Statistically Based Decompression Tables X: Real-Time Decompression Algorithm Using a Probabilistic Model.

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Statistically Based Decompression Tables X: Real-Time Decompression Algorithm Using a Probabilistic Model.

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dc.contributor NAVAL MEDICAL RESEARCH INST BETHESDA MD en_US
dc.contributor.author Survanshi, SS en_US
dc.contributor.author Weathersby, PK en_US
dc.contributor.author Thalmann, ED en_US
dc.date.accessioned 2006-08-30T03:19:31Z
dc.date.available 2006-08-30T03:19:31Z
dc.date.issued 1996 en_US
dc.identifier.govdoc ADA308010 en_US
dc.identifier.govdoc NMRI-96-06 en_US
dc.identifier.govdoc XB-NMRDC en_US
dc.identifier.other PE63713N en_US
dc.identifier.other WU1002 en_US
dc.identifier.other WUDN177792 en_US
dc.identifier.uri http://archive.rubicon-foundation.org/3411
dc.description Citation Status: Active; Citation Classification: Unclassified; Title Classification: Unclassified; Report Classification: Unclassified; Identifier Classification: Unclassified; Abstract Classification: Unclassified; Distribution Limitation(s): 01 - APPROVED FOR PUBLIC RELEASE; Information provided by the Department of Defense and the Defense Technical Information Center (http://www.dtic.mil/) is considered public information and may be distributed or copied unless otherwise specified. Use of appropriate byline/photo/image credits is requested. en_US
dc.description.abstract Underwater decompression meters or computers sense a diver's changes of depth in real-time and calculate a decompression schedule for the individual diver's exposure. Currently available devices compare calculated nitrogen tissue tensions to a set of stored 'safe' constants. No explicit quantitative connection between these rules and the risk of decompression sickness has been established. Well calibrated probabilistic models, even though computationally more intense, can be used to specify decompression procedures tailored to control the risk of decompression sickness. Probabilistic models allow conscious choice of the degree of 'safety' or acceptable risk. Previously, the choice required searching up to tens of thousands of possibilities for any given dive. That method cannot be employed in real time without a very fast computer. We describe a quicker search method that depends upon a 'recent optimal' solution so that it can be implemented in real time. The real time algorithm compared favorably with decompression schedules obtained by extensive searches. Timing requirements for updating calculations (important for hardware specification) depends on how fast the 'recent optimal' answer changes. Risk management for repetitive diving is described in terms of conditional probability. The algorithm can be used to permit the acceptable risk level to vary during real time as the dive severity increases, and to include multiple breathing gases. en_US
dc.format.extent 76799375 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.rights Citation Status: Active; Citation Classification: Unclassified; Title Classification: Unclassified; Report Classification: Unclassified; Identifier Classification: Unclassified; Abstract Classification: Unclassified; Distribution Limitation(s): 01 - APPROVED FOR PUBLIC RELEASE; Information provided by the Department of Defense and the Defense Technical Information Center (http://www.dtic.mil/) is considered public information and may be distributed or copied unless otherwise specified. Use of appropriate byline/photo/image credits is requested. en_US
dc.subject ALGORITHMS en_US
dc.subject PROBABILITY en_US
dc.subject STATISTICAL DATA en_US
dc.subject TABLES(DATA) en_US
dc.subject DIVERS en_US
dc.subject DECOMPRESSION SICKNESS en_US
dc.subject MATHEMATICAL MODELS en_US
dc.subject REQUIREMENTS en_US
dc.subject OPTIMIZATION en_US
dc.subject RISK en_US
dc.subject MANAGEMENT en_US
dc.subject EXPOSURE(GENERAL) en_US
dc.subject REAL TIME en_US
dc.subject SPECIFICATIONS en_US
dc.subject COMPUTERS en_US
dc.subject DEPTH en_US
dc.subject SOLUTIONS(GENERAL) en_US
dc.subject SCHEDULING en_US
dc.subject CONSTANTS en_US
dc.subject MEASURING INSTRUMENTS en_US
dc.subject SEARCHING en_US
dc.subject SAFETY en_US
dc.subject CALIBRATION en_US
dc.subject DIVING en_US
dc.subject UNDERWATER en_US
dc.subject DECOMPRESSION en_US
dc.subject TIME STUDIES en_US
dc.subject BREATHING GASES en_US
dc.title Statistically Based Decompression Tables X: Real-Time Decompression Algorithm Using a Probabilistic Model. en_US

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