The history and current practice of resit tests are briefly reviewed.The evidence supporting resits and also the problems associated with resits are evaluated.In addition, the financial implications of resits for both students and institutions are explored, along with the need to ensure assessments establish currency of ability and are a reflection

To maintain safety and reliability of reactors, redundant sensors are usually used to measure critical variables and estimate their averaged time-dependency.Nonhealthy sensors can badly influence the estimation result of the process variable.Since online condition monitoring was introduced, the online cross-calibration method has been widely used t