Unidos na Prevenção: concepção regulada de dispositivos de comunicação para o envolvimento dos cidadãos no controlo de uma infestação

2º Workshop África Annes - Do envolvimento à participação: o papel da comunicação na gestão de riscos. Universidade dos Açores, Campus do Pico da Urze, Angra do Heroísmo, Açores, Portugal, 20 a 22 de Julho de 2011,A térmita de madeira seca C. brevis constitui actualmente a praga urbana mais preocupante dos Açores. Dados da percepção de risco permitiram compreender que o alegado alheamento dos cidadãos face ao problema se encontrava na incontrolabilidade da praga (impossível de erradicar) e do sistema de gestão accionado (sentido como ineficaz na capacidade de dar resposta às necessidades sociais existentes). Um risco de complexidade induzida causado por uma falta de confiança mútua entre cidadãos e instituições requerendo a mediação das diferentes perspetivas e interesses em presença, uma vez que cada um dos stakeholders (decisores políticos, investigadores e cidadãos) se acusavam reciprocamente da responsabilidade pelo agravamento da infestação

Service Provisioning in Edge-Cloud Continuum Emerging Applications for Mobile Devices

Disruptive applications for mobile devices can be enhanced by Edge computing facilities. In this context, Edge Computing (EC) is a proposed architecture to meet the mobility requirements imposed by these applications in a wide range of domains, such as the Internet of Things, Immersive Media, and Connected and Autonomous Vehicles. EC architecture aims to introduce computing capabilities in the path between the user and the Cloud to execute tasks closer to where they are consumed, thus mitigating issues related to latency, context awareness, and mobility support. In this survey, we describe which are the leading technologies to support the deployment of EC infrastructure. Thereafter, we discuss the applications that can take advantage of EC and how they were proposed in the literature. Finally, after examining enabling technologies and related applications, we identify some open challenges to fully achieve the potential of EC, and also research opportunities on upcoming paradigms for service provisioning. This survey is a guide to comprehend the recent advances on the provisioning of mobile applications, as well as foresee the expected next stages of evolution for these applications

Socially Inspired Data Dissemination for Vehicular Ad Hoc Networks

International audiencePeople have routines and their mobility patterns vary during the day, which have a direct impact on vehicular mobility. Therefore, proto-cols and applications designed for Vehicular Ad Hoc Networks need to adapt to these routines in order to provide better services. With this issue in mind, in this work, we propose a data dissemination solution for these networks that considers the daily road traffic vari-ation of large cities and the relationship among vehicles. The focus of our approach is to select the best vehicles to rebroadcast data messages according to social metrics, in particular, the clustering coefficient and the node degree. Moreover, our solution is designed in such a way that it is completely independent of the perceived road traffic density. Simulation results show that, when compared to related protocols, our proposal provides better delivery guarantees, reduces the network overhead and possesses an acceptable delay

Data Communication in VANETs: Survey, Applications and Challenges

International audienceVANETs have emerged as an exciting research and application area. Increasingly vehicles are being equipped with embedded sensors, processing and wireless communication capabilities. This has opened a myriad of possibilities for powerful and potential life-changing applications on safety, efficiency, comfort, public collaboration and participation, while they are on the road. Although, considered as a special case of a Mobile Ad Hoc Network, the high but constrained mobility of vehicles bring new challenges to data communication and application design in VANETs. This is due to their highly dynamic and intermittent connected topology and different application's QoS requirements. In this work, we survey VANETs focusing on their communicationand application challenges. In particular, we discuss the protocol stack of this type of network, and provide a qualitative comparison between most common protocols in the literature. We then present a detailed discussion of dfferent categories of VANET applications. Finally, we discuss open research problems to encourage the design of new VANET solutions

A hybrid energy-aware video bitrate adaptation algorithm for mobile networks

The number of mobile devices that use video streaming applications has been steadily rising year after year. Platforms responsible for providing multimedia service face great challenges in delivering high-quality content for mobile users. One main problem in sharing video flows is the high energy consumption in mobile devices, which reduces their lifetime. A video adaptation approach with Quality of Experience (QoE) support is a key issue to increase the user experience while watching videos as well as reduce the energy consumption in mobile devices. In this paper, we propose a hybrid energy-aware video bitrate adaptation algorithm to deliver videos with high QoE and energy-efficiency for mobile users. Simulation results show the efficiency of the proposed algorithm compared to existing adaptation video bitrate algorithms, reducing the number and duration of stalls, as well as saving energyCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES00115th Annual conference on wireless on-demand network systems and services (WONS)2019Wengen, Suíç