Digital Commons Network^™

Online Organizational Citizenship Behavior: An Exploration Of New Avenues For Prosocial Behavior In The Digital Age, Sarah Rabon

Electronic Theses and Dissertations, 2020-2023

Internet use has changed modern workplaces and introduced new options for employee behavior, including organizational citizenship behavior (OCB). While prior research suggests the internet is a unique social environment, and not a simple extension of a traditional in-person workplace, OCB has not been studied in this context. This thesis aimed to identify and document the nature of online OCB and identify how it differs in form and function from traditional in-person OCB. This thesis used a mixed methods approach, with self-report data from 201 participants. Results indicate workers engage in OCB online at a lower rate than in person. Some …

The Motuporamines Act Through Rho1 And Rac To Control Actin Dynamics In Drosophila, Corey Seavey

Electronic Theses and Dissertations, 2020-2023

Given that most cancer patients die from metastatic disease, there is an urgent need to develop drugs that inhibit the spread of tumors. Studies show that the motuporamines activate the small GTPase RhoA to prevent cancer cell migration, but little is known about the mechanism of action of dihydromotuporamine C (Motu33) and its synthetic derivative Motu-(CH2)-33. In the present study, I investigated the biomolecular processes of these compounds in Drosophila by reducing the gene dose of positive and negative regulators of actin dynamics. Consistent with previous findings, reduced gene dose of Rho1 (the Drosophila RhoA ortholog) attenuates motuporamine activity confirming …

"Do You Hear What I Say?" A Phenomenological Exploration Of International Students' Oral Communication Experiences With Pechakucha Oral Presentations In A Us English For Academic Purposes Program., Van Thi Hong Le

Electronic Theses and Dissertations, 2020-2023

With the importance of oral communication skills and digital literacy skills for 21st-century learners (Partnership for 21st Century Skills, 2006), there is an increasing tendency to incorporate technology in language learning and teaching. In this trend, PechaKucha Presentation (PKP), a unique, fast-paced format of giving presentations, has recently been advocated for its benefits in developing learners' oral communication skill in various contexts (Angelina, 2019; Coskun, 2017; Mabuan, 2017). This paper presented a study that explored seven international students' speaking and listening experiences with PKP activities while completing the English for Academic Purposes (EAP) program prior to their undergraduate programs in …

Parameter Calibration And Optimization In Smart Grid For Synchronous Generators And Converters, Seyyed Rashid Khazeiynasab

Electronic Theses and Dissertations, 2020-2023

In power systems, monitoring, protection, and control are usually model based; an accurate dynamic model for either synchronous generators or power electronic converters is essential. Besides, renewable energies, smart loads, energy storage, and new market behavior add new sources of uncertainty to power systems. Therefore, planning in real-time and developing high-quality models is crucial to adapt to uncertainties. In this thesis, we propose a framework for validating and calibrating power system models using novel methods. At the first step, we developed the nonlinear sensitivity-based method to find the critical parameters. Then, we propose an Approximate Bayesian Computation (ABC) based method …

Design-Based Research Toward A Professional Development Program, Karl Miehl

Electronic Theses and Dissertations, 2020-2023

The purpose of this dissertation in practice was twofold; The first purpose was to design a Professional Development (PD) program for a specialized group of civilian employees working in a large military organization, and the second purpose was to evaluate and refine that PD program using mixed-methods empirical research. The study focused on a group of approximately 100 Instructional System Specialists and Research Psychologists. These employees are highly educated, with the majority holding advanced degrees in their respective fields, yet they lacked a clear path to career development within their organization. Following the tenets of design-based research, a PD program …

Dynamic Analysis Of The Implementation Of The Blockchain Technology In The Supply Chain, Rehab Ali

Electronic Theses and Dissertations, 2020-2023

Blockchain technology is a new digital technology that has been disrupting the way businesses are performing. It is a decentralized and distributed ledger that enables transactions of any form of value. As blockchain technology provides visibility, transparency, and security through the multi-agent system, the supply chain sector is one of its critical and promising applications. In a highly dynamic environment, the supply chain's efficiency needs to be measured from a blockchain perspective. As the main benefit of blockchain technology is the visibility and real-time access to data, blockchain technology's preeminent affected areas within the supply chain are the responsiveness to …

Hotspot Cooling Performance For Confined Jet Impingement Cooling, Tanvir Ahmed Chowdhury

Electronic Theses and Dissertations, 2020-2023

The current trend in microelectronics is to manufacture devices with increased computational powers and reduced size. These devices with increased power densities are consequently subject to extreme thermal loads. Thermal management of these power loads is extremely challenging. The presence of the hotspots can make this challenge even more difficult. Jet impingement cooling is one of the top candidates for removing such extreme heat fluxes in microelectronics. Jet impingement cooling can achieve heat transfer coefficients (HTCs) due to its normal incident flow-field and ability to thin the local thermal boundary layer in the stagnation region. This dissertation presents the hotspot …

Incongruous Surrealism Within Narrative Animated Film, Daniel Mccabe

Electronic Theses and Dissertations, 2020-2023

A pop music video is a form of media containing incongruous surrealistic imagery with a narrative structure supplied by song lyrics. The lyrics' presence allows filmmakers to digress from sequential imagery through introduction of nonlinear visual elements. I will analyze these surrealist film elements through several post-modern philosophies to better understand how this animated audio-visual synthesis resides in the larger world of art theory and its relationship to the popular music video. This analysis coincides with the practical and theoretical experimentation evident in the film companion to this thesis, Slapper the Cat: A Musical Cartoon. A long-form animated music video …

Use Of Mechanical Pronation Beds In Acute Respiratory Distress Syndrome In The Intensive Care Unit: An Integrative Review Of The Literature, Amanda St. John

Honors Undergraduate Theses

The increasing rate of Acute Respiratory Distress Syndrome (ARDS) reinforces the need for additional resources to assist clinical staff with an individual's care and recovery. Pronation therapy involves physically rotating an individual from the posterior position to the prone position. Pronation therapy has successfully been used for individuals diagnosed with ARDS in Intensive Care Units for decades. However, manual pronation maneuvers by staff members poses risks for those who are critically ill and risk of physical injury to caregivers. Mechanical pronation beds have revolutionized the art of pronation therapy, minimizing risks, and decreasing possibility of kinking or pulling out life …

Race-Based Adjustment In Egfr Algorithms: An Integrative Literature Review, Leah E. Utt

Honors Undergraduate Theses

Background: There is a 3-fold risk of developing end stage kidney disease in Non-Hispanic African Americans compared to Non-Hispanic White Americans (Centers for Disease Control and Prevention, 2017). Estimated glomerular filtration rate (eGFR), one of the fundamental algorithms for coordinating treatment for kidney disease which factors in age, race, gender, and levels of creatinine, may pose an issue in this vulnerable population. Currently African Americans receive a correction factor between 1.21 and 1.16 to their eGFR to adjusting the value higher, potentially impacting appropriate kidney disease classification, and delaying beneficial interventions (National Kidney Foundation, 2020).

Methods: A systematic literature search …

A Breathing Intervention To Enhance Cardiac Regulation And Mitigate Stress In Police Cadets, Samantha Napier

Electronic Theses and Dissertations, 2020-2023

Maintaining effective performance under stress can be challenging, especially in the dangerous environments encountered by the police and military personnel. This document reviews the impact of stress on performance, discusses breath interventions as a means of stress mitigation, suggests an approach for exploring the value of a breath intervention in police cadets, tests, analyzes, and discusses a test of this method and results. Biofeedback training can be used to produce resonance breathing that is synchronized with heart rate and optimizes heart rate variability (HRV). This intervention was expected to alleviate physiological and subjective stress responses. Studies reviewed confirm that higher …

Documenting Outdoor Simulated Scenes With Photogrammetry: Methods For Improving Dappled Lighting Conditions, Caroline Jasiak

Electronic Theses and Dissertations, 2020-2023

The primary goal of a forensic archaeologist is to reconstruct the context of scenes involving skeletal remains using recording and mapping methods. However, the outdoor locations of most forensic archaeology scenes can result in difficulties when recording and mapping scenes. While close-range photogrammetry (CRP) has been considered for documenting context of forensic sciences, this method lacks a sufficient procedural basis to guide data recording when encountering problematic environmental conditions. The purpose of this research is to test how light correction tools, a sheet and artificial lights, could improve harsh lighting conditions. Photographs were taken of controlled scenes with skeletal remains …

Understanding Forearm Muscle Coordination In Children, Miguel Gonzalez

Electronic Theses and Dissertations, 2020-2023

A combination of surface electromyography (EMG) and pattern recognition algorithms have led to improvements in the functionality of upper limb prosthetics. This method of control relies on user's ability to repeatedly generate consistent muscle contractions. Research in EMG based control of prosthesis has mainly utilized adult subjects who have fully developed neuromuscular control. Little is known about children's ability to generate consistent EMG signals necessary to control artificial limbs with multiple degrees of freedom. To address this gap, two experiments were designed to validate and benchmark an experimental protocol that quantifies the ability to coordinate forearm muscle contractions in able-bodied …

Visual Learning Beyond Human Curated Datasets, Muhammad Abdullah Jamal

Electronic Theses and Dissertations, 2020-2023

The success of deep neural networks in a variety of computer vision tasks heavily relies on large- scale datasets. However, it is expensive to manually acquire labels for large datasets. Given the human annotation cost and scarcity of data, the challenge is to learn efficiently with insufficiently labeled data. In this dissertation, we propose several approaches towards data-efficient learning in the context of few-shot learning, long-tailed visual recognition, and unsupervised and semi-supervised learning. In the first part, we propose a novel paradigm of Task-Agnostic Meta- Learning (TAML) algorithms to improve few-shot learning. Furthermore, in the second part, we analyze the …

Optimizing Peer Selection Among Internet Service Providers (Isps), Shahzeb Mustafa

Electronic Theses and Dissertations, 2020-2023

Connections among Internet Service Providers (ISPs) form the backbone of the Internet. This enables communications across the globe. ISPs are represented as Autonomous Systems (ASes) in the global Internet and inter-ISP traffic exchange takes place via inter-AS links, which are formed based on inter-ISP connections and agreements. In addition to customer-provider agreements, a crucial type of inter-ISP agreement is peering. ISP administrators use various platforms like AP-NIC and NANOG networking events for establishing new peering connections in accordance with their business and technical needs. Such methods are often inefficient and slow, potentially resulting in missed opportunities or sub-optimal routes. The …

Improving Matching And Classification Through Deep Learning Of Structure And Varying Illumination, Sarah Braeger

Electronic Theses and Dissertations, 2020-2023

Convolutional networks have driven major advances in computer vision in recent years. The design of deep architectures, loss functions, and the curation of large, diverse datasets have furthered progress in many applied computer vision tasks. How data is represented to a network guides feature discovery and must be carefully considered in order to maximize performance on any applied task. We introduce novel input representations and associated architectural techniques to better utilize them such as complementary loss terms and network structure. We demonstrate the impact of these approaches on classification and matching tasks which involve shape and varied illumination. We show …

Improving Performance And Flexibility Of Fabric-Attached Memory Systems, Vamsee Reddy Kommareddy

Electronic Theses and Dissertations, 2020-2023

As demands for memory-intensive applications continue to grow, the memory capacity of each computing node is expected to grow at a similar pace. In high-performance computing (HPC) systems, the memory capacity per compute node is decided upon the most demanding application that would likely run on such a system, and hence the average capacity per node in future HPC systems is expected to grow significantly. However, diverse applications run on HPC systems with different memory requirements and memory utilization can fluctuate widely from one application to another. Since memory modules are private for a corresponding computing node, a large percentage …

Contextual Understanding Of Sequential Data Across Multiple Modalities, Sangwoo Cho

Electronic Theses and Dissertations, 2020-2023

In recent years, progress in computing and networking has made it possible to collect large volumes of data for various different applications in data mining and data analytics using machine learning methods. Data may come from different sources and in different shapes and forms depending on their inherent nature and the acquisition process. In this dissertation, we focus specifically on sequential data, which have been exponentially growing in recent years on platforms such as YouTube, social media, news agency sites, and other platforms. An important characteristic of sequential data is the inherent causal structure with latent patterns that can be …

Mechanics Of Low Dimensional Biomimetic Scale Metamaterials, Hossein Ebrahimi

Electronic Theses and Dissertations, 2020-2023

Combination of topology and material could play an important role in giving rise to nontraditional behavior in mechanical structures and is a typical strategy in nature. Topology is concerned with the geometrical and spatial properties of the objects, which are preserved under continues mechanical deformation of the object such as stretching, bending, twisting, etc. In this work, we focus on structures based on fish scale inspired surface topology. The utilized idea for surface topology is a bioinspired design on the substrate of biological scale-covered systems. Scales are a path breaking evolutionary adaptation that accompanied vertebrate evolution for the past 500 …

Fine-Grained Lower Bounds For Problems On Strings And Graphs, Gary Thomas Hoppenworth

Honors Undergraduate Theses

The motivation of this thesis is to present new lower bounds for important computational problems on strings and graphs, conditioned on plausible conjectures in theoretical computer science. These lower bounds, called conditional lower bounds, are a topic of immense interest in the field of fine-grained complexity, which aims to develop a better understanding of the hardness of problems that can be solved in polynomial time. In this thesis, we give new conditional lower bounds for four interesting computational problems: the median and center string edit distance problems, the pattern matching on labeled graphs problem, and the subtree isomorphism problem. These …

Motor Control System For Near-Resonance High-Cycle Fatigue Testing, Samer K. Armaly

Honors Undergraduate Theses

This research project develops a low-cost high-cycle fatigue (HCF) testing system comprised of an AC motor, variable frequency drive (VFD), eccentric cam, and feedback controller. The system acts as a forced harmonic oscillator leveraging mechanical resonance to vibrate a specimen at a frequency required to induce the testing's strain amplitudes.

This system depends highly on the material being tested. As such, the controller incorporates material characteristics. A frequency sweep measures the strain amplitude to characterize the specimen. Additionally, other measurements such as acceleration can be used as a proxy control variables for strain. A function converts the control variable to …

Influence Of Ecm Composition And Intracellular Calcium On Endothelial Biomechanics And Prediction Of Cellular Stresses Using Machine Learning, Vignesh Aravind Subramanian Balachandar

Electronic Theses and Dissertations, 2020-2023

Endothelial cells, which form the inner layer of the vasculature, constantly interact with their external microenvironment called the extracellular matrix (ECM) by exerting contractile cell-substrate stresses called tractions and cell-cell stresses called intercellular stresses. This cellular mechanosensing can become aberrant and act as a precursor for many vascular pathological and physiological processes such as cancer metastasis, atherosclerosis, cell differentiation, migration, and morphogenesis. Also, intracellular calcium signalling plays an important role in endothelial cell motility and in maintaining vascular tone. Alteration in ECM composition has been linked to several pathologies, in fact, a transition to a fibronectin-rich matrix from a type …

Diffusion Biomarkers To Characterize Tissue Microstructure In Chronic Myocardial Infarction, Mohammad Tanjib Rahman

Electronic Theses and Dissertations, 2020-2023

Non-invasive imaging techniques to detect and characterize infarcted myocardium are critical for myocardial infarction (MI) prognosis and post-MI risk assessment. Many existing imaging techniques (such as T1-mapping) for MI detection require the use of contrast agents, which are not recommended for patients with renal failure. Cardiac diffusion tensor magnetic resonance imaging (cDTI), a non-contrast imaging technique, allows estimating the aggregate cardiomyocyte microstructure in healthy subjects and its remodeling as a result of cardiac diseases. Two main questions are investigated in this thesis: 1) how cDTI based biomarkers can characterize microstructural changes occurring post-MI; and 2) if cDTI based biomarkers can …

Optimization Of A Wing Supporting A Coaxial Rotor For Multiple Flight Conditions, Tadd Yeager

Electronic Theses and Dissertations, 2020-2023

Rotor-powered drones continue to grow in popularity in private and government sectors. The use of these drones in challenging environments and in high stakes applications calls for a certain level of robustness and redundancy. Often, these drones are equipped with sets of paired coaxial rotors, which not only improve the performance of the vehicle, but also ensure that a failure of one motor does not constitute the failure of the whole vehicle. Some applications such as extraterrestrial exploration, which use these coaxial rotors, can benefit from a wing shaped rotor arm to reduce drag and increase lift, extending mission lifetime. …

Eeg-Based Signatures Of Isometric Arm Forces By Females At Different Levels Of Physical Exertion And Comfort, Mahjabeen Rahman

Electronic Theses and Dissertations, 2020-2023

In recent years, electroencephalography (EEG) has become a valuable technique for ergonomics studies of physical activities and other real-life tasks. Since the perception of force exertion is influenced by various psychophysical, cognitive, and social factors, different subjective measures have been traditionally used to measure the perception of physical exertion and related body discomfort. Along with the subjective measures, research showed that neural signals are also necessary objective measures to understanding human perception of physical tasks. However, EEG signatures of different physical exertion levels and perceived physical comfort have not been explored. The main objective of this study was to investigate …

Damping And Ejection Of Sloshing Liquid Drops From Elastic Substrates, Md Erfanul Alam

Electronic Theses and Dissertations, 2020-2023

Liquid slosh is a potential source of disturbance of the motion of a moving structure. In this thesis, we probe the damping technique of sessile drop by absorbing a portion of the kinetic energy. The sloshing dynamics are typically represented by a mechanical model of a spring mass damper. However, damping by drop sloshing is dependent on viscosity, surface tension, drop size and drop location. We explore highly-coupled fluid-solid mechanics using singular liquid drop with varying viscosity and surface tension resting on a millimetric cantilever. Cantilevers are displaced 0.6 mm and their free end is allowed to vibrate freely. Cantilever …

Northerners' Perspectives On American Emancipation And The End Of Russian Serfdom, Mariana S. Kellis

Honors Undergraduate Theses

This thesis explores the various perspectives that Northern Americans had on Russian serfdom and its emancipation. This era was significant to both Russia and the United States because each country experienced tremendous reforms including the abolitions of their unfree labor institutions. Generally, Northern Americans viewed serfdom as a milder form of forced labor and suspected that it would be eradicated soon. Abolitionists used rumors of Russian emancipation to advocate for the end of American slavery. Diminishing the realities of serfdom in the American media was a way for abolitionists to condemn the brutality of American slavery by comparison. After the …

Rule-Following, Enculturation, And Normative Identity, Nicholas Odom

Honors Undergraduate Theses

Rule-following has been a controversial issue in professional philosophical literature since Wittgenstein's Philosophical Investigations. Many authors have developed accounts of rule-following along different lines, including those that naturalistically reduce rule-following to non-normative phenomena and those that take rule-following to be an irreducible aspect of cognition and agency. Hannah Ginsborg, a prominent contributor to rule-following literature, has developed a partially reductive account of rule-following, combining features of both reductionist and nonreductionist accounts. But naturalizing or internalistic theories of rule-following, or even Ginsborg's partial reduction of rule-following, ignore important facets of what it is to follow a rule, particularly its social …

The Sound Of Identity: Audios And Hashtags As Nexuses Of Practice On Tiktok, Lindsey Wright

Honors Undergraduate Theses

This study investigates TikTok audios and hashtags through the lens of digital literacy studies, using Ron Scollon's nexus of practice as a theoretical framework. The researcher sought to investigate literacy practices on TikTok, such as how lurkers and posters interact with the app in ways that both define and are defined by their individual identities. Relative to other social media platforms, there is a dearth of research on TikTok. This study contributes to the gap while also building off the findings of Kaye et al., who investigated authorship and (mis)attribution on the app, and Sachs et al.'s claim that Goffman's …

The Hidden Secrets Of Historical Artistry, Jennifer B. Musser

Honors Undergraduate Theses

When I began developing the video game concept for my thesis, I realized that I was one of the kids that grew up in a society where video games took prevalence over historical artistry. I, however, was unaware of the hidden secrets that resided in the art and how much they contribute to the video games I enjoy playing today. This thesis aims to provide the younger generations with an engaging and stimulating way to experience historical artistry, more specifically the Italian Renaissance, without having to consult a history book. I aim to provide enough detail on multiple aspects of …