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Speed-Up Collisions In Strong-Field Double Ionization, Stanley L. Haan, J. C. Cully, K. Hoekema

University Faculty Publications and Creative Works

We compare quantum and classical models of double ionization (DI) for aligned-electron helium in strong laser fields, considering specifically the role of recollision processes in which the returning electron travels in the direction of the laser force. Quantum studies show that for the knee region in our model a small but persistent portion of the total DI occurs through these speed-up collisions. We show that classical modeling displays similar collisions and reveals that with-the-force doubly ionizing collisions typically involve two-particle trajectories in which both electrons can be said to have been bound or very nearly bound at the zero of …

On The Historical School Of Jurisprudence, Robert E. Rodes

Journal Articles

Legal theory has tended to treat the Historical School as a poor relation, but it has important contributions to make. Developed in opposition to the one-size-fits-all form of natural law that eventuated in the Code Napoleon, it attributes law to a Volksgeist, the spirit of a people, as developed in the peculiar historical experience of that people. The original German proponents of the school had trouble explaining the reception of Roman law in Germany, but despite the importation of technical elements from without, a people's laws are in fact part of their culture and of their spiritual heritage as these …

2004 Usd Fact Book, University Of San Diego

USD Fact Books (1985- )

No abstract provided.

Microstructure Studies In Surfacant Systems, Vivek Agarwal

Open Access Dissertations

Microstructures in two mixed surfactants systems that show novel transformations as a function of composition and temperature have been explored. Indirect imaging methods like Small Angle Neutron Scattering (SANS) along with direct imaging methods like Cryogenic Transmission Electron Microscopy (Cryo-TEM) and recently developed Freeze Fracture Direct Imaging (FFDD have been used extensively to characterize and identify the changes in the microstructures in the mixed surfactant systems as a function of composition, temperature and external force fields.

As water is added to a solution of an anionic surfactant, AOT (2 ethylhexyl sodium sulfosuccinate) and a zwitterionic surfactant, lecithin (phosphatidylcholine) in isooctane, …

Resilience In Ex-Refugees From Cambodia And Vietnam, Lynne Ee Lin Yong

Open Access Dissertations

The negative impacts of various forms of trauma on the physical and mental health of victims are well documented, including the experiences of the French Indo-Chinese, who suffered a range of traumatic experiences ranging from displacement to torture. However, a sizable percentage of French Indo-Chinese refugees living in the U.S. do not exhibit psychopathology. Very little is known about the Indo-Chinese refugees who are not seeking services and are doing well in their host country. This study focused on resilient Cambodian and Vietnamese ex-refugees, with the goal of identifying resiliency factors and their underlying processes, in order to inform the …

Management Of Flounder Infectious Necrotizing Enteritis (Fine) In Cultured Juvenile Summer Flounder, Eric Joseph Gauger

Open Access Dissertations

Knowledge that can be applied towards the diagnosis and prevention of Flounder Infectious Necrotizing Enteritis in summer flounder ( Paralichthys dentatus), caused by the bacterial pathogen Vibrio harveyi, are presented in this research. Biochemical profiles are insufficient to differentiate V. harveyi from other closely related species. Biochemical profiles can, however, be used in conjunction with 16S ribosomal DNA sequencing to provide a reliable method for identifying V. harveyi. A monitoring program for V. harveyi and other potential bacterial pathogens in cultured juvenile summer flounder found that V. harveyi was the most abundant and commonly found bacterial species in juvenile summer …

Transboundary Impacts Of Fishing Activities Along The Northeast Continental Shelf, Mark Lucas Soboil

Open Access Dissertations

In Manuscript I, I construct a stylized conceptual model to evaluate the international trade of the Atlantic groundfish fishery between the US and Canada. The model incorporates both the biological and economic components of the fishery, and explores the environmental, economic and some welfare implications through trade. First I explore the consequence of each country imposing a different fishery management regime. Second, I incorporate the spatial dynamics of the stock into this framework. Third, I use the conceptual model to discover the effects this may have on international trade. And finally I include the spatial dynamics of the stock into …

Issues Of Gender And Peer Collaboration In A Problem-Solving Computer Activity, Laurie E. Center

Open Access Dissertations

The study investigated student attitude and performance on one problem solving computer activity. Four sections of 61 sixth grade students were randomly assigned to either individual computer instruction or same-sex collaborative pairs for six lessons with the spatial perspectives software, Building Perspectives. Students completed pre and post Computer Attitude Questionnaires (CAQ) and Mental Rotation Tests (MRT) to assess differences in attitude and performance between the instructional environment and/or student gender. Results do not indicate significant differences between the independent and collaborative pairs' environments. Boys, however, significantly outperform girls on both pre and post tests of spatial abilities. Moreover, students significantly …

Revaluing The Literary Naturalist: John Burroughs's Emotive Environmental Aesthetics, Stephen Mark Mercier

Open Access Dissertations

This dissertation widens the circle of environmental aesthetics and ecocriticism by considering the role of the emotive in "appreciation." I demonstrate that emotion is a central feature in the literary naturalism of John Burroughs (1837-1921). Burroughs's model for environmental aesthetics combines narrative knowledge, sensory immersion, and emotional responses. Furthermore, I argue that Burroughs's "sentimental" emotions perform crucial roles in politics and therefore have serious implications for environmental consciousness. The rhetorical strategies inherent in Burroughs's paradigm for environmental aesthetics is essential to contemporary efficacious environmental discourse. This dissertation reclaims the importance of emotional affiliation with creatures, particularly birds, and their habitats. …

New Results For Z-Cyclic Generalized Whist Tournaments And Z-Cyclic Generalized Whist Frames, Brian J. Travers

Open Access Dissertations

Mathematicians began studying the generalized whist tournament in the late 1990's. As with traditional whist tournaments (that is, whist tournaments with 4 players per game), many specializations can be examined. In this study, such specializations as Z-cyclic generalized whist tournaments, directed generalized whist tournaments, and generalized whist tournaments possessing the Moore property are considered. Additionally, several new infinite families of Z-cyclic generalized whist tournaments are established for the cases (t, k) = (2, 6), (2, 8) and (4, 8).

Preschool Teachers' Sense Of Teaching Efficacy: Scale Development And Correlates, Leah Alison Whynacht

Open Access Dissertations

The current study developed a scale to measure preschool educators' sense of teaching efficacy and then used the scale to explore relationships between efficacy scores and program and teacher variables. Participants were preschool educators from eighteen states and one country outside of the US (n = 131). A 121-item scale was used in data collection. A series of Principal Component Analyses with Varimax rotation resulted in a 36-item scale with factor loadings ranging from .82 to .58 (Cronbach's alpha = .97). The scale was comprised of the following four factors: Efficacy for Working With Children With Varying Abilities and Needs, …

Cracks In The Foundation: The New Internet Legislation's Hidden Threat To Privacy And Commerce, Joshua Fairfield

Articles by Maurer Faculty

Scholarship to date has focused on the legal significance of the novelty of the Internet. This scholarship does not describe or predict actual Internet legislation. Instead of asking whether the Internet is so new as to merit new law, legislators and academics should re-evaluate the role of government in orchestrating collective action and change the relative weight of enforcement, deterrence, and incentives in Internet regulations.

A perfect example of the need for this new approach is the recent CANSPAM Act of 2003, which was intended to protect personal privacy and legitimate businesses. However, the law threatens both of these interests, …

The Effects Of Goal Contingencies On The Writing Frequency Of Undergraduates Enrolled In A Learning Strategies Course., Bridget Joy Hayes Russell

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examined the effect of goal contingencies on writing frequency. Sixty participants were divided into three conditions: individual goal, group goal, or control. Each week, students participated in a three-minute free-write. Those in the individual goal condition earned 10 bonus points when writing frequency goals were achieved. Those in the group goal condition earned 10 bonus points when the group writing frequency goals were achieved. The control did not receive bonus points contingent on writing frequency. Results indicated that the control and individual goal contingencies conditions wrote greater numbers of words than the group goal contingencies condition. Further, the …

Neodymium:Yag Laser Resonator Chip Design, Optical Characterization And Validation., Narasimha Rao Ayyalasomayajula

Graduate Theses, Dissertations, and Problem Reports (ETD)

Nd:YAG lasers are the most common solid state lasers and are found in many different optical configurations. Effective use of these lasers in remote, in-situ sensing and other applications requires compact size and efficient operation. This project targets the simplification and reduction of the size of these lasers by shaping the active media into a retro-reflecting slab and pumping it with an AlGaAs diode laser at 808nm. The Nd:YAG slab laser was reduced to a rectangular chip component of dimensions 10x12x2mm. The laser was constructed, tested and shown to successfully lase at 1064nm.The slab laser was operated in a pulsed …

Mems Parallel-Plate Electrostatic Actuator: Modeling, Simulation And Characterization., Raghuveer R. Medipalli

Graduate Theses, Dissertations, and Problem Reports (ETD)

Microelectromechanical systems (MEMS) are electrical and mechanical components scaled down to the micrometer scale and integrated on a common substrate. These devices can be batch fabricated and are capable of functioning individually as well as in arrays. With the growing applications of MEMS in safety critical applications, there is an absolute need for their increased reliability. In order to study and improve the reliability of MEMS as well as enable the prediction of faults, a thorough knowledge of the dynamic behavior of these microstructures is required. Prediction of the dynamic behavior of the microstructures is a challenging task and requires …

A Coalbed Methane Simulator Designed For The Independent Producers., Jalal Jalali

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study is to build a PC-Windows based model for two-phase onedimension water & gas system based on the formulation of the model developed by King and Ertekin in 1985. This model is written in Visual Basic 6.0. The advantage of this model over the King and Ertekin’s model is the ability of running the model on personal computers, graphical abilities for input and output, and solving the matrices using an internal solver instead of using a commercial solver. The advantage of this model over other existing models is its ease of to use and being inexpensive …

An Evaluation Of Statewide Truck Forecasting Methods., Andrew J. Rebovich

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research evaluates the theory and practice of current truck forecasting methodologies. The theoretical workings of several model classes are evaluated according to their accuracy, applicability, data requirements, costs, and other factors. A foundation of literature review is conducted to assess the state of the art and practice of classical forecasting methods that may be applied to truck volumes. These include facility traffic flow factoring methods (trend analysis); commodity-based origin-destination trip table factoring methods; truck trip tables within overall passenger flow models; commodity-based four-step forecasting models; and economic activity models. A survey of best practices for state DOT’s is then …

A Simulated Annealing Approach For Flexible Flowshop Scheduling To Maximize Flexibility., Alireza Shieh

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research addresses the multiple stage flexible flow shop with buffer limitation in order to maximize the sum of machines free time at the end of the process within the minimum makespan (FFs (Pm1, Pm2, ..., Pms)/block/ FL max ). Various approaches were used to obtain good solutions for the problem and an analysis was preformed to evaluate the quality obtained with each approach. An exact algorithm with two separate phases was developed using mixed integer programming. In the first phase, C max is minimized, then in the second phase, the machines free time is maximized. This model had a …

A Simple Two-Dimensional Boundary Element Program For Estimating Multiple Seam Interaction., Olayemi Olumide Akinkugbe

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this thesis, the need for a fast and easy to use numerical analysis program for calculating multiple seam interactions is established. To fulfill this, a simplified twodimensional (2D) laminated overburden model was mathematically developed. Also the utility of the 2D laminated model for modeling complex multiple-seam interaction was further enhanced by its ability to calculate the pillar safety factors and multiple-seam induced subsidence and strain. The 2D laminated overburden model is then implemented into a displacementdiscontinuity program called LaM2D. The LaM2D program can be used to calculate seam convergence, vertical stress, multiple seam stress, pillar safety factors, subsidence and …

A Feasibility Study On Modeling And Prediction Of Production Behavior In Naturally Fractured Shale Reservoirs., Boyd T. Huls

Graduate Theses, Dissertations, and Problem Reports (ETD)

The Objective of this study is to demonstrate the feasibility of predicting production characteristics in a Devonian Shale reservoir. This paper discusses the use of a multidimensional, equation of state compositional simulator to develop a prototypical anisotropic shale reservoir. The production data from a group of single well simulations is used to train an Artificial Neural Network to generate production indicators for a well location based on geopositional parameters. This study was conducted to ascertain if an Artificial Neural Network could be adapted to the random uncertainty in naturally fractured shale reservoirs and whether this approach could further the understanding …

The Impact Of A Social Skills Intervention On The Development Of Resiliency In Preschool Children., Tamala L. Lowther

Graduate Theses, Dissertations, and Problem Reports (ETD)

Children need to learn appropriate behavior in their early years. Educators of young children have been given the job of importing very important social competency skills, such as coping, problem solving, cooperation, and self-control skills. Interventions designed to meet the developmental level and individual needs of the children enrolled in a preschool should build factors that will lead to increased social skills and resiliency. This research involved implementing social skill prevention in a preschool classroom in a non-profit childcare center in rural West Virginia. The research examined the effectiveness of the Devereux Early Childhood Assessment (DECA), in increasing protective factors …

A Dual-Stage Approach To Dental Image Registration., Zainab Millwala

Graduate Theses, Dissertations, and Problem Reports (ETD)

In the development of Automated Dental Identification System (ADIS), we focus on registration to align the subject dental regions of interest with respective reference regions. With the goal to achieve high performance for dental image registration, a dualstage approach is proposed which is based on the hypotheses generation-verification paradigm. The registration of the dental regions of interest is the basis for hypotheses generation. The hypotheses generated by using a fast method are verified to retrieve the candidate parameter sets to give accurate alignment of the regions. The statistical distributions of local geometric properties of image contours constitute the essential concept …

Developing Uv Photodetector And Ohmic Contact Techniques On Gallium Nitride., Lavanya Turlapati

Graduate Theses, Dissertations, and Problem Reports (ETD)

Group III nitride wide bandgap semiconductors have recently attracted considerable interest due to their applications for optical devices operating in the blue and ultraviolet (UV) wavelength regions. These materials were also found to be suitable for operation at high power levels, high temperatures and harsh environments. Some applications of UV photodetectors include chemical and biological analysis, flame detection, and optical communications. This project is based on designing AlGaN based quantum well UV photodetector. It has been determined that the presence of multiple quantum wells in the active region improves the device responsivity. The device performance depends on many factors that …

A Parametric Study Of In-Line Filter Holders., Glen A. Wilt

Graduate Theses, Dissertations, and Problem Reports (ETD)

With modern diesel engines producing smaller and lighter particulate mass output, the performance of in-line filtering, used to determine emissions of particulate matter (PM), has become less understood. Several factors including filter characteristics, filter holder geometry, exhaust dilution, filter face temperature, and secondary dilution characteristics need to be investigated. This study investigates factors influenced by filter holder geometry. In the past, many loosely designed filter holders were applied to emissions testing. Recently, 40 CFR Part 1065 recommended a standard filter holder design to be used in all emissions tests. However, it is not known if this design is optimal. To …

Multiterminal Relay Networks: Performance Bounds, Protocol Design, And Channel Coding Strategies., Bin Zhao

Graduate Theses, Dissertations, and Problem Reports (ETD)

The combination of silicon scaling and energy-efficient multi-terminal packet radio technology will soon allow low power devices to be embedded virtually everywhere, enabling a wide range of revolutionary applications that will radically change the way that people and devices interact with their environments. Given current trends in the advancement of technology, to engineer useful embedded wireless networks with long lifetimes and massive scale required for many applications, new analytical tools and approaches to protocol design that reflect recent perspectives on wireless networking are necessary. The major objective of this dissertation is to characterize the fundamental performance bounds and devise an …

A Spatial-Temporal Optimization Approach To Watershed Management: Amd Treatment In The Cheat River Watershed, West Virginia., Xiaobing Zhao

Graduate Theses, Dissertations, and Problem Reports (ETD)

Most water management studies concentrate on the inter-temporal allocation problem or, more recently, spatial dynamics—but not both. While early spatial-temporal studies focused on the allocation of water quantity, this paper presents an approach to water quality analysis that incorporates both spatial and temporal dynamics in a watershed framework. The model developed is an explicit economic watershed optimization model built upon an underlying water quality model where pollution loads are driven by pollution sources and alternative control strategies. It reflects the spatial aspects of pollution loads and treatment and the way the system reacts over time to management options and natural …

The Influence Of Legal Language Upon Supreme Court Voting In Civil Liberties Cases., Sean Wilson

Graduate Theses, Dissertations, and Problem Reports (ETD)

Scholars such as Jeffrey Segal and Harold Spaeth contend that U.S. Supreme Court decisions are based primarily upon the ideological beliefs of the justices. However, in this work I show that this conclusion is exaggerated. The aggregation of votes into a summary statistic (the percent liberal rating) and its use by Segal and Spaeth in a regression having only 21 cases creates misleading results. The truth is that political ideology is a fluctuating influence upon the Court. In some areas of civil liberties voting, ideology is a poor explanation of how cases are decided (e.g., core political speech). But in …

Guided Model Checking With A Bayesian Meta-Heuristic, Michael D. Jones, Peter Lamborn, Kevin Seppi

Faculty Publications

This paper presents a formal verification algorithm for finding errors in models of complex concurrent systems. The algorithm improves explicit guided model checking by applying the Empirical Bayes method to revise heuristic estimates of the distance from a given state to an error state. Guided search using the revised estimates finds errors with less search effort than the original estimates.

The Hypothetical Opinion In Grutter V. Bollinger From The Perspective Of The Road Not Taken In Brown V. Board Of Education, Kevin D. Brown

Articles by Maurer Faculty

No abstract provided.

Of Platonic Guardians, Trust, And Equality: A Comment On Hasen's Minimalist Approach To The Law Of Elections, Luis Fuentes-Rohwer

Articles by Maurer Faculty

No abstract provided.