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Date 24-26 April 1998

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Displaying Results 1 - 25 of 109
  • Proceedings IEEE Southeastcon '98 'Engineering for a New Era'

    Publication Year: 1998
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    Freely Available from IEEE
  • Tutorial abstracts

    Publication Year: 1998, Page(s):413 - 414
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (159 KB)

    First Page of the Article
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  • Index of authors

    Publication Year: 1998, Page(s):415 - 416
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    Freely Available from IEEE
  • Software safety analysis using rough sets

    Publication Year: 1998, Page(s):15 - 19
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    This paper presents a new method to evaluate software safety using rough set theory. The data about the software product and process are collected via a questionnaire. The result is the direct assessment of the software safety in terms of a single coefficient, whose goodness is then analyzed using rough sets. An automatic tool for the Windows platform has been developed to help in the interactive ... View full abstract»

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  • High temperature simulation of 6H- and 4H-silicon carbide MOSFETs

    Publication Year: 1998, Page(s):271 - 274
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    Vertical power DMOSFET has been simulated using the device simulator ISE-TCAD. The most recent parameters for 6H and 4H SiC crystals are used for this simulation. Vertical DMOSFET with different channel lengths operating at two different temperatures has been examined View full abstract»

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  • A pipelined query processor for distributed multi-databases

    Publication Year: 1998, Page(s):132 - 133
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    This paper describes a pipelined processing technique for queries involving data from distributed, autonomous relational databases. We highlight the basic idea, present a preliminary result, and sketched the planned work towards the development of a more complete multi-database query processor based on the proposed idea View full abstract»

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  • Base-collector heterojunction barrier effects at high current densities of Si/SiGe/Si heterojunction bipolar transistors

    Publication Year: 1998, Page(s):162 - 165
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    The excess electron barrier height at high current densities is examined. The barrier effects on the collector current, transconductance as well as base-collector junction capacitance are calculated. The analytical results are compared with the experimental data and device simulation results. Temperature-dependent characteristics are also evaluated View full abstract»

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  • Soft magnetic materials with fixed transition point

    Publication Year: 1998, Page(s):186 - 189
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    Powdered materials with rigorously fixed Curie point on the basis of nickel with copper and iron additions have been investigated. A new manufacturing technology of temperature sensitive elements of the type of “glass” made of these materials has been developed and tested View full abstract»

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  • Spectral estimation of segmented signals with extrapolation

    Publication Year: 1998, Page(s):28 - 31
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    A method is proposed to find the power spectrum of signals with missing observations. The missing observations were first found by the linear prediction method and then an AR model was assumed and the Burg algorithm was used to estimate the spectrum for each segment of the signal. The coefficients found by Burg's method were updated every time the next value of the missing signal was predicted. Af... View full abstract»

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  • Cstrings: a new string abstract data type for Ada83

    Publication Year: 1998, Page(s):11 - 14
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    All programming languages permit the storage of data in a computer's memory and provide mechanisms for that data to be accessed and manipulated. Data types are implemented in a different manner by each individual programming language. Given some degree of abstraction, however, comparisons can be made between the implementations of a data type in different languages. This paper examines the charact... View full abstract»

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  • A novel fault-model for regular and irregular parallel-prefix adders

    Publication Year: 1998, Page(s):397 - 400
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    In this paper a new fault-detection model, pair faults (pf), is presented to show that the entire `O' carry-tree of Brent-Kung adder is testable contrary to Becker's proof. This model is also used to detect multiple faults for both regular and irregular carry-tree layouts. There are n+1 test patterns which can be applied (n is the operand width) through pipelining the primary inputs of the carry-t... View full abstract»

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  • Determining optimal testing times for Markov chain usage models [software testing]

    Publication Year: 1998, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    Statistical software testing presents two difficulties for the tester: (1) establishing accurate user profiles (i.e. usage probabilities), and (2) incurring lengthy test times. An algorithm, named the frequency count method (FCM), is developed which addresses both difficulties simultaneously. FCM finds usage probabilities within predetermined ranges and concurrently minimizes the amount of testing... View full abstract»

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  • Switching characteristics of a power MOSFET with varying temperature

    Publication Year: 1998, Page(s):268 - 270
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    Over the last several years power MOSFET's have stimulated some very interesting research, particularly applied to cryogenic conditions. This research was developed to study the effects of the power MOSFET's ability to turn on and turn off at varying frequencies and compare the results at room temperature and at liquid nitrogen temperature. The present work will demonstrate that by exposing the de... View full abstract»

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  • Theoretical data and experimental measurements comparison of the visibility of latex particles using LDA technique in the backscatter direction

    Publication Year: 1998, Page(s):128 - 131
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    Based on the laser Doppler anemometry technique and Mie scattering theory, the visibility using a circularly polarized backscattered laser beam was derived and computed. A computer model was developed to establish a relationship between the visibility and the particle size. Experimental data are obtained for comparison with the theoretical results for latex particles of known sizes (0.46 μm, 0.... View full abstract»

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  • Overview of QuikSCAT mission-a quick deployment of a high resolution, wide swath scanning scatterometer for ocean wind measurement

    Publication Year: 1998, Page(s):314 - 317
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    Scatterometer instruments are active microwave sensors that transmit a series of microwave pulses and measure the returned echo power to allow determination of the normalized radar backscattering cross section (sigma-0) of the ocean surface and, subsequently, the ocean wind speed and direction. The NASA scatterometer (NSCAT) was launched on board of the ADEOS in August 1996 and returned 10 months ... View full abstract»

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  • Comparison of basic converter topologies for power factor correction

    Publication Year: 1998, Page(s):348 - 353
    Cited by:  Papers (62)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Basic types of DC-DC converters, when operating in discontinuous conduction mode, have self power factor correction (PFC) property, that is, if these converters are connected to the rectified AC line, they have the capability to give higher power factor by the nature of their topologies. Input current feedback is unnecessary when these converters are employed to improve power factor. In this paper... View full abstract»

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  • Multipath interference detector design for digital data transmission

    Publication Year: 1998, Page(s):376 - 379
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    In this paper, the effects of multipath transmission interference on a digital communication system is investigated. The channel model for multipath transmission consists of a direct transmission path from the transmitter to the receiver and subchannels corresponding to signals being reflected from the ground plane are included. The output of these subchannels are then recombined in a proper fashi... View full abstract»

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  • Survivable itinerant object

    Publication Year: 1998, Page(s):158 - 161
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    An itinerant agent is an agent (object) which can roam the Internet in a secure way and which does useful work for the user. The framework allows the agent and the agent's location to mutually authenticate each other. The developed agent infrastructure provides a way to a survivable intelligent agent that can relieve the agent's owner from worrying about illegal access to distributed databases. Th... View full abstract»

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  • Microstrip line matched normal mode helical antenna for cellular communication

    Publication Year: 1998, Page(s):182 - 185
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    A normal mode helical antenna was designed to operate at 900 MHz. The input impedance of the helix was matched through a microstrip line of a quarter wavelength long. The antenna was simulated with an infinite ground plane. An axial wire between the helix and the microstrip line was introduced in order to reduce the coupling and an end wire to vary the input impedance to a value desired for a narr... View full abstract»

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  • Using tabu search to find optimal switched LAN configurations

    Publication Year: 1998, Page(s):298 - 301
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    The performance of a local area network (LAN) can be improved in many cases by the installation of LAN switches. Determining how to partition a LAN and estimating the performance improvements from a given partitioning are difficult problems. An objective function is developed to quantify a partitioning of a LAN based on a tree-structured topology as supported by IEEE 802.1d compliant LAN switches.... View full abstract»

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  • An enhanced detection of the evoked potential signal using a hybrid QMF algorithm

    Publication Year: 1998, Page(s):24 - 27
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    The authors introduce an efficient technique to detect the evoked potential, EP, transients. A hybrid algorithm using Daubechies (1990, 1994) as the father and Coiflet as the mother wavelet is employed on both a single and four-averaged EP sweeps. A 60% reduction in the number of sweeps with a high quality performance has been achieved when compared to traditional techniques View full abstract»

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  • A data reduction method to train, test, and validate neural networks

    Publication Year: 1998, Page(s):277 - 280
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    Prediction is an important application of neural networks. When a large data source is used to train a neural network model to make prediction, considerable effort and time are required to obtain reliable outcomes. This paper describes a technique that reduces the size of a large data set but still preserves the pertinent characteristics of the problem domain in the data. Neural network models bui... View full abstract»

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  • The theory of audio frequency magnetic or electric fields. I. Physics theory

    Publication Year: 1998, Page(s):194 - 197
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    A need exists for a rigorous definition of the kinds of fringing fields found near power lines and appliances such as computer monitors and television receivers. Basic definitions of the electrical quantities are presented. Understanding the electromagnetic theory of audio frequency fields is approached by the definition of a scalar electric potential function Φ and a vector magnetic potential... View full abstract»

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  • Finite element analysis and active vibration control of a cantilever beam

    Publication Year: 1998, Page(s):37 - 38
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (80 KB)

    Summary form only given. Finite element modeling of a cantilever beam and active vibration control are implemented within the MATLAB environment. Using classical root locus design techniques, a lead-lag compensator is designed to stabilize the beam and to eliminate the effect of a step disturbance. This utilization of the finite element method and control system theory in a common software environ... View full abstract»

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  • A++: simple, intuitive and modular computer language for measurement data analysis

    Publication Year: 1998, Page(s):9 - 10
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    Efficient analysis of data is crucial in decision-making processes. In this paper, we present a new, powerful but easy-to-learn computer language for measurement data analysis. The language, which is called A++, allows multiple hierarchical levels of analysis, has an intuitive format for its analysis formulas, and is well-suited for field usage View full abstract»

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