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Now showing items 11-20 of 23
Purely optical tomography : atlas-based reconstruction of brain activation
(Massachusetts Institute of Technology, 2008)
Diffuse Optical Tomography (DOT) is a relatively new method used to image blood volume and oxygen saturation in vivo. Because of its relatively poor spatial resolution (typically no better than 1-2 cm), DOT is increasingly ...
Predicting gene function from images of cells
(Massachusetts Institute of Technology, 2007)
This dissertation shows that biologically meaningful predictions can be made by analyzing images of cells. In particular, groups of related genes and their biological functions can be predicted using images from large ...
Quantization and erasures in frame representations
(Massachusetts Institute of Technology, 2006)
Frame representations, which correspond to overcomplete generalizations to basis expansions, are often used in signal processing to provide robustness to errors. In this thesis robustness is provided through the use of ...
A dual/high-voltage automotive electrical power system with superior transient performance
(Massachusetts Institute of Technology, 2000)
Today's automotive electrical power system is based on an engine-driven alternator regulated at 14 V which charges a 12 V battery and delivers power to the loads. Installed electrical power is growing rapidly with model ...
Intelligence by design : principles of modularity and coordination for engineering complex adaptive agents
(Massachusetts Institute of Technology, 2001)
All intelligence relies on search - for example, the search for an intelligent agent's next action. Search is only likely to succeed in resource-bounded agents if they have already been biased towards finding the right ...
Microstructured tungsten thermophotovoltaic selective emitters c by Natalija (Zorana) Jovanović.
(Massachusetts Institute of Technology, 2008)
This research investigates the fabrication, modeling, characterization, and application of tungsten two-dimensional (2D) photonic crystal (PhC) structures as selective emitters and means of achieving higher efficiencies ...
Stochastic matched field processing for localization and nulling of acoustic sources
(Massachusetts Institute of Technology, 2000)
Radio frequency dc-dc power conversion
(Massachusetts Institute of Technology, 2007)
THIS THESIS addresses the development of system architectures and circuit topologies for dc-dc power conversion at very high frequencies. The systems architectures that are developed are structured to overcome limitations ...
Development of X-ray lithography and nanofabrication techniques for III-V optical devices
(Massachusetts Institute of Technology, 2002)
This dissertation covers the development of fabrication techniques for Bragg-grating-based integrated optical devices in III-V materials. Work on this rich family of devices has largely been limited to numerical analysis ...
Sociable machines : expressive social exchange between humans and robots
(Massachusetts Institute of Technology, 2000)
Sociable humanoid robots are natural and intuitive for people to communicate with and to teach. We present recent advances in building an autonomous humanoid robot, Kismet, that can engage humans in expressive social ...