Changwoo Yoon

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In recent years, Cloud computing is gaining much popularity as it can efficiently utilize the computing resources and hence can contribute to the issue of Green IT to save energy. So to make the Cloud services commercialized, Cloud markets are necessary and are being developed. As the increasing numbers of various Cloud services are rapidly evolving in the(More)
Keywords: Mobile IPTV WiMAX Fountain code Channel zapping time Processing complexity Resource usage Decoding failure rate Quality of experience Genetic algorithm a b s t r a c t In this paper, we present a novel fountain code-based mobile IPTV multicast system architecture over WiMAX network. In the proposed system, the transmission algorithm at a base(More)
Coupled schemes between service-oriented architecture (SOA) and Web 2.0 have recently been researched. Web-based content providers and telecommunications company (Tele-com) based Internet protocol television (IPTV) providers have struggled against each other to accommodate more three-screen service subscribers. (SNS) independently.
—— IPTV brought a new digital era in the broadcasting domain. The main change of digital broadcasting is an advent of a bi-directional interactive service feature. Using that bi-directionality, IPTV provides various kinds of convergence service such as information providing, advertisement, and e-commerce. But the number of services required to be developed(More)
— Service Delivery Platform (SDP) is an enterprise application implementing Service Oriented Architecture (SOA) concepts. SOA is a component model relating services by a contract between services through well defined interface. The SDP, that is a commercial system of SOA concepts, has two main components: Common BUS delivering and routing web services and(More)
1 Information is a meaningful collection of data. Information retrieval (IR) is an important tool for changing data to information. Of the three classical IR models (Boolean, Support Vector Machine, and Probabilistic), the Support Vector Machine (SVM) IR model is most widely used. But this model does not convey enough relevancies between a query and(More)
To my wife Jaesook, my daughter Jenny, my son Juhyung, and my families, in God with love ACKNOWLEDGMENTS I would like to thank my parents for their support. They have provided unconditional love and support. I greatly thank to all my relatives for their lovely concerns and prayer. I would also like to thank to William H. Donnelly for his support and beloved(More)