Digital Commons Network^™

Modeling Explosive Lensing On A Cylindrical Body In Air: A First Step Towards Sealing An Underwater Offshore Oil Spill, Phillip R. Mulligan

Doctoral Dissertations

"In 2010, the British Petroleum (BP) Deepwater Horizon accident leaked oil into the Gulf of Mexico for 87 days. A fast response method that can seal an oil pipe and stop the release of oil is needed in order to prevent future oil leaks from turning into ecological and financial disasters. Explosives can serve this need.

This research examined how a circular implosive discontinuous explosive lens interacts with a cylindrical surface. The following research was designed to study the applicability of the Method this author developed to predict the peak pressure from multiple shockwaves converging on a centrally located cylinder. …

Low-Complexity Iterative Receiver Algorithms For Multiple-Input Multiple-Output Underwater Wireless Communications, Weimin Duan

Doctoral Dissertations

"This dissertation proposes three low-complexity iterative receiver algorithms for multiple-input multiple-output (MIMO) underwater acoustic (UWA) communications. First is a bidirectional soft-decision feedback Turbo equalizer (Bi-SDFE) which harvests the time-reverse diversity in severe multipath MIMO channels. The Bi-SDFE outperforms the original soft-decision feedback Turbo equalizer (SDFE) while keeping its total computational complexity similar to that of the SDFE. Second, this dissertation proposes an efficient direct adaptation Turbo equalizer for MIMO UWA communications. Benefiting from the usage of soft-decision reference symbols for parameter adaptation as well as the iterative processing inside the adaptive equalizer, the proposed algorithm is efficient in four aspects: …

Lifetime And Effectiveness Evaluation Of Ceramic Pot Filters, Carlo Salvinelli

Doctoral Dissertations

"Poor water quality is a major contributing factor to disease in developing countries. Ceramic pot filters (CPFs) represent an effective and sustainable technology for poor communities, but the characterization of CPF lifetimes is on-going, and the water production seems to be the limiting factor. This dissertation describes laboratory and field investigations conducted to characterize the parameters that impact CPF effectiveness and lifetime in terms of water production and treatment efficacy, both under controlled and real use conditions.

CPF initial flow rate is the most common quality control parameter, but it may not be representative of the long-term effectiveness of the …

Liposomal Delivery Of Pde5 Inhibitors And Ut-15c To Human Erythrocytes, Elizabeth Anne Bowles

Doctoral Dissertations

"Previous studies have shown that the controlled release of adenosine triphosphate (ATP) from human erythrocytes is an important mechanism for the regulation of vascular caliber. However, erythrocytes from patients with pulmonary arterial hypertension (PAH) fail to release ATP in response to the physiological stimuli of exposure to low oxygen tension or mechanical deformation of a magnitude these cells would encounter in the pulmonary circulation. This defect could be a significant contributor to the increased pulmonary vascular resistance (PVR) that is the cause of the pathological increase in vascular pressures in humans with PAH.

One important approach to the treatment of …

Uncertainty Quantification Applied To The Analysis And Design Of A Hypersonic Inflatable Aerodynamic Decelerator For Spacecraft Reentry, Andrew J. Brune

Doctoral Dissertations

"The primary objective of this research is to investigate the uncertainty in the multidisciplinary analysis of a Hypersonic Inflatable Aerodynamic Decelerator configuration for Mars entry, subject to uncertainty sources in the high-fidelity computational models and the operating conditions. Efficient uncertainty quantification methods based on stochastic expansions are applied to the analysis of the hypersonic flowfield, fluid-structure interaction, and flexible thermal protection system response of a deformable inflatable decelerator. Uncertainty analysis is first applied to the hypersonic flowfield simulations to quantify the uncertainty in the surface convective and radiative heat flux, pressure, and shear stress of a fixed inflatable decelerator, subject …

Polyacrylamide And Its Derivatives For Oil Recovery, Zun Chen

Doctoral Dissertations

"Polyacrylamide is an umbrella term used to describe the homo-polymer of acrylamide and the copolymer of acrylamide with a small amount of other monomers. Owing to their superior property on increasing viscosity and gelling ability in the presence of crosslinkers, polyacrylamides has become the primarily selection for polymer flooding and gel treatment agent in enhanced oil recovery. Recent developments, performance, applications and limitations of polyacrylamides and its derivatives, including copolymers and hydrogels for enhancing oil recovery are reviewed.

A water-free suspension system was developed to synthesize PAMs and PAMs-microgel. Products are dry particle powder and ready to disperse in water. …

High-Voltage-Gain Dc-Dc Power Electronic Converters -- New Topologies And Classification, Bhanu Prashant Reddy Baddipadiga

Doctoral Dissertations

"This dissertation proposes two new high-voltage-gain dc-dc converters for integration of renewable energy sources in 380/400V dc distribution systems. The first high-voltage-gain converter is based on a modified Dickson charge pump voltage multiplier circuit. The second high-voltage-gain converter is based on a non-inverting diode-capacitor voltage multiplier cell. Both the proposed converters offer continuous input current and low voltage stress on switches which make them appealing for applications like integration of renewable energy sources. The proposed converters are capable for drawing power from a single source or two sources while having continuous input current in both cases. Theoretical analysis of the …

Seismic Anisotropy And Mantle Dynamics Beneath The Central And Western United States, Bin Yang

Doctoral Dissertations

"Various tectonic features and the recent availability of high-quality broadband seismic data from the USArray and other seismic stations in the central and western United States (CWUS) provide a distinct opportunity to test different anisotropy-forming mechanisms. For the first part of the study, a total of 4138 pairs of well-defined shear wave splitting (SWS) parameters observed at 445 stations on the northern Great Plains show systematic spatial variations of anisotropic characteristics. Azimuthally invariant fast orientations subparallel to the absolute plate motion (APM) direction are observed at most of the stations on the Superior Craton and the southern Yavapai province, indicating …

Methodology For Analysis Of Stress, Creep, And Fatigue Behavior Of Compliant Mechanisms, Joshua Allen Crews

Doctoral Dissertations

"A methodology is developed for analyzing stress within homogeneous and metallic-reinforced, fixed-free compliant segments and small-length flexural pivots. Boundary conditions related to the inclusion of metallic reinforcing components within a polymer compliant segment are investigated. The analysis method outlined herein relies on key outputs from the pseudo-rigid-body models (PRBMs). A method is presented for the redesign of compliant mechanisms to include metallic reinforcement to reduce stress while maintaining force-deflection behavior. Examples are provided in which a compliant segment is redesigned to include metallic reinforcement by using the stress equations developed from the PRBM. The effect of bonding between the polymer …

Adaptive Consensus Based Formation Control Of Unmanned Vehicles, Haci Mehmet Guzey

Doctoral Dissertations

"Over the past decade, the control research community has given significant attention to formation control of multiple unmanned vehicles due to a variety of commercial and defense applications. Consensus-based formation control is considered to be more robust and reliable when compared to other formation control methods due to scalability and inherent properties that enable the formation to continue even if one of the vehicles experiences a failure. In contrast to existing methods on formation control where the dynamics of the vehicles are neglected, this dissertation in the form of four papers presents consensus-based formation control of unmanned vehicles-both ground and …

Development And Evaluation Of A Coaxial Cable Sensing System For Co₂ Sequestration Wellbore Integrity Monitoring, Yurong Li

Doctoral Dissertations

"Downhole monitoring plays a crucial part in geological carbon dioxide (₂) sequestration. Various downhole monitoring technologies have been explored and applied, but they are either expensive or have system longevity issues. To address this issue, a robust and cost-effective downhole sensing system based on distributed coaxial cable sensors is developed and evaluated in laboratory, and a numerical simulation with staged finite element model is conducted to study the feasibility of using the coaxial cable sensing system for monitoring and evaluation of wellbore stability during CO₂ injection.

The real-time distributed sensing system is composed of Fabry-Perot interferometer based …

Research On Hybrid Manufacturing Using Industrial Robot, Zhiyuan Wang

Doctoral Dissertations

"The applications of using industrial robots in hybrid manufacturing overcome many restrictions of the conventional manufacturing methods, such as small part building size, long building period, and limited material choices. However, some problems such as the uneven distribution of motion accuracy within robot working volume, the acceleration impact of robot under heavy external loads, few methods and facilities for increasing the efficiency of hybrid manufacturing process are still challenging. This dissertation aims to improve the applications of using industrial robot in hybrid manufacturing by addressing following three categories research issues. The first research issue proposed a novel concept view on …

New Polyanion-Based Cathode Materials For Alkali-Ion Batteries, Hooman Yaghoobnejad Asl

Doctoral Dissertations

"A number of new materials have been discovered through exploratory synthesis with the aim to be studied as the positive electrode (cathode) in Li-ion and Na-ion batteries. The focus has been set on the ease of synthesis, cost and availability of active ingredients in the battery, and decent cycle-life performance through a combination of iron and several polyanionic ligands. An emphasis has been placed also on phosphite (HPO₃^2-) as a polyanionic ligand, mainly due to the fact that it has not been studied seriously before as a polyanion for cathode materials. The concept of mixed polyanions, for …

Efficient Time-Dependent System Reliability Analysis, Zhifu Zhu

Doctoral Dissertations

"Engineering systems are usually subjected to time-variant loads and operate under time-dependent uncertainty; system performances are therefore time-dependent. Accurate and efficient estimate of system reliability is crucial for decision makings on system design, lifetime cost estimate, maintenance strategy, etc. Although significant progresses have been made in time-independent reliability analysis for components and systems, time-dependent system reliability methodologies are still limited. This dissertation is motivated by the need of accurate and effective reliability prediction for engineering systems under time-dependent uncertainty. Based on the classic First and Second Order Reliability Method (FORM and SORM), a system reliability method is developed for multidisciplinary …

Identifying Shallow Subsurface Stratigraphy And Voids Using Dispersive Characteristics Of Electromagnetic And Surface Waves, Payman Hajiani

Doctoral Dissertations

"This dissertation presents the results of three manuscripts on spectral analysis of electromagnetic and seismic surface waves to detect subsurface stratigraphy and voids. In the first manuscript, a new technique was developed by utilizing spectral analysis of surface waves to detect subsurface openings. This technique applied the concept of group delay to evaluate the effects of subsurface voids on the phase shift domain. Seismic data sets were acquired at different sites where the shape, size, and depth of the void varied. In all surveys, the time delay technique precisely identified the locations of the subsurface openings. The second manuscript presents …

Innovative Techniques For Seismic-Resistant Bridge Columns Under Ground Motion Excitations, Ayman A. Moustafa

Doctoral Dissertations

“This dissertation provides innovative alternative solutions for replacing conventional reinforced concrete columns. The proposed columns displayed enhanced seismic resistance and properties compared to their counterpart conventional columns. Two main techniques were followed and proposed to develop seismic-resistant columns. The first technique utilized rubberized concrete to internally enhance energy dissipation and damping. Materials testing of rubberized concrete with scrap tire replacement of fine aggregates were performed to evaluate its dynamic properties. Shaking table testing of a rubberized concrete column was performed and the behavior was compared to that of the conventional one. The rubberized column showed an increase of 16% in …

Using Relevance To Inspire Engagement In Disengaged Secondary Mathematics Students, Cherie Lynn Burkett

Graduate Theses/Dissertations

With the advances being made in technology, our nation is in dire need of a work force degreed with mathematics and science. In the past few decades, the United States has seen a decline in the proportion of college graduates who majored in mathematics-intensive subjects. If our demand is high, why is our supply decreasing? Research suggests that traditional teaching methods using skills-based curricula make it difficult for students to take an interest in a confusing topic like mathematics in which they see no immediate relevance. I have spent a semester engaged in action research taking steps to increase student …

Us Government Antitrust Intervention In Standard-Setting Activities And The Competitive Process, Alden F. Abbott

Vanderbilt Journal of Entertainment & Technology Law

The private sector historically has driven the setting of technical standards in the United States, with the federal government only intervening in response to perceived violations of specific statutes, such as antitrust laws. This concern is reflected in case law and in advice proffered by US antitrust enforcers. Recently, however, US enforcers have turned their attention primarily to the alleged misuse of monopoly power over patents that cover technologies embodied in standards. This new focus threatens to undermine innovation and departs from sound antitrust enforcement policy. American antitrust enforcers should redirect their priorities away from alleged single-firm, patent-related abuses associated …

Innovation Rewards: Towards Solving The Twin Market Failures Of Public Goods, Gregory N. Mandel

Vanderbilt Journal of Entertainment & Technology Law

The challenge of achieving socially optimal incentives for innovation in public goods faces twin market failures: a market failure to adequately promote public goods invention and a market failure to implement innovative public goods once developed. Though innovation in private goods sometimes faces the former hurdle, often ameliorated by intellectual property law, the interaction of both market failures for public goods innovation raises unique difficulties.

Environmentally beneficial technology presents an illustration of the innovation problem for public goods. Private actors lack sufficient incentives both to engage in environmentally beneficial innovation and to implement such innovation. While traditional intellectual property law …

Alternatives To March-In Rights, David S. Bloch

Vanderbilt Journal of Entertainment & Technology Law

The Bayh-Dole Act is an inspired piece of legislation. But its "march-in" provisions are too often a source of confusion and fear for private-sector companies that want to do business with the US government--despite the fact that the government has never exercised its march-in rights. Are there alternatives to march-in rights that would effectively serve the government's public policy needs while eliminating this perceived threat to private intellectual property rights? This Article describes march-in rights in theory and practice, and then weighs several alternatives to traditional Bayh-Dole march-in rights.

Publication Of Government-Funded Research, Open Access, And The Public Interest, Julie L. Kimbrough, Laura N. Gasaway

Vanderbilt Journal of Entertainment & Technology Law

Public access to government-funded research is an issue of tremendous importance to researchers, librarians, and ordinary citizens around the world. Based on the notion that taxpayers finance research through their tax dollars, research data should be available to them. Rapid, unfettered access to research publications provides access to medical research to patients, encourages further exploration and inquiry by other researchers, informs citizens, and advances scientific research.

Scientists typically write articles that divulge the results of their government-funded research. Prior to the open access movement, these articles were published in commercially produced journals. Subscriptions to these journals are expensive, and cost …

Government As Owner Of Intellectual Property? Considerations For Public Welfare In The Era Of Big Data, Ruth L. Okediji

Vanderbilt Journal of Entertainment & Technology Law

Open government data policies have become a significant part of innovation strategies in many countries, allowing access, use and re-use of government data to improve government transparency, foster civic engagement, and expand opportunities for the creation of new products and services. Rarely, however, do open data policies address intellectual property rights that may arise from free access to government data. Ownership of knowledge goods created from big data is governed by the default rules of intellectual property laws which typically vest ownership in the creator/inventor. By allowing, and in some cases actively encouraging, private capture of the downstream goods created …

The Shaky Ground Of The Right To Be Delisted, Miquel Peguera

Vanderbilt Journal of Entertainment & Technology Law

It has long been discussed whether individuals should have a "right to be forgotten" online to suppress old information that could seriously interfere with their privacy and data protection rights. In the landmark case of Google Spain v. Agencia Espafiola de Proteccion de Datos, the Court of Justice of the European Union (CJEU) addressed the particular question of whether, under EU Data Protection Law, individuals have a right to have links delisted from the list of search results in searches made on the basis of their name. It found that they do have this right--which can be best described as …

Lenz V. Universal: A Call To Reform Section 512(F) Of The Dmca And To Strengthen Fair Use, Marc J. Randazza

Vanderbilt Journal of Entertainment & Technology Law

Under 17 U.S.C. § 512(f) of the Digital Millennium Copyright Act (DMCA), those who issue materially false takedown notices are liable for damages. However, Section 512(f) has not effectively protected fair use. Currently, the DMCA issuer only has to prove he considered fair use before issuing a takedown notice, but faces no liability for actually taking action against fair use. The outcome of the recent Ninth Circuit Court of Appeals case Lenz v. Universal shows the flaws in the language of the DMCA. This Article calls for a mild adjustment to Section 512(f) for the purpose of protecting fair use …

How Smart Is Too Smart?: How Privacy Concerns Threaten Modern Energy Infrastructure, Megan Mclean

Vanderbilt Journal of Entertainment & Technology Law

Smart meters are integral to the health of our electric grid and are critical to a reliable, affordable, and efficient energy economy. Yet, collection of smart meter data is raising privacy concerns that are inspiring pockets of resistance to smart meter installation around the country. The fact that these data, like many other kinds of personal information, can and often do flow to the government should not prevent their collection and use. It is critical for environmental and energy regulators to have access to this data to maximize the potential of our energy system. On the state level, several legislatures …

On Climate Change And Cyber Attacks: Leveraging Polycentric Governance To Mitigate Global Collective Action Problems, Scott J. Shackelford

Vanderbilt Journal of Entertainment & Technology Law

Although cyberspace and the atmosphere are distinct arenas, they share similar problems of overuse, difficulties of enforcement, and challenges of collective inaction and free riders. With weather patterns changing, global sea levels rising, and temperatures set to exceed 1.5 degrees Celsius by 2100, climate change is a problem that affects the entire world. Yet its benefits are dispersed, and its harms are often concentrated. Similarly, much of the cost of cyber attacks is focused in a few nations even as others are becoming havens for cybercriminals. Yet it is also true that actions taken by a multiplicity of actors on …

Instrumental And Transformative Medical Technology, Nicole Huberfeld Professor Of Law

Vanderbilt Journal of Entertainment & Technology Law

This Article considers how medical technologies impact universality in health care. The universality principle, as embodied in the Patient Protection and Affordable Care Act (ACA), eliminated widespread discriminatory practices and provided financial assistance to those otherwise unable to become insured--a democratizing federal act that was intended to stabilize health care policy nationwide. This Article posits that medical technology, as with all of medicine, can be universalizing or exclusionary and that this status roughly correlates to its being "instrumental technology" or "transformative technology." Instrumental technology acts as a tool of medicine and often serves an existing aspect of health care; in …

Will The Internet Of Things Transform Healthcare?, Nicolas P. Terry, Professor Of Law,

Vanderbilt Journal of Entertainment & Technology Law

Emerging technologies like health apps on mobile computing platforms and wearable devices are believed to have the potential to improve individual and population health. Increasingly, however, attention should extend to a far larger cohort of connected devices known as the Internet of Things (IoT), an environment in which devices communicate with each other, health apps, and wearables. The resulting Internet of Health Things promises to do things conventional health providers either cannot do or do them faster and cheaper. First, services are "always on, "providing twenty-four/seven monitoring of the patient or pre-patient. Second, the multiple sensors contained in smartphones or …

Customized Medicine And The Limits Of Federal Regulatory Power, Anna B. Laakmann

Vanderbilt Journal of Entertainment & Technology Law

The Food and Drug Administration (FDA) plays a dominant role in setting national policy and standards for the biomedical industry. Yet there are significant statutory constraints on the agency's power. The FDA's main implementing statute, the Federal Food, Drug, and Cosmetic Act (FDCA), bounds the scope of the FDA's regulatory authority. The FDCA cabins FDA power in two important ways: (1) with a few notable exceptions, the FDA lacks power to regulate local activities that are not directly connected to interstate commerce, and (2) the agency may regulate product manufacturers, but not service providers. The FDA has long grappled with …

The Urbanism Of Frank Lloyd Wright, Michael Lewis

Art Inquiries

Book review of The Urbanism of Frank Lloyd Wright, by Neil Levine.