Digital Commons Network^™

An Interaction Between Mental Integration And Levels Of Automation: An Analytic Approach Applying Systems Factorial Technology, Shelby Kate Scarbrough Long

Psychology Theses & Dissertations

Automation has become nearly ubiquitous in modern society, supporting human performance in personal and professional tasks. Recent works have begun to focus on human-automation performance in speeded perceptual-cognitive tasks using workload capacity analysis, a novel mathematical analysis to measure efficiency of a human-automation team. The present dissertation examined how level of automation and demand for mental integration of information influence human-automation efficiency. Participants performed a multi-element probabilistic decision task with or without the assistance of an automated aid where level of automation and task demand were manipulated. Experiment 1 employed a mixed design with Automation (present vs. absent) and Task …

Comprehensive Study Of Energy Capturing, Conversion, And Transportation Behaviors In A Piezoelectric Vibration Energy Harvesting System, Bingqi Zhao

Mechanical & Aerospace Engineering Theses & Dissertations

Piezoelectric vibration energy harvester (PEH) is one of the hottest research areas to address renewable energy issues with over 10,000 journal articles published in the last two decades. However, several critical issues, such as the proof mass effects, electrical impedance, mechanical resonance, and energy charging processing, remain open. This dissertation presents a comprehensive study addressing the above issues.

To obtain reliable results, a professional quality flextensional PEH (FPEH) and multiple comprehensive experimental methods were developed, and ANSYS FEM modelling was used. Study of the proof mass effect indicated that the generated voltage linearly increased with the weight ratio of the …

Computer Based Modeling For Small E-Vtol Propeller Performance, Ege Konuk

Mechanical & Aerospace Engineering Theses & Dissertations

The emerging field of urban air mobility (UAM) offers a novel transportation method for civil, commercial, and military applications. Vertical take-off and landing (VTOL) configurations present challenges for performance prediction during crucial flight operations. An advanced computational framework for predicting propeller performance in electric vertical takeoff and landing (eVTOL) aircraft during transition flight is essential for future concept designs. This research extends the Blade Element Momentum Theory (BEMT) to model propeller behavior at high incidence angles, crucial for eVTOL operation.

The study begins with a review of tilt-wing/rotor configurations for eVTOLs and tackles the complex aerodynamic phenomena associated with rotors …

A Systems Theory-Based Framework For Uncertainty In Complex System Governance, Teresa Anne Crater

Engineering Management & Systems Engineering Theses & Dissertations

Complex systems are all around. A complex system is a system whose collective behavior is more than the behavior exhibited by the individual parts. Such a system is characterized by an exponential increase in information, complexity, ambiguity, emergence, and high levels of uncertainty (Jaradat, 2015). Uncertainty is intrinsic to complex systems. Uncertainty refers to epistemic situations involving imperfect or unknown information. Uncertainty can refer to the chance of certain anticipated outcomes occurring, or it can refer to the unknown events that are not foreseeable as to when or if one might occur. It applies to predictions of future events, to …

Use Of The Integrated Practice Assessment Tool (Ipat) To Evaluate The Clinical Learning Environment For Counselors-In-Training, Jessica Lloyd-Hazlett, Stacy Ogbeide, Heather Trepal, Mercedes Ingram, Swathi Weaver

Journal of Human Services Scholarship and Interprofessional Collaboration

The need for behavioral health integration (BHI) in primary care continues to grow to address the behavioral health needs of patients and families. Developing a competent interprofessional workforce to operate in primary care behavioral health settings necessitates BHI-literate clinical learning environments, as well as tools to evaluate and assist in the integration of services appropriate for BHI training and supervision. The Integrated Practice Assessment Tool (IPAT; Waxmonsky et al., 2014) is an instrument that assesses the level of BHI at a primary care clinic. This paper discusses an example of an implementation approach to examine BHI levels with the IPAT …

Leadership In Collaborative Emergency Management For Compound Hurricane-Pandemic Threats: Insights From Practitioners' Experiences, Norah Alshayhan, Saige Hill, Marina Saitgalina, Juita-Elena (Wie) Yusuf

School of Public Service Faculty Publications

Emergency management is a key government function for mitigating risks and reducing the impacts of disasters. Emergency management leaders play a critical role in preparing for and responding to disasters whose impacts are exacerbated by a pandemic. Using the example of the compound threat of hurricanes and the COVID-19 pandemic, this qualitative research uses insights from emergency management professionals to describe collaborative approaches and leadership skills that help balance the needs for stability and flexibility. Data collected using focus groups and one-on-one interviews with emergency management professionals highlight that collaboration involved existing and new partners in a changing and uncertain …

Simulation Modeling Of An Earth Entry System And Solar Radiation Pressure Module Development, Michael Sean Manwell

Mechanical & Aerospace Doctoral and Master's Level Projects and Papers

Several trajectory simulation tools are used to model different phases of the Approach, Entry, Descent and Landing (AEDL) phase of NASA’s Mars Sample Return Campaign. Working towards a single simulation tool that models all AEDL phases, this project utilizes Program to Optimize Simulated Trajectories II to simulate the 72-hour exoatmospheric phase of AEDL up till the point of Earth atmospheric entry. This involves developing a new feature for POST2 that captures the forces and moments caused by solar radiation pressure (SRP). Generalizing the vehicle geometry as a combination of primitive shapes, a generalized SRP module was created and implemented into …

The Hidden Impact Of Sociocultural Determinants In Adolescence, Lauren B. Robins, Nicholas Schmoyer, Atiya Smith, Krystal L. Clemons, Jill Kivikoski

Journal of Human Services Scholarship and Interprofessional Collaboration

This study, guided by the Social Determinants of Health framework and Social Ecological Model, examined how SDOH impact the presence of anxiety during adolescence. This study set out to understand what sociocultural determinants predict anxiety, using the 2018 National Survey of Children’s Health dataset. The analysis included a logistic regression to determine the predictability of SDOH on anxiety in adolescence. The results indicated that various SDOH are significant predictors of anxiety, while also indicating that the absence of adverse SDOH predicts the lack of anxiety. Further, unique findings related to race/ethnicity, age, and gender set the stage for additional research …

Explainable Artificial Intelligence: Methods And Evaluation, Gayane Grigoryan

Engineering Management & Systems Engineering Theses & Dissertations

A wide array of techniques within explainable artificial intelligence (XAI) have been developed to measure the importance of features in machine learning models. A notable portion of these methods draws upon principles of cooperative game theory (CGT), with the Shapley value emerging as a widely used solution concept. Despite the rising prominence of the Shapley value, other promising solutions from cooperative game theory—such as the Nucleolus, Banzhaf power index, Shapley-Shubik power index, and solutions to conflicting claims problems—have been comparatively overlooked, even though they hold significant potential. In this dissertation, multiple XAI methods based on these other CGT solutions are …

Development Of A Conceptual Framework For Complex System Governance (Csg) Performance Measurement, James Hartwell Rutherford

Engineering Management & Systems Engineering Theses & Dissertations

Within the Complex System Governance (CSG) paradigm, system performance is regulated by nine metasystem governance functions, which provide control, communication, coordination, and integration. However, CSG has lacked a fully developed model or language to richly articulate system performance at a conceptual level. The purpose of this research was to develop a systems theory-based conceptual framework to measure the performance of CSG metasystem governance using an inductive research design.

Although ‘good performance’ may seem like an obvious idea, the current literature on performance measurement across many disciplines and contexts contains vastly inconsistent uses of the word ‘performance.’ Both researchers and practitioners …

Harnessing Social Media For Disaster Response: Intelligent Identification Of Reliable Rescue Requests During Hurricanes, Wael Khallouli

Engineering Management & Systems Engineering Theses & Dissertations

Hurricanes pose a significant threat to both human lives and infrastructure. Decision-makers face substantial challenges during such events, as they must act quickly to address victims’ needs. Social media platforms provide a valuable source for quick and real-time information. Recent hurricane events have shown that people turn to social media to call for help when official communication channels, such as 911, are overwhelmed. However, extracting actionable information from the massive number of messages posted on social media is challenging. Furthermore, verifying social media messages posted by the public is a critical concern for disaster response practitioners, making them hesitant to …

Zero Dynamics Attacks On Unknown Bilinear Systems: Vulnerability And Detection, Mohammad Aminul Haq

Electrical & Computer Engineering Theses & Dissertations

Critical infrastructure requires a safe and secure operating environment because of its significant impact on society. Its large-scale size and distributed sensors and actuators make it vulnerable to cyber-physical attacks. A zero dynamics attack is a type of cyber-physical attack where an adversary keeps the output of the target constant (classically zero), while forcing some of the internal states to deviate from their nominal values. Most of the existing work in the literature assumes the system dynamics are linear and available to an adversary. The first goal of this dissertation is to show that an adversary can successfully execute a …

Privacy-Preserving Deep Learning Framework For Iot Malware Detection, Sabbir Ahmed Khan

Computer Science Theses & Dissertations

Cyberattacks on IoT devices are accelerating at an unprecedented rate, largely driven by IoT malware activities. The IoT malware attacks typically comprise three stages: intrusion, infection, and monetization. Existing IoT malware detection methods fail to identify malicious activities at the intrusion and infection stages and thus cannot stop potential attacks timely. In our research, we have leveraged power side-channel information as input to our deep learning model to identify malware at early stages of intrusion on IoT devices. But, deploying a resource-intensive deep learning model on highly resource-constrained IoT devices is a significant challenge. Consequently, utilizing a Machine Learning as …

Synthesis And Characterization Of Cobalt-Based Complexes And Metal-Organic Frameworks For Hydrogen Evolution Catalysis Under Acidic Conditions, Elizabeth A. Tonsel-White

Chemistry & Biochemistry Theses & Dissertations

The synthesis of two cobalt(II) complexes: the novel complex [Co(phen)₃]₂[Co(pytc)₂]•16.25H₂O 1 and the previously reported [Co(bpy)₃](OH)₂•7H₂O 2, along with a cobalt(II/III)-containing MOF, Co-PPF2, previously reported as well, was achieved. These complexes were characterized by elemental analysis, X-ray crystallography, microscopy, conductivity measurements, TGA, SEM, CV , and UV-visible , and FTIR spectroscopies. From the CV scan rates, diffusion coefficients for complexes 1 and 2 were determined to be 1.0 × 10⁻⁶ cm² s⁻¹ and 4.8 × 10⁻⁷ cm² s⁻¹. Electrocatalytic studies with complexes 1 and 2 revealed insights into the mechanistic aspects of …

Prevalence Of Sexuality Implicit Bias In Entry-Level Dental Hygiene Students – A Pilot Study, Monica Mercedez Drew

Dental Hygiene Theses & Dissertations

Purpose: Bias and discrimination may create barriers and affect the delivery of culturally competent care to sexual minorities. An awareness of biases early in education may promote equitable care and increase the quality of oral healthcare delivered to diverse populations. The purpose of this study was to determine the prevalence of sexuality-implicit attitudes in entry-level dental hygiene students at one university. Methods: This cross-sectional study included a convenience sample of junior and senior dental hygiene students (n=74) and was determined exempt by a university Health Sciences Human Subjects Review Committee (2151633-2). The Implicit Associations Test (IAT) is a validated tool …

Who Wrote The Scientific News? Improving The Discernibility Of Llms To Human-Written Scientific News, Dominik Soós

Computer Science Theses & Dissertations

Large Language Models (LLMs) have rapidly advanced the field of Natural Language Processing and become powerful tools for generating and evaluating scientific text. Although LLMs have demonstrated promising as evaluators for certain text generation tasks, there is still a gap until they are used as reliable text evaluators for general purposes. In this thesis project, I attempted to fill this gap by examining the discernibility of LLMs from human-written and LLM-generated scientific news. This research demonstrated that although it was relatively straightforward for humans to discern scientific news written by humans from scientific news generated by GPT-3.5 using basic prompts, …

A Kinematic Analysis Of The Shoulder During The Volleyball Attack Using Euler And Helical Axis Methods, Victoria Jolliff

Biomedical Engineering Theses & Dissertations

The shoulder is a complex joint with a wide range of motion, including flexion, extension, abduction, adduction, and internal and external rotation. In volleyball, repetitive overhand movements can cause shoulder overuse injuries. The primary offensive move, the attack, involves the approach, arm cocking, arm acceleration, and follow-through phases. Motion capture analysis and techniques like calculating Euler angles and rotation about a mean helical axis can evaluate shoulder movements. This study aimed to calculate shoulder movements during each phase of the volleyball attack using the Euler angle YXY sequence and the helical axis method. Different attack types, such as cross-court and …

On Weighted Sequence Spaces, Gilbert D. Acheampong

Mathematics & Statistics Theses & Dissertations

The space ℓ^p,α of complex sequences a = (a₀,a₁,a₂, . . .) for which

∞

∥a∥p,α = ( Σ|ak|^p(k+1)^α)^1/p < ∞

k=0

is studied. Each such sequence can be identified with the analytic function with power series

∞

f (z) = ∑ akz^k.

k=0

In this setting, the point evaluation and the difference quotient mappings are shown to be bounded; the cases are identified in which ℓ^p,α is boundedly contained in ℓ^r,β . …

An Examination Of The Perceptions Of Campus Safety Among Full-Time Faculty At Virginia Community Colleges, Hailey Ann Hermosa

Educational Leadership & Workforce Development Theses & Dissertations

The view that colleges are generally safe has been challenged by threats of violence on campuses across the country, causing fear among stakeholders. Community college faculty are not immune to crime-related fear on campus; however, the research has largely ignored this population. This research serves to fill that gap.

The purpose of this nonexperimental quantitative study was to examine perceptions of campus safety among full-time faculty at Virginia community colleges. An electronic Likert-type scale survey was disseminated to a sample of 472 full-time faculty throughout seven Virginia community colleges of varying sizes. Of those, 135 (28.7%) voluntarily participated in the …

Surfacing Text Changes In Archived Webpages, Lesley Frew

Computer Science Theses & Dissertations

Webpages change over time, and web archives hold copies of historical versions of webpages. Users of web archives, such as journalists, want to find and view changes on webpages over time. However, the current search interfaces for web archives do not adequately support this task. For the web archives that include a full-text search feature, multiple versions of the same webpage that match the search query are shown individually without enumerating changes, or are grouped together in a way that hides changes. We present a change text search engine that allows users to find changes in webpages. We describe the …

Tracing The Development Of Trust In Automation/Autonomy In A Multitasking Environment, Tetsuya Sato

Psychology Theses & Dissertations

Future Advanced Air Mobility (AAM) operations will likely involve autonomous systems that exceed the capabilities of a typical automation. However, human operators could use such systems counterproductively by either misusing unreliable systems or disusing reliable systems. One determinant for inappropriate use of autonomous systems is trust. Human factors theorists proposed numerous ways to characterize trust such as the tripartite model of trust that describes the bases of trust in automation (i.e., performance, process, and purpose; Lee & See, 2004). Previous works have indicated that participants rated lower performance- and process-based trust toward the automation when the tracking task required more …

Accelerating The Efficiency Of Multiscale Hybridizable Discontinuos Galerkin Methods For Flows In Heterogeneous Media, Tony Charles Haines

Mathematics & Statistics Theses & Dissertations

A plethora of scientific and engineering problems encountered are multiscale in nature. This multiscale feature often influences simulation efforts wherever large disparities in spatial scales are experienced. Notable examples include composite materials, fluid flow through porous media and turbulent transport in high Reynolds number flow. Although there are promising results from the advancement of modern supercomputer, obtaining direct numerical solution of multiscale problems is very laborious. This difficulty stems from the tremendous amount of computer memory and CPU time required. Parallel computing may be one obvious choice in remedying this issue. However, the complexity and size of the discrete problem …

The Years Of Embers In Mauritania: Ethnicity And Narratives, Hawa Saidou Barane Ba

Graduate Program in International Studies Theses & Dissertations

The borders in Africa were drawn according to the interests of colonial powers and without consideration of the continent’s ethnic, cultural, and linguistic realities. Thus, roughly 80% of African countries borders were drawn without considering the crucial and pre-existing realities of pre-colonial African societies, splitting ethnically and culturally homogenous groups and grouping diverse others under the same political unit. (Beck, 1993; Lefebvre, 2011). Consequently, many African countries end up with an ethnically diverse population that faces the challenge of living harmoniously together in social cohesion, creating an environment prone to ethnic conflicts, political instabilities, and weak national identities. Mauritania, for …

Process Modeling Of Composites For Automated Fiber Placement, Von Clyde Jamora

Mechanical & Aerospace Engineering Theses & Dissertations

Fiber-reinforced composites are available in various material systems, each requiring specific manufacturing techniques to exploit their unique properties fully. Systems such as woven fabrics and preimpregnated fibers employ distinctive methods to harness these properties effectively. For instance, non-crimp fabrics (NCF) use high-pressure resin transfer molding and prepregs, like IM7-8552, use manufacturing method called automated fiber placement (AFP). However, these manufacturing processes often introduce deposition features that can evolve into defects. Their occurrence and impact on morphology must be predicted using experimentally informed finite element models. The research began with compaction experiments on NCF fabric, leading to the development of a …

Hydrologic Modeling Of The Lower Chesapeake Bay Watershed Using Hecc-Hms With Implications For Future Coupled Coastal Modeling, Christopher Leonard Frost

Civil & Environmental Engineering Theses & Dissertations

This study explores the hydrological methodology for modeling a coastal watershed basin using the US Army Corps of Engineers hydrologic software, HEC-HMS with an objective of being able to create riverine boundary conditions that could be applied to a coupled compound flood model. Compound flooding is defined as high water inundation event that occurs due to the simultaneous occurrence of multiple flooding drivers. The Atlantic Seaboard and the Gulf of Mexico regions of the United States account for most of the compound events observed in the United States with a higher occurrence caused by hurricanes from July to November. In …

Two Essays On Asset Prices Around Securities Class Action Lawsuits, Sounak Saha

Theses and Dissertations in Business Administration

Essay 1: Prior studies on securities class action lawsuits have found that there are large negative abnormal returns and an increase in short-selling activity in the days preceding the lawsuit filing. These findings have largely been attributed to anticipatory inference and private information. However, our analysis of a large sample spanning 2009-2019 reveals that more than half of the lawsuits had a public announcement about the law firm investigation in the days leading up to the lawsuit filing. Strikingly, we find that the average cumulative abnormal return during the 10-day pre-filing period was: (1) over -17% for lawsuits with a …

Leveraging Blockchain For Trust Enhancement In Decentralized Marketplaces: A Reputation System Perspective, Meshari Mohammd Aljohani

Computer Science Theses & Dissertations

Centralized marketplaces provide reliable reputation services through a central authority, but this raises concerns about single points of failure, user privacy, and data security. Decentralized marketplaces have emerged to address these issues by enhancing user privacy and transparency and eliminating single points of failure. However, decentralized marketplaces face the challenge of maintaining user trust without a centralized authority. Current blockchain-based marketplaces rely on subjective buyer feedback. Additionally, the transparency in these systems can deter honest reviews due to fear of seller retaliation. To address these issues, we propose a trust and reputation system using blockchain and smart contracts. Our system …

First Through The Black Glass Ceiling: Towards Understanding The Communication Of Successful “First” Black Women Of Martinsville, Dasha L. Dillard

Communication & Theatre Arts Theses

The present study investigated the communication Black women ‘firsts’ of Martinsville, Virginia received and how resilience is communicated throughout one’s lives. Seven Black women who once worked or lived in Martinsville, Virginia were interviewed to discover the resilience themes through their professional lives and how resilience was a factor in how these women became ‘firsts’ in their respective fields. The study's findings show that certain personality and communication traits define and equip Black women to succeed and overcome adversities in today’s society. Furthermore, women who exhibited personality qualities such as assertiveness, faith, rebellion, and self-preservation and communication qualities such as …

A Study Of Learnability In Software As Perceived By Practitioners In User Experience And Learning Design Professions, Courtney N. Miller

STEMPS Theses & Dissertations

In the technology space, there are many factors that contribute to the marketability of software, including pricing and overall usefulness of the product (Jayathilaka, 2021). Many factors contribute to how usable a software is, including satisfaction, error prevention, memorability, efficiency, and learnability (Nielsen, 1994b). Learnability is one factor that may be affected or addressed by both user experience (UX) and learning design (LD) professional groups. While both fields address learnability, very few studies have been conducted to look at the UX interpretation of learnability as it relates to the LD interpretation (Elliott et al., 2002; Li et al., 2023). This …

Adopt: An Environmentally-Friendly System For Alerting Drivers To Occluded Pedestrians Traffic, Abrar Abdulrahman Alali

Computer Science Theses & Dissertations

The emergence of sensing technologies and vehicular communications has brought significant opportunities for enhancing pedestrian safety on city streets. However, existing solutions rely on costly technologies such as computer vision and trajectory prediction to detect crossing pedestrians, while they have limits in detecting pedestrians who are occluded by parked cars. Despite the presence of collaborative perception by surrounding vehicles and infrastructure, there is a notable absence of incorporating existing parked cars themselves due to their insufficiency in detecting pedestrians and communicating with other cars while they are turned off. Furthermore, accommodating pedestrians on streets has been linked to an additional …