• Journal of The Korean Association of Information Education
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• v.5 no.1
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• pp.159-167
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• 2001

According to the development of the educational information business, many schools have been changing. For example, school networks and education networks have been constructed, the teaching-learning methods have been diversified, and information has been shared. But the information are not being controlled and shared effectively in schools and classrooms. The purpose of this study is to research school networks increasing efficiency highly with low expenses, to design Linux-based class management database on the basis of analyzing the teacher's class management, and to develop this database which can help teachers manage classes effectively.

• Journal of the HCI Society of Korea
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• v.7 no.1
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• pp.11-17
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• 2012

A number of context information is shared through social network service(SNS). Among them, we focused on the information which is rarely shared for various reasons. The result indicated that users prefer to avoid certain types of context information because of： 1)containing socially unacceptable content, 2)laking of desire for disclosure, and 3)potential risk of privacy. Concerning privacy concern, it was found that users developed their own management strategy to control context information rather than employing existing system features. Drawing on Communication Privacy Management(CPM) theory, we analyzed findings and suggested guidelines for system design.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.189-192
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• 2005

In this paper, we present a Petri Net (PN) model for reliability analysis of a shared database system. The system consists of components; a database, two processors, two memory and a bus. The database should be operational and at least one of the component should be also operational. Otherwise system will be down. Each component can be failed and repaired individually. Stochastic Reward Net (SRN) Model for reliability analysis is developed. SRN is potential to define various reward function and can be easily used to obtain performance measures. The modeling techniques using variable cardinality, enabling function, timed transition priority in SRN are shown.

• Journal of Convergence for Information Technology
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• v.9 no.1
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• pp.105-115
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• 2019

This study empirically analyzed the effect of outdoor brand consumer's consumption value and company's creating shared values activity on consumers' purchase intention. The sub-variables of consumption value were set as functional value, conditional value, and emotional value as factors affecting consumers' purchase intention. The sub-variables of company's creating shared values activities were set as economic value, relational value, social value. As a result of analysis, functional value, conditional value, and emotional value of consumption value were found to have a positive effect on purchase intention, and economic value, social value, and relational value of company's creating shared values were all positively influenced Respectively. According to the results of the analysis, it is found that both consumption value of outdoor brand consumers and company's creating shared values activities are positive factors for purchase intention. This result can be deduced that consumers 'consumption value and company's creating shared values activities in outdoor brand industry are already reflected in consumers' purchase intention.

• Proceedings of the IEEK Conference
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• 2003.07a
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• pp.505-508
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• 2003

• The Journal of Korean Institute of Communications and Information Sciences
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• v.26 no.4B
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• pp.410-417
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• 2001

본 논문에서는 여러개의 WDM 채널을 동시에 처리할 수 있는 새로운 출력 공유버퍼를 제시했다. 분석을 통해 만약 버퍼에서 사용되는 광 도파로열 격자의 누화 값이 -33dB이하이며, ,BER 10-9의 시스템 성능을 만족하면서 8개 이상의 WDM 체널을 동시에 버퍼링할 수 있음을 보였다.

• The Transactions of the Korea Information Processing Society
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• v.3 no.1
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• pp.107-117
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• 1996

This paper proposes a conceptual model for distributed problem solving(DPS), where cooperation and communication among agents are based on virtual shared memory (VSM) In this model, all agents in a DPS system view all the memory in a distributed computer system as a single shared memory in which data, tasks, and results can in a distributed computer system as a single shared memory, in which data, tasks, and results can / be accessed by any of the agents. Several agents cooperatively solve a complex problem, as agents write data, intermediate results of execution, and tasks requested to other agents to VSM and other agents read or execute them. Also, in order to develop DPS systems based on the proposed conceptual model, this paper designs a DPS system development environment(DPS-VSM)using Network Linda. Thi spaper shows utility ofthe proposed model by presenting an example of simulation a VSM-based DPS system, and analyzes the model by comparing the features of DPS- VSM with some other DAI programming shells.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.1
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• pp.141-148
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• 2015

This paper proposes the BDAS(Big Data analysis Scheme) design that extracts the real time shared information from SNS and Web, analyzes the extracted data rapidly for customers, and makes an on-line marketing strategy efficiently. First, the BDAS collects the data shared in SNS and Web. Second, it provides the result of visualization by analyzing the semantics of the collected data as positive or negative. Therefore, because the BDAS ensures an average 90% accuracy in judging the semantics about the shared SNA and Web data, it can judge customer's propensity accurately and be used for on-line marketing strategy efficiently.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.28 no.6
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• pp.1343-1354
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• 2018

OAuth 2.0 bearer token and JWT(JSON web token), current standard technologies for authentication and authorization, use the approach of sending fixed token repeatedly to server for authentication that they are subject to eavesdropping attack, thus they should be used in secure communication environment such as HTTPS. In OAuth 2.0 MAC token which was devised as an authentication scheme that can be used in non-secure communication environment, server issues shared secret key to authenticated client and the client uses it to compute MAC to prove the authenticity of request, but in this case server has to store and use the shared secret key to verify user's request. Therefore, it's hard to provide stateless authentication service. In this paper we present a randomized token authentication scheme which can provide stateless MAC token authentication without storing shared secret key in server side. To remove the use of HTTPS, we utilize secure communication using server certificate and simple signature-based login using client certificate together with the proposed randomized token authentication to achieve the fully stateless authentication service and we provide an implementation example.

• Journal of Internet Computing and Services
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• v.24 no.4
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• pp.107-115
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• 2023

This study analyzes the content of YouTube Vlog videos created by patients of Coronavirus disease 2019 ("COVID-19") in South Korea and viewer comments on those videos. As this new infectious disease started to sweep the world in late 2019 and early 2020, the public started facing fear and uncertainty stemming from the lack of sufficient and accurate information about the virus. At the same time, as COVID-19 patients in South Korea were treated in isolation to prevent the spread of the virus, the patients themselves were experiencing anxiety and exclusion from the society. During this period, there was an increase in YouTube Vlog videos created by the patients in which they shared their experiences going through the treatment and recovery processes. To understand how these YouTube Vlog videos were being used by the patients to connect with the society and seek support in a state of isolation and anxiety, this study conducted a qualitative multi-case analysis of three sample YouTube Vlog video channels to analyze their content, as well as a lexicon-based sentiment analysis of viewer comments to understand the experiences and reactions of viewers. The patients' YouTube Vlog videos showed that they shared similar stages of progress, despite each emphasizing a different main theme. Overall, the tone of the viewer comments became increasingly positive over time, although with some variance among different patient cases and stages. The results confirmed that Vlogs of patients played a significant role in reducing the uncertainty around COVID-19 and strengthening social support for the patients. The findings of this study can improve an understanding of the psychological and behavioral aspects of patient experience in isolated treatment and the impact of shared communication among members of society in times of crisis.