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Komninos A.,Glasgow Caledonian University | Plessas A.,University of Patras | Plessas A.,Computer Technology Institute Diophantus | Stefanis V.,University of Patras | And 3 more authors.
KDIR 2011 - Proceedings of the International Conference on Knowledge Discovery and Information Retrieval | Year: 2011

We propose an application of the Fastmap algorithm that could provide a breakthrough in the efforts to present mobile personal information to the user in context, and describe our vision for context-driven interfaces generated by this method that will support the richness of data stored in personal devices.


Sartzetakis I.,Computer Technology Institute Diophantus | Christodoulopoulos K.,Computer Technology Institute Diophantus | Christodoulopoulos K.,University of Patras | Tsekrekos C.P.,National and Kapodistrian University of Athens | And 3 more authors.
2016 Optical Fiber Communications Conference and Exhibition, OFC 2016 | Year: 2016

We develop a framework to estimate the Quality of Transmission (QoT) of unestablished lightpaths considering interference effects. Accurate estimations combined with lightpath provisioning close to current network state can yield significant savings in regenerators. © 2016 OSA.


Stefanis V.,University of Patras | Stefanis V.,Computer Technology Institute Diophantus | Plessas A.,University of Patras | Plessas A.,Computer Technology Institute Diophantus | And 3 more authors.
Proceedings of the 2012 16th Panhellenic Conference on Informatics, PCI 2012 | Year: 2012

We examine the performance of the Fast Map algorithm when applied on mobile devices for context dimensionality reduction. Our results show that this algorithm is extremely fast and is appropriate for mobile context datasets that need to be processed in real time. This fact supports our vision for context-driven interfaces generated by applying the method of mobile context dimensionality reduction that will support the richness of data stored in personal devices. © 2012 IEEE.


Koumoutsos K.,University of Patras | Koumoutsos K.,Computer Technology Institute Diophantus | Varvarigos E.A.,University of Patras | Varvarigos E.A.,Computer Technology Institute Diophantus | Nikolopoulos V.,Intelen Advanced Engineering Division
Proceedings of the 2012 16th Panhellenic Conference on Informatics, PCI 2012 | Year: 2012

Reducing CO2 emissions in order to address climate change is a difficult challenge but it may also become an opportunity for improving citizens' behaviour towards the protection of the physical environment. Furthermore, as buildings are responsible for a significant portion of total energy consumption and emissions, improving their energy performance is clearly a key factor for accomplishing the EC climate and energy objectives. In this context, the Greek pilot in GEN6, a European Commission funded project, aims to influence the behaviour of the local school communities by raising their energy awareness. As discussed herein, the pilot will provide real-time energy efficiency services over IPv6-enabled grids to the local educational community, providing students with information on their consumption patterns and raising awareness among them on the energy savings that behavioural changes may bring. Consequently, the pilot aims to reduce the participating school buildings' carbon footprint by at least 10% and prove that IPv6 may become an enabling technology for new advanced services. Currently, the installation of IPv6-enabled energy smart meters is in progress at 50+ schools for monitoring energy consumption but also for becoming an educational and social engagement tool for students. The GEN6 pilot, also aligned with the Greek School Network energy innovative programme, is further reinforced by hands-on workshops aiming at engaging students on issues of sustainability and empowering them to make further behavioural energy-saving changes. Results from the competition among the participating school communities are disseminated to the public through various means, such as a web portal, a blog, and social networks, which record the energy efficiency of participating schools and the effect of the actions taken. © 2012 IEEE.


Koumoutsos K.,University of Patras | Koumoutsos K.,Computer Technology Institute Diophantus | Kretsis A.,University of Patras | Kretsis A.,Computer Technology Institute Diophantus | And 6 more authors.
Energy, Sustainability and Society | Year: 2015

Background: Reducing energy consumption and CO2 emissions in order to address climate change requires behavioral changes by the citizens, who will have to adopt more environmentally friendly and energy-saving practices. Methods: We present a system and corresponding practices for gathering energy consumption data from public school buildings over the Internet, processing them to identify hidden correlations and produce actionable advice and presenting the results in real-time to its occupants over the Web. We describe the metering infrastructure installed at schools for energy consumption monitoring and the related actions carried out in order to motivate local school communities towards an environmentally friendly behavior. The introduction of IPv6 was found to be a key enabling technology for setting up such a system in a simple, secure, and efficient way. Results: The proposed system and processes are put under test in a pilot installation composed of about 50 IPv6-enabled schools of the Greek School Network (GSN). These are also combined with appropriate educational and social engagement tools. In this way, energy consumption, operating costs, and greenhouse effects can be reduced in the area of educational and public administration buildings in general. Thus, people become almost instantly aware of the energy and environmental implications of their actions, which motivates them towards behavioral changes and the adoption of environmentally friendly practices. Conclusions: The pilot provides a good example of collaboration between the ICT sector, the smart building and automation vendors, and the public authorities. © 2015, Koumoutsos et al.


Kretsis A.,University of Patras | Kretsis A.,Computer Technology Institute Diophantus | Kokkinos P.,University of Patras | Kokkinos P.,Computer Technology Institute Diophantus | And 4 more authors.
ACM International Conference Proceeding Series | Year: 2014

We present the results of the Greek pilot "IPv6 upgrade of Energy Efficiency in School Networks" [1], implemented in the context of the EU-sponsored project Governments ENabled with IPv6 (GEN6) [2]. The Greek pilot is part of a number of other European pilots (in Slovenia, Spain, Germany and Turkey) of the GEN6 project, which have the mission to validate and catalyze the deployment of IPv6 in the existing EU government infrastructures, services and applications. The Greek pilot, presented in this work has to do with the development, the installation and operation of an energy metering infrastructure in Greek Schools. © 2014 ACM.

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