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SCEC Technical Activity Groups ( TAGs )

SCEC Technical Activity Groups ( TAGs ). Self - organized to develop and test critical methodologies for solving specific types of forward and inverse problems Successful groups share a modus operandi: posing of well-defined “standard problems ”

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SCEC Technical Activity Groups ( TAGs )

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  1. SCEC Technical Activity Groups (TAGs) • Self-organized to develop and test critical methodologies for solving specific types of forward and inverse problems • Successful groups share a modus operandi: • posing of well-defined “standard problems” • solution of these problems by different researchers using different algorithms or codes • a common cyberspace for comparing solutions • meetings to discuss discrepancies and potential improvements

  2. SCEC Technical Activity Groups (TAGs) • Rupture Dynamics Code Verification • Source Inversion Verification • Earthquake Simulators • Geodetic Detectors • Ground Motion Simulation Validation

  3. Validation vs. Verification • Verification substantiates that a model “does what it is supposed to do” at a specified level of precision; e. g., the mathematics is correct and properly implemented, say, in a computer code. • Validation establishes that a model adequately describes the behavior of real systems within its proposed domain of applicability and that its epistemic uncertainties are properly characterized. • Verification can be accomplished by comparison with other models (e.g., through cross-validation), but validation requires the comparison of model results with observations.

  4. Ground Motion Simulation Validation TAG • What criteria should be imposed on SCEC ground motion simulations to qualify them for earthquake engineering applications? • Which engineering applications? • Which ground motion simulations? • Broadband platform • CyberShake platform • How should the activities of this TAG be coordinated internally within SCEC and externally with engineering partnerships (e.g., PEER)?

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