Digital Commons Network^™

Population Genetic Structure Of Bobcats (Lynx Rufus) In South Dakota: Using Harvested Samples To Inform Management, Stuart C. Fetherston

Electronic Theses and Dissertations

A primary objective of state wildlife management agencies is to establish sustainable harvest levels for game species. An important component of sustainable management practices is the identification of appropriate management units for monitoring and establishing defensible harvest levels. Across their range, bobcats (Lynx rufus) are an ecologically and economically important species. Despite their importance, little is known about the genetic structure of bobcat populations in South Dakota. We used tissue sampled from n = 1,215 bobcats harvested across the state from 2014–2019 to infer population genetic structure. We used 17 microsatellite loci and a sex identification marker to assign individuals …

Additive And Interface Engineering Of Lead-Tin Mixed Low-Bandgap Perovskite Solar Cells For Higher Efficiency And Improved Stability, Nabin Ghimire

Electronic Theses and Dissertations

Lead (Pb) -Tin (Sn) mixed perovskites suffer from large open-circuit voltage (VOC) loss due to the rapid crystallization of perovskite film, creating Sn and Pb vacancies. Such vacancies act as defect sites expediting charge carrier recombination, thus hampering the charge carrier dynamics and optoelectronic properties of perovskite films. In the first project, we focused on the passivation of perovskite surface defects to increase the opencircuit voltage of the 1.25 eV low-bandgap perovskite solar cells by utilizing a trace amount of Phenethylammonium iodide (PEAI) in the perovskite precursor solution as a doping agent. The incorporation of PEAI in perovskite precursors improved …

Advanced Analytical Techniques For The Analysis Of Therapeutics Of Toxic Inhalation Agents And Pharmacokinetic Investigation, Subrata Bhadra

Electronic Theses and Dissertations

Toxic inhalation agents (TIAs), (i.e., cyanide (CN) and reduced sulfur compounds (RSCs)), including hydrogen sulfide (H2S) and methanethiol (MT)) are extremely poisonous upon exposure. Many TIAs act by inhibiting mitochondrial cytochrome c oxidase, resulting in cellular hypoxia, cytotoxic anoxia, apnea, respiratory failure, cardiovascular collapse, seizure and potentially death. CN is generated in structural fires and cigarette smoke as well as in mining, electroplating and polymer processing, whereas H2S and MT are found in petroleum, oil and natural gas, waste treatment facilities and decaying organic matter. All are common occupational gas exposure hazards in chemical industries and for first responders, including …

Changes In Pregnancy - Associated Glycoproteins Associated With Fetal Age, Postpartum Interval And Evaluation Of A Chute-Side Lateral Flow Assay, Adalaide C. Kline

Electronic Theses and Dissertations

Transrectal ultrasonography is known as the gold standard for pregnancy detection but requires costly equipment and technical skill. Access to a cheaper and more user-friendly method with similar accuracy to transrectal ultrasonography would be beneficial to individual cattle producers and to the cattle industry as a whole. Pregnancy diagnosis by detection of pregnancy-associated glycoproteins (PAGs) has the ability to accurately determine pregnancy in ruminants, however, usually requires specialized equipment for the assay. Pregnancy-associated glycoprotein pregnancy tests are gaining in popularity due to their ease of use and the unique feature of not requiring specialized training. Recently, a new lateral flow …

The Empirical Journey On The Roads Less Traveled To Explore The Concept Of Medication Competence And Address Nursing Students’ Pharmacology Self-Efficacy, Melynda Thelen

Electronic Theses and Dissertations

Medication competence is a priority within the academic setting, as it allows nurses to provide sound knowledge-based care and ensure safe medication delivery. Nevertheless, there is a dearth of theoretical or conceptual basis and definition of medication competence to guide assessment, analysis, and development of informed empirical evidence. Literature has also suggested current curricula do not support the complex and in-depth nature of nursing pharmacology. This dissertation paper presents three seminal manuscripts which provides the researcher’s pathway in discovering and analyzing an innovative nursing pharmacology educational strategy. The first manuscript focused on a concept analysis on medication competence, which provided …

Estimating The Impacts Of Acculturation On The Health Of Immigrants In The United States, Tingting He

Electronic Theses and Dissertations

The growth in the immigration population in the U.S. has transformed American demographic profile and has led to magnification in health disparities in the United States. The main purpose of this dissertation is to examine the relationship between acculturation and health behavior, mental health outcomes, and access to health care service among immigrants in the U.S. Relying on the acculturation framework, the dissertation intends to increase the understanding of health disparities and health patterns among immigrants. The dissertation utilizes the secondary data from National Health Interview Survey (NHIS) data to examine the effects of acculturation on health of immigrants. Measures …

Seismic Performance Of Mechanically Spliced Precast Bridge Columns With New Couplers, Evan Greeneway

Electronic Theses and Dissertations

Lap splicing is not always the most economical or practical approach to achieve reinforcement bar continuity. Mechanical bar splices, or bar couplers, are one alternative that may be far more practical. Currently, the US codes do not allow for the use of bar couplers in the plastic hinge region for RC members in areas of high seismic activity. There has not been enough research into the couplers behavior when subjected to significant inelastic lateral deformations. The Lohr Structures Laboratory was used to conduct an experimental study on campus of South Dakota State University to evaluate the seismic performance of mechanically …

Catholic Elementary School Principals, The Transfer Of Marketing Knowledge, And The Diffusion Of School Marketing, Lisa A. Geosits

Electronic Theses and Dissertations

Despite elementary Catholic schools engaging in school marketing for some years, the level of knowledge of the school leaders and the challenges related to school marketing and the implementation of a marketing framework is not known. The researcher focused this qualitative case study on identifying the key relationship marketing performance indicators and the diffusion of school marketing that contribute to a sustainable organization after the implementation of marketing and culture change. The research questions explored the main knowledge, skills, and abilities related to marketing and leadership that can be used to aid the elementary Catholic school leaders to assist in …

College Recruitment Of Low-Income Underrepresented Minority Students, Cassady M. Ogedegbe

Electronic Theses and Dissertations

The relationship between the use of discriminatory recruitment procedures against low-income unrepresented minority (URM) students at four-year private institutions based on enrollment managers’ and college recruiters’ beliefs, self-efficacy, and behavioral intentions was this study’s focus. Specifically, the following were investigated: (a) how enrollment managers perceive their role in recruiting low-income URM students, (b) how college recruiters understand their role in recruiting low-income URM students, (c) the effective strategies enrollment managers use to prepare recruiters for recruiting low-income URM students, and (d) the differential impact in recruiting low-income URM students versus their counterparts. A supporting factor explored further in this study …

The Effect Of Servant Leadership On Nonprofit Workplace Conflict, Lorena M. Freeborough

Electronic Theses and Dissertations

Workplace conflict depletes nonprofit organizations of valuable time and energy. Organizations spend millions of dollars because of the financial and human cost of unresolved interpersonal conflict in the workplace that stem from ineffective leadership behaviors. A leader’s ineffective behaviors have been linked to the organizational pressures that can cause and spread counterproductive workplace behavior, which results in interpersonal conflict and great financial cost. The purpose of this quantitative correlational study was to determine the relationship between servant leadership behaviors and interpersonal workplace conflict in nonprofit organizational settings in the United States. Specifically, the intended goal of this research was to …

Professional Learning Community: Perspectives Of Rural School Teachers And Leaders, Brenda Olivia Martinez

Electronic Theses and Dissertations

This study addressed rural school administrators’ and teachers’ perceptions about the implementation and participation in professional learning communities (PLC) to impact teacher growth, increase student achievement, and improve instructional practices. The purpose of this study was to evaluate the perceptions of rural administrators and teachers about PLCs within a rural West Texas school district. Research protocols were polished through a pilot study group that provided input to refine the survey and interview questions. The researcher administered a survey for all participants, conducted a one-on-one interview with administrators, and interviewed teachers in focus groups. Findings indicated that collaboration, implementation factors, and …

Noncognitive Attributes As A Measure For College Admission: Exploring The Relationship Between Cognitive And Noncognitive Factors In First-Year College Student Success, Amanda E. Craddock

Electronic Theses and Dissertations

Cognitive factors, such as standardized test scores and high school grade point average, have historically been used to predict college success. Many colleges and universities place great importance on these cognitive factors when making admissions decisions. However, enrollment leaders question the predictive validity of these factors due to recent studies advocating for the use of noncognitive assessments. The purpose of this study was to examine the role that noncognitive attributes have in predicting college student success and whether their predictive power is greater than that of standardized test scores and high school grade point average. This study employed a quantitative …

Development Of Triangular And Tetrahedral Finite Elements For Solutions To Thermoelastic Instabilities Using Hotspotter, Cortney Samuel Leneave

Electronic Theses and Dissertations

The objective of the work presented in this thesis is to develop first-order triangular and tetrahedral elements for solutions to Thermoelastic Instabilities (TEI) regarding sliding friction systems in Hotspotter.

Hotspotter software uses a finite element method and an eigenvalue method and is an important tool because currently no other commercial software exists which solves the TEI problem for critical velocities and wave numbers of a system. Hotspotter currently uses quadrilateral and hexahedral elements for two and three dimensional analysis, respectively. Typically, tri and tet elements are used in industry when doing static and dynamic stress analysis. Therefore, the Hotspotter user …

Accurate Measurement Of Healthy Joint Kinematics To Inform Diagnosis And Treatment, Vasiliki Kefala

Electronic Theses and Dissertations

The description of human motion has a primary importance in different scientific areas such as medicine, sports, physical therapy. Kinematics specifically studies pure motion without reference to the causes of motion such as forces. Understanding the kinematics of human movement is of critical importance in medicine and biology. Motion measure­ment can be used in order to to evaluate functional performance of limbs under normal and abnormal conditions. Kinematic knowledge is also important for diagnosis and surgi­cal treatment of joint disease and the design of implants to rehabilitate function. Accurate joint kinematics is essential to protect articular functionality. An alteration may …

An Lre Placement Loophole: A Critical Policy Analysis Of Lre Placement In Defining Disproportionality Of Culturally And Linguistically Diverse Students In Special Education, Arti Sachdeva

Electronic Theses and Dissertations

The policies adopted by the Exceptional Children’s Education Act (2016) enabled disproportionality within LEAs by overlooking undocumented classroom removal practices, underestimating the monitoring and reporting criteria, and overlooking non-dominant cultural and linguistic groups within the Colorado community. In this critical policy analysis, I used quantitative methods to analyze and explore the difference between the odds ratio calculation of culturally and linguistically diverse students (CLDS) in special education with a least restrictive environment (LRE) of 40% and greater compared to Colorado’s acceptance of the federal mandate of the minimum requirement of the student LRE of less than 40% and alternate school …

Instructional Coaching For Culturally Responsive Pedagogy, Kelly Shorb

Electronic Theses and Dissertations

Growing up with a global perspective and teaching in highly diverse schools has fueled my desire to understand how instructional coaching and Culturally Responsive Pedagogy work together in education. This case study examined the current practices of instructional coaches to understand how they incorporate components of Culturally Responsive Pedagogy. Through observations and interviews of three coaches and a director this study explored the interactions, behaviors and language of coaches as they engaged with teachers to explore and understand prior knowledge, beliefs and current incorporation of CRP with teachers. The literature review provides an in-depth description of each of the components …

Policies Affecting Post-Traditional Students And Students Facing Economic Instability At The Community College, Joshua Patrick Bowens

Electronic Theses and Dissertations

The following dissertation in practice researches policies from the Colorado Community College System (CCCS) that relate to Post-Traditional students and students experiencing economic instability. Using a conceptual framework of Motivational Theory (Maslow, 1943; Harrigan & Lamport-Commons, 2015; Herzberg, 1959) and the Principal-Agent theory (Jensen, & Meckling, 1976), this dissertation focuses on how one community college (CC) within the CCCS system interprets and implements those policies both college and campus wide, as well as departmentally. Although many studies exist pertaining to community college students, literature pertaining to Post-Traditional students in a community college setting has not been fully explored. This will …

Exponential Random Graphs And A Generalization Of Parking Functions, Ryan Demuse

Electronic Theses and Dissertations

Random graphs are a powerful tool in the analysis of modern networks. Exponential random graph models provide a framework that allows one to encode desirable subgraph features directly into the probability measure. Using the theory of graph limits pioneered by Borgs et. al. as a foundation, we build upon the work of Chatterjee & Diaconis and Radin & Yin. We add complexity to the previously studied models by considering exponential random graph models with edge-weights coming from a generic distribution satisfying mild assumptions. In particular, we show that a large family of two-parameter, edge-weighted exponential random graphs display a phase …

Broadening The Capability Of Kinetics Analysis In Biomechanics, Nicholas Nelson

Electronic Theses and Dissertations

Two studies are discussed in this manuscript each preceded by a literature review of the topic. The first review and study explore agility movements and the effect that alternative upper designs in shoes might have on ground reaction force measures of performance. The second review and study evaluate methods of predicting ground reaction forces without the use of a force platform. A method of using effective forces and ways of improving its accuracy are evaluated in depth.

Dislocation Mechanics Of Total Hip Arthroplasty: A Combined Experimental And Computational Analysis, Michael Scinto

Electronic Theses and Dissertations

While total hip arthroplasty is considered a successful procedure, dislocation remains a serious complication as recurrent dislocations may require additional surgeries. Knowledge on dislocation events as they occur in vivo are limited, therefore researchers rely on experimental and computational methods. A custom MATLAB script and an experimental procedure utilizing a six-degree of freedom actuator were developed to further understand how various surgical considerations affect dislocation mechanics in total hip arthroplasty. Computationally, it was determined that impingement free range of motion is limited during internal rotation in flexion and during external rotation in extension. Experimentally, our results suggest that the posterior …

Tibial Strains And Tray-Bone Micromotions After Total Knee Arthroplasty: Computational Studies Evaluating The Tibial Fixation, Huizhou Yang

Electronic Theses and Dissertations

Cemented and cementless fixation in total knee arthroplasty (TKA) have been successfully used for decades. As the number of younger and more active patients treated with TKA continues to increase, long-term implant survivorship is of increasing importance. One of the most common complications and hence the reason for revision is mechanical loosening (23.1% of all revised TKA). The loosening mechanisms have been proposed for different fixation types. For cemented fixation, bone remodeling after surgery is regulated by the changes in strain energy density (SED). The recruitment of osteoclasts and osteoblasts is controlled by SED-related signals. Insufficient stimuli can promote bone …

An Accuracy And Precision Analysis Of The Velys™ Robotic Assisted Solution For Total Knee Arthroplasty, Gary Doan

Electronic Theses and Dissertations

Total knee arthroplasty (TKA) is a procedure where the arthritic surfaces of the knee is removed and replaced with a combination of metal and polymer implants that recreates the joint line to restore function and quality of life. Implant alignment is important in the success of a TKA. Modern day conventional instrumentation can be cumbersome in the operating room and can be inaccurate when resecting bone and aligning implants. Patients with large errors in resections and implant orientation are more prone to experience mechanical failures with their TKA. Mechanical failures in primary TKA require revision surgeries which can lead to …

“It Sucks, But I’M Grateful”: Understanding The Experience Of Autistic Students Living In The Residence Halls, Mary F. Elliott

Electronic Theses and Dissertations

As populations of Autistic students at institutions of higher education increases, it is becoming more important for institutions to evaluate their programs with these students in mind. While the Autistic population has grown, policies and services on campuses have not become more inclusive or supportive of this population as a response. This evaluation examines the Residential Learning Model, the guide through which the residential life program at one institution of higher education is delivered to the students living in the residence halls. Through the lens of the Autistic students and the student staff who live and work in the residence …

Exploring The Impact Of Leadership Values And Practices To Support Equity And Social Justice In An Urban School, Susan-Marie Farmen

Electronic Theses and Dissertations

This qualitative case study explores the leadership values and practices of a principal in a sixth through twelfth-grade school in the Rocky Mountain West to determine how leadership values and practices support the implementation of equitable and socially just practices in the school. Five key themes emerged: (a) equity as a Black/non-Black construct; (b) a lack of knowledge and awareness of the historical contexts of marginalized populations; (c) moral courage for all members of the school; (d) equity as an initiative or program; (e) resistance to deep equity work. From these themes, I devise three recommendations to support substantial and …

Culturally Responsive School Leadership Agility: A Journey Through Critical Self-Reflection, Deborah Mckelvey Brown

Electronic Theses and Dissertations

This study examined how school leaders can differentiate their approach using a self-reporting psychometric instrument called the Emergenetics® Profile when engaged in critical self-reflection. Using a multiple case study approach, three urban school leaders engaged in the deconstructing and reconstructing of knowledge frameworks specific to deficit thinking. The Emergenetics Profile served as a lens to critically self-reflect in order to differentiate their approach to the disrupt deficit thinking practices in their schools (Browning 2007; Khalifa, 2018; Shields, 2018). This study integrated these insights from critical self-reflection and the awareness gained by school leaders through their Emergenetics preferences to change their …

Evaluating Foundational Components Of Research Consultations In An Academic Library Research Center, Ryan F. Buller

Electronic Theses and Dissertations

As our society continues to evolve at an ever-increasing rate, our higher education institutions, and the services they provide, must keep pace with societal changes in order to ensure that those services stay current and relevant. This program evaluation examines one such service, the research consultation model in University Libraries at the University of Denver. This evaluation was situated within the Human Ecological Theory Framework, to help understand how different environments can impact the recognition and value placed upon the foundational components of the service. An exploratory sequential mixed methods approach was used to determine what the foundational components of …

Mechanical Strength Assessment Of Pharmaceutical Compacts With Refractive Index Measurements From Terahertz Time Of Flight Spectroscopy, Shikhar Mohan

Electronic Theses and Dissertations

The mechanical strength of pharmaceutical compacts is often considered as a critical quality attribute for roller and tablet compaction processes. Most traditional mechanical strength tests are destructive, thus, preventing further material testing. This thesis expands on the application of terahertz time of flight spectroscopy (THz-TOF) as a nondestructive technique for assessing mechanical strength. This technique is able to extract the refractive index; which is a function of porosity and crystallinity of the solid. Thus, it was hypothesized that refractive index measurements from terahertz time of flight spectroscopy are directly related to porosity; therefore, these nondestructive measurements are able to correlate …

The Rhetoric Of Jimmy Carter: Renewing America’S Confidence In Civic Leadership Through Speech And Political Education, Christopher Bondi

Electronic Theses and Dissertations

July 15, 2019 marked the fortieth anniversary of President Jimmy Carter’s “Crisis of Confidence” speech, a catalyst for what became an often overlooked yet significant turning point in the nation’s history. Carter’s words were both poignant and pointed as he calmly, yet directly, addressed the nation’s dependence on fossil fuels and engagement in narcissistic practices that led to a coveting of material goods. In an examination of the events that shaped this historical moment, this dissertation contends that, despite President Carter’s attempt to steer America in a more environmentally and socially conscious direction, the nation instead acquiesced to Ronald Reagan’s …

Functionalized Materials From Atom Transfer Radical Processes, Sean Fischer

Electronic Theses and Dissertations

This work is focused on the synthesis, characterization, and application of functionalized materials prepared from atom transfer radical processes. Atom transfer radical processes encompass both atom transfer radical addition (ATRA) and polymerization (ATRP) reactions, both of which are catalyzed by ppm amounts of copper complexes. The synthetic efforts of ATRA include increasing adduct selectivity through optimization of reaction conditions to generate small molecules in high to moderate yields. ATRA provides retention of the halogen moiety, which is an attractive functional group that can be further modified with other transformations. Specifically, the copper-catalyzed azide-alkyne [3+2] cycloaddition (CuAAC) allows for the realization …

Design And Synthesis Of Pyrimidine Based Fused Heterocyclics In The Potential Treatment Of Cancer And Opportunistic Infection, Farhana Islam

Electronic Theses and Dissertations

Dose-limiting toxicities of clinically used agents and development of resistance are two significant limitations in cancer chemotherapy. Microtubule targeting agents (MTAs) are a structurally diverse set of compounds that disrupt microtubule dynamics and exert their anticancer effect. Combination chemotherapy with antiangiogenic agents and microtubule targeting agents has shown an advantage against both these drawbacks. Single agents with dual antiangiogenic activity and cytotoxicity would afford a therapy that circumvents pharmacokinetic problems of multiple agents, avoid drug-drug interactions, lower the drug dose, decrease overlapping toxicities, and delay or prevent tumor cell resistance. The work in this dissertation reflects the progress of fused …