Digital Commons Network^™

Energy-Optimal Guidance Of An Auv Under Flow Uncertainty And Fluid-Particle Interaction, Demuni Singith De Zoysa Abeysiriwardena

Electronic Theses and Dissertations

The work presented gives an energy-optimal solution to the guidance problem of an AUV. The presented guidance methods are for lower level control of AUV paths, facilitating existing global planning methods to be carried out comparatively more efficiently. The underlying concept is to use the energy of fluid flow fields the AUVs are navigating to extend the duration of missions. This allows gathering of comparatively more data with higher spatio-temporal resolution. The problem is formulated for a generalized two dimensional uniform flow field given a fixed final time and free end states. This allows the AUVs to navigate to certain …

A Decision Support Tool For Video Retinal Angiography, Sumit Laha

Electronic Theses and Dissertations

Fluorescein angiogram (FA) is a medical procedure that helps the ophthalmologists to monitor the status of the retinal blood vessels and to diagnose proper treatment. This research is motivated by the necessity of blood vessel segmentation of the retina. Retinal vessel segmentation has been a major challenge and has long drawn the attention of researchers for decades due to the presence of complex blood vessels with varying size, shape, angles and branching pattern of vessels, and non-uniform illumination and huge anatomical variability between subjects. In this thesis, we introduce a new computational tool that combines deep learning based machine learning …

Advanced Nanoscale Characterization Of Plants And Plant-Derived Materials For Sustainable Agriculture And Renewable Energy, Mikhael Soliman

Electronic Theses and Dissertations

The need for nanoscale, non-invasive functional characterization has become more significant with advances in nano-biotechnology and related fields. Exploring the ultrastructure of plant cell walls and plant-derived materials is necessary to access a more profound understanding of the molecular interactions in the systems, in view of a rational design for sustainable applications. This, in turn, relates to the pressing requirements for food, energy and water sustainability experienced worldwide. Here we will present our advanced characterization approach to study the effects of external stresses on plants, and resulting opportunities for biomass valorization with an impact on the food-energy-water nexus. First, the …

Bio-Inspired Visual Servo Control Of A Picking Mechanism In An Agricultural Ground Robot, Sinem Gozde Defterli

Electronic Theses and Dissertations

For a recently constructed disease detection agricultural ground robot, the segregation of unhealthy leaves from strawberry plants is a major task of the robot's manipulation subsystem in field operations. In this dissertation, the motion planning of a custom-designed picking mechanism in the ground robot's subsystem is studied in two sections. First, a set of analytical, suboptimal semi-analytical and numerical algorithms are studied to solve the inverse kinematics problem of the handling mechanism in firm circumstances. These premeditated approaches are built on the computation of the joint variables by an identified 3D position data of the target leaf only. The outcomes …

Investigation Of A Self-Powered Fontan Concept Using A Multiscale Computational Fluid-Structure Interaction Model, Kyle Beggs

Electronic Theses and Dissertations

Congenital Heart Disease (CHD) occurs in about 1\% (40,000) of newborn babies each year in the United States alone. About 10.9\% (960) of whom suffer from Hypoplastic Left Heart Syndrome (HLHS) - a subset of CHD where children are born with a single-ventricle (SV). A series of three surgeries are carried out to correct HLHS culminating in the Fontan procedure where venous flow returns passively to the lungs. The current configuration for the Fontan results in elevated Central Venous Pressure (CVP), inadequate ventricular preload, and elevated Pulmonary Vascular Resistance (PVR) leading to a barrage of disease. To alleviate these complications, …

Psychophysiology Meets Computer Science: Predicting The Magnitude Of Participant Physiological Response With Machine Learning, Avonie Parchment

Electronic Theses and Dissertations

The present inquiry uses methods from psychophysiology and machine learning to reduce overall error in classification models. The field of psychophysiology, though rooted in decades of experimentation, has never reached the same level of precision as some aspects of medical inquiry. In fact, while some medical regression models, when determining some way to classify a patient's illness based on certain symptoms, can result in highly significant results with large effect sizes, equal levels are virtually unheard of in psychophysiology. The present investigation attempts to unravel some part of this mystery and determines some possible reasons for the difficulty in finding …

Applied Software Tools For Supporting Children With Intellectual Disabilities, Ahmad Abualsamid

Electronic Theses and Dissertations

We explored the level of technology utilization in supporting children with cognitive disabilities at schools, speech clinics, and with assistive communication at home. Anecdotal evidence, literature research, and our own survey of special needs educators in Central Florida reveal that use of technology is minimal in classrooms for students with special needs even when scientific research has shown the effectiveness of video modeling in teaching children with special needs new skills and behaviors. Research also shows that speech and language therapists utilize a manual approach to elicit and analyze language samples from children with special needs. While technology is utilized …

Dordt College 2018-19 Catalog, Dordt College. Registrar's Office

Academic Catalogs

Academic catalog for 2018-19

Incarcerating The Accused: Reforming Bail For The Pretrial Detention Of Juveniles And Youths Aged Eighteen To Twenty-One, Leigha A. Weiss

Journal of Civil Rights and Economic Development

(Excerpt)

This note addresses the injustice of pretrial detention on juveniles, minors, and youths aged eighteen to twenty-one, in New York State. This note will address juveniles, aged eighteen to twenty-one, who are subject to criminal proceedings in adult criminal court and incarceration in adult criminal facilities as well as juveniles or minors below the age of criminal responsibility who are subject to juvenile delinquency proceedings and incarceration in juvenile detention facilities. So many youths are in unnecessary detentions under horrific conditions in adults and juvenile correctional facilities across the country. Serious bail reform is long overdue to provide humane …

Chimney Swift (Chaetura Pelagica) In Wilmington, Delaware, Sally O'Byrne

Delaware Ornithologist

No abstract provided.

Aquatic Coarse Woody Debris, Erin C. Rowekamp, Julia I. Chapman, Ryan W. Mcewan

Data Files

No abstract provided.

Biofilm Ash Free Dry Mass And Chlorophyll A, Kevin W. Custer, Sean D. Mahoney, Mitchell J. Kukla, Corey Kuminecz, Joseph Murphy, Julia I. Chapman, Ryan W. Mcewan

Data Files

No abstract provided.

University Of North Florida Environmental Center Annual Report 2018, Maria Mark, James W. Taylor, John Aloszka

Annual Reports

2018 Annual Report of the Environmental Center at the University of North Florida

Spyglass Spring/Summer 2018, Florida Southwestern State College

Spyglass: The Magazine of Florida SouthWestern State College

Spyglass: The Magazine of Florida SouthWestern State College. Spring/Summer 2018.

Gene Regulation In The Hypothalamic-Pituitary-Gonadal Axis Of The Green Anole Lizard (Anolis Carolinensis)., Joshua N. Peters

All Graduate Theses, Dissertations, and Other Capstone Projects

Studies examining the hypothalamic-pituitary-gonad axis (HPG) in Anolis carolinensis provide insight into the regulation of this axis under extremely different reproductive conditions. Molecular studies indicate that kisspeptin proteins, transcribed from kiss1 and kiss2 genes, are produced in the hypothalamus where they bind G protein-coupled receptor 54 (GPR54), activating the HPG axis. Gonadotropin inhibitory hormone (GnIH) and its receptors, G protein-coupled receptor 147 and 74 (GPR147 and GPR74), down regulate HPG axis function. In this experiment we examined HPG axis gene expression in the green anole lizard (Anolis carolinensis), a seasonally breeding species with higher steroid hormone levels in the breeding …

Patterns Of Trematode Distribution From Hosts Collected At Lake Winnibigoshish, Minnesota, Scott Malotka

All Graduate Theses, Dissertations, and Other Capstone Projects

A comparative and seasonal study was performed on trematode populations and communities within waterfowl definitive hosts in order to determine important factors in the structuring of these communities. Furthermore, larval trematode populations were also sampled in order to compare larval stages found within snail hosts to adult stages found within collected waterfowl in order to determine where infections could have occurred with the trematode species. 52 birds including 18 blue-winged teal (Anas discors), 5 bufflehead (Bucephala albeola), 4 common goldeneye (Bucephala clangula), 1 greater scaup (Aythya marila), 1 green-winged teal (Anas carolinensis), 11 lesser scaup (Aythya affinis), 1 northern pintail …

Predicting Invasive Carp Habitat Suitability In The Minnesota River, Minnesota, Melissa Oubre

All Graduate Theses, Dissertations, and Other Capstone Projects

Since the 1980's invasive carp have been expanding their range northward up the Mississippi River. Consisting of four species, grass carp (Ctenophaygodon idella), silver carp (Hypophthalmichthys molitrix), bighead carp (H. nobilis), and black carp (Mylopharyngodon piceus), these fish have the potential to naturalize and expand into large Mississippi River tributaries like the Minnesota River (MNR). Thus, understanding the likelihood of naturalization in these tributaries is vital in guiding prevention or mitigation efforts. This study evaluates the environmental suitability of the Minnesota River, the largest tributary to the Mississippi in Minnesota, for invasive carp. Environmental suitability for invasive carp is modeled …

Determination Of The Sivmac Vif-Human Apobec3b Interaction, Oumar Sanogo

All Graduate Theses, Dissertations, and Other Capstone Projects

The APOBEC3 family of enzymes are DNA cytosine deaminases, some of which restrict replication of HIV-­‐1. This viral restriction is caused by deamination of cytosines to uracils in the viral cDNA, resulting in lethal mutation. HIV-­‐1 counteracts this deamination by producing the protein Vif, which targets the restricting APOBEC3 enzymes for proteosomal degradation. Previous studies have demonstrated that HIV-­‐1 Vif mediates degradation of APOBEC3D (A3D), APOBEC3F (A3F), APOBEC3G (A3G), and APOBEC3H (A3H). Other lentiviruses may also encode a Vif protein, however not all Vif proteins can degrade the same APOBEC3 proteins. For example, SIVmac (simian immunodeficiency virus that infects rhesus …

Multi-Objective Optimal Battery Placement In Distribution Networks, Kiana Khalilnejad

Masters Theses

"Due to high penetration of renewable energy resources in today's electricity generation, considerable voltage fluctuations are witnessed in power systems. As an attempt to solve this issue, in this study, multi-objective optimal placement and sizing of distribution-level battery storage system is performed using semidefinite programing. Placement of one or multiple battery system is studied under various objectives including the cost, voltage regulation, reactive power dispatch, renewable resource curtailment, and minimum network power losses. Power flow equations are solved in the form of semidefinite constraints and the rank constraint is ignored. Additionally, combination of these objectives to form a multi-objective problem …

Nature Of Regional Nongovernmental Organizations During The Post-Soviet Transformation In Georgia, Shota Shubladze

Walden Dissertations and Doctoral Studies

After the collapse of the Soviet Union, the post-Soviet transformation process influenced the establishment of democratic institutions in the country of Georgia. Scholars and analysts from international organizations have revealed a gap in the development of the central and regional civil society organizations in Georgia. Using Morgan's organizational metaphors framework as a guide, the purpose of this multiple case study was to explore the nature, culture, and structure of regional nongovernmental organizations (NGOs) in Georgia. Research questions focused on the influence of the post-Soviet transformation on the development of Georgia's regional NGO sector and its perceived capacity as a democratic …

The Impact Of Technology Innovations In High School Biology Courses On Science Learning For Hmong Students, Thai Xiong

Walden Dissertations and Doctoral Studies

Hmong high school students struggle in science courses and have difficulty using technology, leaving them behind other ethnic groups in science performance. There is lack of research regarding Hmong students' struggle in technology-focused science courses, especially regarding the experiences of Hmong students with using science technology and teachers' experiences with these students. This single case study was designed to explore how technology innovations in high school biology courses impact science learning for Hmong students based on Gu, Zhu, and Guo's technology acceptance model. Both Hmong student and science teacher interviews as well as reflective journal data were collected to better …

Priests' Perceptions Of The Leadership Styles Of U.S. Catholic Bishops, Aloysius Okey Ndeanaefo

Walden Dissertations and Doctoral Studies

The United States Catholic bishops have used their authority to address the child sexual abuse scandal, but it has been problematic that no one has yet evaluated their exercised leadership styles. In this phenomenological study, I explored U.S Catholic priests' perceptions of the bishops' leadership styles related to how they handled the child sexual abuse scandal. Knowing the bishops' leadership styles was paramount to fill the research gap. The theoretical frameworks underpinning this study were transformational leadership, transactional leadership, charismatic leadership, and servant leadership. Data collected through interviews with 11 Catholic priests revealed their perceptions of how the behavioral characteristics …

A Phenomenological Analysis Of Formerly Incarcerated Women's Perceptions Of Successful Reentry, Angela Martilik

Walden Dissertations and Doctoral Studies

Female offenders are distinctly different from male offenders, and present with their own gender-specific needs and issues both in and out of the correctional setting. Most approaches to treatment and programming for female offenders are currently based on research involving males and approaches designed for males. Inquiry regarding the gender-specific needs of female inmates as they pertain to treatment and reentry programs is necessary so professionals can better understand how to serve this population. Through in-depth semi-structured interviews with 8 women who were formerly incarcerated in the United States, this phenomenological study was used to examine the perceptions of successful …

High School Teachers' Self-Reported Knowledge And Implementation Of Social And Emotional Learning Competencies, Stephanie Y. Clark Rhoe

Walden Dissertations and Doctoral Studies

Public policymakers have failed to address public high school students' social and emotional learning (SEL). Recent public policies such as Common Core State Standards (CCSS) do not measure SEL outcomes as significant. Public education is government funded and therefore public policy driven. Research indicates SEL competencies have a positive influence on students' academic successes, classroom behaviors, and future career outcomes. The conceptual framework for this study was based on SEL components described by the Collaborative for Academic, Social, and Emotional Learning (CASEL) and served as the lens though which the data were analyzed. Research questions for this phenomenological study explored …

Public Elementary School Teachers' Experiences With Implementing Outdoor Classrooms, Lori Schultz Goff

Walden Dissertations and Doctoral Studies

Children experience limited time outdoors and have few opportunities for outdoor learning in schools, putting them at risk for being unprepared to engage in solving environmental and societal problems. Researchers have examined outdoor learning at the preschool and high school levels; elementary school experiences have been explored less frequently. Guided by a conceptual framework informed by social emotional learning (SEL), ecological literacy, and teacher self-efficacy, this study investigated public school elementary teachers' experiences with outdoor classrooms including barriers and supports to creating and using outdoor classrooms. A qualitative design using in-depth interviews with interpretive phenomenological analysis techniques was conducted with …

Mediating Effect Of Academic Self-Efficacy Between Teachers' Attitudes And Achievement Of Low-Income High School Students, Nickole Marie Cottrill

Walden Dissertations and Doctoral Studies

Researchers have found that low-income students have greatly suffered academically, yet there have been no advancements causing the academic achievement gap to close for any length of time. Using Bandura's social cognitive, self-efficacy, and academic self-efficacy theories as the foundation, this study explored the mediating effect of academic self-efficacy in the relationship between perceived teacher attitudes and perceived academic achievement in low-income high school students. Data were collected from 145 low-income high school students via an online survey geared towards their parents to ensure full parental consent. The survey included demographic questions, a perceived academic achievement question, the Classroom Teacher-Student …

Strategies Small Business Salon Owners Use To Survive Longer Than 5 Years, Delita Netrice Johnson

Walden Dissertations and Doctoral Studies

Small business owners are the primary initiators of innovation and economic growth but fail at high rates. Fifty percent of small businesses fail within the first 5 years of operations. Through the lens of systems theory, the purpose of this multiple case study was to explore the strategies some small salon business owners use to remain in business for longer than 5 years. Using purposeful sampling, the 7 owners of small salon business owners in the southeastern United States were selected based upon evidence of their strategies to sustain their businesses for longer than 5 years. Data were collected through …

Thinking Perspective Profiles As A Predictor Of Intelligence Analysts' Job Performance., Curtis Rasmussen

Walden Dissertations and Doctoral Studies

Empirical research has supported the use of general cognitive ability to predict employee performance; however, studies have accounted for only a fraction of the variance. The current study addressed whether intellectual styles, which describe how individuals habitually acquire and use information, account for a significant portion of the variance in job performance not covered by general cognitive ability. The study followed a quantitative, nonexperimental design with a convenience sample of 77 intelligence analysts from 6 U.S. government agencies and 2 online professional groups. MindTime provided the primary theoretical framework. The International Cognitive Ability Resource, MindTime Profile InventoryTM, and Self-Rated Analytic …

An Examination Of The Knowledge And Screening Practices For Child Maltreatment Among Primary Care Providers, Nicole Cirincione

DNP Projects

Background: Child maltreatment can affect any race, economic status, gender, and age. Primary care providers have contact with children and their caretakers daily and develop bonds that encourage open communication. Screening for child maltreatment risk factors can help discover those in danger and decrease abuse rates. Purpose: The purpose of this study was to examine provider’s knowledge of child maltreatment risk factors and assess screening and documentation practices. Methods: This was a descriptive study that included an electronic survey to primary care providers to assess current knowledge and practices for child maltreatment risk factors. Second, a retrospective chart review was …

The Influences On And Impact Of Economic And Community Development Policies In A Micropolitan City, Anna M. Kautzman

Walden Dissertations and Doctoral Studies

As the U.S. economy changed from industry to information, small cities suffered a decline in quality of life and an increase in poverty. The existing research has focused on demographics and descriptive attributes of micropolitan cities, but not on efforts to overcome these challenges. The purpose of this study was to explore and understand how a micropolitan city used economic and community development policies to rebuild its economy and improve quality of life. Using Holland's conceptualization of complex adaptive systems, research questions focused on triggers for policy creation and its use to create social change by improving the local economy …