Safe functional systems through integrity types and verified assembly

the effect of functional/notional approach on the proficiency level of efl learners and its evaluation through functional test

in fact, this study focused on the following questions: 1. is there any difference between the effect of functional/notional approach and the structural approaches to language teaching on the proficiency test of efl learners? 2. can a rather innovative language test referred to as "functional test" ge devised so so to measure the proficiency test of efl learners, and thus be as much reliable an...

Totally Verified Systems: Linking Verified Software to Verified Hardware

Synthesising verified access control systems through model checking

We present a framework for evaluating and generating access control policies. The framework contains a modelling formalism called RW, which is supported by a model checking tool. RW is designed for modelling access control policies, and verifying their properties. The RW language is very expressive, allowing us to model complex access conditions which can depend on data values, other permission...

From a Verified Kernel towards Verified Systems

The L4.verified project has produced a formal, machinechecked Isabelle/HOL proof that the C code of the seL4 OS microkernel correctly implements its abstract implementation. This paper briefly summarises the proof, its main implications and assumptions, reports on the experience in conducting such a large-scale verification, and finally lays out a vision how this formally verified kernel may be...

Psycho-neural reduction through functional sub-types

The paper argues that a functional reduction of ordinary psychology to neuropsychology is possible by means of constructing fine-grained functional, mental sub-types that are coextensive with neuropsychological types. We establish this claim by means of considering as examples the cases of the disconnection syndrome and schizophrenia. We point out that the result is a conservative reduction, vi...