D. L. J. Alexander

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The statistical metrics used to characterize the external predictivity of a model, i.e., how well it predicts the properties of an independent test set, have proliferated over the past decade. This paper clarifies some apparent confusion over the use of the coefficient of determination, R(2), as a measure of model fit and predictive power in QSAR and QSPR(More)
Virtual organizations are interested in providing secure grid-related services to individual scientist users through portals and invest significant time and effort in managing them. Systems are often in place for users to request and receive grid certificates in many grid infrastructures as a basis for their identity in the grid. These identities are,(More)
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