• Journal of KIISE
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• v.44 no.11
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• pp.1231-1235
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• 2017

Given the network structure in online social network, it is important to determine a way to distinguish spam accounts from the network features. In online social network, the service provider attempts to detect social spamming to maintain their service quality. However the spammer group changes their strategies to avoid being detected. Even though the spammer attempts to act as legitimate users, certain distinguishable structural features are not easily changed. In this paper, we investigate a way to generate meaningful network structure features, and suggest spammer detection method using recursive structural features. From a result of real-world dataset experiment, we found that the proposed algorithm could improve the classification performance by about 8%.

• Journal of the Korean Society for Library and Information Science
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• v.54 no.2
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• pp.299-322
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• 2020

The purpose of this study is to suggest reading education plan by exploring the characteristics of peer-relationship networks of elementary school students, and grasping the effects of those characteristics on the reading competencies. Social network analysis method was used, and centrality analysis, QAP correlation and QAP multiple regression analyses were conducted to examine the relationship between peers and reading competencies. The findings show that the help relationship rather than peer characteristics and friend relationship was related to reading competencies. However, since the friend relationship has an effect on the help relationship, it is also found that the relationship between the friend and the help relationship network should be considered in order to improve the reading competencies. This network analysis results are meaningful in reading education plan in the sense that they suggest a useful guideline for the formation of members ranging from individuals, small groups, to a whole class, and for periodical activities considering situation and learning purposes such as before, during, and after reading activities.

• Journal of the Korean association of regional geographers
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• v.21 no.2
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• pp.286-303
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• 2015

This paper aims at analyzing the role of Korean ethnic network in the settlement process of Korean immigrants, and elucidating their utilization measures, through the case Study of Korean Immigrants in LA. The main results of this study are as follows. Firstly, the majority of respondents used Korean ethnic networks and Korean town in the immigration process. According to the results of ANOVA test, Korean ethnic network are more importantly considered by the groups such as elderly, livers in Korean town, and people who the first settlement was LA. Secondly, respondents more frequently use Korean ethnic network in the activities such as church, shopping and business. Especially, the groups such as short immigration term, elderly, poor English ability are more frequently use Korean ethnic network. Thirdly, Viewing the cognition of respondents about the necessity of Korean ethnic networks, respondents want to use them for strengthening the ties of domination society. Finally, utilization of Korean ethnic churches, Korean ethnic business organizations and Korean ethnic web-site portal are proposed for activating Korean ethnic networks.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.06a
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• pp.347-350
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• 2007

An ECG analysis with activity monitoring for the home care of elderly persons or patients, using wireless sensors technology was design and implemented. The changes in heart rate occur before, during, or following behavior such as posture changes, walking and running. Therefore, it is often very important to record heart rate along with posture and behavior, for continuously monitoring a patient's cardiovascular regulatory system during their daily life activity. The ECG and accelerometer data are continuously recorded with a built-in automatic alarm detection system, for giving early alarm signals even if the patient is unconscious or unaware of cardiac arrhythmias. The hardware allows data to be transmitted wirelessly from on-body sensors to a base station attached to server PC using IEEE802.15.4. If any abnormality un at server then the alarm condition sends to the doctor' PDA (Personal Digital Assistant).

• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.328-333
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• 2008

지역에 밀착한 관광이 추진되면서, 관광레크레이션지역의 개발 및 관리운영에 있어서는 시민참여에 의한 자원 및 지역만들기가 상당히 중요한 이슈로 떠오르고 있다. 그러나 국내에서는 이러한 시민참여 활동의 역사가 짧고, 특히 관광과 관련해서는 아직 시민참여 활동이 본격화 되고 있지 못해, 그의 구체적인 활동범위 및 방향 등이 정리되지 못한 상태에 있다. 본 연구는 관광레크레이션지역에 있어서 시민참여의 활동범위와 그 추진방향에 대한 틀을 마련하기 위한 기초연구로서, 일본국영공원을 대상으로, 관광레크레이션지역에서의 시민참여 활동의 실태와 그 특성을 분석한 것이다. 연구결과 국영공원의 시민참여 활동은 테마 자원과 시설을 중심으로 매우 세분화되고 있고, 그 범위는 단순한 안내 및 관리가능을 넘어 연구회 및 학습회 등을 통해 보다 조직적, 능동적으로 참여함으로서 개발계획과 평가단계까지 그 영역이 확대되고 있는 것으로 나타난다. 또한 이들의 활동은 대상지 내에 국한되지 않고, 역 외의 유관단체와 연계해 하나의 교류네트워크의 축을 형성함으로써 자원자체의 활성화에도 크게 기여하는 것으로 나타난다.

• Environmental engineer
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• v.23 s.239
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• pp.62-65
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• 2006

• The Journal of Information Technology
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• v.6 no.4
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• pp.125-134
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• 2003

This paper is to measure the sensitivity of relations in communication network operation. In order to procure an important adequacy in the network operation and quality improvement, it is necessary to increase network operation efficiency and analyze the characteristic of network operation. Finally, we analyze costing appropriate operation, propose profit increase scheme and apply realistic business. First of all it's important to improve and estimate a proper operating cost thoroughly and comprehensively. Because the important issue of this process is quality process and this quality process occurs customers' satisfaction, therefore, to make a mutual relation in-between individual change of each element is to analyze a reasonable standard. So, for this reason we study on structuring nice models for network operation and estimating many scenarios for measuring efficiency. Especially those in economic and sensitivity based.

• Proceedings of the CALSEC Conference
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• 1999.11a
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• pp.129-142
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• 1999

협의: 컴퓨터 네트워크(인터넷)을 활용한 상거래 비즈니스 광의: 컴퓨터 네트워크를 활용하여 수행되는 광고, 수발주, 설계, 기술개발, 생산, 판매, 결제 등 모든 경제 활동 유형: -구조화된 전자상거래 : EDI나VAN을 활용 특정기업간 규정된 거래조건하에서 상거래 -전자시장에서의 전자상거래: WWW을 활용 불특정 기업간: 최적의 상대를 찾아 거래하는 것 (중략)

• KOREAN POULTRY JOURNAL
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• v.53 no.9
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• pp.124-127
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• 2021

지난해 AI 발생 이후 계란 값이 연일 상승하고 있다. 소비자 물가 안정을 위해 정부에서는 올해 상반기에 이어 하반기에도 게란 수입에 막대한 세금을 투입한다는 계획을 발표하면서 양계 농가들의 공분을 사는 와중에 소비자를 대표해 (사)소비자공익네트워크 김연화 회장을 만나 최근 활동과 함께 양계(닭고기, 계란)에 대한 생각을 들어보았다.

• The Journal of Society for e-Business Studies
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• v.18 no.1
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• pp.33-55
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• 2013

Information sharing behavior in the Internet has raised much interest. Recently, social network sites provide a new information sharing channel for the users who want to connect with others based on common social background or tastes. Especially, we focus that a social network site becomes one of major routes for information sharing about socially influential issues. Therefore, studying how information is diffused via a social network site may give theoretically, practically significant implication. Based on the assertion, we investigated user's behavior to mediate other user's information messages. We define information mediating behavior as concurrent actions of filtering and distributing behavior of the digital content that is originated from one of the connected users. In this study, we intended to understand the effects of information mediating behavior, and tried to understand characteristics of re-mediating of previously mediated information. Using an agent-based simulation model, we found that information mediating behavior increased the extent of information diffusion significantly. In addition, even a small degree of mediating probability could boost up the level of information diffusion in the case of a re-mediating condition. We believe that those findings provide remarkable insight of research and business application on both of information sharing and diffusion in a social network site.