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PITTETD 檢索結果共 4141 筆,本頁資料從第 241 筆到第 252 筆

Breast cancer, one of the most common types of cancer among women, is now the second leading cause of cancer deaths after lung cancer. Since a majority of cancer deaths are due to metastasis of breast tumor cells to distant organs, understanding tumor cell invasion and metastasis at a molecular level will help us in developing therapeutics that will improve the quality ....

By Vaishnavi Rajendran Panchapakesa-Bioengineering-University of Pittsburgh-masters-2006-09-27
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The channel capacity can be greatly increased by using multiple transmit and receive antennas, which is usually called multi-input multi-output (MIMO) systems. Iterative processing has achieved near-capacity on a single-antenna Gaussian or Rayleigh fading channel. How to use the iterative technique to exploit the capacity potential in single-user and/or multiuser MIMO s....

By Jianming Wu-Electrical Engineering-University of Pittsburgh-doctoral-2006-09-27
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For certain settings in which system performance cannot be evaluated by analytical methods, simulation models are widely utilized. This is especially for complex systems. To try to optimize these models, simulation optimization techniques have been developed. These attempt to identify the system designs and parameters that result in (near) optimal system performance. Al....

By Jyh-Pang Lai-Industrial Engineering-University of Pittsburgh-doctoral-2006-09-27
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HIV and AIDS are major health care problems throughout the world, with 40 million people living with HIV by the end of 2005. In that year alone, 5 million people acquired HIV, and 3 million people died of AIDS. For many patients, advances in therapies over the past ten years have changed HIV from a fatal disease to a chronic, yet manageable condition. The purpose of thi....

By Steven Michael Shechter-Industrial Engineering-University of Pittsburgh-doctoral-2006-09-27
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This dissertation presents the fabrication and characterization of the AlN thin film bulk acoustic wave resonator (FBAR). The bulk acoustic wave (BAW) resonators and filters have been considered the most promising devices used in the frequency control and wireless communication field when the performance frequency is up to GHz range. AlN is a piezoelectric material with....

By Qingming Chen-Mechanical Engineering-University of Pittsburgh-doctoral-2006-09-27
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Despite the abundance of experimental results on the free motion of solid, liquid, and gaseous particles under various conditions, there is no successful systematization of a drag curve across all three phases. Empirical models offered in the past can be quite useful within the limits of a particular class. However, they lack the capability to explain differences in hyd....

By Igor V. Haljasmaa-Mechanical Engineering-University of Pittsburgh-doctoral-2006-09-27
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Functional Magnetic Resonance Imaging (fMRI) has the potential to unlock many of the mysteries of the brain. Although this imaging modality is popular for brain-mapping activities, clinical applications of this technique are relatively rare. For clinical applications, classification models are more useful than the current practice of reporting loci of neural activation ....

By Pinaki S Mitra-Biomedical Informatics-University of Pittsburgh-doctoral-2006-09-27
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Chronic pain is a major clinical problem. Target-derived growth factors have been implicated in the initiation and maintenance of persistent pain states. Artemin, a member of the glial cell line-derived neurotrophic factor (GDNF) family, binds to its GPI-anchored receptor, GFRá3, and initates intracellular signaling via the tyrosine kinase, Ret. Expression of the GFRá....

By Christopher Michael Elitt-Neurobiology-University of Pittsburgh-doctoral-2006-09-27
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Therapy for patients suffering from acute respiratory distress syndrome (ARDS) is substantially inadequate, resulting in a 40% mortality rate. A biohybrid lung prototype consisting of a rotating endothelialized microporous hollow fiber (MHF) bundle was studied as an alternative solution for improved patient outcome. It is hypothesized that endothelialized MHFs could pre....

By Alexa Ann Polk-Bioengineering-University of Pittsburgh-doctoral-2006-09-27
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A methodology has been developed for automatically determining inter-image correspondences between cliques of features extracted from a reference and a query image. Cliques consist of up to three features and correspondences between them are determined via a hierarchy of similarity metrics based on the inherent properties of the features and geometric relationships betw....

By Robert Joseph Tamburo-Bioengineering-University of Pittsburgh-doctoral-2006-09-27
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There are two main objectives in my research work. The first objective is to investigate the adsorption behavior of various gases on single walled carbon nanotubes. This is accomplished by using the classical molecular simulation methods. Our simulation work has provided molecular level interpretation of some interesting phenomena observed experimentally by our collabor....

By liang Chen-Chemical Engineering-University of Pittsburgh-doctoral-2006-09-27
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The new generation left ventricular assist devices (LVADs) for treating end-stage heart failure are based upon turbodynamic (rotary) pumps. These devices have demonstrated several advantages over the previous pulsatile generation of LVADs, however they have also proven more difficult to control. Limited availability of observable hemodynamic variables and dynamically ch....

By Shao Hui Chen-Electrical Engineering-University of Pittsburgh-doctoral-2006-09-27
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