Digital Commons Network^™

A Linear Actuator/Spring Steel-Driven Glove For Assisting Individuals With Activities Of Daily Living, Daniel Chizhik

Electronic Theses and Dissertations

Over three million people in the U.S. suffer from forearm and hand disabilities. This can result from aging, neurological disorders (e.g., stroke), chronic disease (e.g., arthritis), and injuries. Injuries to hands comprise one-third of all work-related injuries worldwide. This can lead to difficulties with activities of daily living (ADL), where one needs to grasp, lift, and release objects in the household. There is a rise in demand for assistive orthoses and gloves that can allow many people to regain their grasping/releasing ability and, thereby, their independence. The main contribution of this thesis is developing an assistive glove with the actuating …

Impact Resistance Of Fiber-Reinforced Composites Using Computational Simulations, Maitham Alabbad

Electronic Theses and Dissertations

Composite materials are widely used in aerospace, automotive and wind power industries due to their high strength-to-weight and stiffness-to-weight ratios and their improved mechanical properties compared to metals. The damage resistance of composite materials due to low velocity impact depends on fiber breakage, matrix cracking and delamination between the interfaces. In this research, a numerical investigation of low velocity impact response of a multidirectional symmetric carbon-epoxy composite laminate is carried out and presented. Two different finite element models are developed for composite laminates made of non-crimp fabric to investigate their behavior under different levels of impact energy. In the first …

A Macroeconomic Investigation Of The Labor Market Matching Efficiency, Sarah M. Welch

Electronic Theses and Dissertations

The first section of this research explores how traditional measures of unemployment can mask important changes in the labor market across the business cycle. We therefore use broader definitions of unemployment to estimate time-varying job-matching efficiency rates that are consistent with vacancies and hiring activity data for the U.S. Our efficiency rates are then modeled along with employment data to study their dynamic, non-linear relationship. We find that including part-time workers for economic reasons as well as marginally attached workers helps explain the changes in employment patterns observed after the global financial crisis, emphasizing the importance of accounting for underemployment, …

Uav 6dof Simulation And Kalman Filter For Localizing Radioactive Sources, John G. Goulet

Electronic Theses and Dissertations

Unmanned Aerial Vehicles (UAVs) expand the available mission-space for a wide range of budgets. Using MATLAB, this project has developed a six degree of freedom (6DOF) simulation of UAV flight, an Extended Kalman Filter (EKF), and an algorithm for localizing radioactive sources using low-cost hardware. The EKF uses simulated low-cost instruments in an effort to estimate the UAV state throughout simulated flight.

The 6DOF simulates aerodynamics, physics, and controls throughout the flight and provides outputs for each time step. Additionally, the 6DOF simulation offers the ability to control UAV flight via preset waypoints or in realtime via keyboard input.

Using …

Using Engaged Rhetorical Methods To Understand And Inform Collaborative Decision Making About Dams And Restoration In The Penobscot River Watershed, Tyler Quiring

Electronic Theses and Dissertations

How do we understand what to do with rivers and dams? How might rhetoric, the ancient study of persuasion, inform and shape this understanding as it relates to river restoration practices? Ecological approaches to rhetoric provide ways for engaging in decision making about dams and river restoration. In this dissertation I present three projects that bring media discourse analysis, reciprocal case study, and cross-cultural digital rhetoric to sites of collaborative decision making about dams and rivers in the Penobscot River watershed (Maine, USA). In this place, the prominent Penobscot River Restoration reconfigured several hydroelectric dams to improve fish passage and …

My Haunted Home: A Collection Of Short Stories, Victoria E. Hood

Electronic Theses and Dissertations

“My Haunted Home” is a collection of short stories that explores the way in which hauntings and memory find themselves implanted in the everyday lives of those who live without people in their families. These stories work through grief in the form of haunting and explore how hauntings can be embodied through people and places. These stories work to bend genre tropes of horror and surrealist fiction in hopes to find a merging of haunting and memory. The narrators of these stories are ever changing, although there is overlap in voice throughout some of these stories. Part two of “My …

An Algorithm To Estimate Suspended Particulate Matter Concentrations And Associated Uncertainties From Remote Sensing Reflectance In Coastal Environments, Juliana Tavora

Electronic Theses and Dissertations

Suspended Particulate Matter (SPM) is a major constituent in coastal waters, involved in processes such as light attenuation, pollutant propagation, and waterways blockage. The spatial distribution of SPM is an indicator of deposition and erosion patterns in estuaries and coastal zones and a necessary input to estimate the material fluxes from the land through rivers to the sea. In-situ methods to estimate SPM provide limited spatial data in comparison to the coverage that can be obtained remotely. Ocean color remote sensing complements field measurements by providing estimates of the spatial distributions of surface SPM concentration in natural waters, with high …

Human-Giraffe Interactions: Characterizing Poaching And Use Of Parts As A Threat To Giraffe In Northern Kenya, Kirstie Ruppert

Electronic Theses and Dissertations

Giraffe (Giraffe spp.) are iconic wildlife species to Africa, yet relatively little conservation funding and research have been directed at protection of giraffe in the wild. A growing number of national governments and conservation organizations are implementing management strategies to address the threats that giraffe face. To inform these plans, there is a need for social science that examines the human pressures associated with decline of giraffe populations, including poaching and the use of giraffe parts. As the large majority of reticulated giraffe (Giraffa reticulata) range occurs outside formally protected areas, conservation plans must be made with …