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2008

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Computional Modeling Of Precision Molding Of Aspheric Glass Optics, Balajee Ananthasayanam Dec 2008

Computional Modeling Of Precision Molding Of Aspheric Glass Optics, Balajee Ananthasayanam

All Dissertations

In this dissertation, research in two parallel directions is presented; the first involves the prediction of the final size and shape of a glass lens during a precision glass lens molding process and the second introduces a method to compute and quantify the importance of higher order terms in fracture mechanics for different modes of fracture.
The process of precision lens molding has received attention in recent years due to its potential to mass produce aspherical lenses. Aspherical lenses have significantly better optical properties and conventional lens making techniques are limited to manufacturing of spherical lenses only. The conventional technique …

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Estimation Of Emergency Room Visits: Implications For Uninsured In South Carolina, Anusha Pokuri Dec 2008

Estimation Of Emergency Room Visits: Implications For Uninsured In South Carolina, Anusha Pokuri

All Dissertations

This study assesses the relationships between the percentage of emergency room visits, the percentage of uninsured population, and socio-demographic characteristics. This is accomplished by developing linear models of the relationships among these variables for the 46 counties of South Carolina for the year 2000. The results showed that the percentage of non-White population and percentage of business establishments that employ fewer than 50 workers had significant positive influence on the percentage of uninsured population. The median household income and high percentage of population with educational attainment beyond high school had a significant negative influence on the percentage of uninsured population. …

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Theoretical And Practical Implications Of A Hedonic Pricing Model: Empirical Observations From Wholesale Automobile Auctions, Jeffrey Roach Dec 2008

Theoretical And Practical Implications Of A Hedonic Pricing Model: Empirical Observations From Wholesale Automobile Auctions, Jeffrey Roach

All Dissertations

Wholesale auto auctions are convenient structures for economists as they attempt to observe the marginal effects of quality changes on the market-clearing price. However, what may be categorized as a quality change might rather be a market signal of an environment with adverse selection. This dissertation analyzes the effects of seller type and tests their sensitivity to econometric model specification.
General hedonic attributes and their various applications are reviewed. This dissertation explores the basic auto auction environment and dispels inaccurate notions about the auction structure. Following Bartik's (1987) analysis, multi-market data are used to produce hedonic estimates for seller, mileage …

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Development And Evaluation Of A Minimally Invasive Sampling Technique To Estimate The Age Of Living Birds, Crissa K. Cooey Dec 2008

Development And Evaluation Of A Minimally Invasive Sampling Technique To Estimate The Age Of Living Birds, Crissa K. Cooey

Graduate Theses, Dissertations, and Problem Reports (ETD)

Using pest species in initial studies of pentosidine (Ps) aging research for birds may be the catalyst to discovering more effective population control strategies for pest, invasive, and hard to manage birds. Pentosidine is an irreversible, stable, fluorescent, collagen cross-link, created through the Maillard reaction, which has been found to accumulate throughout the lifetime of an organism in various body parts such as skin, lens crystalline, and dura matter. Pentosidine assays are more accurate at determining the age of adult birds in comparison to plumage coloration, eye and mouth color, feather wear, and molt sequences due to the discovery that …

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Software Process Control Without Calibration, Oussama El-Rawas Dec 2008

Software Process Control Without Calibration, Oussama El-Rawas

Graduate Theses, Dissertations, and Problem Reports (ETD)

Software process control is important for large enterprise since it is essential for software project management. Boehm [10, 12--15, 20] argues that the best way to do software process control is reusing old proven models (e.g. COCOMO for effort, COQUALMO for defects, etc) while tuning them to local data in order to obtain accurate estimates. This however suggests that historic data is available related to the use of these models in previous software projects. This is not the case, as the availability of relevant historic data related to the use of the above models in a specific software environment is …

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Applications Of Asymmetric Allylation Reactions Towards Natural Product Synthesis, Philip R. Harsh Dec 2008

Applications Of Asymmetric Allylation Reactions Towards Natural Product Synthesis, Philip R. Harsh

Graduate Theses, Dissertations, and Problem Reports (ETD)

A short asymmetric synthesis of (R)-(+)-Goniothalamin oxide was developed and synthesized using a Leighton asymmetric allylation reaction and Grubbs ring-closing metathesis. (R)-(+)-Goniothalamin oxide is a styryl lactone that exhibits anti-cancer activity against a variety of cancer cell lines including MCF-7, T47D, and MDA-MB-231. The methododology of asymmetric allylation is also demonstrated on intermediates of RK-397, which is a 32-membered oxopolyene macrolide with anti-cancer activity.

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Effects Of The Antimicrobial Agent Triclosan On Bacterial Resistance To Disinfection In Wastewater Treatment Processes, Meilin Liu Dec 2008

Effects Of The Antimicrobial Agent Triclosan On Bacterial Resistance To Disinfection In Wastewater Treatment Processes, Meilin Liu

Graduate Theses, Dissertations, and Problem Reports (ETD)

2-(2,5-Dichlorophenoxy)-5-chlorophenol or Triclosan is a widely used antimicrobial agent included in a multitude of products, such as soap, toothpaste, and personal care products.;The objective of this research was to investigate the effects of Triclosan on the resistance of activated sludge bacteria to conventional disinfection processes applied in wastewater treatment processes, such as chlorination and UV.;Specific Aim 1. A complex bacterial community collected from an active sludge was acclimated over several sub-cultures in the presence of different concentrations of Triclosan (from 0.0 to 20 mg L-1) and then exposed to sub-lethal doses of chlorine and UV irradiation. Determination of bacterial viability …

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Development Of A Low Cost Controller And Navigation System For Unmanned Ground Vehicle, Shashidhar Muppidi Dec 2008

Development Of A Low Cost Controller And Navigation System For Unmanned Ground Vehicle, Shashidhar Muppidi

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this research was to develop an Unmanned Ground Vehicle (UGV) which is capable of autonomously navigating to user specified Global Positioning System (GPS) waypoints. For rapid design and testing of the UGV, it was initially designed in a distributive approach using independent commercial off-the-shelf (COTS) computing modules for control and sensing. Autonomous navigation behavior of the UGV was tested to analyze the strengths and weaknesses of the UGV design, using digital compass for heading and GPS for location measurements. The UGV waypoint navigation has been observed to be consistent for smooth terrains. Uneven terrains, however, posed a …

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Effect Of Interface Fields On The Piezoelectric Response Of Aluminum Nitride Thin Films, John P. Harman Dec 2008

Effect Of Interface Fields On The Piezoelectric Response Of Aluminum Nitride Thin Films, John P. Harman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Group III-Nitride wide bandgap semiconductors have attracted much attention in the optoelectronic and electronic research areas recently. III-Nitride semiconductor materials are attractive materials for use in optoelectronic and high speed electronics devices because they are direct bandgap semiconductors and the bandgap can be varied over a wide range. It has also been shown that the III-Nitride group of materials function exceptionally well in harsh environments. The piezoelectric properties of the III-Nitride material system have been studied and several of the III-Nitride compounds have been found to have non zero piezoelectric coefficients. This work shows that the observed piezoelectric coefficient of …

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Application Of Cathodoluminescence And Quantitative Color Analysis To The Study Of Glass For Forensic Purposes, Heidi D. Nawrocki Dec 2008

Application Of Cathodoluminescence And Quantitative Color Analysis To The Study Of Glass For Forensic Purposes, Heidi D. Nawrocki

Graduate Theses, Dissertations, and Problem Reports (ETD)

Forensic analysis of glass has traditionally relied on the use of refractive index (RI) measurements and physical methods for matching. The current study utilized cathodoluminescence (CL) spectroscopy, combined with RI and quantitative color analysis. CL is a phenomenon that occurs when light is emitted from a material upon electron bombardment. Scanning electron microscopy coupled with CL detection was used for analysis. Standard glass samples from NIST were used for method development, while samples obtained from the Crime Scene Complex at West Virginia University and headlight glass samples from Jordan Auto Parts in Pennsylvania were used to evaluate the method. Additionally, …

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Caveolin-1 Recruitment To The Trailing Edge Of Motile Cells Results In Focal Adhesion Disassembly And Nascent Interaction With Actin Stress Fibers, Andrew Beardsley Dec 2008

Caveolin-1 Recruitment To The Trailing Edge Of Motile Cells Results In Focal Adhesion Disassembly And Nascent Interaction With Actin Stress Fibers, Andrew Beardsley

Graduate Theses, Dissertations, and Problem Reports (ETD)

The protein caveolin-1 has been shown to positively affect angiogenesis and vascular remodeling in vivo via studies using knockout mice. In fact, defects in these two processes are among the major hallmarks of an otherwise benign caveolin-null phenotype. Current dogma on the function of caveolin-1 does not predict or account for these deficits. The overall objective of the following studies was to uncover the role of caveolin-1 in angiogenesis and vascular remodeling through study of the protein in cell-substratum remodeling during cell motility in vitro.;In the first study, caveolin-1 and its parent organelle, caveolae, conspicuously polarize to the rear of …

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Effect Of Dietary Lysine And Genetics On Indices Of Energy And Protein Metabolism In Rainbow Trout And Alterations In The Mitochondrial Proteome In Broilers Fed A Lysine-Deficient Diet, Stephanie K. Pomeroy Dec 2008

Effect Of Dietary Lysine And Genetics On Indices Of Energy And Protein Metabolism In Rainbow Trout And Alterations In The Mitochondrial Proteome In Broilers Fed A Lysine-Deficient Diet, Stephanie K. Pomeroy

Graduate Theses, Dissertations, and Problem Reports (ETD)

How an organism reacts to consuming a lysine deficient diet was examined in two different circumstances. First, the responses of ten different genetic lines of rainbow trout were observed while consuming a lysine-deficient (LD) diet, used to mimic a soybean meal-containing diet. The aquaculture industry is investigating the incorporation of soybean meal into carnivorous fish diets to alleviate the need for fishmeal. If soybean meal is incorporated into the diet, an assessment of the genetic strains of fish used in the aquaculture industry today must be performed since differences in genetics have been shown to effect growth. When compared to …

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Identifying Genomic Signatures For Predicting Breast Cancer Outcomes, Shruti Rathnagiriswaran Dec 2008

Identifying Genomic Signatures For Predicting Breast Cancer Outcomes, Shruti Rathnagiriswaran

Graduate Theses, Dissertations, and Problem Reports (ETD)

Predicting the risk for recurrence in breast cancer patients is a critical task in clinics. Recent developments in DNA microarrays have fostered tremendous advances in molecular diagnosis and prognosis of breast cancer.;The first part of our study was based on a novel approach of considering the level of genomic instability as one of the most powerful predictors of clinical outcome. A systematic technique was presented to explore whether there is a linkage between the degree of genomic instability, gene expression patterns, and clinical outcomes by considering the following hypotheses; first, the degree of genomic instability is reflected by an aneuploidy-specific …

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Measurement Of Short-Wavelength Electrostatic Fluctuations In A Helicon Plasma Source, Robert Aaron Hardin Dec 2008

Measurement Of Short-Wavelength Electrostatic Fluctuations In A Helicon Plasma Source, Robert Aaron Hardin

Graduate Theses, Dissertations, and Problem Reports (ETD)

The principle objective of this work is to determine if short wavelength fluctuations capable of heating ions are excited in helicon sources at the same plasma parameters for which anomalous ion heating has been observed in helicon sources. A portable 300 GHz based, coherent Thomson scattering (CTS) diagnostic, employing both quasioptical propagation and a homodyne detection scheme, was designed and installed on the HELIX source to measure fluctuations with wavelengths on the order of 1 mm. While testing a new antenna designed to directly excite finite k⊥ electrostatic waves in conjunction with a new electrostatic double probe, spontaneously occurring excited …

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Complex Stimulus Control In Humans: Merging Functional And Equivalence Classes, Harold E. Lobo Dec 2008

Complex Stimulus Control In Humans: Merging Functional And Equivalence Classes, Harold E. Lobo

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation investigated the merging of functional and equivalence classes produced by training responding to either simple or conditional discriminations. Experiment 1 targeted the acquisition of three three-member equivalence classes featuring class-specific reinforcers and three three-member functional classes each controlling the occurrence of a nonsense vocal response. Four female college students completed testing for the targeted stimulus classes. Two subjects demonstrated class-consistent emergent responding, but only one of them maintained class-consistent responding across repeated testing. This student withdrew from the experiment before class merging was arranged. Experiment 2 simplified and expedited the procedures for producing independent emergent classes. Four female …

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Electrical And Optical Properties Of Zinc Oxide For Scintillator Applications, Xiaocheng Yang Dec 2008

Electrical And Optical Properties Of Zinc Oxide For Scintillator Applications, Xiaocheng Yang

Graduate Theses, Dissertations, and Problem Reports (ETD)

Zinc oxide (ZnO) is a wide-band-gap semiconductor suitable for many optical and optoelectronic applications. Among these is to use single crystal, powder, or ceramic forms of ZnO as a fast UV scintillator. In this work, the electrical and optical properties of ZnO were studied using photoluminescence, X-ray-induced luminescence, optical absorption, and Hall Effect techniques. This study included single crystal ZnO and ZnO:Ga samples grown from high-pressure-melt (HPM), seeded chemical-vapor-transport (SCVT), and hydrothermal (HYD) techniques; powder samples synthesized using both solution and solid-state processes, and purchased from different commercial sources; and ceramic samples prepared by hot-uni-axial-pressing and spark-plasma-sintering methods. Temperature-dependent PL …

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Effects Of Rate Of Feedback And Reinforcement On Novel Responding, Vennessa L. Walker Dec 2008

Effects Of Rate Of Feedback And Reinforcement On Novel Responding, Vennessa L. Walker

Graduate Theses, Dissertations, and Problem Reports (ETD)

Ten middle-school students were assigned to receive feedback and token reinforcement either every 1 min (HR) or every 15 min (LR). Subjects used a computer program to learn to perform 5 basic algebra skills at high rates and high accuracy. Subjects were yoked with a partner for practice so that each member of the pair completed the same number of items per skill. Subjects were provided with cumulative review worksheets and then were tested for distraction, adduction, and retention. Results suggest that HR facilitates faster acquisition of skills as well as better performance on cumulative reviews, distraction, and retention tests. …

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Strategies Of Prevention: Extending The Concept Of Preventive War And Understanding Its Implications, Steven T. Walker Dec 2008

Strategies Of Prevention: Extending The Concept Of Preventive War And Understanding Its Implications, Steven T. Walker

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation contributes to the literature on prevention in two specific ways. First, it broadens the concept of preventive war, developing the idea that dominant states have a choice when it comes to dealing with rising challengers. The choice is not a dichotomous variable of either war or no war. Instead, there is a range of choices that decision makers within the dominant state have at their disposal. This dissertation examines the relationship---over time---between two conflictual states, one in relative decline and the other in relative ascendance, and studies the response of the dominant but declining power. Second, I focus …

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Participation In Accelerated Reader Programs And Reading Pursuit In 11th Grade, Heather E. Boucher Dec 2008

Participation In Accelerated Reader Programs And Reading Pursuit In 11th Grade, Heather E. Boucher

Graduate Theses, Dissertations, and Problem Reports (ETD)

Teachers and researchers continue to seek ways to build positive attitudes about reading and effective ways to promote robust reading interests. Some schools have implemented the reading software Accelerated Reader (AR) with these goals in mind. The purpose of the present study was to analyze the effects of long-term participation in the activities of AR on reading attitude and reading pursuit. Participants were 206 eleventh-grade students from the mid-Atlantic Region. The Estes Attitude Scale (Estes, 1969) and Title Recognition Test (Pavonetti, Brimmer, and Cipielewski, 2000) served as measures of reading attitude and reading pursuit, respectively. Data analyses indicated no effects …

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Interactions Between Teachers And Students In Four Co -Taught, Inclusive, Middle School Classrooms, Nancy G. Burton Dec 2008

Interactions Between Teachers And Students In Four Co -Taught, Inclusive, Middle School Classrooms, Nancy G. Burton

Graduate Theses, Dissertations, and Problem Reports (ETD)

Co-teaching in inclusive, content classrooms is becoming increasingly more popular as schools work toward the inclusion of significantly more students with special learning needs in the general education environment. Inherent in every classroom environment is the expectation of teacher-student interactions. It is often the relationship between the teacher and the student that provides opportunities for student achievement and success. The daily interactions that occur between teachers and their students set the tone for the successes and failures that may be realized as a result. The purpose of this study, therefore, is to explore and identify both the context and frequency …

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Investigation Of Lubricant Oil Consumption And Its Contribution To Particulate Matter Emissions, Sam George Dec 2008

Investigation Of Lubricant Oil Consumption And Its Contribution To Particulate Matter Emissions, Sam George

Graduate Theses, Dissertations, and Problem Reports (ETD)

The global objective of this study was to determine lubricant oil consumption as a function of engine operating conditions, and determine its contribution to particulate matter (PM) emissions in a hydrogen-fueled engine. Hydrogen offers a promising alternative for internal combustion engines owing to its clean burning properties. The success of gaseous-fueled engines lies in the development and use of specially formulated and well researched lubricating oils as these oils are the only source of carbon emissions in hydrogen-fueled engines. The lubricant oil consumption can be determined in a hydrogen-fueled engine by measuring the carbonaceous emissions. This study determined lubricant oil …

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Evaluation Of Machine Vision Techniques For Use Within Flight Control Systems, Marco Mammarella Dec 2008

Evaluation Of Machine Vision Techniques For Use Within Flight Control Systems, Marco Mammarella

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this thesis, two of the main technical limitations for a massive deployment of Unmanned Aerial Vehicle (UAV) have been considered.;The Aerial Refueling problem is analyzed in the first section. A solution based on the integration of 'conventional' GPS/INS and Machine Vision sensor is proposed with the purpose of measuring the relative distance between a refueling tanker and UAV. In this effort, comparisons between Point Matching (PM) algorithms and Pose Estimation (PE) algorithms have been developed in order to improve the performance of the Machine Vision sensor. A method of integration based on Extended Kalman Filter (EKF) between GPS/INS and …

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Promoting Self-Directed Learning In Adult Piano Instruction, Rhonda Jane Mizok-Taylor Dec 2008

Promoting Self-Directed Learning In Adult Piano Instruction, Rhonda Jane Mizok-Taylor

Graduate Theses, Dissertations, and Problem Reports (ETD)

More and more adults are studying music. Because of this, the number of adult method books has been increasing; however, when writing an adult method book, it is important for the author to remember that adults are more capable of independent learning by using their own previous musical experiences to understand new material. They may not wish to be completely dependent on a teacher for every aspect of instruction.;Using questions derived from Malcolm Knowles' book Self-Directed Learning and questions used by Hung-Ling Chen in the dissertation "An Investigation of Self-Directed Learning among Non-Music Major Adult Piano Learners in One-to-One Piano …

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Jewish Museums - A Multi-Cultural Destination Sharing Jewish Art And Traditions With A Diverse Audience, Jennifer B. Markovitz Dec 2008

Jewish Museums - A Multi-Cultural Destination Sharing Jewish Art And Traditions With A Diverse Audience, Jennifer B. Markovitz

Seton Hall University Dissertations and Theses (ETDs)

As American society becomes more diverse, issues of ethnic self· consciousness are increasingly prevalent. This can be witnessed by the national expansion and development of ethnic museums. At least twenty-five museums representing different ethnicities are located in New York City alone. These museums reach out to their own constituency as a celebration of heritage and culture. In an effort to educate others and foster a greater understanding and appreciation of their culture, they also reach out to a diverse multi-cultural audience. Following suit, Jewish museums attract a diverse audience representing a variety of religions and ethnicities. Jewish Museums - A …

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Neural Network Output Feedback Control Of A Quadrotor Uav, Jagannathan Sarangapani, Travis Alan Dierks Dec 2008

Neural Network Output Feedback Control Of A Quadrotor Uav, Jagannathan Sarangapani, Travis Alan Dierks

Electrical and Computer Engineering Faculty Research & Creative Works

A neural network (NN) based output feedback controller for a quadrotor unmanned aerial vehicle (UAV) is proposed. The NNs are utilized in the observer and for generating virtual and actual control inputs, respectively, where the NNs learn the nonlinear dynamics of the UAV online including uncertain nonlinear terms like aerodynamic friction and blade flapping. It is shown using Lyapunov theory that the position, orientation, and velocity tracking errors, the virtual control and observer estimation errors, and the NN weight estimation errors for each NN are all semi-globally uniformly ultimately bounded (SGUUB) in the presence of bounded disturbances and NN functional …

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Speech Enhancement Using Wavelet Transform, Manal Hade Dec 2008

Speech Enhancement Using Wavelet Transform, Manal Hade

Iraqi Journal of Computers, Communications, Control and Systems Engineering

Speech enhancement is an important proceeding which it can be achieved by estimate the clean speech from noisy speech. The clean speech is corrupted by white Gaussian noise . In this paper, thresholding the wavelet coefficients, that can be done by standard deviation method for each frame by level dependent thresholding using semi soft threshold and soft threshold .The results in this work indicate that using wavelet transform in speech enhancement application provides a good quality (measured in object SNR test) as well as provides other advantages which make it more suitable for some application s such as a split …

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Speaker Identification Using Radial Basis Function Neural Network, Ahmed K. Dec 2008

Speaker Identification Using Radial Basis Function Neural Network, Ahmed K.

Iraqi Journal of Computers, Communications, Control and Systems Engineering

The main objective of this paper is to apply radial basis function neural networks (RBFNN) and evaluated its performance by comparing the results with other methods. In this paper two feature vectors are used separately to address speaker identification problem. The features are linear predictive code (LPC) and Mel-frequency cepstral coefficient (MFCC).The radial basis function neural network (RBFNN) approach is used for matching purpose.This work proposes can be summarized into three steps. The first step is to frame and windowing the input speech signal using hamming window. The second step is to extract the reference and test speech signal using …

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Window-Updated Method For Strapdown Inertial Navigation Systems Based On Neuro-Fuzzy Inference System, Ahmed Mudher Dec 2008

Window-Updated Method For Strapdown Inertial Navigation Systems Based On Neuro-Fuzzy Inference System, Ahmed Mudher

Iraqi Journal of Computers, Communications, Control and Systems Engineering

The last two decades have shown in increasing trend in the use of nanigation technologies such as Strapdown Inertial Systems (SDINS) in several applications including land vehicles and automated car navigation. On the other hand it can cause large position errors over short time, due to the low quality of the Inertial Measurement Unit (IMU). These errors determine the performance and the navigation accuracy of the INSs. Although the huge efforts to improve SDINSin terms of its mechanization equations,it could not cover the remaining drawbacks of SDINS; such as the impact of INS short term errors ,model dependency ,prior knowledge …

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Design Of A Pic Based Dual Sensing Motion Detector, Areej Alaa, Abeer Fadhil Shamal Dec 2008

Design Of A Pic Based Dual Sensing Motion Detector, Areej Alaa, Abeer Fadhil Shamal

Iraqi Journal of Computers, Communications, Control and Systems Engineering

Motion detectors are widely implemented in the design of intruder alarm systems. While these detectors in their raw state can have high detection sensitivity, this comes at the expense of generating higher false alarm rates. The most popular motion detection techniques implement either Passive infrared motion sensors or Active Continuous Wave Microwave Doppler motion sensors. Motion detectors using Dual Detectors employing both Doppler Microwave (MW) and Passive Infrared (PIR) motion sensors provide a new performance level where the feature of both sensors are combined while avoiding the disadvantages of both. The sensors are combined through a microprocessor to provide” intelligent …

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Speech Compression Using Discrete Wavelet Transform With Optimum Differential Pulse Code Modulation (Dpcm), Fadel S. Dec 2008

Speech Compression Using Discrete Wavelet Transform With Optimum Differential Pulse Code Modulation (Dpcm), Fadel S.

Iraqi Journal of Computers, Communications, Control and Systems Engineering

In this paper the performance of speech compression system using discrete wavelet transform (DWT) is investigated .Two methods are used for this purpose ;in the first only discrete wavelet transform is used .In the second method linear predictive coding (LPC) in wavelet transform is used . Both methods are used differential pulse code modulation (DPCM) for quantization with optimum selection of quantization parameters using L1oyd algorithm. Huffman code is used for both methods to increase the compression ratio without effect on the quality performance of speech signal. The results show that DPCM with DWT gives the best performance than when …

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