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Biomedical Engineering, IEEE Transactions on

Issue 11 • Date Nov. 1986

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Displaying Results 1 - 14 of 14
  • IEEE Transactions on Biomedical Engineering - Table of contents

    Publication Year: 1986 , Page(s): c1
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    Freely Available from IEEE
  • IEEE Engineering in Medicine and Biology Society

    Publication Year: 1986 , Page(s): c2
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    Freely Available from IEEE
  • Effect of Millimeter-Wave Irradiation on Growth of Saccharomyces cerevisiae

    Publication Year: 1986 , Page(s): 993 - 999
    Cited by:  Papers (24)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3927 KB)  

    Cultures of Saccharomyces cerevisiae were exposed for 4 h to millimeter waves in three frequency ranges between 41.650 and 41.798 GHz. The irradiation frequency was stabilized to within ±50 Hz. The temperature difference between irradiated and sham-irradiated samples was maintained to within ±0.01°C. Growth was measured optically during the irradiation, and viability counts were done at the end of the irradiation. At least three experiments were performed at each of 15 frequencies. View full abstract»

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  • Statistical Measures of Parameter Estimates from Models Fit to Respiratory Impedance Data: Emphasis on Joint Vanabilities

    Publication Year: 1986 , Page(s): 1000 - 1009
    Cited by:  Papers (12)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2904 KB)  

    To describe respiratory mechanical impedance data, many investigators have proposed electromechanical models and then fit them to data using formal parameter estimation techniques. This approach has resulted in confusion as to how to interpret the resulting estimated values, and hence as to which model is most appropriate. A key cause of this confusion is that most studies rely on the quality of fit between the model and the data as the only measure of model validity rather than performing adequate statistical analysis of the parameter estimates themselves. This paper describes several statistical measures that should be applied to parameter estimates obtained from forced oscillation data. Specifically, we describe standard errors of the parameter estimates, confidence intervals for each parameter estimate, and the joint confidence region for the parameters. Much emphasis is placed on the joint confidence region which, unlike the interval, allows for simultaneous variations in parameters. The measures are applied to an often used six-element model for respiratory impedance data of dogs from 4 to 64 Hz. This application indicated that even when fitting data over this frequency range, parameter estimates are not well defined and the parameter estimated with least accuracy is airway resistance. View full abstract»

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  • Regulation of a Physiological Parameter or In Vivo Drug Concentration by Integral Pulse Frequency Modulated Bolus Drug Injections

    Publication Year: 1986 , Page(s): 1010 - 1020
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (7271 KB)  

    This paper describes the designs for two novel, nonlinear, discrete, drug injection controllers. The basis for these controllers is integral pulse frequency modulation (IPFM). An IPFM controller injects small boluses of a drug into a pharmacokinetic (PK) plant to achieve regulation of the plant output. Bolus injections are advantageous because they provide a precise knowledge of the times and the cumulative amount of drug injected, and they require a discrete-action pump suitable for digital control, miniaturization, and implantation. View full abstract»

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  • A Dual-Mode Dynamic Model of the Vergence Eye Movement System

    Publication Year: 1986 , Page(s): 1021 - 1028
    Cited by:  Papers (47)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2597 KB)  

    The disparity vergence eye movement system, long thought to be a simple continuous feedback system, has recently been shown to exhibit more complex dual-mode slow and fast responses. A model has been developed which simulates this behavior. The slow component accounts for the smooth following of slowly moving stimuli. The fast component has samnpling and prediction mechanisms which account for the staircase-like step responses to fast ramp stimuli. Model simulation responses to pulse, step, step-pulse, ramp, and sinusoidal stimuli show good fit to these diverse experimental results. This robust and comprehensive model forms the basis for further understanding of the dynamic controlling mechanisms of the vergence system. View full abstract»

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  • Motion Artifact from Spot and Band Electrodes During Impedance Cardiography

    Publication Year: 1986 , Page(s): 1029 - 1036
    Cited by:  Papers (29)
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    We have modified impedance cardiography for monitoring cardiac output during stress tests. Employing an off-line microcomputer, our instrument ensemble averaged impedance signals to minimize the effect of motion artifacts. We proposed a new four-spot electrode array and replaced the usual encircling band electrode array with it. We tested ten normal subjects and compared the signal-to-noise ratio (SNR) from our spot electrode array to that from a typical band electrode array at rest and during four levels of exercise on a treadmill. The average of the sighal-to-noise ratios for ten subjects from our spot electrode array was 13.6-45.5 percent larger than that from the band electrode array at rest and during four levels of exercise. Thus, it is desirable to replace band electrodes with spot electrodes in impedance cardiography for exercising subjects. View full abstract»

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  • Cardiac Output Monitoring by Impedance Cardiography During Treadmill Exercise

    Publication Year: 1986 , Page(s): 1037 - 1042
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1865 KB)  

    We have modified impedance cardiography for monitoring cardiac output during stress tests. We adapted an ensemble-averaging technique for eliminating motion artifacts. We applied an array consisting of four spot ECG electrodes for impedance cardiogram (ICG) monitoring and compared it to conventional encircling band electrodes. We tested ten normal adults, compared the cardiac output obtained by our ICG monitoring system to that simultaneously obtained by the carbon dioxide (CO2) rebreathing method at rest and during three levels of treadmill exercise. The results show that the correlation coefficient between the spot electrode ICG and the CO2 rebreathing method is r = 0.90, and between the band electrode ICG and the CO2 rebreathing method is r = 0.96. If we use the peak-to-valley height of dz/dt instead of the peak height of dZ/dt in computing cardiac output, the correlation coefficient between the spot electrode ICG and the CO2 rebreathing method can be improved to r = 0.95. View full abstract»

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  • On the Reduction of Interference Due to Common Mode Voltage in Two-Electrode Biopotential Amplifiers

    Publication Year: 1986 , Page(s): 1043 - 1046
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (717 KB)  

    The circuit parameters contributing to common mode voltage interferences in two-electrode amplifiers, both isolated and nonisolated, are reviewed. For the isolated case, a more complete model than that reported in the literature is described, and a new methodology to analyze the problem is introduced. Next, the usual values of the parameters concerned are considered; and by applying the results obtained with the model and method described, some conclusions about the design of this kind of amplifier are drawn. View full abstract»

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  • Definition of the Geometric Area of a Microelectrode Tip by Plasma Etching of Parylene

    Publication Year: 1986 , Page(s): 1046 - 1049
    Cited by:  Papers (3)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2175 KB)  

    The geometric area of the tip of an intracortical stimulation electrode can be defined by combining photoresist masking with oxygen plasma etching of Parylene.1 The method was tested with both capacitor and iridium oxide electrodes and caused no significant degradation of the electrical properties of the electrode. View full abstract»

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  • Real-Time FFT to Monitor Muscle Fatigue

    Publication Year: 1986 , Page(s): 1049 - 1051
    Cited by:  Papers (5)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (484 KB)  

    The median frequency of a myoelectric signal is obtained (in real time) from the signal spectrum. To this end, we use a computer-based fast Fourier transformer which outputs, every second, an average computed over 16 consecutive values. View full abstract»

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  • Call for Papers Special Transactions Issue on Biomedical Robotics

    Publication Year: 1986 , Page(s): 1052
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    Freely Available from IEEE
  • IEEE Transactions on Biomedical Engineering Statement of Editorial Policy

    Publication Year: 1986 , Page(s): 1052-a
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    Freely Available from IEEE
  • Institutional listings

    Publication Year: 1986 , Page(s): 1052b
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    Freely Available from IEEE

Aims & Scope

IEEE Transactions on Biomedical Engineering contains basic and applied papers dealing with biomedical engineering. Papers range from engineering development in methods and techniques with biomedical applications to experimental and clinical investigations with engineering contributions.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Bin He
Department of Biomedical Engineering