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Lower bound techniques for data structures
(Massachusetts Institute of Technology, 2008)
We describe new techniques for proving lower bounds on data-structure problems, with the following broad consequences: * the first [omega](lg n) lower bound for any dynamic problem, improving on a bound that had been ...
Convex relaxation methods for graphical models : Lagrangian and maximum entropy approaches
(Massachusetts Institute of Technology, 2008)
Graphical models provide compact representations of complex probability distributions of many random variables through a collection of potential functions defined on small subsets of these variables. This representation ...
Human Interactive Mission Manager : an autonomous mission manager for human cooperative systems
(Massachusetts Institute of Technology, 2008)
Facilitating low level human supervisory control of mission management is highly challenging because of concerns regarding system stability and performance. Previous implementations of mission managers based on C. S. Draper ...
A low-power, high-bandwidth LDO voltage regulator with no external capacitor
(Massachusetts Institute of Technology, 2008)
A low-dropout (LDO) voltage regulator for low-power applications is designed without an external capacitor for compensation. The regulator has two stages, the first a folded cascode amplifier and the second a large pass ...
Mode conversation losses in overmolded millimeter wave transmission lines
(Massachusetts Institute of Technology, 2008)
Millimeter wave transmission lines are integral components for many important applications like nuclear fusion and NMR spectroscopy. In low loss corrugated transmission lines propagating the HE,1 mode with a high waveguide ...
Practical Mobile Proactive Secret Sharing
(Massachusetts Institute of Technology, 2008)
Secret sharing schemes are needed to store and protect secrets in large scale distributed systems. These schemes protect a secret by dividing the it into shares and distributing the shares to multiple shareholders. This ...
The design and implementation of Alan Touring, the Campus Tourbot
(Massachusetts Institute of Technology, 2008)
Alan Touring, the Campus Tourbot, is a robotic tour-guide/tourist robot for parts of the MIT campus. Work on the robot began in January 2006, and for the past 31 months, I have devoted thousands of hours to designing, ...
Virtual pan-tilt-zoom for a wide-area-video surveillance system
(Massachusetts Institute of Technology, 2008)
Advancements in the CMOS Image Sensor have enabled very high-performance, high resolution imaging systems to be built at relatively low cost. The availability of high-pixel count video imaging systems that can cover a wide ...
A Shared Memory System for Fresh Breeze
(Massachusetts Institute of Technology, 2008)
The Shared Memory System (SMS) for Fresh Breeze, a multiprocessor chip guided by modular programming principles, provides a global space from which all the fresh breeze processors access chunks of memory. The SMS supports ...
Towards an integrated model of feedforward-feedback processing in the visual cortex
(Massachusetts Institute of Technology, 2008)
The goal of this work is to explore a potential improvement on a visual recognition system. The system is a biologically-plausible computational model of the feedforward part of the ventral stream in the visual cortex and ...