We embed an untyped security protocol model in the interactive theorem prover Isabelle/HOL and derive a theory for constructing proofs of secrecy and authentication properties. Our theory is based on two key ingredients. The first is an inference rule for enumerating the possible origins of messages known to the intruder. The second is a class of protocol-specific invariants that formalize type...

We deene the concept of phase in interactive theory development and relate it to interface modes by considering the information required in each phase of theory development. The design of an experimental trial to investigate information requirement is described.

pairing theory with methodology, this study demonstrates how efl teachers’ limited wait-time practice structures in and affects the structuring of the unfolding classroom discourse with reference to learners’ participation opportunities. informed by the tenets of conversation analysis, we have observed, videotaped, and transcribed line-by-line 10 efl teachers’ naturally-occurring classroom inte...

This paper explores the role of coinductive methods in modeling finite interactive computing agents. The computational extension of computing agents from algorithms to interaction parallels the mathematical extension of set theory and algebra from inductive to coinductive models. Maximal fixed points are shown to play a role in models of observation that parallels minimal fixed points in induct...

Girard [10] introduced Ludics as an interactive theory aiming at overcoming the distinction between syntax and semantics in logic. In this paper, we investigate how ludics could serve as a foundation for logic programming, providing a mechanism for interactive proof search, that is proof search by interaction (or proof search by cut-elimination).

At the atomic scale, interactive physically-based modeling tools are more and more in demand. Unfortunately, solving the underlying physics equations at interactive rates is computationally challenging. In this dissertation, after presenting a review of theories and algorithms for interactive electronic structure computations, we propose new algorithms that allow for interactive modeling of che...