Digital Commons Network^™

Synchrophasor Assisted Efficient Fault Location Techniques In An Active Distribution Network, Anil Khanal

Dissertations

Reliability of an electrical system can be improved by an efficient fault location identification for the fast repair and remedial actions. This scenario changes when there are large penetrations of distributed generation (DG) which makes the distribution system an active distribution system. An efficient use of synchrophasors in the distribution network is studied with bidirectional power flow, harmonics and low angle difference consideration which are not prevalent in a transmission network. A synchrophasor estimation algorithm for the P class PMU is developed and applied to identify efficient fault location. A fault location technique using two ended synchronized measurement is derived …

A Novel Approach For Identifying Cloud Clusters Developing Into Tropical Cyclones, Chaunte' W. Lacewell

Dissertations

Providing advance notice of rare events, such as a cloud cluster (CC) developing into a tropical cyclone (TC), is of great importance. Having advance warning of such rare events possibly can help avoid or reduce the risk of damages and allow emergency responders and the affected community enough time to respond appropriately. Considering this, forecasters need better data mining and data driven techniques to identify developing CCs. Prior studies have attempted to predict the formation of TCs using numerical weather prediction models as well as satellite and radar data. However, refined observational data and forecasting techniques are not always available …

Examining The Relationship Between Student Engagement And Stem Persistence At An Hbcu, Saundra Yates Evans

Dissertations

A growing imbalance in the demand for a science and technology workforce and the declining availability of a science and technology talent pool is challenging America’s world dominance in research and innovation, economic performance, and quality of life. Contributing to this imbalance is flatness in the trend of students selecting science, technology, engineering and mathematics (STEM) majors coupled with decreasing rates of retention in STEM disciplines. Many research studies and reports emphasize that incorporating the untapped talents of Americans who are underrepresented in STEM disciplines--African-Americans, Hispanics, and women--is necessary to increase the pipeline of STEM graduates. A synthesis of college …

The Leadership Efficacy Of Graduates Of North Carolina School Of Science And Mathematics: A Mixed-Methods Analysis, Renee Mason Letita

Dissertations

This study examines the leadership efficacy amongst graduates of NCSSM from the classes of 2000–07 as the unit of analysis. How do NCSSM graduates’ perceptions of their leadership efficacy align with research on non-cognitive variables as indicators of academic performance using the unit of analysis as a performance outcome? This study is based on the theoretical construct that non-cognitive psychological (also called motivational) factors are core components of leadership self-efficacy, indicative of NCSSM graduates (who had high academic performance and attained STEM degrees). It holds promise for increasing both student interest and diversity in the race to strengthen the STEM …

Indiana's High-Stakes Reading Assessment: Impact On Professionalism And Instructional Practices Of Elementary Teachers, Michelle A. Fish

Dissertations

Problem.

Since the turn of the twenty-first century, political mandates have been the driving force behind educational decision-making. The execution of the federal Race to the Top Assessment Program in 2009 ushered in a new era of accountability measures for educators, resulting in a significant increase in the number of state assessments, including the implementation of the Indiana Reading Evaluation and Determination (IREAD-3) summative assessment in the spring of 2012. Within this model of top-down, political decision-making, the collective voice of educators has been minimized as instructional practice has been driven by student performance on standardized assessments. The purpose of …

Testing The Technology Acceptance Model 3 (Tam 3) With The Inclusion Of Change Fatigue And Overload, In The Context Of Faculty From Seventh-Day Adventist Universities: A Revised Model, David Andrew Jeffrey

Dissertations

Problem.

In recent years, the use of technology in institutions of higher learning has grown significantly. The use of Learning Management Systems (LMSs) is central to this growth. LMSs assist in the ease, consistency, and effectiveness of delivering instruction to students. The challenges involved in implementing an LMS, and the time pressures placed on faculty make decisions concerning LMSs particularly crucial. Since the goal of administration is to encourage adoption and optimal usage of the LMS by as many faculty members as possible, the focus of this study is the dynamic of factors that predict usage of Learning Management Systems. …

Design, Synthesis, And Biological Evaluation Of Folate Targeted Photosensitizers For Photodynamic Therapy, Laura Jean Donahue

Dissertations

Photodynamic therapy (PDT) is used to treat cancer, and involves a highly conjugated molecule, called a photosensitizer (PS), which is excited by wavelengths of light from visible to infrared. Photosensitizers that are highly conjugated will absorb longer wavelengths (600 – 900 nm), and have the potential to destroy cells of deeper tissue cancers. In PDT, a PS is administered to the patient, and after an appropriate time delay, the tissue is then exposed to light of a specific wavelength necessary for excitation of the PS. A transfer of energy can take place between the excited PS and oxygen that is …

Participant Engagement In Home Visits: A Missing Piece In The Puzzle Of Evidence Based Programs And Implementation Science?, Mariel Sparr

Dissertations

Within the social services field, researchers, policy makers, and practitioners are paying increasing attention to the concept of `evidence based' home visiting program models. However, a singular focus on evidence based programs continues a tradition of limited and vague understandings of how programs are actually implemented.

The field of implementation science offers a framework for expanding this focus to more fully understand how home visiting programs are implemented. A key dimension of implementation is participant responsiveness. The field of home visiting lacks a coherent and standard conceptualization of participant responsiveness. As one might expect, it also lacks standard measurement of …

Up From Sea And Earth: Revelation 13:1, 11 In Context, Hugo Antonio Cotro

Dissertations

The wide spectrum of usually unreconcilable ways sea and earth have been interpreted in Revelation 13: 1 and 11, as chapter 2 exposes, prompts questions such as What did John mean in Rev 13:1, 11 by coming up from the sea and the earth or land? What could his original addressees have understood when they heard it for the first time? These are the basic questions this dissertation aims to answer through a reconstruction of the original context shared by John and his first-century Asian audience, and, in that light, of the sources he most probably used to paint his …

Marital Expectation Fulfillment And Its Relationship To Height Of Marital Expectations, Optimism, And Relationship Self-Efficacy Among Married Individuals, Kristina D. Johnson

Dissertations

Problem

The literature is clear that individuals report higher marital satisfaction when their expectations are fulfilled in marriage, but there is disagreement in the literature as to what role height of expectations plays in expectation fulfillment. Further research in this area was needed to clarify these disagreements and identify variables that interact with height of expectations to determine marital satisfaction.

Method

Participants completed surveys that measured their a) martial satisfaction, b) optimism, c) relationship self-efficacy, d) height of marital expectations, and e) the extent to which participants felt their marital expectations were being met. Structural equation modeling was used to …

A Structural Equation Model Of The Influence Of Personal, Behavioral, And Environmental Factors On The Writing Performance Of First-Year Students At A Selected Michigan Community College, Thula I. Norton Lambert

Dissertations

Problem.

While previous writing performance studies have examined a range of motivational variables such as self-efficacy or writing apprehension, certain contextual variables and variables related to current writing pedagogy and practice have not been included, which has resulted in gaps in the research literature.

Method.

A non-experimental, correlational, cross-sectional, ex post facto, survey research design was used to examine the personal, behavioral, and environmental factors that had been identified as being of potential influence to students’ writing performance. A census was conducted among the 233 students enrolled in English Composition on the two campuses of a small two-year college in …

The Use Of Fantasy Theme Analysis To Describe The Group Communication And Creative Problem-Solving Skills Of University-Level Students As They Prepare For Destination Imagination Global Finals Competition, Elizabeth Morgan Armstrong

Dissertations

Problem and Purpose

In order to meet the growing needs for efficiency in the workplace, industry is turning to group-work and collaboration. Successful teams are in demand because they not only meet the efficiency needs, but also provide the kind of bonding that creates convergence in the members. The chemistry or recipe for this kind of success is difficult to pinpoint, however, and several aspects of group communication and skills, need to be re-examined using communication theory. The purpose of this study is to describe one of those aspects—group creative problem-solving—in order to see how the communication used in that …

Under-Represented Students' Engagement In Secondary Science Learning: A Non-Equivalent Control Group Design, Joy J. Vann-Hamilton

Dissertations

Problem.

A significant segment of the U.S. population, under-represented students, is under-engaged or disengaged in secondary science education. International and national assessments and various research studies illuminate the problem and/or the disparity between students’ aspirations in science and the means they have to achieve them. To improve engagement and address inequities among these students, more contemporary and/or inclusive pedagogy is recommended. More specifically, multicultural science education has been suggested as a potential strategy for increased equity so that all learners have access to and are readily engaged in quality science education. While multicultural science education emphasizes the integration of students’ …

Science Teaching And Learning As Transformation: Making Meaning With My Students, Megan Marie Leider

Dissertations

As a classroom science teacher, I have experienced firsthand the disengagement and disinterest students have with science. Students often struggle to retain information from year to year, feel comfortable in the science classroom, and see the connections between the science taught in the classroom and their lived experiences. It is obvious to me that we could do more for our students. One way in which to assist students with science learning is through the incorporation of Sci-YAR (Science Youth Action Research). Sci-YAR is a curricular framework and instructional strategy that places the student at the center of their learning. It …

The Influence Of Racial And Crime Stereotypes On Jurors' Representations Of Trial Evidence And Verdict Decisions, Katharina Kluwe

Dissertations

Past research has shown that jurors tend to make more severe culpability judgments when defendants are charged with crimes that are associated with their racial group (e.g., Jones & Kaplan, 2013). Although the Story Model (e.g., Pennington & Hastie, 1988) has received much empirical support and currently is the most prominent model in the juror decision making literature, it has not been applied to cases where racially stereotypical crimes might bias verdict decisions. The present research investigated whether the narrative believability of the stories that are suggested at trial, especially story coherence, would explain the effect of race-crime congruence on …

Pedagogical Content Knowledge In Early Mathematics: What Teachers Know And How It Associates With Teaching And Learning, Yinna Zhang

Dissertations

The study was designed to examine the profile of early childhood teachers' content-specific knowledge, also referred to as pedagogical content knowledge, in early mathematics (PCK-EM) and investigate how PCK-EM relates to the quality of their mathematics teaching quality and students' mathematical learning outcomes. A total of 182 teachers working with high need students from Pre-K through Grade 3 in an urban public school system participated in the study and analyzed a video of mathematics teaching through an online survey. The results painted a bleak picture regarding the profile of early childhood teachers' PCK-EM: as a whole, teachers' survey responses lacked …

Synthesis And Testing Of Photosensitizer-Folate Conjugates And Potential Photosensitizers For Photodynamic Therapy, Jeffrey A. Trautmann

Dissertations

Dissertation Proposal for Jeffrey Trautmann

Photodynamic Therapy (PDT) is a technique that destroys oncogenic (cancerous) cells. It has been used in several countries since the 1980’s. Molecules that contain chromophores can function as photosensitizers, and will absorb light at various wavelengths (that being dependent upon the extent of their conjugation). Certain functional groups, upon absorption of light, can be used to convert O2 to singlet oxygens which are destructive to the cellular environment. Once an in-vitro cell contains a high enough concentration of photosensitizer material and light is able to reach the photosensitizer material, PDT can be used effectively to …

Teacher Mathematics Language: Its Use In The Early Childhood Classroom And Relationship With Young Children's Learning, Emma Whitman

Dissertations

Early mathematics instruction has been linked to children's later outcomes in both literacy and mathematics. One important component of this instruction, teachers' mathematics language in the early childhood classroom, has been connected to children's mathematical gains. However, this work is lacking in both scope and depth. The objective of this study was to provide a review of the use of math language by early childhood teachers and address the issues neglected in the current literature. The study looks at: the type of content that teachers' mathematics language emphasizes, the mediating effects of settings on the mathematics language that is used, …

Academic Achievement Of Latino Emerging Adults: The Role Of Language Brokering, Executive Functions, And Language Proficiency, Valerie Christina Flores

Dissertations

A vast literature has examined bilinguals’ strengths in executive functions (EFs) without considering how language brokering, or translating frequently for family and friends, relates to such advantages in EFs. At the same time, Latinos students – many of whom are bilingual – are the largest minority group attending college today in the U.S., despite being less likely to receive a bachelor’s degree. The overarching goal of the present study was to explore whether language brokering practices among Latino emerging adults led to better cognitive skills and ultimately greater academic achievement in college. Data were collected from multiple cohorts of bilingual …

Reform Through A Student Lens: The Experience Of Latino A Students In An International Baccalaureate Diploma Program In Chicago, Sandra Arreguin

Dissertations

This dissertation is a study of Latinos participating in the International Baccalaureate Diploma Program in Chicago. Phenomenological interview techniques were used to explore the experiences and perceptions of Latino students in IB. By looking at Latino/a students separately the study captured the strengths, challenges, and needs unique to this group, which will inform the future of this rapidly growing curriculum reform effort.

Schisms In Schooling: Domains Of Power As Seen From Our Students, Kristen Michelle Taylor

Dissertations

This study investigated the dynamics of power available to students who are assigned to participate in small group instruction as an intervention to low academic scores. It proposes that student experiences of the phenomenon of small group instruction are not currently present in the research literature concerning low student performance in public education, and therefore the research literature is incomplete. A case study was conducted at a public school in St. Louis, Missouri, which resulted in a case of two teachers and five students recruited to participate. Through document analysis, classroom observations, and participant interviews, the participants provided data from …

Proprioception And Developmental Motor Training: A New Treatment For Chronic-Phase Stroke Patients

Dissertations

With stroke occurrence increasing, along with survival rate, it is imperative to find ways of treating the chronic-phase of stroke. The purpose of this study was to determine if either or both of two interventions, or their combination, could improve functional performance in patients at least four years post-stroke. One intervention was resistance strength training while the other consisted of neurodevelopmental activities that parallel those used with developing children. Six participants, four male and two female, ranging in age from 23 to 60 (M age 44.5), were randomly assigned to one of the interventions. Participants ranged in stroke types and …

Network Flexibility For Recourse Considerations In Bi-Criteria Facility Location, Jeremy North

Dissertations

What is the best set of facility location decisions for the establishment of a logistics network when it is uncertain how a company’s distribution strategy will evolve? What is the best configuration of a distribution network that will most likely have to be altered in the future? Today’s business environment is turbulent, and operating conditions for firms can take a turn for the worse at any moment. This fact can and often does influence companies to occasionally expand or contract their distribution networks. For most companies operating in this chaotic business environment, there is a continuous struggle between staying cost …

Electrochemical Synthesis Of Nanostructured Noble Metal Films For Biosensing, Jay Kishan Bhattarai

Dissertations

Nanostructures of noble metals (Au and Ag) are of interest because of their important intrinsic properties. Noble metals by themselves are conductive, physically robust, chemically inert, and strongly bind to thiols. However, when the nanostructures are formed, they in addition possess high surface area and unique optical properties tunable by adjusting the shape and size. All of these properties make nanostructures of noble metals suitable candidates to be used as a transducer for biosensing. Individual nanostructures might be easier to prepare but difficult to handle to be used as a transducer. Therefore, we prepared and analyzed nanostructured films/coating of noble …

Technology Integration For Common Core State Standards Implementation: Developing Differentiated Professional Development Based On The Concerns-Based Adoption Model, Tami Boatright

Dissertations

Teachers must learn how to integrate technology for CCSS implementation in an educational environment tasked with preparing 21st century students to not only survive, but thrive in a knowledge-based global society. The changes required for 21st century learning to prepare 21st century students is transformational in nature and represents a paradigm shift for many teachers. The purpose of this quantitative study was to examine the differences in teachers’ Stages of Concern with integrating technology for implementation of CCSS according to age, gender, and years of teaching. In addition it was the purpose of this study to use information obtained from …

Development Of Workforce Skills: Student Perceptions Of Mentoring In First Robotics, Katie Joan Veal Wallace

Dissertations

In today’s global economy, new workforce competencies are needed for success at both individual and societal levels. The new workforce skills extend beyond basic reading, writing, and arithmetic to include higher order processes such as critical thinking and problem solving. Technical job opportunities have grown by approximately 17%, yet the United States continues to decline in science, technology, engineering and mathematics (STEM) disciplines. Further, U.S. students earn average or below average test scores when compared to other developed countries. Researchers cite the need to incorporate the learning of workplace skills into secondary education curriculum, and advocates call for new teaching …

Pre-Service Teachers: A Study Of Self-Theories Of Intelligence And Attitudes About Web 2.0, Lee Ann Smith

Dissertations

This study examined the relationship of pre-service teachers’ self-theories of intelligence (mindset) and their attitudes about Web 2.0. The research questions evaluate: (a) Whether a significant correlation exists between pre-service teachers’ mindsets and attitudes about Web 2.0 (social media), and (b) Whether significant differences exist between demographic groups (e.g., age, certification area, gender) and their attitudes about Web 2.0 (social media). Results of the study indicate that a weak correlation between pre-service teachers’ perceived mindsets and perceived attitudes about Web 2.0 was statistically significant. In addition, significant differences were found based upon certification area, gender, and age with the sample’s …

Perceptions Of Urban High School Teachers Transitioning From Traditional Instruction To Blended Learning, Michael Wayne Hamilton

Dissertations

Increasing demands for technology integration at the K-12 level have led school districts to explore blended learning as an option for sustaining productive instructional strategies while increasing technology integration in the classroom. Furthermore, Disruptive Innovation Theory (Christensen, 1997) offers insights as to the potential impact of blended learning on the field of education. This phenomenological study attempted to capture the lived experiences of urban high school teachers who were transitioning to a blended learning instructional strategy. In addition, this study utilized the Stages of Concern (SoC) component of the Concerns Based Adoption Model (CBAM) to isolate the phenomenon and provide …

Relationships Between Wellness-Related Behaviors And Academic Performance, Helene M. Alfano

Dissertations

This study investigated possible relationships between specific wellness-related behaviors and academic achievement by using self-reported data from the 2009 Michigan Youth Risk Behavior Survey (MYRBS). Participants were students from 50 public high schools in Michigan in grades 9 through 12 (N = 3,411). Survey responses were analyzed with an ordinal logistic regression procedure using SPSS software. Beyond the control model, the block of variables on (a) diet explained 9.3% of the variance in the outcome measure, an additional amount of variance that was statistically significant and practically important. Each of the remaining blocks, including (b) physical activity, (c) self-perception of …

A Co-Teaching Program Evaluation In A School District In Missouri, Tanya Marie Deering

Dissertations

This study was a program evaluation on the co-teaching model within the Smallville School District (a pseudonym) measuring its effectiveness defined by the perceptions of leaders in the field of special education. This study filled the gap of previous co-teaching studies by investigating a rural school district, across all buildings. The researcher selected the tools of classroom observations; convenience sample interviews; administrator, teacher, student, and parent surveys; and secondary data from High Quality Professional Development (HQPD) and the school budget. The researcher collected data with surveys, observations, and interviews to determine the perceptions of all stakeholders involved in the co-teaching …