The covariance between counting process martingales is used to characterize the dependence between two failure time variates. A representation of the bivariate survivor function is obtained in terms ...

This is a preview. Log in through your library . Abstract We consider the problem of estimating an unknown covariance function of a Gaussian random field for data collected by a polar-orbiting ...

Often the time derivative of a measured variable is of as much interest as the variable itself. For a growing population of biological cells, for example, the population’s growth rate is typically ...