Digital Commons Network^™

Planning And Scheduling For Large-Scaledistributed Systems, Han Yu

Electronic Theses and Dissertations

Many applications require computing resources well beyond those available on any single system. Simulations of atomic and subatomic systems with application to material science, computations related to study of natural sciences, and computer-aided design are examples of applications that can benefit from the resource-rich environment provided by a large collection of autonomous systems interconnected by high-speed networks. To transform such a collection of systems into a user's virtual machine, we have to develop new algorithms for coordination, planning, scheduling, resource discovery, and other functions that can be automated. Then we can develop societal services based upon these algorithms, which hide …

Studies Of Liquid Crystal Response Time, Haiying Wang

Electronic Theses and Dissertations

In this dissertation, the response time issue of the liquid crystal (LC) devices is investigated in meeting the challenges for display and photonic applications. The correlation between the LC director response time and the optical response time is derived theoretically and confirmed experimentally. A major contribution of this thesis is that, based on the small angle approximation, we derive rigorous analytical solutions for correlating the LC director response time to its consequent optical response times (both rise and decay) of a vertical-aligned nematic LC cell. This work successfully fills the gap in the literature of LCD switching dynamics. An important …

Graph-Theoretic Approach To Modeling Propagation And Control Of Network Worms, Zoran Nikoloski

Electronic Theses and Dissertations

In today's network-dependent society, cyber attacks with network worms have become the predominant threat to confidentiality, integrity, and availability of network computing resources. Despite ongoing research efforts, there is still no comprehensive network-security solution aimed at controling large-scale worm propagation. The aim of this work is fivefold: (1) Developing an accurate combinatorial model of worm propagation that can facilitate the analysis of worm control strategies, (2) Building an accurate epidemiological model for the propagation of a worm employing local strategies, (3) Devising distributed architecture and algorithms for detection of worm scanning activities, (4) Designing effective control strategies against the worm, …

The Effect Of Tidal Inlets On Open Coast Storm Surge Hydrographs: A Case Study Of Hurricane Ivan (2004), Michael Salisbury

Electronic Theses and Dissertations

Florida's Department of Transportation requires design storm tide hydrographs for coastal waters surrounding tidal inlets along the coast of Florida. These hydrographs are used as open ocean boundary conditions for local bridge scour models. At present, very little information is available on the effect that tidal inlets have on these open coast storm tide hydrographs. Furthermore, current modeling practice enforces a single design hydrograph along the open coast boundary for bridge scour models. This thesis expands on these concepts and provides a more fundamental understanding on both of these modeling areas. A numerical parameter study is undertaken to elucidate the …

Super High-Speed Miniaturized Permanent Magnet Synchronous Motor, Liping Zheng

Electronic Theses and Dissertations

This dissertation is concerned with the design of permanent magnet synchronous motors (PMSM) to operate at super-high speed with high efficiency. The designed and fabricated PMSM was successfully tested to run upto 210,000 rpm The designed PMSM has 2000 W shaft output power at 200,000 rpm and at the cryogenic temperature of 77 K. The test results showed the motor to have an efficiency reaching above 92%. This achieved efficiency indicated a significant improvement compared to commercial motors with similar ratings. This dissertation first discusses the basic concept of electrical machines. After that, the modeling of PMSM for dynamic simulation …

Adapting The Modified Cam Clay Constitutive Model To The Computational Analysis Of Dense Granular Soils, Jose Arvelo

Electronic Theses and Dissertations

The computational constitutive Modified Cam Clay Model (MCCM) was developed at Cambridge to study the behavior of clays and has been proven to be effective. In this study, this model is extended to the case of dense sands to analyze the accuracy of the stress-strain behavior. This analysis is based on triaxial test data applied to remolded and compacted sand samples under drained conditions. The laboratory triaxial tests were performed by the Florida Department of Transportation to research the permeability effect in sandy soils compacted up to 95% of maximum unit weight at the optimum moisture content. Each soil sample …

Contributions To Automatic Particle Identification In Electron Micrographs: Algorithms, Implementation, And Applications, Vivek Singh

Electronic Theses and Dissertations

Three dimensional reconstruction of large macromolecules like viruses at resolutions below 8 Ã… - 10 Ã… requires a large set of projection images and the particle identification step becomes a bottleneck. Several automatic and semi-automatic particle detection algorithms have been developed along the years. We present a general technique designed to automatically identify the projection images of particles. The method utilizes Markov random field modelling of the projected images and involves a preprocessing of electron micrographs followed by image segmentation and post processing for boxing of the particle projections. Due to the typically extensive computational requirements for extracting hundreds of …

Multizoom Activity Recognition Using Machine Learning, Raymond Smith

Electronic Theses and Dissertations

In this thesis we present a system for detection of events in video. First a multiview approach to automatically detect and track heads and hands in a scene is described. Then, by making use of epipolar, spatial, trajectory, and appearance constraints, objects are labeled consistently across cameras (zooms). Finally, we demonstrate a new machine learning paradigm, TemporalBoost, that can recognize events in video. One aspect of any machine learning algorithm is in the feature set used. The approach taken here is to build a large set of activity features, though TemporalBoost itself is able to work with any feature set …

Vibration Analysis Of Carbon Nanotube Using Continuum Model And Finite Element Model, Hari Subramaniam

Electronic Theses and Dissertations

The main objective of the thesis is to propose the methods of determining vibration behavior of carbon nanotubes (CNTs) using continuum models and finite element models. Secondary objective is to find the effect of van der Waals force on vibration of multiwalled carbon nanotubes . The study of vibration behavior of CNTs is important because of their potential engineering applications such as nano-mechanical resonators and tips of scanning probe instruments where they are subjected to mechanical vibrations. Continuum modeling is based on an elastic beam model. The interlayer van der Waals interactions are represented by Lennard-Jones potential. In finite element …

Rr Interval Estimation From An Ecg Using A Linear Discrete Kalman Filter, Arun Janapala

Electronic Theses and Dissertations

An electrocardiogram (ECG) is used to monitor the activity of the heart. The human heart beats seventy times on an average per minute. The rate at which a human heart beats can exhibit a periodic variation. This is known as heart rate variability (HRV). Heart rate variability is an important measurement that can predict the survival after a heart attack. Studies have shown that reduced HRV predicts sudden death in patients with Myocardial Infarction (MI). The time interval between each beat is called an RR interval, where the heart rate is given by the reciprocal of the RR interval expressed …

Speedes: A Case Study Of Space Operations, Amith Paruchuri

Electronic Theses and Dissertations

This thesis describes the application of parallel simulation techniques to represent the structured functional parallelism present within the Space Shuttle Operations Flow using the Synchronous Parallel Environment for Emulation and Discrete-Event Simulation (SPEEDES), an object-oriented multi-computing architecture. SPEEDES is a unified parallel simulation environment, which allocates events over multiple processors to get simulation speed up. Its optimistic processing capability minimizes simulation lag time behind wall clock time, or multiples of real-time. SPEEDES accommodates an increase in process complexity with additional parallel computing nodes to allow sharing of processing loads. This thesis focuses on the process of translating a model of …

Oceanic Rain Identification Using Multifractal Analysis Of Quikscat Sigma-0, Vasud Ganesh Torsekar

Electronic Theses and Dissertations

The presence of rain over oceans interferes with the measurement of sea surface wind speed and direction from the Sea Winds scatterometer and as a result wind measurements contain biases in rain regions. In past research at the Central Florida Remote Sensing Lab, it has been observed that rain has multi-fractal behavior. In this report we present an algorithm to detect the presence of rain so that rain regions are flagged. The forward and aft views of the horizontal polarization σ0 are used for the extraction of textural information with the help of multi-fractals. A single negated multi-fractal exponent is …

Effects Of Transport Properties And Flame Unsteadiness On Nitrogen Oxides Emissions From Laminar Hydrogen Jet Diffusion Flames, Doyoub Park

Electronic Theses and Dissertations

Experimental studies on the coupled effects of transport properties and unsteady fluid dynamics have been conducted on laminar, acoustically forced, hydrogen jet diffusion flames diluted by argon and helium. The primary purpose of this research is to determine how the fuel Lewis number and the flow unsteadiness play a combined role in maximum flame temperature and affect NOx emission from jet diffusion flame. The fuel Lewis number is varied by increasing/decreasing the mole fraction of diluents in the fuel stream. Therefore, maximum flame temperatures and then NOx emission levels were expected to differ for Ar- and He-diluted flames. In an …

Structural Condition Assessment Of Prestressed Concrete Transit Guideways, Robert Zachary Shmerling

Electronic Theses and Dissertations

Objective condition assessment is essential to make better decisions for safety and serviceability of existing civil infrastructure systems. This study explores the condition of an existing transit guideway system that has been in service for thirty-five years. The structural system is composed of six-span continuous prestressed concrete bridge segments. The overall transit system incorporates a number of continuous bridges which share common design details, geometries, and loading conditions. The original analysis is based on certain simplifying assumptions such as rigid behavior over supports and simplified tendon/concrete/steel plate interaction. The current objective is to conduct a representative study for a more …

Right Turn Split: A New Design To Alleviate Weaving On Arterial Streets, Khaled Shaaban

Electronic Theses and Dissertations

While weaving maneuvers occur on every type of roadway, most studies have focused on freeway maneuvers. Weaving occurring on non-freeway facilities, such as arterial streets, can cause significant operational problems. Arterial streets weaving typically occur when vehicles coming from a side street at an upstream intersection attempt to enter the main street from one side to reach access points on the opposite site at a downstream intersection by crossing one or more lanes. This dissertation investigates the type of problems occurring on arterial streets due to the weaving movements and recommends a new design to alleviate weaving on arterial streets. …

Nevada Department Of Human Resources V. Hibbs: Does Application Of Section 5 Represent A Fundamental Change In The Immunity Abrogation Rules Of "New Federalism," Or Have The Burdens Simply Shifted?, Gabriel R. Macconaill

Dickinson Law Review (1908-2003)

No abstract provided.

Ford Thunderbird, John Alfred Heitmann

History Faculty Publications

Ford, with its introduction of the Thunderbird, became the first car manufacturer to create the market segment for personal luxury cars. The car became the trend-setting automobile of the 1950s and defined personal status during the decade of consumer excess.

Officers, Council, And Committee Chairs, The Delmarva Ornithological Society

Delaware Ornithologist

No abstract provided.

Silent Messages In Negotiations: The Role Of Nonverbal Communication In Cross-Cultural Business Negotiations, Yun Chu, William F. Strong, Jianyu Ma, Walter E. Greene

Communication Faculty Publications

This study specifically explored the perceived importance of the following nonverbal factors in the negotiation process: proxemics (location and negotiation site), physical arrangement (seating and furniture arrangement), and kinesics (eye contact, facial expressions and gestures). The participants are professional business negotiators of different nationalities. The findings show that the negotiators' perception about the three factors and their roles in negotiation are consistent with the nonverbal communication literature.

The Friendship Of The People: Citizen Participation In Environmental Enforcement, Mark Seidenfeld, Janna Satz Nugent

Scholarly Publications

No abstract provided.

Prise En Charge Du Manganisme D’Origine Professionnelle : Consensus D’Un Groupe International D’Experts, Claude Ostiguy, Paul Asselin, Sylvain Malo, Daniel Nadeau, Philippe Dewals

Rapports de recherche scientifique

Click here for the English version of this report

Contexte

Au cours des dernières années, plusieurs travailleurs exposés aux fumées de manganèse ont développé des symptômes évoquant un manganisme d’origine professionnelle. La CSST (la Commission de la santé et de la sécurité du travail), qui est l’organisme d’indemnisation de la province de Québec, faisait face à une situation dans laquelle elle ne disposait pas de techniques normalisées pour la prévention primaire, secondaire et tertiaire du manganisme, menant à la possibilité d’un différend médico-légal, de même qu’à la possibilité d’iniquité pour les travailleurs et les employeurs.

Objectif

Grâce à la définition …

Management Of Occupational Manganism: Consensus Of An Experts' Panel, Claude Ostiguy, Paul Asselin, Sylvain Malo, Daniel Nadeau, Philippe Dewals

Rapports de recherche scientifique

Cliquez ici pour la version française de ce rapport

Contexte

Au cours des dernières années, plusieurs travailleurs exposés aux fumées de manganèse ont développé des symptômes évoquant un manganisme d’origine professionnelle. La CSST (la Commission de la santé et de la sécurité du travail), qui est l’organisme d’indemnisation de la province de Québec, faisait face à une situation dans laquelle elle ne disposait pas de techniques normalisées pour la prévention primaire, secondaire et tertiaire du manganisme, menant à la possibilité d’un différend médico-légal, de même qu’à la possibilité d’iniquité pour les travailleurs et les employeurs.

Objectif

Grâce à la définition …

Réduction Du Bruit Dans Les Centres De La Petite Enfance Par La Réduction Du Temps De Réverbération : Analyses Et Études De Cas, André L'Espérance, Alex Boudreau, François Gariépy, Philippe Bacon

Rapports de recherche scientifique

Click here for the English version of this report

Selon différentes études, les niveaux de bruit dans les locaux et les aires de jeu des Centres de la petite enfance (CPE) sont parfois élevés et peuvent avoir des répercussions sur la santé. La fatigue auditive et le stress sont les deux principaux effets négatifs. De plus, les niveaux de bruit élevés peuvent entraîner de l’irritabilité, un inconfort de communication, une réduction de l’intelligibilité de la parole et même un ralentissement de l’apprentissage verbal chez les enfants.

Plusieurs solutions ont déjà été identifiées et mises en place pour réduire le bruit …

Concert Recording 2005-05-04, Josh Fugit, Billy Mere, Barrett Barker, James Rector, Coley Pitchford, Lyndon Meyer, Whitney Adams, Jeannie Lee, Jessica Sudduth, Lawrence Pereira, Shelby Kifer, Greg Dorst, Sarah Mesko, Ronnamarie Jensen, Elizabeth St. John, Esther Mcleod

Concert Recordings & Programs

Carnival of the animals. Kangaroos ; Aquarium / Camille Saint Saens, arr. Bill Holcombe -- Miniatyer. Intermesso lirico / Erland Von Koch -- Sonate in b for clarinet and piano / Paul Hindemith -- Souvenir de Madrid / Pedro Soler --Sure on this shining night / Samuel Barber -- Spain / David Fetter -- Andante und Polacca fur Horn und Klavier / Friedrich Kuhlau -- Auschwitz, 1987 / Esther McLeod

A Subjective Approach To The Study Of Oligopolistic Party Systems, Riccardo Pelizzo

Research Collection School of Social Sciences

The purpose of this paper is to present a new theory of the cartel party. My argument is straightforward. Assuming that parties are the political analog of firms, that party systems are the political analog of markets, that the shares of the electorate are the political analog of the market shares that firms control, Western European party systems share with oligopolistic markets some structural features. Yet, to know whether Western European party systems resemble oligopolistic markets, we need to know whether Western European party systems are non-competitive political markets exactly in the same way in which oligopolistic markets are not …

Sensitivity To Verb Phrase Grammaticality By Children With Specific Language Impairment, Brenda L. Beverly, Lori A. Swanson

Brenda L. Beverly Publications

Research suggests that typically developing (TD) children and children with specific language impairment (SLI) are sensitive to noun phrase grammaticality (Gerken & McIntosh, 1993; McNamara, Carter, McIntosh, & Gerken, 1998). A verb comprehension task was used to investigate sensitivity to auxiliary is in four contexts – grammatical (Who ispushing?), omitted (Who pushing?), ungrammatical (Who in pushing?), and nonsense (Who id pushing?). Eight preschoolers with SLI (age range = 44 – 58 months) and eight language-matched TD toddlers (22 – 29 months) participated. Data revealed a significant interaction: children with SLI had the …

Examining The Role Of Empathy Training In Anger Management Programs For Young Children, Amy L. Zirkelbach

Dissertations and Theses @ UNI

The purpose of this paper is to examine the role of empathy in anger management programs for young children. Given the growing body of research demonstrating the effectiveness of early intervention, efforts are being made to adapt anger management programs to younger populations. As researchers tackle this challenge, careful attention must be given to the unique developmental needs of this age group. Because many anger management programs involve an empathy training component, it is important to determine whether younger populations can benefit from this training. If children are not able to demonstrate these skills at this age, programs and curriculums …

In The House Of The Mirrors: A Collection Of Short Stories, Adrián Fuentes

Dissertations and Theses @ UNI

"In the House of the Mirrors" is a compilation of short stories that question the concept of reality. These stories, however, do not only question reality but also supernaturalism, myth, and legend. Is there any magic in reality or are these two terms always in opposition with each other and can never coexist? What happens when we die? If the gods die, what happens when they die? Is our fate already predetermined or do we really have free will? These stories insist that there are events in life that we ignore because they do not fall in what we have …

Cameras In Court: A Utilitarian Ethical Approach, Kylie L. Greene

Dissertations and Theses @ UNI

Cameras in Court: A Utilitarian Ethical Approach is a theoretical discussion that establishes ethical guidelines for journalists and judges concerning cameras in court. Using utilitarian and deontological ethics the research will show that the current professional codes for journalists and judges are not sufficient and that a more utilitarian approach is necessary. Although still cameras were allowed in courtrooms in the early 1900s, it was the 1995 trial of football star O.J. Simpson that many say forever changed the way journalists, judges, and the public viewed cameras in court. Today, many judges are restricting camera access in high-profile cases, while …

Remembering September 11, Bob Bushong

ATS Chapel Services

No abstract provided.