Seo Gu, South Korea
Seo Gu, South Korea

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Chang H.,Hannam University | Kang Y.,R2soft Co. | Ahn H.,Hannam University | Jang C.,Hannam University | Choi E.,Hannam University
Energy Procedia | Year: 2011

There happen a variety of disasters in the world such as a Nuclear exposed from a nuclear power-station due to earthquake and Tsunami in Japan, a tornado in Alabama in the US, a volcano explosion in Puyehue in Chile, an earthquake in Sichuan in China, and so on. Disasters can happen anytime anywhere without notification and they could have different ripple effects on society and could be very serious as well. A disaster alerts system in IT-based society should effectively react against disasters happened. Therefore, we in this paper proposed a context-aware mobile platform for intellectual disaster alerts system that transmits disaster information through mobile devices. © 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of International Materials Science Society.


Changbok,Hannam University | Chang H.,Hannam University | Kang Y.,R2soft Co. | Bae Y.,Hannam University | And 2 more authors.
Energy Procedia | Year: 2011

Mobile Cloud Computing has become as a new IT paradigm because of the growth of mobile device like smartphone and appearance of Cloud Computing environment. This mobile cloud environment provides various services and IT resources according to users' requests, so an effective providing of service and IT resources is required. Hence, this paper filtering approach based on resource usage frequency in mobile cloud computing in order to provide distributed IT resources and services to users based on context-awareness information. We also apply the context of usage location and time to it for improving recommendation. © 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of International Materials Science Society.


Chang H.,Hannam University | Ahn H.,Hannam University | Kang Y.,R2Soft Co. | Choi E.,Hannam University
Proceedings - 6th International Conference on Computer Sciences and Convergence Information Technology, ICCIT 2011 | Year: 2011

Recently Mobile Cloud Computing has become a new IT paradigm due to appearance of Cloud Computing environment and the growth of mobile devices such as smartphone, Tablet PC, and PDA. This mobile cloud environment provides various services and IT resources according to users' requests, so an effective supply of service and IT resources is required. Hence, this paper proposed an intelligent filtering approach for improvement of service accuracy based on resource usage frequency and context-awareness information in mobile cloud computing in order to provide distributed IT resources and services for users. © 2011 AICIT.


Keum K.,R2soft co. | Nam S.,Seoul National University | Kang Y.,R2soft co. | Kwon O.,Chungnam National University
Cluster Computing | Year: 2015

Recently, the growth of social network service (SNS, Facebook) has required the search technique to utilize its distinctive characteristic which links people to people. This paper discusses the design and implementation of GRAPPE which suggests the ranked list of optimal connecting routes between two people by interaction like SNS, phone calls, texts, mails. It is based on mutual intimacy index (MII) which indicate how closely two people are related. MII is calculated periodically when a user interact with other person by smartphone. In this study, we propose a simple two-ended search method for finding optimal routes between a source person and a destination person. For the real-time service it searches optimal path within 3 step-away relationship in human network that is effective in real life while existing services in SNS usually provide one-ended search on entire paths. Furthermore, we also use the pruning technique for efficient execution time. © 2015, Springer Science+Business Media New York.


Kang Y.,R2soft Co. | Keum K.,R2soft Co. | Jang C.,R2soft Co. | Kim J.,Pusan National University
International Journal of Information and Computer Security | Year: 2014

Nowadays, many government agency and corporation to build smartwork environment is increasing for effective conduction of business work. So, cases which introduce the mobile office application which can be operated on mobile devices are also on the rise in that you can easily build smartwork environment without much cost. But today's mobile security solution is simply to detect malicious code or stay on the level of mobile device management. In this paper, currently provided security technology is researched, mobile virtualisation technology as security technology suitable for smartwork environment is investigated among the current security technologies. Necessary component technologies for mobile virtualisation-based security technology for smartwork environment are also researched. Copyright © 2014 Inderscience Enterprises Ltd.

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