Digital Commons Network^™

Electrical Resistivity Of Liquid Alkali Na-Based Binary Alloys, Aditya M. Vora

Turkish Journal of Physics

The study of the electrical resistivity \rho_L of alkali Na-based binary alloys Na_{1-x}Li_x, Na_{1-x}K_x, Na_{1-x}Rb_x and Na_{1-x}Cs_x have been made by well-recognized model potential of Gajjar et al. The most recent exchange and correlation functions due to Farid et al (F) and Sarkar et al (S) are used for the first time in the study of electrical resistivity of liquid binary mixtures and found suitable for such study. The results, due to the inclusion of Sarkar et al's local field correction function, are found superior to those obtained due to Farid et al's local field correction function. Electrical resistivity of …

Selective Laser Sintering Of Stearic Acid-Coated Alumina Ceramic, Jason J. Nolte

Masters Theses

"The purpose of this research is to develop a process that will enable a Selective Laser Sintering (SLS) machine to create geometrically complex green parts of various sizes that become strong, dense ceramic parts after sintering. This will be applicable to SLS systems already operational in industry, and may offer a more cost-effective, more time-efficient method for producing high-temperature ceramic rapid prototype parts. Alumina was the chosen ceramic for the developmental stage of this research. Fine alumina powder (average particle size of 0.4 µm) was coated with stearic acid, which served as a binder. Green parts were made from this …

Detection Of Flash In Dermoscopy Skin Lesion Images, Radhika Nagane

Masters Theses

"Dermoscopy images of skin lesions are often acquired by covering the skin with mineral oil, alcohol, another liquid or a gel and illuminating the area at a low angle of incidence from all directions before taking the photograph. Deeper pigment patterns are more visible in this type of image than in a clinical image because the liquid immersion and structured light effectively make the upper layers of the skin more transparent. Flash regions are the small, high reflectance areas in the image where direct reflections of the illumination source(s) cause undesirable bright spots in the image. These flash regions may …

The Dynamics Of Daily Retail Gasoline Prices, Michael C. Davis

Economics Faculty Research & Creative Works

Previous research has analyzed the behavior of retail gasoline stations in how they adjust their prices. In this paper we analyze the daily movements in prices of four retail gasoline stations located in Newburgh, New York. We find some evidence to support the notion that the behavior is explained by menu costs. There is substantial evidence that the firms adjust their prices asymmetrically, being more inclined to increase than to decrease prices. We conclude that the pricing behavior is being determined by a combination of search costs for the consumers and menu costs for the producers. Copyright © 2007 John …

Data Fusion Techniques For Health Monitoring Of Aging Aircraft And Skin Cancer Detection, Kapil Gupta

Doctoral Dissertations

"Data fusion is generally practiced to enhance decision or inference making capability. Sensor and information source data may often be corrupted by noise or other factors. Data fusion can be used to improve sensor and/or information source data quality and reliability and improve detection accuracy. There are several types of data fusion, including raw data level, feature level, and decision level.

This work presents the investigation and development of image and signal processing, computational intelligence, fuzzy logic, and statistical techniques for different types of data fusion for a varied range of applications. Raw data and decision level fusion approaches are …

Development Of A Geographic Information System-Based Virtual Geotechnical Database And Assessment Of Liquefaction Potential For The St. Louis Metropolitan Area, Jae-Won Chung

Doctoral Dissertations

"The St. Louis Metropolitan area is the focus the U.S. Geological Survey's Earthquake Hazard Program's plan for assessing and reducing the likely risks of an earthquake likely emanating from New Madrid Seismic Zone (NMSZ), which is the most active seismic zone in the Midwestern United States. The St. Louis Metropolitan area consists of three counties in Missouri and four in Illinois, which are divided by the state boundary along the Mississippi River. Both of the state's respective geological surveys have produced their own geologic maps and datasets, employing dissimilar geodata information and systems, with differing map units, map scales, and …

The Development And Application Of A Systematic Approach To Evaluating An Academic Department's Brand Meaning, Cassandra C. Elrod

Doctoral Dissertations

"Research of existing literature indicates that below the university level, there has been little effort made in branding academia, namely academic departments. The lack of branding may significantly affect the perceptions that potential students and future employers of these students have about one of these academic units. The impact may be most significant for units where the fields of study that are represented by the department may be unclear, such as in the case of engineering management. However, even in the cases of better-understood fields of study, for example, electrical engineering, the competition for students with other fields of study …

Architecting System Of Systems: Artificial Life Analysis Of Financial Market Behavior, Nil Hande Ergin

Doctoral Dissertations

"This research study focuses on developing a framework that can be utilized by system architects to understand the emergent behavior of system architectures. The objective is to design a framework that is modular and flexible in providing different ways of modeling sub-systems of System of Systems. At the same time, the framework should capture the adaptive behavior of the system since evolution is one of the key characteristics of System of Systems. Another objective is to design the framework so that humans can be incorporated into the analysis. The framework should help system architects understand the behavior as well as …

Simple And Efficient Solutions To The Problems Associated With Acoustic Echo Cancellation, Asif Iqbal Mohammad

Doctoral Dissertations

"This dissertation is a collection of papers that addresses several important problems associated with acoustic/line echo cancellation (AEC/LEC), specifically double-talk and echo-path change detection. A double-talk detector is used to freeze AEC filter's adaptation during periods of near-end speech. This dissertation presents three different novel double-talk detection schemes. Simulations demonstrate the efficiency of the proposed algorithms"--Abstract, page iii.

Pilot Program To Assess Seismic Hazards Of The Granite City, Monks Mound, And Columbia Bottom Quadrangles, St. Louis Metropolitan Area, Missouri And Illinois, Deniz Karadeniz

Doctoral Dissertations

"Three 1:24000 scale quadrangles were selected for a pilot program intended to evaluate seismic site response across the spectrum of geologic conditions underlying the St. Louis Metropolitan area, using the Granite City, Monks Mound and Columbia Bottom quadrangles. These evaluations included assessments of: i) site amplification distributions; ii) probabilistic hazard analysis of PGA, 0.2 second and 1.0 second spectral accelerations for 2%, 5% and 10% probability of exceedance in 50 years; iii) two scenario earthquakes and their associated PGA, 0.2 sec, and 1 sec spectral accelerations; and v) sensitivity and uncertainty analyses. These hazard maps were prepared using a fully-probabilistic …

Bga Footprints Modeling And Physics Based Via Models Validation For Power And Signal Integrity Applications, Giuseppe Selli

Doctoral Dissertations

"Modeling and simulating the multi-scale nature of a power distribution network (PDN) is essential to ensure the correct functioning of the devices connected to it. Simple parallel-plate sections constitute the core of these PDN geometries, together with sections where a large number of holes and vias are present, as in the case of a BGA footprint. Employing a divide-and-conquer approach allows for the modeling of these geometries separately, i.e., 3-D full wave solvers for the sections with holes and vias, and a cavity model approach, for the simple parallel-plate structures. Also, equivalent circuit models can be obtained for time-domain and …

An Indirect Loss Estimation Methodology To Account For Regional Earthquake Damage To Highway Bridges, Chakkaphan Tirasirichai

Doctoral Dissertations

"This study proposes an integrated framework to estimate the indirect economic loss due to damaged bridges within the highway system from an earthquake event. The framework is designed to be general and convenient to apply to other study regions. In this dissertation, a simulated earthquake scenario centered in St. Louis Missouri with a magnitude 7.0 was used as a case study. The research results have clearly shown that the indirect losses are significant when compared to the direct loss. Policymakers can apply this study framework and the results as a guide and decision tool for developing an appropriate preventive action …

Mobile Array Designs With Anserlin Antennas And Efficient, Wide-Band Peec Models For Interconnect And Power Distribution Network Analysis, Michael A. Cracraft

Doctoral Dissertations

"A mobile, wide-band antenna system has been developed around the ANSERLIN antenna element and a 3-dB splitter design. The size of the antenna elements was reduced over previous versions by introducing dielectric substrates. Additionally, new variations of the antenna were designed to influence radiation characteristics. To further reduce the number of components in the array, a very low profile splitter was designed and mounted below one of the antenna elements, doubling as the return plane for the antenna. The partial-element equivalent circuit (PEEC) method has been used for 3D interconnect analysis and numerous other applications. Being based on the same …

Energy-Aware And Secure Routing With Trust Levels For Wireless Ad Hoc And Sensor Networks, Eyad Taqieddin

Doctoral Dissertations

"This dissertation focuses on the development of routing algorithms for secure and trusted routing in wireless ad hoc and sensor network. The first paper presents the Trust Level Routing (TLR) protocol, an extension of the optimized energy-delay routing (OEDR) protocol, focusing on the integrity, reliability and survivability of the wireless network...The second paper analyzes both OLSR and TLR in terms of survivability and reliability to emphasize the improved performance of the network in terms of lifetime and proper delivery of data...The third paper proposes a statistical reputation model that uses the watchdog mechanism to observe the cooperation of the neighboring …

Incipient Continental Rifting: Insights From The Okavango Rift Zone, Northwestern Botswana, Baraka D. Kinabo

Doctoral Dissertations

"In this dissertation aeromagnetic, gravity, and Shuttle Radar Topography Mission Digital Elevation Model (SRTM DEM) data from the Okavango Rift Zone in northwest Botswana are used to map the distribution of rift and basement structures. The distribution of these structures provide useful insights into the early stages of continental rifting. The objectives of this study are (1) assessing the role of pre-existing structures on rift basin development, (2) characterizing the geometry of the nascent rift basins, (3) documenting fault growth and propagation patterns, and (4) investigating the border fault development"--Abstract, page iv.

New Techniques To Improve Power Quality And Evaluate Stability In Modern All-Electric Naval Ship Power Systems, Peng Xiao

Doctoral Dissertations

"This dissertation focuses on two crucial issues in the design and analysis of the power electronic systems on modern all-electric naval ships, i.e., power quality control and stability evaluation. It includes three papers that deal with active power filter topology, active rectifier control, and impedance measurement techniques, respectively. To mitigate harmonic currents generated by high-power high-voltage shipboard loads such as propulsion motor drives, the first paper proposes a novel seven-level shunt active power filter topology, which utilizes tapped reactors for parallel operations of switching devices. The multi-level system has been implemented in both regular digital simulation and real-time digital simulator …

The Leaching Behavior Of Arsenic, Selenium And Other Trace Elements In Coal Fly Ash, Tian Wang

Doctoral Dissertations

"The goals of this study are four fold, they are: (1) to investigate the leaching behavior of arsenic and selenium from fly ash as well as their affecting factors; (2) to analyze the speciation of arsenic and selenium in fly ash leachate; (3) to develop a modeling approach to quantify the availability and stability of trace cationic elements in fly ash; (4) to apply this model to describe the leaching/adsorption behavior of arsenic and selenium on fly ash, as well as the calcium effect on arsenic (V) adsorption process"--Abstract, page iv.

Use Of Capacity Building Strategies In Non-Profit Speech And Hearing Centers: A National Study, Elizabeth Fogarty Larrimore

College of Graduate Studies: Theses & Dissertations

The purpose of this researchers study was to analyze the use of capacity building strategies in non-profit speech and hearing centers by examining the chief executive officers' (CEOs') perceptions of both actual and desired use of capacity building strategies in their organizations. A survey was sent to the 39 CEOs of non-profit speech and hearing centers who are member agencies of the National Association of Speech and Hearing Centers (NASHC). NASHC is a consortium of free standing, non-profit speech and hearing centers from around the United States. The survey consisted of a five point rating scale (1 = rarely done, …

Federal Student Loan Repayment Assistance For Public Interest Lawyers And Other Employees Of Governments And Nonprofit Organizations, Philip G. Schrag

Georgetown Law Faculty Publications and Other Works

The problem of high monthly repayment obligations for educational debt has long plagued students, particularly graduate and professional students, who desired lower-paying public interest careers. Congress has recently responded very positively. In the College Cost Reduction and Access Act of 2007, Congress has made it possible for high-debt, lower-income graduates to manage debt repayment through an "income-based repayment" plan. In addition, Congress has created a new program through which public servants -- including all government workers and all employees of all non-profit organizations that are tax-exempt under Section 501(c) (3) of the Internal Revenue Code --are entitled to have a …

Naming Rights: Attribution And Law, Rebecca Tushnet

Georgetown Law Faculty Publications and Other Works

This article identifies three basic frameworks that intellectual property theorists have used to support giving authors a right to attribution: authorial high-protectionism, which is concerned with respecting the unique role of authors; copyright low-protectionism, which is concerned with increasing access to copyrighted works and wishes to substitute credit for total control; and trademark-style consumer protectionism, which is concerned with giving consumers truthful and useful information about the works they choose. I examine these rationales, and the tensions between them, and conclude that attribution rights cannot fulfill their apparent promise to unite differing visions of intellectual property. Legitimate claims for credit …

Mris And The Perception Of Risk, Steven Goldberg

Georgetown Law Faculty Publications and Other Works

The most important safety decision concerning MRIs was to change the name of the procedure. In the late 1970s, the procedure known as nuclear magnetic resonance (NMR) became magnetic resonance imaging (MRI) because of the negative connotations the word “nuclear” invited. The change was understandable since MRIs do not expose patients to dangerous radiation: “nuclear” was in the original name because basic research on the atomic nucleus led to the development of MRIs. The main cost of the name change was to obscure the important link between basic research and useful medical technologies.

In recent years, however, MRIs, a generally …

Equality In The War On Terror, Neal K. Katyal

Georgetown Law Faculty Publications and Other Works

Today, much public attention and litigation in the wake of the government's response to the September 11, 2001 attacks centers on one or another claims about the government's substantive illegality (such as claims based on the Due Process Clause). This is a mistake. Instead of focusing on the ultimate individual liberty questions, challenges should first focus on equality.

Since the terrorist attacks, the government has repeatedly singled out aliens for special disfavor. For example, the Military Commissions Act blatantly discriminates against aliens - shunting the 20 million green-card holders and 5 billion people across the planet into a different, and …

‘Plucking The Mask Of Mystery From Its Face’: Jurisprudence And H.L.A. Hart, John Mikhail

Georgetown Law Faculty Publications and Other Works

Until recently, little was known of H.L.A. Hart's private life. That has now changed with the publication of Nicola Lacey's A Life of H.L.A. Hart: The Nightmare and the Noble Dream. Drawing on Hart's notebooks and correspondence, Lacey paints an illuminating portrait of Hart, which reveals that despite his public success he struggled with internal perplexities, including his sexual orientation, Jewish identity, intellectual insecurity, and unconventional marriage. Yet, as critics have noted, the connection between these revelations and the development of Hart's ideas is unclear. Moreover, one cannot help but wonder whether by focusing on these aspects of Hart's personal …

Three Pictures Of Contract: Duty, Power And Compound Rule, Gregory Klass

Georgetown Law Faculty Publications and Other Works

A fundamental divide among theories of contract law is between those that picture contract as a power and those that picture it as a duty. On the power-conferring picture, contracting is a sort of legislative act, in which persons determine what law will apply to their transaction. On the duty-imposing picture, contract law puts duties on persons entering into agreements for consideration whether they want them or not. Until now, very little attention has been paid to the problem of how to tell whether a given rule is power conferring or duty imposing -- a question that should lie at …

Do Charter Schools Threaten Public Education? Emerging Evidence From Fifteen Years Of A Quasi-Market For Schooling, James Forman Jr.

Georgetown Law Faculty Publications and Other Works

Supporters of public education have long feared that charter schools will threaten the public system, both by 1) creaming off the most advantaged students and 2) undermining political support for the public system. These fears have not been borne out. Blacks are disproportionately in charters, whites are disproportionately in traditional public schools, and Hispanics are fairly evenly distributed between the two. Looking at class measures, poor students are distributed fairly equally between the two types of schools. And turning to other measures of privilege, the evidence does not point strongly in either direction. My conclusions are not without qualification. The …

Author's Response, John H. Jackson

Georgetown Law Faculty Publications and Other Works

It is a privilege for me to have received the attention to my latest book of such a trio of expertise and scholarly balanced policy perspectives from three different disciplines : economics, law, and diplomacy. It is also a privilege and honor for me to receive from each of these three sometimes divergent disciplines a general overall recognition of what I sought to accomplish in this book. I congratulate the reviewers. The book has an intricate logical structure but struggles with huge amounts of empirical information, in a purposefully short work. All three authors have recognized these features, and seem …

Book Review: Social Justice: The Moral Foundations Of Public Health And Health Policy, Robin West

Georgetown Law Faculty Publications and Other Works

This essay is a review of Social Justice: The Moral Foundations of Public Health and Health Policy by Madison Powers & Ruth Faden (2006).

In this pathbreaking book, senior bioethicists Powers and Faden confront foundational issues about health and justice. How much inequality in health can a just society tolerate? In a world filled with inequalities in health and well-being, which inequalities matter most and are the most morally urgent to address? In order to answer these questions, Powers and Faden develop a unique theory of social justice that, while developed for the specific contexts of public health and health …

It Depends On What The Meaning Of "False" Is: Falsity And Misleadingness In Commercial Speech Doctrine, Rebecca Tushnet

Georgetown Law Faculty Publications and Other Works

While scholarship regarding the Supreme Court's noncommercial speech doctrine has often focused on the level of protection for truthful, non-misleading commercial speech, scholars have paid little attention to the exclusion of false or misleading commercial speech from all First Amendment protection. Examining the underpinnings of the false and misleading speech exclusion illuminates the practical difficulties that abolishing the commercial speech doctrine would pose. Through a series of fact patterns in trademark and false advertising cases, this piece demonstrates that defining what is false or misleading is often debatable. If commercial speech were given First Amendment protection, consumer protection and First …

Why The Customer Isn’T Always Right: Producer-Based Limits On Rights Accretion In Trademark, Rebecca Tushnet

Georgetown Law Faculty Publications and Other Works

In this article the author responds to James Gibson’s article Risk Aversion and Rights Accretion in Intellectual Property Law, which offers valuable insights into the extra-judicial dynamics that have contributed to the seemingly unending expansion of copyright and trademark rights over the past few decades. Her response focuses on the trademark side of that expansion. The theoretical basis for granting trademark rights is that, if consumers perceive that a mark or other symbol indicates that a single source is responsible for a product or service—whether through physical production, licensing, sponsorship, or other approval—then the law should give effect to …

Affirmative Inaction, Girardeau A. Spann

Georgetown Law Faculty Publications and Other Works

Perhaps the most exasperating aspect of racial discrimination in the United States is the self-righteous manner in which it is practiced. After a history of facilitating white exploitation of minority interests, the Supreme Court intimated in Grutter v. Bollinger that time was running out for racial minorities to take advantage of the opportunities for equality that the culture has offered in the form of affirmative action. Justice O'Connor's majority opinion seemed to say that in another twenty-five years, the Court would cease to tolerate such special favors for racial minorities, thereby leaving minorities only a limited amount of time remaining …