Browsing Articles by Title

Now showing items 17-36 of 69

  • "Educational Robotics: Platforms, Competitions and Expected Learning Outcomes" 

    Evripidou, S.; Georgiou, K.; Doitsidis, L.; Amanatiadis, A. A.; Zinonos, Zinon; Chatzichristofis, Savvas A. (IEEE, 2020-12-04)
    Motivated by the recent explosion of interest around Educational Robotics (ER), this paper attempts to re-approach this area by suggesting new ways of thinking and exploring the related concepts. The contribution of the ...

  • An efficient privacy-preserving solution for finding the nearest doctor 

    Drosatos, George; Efraimidis, Pavlos S. (Personal and Ubiquitous Computing volume, 2012-10-30)
    In this work, we define the Nearest Doctor Problem for finding the nearest doctor in case of an emergency and present a privacy-preserving protocol for solving it. The solution is based on cryptographic primitives and makes ...

  • Enabling Responsible Online Gambling by Real-time Persuasive Technologies 

    Drosatos, George; Nalbadis, Fotis; Arden-Close, Emily; Baines, Victoria; Bolat, Elvira; Vuillier, Laura; Kostoulas, Theodoros; Budka, Marcin; Wasowska, Sonia; Bonello, Maris; Brown, Jamie; Corner, Tessa; McAlaney, John; Phalp, Keith; Ali, Raian (RTU Press, 2019-01)
    Online gambling, unlike other offline addiction forms, provides unprecedented opportunities for monitoring users’ behaviour in real-time, along with the ability to adapt persuasive interactions and messages that would match ...

  • Estimating the Joint Tail Risk Under the Filtered Historical Simulation. An Application to the CCP's Default and Waterfall Fund 

    Barone-Adesi, Giovanni; Giannopoulos, Kostas; Les, Vosper (Geneva :Swiss Finance Institute, 2015)
    To ensure that central counterparties (“CCPs”) are safe in all market conditions the European Union (EU) has adopted legislation, commonly known as the European Market Infrastructure Regulation (“EMIR”) that deal with their ...

  • Euroscepticism and Nationalist Populism 

    Klapsis, Antonis; Kakolyris, Panagiotis (Wilfried Martens Centre for European Studies, 2017)
    In recent years Eurosceptic parties have gained significant ground in national and European Parliament elections in many EU countries. This trend is related to the effects of the ongoing economic crisis, which has drastically ...

  • An Experimental Analysis of the Mobile IPv6 Handover Latency Components 

    Vassiliou, Vasos; Zinonos, Zinon (2009)
    This paper examines the handover process of Mobile IPv6 in a real wireless testbed, based on IEEE 802.11b and extracts information on the actions taken by network entities during the movement of a mobile node. This work ...

  • Fast and Efficient TSC-Checkers for m-out-of (2m ± 1) codes 

    Gaitanis, Constantin; Gaitanis, N.; Sigala, M. (IEEE, 1983-06)
    This note is concerned with the design of fast totally self-checking checkers for m-out-of-(2m ± 1) codes. The new method uses only three levels of gates, and is based on the partitioning of the input lines into m blocks ...

  • Fast Retrieval from Image Databases via Binary Haar Wavelet Transform on the Color and Edge Directivity Descriptor 

    Chatzichristofis, Savvas A.; Boutalis, Yiannis S.; Arampatzis, Avi (IARIA, 2011)
    In this paper, we are evaluating several accelerating techniques for content-based image retrieval, suitable for the Color and Edge Directivity Descriptor (CEDD). To date, the experimental results presented in the ...

  • Fuzzy Logic Control for Mobility Support in Industrial Wireless Sensor Networks 

    Zinonos, Zinon; Chrysostomou, Chrysostomos; Vassiliou, Vasos (Springer, 2014)
    Mobility management is a crucial problem for wireless mobile communication, especially in wireless sensor networks (WSN). In this chapter, we show the need of providing an intelligent mobility controller, applicable to any ...

  • The GINSENG System for Wireless Monitoring and Control: Design and Deployment Experiences 

    O'donovan, Tony; Brown, James; Büsching, Felix; Cardoso, Alberto; Cecílio, José; Do Ó, Jose; Furtado, Pedro; Gil, Paulo; Jugel, Anja; Pöttner, Wolf-Bastian; Roedig, Utz; Sá Silva, Jorge; Silva, Ricardo; Sreenan, Cormac J.; Vassiliou, Vasos; Voigt, Thiemo; Wolf, Lars; Zinonos, Zinon (ACM, 2013)
    Today’s industrial facilities, such as oil refineries, chemical plants, and factories, rely on wired sensor systems to monitor and control the production processes. The deployment and maintenance of such cabled systems is ...

  • Handoff Triggering for Wireless Sensor Networks with Performance Needs 

    Zinonos, Zinon; Vassiliou, Vasos; Chrysostomou, Chrysostomos (IEEE, 2013)
    In this paper, we deal with mobility management for wireless sensor networks and we focus on the first phase of a handoff procedure which is concerned with the mechanics of measuring important parameters and initiating ...

  • Historical research in archives: user methodology and supporting tools 

    Torou, Elena; Katifori, Akrivi; Vassilakis, Costas (Springer, 2011)
    Historic research involves finding, using, and correlating information within primary and secondary sources, in order to communicate an understanding of past events. In this process, historians employ their scientific ...

  • How Smart Are Smartphones?: Bridging the marketing and information technology gap. 

    Amanatiadis, Angelos; Chatzichristofis, Savvas A. (IEEE, 2014)
    The term "smart" has become widespread in consumer electronics in recent years, reflecting the consumers' need for devices that assist them in their daily activities. The term has a long history of usage in marketing science ...

  • Hybrid Cellular Ants for Clustering Problems 

    Bitsakidis, Nikolaos P.; Chatzichristofis, Savvas A.; Sirakoulis, Georgios Ch. (Old City Publishing, 2014)
    In the last decade the amount of the stored data related to almost all areas of life has rapidly increased. However, the overall process of discovering knowledge from data demands more powerful clustering techniques to ...

  • Image classification by addition of spatial information based on histograms of orthogonal vectors 

    Zafar, Bushra; Ashraf, Rehan; Ali, Nouman; Ahmed, Mudassar; Jabbar, Sohail; Chatzichristofis, Savvas A. (PLOS ONE, 2018-06-08)
    The Bag-of-Visual-Words (BoVW) model is widely used for image classification, object recognition and image retrieval problems. In BoVW model, the local features are quantized and 2-D image space is represented in the form ...

  • Image Encryption using the Recursive Attributes of the eXclusive-OR Filter 

    Chatzichristofis, Savvas A.; Marques, Oge; Lux, Mathias; Boutalis, Yiannis (Springer, 2014)
    This paper describes a visual multimedia content encryption approach based on cellular automata (CA), expanding the work proposed in [4]. The presented algorithm relies on an attribute of the eXclusive-OR (XOR) filter, ...

  • Image Moment Invariants as Local Features for Content Based Image Retrieval using the Bag-of-Visual-Words Model 

    Karakasis, Evangelos G.; Amanatiadis, Angelos; Gasteratos, Antonios; Chatzichristofis, Savvas A. (Elsevier, 2015)
    This paper presents an image retrieval framework that uses affine image moment invariants as descriptors of local image areas. Detailed feature vectors are generated by feeding the produced moments into a Bag-of-Visual-Words ...

  • Integrated visualisation of wearable sensor data and risk models for individualised health monitoring and risk assessment to promote patient empowerment 

    Zhao, Youbing; Parvinzamir, Farzad; Wilson, Stephen; Wei, Hui; Deng, Zhikun; Portokallidis, Nick; Third, Allan; Drosatos, George; Liu, Enjie; Dong, Feng; Marozas, Vaidotas; Lukosevicius, Arunas; Kaldoudi, Eleni; Clapworthy, Gordon (Springer Link, 2017-05)
    Patient empowerment delivers health and social care services that enable people to gain more control of their healthcare needs. With the advancement of sensor technologies, it is increasingly possible to monitor people’s ...

  • Investigating the Behavior of Compact Composite Descriptors in Early Fusion, Late Fusion and Distributed Image Retrieval 

    Chatzichristofis, Savvas A.; Arampatzis, Avi; Boutalis, Yiannis S. (2010)
    In Content-Based Image Retrieval (CBIR) systems, the visual content of the images is mapped into a new space named the feature space. The features that are chosen must be discriminative and sufficient for the description ...

  • Known Unknowns in an Era of Technological and ViralDisruptions—Implications for Theory,Policy, and Practice 

    Carayannis, Elias G.; Christodoulou, Klitos; Christodoulou, Panayiotis; Chatzichristofis, Savvas A.; Zinonos, Zinon (Springer Verlag, 2021-02-10)
    Technology is composed of the words “Techne” and “Logos” that refer to the artistic/ creative and the logical/scientific aspects of its dualism. And so inherent this Promethean concept lie the concepts of the Schumpeterian ...