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    APPENDIX TWR1 - THE LADS DEVICE

    Tuesday, September 09, 1997 10:20:09 AM

    VSE CORP. LIFE ASSESMENT DECTECTOR SYSTEM (LADS)
    Patent Pending

    The Life Assessment Detector System (LADS), a microwave Doppler
    movement measuring device, can detect human body surface motion,
    including heartbeat and respiration, at ranges up to 135 feet
    (41.15 meters). The primary function of the LADS is to provide a
    reliable method by which medical and emergency personnel can
    locate personnel buried in building collapses or injured on the
    military battlefield.

    LADS can detect such signs of life as movement, heartbeat, or
    respiration.

    ** NOTE: The referenced image of the LADS device is no longer
    available at the http://www.vsecorp.com web site.  What it showed
    was mainly a small dish antenna mounted on the top of a tripod.
    (August 9, 1998)

    Originally designed to detect heartbeat and respiration of military
    personnel wearing chemical-biological warfare protective
    overgarments, the LADS has been restructured, greatly increasing its
    operational range and providing a means for eliminating
    "nuisance alarms" which could mimic human life signs, such
    as fans, wind drafts, or swaying trees.  This is accomplished through
    neural network technology, which "trains" the system to
    recognize human motion and heartbeat/respiration functions.  If these
    functions are not detected, the reasonable assumption is that there
    are no survivors. Operating under such an assumption, the rescue team
    can now proceed without fear of further loss of life; i.e., rescue
    and medical personnel and equipment can be deployed more effectively
    and efficiently.

    The LADS consists of a sensor module, a neural network module, and
    a control/monitor module.  The sensor module is an x-band (10 GHz)
    microwave transceiver with a nominal output power of 15 milliwatts,
    operating in the continuous wave (CW) mode. The neural network module
    device can store many complex patterns such as visual waveforms and
    speech templates, and  can easily compare input patterns to
    previously "trained" or stored patterns.

    The control/monitor module provides the LADS' instrument controls,
    such as on-off switches, circuit breakers, and battery condition, as
    well as motion, heartbeat waveform, pulse strength, and pulse rate
    displays.
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