72 research outputs found
An Integration Gateway for Sensing Devices in Smart Environments
No full textSmart Environments, and in particular Smart Homes, have recently attracted the attention of many
researchers and industrial vendors. The proliferation of low-power sensing devices requires
integration gateways hiding the complexity of heterogeneous technologies. We propose a ZigBee
integration gateway to access and integrate low-power ZigBee devices
Service discovery in mobile social networks
No full textWe present a new service discovery algorithm, termed SIDEMAN, which considers human mobility for service dissemination and discovery. SIDEMAN takes advantage of mobile social networking characteristics, such as user membershIP to a restricted number of communities and interest for similar services among users in the same community. We evaluated the performance of SIDEMAN via simulations in a scenario based on traces collected at the IEEE conference Infocom in 2006. Our algorithm has been compared to the social version of two popular data dissemination techniques, namely, flooding and gossIPing. We have measured how proactive an algorithm is in distributing services of interest (Recall), how many services are already with a user when they are needed (Gain), the energy cost for service discovery, and the time needed to reply a service query. We show that SIDEMAN obtains perfect Recall and a Gain that is always comparable to that of the other algorithms. Furthermore, most services are retrieved in reasonable time and at a lower energy cost than that of the flooding and gossIPing-based solutions
EvAAL: Evaluating AAL Systems through Competitive Benchmarking
No full textOwing to the complexity of Ambient Assisted Living (AAL) systems and platforms, the evaluation of AAL solutions is a complex task that will challenge researchers for years to come. However, the analysis and comparison of proposed solutions is paramount to enable us to assess research results in this area. We have thus organized an international contest called EvAAL: Evaluating AAL Systems through Competitive Benchmarking. Its aims are to raise interest within the research and developer communities in the multidisciplinary research fields enabling AAL, and to create benchmarks for the evaluation and comparison of AAL systems
Experimental investigation of reinforced bonded joints for composite laminates
No full textAn experimental study has been carried out to investigate the behaviour of co-bonded carbon fibre reinforced plastics joints with a novel design incorporating a through the thickness local reinforcement. Different specimens were manufactured to investigate static and fatigue behaviour, as well as delamination size after impact and damage tolerance characteristics. The mechanical performances of the specimens with local reinforcement, consisting of the insertion of spiked thin metal sheets between co-bonded laminates, were compared with those ones obtained from specimens with purely co-bonded joints. This novel design demonstrated by tests that damage progression under cycling load results significantly delayed by the reinforcements. A significant number of experimental results were obtained that can be used to define preliminary design guidelines.Aerospace Structures & Computational Mechanic
SIDEMAN: Service discovery in mobile social networks
No full textIn this paper we present SIDEMAN, a service discovery algorithm that exploits human mobility patterns in Mobile Social Networks (MSN). SIDEMAN takes advantage of two aspects of MSN, namely, that users tend to form communities, and that users in the same community share interests for similar services. The performance of SIDEMAN has been evaluated through simulations in real and synthetic scenarios: A set of traces collected at IEEE Infocom 2006 and traces obtained from the HCMM mobility model, respectively.We have compared our algorithm to the social version of two popular discovery techniques, namely, flooding and gossiping. We investigated the following key metrics: How proactive an algorithm is in distributing services of interest (Recall); how many services are already with a user when s/he needs them (Gain); the energy cost necessary for service discovery; the time needed to reply to a service query, and the average number of services stored and exchanged. Our results show that in all considered scenarios SIDEMAN is remarkably effective in obtaining flawless Recall and a Gain that is always comparable to that of the other algorithms. Furthermore, most services are retrieved in reasonable time and at a remarkably lower energy cost than that of flooding and gossiping-based solutions
A Service-Oriented ZigBee Gateway for Smart Environments
No full textIn the recent past Smart Environments, and in particular Smart Homes, have attracted the attention of many researchers and industrial vendors. In such environments, according to the Ambient Intelligence paradigm, heterogeneous devices may operate collectively using context information and intelligence that is usually hidden in the home networks. The networks of ZigBee devices play an important role in this scenario. However they require an easier interaction model with IP-based networks. This work presents an open source platform that seamlessly integrates ZigBee devices with applications running on smart phones and other connected devices available at home. It can be deployed on low-cost devices, such as Plug-PC, and it exploits the OSGi execution environment to discover devices and to notify the smart home of new available services. © 2014-IOS Press and the authors
The Integration of ZigBee with the GiraffPlus Robotic FrameworkEvolving Ambient Intelligence
No full text- …
