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Detecting intrusions at host level is vital to protecting shared resources in grid, but traditional host-based intrusion detecting system (HIDS) is not suitable for grid environment. Grid-specific attacks are different from traditional ones, and traditional HIDS can not recognize a grid user and always with high performance overhead. This paper proposes a(More)
Massive online open courses' (MOOCs') students who use discussion forums have higher chances of finishing the course. However, little research has been conducted for understanding the underlying factors. One of the reasons which hinders the analysis is the amount of manual work required for annotating posts. In this paper we use machine learning techniques(More)
As the size of the server cluster increases, management of clusters has been a daunting task. Traditional management architecture of cluster system fails in providing efficient management as the scale of a cluster increases. In this paper, a novel management architecture of a large-scale cluster system, called cooperation-oriented hierarchical autonomic(More)
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