Hee-seong Kim

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Improving the lifetime of wireless sensor networks (WSNs) remains an open and active research area. One of the challenging problems in this field is the partitioning of a WSN into disjoint clusters so that the network lifetime is maximized. In particular, the selection of a head for each cluster should consider various parameters related to transmission(More)
Context-awareness service is one of the key features in ubiquitous computing system. In heterogeneous pervasive computing environment, effective context modeling and reasoning are important to enable the collaboration and distributed reasoning among the agents. The effectiveness of the previous approaches for distributed reasoning significantly degrades(More)
Nowadays, handover is a critical issue for real-time applications in wireless networks. In this paper we propose more efficient handover solution with reducing the number of handover packet for the mobile station (MS) in handover process to scan. It is based on a concept of BSs channel information with a group-based scan technique. The base stations (BSs)(More)
Multithreading is an efficient technique commonly used to maximize the performance of CPU. One of the most important challenges in multithreading is thread pool management. It needs to retain a proper number of threads in the pool, which minimizes the response time and maximizes the resource utilization. To achieve this goal, this paper proposes a novel(More)
Clusters of homogeneous workstations built around fast networks have become popular means of solving scientific problems, and users often have access to several such clusters. Harnessing the collective power of these clusters to solve a single, challenging problem is desirable, but is often impeded by large inter-cluster network latencies and heterogeneity(More)
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