Now showing items 1-17 of 17

  • Detecting energy-efficient central nodes for cooperative caching in wireless sensor networks 

    Dimokas, N.; Katsaros, D. (2013)
    The deployment of wireless sensor networks in many application areas like environment control, target tracking in battlefields, requires an optimization to the communication among the sensors so as to serve data in short ...
  • An enhanced memory TSK-type recurrent fuzzy network for real-time classification 

    Stavrakoudis, D. G.; Theocharis, J. B.; Petridis, V.; Giakas, G. (2015)
    An enhanced memory TSK-type recurrent fuzzy network (EM-TRFN) is proposed in this paper, suitable for modeling complex dynamic systems. Feedback connections, formulated using finite impulse response (FIR) synaptic filters, ...
  • Exploratory analysis of a terabyte scale web corpus 

    Kolias, V.; Anagnostopoulos, I.; Kayafas, E. (2014)
    In this paper we present a preliminary analysis over the largest publicly accessible web dataset: The Common Crawl Corpus. We measure nine web characteristics from two levels of granularity using MapReduce and we comment ...
  • Facebook social support: A comparative study on depression and personality characteristics 

    Giota, K. G.; Kleftaras, G. (2013)
    The explosive growth of Social Networking Sites such as Facebook had a huge impact on psychological research. One of the most controversial questions regards to whether online relationships provide meaningful social support. ...
  • InfluenceTracker: Rating the impact of a twitter account 

    Razis, G.; Anagnostopoulos, I. (2014)
    This paper describes a methodology for rating the influence of a Twitter account in this famous microblogging service. Then it is evaluated over real accounts, under the belief that influence is not only a matter of quantity ...
  • Integrated modeling of hydrological processes through openmi and web services 

    Kokkinos, K.; Loukas, A.; Samaras, N.; Iatrellis, O. (2011)
    Difficulty in linking data and models across organizations is one of the barriers to be overcome in developing integrated decision-making systems since not all models exist in the same location. OpenMI is a popular standard ...
  • Learning object farms and learning design in science education 

    Stav, J. B.; Thorseth, T. M.; Meletiou-Mavrotheris, M.; Tsalapatas, H. (2005)
    A Learning Object (LO) is a collection of digital pieces representing a minimal, independent and standalone educational unit. By combining XML and MathML technologies, together with the computing power of server based ...
  • Online assessment of sensing performance in experimental spectrum sensing platforms 

    Keranidis, S.; Passas, V.; Chounos, K.; Liu, W.; Korakis, T.; Koutsopoulos, I.; Moerman, I.; Tassiulas, L. (2014)
    Dynamic Spectrum Access aims at exploiting underutilized frequency bands towards improving wireless network performance. In this context, spectrum sensing is employed, in order to monitor spectrum occupancy and drive ...
  • Propagating users' similarity towards improving recommender systems 

    Satsiou, A.; Tassiulas, L. (2014)
    In this paper we examine an advanced collaborative filtering method that uses similarity transitivity concepts. By propagating 'similarity' between users, in a similar way as with 'trust', we can significantly expand the ...
  • Publishing diachronic life science linked data 

    Gkirtzou, K.; Vergoulis, T.; Hatzigeorgiou, A.; Sellis, T.; Dalamagas, T. (2014)
    The Linked Data paradigm involves practices to publish, share, and connect data on the Web. Thus, it is a compelling approach for the dissemination and re-use of scientific data, realizing the vision of the so-called Linked ...
  • Query expansion with a little help from twitter 

    Anagnostopoulos, I.; Razis, G.; Mylonas, P.; Anagnostopoulos, C. N. (2013)
    With the advent and rapid spread of microblogging services, web information management finds a new research topic. Although classical information retrieval methods and techniques help search engines and services to present ...
  • Semantifying twitter: The influence tracker ontology 

    Razis, G.; Anagnostopoulos, I. (2014)
    In this paper, we propose an ontology schema towards semantification provision of Twitter social analytics. The ontology is deployed over a publicly available service that measures how influential a Twitter account is, by ...
  • Social networking and on-line communities: Classification and research trends 

    Ioannidou, M.; Raptotasiou, E.; Anagnostopoulos, I. (2011)
    We investigate the birth and evolution of the on-line social networks research field as it is outlined in several recent works published within the last four years. Our goal is to present how this particular subject attracts ...
  • Social networking to support collaborative interactions in special education 

    Karagiannidis, C.; Efraimidou, S.; Koumpis, A. (2010)
    This paper proposes a framework for the collaboration of teachers in special education. The framework builds on, and extends, social networking services, in order to facilitate collaboration amongst the various categories ...
  • Socio-semantic query expansion using Twitter hashtags 

    Anagnostopoulos, I.; Kolias, V.; Mylonas, P. (2012)
    In this paper we introduce an algorithmic approach, capable of creating a semantic network with concatenated terms and phrases (hashtags) from collectively postings on the Twittersphere. This network could be exploited for ...
  • Teachers' attitudes towards the use of Web 2.0 tools in educational practice - A critical approach 

    Batsila, M.; Vavougios, D.; Tsihouridis, C.; Ioannidis, G. S. (2015)
    The main purpose of the present paper is to examine teachers' attitudes towards the use of Web 2.0 tools in their teaching practices. More specifically, it aimed to reveal the extent to which factors such as gender, type ...
  • Web page download scheduling policies for green web crawling 

    Hatzi, V.; Cambazoglu, B. B.; Koutsopoulos, I. (2014)
    A web crawler is responsible for discovering new web pages on the Web as well as for refreshing the content of already downloaded pages. During these operations, it can issue a huge number of page download requests to the ...