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IEEE Transactions on Biomedical Engineering

Issue 1 • Date Jan. 1970

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Displaying Results 1 - 25 of 27
  • Table of contents

    Publication Year: 1970, Page(s): c1
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  • IEEE Engineering in Medicine and Biology Group

    Publication Year: 1970, Page(s): c2
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  • A Nonlinear Time-Varying Mathematical Analog of the Gluco-Corticoid Control

    Publication Year: 1970, Page(s):1 - 10
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4327 KB)

    The basic characteristics contributing to the nonlinear time-varying gluco-corticoid control mechanism in 300-gram male rats fasted 18 hours have been formulated. Intact animal time responses of the plasma levels of corticosterone to intraperitoneally injected doses of 50, 200, and 500 ¿g/kg simulated on an analog computer were compared with the experimental results. Nonlinear time-dependent char... View full abstract»

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  • Horizontal Eye Movements from Abducens Nerve Stimulation in the Cat

    Publication Year: 1970, Page(s):11 - 14
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2678 KB)

    Pulse trains with sinusoidally modulated pulse frequencies (50 to 150 pps) were used to stimulate the abducens nerve of the anesthetized cat. Eye movements, the measured output of the system, were observed to follow the sinusoidal modulating waveform over the modulation frequency range of 0.5 to 25 Hz. The gain and phase characteristics of such eye movements indicated the presence of a first-order... View full abstract»

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  • An Objective Measurement of Cyclofusional Response

    Publication Year: 1970, Page(s):15 - 20
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    An objective method was developed to measure the time course of torsional eye movements about the line of sight. The resolution of the system was better than ¿°. View full abstract»

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  • The Length and Diameter of the Node of Ranvier

    Publication Year: 1970, Page(s):21 - 24
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1731 KB)

    The physiological significance of the node of Ranvier is now well known. The histological delineation of its length, however, still remains uncertain. Should it be identified as the gap between the myelin sheaths, or the whole part of the narrowed axon? The present analysis, which makes use of the transmission-line theory, shows that both the length and the diameter of the node are definitely rela... View full abstract»

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  • On the Stability of Biped Locomotion

    Publication Year: 1970, Page(s):25 - 36
    Cited by:  Papers (148)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3775 KB)

    The stability of legged machines in locomotion is considered. The general machine has a rigid body to which legs are attached. Locomotion is performed on level smooth surfaces. View full abstract»

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  • A Practical Approach to Automated Diagnosis

    Publication Year: 1970, Page(s):37 - 43
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1931 KB)

    A method is proposed in which the diagnostic evaluation of medical data is accomplished on the basis of a series of decision tables. The decision table is laid out consisting of rules, each specifying conditions which must be satisfied for a given diagnostic category. For example, a rule may read: ``If the QRS duration in any two limb leads is greater than or equal to 0.12 second, and if the PR in... View full abstract»

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  • Tachyarrhythmias Despite Ventricular Programmed Pacing

    Publication Year: 1970, Page(s):44 - 48
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2063 KB)

    Ventricular-programmed pacemakers are designed to avoid the possibility of dangerous or lethal arrhythmias provoked by stimulation during the vulnerable phase of the ventricle. Even so, rapid heart action (tachyarrhythmia) may still occur. Illustrative examples are presented in which tachyarrhythmia is presumed to have occurred or in which the vulnerable phase has been stimulated, because of: 1)in... View full abstract»

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  • An Inverse Electrocardiographic Solution with an ON-OFF Model

    Publication Year: 1970, Page(s):49 - 57
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2434 KB)

    The electrical activity of a dog's heart is modeled as originating in ten regions, called zones, each of which is either completely active or completely inactive at any one time. Using this model, the electrical activation sequence of the dog's heart during QRS is computed from potentials measured on the dog's torso, and from his geometry. The sequence computed is compared with measurements direct... View full abstract»

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  • Effect of Surface Electrode Number on Estimates of Cardiac Dipole Moment

    Publication Year: 1970, Page(s):58 - 65
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2971 KB)

    This study reports on the errors in the calculation of a heart dipole introduced by deleting individual electrode contributions to a surface potential map. The potential at 150 points on each of 6 normal children was available at several instants of the QRS cycle. Although it was impossible to test all possible sets of deleted points, or all possible methods of compensatory weighting of the residu... View full abstract»

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  • Measurement of Periodicity in 32P Concentration in Breast Tumors with an Automated Integral Counting Technique

    Publication Year: 1970, Page(s):66 - 69
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2015 KB)

    Radioactive phosphorus 32P has been used extensively in the assessment of cellular activity. By using mica end-window geiger tubes in contact with surface breast tumors, circadian fluctuations of the 32P content of breast tumors have been demonstrated in vivo. This paper describes the equipment used and summarizes the results obtained. View full abstract»

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  • Correction [transactions devoted to "The Venous System: Characteristics and Function, a Biomedical Engineering Approach"]

    Publication Year: 1970, Page(s): 69
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    Summary form only given, as follows. The October, 1969, issue of this TRANSACTIONS was devoted to a paper symposium on The Venous System: Characteristics and Function, a Biomedical Engineering Approach, organized by Guest Editors A. Noordergraaf and E. Kresch. Through an unfortunate oversight, the title of this symposium was omitted from the Table of Contents and the Introduction. View full abstract»

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  • Development of an Ion-Sensitive Solid-State Device for Neurophysiological Measurements

    Publication Year: 1970, Page(s):70 - 71
    Cited by:  Papers (202)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (445 KB)

    The development of an ion-sensitive solid-state device is described. The device combines the principles of an MOS transistor and a glass electrode and can be used for measurements of ion activities in electrochemical and biological environments. Some preliminary results are given. View full abstract»

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  • A Preliminary Investigation of Piezoelectric Effects in Chicken Feathers

    Publication Year: 1970, Page(s): 71
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    Piezoelectric effects have been measured experimentally in chicken feathers. Quill sections subjected to alternating electric stress respond with an axial twisting motion that has a well-defined resonant mode. Conversely, subjecting the quill to mechanical stress produced an electrical signal. View full abstract»

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  • Distortion-Compensating Filter for Middle Ear of the Cat

    Publication Year: 1970, Page(s):72 - 73
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (562 KB)

    A design for an electronic filter with a transfer function inverse to that of the middle ear of the cat is given. The filter predistorts electrical input signals to an earphone driver amplifier in order to counteract the inherent low-pass operation of the middle ear. Thus, the effective bandwidth at the output of the middle ear is increased from approximately 1700 Hz to approximately 10 000 Hz, th... View full abstract»

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  • Common-Mode Rejection Ratio-Two Definitions

    Publication Year: 1970, Page(s):73 - 74
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (569 KB)

    Two different definitions of the common-mode rejection ratio for differential amplifiers are not clearly distinguished. These ratios may differ by orders of magnitude. When differential amplifiers are used to minimize common mode interference in bioelectric measurements, these two ratios should be carefully defined and their magnitudes determined experimentally. View full abstract»

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  • Sinusoidal Burst Generator for Auditory Evoked Response Research

    Publication Year: 1970, Page(s):74 - 76
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1705 KB)

    A simple stimulator has been devised in which sinusoidal signals in the audio range are linearly modulated to generate tone bursts of controlled duration and shape for auditory research. The stimulator comprises a transistor differential pair modulator whose differential collector voltage is the product of the voltage applied at a base (sine wave input) and the emitter current (varied by the modul... View full abstract»

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  • An Adjustable Random-Pulse Generator

    Publication Year: 1970, Page(s):76 - 77
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (454 KB)

    This short communication describes a device which delivers pulses whose time of arrival is randomized within a time interval distribution whose lower boundary and duration are set by the user. In addition, the device permits the user to select the ``fineness'' of timing within the selected interval. View full abstract»

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  • The Removal of Coherent Noise from Short Digitized Records

    Publication Year: 1970, Page(s): 78
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (401 KB)

    A technique is described for the removal of coherent noise from digitized signals by using cross correlation to identify the noise parameters. The approach is particularly useful for removing power system noise from short digitized physiological signals (ECG, EEG). View full abstract»

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  • A Pulsatile Roller Pump for Cardiac Bypass

    Publication Year: 1970, Page(s):78 - 80
    Cited by:  Papers (1)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1840 KB)

    This short communication describes a cardiac bypass pump which produces a pulsatile flow. By driving a roller pump with a dc torque motor, it has been possible to provide electronic control of pulse rate and stroke volume. Flow and pressure recordings in dogs undergoing left-heart bypass are nearly physiological. View full abstract»

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  • 1969 Neuroelectric Conference-Electroneuroprothesis, Electroanesthesia, and Nonconvulsive Electrotherapy [Report]

    Publication Year: 1970, Page(s):81 - 82
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (586 KB)

    The medical use of electrical current was the theme of the Fifth Neuroelectric Society Conference held in San Francisco, Calif., USA, February 26-28, 1969. The interdisciplinary conference, arranged by Stanford Research Institute, was attended by 200 scientists and provided continuity with previous Iueetings onl electroanesthesia and electrosleep. Sections on electroneuroprosthesis, bioinstrumenta... View full abstract»

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  • Letter to the editor

    Publication Year: 1970, Page(s): 82
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  • Abstracts of dissertations

    Publication Year: 1970, Page(s):83 - 89
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  • Keyword Abstracts

    Publication Year: 1970, Page(s):90 - 96
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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
University of Minnesota