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On The Study Of Multi-Channel Eeg: Lossless Compression, Signal Modeling And Classification, Yodchanan Wongsawat Dec 2007

On The Study Of Multi-Channel Eeg: Lossless Compression, Signal Modeling And Classification, Yodchanan Wongsawat

Electrical Engineering Dissertations - Archive

Recently, electroencephalogram (EEG) has become necessary for diagnosis, telemedicine, and brain computer interface (BCI). This thesis investigates three signal processing tools which can explore multi-channel structures of the EEG for different applications such as lossless compression, artifact removal, and classification. First, this thesis presents a method for approximating the Karhunen-Loeve transform (KLT) of multi-channel EEG signals. The proposed transform is further parameterized by lifting factorization by which the coefficients' dynamic range is controlled through a proposed pivoting scheme, rendering a reversible structure under quantization of coefficients called IntSKLT. A lossless coder for multi-channel EEG signals which exploits inter-channel correlation among …

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Distributed Predictive Health Monitoring, Jorge David Herrera Gonzalez Dec 2007

Distributed Predictive Health Monitoring, Jorge David Herrera Gonzalez

Computer Science and Engineering Theses - Archive

According to the National Center for Health Statistics the major causes of death in the US are (per year) heart diseases with 654 thousand cases, followed by cancer with 550 thousand cases and stroke with 150 thousand cases. In this project we propose, design, implement and test a prototype of a system that promises to improve the level of detection and prediction of several diseases and improves the quality of life of patients by utilizing non-invasive wireless medical sensors. This system is composed of a set of wireless medical sensors, a nearby (close-proximity) PDA (personal digital accessory) or cell phone …

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Cxlengine - A Comprehensive Xml Loosely Structured Search Engine, Indhu Krishna Sivaramakrishnan Dec 2007

Cxlengine - A Comprehensive Xml Loosely Structured Search Engine, Indhu Krishna Sivaramakrishnan

Computer Science and Engineering Theses - Archive

XML keyword search has been a widely researched area. [15] has proposed an XML semantic search engine called OOXSearch, which answers loosely structured queries. The framework of OOXSearch takes into account the semantic relationship between nodes based on their contexts. The context of a node is determined by its parent node. The label "name", for example, could mean the name of a book and could also mean the name of the book's author. If we try to consider the relationship between these two nodes without considering their parent nodes, we would be drawing the incorrect conclusion that these two nodes …

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Limitations Of Ieee 802.15.4 Based Wireless Mesh Networks For Wireless Localization, William Anthony Wallace Dec 2007

Limitations Of Ieee 802.15.4 Based Wireless Mesh Networks For Wireless Localization, William Anthony Wallace

Computer Science and Engineering Theses - Archive

It is highly desirable to create rapidly and inexpensively deployable mesh networks in certain scenarios. Consider the case of a large storage warehouse; workers are constantly moving in the area and not only do they need to send data periodically but their location needs to be tracked as well. Setting up such network can be accomplished with the IEEE 802.15.4 standard, but a mesh network must be created. There would need to be stationary 802.15.4 nodes that join together to form a backbone infrastructure. This backbone infrastructure (mesh network) would allow the workers, using mobile 802.15.4 nodes, to transmit their …

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Integrated Mems Microsensors, Murali M. Chitteboyina Dec 2007

Integrated Mems Microsensors, Murali M. Chitteboyina

Electrical Engineering Dissertations - Archive

Many Micro-Electro-Mechanical Systems (MEMS) products have been commercialized at a fraction of the cost and size of conventional devices. Low cost, small sizes and multi-function are the ultimate objectives of commodity MEMS devices. An intelligent micro-system requires that the processing circuitry, sensors, and actuators be integrated on the same chip. Integrated MEMS can improve performance of the overall product in several applications. In this work integrated MEMS devices are investigated through semiconducting Yttrium Barium Copper Oxide (YBaCuO) microbolometer arrays on complementary metal oxide semiconductor (CMOS) substrates, a novel tunable infrared microspectrometer, and a novel device-level packaging technique for MEMS resonators. …

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Design And Functionality Analysis Of Operational Amplifiers With Rail-To-Rail Input And Output Capability, Mingsheng Peng Dec 2007

Design And Functionality Analysis Of Operational Amplifiers With Rail-To-Rail Input And Output Capability, Mingsheng Peng

Electrical Engineering Dissertations - Archive

The operational amplifier (op amp) is a fundamental building block in analog integrated circuit design. For low power-supply voltages, the common-mode input voltage and the output voltage of op amps are always required to be able to swing from the negative power-supply rail to the positive power-supply rail, i.e., rail-to-rail. In this dissertation, op amps with rail-to-rail input and output capability are investigated. This dissertation mainly focuses on the rail-to-rail input stage design. Two different rail-to-rail input stages with a single differential pair and a common-mode adapter are presented. The common-mode adapter is used to shift the common-mode input voltage. …

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Subrosa: An Experimental Platform For Studying Timing Analysis Of Real Time Anonymity Systems, Hatim Asger Daginawala Dec 2007

Subrosa: An Experimental Platform For Studying Timing Analysis Of Real Time Anonymity Systems, Hatim Asger Daginawala

Computer Science and Engineering Theses - Archive

Timing analysis poses a significant challenge for the mix based anonymous systems that wish to support low-latency applications like web browsing, instant messaging and Voice over IP (VOIP). Research in this area so far has been done through simulations on ad hoc simulators or non practical local area networks. We developed SubRosa, an experimental platform for studying timing analysis of real time anonymity systems to facilitate the study of Tor like low-latency anonymous systems. We present results of experiments on a real distributed network test bed PlanetLab, where we studied timing analysis attacks and some of the defenses to protect …

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A Potential Field Approach For Distributed Control Of Discrete Actuator And Sensor Arrays, Pritpal S. Dang Dec 2007

A Potential Field Approach For Distributed Control Of Discrete Actuator And Sensor Arrays, Pritpal S. Dang

Electrical Engineering Dissertations - Archive

This dissertation presents new methods of distributed sensing, classification and actuation using potential field and neural network approaches. Human look-a-like robot serves as an excellent tool to implement the strategies developed for sensing, classification and actuation. Achieving dexterity in human-machine interaction or human look-a-like robot helps in better understanding of dynamic and complex environment. This work deals with the issues related to gain autonomy and adaptability through distributed sensing, classification and actuation capabilities. The work presented here starts by mentioning novel strategies employed for morphing a flexible structure to achieve the desired expressions on the artificial skin and then moves …

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Panda Monitoring - A System To Monitor High Performance Computing For The Atlas Experiment-Design, Development,Implementation And Deployment, Prem A. Thilagar Dec 2007

Panda Monitoring - A System To Monitor High Performance Computing For The Atlas Experiment-Design, Development,Implementation And Deployment, Prem A. Thilagar

Computer Science and Engineering Theses - Archive

Grid resources are gaining wide importance in the wake of experiments such as ATLAS aiding in a bigger goal to understand the complexities of nature. The need for a good monitoring system is realized as grid resources are being implemented widely. This work is an analysis of the existing monitoring system of the Panda which is a grid middleware for the ATLAS experiment running in CERN. The thesis aims at identifying the key bottlenecks of the current monitor and speaks about the implementation of a new monitor for the same .The new monitor which is being designed with scalability and …

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Overcoming Triple Oppression: Identity, Power, And Feminism Among Women Of Mexican Ancestry In Texas, 1960-1980, Stephanie Kay Schacherer Dec 2007

Overcoming Triple Oppression: Identity, Power, And Feminism Among Women Of Mexican Ancestry In Texas, 1960-1980, Stephanie Kay Schacherer

History Theses - Archive

The Mexican American civil rights movement surfaced in the 1960s and 1970s as a direct response to blatant institutional discrimination and neglect. The participation of women within the movement, however, has been overwhelmingly marginalized in favor of a largely male-dominated interpretation. Indeed, Mexican American women in Texas displayed a variety of perspectives about religious and ethnic identity, feminism, and politics during this time. Drawing on their own rich heritage and mutual experiences with discrimination based on race, gender, and class, these women nevertheless developed conflicting ideas about the abovementioned topics. How each woman fashioned her own environment according to her …

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Sequences Of Bayes Gaussian Classifier, Jimy Shah Dec 2007

Sequences Of Bayes Gaussian Classifier, Jimy Shah

Electrical Engineering Theses - Archive

A new method for designing sequences of Bayes Gaussian Classifiers is presented in this thesis. First, a basic Bayes Gaussian Classifier is designed with an assumption of data being Gaussian. Then, we have used the Output Weight Optimization-Back Propagation (OWO-BP) technique to iteratively modify the coefficients of the classifier, resulting in less classification error. Through use of an iterative Gram-Schmidt procedure, to train linear functional link nets, input features are ordered from most useful to least useful. Another important development in this thesis is the generation of nested feature subsets. This ensures that the curve for error percentage versus the …

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Embedded System For Monitoring Human Activities Using 3-Axis Accelerometer, Himabindu Yamana Dec 2007

Embedded System For Monitoring Human Activities Using 3-Axis Accelerometer, Himabindu Yamana

Electrical Engineering Theses - Archive

The last decade has witnessed a surge of interest in new sensing and monitoring devices for health care. In several medical and non-medical applications it is necessary to measure the human activities. Detection and monitoring of human activities requires the use of external sensors around the body. The reported design provides a systematic approach for characterization of states. The design employs a 3-axis accelerometer, a microcontroller and RS232 based communication protocol for sensing the activities of a person and the output will be seen on a PC with a graphical user interface. Experiments were conducted on human test subjects and …

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Can A Screening Algorithm For Obstructive Sleep Apnea Be Formulated From Maximal Exercise Test Variables?, Stacy Marie Lueking Dec 2007

Can A Screening Algorithm For Obstructive Sleep Apnea Be Formulated From Maximal Exercise Test Variables?, Stacy Marie Lueking

Kinesiology Theses - Archive

Purpose: The primary purpose of this study was to compare the cardiopulmonary and electrocardiography exercise testing responses of overweight individuals between one group, at low-risk (LR) for developing OSA, versus another group at high-risk (HR) for developing OSA. Methods: Both men (N = 11) and women (N = 11) participated in the study (age 37.00 ± 12.55 yrs., BMI 35.61 ± 6.43). Each subject was assigned to one of two groups, LR (AHI ≤ 5) or HR (AHI > 5) depending upon their overnight AHI score from the ApneaLink® sleep report. In the LR (age 30.45 ± 8.40 yrs., BMI 34.93 …

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The Relationship Among Spirituality, Self-Efficacy, And Quality Of Life In Adults With Sickle Cell Disease, Maxine A. Adegbola Dec 2007

The Relationship Among Spirituality, Self-Efficacy, And Quality Of Life In Adults With Sickle Cell Disease, Maxine A. Adegbola

Nursing Dissertations - Archive

For the individual with sickle cell disease (SCD), the lifespan is increasing but adults report decreased quality of life (QOL), low self-efficacy, and ineffective coping skills. The care of adult patients with SCD requires a complex multidisciplinary team approach with focus not only on physiological, psychological, and social needs, but also on spiritual needs. Quality of life, spirituality, and self-efficacy have been sparsely and separately studied in individuals with SCD. These three constructs have never been combined in one study in the adult SCD population. Objective: The purpose of this study was to explore and describe the relationships among spirituality, …

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Ring Closing Enyne Metathesis Of Imidazole Derivatives And Subsequent Diels-Alder Reaction, E. Vindana Ekanayake Dec 2007

Ring Closing Enyne Metathesis Of Imidazole Derivatives And Subsequent Diels-Alder Reaction, E. Vindana Ekanayake

Chemistry & Biochemistry Theses - Archive

The work presented in this thesis describes the development of new synthetic routes to elaborate simple imidazole derivatives into complex imidazole molecules by the application of different sequential transformations. The first transformation considered is the ring closing enyne metathesis (RCEYM) of imidazoles. To carry out this reaction various allyl and propargyl derivatives of imidazole have been synthesized. These enyne substrates have been varied by changing the positions on the imidazole, as well as changing the protecting groups. All substrates contain trimethysilyl-protected propargyl derivative as the "yne" moiety. After the successful preparation of different enyne substrates, they were subjected to the …

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On Progenitively Koszul Commutative Rings, Paul Russell Stern Dec 2007

On Progenitively Koszul Commutative Rings, Paul Russell Stern

Mathematics Dissertations - Archive

This paper introduces and identifies classes of progenitively Koszul rings. A progenitively Koszul ring is a commutative ring that admits a Koszul complex A=K(R) that is formal, and such that the homology algebra H(A) generated by A is a Koszul algebra. Local complete intersections, which yield exterior algebras (an example of a Koszul algebra) for their homology algebras, serve as a prototype. It is shown that the local complete intersections occupy only a small portion of the class of progenitively Koszul rings. The material in Chapter 1 will cover basic definitions and facts regarding free resolutions differential graded algebras, homology, …

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Multiply Charged Cationic Pairing Agents For Trace Analysis Of Anionic Species By Electrospray Ionization Mass Spectrometry, Jeffrey William Remsburg Dec 2007

Multiply Charged Cationic Pairing Agents For Trace Analysis Of Anionic Species By Electrospray Ionization Mass Spectrometry, Jeffrey William Remsburg

Chemistry & Biochemistry Theses - Archive

Electrospray ionization is one of the most broadly useful and successful approaches for coupling high performance liquid chromatography to mass spectrometry. Most of the research in electrospray ionization mass spectrometry (ESI-MS) has been limited to the positive ion mode, where lower detection limits are generally achieved, due several advantages over the more problematic negative ion mode. However, if one wishes to study anionic species, the negative ion mode traditionally had to be employed, and the problems associated with the negative ion mode had to be tolerated or ameliorated as much as possible Recently, novel work has been done to take …

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A Sticky Situation: Functional Responses Of Mast Cells To Acidic Ph, Nicole Conaway Grose Dec 2007

A Sticky Situation: Functional Responses Of Mast Cells To Acidic Ph, Nicole Conaway Grose

Biology Dissertations - Archive

Precise regulation of extracellular pH is critical for proper function of many cellular activities. Minor fluctuations in pH can have profound effects on ion transport, receptor function, and cellular secretions. This work examines the impact of acidic pH, universal at sites of inflammation, on the activation status of mast cells. The mast cell line HMC-1 was used to explore activation by acidic pH. Activation of HMC-1 cells was characterized in cell adhesion, secretion of cytokines, and changes in cell morphology. HMC-1 adhesion to two substrates, collagen and laminin was measured at 0, 1 hr, 2 hrs, 4 hrs, and 6 …

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Efficacy Of A Series Of Organotin Polymers As Anticancer And Antiviral Drugs, Kimberly Rae Shahi Dec 2007

Efficacy Of A Series Of Organotin Polymers As Anticancer And Antiviral Drugs, Kimberly Rae Shahi

Biology Dissertations - Archive

Anticancer drugs have been shown to have antiviral abilities as well. The two types of diseases are similar in that they hold the cell in a continued growth phase. Therefore, if a drug has anticancer activity, it could have antiviral activity as well. I was interested in drugs that could inhibit DNA replication, since both cancer cells and cells infected with a DNA virus have increased DNA replication. Organotins are known to have anticancer activity and are thought to inhibit DNA replication. In this study, four cancer cell lines (from the NCI 60) and two DNA viruses, HSV-1 and vaccinia, …

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An Examination Of United Methodist Clergy, Jennifer R. Graham Dec 2007

An Examination Of United Methodist Clergy, Jennifer R. Graham

Sociology & Anthropology Theses - Archive

Research on occupational sex segregation and the gender wage gap has consistently shown differences between male and female workers with regards to both position and salary with males segregated in higher positions within companies and accruing higher salaries than females even in similar positions. Two primary explanations have emerged to explain these differences. Supply-side explanations, such as those put forth by economists, assume that the desires of male and female workers are different thus creating women’s disadvantaged work positions. Demand-side explanations, such as those examined in queuing theory, postulate that those in charge of hiring are biased towards male workers …

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A Discrete Event Based Stochastic Simulation Approach For Studying The Dynamics Of Biological Networks, Samik Ghosh Dec 2007

A Discrete Event Based Stochastic Simulation Approach For Studying The Dynamics Of Biological Networks, Samik Ghosh

Computer Science and Engineering Dissertations - Archive

With increasing availability of data resources on the molecular parts of a living cell, biologists are focusing on holistic understanding of cellular mechanisms and the emergent dynamics arising out of their complex interactions. Comprehending the fine-grained signal specificity, gene regulation and feedback mechanisms of molecular interactions at a network level forms a central theme of systems biology. With the speed and sophistication of computational methods, in silico modeling and simulation techniques have become a powerful tool for biologists challenged with understanding the system complexity of biological networks. Numerical simulation of classical chemical kinetics (CCK), agent-based simulations of biological processes, and …

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The Effect Of Temperature On Fiber Composite Bridge Decks, Mahesh Gajula Nagabhushanam Dec 2007

The Effect Of Temperature On Fiber Composite Bridge Decks, Mahesh Gajula Nagabhushanam

Civil Engineering Theses - Archive

The use of Fiber composite honeycomb structure's as bridge decks gained importance, because of its low light weight and ease of installation. In this study, The Fiber composite bridge decks were subjected to thermal gradients. The Fiber composite bridge decks were fabricated in sizes of 2 feet x 8 feet x .5 feet and 4 feet x 8 feet x .5 feet specimens by Kansas structural composites Inc. The program consisted of 3 specimens of size 2 feet x 8 feet x .5 feet with ribs oriented along longitudinal direction, 3 specimens of size 2 feet x 8 feet x …

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Deep Mixing Technology For Mitigation Of Swell-Shrink Behavior Of Expansive Soils Of Moderate To Deep Active Depths, Raja Sekhar Madhyannapu Dec 2007

Deep Mixing Technology For Mitigation Of Swell-Shrink Behavior Of Expansive Soils Of Moderate To Deep Active Depths, Raja Sekhar Madhyannapu

Civil Engineering Dissertations - Archive

Expansive soils are well known for their cyclic shrink-swell behavior due to seasonal related moisture changes. These cyclic movements of expansive soils are due to physico-chemical changes at particle level that are dependent on mineralogical composition of these soils. The subsoil depths susceptible to moisture changes are known as active zones and based on previous studies vary from shallow to deep depths. Movements from these active depths reflect to the surface and cause considerable damages to overlying infrastructures. These damages are slow and time dependent as the in situ moisture fluctuations are slow and continue with time. Since the current …

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Ralbp1 In Stress Resistance, Kenneth Drake Dec 2007

Ralbp1 In Stress Resistance, Kenneth Drake

Chemistry & Biochemistry Dissertations - Archive

Ralbp1 is a multi-specific transporter of glutathione conjugates as well as unconjugated amphiphilic toxins. Because glutathione conjugates are major metabolites of toxic lipid peroxidation products generated as a consequence of oxidant and radiant stress, the hypothesis is put forth that the function of Ralbp1 in-vivo and in vitro should be to protect organisms from chemical stress by removing toxic chemicals. Studies described in this dissertation were designed to prove this hypothesis. We tested the hypothesis by examining whether the inhibition or augmentation of Ralbp1 would sensitize or protect cells and whole animals from the toxic effects of chemicals and radiation. …

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Cross-Layer Design For Wireless Ad Hoc Sensor Networks, Xinsheng Xia Dec 2007

Cross-Layer Design For Wireless Ad Hoc Sensor Networks, Xinsheng Xia

Electrical Engineering Dissertations - Archive

Cross-layer design is an efficient approach to enhance energy efficiency and Quality of Service (QoS) in wireless ad hoc sensor networks. This dissertation will focus on the cross-layer issues and approaches. It will also discuss the latency-aware and energy efficiency tadeoffs and the packets transmission in the rear part of the dissertation. Firstly, we will analyze the cross-layer design for wireless sensor networks based on the virtual MIMO techniques. We will coordinate the physical layer, the MAC layer and the network layer for cross-layer evaluation. Performance analysis and simulation results show that throughput and packet loss ratio will have different …

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Measurement And Modeling Of 1/F Noise In Mosfet Devices With High-Κ Material As The Gate Dielectric, Tanvir Hasan Morshed Dec 2007

Measurement And Modeling Of 1/F Noise In Mosfet Devices With High-Κ Material As The Gate Dielectric, Tanvir Hasan Morshed

Electrical Engineering Dissertations - Archive

A new 1/f noise model has been developed for MOSFET devices with high-? gate stack. To investigate the impacts of nitridation, MOSFETs with nitrided high-? dielectric was used. These devices were provided by Texas Instruments, having four different interfacial layer thicknesses with a stack composition of SiON/HfSiON. The dominant mechanism affecting the noise behavior of these devices was experimentally determined to be correlated number and mobility fluctuation. The impact of remote phonon scattering was investigated in the temperature range of 172K to 300K. It has been observed that the mobility characteristics of these devices were significantly affected by remote phonon …

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Do Green Buildings Influence People's Lifestyle Decisions And Support For Environmental Policy?, Amanda L. Popken Dec 2007

Do Green Buildings Influence People's Lifestyle Decisions And Support For Environmental Policy?, Amanda L. Popken

Public Affairs Theses - Archive

This thesis explores the possibility that experience with green buildings influences peoples' behavior in ways that help bridge the gap between, on one hand, public concern for the natural environment and on the other hand, willingness to adopt sustainable lifestyles and support pro-environmental policies. The study utilizes research on factors that influence behavior to construct a theoretical model in which these factors might be influenced by a person's experience in a green building. The study explores two specific possibilities of behavioral change: people may change their consumption habits to reflect a more sustainable lifestyle; people may change their political behavior …

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Study Of Multiple Impacts Of A Rigid Body With A Flat Surface, Florin Vasile Badiu Dec 2007

Study Of Multiple Impacts Of A Rigid Body With A Flat Surface, Florin Vasile Badiu

Mathematics Dissertations - Archive

Both analytical and numerical results are presented for two rigid body problems: a rod colliding with the ground, and a rigid thin plate colliding with the ground. The study of the succession of impacts of the rod with the ground confirms results from literature, and explores new cases. Numerical simulations can provide results in the study of the clattering impacts of a 3D body colliding with the ground. For a simplification of the analytical calculations, a rectangular plate without thickness is studied. In this case, a comparison between the numerical method, which is a continuous contact method, and the analytical …

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Diffusion-Free Back Contact Solar Cells On S-Passivated Si(100) Substrates, Guanghua Song Dec 2007

Diffusion-Free Back Contact Solar Cells On S-Passivated Si(100) Substrates, Guanghua Song

Material Science and Engineering Dissertations - Archive

A diffusion-free back contact solar cell is proposed in this work. The textured front-side of this cell is coated with ~100 nm thermal SiO2 to enhance the light trapping meanwhile reduce the surface recombination velocity (SRV). The back-side of this cell is finger-patterned, using a diffusion-free junction as its emitter region and Al-Si alloy as its base contact. The diffusion-free junction is made by a Schottky contact between low work-function metal aluminum (Al) and sulfur (S)-passivated p-type Si(100) surface. Solution-based S passivation is one of the experimental realizations of the "valence-mending concept". Previously developed MBE (molecular bean epitaxy) selenium (Se) …

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Localization Of Biliary Tree Structures By Use Of Photon Diffusion Models, Dharmendra Nadkar Dec 2007

Localization Of Biliary Tree Structures By Use Of Photon Diffusion Models, Dharmendra Nadkar

Bioengineering Theses - Archive

A novel computational methodology is proposed for the intraoperative localization of biliary tree structures by means of spectrally resolved near-infrared reflectance measurements. As these structures are embedded in fatty tissue, they cannot be visualized directly, which results in inadvertent injuries during a cholecystectomy operation. Localizing the biliary tree intraoperatively is therefore an important clinical problem. Successful clinical implementation of an imaging system which could attain this goal would reduce surgical time, improve patient safety, and minimize the risk of complications and expenses attributable to the current standard practice of intraoperative cholangiography. It is hoped that the work presented here will …

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