Panagiotis Panagiotopoulos

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The large and increasing variety of proprietary hardware appliances in existing networks poses great difficulties in both their management and the launch of new network services. This is related to a plethora of requirements at the core network part such as energy costs, capital investment challenges and skills necessary to design, integrate and operate(More)
According to legislation introduced in 2009, all English local authorities were expected to implement an online petitioning facility by the end of 2010. This mandate offers a unique opportunity to assess the impact of a national eParticipation policy at such scale focusing on a particular engagement tool. A web content analysis methodology was used to(More)
OBJECTIVE To examine the use and impact of social media on 2-way communication between consumers and public organizations in the food safety and nutrition area. METHODS In-depth qualitative study conducted between October, 2012 and January, 2013, using semi-structured interviews in the United Kingdom and Ireland. Sixteen professionals worked on the public(More)
Public institutions, in their efforts to promote meaningful citizen engagement, are increasingly looking at the democratic potential of Information and Communication Technologies (ICTs). Previous studies suggest that such initiatives seem to be impeded by socio-technical integration barriers such as low sustainability, poor citizen acceptance, coordination(More)
High Level Feature Extraction runs. 1. A VITALAS.CERTH.ITI 1: Combination of early fusion and concept score fusion with feature selection. 2. A VITALAS.CERTH.ITI 2: Concept score fusion with feature selection. 3. A VITALAS.CERTH.ITI 3: Clustering within feature space and concept score fusion with feature selection. 4. A VITALAS.CERTH.ITI 4: Concept score(More)
Extensive debate on Internet and formal politics has concentrated on whether authorities should focus their efforts on high-volume activities such petitioning or crowdsourcing. Those engagement tools seem to be consistent with the ambition of many networked citizens to influence policy making through ad hoc and mostly single-issue movements. Therefore,(More)