• The Journal of the Korea Contents Association
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• v.17 no.2
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• pp.404-414
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• 2017

With the development of smartphones and online social networks, users produce a lot of contents and share them with each other. Therefore, users spend time by viewing or receiving the contents they do not want. In order to solve such problems, schemes for recommending useful contents have been actively studied. In this paper, we propose a contents recommendation scheme using collaborative filtering for users on online social networks. The proposed scheme consider a user trust in order to remove user data that lower the accuracy of recommendation. The user trust is derived by analyzing the user activity of online social network. For evaluating the user trust from various points of view, we collect user activities that have not been used in conventional techniques. It is shown through performance evaluation that the proposed scheme outperforms the existing scheme.

• The Journal of the Korea Contents Association
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• v.18 no.5
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• pp.280-291
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• 2018

Recently, various interactions have been actively conducted through sharing and expressing opinions among users in social networks. In this process, since malicious users and fault information spread misinformation, trust is reduced irrespective of their will. To solve this problem, studies have been conducted to determine the trust of a user through direct-connected users. In this paper, we propose a enhanced user indirect trust discrimination scheme considering the connection relation and influence of users. The proposed indirect trust computation scheme derives the user's area of interest through user interaction and reconstructs the existing network considering the user connection relationship. The final indirect trust is also detected by determining whether the user is a malicious user through the influence of the user. Through various performance evaluations, we show that the proposed scheme achieves better performance than the existing method.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.467-468
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• 2017

본 연구에서는 모바일 지능형 개인비서 서비스의 음성 사용자 인터페이스(Voice User Interface, VUI) 사용에 있어서 혁신저항요인을 연구한다.

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.293-294
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• 2013

This study looks at any differences that the graphic image representation method for information design may have on the user's perception and sensitivity.

• The Journal of Information Systems
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• v.9 no.1
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• pp.45-59
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• 2000

This study empirically tests that user satisfactions are influenced by factors focusing on information systems. The findings are as follows； 1. User Participation on information systems influence significantly system reliability, system usage and work environment. 2. Only top management's support on information system influences significantly efficient system usage. 3. Ability of user computing on information system influences significantly system usage.

• The Journal of Korean Association of Computer Education
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• v.9 no.1
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• pp.71-80
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• 2006

As e-commerce developing rapidly, it is becoming a research focus about how to find customer's behavior patterns and realize commerce intelligence by use of Web mining technology. One of the most successful and widely used technologies for building personalization and goods recommendation system is collaborating filtering. However, collaborative filtering have serious data sparsity problem. Traditional association rule does not consider user's interests or preferences to provide a user with specific personalized service.In this paper, we propose an goods recommendation system, which is integrated an collaborative filtering algorithm with item-to-item corelation and an improved Apriori algorithm. This system has user's interests or preferences ro provide a user with specific personalized service.

• Proceedings of the Korea Association of Information Systems Conference
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• 1996.11a
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• pp.29-48
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• 1996

Previous studies on user training have largely focused on assessing models which describe the determinants of information technology usage or examined the effects of training on user satisfaction, productivity, performance, and so on. Scant research efforts have been made, however, to examine those effects of training by using theoretical models. This study presented a conceptual model to predict intention to use information technology and conducted an experiment to understand how training for computer skill acquisition affects primary variables of the model. The data were obtained from 32 student subjects of an experimental group and 31 students of a control group, and the information technology employed for this study was a university's electronic mail system. The study results revealed that attitude toward usage and perceived behavioral control helped to predict user intentions; outcome expectations were positively related to attitude toward usage; and self - efficacy and perceived behavioral control. The changes in those variables suggest more causal effects of user training than other survey studies.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.819-823
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• 2006

In games, immersion is the most important factor that makes the player play game continuously. The user's inability to immerse in game makes him/her not interested in game, so it makes the user give up. So, we must perceive the immersion factor that the games have. By applying the factors that causes immersion to the game development, we will be able to multiply the joy of game to the user, and bring high profit to the game developing enterprises. To this, this study finds out the interrelations between the factor of immersion existing inside the game and the components of the game to experience the highest immersion status to the user.

• Journal of the Korean Home Economics Association
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• v.36 no.6
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• pp.109-122
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• 1998

This is succeeding Study of 'A Study on the Basic Framework and Program Development for Establishment of Institutional Household Manager System -Focused on the Curriculum'. This study focused on the needs analysis of manager and user of institutional household. Data were collected by individual interview, from 47 managers and 84 users of institutional household in Seoul, Pusan & Kyungnam, Taegu & Kyungbuk province. The results were as follows; there were differences in the demands of manager and user of institutional household management, manager's needs of Institutional Household Manager lower than user, the manager of Domitory. Training Institute showed higher than Nursery School and Public Welfare Facilities.

• Journal of the Korean housing association
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• v.15 no.4
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• pp.87-97
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• 2004

The purpose of this study is to introduce the design process for the 'natural-friendly' kindergarten playground using participatory design method. The 'A' kindergarten in Daejon was selected as a case study. The concept of the design was decided by the user's needs which draw out the pictures of children, owner's educational philosophy, and request of the teachers. As a result, the concept approached to 'our neighborhood (Korean traditional village)' image, and was planned with a focus on open space, which allows rich in natural elements(earth ground, trees, flowers vegetable farm, animals, water and sand etc.) and various play activities. And a user participatory design method proved that it was proper to design a kindergarten playground.