Theses and Dissertations from UMD
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New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM
More information is available at Theses and Dissertations at University of Maryland Libraries.
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Item IGNITION QUALITY TESTER CHARACTERIZATION WITH PURE COMPONENT AND CONVENTIONAL NAVY FUELS(2016) Mendelson, Jacob Lee; Gupta, Ashwani K; Mechanical Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)The U.S. Navy is attempting to reduce dependence on conventional diesel fuels as a part of the environmental initiative commonly referred to as “The Great Green Fleet”. The purpose of this research was to characterize the measurements of ignition delay gathered by the Advanced Engine Technology Ignition Quality Tester (IQT) with conventional Navy diesel fuels, pure component biodiesel fuels, primary cetane standards, and toluene-hexadecane blends. The use of computational analysis with pressure traces gathered from the IQT allowed for the comparison of IQT ignition delay results with various methods of calculating start of combustion for various fuels. Physical and chemical ignition delays of each fuel were also calculated using different separation techniques and the chemical ignition delay results were compared with prior academic literature and with chemical ignition delays calculated with Lawrence Livermore kinetic theory.Item DEVELOPING PATHWAYS TO SERVING TOGETHER: DUAL MILITARY COUPLES' LIFE COURSE AND DECISION-MAKING(2010) Smith, David Glenn; Segal, Mady W; Sociology; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)The increase in the number and types of military families since the advent of the All-Volunteer Force in 1973 has increased the impact of the work-family interface for the military. For dual career couples, where both the husband and wife are in the military, both are subject to deployment for extended periods of time, high geographic mobility, probability of a foreign residence, the risk of injury or death, and they must manage two specialized and structured career paths (Segal 1986). The purpose of this study is to analyze the work careers and family life course of dual military couples and their decision-making processes, using a life course perspective. Using a grounded theory methodology, I interviewed and analyzed the transcripts of 23 dual military officer couples in the U.S. Navy. Results show that work and family decisions are influenced by the organizational constraints as well as institutional and cultural norms. The rhythm of life in the Navy is shaped by cyclic changing of job assignments and locations, rotation of sea and shore duty assignments, warfare specialty career paths designed for promotion, and the cultural fast track. These couples' experiences in trying to live together with collocated job assignments shape their long-term decision-making for maintaining a career in the Navy. Their experiences show that the organization's demands and far-reaching control are infused into every aspect of their lives. Couples' discourse is focused on their human agency in an effort to maintain control of their life course while meeting the organizational demands of rigid and structured career paths, increased number of sea duty tours and deployments, and perceived low priority of collocation in the assignment process. Dual career couples in this organization use a long-term perspective of the life course to cope with their current situation with the knowledge that their life satisfaction will improve in the near future as they progress in their career. These couples adapt by employing work-family prioritization strategies for achieving their personal and professional goals. Learning how to successfully combine and separate roles through these prioritization strategies reduces stress and increases life satisfaction.Item A Navy in the New Republic: Strategic Visions of the U.S. Navy, 1783-1812(2006-12-05) Slaughter, Joseph Payne; Ridgway, Whitman; History; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)This study examines the years 1783-1812 in order to identify how the Founders' strategic visions of an American navy were an extension of the debate over the newly forming identity of the young republic. Naval historiography has both ignored the implications of a republican navy and oversimplified the formation of the navy into a bifurcated debate between Federalists and Republicans or "Navalists" and "Antinavalists." The Founders' views were much more complex and formed four competing strategic visions-commerce navy, coastal navy, regional navy, and capital navy. The thematic approach of this study connects strategic visions to the narrative of the reestablishment of the United States Navy within the context of international and domestic events. This approach leaves one with a greater sense that the early national period policymakers were in fact fledgling naval visionaries, nearly one hundred years before the advent of America's most celebrated naval strategist, Alfred Thayer Mahan.