Digital Commons Network^™

A Bayesian Abduction Model For Sensemaking, Paul W. Munya

Dissertations

This research develops a Bayesian Abduction Model for Sensemaking Support (BAMSS) for information fusion in sensemaking tasks. Two methods are investigated. The first is the classical Bayesian information fusion with belief updating (using Bayesian clustering algorithm) and abductive inference. The second method uses a Genetic Algorithm (BAMSS-GA) to search for the k-best most probable explanation (MPE) in the network. Using various data from recent Iraq and Afghanistan conflicts, experimental simulations were conducted to compare the methods using posterior probability values which can be used to give insightful information for prospective sensemaking. The inference results demonstrate the utility of BAMSS as …

Doctoral Students Mentoring Experiences And Their Perceptions Of The Impact On Research Behaviors: A Focus On Historically Black Colleges And Universities, Nadielka D. Bishop

Dissertations

Studies report that mentoring has a positive correlation with research development of doctoral students in higher education. Ten percent of Black doctoral degree recipients receive their education at Historically Black Colleges and Universities (HBCUs). Therefore, research mentoring at HBCUs should be examined. Understanding these environments can ensure diversity in higher education mentoring, tenured faculty positions, and research funding opportunities. This qualitative case study seeks to collect the research mentoring experiences reported by doctoral students at two HBCUs in the state of North Carolina and to report their perceptions of these experiences for characteristics relative to ten elements of Research Training …

Contribution To The Development Of A New Integrated Zonal Modeling Approach In Building Environment, Yao Yu

Dissertations

Various modeling approaches have been developed and applied to predict the heat and mass transfer phenomena within buildings. In consideration of the complexity of the phenomena observed, the results expected, the parameters investigated, and the degree of accuracy required, these modeling approaches can be categorized into three groups: Single-zone (and multi-zone) models, Zonal models, and Computational Fluid Dynamics (CFD) models. Zonal models, which combine the simplicity of single/multi-zone models with the comprehensiveness of CFD models, become better substitutes to predict detailed indoor thermal and airflow behaviors. Based on a geometrical partition of a room into a number of subzones, zonal …

A Mixed-Methods Comparison Of Standards-Based And Traditional Gradebooks In One High School, Kevin P. Mabie

Dissertations

Online gradebooks have gradually become a staple of schools in the 21st century. Students and parents have immediate access to grades, and the composition of these grades is transparent. While the purpose of the online gradebook may have initially been for the conveniences such systems offer the school and its stakeholders, it has also served as a catalyst for gradebook reform. Gradebook construction strategies have been called into question, and solutions which allow gradebooks to provide more accurate and specific information have been developed. This study explored student learning growth through the use of two different online gradebooks: a traditionally …

The Correlation Between The Geographical Region Of A High School And The Enrollment Ratio Of Males To Females In Accelerated College-Preparatory Level Mathematics Courses, Mary Anne Latragna

Dissertations

Females, in this modern age of feminism, have excelled in all fields of study and graduate from college in larger numbers than males. However, few women go into the STEM fields (Hill, Corbett, & St. Rose, 2010). To close this gap in mathematics-related fields, it is paramount that high schools produce female students who are advanced in Mathematics. The problem was the underrepresentation of females in mathematical fields of study, with a more pressing issue of underrepresentation of females in college preparatory mathematics classes at the high school level. The purpose of this study was to determine if the geographical …

Evaluation Of A Conceptual Model Of Student Retention At A Public Urban Commuter University, Hoa Khuong

Dissertations

A new conceptual model of student retention was developed and evaluated for first-year retention and for second-year retention of students at an urban, mid-western commuter university. The model captured the joint effects of academic engagement and environmental factors on academic performance and persistence of commuter students in their first two years of college attendance. The academic engagement and environmental factors incorporated into the model included: pre-college academic achievement, Deep Learning, Study Time per Week, College Math Readiness, Major Selection, Hours of Employment, receiving (or not receiving) a Pell Grant Award and Financial Concerns. Structural equation modeling techniques were utilized to …

Integrated Consensus Based Frameworks For Unmanned Vehicle Routing And Targeting Assignment, Waleed T. Barnawi

Dissertations

Unmanned aerial vehicles (UAVs) are increasingly deployed in complex and dynamic environments to perform multiple tasks cooperatively with other UAVs that contribute to overarching mission effectiveness. Studies by the Department of Defense (DoD) indicate future operations may include anti-access/area-denial (A2AD) environments which limit human teleoperator decision-making and control. This research addresses the problem of decentralized vehicle re-routing and task reassignments through consensus-based UAV decision-making. An Integrated Consensus-Based Framework (ICF) is formulated as a solution to the combined single task assignment problem and vehicle routing problem. The multiple assignment and vehicle routing problem is solved with the Integrated Consensus-Based Bundle Framework …

Status Quo Bias And Ambiguity Aversion In Engineers, Christopher L. Brown

Dissertations

Systems engineers routinely engage in exercises, such as a trade studies or Multiple Criteria Decision Analysis processes, to select the best among multiple options. Managers ideally assume that these processes are conducted in a manner that is strictly rational and repeatable. A cognitive bias leading to selection of a sub-optimal choice could then have significant consequences. Research has demonstrated a number of biases in the general population, but these have not been specifically studied in systems engineers. Two such biases are ambiguity aversion and status quo bias. A survey instrument was developed to test for ambiguity aversion and status quo …

The Effect Of Prosody Instruction On Reading Fluency And Comprehension Among Third-Grade Students, Tammy B. Overstreet

Dissertations

Problem

Many students are failing to become proficient readers with current instructional methods used in American schools. Students frequently make improvements in two of fluency’s dimensions, rate and accuracy, but these improvements have not consistently correlated to improvements in reading comprehension, which is the objective of reading. The automaticity plus prosody (APP) model was developed by this researcher from Topping’s deep processing fluency model to explain why teaching and assessing the multiple dimensions of fluency (rate, accuracy, and prosody) improve comprehension. The purpose of this study was to compare students in a private school in a small town in southwestern …

Late Completers : How And Why Non-Traditional Graduate Students Who Exceed Program Timelines Of 10 Years Ultimately Complete The Doctoral Process, Lisa Ann Margerum

Dissertations

Problem. Doctoral completion rates within the U.S. have historically been shown to be within the 50-60% range; in 2008, the completion rate was 56%. Although most who complete their doctorates do so within 10 years or less, there is a small percentage of students who continue their studies beyond the 10-year mark and ultimately graduate. As more non-traditional students enter the PhD pursuit, particularly older students with full-time jobs, family, and other commitments and who enroll in non-traditional programs, it is important to understand what enables some to continue beyond the 10-year mark and still graduate, what influences the elongation …

Relationship Between Involvement In Institutional Activities And Christian Life Commitment Among Undergraduate Students Of A Christian University In Mexico, Esteban Quiyono

Dissertations

Problem

A considerable gap in knowledge exists regarding religious commitment among young people in Mexican Christian colleges, where many institutional resources are invested to foster such commitment. This study attempted to identify the extent to which Christian commitments of undergraduate students in a Mexican Christian university are related to their involvement in institutional activities, influential agents, and selected demographic variables (gender, grade level, place of residence, and field of study).

Method

A descriptive cross-sectional and correlational design was conducted using survey research methodology with a stratified sample of 332 undergraduate students enrolled during the fall term of the 2002-2003 college …

The Relationship Between Attitudes Toward The "No Child Left Behind" Law And Perceived Levels Of Burnout Among Teachers In Berrien County, Michigan, Carmen George

Dissertations

The purpose of this research study was to explore the extent to which variations in the three subscales of the Maslach Burnout Inventory (MBI) are influenced by teachers' attitude toward the No Child Left Behind (NCLB) Act. This study also examined the extent to which years of teaching experience and class size influence differences in reported levels of burnout.

Method: Teacher perception of the NCLB Act and how it contributes to teacher burnout in this study was examined by utilizing two instruments. First was the MBI-ES instrument which captures a three-dimensional profile of burnout: emotional exhaustion, depersonalization, and reduced personal …

Polyaminocarboxylic Acids As Potential Candidates For Trivalent Actinide/Lanthanide Separations, Daniel Stephen Kissel

Dissertations

Nuclear energy, which has historically been considered an alternative energy solution in the United States, is regaining support as an efficient means of energy production. The viability of nuclear energy for the future, however, will remain suspect until issues involving the waste created are fully addressed in the next generation of advanced nuclear fuel cycles. The TALSPEAK process, developed at Oak Ridge National Laboratory, is a classic solvent extraction technique that employs a series of analytical separations in an effort to remove radioactive contaminants from spent nuclear fuel (SNF) and recover uranium in high purity. This separation utilizes a polyaminocarboxylic …

Reporting Methods And Analyses In Higher Education Research: Hierarchical Linear And Ols Regression Models, Kimberly Quandt Fath

Dissertations

This study examined the reporting practices used by higher education scholars to communicate the methods and analyses of studies using hierarchical linear and OLS regression models. The study consisted of three parts: (a) a citation analysis of sources associated with methods of hierarchical linear models, (b) a content analysis of reporting practices associated with studies that used hierarchical linear models, and (c) a content analysis of the arguments and corrections used by scholars who have used OLS regression techniques on nested data. When possible, results were compared to similar research. The data for this research was drawn from Journal of …

Extending Students' Practice Of Metacognitive Regulation Strategies In The Undergraduate Chemistry Laboratory And Investigation Of Pb2+ Binding To Calmodulin With Circular Dichroism And Molecular Dynamics Modeling, Mary Twist Van Opstal

Dissertations

The following dissertation was composed of two projects in chemistry education and benchwork/computational biochemistry. The chemistry education research explored students' practice of metacognitive strategies while solving open-ended laboratory problems when engaged in an instructional environment, the Science Writing Heuristic (SWH), that was characterized as supporting metacognitive regulation strategy use. Through in-depth interviews with students, results demonstrated that students in the SWH environment, compared to non-SWH students, used metacognitive strategies to a greater degree and to a greater depth when solving open-ended laboratory problems. As students engaged in higher levels of metacognitive regulation, their elective use of peers became a prominent …

How Do District Level And Building Level Leaders Collaborate To Implement Mandated Change?, Gwendolyn Zimmermann

Dissertations

This research study examined how school leaders, in particular the associate superintendent of curriculum and a junior high school principal, in the same district collaborated to plan for and implement mandated change. In this research study, the mandated change was that of the State's adoption of the Common Core State Standards for Mathematics.

This study utilized a case study methodology. The case study included one case of an associate superintendent of curriculum for the district and a junior high school principal located in suburban Cook County bounded within the timeframe of August 2012 to October 2013. The district identified had …

Tweeting In The Agora: An Historical Documentary Of Educational Structures And Discourse In Ancient Greece And In Modern Social Media, Jill Maraldo

Dissertations

This dissertation focuses on the systems and structures of formal and informal education in Ancient Greece under the leadership of Socrates, Plato and Aristotle and the systems and structures of education and discourse on social media, specifically on blogs and Twitter. Using historical documentary research methodology of primary and secondary sources, the researcher analyzed, compared and contrasted these systems and structures and examined the implications for today's educational leaders.

The four research questions of this study were:

1. According to select primary sources from 400 B.C.- 322 B.C. (heretofore referred to as ancient times) and historical secondary sources about that …

Perceptions Of Value And Perceived Strengths Of Arts Education During An Age Of Accountability: Conditions And Qualities That Shape A Citizenry - Implications For Leadership, Stephen Tyler Plank

Dissertations

This research examines the perceptions of arts education during periods of educational efficiency and accountability focusing specifically on the arguments made by advocates for the value of arts education within the Chicago area. It is intended to help leaders understand how we can learn from our past through revealing cyclical behaviors that can guide future decisions about how best to lead a school.

This study utilized a mixed methodology of historical documentary with oral history to compare two distinct time periods in education focusing on schools that operated in opposition to the norms of the time. Historical documentary was used …

New Teacher Induction Programs: A Case Study Of An Exemplary School District And How It Prepares Its New Teachers For The Use Of Instructional Technology In The Classroom, David Brian Sherman

Dissertations

This research study examined Generation Y new teachers, the process of new teacher induction, and the most effective methods for providing professional development in instructional technology for Generation Y teachers.

The main research questions for this paper were as follows:

1. What constitutes a high quality new teacher induction program for Generation Y teachers in the area of instructional technology?

2. What recommendations should be made for school districts in order for them to properly train their new Generation Y teachers in the best uses of instructional technology?

3. What are the implications for school leaders?

This was a qualitative …

Fitting Things Together: A Grounded Theory Study Of Clinical Judgment In Nursing, Mary Elizabeth Wilber

Dissertations

Safe and appropriate patient care hinges on the nurse's skill in assessment and interpretation of data to support accurate clinical judgments; however, a review of nursing literature reveals the lack of an empirically derived theory of clinical judgment or methods to teach the skill. Progress has been limited because of the difficulties inherent in measuring cognitive work in complex practice environments, as well as the tendency of nursing authors and researchers to substitute a wide variety of terms for clinical judgment. Knowledge development in any discipline is hampered when terms are not clearly defined and the distinction between related concepts …

Recipe For Resilience: Factors Contributing To Urban African American Males' Post-Secondary Academic Achievement, Melvin Thomas Hargrett

Dissertations

The present research sought greater understanding of and contributes additional insights into supporting the academic success of African American males in urban public high schools and in higher education. The findings based on eight world life interviews of successful African American males from an urban community adds valuable information about the community factors (family, church, schools and community organizations) that contribute to the development of resiliency among African American males. Additionally, the research sought to provide a detailed account of the community wisdom (messages and methods) that informed resilience. Lastly, the transformative nature of resilience was explored in collegiate settings, …

Teacher Impact On Supporting The Parent-Teacher Partnership During The Middle School Years, Karen R. Love

Dissertations

The purpose of this study was to investigate the perceptions and experiences of middle school teachers in supporting parents as they move from traditional forms of parental involvement and towards engagement to support their children as they move into the middle school years of education. The design of this study was qualitative using in-depth interviews of middle school teachers. Bronfenbrenner's bioecological system theory of human development was the theoretical framework for this study to examine the factors influencing the child's development during the middle school years. Participants demonstrated that their perceptions and experiences did impact how they viewed parental involvement …

Andragogy In One Community College: A Study Of Students' Attitudes And Perceptions Toward Reading And Writing Following The Completion Of A Concurrent Acquisition One-Semester Developmental English Course, Michele Murphy Froehlich

Dissertations

The purpose of this study was to explore if student attitudes and perceptions changed toward reading and writing after participation in and completion of a one-semester dual-enrollment mandatory developmental non-credit reading and/or writing course combined with a concurrent acquisition general education three-credit-hour English 101 course.

The subjects were nine voluntary participants in the dual-enrollment Accelerated Learning Program 099 and English 101. The classes were offered in a suburban community college close to a large metropolitan city in the Midwest and taught by the same instructor. A mixed methods approach, that is, descriptive-qualitative/ethnographic was used in this study. Descriptive data were …

Investigating The Biochemical And Catalytic Properties Of Nitrile Hydratases, Salette Martinez

Dissertations

Chemical and pharmaceutical industries make extensive use of amide compounds for the manufacture of commodity chemicals (e.g., acrylamide) and drug intermediates (e.g., nicotinamide). Production of amide compounds is typically achieved by the hydration of nitrile compounds under acidic or basic conditions, high temperatures, and copper catalysts. However, the use of such chemical methods leads to the generation of unwanted by-products and toxic wastes, in addition to low product yields and high production costs. An alternative route for amide production is the use of a natural catalyst, for example nitrile hydratases (NHase, E.C. 4.2.1.84). NHase is a metalloenzyme that efficiently converts …

Biblical Lessons For Educational Leaders: The Servant Leadership Of King David, Apostle Paul, Dr. Joe Hairston, Dr. Tim Markley, Tracy D. Lett

Dissertations

This qualitative research study used the methodology of historical documentation. Primary and secondary sources were gathered alongside of the original sources for Servant Leadership as espoused by Robert Greenleaf in "The Servant as Leader" (1970). The New International Version (NIV) of the Bible will be referenced as a primary source and a host of primary and secondary sources regarding Superintendents Hairston and Markley will be supplied. Throughout this study, Greenleaf's definition and eighteen characteristics of a servant leader will be the framework for interpreting the biblical passages as they relate to the leadership of King David and Apostle Paul, as …

Investigation Of Pharmaceutical Mass Transfer Phenomena Using Molecular Dynamics Simulations, Yi Gao

Dissertations

Molecular dynamics (MD) simulation has been widely used in understanding the physical basis of the structure and function of biological macromolecules. However, its application in pharmaceutical research is still at an early stage. This dissertation attempts to establish the use of MD simulation in studying several important pharmaceutical mass transfer processes. The three-series study included (1) the understanding of drug crystal dissolution at molecular level, (2) the elucidation of an unique mechanism for facile polymorphic transformation of crystalline drugs in solutions, and (3) the determination of drug-polymer interactions at water-crystal interface and the implications to crystallization inhibition.

A drug crystal …

Glycosyl Thiocarbamates As New Building Blocks For Chemical Glycosylation, Sneha Chandrashekhar Ranade

Dissertations

Having multiple functions in biological systems e.g. fertilization, blood group determination, cell growth; carbohydrates have remained attractive subjects for the study. They are also involved in various life threatening biological processes, such as viral and bacterial infections, tumor development, etc. Understanding of these involvements/interactions of carbohydrates in such critical processes is essential for the development of carbohydrate based vaccines and therapeutics. Although carbohydrates are present abundantly in nature, their isolation is cumbersome and low yielding, which is why, the synthesis of carbohydrate units has been of interest to many scientists. Efforts have been made to make these synthetic methods more …

Optical Spectroscopic Studies Of Two Star Forming Regions, Kristen Leilani Erickson

Dissertations

The ρ Ophiuchi and Serpens molecular clouds are sites of low mass star formation. The goals of this study were to identify young stellar objects (YSOs) and estimate ages and masses in order to infer an initial mass function (IMF), investigate disk evolution, and determine the star-forming history. Optical spectroscopic surveys of an unbiased sample of candidate young stars have been completed. Optical images taken in different photometric bands were used to create color-magnitude diagrams from which sources were selected for spectroscopic observation. In combination with published data, 135 association members in ρ Ophiuchi and 63 association members plus 16 …

The Effects Of Standards-Based Grading On Student Performance In Algebra 2, Rachel Beth Rosales

Dissertations

The use of standards-based grading in American public schools is increasing, offering students, parents, and teachers a new way of measuring and communicating about student achievement and performance. Parents indicate an appreciation for this method of grading, and students at the elementary grades (K-6) have improved standardized test scores in reading and math as a result of its implementation. This study seeks to determine whether standards-based grading has the same effect on students at the high school level (grades 9-12) by comparing end-of-course test scores and posttest scores of Algebra 2 students enrolled in a standards-based graded classroom with to …

A Geographical Approach For Integrating Belief Networks And Geographic Information Sciences To Probabilistically Predict River Depth, Nathan Lee Hopper

Dissertations

Geography is, traditionally, a discipline dedicated to answering complex spatial questions. Although spatial statistical techniques, such as weighted regressions and weighted overlay analyses, are commonplace within geographical sciences, probabilistic reasoning, and uncertainty analyses are not typical. For example, belief networks are statistically robust and computationally powerful, but are not strongly integrated into geographic information systems. This is one of the reasons that belief networks have not been more widely utilized within the environmental sciences community. Geography’s traditional method of delivering information through maps provides a mechanism for conveying probabilities and uncertainties to decision makers in a clear, concise manner. This …