Digital Commons Network^™

Characterization Of Dc Reactive Sputtered Indium Tin Oxide Thin Films, Philip Infante

Theses

Indium tin oxide (ITO), sometimes referred to as tin doped indium oxide, is a widely used transparent conductor due to its ability to offer higher conductance and better etch ability over other transparent conductors. ITO has been utilized as transparent electrodes in liquid crystal displays and heterojunction solar cells, as transparent heat reflecting films, as the sensing medium in gas sensors, and in optoelectronic device applications. In general, these films are characterized by high transparency in the visible spectra, high reflectance in the IR and absorption in the UV regions, and near metallic conductivity. Although the desired characteristics of the …

Characterization Of The Radiometric Performance Of An Ir Scene Projector, Gary Ralph

Theses

A quantitative evaluation of a self-emitting far IR scene simulator is performed. The simulation system is comprised of a white-light source, spatial light modulator, optics, and a visible-to-infrared transducer. The performance was evaluated by measuring the MTFs of the system and sub-components and the thermal contrast. An attempt to correct variations in the radiometric response across the scene is done by modifying pixel values. Additionally, the effect of cooling the infrared transducer on the thermal contrast is investigated. Results are compared to a previous system which used a coherent light source.

Characterization Of Spatial Texture For Use In Segmentation Of Synthetic Aperture Radar Imagery, Eleni J. Paliouras

Theses

This study examined the use of textural analysis to assist in the segmentation of synthetic aperture radar (SAR) imagery. A previous study, which dealt with imagery collected passively by electro-optical systems in the visible and infrared portions of the electromagnetic spectrum, tested a method of identifying optimal subsets of texture features from a large pool of possibilities. Three new features were added to this pool and tested against the others to determine their specific utility in the segmentation of SAR imagery. Their value is demonstrated by consistent appearance in optimal subsets of texture features, and by their contribution of up …

Design, Graphic Arts, And Environment, Sondra Zalewski

Theses

The environment draws great attention today from many people and businesses. Some companies are beginning to play off these concerns in their marketing approach, while others dodge the topic at all turns. While many people feel we have serious environmental problems, others do not. It is a subject with which everyone is, perhaps, too hasty in their judgment. This thesis project encourages behavioral awareness and provides information from a multitude of sources so that a practical, rather than radical, view may develop. Information surrounding issues about the environment appear in many diverse publications. The sources of information, as well as …

A Hybrid Voice/Text Electronic Mail System: An Application Of The Integrated Services Digital Network, Andrew Mcbride

Theses

The objective of this thesis is to present a useful application for the Integrated Services Digital Network (ISDN) that is expected to one day replace the analog phone system in use today. ISDN itself and its continuing evolution are detailed. The system developed as a part of this thesis involved the creation of an inexpensive "phone terminal" that can serve as an ISDN terminal and also as a bridge to a Local Area Network (LAN). The "phone terminal" provides a hybrid electronic mail system that allows the attachment of speech to text within a message. Messages created with this "phone …

Simulation Of Simultaneous Heat And Moisture Transfer In A Porous Media With Heated Boundries, Kim Thomas

Theses

A one-dimensional, time transient, heat transport model is developed using the heat equation to solve for the internal temperature distribution with heating from both boundaries. The model includes the effects of moisture on heat transfer within a homogeneous porous medium, in this case paper. The effects of phase change, conduction, and vapor transport are included. With the input of system properties - initial paper temperature, ambient relative humidity (RH), and temperature boundary conditions - the model computes the spatial distribution of temperature, saturation and vapor pressure, and liquid and vapor moisture content. By matching temperature curves for various conditions of …

Testing Chromatic Adaption Models Using Object Colors, Elizabeth Pirrotta

Theses

The objective of this research was to determine which published chromatic adaptation model performed best under a single set of conditions. Previous research has been conducted to study chromatic adaptation, develop models and to indirectly test those models. This research directly tested the performance of these models using printed, simple-field, object colors through a successive-ganzfe/cf haploscopic, paired comparison, matching experiment. The chromatic adaptation models tested were CIELAB, CIELUV, Fairchild '91, Hunt '91, LABHNU2, Nayatani et al. '90 and von Kries. The test illuminant was incandescent at 231 lux. Model predictions were calculated for the reference simulated daylight at 2,396 lux. …

Plasma Modification Of Poly(Ester Sulfonic) Acid Aniomoneric Membranes, Linda Slapelis

Theses

The effect of variations in plasma parameters on the fluorination, degradation, and etching of poly(ester sulfonic) acid (AQ55) anionomeric membranes was examined. The determination of how the plasma gas composition, power, proximity of the sample to the glow, and time of exposure could be used to maximize surface fluorination and minimize degradation of polymer films is discussed. Membrane surfaces were characterized using contact angles, SEM, gravimetric analysis, DSC, FTIR/MIR, and XPS. These techniques aided in the determination of changes in surface energy, surface topography, sample weight, bulk property, and the identification and quantification of chemical functionalities produced at the AQ55 …

A Hardware Approach To Neural Networks Silicon Retina, Arif K. Golwalla

Theses

The primary goal of this thesis was to emulate the function of the biological eye in silicon. In both neural and silicon technologies, the active devices occupy approximately 2 percent of the space, wire fills the entire remaining space. The silicon retina was modeled on the distal portion of the vertebrate retina. This chip generates, in real time, outputs that correspond directly to signals observed in the corresponding levels of the biological retinas. The design uses the principles of signal aggregation. It demonstrates a tolerance for device imperfection that is characteristic of a collective system. The digital computer is extremely …

Daedalus: Cockpit Flight Management System, Jeffrey Paris

Theses

The purpose of this thesis was to design a portable computer-based flight management system for general aviation pilots.

Rapid Thermal Processing Of Polysilicon Emitter Transistors, Diane Mauersberg

Theses

The recent developments in rapid thermal processing in the past several years have shown it to have much potential in achieving full dopant activation of implanted junctions with a limited amount of junction depth movement. Its application to polysilicon emitter transistors allows for the formation of very shallow emitter-base junctions and narrow base widths with far greater activation capability than conventional furnace processes. A process for polysilicon emiter transistors utilizing rapid thermal annealing has been developed. Furnace processing at 875 C; and rapid thermal processing for 20 seconds at 950 C, 1000 C, and 1050 C was performed to anneal …

Vhdl Modeling And Design Of An Asynchronous Version Of The Mips R30000 Microprocessor, Paul Fanelli

Theses

The goal of this thesis is to demonstrate the feasibility of converting a synchronous general purpose microprocessor design into one using an asynchronous methodology. This thesis is one of three parts that details the entire design of an asynchronous version of the MIPS R3000 microprocessor. The design includes the main architectural features of the R3000: the 5-stage pipeline, the thirty-two 32-bit register bank, and the 32-bit address and data paths. To limit the size of the project, the memory and coprocessor are excluded. Therefore, this design has implemented the entire set of instructions from the original synchronous version with the …

Interiors, Dana Ranke

Theses

None provided.

Type Pictures: The Life And Work Of Albert Schiller, Michael Keefe

Theses

None provided.

Delicate Intimacies, Jeanne Marie Ferraro

Theses

None provided.

A Theoretical Study Of The Semiconductor Laser Structures With Lateral Discontinuity In The Optical Cavity, Yi Cai

Theses

A theoretical study of the semiconductor laser structures with lateral discontinuity in the optical resonant cavity is presented in this thesis. Specifically, the lateral discontinuity is referred to the lateral expansion structure newly invented for increasing the power output of semiconductor lasers while keeping single mode operation.

In the first part of the thesis (Chapter 2 and Chapter 3), an explicit expression for calculating the lateral discontinuity problems is formulated by the incorporation of mode-matching method. Our approach is based on the mode expansion theory developed for lossless micro-wave and optical fiber waveguides, but the effect of gain in active …

External Cavity Laser Power Stabilizer, Jie Ding

Theses

In this thesis, we want to design a stabilizer which does not depend on laser source--with external cavity.

In the first part of the thesis ( Chapter 2 and 3 ), we discuss the wave propagation in crystals and the modulation of optical radiation. From the main two types electro-optic modulations, Phase Modulation and Transverse Modulation, we know that the transverse modulation shows an increase in the frequency limit or useful crystal length of (1-c0/ncm)^-1, and we will use this type modulation in this thesis.

The second part of the thesis is the procedure of design and experiment. …

Machining Of Silicon Wafers With An Abrasive Water Jet Cutter, Frank J. Marciniak

Theses

This thesis consists of a study of the effects of abrasive water jet cutting on brittle silicon substrates. In total, 26 different cuts were made in a single crystal silicon substrate with an abrasive water jet cutter under different conditions of water flow, water pressure, and abrasive flow rate. These cuts were analyzed for surface roughness, and microstructure.

The roughness measurements were compared in order to determine the best possible cutting conditions. The cut with the best roughness of 0.000170 inches was obtained under cutting conditions of 30 KSI water pressure, 1 inch/minute cutting speed, and an abrasive flow rate …

Development Of A Non-Intrusive Particle Motion Tracking Technique For Granular Flow Experiments, Jerry R. Volcy

Theses

Implementation aspects of monitoring the position and orientation of a one-inch diameter particle in space non-intrusively based on the principle of magnetic induction coupling are discussed. A radio-transmitter embedded within the particle induces voltages in receiver antennae. Position and orientation of the particle are deciphered from these voltages. A previously developed math model that predicts the voltage induced in an antenna given the position and orientation of the transmitter with respect to the antenna as well as the numerical techniques used to obtain the inverse solution of computing position and orientation from a given set of voltages are used.

Practical …

Fluid Flow Modeling For Pneumatically Fractured Formations, Deepak Nautiyal

Theses

This thesis investigates the flow of compressible fluids in pneumatically fractured formations. Pneumatic fracturing is a recently developed technique for increasing permeability in geologic formations by the controlled injection of high pressure air. The artificially induced fractures enhance the flow rate of liquids and vapors in the subsurface, and can be applied to in situ remediation of hazardous waste sites, and for other hydrogeological applications.

A flow model for discrete fractures is derived based on the assumptions of viscous, laminar fluid flow through planar fractures (Poiseuille type flow). The model takes into account non-linearity introduced by gas compressibility effects. Provision …

Performance Of National Research And Education Network While Transmitting Healthcare Information Data, Bhavesh Mahendra Shukla

Theses

National Research and Education Network(NREN) is a first step in the process of building a National Information Infrastructure(NII). NII will ultimately lead to Broadband Integrated Services Digital Network(B-ISDN), a network which will support global exchange of voice, data, images and video.

NREN will evolve out of present National Science Foundation Network (NSFNET), also known as Interim NREN. At present NSFNET operates at 45 MBits/sec. By 1996, there are plans to boost the data rate to 155 MBits/sec and to 620 MBits/sec by the turn of century.

In this thesis, present actual NSFNET is simulated using software simulation tool Networkll.5. The …

Bio-Oxidation Of A Model Voc In Air, Jeong Seop Shim

Theses

This study was performed to find a satisfactory regime of operation for the vapor phase bio-oxidation of ethyl alcohol, a model volatile organic compound (VOC), in a specially designed bioreactor. Ethanol was selected as a model compound representing bakery oven gas pollution. A spirally wound bioreactor module was used within which was immobilized a mixed bacterial culture from aerobic sludge. The activated sludge from municipal wastewater treatment plants readily attached with no pretreatment on the surface of the spiral biosupport which is a polymeric sheet.

The parameters studied were air flow rate and inlet concentrations of ethanol. Ethanol was injected, …

Design And Simulation Of A Multichip Module, Mathew Nazareth

Theses

Electronic packaging has undergone basic changes in the last few years to keep up with an ever increasing demand for speed and miniaturization. Multichip Modules (MCM) represent a class of advanced packaging technologies. This thesis examines various MCM technologies and their relative advantages and disadvantages. Further, the design process for an MCM is presented in detail. The physical design and simulation for the performance ( electrical and thermal) is also detailed. A design example ties together all the issues that are relevant to the design of an MCM.

The Floral Ploy "Pieced, Painted, Printed", Shannon Pfaff

Theses

The purpose of this thesis is to take a complex concept and redefine it visually. The theory of brain evolution has been, and will continue to be in debate both scientifically and spiritually. Since the brain, or the mind, is the center of thought, it seems fitting that a search for unity begin here. Art and science, art and religion, science and religion, are not at opposite ends. Reason and emotion, instinct and intellect, power and surrender, can come together and exist in harmony. It is the goal of this thesis to explore how, through examining the inner workings of …

A Study Of Gray Level Recording Capability For A Reflective Six Bit Desktop Scanner, Julio E. González

Theses

A common problem with CCD sensors is their inefficiency to accurately record gray level information in the shadow range of an image. This problem is magnified on original copy having important detail in the midtone to shadow range. Consequently, when this type of an image is scanned gray levels in the shadow range of the reproduction are not easily discerned. This study examines two areas, the recording consistency across the scanning sensor and the gray level recording for a desktop six bit scanner. The former determined how consistently density information is recorded across the sensor, while the latter determines the …

Comparison Study Of Proofing Systems, Ravi Raj Adukambarai

Theses

The following study was an attempt to compare two methods of proofing, namely, a toner based method and a film based method, in terms of colorimetric variation. The study was limited to AE readings taken from five color patches off a standard test target, the colors being Cyan, Magenta, Yellow, Flesh-Tone, and Red. AE is a measure of the color difference of a sample from a known standard. Thirty proofs were made by each method using the same set of separation films and colorimetric readings taken from each proof for each of the colors mentioned above. A statistical comparison was …

A Layout Algorithm For Hierarchical Graphs With Constraints, Michael Slade

Theses

A new method is developed for reducing edge crossings in the layout of directed graphs for display. The method will reduce edge crossings in graphs which have constraints on the location or movement of some of the nodes. This has not been available in previously published methods. An analysis of the strategies used to choose rank pairs for edge crossing reduction shows that this choice will dramatically affect the amount of crossings eliminated. This method is directly applicable to the reduction of edge crossings in the general graph.

Response Of U.S.A. Owned Hotels To The Drug-Free Workplace Act Of 1988: A Case Study, Yun-Min Ha

Theses

Alcohol and drug abuse has been causing tremendous problems in American workforces everyday. The misuse of alcohol and drug finally lead the government to react to the problems. In March 1989, Drug-Free Workplace Act of 1988 went into effect, establishing the goal of a drug-free workplace. The purpose of this study is to find out how 14 major U.S. owned hotels are responding to Drug-Free Workplace Act of 1988. In order to find out, a 10 item questionnaire was developed and used to interview human resources executives. From the sample of 14 hotels, 11 hotels (78.5%) responded. The survey results …

A Decision Model: Contract Vs. In-House Foodservice A Case Study: Rochester Riverside Convention Center, Mark Poole

Theses

Not listed.

Strategic Planning For A Private School: A Case Study, Kathleen Vollmers

Theses

Park Christian School is a private interdenominational Evangelical Christian School located in Moorhead, Minnesota. During the 1993-94 school year, 321 students were enrolled in grades K through 8 with the majority from Moorhead or Fargo, North Dakota. These children represent about 206 families and 39 area churches. In the fall of 1993, the School Board authorized a strategic planning process using professional planning facilitators to lead the planning team which would include teachers, members of the School Board, members of the Finance Committee, and parents.