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Ara es mostren els items 342-361 de 403

    • QoS routing in ad-hoc networks using GA and multi-objective optimization 

      Barolli, Admir; Spaho, Evjola; Barolli, Leonard; Xhafa Xhafa, Fatos; Takizawa, Makoto (HINDAWI, 2011)
      Article
      Accés obert
      Much work has been done on routing in Ad-hoc networks, but the proposed routing solutions only deal with the best effort data traffic. Connections with Quality of Service (QoS) requirements, such as voice channels with ...

    • Real-time emotion classification using EEG data stream in e-learning contexts 

      Arijit, Nandi; Xhafa Xhafa, Fatos; Subirats, Laia; Fort, Santi (Multidisciplinary Digital Publishing Institute (MDPI), 2021-02-25)
      Article
      Accés obert
      In face-to-face and online learning, emotions and emotional intelligence have an influence and play an essential role. Learners’ emotions are crucial for e-learning system because they promote or restrain the learning. ...

    • Real-time multimodal emotion classification system in E-Learning context 

      Arijit, Nandi; Xhafa Xhafa, Fatos; Subirats Maté, Laia; Fort, Santiago (Springer, 2021)
      Text en actes de congrés
      Accés obert
      Emotions of learners are crucial and important in e-learning as they promote learning. To investigate the effects of emotions on improving and optimizing the outcomes of e-learning, machine learning models have been proposed ...

    • Recent advances on the simulation models for ad hoc networks: real traffic and mobility models 

      Doci, Arta; Barolli, Leonard; Xhafa Xhafa, Fatos (2009-03-01)
      Article
      Accés restringit per política de l'editorial
      In order to provide credible and valid simulation results it is important to built simulation models that accurately represent the environments were ad hoc networks will be deployed. Recent research results have shown that ...

    • Refinement by browsing: an alternative to thumbnails 

      Gabarró Vallès, Joaquim; Vallejo, Isabel; Xhafa Xhafa, Fatos; Stewart, Alan; Clint, Maurice (2005-03)
      Report de recerca
      Accés obert
      Thumbnails are widely used in image retrieval and browsing systems. The use of such images compacts information. However, in situations where there are a large number of images on a server site, the use of thumbnails may ...

    • Reputation-guided evolutionary scheduling algorithm for independent tasks in inter-clouds environments 

      Pop, Florin; Dobre, Ciprian M.; Cristea, Valentin; Bessis, Nik; Xhafa Xhafa, Fatos; Barolli, Leonard (2015-01-01)
      Article
      Accés obert
      Self-adaptation provides software with flexibility to different behaviours (configurations) it incorporates and the (semi-) autonomous ability to switch between these behaviours in response to changes. To empower clouds ...

    • Requirements for distributed event-based awareness in P2P groupware systems 

      Xhafa Xhafa, Fatos; Poulovassilis, Alex (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Text en actes de congrés
      Accés obert
      One of the major premises of P2P systems is to enable fully decentralized collaborative functionalities for supporting work teams and P2P communities. Within collaborative systems, tracking and awareness are vital aspects ...

    • Reusable garbled gates for new fully homomorphic encryption service 

      Wang, Xu An; Xhafa Xhafa, Fatos; Ma, Jianfeng; Cao, Yunfei; Tang, Dianhua (2017-02-06)
      Article
      Accés obert
      In this paper, we propose a novel way to provide a fully homomorphic encryption service, namely by using garbled circuits. From a high level perspective, garbled circuits and fully homomorphic encryption, both aim at ...

    • Reward-penalty weighted ensemble for emotion state classification from multi-modal data streams 

      Arijit, Nandi; Xhafa Xhafa, Fatos; Subirats Maté, Laia; Fort, Santi (World Scientific Publishing, 2022-09-21)
      Article
      Accés obert
      Researchers have shown the limitations of using the single-modal data stream for emotion classification. Multi-modal data streams are therefore deemed necessary to improve the accuracy and performance of online emotion ...

    • Routing efficiency in wireless sensor-actor networks considering semi-automated architecture 

      Barolli, Leonard; Yang, Tao; Mino, Gjergji; Xhafa Xhafa, Fatos; Durresi, Arjan (2010)
      Article
      Accés obert
      Wireless networks have become increasingly popular and advances in wireless communications and electronics have enabled the development of different kind of networks such as Mobile Ad-hoc Networks (MANETs), Wireless Sensor ...

    • Routing efficiency of AODV and DSR protocols in ad-hoc sensor networks 

      Yang, Tao; Ikeda, Makoto; De Marco, Giuseppe; Barolli, Leonard; Durresi, Arjan; Xhafa Xhafa, Fatos (Institute of Electrical and Electronics Engineers (IEEE), 2008)
      Text en actes de congrés
      Accés obert
      In this paper, we consider the performance behavior of two protocols: AODV and DSR using TwoRayGround model. We study the routing efficiency of the ad-hoc sensor network and compare the performance of two protocols for ...

    • Routing in a many-to-one communication scenario in a realistic VDTN 

      Bylykbashi, Kevin; Spaho, Evjola; Barolli, Leonard; Xhafa Xhafa, Fatos (2018)
      Article
      Accés obert
      In this paper, we evaluate and compare the performance of different routing protocols in a many-to-one communication within a Vehicular Delay Tolerant Network (VDTN). Seven groups with three stationary sensor nodes sense ...

    • Scalability, memory issues and challenges in mining large data sets 

      Kolici, Vladi; Xhafa Xhafa, Fatos; Barolli, Leonard; Lala, Algenti (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés obert
      Data mining is an active field of research and development aiming to automatically extract "knowledge" from analyzing data sets. Knowledge can be defined in different ways such as discovering (structured, frequent, ...

    • Scheduling in multiprocessor system using genetic algorithms 

      Dahal, Keshav P.; Hossain, Alamgir; Varghese, Benzy; Abraham, Ajith; Xhafa Xhafa, Fatos; Daradoumis, Thanasis (Institute of Electrical and Electronics Engineers (IEEE), 2008)
      Text en actes de congrés
      Accés obert
      Multiprocessors have emerged as a powerful computing means for running real-time applications, especially where a uniprocessor system would not be sufficient enough to execute all the tasks. The high performance and ...

    • Secure deduplication storage systems supporting keyword search 

      Li, Jin; Chen, Xiaofeng; Xhafa Xhafa, Fatos; Barolli, Leonard (2015-12-01)
      Article
      Accés obert
      Data deduplication is an attractive technology to reduce storage space for increasing vast amount of duplicated and redundant data. In a cloud storage system with data deduplication, duplicate copies of data will be ...

    • Securing a Java P2P framework: The JXTA-Overlay case 

      Arnedo Moreno, Joan; Matsuo, Keita; Barolli, Leonard; Xhafa Xhafa, Fatos (Association for Computing Machinery (ACM), 2009)
      Text en actes de congrés
      Accés obert
      In the wake of the success of Peer-to-Peer (P2P) networking, security has arisen as one of its main concerns, becoming a key issue when evaluating a P2P system. Unfortunately, some systems' design focus targeted issues ...

    • Security in online learning assessment towards an effective trustworthiness approach to support e-learning teams 

      Miguel, Jorge; Caballé Llobet, Santiago; Xhafa Xhafa, Fatos; Prieto, Josep (2014)
      Text en actes de congrés
      Accés obert
      This paper proposes a trustworthiness model for the design of secure learning assessment in on-line collaborative learning groups. Although computer supported collaborative learning has been widely adopted in many educational ...

    • Security in online web learning assessment: providing an effective trustworthiness approach to support e-learning teams 

      Miguel, Jorge; Caballé Llobet, Santiago; Xhafa Xhafa, Fatos; Prieto, Josep (2015-11-01)
      Article
      Accés obert
      This paper proposes a trustworthiness model for the design of secure learning assessment in on-line web collaborative learning groups. Although computer supported collaborative learning has been widely adopted in many ...

    • Semantic analysis of social data streams 

      Amato, Flora; Cozzolino, Giovanni; Moscato, Francesco; Xhafa Xhafa, Fatos (Springer, 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Social Networks Analysis has become a common trend among scholars and researchers worldwide. A great number of companies, institutions and organisations are interested in social networks data mining. Information published ...

    • Semantic valence modeling: emotion recognition and affective states in context-aware systems 

      Moore, Philip R.; Xhafa Xhafa, Fatos; Barolli, Leonard (2014)
      Text en actes de congrés
      Accés obert
      Defining and describing a context requires knowledge (contextual information), while research is addressing a wider range of potential contextual information in a diverse range of domains the diversity of potential contextual ...