Ara es mostren els items 136-155 de 155

    • 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 ...
    • 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 ...
    • 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, ...
    • 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 ...
    • 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 ...
    • Stimulation effects of SmartBox for e-learning using JXTA-overlay P2P system 

      Matsuo, Keita; Barolli, Leonard; Kolici, Vladi; Xhafa Xhafa, Fatos; Koyama, Akio; Durresi, Arjan (Institute of Electrical and Electronics Engineers (IEEE), 2009)
      Text en actes de congrés
      Accés obert
      This work is motivated by the need to develop decentralized P2P approaches to support learning and teaching activity in virtual universities.In this paper, we present the stimulation effects of the SmartBox for e-learning ...
    • Tools for performance assessment of OLSR protocol 

      Ikeda, Makoto; Barolli, Leonard; De Marco, Giuseppe; Yang, Tao; Durresi, Arjan; Xhafa Xhafa, Fatos (HINDAWI, 2009-05-28)
      Article
      Accés obert
      In this paper, we evaluate the performance of Optimized Link State Routing (OLSR) protocol by experimental and simulation results. The experiments are carried out by using our implemented testbed and the simulations by ...
    • Towards a normalized trustworthiness approach to enhance security in on-line assessment 

      Miguel, Jorge; Caballé Llobet, Santiago; Xhafa Xhafa, Fatos; Prieto, Josep; Barolli, Leonard (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés obert
      This paper proposes an approach to enhance information security in on-line assessment based on a normalized trustworthiness model. Among collaborative e-Learning drawbacks which are not completely solved, we have investigated ...
    • Trustworthiness in P2P: performance behaviour of two fuzzy-based systems for JXTA-overlay platform 

      Spaho, Evjola; Sakamoto, Shinji; Barolli, Leonard; Xhafa Xhafa, Fatos; Ikeda, Makoto (Springer, 2014-09-01)
      Article
      Accés restringit per política de l'editorial
      Peer-to-peer (P2P) networks, will be very important for future distributed systems and applications. In such networks, peers are heterogeneous in providing the services and they do not have the same competence of reliability. ...
    • Tuning of operators in memetic algorithms for independent batch scheduling in computational grids 

      Xhafa Xhafa, Fatos; Duran, B.; Barolli, Leonard; Kolici, Vladi; Miho, Rozeta; Takizawa, Makoto (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Efficient scheduling of jobs to resources is a core service of Computational Grids (CGs). Due to the large scale, the dynamic nature and the highly heterogeneous tasks and resources, scheduling is a challenging problem in ...
    • Tuning operators of genetic algorithms for mesh routers placement problem in Wireless Mesh Networks 

      Xhafa Xhafa, Fatos; Sánchez, Christian; Barolli, Admir; Miho, Rozeta; Barolli, Leonard; Takizawa, Makoto (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Text en actes de congrés
      Accés obert
      Wireless Mesh Networks (WMNs) have become an important networking infrastructure for providing cost-efficient broadband wireless connectivity. WMNs are showing their applicability in deployment of medical, transport and ...
    • Using a grid platform for enabling real time user modeling in on-line campus 

      Caballé Llobet, Santiago; Xhafa Xhafa, Fatos; Daradoumis, Thanasis; Esteve, Joana; Barolli, Leonard; Durresi, Arjan (Institute of Electrical and Electronics Engineers (IEEE), 2007)
      Text en actes de congrés
      Accés obert
      User modelling in on-line distance learning is an important research field focusing on two important aspects: describing and predicting students' actions and intentions as well as adapting the learning process to students' ...
    • Using bi-clustering algorithm for analyzing online users activity in a virtual campus 

      Xhafa Xhafa, Fatos; Caballé Llobet, Santiago; Barolli, Leonard; Molina, Albert; Miho, Rozeta (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Text en actes de congrés
      Accés obert
      Data mining algorithms have been proved to be useful for the processing of large data sets in order to extract relevant information and knowledge. Such algorithms are also important for analyzing data collected from the ...
    • Using data replication for improving QoS in MANETS 

      Kulla, Elis; Spaho, Evjola; Xhafa Xhafa, Fatos; Barolli, Leonard; Takizawa, Makoto (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
    • Using mobile devices to support online collaborative learning 

      Caballé Llobet, Santiago; Xhafa Xhafa, Fatos; Barolli, Leonard (Hindawi, 2010)
      Article
      Accés obert
      Mobile collaborative learning is considered the next step of on-line collaborative learning by incorporating mobility as a key and breakthrough requirement. Indeed, the current wide spread of mobile devices and wireless ...
    • WMN-SA system for node placement in WMNs: evaluation for different realistic distributions of mesh clients 

      Sakamoto, Shinji; Oda, Tetsuya; Bravo, Albert; Barolli, Leonard; Ikeda, Makoto; Xhafa Xhafa, Fatos (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      One of the key advantages of Wireless Mesh Networks (WMNs) is their importance for providing cost-efficient broadband connectivity. There are issues for achieving the network connectivity and user coverage, which are related ...