Digital Commons Network^™

Biomechanical Loading Changes Between Species In Mild Blast-Induced Traumatic Brain Injury, Jose Juan Rodriguez

Dissertations

Blast-induced traumatic brain injury (bTBI) has become one of the leading injury modalities in military personnel and is considered a signature injury in veterans returning from conflicts in the Middle East. One of the main concerns in studying bTBI is translating animal experiments to clinical applications that can service veterans. Significant advances have been made using animal models in relating external shock waves to emerging neuropathophysiological and behavioral outcomes. However, it is unknown if these results are applicable to humans; and if so, can an interspecies transfer function be developed based on size, shape, and material response. This work aims …

Towards Practical Homomorphic Encryption And Efficient Implementation, Gyana R. Sahu

Dissertations

Cloud computing has gained significant traction over the past few years and its application continues to soar as evident from its rapid adoption in various industries. One of the major challenges involved in cloud computing services is the security of sensitive information as cloud servers have been often found to be vulnerable to snooping by malicious adversaries. Such data privacy concerns can be addressed to a greater extent by enforcing cryptographic measures. Fully homomorphic encryption (FHE), a special form of public key encryption has emerged as a primary tool in deploying such cryptographic security assurances without sacrificing many of the …

Microglia Induced Neuroinflammation Through The Nlrp3 Inflammasome Following Blast Traumatic Brain Injury, Daniel Younger

Dissertations

The incidence of traumatic brain injury (TBI) among military personnel have been steadily increasing with modern conflicts. A recent RAND report estimated 320,000 service members, totaling 20% of deployed forces, suffer from TBI. However, of this population roughly 60% have not seen a medical professional specifically for TBI. Unlike the civilian population, the primary cause of TBI for active-duty military personnel is blast exposure. Blasts now account for over 70% of all US military casualties in operation Iraqi Freedom (OIF) and Operation enduring freedom (OEF) and are the major cause of TBI. Among many pathological mechanisms associated with blast TBI, …

Flare Emission Observed In High Resolution And Comparison With Numerical Modeling, Nengyi Huang

Dissertations

As one of the most intense activities on the solar surface, flares have been extensively observed and studied ever since the first report. The standard model of solar flares has been established and commonly accepted. However, many limitations from the researching tools have left some of the problems unsolved or controversial. For example, the density of electrons in the corona is lower than it is required to activate the observed emission in HXR, and the mechanism that these electron beams can penetrate down to lower chromosphere is unclear. Many theoretical scenarios were suggested, and more observations had been in need. …

The Construction Of Student Mathematical Identity And Its Relationship To Academic Achievement, Ann Trescott

Dissertations

The California university and state college systems (UC and CSU) are committed to accepting a diverse student body. Although there has been some growth in the percentage of minority students admitted each year, a low number of minority and socioeconomically disadvantaged students meet minimum entrance requirements. For example, in 2018, only 33% of socioeconomically disadvantaged African American students and 39% Hispanic/Latinx students who graduated from California public high schools met minimum UC/CSU requirements (CDE, 2019).

Explanations for ineligibility include the fact that many high school students have not completed the requisite mathematics classes due in part to the inequitable practice …

Accurate Patient Health Condition Identification And Risk Prediction From Health Data, Jinhe Shi

Dissertations

Online Health communities (OHCs), Electronic Health Records (EHRs) and Claims data contain rich patient information. Accurate identification of patient's health conditions is critical for providing effective and safe health care service and for trustable knowledge discovery. This dissertation proposes several deep-learning based techniques on identifying patient health conditions and predicting adverse drug event (ADE) risks using various health data.

First, this dissertation presents a novel patient experience mining model to differentiate the data expressing user experiences from the one describing hearsays. Indeed, OHCs contain information with varying degrees of quality. Identifying information that describes patient health experience from OHCs is …

Error Correction For Asynchronous Communication And Probabilistic Burst Deletion Channels, Chen Yi

Dissertations

Short-range wireless communication with low-power small-size sensors has been broadly applied in many areas such as in environmental observation, and biomedical and health care monitoring. However, such applications require a wireless sensor operating in "always-on" mode, which increases the power consumption of sensors significantly. Asynchronous communication is an emerging low-power approach for these applications because it provides a larger potential of significant power savings for recording sparse continuous-time signals, a smaller hardware footprint, and a lower circuit complexity compared to Nyquist-based synchronous signal processing.

In this dissertation, the classical Nyquist-based synchronous signal sampling is replaced by asynchronous sampling strategies, i.e., …

Instructional Coaching: Perceptions Of Midwest Building Principals And Instructional Coaches, Mary Jean Hall

Dissertations

Instructional coaching has gained popularity with school districts to improve teachers’ instructional strategies, and students’ academic performance. Current research supports the use of instructional coaching for schoolwide improvements; however, researchers suggest research is needed regarding the training and support of instructional coaches. Different coaching models are in use today and research into the best coaching framework for effective instructional coaching is needed. This study was conducted to investigate the perceptions of instructional coaches regarding their preparedness when entering the instructional coaching position, the professional development and support offered by school districts to coaches, and whether there is a need for …

Principal And Teacher Perceptions Of Classroom Walkthroughs In Middle School Settings, Ethel Shanklin

Dissertations

There is no question that education is paramount to student success. The goal of No Child Left Behind (NCLB, 2001), did not work. The last revision of this act, the Every Students Succeeds Act of 2016 is now being implemented, Educators are yet struggling for the panacea that is effective for all students’ competencies in the world. Students from low socio-economic areas are at a greater risk of their educational needs not being met for various reasons. There is the opportunity to reach students in schools in spite of their home situations. Instruction begins and ends with instructional leaders in …

Studies Of Two-Phase Flow With Soluble Surfactant, Ryan Peter Atwater

Dissertations

Numerical methods are developed for accurate solution of two-phase flow in the zero Reynolds number limit of Stokes flow, when surfactant is present on a drop interface and in its bulk phase interior. The methods are designed to achieve high accuracy when the bulk Péclet number is large, or equivalently when the bulk phase surfactant has small diffusivity

In the limit of infinite bulk Péclet number the advection-diffusion equation that governs evolution of surfactant concentration in the bulk is singularly perturbed, indicating a separation of spatial scales. A hybrid numerical method based on a leading order asymptotic reduction in this …

The Impact Of Direct Instruction At English Learner Instructional Sites Compared To Indirect Instruction At English Learner Support Sites, Lauren Shim

Dissertations

Approximately one in every ten public school students in the United States is considered an English learner (Sanchez, 2017). It has also been determined that the English learner population is one of the fastest-growing populations in the United States (Gibson, 2016). This study focused on a school district in the Midwest region of the United States, where approximately 4% of the student population was classified as English learners, and the population had been steadily growing since 2014 (School District Manual, 2019). This Midwestern school district offered a unique English learner program by transporting students to specific Instructional Sites for English …

Perceptions Of Elementary School Support Staff Of Their Role In Supporting The School Mission Statement, Matthew Dean

Dissertations

School district mission statements are intended to be unifying declarations that set a tone and direction for organizations and provide a unifying motivator for the individuals who serve those organizations (Rey, 2017). School district mission statements should be created and articulated in a manner that can be understood and followed by certified administrators and teachers, as well as classified personnel such as district support staff (Lynch, 2016). Without adequate articulation, school district mission statements can fall short of providing guidance and motivation to every employee in the district (Rey, 2017). This qualitative study was initiated to gain the perceptions of …

Disparities In Health Care For The Transgender Population, Shannon Crowe

Dissertations

Individuals identifying as transgender, gender nonconforming, or those born with differences of sex development from societal norms have specific healthcare needs. These individuals experience disparities in healthcare treatment as a result of a lack of cultural competence, stereotypes, and personal bias among healthcare professionals. Despite being inclusive of all patients and acceptance of cultural beliefs, many organizations fall short of being inclusive when caring for transgender or gender nonconforming patients. Front line healthcare workers can have a positive impact on the psychological and physical care delivered to transgender patients; thus, setting the stage for a patient of a minority having …

A Study Of Information Bots And Knowledge Bots, Amartya Hatua

Dissertations

In this dissertation, a study of different aspects of information bots and knowledge bots is done. The research contributes to a better understanding of the various characteristics of information bots as well as the different patterns and factors responsible for the information diffusion in a social network. This research also shows how these factors can be used to predict information diffusion for a particular topic in a social network. The second part of the research is focused on strategies for improving the knowledge base of knowledge bots, where two different approaches are studied. In the first approach, knowledge is transferred …

Watching Disability: A Discourse Analysis Of Representations Of Disabled Characters In Scripted Television Programs, Wilbur Martin

Dissertations

This dissertation is a discourse analysis of three television series, Speechless, Atypical, and Breaking Bad. A close reading of those series was performed to analyze the representations of disability in those television series and whether those representations enforced classic stereotypes or differed from those classic stereotypes for disabilities. The representations were also analyzed to see if those representations enforced the medical or social model of disability.

All three series had instances of stereotypical representations as well as representations that were not stereotypical. All three series representations identified with the medical and social model of disabilities. Series that …

The Principal And Teacher Evaluation: A Study Of Influencing Pressures, Andy Brock

Dissertations

This quantitative study focused on determining the amount of influencing pressure principals encountered during summative teacher evaluations, determining if there was a relationship between the pressures a principal experienced while completing a summative teacher evaluation and the summative evaluation score teachers received, and determining if there was a relationship between teacher evaluation scores and district accountability levels. A survey instrument was created containing 23 possible influencing pressures derived from a literature review along with 14 items for the purpose of collecting demographic data from each participant. The survey instrument used a horizontal numeric scale to measure the amount of influencing …

Teacher Beliefs And The Intent And Current Use Of Movement As It Influences Students With And Without Adhd, Kimberly Mcquagge

Dissertations

The purpose of this study was to add to the knowledge base regarding utilizing movement in the classroom as it influences reading and mathematics achievement for students with and without Attention-Deficit Hyperactivity Disorder. Mississippi public school teachers (n= 379) responded to an online questionnaire that gathered demographic data and collected ratings based on teacher beliefs and both their current use of movement and intent to use movement in the classroom based on a 5-point Likert scale.

In order to predict if a relationship existed between teacher beliefs of utilizing movement in the classroom and both their current use of movement …

Reconstructing Single-Cell 3d Genome Structures Based On Lennard-Jones Potential, Mengsheng Zha

Dissertations

Reconstructing 3D chromosomal structures based on single-cell Hi-C data is a challenging scientific problem due to the extreme sparseness of the single-cell Hi-C data. In this research, we used the Lennard-Jones potential to reconstruct both 500 kb and highresolution 50 kb structures for chromosomes based on single-cell Hi-C data. A chromosome was represented by a string of 500 kb or 50 kb DNA beads and put into a 3D cubic lattice for simulations. A 2D Gaussian function was used to impute the sparse singlecell Hi-C contact matrices. We designed a novel loss function based on the Lennard-Jones potential, in which …

A 3d Image-Guided System To Improve Myocardial Revascularization Decision-Making For Patients With Coronary Artery Disease, Haipeng Tang

Dissertations

OBJECTIVES. Coronary artery disease (CAD) is the most common type of heart disease and kills over 360,000 people a year in the United States. Myocardial revascularization (MR) is a standard interventional treatment for patients with stable CAD. Fluoroscopy angiography is real-time anatomical imaging and routinely used to guide MR by visually estimating the percent stenosis of coronary arteries. However, a lot of patients do not benefit from the anatomical information-guided MR without functional testing. Single-photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) is a widely used functional testing for CAD evaluation but limits to the absence of anatomical information. …

Machine Learning Approaches For Improving Prediction Performance Of Structure-Activity Relationship Models, Gabriel Idakwo

Dissertations

In silico bioactivity prediction studies are designed to complement in vivo and in vitro efforts to assess the activity and properties of small molecules. In silico methods such as Quantitative Structure-Activity/Property Relationship (QSAR) are used to correlate the structure of a molecule to its biological property in drug design and toxicological studies. In this body of work, I started with two in-depth reviews into the application of machine learning based approaches and feature reduction methods to QSAR, and then investigated solutions to three common challenges faced in machine learning based QSAR studies.

First, to improve the prediction accuracy of learning …

A Qualitative Investigation Of Andragogy In Adult Bible Classes In Lutheran Church — Missouri Synod Congregations In St. Louis, Peter Luther Jurchen

Dissertations

This qualitative study explored what changes, if any, would occur in Lutheran Church–Missouri Synod (LCMS) Bible classes after pastors participated in training that focused on implementing andragogical teaching methods in their Bible classes. The researcher sought to examine Andragogy in its relationship to adult Christian education, specifically in Sunday adult Bible classes. Also, in order to better understand the impact of andragogy in the specific contexts of the study, the researcher investigated the relationship between andragogical principles and LCMS doctrinal positions. Andragogical principles used in this study were derived, broadly conceived, from Malcomb Knowles’s Six Assumptions and Eight Processes of …

Student Perceptions Of Their Undergraduate Science Laboratories, Eva N. Nyutu

Dissertations

The science laboratory learning environment has been a distinctive area in science education since the 19th century. The science laboratory environment has been examined extensively at the high school level using the Science Laboratory Environment Inventory (SLEI). There are, however, very few studies about the science laboratory environment done at the college level. An instrument that may be helpful for college instructors is one that assesses the degree to which students perceive the laboratory as intended by their science instructors. An examination of the literature indicated that there are no validated and reliable instruments for measuring student perceptions of what …

Establishing Auditory Discrimination And Echoic Stimulus Control With An Auditory Matching Procedure, Clare Christe

Dissertations

A generalized auditory matching repertoire is considered an early milestone in the development of verbal behavior (Greer & Keohane, 2006). Previous literature has demonstrated that the auditory matching (AM) protocol can improve echoics in individuals with developmental delays (Brown, 2005; Choi, Greer & Keohane, 2015; Du, Speckman, Medina, & Cole-Hatchard, 2017). However, some children experience difficulties with the match-to-sample (MTS) format of the AM protocol, if they are unable to perform delayed MTS tasks.

One alternative to MTS is the go/no-go procedure (Serna, Dube, & McIlvane, 1997), which requires the student to make a simple discrimination (i.e., same/different) between two …

Software Quality Control Through Formal Method, Jialiang Chang

Dissertations

With the improvement of theories in the software industry, software quality is becoming the most significant part of the procedure of software development. Due to the implicit and explicit vulnerabilities inside the software, software quality control has caught more researchers and engineers’ attention and interest.

Current research on software quality control and verification are involving various manual and automated testing methods, which can be categorized into static analysis and dynamic analysis. However, both of them have their own disadvantages. With static analysis methods, inputs will not be taken into consideration because the software system isn’t executed so we do not …

Essays On Climate Change-Related Extreme Events, Alvin E. Harris

Dissertations

There are increasing and urgent calls for global economies to join in the fight against the impacts of climate change (World Bank, 2020). With reports such as the World Bank (2020) of climate change costing billions of dollars in losses for economies, the purpose of my dissertation is to examine the effects of climate change-related extreme events and their potential economic effects in three areas: agriculture, migration, and the labor market.

My first essay focuses on the factors that influence farmers’ perception of risk and adaptive strategies against the effects of climate change-related extreme events. I examine whether farmers’ social …

A Comprehensive Security Approach On Data Race Detection And Deepfake Defense, Yu Guo

Dissertations

In the past decades, even the computer techniques have a significant improvement. The topic about security will be never out of date.

To meet with the requirement of computation, the number of CPU cores has changed from single core to multi-cores. At the same time, the multi-thread programs are also proposed to maximize the advantages of multi-core computing power. While even the performance has been improved, but it also brings some new issues which were never happened on sequential programs called current bugs. Data race is a major type of current bugs, it is happened when multiple threads access the …

Counselor Education Doctoral Students’ Experiences As Developing Gatekeepers, Diana Charnley

Dissertations

This phenomenological study sought to understand and describe the gatekeeping experiences of counselor education doctoral students and enumerate key influences in their learning and development. A national sample of 75 doctoral students responded to the descriptive pre-screening survey, and a sub-sample of 15 completed semi-structured interviews. Using interpretative phenomenological analysis, two overarching or meta-themes and five main themes were identified pertaining to how doctoral students view their role as gatekeeper and how they learn and experience gatekeeping. Meta-themes included doctoral students feeling “in the middle”, especially between faculty and master’s students, and how they are working to address these uncertainties, …

Maia And Admonita: Mandatory Integrity Control Language And Dynamic Trust Framework For Arbitrary Structured Data, Wassnaa Al-Mawee

Dissertations

The expansion of attacks against information systems of companies that operate nuclear power stations and other energy facilities in the United States and other countries, are noticeable with potential catastrophic real-world implications. Data integrity is a fundamental component of information security. It refers to the accuracy and the trustworthiness of data or resources. Data integrity within information systems becomes an important factor of security protection as the data becomes more integrated and crucial to decision-making. The security threats brought by human errors whether, malicious or unintentional, such as viruses, hacking, and many other cybersecurity threats, are dangerous and require mandatory …

Investigating Newly Discovered Oscillation Modes In Magnetically Shielded Hall Effect Thrusters Utilizing High Speed Diagnostics, Matthew Joseph Baird

Dissertations

Magnetically shielded Hall effect thrusters (MSHETs) are a variant of Hall effect thrusters (HET) that provide the favorable thrust-to-power ratio and high specific impulse of traditional stationary plasma type (STP) HETs but with an extremely long lifetime. MSHETs exhibit unique discharge plasma oscillations compared to traditional unshielded HETs. In this study, measurements of plasma oscillations in the state-of-the-art 12.5 kW Hall Effect Rocket with Magnetic Shielding (HERMeS) were obtained at various discharge voltages while holding other operation parameters constant. Data were collected using high-speed imaging, voltage, current, and plasma probes. The thruster exhibits two dominant oscillation modes within the discharge …

Recidivism Rates And Its Correlation To Mathematics And Reading Comprehension Among Detention Center Juveniles Who Participate In Trauma Informed Teaching, Isaac Collin

Dissertations

In this study rates of recidivism and their relationship with mathematics and reading comprehension will be analyzed. In the literature, a full comprehensive study of high school mathematics and reading was taught without the implementation of a watered-down academic curriculum. In order for detention center students to benefit from a detention center education they need instructors to expose them to state academic standards. The research questions guiding this study included 1) Is there a significant difference in the achievement scores in mathematics and reading skills and abilities based on the rates of recidivism at XYZ Detention Center, 2) Do XYZ …