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Arc-Discharge In Solution: A Novel Synthesis Method For Carbon Nanotubes And In Situ Decoration Of Carbon Nanotubes With Nanoparticles, Debasis Bera Jan 2005

Arc-Discharge In Solution: A Novel Synthesis Method For Carbon Nanotubes And In Situ Decoration Of Carbon Nanotubes With Nanoparticles, Debasis Bera

Electronic Theses and Dissertations

Nanotechnology has reached the status of the 21st century's leading science and technology based on fundamental and applied research during the last two decades. An important feature of nanotechnology is to bridge the crucial dimensional gap between the atomic and molecular fundamental sciences and microstructural scale of engineering. Accordingly, it is very important to have an in-depth understanding of the synthesis of nanomaterials for the use of state-of-the-art high technological devices with enhanced properties. Recently, the 'bottom-up' approach for the fabrication of nanomaterials has received a great deal of attention for its simplicity and cost effectiveness. Tailoring the various parameters …

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Transmission Electron Microscopy Studies In Shape Memory Alloys, Madhavi Tiyyagura Jan 2005

Transmission Electron Microscopy Studies In Shape Memory Alloys, Madhavi Tiyyagura

Electronic Theses and Dissertations

In NiTi, a reversible thermoelastic martensitic transformation can be induced by temperature or stress between a cubic (B2) austenite phase and a monoclinic (B19') martensite phase. Ni-rich binary compositions are cubic at room temperature (requiring stress or cooling to transform to the monoclinic phase), while Ti-rich binary compositions are monoclinic at room temperature (requiring heating to transform to the cubic phase). The stress induced transformation results in the superelastic effect, while the thermally induced transformation is associated with strain recovery that results in the shape memory effect. Ternary elemental additions such as Fe can additionally introduce an intermediate rhombohedral (R) …

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The Effect Of Free Chlorine And Chloramines On Lead Release In A Distribution System, Ferdinand Vasquez Jan 2005

The Effect Of Free Chlorine And Chloramines On Lead Release In A Distribution System, Ferdinand Vasquez

Electronic Theses and Dissertations

Total lead release in drinking water in the presence of free chlorine and chloramine residuals was investigated in field, laboratory and fundamental investigations for finished waters produced from ground (GW), surface (SW), saline (RO) and blended (B) sources. Field investigations found more total lead was released in the presence of chloramines than in the presence of free chlorine for RO and blended finished waters; however, there were no statistical differences in total lead release to finished GW and SW. Laboratory measurements of finished waters oxidation-reduction potential (ORP) were equivalent by source and were not affected by the addition of more …

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Numerical Modeling Of Dissimilatory Iron Reduction In Sediments At A Field Site, Chun-Wen Chen Jan 2005

Numerical Modeling Of Dissimilatory Iron Reduction In Sediments At A Field Site, Chun-Wen Chen

Electronic Theses and Dissertations

The primary purpose of this study is to identify the 'universal' rate formulations with scaled-dependent parameters for the biological reduction of hematite. Three possible rate formulations were proposed to describe the bioreduction rate of hematite, and two kinds of simulation were conducted to validate the formulations and parameters with both batch and column experimental data: a reaction-based biogeochemical (batch) modeling with BIOGEOCHEM 1.0 and a reactive biogeochemical transport (column) modeling via HYDROGEOCHEM 4.0. Based on the results of simulations, only the dual Monod kinetic with inhibition rate formulation with respect to the concentrations of lactate, ßFeOOH, and Fe2+ under certain …

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Mechanisms Of Nanofilter Fouling And Treatment Alternatives For Surface Water Supplies, Charles Robert Reiss Jan 2005

Mechanisms Of Nanofilter Fouling And Treatment Alternatives For Surface Water Supplies, Charles Robert Reiss

Electronic Theses and Dissertations

This dissertation addresses the role of individual fouling mechanisms on productivity decline and solute mass transport in nanofiltration (NF) of surface waters. Fouling mechanisms as well as solute mass transport mechanisms and capabilities must be understood if NF of surface waters is to be successful. Nanofiltration of surface waters was evaluated at pilot-scale in conjunction with advanced pretreatment processes selected for minimization of nanofilter fouling, which constituted several integrated membrane systems (IMSs). Membrane fouling mechanisms of concern were precipitation, adsorption, particle plugging, and attached biological growth. Fouling was addressed by addition of acid and antiscalent for control of precipitation, addition …

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An Interactive Distributed Simulation Framework With Application To Wireless Networks And Intrusion Detection, Oleg Kachirski Jan 2005

An Interactive Distributed Simulation Framework With Application To Wireless Networks And Intrusion Detection, Oleg Kachirski

Electronic Theses and Dissertations

In this dissertation, we describe the portable, open-source distributed simulation framework (WINDS) targeting simulations of wireless network infrastructures that we have developed. We present the simulation framework which uses modular architecture and apply the framework to studies of mobility pattern effects, routing and intrusion detection mechanisms in simulations of large-scale wireless ad hoc, infrastructure, and totally mobile networks. The distributed simulations within the framework execute seamlessly and transparently to the user on a symmetric multiprocessor cluster computer or a network of computers with no modifications to the code or user objects. A visual graphical interface precisely depicts simulation object states …

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Interconnection, Interface And Instrumentation For Micromachined Chemical Sensors, Naveenkumar Srinivasaiah Palsandram Jan 2005

Interconnection, Interface And Instrumentation For Micromachined Chemical Sensors, Naveenkumar Srinivasaiah Palsandram

Electronic Theses and Dissertations

In realizing a portable chemical analysis system, adequate partitioning of a reusable component and a disposable is required. For successful implementation of micromachined sensors in an instrument, reliable methods for interconnection and interface are in great demand between these two major parts. This thesis work investigates interconnection methods of micromachined chip devices, a hybrid fluidic interface system, and measurement circuitry for completing instrumentation. The interconnection method based on micromachining and injection molding techniques was developed and an interconnecting microfluidic package was designed, fabricated and tested. Alternatively, a plug-in type design for a large amount of sample flow was designed and …

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Evaluation Of Proprietary Stormwater Treatment Devices In Field And Laboratory Conditions, Saheeda Marie Romah Jan 2005

Evaluation Of Proprietary Stormwater Treatment Devices In Field And Laboratory Conditions, Saheeda Marie Romah

Electronic Theses and Dissertations

Proper stormwater management acknowledges both water quantity and water quality. Historically, stormwater quantity and quality have been separately considered; runoff was routed as quickly as possible into the nearest body of water. Although this alleviates potential flooding concerns, water quality is often compromised. Common stormwater quality problems include gross pollutants, sediment, nutrients, and heavy metals. The chronic elevated presence of these pollutants is detrimental to the environment. As a result, the government has passed legislature to protect waterways. The passage of the National Pollution Discharge Elimination System (NPDES) permit requires that municipalities implement stormwater treatment techniques, known as Best Management …

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Analyzing The Community Structure Of Web-Like Networks: Models And Algorithms, Aurel Cami Jan 2005

Analyzing The Community Structure Of Web-Like Networks: Models And Algorithms, Aurel Cami

Electronic Theses and Dissertations

This dissertation investigates the community structure of web-like networks (i.e., large, random, real-life networks such as the World Wide Web and the Internet). Recently, it has been shown that many such networks have a locally dense and globally sparse structure with certain small, dense subgraphs occurring much more frequently than they do in the classical Erdös-Rényi random graphs. This peculiarity--which is commonly referred to as community structure--has been observed in seemingly unrelated networks such as the Web, email networks, citation networks, biological networks, etc. The pervasiveness of this phenomenon has led many researchers to believe that such cohesive groups of …

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Part I : Isolation Of Dipentyl 2-(4-(Pentan-3-Yl) Phenyl) Malonate From Sanguisorba Officinalis Labill Part Ii: Synthesis Of A Novel Family Of Ethers Of Podocarpic Acid, Manjeera Yalavarty Jan 2005

Part I : Isolation Of Dipentyl 2-(4-(Pentan-3-Yl) Phenyl) Malonate From Sanguisorba Officinalis Labill Part Ii: Synthesis Of A Novel Family Of Ethers Of Podocarpic Acid, Manjeera Yalavarty

Electronic Theses and Dissertations

The goal of part I of this thesis was to isolate pure anti cancer compounds from the Russian plant Sanguisorba officinalis. This plant was selected for investigation because it showed 100% activity against leukemia (L1210 mouse leukemia cells) during the preliminary screening of approximately 100 Russian plant extracts. This work has resulted in the isolation of novel compound 11 using traditional chromatography techniques. Compound 11 was characterized with spectroscopic techniques such as IR, 1H NMR, 13C NMR, DEPT, DQCOSY and MS. Compound 11 was assigned the structure dipentyl 2-(4-(pentan-3-yl) phenyl) malonate. The goal of part II of this thesis was …

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Instrumented Nanoindentation Studies Of Deformation In Shape Memory Alloys, Sudhir Rajagopalan Jan 2005

Instrumented Nanoindentation Studies Of Deformation In Shape Memory Alloys, Sudhir Rajagopalan

Electronic Theses and Dissertations

Near equi-atomic nickel titanium (NiTi) shape memory alloys (SMAs) are a class of materials characterized by their unique deformation behavior. In these alloys, deformation mechanisms such as mechanical twinning and stress induced phase transformation between a high symmetry phase (austenite) and a low symmetry phase (martensite) additionally occur and influence mechanical behavior and thus their functionality. Consequently, applications of SMAs usually call for precise phase transformation temperatures, which depend on the thermomechanical history and the composition of the alloy. Instrumented indentation, inherently a mechanical characterization technique for small sampling volumes, offers a cost effective means of empirically testing SMAs in …

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Contributions To Automatic Particle Identification In Electron Micrographs: Algorithms, Implementation, And Applications, Vivek Singh Jan 2005

Contributions To Automatic Particle Identification In Electron Micrographs: Algorithms, Implementation, And Applications, Vivek Singh

Electronic Theses and Dissertations

Three dimensional reconstruction of large macromolecules like viruses at resolutions below 8 Ã… - 10 Ã… requires a large set of projection images and the particle identification step becomes a bottleneck. Several automatic and semi-automatic particle detection algorithms have been developed along the years. We present a general technique designed to automatically identify the projection images of particles. The method utilizes Markov random field modelling of the projected images and involves a preprocessing of electron micrographs followed by image segmentation and post processing for boxing of the particle projections. Due to the typically extensive computational requirements for extracting hundreds of …

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Vibration Analysis Of Carbon Nanotube Using Continuum Model And Finite Element Model, Hari Subramaniam Jan 2005

Vibration Analysis Of Carbon Nanotube Using Continuum Model And Finite Element Model, Hari Subramaniam

Electronic Theses and Dissertations

The main objective of the thesis is to propose the methods of determining vibration behavior of carbon nanotubes (CNTs) using continuum models and finite element models. Secondary objective is to find the effect of van der Waals force on vibration of multiwalled carbon nanotubes . The study of vibration behavior of CNTs is important because of their potential engineering applications such as nano-mechanical resonators and tips of scanning probe instruments where they are subjected to mechanical vibrations. Continuum modeling is based on an elastic beam model. The interlayer van der Waals interactions are represented by Lennard-Jones potential. In finite element …

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The Effect Of Timber Harvesting On Soil Biogeochemical And Physical Properties : Resilience Studies On Disturbed Forests And Their Associated Wetlands, Bikash Rajkarnikar Jan 2005

The Effect Of Timber Harvesting On Soil Biogeochemical And Physical Properties : Resilience Studies On Disturbed Forests And Their Associated Wetlands, Bikash Rajkarnikar

Electronic Theses and Dissertations

No abstract provided.

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Variability In Detection Of Fecal Coliforms And Escherichia Coli Through American Public Health Association Standard Methods Of Mfc, Mug And Verification Methods And The Differentiation Of Escherichia Coli Through Substrate Utilization Kinetics, Misty Schaubhut Jan 2005

Variability In Detection Of Fecal Coliforms And Escherichia Coli Through American Public Health Association Standard Methods Of Mfc, Mug And Verification Methods And The Differentiation Of Escherichia Coli Through Substrate Utilization Kinetics, Misty Schaubhut

Electronic Theses and Dissertations

No abstract provided.

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Deep Play, Sean Ennis Jan 2005

Deep Play, Sean Ennis

Electronic Theses and Dissertations

No abstract provided.

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Cascading Effects Of Predator Removal On The Ecology Of Sea Turtle Nesting Beaches, Brandon Barton Jan 2005

Cascading Effects Of Predator Removal On The Ecology Of Sea Turtle Nesting Beaches, Brandon Barton

Electronic Theses and Dissertations

Traditional views of food web dynamics have characterized species interactions as linear and direct. However, modern food web theory suggests that interactions can also be nonlinear and indirect, so that disturbance at one trophic level is transmitted throughout the community. Many previous studies have demonstrated that the removal of top predators from terrestrial ecosystems can have broad-scale impacts on community ecology. I examined the direct and indirect effects of raccoon removal from sea turtle nesting beaches in east-central Florida during the summers of 2003 and 2004. Raccoon and ghost crab predation are among the highest causes of egg mortality for …

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Assessing The Impact Of University Technology Incubator Practices On Client Performance, Thomas O'Neal Jan 2005

Assessing The Impact Of University Technology Incubator Practices On Client Performance, Thomas O'Neal

Electronic Theses and Dissertations

This research is designed to distinguish and describe or explain incubator practices that affect the performance of incubator clients of university technology incubator programs. The research focuses on understanding which practices significantly contribute to increasing job creation for the firms located in university based technology incubators. An increasing number of communities are embracing economic development strategies that target the high tech sector with high wage, high value jobs as a way to diversify their economies and boost local and regional economies. New economic development strategies include the notion of a creation strategy or "growing your own" instead of relying on …

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Advances In The Opto-Mechanical Design And Alignment Of The Hehsi Imaging Spectrometer Based On A Sagnac Interferometer, Michael Stuart Schreiber Jan 2005

Advances In The Opto-Mechanical Design And Alignment Of The Hehsi Imaging Spectrometer Based On A Sagnac Interferometer, Michael Stuart Schreiber

Electronic Theses and Dissertations

The High Efficiency HyperSpectral Imager (HEHSI) is a Fourier Transform hyperspectral imager based on a Sagnac interferometer. This thesis research concentrates on the design upgrade and calibration of HEHSI from a proof of concept instrument to a prototype field instrument. Stability is enhanced by removing degrees of freedom and alignment is enhanced by providing for in-situ adjustments. The use of off the shelf components allows for reduced development time and cost constraints. HEHSI is capable of multiple configurations to accommodate sensors and optics with specialized capabilities for multiple wavelength ranges and viewing conditions. With a spectral response of 400 to …

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Confocal Laser Scanning Microscopy As A Tool For The Investigation Of Tetracycline Fluorescence In Archaeologicalhuman Bone, Corey Maggiano Jan 2005

Confocal Laser Scanning Microscopy As A Tool For The Investigation Of Tetracycline Fluorescence In Archaeologicalhuman Bone, Corey Maggiano

Electronic Theses and Dissertations

Fluorochromes such as tetracycline have been used to label bone for histomorphometric analysis, measuring bone formation, growth, maintenance, and pathology. More recently, similar fluorescence has been observed in ancient human bone. Attributed to tetracycline (TC) exposure, this phenomenon could affect various aspects of health during life and/or preservation of remains postmortem. Standard epifluorescence microscopy is the most common tool employed in the analysis of these labels. Though valuable, this technique is limited by its inability to penetrate bone three-dimensionally and its inclusion of out-of-focus light, possibly disrupting accurate analysis. Confocal Laser Scanning Microscopy (CLSM) has been demonstrated as a valuable …

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Daughter Of Invention : Storytelling As Identity Negation And Negotion In Julia Alvarez's How The Garcia Girls Lost Their Accents And Yo!, Jordan Craven Jan 2005

Daughter Of Invention : Storytelling As Identity Negation And Negotion In Julia Alvarez's How The Garcia Girls Lost Their Accents And Yo!, Jordan Craven

Electronic Theses and Dissertations

No abstract provided.

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Autonomy In Relation To Utilitarian Ceramics, Jonathan A. Barnes Jan 2005

Autonomy In Relation To Utilitarian Ceramics, Jonathan A. Barnes

Electronic Theses and Dissertations

No abstract provided.

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Art, Aesthetics, And Ecology : Creating A High School Curriculum, Ashley Elizabeth Kalemjian Jan 2005

Art, Aesthetics, And Ecology : Creating A High School Curriculum, Ashley Elizabeth Kalemjian

Electronic Theses and Dissertations

No abstract provided.

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A Novel Binding Interaction For The Paxillin Ld3 Motif: Paxillin Ld3 Mediates Merlin-Paxillin Binding At Paxillin Binding Domain 1, Sandra E. Beattie Geden Jan 2005

A Novel Binding Interaction For The Paxillin Ld3 Motif: Paxillin Ld3 Mediates Merlin-Paxillin Binding At Paxillin Binding Domain 1, Sandra E. Beattie Geden

Electronic Theses and Dissertations

Neurofibromatosis type 2, an autosomal dominant genetic disorder, causes predisposed individuals to develop various benign central and peripheral nervous system tumors. The characteristic tumors of this disease are schwannomas, which are tumors of the Schwann cells, typically on the vestibular nerve. These and the other associated tumors slowly compress nervous system structures causing deafness and loss of balance, resulting in an average life-span of less than 40 years. The product of the Nf2 gene is the protein named merlin or schwannomin. In individuals diagnosed with NF2, merlin is either absent or mutated to the point of inactivation. As such, merlin …

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The Influence Of Past Abuse On Heterosexual Cohabiting Couples' Relationship Types, Page Thanasiu Jan 2005

The Influence Of Past Abuse On Heterosexual Cohabiting Couples' Relationship Types, Page Thanasiu

Electronic Theses and Dissertations

This study investigated the influence of past witnessed or experienced abuse on heterosexual cohabiting couples' Premarital Personal and Relationship Evaluation for Cohabiting Couples (PREPARE-CC) couple relationship types. The researcher utilized preexisting data from 5,000 cohabiting couples who had previously participated in the PREPARE marriage preparation program and had completed the PREPARE-CC inventory including a demographic section that elicited information about past abuse. Discriminant analysis was conducted in SPSS to answer the question of whether the presence of past witnessed or experienced abuse could successfully predict relationship type among cohabiting couples. Results of the discriminant analysis yielded no significant ability to …

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Simulation Studies Of Self-Assembly And Phase Diagram Of Amphiphilic Molecules, Geuorgui Kostadinov Bourov Jan 2005

Simulation Studies Of Self-Assembly And Phase Diagram Of Amphiphilic Molecules, Geuorgui Kostadinov Bourov

Electronic Theses and Dissertations

The aim of this dissertation is to investigate self-assembled structures and the phase diagram of amphiphilic molecules of diverse geometric shapes using a number of different computer simulation methods. The semi-realistic coarse-grained model, used extensively for simulation of polymers and surfactant molecules, is adopted in an off-lattice approach to study how the geometric structure of amphiphiles affects the aggregation properties. The results of simulations show that the model system behavior is consistent with theoretical predictions, experiments and lattice simulation models. We demonstrate that by modifying the geometry of the molecules, self-assembled aggregates are altered in a way close to theoretical …

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Regional Readiness For Intelligence Information Sharing To Support Homeland Security, Christine Genet Kemp Jan 2005

Regional Readiness For Intelligence Information Sharing To Support Homeland Security, Christine Genet Kemp

Electronic Theses and Dissertations

The Markle Task Force on National Security in the Information Age was created to produce recommendations on how to best leverage intelligence and information to improve security without compromising existing civil liberties. Their second report proposed that the government set up an information-sharing network using currently available technology to improve our ability to prevent terrorist attacks, while protecting civil liberties. The Markle recommendations have been incorporated into the recent Intelligence Reform and Terrorism Prevention Act of 2004. The proposition is that the Markle task force recommendations are sufficient to achieve the required data integration in the United States. To affirm …

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An Inquiry Into Discourse Choices As Indicators Of Gender Attitudes In A Non-Profit Conservative Christian Business, Dawn Marie Kruger Jan 2005

An Inquiry Into Discourse Choices As Indicators Of Gender Attitudes In A Non-Profit Conservative Christian Business, Dawn Marie Kruger

Electronic Theses and Dissertations

This paper is an inquiry into the discourse styles of men and women who work together in a conservative Protestant Christian business. Many conservative Protestant Christian churches teach that the Bible forbids women from holding positions of authority over men. Yet in the communications department of this particular business, women fill the top three management positions, supervising a mixed-gender staff of 15. Research has shown that men and women subconsciously use language markers that indicate personal attitudes toward the same and the opposite genders. This research project draws on that information while it analyzes the oral and electronic discourse of …

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Affective Design In Technical Communication, Michael Alan Rosen Jan 2005

Affective Design In Technical Communication, Michael Alan Rosen

Electronic Theses and Dissertations

Traditional human-computer interaction (HCI) is based on 'cold' models of user cognition; that is, models of users as purely rational beings based on the information processing metaphor; however, an emerging perspective suggests that for the field of HCI to mature, its practitioners must adopt models of users that consider broader human needs and capabilities. Affective design is an umbrella term for research and practice being conducted in diverse domains, all with the common thread of integrating emotional aspects of use into the creation of information products. This thesis provides a review of the current state of the art in affective …

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The Effects Of A Project-Based Mathematics Curriculum On Middle School Students' Intended Career Paths Related To Science, Technology, Engineering And Mathematics, Barbara Clanton Jan 2005

The Effects Of A Project-Based Mathematics Curriculum On Middle School Students' Intended Career Paths Related To Science, Technology, Engineering And Mathematics, Barbara Clanton

Electronic Theses and Dissertations

This study is an examination of whether a project-based mathematics curriculum would influence students' intended career paths related to science, technology, engineering, and mathematics (STEM) endeavors; perceived usefulness of mathematics; and perceived competence in doing mathematics. A review of the literature revealed that there are many shortages of professionals in STEM fields. United States women and men are not pursuing STEM endeavors in great numbers and the U.S. relies heavily on international students to fill this gap. The literature revealed that the girls who do not pursue STEM endeavors in great numbers do not perceive mathematics as a useful endeavor …

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