Browsing School of Information Sciences by Title

Now showing items 33-52 of 162

  • DARP: Divide Areas Algorithm for Optimal Multi-Robot Coverage Path Planning 

    Kapoutsis, Athanasios Ch.; Chatzichristofis, Savvas A.; Kosmatopoulos, Elias B. (Springer, 2017)
    This paper deals with the path planning problem of a team of mobile robots, in order to cover an area of interest, with prior-defined obstacles. For the single robot case, also known as single robot coverage path planning ...

  • A Decentralized Voting Mechanism: Engaging ERC-20 token holders in decision-making 

    Christodoulou, Panayiotis; Christodoulou, Klitos (IEEE, 2020-07-20)
    This paper presents a Blockchain-based voting mechanism that has the potential to disrupt current voting systems and fuel the development of decentralized governance. More specifically, the paper presents a study on the ...

  • Deriving the Political Affinity of Twitter Users from Their Followers 

    Stamatelatos, Giorgos; Gyftopoulos, Sotirios; Drosatos, George; Efraimidis, Pavlos S. (IEEE, 2018)
    In this work, we show that Twitter users can reveal valuable political information about particular Nodes of Interest (NOIs) they opt to follow. More precisely, we utilize an interesting graph projection method and a series ...

  • Distributed Multi-Robot Coverage using Micro Aerial Vehicles 

    Renzaglia, A.; Doitsidis, L.; Chatzichristofis, Savvas A.; Martinelli, A.; Kosmatopoulos, E. B. (IEEE (Computer Society), 2013)
    In this paper we present a solution to the problem of positioning a team of Micro Aerial Vehicles for a surveillance task in an environment of arbitrary and unknown morphology. The problem is addressed taking into account ...

  • A distributed, plug-n-play algorithm formulti-robot applications with a priorinon-computable objective functions 

    Kapoutsis, Athanasios Ch.; Chatzichristofis, Savvas A.; Kosmatopoulos, Elias B. (Sage, 2019-05)
    This paper presents a distributed algorithm applicable to a wide range of practical multi-robot applications. In such multi-robot applications, the user-defined objectives of the mission can be cast as a general optimization ...

  • Double Mobile sinks Architecture for WSN Data Gathering and Critical Events Detection 

    Khalifeh, Ala’; Abed, Husam; Darabkh, Khalid A.; Chatzichristofis, Savvas A.; Zinonos, Zinon (IEEE, 2020-06-17)
    Data gathering and critical events detection are two essential functionalities for Wireless Sensor Network (WSN). In this paper, we propose double mobile sinks network architecture, where two mobile sink nodes visit the ...

  • DUTH at TREC 2013 Contextual Suggestion Track 

    Drosatos, George; Stamatelatos, Giorgos; Arampatzis, Avi; Efraimidis, Pavlos S. (2013)
    In this report we give an overview of our participation in the TREC 2013 Contextual Suggestion Track. We present an approach for context processing that comprises a newly designed and fine-tuned POI (Point Of Interest) ...

  • DUTH at TREC 2015 Clinical Decision Support Track 

    Drosatos, George; Roumeliotis, Stefanos; Arampatzis, Avi; Kaldoudi, Eleni (2015)
    In this report we give an overview of our participation in the TREC 2015 Clinical Decision Support Track. We present two approaches for pre-processing and indexing of the open-access PubMed articles, and four methods for ...

  • Dynamic Topology Control for WSNs in Critical Environments 

    Zinonos, Zinon; Vassiliou, Vasos; Ioannou, Christiana; Koutroullos, Marios (IEEE, 2011)
    Plant automation and control are mission-critical applications and require timely and reliable data delivery, which is difficult to provide using a wireless technology. This is especially more difficult in industrial ...

  • Dynamic two-stage image retrieval from large multimedia databases 

    Arampatzis, Avi; Zagoris, Konstantinos; Chatzichristofis, Savvas A. (Elsevier, 2013)
    Content-based image retrieval (CBIR) with global features is notoriously noisy, especially for image queries with low percentages of relevant images in a collection. Moreover, CBIR typically ranks the whole collection, ...

  • Dynamic Two-Stage Image Retrieval from Large Multimodal Databases 

    Arampatzis, Avi; Zagoris, Konstantinos; Chatzichristofis, Savvas A. (Springer-Verlag, 2011)
    Content-based image retrieval (CBIR) with global features is notoriously noisy, especially for image queries with low percentages of relevant images in a collection. Moreover, CBIR typically ranks the whole collection, ...

  • "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 ...

  • Employing Cellular Automata for Shaping Accurate Morphology Maps Using Scattered Data from Robotics’ Missions 

    Kapoutsis, Athanasios Ch.; Chatzichristofis, Savvas A.; Sirakoulis, Georgios Ch.; Doitsidis, Lefteris; Kosmatopoulos, Elias B. (Springer, 2015)
    Accurate maps are essential in the case of robot teams, so that they can operate autonomously and accomplish their tasks efficiently. In this work we present an approach which allows the generation of detailed maps, suitable ...

  • Empowering Responsible Online Gambling by Real-time Persuasive Information Systems 

    Drosatos, George; Nalbadis, Fotis; Arden-Close, Emily; Baines, Victoria; Bolat, Elvira; Vuillier, Laura; Kostoulas, Theodoros; Wasowska, Sonia; Bonello, Maris; Palles, Jane; McAlaney, John; Phalp, Keith; Ali, Raian (IEEE, 2018-05)
    Online gambling, unlike other mediums of problem-atic and addictive behaviours, such as tobacco and alcohol, offers unprecedented opportunities for building information systems that are able to monitor and understand a ...

  • 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 ...

  • Enhancing Deniability against Query-Logs 

    Arampatzis, Avi; Efraimidis, Pavlos S.; Drosatos, George (Springer, 2011)
    We propose a method for search privacy on the Internet, focusing onenhancing plausible deniability against search engine query-logs. The method ap-proximates the target search results, without submitting the intended query ...

  • 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 ...