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Bio-Medical Electronics, IRE Transactions on

Issue 3 • Date July 1962

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Displaying Results 1 - 17 of 17
  • [Table of contents]

    Publication Year: 1962 , Page(s): c1
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  • IRE Professional Group on Bio-Medical Electronics

    Publication Year: 1962 , Page(s): c2
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  • In defense of gadgeteering

    Publication Year: 1962 , Page(s): 175
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  • Present Status of Fetal Electrocardiography

    Publication Year: 1962 , Page(s): 176 - 180
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    Fetal electrocardiography, an infant but vigorous young discipline, seems to be rapidly emerging as a useful tool for that biological research and medical practice which concerns the unborn heart. Based upon wide experience, it will be useful to survey the status of fetal electrocardiography, pointing out the possibilities as well as limitations. The significance in terms of capability for early study of the developing heart, the diagnosis of fetal life, multiple pregnancy, origins of congenital heart disease, as well as the study of intrauterine difficulties as in labor is presented and discussed in detail. On the basis of a discussion of present-day instruments and the types of "noise" encountered, it is suggested that improved low-noise amplifiers are desirable; it is suggested further that the use of averaging, correlation, and other computer-based techniques may hold substantial promise. 9152. View full abstract»

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  • A Simple, Bidirectional, Transistor Switch for Sine-Wave Trains

    Publication Year: 1962 , Page(s): 181 - 184
    Cited by:  Papers (1)
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    Trains of sine waves of varying duration and frequency are sometimes required in auditory research or in experiments where nerve or muscle preparations are stimulated. One of the problems involved in such work is the need for a stimulus which is symmetrical to ground (pedestal-free) and which has a small rise time, so that the intensity-latency relationship can be correctly evaluated. It is sometimes also important to know the phase angle at which the sine wave has begun. A switch is described which was designed to meet these conditions. It uses a "normal" transistor in which the functions of the emitter and collector are interchanged periodically by a sinewave oscillator. The paper analyzes the behavior of a "normal" transistor as a bidirectional switch and describes how a suitable circuit can be designed. View full abstract»

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  • The SETAR and Its Uses for Recording Physiological and Behavioral Data

    Publication Year: 1962 , Page(s): 185 - 189
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    The SETAR (Serial Event Timer and Recorder) is an electronic digital elapsed-time recorder with punched paper tape output. It is a multichannel machine and will time and record the occurrence of successive events within a single channel or between different channels. An event is anything which will make or break one or more of the input circuits. The SETAR can directly record behavioral variables, such as reaction times and intertrial intervals and any physiological variables available as time measures, such as heart rate recorded from successive R-R intervals. The present machine will record in looths of a second and take readings up to ten times per second. Due to internal buffer storage three readings may be made at rates up to 100 per second. Events separated by less than 100th of a second are recorded as though they were simultaneous. The principles of operation of the machine and its methods of use in a psychophysiological laboratory are described. Future developments of higher speed recording and extended uses are discussed. View full abstract»

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  • An Automatic System for Processing Microelectrode Data

    Publication Year: 1962 , Page(s): 190 - 194
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    A data processing system has been designed and built which converts single unit microelectrode recordings obtained on analog magnetic tape into a punched paper tape record. The conversion process preserves the exact time sequence in which the neurological events occur. The punched paper tape record can be used to obtain hard copy via a "Flexowriter" and to punch IBM cards for computation on any one of a number of digital computing machines. It thereby permits detailed study by digital computers of such phenomena as spontaneous activity and adaptive cell processes during and after periods of stimulation. The basic method for obtaining the paper tape record is to slow down the playback of the original tape record by a factor of 50 or l00. This permits continuous analog to digital conversion of the intervals by a compact digital subsystem designed for this purpose. The measurements are encoded and presented to a tape perforator operating at 110 characters per second. A code character is inserted at the end of each interval measurement to identify the intervals as: stimulus-response, response-response, response-stimulus, stimulus-stimulus. Other uses of this coding symbol are possible. View full abstract»

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  • Echo Capsule for Medical Use (A Batteryless Endoradiosonde)

    Publication Year: 1962 , Page(s): 195 - 199
    Cited by:  Papers (11)  |  Patents (3)
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    A new type of a swallowable radio transmitter, ECHO CAPSULE, is described along with some clinical experiments. Unlike other similar capsules which have been reported, this capsule contains no battery and is energized from outside the human body. The energy is converted into dc by the transistor of the oscillator circuit itself, stored into a capacitor and then used as an energy source for the transmission of information on temperature, acidity or the like within the digestive tract. View full abstract»

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  • A Phase-Shift Ultrasonic Flowmeter

    Publication Year: 1962 , Page(s): 199 - 203
    Cited by:  Papers (1)  |  Patents (3)
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    An ultrasonic flowmeter using phase-shift techniques has been developed to measure phasic blood flow in animals. Lead zirconate titanate transducers are located diagonally opposed over the vessel so that 1-Mc ultrasound may be transmitted alternately upstream and downstream. The upstream and downstream transit times are measured by heterodyning the 1-Mc receiver crystal output to 10 kc, and then feeding this signal to an audio phasemeter. The phasemeter output is an ac signal whose magnitude represents flow velocity, and phase (relative to the chopper drive) indicates flow direction. The phasemeter output is amplified and synchronously detected to drive a recorder View full abstract»

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  • Transistor Equipment for Continuous Recording of Oriented Migratory Behavior in Birds

    Publication Year: 1962 , Page(s): 204 - 208
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    The migratory behavior of birds has been studied for over 30 years, but a more precise measurement of this behavior is needed to aid in the study of orientation and navigation during migration. The equipment developed for this purpose consists of eight small cages arranged along the axis of the major points of the compass and opening into a large center area. Each cage is provided with a transducer which responds to vibrations induced by a bird in that cage. A "count" is recorded and automatically printed at regular intervals from each cage, giving a permanent record of the bird's activity. Preliminary results indicate the system will provide reliable data on magnitude and orientation of a bird's activity. Data are presented for a bird in the natural migratory state and ones in which this state has been artificially induced or maintained. View full abstract»

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  • A Neuron Model Which Performs Analog Functions

    Publication Year: 1962 , Page(s): 209
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  • Comments on "Analog Computer Simulation of a Neural Element"

    Publication Year: 1962 , Page(s): 210 - 211
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    First Page of the Article
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  • Notice of Meeting of the Society for Psychophysiological Research

    Publication Year: 1962 , Page(s): 212
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  • PGBME Affiliates

    Publication Year: 1962 , Page(s): 212-a
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  • IRE Transactions on Bio-Medical Electronics Statement of Editorial Policy

    Publication Year: 1962 , Page(s): 212-b
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  • Information for authors

    Publication Year: 1962 , Page(s): 212b
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  • Institutional listings

    Publication Year: 1962 , Page(s): 212c
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Aims & Scope

This Transactions ceased publication in 1962. The current retitled publication is Biomedical Engineering, IEEE Transactions on

Full Aims & Scope