Digital Commons Network^™

Practical Localized Waves Generation, Mohamed Ahmed Salem

Dissertations

Since the early works on localized waves (LW), extensive results were published on this important subject, from both the theoretical and the experimental points of view. Nevertheless, those experimental techniques of LW generation suffer from several shortcomings. A major one is that only pulse peaks were accredited. Either the full profile of the generated pulse was not reported, or it was not closely matching the theoretical profile. Additionally, low resolutions of the generated LWs were reported in the acoustic X-Waves. The conductors of the experiment attributed this effect to the limited bandwidth of the excitation elements.

The interest in the …

In-Group / Out-Group Dynamics And Effectiveness In Partially Distributed Teams, Faina Privman

Dissertations

When organizations collaborate they often do so using partially distributed teams (PDTs). In a Partially Distributed Team there exist at least two distinct sub-groups. In addition, at least one of the sub-groups has two or more members that are geographically co-located. Co-located members can meet face to face; chat in the hallway; have lunch together; and otherwise socialize with one another. On the other hand, remote members must rely on technology to communicate and work together. This distinct characteristic of partially distributed teams makes them especially susceptible to the In-Group / Out Group dynamic (Huang and Ocker, 2006). This dynamic …

Electrohydrodynamic Manipulation Of Multiphase Fluids, Sai C. Nudurupati

Dissertations

In microfluidic devices, the fluid can be manipulated either as continuous streams or droplets. The latter is particularly attractive as individual droplets can not only move but also split and fuse, thus offer a greater flexibility in applications such as a laboratory-on- a-chip. In this thesis, a technique is developed that uses an externally applied electric field for manipulating and removing particles trapped on the surface of a drop. The drop is assumed to be immersed in another liquid with which it is immiscible, and the electric field is generated by placing electrodes on the sides of the microdevice. Both …

Accessibility In Metropolitan Transportation Planning : Visualizing A Gis-Based Measure For Collaborative Planning, Aditi Sarkar

Dissertations

Passed by the US Congress in 1995, the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU), requires Metropolitan Planning Organizations (MPOs) to further the trend of collaboration by employing visualization techniques for Transportation Improvement Programs (TIPs). In the first part of this two-part research, three New Jersey MPOs are investigated to understand how accessibility is considered by their organizations, how TIPs are evaluated, and how collaborative planning and visualization techniques are used to evaluate TIPs. In the second part of this study, a small segment of a MPO's jurisdiction is selected to develop a visualization of …

High Resolution Solar Observations From First Principles To Applications, Angelo P. Verdoni

Dissertations

The expression "high-resolution observations" in Solar Physics refers to the spatial, temporal and spectral domains in their entirety. High-resolution observations of solar fine structure are a necessity to answer many of the intriguing questions related to solar activity. However, a researcher building instruments for high-resolution observations has to cope with the fact that these three domains often have diametrically opposed boundary conditions. Many factors have to be considered in the design of a successful instrument. Modern post-focus instruments are more closely linked with the solar telescopes that they serve than in past. In principle, the quest for high-resolution observations already …

Design Development And Evaluation Of Collario, A Group Support System For Collaborative Scenario Creation, Xiang Yao

Dissertations

In the fields of Emergency Management and Business Continuity Planning, scenarios are a widely used tool for planning, training and knowledge sharing purposes. The ability to create and discuss emergency scenarios in virtual teams can lead to many potential applications, such as discussing emergency scenarios by world-wide experts, conducting on-line exercises, and creating Communities of Practices. Existing scenario creation systems, like NxMsel provided by FEMA, allow distributed groups to create scenarios together. However, collaborative support in these systems is generally limited.

This dissertation explores an innovative solution to provide various types of collaboration support around a knowledge structure and uses …

Reduced Order Models For Fluid-Structure Interaction Systems By Mixed Finite Element Formulation, Ye Yang

Dissertations

In this work, mixed finite element formulations are introduced for acoustoelastic fluid- structure interaction (FSI) systems. For acoustic fluid, in addition to displacement- pressure (u/p) mixed formulation, a three-field formulation, namely, displacement-pressure-vorticity moment formulation (u - p -Λ) is employed to eliminate some zero frequencies. This formulation is introduced in order to compute the coupled frequencies without the contamination of nonphysical spurious non-zero frequencies. Furthermore, gravitational forces are introduced to include the coupled sloshing mode. In addition, u/p mixed formulation is the first time employed in solid. The numerical examples will demonstrate that the mixed formulations are capable of predicted …

Carbon Nanotube Electronic Structures As Anti-Corrosion Coatings, Sreeya Sreevatsa

Dissertations

A new concept of corrosion prevention is considered in this study. Diode-like and transistor-like structures have been fabricated and analyzed in the study of ionic flow through the resulting potential barriers. The structures were made of functionalized carbon nanotubes. Carbon nanotubes are known for many remarkable properties among which is being chemically inert. Taking advantage of this property, a study of corrosion of steel was undertaken.

In the first case study, successive layers of functionalized carbon nanotubes were deposited to form p-n junctions on steel substrates. It was demonstrated that the corrosion was indeed impeded by the potential barrier formed …

Dynamics Of School Playground Use In Low-Income Neighborhoods : Four Case Studies From Newark, New Jersey, Caryn Schneider Yaacov

Dissertations

Physical activity during youth contributes to enhanced health and development, and time spent outdoors is a positive correlate of children's physical activity levels. Despite the importance currently attached to building healthy communities, children in the United States from economically disadvantaged urban neighborhoods often lack access to quality open space. In response to insufficient outdoor play options for children in Newark, New Jersey, several existing inner-city elementary school playgrounds have been rebuilt through public-private partnerships involving the municipal government, school district, and nonprofit agencies. This study explores the extent to which neighborhood children use these renovated playgrounds outside of school hours. …

Probing The Complex Magnetic, Electronic And Structural Properties In Correlated Manganese Oxides, Peng Gao

Dissertations

Rare-earth Manganese Oxides (RMnO₃) exhibit two distinct structural phases: the orthorhombic structure and the hexagonal structure. The doped orthorhombic phase exhibits a metal to insulator transition, charge ordering and a strong response of electron transport properties to magnetic fields (colossal magneto-resistance). At low temperatures, this system may also exhibit a finite polarization which couples to external magnetic fields. The hexagonal phase is known to have a large spontaneous polarization at high temperatures which couples to the low temperature magnetic order. These materials are important from the basic point of view of understanding strong electronic correlations and …

Open Source Software Projects' Attractiveness, Activeness, And Efficiency As A Path To Software Quality: An Empirical Evaluation Of Their Relationships And Causes, Carlos D. Santos Jr.

Dissertations

An organizational strategy to develop software has appeared in the market. Organizations release software source code open and hope to attract volunteers to improve their software, forming what we call an open source project. Examples of organizations that have used this strategy include IBM (Eclipse), SAP (Netweaver) and Mozilla (Thunderbird). Moreover, thousands of these projects have been created as a consequence of the growing amount of software source code released by individuals. This expressive phenomenon deserves attention for its sudden appearance, newness and usefulness to public and private organizations. To explain the dynamics of open source projects, this research theoretically …

Retention, Social Promotion, And Dropout Rates In Mississippi, Jennifer Jo Woodruff

Dissertations

There has been much research in the past two decades about the dropout problem in America. Dropout rates have become a focal point for all public schools in the nation largely due to components of the No Child Left Behind Act and the Dropout Prevention Act that associate monetary rewards to schools that raise the graduation completion rates to 90%. The dropout rates for the United States rank the educational system 17th for graduation completion rates among developed countries. Mississippi has repeatedly earned the title of low-ranking among all states in the nation.

Dropping out of high school is followed …

Bridging Functional Genomics And Toxicogenomics Through Dna Microarrays In A Fish Model, Shuzhao Li

Dissertations

In a case study of finding gene expression signatures for environmental stressors in Cyprinodon variegatus, this dissertation examines several important issues of applying DNA microarray technology to fish toxicogenomics. The most relevant disciplines, fish toxicogenomics and computational systems biology are reviewed in Chapter 1. Chapter 2 reviews major aspects of DNA microarray technology.

On DNA microarrays, even for probes that target the same transcript, large variations are seen in the probe signals. These variations are partly dependent and partly independent on probe sequences. Chapter 3 estimates the sequence independent variation by combining experimental and computational approaches. Chapter 4 and …

A Cross-Cultural Study Of Intergenerational Communication In Workplace, Yan Guan

Dissertations

This study investigates intergenerational relationships in organizational settings and uses Communication Accommodation Theory (CAT) to examine the influence of age, power, culture, and self-construal on young workers' perceptions of intergenerational communication. According to CAT, communication is stereotypical due to outgroup bias, people favor their own age or power group more than other age or power groups. CAT research showed that young Asians' perceptions of intergenerational communication may be more negative than their Western counterparts. Self-construal was studied to understand the nature of culture's influence. Research and theory supported nine hypotheses and three research questions.

A study using self-report measure was …

An Assessment Of Democratic Policing In The Turkish National Police: Police Officials' Attitudes Toward Recent Police Reforms, Akin Karatay

Dissertations

This study defines democracy, describes democratic policing, analyzes the development of democratic policing principles in the developing country of Turkey and contends that democracy can be enduring only when the police embody democratic values. As Turkey transforms itself in order to become a member of the European Union, the process has fostered national, institutional, cultural and socioeconomic adaptations, all of which lead towards democracy. This process has influenced the Turkish National Police (TNP) as well. In theory, these efforts towards political democratization, legal reform and the adoption of European Union police policy guidelines should have a positive effect on Turkish …

The Alabama Advanced Placement Initiative: The Roles Of The Principal, Teacher, And Student In Bridging The Racial And Socio-Economic Gap In College Preparatory Curricula, Kimberly Laraine Walker

Dissertations

This research study was designed to determine leadership and instructional behaviors of administrators and teachers who are participants in the Alabama AP Initiative, as well as evaluate the perceptions of the AAPI with regard to student performance. The importance of this research was three-fold. First, this study provided principals, as well as aspiring principals, with statistical research for developing a new AP Program or other advanced curricula. Second, the results of this research provided statistical research for teachers, both experienced and those new to the AP Program, who are developing and/or improving instructional strategies that will become an effective means …

Night Field Anecdote, William Garrett Wright

Dissertations

Night Field Anecdote is an original collection of forty-one poems accompanied by a critical introduction.

Investigating Efforts To Change Educator Attitudes And Teaching Strategies Through Professional Development Focused On The Use Of Backward Design Curriculum And The Principles Of Efficacy: Educator Beliefs And Attitudes, Cynthia R. Allen

Dissertations

A specific assessment for testing readiness skills is lacking for children entering kindergarten. This study investigates the influence of early education programs on school readiness and differences between male and female school readiness screening scores upon students‘ entrance into kindergarten. The study uses 321 school readiness screening scores of students in grades kindergarten through 12th grade from a rural school district with the population of approximately 540 students located in Southwest Missouri. A causal-comparative study was performed on the data compiled from student records. An unpaired t-test using a two-tailed P-value hypothesis test revealed there is a significant difference between …

The Impact Of The Data Team Structure On Collaborative Teams And Student Achievement, Brenda Catherine Rone

Dissertations

The purpose of this study was to determine if implementing a specific collaborative structure would create effective teacher teams that in turn would lead to improved student achievement. An effective team can be viewed as one that uses collaboration to increase its knowledge and improve its practices. The structure that was implemented during this study was the Data Team Process. This process was implemented during the 2007-2008 school year in the Hazelwood School District in St. Louis, Missouri. Three measurement tools were used: the Five Dysfunctions of a Team Survey to assess grade level teacher collaboration, the Hazelwood School District …

Effects Of The A+ Schools Program On Attendance, Dropout Rate, And Student Achievement, Jeffrey L. Hyatt

Dissertations

In this study, the results of Missouri Assessment Program student achievement and average daily attendance of schools designated A+ Schools by the Missouri Department of Elementary and Secondary Education (MDESE) were examined to determine if student achievement and average daily attendance results are higher in eligible A+ Schools. Student Missouri Assessment Program achievement results, dropout rates, and average daily attendance percentages were obtained from randomly selected school district populations. This information was compared to a second subject group of the same population for schools not designated A+ Schools by MDESE. The reporting period data was compiled from the 2007-08 school …

Creative Metacriticism: The Portrayal Of Literary Theory In Contemporary Fiction, Zaydun Ali Al-Shara

Dissertations

Some modern creative writers have shown a talent not only in writing tales, but also in philosophy and theory as they examine questions and problems in fiction-making and the very act of reading. This dissertation examines the role the metafictive novel plays in the development of literary theory and fiction. I explore how writers of this type of novel emerge as creative metacritics who overtly and/or covertly, through their fiction, respond to and critique literary theory. The inquiry examines the reciprocal relationship between the fiction of creative metacritics and important movements in literary theory in the late 20th Century. All …

The Relationship Between Multiple Indicators Of Wellness And Parental Stress In Foster Parents, Sarah Gillingham

Dissertations

No abstract provided.

A Conceptual Integration Analysis Of Multiple Instructional Metaphors, Robert Johnson

Dissertations

The present study was conducted to investigate some of the practical implications of conceptual integration theory for educators. This research was a mixed-methods study exploring how improvements in understanding—learning—(as measured by a selectedresponse assessment) are reflected in changes in learner language (described in terms of conceptual integration patterns). After a pretest with open-response and selected-response prompts, two groups of young adult participants viewed different videos of a slightly different review lesson in genes, genetics, and heredity, the difference lying in two different metaphor conditions: the experimental group was shown a more “metaphorrich” version of the lesson using two classic metaphors …

Mapping The Global Landscape In Women's Diasporic Writing, Martha Addante

Dissertations

As a contribution to the theory of cognitive mapping, the dissertation examines the ways in which contemporary novels by women writers of diasporic literature offer new conceptual maps of the present global space. This study argues there is a need for alternative mapping strategies that locate the female diasporic subject within the new global political economy. Fredric Jameson's theory of cognitive mapping and Arjun Appadurai's model of global flows provide a useful framework for mapping global space, yet each must be filtered through a feminist critique and modified by a feminist politics. Ultimately, the dissertation argues for a feminist theory …

Exploring The Relationship Between Religious Faith, Mental Health Help Seeking Attitudes, And Preferences For Counselor Characteristics Among Black American Churchgoers, Darryl P. Plunkett

Dissertations

Empirical data has shown that Black American churchgoers have generally higher baseline rates of religious involvement than the general U.S. population, as well as higher rates of religious involvement than most Black Americans (Chatters, Taylor & Lincoln. 1999). Researchers have noted the influence of religion on the help seeking attitudes of Black Americans (Abernethy, Houston, Mimms, & Boyd-Franklin, 2006) and have also identified counselor characteristics preferred by Black Americans when seeking help for mental health problems (Atkinson, Furlong, & Poston, 1986). However, Black American churchgoers are rarely identified as the target population in empirical studies and little is known about …

Analytical, Computational And Experimental Studies Of Capillary Flow In Complex Geometries, Yongqing Peng

Dissertations

The dynamic processes of capillary flow in complex geometries have been studied analytically, computationally and experimentally in this research. A general approach for modeling the capillary flow in arbitrary irregular geometries with straight axis of symmetry is proposed. Using this approach, the governing equation to describe the dynamic capillary rising motion in capillaries with nonuniform elliptical cross-section is first derived under the assumptions of parabolic distribution of the axial velocity and constant contact angle. The calculation results for the capillary flow in different tubes with irregular wall show that, in comparison with existing models that have been tested, the present …

From Picture To Word To The World: A Multimodal, Cultural Studies Approach To Teaching Graphic Novels In The English Classroom, Shannon Renee Mortimore

Dissertations

Sequential narratives such as comics, graphic novels and Manga (Japanese-style comics) have long been popular in youth culture. Recent attention has shifted to the potential of utilizing these alternative texts in the secondary classroom, yet very little information for English teachers exists regarding how to engage students in close, careful, and culturally informed analysis of these works. While there is a long tradition of thoughtful analytical teaching about literary texts, when it comes to the study of various media with strong image content, language arts teachers often may not know how to proceed. Indeed, preconceptions about the legitimacy of comics …

Scarred Images: Using Appearance As A Motivator To Reduce Driving Under The Influence Of Alcohol, Mary-Theresa Mcnabb

Dissertations

In response to continued driving under the influence of alcohol (DUI) amongst young adults and increased drinking and driving amongst females, the current study aimed to decrease such risky behavior using threats to appearance as a deterrent. One hundred and thirty-three undergraduates at the University of Southern Mississippi completed a threepart study after sequential assignment to one of three groups, a no-photo group, a crash scene photo group, or a personalized-photo group. Baseline measures were taken concerning participants' alcohol-related behaviors. One week later all groups were given statistical information commonly available in DUI prevention pamphlets together with strategies to avoid …

Computing For Knowledge Management: From Nonaka To Visualisation And Knowledge Maps, Helmut Huber

Dissertations

Management itself is not always clearly understood, however, the confusion can be sorted if the underlying theory is clearly distinguished from its implementations. There also may be a specific role for computing in Knowledge Management. It is suggested that Knowledge Management technologists seek a unique strategic position for Computing in Knowledge Management, for reasons of clarity and differentiation from Information Systems. The effective transfer of knowledge is one of the main themes or core competency in Knowledge Management. This is also one of the areas where Knowledge Management technologists may find the niche for a distinct and unique contribution the …

Photoionization Of Rare Gas Clusters, Huaizhen Zhang

Dissertations

This thesis concentrates on the study of photoionization of van der Waals clusters with different cluster sizes. The goal of the experimental investigation is to understand the electronic structure of van der Waals clusters and the electronic dynamics. These studies are fundamental to understand the interaction between UV-X rays and clusters. The experiments were performed at the Advanced Light Source at Lawrence Berkeley National Laboratory. The experimental method employs angle-resolved time-of-flight photoelectron spectrometry, one of the most powerful methods for probing the electronic structure of atoms, molecules, clusters and solids.

The van der Waals cluster photoionization studies are focused on …