In this article, a model-free feedback control design is proposed for the drug administration in mixed cancer therapy. This strategy is very attractive because of the important issue of parameter uncertainties unavoidable when dealing with biological models. The proposed feedback scheme use past measurements to update an on-line simplified model. The control design is then based on model predic...

While considerable advances in the understanding of atmospheric processes and feedbacks in the climate system have led to a better representation of these mechanisms in general circulation models, the greatest uncertainty in predictability of future climate arises from clouds and their interactions with radiation. To explore this uncertainty, the cloud resolving model has evolved as one of the ...

We develop control laws for the pendular motion of a spinning tethered satellite system. The control laws are developed using a simplified system model that contains unknown disturbance terms that account for unmodeled dynamics in the simplified model. Principles of sliding mode and adaptive nonlinear control design are used to develop control laws that drive the pendular motion to a desired re...

When defining Access Control Policies for XML Databases administrators need to make sure that they are not inconsistent, this is, that it is not possible to perform a forbidden operation through a sequence of allowed operations. This problem has been studied before for policies defined using authorizations based in insert, delete, replace and replaceVal types to control updates in documents tha...