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Polymer clay nanocomposites have been a popular area of materials research since they were first introduced in the 1990s. The inclusion of clays into many different host polymers has been shown to improve the properties of matrix polymers in a number of ways including increased mechanical strength, thermal stability and improved barrier properties while keeping the comp....

By Bilge Gurun--GIT--2010-11-08
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The goal of this dissertation was to create a new class of DMFC targeted at high energy density and low loss for small electronic devices. In order for the DMFC to efficiently use all its fuel, with a minimum of balance of plant, a low-loss proton exchange membrane was required. Moderate conductivity and ultra low methanol permeability were needed. Fuel loss is the domi....

By Hyea Kim--GIT--2010-11-08
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Today, ethanol, as well as other biofuels, has been increasingly gaining popularity as a major alternative liquid fuel to replace conventional gasoline for road transportation. One of the key challenges for the future use of bioethanol is to increase its availability in the market via an efficient and economic way. However, one major concern in using the existing gas-pi....

By Xiaoyuan Lou--GIT--2010-11-08
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Metabolic diversity involved in biodegradation of 2-nitroimidazole and 5-nitroanthranilic acid Evolution of strategies for biodegradation of synthetic organic pollutants relies on recruitment of genes from catabolic pathways for natural compounds. Investigation of metabolic diversity in nature can provide insight into biochemical strategies that could be recruited for b....

By Yi Qu--GIT--2010-11-08
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This century is surely the century of data (Donoho, 2000). Data analysis has been an emerging activity over the last few decades. High dimensional data is in particular more and more pervasive with the advance of massive data collection system, such as microarrays, satellite imagery, and financial data. However, analysis of high dimensional data is of challenge with the....

By Lingyan Ruan--GIT--2010-11-05
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Polymer nanocomposites (PNCs) have gained significant interest because they have outstanding performance that allows cost reduction, weight reduction, and product improvement. This research study focuses on the manufacture and characterization of PNCs in order to explore their potential in automotive applications. More specifically, polypropylene (PP) nanocomposites rei....

By Chun Chu--GIT--2010-11-03
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Many serious illnesses are linked to everyday exposures to toxic chemicals. In the U.S., most chemical exposure comes from common consumer products such as pesticides, fragranced products, cleaning supplies, and building materialsproducts so widely used that people consider them safe. As the links between everyday toxic exposures and potential health effects become bett....

By Caitlin Janson Waddick--GIT--2010-11-03
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Light emitting transistors (LETs) and transistor lasers (TLs) are newly-emerging optoelectronic devices capable of emitting spontaneous or stimulated light while performing transistor actions. This dissertation describes the design, growth, and performances of long wavelength LETs and TLs based on InAlGaAs/InP material system. First, the doping behaviors of zinc (Zn) an....

By Yong Huang--GIT--2010-11-02
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This dissertation focuses on improving content-based recommendation systems for music. Specifically, progress in the development in music content-based recommendation systems has stalled in recent years due to some faulty assumptions: 1. most acoustic content-based systems for music information retrieval (MIR) assume a bag-of-frames model, where it is assumed that a son....

By Jeremy T Reed-Electrical and Computer Engineering-GIT-doctoral-2010-10-27
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The field of computer vision focuses on the goal of developing techniques to exploit and extract information from underlying data that may represent images or other multidimensional data. In particular, two well-studied problems in computer vision are the fundamental tasks of 2D image segmentation and 3D pose estimation from a 2D scene. In this thesis, we first introduc....

By Romeil Singh Sandhu-Electrical and Computer Engineering-GIT-doctoral-2010-10-26
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As air traffic congestion grows, air traffic flow management (ATFM) is becoming a great concern. ATFM deals with air traffic and the efficient utilization of the airport and airspace. Air traffic efficiency is heavily influenced by unanticipated factors, or uncertainties, which can come from several sources such as mechanical breakdown; however, weather is the main unav....

By Yu-Heng Chang-Industrial & Systems Engineering-GIT-doctoral-2010-10-26
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The objective of this thesis is to determine and analyze the dose rate to personnel throughout the proposed IRIS nuclear power plant. To accomplish this objective, complex models of the IRIS plant have been devised, advanced transport theory methods employed, and computationally intense simulations performed. IRIS is an advanced integral, light water reactor with a 335 ....

By David Patrick Hartmangruber-Mechanical Engineering-GIT-masters-2010-10-25
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