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Over the last two decades, an interesting area of Brazilian military and civil sectors is the Unmanned Aircraft Vehicle (UAV) development. This article tackles the modeling of conflicts resolution of Unmanned Aircraft System (UAS) using a lightweight Duration Calculus (DC) to verify if the temporal specification and design of the system is correct and to ensure formally that the system implementation meets all its requirements. Moreover, the article proposes a formal modeling (using DC) of a conflicts resolutions set of rules, adapted from Free Flight concept in Communications, Navigation and Surveillance/Air Traffic Management (CNS/ATM). In the adapted approach to UAS, each UAV is surrounded by an imaginary space of two cylinders, which form, respectively, the protected zone and the alert zone. The major contribution of this article is structuring a new scenario application of the conflicts resolution to UAS through formal modeling, using the DC technique to confirm that the models could be implemented without deadlocks and unreachable states, as well as with satisfaction of temporal restrictions. Furthermore, this work uses the state-ofthe-art practices in formal methods, including a model checking tool to ensuring correct real-time requirements specification of a real-time critical system.

Diversas aplicações de software vêm modificando o estilo de vida das pessoas em aspectos tecnológicos e sociais. Um conjunto dessas aplicações possibilitam a criação das chamadas Cidades Inteligentes (CIs). Assim como qualquer outro tipo de aplicação, estas aplicações precisam ser avaliadas para garantir uma qualidade adequada e fornecer uma melhor experiência aos usuários. Contudo, aplicações no contexto de CIs podem conter caracterı́sticas tecnológicas especı́ficas que não são avaliadas em aplicações tradicionais, tais como aspectos de interoperabilidade e mudança de contexto da aplicação de acordo com a alteração do ambiente do usuário. Desta forma, este artigo apresenta um estudo sobre a avaliação de duas caracterı́sticas de qualidade relevantes para CIs (sensibilidade ao contexto e calmness). Adicionalmente, apresentamos uma discussão sobre essas caracterı́sticas e suas métricas em relação aos aspectos humanos da interação com a aplicação.

During the design phase of avionics systems, the activity of selecting the physical components of an IMA platform and allocating the avionics system's applications into the chosen components may lead to several options to configure the given IMA architecture. The aeronautical industry already realized that this activity can be assisted by automated methods. Focusing on the communication allocation, this paper presents an approach for allocating application's data flows into physical communication resources of an IMA system able to deal with the main requirements, such as safety and performance, and also able to be extended to other criteria, as for instance maintainability and extensibility requirements. The approach is based on the Boolean satisfiability theory and linear programming. A case study is presented to evaluate its applicability.

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