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Suppressing Delta-I Noise In Mcml Circuits In Mixed Signal Environment, Ritesh Jayant Mehta Dec 2007

Suppressing Delta-I Noise In Mcml Circuits In Mixed Signal Environment, Ritesh Jayant Mehta

Electrical Engineering Theses - Archive

This work addresses the problem of simultaneous switching noise (SSN) in mixed signal environment. It is shown that the Metal Oxide Semiconductor Current Mode Logic (MCML) can be used to minimize the SSN. In short channel devices, Drain Induced Barrier Lowering (DIBL) effect causes the current mismatch problem. It is seen that this current mismatch problem aggravates SSN. Basic logic gates were designed using MCML topology at 5 Gbps. Parasitic model was introduced at power supply lines and substrate to study the behaviour of these logic gates in the presence of parasitics. Interpolation type delay cells were used to suppress …

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African American Grandmother Caregivers: Relationships Among Information Need, Perceived Burden, Perceived Health, And Service Need And Use, Gloria F. Carr Dec 2007

African American Grandmother Caregivers: Relationships Among Information Need, Perceived Burden, Perceived Health, And Service Need And Use, Gloria F. Carr

Nursing Dissertations - Archive

African American (AA) grandmothers who parent their grandchildren may experience burden related to these responsibilities. Little is known about perceived caregiver burden and its influence on AA grandmother health and service needs. The purpose of this descriptive, correlational research study was to investigate relationships among personal characteristics, information need, perceived burden, perceived health, service need, and service use in AA grandmothers who are the primary caregivers for one or more of their biological grandchildren. Recruited through churches and community centers, 93 AA grandmothers, ages 36 to 78, participated in this study. These grandmothers were primary caregivers for 211 grandchildren. The …

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Stochastic Models For In-Silico Event-Based Biological Network Simulation, Preetam Ghosh Dec 2007

Stochastic Models For In-Silico Event-Based Biological Network Simulation, Preetam Ghosh

Computer Science and Engineering Dissertations - Archive

The multi-scale biological system model is a new research direction to capture the dynamic measurements of complex biological systems. The current statistical thermodynamic models can not scale to this challenge due to the explosion of state-spaces of the system, where a biological organ may have billions of cells, each with millions of molecule types and each type may have a few million molecules. We seek to propose a phenomenological theory that will require a smaller number of state variables to address this multi-scaling problem. Discrete Markov statistical process is used to understand the system dynamics in the networking community for …

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Stress Distribution And Strength Prediction Of Composite Laminates With Multiple Holes, Brian Esp Dec 2007

Stress Distribution And Strength Prediction Of Composite Laminates With Multiple Holes, Brian Esp

Mechanical and Aerospace Engineering Dissertations - Archive

The major purpose of this study was to investigate failure of composite laminates with multiple unloaded holes in close proximity. The least square boundary collocation method for anisotropic materials was utilized to determine the state of stress. The approach utilized collocation on both the internal and external boundaries, making it relatively easy to implement. The method compared favorably to both published and finite element solutions. A failure prediction approach for an infinite, symmetric and balanced laminate, with two holes in close proximity was presented. The baseline material for consideration was IM7/977-3, a carbon fiber/epoxy lamina. The failure prediction method was …

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An Analytical And Numerical Model For Design Of Non- Uniformly Powered Silicon Chips Based On Both Thermal And Device Clock Performance, Abhihit D. Kaisare Dec 2007

An Analytical And Numerical Model For Design Of Non- Uniformly Powered Silicon Chips Based On Both Thermal And Device Clock Performance, Abhihit D. Kaisare

Mechanical and Aerospace Engineering Dissertations - Archive

Silicon chips continue to grow in capabilities, complexity and performance. Silicon chips typically integrate functional components such as logic and level two (L2) cache memory in their architecture. This functional integration of logic and memory results in improved performance of the chip. However, the integration also introduces a layer of complexity in the thermal design and management of silicon chips. As a direct result of functional integration, the power map on a silicon chip is typically highly non-uniform and the assumption of a uniform heat flux across the chip surface has been shown to be invalid post Pentium II architecture. …

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Thermal Stresses Of Composite Beams With Rectangular And Tubular Cross-Sections, Chia-Wei Su Dec 2007

Thermal Stresses Of Composite Beams With Rectangular And Tubular Cross-Sections, Chia-Wei Su

Mechanical and Aerospace Engineering Theses - Archive

Closed-form analytical solutions for laminated composite beams with tubular and rectangular cross-sections are developed for evaluating the thermal induced stresses. The derivations are based on modified lamination theory and parallel axis theorem. The present approach includes variation of ply stiffness along the contour of the cross-section. The interlaminar shear stress of cantilever composite beam with rectangular cross-section under a transverse load is analytically proved to be independent of temperature change in uniform temperature environment. Three-dimensional finite element models for computing thermal stresses of both cross-sections are developed using commercial software package ANSYS 10. The results obtained from analytical solutions give …

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Cellular Targets Involved In Reovirus-Induced Oncolysis Of Ras-Transformed Cells, Jung Hwa Chung Dec 2007

Cellular Targets Involved In Reovirus-Induced Oncolysis Of Ras-Transformed Cells, Jung Hwa Chung

Biology Theses - Archive

Reovirus is a ubiquitous virus with demonstrated oncolytic properties. In this study, we investigate the pathways which reovirus produces a lytic infection in SV-40 transformed WI-38 cells and the noncytocidal infection of normal WI-38 cells using microarray technology. The analysis revealed that reovirus infection induced changes in 178 genes, of which 112 genes were up regulated and 66 genes down regulated. Of the 112 up regulated genes, 13 of the WI-38 2RA genes were shown to be involved in apoptosis or inhibition of cellular DNA synthesis. Of the 66 genes down regulated, seven of the WI-38 genes displayed effects involved …

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Rcd-1 Related:A Positively Selected Retrogene With Spermatogenesis Function In Drosophila, Taniya Muliyil Dec 2007

Rcd-1 Related:A Positively Selected Retrogene With Spermatogenesis Function In Drosophila, Taniya Muliyil

Biology Theses - Archive

Gene duplication is one of the major forces in driving genome evolution. Our study focuses on a particular retrogene Rcd-1 related (Rcd-1r) that originated through retroposition of the parental gene Required for cell differentiation 1 (Rcd-1) about 5-13 million years ago. Rcd-1r is present in D. melanogaster, D. simulans, D. sechellia and D. mauritiana whereas the parental gene is present in all the Drosophila species. Rcd-1r is inserted in the 3' UTR of the gene CG13102 and it is encoded in the complementary strand. Previous studies by Castrillion et al. showed that a P element inserted in the 5' UTR …

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Ral Interacting Protein (Ralbp1): Linking Glutathione Conjugate Transport To Oxidative Stress Defenses And Signaling Pathways, Dilki Wickramarachchi Dec 2007

Ral Interacting Protein (Ralbp1): Linking Glutathione Conjugate Transport To Oxidative Stress Defenses And Signaling Pathways, Dilki Wickramarachchi

Chemistry & Biochemistry Dissertations - Archive

The glutathione-conjugate transporter protein DNP-SG ATPase was demonstrated to be identical to the independently cloned Ral-effector, Ralbp1. Glutathione-conjugate transport is linked to substrate-stimulated ATPase activity, while GTPase stimulating activity (GAP-activity), and clathrin-coated pit-binding activity was demonstrated for this protein by different groups of investigators. The relationship between these activities and physiological functions of Ralbp1 were not clear. The present studies were designed to address the hypothesis that the ability of Ralbp1 to couple the hydrolysis of ATP with the movement of substances, i.e. its transport activity, is the crucial element that allows Ralbp1 to function as a stress-defense protein. Results …

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Studies Towards Bioactive Imidazoles, Karuna Koda Dec 2007

Studies Towards Bioactive Imidazoles, Karuna Koda

Chemistry & Biochemistry Theses - Archive

The work presented in this thesis focuses on the development of an enantioselective and practical route form the total synthesis of villagorgin via haplosleridamine imidazole alkaloid containing β- carboline moiety by employing the well-known Pictet-Spengler and Fischer indole reactions. We approached two different ways inorder to synthesize these molecules Our first approach focused on using a Dieckmann condensation, requiring the preparation of the corresponding diester. Initial attempts to prepare this substrate directly from histidine were unsuccessful, however after conversion to the N-benzzylamine and reductive amination with ester provided the key diester compound. Unfortunately, attempts to effect the Dieckmann reaction were …

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Supramolecular Chemistry On Carbon Dioxide, Hexiang Zhang Dec 2007

Supramolecular Chemistry On Carbon Dioxide, Hexiang Zhang

Chemistry & Biochemistry Theses - Archive

This dissertation describes approaches towards designs, syntheses, characterizations, and applications of supramolecular chemistry on carbon dioxide. Chapter 1 briefly overviews the field of supramolecular chemistry and highlights its horizons, also introduces the progress of sensing devices on chemical warfare agents. Chapter 2 introduces a modular approach to detect chemical warfare agent: phosgene by Fluorescence Resonance Energy Transfer (FRET). It combines the chemical reactivity between amines and phosgene with fluorescence properties of coumarin fluorophores, forms a fast, selective and reliable sensing system. Chapter 3 overviews the chemistry between amines and carbon dioxide and introduces the applications of this reaction in molecular …

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Reluctant Restorationist: Thomas Campbell's Trial And Its Role In His Legacy, Charles Franklin Brazell Dec 2007

Reluctant Restorationist: Thomas Campbell's Trial And Its Role In His Legacy, Charles Franklin Brazell

History Dissertations - Archive

In 1809, Thomas Campbell, with his son Alexander, founded an American religious movement that proposed the union of all Christians based upon the restoration of the New Testament church. The merging of this movement in 1832 with that of Barton W. Stone resulted in the formation of the Stone-Campbell Movement - a movement whose ideas for Christian unity were expressed by Thomas Campbell in his Declaration and Address, and which had the fundamental objective of achieving Christian unity based upon the teachings of the New Testament. Today, the Stone-Campbell Movement consists of three major American Protestant religious groups. The Christian …

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They Don't Sing Like They Used To : Negro Soldier's Resistance To Jim Crow In 1898, Earl Ray Levingston Dec 2007

They Don't Sing Like They Used To : Negro Soldier's Resistance To Jim Crow In 1898, Earl Ray Levingston

History Theses - Archive

By the turn of the twentieth century, Negro troops began to resist Jim Crow laws in an organized way. While some historians have mentioned these racially motivated disturbances, many have failed to seriously analyze and assess these clashes, which has led to the neglect of an important source of African-American resistance to racial discrimination in the post Reconstruction era. The purpose of this thesis is to address that failure. By briefly examining the evolution of Jim Crow policies at the turn of the century, by demonstrating how blacks struggled to serve in the U. S. army from 1673- 1868, by …

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"Does Your Throat Hurt More In The Morning Or Throughout The Day?" "Yes.": Intercultural Medical Discourse, Sarah Elizabeth May Dec 2007

"Does Your Throat Hurt More In The Morning Or Throughout The Day?" "Yes.": Intercultural Medical Discourse, Sarah Elizabeth May

Linguistics & TESOL Dissertations - Archive

An increasing number of immigrants to the United States do not use English as their first, or even second, language. Members of the medical community who treats such patients often do not speak the range of home languages of their patients. As a result of the absence of a common language, many patients are forced to communicate the best they can with their physicians in English. This study focuses the interactions of non-native English speaking patients with their doctors when interpreters were unavailable. Interactions between health care providers and non-native English speaking patients at a university health clinic were videotaped …

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Surface Patterning Of Biodegradable Polymer In Tissue Engineering By Applying Photolithography, Lee-Chun Su Dec 2007

Surface Patterning Of Biodegradable Polymer In Tissue Engineering By Applying Photolithography, Lee-Chun Su

Material Science and Engineering Theses - Archive

The prevalence of cardiovascular disease and inherent problems with current surgical therapies has prompted major efforts in the field of vascular tissue engineering. While there have been significant advances towards creating functional blood vessel substitutes, the fabrication of a vascular graft with mechanical, structural and functional properties similar to native vessels has not yet been achieved. We have presented an observation of a new biodegradable polymer utilized on the research of tissue engineering. Our idea was to create a structure to imitate blood vessel muscles in vitro and also to guide the cells when they start spreading and trying to …

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Thermally Activated Sulfurization Scheme For Cuins2 Solar Cells, Karan Agrawal Dec 2007

Thermally Activated Sulfurization Scheme For Cuins2 Solar Cells, Karan Agrawal

Material Science and Engineering Theses - Archive

Chalcopyrite Solar Cells are now being fabricated on flexible (polymer) substrates. However, CuInS2 solar cells have not been fabricated on the polymer substrates on the commercial scale due the sulfurization temperature which limits the use of polymer substrates during fabrication. To overcome this problem a thermally activated sulfurization process for the manufacture of CuInS2 solar cells from the Cu-In bilayers is described in this work. This sulfurization process can be employed for lower temperature for the formation of the absorber layer. For the sulfurization, the Cu-In bilayer with different compositions is prepared by thermal evaporation in which the In-rich film …

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Uniform Weighted Compact / Non-Compact Schemes For Shock / Boundary Layer Interaction, Peng Xie Dec 2007

Uniform Weighted Compact / Non-Compact Schemes For Shock / Boundary Layer Interaction, Peng Xie

Mathematics Dissertations - Archive

The critical problem of CFD is perhaps an accurate approximation of derivatives for a given discrete data set. Based on our previous work on the weighted compact scheme (WCS), a uniform weighted compact / non-compact scheme (UWCNC) has been developed. Similar to WENO, three high order candidates, left, right, and central, are constructed by using Hermite polynomials. According to the smoothness, three weights are derived and assigned to each candidate. The weights will lead the scheme to be upwind-biased when approaching the shock or other discontinuities but quickly becomes central, compact, and of high order just off the shock. Therefore, …

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Today's Army: An Examination Of The Differences Of Newspaper Coverage About America's Army In Small And Large Markets, Kimberly Levine Hanson Dec 2007

Today's Army: An Examination Of The Differences Of Newspaper Coverage About America's Army In Small And Large Markets, Kimberly Levine Hanson

Communication Theses - Archive

This study examines differences in coverage of prominent Army news stories in a daily newspaper in a rural town near an Army post and the nearest metropolitan area. Past media and visual effects research suggests that newspaper coverage sets the agenda not only for its readers, but for other mass media, as well. As the American population moves in and around metropolitan regions and further away from any major Army presence, newspaper coverage may become essential in informing the general public about the Army that serves them. A content analysis over a two-month timeframe of the Killeen Daily Herald and …

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Ductile Lightweight Concrete For Lightweight Structural Application, Ake Piyamaikongdech Dec 2007

Ductile Lightweight Concrete For Lightweight Structural Application, Ake Piyamaikongdech

Civil Engineering Theses - Archive

This study developed a ductile concrete for precast wall systems which are capable of resisting high wind in excess of 500 mph. The developed concrete mix design consists of sand, cement, glass fiber, and a foaming agent to produce lightweight concrete in the range of 87 pcf (1392 kg/m3) to 90 pcf (1440 kg/m3). A comprehensive testing program for evaluation of the developed concrete material was undertaken. The mix designs were prepared both in the laboratory and in the mix truck with drum capacity of 27 ft3 (0.77 m3), and 177.6 ft3 (5 m3), respectively. The large concrete batches using …

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Learning Video Preferences Using Visual Features And Closed Captions, Darin Brezeale Dec 2007

Learning Video Preferences Using Visual Features And Closed Captions, Darin Brezeale

Computer Science and Engineering Dissertations - Archive

Viewers of video now have more choices than ever. As the number of choices increases, the task of searching through these choices to locate video of interest is becoming more difficult. Current methods for learning a viewer's preferences in order to automate the search process rely either on video having content descriptions or on having been rated by other viewers identified as being similar. However, much video exists that does not meet these requirements. To address this need, we use hidden Markov models to learn the preferences of a viewer by combining visual features and closed captions. We validate our …

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Formulation Of Lean Six Sigma Critical Business Processes For Manufacturing Facilitites, Chaucey Chandler Dec 2007

Formulation Of Lean Six Sigma Critical Business Processes For Manufacturing Facilitites, Chaucey Chandler

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

The author desired to create a method organizing the concepts from Lean, Six Sigma, critical business processes, and simplifying the usage of these concepts to identify Lean Six Sigma Critical Business Processes. Inspired by Laura Meade (1997) and the author's passion concerning process improvements, this research was created. Lean activities eliminate waste, Six Sigma activities eliminate variation, critical business processes focus on those areas that need improvement and are critical to the process, and Analytical Network Process (ANP) models problems considering the interactions between levels. There is value for all companies to implement at least one of these tools. Since …

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Associations And Predictors Of Depressive Symptoms And Smoking Among Adolescents In United States, Bonnie Choi Mo Dec 2007

Associations And Predictors Of Depressive Symptoms And Smoking Among Adolescents In United States, Bonnie Choi Mo

Social Work Theses - Archive

Studies done on the association of smoking and depression found inconclusive results in the direction of the association. The present study utilized public data from the Add Health to examine the associations between depressive symptoms and smoking concurrently and prospectively in adolescents, predictors of current smoking, and associations between concurrent depressive levels and smoking cessation status. The results indicate depressive symptoms promote concurrent and prospective smoking behavior. Higher levels of depressive symptoms at Wave I was characteristic of participants who smoked in the past and smoked regular. Higher depressive symptoms in Wave II were indicative of smoking initiation and regular …

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The Effect Of Social Capital In Women's Participation In The Labor Force In Mexico: A Neighborhood In Monterrey, Maria Luisa Martinez Sanchez Dec 2007

The Effect Of Social Capital In Women's Participation In The Labor Force In Mexico: A Neighborhood In Monterrey, Maria Luisa Martinez Sanchez

Social Work Dissertations - Archive

The purpose of this dissertation study was to explore associations between Women's Participation in the Labor Force (WPLF), family organization (type of family, family size, domestic work and decision-making), personal attributes (years of schooling and labor experience), and social capital, an original approach of this study to understand WPLF. Social capital theoretical approach has been tested mainly in developed countries, in this study a qualitative component to explore cultural factors has been added. In the quantitative component, the study is a cross-sectional, with survey of 190 women (103 working women, 87 non-working women) between the ages of 18 and 64 …

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Assessment Of Social Support And Peer Influence As Factors Contributing To High School Completion Among African American Males, Kristen Shanutelle Guillory Dec 2007

Assessment Of Social Support And Peer Influence As Factors Contributing To High School Completion Among African American Males, Kristen Shanutelle Guillory

Social Work Dissertations - Archive

The study employed a non-experimental survey design to assess social support, spiritual beliefs and peer influence as contributing factors to high school completion among 203 African American males between 18 and 24 years old. A review of empirical and theoretical literature is presented. The participants completed a paper and pencil or online self report survey comprised of demographics, past psychosocial factors, the friends measure of the Texas Christian University/ Prevention Management and Evaluation System scales on family, friends, and self (TCU/PMES), and the Young Adult Social Support Index (YA-SSI). Descriptives revealed that students residing in "run down" communities and attending …

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Localization In Noisy Environment Using Extended Kalman Filter, Aneeket Suresh Patkar Dec 2007

Localization In Noisy Environment Using Extended Kalman Filter, Aneeket Suresh Patkar

Electrical Engineering Theses - Archive

Localization is an important aspect of Wireless Sensor Networks. Information regarding the position of the sensor nodes is not always known. Without the position information of the sensors, the data reported by the sensors is of little use. Various approaches have been used to perform localization using some information about the sensor node. Potential field approach for localization, using distance information has been successfully tested with satisfactory results. However in case of noisy environment, the range measurements have greater inaccuracy. In such cases, localization using the above algorithm can provide some inaccuracy. To rectify such erroneous localization situations, Extended Kalman …

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Decoupling Of Hamiltonian System With Applications To Linear Quadratic Problem, Vishal Gupta Dec 2007

Decoupling Of Hamiltonian System With Applications To Linear Quadratic Problem, Vishal Gupta

Electrical Engineering Theses - Archive

This thesis provides a method of decoupling the Hamiltonian system with application to linear quadratic problem in control system. Resulting decoupled Hamiltonian system helps in formulating easy closed form solution to various optimal control problems. These closed form solution are improvement over the problem of solving first order nonlinear differential equations in conventional methods. Decoupling also eliminates the constraint, "Q = 0 " for certain type of optimal control.

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Are Some Children Weight Blind? The Stigma Of Obesity And Its Influence On 3rd-6th Grade Children, Madeline Rex-Lear Dec 2007

Are Some Children Weight Blind? The Stigma Of Obesity And Its Influence On 3rd-6th Grade Children, Madeline Rex-Lear

Psychology Theses - Archive

The aim of this research was to examine when the buffering effects (if any) of ethnicity, sex, age difference, and personality affect the stigmatization of overweight children, and to determine if some children can indeed be weight-blind. A total of 315 3rd- 6th grade children (boys = 157) completed an online computer survey measuring their perceptions of thin, medium and heavy children of different ethnicities and sex. Children also provided measures of their personality and attitudes toward weight. Finally, height and weight were collected for each child. Results revealed an overwhelming weight bias, which was only weakened by higher levels …

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The Commercial Sexual Exploitation Of Children, Cynthia Hipolito Dec 2007

The Commercial Sexual Exploitation Of Children, Cynthia Hipolito

Criminology & Criminal Justice Theses - Archive

The purpose of the study is to review the thematic content analysis of the empirical literature on the commercial sexual exploitation of children. The research explores recurring themes and/ or trends in the literature by inductive content analysis. The research involves the examination of the research, that is, published books, book chapters, magazine articles, newspaper articles, and refereed journal articles on the topic of commercialized sexual exploitation of children. This very basic form of content analysis will seek to amplify issues on the topic in an organized fashion, by exploring the themes to emerge inductively and make policy recommendations. This …

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Kiowa Changes: The Impact Of Transatlantic Influences, Paul James Moore Dec 2007

Kiowa Changes: The Impact Of Transatlantic Influences, Paul James Moore

History Dissertations - Archive

This study uses a transatlantic interpretive framework, addressing both Euro-American and Kiowa voices to understand Kiowa reactions to changes caused by ongoing transatlantic influences. From their Paleolithic days, the Kiowas faced the challenge of new ways. On the North American continent, they evolved into small hunter-gathering family units as vast grasslands arose from their fire-drives that increasingly reshaped their surroundings. The transatlantic Columbian Exchange, following Spanish discovery, provoked massive changes to Kiowa material culture as the horse produced a cultural revolution to their social and economic practices. Those changes required continued raiding for horses between 1830 and 1874 that exacerbated …

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Multi-Objective Evaluation Of Dynamic Facility Layout Using Ant Colony Optimization, Gary Yu-Hsin Chen Dec 2007

Multi-Objective Evaluation Of Dynamic Facility Layout Using Ant Colony Optimization, Gary Yu-Hsin Chen

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

The Dynamic Facility Layout Problem (DFLP) deals with changes of facility layout throughout time. As an extension to Static Facility Layout Problem (SFLP), it has gathered increasing interests lately. Facility layouts are constantly modified over time either to meet customers' changing demands in product designs and functionalities or to keep pace with technological innovations. Manufacturers must stay flexible and agile and frequent facility layout changes are needed. Since there is often insufficient time and insufficient funding to build a new manufacturing plant, it is often necessary to rearrange the current plant layout. Even though the rearrangement of plant layout can …

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