Theses and Dissertations

Because the high frequency Carrier Electron Tubes were exhibiting several characteristics that were detrimental to tube manufacture such as low test yields, below nominal test parameters and difficulty of activating and aging, it was proposed to evaluate the use of a modified triple carbonate cathode coating with a reduced percentage of calcium carbonate in place of the double carbonate cathode coating that contains no calcium carbonate as the emission material.

The reverse recovery time of a diode will be defined in terms of the time required for a specified reverse current transient in the diode circuit to decay to particular value. This transient is important to the designers of fast switching circuits, such as those used in high speed computers, because it represents an upper limit to the switching speed of the diode.

The worldwide problem of antibiotic resistance has become one of the most serious health threats of this century and will undoubtedly become top clinical priority. In the U.S. alone, antibiotic-resistant bacteria cause at least 2 million infections and 23,000 deaths a year resulting in a $55-70 billion per year economic impact. The rise in the number of resistant bacteria is mainly attributed to the improper and overuse of antibiotics, and the ability of these bacteria to evolve elaborate genetic systems to counteract pharmaceuticals.

The present work was undertaken in order to provide a general insight into the fine structure of reversed austenite in an 18 Cr-8 Ni stainless steel. A commerical grade 301 steel was selected so as to permit adjustment of the Ms temperature by sensitization. Both optical and transmission electron microscopy were used to establish the various structural details.

</p>Since the coup d'état in Thailand on May 22, 2014, Thais have lived under a junta that has restricted their personal liberties, speech and assembly. Irrespective, some Thais have resisted these limitations to make their voices heard. This research examines the actions of 356 activists who have been arrested or detained for challenging the ruling junta. By quantifying their actions, and the corresponding government reaction, this research attempts to answer if the Thai junta reacts more harshly to dissidents when events are expected or unexpected.

With the advancement of single UAV flight control there is a clear understanding of the importance for future group UAV distributed control. This will in turn lead to scenarios of "smart" communication between UAV teams. This hierarchal chain reaction type control of UAV's will provide more enhanced real time flight pattern optimizations without the slow interactions of a UAV to a computer (aka a human).

</p>Currently, the topic of illegal immigration is popular, but often the conversation centers around negative opinions of undocumented immigrants and the economic consequences of their presence in the United States. Yet, what is rarely discussed is how US citizens are affected by having parents who are undocumented. About 9 million people in the United States are members of mixed-status families, where some family members are US citizens while some are not. This study explores the effects of parents' immigration status on their children's physical and mental wellbeing.

Anodic Aluminum Oxide (AAO) membranes can be fabricated with a highly tunable pore structure making them a suitable candidate for cellular hybrid devices with single-molecule selectivity. The objective of this study was to characterize the cellular response of AAO membranes with varying pore sizes to serve as a proof-of-concept for an artificial material/cell synapse system. AAO membranes with pore diameters ranging from 34-117 nm were achieved via anodization at a temperature of -1̊C in a 2.7% oxalic acid electrolyte.

The purpose of this thesis is to investigate the effect of starting powder characteristics on the sintering behavior of the magnesium-manganese ferrite sheet.

In 2012 implementation of Deferred Action for Childhood Arrivals (DACA) allowed for more than 1.5 million undocumented youth to become eligible for work authorization and to qualify for institutional and in some cases, state financial aid (Passel 2012). With these changes, access to higher education became a realistic possibility for undocumented youth all around the United States. Nevertheless, a generation of undocumented students who managed to navigate the college application process and successfully enrolled in institutions of higher education remained.

We study the existence, uniqueness, and stability of traveling waves in neural field models under various assumptions on the firing rates and kernels. In the case of Heaviside ring rates, we study unique fronts arising from oscillatory synaptic coupling types. We then use functional analysis to show that Heaviside firing rates can be continuously deformed into smooth, sigmoidal functions and the existence of fronts persists.

This thesis investigated Operations Research developed techniques for the facilities-location problem for application to this electronic engineering problem. One technique stood out as the most promising and it was applied to this problem. The technique chosen was CRAFT developed in 1963.

Utilizing a sample of 214 clinical, counseling, and school psychology doctoral students recruited from APA-accredited programs, the present mixed-methods study examined whether and to what extent demographic variables and interprofessional experiencesâ&#x80;&#x94;both educational and practice orientedâ&#x80;&#x94;were related to their self-reported attitudes toward interprofessional health care teams (IPTs) as well as their readiness for interprofessional learning.

In this thesis an empirical relationship is developed that can be used to predict the shear plane angle for AISI C1020 HRS once the cutting conditions have been selected and without the necessity of conducting a trial cut.