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)
In this paper, we propose a promising multi-objective (MO) optimization model for partner selection in a market-oriented dynamic collaboration (DC) platform of Cloud providers (CPs) to minimize the conflicts among providers that may happen when negotiating among providers. The model not only uses their individual information (INI) but also past(More)
Coupled schemes between service-oriented architecture (SOA) and Web 2.0 have recently been researched. Web-based content providers and telecommunications company (Telecom) based Internet protocol television (IPTV) providers have struggled against each other to accommodate more three-screen service subscribers. Since the advent of Web 2.0, more abundant(More)
1047-3203/$ see front matter 2011 Elsevier Inc. A doi:10.1016/j.jvcir.2011.09.003 ⇑ Corresponding author. Fax: +82 54 279 2299. E-mail address: hwangjun@postech.ac.kr (H. Song 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)
of Dissertation Presented to the Graduate School of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy DOMAIN-SPECIFIC KNOWLEDGE-BASED INFORMATION RETRIEVAL MODEL USING KNOWLEDGE REDUCTION By Changwoo Yoon August 2005 Chair: Douglas D. Dankel II Major Department: Computer and Information Science and(More)
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 documents(More)
Stability in the nowadays distribution power system is endangered by interaction problems that may arise from newly added power-electronics based power devices. Recently, a new concept to deal with this higher frequency instability, the active damper, has been proposed. The active damper is a power electronics based power device, which provides an(More)
Today more and more companies rely on thin client computer infrastructure to save costs and simplify the system and software administration process. However, in many cases being able to move the computational power to the server is not easy. Because users often need to use their mass storage devices, picture device, printers, scanners and other USB(More)