Digital Commons Network^™

Optimization Of Modal Analysis And Cross-Orthogonality Techniques To Insure Finite Element Model Correlation To Test Data, Carlton Miller W.

Theses

This work summarizes the views of current authors on the multifaceted problems associated with updating a finite element model with vibration test data. It presents the practical optimization solutions for each step from pre-test analysis, through the actual vibration test, through post-test orthogonality checks and subsequent model correlation.

Desktop Publishing Applications For Corporate Graphic Standards, Patricia Beckmann

Theses

None provided.

The Aesthetics Of Healing: Joining Feminism, Autobiography, And Landscape, Patricia Elaine Chandler

Theses

None provided.

Docutech Open Job Submode Simulation, Lisa Bickerstaff

Theses

What does computer-based training (CBT) have in common with art? Artists have always striven to produce artwork under various constraints and conditions. Trying something new was considered a rebellion and artists were often criticized. Through the ages, artists have had to overcome many obstacles, including exploring the limitations presented by their chosen media. Building a visual interface for a computer in the past was left to the programmer. At the time this was acceptable, because only a programmer would look at it. Today, almost everybody uses a computer and appealing graphics are a must. The programmer from the past cannot …

Using Measured Photography To Obtain Optimal Results From Ccd Color Scanners, David L. Milburn

Theses

With the advent of desktop color scanners in the electronic prepress production environment, quality in color separations from transmissive originals has become erratic. The cause of this fluctuation is, in part, due to the transition from PMT to CCD-based scanning technology. Whereas, PMT scanners tend to have a broad dynamic range, that of CCD scanners is more limited. This characteristic adversely affects the quality of color separations by causing additional tone compression. An original transparency typically has a shadow density of 3.00 and a diffused highlight density of 0.30 for an overall density range of 2.70. On a four-color heatset …

Uaguzi, Christopher Erin Walsh

Theses

I came to RIT, for a MFA in Computer Animation, with one aim in mind: to learn 3D animation. The most difficult part about my animation theses was finding a project that would challenge all that! had learned up to this point. I didn't want to just fly the camera around objects, as I'd seen in previous theses' and three dimensional animations. That was the easy way out! I set my goals high. I wanted to see if I could bring characters to life in 3D. I wanted to take traditional two dimensional character animation techniques and apply the movement …

A Study Of Techniques To Improve The Effective Resolution Of Thematic Mapper Thermal Infrared Imagery, Ranjit Bhaskar

Theses

This work is a study of existing and proposed approaches to improve the effective resolution of the thermal band of a multispectral image. Frequency domain filtering, magnitude and phase merging, and adaptive least squares approaches were implemented. Those techniques that utilized the inherent correlation between bands appeared to show the most promise. A two step procedure combining the point-by-point merging technique with a regional replacement filter generated the best results.

A Log Neq Based Comparison Of Several Silver Halide And Electronic Pictorial Imaging Systems, Jack Holm

Theses

A protocol for determining log NEQ and a new metric, the Equivalent Image Quality or EIQ, are presented for the generalized experimental evaluation of noise related monochrome pictorial image quality. These metrics are then applied to the evaluation of a pictorial CCD camera and several pictorial films. Emphasis is placed on the development and verification of experimental techniques which do not require elaborate equipment or support facilities. Data analysis is conducted using only available software packages and personal computers. Conclusions are drawn concerning the performance of CCD based and silver halide imaging systems which allow for the objective comparison of …

Digital Camera: An Interactive Tutorial, Roger Martinez I Colom

Theses

The purpose of this thesis is to explore the possibilities of computer graphics applied to the creation of instructional projects. Chosen the topic of "basic photography", I will produce an interactive application that will teach several techniques used when learning photography. The project, fully interactive, will combine several media (computer generated images, acquired images, sound, etc.), all controlled by the computer. The main goal is to develop a proper user interface which allows any person to utilize the application. The original proposal, cited above as it had been turned in to the Department, was slightly transformed. Rather than changed, it …

An Extensible, Scalable Microprocessor Architecture, Matthew Dinmore

Theses

An extensible, scalable stack-based microprocessor architecture is developed and discussed. Several unique features of the architecture, including its non-memory oriented interface, and its use of a stack for holding and executing code, are detailed. A programmed model is used to verify the architecture, and a hardware implementation of a small-scale version of the architecture is constructed and tested. Notes for future implementations are provides. Possible applications based on the latest technological trends are discussed, and topics for further research into the architecture are listed.

From The Screen Through The Screen, Marianne O'Loughlin

Theses

This thesis project's aim is to transfer the early or beginning read er's interest and focus from the video screen; i.e.: television or Nintendo, to the printed text of the book through interaction with the computer by reinforcing the narrated story with on-screen text. Much like read-along audio tapes, the premise of this thesis is to combine pictures, words and sound into a computerized support for a story. To create interest for the proposed age group, the criteria used will be based on an entertaining tale, quest, or game, rich in language and illustration, intermixed with humor. The goal is …

A Digital Signal Processing-Based Predistortion Technique For Reduction Of Intermodulation Distortion, Richard James Buckley

Theses

Linearization of power amplifiers has been the topic of many studies, dating back to the work of H. S. Black in the 1920s. For many applications, the well-documented techniques of feedforward and feedback can be used to design low intermodulation distortion (IMD) amplifiers. However, certain applications, including the design of high-power, radio frequency amplifiers, preclude the use of these techniques. The work herein describes an alternative to presently accepted distortion reduction techniques. In-band IM distortion (multi-tone distortion located close in frequency to the desired signal) , is reduced by modifying a baseband input, upconverting this signal to the transmission frequency, …

Design And Implementation Of An Asynchronous Version Of The Mips R3000 Microprocessor, Scott Siers

Theses

The goal of this thesis is to demonstrate the feasibility of converting a synchronous general purpose microprocessor design to 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 excludes all of the memory support features of the processor for two reasons. First, the memory is already handled asynchronously and second, the size of the project must be limited. This design has implemented the entire set of instructions from the original synchronous version with the exception of certain memory instructions. The three …

Design, Fabrication And Characterization Of Infrared Filters, Samiul Amin

Theses

In-situ temperature monitoring, mapping, and control have become significant in semiconductor processes. Temperature of these processes can be measured by making use of the thermal emission from substrates in the infrared region. Various methods have been proposed to provide multicolor infrared detection. One such method involves placing segmented infrared filters close to the focal plane. The present study aims at gaining an insight into the design, fabrication and characterization of infrared filters. Filters were designed and fabricated with peak transmission at 1.5, 3.0, and 4.5 m. Extensive spectroscopic studies, using FTIR spectroscopy, have been performed in the infrared region, on …

Detection Of Planar Facets In Noisy Range Images, Ajey S. Atre

Theses

Segmentation of the image is one of the major tasks of a machine vision system designed for constructing a three-dimensional representation of the object being imaged. A robust approach for segmenting planar surfaces from range images is presented in this paper. An algorithm based on clustering through fuzzy covariance matrices, which has been proposed by Gustafson and Kessel is considered for planar segmentation. However this algorithm performs poorly if the data is noisy, which is usually the case in real life applications. In order to handle noisy data, a robust modification, based on the "noise clustering" concept, is introduced to …

Attachment Systems For Curtain Wall Construction And Maintenance Requirements, Peter S. Donaghy

Theses

Curtain Wall construction has become a familiar and widely used method for enclosing structures. Since the 1950's this type of enclosure has become increasingly the most popular choice of Designers and Builders. During this period of development, however, acceptable and uniform building standards have not evolved to create adequate quality control.

This thesis investigates some of the design requirements of Curtain Walls, in particular the attachment system, and the maintenance costs that are directly related to the attachment system and the consequences of such failures.

Laser Ablation Of Silicon Surfaces : The Effects Of A Low Level Background Light, Taposh Kumar Gayen

Theses

The performance of high speed optoelectronic and microelectronic devices largely depends on the uniqueness and development of the fabrication technology. Laser ablation has proven to be an effective three dimensional surface patterning technology. In this thesis, we present findings on the patterning of semiconductor surfaces using laser ablation in air as well as in solutions.

In this thesis, we suggest that the depth of a pattern induced on silicon by firing a pulsed excimer laser in air varies almost linearly with the number of pulses. We report that a He-Ne laser as a background light source has virtually little or …

An Analysis Of A Custom Expanding Total Femoral Prosthesis With A Rotating Hinge Knee, Ramarao Gundlapalli, V. Gundlapalli

Theses

Osteosarcoma is the most common malignant bone tumor in the pediatric age group. This thesis presents the analysis of a total femoral prosthesis implanted in a 9 year old black male. The design includes a bipolar, expanding mid-shaft component, and a rotating hinge knee used in the reconstruction of the patient's right lower limb after surgical resection of the femur. The areas being analyzed are (i) the trochanteric attachment, (ii) the expanding component, and (iii) the rotating hinge knee. The stresses acting on the cables reconnecting the greater and lesser trochanter were determined for bipedal stance, single-legged stance, stance phase …

Object Oriented Design Of Petri Net Simulator, Himanshu Juneja

Theses

Petri nets are highly useful for modeling discrete event dynamic systems. The objective of this effort is to develop a tool for drawing, editing and simulating Petri nets using object oriented programming on a standard platform. The object oriented approach was chosen because of its code reuse and extendability features which simplify the task of adding features to the tool as the model evolves. The design stresses on modeling of the problem by objects which closely relate the system design with the implementation.

C++ is used for implementing the object oriented design, and the XView toolkit is used for building …

The Development Of A Senior Unit Operations Laboratory On The Supercritical Extraction Of Solid Naphthalene With Supercritical Carbon Dioxide, Ronald G. Gabbard

Theses

A Senior level Undergraduate Unit Operations Laboratory experiment was developed for the extraction of Naphthalene with supercritical Carbon Dioxide. A Supercritical Extraction Screening System purchased from Autoclave Engineers of Erie, Pennsylvania was modified slightly for use as the laboratory equipment. The experiment consists of extracting solid naphthalene from a sand bed in a fixed bed extractor and determining the mass transfer coefficient for the unit.

The lab has been designed to allow the students to develop their own experimental plan without much direct input. The experimental outline provided for the students primarily focuses on information needed for safe and proper …

Simplification Of The Generalized Adaptive Neural Filter And Comparative Studies With Other Nonlinear Filters, Henry Steven Hanek

Theses

Recently, a new class of adaptive filters called Generalized Adaptive Neural Filters (GANFs) has emerged. They share many characteristics in common with stack filters, include all stack filters as a subset. The GANFs allow a very efficient hardware implementation once they are trained. However, there are some problems associated with GANFs. Three of these arc slow training speeds and the difficulty in choosing a filter structure and neural operator.

This thesis begins with a tutorial on filtering and traces the GANF development up through its origin -- the stack filter. After the GANF is covered in reasonable depth, its use …

Development Of An Intelligent Geometry Measurement Procedure For Coordinate Measuring Machines, Tae-Sung Kim

Theses

A Coordinate Measuring Machines (CMM) is a highly accurate electronic scale for the automatic measurement of 2 and 3 dimensional geometries. In a typical operation the CMM measures a set of user defined points, and then utilizes some internal logic to ascertain whether the inspected part meets the specifications. CMMs have received widespread acceptance among the manufacturing community, and in many instances are required as per supplier contract. Applications of CMMs vary from the measurement of simple 2D parts to complex 3D spatial frames (as for example in their use to measure the integrity of automobile frames). The primary objective …

Vibratory Size Segregation Of Particulate Matter, Anthony La Rosa

Theses

Size segregation imposed by vibration or shaking is an ubiquitous phenomenon whereby a large particle will rise to the top of a bed of smaller spheres upon vibration. Several mechanisms based on computer simulations have been proposed, however a complete theory remains elusive. The objective of this study was to perform experiments to study vibratory segregation of particles for varying size ratios and vibration parameters. More specifically, the rise time of a sphere from the bottom to the top of a vibrated bed was examined. It was found that the rise time decreased with an increase in amplitude for fixed …

Experimental Investigation Of Submerged, Turbulent, Axisymmetric Air Jet Impinging On A Flat Plate, Lan Xiao

Theses

Experimental investigation was carried out on the flow characteristics of a circular, submerged, turbulent, axisymmetric air jet impinging normally on a smooth, flat, square, Lucite plate and a sand paper covered plate. Jet issuing from a circular nozzle of 0.5 inch diameter while the Reynolds Number varying from 10,000 to 85,000 was investigated. The flow can be considered incompressible since the pressure and the velocity of the jet were not too high, with Mach Number of the order of 0.3.

Various flow parameters were measured to obtain the velocity and pressure distributions at the surface of the flat Lucite plate, …

Synthesis And Characterization Of Silicon Nitride Films Deposited By Plasma Enhanced Chemical Vapor Deposition Using Diethylsilane, Yanyao Yu

Theses

Silicon nitride thin films were deposited on silicon substrates using Diethylsilane (DES) and ammonia by Plasma Enhanced Chemical Vapor Deposition (PECVD) over a temperature range of 100 - 300°C, a pressure range of 0.2 - 0.6 torr, and a ratio of NH₃/DES was varied from 6 - 26. The R.F. power and frequency were kept at 0.15 watts/cm^{2 and 100 KHz respectively. DES flow rate was set at 15 sccm for all experiments in this study. One set of experiments were performed at different values of one parameter while the other parameters were kept constant.}

The deposition …

Investigation Of The Pl Cebus Performance With And Without Acknowledgment, Menghan Pan

Theses

The power line implementation of the consumer electronic bus (PL CEBUS) is a promising and inexpensive approach for home automation. Since the intro¬duction of the PL CEBUS standards, there has been increasing efforts on evaluating its performance. However, all the works have been performed for unacknowledged networks. This thesis presents the first successful evaluation of the PL CEBUS with acknowledment. Three different cases, namely, 600, 300 and 100 bits packet sizes, have been considered. The evaluation included the simulation of performance parameters such as message and packet delays, message throughput, and channel throughput. Acknowledged network performance has been confirmed to …

An Application Of Neural Networks To Statistical Process Control, Asterios Papaikonomou

Theses

Recent changes in the past World War II economy have produced a more educated, value driven customer. A global economy has emerged to technological advances which has made competition fierce as well as proximate. As a result, manufacturing companies are required to provide consumers with quality products at a reasonable cost. A quality product is defined as one that fulfills the needs and expectations of the consumer and provides him with a sense of value.

Since all companies want to provide quality products, the reason why poor quality is sometimes the result is not the outcome of actions for that …

Linear Ccd Motion Detection System, Thekepat J. Sudesh

Theses

The mechanical response to electrical stimuli of the human membrane represents an important area of research in medicine. A linear sensing system was designed and fabricated to measure the displacements (along a specified direction) and the frequency response of a ear membrane, the Outer Hair Cell (OHC). The output of this system was a voltage proportional to the instantaneous position of the bimorph and could be displayed on an oscilloscope.

The system consisted of optics to project the image of the vibrating membrane onto a Linear CCD Camera and electronic analog and digital circuitry which produced an instantaneous voltage proportional …

Real Time Control Of A Dual Resonator System, Penghuai Shen

Theses

An experimental multi-resonator system has been developed to study modelling and robust control of such systems in a real-time environment. The plant to be controlled consists of a pair of interconnected resonators whose resonant frequency and plant structure are known. The control objectives are to provide closed loop stability and asymptotic regulation of the frequency, gain and phase of each of the resonators. Furthermore, it is desired to use a minimal controller configuration so as to reduce implementational complexity.

The theoretical results follow directly the paper " Decentralized Robust Control of Interconnected Resonators" written by my advisor Dr. Timothy N. …

A High-Temperature Pressure Sensor Utilizing Linear Voltage Differential Transformer (Lvdt) And Silicon Wafer-To-Wafer Fusion Bonding Technologies, Robert Sylvester Okojie

Theses

A novel high-temperature pressure sensor was designed based on the principle of magnetic induction. The device is meant to correct the problems inherent in conventional Solid-State pressure transducers such as piezoresistive and capacitive at temperatures above 300°C. Prominent among these problems are increased leakage current, reduced absolute sensitivity, redistributed impurity concentration profile, and thermal mismatch.

This thesis combined the Biot Savart magnetostatic principle and the theory of deflecting clamped circular plates to obtain the microelectromechanical relationship. The problem of thermal mismatch was resolved by the symmetrical layering of a Si₃N₄/TaSi₂/Si₃N₄ sandwich, …