WorldCat Identities

Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science

Works: 2,919 works in 2,931 publications in 1 language and 2,981 library holdings
Genres: Conference papers and proceedings 
Roles: Funder
Classifications: TK2551, 621.3143
Publication Timeline
Most widely held works by Massachusetts Institute of Technology
The 1994 Applied Superconductivity Conference : the Boston Marriott Copley Place, Boston, Massachusetts, October 16-21, 1994 by 1994, Boston, Mass.) Applied Superconductivity Conference (16( Book )

1 edition published in 1995 in English and held by 10 WorldCat member libraries worldwide

A wireless sensor network for smart roadbeds and intelligent transportation systems by Ara N Knaian( Book )

1 edition published in 2000 in English and held by 5 WorldCat member libraries worldwide

We have developed a wireless sensor package to instrument roadways for Intelligent Transportation Systems. The sensor package counts passing vehicles, measures the average roadway speed, and detects ice and water on the road. Clusters of sensors can transmit this information in near real-time to wired base stations for use controlling and predicting traffic, and in clearing road hazards. The sensor package draws a maximum time-averaged current of 17 tA from an internal lithium battery, allowing it to operate in the roadbed for at least 10 years without maintenance. The nodes cost well under $30 to manufacture, and can be installed without running wires under the road, facilitating wide deployment. Unlike many other types of traffic sensors, these sensors count vehicles in bumper-to-bumper traffic just as well as in widely separated traffic. The devices detect vehicles by detecting the perturbations in the Earth's magnetic field caused by the vehicles. They measure this perturbation using an anisotropic magneto-resistive magnetic field sensor. The radio transmitters in the sensor are frequency-agile, and the sensors use a randomized sparse TDMA protocol, which allows several transmit-only devices to share a channel. The sensor package includes a custom-designed, compact, broadband, inexpensive printed circuit microstrip antenna for the 915 MHz U.S. ISM band. We built a prototype sensor package, and installed it in a pothole in a city street. We used the sensor to monitor the traffic flow rate during free-flowing traffic and a traffic jam
Variable-reluctance motor drives for electric vehicle propulsion : final report by Jeffrey Lang( Book )

1 edition published in 1985 in English and held by 4 WorldCat member libraries worldwide

A submarine electric propulsion system with large hub propeller by Michael Scott Hammer( Book )

1 edition published in 1983 in English and held by 3 WorldCat member libraries worldwide

Traditional submarine propulsion systems consist of a prime mover such as a steam turbine, a gear reduction unit, a shaft, thrust and journal bearings coupled to the propeller. This system severely volume limits the submarine as it requires precise alignment of equipment. It also requires a mechanically complex shaft sealing system. A novel scheme is proposed which utilizes a large hub propeller mounted forward of the control surfaces and powered by a seawater-cooled inverted induction motor mounted around the exterior of the hull. This system also promises to reduce propeller noise and increase low speed maneuverability. Computer analysis of the electric motor design is achieved
Submicron- and nanometer-structures technology : lecture notes for course 6.781 by H. I Smith( Book )

1 edition published in 1994 in English and held by 3 WorldCat member libraries worldwide

Digital signal processing and control and estimation theory : points of tangency, areas of intersection, and parallel directions by Alan S Willsky( Book )

2 editions published in 1977 in English and held by 3 WorldCat member libraries worldwide

One-dimensional processing for adaptive image restoration by Philip Chan( Book )

1 edition published in 1984 in English and held by 3 WorldCat member libraries worldwide

A one-dimensional (1-D) approach to the problem of adaptive image restoration is presented. In this approach, we use a cascade of four 1-D adaptive filters oriented in the four major correlation directions of the image, with each filter treating the image as a 1-D signal. The objective of this 1-D approach is to improve the performance of the more general two-dimensional (2-D) approach. This differs considerably from previous 1-D approaches, the objectives of which have typically been to approximate a more general 2-D approach for computational reasons and not to improve its performance. The main advantage of this new 1-D approach is its capability to preserve edges in the image while removing noise in all regions of the image, including the edge regions. To illustrate this point, the approach is applied to existing 2-D image restoration algorithms. Experimental results with images degraded by additive white noise at various SNRs (signal to noise ratios) are presented. Further examples illustrate the application of 1-D restoration techniques based on this approach to images degraded by blurring and additive white noise and images degraded by multiplicative noise. Another example shows its usefulness in the reduction of quantization noise in pulse code modulation image coding
Knowledge organization and content generation in knowledgemediaries by Abhinav Taneja( Book )

1 edition published in 2000 in English and held by 2 WorldCat member libraries worldwide

The revolution after the ongoing Network Centric Era is predicted to be the Content Centric Era or the Knowledge Era. Knowledge will play a key role in the success of organizations and people. Knowledge Management Systems (KMS) and Communities of Practice (CoP) have made it possible to share, transfer and store knowledge amongst people who are co-located or within one organization. The web has made it possible to break geographical and organizational barriers for sharing knowledge. Knowledge workers of the Knowledge Era will tend to form Networked Improvement Communities (NIC) which will focus on niche topics or problems, which are similar for all members of the NIC. Knowledgemediaries are web based services which will help form NICs and support inter-organizational knowledge systems. One such tool is the Lean Enterprise Model (LEM) which has been developed by the Lean Aerospace Initiative (LAI). The LAI was formed by leaders from the U.S. Air Force, Massachusetts Institute of Technology (MIT), labor unions, and defense aerospace companies to improve efficiency by implementing "lean" across the aerospace industry. The LEM is a systematic framework for organizing and disseminating MIT research and external data source results embedded in a hierarchy of Lean Principles, Practices and Metrics. The research objectives of this thesis are to develop a set of recommendations for the LEM to graduate into a Lean Knowledgemediary. The recommendations were based upon key success factors identified for Knowledgemediaries through case studies and studying LEM shortcomings and new challenges faced by the LEM. The frameworks for the case studies are broadly defined as knowledge organization and content generation methodology. LEM shortcomings have been identified through a LEM survey, feedback from the LAI Team and analysis of the LEM based on the case study framework. The new challenge faced by the LEM is the integration of two new tools being developed by LAI, i.e., Lean Enterprise Self-Assessment Tool (LESAT) and Transition to Lean (TTL) Roadmaps. The primary recommendations are to make content generation semi-centralized, improve the feedback process on LEM datasheets and to develop a new graphical interface similar to one of the analyzed case studies, which will integrate the new tools and overcome some shortcomings of the LEM
A channel subspace post-filtering approach to adaptive equalization by Rajesh Rao Nadakuditi( Book )

1 edition published in 2002 in English and held by 2 WorldCat member libraries worldwide

Direct-form adaptive equalization for underwater acoustic communication by Atulya Yellepeddi( Book )

1 edition published in 2012 in English and held by 2 WorldCat member libraries worldwide

Adaptive equalization is an important aspect of communication systems in various environments. It is particularly important in underwater acoustic communication systems, as the channel has a long delay spread and is subject to the effects of time- varying multipath fading and Doppler spreading. The design of the adaptation algorithm has a profound influence on the performance of the system. In this thesis, we explore this aspect of the system. The emphasis of the work presented is on applying concepts from inference and decision theory and information theory to provide an approach to deriving and analyzing adaptation algorithms. Limited work has been done so far on rigorously devising adaptation algorithms to suit a particular situation, and the aim of this thesis is to concretize such efforts and possibly to provide a mathematical basis for expanding it to other applications. We derive an algorithm for the adaptation of the coefficients of an equalizer when the receiver has limited or no information about the transmitted symbols, which we term the Soft-Decision Directed Recursive Least Squares algorithm. We will demonstrate connections between the Expectation-Maximization (EM) algorithm and the Recursive Least Squares algorithm, and show how to derive a computationally efficient, purely recursive algorithm from the optimal EM algorithm. Then, we use our understanding of Markov processes to analyze the performance of the RLS algorithm in hard-decision directed mode, as well as of the Soft-Decision Directed RLS algorithm. We demonstrate scenarios in which the adaptation procedures fail catastrophically, and discuss why this happens. The lessons from the analysis guide us on the choice of models for the adaptation procedure. We then demonstrate how to use the algorithm derived in a practical system for underwater communication using turbo equalization. As the algorithm naturally incorporates soft information into the adaptation process, it becomes easy to fit it into a turbo equalization framework. We thus provide an instance of how to use the information of a turbo equalizer in an adaptation procedure, which has not been very well explored in the past. Experimental data is used to prove the value of the algorithm in a practical context
Online community : knowledge management by Yevgeniya Zemlyakova( Book )

1 edition published in 2000 in English and held by 2 WorldCat member libraries worldwide

Introduction. Motivation: The Information Age has replaced the Industrial Age. Today, companies measure their wealth by a new type of asset -- knowledge. It is more valuable to have the best information and the best knowledge in the industry rather than physical or even natural resources. More and more companies use knowledge for strategic advantage. Therefore, knowledge assets must be nurtured, preserved and used to the largest extent possible by both individuals and organizations. Knowledge that is not accumulated, maintained and presented in a way that can be easily accessed and understood cannot be used effectively. When the challenge of efficiently managing knowledge is resolved, an organization will experience short term benefits in the form of increasing the quality of its products and services and long-term benefits acquiring the ability to use knowledge tools in forecasting, decision making and attracting more clients. The problem of Knowledge Management is an area of active ongoing research. Technologies that are used to address the problem include but are not limited to databases, data warehousing, data mining and intranets. This project focuses on using the available technologies to address the issue of effectively creating, managing, sharing and using the intellectual assets of organizations
System identification techniques and modeling for nonintrusive load diagnostics by Steven Robert Shaw( Book )

1 edition published in 2000 in English and held by 2 WorldCat member libraries worldwide

This thesis addresses the requirements of a system that can detect on/off transients and identify physical parameters of loads connected to a power distribution network. The thesis emphasizes three areas; a transient classifier that recognizes load transients using a pattern matching scheme, parameter estimation techniques suited for use with this classifier, and case studies of modeling and identification motivated by diagnostics and performance monitoring. Together, these areas support applications that can extract detailed load information from centralized, easily accessible parts of a distribution network. A new approach and implementation of pattern-based nonintrusive transient classification is presented. The classifier is nonintrusive in the sense that it uses aggregated measurements at a central location and does not require instrumentation of individual loads. The classifier implementation includes a framework that integrates preprocessors for AC and DC environments, programs that present results, and load-specific parameter identification modules that are executed as their associated transients are classified. An obstacle for these parameter identification programs is that a good initial guess is needed for the iterative optimization routines typically used to find parameter estimates. Two approaches are given to overcome this problem for certain systems. The first extends conventional optimization methods to identify model parameters given a poor initial guess. The second approach treats the identification as a modeling problem and suggests ways to construct "inverse" models that map observations to parameter estimates without iteration. The techniques presented in the thesis are demonstrated with simulation data and in real world scenarios including a dormitory, an automobile, and an experimental building
Distributed autonomy and formation control of a drifting swarm of autonomous underwater vehicles by Nicholas Rahardiyan Rypkema( Book )

1 edition published in 2015 in English and held by 2 WorldCat member libraries worldwide

Recent advances in autonomous underwater vehicle (AUV) technology have led to their wide- spread acceptance and adoption for use in scientific, commercial, and defence applications in the underwater domain. At the same time, research progress in swarm robotics has seen swarm intelligence algorithms in use with greater eect on real-world robots in the field. A group of AUVs utilizing swarm intelligence concepts has the potential to address issues more effectively than a single AUV, and such a group can potentially open up new areas of application. Examples include the monitoring and tracking of highly dynamic oceanographic phenomena such as phytoplankton blooms and the use of an AUV swarm as a virtual acoustic receiver for sea-bottom seismic surveying or the monitoring of naturally occurring acoustic radiation from cracking ice. However, the limitations of the undersea environment places unique constraints on the use of existing swarm robotics approaches with AUVs. In particular, algorithms must be distributed and robust in the face of localization error and degraded communications. This work presents an investigation into one particular swarm strategy for a group of AUVs, termed formation control, with consideration to the constraints of the underwater domain. Four formation control algorithms, each developed and tested within the MOOS-IvP framework, are presented. In addition, a 'formation quality' metric is introduced. This metric is used in conjunction with a measure of formation energy expenditure to compare the efficacy of each behaviour during construction of a desired formation, and formation maintenance while it drifts in ocean currents. This metric is also used to compare robustness of each algorithm in the presence of vehicle failure and changing communication rate
Artwork analysis tools for VLSI circuits by Cullen Montgomery Baker( Book )

1 edition published in 1980 in English and held by 2 WorldCat member libraries worldwide

Current methods of designing Very Large Scale Integrated (VLSI) chips do not insure that the chips will perform correctly when manufactured. Because the turnaround time on chip fabrication varies from a few weeks to a few months, a scheme other than try it and see if it works is needed. Checking of chips by hand simulation and visual inspection of checkplots will not catch all of the errors. In addition, the number of transistors per chip is likely to increase from ten thousand to over a million in the next few years. This increase in complexity precludes any manual verification methods; some better method is needed. A series of programs that use the actual mask descriptions for input are described. These programs perform various levels of checks on the masks, yielding files suitable for simulation. Some of the checks are the usual 'design rule' checks of looking for minimum line widths and adequate spacing between wires. However, there are many more constraints in VLSI circuits than are expressed by usual design rules. The programs check these constraints using the mask descriptions as input. All of the errors mentioned so far can be classified as syntactic errors; in addition, certain errors are detected. The detection of semantic errors requires various levels of simulation. The input to the simulators is derived from the artwork
New architecture for RF power amplifier linearization by Hyun Ho Boo( )

1 edition published in 2009 in English and held by 2 WorldCat member libraries worldwide

Power amplifier linearization has become an important part of the transmitter system as 3G and developing 4G communication standards require higher linearity than ever before. The thesis proposes two power amplifier linearization solutions : two-point architecture and adaptive digital predistortion using a [delta sigma] modulator for automatic inversion of power amplifier nonlinearity. Two-point architecture can be seen as a solution that extends the linearization bandwidth of the traditional feedback architecture while also offering decent digital predistortion linearization at much higher frequencies as well. It overcomes the bandwidth problem by combining Cartesian feedback and digital predistortion. As the Cartesian feedback loses its loop gain in high frequencies, the predistorted signal gradually takes over the linearization role. Effectively, this increases the operation bandwidth of the Cartesian feedback and allows wide-band transmission. For digital predistortion, the complexity involved in the implementation of adaptive algorithm and convergence issues in the look-up table training has limited its application in handset devices. Predistortion using a [delta sigma] modulator presented in this work eliminates these problems as it is based on open-loop look-up table training and does not require adaptive algorithm
OverCite : a cooperative digital research library by Jeremy Stribling( )

1 edition published in 2005 in English and held by 2 WorldCat member libraries worldwide

CiteSeer is a well-known online resource for the computer science research community, allowing users to search and browse a large archive of research papers. Unfortunately, its current centralized incarnation is costly to run. Although members of the community would presumably be willing to donate hardware and bandwidth at their own sites to assist CiteSeer, the current architecture does not facilitate such distribution of resources. OverCite is a design for a new architecture for a distributed and cooperative research library based on a distributed hash table (DHT). The new architecture harnesses donated resources at many sites to provide document search and retrieval service to researchers worldwide. A preliminary evaluation of an initial OverCite prototype shows that it can service more queries per second than a centralized system, and that it increases total storage capacity by a factor of n/4 in a system of n nodes. OverCite can exploit these additional resources by supporting new features such as document alerts, and by scaling to larger data sets
Incremental, generational mostly-copying garbage collection in uncooperative environments by G. May Yip( )

1 edition published in 1991 in English and held by 2 WorldCat member libraries worldwide

The thesis of this project is that incremental collection can be done feasibly and efficiently in an architecture and compiler independent manner. The design and implementation of an incremental, generational mostly-copying garbage collector for C++ is presented. The collector achieves, simultaneously, real-time performance (from incremental collection), low total garbage collection delay (from generational collection), and the ability to function without hardware and compiler support (from mostly-copying collection). The incremental collector runs on commercially-available uniprocessors, such as the DECstation 3100, without any special hardware support. It uses UNIX's user controllable page protection facility (mprotect) to synchronize between the scanner (of the collector) and the mutator (of the application program). Its implementation does not require any modification to the C++ compiler. The maximum garbage collection pause is well within the 100-millisecond limit imposed by real-time applications executing on interactive workstations. Compared to its non-incremental version, the total execution time of the incremental collector is not adversely affected."
MOSSIM : a logic-level simulator for MOS LSI : user's manual by Randal E Bryant( Book )

2 editions published in 1980 in English and held by 2 WorldCat member libraries worldwide

Magnetic circuits and transformers; a first course for power and communication engineers by Massachusetts Institute of Technology( )

2 editions published between 1943 and 1977 in English and held by 0 WorldCat member libraries worldwide

"When originally published in the early 1940s, this series was hailed in the New York Times because it emphasizes "method of thought, and not mere acquisition of facts." This volume extends the circuit theory begun in the first volume into the field of magnetic circuits, and covers both heavy-current power and light-current control, measurement, and communication applications of magnetic materials and transformers."
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Associated Subjects
Banks and banking--Automation Bell Telephone Laboratories Carnegie-Mellon University.--Computer Science Department Columbia University.--Department of Computer Science Computer networks Computer science--Study and teaching Computer science--Study and teaching (Higher) Computer simulation Control theory Detectors Eckert-Mauchly Computer Corporation (Philadelphia, Pa.) Educational fund raising Electrical engineering--Study and teaching Electrical engineering--Study and teaching (Higher) Electric driving Electric motors Electric transformers Electronic industries--Automation Estimation theory Federal aid to higher education Garbage collection (Computer science) Image processing Integrated circuits--Large scale integration Integrated circuits--Large scale integration--Design and construction Intelligent transportation systems Magnetic circuits Magnetism Massachusetts--Cambridge Massachusetts Institute of Technology.--Department of Electrical Engineering Massachusetts Institute of Technology.--Department of Electrical Engineering and Computer Science Mathematical models Micromechanics Microstructure National Cash Register Company NCR Corporation Office equipment and supplies industry Optical character recognition devices Optical data processing Reluctance motors Signal processing--Digital techniques Students Superconductivity Superconductors Underwater acoustics Underwater acoustics--Mathematical models United States United States.--Advanced Research Projects Agency United States.--Office of Scientific Research and Development.--National Defense Research Committee Watson Scientific Computing Laboratory Wireless communication systems
Alternative Names

controlled identityMassachusetts Institute of Technology

controlled identityMassachusetts Institute of Technology. Department of Electrical Engineering



Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science

English (37)