Loading...
12 results
Search Results
Now showing 1 - 10 of 12
- Smart mobility: a surveyPublication . Faria, Ricardo; Brito, Lina; Baras, Karolina; Silva, JoséInternet of Things (IoT) describes a world where everyday objects are always connected to the Internet, allowing them to communicate and interact with each other. By connecting these everyday objects to the Internet and making them available everywhere at any time, IoT allows to remotely monitor, manage, and gather status information about them and their surrounding environment. IoT is a revolutionary concept that brought new experiences to everyday life and enabled Smart City initiatives all over the world. These initiatives are using a combination of technology paired with physical infrastructure and services, to improve people’s quality of life. One of the high priority domain to support the Smart City’s vision is the field of Smart Mobility. This paper reviews the current IoT approaches and concepts related to Smart Cities and Smart Mobility. In addition, it analyzes distinct features and numerous applications covering both Intelligent Transportation and Real Time Traffic Management Systems.
- Smart mobility: a mobile approachPublication . Faria, Ricardo; Brito, Lina; Baras, Karolina; Silva, JoséThe Internet of Things (IoT) is one of the key ingredients for the real ization of Smart Cities. IoT devices are essential components of the Smart Cities infrastructure, as they can provide information collected from the environment through sensors or allow other systems to reach out and act on the world through actuators. IoT data collection, however, is not limited to sensors and machines, but to data from social networks, and the web. Social networks have a huge im pact on the amount of data being produced daily, becoming an increasingly cen tral and important data source. The exploitation of these data sources, combined with the growing popularity of mobile devices, can lead to the development of better solutions to improve people’s quality of life. This paper discusses how to take advantage of the benefits of mobile devices and the vast range of information sources and services, such as traffic conditions, and narrow, closed or conditioned roads data. The proposed system uses a real-time collection, organization, and transmission of traffic and road conditions data to provide efficient and accurate information to drivers. With the purpose of supporting and improving traffic data collection and distribution, an Android application was developed to collect in formation about extraordinary events that take place in a city, providing warnings and alternative routes to drivers and helping them to improve their time manage ment. The developed solution also exploits the existing gaps in other applications, implementing a more specific solution for the Madeira Island traffic condition problems.
- Automatic monitoring and control of museums’ environment based on Wireless Sensor NetworksPublication . Rodríguez Peralta, L. M.; Brito, L. M. P. L.; Gouveia, B. A. T.; Sousa, D. J .G.; Alves, C. S.In museums, it is critical to properly conserve the existing artwork. For this purpose, it is fundamental to continuously monitor its environment, either in storage or exhibition rooms. Contrarily to traditional measuring equipments and procedures used in museums, the deployment of a Wireless Sensor Network (WSN) can help to implement these measurements continuously, in a real-time basis, and in a much easier and cheaper way. This is the main objective of the WISE-MUSE project, which proposes the use of WSNs for museums’ environmental and structural monitoring, and automatic environmental control. In this paper, the implementation and the main results of the WISE-MUSE project, which was carried out in a contemporary art museum, are described. Among other important contributions that will also be described in this paper, the development of a new wireless sensor node and a Web-based visualization tool, which bring some considerable advantages when compared with other commercially available solutions, are emphasized.
- A hierarchical and generic model for context-awareness in collaborative wireless sensor networksPublication . Brito, Lina Maria Pestana Leão de; Rodriguez Peralta, Laura Margarita
- Overview of context-sensitive technologies for well-beingPublication . Freitas, André; Brito, Lina; Baras, Karolina; Silva, JoséToday smart devices such as smartphones, smartwatches and activity trackers are widely available and accepted in most developed societies. These devices present a broad set of sensors capable of extracting detailed information about different situations of daily life, which, if used for good, have the potential to improve the quality of life not only for individuals but also for the society in general. One of the key areas where this type of information can help to improve the quality of life is in healthcare since it allows to monitor and infer the current level of well-being of the smart devices carriers. In this paper, some of the available literature about well-being sensing through context-aware data is reviewed. Also, the main types of mechanisms used in these studies are identified. These mechanisms are related to monitoring, generalization, inference, feedback, energy management and privacy. Furthermore, a description of the mechanisms used in each study is presented.
- A collaborative model for representing wireless sensor networks' entities and propertiesPublication . Brito, Lina M. Pestana Leão de; Rodríguez Peralta, Laura M.Wireless sensor nodes are, typically, resource limited. Therefore, the major functions of the Wireless Sensor Network (WSN) cannot be accomplished without collaboration among sensor nodes. In this paper, we present the Wireless Sensor Networks Supported Cooperative Work (WSNSCW) model. The key contribution of this model, when comparing to other models, is allowing for the representation of all the components and properties of a WSN. We also present the main entities and properties of this graph-based model, as well as its formalization.
- Towards a novel optical access networks management solution: addressing general management complexityPublication . Gonçalves, Tiago; Baras, Karolina; Brito, LinaPast technological advances and an increasing need to communicate have led to the creation of the current telecommunications networks. A critical part of a telecommunications network is the access network, since it must bridge the clients with the services provided, ensuring an efficient connection between them. In the last few years, both governments and organizations from several countries have adopted large fiber optics implementations in their access networks, given its broadband capabilities. However, the structure of such networks can become very complex, forcing organizations to use means that allow them to efficiently manage such complexity. Several software solutions available on the market are capable of providing management features for these networks, but the complexity of these solutions can negatively affect management, making it lengthy and error-prone. In this paper, we describe the initial development of a software solution, consisting of a set of integrated tools that will make optical access networks management more efficient by addressing the complexity limitations of the current solutions. One of the tools, presented in this paper, was tested with a local ISP (Internet Service Provider) and showed to be capable of overcoming the limitations faced by the organization on managing their optical access network.
- Modeling wireless sensor networks using a collaborative graph-based modelPublication . Rodríguez Peralta, Laura M.; Brito, Lina M. Pestana Leão de; Hernández, Eduardo Ismael: In several application scenarios, like the case of structural monitoring, it is important to model and represent the Wireless Sensor Networks (WSN) to be deployed. To model the components and properties of entire WSN types of collaboration in WSNs, we have created the Collaborative Wireless Sensor Networks (CWSN) model. This model also models the different types of collaboration that occur in a WSN. Our main goal is to provide a theoretical mathematical foundation that can model and analyze WSNs. Our approach is based on graph theory and propositional logic. The main contribution of this paper is applying the CWSN model to describe and represent a WSN. The use of the CWSN model brings several advantages, such as enabling the graphical representation of the state of the network and of several important properties: 1) the network topology; 2) the transmission between nodes considering a multi-hop communication; 3) the transmission hierarchy; 4) the evolution of the networks through a succession of graphs; and so on. Copyright © 2015 IFSA Publishing, S. L
- Providing adaptive traffic routing based on user and network contextPublication . Spinola, Sergio S.; Oliveira, André L. C.; Silva, Joatham P. S.; Muakad, Carlos F. J.; Sampaio, Paulo N. M.; Brito, Lina M. P. L.Providing real-time traffic guarantees and fairness based on the availability of network resources has been a major issue presented in the literature. However, due the convergent nature of digital architectures, the increasing demand of upcoming real-time sensitive traffic, such as VoIP, and a higher user´s adaptability (devices, global positioning, content quality, etc.), solutions based on Quality of Service (QoS) turned out to be insufficient in order to meet user´s requirements. Indeed, QoS metrics are network-centered, and mostly related to the dynamic nature of the traffic (such as throughput, delay, jitter, among others). In order to meet the need for a user-centered network, this paper proposes a context-aware solution where the concepts of Quality of Service, Quality of Experience and Adaptive Routing are integrated in order to provide a more dynamic and pro-active approach for the delivery of context-oriented time-sensitive traffic.
- An integrating platform for environmental monitoring in museums based on wireless sensor networksPublication . Rodríguez Peralta, Laura M.; Brito, Lina M. Pestana Leão deMonitoring the museum’s environment for preventive conservation of art purposes is one major concern to all museums. In order to properly conserve the artwork it is critical to continuously measure some parameters, such as temperature, relative humidity, light and, also, pollutants, either in storage or exhibition rooms. The deployment of a Wireless Sensor Network in a museum can help implementing these measurements in real-time, continuously, and in a much easier and cheap way. In this paper, we present the first testbed deployed in an Contemporary Art Museum, located in Madeira Island, Portugal, and the preliminary results of these experiments. On the other hand, we propose a new wireless sensor node that offers some advantages when compared with several commercially available solutions. Furthermore, we present a system that automatically controls the dehumidifying devices, maintaining the humidity at more constant levels.