Identifying the social-balanced densest subgraph from signed social networks

Title : Identifying the social-balanced densest subgraph from signed social networks
Journal : The Journal of Supercomputin
Authors : Fei Hao, Doo-Soon Park, Zheng Pei, HwaMin Lee, Young-Sik Jeong
Corresponding author : Doo-Soon Park
DOI : https://doi.org/10.1007/s11227-015-1606-6

Abstract
Identifying the dense subgraphs from large graphs is important and useful to various social media mining applications. Most of existing works focus on the densest subgraph problem in the unweighted and undirected represented social network which can maximize the average degree over all possible subgraphs. However, considering the frequent signed relationships occurred in real-life social network, this paper introduces the social-balanced densest subgraph problem in signed social network by incorporating the social balance theory. We obtain a novel problem formulation that is to identify the subset of vertices that can maximize the social-balanced density in signed social networks. Further, we propose an efficient approach for identifying the social-balanced densest subgraph based on formal concept analysis. The case study illustrates that our algorithm can efficiently identify the social-balanced densest subgraph for satisfying the specific application’s requirements.

Acknowledgments
This research was supported by the MSIP (Ministry of Science, ICT and Future Planning), Korea, under the C-ITRC (Convergence Information Technology Research Center) (IITP-2015-IITP-2015-H8601-15-1009) supervised by the IITP (Institute for Information and communications Technology Promotion) and was partly supported by the Natural Science Foundation for Young Scientists of Shanxi Province, China (Grant No. 2015021102) and Z. Pei’s work is partially supported by National Nature Science Foundation of China (Grant No. 61372187).

Proxy Based Seamless Connection Management Scheme for Smart Transportation Service

Title : Proxy Based Seamless Connection Management Scheme for Smart Transportation Service
Journal : Wireless Personal Communications
Authors : HwaMin Lee, Daeyong Jung, DaeWon Lee
Corresponding author : DaeWon Lee
DOI : https://doi.org/10.1007/s11277-015-3134-3

Abstract
Nowadays, complex IoT devices are developed that support smart transportation service, medical alarm service, and smart surveillance camera which require communication to the computation server. Most of IoT devices communicate to their servers on fixed network through wireless channel. In this paper, we are focused on smart transportation service that is one of bus, train, airplane or ship that takes embedded IoT devices and passengers using IoT devices. Embedded IoT devices are communicated with embedded access router (AR) on transportation by Bluetooth/Z-wave/NFC, and passengers’ IoT devices are communicated with their own egg/AR on fixed network, or public AR on transportation. Transportation environment has a major problem that mobile node moves fast through multiple cells. Each IoT device in transportation keeps updating its current point of attachment to its home agent and corresponding node. To overcome this problem we consider feature of transportation. It has two major features. The one is mobile device has fast mobility by transportation. The other one is mobile device moves fixed route. It causes mobile device has intra mobility between several subnets of one agency when it moves into a subway or highway. Based on two features, we design proxy based architecture and extend router advertisement message to alert join in proxy domain. Then, we are classified the mobility into intra proxy mobility and global mobility. And we proposed proxy based mobility management scheme using prediction algorithm. By numerical analysis, we shows proposed scheme reduces signaling overheads and increase packet transfer rate than NEMO and proxy MIP.

Acknowledgments
This research was supported by the Ministry of Science, ICT and Future Planning (MSIP), Korea, under the Information Technology Research Center (ITRC) support program (IITP-2015-R0992-15-1006) supervised by the Institute for Information & communications Technology Promotion (IITP) and the Soonchunhyang University Research Fund.

A Development of Hybrid Drug Information System Using Image Recognition

Title : A Development of Hybrid Drug Information System Using Image Recognition
Journal : Symmetry
Authors : HwaMin Lee, Doo-Soon Park, Min-Hyung Choi
Corresponding author : Min-Hyung Choi
DOI : https://doi.org/10.3390/sym7020376

Abstract
In order to prevent drug abuse or misuse cases and avoid over-prescriptions, it is necessary for medicine taker to be provided with detailed information about the medicine. In this paper, we propose a drug information system and develop an application to provide information through drug image recognition using a smartphone. We designed a contents-based drug image search algorithm using the color, shape and imprint of drug. Our convenient application can provide users with detailed information about drugs and prevent drug misuse.

Acknowledgments
This research was supported by the Ministry of Science, ICT & Future Planning (MSIP), Korea, under the Convergence Information Technology Research Center (C-ITRC) support program (NIPA-2014-H0401-14-1022) supervised by the National IT Industry Promotion Agency (NIPA).