Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 30 of 116

Full-Text Articles in Entire DC Network

The Effects Of A Reduced Force Aerial Bucket Control On Upper Extremity Muscular Demands As Assessed With Surface Electromyography, Casey D. Garces Oct 2017

The Effects Of A Reduced Force Aerial Bucket Control On Upper Extremity Muscular Demands As Assessed With Surface Electromyography, Casey D. Garces

Master's Theses (2009 -)

A common control for operating aerial bucket trucks for utility companies in North America is called a pistol grip control. Based upon many anecdotal reports of forearm muscle fatigue from workers using this control, Prof. Richard Marklin began an EPRI-sponsored study in 2016 using EMG to determine muscle fatigue of workers while they used the pistol grip. Muscle activity recorded by EMG is a measure of the magnitude of muscle force under controlled conditions. This study confirmed the reports of muscle fatigue in extensor digitorum communis (EDC) muscle in the right forearm. The next phase of the study was to …


Ruthenium Catalyzed Deaminative Coupling Reaction Of Amines Via C-N Bond Activation, Pandula T. Kirinde Arachchige Oct 2017

Ruthenium Catalyzed Deaminative Coupling Reaction Of Amines Via C-N Bond Activation, Pandula T. Kirinde Arachchige

Master's Theses (2009 -)

C–N bond activation via transition-metal catalyst has attracted much attention during the past two decades. This strategy has become one of the most promising way to generate secondary amines, which are very important in a broad spectrum of applications in pharmaceutical industry, synthetic organic chemistry and material science. The secondary amines can be utilized as an important synthetic intermediate for further manipulations. The in-situ formed catalytic system generated from the tetranuclear Ru–H complex with 4-(1,1-dimethylethyl)-1,2-benzenediol ligand was found to be effective for the synthesis of secondary amines from the direct deaminative coupling of amines. The ruthenium catalyst was highly effective …


Elucidating The Mechanical, Structural, Functional, And Molecular Mechanisms Involved In Irreversible Vascular Changes In Aortic Coarctation, Brandon Wegter Oct 2017

Elucidating The Mechanical, Structural, Functional, And Molecular Mechanisms Involved In Irreversible Vascular Changes In Aortic Coarctation, Brandon Wegter

Master's Theses (2009 -)

Coarctation of the aorta (CoA) is a constriction of the thoracic aorta and is one of the most common congenital cardiovascular defects. Treatment by surgical correction has saved the lives of thousands of children, but many still have a reduced lifespan due to hypertension. Previous results using our novel rabbit model showed that the current treatment guideline of a 20 mmHg blood pressure gradient (BPG) induces irreversible vascular changes, which persisted despite correction. Preliminary data of the downregulation of natriuretic peptide receptor C (NPR-C) in proximal aortic tissue of human patients with CoA serves as the possible underlying mechanism for …


Let My People In: A Comparative Study Of Diversity Rhetoric To Reality In Institutions Of Higher Education, Darvelle Hutchins Oct 2017

Let My People In: A Comparative Study Of Diversity Rhetoric To Reality In Institutions Of Higher Education, Darvelle Hutchins

Master's Theses (2009 -)

Due to longstanding structures that have failed to provide an academic climate that is inclusive of the many dimensions of difference that exist among all people, institutions of higher education are under increased pressure to not only communicate but to live out a commitment to diversity as a means for business survival. By conducting this two-step research study at one private, Midwestern university, I examined the extent to which Black faculty members identified with their institutional rhetoric on diversity. In the first step, I completed a rhetorical analysis on four official texts to fully understand the extent to which Saint …


Collapsible Silicone Tubes: An In Vitro Model For Tracheal Traction, Kevin D. Garman Oct 2017

Collapsible Silicone Tubes: An In Vitro Model For Tracheal Traction, Kevin D. Garman

Master's Theses (2009 -)

Obstructive sleep apnea (OSA) is characterized by recurrent episodes of airway collapse and airflow limitation during sleep. Fragmented sleep and reductions in blood oxygen saturation lead to several comorbidities, including hypertension, cardiovascular disease, and cerebrovascular disease. Longitudinal forces (tracheal traction) acting on the soft tissues surrounding the upper airway have been proposed to play a significant role in stabilizing the airway and preventing collapse. However, the relative contribution of longitudinal forces as compared to other factors that affect airway stability (airway geometry, tissue properties, muscle activity) remains unclear. This in-vitro study aimed to investigate to what extent longitudinal forces can …


Performance Analysis Of Constant Speed Local Abstacle Avoidance Controller Using A Mpc Algorithym On Granular Terrain, Nicholas Haraus Oct 2017

Performance Analysis Of Constant Speed Local Abstacle Avoidance Controller Using A Mpc Algorithym On Granular Terrain, Nicholas Haraus

Master's Theses (2009 -)

A Model Predictive Control (MPC) LIDAR-based constant speed local obstacle avoidance algorithm has been implemented on rigid terrain and granular terrain in Chrono to examine the robustness of this control method. Provided LIDAR data as well as a target location, a vehicle can route itself around obstacles as it encounters them and arrive at an end goal via an optimal route. This research is one important step towards eventual implementation of autonomous vehicles capable of navigating on all terrains. Using Chrono, a multibody physics API, this controller has been tested on a complex multibody physics HMMWV model representing the plant …


Spin Crossover Behavior Of N-Confused C-Scorpionate Complexes Of Iron(Ii) Trifluoromethanesulfonate, Kristin Joy Meise Oct 2017

Spin Crossover Behavior Of N-Confused C-Scorpionate Complexes Of Iron(Ii) Trifluoromethanesulfonate, Kristin Joy Meise

Master's Theses (2009 -)

An understanding of the molecular properties that influence highly-cooperative SCO behavior is critical in the development of new electronic materials. The purpose of this thesis work is to more fully examine whether hydrogen bonding interactions can be used to assemble iron(II) scorpionate complexes and whether this leads to abruptness in the SCO behavior. In this contribution, new N-confused C-scorpionate ligands are prepared with two ‘normal’ pz* groups ( = 3,5-dimethylpyrazol-1yl) and a ‘confused’ pyrazolyl with either an N-H, HL*, or an N-Tosyl (Tosyl = p-toluenesulfonyl), TsL*, bound to a central methine. These bulky ligands complement those previously described, HL and …


Construction And Characterization Of A Single Stage Dual Diaphragm Gas Gun, Nathaniel Steven Helminiak Oct 2017

Construction And Characterization Of A Single Stage Dual Diaphragm Gas Gun, Nathaniel Steven Helminiak

Master's Theses (2009 -)

In the interest of studying the propagation of shock waves, this work sets out to design, construct, and characterize a pneumatic accelerator that performs high-velocity flyer plate impact tests. A single stage gas gun with a dual diaphragm breach allows for a non-volatile, reliable experimental testing platform for shock phenomena. This remotely operated gas gun utilizes compressed nitrogen to launch projectiles down a 14 foot long, 2 inch diameter bore barrel, which subsequently impacts a target material of interest. A dual diaphragm firing mechanism allows the 4.5 liter breech to reach a total pressure differential of 10ksi before accelerating projectiles …


Effects Of Random Oscillations On Balance Control In Healthy Young Adults, Jacob Van Dehy Oct 2017

Effects Of Random Oscillations On Balance Control In Healthy Young Adults, Jacob Van Dehy

Master's Theses (2009 -)

In human walking, balance control is managed through proactive changes in spatio-temporal parameters of stepping [1]. It has been suggested that continuous disruptions to healthy young adult balance cause greater changes to overall variability of these parameters than a shift in the mean stepping parameters [2]. This suggests that walking may be occurring in a more reactive manner, modulating to maintain balance without increasing the mean significantly. Work using continuous oscillations to treadmill walking suggest there is an interplay between the predictability of a signal used to disrupt subject balance and the degree to which compensation occurs [3]. To determine …


Design Of A Passive Ankle Prosthesis With Energy Return That Increases With Increasing Walking Velocity, Alexander J. Folz Oct 2017

Design Of A Passive Ankle Prosthesis With Energy Return That Increases With Increasing Walking Velocity, Alexander J. Folz

Master's Theses (2009 -)

Patients who undergo a transtibial (below the knee) amputation are often met with a difficult decision: selection of a prosthesis. Limitations of currently available prostheses motivate work on a new solution, the EaSY Walk, a passive device that mimics two key aspects of the natural ankle: non-linear rotational stiffness through implementation of a stiffening flexure mechanism and rotational work output that varies as a function of walking velocity to propel the user forward. To achieve the latter, a strategy to convert the maximum available translational energy acquired from deflection along the leg into rotational energy about the ankle joint through …


Is It Just Me Or Was That Sexist? Perception Of Hostile And Benevolent Sexism In The Context Of Race, Mackenzie S. Kirkman Oct 2017

Is It Just Me Or Was That Sexist? Perception Of Hostile And Benevolent Sexism In The Context Of Race, Mackenzie S. Kirkman

Master's Theses (2009 -)

Sexism is a common problem in the U.S. A major component of addressing this problem is determining the circumstances in which sexism is identified. One particular characteristic relevant to the perception of sexism is the race of the perpetrator of sexist behaviors. Using a vignette design, the current project explored whether sexism was identified at different rates or perceived as more or less sexist depending on the race of the man perpetrating sexist behaviors and whether it was hostile or benevolent sexism (Glick & Fiske, 1996). When a Black man engaged in sexist behavior, he was perceived as more sexist …


Sleep, Internalizing Symptoms, Executive Functioning, And Diabetes Outcomes In Adolescents With Type 1 Diabetes Mellitus, Ashley Charlene Moss Oct 2017

Sleep, Internalizing Symptoms, Executive Functioning, And Diabetes Outcomes In Adolescents With Type 1 Diabetes Mellitus, Ashley Charlene Moss

Dissertations (1934 -)

Insufficient sleep is a nearly universal problem during adolescence and is likely associated with various biopsychosocial and contextual factors present with this developmental period. Youth with type 1 diabetes mellitus (T1DM) may experience greater sleep difficulties, poorer sleep quality, and greater daytime sleepiness/fatigue compared to healthy youth. Also, sleep difficulties are associated with poorer diabetes outcomes (e.g., treatment adherence). Understanding how sleep may impact illness management during adolescence is critical given increasing rates of non-adherence during this developmental period. Although research suggests poor sleep is associated with decreased neurocognitive functioning and increased internalizing behavior among healthy youth, limited research has …


Cognitive Impairment, Depression, Anxiety, And Personality And Ms Patient Estimations Of Memory Function, Jordan Charboneau Oct 2017

Cognitive Impairment, Depression, Anxiety, And Personality And Ms Patient Estimations Of Memory Function, Jordan Charboneau

Dissertations (1934 -)

Multiple Sclerosis (MS) is an autoimmune disease of unknown etiology, characterized by a wide range of physical, cognitive, psychological, and behavioral symptoms. To effectively diagnose and treat MS, clinicians rely on patient reports of function to help identify and treat their problems (Kinsinger, Lattie, & Mohr, 2010). Specifically, self-reports of cognitive symptoms are a valuable source of information upon which clinicians depend (Van der Hiele, Spliethoff-Kamminga, Ruimschotel, Middelkoop, & Visser, 2012). While patient reports of cognitive functioning, including memory, are important, there has been substantial debate about the accuracy of such information. The present study investigated the association between general …


An Empirical Examination Of A Well-Being Engine Model, Korey Jacob Connor Oct 2017

An Empirical Examination Of A Well-Being Engine Model, Korey Jacob Connor

Dissertations (1934 -)

Humanity has struggled to define the good life from, at very least, the beginning of recorded history. The last three decades have seen a major uptick in the amount of scholarly activities in this vein, with contemporary iterations falling under the auspices of well-being studies. These studies in the field of psychology, while abundant, have tended to align closely with one of a select few schools of thought while eschewing alternative approaches. Studies are produced at a dizzying rate, but are often limited in scope and in need of greater conceptual clarification. A promising integrative theoretical model, called the engine …


Developing Capabilities: A Feminist Discourse Ethics Approach, Chad Kleist Oct 2017

Developing Capabilities: A Feminist Discourse Ethics Approach, Chad Kleist

Dissertations (1934 -)

This dissertation attempts to preserve the central tenets of a global moral theory called “the capabilities approach” as defended by Martha Nussbaum, but to do so in a way that better realizes its own goals of identifying gender injustices and gaining crosscultural support by providing an alternative defense of it. Capabilities assess an individual’s well-being based on what she is able to do (actions) and who she is able to be (states of existence). Nussbaum grounds her theory in the intuitive idea that each and every person is worthy of equal respect and dignity. The problem with grounding a theory …


Feature Space Augmentation: Improving Prediction Accuracy Of Classical Problems In Cognitive Science And Computer Vison, Piyush Saxena Oct 2017

Feature Space Augmentation: Improving Prediction Accuracy Of Classical Problems In Cognitive Science And Computer Vison, Piyush Saxena

Dissertations (1934 -)

The prediction accuracy in many classical problems across multiple domains has seen a rise since computational tools such as multi-layer neural nets and complex machine learning algorithms have become widely accessible to the research community. In this research, we take a step back and examine the feature space in two problems from very different domains. We show that novel augmentation to the feature space yields higher performance. Emotion Recognition in Adults from a Control Group: The objective is to quantify the emotional state of an individual at any time using data collected by wearable sensors. We define emotional state as …


The Mediating Effects Of Positive Thinking And Social Support On Suicide Resilience Among Undergraduate Students, Denise Marie Matel-Anderson Oct 2017

The Mediating Effects Of Positive Thinking And Social Support On Suicide Resilience Among Undergraduate Students, Denise Marie Matel-Anderson

Dissertations (1934 -)

Suicide has been the 2nd leading cause of death for 18-24-year-olds in the US since 2011. The stress experienced by undergraduate college students has the potential to increase ones’ risk for suicide. Resilience theory was used as a theoretical framework to examine the interplay between risk and protective factors. A cross-sectional and correlational design was used to assess the mediating effects of positive thinking and/or social support on suicide resilience in 131 college students 18-24 years old who completed an online survey. An indirect effect of self-esteem on suicide resilience was found through positive thinking and social support indicating that …


Biculturalism, Bilingualism, & Executive Function Among U.S. Latinos: Implications For Cognitive Reserve, Leticia G. Vallejo Oct 2017

Biculturalism, Bilingualism, & Executive Function Among U.S. Latinos: Implications For Cognitive Reserve, Leticia G. Vallejo

Dissertations (1934 -)

The current study was an exploratory investigation of the cultural constructs of biculturalism and bilingualism as predictors of executive function among a community-based sample of 25 older adult Latinos living in the U.S. The potential moderating effects of education and bicultural identity integration were also examined. Using regression analyses, biculturalism and bilingualism were examined independently as predictors of performance on three separate tasks of executive function: trail making tests, a phonemic fluency task, and a clock drawing task. Bilingualism was not found to predict performance on any of the executive functioning tasks. In the overall sample, biculturalism also was not …


Quantifying Forecast Uncertainty In The Energy Domain, Mohammad Saber Oct 2017

Quantifying Forecast Uncertainty In The Energy Domain, Mohammad Saber

Dissertations (1934 -)

This dissertation focuses on quantifying forecast uncertainties in the energy domain, especially for the electricity and natural gas industry. Accurate forecasts help the energy industry minimize their production costs. However, inaccurate weather forecasts, unusual human behavior, sudden changes in economic conditions, unpredictable availability of renewable sources (wind and solar), etc., represent uncertainties in the energy demand-supply chain. In the current smart grid era, total electricity demand from non-renewable sources influences by the uncertainty of the renewable sources. Thus, quantifying forecast uncertainty has become important to improve the quality of forecasts and decision making. In the natural gas industry, the task …


Exodus As New Creation, Israel As Foundling: Stories In The History Of An Idea, Christopher Evangelos John Brenna Oct 2017

Exodus As New Creation, Israel As Foundling: Stories In The History Of An Idea, Christopher Evangelos John Brenna

Dissertations (1934 -)

This study surveys the development of two literary phenomena in early Jewish and Christian tradition. The first is the birth story of a portentous child, exemplified by the birth stories of Moses, Noah, Melchizedek, and Jesus in biblical and Second Temple period literature. The second is the mythical expansion of the exodus tradition, which interprets the crossing of the Red Sea as a recreation of the people of Israel. I examine the appropriation of these two phenomena in the late antique Hellenistic story, Joseph and Aseneth. I contend that (1) the early Jewish birth story paradigm is influenced by the …


Spectral Characterization Of Cytochromes P450 Active Sites Using Nmr And Resonance Raman Spectroscopy, Remigio Usai Oct 2017

Spectral Characterization Of Cytochromes P450 Active Sites Using Nmr And Resonance Raman Spectroscopy, Remigio Usai

Dissertations (1934 -)

The Cytochrome P450 (P450s) has been the subject of intense research for over six decades. An efficient approach for isotopic labeling of the prosthetic group in heme proteins was exploited to produce an analogue of the soluble bacterial cytochrome P450cam (P450cam) that contains a 13C labeled-protoheme prosthetic group. HU227 strain of E. coli, which lacks the δ-aminolevulinic acid (δ-ALA) synthase gene, was employed in the heterologous expression of P450cam harboring a prosthetic group labeled with 13C at the Cm and Cα positions by growing cells in the presence of [5-13C] δ-ALA, which was synthesized in four steps from [2-13C] glycine. …


Hip Joint Function In People With Femoroacetabular Impingement Syndrome, Philip Malloy Oct 2017

Hip Joint Function In People With Femoroacetabular Impingement Syndrome, Philip Malloy

Dissertations (1934 -)

Femoroacetabular impingement syndrome (FAIS) is a clinical hip disorder that represents symptomatic contact between the proximal femur and rim of the acetabulum during normal hip range of motion. FAIS has been described as a precursor to hip joint osteoarthritis (OA), and results in physical impairments and functional limitations in young individuals and active adults. Despite tremendous growth in arthroscopic hip surgery for FAIS, little is known about how this disorder affects dynamic hip joint function. The purpose of this dissertation was to investigate hip joint function, during clinical and functional activities, both before and after arthroscopic hip surgery for FAIS. …


Muscle Coordination Contributes To Function After Stroke; Proprioception Contributes To Control Of Posture, Movement, Maria Bengtson Oct 2017

Muscle Coordination Contributes To Function After Stroke; Proprioception Contributes To Control Of Posture, Movement, Maria Bengtson

Dissertations (1934 -)

More than half of stroke survivors experience persistent upper extremity motor impairments that can negatively impact quality of life and independence. Effective use of the upper extremity requires coordination of agonist/antagonist muscle pairs, as well as coordination of multiple control actions for stabilizing and moving the arm. In this dissertation, I present three studies in which I recorded isometric torque production, single joint movement and stabilization, and clinical measures of function and impairments after stroke to evaluate the extent to which changes in coordination of agonist/antagonist muscles and of sequential control actions contribute to deficits after stroke. In Aim 1, …


Motion Artifact Evaluation Of Coronary Ct Angiography Images, Hongfeng Ma Oct 2017

Motion Artifact Evaluation Of Coronary Ct Angiography Images, Hongfeng Ma

Dissertations (1934 -)

The objective of this dissertation was to develop and validate an automated algorithm to quantify motion artifact level on coronary CT angiography (CCTA) images. Unlike existing motion artifact reduction techniques that evaluate the relative level of motion artifacts within one exam, this dissertation aims to quantify the absolute level of motion artifacts across exams from varying patients. The ability to quantify absolute motion artifact level enables several potential applications, for example, assessing and comparing two motion artifact reduction techniques. This dissertation includes three specific aims. Aim 1 investigated the absolute motion artifact quantification effectiveness of six motion artifact metrics using …


Computational Strategies In Uncertainty Quantification For Hazard Mapping, Regis Rutarindwa Oct 2017

Computational Strategies In Uncertainty Quantification For Hazard Mapping, Regis Rutarindwa

Dissertations (1934 -)

There are many hazards associated with volcanic activities. Amongst them are Pyroclastic flows; a mixture of rock fragments, debris and hot gases that flow down the slope of actives volcanoes at high velocities. These flows have proven to be devastating, and at the same time more than 500 millions people in the world live within potential exposure to such a hazard. A few approaches have been used to try to mitigate the impact of volcanic hazard in general. These include remote sensing technology and developing hazard maps – a graphic representation of safe and risky zones for a given volcanic …


Nucleotide-Dependent Preferential Localization Of Ras In Model Membranes With Lipid Raft Nanodomains, Anna Shishina Oct 2017

Nucleotide-Dependent Preferential Localization Of Ras In Model Membranes With Lipid Raft Nanodomains, Anna Shishina

Dissertations (1934 -)

Membrane proteins constitute a third of all proteins in the cell and more than 50% of drug targets. However, the analysis of membrane proteins has many challenges owing to their partially hydrophobic surfaces, flexibility and lack of stability. One example of an essential membrane protein is Ras superfamily. Ras is a small monomeric GTPase involved in regulation of cell growth, proliferation and differentiation. Therefore, Ras and its effectors are among the most important targets for cancer therapy. A detailed knowledge of the processes occurring during signal propagation via Ras might help to elucidate the mechanisms of the involved signal cascades. …


Motivational And Intervention Systems And Monitoring With Mhealth Tools, Golam Mushih Tanimul Ahsan Oct 2017

Motivational And Intervention Systems And Monitoring With Mhealth Tools, Golam Mushih Tanimul Ahsan

Dissertations (1934 -)

Use of mobile and telecommunication technologies has become widespread in the last decade. With this development, use of mobile devices in healthcare (mHealth) is also increasing. Mobile phones, smartphones, and other mobile devices are affordable tools for different health-related services. In my research, with my research team, I have helped to develop several mHealth tools to address the quality of life of cancer survivors, cancer patients, and individuals at increased risk for cancer. Tobacco smoking is the major cause of several types of often-fatal cancers and cardio-respiratory diseases. Optimally, we hypothesize that the most effective mHealth tools should be customized …


Buying For A Cause: Consumer Attitudes Towards Cause Marketing, Using Theory Of Planned Behavior, Katie Lynn Sloan Jul 2017

Buying For A Cause: Consumer Attitudes Towards Cause Marketing, Using Theory Of Planned Behavior, Katie Lynn Sloan

Master's Theses (2009 -)

This research was conducted to learn if consumer attitudes and purchase intentions of cause marketing products could be recognized and better understood by applying Icek Ajzen’s Theory of Planned Behavior (TPB). Specifically, the researcher intended to learn more about consumer participation in cause marketing programs and to start a discussion about what consumers expect or hope to gain from their participation. This study applied purchase-triggered donation cause marketing to a post-test experimental design to investigate if purchase intentions are higher when a cause marketing appeal was present and to learn more about the application of TPB in cause marketing consumer …


Caregivers' Role In Fostering Resilience In Preschoolers, Kristen Yule Jul 2017

Caregivers' Role In Fostering Resilience In Preschoolers, Kristen Yule

Master's Theses (2009 -)

The present study examined the association between specific parenting practices and the development of resilience in preschoolers from high-risk families. The current study used a multi-method, multi-informant design to identify parenting behaviors associated with positive adjustment and well-being in preschoolers exposed to adversity. Families were recruited from Head Start programs and 124 childcaregiver dyads agreed to participate. Child participants (51% male) from grades K3 through K5 ranged from 3-6 years of age (M = 4), while caregivers (85.5% female) were between the ages of 19 and 69 years (M = 32). Participants were predominately Black or African American. Resilience was …


Corporate Social Responsibility In Sports: Efforts And Communication, Daniel Erickson Jul 2017

Corporate Social Responsibility In Sports: Efforts And Communication, Daniel Erickson

Master's Theses (2009 -)

The practice of corporate social responsibility (CSR) has always been integral to sports organizations and is increasing rapidly in popularity. However, scholars have found that there is no true definition of CSR that describes what it is, whom it should help, and how it should be communicated to stakeholders. This thesis examines the CSR initiatives of four major U.S. sports leagues and their teams, as well as how these initiatives are communicated to fans and other stakeholders through the websites associated with these organizations. This study found these organizations make CSR information readily accessible to their stakeholders and participate in …