Digital Commons Network^™

Pulsed Inductive Plasma Studies By Spectroscopy And Internal Probe Methods, Warner C. Meeks

Doctoral Dissertations

The broad effort of the Missouri Plasmoid Experiment is to elucidate the energy conversion processes in a pulsed inductive discharge due to the presence of plasma. The test article is a 440 to 490 kHz theta-pinch (or solenoidal) geometry coil with a stored energy of around 80 joules. In this work experimental hydrogen, helium, argon and xenon data at back-fill pressures of 10 to 100 mTorr (1.3 to 133.3 Pa) are obtained and interpreted. Spectral and internal probe studies were performed on MPX Mk.I and Mk.II devices, respectively. IR spectra were acquired in the Mk.I device for argon and xenon. …

Methods And Algorithms For Service Selection And Recommendation (Preference And Aggregation Based), Kenneth Kofi Fletcher

Doctoral Dissertations

"In order for service users to get the best service that meets their requirements, they prefer to personalize their non-functional attributes, such as reliability and price. However, the personalization makes it challenging because service providers have to deal with conflicting non-functional attributes when selecting services for users. In addition, users may sometimes want to explicitly specify their trade-offs among non-functional attributes to make their preferences known to service providers. Typically, users' service search requests with conflicting non-functional attributes may result in a ranked list of services that partially meet their needs. When this happens, it is natural for users to …

Analysis Of Production And Pressure Data To Characterize The Performance Of Oil And Gas Reservoirs, Abuagila Ramadan Elgmati

Doctoral Dissertations

"Production data analysis is an important tool for estimating important reservoir parameters. In particular, determining the average reservoir pressure (p_av) and tracking its change with time is critical to analyzing and optimizing reservoir performance. The traditional method for determining p_av involves pressure buildup tests. A direct method for estimating (p_av) from flowing pressures and rate data is available. However, the method is for an idealized case that assumes constant production rate during pseudo steady-state (PSS) flow, which is not generally true for real wells. This research extends that approach so that it can …

Quantification Of Information Flow In Cyber Physical Systems, Li Feng

Doctoral Dissertations

"In Cyber Physical Systems (CPSs), traditional security mechanisms such as cryptography and access control are not enough to ensure the security of the system since complex interactions between the cyber portion and physical portion happen frequently. In particular, the physical infrastructure is inherently observable; aggregated physical observations can lead to unintended cyber information leakage. Information flow analysis, which aims to control the way information flows among different entities, is better suited for CPSs than the access control security mechanism. However, quantifying information leakage in CPSs can be challenging due to the flow of implicit information between the cyber portion, the …

Localization And Tracking Of Electronic Devices With Their Unintended Emissions, Nurbanu Guzey

Doctoral Dissertations

"The precise localization and tracking of electronic devices via their unintended emissions has a broad range of commercial and security applications. Active stimulation of the receivers of such devices with a known signal generates very low power unintended emissions. This dissertation presents localization and tracking of multiple devices using both simulation and experimental data in the form of five papers.

First the localization of multiple emitting devices through active stimulation under multipath fading with a Smooth MUSIC based scheme in the near field region is presented. Spatial smoothing helps to separate the correlated sources and the multipath fading and results …

Advanced Approaches For Bridge Deck Assessment Using Ground Penetrating Radar, Aleksey Kamilevich Khamzin

Doctoral Dissertations

"Ground penetrating radar (GPR) data were acquired across four bridge decks with the objective of developing an advanced workflow for GPR operation that would allow the bridge owners to estimate repair quantities for certain bridge decks, based on GPR data. The primary contributions from this research are as follows: 1. It was demonstrated that the conditions of bridge decks can be cost-effectively and efficiently assessed using the GPR tool. 2. The GPR tool's ability to provide rapid and reliable results in comparison with conventional bridge deck condition assessment techniques was established. 3. The qualitative and quantitative relationships between the GPR …

Distributed State Verification In The Smart Grid Using Physical Attestation, Thomas Patrick Roth

Doctoral Dissertations

"A cyber process in a distributed system can fabricate its internal state in its communications with its peers. These state fabrications can cause other processes in the distributed system to make incorrect control decisions. Cyber-physical systems have a unique advantage in the detection of falsified states because processes typically have observable effects on a shared physical infrastructure. This physical infrastructure acts as a high-integrity message channel that broadcasts changes in individual process states. The objective of this research is to demonstrate that there are cases where physical feedback from the shared infrastructure can be used to detect state fabrications. To …

On The Deployment Of On-Chip Noise Sensors, Tao Wang

Doctoral Dissertations

"The relentless technology scaling has led to significantly reduced noise margin and complicated functionalities. As such, design time techniques per se are less likely to ensure power integrity, resulting in runtime voltage emergencies. To alleviate the issue, recently several works have shed light on the possibilities of dynamic noise management systems. Most of these works rely on on-chip noise sensors to accurately capture voltage emergencies. However, they all assume that the placement of the sensors is given. It remains an open problem in the literature how to optimally place a given number of noise sensors for best voltage emergency detection. …

Non-Destructive And Destructive Bridge Deck Condition Assessment, Aleksandra V. Varnavina

Doctoral Dissertations

"The dissertation is composed of three papers, which cover the lack of information on the specific aspects of non-destructive and destructive bridge deck assessment.

In the first paper, appropriate data acquisition and processing parameters for concrete bridge deck condition assessment using ground-coupled ground penetrating radar are developed. The use of proposed parameters helps to significantly reduce acquisition and processing time, while providing engineers with reliable and detailed information on the condition of bridge deck.

In the second paper, a novel approach to develop relationship between GPR data and concrete removal depth measurements collected after hydrodemolition is proposed. A linear relationship …

Essays On Unit Root Testing In Time Series, Xiao Zhong

Doctoral Dissertations

"Unit root tests are frequently employed by applied time series analysts to determine if the underlying model that generates an empirical process has a component that can be well-described by a random walk. More specifically, when the time series can be modeled using an autoregressive moving average (ARMA) process, such tests aim to determine if the autoregressive (AR) polynomial has one or more unit roots. The effect of economic shocks do not diminish with time when there is one or more unit roots in the AR polynomial, whereas the contribution of shocks decay geometrically when all the roots are outside …

Cormem Digital Reasoning Architecture Using Cmos Technology, Indira Priyadarshini Dugganapally

Doctoral Dissertations

”This dissertation describes the application of a multi-level, memory-based approach for building digital circuits. To reflect the alternative approach, the basic science is termed digital reasoning and the specific CorMem technology is based on recent patents. CMOS transistors are used in a non-traditional way for multi-level operations and memory manipulation. The combination of multi-level architectures and matrix algebra principles can create flexible, modular systems using standard fabrication methods and can avoid many of the limitations of other multi-valued logic approaches.

Quaternary, memory-based systems are developed to implement logic-gate-type functions, digital adder circuits, a complete arithmetic and logic unit (ALU), quaternary-to-binary …

Mechanistic Modeling Of Cutting Forces In Wavy-Edge Bull-Nose Helical End-Milling Of Inconel 718 Under Different Cooling-Lubrication Strategies, Abdulhakim Ali Sultan

Doctoral Dissertations

“This research presents the results of the development of a mechanistic cutting force prediction model for the wavy-edge bull-nose helical endmill (WEBNHE). The mechanistic model was developed to predict cutting force components and the resultant cutting force in high-speed end-milling of Inconel 718 under two cooling strategies: emulsion and Minimum Quantity Lubrication (MQL). The effects of the cooling strategies are incorporated into the mechanistic model through six cutting force coefficients (K_tc, K_rc, K_ac), and edge force coefficients (K_te, K_re, K_ae), which have been experimentally identified in a separate …

Bridging The Information Gap For Ulcerative Colitis Patients, Amanda Morgan

Graduate Theses/Dissertations

Nearly all humans, throughout the course of their life, have been diagnosed with everything from a mild cold, to a viral infection, or perhaps a diagnosis of a chronic condition. Upon experiencing symptoms, patients are exposed to a plethora of information. The Internet holds home remedies, for those wary of the doctor's office, or there are advice boards where people share their experiences, trials, and tribulations. In some cases, the doctor is the purveyor of the information and written materials are sent home with the patient dictating the regimen to follow to achieve wellness. However, some patients, particularly ulcerative colitis …

Active - Passive Spent Fuel Interrogation Using Neutrons And Photons, Tayfun Akyurek

Doctoral Dissertations

“This dissertation consists of three main parts. The first part is devoted to the comprehensive dead-time calculations with different detectors and conditions using different dead-time models as well as computer simulations. The minimum time that must separate two detectable events is called the counting system’s dead-time. If events take place during the system’s dead-time, they will not be recorded and will be lost. Such lost information is very important in many applications including high-intensity spectroscopy and nuclear spent fuel interrogations. The second part, a multitude of fission products identified as candidates have been scrutinized for their suitability of burnup analysis …

Fy 2015 Annual Report On The Quality Of Kerosene And Motor Fuel In Tennessee, Tennessee. Department Of Agriculture

Annual Reports on Kerosene & Motor Fuel Quality

This annual report provides data on the effectiveness of the 1989 Kerosene and Motor Fuels Quality Inspection Act, consumer complaints, inspection data, and a summary of enforcement.

Drones, Henry H. Perritt Jr., Eliot O. Sprague

Vanderbilt Journal of Entertainment & Technology Law

Drones represent the latest revolution in civilian aviation. The sophisticated miniaturized electronics, electric propulsion systems, low cost, and ability to capture close-in imagery make microdrones attractive assets for aerial activities that have never before been feasible. Larger configurations--machodrones--have longer endurance and range and the capability to fly at higher altitudes. They will complement manned airplanes and helicopters in missions for which their cost proves advantageous or for which manned flight is too hazardous or otherwise undesirable. Specific features of electric propulsion, control systems, and the capability of autonomous flight maneuvers will stimulate new types of missions for microdrones; in other …

Losing The Best And The Brightest: The Disappearing Wage Premium For H-1b Visa Recipients, Danielle M. Drago

Vanderbilt Journal of Entertainment & Technology Law

The pressure for immigration reform in the technology industry revolves heavily around the use of the H-1B visa, which allows companies to temporarily hire highly skilled workers. This Note provides an empirical analysis of the historical wages of H-1B workers and domestic workers in the technology industry to determine whether H-1B workers earn more or less than domestic workers in the same industry. In the technology industry, H-1B workers' wage premium has eroded in recent years relative to domestic workers, leading to stagnant wages that may deter the "best and the brightest" from choosing to enter into the H-1B process. …

Initial Interest Confusion "Internet Troika" Abandoned? A Critical Look At Initial Interest Confusion As Applied Online, Connie D. Nichols

Vanderbilt Journal of Entertainment & Technology Law

The Ninth Circuit's opinion in Brookfield Communications, Inc. v. West Coast Entertainment Corp. seemingly created a standard to be applied in trademark infringement cases on the Internet. Despite the cautions contained within the Ninth Circuit's holding, Brookfield ushered in an era in which many courts placed emphasis on three factors of the "likelihood of confusion" test finding initial interest confusion in many online infringement cases based solely on these three factors. For over a decade, inconsistent application within the Ninth Circuit and other jurisdictions created a disjointed body of case law on initial interest confusion online. The Ninth Circuit's opinion …

Invalidated Patents And Associated Patent Examiners, Shine Tu

Vanderbilt Journal of Entertainment & Technology Law

This study attempts to determine whether there are common characteristics between examiners who issue invalidated patents. This study uses two new patent databases that code for nearly 1.7 million patents and approximately one thousand patents that were litigated to a 'final" judgment between 2010 and 2011. This study finds that approximately one-third of patents that are litigated to final judgment are found invalid. Most invalidated patents are found in technology centers 1600, 2600, and 2700, which correspond to biotechnology and organic chemistry, communications, and computer science, respectively. Most patents are invalidated on prior art-type novelty and obviousness grounds. This study …

The Ironies Of Automation Law: Tying Policy Knots With Fair Automation Practices Principles, Meg L. Jones

Vanderbilt Journal of Entertainment & Technology Law

Rapid developments in sensors, computing, and robotics, including power, kinetics, control, telecommunication, and artificial intelligence have presented opportunities to further integrate sophisticated automation across society. With these opportunities come questions about the ability of current laws and policies to protect important social values new technologies may threaten. As sophisticated automation moves beyond the cages of factories and cockpits, the need for a legal approach suitable to guide an increasingly automated future becomes more pressing. This Article analyzes examples of legal approaches to automation thus far by legislative, administrative, judicial, state, and international bodies. The case studies reveal an interesting irony: …

In Vivo Detection Of Hyperoxia-Induced Pulmonary Endothelial Cell Death Using 99mTc-Duramycin, Said H. Audi, Elizabeth R. Jacobs, Ming Zhao, David L. Roerig, Steven T. Haworth, Anne V. Clough

Biomedical Engineering Faculty Research and Publications

Introduction

^99mTc-duramycin, DU, is a SPECT biomarker of tissue injury identifying cell death. The objective of this study is to investigate the potential of DU imaging to quantify capillary endothelial cell death in rat lung injury resulting from hyperoxia exposure as a model of acute lung injury.

Methods

Rats were exposed to room air (normoxic) or > 98% O₂ for 48 or 60 hours. DU was injected i.v. in anesthetized rats, scintigraphy images were acquired at steady-state, and lung DU uptake was quantified from the images. Post-mortem, the lungs were removed for histological studies. Sequential lung sections were immunostained …

Preliminary Investigation Into The Cause Of Pinhole Porosity In Aluminum Metal Castings From Serpentine Impurities In Olivine Sand, Brodie J. Biersner

Dissertations and Theses @ UNI

The problem addressed in this study is how contaminates in the foundry molding aggregate olivine, affect aluminum castings during the casting process. This research will concentrate on hydrated contaminates, specifically the mineral serpentine. The purpose of this research is to better understand how hydrated minerals contribute to the generation of pinhole porosity defects during the casting process. Understanding how impurities in foundry aggregates affect the casting process would aid in the reduction of scrap caused by core and molding sands, ultimately providing savings to the casting manufacturer.

A foundry grade olivine was compared to a new source of olivine to …

Best Practices In Computational Fluid Dynamics Modeling Of Cerebral Aneurysms Using Ansys Cfx, Emily Rose Nordahl

Mechanical Engineering and Applied Mechanics

Today many researchers are looking toward computational fluid dynamics (CFD) as a tool that can help doctors understand and predict the severity of aneurysms, but there has yet to be any conclusive proof of the accuracy or the ease of implementation of this CFD analysis. To help solve this issue, CFD simulations were conducted to compare these setup practices in order to find the most accurate and computationally efficient setup. These simulation comparisons were applied over two CFD group challenges from the CFD community whose goal was not only to assess modeling accuracy, but the analysis of clinical use and …

Dried Distillers Grains With Solubles As A Multifunctional Filler In Wood Particleboards, David John Sundquist

Mechanical Engineering and Applied Mechanics

Dried Distillers Grains with Solubles (DDGS) has been investigated for its use as a functional filler in wood particleboards bonded with Melamine Urea Formaldehyde. Both the concentration of the DDGS filler – 5, 10, and 15 wt. % – and the particle size of the filler – 125, 300, and 500 μm – has been considered. It was presumed that the additional protein and fats in the lignocellulosic DDGS would increase strength and water resistance of the particleboards. Chemical analysis, thermogravimetric analysis, and differential scanning calorimetry were used to analyze the DDGS filler. A variety of mechanical tests were performed …

The Use Of Electrospun Soy Protein Isolate/Polyvinyl Alcohol Nanofibers For Controlled Drug Delivery As Well As Investigation Into Mass Production, David Paul Gutschmidt

Mechanical Engineering and Applied Mechanics

As the global movement progresses towards environmental awareness, industries are attempting to become less dependent on petroleum based materials. This study investigates the incorporation of Soy Protein Isolate (SPI) into nanofibers and their potential applications. Initially mechanical testing was conducted; it was found that at 1:1 ratio of SPI to polymer (PVA) was optimal. For drug release test, SPI based nanofibers were tested via three formulations including nanoparticle implementation. Results observed that loading the drug onto the nanoparticle showed sustained release, ~67% release at 70 hours. Mathematical models of both diffusion and erosion confirmed experimental findings. SPI based nanofibers were …

Optimized Evaluation Of Bone Tissue Material Properties By Inverse Finite Element Analysis And Femur Fracture Testing, Samad Javid

Mechanical Engineering and Applied Mechanics

The main objective of this research is to characterize bone inhomogeneous elastic, yield, and post-yield behaviors, using a computational-experimental approach. The current study uses the force-displacement results of one hundred four cadaveric femora that were previously tested to fracture in a fall on the hip loading configuration. Recorded force-displacement data are used to determine stiffness, yield force, and femoral strength values. Finite element (FE) models of the femora are developed from the quantitative computed tomography scans captured before the fracture tests. A power law, or a sigmoid function, is used to determine the elastic modulus from the ash densities for …

Employment Needs Of The Age 21 And Over Id Population In South Florida : An Occupational Therapy Perspective, Ingris Treminio

Occupational Therapy Program Student Theses, Dissertations and Capstones

A review in the literature makes it evident that employment needs of the age 21 and over ID population are not being met; the employment rate for this population continues to be less than half of the employment rate of the general population (Siperstein et al., 2013). There is evidence that occupational therapy has the potential to meet the employment needs of this population, however, practice guidelines for occupational therapists working with this population are limited. This study recruited seven participants and interviewed them using a needs assessment approach to investigate the employment needs of the age 21 and over …

Graphene Electrode Modified With Electrochemically Reduced Graphene Oxide For Label-Free Dna Detection, Bing Li, Genhua Pan, Neil D. Avent, Roy B. Lowry, Tracey E. Madgett, Paul L. Waines

School of Engineering, Computing and Mathematics

No abstract provided.

Wave Farm Impact On Beach Modal State, J. Abanades, D. Greaves, G. Iglesias

School of Engineering, Computing and Mathematics

No abstract provided.

Buckling Analysis Of Partially Protected Cold-Formed Steel Channel-Section Columns At Elevated Temperatures, Shanshan Cheng, Long Yuan Li, Boksun Kim

School of Engineering, Computing and Mathematics

No abstract provided.