22 Result(s)
within
Conference Paper
Fatos Xhafa
Computer Science
English
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Chapter and Conference Paper
Secure and Task Abortion Aware GA-Based Hybrid Metaheuristics for Grid Scheduling
In traditional distributed computing the users and owners of the computational resources usually belong to the same administrative domain. Therefore security and reliability of the resources are not concerned ...
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Chapter and Conference Paper
A GA(TS) Hybrid Algorithm for Scheduling in Computational Grids
The hybridization of heuristics methods aims at exploring the synergies among stand alone heuristics in order to achieve better results for the optimization problem under study. In this paper we present a hybr...
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Chapter and Conference Paper
A Compendium of Heuristic Methods for Scheduling in Computational Grids
Scheduling in large scale distributed computing environments such as Computational Grids, is currently receiving a considerable attention of researchers. Despite that scheduling in such systems has much in com...
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Chapter and Conference Paper
Towards an Intelligent Environment for Programming Multi-core Computing Systems
In this position paper we argue that an intelligent program development environment that proactively supports the user helps a mainstream programmer to overcome the difficulties of programming multi-core compu...
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Chapter and Conference Paper
A Fuzzy-Based Handover System for Wireless Cellular Networks: A Case Study for Handover Enforcement
Presently, the 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...
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Chapter and Conference Paper
Performance Evaluation of Two Search Space Reduction Methods for a Distributed Network Architecture
In our previous work, we proposed a distributed network architecture which integrates routing and CAC strategies using cooperative agents. However, in the previous research, we did not evaluated the performanc...
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Chapter and Conference Paper
Supporting Effective Monitoring and Knowledge Building in Online Collaborative Learning Systems
This paper aims to report on an experience of using an innovative groupware tool to support real, collaborative learning. We base the success of on-line collaborative learning on extracting relevant knowledge ...
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Chapter and Conference Paper
A Fuzzy-Based Speed-Aware Handoff System for Wireless Cellular Networks
Presently, the 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...
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Chapter and Conference Paper
Enabling Efficient Real Time User Modeling in On-Line Campus
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...
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Chapter and Conference Paper
Improvement of JXTA Protocols for Supporting Reliable Distributed Applications in P2P Systems
In any distributed application, the communication between the distributed processes/nodes of the distributed systems is essential for both reliability and efficiency matters. In this work we address this issue...
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Chapter and Conference Paper
A Service-Oriented Platform for the Enhancement and Effectiveness of the Collaborative Learning Process in Distributed Environments
Modern on-line collaborative learning environments are to enable and scale the involvement of an increasing large number of single/group participants who can geographically be distributed, and who need to tran...
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Chapter and Conference Paper
Efficient Embedding of Information and Knowledge into CSCL Applications
This study aims to explore two crucial aspects of collaborative work and learning: the importance of enabling CSCL applications, on the one hand, to capture and structure the information generated by group act...
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Chapter and Conference Paper
A Grid-Aware Implementation for Providing Effective Feedback to On-Line Learning Groups
Constantly providing feedback to on-line learning teams is a challenging yet one of the latest and most attractive issues to influence learning experience in a positive manner. The possibility to enhance learn...
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Chapter and Conference Paper
Analyzing the Organization of Collaborative Math Problem-Solving in Online Chats Using Statistics and Conversation Analysis
In this paper we describe how a statistical test on a hypothesis regarding collaborative math problem solving using online chats showed an unexpected result, whose understanding required the use of qualitative...
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Chapter and Conference Paper
Using Parallelism in Experimenting and Fine Tuning of Parameters for Metaheuristics
We show that parallel implementations of metaheuristics are efficient tools for both experimenting and fine tuning of parameters.
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Chapter and Conference Paper
An Integrated Approach for Analysing and Assessing the Performance of Virtual Learning Groups
Collaborative distance learning involves a variety of elements and factors that have to be considered and measured in order to analyse and assess group and individual performance more effectively and objective...
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Chapter and Conference Paper
A Grid-Based Approach for Processing Group Activity Log Files
The information collected regarding group activity in a collaborative learning environment requires classifying, structuring and processing. The aim is to process this information in order to extract, reveal a...
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Chapter and Conference Paper
Exploring Interaction Behaviour and Performance of Online Collaborative Learning Teams
Studying and analysing the collaborative behaviour of online learning teams and how this behaviour is related and affects task performance is a complex process. This paper presents an integrated approach that ...
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Chapter and Conference Paper
Parallel Skeletons for Tabu Search Method Based on Search Strategies and Neighborhood Partition
In this paper we present two parallel skeletons for Tabu Search method -a meta-heuristic for solving combinatorial optimization problems. Our parallel skeletons are designed and implemented from the generic pa...
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Chapter and Conference Paper
The (parallel) approximability of non-boolean satisfiability problems and restricted integer programming
We present parallel approximation algorithms for maximization problems expressible by integer linear programs of a restricted syntactic form introduced by Barland et al. [BKT96]. One of our motivations was to ...
