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Detecting Clinical Biomarkers Using Diffusion Tensor Imaging, Tejasvi Gundapuneedi Jan 2012

Detecting Clinical Biomarkers Using Diffusion Tensor Imaging, Tejasvi Gundapuneedi

Bioengineering Theses - Archive

Diffusion tensor imaging (DTI), a modality of MRI that measures water diffusion properties noninvasively, is highly sensitive to subtle structural changes of white matter. It provides a unique and noninvasive method for delineating in-vivo architecture of human brain white matter. Four metrics derived from DTI, fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AxD) and radial diffusivity (RD), have been widely used to quantitatively characterize the white matter disruption in mental disorders and degenerative diseases. An atlas-based approach incorporating a digital white matter atlas and registration and skeletonization functions of tract-based spatial statistics (TBSS) has been developed recently. This approach …

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Electrospun Biodegradable Polymeric Membranes For Post-Surgery Anti-Adhesion Applications, Pouriska Kivanany Jan 2012

Electrospun Biodegradable Polymeric Membranes For Post-Surgery Anti-Adhesion Applications, Pouriska Kivanany

Bioengineering Theses - Archive

Abdominal adhesion is a prevalent, troublesome condition occurring after surgical procedures and can cause a variety of side effects such as, abdominal pain with a highly associated cost ($1.3 billion annually for) for expensive surgical removal. Many companies and research groups have studied and developed techniques to prevent adhesion after surgery; however, none have been completely effective or practical for use. Current materials have many drawbacks, such as the inability to degrade, poor surgical handling, and attracting bacteria. Up to 93% of patients receiving abdominal surgeries will develop abdominal adhesions, and a viable treatment option needs to be developed to …

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Involvement Of Mixed Lineage Leukemia And Homeobox Proteins In Dna Damage Recognition And Repair, Somdutta Chakraborty Jan 2012

Involvement Of Mixed Lineage Leukemia And Homeobox Proteins In Dna Damage Recognition And Repair, Somdutta Chakraborty

Bioengineering Theses - Archive

Deoxyribonucleic Acid (DNA) molecules are informational molecules, encoding genetic information which is indispensable in the development and functioning of living organisms. DNA encodes for most proteins essential for all bodily functions and a few of which are known to be involved in the DNA Damage Response/ Repair mechanism. DNA damage recognition and repair is crucial and the cell has an innate mechanism of repairing it. Unrepaired DNA damage leads to genetic mutation or even cancers, which are sustained by further cell division and genetic multiplication. Other researchers have already confirmed the involvement of several proteins and histones like PARP and …

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Evaluation Of Tissue Response From The Regenerative Multielectrode Array (Remi) Implant Using Atf-3 And Cjun, Sarita Bhetawal Jan 2012

Evaluation Of Tissue Response From The Regenerative Multielectrode Array (Remi) Implant Using Atf-3 And Cjun, Sarita Bhetawal

Bioengineering Theses - Archive

Currently available peripheral nerve regenerative interfaces such as the sieve and the micro-channel regenerative electrode, intended to be used for the control and natural feel from advanced robotic prosthetic devices, eventually fail due to nerve damage due to axonopathy. The Regenerative Multi-electrode array (REMI) developed in our lab overcomes this limitation by providing a non-obstructive pathway for regenerating axons. However, it is possible that the mismatch at the electrode-tissue interface may cause axonal injury during limb stretching. In order to determine if micro-motion at the REMI causes neuronal injury I evaluated the nuclear expression of Activating Transcription Factor 3 (ATF-3), …

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Surface Modification Of Magnetic Nanoparticles For Formulation Of Photoluminescent Polymer-Coated Magnetic Nanoparticles To Detect And Treat Cancers, Tejaswi Dhanpal Kadapure Jan 2012

Surface Modification Of Magnetic Nanoparticles For Formulation Of Photoluminescent Polymer-Coated Magnetic Nanoparticles To Detect And Treat Cancers, Tejaswi Dhanpal Kadapure

Bioengineering Theses - Archive

Cancer has been one of the leading causes of death worldwide that necessitates the development of theranostic systems for effective cancer management. Previously, we developed biodegradable-photoluminescent polymer coated magnetic nanoparticles (BPLP-MNPs) as a theranostic system for cancer management. These BPLP-MNPs were highly stable with excellent biocompatibility and consisted of magnetic targeting and imaging capabilities. However, these particles experienced reduced fluorescence due to the presence of dark/blackness of MNPs, which absorbs excited/emitted light. Therefore, it was hypothesized that surface modification on MNPs can overcome this limitation and enhance fluorescence for BPLP-MNPs.The goal of this research was therefore to employ various surface …

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Fundamental Understanding Of Soot Induced Wear Mechanism Of Diesel Engines, Mihir Patel Dec 2011

Fundamental Understanding Of Soot Induced Wear Mechanism Of Diesel Engines, Mihir Patel

Material Science and Engineering Dissertations - Archive

Emission of Oxides of nitrogen and particulates matters from diesel engines have been reduced by implementing exhaust gas recirculation (EGR) protocols but at the expense of increased wear of engine components. This problem is aggravated by Environment Protection Agency (EPA) regulation such as API CJ 4 and SAPS where chemical limits have been places on the amount of phosphorous, sulfur and sulfated ash in lubrication oil. Several studies have examined the role played by diesel soot on enhanced wear but none have provided comprehensive mechanism. This would allow the possibility to comprehend fundamental understanding of soot induced wear mechanism of …

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Templated Synthesis And Characterizations Of High Moment Magnetic Nanoparticles For Bioapplications, Punnapob Punnakitikashem Dec 2011

Templated Synthesis And Characterizations Of High Moment Magnetic Nanoparticles For Bioapplications, Punnapob Punnakitikashem

Material Science and Engineering Dissertations - Archive

Magnetic nanoparticles have been widely used for biomedical applications such as drug and gene delivery, hyperthermia treatment of cancer, MRI contrast enhancement, cell labeling and magnetic separation. We present two new types of magnetic nanoparticles for bioapplications; granular superparamagnetic gold nanoparticles and multilayered nanodisks. Granular superparamagnetic gold nanoparticles consist of superparamagnetic islands embedded in a gold matrix. Multilayered nanodisks consist of two magnetic layers separated by a non-magnetic layer with two capping layers. Capping layers such as gold provide functionalization sites for biomolecule attachment. These nanoparticles possess two key magnetic requirements for bioapplications, a high saturation magnetic moment and a …

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An Innovative Epitaxial Growth Method For Minimizing Dislocations In Thin-Film Quantum-Dot Optoelectronic And Photovoltaic Device Applications, Jateen Gandhi Dec 2011

An Innovative Epitaxial Growth Method For Minimizing Dislocations In Thin-Film Quantum-Dot Optoelectronic And Photovoltaic Device Applications, Jateen Gandhi

Material Science and Engineering Dissertations - Archive

A new buffer layer method for epitaxial growth of lattice-mismatched semiconductor quantum-dots based p-i-n structures is presented. To our knowledge this is the first instance of a dislocation-reduction approach that has shown reduced dark current behavior in a quantumdot device compared to its counterpart homojunction p-n device consisted of the barrier material. The present work compared a lattice misfit strain build-up behavior between an In0.15Ga0.85As (p) / InAs (i) / In0.15Ga0.85As (n) (QD) device to an In0.15Ga0.85As (p) / In0.15Ga0.85As (n) (HOM) device, as both were grown on an un-doped gallium arsenide (GaAs) (100) substrate. The intrinsic region of QD …

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Electrochemical N-Type Doping In Metal Oxides And Its Application In Photovoltaics, Xiaofei Han Dec 2011

Electrochemical N-Type Doping In Metal Oxides And Its Application In Photovoltaics, Xiaofei Han

Material Science and Engineering Dissertations - Archive

Electrodeposition has the advantages of low-cost, high-throughput and large-area processing which is particularly suitable for solar cells fabrication. Two common metal oxides prepared by electrodeposition are discussed here, ZnO and Cu2O. ZnO is largely used in the solar cells as the window and transparent contact material. Cu2O is potential absorption material for next generation solar cell. n-type doping of these metal oxides was revealed during electrochemical deposition. For naturally n-type ZnO, n-type doping is achieved by substituting the cation (Zn) with a group III element (Al, Ga and Y) and for naturally p-type Cu2O, n-type doping is realized by substituting …

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A Century Of Chemistry Instruction At The College In Arlington: 1895-1995 (A Memoir And Scrapbook), Thomas James Cogdell Dec 2011

A Century Of Chemistry Instruction At The College In Arlington: 1895-1995 (A Memoir And Scrapbook), Thomas James Cogdell

Chemistry & Biochemistry Faculty Publications - Archive

No abstract provided.

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Full Issue, The Mcnair Team Dec 2011

Full Issue, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

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Friends Of The Library Mcnair Scholarship Awards, The Mcnair Team Dec 2011

Friends Of The Library Mcnair Scholarship Awards, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

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Harvesting Seismic Energy For Emergent Use After Major Earthquakes, Crystal Jamaica Dec 2011

Harvesting Seismic Energy For Emergent Use After Major Earthquakes, Crystal Jamaica

McNair Scholars Research Journal

No abstract provided.

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Experimental Investigation Of Spring-In Behavior Of Composite Materials, John Black Dec 2011

Experimental Investigation Of Spring-In Behavior Of Composite Materials, John Black

McNair Scholars Research Journal

No abstract provided.

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Acknowledgements, The Mcnair Team Dec 2011

Acknowledgements, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

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Mentor Profile, The Mcnair Team Dec 2011

Mentor Profile, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

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Informal Screencasting: Results Of A Customer-Satisfaction Survey With A Convenience Sample, Jody Bailey Sep 2011

Informal Screencasting: Results Of A Customer-Satisfaction Survey With A Convenience Sample, Jody Bailey

UTA Libraries Staff Publications - Archive

Purpose: Informal screencasting (i.e., capturing your actions on a computer screen with the goal of showing others how to accomplish tasks on a website or in a given software environment) is defined and described. Customer-satisfaction survey results from 103 faculty, staff, and students are presented. Design/methodology/approach: An online survey revealing customer satisfaction with informal screencasts was made available in spring 2010 to faculty, staff, and students of a mid-sized public university in Arlington, Texas, USA. Results are compiled, analyzed, and presented here. Findings: Most participants' reactions to the librarian's informal screencasts were positive or quite positive, but many participants still …

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American Literary Scholarship: An Annual 2009, Gary Scharnhorst, William Rossi, Andrew M. Smith, Elizabeth J. Wright, Christopher Sten, William Pannapacker, Tyler Hoffman, Michael J. Kiskis, Sarah B. Daugherty, Carol J. Singley, Robert Thacker, Alec Marsh, Matthew Hofer, Theresa M. Towner, Joseph Furscione, William J. Scheick, Jim Egan, Michael L. Burduck, Nicolas S. Witschi, Sanford E. Marovitz, Catherine Calloway, Jerome Klinkowitz, Barry Ahearn, Frank J. Kearful, Dorothy Chansky, Jonathan Chambers, Gary Lee Stonum, Françoise Clary, Markus Heide, Daniela Ciani Forza, Jenny Bonnevier, Thomas Ærvold Bjerre, Lene Johannessen, Jopi Nyman, Antonio C. Márquez Sep 2011

American Literary Scholarship: An Annual 2009, Gary Scharnhorst, William Rossi, Andrew M. Smith, Elizabeth J. Wright, Christopher Sten, William Pannapacker, Tyler Hoffman, Michael J. Kiskis, Sarah B. Daugherty, Carol J. Singley, Robert Thacker, Alec Marsh, Matthew Hofer, Theresa M. Towner, Joseph Furscione, William J. Scheick, Jim Egan, Michael L. Burduck, Nicolas S. Witschi, Sanford E. Marovitz, Catherine Calloway, Jerome Klinkowitz, Barry Ahearn, Frank J. Kearful, Dorothy Chansky, Jonathan Chambers, Gary Lee Stonum, Françoise Clary, Markus Heide, Daniela Ciani Forza, Jenny Bonnevier, Thomas Ærvold Bjerre, Lene Johannessen, Jopi Nyman, Antonio C. Márquez

Covers, Titles, and Tables: The Formations of American Literary Canons in Anthologies - Archive

Contains Title Page, Table of Contents

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Anaerobic Processes For Waste Treatment And Energy Generation, Melanie L. Sattler Aug 2011

Anaerobic Processes For Waste Treatment And Energy Generation, Melanie L. Sattler

Civil Engineering Faculty Publications - Archive

No abstract provided.

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Evaporation From Soils Under Thermal Boundary Conditions: Experimental And Modeling Investigation To Compare Equilibrium- And Nonequilibrium-Based Approaches, Kathleen M. Smits, Abdullah Cihan, Toshihiro Sakaki, Tissa H. Illangasekare May 2011

Evaporation From Soils Under Thermal Boundary Conditions: Experimental And Modeling Investigation To Compare Equilibrium- And Nonequilibrium-Based Approaches, Kathleen M. Smits, Abdullah Cihan, Toshihiro Sakaki, Tissa H. Illangasekare

Civil Engineering Faculty Publications - Archive

In the shallow subsurface immediately below the land-atmosphere interface, it is widely recognized that the movement of water vapor is closely coupled to thermal processes. However, their mutual interactions are rarely considered in most soil water modeling efforts or in practical applications where it becomes necessary to understand the spatial and temporal distribution of soil moisture. The validation of numerical models that are designed to capture these processes is difficult due to the scarcity of field or laboratory data with accurately known hydraulic and thermal parameters of soils, limiting the testing and refinement of heat and water transfer theories. The …

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Celebration Of Faculty Creative Works 2010, University Of Texas At Arlington Library, Ut Arlington Office Of The Provost Apr 2011

Celebration Of Faculty Creative Works 2010, University Of Texas At Arlington Library, Ut Arlington Office Of The Provost

Faculty Creative Works-Archive

The University of Texas at Arlington Library and the Office of the Provost are pleased to host the third Celebration of Faculty Creative Works, an exhibition that showcases the books, art, music, media, patents, and journal editorial contributions made by the UT Arlington faculty and staff in 2010. And for the first time, we are proud to recognize those faculty members who have received national awards and recognition.

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Extension Of A Progressive Failure, Energy Dissipation, Composite Tailoring Concept To A Healing Configuration, Shailesh Jayant Divey Jan 2011

Extension Of A Progressive Failure, Energy Dissipation, Composite Tailoring Concept To A Healing Configuration, Shailesh Jayant Divey

Material Science and Engineering Theses - Archive

A composite failure tailoring concept that results in a yield type response under tension has been proposed, modeled, and experimentally verified in prior research. The concept capitalizes upon a sequential, progressive failure of a set of redundant load paths of tailored strength and length. It has been shown in prior publications that the concept is functional and by comparison with experimental results that the analytical models of response developed are accurate. The limits of performance of the proposed tailoring concept have recently been investigated via a parametric study using one of the response models developed and significant improvements have been …

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Preliminary Design Of A Pressurization System For Small Bipropellant Rocket Engines, Steven Stanley Jan 2011

Preliminary Design Of A Pressurization System For Small Bipropellant Rocket Engines, Steven Stanley

Mechanical and Aerospace Engineering Dissertations - Archive

A study was conducted on the feasibility of developing a device or system that would improve the performance of small, bipropellant rockets through pressurization of the propellants. Due to the limitations in the space industry, namely high development costs and resistance to change, the new approach needed to be as simple and robust as possible. After reviewing several different potential methodologies, a concept was developed from first principles based on small gas turbine engine fuel injection approaches. The concept is simple and has heritage in the field of gas turbine engines, but it is new for the field of rocket …

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Analysis Of Pulse Detonation Turbojet Engines, Ronnachai Vutthivithayarak Jan 2011

Analysis Of Pulse Detonation Turbojet Engines, Ronnachai Vutthivithayarak

Mechanical and Aerospace Engineering Dissertations - Archive

Research over the last two decades has shown the potential advantages of pulse detonation engines (PDEs) over existing aero-engines in terms of improved thermodynamics efficiency, improved thrust performance, simplicity of design, and exibility to operate over a wide speed range. The inherently unsteady characteristic of PDEs makes it difficulty to analyze and evaluate their performance. The conventional method that relies on steady-state assumptions cannot be directly applied. PDE studies have to employ unsteady gasdynamics behavior. In this study, the thermodynamic cycle of a PDE, which can be called the ZND cycle, is theoretically analyzed. A parametric analysis of turbojet PDEs …

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Mode Truncation Analysis In Forced Response Of Structural Dynamics, Sravan Kumar Neela Jan 2011

Mode Truncation Analysis In Forced Response Of Structural Dynamics, Sravan Kumar Neela

Mechanical and Aerospace Engineering Theses - Archive

Mode truncation in Modal analysis is an important problem and should be addressed with an effective truncation criterion. The truncation errors are considered as error forces and these error limits can be used to select the number of modes in the solution. Usually frequency based approach is used in selection of modes. But this method ignores the error forces in truncation and not effective if the cutoff frequency is greater than highest natural mode. An effective criterion would limit error forces, thereby minimizing errors in the response solution. To overcome the inaccuracies due to truncation, Mode Truncation Augmentation was used …

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Experimental And Numerical Investigation Of Transesterification Of Vegetable Oil With A Continuous Flow Capillary Reactor, Rachaneewan Charoenwat Jan 2011

Experimental And Numerical Investigation Of Transesterification Of Vegetable Oil With A Continuous Flow Capillary Reactor, Rachaneewan Charoenwat

Mechanical and Aerospace Engineering Dissertations - Archive

Biodiesel, Fatty Acid Methyl Ester (FAME), is a renewable fuel that is a promising alternative to fossil fuels in the future. Biodiesel not only has similar properties to diesel derived from fossil fuel, but it also provides more environmentally friendly due to lower carbon monoxide and sulfur emissions. Biodiesel is composed of methyl esters which can be synthesized from various fatty acid sources with a present of catalyst. Typical feed-stocks include vegetable oils, such as waste cooking oil, animal fats, and even oil from algae. Four primary ways to use vegetable oil as a fuel are direct use, blending with …

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Modeling And Control Of Automatic Transmission With Planetary Gears For Shift Quality, Patinya Samanuhut Jan 2011

Modeling And Control Of Automatic Transmission With Planetary Gears For Shift Quality, Patinya Samanuhut

Mechanical and Aerospace Engineering Dissertations - Archive

Automatic transmission is a major component in a vehicle that transmits the power source from the engine to the drive wheels of the vehicle. To improve fuel economy, reduce emission and enhance driving performance, many researchers have made tremendous efforts on new technologies for automatic transmission with planetary gear sets. Among these new technologies, system dynamics and control methodologies are extremely important tools to realizing the fuel economy, emission and driving performance. This research effort focuses on the modeling and control of an automatic transmission with planetary gear sets. A Lagrange-based method is developed to derive the equations of motion …

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Buckling Analysis Of Thin Plates With Or Without A Hole Under Arbitrary Boundary Conditions Using The Galerkin Method, Srider Thirupachoor Comerica Jan 2011

Buckling Analysis Of Thin Plates With Or Without A Hole Under Arbitrary Boundary Conditions Using The Galerkin Method, Srider Thirupachoor Comerica

Mechanical and Aerospace Engineering Theses - Archive

This thesis demonstrates how to find the critical buckling load value of thin plates with or without a hole under different boundary conditions using the Galerkin method. The use of symbolic software is essential due to the lengthy computations involved because of the complexity of the problems. Firstly, the lateral deflection of the plate is expressed in a series of polynomials each of which satisfies the given boundary conditions. Then by using the Galerkin method, the coefficients of these polynomials are found and with the help of symbolic algebra system, the matrices for the corresponding eigenvalue problem are built from …

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Xanes And Ftir Study On Dried And Calcined Bones, Jayapradhi Rajendran Jan 2011

Xanes And Ftir Study On Dried And Calcined Bones, Jayapradhi Rajendran

Material Science and Engineering Theses - Archive

The animal bones are common archeological finds and are helpful in understanding the human past. The bones undergo transformation when they are calcined. The cooked and cremated bones undergo different transformation, because of their difference in their temperatures. Various techniques are employed to characterize the bone. In this study, XANES and FTIR are used to characterize the dried and calcined bones of different species. The calcined bones are prepared at two different temperatures, which helps in understanding the difference between the cooked and cremated bones. The objective of this research is to comprehend the chemical property of the bone material …

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A One Dimensional Dry Friction Microconveyor Platform: Modelling And Analysis Of Micropart Motion Due To Surface Excitation, Moshin Rizwan Jan 2011

A One Dimensional Dry Friction Microconveyor Platform: Modelling And Analysis Of Micropart Motion Due To Surface Excitation, Moshin Rizwan

Mechanical and Aerospace Engineering Dissertations - Archive

Many approaches are used for micropart manipulation ranging from individual pick and place to manipulation through a workcell comprising of arrays of actuators. Existing approaches provide discrete actuation and have limitations on the lower bound on the size of the micropart to be handled. In this research, the active surface concept for non-contact micropart manipulation is investigated. The active surface deformation is generated by a set of controlled microactuators and provides for continuous micromanipulation while alleviating limitations of existing approaches. The drastic increase of surface area to volume ratio from macroscale to microscale requires the consideration of surface forces (such …

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