397 Works

Communication Capability for a Simulation-Based Test and Evaluation Framework for Autonomous Systems

Ntiana Sakioti
The design and testing process for collaborative autonomous systems can be extremely complex and time-consuming, so it is advantageous to begin testing early in the design. A Test & Evaluation (T&E) Framework was previously developed to enable the testing of autonomous software at various levels of mixed reality. The Framework assumes a modular approach to autonomous software development, which introduces the possibility that components are not in the same stage of development. The T&E Framework...

From Compassion to Resistance: Lesbos Refugee Crisis

Luz Diaz
“What would I do if I wasn’t given freedom? I would protest every day.” This illustrates the empathy that locals in Lesbos shared with the struggles of refugees when the European Refugee Crisis arrived on the shores of Lesbos in 2015. Locals on the island helped refugees get off boats—or saved them from the water—and offered to take them to the city center to claim asylum. But soon, with the arrival of humanitarian aid organizations,...

Two Essays on Investor Attention, Investor Sentiment, and Earnings Pricing

Qiuye Cai
This dissertation proposes novel direct measures for both firm-level and market-level investor attention and investor sentiment and provides new empirical evidence on the effects of investor attention and investor sentiment on earnings pricing. The first essay proposes novel direct measures for both market-level and firm-level attention using user activity data from StockTwits.com. To the best of my knowledge, this is the first direct measure of market-level attention. By measuring market-level and firm-level attention separately, I...

Medical Specialty Camps: A Holistic Approach to Assist in the Management Of Diabetes

Takeyra Monique Collins
From toddlers to adolescents, poor medical regimen and adherence occurs as youth face adversities caused by type 1 diabetes mellitus (T1DM). This inquiry-based research sought to explore the process of promoting resilience to attain personal diabetes management through outcome-focused programming. This dissertation was structured in a three-paper format to highlight three sectors of a medical specialty camp to identify the significance of building resilience among youth with T1DM, incorporating family support, and providing service-learning opportunities...

I Had to Do the Reading: A Phenomenological Case Study of College English Students

Jennifer Eleanor Frank
The purposes of this qualitative phenomenological case study were to investigate multiple student experiences in a general elective introduction to literature course when music was added as an autonomously structured assignment. Music and song lyrics are no strangers to the classroom setting, but there is a gap in the literature examining the space where students can create meaningful links between music they enjoy and assigned course readings in college English. Informed by social constructivism and...

Longitudinal Brain Tumor Tracking, Tumor Grading, and Patient Survival Prediction Using MRI

Linmin Pei
This work aims to develop novel methods for brain tumor classification, longitudinal brain tumor tracking, and patient survival prediction. Consequently, this dissertation proposes three tasks. First, we develop a framework for brain tumor segmentation prediction in longitudinal multimodal magnetic resonance imaging (mMRI) scans, comprising two methods: feature fusion and joint label fusion (JLF). The first method fuses stochastic multi-resolution texture features with tumor cell density features, in order to obtain tumor segmentation predictions in follow-up...

The Effects of Interruption Relevance and Complexity on Primary Task Resumption and Mental Demand

Brandon Allan Fluegel
In the present study, undergraduate students viewed patient charts and entered numerical values from these charts into a medical record database. They were unexpectedly interrupted by secondary tasks that differed in relevance and complexity. The secondary tasks varied by whether they facilitated or inhibited (i.e., relevant or irrelevant) rehearsal of the suspended task and whether they placed a demand on working memory (i.e., high complexity or low complexity). The primary measures of interest were the...

Pulse Power Effects on Transient Plasma Ignition for Combustion

David Wayne Alderman II
Transient plasma ignition (TPI) uses highly non-equilibrium plasmas, driven by less than 100 nanosecond, high-voltage pulses, to initiate combustion. The effects of pulse repetition frequency (PRF) and ultrashort nanosecond rise times on TPI are investigated in this work using lean, stoichiometric, and rich air-fuel mixtures at atmospheric pressure. Experimental data show the transient plasmas driven by ultrashort rise time, high voltage pulses at high PRF’s enhance the combustion of lean or stoichiometric air-methane mixtures in...

Neglected Cultural Outcomes That Impact Hispanic-Serving Institution Policymaking

Amanda Kate Burbage
The Higher Education Act (HEA) Title V is designed to expand opportunities, increase attainment, and enhance institutional quality and stability of Hispanic-Serving Institutions (HSIs). The assessment of Title V goals relies on enrollment, retention, and graduation rates which reflect organizational outcomes that policymakers prioritized without deference to student population, institutional mission, and funding levels. Title V policymakers do not currently consider the ways HSIs centralize the racialized experiences of students and institutions do not uniformly...

DOD Mission Engineering and Integration Explorative-Exploitative Architecture for Technology Innovation

Jose L. Bricio-Neto
The ability of U.S. Department of Defense to achieve timely innovation in support of U.S. National Defense and Military Strategies continues to increase in significance. The growing challenges in U.S. Department of Defense (DoD) technological innovation in a context of global security and rapid pace of global competitiveness continue to reveal many shortcomings in current weapon systems development and acquisition practice. As the pace of technological innovation is accelerating, the DoD faces the challenge that...

Single-Stage, Venturi-Driven Desalination System

Brandon Proetto
Water demand is increasing at a rapid pace due to population increase, industrial expansion, and agricultural development. The use of desalination technology to meet the high water demands has increased global online desalination capacity from 47 million m^3/d in 2007 to 92.5 million m^3/d as of June 2017 [49]. Membrane and thermal processes are the two mainstream desalination categories used worldwide for desalination plants. Reverse Osmosis (RO) is the most widely used membrane process and...

Computational Analysis of Antipode Algorithms for the Output Feedback Hopf Algebra

Lance Berlin
The feedback interconnection of two systems written in terms of Chen-Fliess series can be described explicitly in terms of the antipode of the output feedback Hopf algebra. At present, there are three known computational approaches to calculating this antipode: the left coproduct method, the right coproduct method, and the derivation method. Each of these algorithms is defined recursively, and thus becomes computationally expensive quite quickly. This motivates the need for a more complete understanding of...

Challenges of Designing and Operating a Pilot Scale Short Residence Time Continuous Hydrothermal Flash Hydrolysis Reactor for High Slurry Load Biomass Processing

Mason James Martin
Increasing demand for renewable energy, fuels, and bioproducts has resulted in a push for increasingly efficient and economically favorable biomass pretreatment methods. Flash Hydrolysis, (FH) a promising biomass pretreatment method, has been extensively studied at a laboratory scale. FH employs a continuous subcritical hydrothermal process capable of fractionating microalgae for lipid and protein recovery. FH is unique in that the residence time is very short (~ 10 s). Maintaining this residence time was key in...

Gesture Based Control of Semi-Autonomous Vehicles

Brian Sanders
The objective of this investigation is to explore the use of hand gestures to control semi-autonomous vehicles, such as quadcopters, using realistic, physics based simulations. This involves identifying natural gestures to control basic functions of a vehicle, such as maneuvering and onboard equipment operation, and building simulations using the Unity game engine to investigate preferred use of those gestures. In addition to creating a realistic operating experience, human factors associated with limitations on physical hand...

The Effect of Task Interruptions and Reliable Cues on Detection Changes Within Dynamic Scenes

Kimberly N. Perry
Interruptions are a common problem for attention and pose a threat to visual task performance. The Memory for Goals (MFG) theory suggests that strongly and accurately encoded cues can assist the ability to resume a primary task after an interruption (Altmann & Trafton, 2002). Encoded cues can undergo an activation decay during an interruption and become forgotten. Currently, there has been limited research on how visual interruptions affect cued recall within a dynamic environment. Thus,...

Estimation of Correlation Confidence Intervals via the Bootstrap: Non-Normal Distributions

John Mart V. DelosReyes
Estimating confidence intervals (CIs) for the correlation has been a challenge. The challenge stems from the metamorphic nature of the sampling distribution of the correlation being bound by-1≤ρ≤1. The nonparametric nature of the bootstrap makes it a good option for estimating correlation CIs. However, there have been mixed results about the robustness of bootstrap CIs for the correlation with non normal data. This had led the literature to suggesting the use of transformation methods to...

Impact of Emotional Competencies on Current E-Cigarette Use Within a Young Adult Sample

Laurel O. Brockenberry, Kelli England & Paul T. Harrell
Significance: Maladaptive emotional states are important drivers of tobacco use, but the mediating factors are poorly understood, particularly for e-cigarette use. Given that e-cigarette use has increased in prevalence and popularity, research examining motivating factors to engage in use is necessary. Methods: Survey data were collected from youth (18-25) attending a four-year university (N = 216, M-age = 20.41, 36.6% African American). Respondents answered questions about emotion dysregulation (Difficulties in Emotion Regulation Scale; DERS), positive/negative...

Reported Barriers to AAC Service Delivery & Post-Professional Learning Preferences Among Speech-Language Pathologists

Meredith Laverdure & Rachel K. Johnson
This mixed methods experimental study used a survey to identify speech-language pathologists’ perceptions, including preparedness to provide augmentative-alternative communication (AAC) services to individuals with complex communication needs and learning preferences for post-professional training. Following certification standard changes in 2005 and 2014, the American Speech-Language-Hearing Association (ASHA) now requires instruction and clinical experiences during graduate studies across nine major content areas, including the use of AAC modalities. Prior to this change, the number of preservice programs...

The Impact of Continuous Versus Intermittent Physical Activity on Vascular Function While Sitting

Benjamin Lieu & Leyrn Reynolds
Previous studies demonstrate prolonged sitting impairs blood vessel function. However, these studies also demonstrate breaking up sitting time by exercise maintains endothelial function. No one has examined whether a continuous bout of exercise prior to sitting is as effective as breaks in sitting on maintaining endothelial function. PURPOSE: This study examined whether continuous versus intermittent bouts of exercise are more effective at maintaining vascular health while sitting. METHODS: 5 males (age: 36±18, BMI: 22±5) and...

The Impact of Blood Flow Restrictive Exercise on Endothelial Function

Hannah Twiddy, Leryn J. Reynolds & Robbie Pittman
Blood flow restriction training (BFRT) is the occlusion of blood flow during resistance exercise to elicit enhanced skeletal muscle hypertrophy while lifting lower weights compared to standard resistance training. Research has shown BFR with low intensity resistance training to elicit similar results in skeletal muscle hypertrophy when compared to higher intensity resistance exercise. Although BFR demonstrates similar levels of skeletal muscle hypertrophy, no research has examined the effects of BFR exercise on brachial artery endothelial...

Olfactory Behavioral Responses of Mosquito Vectors to Select Attractants and Floral Scents as Related to Circadian Rhythms and Photoperiod Regimes

Bernadette A. Ferraro
This dissertation discusses mosquito behavioral activities involving circadian rhythms defined as insect sensitivity to select of chemical volatiles that vary throughout the 24-hour day. Circannual rhythms occur over seasons varying in photoperiod, defined as the seasonal cycle of light and darkness. These cycles can be endogenously controlled by circadian clocks. The impetus for this research was initiated when reading about the neglected temporal dimension in the context of insect chemical ecology, including insect olfaction. It...

Network Approaches to Elucidate the Determinants of Protein Topology and Stability

Zeinab Haratipour
Predicting three-dimensional structures of proteins from sequence information alone, remains one of the most profoundly challenging and intensely studied problems in basic science. It has uniquely garnered the interdisciplinary efforts of biologists, biochemists, computer scientists, mathematicians and physicists. The advancement of computational methods to study fundamental features of proteins also enables insights that are either difficult to explore experimentally or complimentary to further interpret experimental data. In the present research and through the combined development...

Engineering Management Competencies: A Framework for Present and Future Engineering Environments

Christopher Vaughn Barrett
Managing and directing engineering requires engineering management competencies. Although perspectives may differ concerning competencies for engineering management, identifying competencies can direct and improve management. The purpose of this research is to develop a framework of competencies for engineering managers using an inductive research design. Development of this engineering management competency framework involves an exploration of three primary research questions. The first question is ‘What are the current competencies for engineering managers?’ The response to this...

Coping Self-efficacy as a Potential Moderator of the Relationship Between Sexual Orientation and Negative Mental Health Outcomes

James M. Macchia
Sexual minority individuals (i.e., those who identify as a sexual orientation other than heterosexual) have consistently been linked to an increased risk of negative mental health outcomes. The process of coping can impact the content and severity of said outcomes, and one’s ability to cope is often predicted by the concept known as coping self-efficacy (i.e., one’s belief in his or her ability to cope). This study aimed to assess the effects of sexual orientation,...

The State of the Region: Hampton Roads 2020

This is Old Dominion University’s 21st annual State of the Region Report. While it represents the work of many people connected in various ways to the university, the report does not constitute an official viewpoint of Old Dominion, its president, John R. Broderick, the Board of Visitors, the Strome College of Business or the generous donors who support the activities of the Dragas Center for Economic Analysis and Policy. Although our devotion to this work...

Registration Year

  • 2020
    397

Resource Types

  • Text
    397

Affiliations

  • Old Dominion University
    376
  • Georgia Institute of Technology
    2
  • Eastern Virginia Medical School
    2
  • A.T. Still University
    2
  • Science Museum of Virginia
    1
  • University of Washington
    1
  • University of Wollongong
    1
  • Ball State University
    1
  • Bridgewater College
    1
  • University of North Carolina at Asheville
    1