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Dynamic power allocation and routing for satellite and wireless networks with time varying channels
(Massachusetts Institute of Technology, 2004)
Satellite and wireless networks operate over time varying channels that depend on attenuation conditions, power allocation decisions, and inter-channel interference. In order to reliably integrate these systems into a high ...
Analysis of DRIE uniformity for microelectromechanical systems
(Massachusetts Institute of Technology, 2004)
A quantitative model capturing pattern density effects in Deep Reactive Ion Etch (DRIE), which are important in MEMS, is presented. Our previous work has explored the causes of wafer-level variation and demonstrated ...
Clustering via matrix exponentiation
(Massachusetts Institute of Technology, 2004)
Given a set of n points with a matrix of pairwise similarity measures, one would like to partition the points into clusters so that similar points are together and different ones apart. We present an algorithm requiring ...
Maximizing degrees of freedom in wireless networks
(Massachusetts Institute of Technology, 2004)
We consider communication from a single source to a single destination in a wireless network with fading. Both source and destination have multiple antennas. The information reaches the destination through a sequence of ...
Fabrication of metallic nanostructures from sputtered nanocluster precursors
(Massachusetts Institute of Technology, 2004)
This thesis studies the morphological and electrical properties of copper nanocluster devices generated by DC magnetron sputtering and annealed at temperatures up to 1100 C. At each annealing step, the resistivity of the ...
Exploring alternans characteristics of electrocardiogram for prediction of Paroxysmal Atrial Fibrillation
(Massachusetts Institute of Technology, 2004)
The goal of our thesis was to investigate if P-wave and PQ segment alternans can be used to detect and predict Paroxysmal Atrial Fibrillation (PAF) from an Electrocardiogram (ECG). The work involved implementing an algorithm ...
Bioinformatics and database tools for glycans
(Massachusetts Institute of Technology, 2004)
Recent advances in biology have afforded scientists with the knowledge that polysaccharides play an active role in modulating cellular activities. Glycosaminoglycans (GAGs) are one such family of polysaccharides that play ...
NIRA : a new Internet routing architecture
(Massachusetts Institute of Technology, 2004)
(cont.) mechanism, a user only needs to know a small region of the Internet in order to select a route to reach a destination. In addition, a novel route representation and packet forwarding scheme is designed such that a ...
Digital pre-compensation for faulty D/A converters : the "missing pixel" problem
(Massachusetts Institute of Technology, 2004)
In some contexts, DACs fail in such a way that specific samples are dropped. The dropped samples lead to distortion in the analog reconstruction. We refer to this as the "missing pixel" problem. Under certain conditions, ...
Age differentiation of rat smooth muscle cells : altered proliferation profile, cellular changes, and implications for atherosclerotic plaque destabilization
(Massachusetts Institute of Technology, 2004)
Clinical evidence has shown that the elderly are at a higher risk for atherosclerotic plaque destabilization. The effect of aging on smooth muscle cells, a major cell type in the plaque, is central to the process of disease ...