Digital Commons Network^™

Ignition Mechanism In Nanocomposites Thermites, Rayon Williams

Dissertations

Nanocomposite thermites (n-thermites) have been actively investigated for a wide range of potential applications including propellants, explosives, and pyrotechnics. There have been several recent efforts aimed at understanding ignition mechanisms of nanocomposite reactive materials. Although significant progress has been made, ignition mechanisms remain elusive. At the same time, a robust ignition model is required to incorporate these materials in practical energetic formulations. A challenge of this effort is to describe the mechanisms of ignition of n-thermites prepared by Arrested Reactive Milling (ARM) with different stimuli, including heat, spark and impact and also develop a multi-step kinetic model describing different processes …

Intent-Based User Segmentation With Query Enhancement, Wei Xiong

Dissertations

With the rapid advancement of the internet, accurate prediction of user's online intent underlying their search queries has received increasing attention from the online advertising community. As a rich source of information on web user's behavior, query logs have been leveraged by advertising companies to deliver personalized advertisements. However, a typical query usually contains very few terms, which only carry a small amount of information about a user's interest. The tendency of users to use short and ambiguous queries makes it difficult to fully describe and distinguish a user's intent. In addition, the query feature space is sparse, as only …

Slide To Unlock: Creating A Technology-Integrated Environment For Our Students, Matthew J. Fuller

Dissertations

The focus of this study is to explore how to support teachers in capitalizing on students’ technology skills, experiences, and preferences to offer enhanced teaching and learning experiences in school. Using a framework developed by Wagner et al. (2006), technology integration is systemically examined in terms of “4 Cs:” context, culture, conditions, and competencies to construct an “As-Is” picture of a school district based upon current realities. Next, a series of changes are proposed and the 4 Cs are used to describe the “To-Be” picture of the organization at the end of the proposed change journey. The three teachers who …

Tap The Screen: Technology Integration In Our Students’ Lives, Matthew J. Fuller

Dissertations

The focus of this study is to document and describe the integration of technology in the everyday lives of students in Grades 3–8 attending a high-performing public school district in an affluent Chicago suburb. The following research questions guide this study:

• How do students in Grades 3–8 integrate technology into their lives?
• What are the implications of students’ technology integration for teaching and learning?
• How can teachers capitalize upon students’ technology integration in ways that inform instructional practice?

A review of the literature presents related information in areas that explore the increasingly digital world of our students; curriculum, instruction, and …

New Methods And Strategies For Orthogonal Oligosaccharide Synthesis, Scott James Hasty

Dissertations

Although scientists have been able to isolate certain classes of naturally occurring carbohydrates, the overall availability of pure natural isolates remains inadequate. As a result, chemical synthesis has been employed to access complex carbohydrates. Unfortunately, traditional oligosaccharide synthesis often requires laborious protecting-group manipulations that results in lower yields. Expeditious strategies effectively shorten the task of oligosaccharide assembly by minimizing the need for protecting-group manipulations between glycosylation steps, or even purification of the intermediates. Additionally, prediction of the stereoselective outcome of the coupling reaction between two sugar units is a major obstacle facing carbohydrate chemists. It is well known that 1,2-trans …

Selecting The Best Supply Chain Strategy: When Is A Misalignment Of Product Type And Strategy Appropriate, How Do Changes In Expected Demand Impact Strategies, And Should The Strategy Of A Product Change Over Its Life-Cycle?, William Ellegood

Dissertations

To reduce the total cost of delivering a product to the marketplace, many firms are going beyond the walls of their organization and working with suppliers and customers to implement supply chain management (SCM). Fisher (1997) presented a conceptual model contending that the demand characteristics and supply chain strategy (SCS) of a product should be aligned for SCM to be successful. This dissertation presents an original analytical model of a three echelon supply chain to demonstrate under various supply chain conditions that a “misalignment” between demand characteristics and SCS can result in a lower total supply chain cost. In addition …

Training Teaching Assistants Across The Curriculum: A Study Of The Certificate In University Teaching (Cut) Program, Carolyn I. Brown

Dissertations

This action research dissertation examines the development over nine semesters of a 15-hour certificate in higher education teaching that is geared toward developing Teaching Assistants (TAs) across disciplines. The dissertation builds on the Preparing Future Faculty (PFF) models. This research is informed by both social constructivist theory and social cognitive theory, and consists of personal narratives from my multiple roles within the Certificate in University Teaching (CUT) program as well as voices of CUT participants from interviews and reflective journals. Data sources also include teaching and program observations, curriculum documents, and teaching syllabi. I locate myself as both insider and …

The Investigation Of Self-Determination In Students Participating In Higher Education With An Invisible Disability, Joseph Daniel Bryant Ii

Dissertations

The enrollment of students with invisible disabilities has continued to increase unabated in postsecondary environments. As a result of the applicable laws governing the provision of accommodations and/or modifications in higher education, the impetus and responsibility to succeed rests almost entirely with the individual student. Research showed for many students with invisible disabilities, the transition from a more passive role in the acquisition of education at the primary and secondary levels to a more active role in the acquisition of higher education at the post-secondary level was difficult, as evidenced by a large percentage of such students failing to complete …

The Long-Term Impact Of Preschool Education On Student Achievement, Amy L. Britt

Dissertations

While many studies have been published about the short-term effects of preschool on student achievement, few long-term studies have been completed. The focus of this study was to determine whether students who attended schools that offered preschool demonstrated improved student achievement in communication arts and math in fourth and eighth grades. Quantitative data, including MAP scores for 2010, 2011 and 2012 in communication arts and math, were reviewed. The participants included rural schools with similar demographics as evidenced by membership in Missouri Association of Rural Education. A survey was administered to superintendents of the same schools. The data revealed that …

Renormalization And ∗-Product Of The Horseshoe Maps, Barakah Jaber Almarri

Dissertations

The aim of this paper is to find the renormalization and star-product of the horseshoe maps. And to prove that the star-product of two horseshoe admissible pairs is a horseshoe admissible pair. Then to find the relationship between the zeta function of the star-product of two L(n, m) admissible pairs and the zeta function of the originals.

Engineering, Teaching, And Technology: A Nationwide Assessment Of Instructional Internet Use By Engineering Faculty, Alexander Lehman Phd

Dissertations

There has been an explosion of internet use among college students over the last decade for at least two important reasons: the proliferation of available resources and the arrival of a digital native generation to university campuses. Not surprisingly, engineering students are entering undergraduate programs possessing a much different skill set than previous generations, which has led to a decline in the popularity of traditional engineering pedagogy. Numerous conceptual models have been developed in the field of instructional technology, as researchers have attempted to classify and effectively integrate new technology practices into 21st century educational contexts. One of the most …

Comparison Of Hazard, Odds And Risk Ratio In The Two-Sample Survival Problem, Benedict P. Dormitorio

Dissertations

Cox proportional hazards is the standard method for analyzing treatment efficacy when time-to-event data is available. In the absence of time-to-event, investigators may use logistic regression which only requires relative frequencies of events, or Poisson regression which requires only interval-summarized frequency tables of time-to-event. When event frequencies are used instead of time-to-events, does it always result in a loss in power?

We investigate the relative performance of the three methods. In particular, we compare the power of tests based on the respective effect-size estimates (1)hazard ratio (HR), (2)odds ratio (OR), and (3)risk ratio (RR). We use a variety of survival …

Urban School Counseling Impact: An Aba Reversal Single Subject Time-Series Analysis Of Academic, Suspension, And Attendance Data, Katherine L. N. Colles

Dissertations

While there is a dearth of longitudinal outcome research on comprehensive school counseling program impact (Carey & Dimmitt, 2006; Carey, Dimmitt, Hatch, Lapan, & Whiston, 2008; Gysbers, 2001; Whiston, 2002) on indicators of importance to school systems (Borders, 2002; Lapan, 2001), school counseling research primarily studies program components (Borders, 2002; Herr, 1979; Whiston, 2002; Whiston & Sexton, 1998) and component outcomes (Hughes & James, 2001; Schmidt, 1984, 2000; Sink, 2002). Grounded in a historical review of the school counseling field and pertinent related research, this research investigated the school counseling program impact of one kindergarten through eighth grade urban school …

Evaluating The Use Of The Math Reasoning Inventory For Improvement In Fraction Instruction, Kathy Huffman Boyer

Dissertations

In an attempt to close the mathematic achievement gap between students from the United States and students from other countries, a new national set of standards, the Common Core State Standards for Mathematics, was developed and adopted by the state of Michigan in 2010. These standards emphasize mathematical reasoning and application, rather than the previous emphasis on performing calculations. Unfortunately, teachers generally have had little training in how to assess students’ mathematical reasoning, how to teach mathematical reasoning, or how to provide remediation to those students who show need. The purpose of this study was to see if use of …

The Effects Of Writing Centers Upon The Engagement And Retention Of Developmental Composition Students In One Missouri Community College, David Elton Ball

Dissertations

Student retention poses a major challenge to higher education in America. Research has demonstrated colleges that foster student engagement have higher retention rates than colleges that fail to do so. Writing centers are student services that improve student engagement and retention. This study focused upon the Fall 2013 cohort of developmental composition students in one Missouri community college, to determine if students’ use of the writing center made a positive difference upon student engagement or successful completion of their course. The study was designed with a two-pronged approach to answer four questions. The first question was posed to determine a …

The Experiences Of Women In Post Graduate Physics And Astronomy Programs: The Roles Of Support, Career Goals, And Gendered Experiences, Ramón S. Barthelemy

Dissertations

In physics and astronomy the low representation of women is obvious at every stage of the educational pathway from undergraduate students to full professors. These low numbers perpetuate themselves by failing to create new mentors to foster the next generation of women. Women and men also have different experiences as they traverse into physics and astronomy careers. Women often experience chilly climates, discrimination, and challenges coordinating the demands of young families with their careers. In the literature exploring this topic, little focus is put on the experiences of women graduate students in physics and no focus is put on women …

Integrating 3d Layered Manufacturing With Photonic Sintering, Precision Machining And Smart Coating Techniques For Rapid Casting Applications, Hemant Bohra

Dissertations

Developments in rapid casting technologies have led to a new era of inclusion of 3D printing. Three-Dimensional (3D) printing provides the flexibility and ease of reproducing a sand mold directly from CAD models, eliminating patterning steps, thus reducing the process time for creating prototypes. In addition to minimizing processing steps, 3D printing provides the advantages of higher precision and the ability to produce complex shaped sand molds, but it simultaneously possesses some limitations and concerns related to throughput, safety and logistics.

This study proposes an alternative method for creating sand molds by introducing a hybrid rapid prototyping approach to overcome …

Instructional Change In Academic Departments: An Analysis From The Perspective Of Two Environment-Focused Change Strategies, Kathleen M. Quardokus

Dissertations

Numerous reports demand changes in college and university teaching practices. This is especially true for science, technology, engineering and mathematics (STEM) disciplines. STEM stakeholders are concerned about student retention within STEM majors, as well as the lack of sufficient graduates with the knowledge to advance these fields. A common conclusion of these reports is that teaching practices must change. Although these calls for change have occurred for decades, STEM fields have yet to experience widespread change. Thus, there is a need for more effective change strategies. Recently, researchers have suggested that effective change strategies should focus on changing the environments …

Eliciting Elementary School Students’ Informal Inferential Reasoning Through Storytelling, Dustin Owen Smith

Dissertations

One growing area of research on statistical learning is Informal Inferential Reasoning (IIR). Makar and Rubin (2009) describe IIR as having three components: making and evaluating inferential claims, supporting claims explicitly with data, and attending to the inherent uncertainty present in statistical inference-making. This dissertation study was built around developing a method for providing opportunities for elementary school students (Grades K, 2, and 4) to engage with IIR within the context of stories and storytelling through a method called Storytelling-Questioning. After interacting with and discussing two separate stories, it was found that students of each grade level were able to …

Career And Technical Education And The Malcolm Baldrige Quality Award In Education, Patricia Crum-Allen

Dissertations

This study examined Career and Technical Education (CTE) Centers in the State of Michigan and their potential alignment with the Malcolm Baldrige Quality Award in Education. CTE center leaders and their faculty were asked to provide their perceptions of how well their organizations meet Baldrige quality elements, using a version of the Baldrige Assessment Tool. The study further queried CTE center leaders and their faculty with regard to quality awards received and their desire to pursue an external quality award. Differences between CTE leaders and faculty responses were explored.

This study was quantitative in design using survey research to gather …

The Learning Pathways Of Ironman Triathletes: Case Studies Of Age-Group Ironman Triathletes, Ari Zelmanow

Dissertations

The Ironman Triathlon is an epic endurance event consisting of a 2.4-mile swim, a 112-mile bike ride, and a 26.2-mile run. There is paucity in the literature relating to how athletes learn how to negotiate this event. This qualitative study was conducted over a 9 month period, to align with the 2013 Ironman training and racing season. Seven athletes were selected for participation in the study. Utilizing a case study approach, the Ironman athletes’ learning pathways were examined through in-depth interviews and audio and video content personally captured by the participants. The learning pathways revealed the athletes initially learned through …

Multi-Sensory Emotion Recognition With Speech And Facial Expression, Qingmei Yao

Dissertations

Emotion plays an important role in human beings’ daily lives. Understanding emotions and recognizing how to react to others’ feelings are fundamental to engaging in successful social interactions. Currently, emotion recognition is not only significant in human beings’ daily lives, but also a hot topic in academic research, as new techniques such as emotion recognition from speech context inspires us as to how emotions are related to the content we are uttering.

The demand and importance of emotion recognition have highly increased in many applications in recent years, such as video games, human computer interaction, cognitive computing, and affective computing. …

Summer School Correlation To Reading Lexile Levels Of African American Students In A Low Socio-Economic Area In Grades One Through Four, Channie Bell

Dissertations

The achievement gap between African American students and other races was continuously widening. School districts across the country were examining several programs to address the issue. This study attempted to examine the overall benefit of summer school attendance on reading achievement. It evaluated the relationship between summer school attendance and lexile levels of African American students from a low socio-economical area, in grades one through four. Participants for the study were not recruited as secondary data was used for the research. The study site school district’s secondary data from the summer school session of 2012 was analyzed. The data included …

Development And Applications Of The Expanded Equivalent Fluid Method, Bharath Kumar Kandula

Dissertations

Ocean acoustics is the study of sound in the oceans. Electromagnetic waves attenuate rapidly in the water medium. Sound is the best means to transmit information underwater. Computational numerical simulations play an important role in ocean acoustics. Simulations of acoustic propagation in the oceans are challenging due to the complexities involved in the ocean environment. Different methods have been developed to simulate underwater sound propagation. The Parabolic-Equation (PE) method is the best choice in several ocean acoustic problems. In shallow water acoustic experiments, sound loses some of its energy when it interacts with the bottom. An equivalent fluid technique was …

Teacher Expectations Of Students In A Predominantly African American School District, Durand Duron Payton

Dissertations

Wong and Wong (2004) reported teachers‟ perceptions could become a self-fulfilling prophecy when addressing the students. According to Haycock (2001) once teachers‟ perceptions had developed, even if they were inaccurate, teachers would begin to act as if their beliefs were factual. By acting as though the beliefs were real, teachers could essentially cause their perceptions to materialize into the expectations of students. The purpose of this study is to explore teachers‟ expectations of students in a predominantly African American school district. Ferguson (1998) had considered the behaviors in which teachers' perceptions of the students‟ impact their expectations towards the students. …

Comparing Professonal Development Practices Of Low Performing Public Schools And High Performing Public Schools In The State Of Mississippi, Lori Rogers Wilcher

Dissertations

This study was designed to investigate the professional development practices of public schools in Mississippi. More specifically, the causal comparative design sought to discover if there were differences in professional development practices between low-performing public schools in Mississippi and high-performing public schools in Mississippi. For the purposes of this study, high-performing schools were classified A or B and low-performing schools were classified D or F by the Mississippi Department of Education. Classifications were based on student performance measures from the statewide testing system for the 2012-2013 school year.

The review of literature guided the examination of differences in perceived value …

Fundamental Investigations Of Clay/Polymer Nanocomposites And Applications In Co-Extruded Microlayered Systems, Jeremy John Decker

Dissertations

The second and fourth generations of hydroxylated dendritic polyesters (HBP2, HBP4) were combined with unmodified sodium montmorillonite clay (Na+MMT) in water to generate a broad range of polymer clay nanocomposites from 0 to 100% wt/wt Na+MMT. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to investigate intercalation states of the clay galleries. It was shown that interlayer spacings were independent of generation number and changed over the composition range from 0.5 nm to 3.5 nm in 0.5 nm increments that corresponded to a flattened HBP conformation within the clay tactoids.

The HBP4/Na+MMT systems were investigated to study the …

Modeling That Leads To The Prediction Of Photocatalytic Coatings Characterization, Biju Bajracharya

Dissertations

One of the abundant sources of energy on earth is a solar energy which is the clean and safest energy source. It is also known as universal energy, the most important source of renewable energy available today. On realizing that the light source has a crucial role in daily life, several scientists and researchers from centuries ago have studied to establish photo induced systems and utilized them. Long after the knowledge of thermal energy, photovoltaic energy, and photosynthesis in plants, two prominent scientists, Fujishima and Honda, have discovered the electrochemical photolysis of water with the Titanium dioxide electrode which was …

Principal Emotional Intelligence And Teacher Perceptions Of School Climate In Middle Schools, Ashley Dawn Meadows Allred

Dissertations

The purpose of this study was to determine the correlational relationship of principals’ emotional intelligence on the perceptions that teachers have of a school’s climate. The Organizational Health Inventory for Middle Schools (OHI-M) served as the assessment for teachers’ perceptions of the school climate or the overall health of the organization. Principals’ emotional intelligence competencies were assessed using the Mayer Salovey-Caruso Emotional Intelligence Test version 2, hereinafter referred to as the MSCEIT V.2.0. Participants of the study included 22 principals of public middle schools in Mississippi. There was an average of 45 teachers employed at each middle school.

A Pearson …

Evaluating The Use Of Tootling For Improving Upper Elementary/Middle School Students' Disruptive And Appropriate Behavior, Abigail Melanie Lambert

Dissertations

The purpose of the current study was to extend the literature on a positive peer reporting procedure called Tootling. There has been limited research on the effectiveness of the Tootling intervention for reducing disruptive behavior in the classroom (Cihak, Kirk, & Boon, 2009; Lambert, 2012). Additionally, Tootling has primarily been utilized with lower elementary school students, and the present study evaluated the intervention procedures with upper elementary/middle school students (i.e., sixth and seventh grades). The current study also examined the effects of the Tootling intervention on individual target students referred for disruptive behavior in addition to classwide student behavior. An …