Digital Commons Network^™

Asynchronous 3d (Async3d): Design Methodology And Analysis Of 3d Asynchronous Circuits, Francis Corpuz Sabado

Graduate Theses and Dissertations

This dissertation focuses on the application of 3D integrated circuit (IC) technology on asynchronous logic paradigms, mainly NULL Convention Logic (NCL) and Multi-Threshold NCL (MTNCL). It presents the Async3D tool flow and library for NCL and MTNCL 3D ICs. It also analyzes NCL and MTNCL circuits in 3D IC. Several FIR filter designs were implement in NCL, MTNCL, and synchronous architecture to compare synchronous and asynchronous circuits in 2D and 3D ICs. The designs were normalized based on performance and several metrics were measured for comparison. Area, interconnect length, power consumption, and power density were compared among NCL, MTNCL, and …

Energy-Aware Sparse Sensing Of Spatial-Temporally Correlated Random Fields, Zuoen Wang

Graduate Theses and Dissertations

This dissertation focuses on the development of theories and practices of energy aware sparse sensing schemes of random fields that are correlated in the space and/or time domains. The objective of sparse sensing is to reduce the number of sensing samples in the space and/or time domains, thus reduce the energy consumption and complexity of the sensing system. Both centralized and decentralized sensing schemes are considered in this dissertation.

Firstly we study the problem of energy efficient Level set estimation (LSE) of random fields correlated in time and/or space under a total power constraint. We consider uniform sampling schemes of …

Student Voice Initiative: Exploring Implementation Strategies, Blaine G. Alexander

Graduate Theses and Dissertations

Student voice is the process of allowing students to work collaboratively with adults to produce a learning culture that is conducive for optimum growth in every student. In a traditional setting, the adults make the decisions and the students are passive observers in the learning process. Data has shown that this traditional culture is not advantageous to student learning for all students. Research has shown that students are seven times more academically motivated when they have the opportunity to have a voice in their personal learning process (Quaglia, 2016). This case study centered on the Northeast Arkansas Regional Student Voice …

Developing Algorithms For Quantifying The Super Resolution Microscopic Data: Applications To The Quantification Of Protein-Reorganization In Bacteria Responding To Treatment By Silver Ions, Sai Divya Challapalli

Graduate Theses and Dissertations

Histone-like nucleoid structuring proteins (HNS) play significant roles in shaping the chromosomal DNA, regulation of transcriptional networks in microbes, as well as bacterial responses to environmental changes such as temperature fluctuations. In this work, the intracellular organization of HNS proteins in E. coli bacteria was investigated utilizing super-resolution fluorescence microscopy, which surpasses conventional microscopy by 10–20 fold in spatial resolution. More importantly, the changes of the spatial distribution of HNS proteins in E. coli, by addition of silver ions into the growth medium were explored. To quantify the spatial distribution of HNS in bacteria and its changes, an automatic method …

Peptoid-Modified Bicelles As Surrogate Cell Membranes For Membrane Protein Sensors And Analytics, Helya Najafi

Graduate Theses and Dissertations

Membrane-affiliated interactions are significant in understanding cell function, detecting biomarkers to diagnose disease, and in testing the efficiency of new therapeutic targets. Model membrane systems have been developed to study membrane proteins, allowing for stable protein structure and maintaining native activity. Bicelles, disc-shaped lipid bilayers created by combining long- and short-chain phospholipids, are the model membrane system of focus in this study. Bicelles are accessible from both sides and have a wide size range, which make them attractive for studying membrane proteins without affecting function. In this work, bicelles were functionalized with two peptoids to alter the edge and face …

Energy Shaping Control For Stabilization Of Interconnected Voltage Source Converters In Weakly-Connected Ac Microgrid Systems, Nadia Lenora Carmita Smith

Graduate Theses and Dissertations

With the ubiquitous installations of renewable energy resources such as solar and wind, for decentralized power applications across the United States, microgrids are being viewed as an avenue for achieving this goal. Various independent system operators and regional transmission operators such as Southwest Power Pool (SPP), Midcontinent System Operator (MISO), PJM Interconnection and Electric Reliability Council of Texas (ERCOT) manage the transmission and generation systems that host the distributed energy resources (DERs). Voltage source converters typically interconnect the DERs to the utility system and used in High voltage dc (HVDC) systems for transmitting power throughout the United States. A microgrid …

An Analysis Of Scholarship Distribution By Division I Softball Coaches, Donovan James Nelson

Graduate Theses and Dissertations

The purpose of this study was to explore fairness factors used by NCAA Division I head softball coaches in scholarship distribution. Research by Hums & Chelladurai introduced Distributive Justice principles to intercollegiate athletics; indicating need was a popular distribution principle. Continued research by Mahony, Hums, & Riemer determined need as a common distribution principle in athletics. Prior to this study, no research has been done to examine distribution principles by NCAA Division I softball coaches based on distributive justice principles. This study used a single scenario of grant-in-aid distribution with six possible decisions coaches make to determine fairness of grant-in-aid …

Economic And Policy Evaluations And Impacts Of The National Rice Development Policy Strategies In Malaysia: Self-Sufficiency, International Trade, And Food Security, Roslina Binti Ali

Graduate Theses and Dissertations

Despite the fact that the recent rice policy has been moving to a strategy of self-sufficiency while the status quo of the national rice economy remains ambiguous, Malaysia has made an extreme policy decision to pursue an autarky economy in its rice sector, thus closing borders from the international markets in the future. The goal of this dissertation research is to comprehensively evaluate a deep-rooted rice policy in Malaysia and analyze the holistic impacts of the self-sufficiency and international trade policies at the national and farm-household levels, utilizing economic frameworks. The protectionist policy measures using a Policy Analysis Matrix reveals …

A Phenomenological Study Of The Online Education Experiences Of College Students With Learning Disabilities, Michael Murders

Graduate Theses and Dissertations

The body of research concerning college students with learning disabilities is sparse relative to the percentage of college students with learning disabilities who attend college. Further, the majority of existing research fails to capture the student voice and the lived experiences of the students themselves. The purpose of this study was to explore the experiences of college students with learning disabilities who utilized online education at a public university centrally located in the United States, resembling numerous comprehensive regional universities. Using a qualitative, phenomenological research framework, this study uses in-depth individual interviews to collect data from eight participants. Interviews were …

Local Item Response Theory For Detection Of Spatially Varying Differential Item Functioning, Samantha Robinson

Graduate Theses and Dissertations

Mappings of spatially-varying Item Response Theory (IRT) parameters are proposed, allowing for visual investigation of potential Differential Item Functioning (DIF) based upon geographical location without need for pre-specified groupings and before any confirmatory DIF testing. This proposed model is a localized approach to IRT modeling and DIF detection that provides a flexible framework, with current emphasis being on 1PL/Rasch and 2PL models. Applications to both simulated and empirical survey data, utilizing a box-car kernel weighting scheme with several fixed bandwidths on irregular spatial lattices, are presented both to demonstrate the methodology and to illustrate the benefit of localized IRT modeling. …

The Effect Of Preflood Nitrogen And Flood Establishment Timing On Rice Development, Nitrogen Uptake And Grain Yield, Tyler Richmond

Graduate Theses and Dissertations

Urea-N fertilizer is typically applied at the 5-leaf stage to rice (Oryza sativa L.) grown in a dry-seeded, delayed-flood production system. How long the preflood-N can be delayed without adverse effects on yield potential is poorly understood. The research objective was to determine the effects of preflood-N application and flood establishment timing on aboveground-N content, 50% heading, yield components, and grain yield. Trials were established on silt loam soils at the Pine Tree Research Station (PTRS) and Rice Research and Extension Center (RREC) during 2015 and 2016. Urea-N was applied at 0, 45, 90, 135, and 180 kg N ha-1 …

Writing For Keeps-Instruction And Achievement, Jason Adams

Graduate Theses and Dissertations

The study was conducted in a small rural Texas district. Students within the district were struggling with successful writing initiatives. Achievement and accountability within the district were below state and regional averages consistently for many years. Writing instruction in the district needed attention to help students and teachers experience writing success. The study aimed to answer the following research questions: (1) What instructional practices do Frazier ISD teachers utilize to teach writing? (2) What aspects of writing do Frazier ISD students struggle to understand? (3) To what extent does the State of Texas Assessments of Academic Readiness (STAAR) test impact …

The Diffusion Of Veterans Treatment Courts: An Examination Of Political, Social, And Economic Determinants At The County Level, Eric D. Button

Graduate Theses and Dissertations

In 2008, leading U.S. counties adopted innovative treatment courts specializing in the unique needs of veterans with substance abuse and other legal issues. Since then, pro-veteran advocacy has aided in the continued diffusion of additional veterans treatment courts (VTCs), with more than 300 county and state-level VTCs currently operating in 46 states across the country. Though the lens through which veterans are viewed may be positive in the public eye, institutional support for these wayward veterans appears to vary across levels of government; therefore, while some posit the increased social utility of budget-friendly VTCs, others suggest that VTCs offer favorable …

Native Advertising And Disclosure, Katherine Alexis Hunt

Graduate Theses and Dissertations

This paper reviews the growing combination of advertising and editorial content in the converged paid media form of native advertisements. Because native advertisements have the potential to negatively impact the credibility of traditional news organizations by misleading consumers through hidden persuasion attempts, this text reviews native advertisements in five prominent online newspapers for disclosure and source credibility.

Through a content analysis of 130 online newspaper native ads, this paper reviews disclosure according to FTC guidelines for native advertising proximity and placement, prominence, reputation, and language. In addition, this text reviews source credibility by attribution and source status: executives, professionals, public …

Motivating Teachers To Lead In Low-Performing Schools: A Qualitative Study Of School Leaders In Three Arkansas High Schools, Joseph D. Fisher

Graduate Theses and Dissertations

This qualitative research study addressed the problem of motivating teachers to take on leadership roles in “low-performing” schools. Coupled with the high demands of the Every Student Succeeds Act (ESSA) being placed on public school principals to ensure that all students achieve and successfully graduate high school, better ways to distribute leadership and share responsibilities among teachers were identified. The research question and purpose of this phenomenological study was to identify the perceived leadership behaviors of high school principals in once labeled “low-performing” schools that support the motivation of teachers to take on leadership roles. Nine identified teacher leaders and …

The Perception Of The Freshman Transition: Taking A Closer Look At The Freshman Academy, Frankie Jo Lizar

Graduate Theses and Dissertations

The purpose of this study was to examine teacher, student, and parent perceptions of the high school transition program within a Freshman Academy at one Midwest high school using a mixed-methods approach with a convergent design. Interviews were done with teachers that teach primarily freshman students, and perception surveys were used with teachers, students, and parents to answer the following research questions:

a) How do freshman teachers believe the Freshman Academy interventions influence students’ successful transition into high school?

b) What are staff’s perceptions of the Freshman Academy in preparing students for success in high school?

c) What are students’ …

The Impact Of A Positive Environment And Shared Leadership To Empower Collegial School Culture, Ben Pretz

Graduate Theses and Dissertations

The purpose of this study is to develop an empowered collegial school culture to systemically improve the function of the academic institution through the impact of a positive environment and shared leadership. When compared to the other middle schools in the district, Eagle Middle School had the lowest math achievement growth index during the 2014-2015 school year. The discrepancy in math achievement is one element that has created a culture problem for the building. Additionally, the building has a reputation of poor customer service and not serving the community effectively. Because of the poor culture the staff had a lack …

College And Career Ready Through Personalized Learning: Business And Industry Perspective Of The Don Tyson School Of Innovation, Joe R. Rollins

Graduate Theses and Dissertations

This qualitative research study describes perceptions of Northwest Arkansas’ business, industry and post-secondary institutions as to the Don Tyson School of Innovation (DTSOI) and its ability to prepare students for Northwest Arkansas’ college and career needs. Designated as one of the first schools of innovation in Arkansas through ACT 601 of 2013 by the Arkansas Department of Education (ADE), the DTSOI employs Science, Technology, Engineering, and Mathematics (STEM) in every aspect of curriculum. The DTSOI represents the first school in Arkansas to hold the distinction of holding both school of innovation status as well as being a public, district- conversion …

Potential Relationships Of Community College Faculty Credentials And Measures Of Instructional Effectiveness: Student Survey Of Instruction And Grades, Marc Alan Willis

Graduate Theses and Dissertations

The purpose of this research was to determine what, if any, relationship existed when considering instructor credentials in relation to student surveys of instruction (SSOI), instructor credentials in relation to grade distribution, and the relationship between SSOI and grade distribution. The case study college is a two-year rural institution in Oklahoma employing 53 full-time faculty in Fall 2016. Eighteen of those faculty lack the adequate credentials as required by the Higher Learning Commission, the accrediting body for the college. Very little information was discovered verifying the impact of credentials on effectiveness, and what was located was anecdotal rather than data …

A Molecular Diagnostic Survey Of Pathogens And Parasites Of Honey Bees, Apis Mellifera L., From Arkansas And Oklahoma, Dylan Cleary

Graduate Theses and Dissertations

The health and viability of colonies of the honey bee, Apis mellifera, in the United States have fluctuated dramatically over the past decade. This poses a substantial threat to agricultural production in this country. Currently, no single factor has been identified for this decline. Rather, it has been suggested that the interaction between multiple biotic and abiotic stressors may be responsible. Among these factors are pesticides, habitat loss, climate and weather, parasites and pathogens, and colony management techniques. For this reason, it is important to examine the prevalence of honey bee parasite and pathogen infection at the state level in …

Presidential Fundraising: A Multiple Case Study Of Rural Serving Oklahoma Community Colleges, Jason Daniel Falkner

Graduate Theses and Dissertations

Community college presidents serving rural populations in the state of Oklahoma have been forced to take on new responsibilities related to institutional fundraising due to multiple economic challenges including continued budgetary shortfalls and limited resource allocation. Review of the academic literature addressing this subject exposed a wide variety of rationales associated with this leadership shift, as well as successful presidential approaches to fundraising in modern higher education. This qualitative study of rural community college presidents in Oklahoma examined the rationale for expanded presidential roles in fundraising, while outlining a number of other essential roles, characteristics, professional backgrounds, and stressors that …

Free-Space Measurements Of Dielectrics And Three-Dimensional Periodic Metamaterials, Clifford E. Kintner

Graduate Theses and Dissertations

This thesis presents the free-space measurements of a periodic metamaterial structure. The metamaterial unit cell consists of two dielectric sheets intersecting at 90 degrees. The dielectric is a polyetherimide-based material 0.001” thick. Each sheet has a copper capacitively-loaded loop (CLL) structure on the front and a cut-wire structure on the back. Foam material is used to support the unit cells. The unit cell repeats 40 times in the x-direction, 58 times in the y-direction and 5 times in the z-direction. The sample measures 12” × 12” × 1” in total. We use a free-space broadband system comprised of a pair …

Developing Methods Of Obtaining Quality Failure Information From Complex Systems, Oladapo Olalekan Bello

Graduate Theses and Dissertations

The complexity in most engineering systems is constantly growing due to ever-increasing technological advancements. This result in a corresponding need for methods that adequately account for the reliability of such systems based on failure information from components that make up these systems.

This dissertation presents an approach to validating qualitative function failure results from model abstraction details. The impact of the level of detail available to a system designer during conceptual stages of design is considered for failure space exploration in a complex system. Specifically, the study develops an efficient approach towards detailed function and behavior modeling required for complex …

Exploring The Empirical Relationship Between Civic Agriculture And Community Resilience, Beth Joanna Person-Michener

Graduate Theses and Dissertations

Smaller-scale, qualitative and mixed method studies indicate that civic agriculture generates positive, local-level social change, specifically by increasing social, human and economic capital. These social benefits are also identified as some of the crucial components needed for community resilience to disasters. However, literature directly linking civic agriculture to community resilience is sparse and there is little if any research explicitly examining a relationship between civic agriculture and community resilience. This study lends national scope and an empirical examination of evidence for a positive relationship between civic agriculture and community resilience along the applicable domains of social, human and economic capital …

Qualitative Analysis Of Social Capital In Arkansas – A Case Study Based Approach, Valerie Kilders

Graduate Theses and Dissertations

Despite the vast research on social capital in general, only very little research is focused on the quality of social capital. While some research studies incorporated aspects that are associated with the quality of social capital, they often take a one dimensional approach that fails to take the different aspects of the topic into consideration. In order to gain more insights into this I conducted a series of semi-structured interviews in three rural counties in Arkansas. The counties were selected on the basis of a social capital index of all U.S. counties using quantitative measures. I used a guide on …

The Effects Of Sprayer Speed And Droplet Size On Herbicide Burndown Efficacy, Justin Carroll

Graduate Theses and Dissertations

An Apache AS1220 self-propelled boom sprayer with a 27.4 m (90 ft) boom was equipped with different sizes (02, 04 and 06) and types (TeeJet AI, XR, AIXR and TTI) of nozzles to achieve medium, very coarse and ultra coarse droplet sizes traveling 11 km/h (7 mph), 19 km/h (12 mph), and 29 km/h (18 mph). These combinations of speed and droplet size were evaluated for percent coverage of the spray and percent control of targeted weeds 3, 7, and 15 days after treatment (DAT). Four replications were conducted for each speed and droplet size combination except for at 19 …

Identifying Three-Way Gene Interactions From Microarray Data Using Kolmogorov-Smirnov And Cross-Match Tests, Shubhashree Khadka

Graduate Theses and Dissertations

Human gene network is much more complex than just pairwise interaction among the genes. Zhang et al. [6] extracted microarray data from International Genomics Consortium (IGC), and presented the detection of three-way gene interactions in their paper using Fisher’s z-transformation test. Three-way gene interactions are closer than pairwise correlations in representing the complex gene structures. Additionally, it was more tractable than assessing four or more gene interactions. In this paper, we are simulating different models where Fisher’s test might not be as effective. Zhang et al.’s approach utilized Pearson’s correlation coefficients and involved detection of linear interactions only. Since gene …

Essays On Common-Pool Resources: Evaluation Of Water Management And Conservation Programs, Kuatbay K. Bektemirov

Graduate Theses and Dissertations

This dissertation is comprised of three essays that examine water management and conservation programs through the context of sustainable development. These essays are distinct case studies of national, state and local policies. Their common approach is that they all use common-pool resources theory to generate specific recommendations for policymaking and water management.

The first essay explores opportunities for developing policy measures to prevent the collapse of the vital irrigation infrastructure in the Aral Sea region. The paper looks at the economic efficiency of various policy options, impacts on the country’s agricultural sector, and the regulations needed to make the cost-sharing …

From Foster Care To College: Student Stories Of Success, Tory Nicole England

Graduate Theses and Dissertations

The purpose of this qualitative study was to understand the different factors that empower young adults that were in foster care to be successful in a college environment. It has been documented that foster youth have significant challenges during secondary education (Conger & Rebeck, 2001; Geenen & Powers, 2006). Due to these challenges, foster youth attend and graduate higher education at a lower rate than their peers. The perspectives of foster youth currently enrolled in higher education is critical to determining which factors and programs have helped with their educational success. Five participants completed semi-structured interviews about their secondary education, …

The Influence Of Visual Storytelling On The Occupational Aspirations Of Non-Agricultural Undergraduate Students, Hanan Marie Southard

Graduate Theses and Dissertations

The agricultural industry has been experiencing a shortage in qualified college graduates to fill its numerous open positions in recent years. The purpose of this study was to investigate the influence of visual storytelling on the occupational aspirations of non-agricultural undergraduate students. Social media channels, virtual storytelling and the higher education classroom provide a unique opportunity to convey information about and recruit students into the agricultural career field. The diffusion of innovation model provides the framework for the introduction of agricultural jobs in a non-agricultural business classroom while the social cognitive theory provides the understanding of the importance of self-efficacy …