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Development of terahertz quantum-cascade lasers
(Massachusetts Institute of Technology, 2007)
The terahertz or the far-infrared frequency range of the electromagnetic spectrum ( ... ) has historically been technologically underdeveloped despite having many potential applications, primarily due to lack of suitable ...
Energy-efficient analog-to-digital conversion for ultra-wideband radio
(Massachusetts Institute of Technology, 2007)
In energy constrained signal processing and communication systems, a focus on the analog or digital circuits in isolation cannot achieve the minimum power consumption. Furthermore, in advanced technologies with significant ...
Tracking dynamic regions of texture and shape
(Massachusetts Institute of Technology, 2007)
The tracking of visual phenomena is a problem of fundamental importance in computer vision. Tracks are used in many contexts, including object recognition, classification, camera calibration, and scene understanding. ...
Scheduling algorithms for throughput maximization in data networks
(Massachusetts Institute of Technology, 2007)
This thesis considers the performance implications of throughput optimal scheduling in physically and computationally constrained data networks. We study optical networks, packet switches, and wireless networks, each of ...
A few days of a robot's life in the human's world : toward incremental individual recognition
(Massachusetts Institute of Technology, 2007)
This thesis presents an integrated framework and implementation for Mertz, an expressive robotic creature for exploring the task of face recognition through natural interaction in an incremental and unsupervised fashion. ...
Measurement and control of exciton spin in organic light emitting devices
(Massachusetts Institute of Technology, 2007)
Organic semiconductors are a promising new material set for electronic and optoelectronic devices. Their properties can be precisely controlled through chemistry, and they are well-suited for large-area, flexible, and ...
Comparator design and analysis for comparator-based switched-capacitor circuits
(Massachusetts Institute of Technology, 2007)
The design of high gain, wide dynamic range op-amps for switched-capacitor circuits has become increasingly challenging with the migration of designs to scaled CMOS technologies. The reduced power supply voltages and the ...
Strained SiGe-channel p-MOSFETs : impact of heterostructure design and process technology
(Massachusetts Institute of Technology, 2007)
Conventional Si CMOS intrinsic device performance has improved by 17% per year over the last 30 years through scaling of the gate length of the MOSFET along with process innovations such as the super-steep retrograde channel ...
Predicting confusions and intelligibility of noisy speech
(Massachusetts Institute of Technology, 2007)
Current predictors of speech intelligibility are inadequate for making predictions of speech confusions caused by acoustic interference. This thesis is inspired by the need for a capability to understand and predict speech ...
The psychophysiology of risk processing and decision making at a regional stock exchange
(Massachusetts Institute of Technology, 2007)
A longstanding controversy in philosophy is whether decision-making is governed by reason or emotion. I study the role of physiological responses in the decision-making process within the realm of financial markets, where ...