VISUAL CONTRACTS: A way to reason about states and cardinalities in IT system specifications
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Decision support systems can be used to manage systems. Managed systems are described by system specifications. System specification notations, such as UML, often separate in different diagrams the static specification and the dynamic specification of the ...
The tolerance theory by Arora and Kulkarni views a fault-tolerant program as the composition of a fault-intolerant program and fault tolerance components called detectors and correctors.At its core, the theory assumes that the correctness specifications un ...
The concept of Unreliable failure detectors for reliable distributed systems was introduced by Chandra and Toueg as a fine-grained means to add weak forms of synchrony into asynchronous systems. Various kinds of such failure detectors have been identified ...
This paper studies the semantics of protocol modules composition and interaction in configurable communication systems. We present a semantic model describing Cactus and Appia -- two frameworks that are used for implementing modular systems. The model cove ...
We present an example of a construction of an embedded software system-a controller-from the formal specification to executable code. The CO-OPN (Concurrent Object Oriented Petri Net) formal specification language is used for modelling the controller and t ...
This paper studies the semantics of protocol modules composition and interaction in configurable communication systems. We present a semantic model describing the x-kernel, Cactus and Appia --- three frameworks that are used for implementing modular system ...
Program verification tools (such as model checkers and static analyzers) can find many errors in programs. These tools need formal specifications of correct program behavior, but writing a correct specification is difficult, just as writing a correct progr ...
Program verification is a promising approach to improving program quality, because it can search all possible program executions for specific errors. However, the need to formally describe correct behavior or errors is a major barrier to the widespread ado ...
We give a formal specification for a real-time controller for trains that operate on the Italian railway network. The controller will control train movements and is part of a larger system destined to guarantee safety with respect to dangers originating fr ...
The concept of unreliable failure detectors for reliable distributed systems was introduced by Chandra and Toueg as a fine-grained means to add weak forms of synchrony into asynchronous systems. Various kinds of such failure detectors have been identified ...
