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Acoustic signal estimation using multiple blind observations
(Massachusetts Institute of Technology, 2006)
This thesis proposes two algorithms for recovering an acoustic signal from multiple blind measurements made by sensors (microphones) over an acoustic channel. Unlike other algorithms that use a posteriori probabilistic ...
Chopper stabilization in analog multipliers
(Massachusetts Institute of Technology, 2006)
The multiplier is a fundamental analog building block. Analog multipliers are used in many systems such as filters, neural networks, automatic gain control circuits, and phase alignment systems. As with any circuit, analog ...
Using optimization and lean principles to design work cells and make capital purchase decisions for hole drilling operations in turbine airfoil manufacturing
(Massachusetts Institute of Technology, 2006)
Classical manufacturing work cells have machines to perform each operation in the process, the number of each type of machine being chosen so that all machines would be equally busy. Although design of work cells for ...
Large core polymer optical backplanes for fluorescence detection
(Massachusetts Institute of Technology, 2006)
Fluorescence based sensors are used for determining environmental parameters such as dissolved oxygen or pH in biological systems without disturbing a biological system's equilibrium. Recently, there has been a drive to ...
Fast magnetic resonance spectroscopic imaging using RF coil arrays
(Massachusetts Institute of Technology, 2006)
Conventional Magnetic Resonance Spectroscopic Imaging (MRSI) suffers from both low signal-to-noise (SNR), as well as long acquisition times. The development of high-fidelity gradient coils has opened opportunities for fast ...
Characterization of nanofilter arrays for small molecule separation
(Massachusetts Institute of Technology, 2006)
Experimental studies were performed to evaluate methods of improving separation resolution and speed in microfabricated nanofilter arrays. Experiment parameters investigated include electric field strength, nanofilter ...
Optical frequency domain imaging of human retina and choroid
(Massachusetts Institute of Technology, 2006)
Optical coherence tomography (OCT) has emerged as a practical noninvasive technology for imaging the microstructure of the human eye in vivo. Using optical interferometry to spatially-resolve backreflections from within ...
A quantitative design and analysis of magnetic nanoparticle heating systems
(Massachusetts Institute of Technology, 2006)
Magnetic particles under the influence of an alternating magnetic field act as localized heating sources due to various loss mechanisms. This effect has been extensively investigated in hypothermia studies over the past ...
View-dependent precomputed light transport using non-linear Gaussian function approximations
(Massachusetts Institute of Technology, 2006)
We propose a real-time method for rendering rigid objects with complex view-dependent effects under distant all-frequency lighting. Existing precomputed light transport approaches can render rich global illumination effects, ...
Bayesian approaches to bilinear inverse problems involving spatial evidence : color constancy and blind image deconvolution
(Massachusetts Institute of Technology, 2006)
This thesis examines two distinct but related problems in low-level computer vision: color constancy and blind-image deconvolution. The goal of the former is to separate the effect of global illumination from other properties ...