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Proceedings of the IEEE

Issue 6 • Date Jun 1989

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Displaying Results 1 - 7 of 7
  • The evolution of electrical and electronics engineering and the Proceedings of the IRE: 1913-37

    Publication Year: 1989 , Page(s): 837 - 856
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    A chronicle is presented of how the Proceedings of the IRE documented and influenced the changes in telecommunications technology and electronics that took place from 1913 through 1937, the first quarter-century of the Institute of Radio Engineers. During these years, the vacuum tube evolved from a laboratory device of low power and frequency into a wide variety of mass-produced tubes suitable for a wide range of power levels and frequencies. The long-wave systems that dominated initially gave way to short-wave systems for international communication and radio broadcasting enjoyed spectacular growth. Electromechanical television that was introduced in the 1920s gave way to all-electronic television in the 1930s. Proceedings papers disclosed developments that marked the advent of microwave systems and applications of the differential analyzer that set the stage for the digital computer. The impacts of World War I and of the Great Depression that began in 1929 also were reflected in the proceedings. Military enterprise exerted a strong influence on trends in the radio-electronics industry throughout the period View full abstract»

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  • On the theory of the electrocardiogram

    Publication Year: 1989 , Page(s): 857 - 876
    Cited by:  Papers (19)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1788 KB)  

    The biophysical basis for understanding the electrocardiogram is set forth. Bioelectric sources arise from electrical activity in the heart at the cellular level. The relation of these sources, which can be formally represented as impressed currents, to potentials involves solution of the volume conductor problem. This solution is based on Green's theorem. Sources are related to the transmembrane action potential through a bidomain model of heart muscle. Microscopic and macroscopic aspects of the bidomain model are developed. Various transformations of the source are considered, including multipoles, multiple dipoles, and replacement of the volume distribution with distributions on the heart surface. Time integrals of the waveform are related to excitation time and action potential duration. The theoretical results form the basis of a computer model of the electrocardiogram that relates skin potentials to the spatial and temporal distribution of action potentials in the heart View full abstract»

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  • Emerging issues in power system planning

    Publication Year: 1989 , Page(s): 891 - 898
    Cited by:  Papers (11)
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    Uncertainties in load growth, fuel prices, and regulation are all factors leading to complexity in power-system planning. The criteria and constraints that are important in system planning are reliability, environmental standards, economics, financial ability, and societal impacts. Some of the criteria conflict with the others, requiring some tradeoffs in making planning decisions. To plan a system considering these criteria, detailed analytical studies that typically simulate the operation of the system under the projected future conditions are performed. Attributes such as reliability levels and price of electricity estimated form these studies for different plans are compared to choose the robust plan. Least-cost or integrated resource planning, nonutility generation, and capacity purchases are specifically addressed to illustrate the technical and institutional issues involved in the electric utility planning process View full abstract»

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  • Least-cost planning: issues and methods

    Publication Year: 1989 , Page(s): 899 - 907
    Cited by:  Papers (19)
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    Electric utility least-cost planning is formulated in terms of supply- and demand-side options, irreducible uncertainties, and stakeholders' objectives. Planning methods include constrained optimization, tradeoff analysis, and game theory. Constrained optimization is the traditional and still most popular approach. Tradeoff analysis, which seeks good compromises, seems most appropriate for today's least-cost planning environment. It is suggested that game theory, which is particularly useful in a competitive and noncooperative environment, may play a role in least-cost planning View full abstract»

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  • Nonlinear elastic inversion of prestack marine seismic data

    Publication Year: 1989 , Page(s): 877 - 890
    Cited by:  Papers (2)
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    A horizontally stratified medium consisting of a fluid layer overlaying any number of solid layers is considered. The depth distribution of the density and of the two elastic parameters from prestack offshore surface data is to be determined. The inverse problem is posed in terms of optimization. Its solution is based on nonlinear least squares. Since the solution of the direct problem is an important point in the inversion algorithm, a variational formulation capable of solving the (well-known) numerical difficulty at the liquid-solid interface is used. The acoustoelastic aspect of the problem is stressed. The feasibility of the technique is shown for large-size synthetic examples. It is expected that acoustoelastic inversion will help improve the interpretation of offshore seismic data View full abstract»

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  • Customer cost of electric service interruptions

    Publication Year: 1989 , Page(s): 919 - 930
    Cited by:  Papers (52)
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    An approach often used to estimate power-system reliability worth is to determine consumers' monetary losses resulting from service interruptions, i.e. the cost of unreliability. Previously, studies have been conducted to provide estimates of customer interruption costs, and a wide range of methodologies has evolved. There is no universal agreement on the appropriateness of methodologies to particular situations nor on the interpretation of the results obtained, but some appear to be more acceptable and useful to the industry than others. A survey is presented of the techniques available for estimating customer interruption costs, the rationale of those that are currently popular is discussed, and the application of such cost data in creating a composite customer damage function is explored View full abstract»

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  • Integrating demand-side management into utility planning

    Publication Year: 1989 , Page(s): 908 - 918
    Cited by:  Papers (19)  |  Patents (13)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (812 KB)  

    The authors review the role that customer-oriented demand-side management (DSM) can plan in utility planning, discuss its current state of application, provide a framework for incorporating uncertainty in DSM programs, and present ideas on how DSM programs can be implemented and monitored. They conclude that DSM provides a workable solution to some of the major problems confronting electric utilities today. DSM offers utility management many alternatives to improving customer satisfaction and maintaining good customer relations in the increasingly competitive area of electric supply, besides improving the utility's financial health. Decision analysis can provide a sound basis for selecting DSM alternatives in an environment of uncertainty. Finally, DSM provides an implementable mechanism to incorporate utility and customer requirements into integrated planning procedures View full abstract»

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Aims & Scope

The most highly-cited general interest journal in electrical engineering and computer science, the Proceedings is the best way to stay informed on an exemplary range of topics.

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Editor-in-Chief
H. Joel Trussell
North Carolina State University