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Publicações

Publicações por HASLab

2024

Overview on Constrained Multiparty Synchronisation in Team Automata

Autores
Proença, J;

Publicação
FORMAL ASPECTS OF COMPONENT SOFTWARE, FACS 2023

Abstract
This paper provides an overview on recent work on Team Automata, whereby a network of automata interacts by synchronising actions from multiple senders and receivers. We further revisit this notion of synchronisation in other well known concurrency models, such as Reo, BIP, Choreography Automata, and Multiparty Session Types. We address realisability of Team Automata, i.e., how to infer a network of interacting automata from a global specification, taking into account that this realisation should satisfy exactly the same properties as the global specification. In this analysis we propose a set of interesting directions of challenges and future work in the context of Team Automata or similar concurrency models.

2024

Team Automata: Overview and Roadmap

Autores
ter Beek, MH; Hennicker, R; Proença, J;

Publicação
COORDINATION MODELS AND LANGUAGES, COORDINATION 2024

Abstract
Team Automata is a formalism for interacting component-based systems proposed in 1997, whereby multiple sending and receiving actions from concurrent automata can synchronise. During the past 25+ years, team automata have been studied and applied in many different contexts, involving 25+ researchers and resulting in 25+ publications. In this paper, we first revisit the specific notion of synchronisation and composition of team automata, relating it to other relevant coordination models, such as Reo, BIP, Contract Automata, Choreography Automata, and Multi-Party Session Types. We then identify several aspects that have recently been investigated for team automata and related models. These include communication properties (which are the properties of interest?), realisability (how to decompose a global model into local components?) and tool support (what has been automatised or implemented?). Our presentation of these aspects provides a snapshot of the most recent trends in research on team automata, and delineates a roadmap for future research, both for team automata and for related formalisms.

2024

Reactive Graphs in Action

Autores
Tinoco, D; Madeira, A; Martins, MA; Proença, J;

Publicação
Formal Aspects of Component Software - 20th International Conference, FACS 2024, Milan, Italy, September 9-10, 2024, Proceedings

Abstract

2024

Message from the VERDI Workshop Chairs; DSN-W 2024

Autores
Pereira, D; Proença, J; Sangchoolie, B;

Publicação
54th Annual IEEE/IFIP International Conference on Dependable Systems and Networks, DSN 2024 - Workshops, Brisbane, Australia, June 24-27, 2024

Abstract

2024

Reducing the gap between theory and practice in real-time systems with MARS

Autores
Nandi, GS; Pereira, D; Proença, J; Tovar, E; Nogueira, L;

Publicação
2024 54TH ANNUAL IEEE/IFIP INTERNATIONAL CONFERENCE ON DEPENDABLE SYSTEMS AND NETWORKS-SUPPLEMENTAL VOLUME, DSN-S 2024

Abstract
A significant number of dependable systems rely on scheduling algorithms to achieve temporal correctness. Despite their relevance in real-world applications, only a narrow subset of the works in the literature of real-time systems are readily available to be reproduced in real-world hardware platforms. This lack of support not only hinders the reproducibility of research results, but also reduces the opportunity for new platform-specific research directions to emerge. In this work we discuss the use and development of an open-source tool named MARS capable of porting various scheduling tests and algorithms to hardware platforms used in distributed real-time dependable systems.

2024

MARS: Safely Instrumenting Runtime Monitors in Real-Time Resource-Constrained Distributed Systems

Autores
Nandi, GS; Pereira, D; Proença, J; Tovar, E;

Publicação
22nd IEEE International Conference on Industrial Informatics, INDIN 2024, Beijing, China, August 18-20, 2024

Abstract
Advancements in the energy efficiency and computational power of embedded devices allow developers to equip resource-constrained systems with a greater number of features and more complex behavior. As complexity of a system grows, so does the difficulty in demonstrating its overall correctness. Formal methods have been successfully applied in a variety of verification and validation scenarios, but their wide adoption in the industry and academia is still lackluster. Among the explanations listed in the literature for the low adoption of these techniques are the perceived difficulty of getting into formal practices and how formal tools are not usually aimed at practical use cases. Striving to address these issues, we present MARS, an open-source domain-specific language for the safe instrumentation of runtime verification monitors into real-time resource-constrained distributed systems. Our main objective with MARS is to ease the integration of runtime verification monitors in distributed applications while also providing developers with evidence of their correct instrumentation in the context of systems where dependability and temporal requirements need to be respected even under extreme resource constraints. We present the language syntax, the set of tools embedded into its compiler, its functionalities, and a use case to exemplify its use in a practical distributed application. © 2024 IEEE.

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