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Date 1-4 April 1990

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Displaying Results 1 - 25 of 240
  • SOUTHEASTCON '90. Proceedings (Cat. No.90CH2883-7)

    Publication Year: 1990
    Request permission for commercial reuse | PDF file iconPDF (161 KB)
    Freely Available from IEEE
  • 'Hands-off' - Voice activated automated anesthesia recordkeeping and monitoring system (ARMS)

    Publication Year: 1990, Page(s):822 - 824 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (179 KB)

    The development of an inexpensive pilot anesthesia recordkeeping and monitoring system (ARMS) for use during surgery is described. This IBM-PC-based system permits automated acquisition and storage of physiologic data obtained continuously from anesthetized patients during surgery. Additionally, graphic displays have been developed to trend changes in relevant physiologic variables. Operation of t... View full abstract»

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  • Erasure communication channel statistics

    Publication Year: 1990, Page(s):1056 - 1061
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (225 KB)

    Three categories of density functions are demonstrated for an erasure communication channel where the output is restricted to being greater than some threshold. The exponential, gamma, and geometric variables are in the first category by a variance that goes to a constant value as the threshold goes to infinity. The Gaussian, Rayleigh, and Poisson random variables are in a second category characte... View full abstract»

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  • A study of the chirping of mode-locked laser pulses using a coupled-mode analysis

    Publication Year: 1990, Page(s):523 - 528 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    A nonlinear analysis of the chirp of the optical frequency during a short optical pulse is reported in which the full nonlinear effects are included. The procedure takes the mode amplitudes and phases resulting from a previously reported nonlinear analysis technique and uses Fourier transform methods to determine the chirp. The results are compared to those of previously reported linearized method... View full abstract»

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  • A computer controlled energy conversion laboratory for electrical engineering students

    Publication Year: 1990, Page(s):518 - 522 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A computer-controlled energy-conversion laboratory for undergraduate and graduate-conversion courses is presented. The laboratory utilizes data acquisition, an electronic controller, and finite elements for analysis. The finite-element method was used to develop computerized analysis method by which students would be able to compare theoretical results with laboratory data. The purpose is to impro... View full abstract»

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  • SPICE tutorial system

    Publication Year: 1990, Page(s):515 - 517 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    The concept of building a tutorial system to help in using SPICE tools is discussed. A system called the SPICE was built using the Franz Lisp environment. The user can learn how to simulate electrical or electronic circuits, how to use the subcircuit, and how to debug and deal with the error messages. A user with a basic understanding of using computers can update the system's engineering knowledg... View full abstract»

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  • Standard cell floorplanning within the FHDL automatic placement tool

    Publication Year: 1990, Page(s):435 - 437 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Techniques which are being developed for the floorplanning of layouts in the Florida Hardware Design Language (FHDL) layout tool are present. These techniques show a different approach to the floorplanning of those layouts which are to contain a mixture of standard cells and macrocells. General cell placement and floorplanning are discussed. Standard cell collection, block generation, and placemen... View full abstract»

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  • A proposed control scheme for a vocal prosthesis

    Publication Year: 1990, Page(s):511 - 514 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    The authors report on research into the recognition of speech utilizing the myoelectric signals exhibited by the muscles that shape the vocal tract. Myoelectric signals from four muscle sites were digitized along with the acoustic waveform. Energy, average magnitude, and standard deviation of the biopotentials served as inputs to a maximum likelihood classifier. Recognition is close to three times... View full abstract»

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  • The maximum step wise fault detection, and artificial intelligence

    Publication Year: 1990, Page(s):1031 - 1035 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    For a system designed for stepwise maximum fault diagnosis, an algorithm is given to write down the requirements of fault diagnosis in terms of a complete set of axioms. The concept of artificial intelligence is studied and applied to the problem of fault diagnosis of the system. If the system has been designed for t0 fault diagnosis without repair and if, after t... View full abstract»

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  • The Florida Hardware Design Language

    Publication Year: 1990, Page(s):430 - 434 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    The Florida Hardware Design Language (FHDL), an expandable language that provides a uniform method for specifying all portions of an integrated circuit's design, is discussed. FHDL was designed to support the development and testing of wafer-scale integrated circuits, especially at the functional level, but can be used to design other integrated circuits at many levels. FHDL is not just a design l... View full abstract»

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  • Classification of electromyographic signals by autoregressive modeling

    Publication Year: 1990, Page(s):508 - 510 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    The classification of a set of intramuscular electromyographic (EMG) signals collected from normal, neuropathic, and myopathic patient groups is discussed. The signal is recorded in real time for 2 or 3 s, during which the patient performs a continuous ramp contraction. The time-varying dynamic nature of the neuromuscular system was observed by autoregressive (AR) modeling of the running windowed ... View full abstract»

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  • Representing imprecise information in NF2 relations

    Publication Year: 1990, Page(s):1026 - 1030 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    A model which can represent imprecise information and store it as an extension of normal-form (NF2) relations with one level of nesting is proposed. It is shown by example that the model is more general than the ordinary NF2 relational model. This generality is accomplished by an operator that can manipulate imprecise data and precise data and can have the same properties as ... View full abstract»

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  • Simulating topographic features with fractals

    Publication Year: 1990, Page(s):427 - 429 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The simulation of naturally occurring topographical features using fractals is described. Features are indicated on an image array by position, shape, and intensity. The shape is indicated by a skeleton outlining the contours of the feature. The fractal image is created using a recursive subdivision method, also known as midpoint replacement, in conjunction with the skeleton of the feature. Images... View full abstract»

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  • A Wigner based t-ω semblance function for underwater acoustic signal processing

    Publication Year: 1990, Page(s):728 - 732 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    A time evolving spectral pseudosemblance, or coherency, function is proposed. The function relies on auto- and cross-Wigner distribution analysis where the expectation of the Wigner distribution is shown to be equal to the instantaneous power spectral density of a nonstationary signal. Signal returns are modeled as the output of a time-variant random filter through which the time-evolutionary natu... View full abstract»

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  • The development of Drosophila Melanogaster exposed to VHF electromagnetic radiation

    Publication Year: 1990, Page(s):504 - 507 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The teratogenic effects produced on Drosophila melanogaster pupae exposed to 150-MHz electromagnetic (EM) radiation at a level of 1.0 mW/cm2 for various durations and at various stages of pupae development are discussed. The experiment comprised two identical sessions, with each session consisting of a total of 12 Drosophila cultures (six cultures per control group and two cultures in e... View full abstract»

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  • An expert system for the design of highway noise barriers in the microcomputer environment

    Publication Year: 1990, Page(s):297 - 301 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    The most effective method for highway noise mitigation is the noise barrier. The development of a prototype expert system, in a microcomputer environment, to design noise barriers is presented. CHINA is an expert system which is a tool on the Vanderbilt University VAX 11/780. It contains rules which encode the facts and heuristic knowledge by noise barrier design experts. The implementation of the... View full abstract»

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  • A communication network for distributed database systems

    Publication Year: 1990, Page(s):1021 - 1025 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    A graph traversal algorithm and its application to a dynamically partitionable bus network for a distributed database system are presented. The approach can be summarized as follows: (1) transform database operations into a graph where vertices represent database operations and edges denote the conflicts of using system resources among database operations, (2) color the constructed graph so that t... View full abstract»

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  • A dynamic vision classification system using Fourier descriptions

    Publication Year: 1990, Page(s):424 - 426 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    The design and implementation of a vision classifier system which can display, label, and identify different known objects in applicable images is presented. Every object can be described during the training phase or classified during the recognition phase according to the normalized Fourier descriptors obtained from sampling its boundary. These descriptors are invariant to the rotation, size, and... View full abstract»

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  • Signal restoration using a modified version of Jansson's iterative deconvolution method

    Publication Year: 1990, Page(s):723 - 727 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    A modification of Jansson's method of iterative convolution to allow convergence for a broader class of distorted signals is discussed. This modification consists of a cross-correlation operation of both the distorted signal and its distortion operator prior to the start of the deconvolution. Its performance is evaluated. Test cases include deconvolving spectral peak data at various signal-to-nois... View full abstract»

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  • Moving-window algorithm for fast fingerprint verification

    Publication Year: 1990, Page(s):343 - 348 vol.1
    Cited by:  Papers (3)  |  Patents (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    Fingerprint verification as a means of identification requires speed and reliability. The authors describe a moving-window algorithm that is developed to fulfil these requirements. This algorithm uses pattern matching of the images of the areas around each minutia. It is fast and uses a stepping-stone scan. It verifies thin-ridged fingerprints, whose acceptance rate gets low with the stepping-ston... View full abstract»

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  • Test cases: emergent generalizations in the Athena and the Rumelhart's neural net models

    Publication Year: 1990, Page(s):500 - 503 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The performances of Rumelhart's nonlinear feedforward (NLFF) model and Athena are compared with respect to their generalization capabilities. The evaluation is based on a number of actual test cases. Evaluations are provided for the specific characteristics of the problems and the models involved, explaining the variations of their performances. The test cases presented illustrate the general type... View full abstract»

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  • Behind the inheritance relations in a semantic network

    Publication Year: 1990, Page(s):289 - 296 vol.1
    Cited by:  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    There are many confused meanings on the use of ISA (is-a), AKO (a-kind-of), and ISPART (is-part-of) relations. This problem can be solved only by defining the precise meaning of the ISA, AKO and ISPART relations, and by recognizing either a class node or an object node for a given node in a semantic network. The author makes clear, precise and consistent definitions for these inheritance relations... View full abstract»

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  • Problem management and determination in SNA sub-networks

    Publication Year: 1990, Page(s):953 - 958 vol.3
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    A network management architecture called the systems network architecture (SNA) is discussed. SNA contains functions that allow monitoring and control in a physical unit at the network layers. The network management category that is discussed is subnetwork problem management. The subnetwork consists of data communication equipment (DCE), data terminating equipment (DTE), and the transmission mediu... View full abstract»

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  • A template query language for non-first normal form databases

    Publication Year: 1990, Page(s):1018 - 1020 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    An application of techniques in extended relational databases and models, expert systems, and fuzzy set theory to the problem of data retrieval from a relational database is discussed. A novel approach that permits the retrieval of database information based on a template retrieval language is described. It differs from previous approaches in that retrieval is permitted over a set of tuples that a... View full abstract»

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  • Effects of the vocal tract shape in the spectral tilt of the glottal pulse waveform

    Publication Year: 1990, Page(s):86 - 89 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Practical models of the glottal pulse can help enhance the overall naturalness of synthetic speech. A method for capturing the first-order effects is developed based on an approximation of the spectral envelope for a family of vowel-dependent glottal pulses. A linear relationship between the vocal tract and the glottal synthesis network parameters is obtained using least-squares minimization on th... View full abstract»

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