art, Gretchen Lapp Hamlin

Theses

Any given article of clothing can be seen as falling somewhere along a broad continuum that stretches between the completely functional and the completely decorative. On one end of the spectrum, utility dominates; military clothing, designed to promote uniformity and to maximize human performance, might define this extreme. On the opposite pole, function is totally disregarded in favor of pure adornment, even flamboyance - say, Carmen Miranda's hat.

Radiation From The Cylindrical Dielectric Taper, Tor-Odd Hoydal

Theses

The radiation problem of the cylindrical dielectric taper, excited by the HE₁₁ dominant mode, is studied. A theoretical model and a numerical investigation into the radiation characteristics of such a tapered structure are presented. The model is based upon the combination of the exact modal field solutions for a step profile cylindrical dielectric waveguide, Local Mode Theory, and the Equivalence Principle for the determination of equivalent current densities.

The far-zone radiation field is considered to be the summation of the fields produced by two radiative components in the dielectric rod/conical structure: The "aperture" of the uniform dielectric rod at …

A Pen-Based Computer For The Delivery Person, Gwo-Chyuan Chen

Theses

None provided.

Optimization Algorithms For Shortest Path Analysis, Susan M. Hojnacki

Theses

Discrete optimization algorithms exist for analysis of network optimization of flow problems. Computer programs written from these algorithms can be used for local area network analysis of point-to-point computer networks, transportation networks, resource allocation, distribution, and production scheduling. One aspect of a network that can be optimized using discrete optimization algorithms is the length of the path that data will take when traveling through the network. One node in the network signifies the source node and a second node is the sink or destination. The object is to find the shortest path between the two nodes. The definition of shortest …

Formation Of Low Temperature Silicon Dioxide Films Using Chemical Vapor Deposition, Hsiao-Hui Chen

Theses

Low Temperature Oxide (LTO) thin films were prepared using a Low Pressure Chemical Vapor Deposition process. The process was characterized by applying traditional statistical studies and response surface technique. The uniformities within wafer and from wafer to wafer were examined by determining the mean and the standard deviation of films thicknesses. Response surface methodology was employed to determine the optimum process conditions. Time, temperature and gas flow ratio were used as the experimental factors. Index of refraction and deposition rate were used as the experimental responses. Additionally, etch rate, density, dielectric constant and infrared (IR) spectra were found for the …

Design And Simulation Of A Primitive Risc Architecture Using Vhdl, Evangelos Moustakas

Theses

Hardware Description Languages are used as the connecting links between the design of a digital system and the way this design is being represented in computers, with the ultimate goal being the simulation and verification of that design before the construction of any prototype. In this thesis, we follow all the steps of a RISC architecture design and finally use VHDL as the tool to describe, simulate and verify the design. By the unique abilities of VHDL we give both a structural and a behavioral description where the latter contains multiple description levels, from gate to Processor-Memory-Switch (PMS) . The …

Partnering: A Constructive Approach To Obtaining Engineer-Architect Services For The 1990s And Beyond, Donald E. Nations

Theses

This thesis will focus on a method of doing business in which two companies, whose businesses are complementary, work together in a relationship that strives to benefit both.

Large corporations continually examine ways to constructively manage the vast concept of change, and maintain their competitive posture. One way in which some corporations are beginning to strengthen their assets and their capabilities to deliver products or services is through a relationship known as "partnering."

As an oversimplified way of defining partnering, in a business-to-business relationship, one firm specializes in providing a service required by another company that the latter may not …

A Comparison Of Reliability Prediction Methodologies To Observed Field Failure Data, Randal Butturini

Theses

Reliability predictions of electronic equipment are considered highly valuable; yet the most widely used technique, Military Handbook 217 is criticized as inaccurate. The industry response to the Handbook has been to develop a myriad of methodologies for failure rate prediction. This paper uses four (4) reliability prediction methods to forecast the failure rate of two (2) circuit boards for which a field failure history exists. The predicted failure rate for each procedure on each board is compared to the actual failure rate; and a first-order correction factor is calculated.

Biodegradation Of Diflufenican Using Anaerobic Microbial Consortia, Velukumar T. Nanjagowder

Theses

In this thesis I examine the feasibility of using anaerobic microbial consortia from digested anaerobic sludge to degrade Diflufenican, a fluorinated herbicide released into the environment as a result of agricultural usage. The compound is manufactured by Rhone Poulenc and it is an active ingredient of agricultural herbicides. The anaerobic digested sludge served both as a source of microorganisms and as a growth medium. Initial studies were conducted by making a stock solution of 1 ppm concentration of Diflufenican in acetone, the optimal solubility of the compound as suggested in the material safety data sheet is 0.05 ppm in water. …

Performance Of The Extended Token Bus Network With Asymmetric Load Distribution, Hong Lin

Theses

The Token Bus, IEEE 802.4, provides high priority message options. The delay of high priority messages becomes an important criterion in the design and management of computer communication networks. A goal of the protocol is to allocate sufficient bandwidth and frequency of access to minimize of the high priority message delay. In this study, a simulation model of a priority based network, consisting of two token bus networks interconnected by a bridge is implemented. The load distribution among stations is asymmetric and the messages are divided into two priorities, high and low. Both fixed and variable token token holding times …

The Electronic Interpreter For The Deaf, Young-Jun Ko

Theses

None provided.

Computational Analysis Of Space Transfer Vehicle Engine Turbopump Diffuser Design For Deep-Throttling, Gordon J. Wissinger

Theses

Space Transfer Vehicles (STV) are expected to perform missions (orbital transfer, Lunar/Mars transfer and descents) which will require deep-engine throttling thrust capability. To accomplish this, turbopumps which can efficiently provide a wide range of flow outputs are needed. The current state-of-the-art cryogenic fuel and oxidizer turbopump designs do not perform efficiently at off-design flow rates mainly due to stall and flow separation in the diffuser. This thesis examines how boundary layer control techniques can be used to control, reduce or eliminate diffuser flow separation. A finite element based code, FIDAP, was used to study flow in a diffuser by developing …

The Dynamics Of A Moving Boundary Between Immiscible Fluids In A Porous Medium, John Mccarvill

Theses

The analysis and simulation of the dynamics of a moving boundary between immiscible fluids in a porous medium is presented. One fluid is introduced under prescribed inlet boundary conditions and the motion of the resulting interface boundary is studied. The aforementioned scenario is simulated using a finite element based software, FIDAP. Analytical solutions developed in one dimension illustrate the concepts and serve as a benchmark for numerical solutions. The aim of computer simulation is to develop a model applicable to real situations, yet flexible enough for future adaptations to other problems with little modification.

An Investigation Of The Potential Mobility Of Gold Ions In Core/Shell Silver Bromide Emulsions, Thomas Scarsella

Theses

The degree to which non-localized gold ions migrate to the surface from the core of a silver bromide core/shell octahedral emulsion in the absence of sulfur sensitization is investigated. An octahedral core emulsion is precipitated in an oxidized gelatin environment, sensitized with gold, and covered with an additional layer of silver bromide. It was postulated that the migration of gold might be detected by a significant increase in the surface speed of the emulsion due to the catalytic enhancement of latent image formation typified by gold, and an increase in the tendency of the system to form developable sites on …

Substitution Of The Statistical Range For The Variance In Two Local Noise Smoothing Algorithms, Marc R. Lapointe

Theses

The statistical range was substituted for the variance in local noise smoothing algorithms proposed by Tomita and Tsuji, and by Nagao and Matsuyama in order to reduce computer processing time. Images of low, medium, and high information content were corrupted by two levels of combined additive and multiplicative noise and were processed by the original and modified algorithms for both the uncorrelated and correlated noise cases. A subjective paired comparison was performed on the resulting images based on four evaluation criteria, and a normalization of the data between observers as well as hypothesis testing were carried out. Under the conditions …

The Search For The Active Site Configuration Of Glutamate Dehydrogenase I) Reactivity Of Lys-126 Ii) Preparation Of O-Se-Nadp+, Deborah Judd

Theses

None provided.

Fugitive Pieces/Pink, Jo Dagon

Theses

None provided.

A Parameterized Cmos Standard Cell Library And A Full 8-Bit Grey Scale Morphological Array Processor, Lawrence H. Rubin

Theses

The creation of a parameterized, full custom CMOS VLSI design library is discussed. This library consists of a schematic component library that is integrated with both logic and circuit level simulators, as well as a corresponding layout cell library that is integrated with automatic place-and-route tools as well as several layout verification tools. The library enabled the design and implementation of a Morphological Array Processor (MAP). This VLSI chip fully implements the morphological operations of erosion and dilation using a 7x7 matrix. It will operate on a 512x512 image in real time (60 images per second). The chip is designed …

Thermal Stresses In Closed Spherical Shells, Frank W. Keene

Theses

The purpose of this work is to discuss thermal stresses in closed spherical shells. This effort is further limited to linear thermoelastic stresses in "thin" shells. The basic concepts associated with three-dimensional continuum mechanics are presented in both direct and general tensor notation. The three-dimensional equations are reduced to the two-dimensional equations of shells under going finite displacements. These are subsequently reduced to those pertaining to spherical shells. A review of the recent literature associated with thermal stresses in spherical shells is included. An appendix is provided which reviews some of the basic elements of general tensors.

Colorimetric Tolerances Of Digital Images, Mike Stokes

Theses

An environment to derive colorimetric tolerances of images was established and an experiment using this new environment was performed. This environment allows for images to be digitally captured, colorimetrically manipulated, displayed, observed, and statistically evaluated. The visual experiment measured perceptibility and acceptability colorimetric tolerances for images using paired comparison techniques. Thirty-two observers judged six typical photographic scenes displayed on a high resolution color monitor. These scenes were manipulated using ten linear and nonlinear functions in the CIELAB dimensions of lightness, chroma, and hue angle. The tolerances were determined using probit analysis. It was found that scene content did not significantly …

Hydroboration Of Strained Cyclopropane Ring Systems Promoted By Wilkinson's Catalyst, Kevin W. Gillman

Theses

None provided.