Digital Commons Network^™

Water Quality Trends For Section 319 Priority Watersheds In Northwest Arkansas, 1997-2010, Bryan William Bailey

Graduate Theses and Dissertations

Northwest Arkansas contains two Section 319 Priority Watersheds that the Arkansas Natural Resources Commission (ANRC) has identified as being impacted by point and nonpoint sources of pollution (i.e., phosphorus, nitrogen, and sediment), and the Arkansas Water Resources Center (AWRC) has monitored the water quality at several sites within these watersheds. Water-quality data has been collected over the last decade within the Illinois River Watershed (HUC #11110103) and the Upper White River Basin (Beaver Reservoir HUC# 11010001), each watershed containing three sampling sites. The Illinois River Watershed sites are located on the Illinois River, Osage Creek, and Ballard Creek, and the …

Palestinian Film: Hyperreality, Narrative, And Ideology, Sarah Frances Hudson

Graduate Theses and Dissertations

Both sides of the Israeli-Palestinian conflict have developed diametrically opposed national narratives and identities that are both predicated on the concept of victimization. These narratives have developed into simulacral narratives as the result of the nature of their development. This paper deals with the Palestinian simulacral narrative which bolsters societal values, particularly the value of victimhood, that are crucial to coping with the prolonged conflict. The Western media, at any given moment during the conflict, has either accepted the concept of Palestinian's as victims of the conflict and the Palestinian simulacral narrative, or rejected it. The media then produces a …

Evaluating The International Criminal Court: A Comparative Analysis Of Darfur, Sudan, And The Democratic Republic Of The Congo, Mirisa Hasfaria

Graduate Theses and Dissertations

This thesis examines the effectiveness of the International Criminal Court (ICC) in holding individuals accountable for grave breaches of crimes against peace, war crimes, crimes against humanity, and genocide. I argue that if we measure effectiveness in terms of the ability to set agenda and to publicize, the ICC accomplishes much. My thesis to shows that, as a key part of the international agenda on human rights compliance, the ICC derives its effectiveness from the various naming and shaming campaigns by national governments and non-governmental actors (NGOs).

I draw on the cases of Darfur, Sudan and the Democratic Republic of …

Inventory Models For Intermittent Highly Variable Demand And Policy Parameter Adjustments To Meet Desired Service Level Requirements, Yasin Unlu

Graduate Theses and Dissertations

This dissertation consists of three assays. The first assay examines the robustness of lead time demand models for the continuous review (r;Q) inventory policy. A number of classic distributions as well as distribution selection rules are examined under a wide variety of demand conditions. First, the models are compared to each other by assuming a known demand process and evaluating the errors associated with using a different model. Then, the models are examined using a large sample of simulated demand conditions. Approximation results of inventory performance measures - ready, rate excepted number of backorders and on-hand inventory levels are reported. …

Determination Of Poultry Litter's Nitrogen-Fertilizer Value For Winter Wheat Production, Brett Lee Gordon

Graduate Theses and Dissertations

Nitrogen (N) availability in poultry litter (PL) applied in the fall as a nutrient source for winter wheat (Triticum aestivum L.) has not been adequately characterized. Our objective was to determine a potentially available N (PAN) coefficient based on the inorganic-N fertilizer equivalence (FEQ) of fall-applied PL to winter wheat via field and laboratory research. Wheat grown at six site-years received 0, 84 and 168 kg N ha-1 as PL applied preplant and/or at-planting. The FEQ of PL-N was based on growth and yield responses of wheat fertilized with 22 to 191 kg N ha-1 applied in late winter as …

Simulations Of Pulse Signals With X-Parameters, Nick K.H. Huang, Lijun Jiang

Electrical and Computer Engineering Faculty Research & Creative Works

Nonlinearity is becoming increasingly important to IC technologies. From the PHD formalism, X-parameter models provide an accurate frequency-domain method under large-signal operating points to characterize their nonlinear behaviors. In this work, X-parameter models are investigated to handle time-domain pulse signals which is critical to IC signal integrity but was not studied before. Two representative circuits, an analog LNA and a digital CMOS buffer, were employed to characterize the X-parameter performance. The results obtained in this paper provide the first hand data for pulse signal responses of X-parameters in signal integrity modelings. © 2011 IEEE.

Compact Metallic Rfid Tag Antennas With A Loop-Fed Method, Peng H. Yang, Yan Li, Lijun Jiang, W. C. Chew, Terry Tao Ye

Electrical and Computer Engineering Faculty Research & Creative Works

Several compact, low profile and metal-attachable RFID tag antennas with a loop-fed method are proposed for UHF RFID systems. The structure of the proposed antennas comprise of two parts: (1) The radiator part consists of two shorted patches, which can be treated as two quarter-wave patch antennas or a cavity. (2) A small loop printed on the paper serves as the feeding structure. The small loop provides the needed inductance for the tag and is connected to the RFID chip. The input impedance of the antenna can be easily adjusted by changing loop dimensions. The antenna has the compact size …

Work In Progress - Virtual Facilitation And Procedural Knowledge Education, Ray Luechtefeld, Steve Eugene Watkins

Electrical and Computer Engineering Faculty Research & Creative Works

Engineering students acquire both conceptual and procedural knowledge as part of their education. While conceptual knowledge, such as understanding why certain design practices are required or having knowledge of the general principles of engineering development, is essential, procedural knowledge to enact specific engineering practices is also needed. This kind of knowledge, such as balancing chemical equations, solving calculus problems, or finding Thevenin-Norton equivalents, is usually taught through rote problem solving, sometimes with the guidance of teaching assistants or aid from the instructor if students find themselves "stuck". However, a Virtual Facilitator, designed to help students develop team skills, can also …

Environmental Influences On Juvenile Fish Abundances In A River-Dominated Coastal System, Laure Carassou, Brian Dzwonkowski, Frank J. Hernandez, Jr., Sean P. Powers, William M. Graham, Kyeong Park, John Mareska

University Faculty and Staff Publications

We investigated the influence of climatic and environmental factors on variations in juvenile abundances of marine fishes in a river-dominated coastal system of the north-central Gulf of Mexico, where an elevated primary productivity sustains fisheries of high economic importance. Fish were collected monthly with an otter trawl at three stations near Mobile Bay from 1982 to 2007. Fish sizes were used to isolate juvenile stages within the data set, and monthly patterns in juvenile fish abundance and size were then used to identify seasonal peaks for each species. The average numbers of juvenile fish collected during these seasonal peaks in …

Optofluidic Glucose Sensor Utilizing An Epoxy-Based, Transparent Dry Film Resist, Zhan Gao, Sijia Gong, Chang Soo Kim, David B. Henthorn

Electrical and Computer Engineering Faculty Research & Creative Works

An enzymatic, fluorescent glucose sensor was constructed with a novel epoxy-Based, optically transparent dry film resist (PerMX 3000 series, DuPont). This material was utilized as the main active material for fluidic structure and optical interrogation. This sensor was based on the enzymatic reaction of glucose oxidase (GOD) and utilized a ruthenium complex fluorophore as the reporting agent. Both the oxygen-sensitive ruthenium complex and GOD were incorporated into poly (ethylene glycol) (PEG)-Based hydrogel materials, which were lithographically patterned and embedded inside the PerMX fluidic channel after wafer-bonding process. the optofluidic sensing platform with this embedded sensing elements exhibited a wide dynamic …

December 1, 2011, The Daily Mississippian

Daily Mississippian (all digitized issues)

No abstract provided.

Distribution Lmp-Based Economic Operation For Future Smart Grid, Fanjun Meng, Badrul H. Chowdhury

Electrical and Computer Engineering Faculty Research & Creative Works

A new methodology for calculating the distribution locational marginal prices (D-LMP) with distributed multi-agent paradigm is presented. the proposed D-LMP employs an optimal power flow methodology to evaluate the marginal energy component, especially for renewable generations, as well as the marginal congestion and loss components, which are critical for the valuation and settlement purposes. It is also illustrated that the D-LMP can be used as pricing signal to achieve maximum system social surplus and encourage distributed renewable energy penetration in distribution system. © 2011 IEEE.

December 1, 2011 Grove Edition, The Daily Mississippian

Daily Mississippian (all digitized issues)

No abstract provided.

Linear Precoding For Mimo Multiple Access Channels With Discrete-Constellation Inputs, Mingxi Wang, Weiliang Zeng, Chengshan Xiao

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, we study linear precoding for multiple-input multiple-output (MIMO) multiple access channels (MAC) with discrete-constellation inputs. We derive the constellation-constrained capacity region for the MIMO MAC with an arbitrary number of users. Due to the non-concavity of the objective function, we obtain the necessary conditions for the weighted sum rate (WSR) maximization problem through Karush-Kuhn-Tucker (KKT) analysis. to find the optimal precoding matrices, we propose an iterative algorithm utilizing alternating optimization strategy and gradient descent update. Numerical results show that when inputs are digital modulated signals and the signal-to-noise ratio (SNR) is in the medium range, our proposed …

On The Preconditioner Of Conjugate Gradient Method A Power Grid Simulation Perspective, Chung Han Chou, Nien Yu Tsai, Hao Yu, Che Rung Lee, Yiyu Shi, Shih Chieh Chang

Electrical and Computer Engineering Faculty Research & Creative Works

Preconditioned Conjugate Gradient (PCG) method has been demonstrated to be effective in solving large-scale linear systems for sparse and symmetric positive definite matrices. One critical problem in PCG is to design a good preconditioner, which can significantly reduce the runtime while keeping memory usage efficient. Universal preconditioners are simple and easy to construct, but their effectiveness is highly problem dependent. on the other hand, domain-specific preconditioners that explore the underlying physical meaning of the matrices usually work better but are difficult to design. in this paper, we study the problem in the context of power grid simulation, and develop a …

Language Learning And Study Abroad: A Critical Reading Of The Research (Review), Elizabeth M. Kissling

Latin American, Latino and Iberian Studies Faculty Publications

Kinginger’s interpretation of the research represents an endorsement of the great potential of study abroad, balanced with several limitations and caveats. Kinginger argues that while study abroad generally results in increased proficiency and oral fluency, slightly superior to gains resulting from at-home formal study, one should note the design flaws of many studies such as lack of a true control group as well as reliance on monologic, situation-less tasks to measure language gains, even in the areas of discursive, pragmatic, and sociocultural competencies. Kinginger also notes that opportunities for learning language and cultural through interactions with native speakers can be …

In Context, Kate Felzien

College of Graduate Studies: Theses & Dissertations

The present thesis seeks to show the influences to my artwork and describe the body of work found in my thesis exhibition, In Context. The role of family and childhood are discussed and related to the work. The feminist writers bell hooks, Jane Tompkins, and Hélène Cixous are cited as influential to the initial exploration of my content. Artists discussed include Louise Bourgeois, Kiki Smith, Annette Messager, and Robert Rauschenberg. It is further shown how poetry and prose evolve as the catalyst for content for my work and how this enforces my belief that only through examining the personal can …

Fear And Fascination: A Study Of Thomas Hardy And The New Woman, Anita Sandlin

College of Graduate Studies: Theses & Dissertations

The tragic outcomes of most of his fictional heroines have led many to accuse Thomas Hardy of being a misogynist, harshly punishing women for their open defiance of Victorian social expectations. However, by writing about sexually-charged issues at a time when subjects such as premarital sex, rape, illegitimate children, adultery, and divorce were taboo, Hardy challenged his readers to consider the destructive power caused by hypocrisy and double standards, making many consider him to be among the first feminists. These conflicting perspectives reflect the internal ambiguities of a gifted man torn between wanting to maintain the conservative comfort of the …

Te Sequor: A Study Of Pope's Observations On The Iliad Of Homer, Drew Nathaniel Keane

College of Graduate Studies: Theses & Dissertations

Although has been written on Pope's translation of the Iliad, little has been written directly on his commentary, which comprise more than half of Pope's work. This study seeks to correct this neglect and argues that Pope's commentary is a vital part of his Iliad. I examine Pope's place among English and French poets and commentators, the epic tradition, and Pope's understanding of the commentator's role.

Why Do Parents Choose To Send Their Children To Private Schools?, Ava M. Davis

College of Graduate Studies: Theses & Dissertations

Private schools were the original educational entities in the United States and have continued playing a prominent role in educating America's youth. The number of private schools has increased over the last decade while the number of private school students has remained stable at approximately nine percent of school-aged children. The reasons for choosing a private school are just as varied as the types of private schools available. Thus, the purpose of this study was to examine the reasons parents give for choosing a private school education for their children. A basic interpretive qualitative study was used to discover and …

Instructional Coaching In Elementary Schools: Perceptions Of Principals, Instructional Coaches, And Teachers, Latoya Doby-Holmes

College of Graduate Studies: Theses & Dissertations

The political climate surrounding academic achievement and teacher accountability is more demanding than ever before. Administrators might be able to improve teacher quality and address teacher accountability with the use of instructional coaching. It is important for all stakeholders to have data on the effectiveness of instructional coaches to enhance teacher performance and student achievement. The purpose of this study was to examine the effectiveness of instructional coaches in terms of student achievement through the perceptions of principals, instructional coaches, and teachers in Georgia elementary schools. A phenomenological research approach was designed for this purpose. In order to triangulate data, …

The Perceptions Of Teachers In A Rural South Georgia County Regarding Merit Pay Based On Student Achievement, Renee M. Sasser

College of Graduate Studies: Theses & Dissertations

The study explored the perceptions of teachers in a rural south Georgia county regarding merit pay based on student achievement. The study examined 205 teachers' personal and professional demographics and perceptions of the use of student achievement in awarding merit pay. The study employed a descriptive, survey approach to address the research questions. A self-designed survey questionnaire was developed to explore teachers' perceptions of merit pay and included a quantitative orientation. Findings indicated that the majority of the teachers who responded to the survey worked at the middle school level, were greater than 50 years old, and had between 0-9 …

Overcoming The Odds: An Exploration Of Resilience Strategies Used By Female Superintendents In School Districts In Georgia, Kathy H. Simmons

College of Graduate Studies: Theses & Dissertations

The purpose of this study was to explore the experiences in the professional lives of female superintendents in Georgia to better understand the role of resilience when faced with adversity. The researcher utilized a mixed method design to determine the strategies employed by female superintendents to successfully overcome adversity and become more resilient. The experiences of female superintendents and strategies utilized in the position when faced with adversity were explored by administering a Leadership Resilience Profile questionnaire followed by in-depth interviews with five Georgia female superintendents. The questionnaire featured a rating scale to identify each participant's perception of individual resilience …

Barriers To And Facilitators Of Latino Parent Involvement: One Georgia District's Perspective, Lakshmi Subramaniam

College of Graduate Studies: Theses & Dissertations

The face of America's school is changing bringing in students from all over the world, predominantly Spanish speaking students from Mexico and Central and South America. Parents of these students are trying to balance the various challenges that moving to a new country can bring, including fostering success in school for their children. Oftentimes, their jobs, their immigration status, or their lack of education prevent them from speaking out and sharing their experiences. Many of these families are in areas of the country where immigration issues are relatively new. Unfortunately, statistics on academic achievement and drop-out rates for these Latino …

Secondary Students' Perceptions Of Teacher Quality, Catherine P. Sutcliff

College of Graduate Studies: Theses & Dissertations

This study examined the perceptions of secondary students and teacher quality during their years in high school. The study sought to compare responses among males and females and among ethnicities to determine if there were differences in perceptions of teacher quality with respect to student-teacher relationships, instructional methods, and justice and fairness. Surveys were given to students from eight public high schools in a southeastern region of Georgia. Demographic questions were included in the survey to delineate responses by gender and ethnicity. This study generated data from 663 students to determine student perceptions of teacher quality in the areas of …

Academic Tenure: Defining Scholarship In The Health Professions, Kimberly Mathieu Coulton

College of Graduate Studies: Theses & Dissertations

Higher education institutions in the United States grant academic tenure to junior faculty based on teaching, service, and scholarship. Traditionally, scholarship is defined as original research that is demonstrated by reports of scientific findings, peer-reviewed journal publications and presentations. However, workload issues, insufficient institutional support and ambiguity in tenure guidelines often hinder the scholarly endeavors of university faculty seeking tenure. The roles and responsibilities of faculty in the allied health professions are unique in that they are also involved in the provision of patient care, the development of community partnerships and the task of addressing vital workforce needs. A broader …

Bullying Behaviors And Attachment Styles, Kylie Williams

College of Graduate Studies: Theses & Dissertations

Peer victimization has become highly prevalent in Western schools with some studies showing that as many as 50% of high school students report having victimized or been victimized (Gaul, 2010). Past research has shown that several parental factors, such as involvement (ConnersBurrow et al., 2009) and support (Hill et al., 2004) have been linked to many childhood outcomes, such as the presence of aggressive behaviors. Parental involvement has also been linked to the likelihood of becoming a victim of school bullying (Jeynes, 2008). Although some researchers have found correlations between maternal attachment and externalizing behaviors in females and between paternal …

Teacher Candidates' Digital Literacy And Their Technology Integration Efficacy, Rona Lynette Tyger

College of Graduate Studies: Theses & Dissertations

The purpose of this study was to investigate perceived digital literacy levels and technology integration efficacy of preservice teaching (PST) candidates. The sample was comprised of PST candidates from two universities and one college in the southeastern United States that differ in size and culture. The study used a quantitative approach. PST candidates self-rated their digital literacy levels and technology integration efficacy using an online digital literacy survey. The relationship between PST candidates' perceptions of their digital literacy level and their level of technology integration efficacy was investigated. The existence of a digital divide has recently been of concern to …

Intertwined Cultural Journeys: An Autoethnography Of Learning, Teaching, And Affirming Diversity Through Multicultural Music, Kathryn Blackmon

College of Graduate Studies: Theses & Dissertations

As our schools gain more and more children from different cultures and ethnicities, there is an increasing need to diversify curriculum to assist in cultivating tolerance and understanding. Drawing upon an eclectic group of theorists who highlight the importance of meaningful curricula and education, and using autoethnography as method, I explore aspects of reflective teaching and student empowerment through the medium of multicultural music education. Connections between my own cultural heritage and the cultures of my students were made through a critical evaluation of my current approach to multicultural music education. Using multiple information sources including student observations, lesson plans, …

A Psychoanalytic Inquiry Into Social Aggression As A Form Of Bullying Among Female Students, Tina Martin Debevec

College of Graduate Studies: Theses & Dissertations

Bullying among children and adolescents, particularly within the school setting, has drawn much attention in recent years as a reaction to an onslaught of high profile school violence in the 1990s. While much attention and research focused upon physical violence that was prevalent among male students, very little research covered indirect, relational, and social forms of aggression. Research into the covert manners of aggression that involved the manipulation of relationships revealed them to be salient among female students, demonstrating that female students were predominantly aggressive in a different manner than their male counterparts. Psychoanalytic theories of attachment and aggression guide …