Now showing items 1-20 of 362

  • A budget feasible mechanism for hiring doctors in e-healthcare 

    Kumar Singh, Vikash; Mukhopadhyay, Sajal; Xhafa Xhafa, Fatos; Sharma, Aniruddh (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Open Access
    Throughout the past decade, there has been an extensive research on scheduling the hospital resources such as the operation theatre(s) (OTs) and the experts (such as nurses, doctors etc.) inside the hospitals. With the ...
  • A budget feasible peer graded mechanism for iot-based crowdsourcing 

    Kumar Singh, Vikash; Mukhopadhyay, Sajal; Xhafa Xhafa, Fatos; Sharma, Aniruddh (Springer, 2019-01-23)
    Article
    Restricted access - publisher's policy
    We develop and extend a line of recent works on the design of mechanisms for heterogeneous tasks assignment problem in ’crowdsourcing’. The budgeted market we consider consists of multiple task requesters and multiple IoT ...
  • A C++ implementation of a skeleton for Tabu Search method 

    Blesa Aguilera, Maria Josep; Xhafa Xhafa, Fatos (2000-09)
    External research report
    Open Access
    We present a C++ implementation of a skeleton for Tabu Search method. Tabu Search method is a well-known meta-heuristic that has proved successful for sub-optimally solving hard combinatorial optimization problems. ...
  • A C++ Implementation of of Tabu Search for k-cardinality tree problem based on generic programming and component reuse 

    Blesa Aguilera, Maria Josep; Xhafa Xhafa, Fatos (2000-09)
    External research report
    Open Access
    We present a C++ implementation of Tabu Search method for the Minimum k-Cardinality Tree problem. Tabu Search is a well known heuristic for sub-optimally solving optimization problems. This method applies also to Minimum ...
  • A cluster head decision system for sensor networks using fuzzy logic and number of neighbor nodes 

    Anno, Junpei; Barolli, Leonard; Durresi, Arjan; Xhafa Xhafa, Fatos; Koyama, Akio (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    Conference report
    Open Access
    Cluster formation and cluster head selection are important problems in sensor network applications and can drastically affect the network’s communication energy dissipation. However, the selection of cluster head is not ...
  • A cluster head selection method for wireless sensor networks based on fuzzy logic 

    Anno, Junpei; Barolli, Leonard; Xhafa Xhafa, Fatos; Durresi, Arjan (Institute of Electrical and Electronics Engineers (IEEE), 2007)
    Conference report
    Open Access
    Sensor networks supported by recent technological advances in low power wireless communications along with silicon integration of various functionalities are emerging as a critically important computer class that enable ...
  • A collective intelligence approach for building student's trustworthiness profile in online learning 

    Miguel, Jorge; Caballé Llobet, Santiago; Xhafa Xhafa, Fatos; Prieto, Josep; Barolli, Leonard (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Open Access
    Information and communication technologies have been widely adopted in most of educational institutions to support e-Learning through different learning methodologies such as computer supported collaborative learning, which ...
  • A comparison study between two fuzzy-based trustworthiness systems for P2P networks 

    Umezaki, Kouhei; Spaho, Evjola; Barolli, Leonard; Xhafa Xhafa, Fatos; Matsuo, Keita; Iwashige, Jiro (2012)
    Conference report
    Restricted access - publisher's policy
    In P2P systems, evaluation of trustworthiness of the peers is very important for a safe communication. In order to decide the peer trustworthiness different parameters are needed. In this paper, we propose two fuzzy-based ...
  • A comparison study for two fuzzy-based systems: improving reliability and security of JXTA-overlay P2P platform 

    Liu, Yi; Sakamoto, Shinji; Matsuo, Keita; Ikeda, Makoto; Barolli, Leonard; Xhafa Xhafa, Fatos (Springer, 2016-07-01)
    Article
    Open Access
    The reliability of peers is very important for safe communication in peer-to-peer (P2P) systems. The reliability of a peer can be evaluated based on the reputation and interactions with other peers to provide different ...
  • A comparison study of different algorithms for energy-aware placement of virtual machines 

    Olvera, Alex; Xhafa Xhafa, Fatos (Springer, 2018)
    Conference report
    Restricted access - publisher's policy
    Cloud Computing services are essential to modern society. The increasing number of people and organisations using these types of services results in a higher demand in datacenters, which in turn, is raising energy consumption ...
  • A comparison study of two fuzzy-based handover systems for avoiding ping-pong effect in Wireless Cellular Networks 

    Mino, Gjergji; Barolli, Leonard; Durresi, Arjan; Xhafa Xhafa, Fatos; Koyama, Akio (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    Conference report
    Open Access
    Wireless mobile networks and devices are becoming increasingly popular to provide users the access anytime and anywhere. The mobile systems are based on cellular approach and the area is covered by cells that overlap each ...
  • A comparison study on meta-heuristics for ground station scheduling problem 

    Xhafa Xhafa, Fatos; Herrero, Xavier; Barolli, Admir; Takizawa, Makoto (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Open Access
    In ground station scheduling problem the aim is to compute an optimal planning of communications between Spacecrafts (SCs) and operations teams of Ground Stations (GSs). While such allocation of tasks to ground stations ...
  • A data visualization approach for trustworthiness in social networks for on-line learning 

    Miguel, Jorge; Caballé Llobet, Santiago; Xhafa Xhafa, Fatos; Snasel, Vaclav (2015)
    Conference report
    Open Access
    Up to now, the problem of ensuring collaborative activities in e-Learning against dishonest students' behaviour has been mainly tackled with technological security solutions. Over the last years, technological security ...
  • Ad hoc and neighborhood search methods for placement of mesh routers in Wireless Mesh Networks 

    Xhafa Xhafa, Fatos; Sánchez Lopez, Christian; Barolli, Leonard (2009)
    Conference report
    Open Access
    With the fast development in wireless technologies and wireless devices, Wireless Mesh Networks (WMN) are becoming and important networking infrastructure, especially due to their low cost of deployment and maintenance. A ...
  • A distributed hybrid index for processing continuous range queries over moving objects 

    Yu, Ziqiang; Xhafa Xhafa, Fatos; Chen, Yuehui; Ma, Kun (Springer, 2019-05)
    Article
    Open Access
    Central to many location-based services is the problem of processing concurrent continuous range queries over a large scale of moving objects. Most relevant works to this problem mainly investigate the centralized search ...
  • A distributed QoS Routing and CAC framework: performance evaluation of its SSRA and InterD Agents 

    Barolli, Leonard; Ikeda, Makoto; Durresi, Arjan; Xhafa Xhafa, Fatos; Koyama, Akio (Institute of Electrical and Electronics Engineers (IEEE), 2007)
    Conference report
    Open Access
    In order to support multimedia communication, it is necessary to develop routing algorithms which use for routing more than one QoS parameters. This is because new services such as video on demand and remote meeting systems ...
  • A fuzzy-based approach for classifying students' emotional states in online collaborative work 

    Arguedas, Marta; Casillas, Luis; Xhafa Xhafa, Fatos; Daradoumis, Thanasis; Peña, Adriana; Caballé Llobet, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Open Access
    Emotion awareness is becoming a key aspect in collaborative work at academia, enterprises and organizations that use collaborative group work in their activity. Due to pervasiveness of ICT's, most of collaboration can be ...
  • A fuzzy-based CAC scheme for wireless cellular networks considering different priorities 

    Ikebata, Taku; Mino, Gjergji; Barolli, Leonard; Koyama, Akio; Durresi, Arjan; Xhafa Xhafa, Fatos (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    Conference report
    Open Access
    The mobile cellular systems are expected to support multiple services with guaranteed Quality of Service(QoS). But, the ability of wireless systems to accommodate expected growth of traffic load and broadband services is ...
  • A fuzzy based call admission control scheme for wireless cellular networks considering priority of on-going connections 

    Mino, Gjergji; Barolli, Leonard; Durresi, Arjan; Xhafa Xhafa, Fatos; Koyama, Akio (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    Conference report
    Open Access
    The mobile cellular systems are expected to support multiple services with guaranteed Quality of Service (QoS).But, the ability of wireless systems to accommodate expected growth of traffic load and broadband services is ...
  • A fuzzy-based call admission control system for wireless cellular networks 

    Barolli, Leonard; Xhafa Xhafa, Fatos; Durresi, Arjan; Koyama, Akio (Institute of Electrical and Electronics Engineers (IEEE), 2007)
    Conference report
    Open Access
    The mobile cellular systems are expected to support multiple services with guaranteed quality of service (QoS). However, the ability of wireless systems to accommodate expected growth of traffic load and broadband services ...