Digital Commons Network^™

Tracing And Replay Of Real-Time Concurrent Programs In Vxworks, Daxa Keshavji Patel

Computer Science and Engineering Theses - Archive

Real-time concurrent programs are difficult to analyze, debug and test because of the existence of race conditions. In particular, cyclic debugging requires the ability to reproduce a failed execution. That is, when a failure is observed during a test run, it is often necessary to reproduce the test run as an effort to locate the bug that has caused the failure. However because of the variations in thread scheduling and signal latency, a real-time concurrent execution may not be reproduced simply by re-executing the program under test. In this thesis, we describe a language-based framework for tracing and replay of …

Performance Analysis Of The Beacon Period Contraction Mechanism In Wimedia Mac For Uwb, Shenjin Sun

Computer Science and Engineering Theses - Archive

The WiMedia MAC for UWB based WPANs is currently preferred among standards for wireless network since it requires non-infrastructure for ad hoc network, and also supports for Quality of Service (QoS). Without infrastructure, coordination of devices within radio range is achieved by the exchange of beacon frames, which is an overhead in WiMedia MAC, since no data transmission is allowed during Beacon Period (BP). In a dynamic network, devices might leave or join in, so beacon slots will be released or reoccupied with the changing of network. And BP contraction mechanism is aimed at reusing the released beacon slots in …

Freezing-Induced Microstructural Changes Of Collagen Scaffolds, Jeffrey David Miller

Mechanical and Aerospace Engineering Theses - Archive

Understanding the effects of freezing on the functional properties of tissues is critical to cryopreservation of native and artificial tissues, and prognosis after cryotherapies. Although investigations have been performed to correlate macroscopic properties such as mechanical properties with freezing parameters, the effects are typically tissue-type dependent and no physical understanding is available to explain these effects. Since the mechanical and optical properties of a tissue are based on the characteristics of its extracellular matrix (ECM), understanding and quantifying these changes could assist in predicting the response a tissue will have to freezing under different circumstances. In this study, the microstructural …

Spatial Patterns And Determinants Of Industrial Regional Growth In Mexico, 1993-2003: Implications For Regional Planning And Public Policy, Jesus Antonio Trevino

Planning Dissertations - Archive

This research investigates industrial regional growth and its determinants in Mexico from 1993 to 2003. Strategies of local economic development, usually based on industrial promotion, require knowing main determinants of industrial regional growth. The case study shows that there is no variable with a systematically strong effect for all industries which policymakers and planners might directly control. This finding warns us about generic policy designs uncritically based on outcomes from other experiences. Although these results show a complex problem in terms of regional policy, some recommendations for industrial spatial distribution may, however, be derived from this study. For instance, during …

Experimental Investigation Of Shear Capacity Of Precast Reinforced Concrete Box Culverts, Jarrod Clinton Burns

Civil Engineering Theses - Archive

This study presents the experimental investigation of the shear capacity of four precast rinforced concrete box culverts. Each culvert was subjected to a monotomically increasing load through a 20-in x 10-in load plate, designed to simulate a standard HS 20-44 wheel footprint. Each box was instrumented with the following: strain gages, load cell, high-resolution laser sensor, data acquisition hardware and software, and laptop computer. The tests were conducted on 1.22 m x 1.22 m x 1.22 m (4 ft x 4 ft x 4 ft) box culverts, with load being applied at the free spigot end. The location of the …

Developing A Program For Creative Leadership Training And Education Phase I: A Model And Strategies For Implementation, Algene Steele

Creativity and Change Leadership Graduate Student Master's Projects

This project contains the background and process of development for a creative leadership training and education program for personnel and students of Freed-Hardeman University in Henderson, Tennessee, resulting from the merging of two independent initiatives put forth by the author and Dr. Ray Eldridge, Dean of the School of Business, Freed-Hardeman University. The process used to develop the initiative, the strategies applied to build support and those planned to implement the program are included, as well as support materials for the program and an explanation and diagramming of a fully accommodating model of content known as the Freed-Hardeman University Model …

Design Of A One Day Workshop On Intuition, Alexander Von Reumont

Creativity and Change Leadership Graduate Student Master's Projects

Intuition has been basically an untouched field in the domain of creativity research. I therefore wanted to investigate intuition in this study from scratch. I wanted to find out what laymen, as well as experts in the field of creativity knew about intuition, what their perceptions and expectations were, and what they wanted to know and learn about it in the future. The purpose of this study was twofold. First, to find rational explanations for intuition which support my hypothesis that it is a wildly neglected but natural and highly influential part of our intelligence. Second, to develop a one …

Hurricane Prediction: A Century Of Advances, Nan D. Walker, Alaric Haag, Shreekanth Balasubramanian, Robert Leben, Ivor Van Heerden, Paul Kemp, Hassan Mashriqui

Faculty Publications

No abstract provided.

Retaining Information Technology Employees In Higher Education, Mary Holmes

Dissertations

The retention of qualified Information Technology (IT) employees is at an all time low within higher education institutions. IT personnel are essential for higher education institutions to effectively integrate technology into their educational programs. These IT employees contribute to their institution's teaching/learning mission, while simultaneously supporting complex and highly visible administrative operations. Yet, all previous research regarding IT employee retention issues had only been conducted within corporate settings.

To examine factors related to IT employees' retention within public higher education, an internet-based study was sent to IT employees in all four-year public universities throughout Michigan. The survey included questions within …

Phylogenetics Of North American Psoraleeae (Leguminosae): Rates And Dates In A Recent, Rapid Radiation, Ashley N. Egan

Theses and Dissertations

The scientific discipline of phylogenetics involves understanding the diversity of life in the context of history. Technological advances in molecular biology and computational power have created an exponential increase in the number and kind of phylogenetic studies, allowing exploration of all manner of questions concerning the evolutionary history of a group. This dissertation research is focused on phylogenetic theory and applying these methods to the plant tribe Psoraleeae (Leguminosae; Fabaceae) with an emphasis on North American (NAm) members. First, theory of phylogeny estimation is explored in a review chapter focusing on strengths and weaknesses of phylogenetic methodology. Second, methods are …

Advocate 2006/2007 Volume 23 Issue 2, Office Of Development And Alumni Affairs, Usd School Of Law

Advocate

No abstract provided.

Simulation-Based Estimation Of Contingent-Claims Prices, Peter C. B. Phillips, Jun Yu

Research Collection School Of Economics

A new methodology is proposed to estimate theortical prices of financial contingent-claims whose values are dependent on some other underlying financial assets. In the literature the preferred choice of estimator is usually maximum likelihood (ML). ML has strong asymptotic justification but is not necessarily the best method in finite samples. The present paper proposes instead a simulation-based method that improves the finite sample performance of the ML estimator while maintaining its good asymptotic properties. The methods are implemented and evaluated here in the Black-Scholes option pricing model and in the Vasicek bond pricing model, but have wider applicability. Monte Carlo …

Decision Support Systems In Product Development: A Batesian Network Approach For Injection-Molded Products, Jason S. Trahan

Dissertations

Attribute defects cause a majority of the scrap for many manufacturers injection-molding aesthetic parts, yet these defects receive little attention duringproduct development. Methods for preventing attribute defects have been hampered by the inability to quantify complex cause-effect relationships. However, the qualities of a burgeoning branch of knowledge-based systems, called Bayesian networks, have benefited various fields faced with similar circumstances.Bayesian networks have the capability of presenting causal relationships between variables in a graphical structure and quantitatively explaining their effects throughout that structure. These effects can be characterized by probabilities derived from sources, such as equations, historical data, rules-of-thumb or expert knowledge. …

Investigation Of Oxy-Anion Legand Adsorption Onto Surfaces Of Iron Oxide And Bacteria In Groundwater Aquifers, Haile Mengistu

Dissertations

We have measured adsorption of dissolved phosphate onto synthetic hydrous ferric oxide (HFO), dissolved arsenate and chromate onto the cell membrane of a bacterium species, S. putrefaciens as a function of pH, ionic strength, and relative concentrations of the respective oxy-ligands. Our experimental data were used to constrain optimal values for surface complexation reactions involving dissolved oxi-ligands (phosphate, and chromate) and the HFO surface and the cell membrane of S. putrefaciens respectively according to the diffuse layer model.

Our results provide a more accurate fit to experimental measurements over a broader range of pH (3 - 12), ionic strength and …

Divine Intervention: Re-Examining The "Act Of God" Defense In A Post-Katrina World, Joel Eagle

Chicago-Kent Law Review

From the moment of landfall, Hurricane Katrina instantly became synonymous with unprecedented damage, destruction, and loss. The exceptionally intense storm and subsequent flooding in New Orleans and much of the Gulf Coast was quickly deemed one of the worst disasters in United States history. A particularly destructive consequence of Hurricane Katrina has been the environmental effects, in part caused by oil spills and chemical releases from many of the industrial sources concentrated in the Gulf Coast region.

A question that will likely remain in contention for years or even decades to come is who should be liable for the cleanup …

Searching For A Needle In A Haystack: The Constitutionality Of Police Dna Dragnets, Sepideh Esmaili

Chicago-Kent Law Review

DNA dragnets—the mass warrantless DNA testing of individuals whom authorities have neither probable cause nor reasonable suspicion to believe perpetrated a crime, but who merely live or work near a crime scene—have increasingly been used by police departments in a desperate attempt to solve puzzling crimes. The lack of success and the Fourth Amendment constitutional concerns raised by DNA dragnets, however, lead this practice to be suspect. Under the Fourth Amendment, all searches of an individual must be reasonable. The reasonableness of any search typically depends on the government obtaining a warrant prior to the search. While there are well-established …

Mesospheric Gravity Waves Observed Near Equatorial And Low-Middle Latitude Stations: Wave Characteristics And Reverse Ray Tracing Results, C. M. Wrasse, T. Nakamura, H. Takahshi, A. F. Medeiros, Michael J. Taylor, D. Gobi, C. M. Denardini, J. Fechine, R. A. Buriti, A. Salatun, Suratno, E. Achmad, A. G. Admiranto

All Physics Faculty Publications

Gravity wave signatures were extracted from OH airglow observations using all-sky CCD imagers at four different stations: Cachoeira Paulista (CP) (22.7° S, 45° W) and São João do Cariri (7.4° S, 36.5° W), Brazil; Tanjungsari (TJS) (6.9° S, 107.9° E), Indonesia and Shigaraki (34.9° N, 136° E), Japan. The gravity wave parameters are used as an input in a reverse ray tracing model to study the gravity wave vertical propagation trajectory and to estimate the wave source region. Gravity waves observed near the equator showed a shorter period and a larger phase velocity than those waves observed at low-middle latitudes. …

Pages News, Volume 14, No. 3, December 2006, Irka Hajdas, Christoph Kull, Thorsten Kiefer

PAGES

Contents: Editorial: 14C-Chronology -- PAGES calendar -- Inside PAGES -- New on the PAGES bookshelf -- Program News -- The Millennium project: European climate of the last millennium -- Paleoenvironments in south India: Monsoon records from rainfed reservoirs -- Science Highlights: 14C - Chronology -- Cosmogenic isotope 14C: Production and carbon cycle -- Assuring measurement quality: The international 14C laboratory inter-comparison -- IntCal and the future of radiocarbon calibration --- The potential for extending Intcal04 using OIS-3 New Zealand sub-fossil Kauri -- Marine reservoir corrections and the calibration curve -- New approaches to constructing age models:OxCal4 -- 21st century suck-in …

Coupling Of Fluid & Solid Thermal Models To Correct Heat Flux Measurements Taken On Launch Vehicles, Danielle M. Ford

Master's Theses - Daytona Beach

Knowledge of aerothermally induced convective heat transfer and plume induced radiative heat transfer loads is essential to the design of thermal protection systems (TPS) for launch vehicles. These loads are measured via the cylindrical heat flux gauges that are flush mounted with the outer surface of a launch vehicle and are exposed to the in-flight external thermal and velocity boundary layers as well as thermal radiation. Typically, Schmidt-Boelter gauges measure the incident heat flux based on the one-Dimensional Fourier's law. This instrumentation, when surrounded by low-conductivity insulation, has an exposed surface temperature significantly lower than the insulation. A substantial disturbance …

Neural Network Burst Pressure Prediction In Composite Overwrapped Pressure Vessels From Acoustic Emission Data, Seth-Andrew T. Dion

Master's Theses - Daytona Beach

Composites have grown in importance in the aerospace industry where high specific strength is a priority. Weight reduction in space vehicles is critical because of the exorbitant cost associated with placing objects into space. Major weight savings have been obtained by switching from all metal pressure vessels to composite overwrapped pressure vessels (COPVs). Due to the nature of composites, current nondestructive analysis procedures for COPVs are not adequate for assessing structural integrity. As such, new methods must be developed. Presented herein is one such method.

A method for burst pressure prediction using parametric filtering of acoustic emission (AE) data along …

Atomoxetine Treatment In Children And Adolescents With Attention-Deficit Hyperactivity Disorder: What Are The Long-Term Health-Related Quality-Of-Life Outcomes?, Amy R. Perwien, Christopher J. Kratochvil, Douglas E. Faries, Brigette S. Vaughan, Thomas Spencer, Ronald T. Brown

Journal Articles: Psychiatry

OBJECTIVE: Numerous investigations have examined the efficacy of pharmacological treatment for attention-deficit/hyperactivity disorder (ADHD) in children. However, relatively few studies have addressed the impact of treatment on long-term subjective, psychosocial outcomes, such as health-related quality of life (HRQL). This study examines the long-term effects of pharmacological treatment with atomoxetine on HRQL in children and adolescents with ADHD.

METHODS: Participants included 6- to 17-year-old children and adolescents (n = 912) with ADHD enrolled in a 24-month, multicenter, open-label trial of atomoxetine. Outcomes included clinician ratings of ADHD, parent ratings of ADHD, and a widely used measure of HRQL (The Child Health …

J Am Coll Dent 2006 73 4

Journal of the American College of Dentists

The Journal of the American College of Dentists (JACD) publishes scholarly articles, editorials, essays, and reflections addressing the ethical, professional, and social dimensions of dentistry. The Journal serves as a forum for advancing ethics, professionalism, leadership, and excellence within the dental community. By fostering dialogue across disciplines and perspectives, JACD provides readers with insights that encourage ethical, professional practice, lifelong learning, and service to the public, reinforcing dentistry’s commitment to advancing oral healthcare and the common good.

Campus Report, Vol. 34, No. 4, University Of Dayton

Campus Report

Facebook fallout: A study by UD researchers uncovers the different perceptions students and their potential employers have of the popular social networking site.

Convergence, Constraint And The Role Of Gene Expression During Adaptive Radiation: Floral Anthocyanins In Aquilegia, Justen B. Whittall, Claudia Voelckel, Daniel J. Kliebenstein, Scott A. Hodges

Biology

Convergent phenotypes are testament to the role of natural selection in evolution. However, little is known about whether convergence in phenotype extends to convergence at the molecular level. We use the independent losses of floral anthocyanins in columbines (Aquilegia) to determine the degree of molecular convergence in gene expression across the anthocyanin biosynthetic pathway (ABP). Using a phylogeny of the North American Aquilegia clade, we inferred six independent losses of floral anthocyanins. Via semiquantitative reverse transcriptase-polymerase chain reaction (RT-PCR), we monitored developmental and tissue-specific variation in expression of the six major structural ABP loci in three Aquilegia species, two that …

Novel Functions And Physiological Significance Of Ral Interacting Protein - Rlip76 In In Vitro And In Vivo Models, Ewa L. Zajac

Chemistry & Biochemistry Dissertations - Archive

This dissertation is divided into four parts. The first part is an introduction of energy dependent xenobiotic transporters and their relevance in multidrug resistance. However, the main focuse is the description of RLIP76 protein, non-ABC transporter, which it the most efficient transporter of glutathione conjugates and anti-cancer drugs. The second part describes materials and methods that were used in two investigated projects. The third part explains the correlation of RLIP76 with signaling protein POB1 and an involvement of these two proteins in apoptosis of lung cancer cells. The effect of recombinant POB1 and its deletion mutant POB11-512, on transport activity …

Early Belgian Colonial Efforts: The Long And Fateful Shadow Of Leopold I, Robert R. Ansiaux

History Dissertations - Archive

The continuing debate over the causes, effects and future implications of European colonialism and imperialism is perhaps best viewed through a transatlantic lens. The various phases of imperialism from 1415 through 1914 provide ample time and examples of this continuous cultural interchange. The last of these interchanges, forced or otherwise, is that of the New Imperialism of 1860-1914. Discussions of later globalization and economic/cultural imperialism are not covered. That discussion is a different subject perhaps requiring different tools of analysis, especially economic. The impact of this last period reverberates through the current world discussion on rights, obligations, morality and law, …

Geographic Variation In The Morphometrics Of Emydoide Blandingii, Maggie M. Camperlengo

Biology Theses - Archive

Morphometric measurements were taken from museum specimens Emydoidea blandingii. Samples were taken from Michigan, Wisconsin, Illinois, Iowa, Nebraska, New York and Minnesota as well as from Ontario, Canada. Populations of this species have become increasingly fragmented and isolated during the past century due primarily to the urbanization of North America which has included increased road related fatalities and habitat destruction. An examination of physical characteristics was conducted to determine if morphometric analysis could indicate differences among the various populations. Twenty-eight measurements were made and compared to detect physical distinctions between populations. Individuals were then classified geographically based on east (C), …

Acknowledgements, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

Mcnair Scholars Program, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

Metaphysical Poetry: A History And A Legacy, Codi Blackmon

McNair Scholars Research Journal

No abstract provided.