Digital Commons Network^™

Opportunistic Transmission Scheduling For Next Generation Wireless Communication Systems With Multimedia Services, Chengzhou Li

Dissertations

The explosive growth of the Internet and the continued dramatic increase for all wireless services are fueling the demand for increased capacity, data rates, and support of different quality of service (QoS) requirements for different classes of services. Since in the current and future wireless communication infrastructures, the performances of the various services are strongly correlated, as the resources are shared among them, dynamic resource allocation methods should be employed. With the demand for high data rate and support of multiple QoS, the transmission scheduling plays a key role in the efficient resource allocation process in wireless systems. The fundamental …

Development Of Micro-Scale And Automated Membrane Extraction Systems For Water Analysis, Xiaoyan Wang

Dissertations

Monitoring of trace level contaminants in water involves the extraction and enrichment of analytes. Over the years several techniques have been developed for this purpose. Currently there is an urgent need for the development of micro-scale extraction techniques that can lead to simple, fast trace analysis. Automated instruments that can be used for continuous, on-line analysis are also important. Membrane extraction can address both these needs, because it can be carried out in a continuous fashion and can also be miniaturized. This research addresses these two aspects of membrane extraction for the next generation of sample preparation.

Micro-Scale Membrane Extraction: …

Energy Efficient Organization And Modeling Of Wireless Sensor Networks, Jin Zhu

Dissertations

With their focus on applications requiring tight coupling with the physical world, as opposed to the personal communication focus of conventional wireless networks, wireless sensor networks pose significantly different design, implementation and deployment challenges. Wireless sensor networks can be used for environmental parameter monitoring, boundary surveillance, target detection and classification, and the facilitation of the decision making process. Multiple sensors provide better monitoring capabilities about parameters that present both spatial and temporal variances, and can deliver valuable inferences about the physical world to the end user.

In this dissertation, the problem of the energy efficient organization and modeling of dynamic …

Optimal Speed Limit For Shared-Use Roadways, Yongqiang Yang

Dissertations

Motor vehicle crashes are a serious social problem in the United States. Each year a large number of motor vehicle crashes occur and many people are killed or injured, resulting in substantial economic costs. To minimize economic costs, it is necessary to determine optimal speed limits on roadways because of the strong relationship among posted speed limit, crash frequency, and crash injury severity.

A comprehensive literature review about the relationship among posted speed limit, crash frequency, and crash injury severity level was conducted. Crash frequency prediction models and crash injury severity models are developed to obtain crash frequency and injury …

Effect Of Heavy Metals On Salt March Biota, Kallaya Suntornvongsagul

Dissertations

Environmental restoration of disturbed, degraded and potentially contaminated wetland sites aims for the persistent and sustainable re-establishment of biological communities and important wetland functions. An ecologically informed restoration strategy presupposes some understanding of these system processes, but also of potential impacts on contaminants in the environment for risk assessment, long-term management, and potential cost-effective mitigative measures. In this study, potential effects of moderate heavy metal contamination in sediments of the urban salt marsh Harrier Meadow, NJ, were evaluated on growth performance of the common salt marsh plant S. patens and associated arbuscular mycorrhizal fungi (AMF) colonizing its roots. Growth performance …

Functionalization, Growth And Applications Of Single Wall Carbon Nanotubes, Yubing Wang

Dissertations

Because of their remarkable structural, mechanical and electrical properties, carbon nanotubes, and especially single wall carbon nanotubes (SWNTs), represent one of the most widely investigated materials today in the emerging field of nanotechnology. The development of oriented growth of SWNTs critical for applications, novel approaches for the creation of functional SWNTs, and applications of both as-prepared and chemically functionalized SWNTs for electrochemically-induced hydrogen storage, in-situ formation of new polymer and ceramic nanocomposites with SWNTs, and the fabrication and study for the first time, to the best of our knowledge, of a SWNT-based biofuel cell and self-powered biosensor, are the thrusts …

A Bayesian Approach To Wireless Location Problems, Ivan Zorych

Dissertations

Several approaches for indoor location estimation in wireless networks are proposed. We explore non-hierarchical and hierarchical Bayesian graphical models that use prior knowledge about physics of signal propagation, as well as different modifications of Bayesian bivariate spline models. The hierarchical Bayesian model that incorporates information about locations of access points achieves accuracy that is similar to other published models and algorithms, but by using prior knowledge, this model drastically reduces the requirement for training data when compared to existing approaches. Proposed Bayesian bivariate spline models for location surpass predictive accuracy of existing methods. It has been shown that different versions …

Studies Of Solar White-Light Flares And Small-Scale Magnetic Structures Observed In The Near Infrared, Yan Xu

Dissertations

Using the most advanced infrared imaging technology as developed by NJIT, detailed study of solar white-light flares and small magnetic structures, such as faculae and pores, are presented in this dissertation. The investigations focus on near-infrared observations at 1.56 μm, which are good proxy of the deepest layer of the solar photosphere.

I made fundamental contributions in two areas of near infrared (NIR) solar physics: (1) the first detection and understanding of white-light flares in the NIR and (2) clearly demonstrated non-existence of "dark faculae". Several high-resolution observations have been carried out at BBSO and National Solar Observatory/Sacramento Peak. The …

Supporting Individual Time Management Through The Capture And Display Of Temporal Structures, Dezhi Wu

Dissertations

This thesis work examines the time management strategies of individuals in an academic institution and gathers information on the complex temporal structures they experience and manage. Its focus is on understanding the relationship between the quality of individual time management and an individual's understanding and use of temporal structures. This work consists of an exploratory field study to gather data on how people use temporal structures with electronic tools. It is followed by a survey that is given to a larger group of respondents in the same subject population examined with the field study. The survey examines the hypotheses developed …

Rna Structure Analysis : Algorithms And Applications, Jianghui Liu

Dissertations

In this doctoral thesis, efficient algorithms for aligning RNA secondary structures and mining unknown RNA motifs are presented. As the major contribution, a structure alignment algorithm, which combines both primary and secondary structure information, can find the optimal alignment between two given structures where one of them could be either a pattern structure of a known motif or a real query structure and the other be a subject structure.

Motivated by widely used algorithms for RNA folding, the proposed algorithm decomposes an RNA secondary structure into a set of atomic structural components that can be further organized in a tree …

Electronic Capture And Analysis Of Fraudulent Behavioral Patterns : An Application To Identity Fraud, Benjamin Ngugi

Dissertations

The objective of this research was to find a transparent and secure solution for mitigating identity fraud and to find the critical factors that determine the solution's acceptance. Identity fraud is identified as a key problem with total losses exceeding fifty two billion dollars (Javelin Strategy and Research 2005). A common denominator in most identity-fraud-prone transactions is the use of a keypad; hence this research focuses on keypad data entry and proposes a biometric solution. Three studies develop, evaluate and investigate the feasibility of this solution.

The first study was done in three stages. Stage one investigated the technical feasibility …

Exploration Of Ideal Body Image Among African-American Women, Shannon Denise Nickens

Dissertations

Body image dissatisfaction is a pervasive problem, most notably among women, that is neither well understood nor well defined. Inconsistent and overly narrow definitions of body image make it difficult to draw conclusions regarding the degree and type of dissatisfaction across cultural and/or various ethnic groups. Thus far, research has largely focused on size, shape, and weight concerns, ignoring physical features that may be salient to women belonging to non-Caucasian ethnic groups. This study explored African-American (AA) preferences for weight, waist-to-hip ratio (WHR), and salient physical appearance attributes, as well as their identification with the ¿thin¿ ideal, racial identity salience, …

When The Past Meets The Present: Economic And Business Development Of Hungary And Russia From Communism To Market, Zinaida Karapetyan

Dissertations

The study analyzes the continuity in economic and business development in Hungary and Russia from command economy to market. It consists of two parts.

The first part presents an overview of historical development of the planned economic system in Russia and Hungary with the emphasis on two issues ¿ how the system came about and what kind of reforms had been introduced prior to its collapse. The first issue is addressed to demonstrate that the communist regime in either country was not simply imposed on it by some ideologically driven group, in the case of Russia, or by the Soviet …

Navigating Cultures And Epistemologies In Science And Technology Education, Kathleen Theresa Kurzk

Dissertations

This investigation focuses on the nexus of science and culture in the lives of marginalized youth in the United States and South Africa. The epistemologies and contextual realities of cross-cultural learner cohorts and their understandings of scientific phenomena are examined. The researcher was a participant observer within the context of the Science, Technology & Culture: Empowering Learners (STC) program, an after-school and school-based collaboration focused upon integrating science, technology and culture. Electronic communication provided a vehicle for dialogue between youth in St. Louis, Missouri, USA and a South African Township. Study findings include documentation of the marginalizing effects of poverty …

How High School Science-Related Experiences Influenced Career Persistence, Andrew Dwight Shaw

Dissertations

The events of 9/11 brought into focus two ongoing trends that were present before this tragedy and have continued since: 1) The United States needs more scientists if it is to ensure its freedoms and maintain its economy. 2) The number of scientists in the ¿pipeline¿ is declining because of the diminished presence of foreign scientists (they are wanted in their own countries), the under-representation of minorities and women, and the reduced numbers of students able and willing to take on the scholastic rigors necessary for a science or engineering degree. Though much has been written about improving science education, …

An Analysis Of Rhythm Systems In The United States: Their Development And Frequency Of Use By Teachers, Students, And Authors; And Relation To Perceived Learning Preferences, Paul Charles Varley

Dissertations

One of the issues facing music educators is the way in which they teach students to read rhythms accurately. Using the current educational philosophy of differentiation, or teaching a student by appealing to their preferred learning style, as a backdrop, the researcher proposed that music educators tend to teach rhythms using a limited number of systems, thereby failing to utilize many of the available systems.

The researcher examined the published rhythm systems dating back to the early nineteenth century, surveyed band students in grades 7-12 concerning their preferences in learning rhythms and their learning styles, surveyed music teachers concerning their …

Alice Parker: American Choral Composer, Arranger, And Educator, Gail H. Fleming

Dissertations

This investigation is an in-depth examination of Alice Parker's philosophy of music in relation to choral teaching, arranging, and composing. The researcher proposes that within the context of multi-cultural American music, Alice Parker's unique approach to music making and how it is manifested within her choral compositions, arrangements, and teaching techniques is a significant and valuable area of study for music educators and students. Further, it is beneficial to administrators and the general public, as well.

Within the literature review, Alice Parker's unique and effective approach to music making is related to the need for a philosophy of music, educational …

Worry, Kristen Tracy

Dissertations

The poems that make up Worry investigate themes of feminine struggle, identity, and survival. They move at a fast pace, and many of the metaphors are drawn from the animal kingdom.

Influence Of Uncorrelated Defects On The Vortex Phase Diagram In Yba2Cu3O7-6 Superconducting System, Lucian M. Undreiu

Dissertations

The goal of our work is to gain more insight into the vortex dynamics in YBa₂Cu₃0_7-8 single crystals with point defects induced by 9MeV proton irradiation. The position of the critical points from the first order melting transition line can be shifted in a controlled manner with the induced disorder. In order to accomplish a comparative study, different crystals and irradiation doses were used. The results were correlated using both electrical transport and ac specific heat measurements. Special attention was given to investigating the nature of the vortex state below the lower critical point o …

Intergenerational Power Exchange Model: Meta-Analysis Of Male Batterers’ Intervention Programs, Suzanne Van Weelde

Dissertations

Domestic violence is an ongoing social problem. Many women have suffered from the abuse of spouses and boyfriends. A number of children have been victims, or witnesses of, this particular form of violence. The consequences of abuse are: preventable crimes, victims and witnesses becoming abusers themselves, escalating health and mental costs. Domestic violence has touched every community within the United States. It is not a social problem that sociological researchers can afford to minimize.

Sociological literature has documented the growth of the social problem of domestic violence. As a result of the awareness of domestic violence as a serious social …

Evaluating The Operative Mechanisms Underlying The High-Probability Request Sequence, Carrie L. Coleman

Dissertations

Failure to comply with requests in educational settings interferes with the learning process. The high-probability request sequence has been demonstrated to be an effective treatment for noncompliance. However, the operative mechanisms underlying this treatment remain unknown. This study sought to further elucidate high-p behavior change mechanisms through the manipulation of reinforcement and response rate variables. The purpose was to determine whether increases in compliance to low-probability requests could be obtained with either the high-p sequence or with the delivery of preferred stimuli on a response-independent basis. Math problems served as high-p and low-p requests, and data were collected on compliance …

Risk Sharing And Consumption Insurance In Poor Urban Economies: Theory And Empirical Evidence From Household Data, Seife Dendir

Dissertations

Households in poor economies often strive to protect consumption from fluctuations in income through various mechanisms. Due to the absence or scarcity of formal insurance, however, they are often forced to rely on informal means to achieve this objective. This dissertation consists of three essays that analyze the nature, performance and instruments of risk sharing and consumption insurance in poor urban areas.

The first essay identifies the peculiar problems poor urban households face in their attempt to pool risk from idiosyncratic income swings, and derives unique results pertaining to the level of insurance and effort. Two specific problems are identified: …

Career Experiences And Career Development Among Chinese American Professional Women: A Qualitative Study, Yi-Ling Linda Kuo-Rice

Dissertations

Only a few research studies have addressed the cultural transitions and career-related issues experienced by Chinese American women. These individuals represent a silent group whose career values, career choices, and vocational needs remain largely unexplored (Yang, 1991).

This qualitative study, using grounded theory methods, explored the career experiences, career development, and career decision-making of nine foreign-bornChinese American professional women from various career fields. The findings from the study are divided into two parts. The first part presents summaries of each study participant's career development, providing a context-rich description of each case. The second part of the findings offers the results …

Aid Effectiveness, Policies And Reform, Elias Kedir Shukralla

Dissertations

The effectiveness of foreign aid in developing countries is one of the most controversial topics in the development literature. In particular, issues relating to the link between aid and growth, and whether aid works better when good policies and reforms are undertaken, and how aid should be allocated have been hotly debated by economists and policy makers. As a matter of fact, developing countries continue to receive large amounts of foreign aid every year, and the controversies surrounding aid also remain strong. This dissertation reexamines the links between aid, growth, policies and economic reforms in aid recipient countries and sheds …

Pyramidal Staff Training: Teaching Play And Manding To Children With Autism And Developmental Disabilities, Koji Takeshima

Dissertations

This study involved pyramidal staff training and the teaching of play and manding to children with autism and developmental disabilities in an early intervention program. The following training components were sequentially introduced to each technician: (a) a written procedure; (b) video modeling; (c) a slide show and checklist, combined with video modeling; and (d) feedback. The trainees improved their skills in teaching play as these training components were introduced, and the children's performance in play and manding subsequently improved. For the skills of teaching play, the core component of the training that resulted in the largest improvement varied across technicians. …

The Relationship Between Counselor-In-Training Personality Traits, Family-Of-Origin Characteristics And Working Alliance, Anthony W. Tatman

Dissertations

Research has revealed that the working alliance between counselors-in-training (CITs) and their clients predict therapeutic outcome (Horvath & Symonds, 1991; Parish & Eagle, 2003). The amount of research is limited, however, concerning CIT traits that facilitate the development of the working alliance (Ackerman & Hilsenroth, 2001; Ligiero & Gelso, 2002; Wampold, 2001). The purpose of the present study was to identify the degree to which CIT personality traits and family-of-origin (FOO) characteristics are associated with working alliance evaluations. This study utilized the 5 domains of personality, measured by the NEO-FFI (Costa & McCrae, 1992), and alexithymia, measured by the TAS-20 …

The Politics Of Neighborhood Governance: Understanding China’S State-Society Relations Through An Examination Of The Residents Committee, Jianfeng Wang

Dissertations

For the nearly three decades of coexistence between economic liberalization and political authoritarianism, China remains as an anomaly to the liberal mantraof our time. This project explores a segment of the China Paradox, the state-society interaction channeled by the Residents Committee. Being the largest urban neighborhood organization, the committee deserves study because of its controversial status interlaid between ordinary residents it claims to represent and the authoritarian state. The committee enters the discourse as a directly congruent example of the same paradox that the whole China displays, when it is endowed with important, yet tension-changed statutory functions ranging from social …

International Financial Integration, Sonila Beliu

Dissertations

During the last two decades, the degree of international financial integration (IFI) has increased substantially. This increased level of IFI has a number of benefits. First, it can lead to more efficient allocation of saving and investment across countries and, therefore, facilitate consumption smoothing. Second, it can enable domestic investors to achieve a higher level of diversification. Third, the industrial sector can benefit from having better access to the world’s capital supply and, eventually an increase in the level of IFI will have a positive impact on countries’ output growth. In all, higher levels of IFI can lead to a …

Analysis Of Group Differences And Predictors Of Hooper Visual Organization Test Scores, Michael R. Devries

Dissertations

The Hooper Visual Organization Test (VOT) is described in the manual as a screening instrument that measures the ability to organize visual stimuli (Hooper, 1983). The VOT is identified as being particularly sensitive to neurological impairment. Studies to determine the criterion and construct validity of the VOT have examined its usefulness in distinguishing between individuals with neurological impairment from those with other disorders. Few studies have included samples from normal, psychiatrically impaired, and neurologically impaired populations in determining the VOT's usefulness in identifying neurologically impaired individuals. Furthermore, as neuropsychology has moved away from the understanding of neurological impairment as a …

Importation And Prisonization Of Corrections Worker’S Attitudes And Behaviors: An Empirical Examination Of Social Distance, Correctional Orientation, And Punitive Behavior Within The Correctional Setting, William J. Hartley

Dissertations

Past research has relied on two theoretical models---importation and prisonization---to explain staff member's attitudes, behaviors, and social distance from offenders in the correctional work environment. Tests of these models have shown partial support for both models. However, missing in the literature has been a clear understanding and examination of how these attitudes and behaviors vary across custody levels within a given correctional facility. The purpose of this study is: (1) to include a more comprehensive test of the prisonization and importation models by including more of the variables utilized in past research; (2) to develop and test a causal model …