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A 140 GHz gyro-amplifier using a confocal waveguide : theory and experimental results
(Massachusetts Institute of Technology, 2017)
This thesis reports on the theory, design, and experimental investigation of a gyrotron travelling-wave-tube (TWT) amplifier at 140 GHz. The gyro-TWT uses the HE06 mode of a confocal geometry as its operating mode. The ...
Optimal standoff imaging using structured laser illumination and graphical models
(Massachusetts Institute of Technology, 2014)
Structured illumination can be used to form images without using a lens or a detector array. A series of spatially-structured laser pulses is cast on the scene of interest, and a single-detector power measurement is made ...
Keer electro-optic measurements in liquid dielectrics
(Massachusetts Institute of Technology, 2014)
Kerr electro-optic technique has been used to measure the electric field distribution in high voltage stressed dielectric liquids, where the difference between refractive indices for light polarized parallel and perpendicular ...
Real-time continuous gesture recognition for natural multimodal interaction
(Massachusetts Institute of Technology, 2014)
I have developed a real-time continuous gesture recognition system capable of dealing with two important problems that have previously been neglected: (a) smoothly handling two different kinds of gestures: those characterized ...
Dynamic ON-resistance in high voltage GaN field-effect-transistors
(Massachusetts Institute of Technology, 2014)
Recently, the development of energy efficient electrical power management systems has received considerable interest due to its potential to realize significant energy savings for the world. With current Si-based power ...
Joint multilingual learning for coreference resolution
(Massachusetts Institute of Technology, 2014)
Natural language is a pervasive human skill not yet fully achievable by automated computing systems. The main challenge is understanding how to computationally model both the depth and the breadth of natural languages. In ...
Portable low-cost magnetic resonance imaging
(Massachusetts Institute of Technology, 2014)
Purpose: As the premiere modality for brain imaging, MRI could find wider applicability if lightweight, portable systems were available for siting in unconventional locations such as intensive care units (ICUs), physician ...
Information-theoretic metrics for security and privacy
(Massachusetts Institute of Technology, 2015)
In this thesis, we study problems in cryptography, privacy and estimation through the information-theoretic lens. We introduce information-theoretic metrics and associated results that shed light on the fundamental limits ...
Exploiting hierarchical and temporal information in building predictive models from EHR data
(Massachusetts Institute of Technology, 2015)
Clinical predictive modeling has the potential to revolutionize healthcare by allowing caregivers to allocate resources effectively, resulting not only in lower costs but also in better patient outcomes. Electronic health ...
New error correcting codes from lifting
(Massachusetts Institute of Technology, 2015)
Error correcting codes have been widely used for protecting information from noise. The theory of error correcting codes studies the range of parameters achievable by such codes, as well as the efficiency with which one ...