Joong-Kyung Ryu

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Sang-Yeob Oh, Supratip Ghose, Kyungyong Chung, Joong-Kyung Ryu and Jung-Soo Hane,∗ aDepartment of Interactive Media, Gachon University, Seongnam, Korea bDepartment of Computer Science and Engineering, University of Information Technology and Sciences, Dhaka, Bangladesh cDepartment of Computer Information Engineering, Sangji University, Wonju, Korea(More)
High performance systems and distributed environment usually deployed to improve users’ performance and availability. Recent years, High performance systems and distributed environment suffer from security issues and certain vulnerabilities became the sweetest targets to attackers. Some attacks easily and widely transmit other systems, and lead to(More)
Convergence-based service environments are embedded in large-capacity servers and adopt client/server models. Applications, devices, networks, and infrastructure are converging and creating an immense amount of content, which poses complex challenges for organizations, developers and users. In the field of security, we are seeing the convergence of(More)
The existing music search and recommendation systems obtain results through query or answer and recommend music using data mining techniques. However, it is not possible to provide active services that satisfy customers in smart home environments because these systems consider only static information in Web environments. In order to solve these problems,(More)
One of the personalized service in the ubiquitous For establishing real u-health environments, it is necessary to receive the context information obtained from various platforms at proper time in portable devices, which are operated in both wire and wireless communication. And, a knowledge model that reflects the information and characteristics for such(More)
An item recommendation service provides an item list by considering the circumstance and desire of users without any limitations in time and location. However, the recommendation systems used in the past are unable to satisfy user desires because these systems only reply to the results of consider static information. This paper attempts to design a(More)
With the increasing number of chronic disease patients, the importance of everyday health care has grown more significant. The study researchers expected it would help for patients' health improvement and healthcare service expansion if users check their vital signs in their daily lives and send the results to a medical center's servers through a specific(More)