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High Strength E-Glass/Cnf Fibers Nanocomposite, Esam Abu-Zahra
High Strength E-Glass/Cnf Fibers Nanocomposite, Esam Abu-Zahra
ETD Archive
Glass fibers are among the most versatile industrial materials known today, where 4 billion pounds of glass are used every year. They are readily produced from raw materials, which are available in virtually unlimited supply. To compensate for its low tensile strength, glass is usually mixed with other materials such as nanofibers and nanospheres, to form what is called "glass nanocomposites". Nevertheless, glass composites still suffer from different weaknesses such as: poor dispersion, poor alignment and orientation of reinforcing materials (due to their short lengths relative to the defect sizes in the composite matrices), in addition to the difficulties associated …
Molecular Mechanism Of Incorporation Of Factor Va Into Prothrombinase, Melissa Barhoover
Molecular Mechanism Of Incorporation Of Factor Va Into Prothrombinase, Melissa Barhoover
ETD Archive
The mainstay of the blood coagulation cascade is the formation of the fibrin clot, catalyzed by the serine protease, thrombin. The prothrombinase complex catalyzes the activation of prothrombin to thrombin and, is composed of the enzyme, factor Xa, and the protein cofactor, factor Va, in the presence of divalent metal ions associated on a membrane surface. The enzyme, factor Xa, alone can activate prothrombin by two sequential proteolytic cleavages at Arg271 and Arg320 resulting in the intermediates, Fragment 1.2 and Prethrombin 2. The overall rate of this reaction is not compatible with survival. On the other hand, the incorporation of …
Principals' Transformational Leadership Skills And Their Teachers' Job Satisfaction In Nigeria, Francis O. Ejimofor
Principals' Transformational Leadership Skills And Their Teachers' Job Satisfaction In Nigeria, Francis O. Ejimofor
ETD Archive
This study investigated the relationship between teachers' perceptions of principals' transformational leadership skills and teachers' job satisfaction. It also revealed the relationship between principals' demographic characteristics and their perceptions of their ability to be transformational in their leadership styles. Participants were 518 secondary school teachers and 48 principals from two large Local Government Areas in Southeastern Nigeria. Multiple linear regression was used to analyze data. It was found that principals' transformational leadership skills significantly impacted teachers' job satisfaction. Some demographic variables of teachers were also studied to determine their relationship with job satisfaction. The results revealed that principals who spent …
Academic Optimism In High Schools, Margaret Duffy-Friedman
Academic Optimism In High Schools, Margaret Duffy-Friedman
ETD Archive
This study contributes to the research foundation of academic optimism (Hoy, Tarter & Woolfolk Hoy, 2006) through incorporating the following three aims: to determine the relationship between academic emphasis, collective efficacy, faculty trust in students and parents, and academic optimism to explore the relationship of academic optimism with state student achievement and Adequate Yearly Progress (AYP) standards and to identify the practices in schools that demonstrate academic emphasis, faculty trust in students and parents, and collective efficacy that comprise academic optimism. Qualitative and quantitative methods were utilized to collect quantitative survey data and qualitative interview data on academic emphasis, collective …
Role Of Cd36 In Platelet Function, Arunima Ghosh
Role Of Cd36 In Platelet Function, Arunima Ghosh
ETD Archive
CD36 is a scavenger receptor expressed on a wide variety of cells including platelets. It recognizes multiple ligands, yet its function on platelets is incompletely characterized. Endothelial cell-derived microparticles (EMP) have been identified in diseases where platelet activation plays a pivotal role. Because EMP express phosphatidylserine (PS) on their surfaces, a CD36 ligand, we hypothesized that MP may bind to platelets via a PS-CD36 interaction. Human platelets were shown to bind EMP by flow cytometry and fluorescence microscopy. Binding was significantly inhibited by anti-CD36 antibody or using platelets from CD36 null donors. We observed a significant increase in the rate …
An Investigation Of The Relationship Between Dermal Stresses And Foot Ground Stresses In Diabetic Patients, Zaid M. Hasasneh
An Investigation Of The Relationship Between Dermal Stresses And Foot Ground Stresses In Diabetic Patients, Zaid M. Hasasneh
ETD Archive
The number of people diagnosed with diabetes in the U.S. has been showing a large increase. It has more than doubled during the period of 1980 to 2002. Approximately 18 million Americans have diabetes today with more than 5.2 million undiagnosed cases. While diabetes is categorized as an endocrine system disorder, some of its known complications are associated to the science of biomechanics. Foot ulcers are caused by vascular deterioration due to diabetes, but also directly related to the natural mechanical forces and loads applied to the feet. Therefore, studying these forces, their locations, distribution and their stresses may be …
A Case Study Of Disproportionality In Special Education: Inquiry In An Urban School District, Charlotte D. Ivey
A Case Study Of Disproportionality In Special Education: Inquiry In An Urban School District, Charlotte D. Ivey
ETD Archive
This case study examines the problem of disproportionality in special education in an urban school district in Northeast Ohio. Disproportionality occurs when the risk for being identified in a particular disability category is not proportional to the population being considered. The problem of disproportionate representation of racial groups in certain categories of special education is significant because it is only seen in the "judgemental" categories. That is, categories such as ED and SLD, where the determination for eligibility is subjective and based on professional judgement and inference, as opposed to non-judgemental categories such as OHI, blindness, deaf, orthapaedic and TBI, …
Firm Performance As A Function Of Entrepreneurial Orientation And Strategic Planning Practices, James W. Kroeger
Firm Performance As A Function Of Entrepreneurial Orientation And Strategic Planning Practices, James W. Kroeger
ETD Archive
New business creation is essential for our nation's economy and accounts for all net new job creation. However, 56 of small businesses fail within four years of startup. One way to address this issue is to employ an approach combining an entrepreneurial orientation (EO) with key strategic management planning practices for firms seeking to gain a competitive advantage and improve firm performance. Entrepreneurial orientation is the propensity of firms to be innovative, proactive, and be willing to take risks. This research project empirically investigated the relationship among a firm's scanning intensity, locus of planning, planning flexibility and entrepreneurial orientation and …
The Influence Of Scientific Claims On An Emerging Environmental Issue, Beth Ann Schaberg
The Influence Of Scientific Claims On An Emerging Environmental Issue, Beth Ann Schaberg
ETD Archive
The environmental movement relies on scientific claims to justify its calls for protectionist policies. These claims can be followed in the scientific literature using bibliometric methods such as citation analysis. Citation analysis was used to deconstruct the literature of endocrine disrupting chemical (EDC) sciences as it emerged and developed time from 1980 through 2004. This study explored how the attributes of scientific papers such as topic, journal, experimental model, document type, and support or negation of hypotheses impacted their influence (quantified as times cited) within the field over time. To accomplish this, unique bibliographic data were acquired for each attribute …
Temporal Activation Of The Jak-Stat Pathway In Relation To Cardiac Gene Expression In A Mouse Model Of Cardiac Dysfunction, Cassandra Talerico
Temporal Activation Of The Jak-Stat Pathway In Relation To Cardiac Gene Expression In A Mouse Model Of Cardiac Dysfunction, Cassandra Talerico
ETD Archive
Background: This project examined JAK-STAT pathway activation in two mouse models of cardiac hypertrophy: autoimmune myocarditis and pressure overload (PO). Methods: Myocarditis was induced with cardiac myosin PO was induced by transverse aortic constriction. STAT1, 3, and 5 binding was assessed by gel shift. STATs, JAKs, SERCA2A, and calsequestrin (CSQ) were quantified. In myocarditis, P-STAT3 localization to cardiac myocyte nuclei was ascertained, and plasma IL-6 and ventricular ANF mRNA were analyzed. Results: In myocarditis, STAT3/3 and STAT1/1 activation, inflammation, increased ventricle weight (P < 0.0001), and ANF mRNA (P = 0.005) occurred on days 14, 21, and 28. In PO, activation appeared on day 7 and persisted to failure. P-STAT3 increased (myocarditis, P < 0.0001 pressure overload, P < 0.05). P-JAK1 increased in myocarditis on days 21 and 28 (P < 0.007). In PO, CSQ and SERCA2A levels did not differ, but in myocarditis CSQ decreased (P = 0.02). In myocarditis, a biphasic elevation in plasma IL-6 occurred (P = 0.003). Conclusions: Although JAK-STAT signaling is activated in both models, it occurs earlier in PO and persists to heart failure, whereas in myocarditis it declines to basal levels as inflammation and plasma IL-6 return to baseline
An Analysis Of National Educational Assessment Policy In The People's Republic Of China And The United States, Guofang Yuan
An Analysis Of National Educational Assessment Policy In The People's Republic Of China And The United States, Guofang Yuan
ETD Archive
Ongoing changes in educational assessment policies within China and the U.S. are complicated. On the one hand, educational assessment policies seem to be diverging, with the U.S. moving towards more standardized testing and China moving away from it. On the other hand, the policies and the reforms seem to converge, with both nations utilizing standardized testing for educational improvement. In China, after the reinstallation of college/university entrance examination in 1977, a series of testing policy reforms and measures were implemented. The goal was to achieve a quality education to best serve China's economic development in a global market. Since 1983, …
Hardware Implementation Of Active Disturbance Rejection Control For Vibrating Beam Gyroscope, David Avanesian
Hardware Implementation Of Active Disturbance Rejection Control For Vibrating Beam Gyroscope, David Avanesian
ETD Archive
Obtaining the approximation of rotation rate form a Z-Axis MEMS gyroscope is a challenging problem. Currently, most commercially available MEMS gyroscopes are operating in an open-loop for purposes of simplicity and cost reduction. However, MEMS gyroscopes are still fairly expensive and are not robust during operation. The purpose of this research was to develop a high-performance and low-cost MEMS gyroscope using analog Active Disturbance Rejection Control (ADRC) system. By designing and implementing analog ADRC both above requirements were satisfied. Analog ADRC provides the fastest response time possible (because the circuit is analog), eliminates both internal and external disturbances, and increases …
Happily Ever After: Fairy Tales And Rescue In Sandra Cisneros's The House On Mango Street, Christina Marie Frank
Happily Ever After: Fairy Tales And Rescue In Sandra Cisneros's The House On Mango Street, Christina Marie Frank
ETD Archive
Within The House on Mango Street, Cisneros weaves several subtle literary allusions, mostly from fairy tales, into many of her vignettes. These subtle allusions help Cisneros create a portrait of expected feminine roles, mostly women as victims, within the patriarchal community, which, when juxtaposed with Esperanza's ideals for herself and her inner strength and drive, help distinguish her as different from those around her. Because she is different and stronger than the other women in her community, Esperanza will be able to reject the other female role models presented by both the women in her community and the women in …
Robust And Decentralized Control Of Web Winding Systems, Wankun Zhou
Robust And Decentralized Control Of Web Winding Systems, Wankun Zhou
ETD Archive
This research addresses the velocity and tension regulation problems in web handling, including those found in the single element of an accumulator and those in the large-scale system settings. A continuous web winding system is a complex large-scale interconnected dynamics system with numerous tension zones to transport the web while processing it. A major challenge in controlling such systems is the unexpected disturbances that propagate through the system and affect both tension and velocity loops along the way. To solve this problem, a unique active disturbance rejection control (ADRC) strategy is proposed. Simulation results show remarkable disturbance rejection capability of …
Characterization Of A Type Ii Metallothionein From Helianthus Annuus Using Recombinant Dna Techniques, Sridhar Bhogavalli
Characterization Of A Type Ii Metallothionein From Helianthus Annuus Using Recombinant Dna Techniques, Sridhar Bhogavalli
ETD Archive
Metallothioneins (MTs) are ubiquitous low molecular weight, cysteine rich proteins with a pronounced affinity for metal ions with d10 configuration such as Cu, Cd and Zn. These heavy metals form metal-thiolate clusters with cysteine side chains. In contrast to the vertebrate forms, knowledge about the properties of members of the plant metallothionein family is still scarce. We describe here a method of isolation and purification of metallothionein from the plant Helianthus annuus, performed by affinity chromatography using glutathione-agarose column. In this study, alignment of gene sequence of the isolated H. annuus metallothionein cDNA with known MTs showed that it belongs …
Stirling Convertor Control For A Lunar Concept Rover, Gina Blaze
Stirling Convertor Control For A Lunar Concept Rover, Gina Blaze
ETD Archive
NASA Glenn Research Center is developing various circuits for a lunar concept rover powered by both a stirling convertor and lithium ion batteries. To begin, a survey of six analog, non-power factor correcting controllers was done for an Advanced Stirling Convertor (ASC) design one was selected to control the stirling convertor. Next, a constant power circuit and lithium ion battery charger was designed, built and tested based on simulation in PSpice. The constant power circuit enables the stirling convertor to maintain a constant power when additional power is required from the batteries
Treatment Of Wastewater Containing Phenol And Heavy Metals Using Natural Zeolite And Bioaugmentation, Patrick Brian Jameson
Treatment Of Wastewater Containing Phenol And Heavy Metals Using Natural Zeolite And Bioaugmentation, Patrick Brian Jameson
ETD Archive
No abstract provided.
Development And Control Of A Solar Array Switching Module, Joseph E. Rymut
Development And Control Of A Solar Array Switching Module, Joseph E. Rymut
ETD Archive
This research focuses on the development and control of a solar array switching module (SASM). The objective of studying this problem was to develop the SASM hardware and design a controller for the SASM which would effectively deal with the wide ranging dynamics of the system and limit oscillations in the steady state. Initially an intuitive controller was designed to control the SASM. Following this an analysis of the SASM was preformed to create a model which described the SASMs operation. Using the system model, an analysis of a PI and a PII controller was completed which found that both …
Mathematical Model Of Ethanol Metabolism In Liver, Parag Pande
Mathematical Model Of Ethanol Metabolism In Liver, Parag Pande
ETD Archive
A lumped mathematical model of liver metabolism is presented to analyze the effect of ethanol on metabolic processes of 24 hr fasted rats. The model is developed in two parts. In the first part individual kinetic models for important regulatory steps in the liver metabolic pathways are developed and in second part transport and mass balance equations in the two well mixed domains: tissue and blood, are developed to calculate intermediate metabolite concentrations and fluxes in response to the changes in ethanol and lactate concentrations in the perfusion medium. Part of the model without ethanol metabolism has been validated and …
The Diversified Online Shopper: Website Feature Preferences And Individual Characteristics, Shohag Dey
The Diversified Online Shopper: Website Feature Preferences And Individual Characteristics, Shohag Dey
ETD Archive
The current study examined the nature of diversified online shoppers with respect to existing differences in their level of website feature preferences, Internet experience (usage and shopping behaviors) and individual demographic characteristics. Using an online survey, 540 individuals residing within United States responded to questions concerning their demographics, extent of Internet usage, online visiting and purchasing behaviors and preference for website features. Individuals were categorized into different user groups- low, medium and high, depending on the extent of their self-reported diversified online shopping across the nine specific product categories. Since shopping referred to both browsing of online information and online …
Development And Modeling Of High Temperature Polymeric Heater, Maziyar Bolourchi
Development And Modeling Of High Temperature Polymeric Heater, Maziyar Bolourchi
ETD Archive
Polymers are generally known for their excellent insulative properties. The addition of carbonaceous fillers such as carbon black and graphite within a polymer matrix can impart electrical and thermal properties making them good conductors. The resulting composites can be used in applications requiring and/or ranging from electromagnetic and radio frequency interference (EMI/RFI) shielding, electrostatic discharge (ESD) and heaters/heating elements to which metals have been the materials of choice. The advantages of using such composites include cost reduction, part consolidation, chemical resistance, lighter weight, and ability to easily design into complex three dimensional shapes via injection molding. For this work, various …
Candida: Shaw's Presentation Of The Roman Catholic "Other", Kenneth Rademaker
Candida: Shaw's Presentation Of The Roman Catholic "Other", Kenneth Rademaker
ETD Archive
In 1876, George Bernard Shaw arrived in London, in many ways just another of the Irish immigrants who were coming to England in the wake of famine. Shaw had not in mind just making a living he wanted to be the literary giant he would indeed become. Of Anglo-Irish descent at a time when little distinction was made between the Anglo and Celtic Irish, Shaw felt it necessary to distinguish himself from the latter sort of immigrants, whose Roman Catholicism was a cause for alarm in a Britain that had been Protestant for three centuries. Shaw would do so with …
Studying The Interaction Of Antifreeze Proteins (Type I And Type Iii) With The Phospholipid Monolayers At Air/Water Interface, Suresh Essampally
Studying The Interaction Of Antifreeze Proteins (Type I And Type Iii) With The Phospholipid Monolayers At Air/Water Interface, Suresh Essampally
ETD Archive
Heart transplantation is a successful therapeutic procedure for the patients with end stage heart disease. Various preservative techniques have been developed to increase the shelf life of organs, but still there can be tissue damage during cold storage. One mechanism leading to damage is disruption of cell plasma membranes as they pass through temperature induced phase transitions. The addition of antifreeze protein (AFP) or glycoprotein (AFGP) to storage solutions has been hypothesized to reduce the leakiness of lipid membranes. From studies using liposomes it has been shown that AFPs can prevent leakage through lipid membranes, although the mechanism of interaction …
Dependent Personality Inventory (Dpi): A Scale To Assess Dependent Personality Subtypes Based On Dsm-Iv-Tr Criteria, Nicole M. Huber
Dependent Personality Inventory (Dpi): A Scale To Assess Dependent Personality Subtypes Based On Dsm-Iv-Tr Criteria, Nicole M. Huber
ETD Archive
This study examined the reliability and validity of a new measure, an inventory designed for the assessment of Dependent Personality traits. The new scale, the Dependent Personality Inventory, uses a dichotomous (True/ False) answer format and produces 8 subscales which correspond with the individual criterion of the disorder as defined by the current Diagnostic and Statistical Manual of Mental Disorders 4th edition (DSM-IV-TR). The scale was administered to a sample of 82 students attending a large mid-western university in the United States. Factor analysis of the DPI using a Principle Components Analysis produced two main factors. Additional analysis showed a …
Performance Characteristics Of An Innovative Wind Power System, David James Kerze
Performance Characteristics Of An Innovative Wind Power System, David James Kerze
ETD Archive
This project entails a study of a wind energy recovery system that utilizes a unique three-dimensional spiral structure to amplify wind speed and direct it toward pluralities of turbines. The system is comprised of an outer spiral shell, internal support structure, turbines, and mechanisms for positioning the turbines to face the prevailing wind. Computational Fluid Dynamics (CFD) analyses were conducted to determine the wind speed amplification factors as a result of a simulated wind flow around the spiral structure. To ensure accuracy of the results, state of the art CFD techniques were applied using Gambit 2.2.30 and Fluent 6.2.16. Specifically, …
Flow Of Sub-Cooled Cryogens Through A Joule-Thomson Device: Investigation Of Metastability Conditions, John M. Jurns
Flow Of Sub-Cooled Cryogens Through A Joule-Thomson Device: Investigation Of Metastability Conditions, John M. Jurns
ETD Archive
Cryogenic fluid systems are fundamental to space flight architecture. Due to the unique properties of cryogenic fluids and the environments in which they operate for space flight, cryogenic fluid management systems must be developed to maintain these fluids at conditions in which they can be utilized. Liquid oxygen boils at 90 K, and liquid hydrogen boils at 20 K. Significant care must be taken to provide a thermal management system that prevents heat entering these fluids with consequential adverse effects on the performance of the cryogenic fluid systems. One critical component of a cryogenic thermal management system is a Joule-Thomson …
The Effect Of Dbs Settings On Neuropsychological Functioning In Patients With Parkinson's Disease, Kathleen M. Mash
The Effect Of Dbs Settings On Neuropsychological Functioning In Patients With Parkinson's Disease, Kathleen M. Mash
ETD Archive
Parkinson's disease (PD) is an idiopathic progressive neurological disorder. Improvement in Parkinsonian motor function has been established with subthalamic nucleus (STN) deep brain stimulation (DBS). Recently, the relationship between DBS stimulator settings and motor function has begun to be explored however, no study to date has investigated the relationship between DBS settings and neuropsychological functioning. This study evaluated the extent to which DBS settings (i.e., amplitude, frequency, and pulse width) are associated with post-operative performances on the RBANS (Repeatable Battery for the Assessment of Neuropsychological Status). The study was a prospective clinical trial of STN DBS for the treatment of …
Effect Of External Counterpulsation (Ecp) On Delayed Onset Muscle Soreness (Doms) In Long Distance Runners, Carly Catanese
Effect Of External Counterpulsation (Ecp) On Delayed Onset Muscle Soreness (Doms) In Long Distance Runners, Carly Catanese
ETD Archive
External counterpulsation (ECP) has previously been used in treating cardiac patients. Compression of the lower extremities during diastole increases venous return and coronary perfusion. Purpose: To determine if ECP affects delayed onset muscle soreness (DOMS) and markers of muscle inflammation and skeletal muscle damage. Methods: Ten trained runners, 5 males and 5 females, aged 30.5 ł 12.8 years ran 20 miles at 70 of their VO2 max on a pre-determined course on two different occasions, once under control conditions and once under ECP treatment conditions. Conditions were randomly assigned to eliminate order effect. Perceived leg pain and blood markers (creatine …
Characterizatin Of A Type Ii Metallothionein From Helianthus Annuus Using Recombinant Dna Techniques, Sridhar Bhogavalli
Characterizatin Of A Type Ii Metallothionein From Helianthus Annuus Using Recombinant Dna Techniques, Sridhar Bhogavalli
ETD Archive
Metallothioneins (MTs) are ubiquitous low molecular weight, cysteine rich proteins with a pronounced affinity for metal ions with d10 configuration such as Cu, Cd and Zn. These heavy metals form metal-thiolate clusters with cysteine side chains. In contrast to the vertebrate forms, knowledge about the properties of members of the plant metallothionein family is still scarce. We describe here a method of isolation and purification of metallothionein from the plant Helianthus annuus, performed by affinity chromatography using glutathione-agarose column. In this study, alignment of gene sequence of the isolated H. annuus metallothionein cDNA with known MTs showed that it belongs …
Byzantine Fault Tolerant Coordination For Web Services Atomic Transactions, Honglei Zhang
Byzantine Fault Tolerant Coordination For Web Services Atomic Transactions, Honglei Zhang
ETD Archive
This thesis describes a Byzantine fault tolerant coordination framework for Web services atomic transactions. In the framework, all core services, including transaction activation, registration, completion, and distributed commit, are replicated and protected by Byzantine fault tolerance mechanisms. The traditional two-phase commit protocol is extended by a Byzantine fault tolerant version that can tolerate arbitrary faults on the coordinator and the initiator sides, and some types of malicious faults on the participant side. To achieve Byzantine fault tolerance in an efficient manner, and to limit the types of malicious behaviors of the coordinator, a novel decision certificate is introduced. The decision …