. If the validation succeeds, the code is guaranteed to respect the safety policy without relying on run-time checks. The main practical difficulty of PCC is in generating the safety proofs. In order to gain some preliminary experience with this, we have written several network packet filters in hand-tuned DEC Alpha

FlexRTS is a dynamically configurable and extensible run-time system for Orca, a high performance parallel programming system. It provides run-time and application programmers with full control over the implementation and placement of kernel and user-level modules (device drivers, protocol stacks

. Extensions allow an application to specialize the underlying operating system in order to achieve a particular level of performance and functionality. SPIN uses language and link-time mechanisms to inexpensively export ne-grained interfaces to operating system services. Extensions are written in a type safe

application and one hardware configuration. We present three different applications of dynamic reconfiguration, based on research activities at Glasgow University, and extract a set of common requirements. We present the design of an extensible run-time system for managing the dynamic reconfiguration of FPGAs

application and one hardware configuration. We present three different applications of dynamic reconfiguration, based on research activities at Glasgow University, and extract a set of common requirements. We present the design of an extensible run-time system for managing the dynamic reconfiguration of FPGAs

that it is difficult to implement, difficult to tune, and only reliable for systems which are almost linear on the time scale of the update intervals. In this paper a new linear estimator is developed and demonstrated. Using the principle that a set of discretely sampled points can be used to parameterise mean

# compiler, and the Boogie static program verifier. The language includes constructs for writing specifications that capture programmer intentions about how methods and data are to be used, the compiler emits run-time checks to enforce these specifications, and the verifier can check the consistency

various limitations of current recommendation methods and discusses possible extensions that can improve recommendation capabilities and make recommender systems applicable to an even broader range of applications. These extensions include, among others, an improvement of understanding of users and items

and run-time mechanisms that support mobility, and techniques for implementing mobility that do not degrade the performance of local operations. Performance measurements of the current implementation are included.

, the Cilk scheduler achieves space, time, and communication bounds all within a constant factor of optimal. The Cilk rmrtime system currently runs on the Connection Machine CM5 MPP, the Intel Paragon MPP, the Silicon Graphics Power Challenge SMP, and the MIT Phish network of workstations. Applications