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Potentials, IEEE

Issue 2 • Date Apr/May 2001

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Displaying Results 1 - 10 of 10
  • AMAP for typecasting

    Publication Year: 2001 , Page(s): 28 - 30
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (84 KB) |  | HTML iconHTML  

    We introduce a design of an associative memory array processor (AMAP) to be used in character recognition. The design example is based upon the bit-parallel organization. The AMAP consists of identical processing elements that can store information about a specific position into the pattern and also contain some logic gates to carry out logical operations. No effort has been made to perform either processing or feature extraction of any kind View full abstract»

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  • Workstation clusters for parallel computing

    Publication Year: 2001 , Page(s): 31 - 33
    Cited by:  Papers (2)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (192 KB) |  | HTML iconHTML  

    Workstation clusters have become an increasingly popular alternative to traditional parallel supercomputers for many workloads requiring high performance computing. The use of parallel computing for scientific simulations has increased tremendously in the last ten years, and parallel implementations of scientific simulation codes are now in widespread use. There are two dominant parallel hardware/software architectures in use today: distributed memory, and shared memory. Systems implementing shared memory provide cooperating processes with a shared memory address space that can be accessed by all processors. In shared memory systems, parallel processing occurs through the use of shared data structures, or through emulation of message passing semantics in software. Distributed memory systems are composed of a number of interconnected computational nodes, which do not share memory, but can communicate with each other through a high-performance network of some kind. Parallelism is achieved on distributed memory systems with multiple copies of the parallel program running on different nodes, sending messages to each other to coordinate computations. The messages used in a distributed memory parallel program typically contain application data, synchronization information, and other data that controls the execution of the parallel program View full abstract»

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  • Electromagnetics without equations

    Publication Year: 2001 , Page(s): 16 - 20
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (304 KB) |  | HTML iconHTML  

    This brief discussion demonstrates that at least one fundamental property of EM fields, the radiation and propagation of power through space, can be explained without complicated mathematics. Since EM fields would not exist without radiation, this means that understanding EM need not be mathematically intimidating View full abstract»

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  • Event correlation

    Publication Year: 2001 , Page(s): 34 - 35
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (73 KB) |  | HTML iconHTML  

    The advent of modern computer technology has enabled the development of many complex man-made systems. These include discrete manufacturing systems, communication networks, computer systems, traffic control systems, and inventory systems. A common characteristic of these systems is that they have discrete states (e.g., idle, processing, queue empty/full, and normal/faulty). Also, their state transition is triggered by events (e.g., part arrival/dispatch, alarms, commands, and timeout). For this reason, these systems are called discrete event systems or event-driven systems. As today's industry moves towards more complex, distributed and heterogeneous discrete event systems, there is a growing need for integration, consolidation, correlation, and distribution of the events coming from the systems. Event correlation achieves those objectives using methods borrowed mostly from artificial intelligence and formal methods. Historically, event correlation systems were developed for real-time monitoring of many classical mission-critical systems such as power plant and water/gas/oil distribution systems. Recently, it has been spreading into new areas such as messaging, network management and computer intrusion detection View full abstract»

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  • Silica aerogel

    Publication Year: 2001 , Page(s): 12 - 15
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (160 KB)  

    Silica aerogels are unique in chemistry and have intrigued scientists and engineers alike. They have distinct properties that are attractive in a number of technologies. Although it has been in existence since 1930, silica aerogels are still fairly new in terms of discovery and research. Aerogel's air-like qualities have been put to use for home insulation to comet catchers. With the right combination, aerogels can improve computer chips and even act as capacitors. Aerogels even have the potential of improving the environment. For these reasons, government labs such as NASA, among others, have been supporting the continued study of aerogels. The present paper discusses chemical aspects, the manufacturing process, electrical applications, advantages and disadvantages of its use View full abstract»

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  • Nature's algorithms [genetic algorithms]

    Publication Year: 2001 , Page(s): 21 - 24
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (248 KB) |  | HTML iconHTML  

    Combinatorial optimization problems typically require every possible solution to be evaluated to ensure finding the optimal solution. Since such exhaustive searches are often impractical, there is now a vast body of heuristic algorithms for them. Among the algorithms are those based on metaphors borrowed from other areas of science. The idea is that key elements of physical processes can be used abstractly to form the basis of an optimization algorithm. This article presents a broad overview of several metaphor-based algorithms, including the widely-used genetic and simulated annealing algorithms View full abstract»

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  • The optimal basics for GAs

    Publication Year: 2001 , Page(s): 25 - 27
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (136 KB) |  | HTML iconHTML  

    Genetic algorithms were introduced by John Holland in early 1970s as a special technique for function optimization. They are quite different from other more conventional optimization methods that are mainly stochastic in nature. A typical GA will have three phases; i.e., initialization, evaluation and genetic operation. In each phase, various parameters of GA need to be selected based on the nature of the optimization problem. A genetic algorithm is also classified based on the various combinations of parameters and strategies employed. However, the designer is free to develop a hybrid genetic algorithm. The main goal is to deliver the most enhanced performance possible to the optimization problem View full abstract»

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  • Power quality

    Publication Year: 2001 , Page(s): 5 - 11
    Cited by:  Papers (21)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1040 KB) |  | HTML iconHTML  

    One big reason for the poor power quality incidents experienced today is the proliferation of electronic devices. A voracious appetite for higher efficiency and productivity in the manufacturing sector, comfort and automation in homes, and efficient lighting systems in commercial installations are driving the market for power electronic devices. At the forefront of this explosion is the switched power supply. Compared to its predecessor-the linear power supply-it can convert higher power much more efficiently and with a significantly smaller footprint. The switched power supply is found in most of today's computers, fax machines, laser printers, office copiers, etc View full abstract»

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  • Piloting the Panama Canal today

    Publication Year: 2001 , Page(s): 40 - 44
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (816 KB) |  | HTML iconHTML  

    The advent of inexpensive and reliable data processing, communications and navigation technologies has presented an opportunity to enhance significantly the safety and efficiency of Panama Canal operations. A traffic management and control system based on the Global Positioning System (GPS) was developed at the Volpe Center. (The US Department of Transportation's Volpe National Transportation Systems Center is located in Cambridge, MA.) It has been installed and tested with great success. The system utilizes augmented GPS information and a complex two-way data link to direct key traffic management information wherever needed along the 50-mile length of the Canal View full abstract»

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  • Ferroelectric thin film and broadband satellite systems

    Publication Year: 2001 , Page(s): 36 - 39
    Cited by:  Papers (5)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (120 KB)  

    There are several microwave applications where tunable ferroelectric devices could play a key role in improving system performance, or they could provide the key technology that enables a system to be deployed. This article focuses on the Ka-band phased array antennas, but tunable filters, oscillators, and switches could also utilize these materials View full abstract»

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Aims & Scope

IEEE Potentials is the magazine dedicated to undergraduate and graduate students and young professionals.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
David Tian
Carnegie Mellon University
david.tian@ieee.org