• Asia pacific journal of information systems
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• v.16 no.4
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• pp.217-238
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• 2006

In this study, we propose a virtual community recommendation model based on user behavioral models. It is designed to recommend optimal virtual communities for an active user by applying case-based reasoning (CBR) using behavioral factors suggested in the technology acceptance model (TAM) and its extensions. Also, it is designed to filter its case-base by considering the user's needs type before applying CBR. To test the usefulness of our model, we conduct two-step validation - experimental validation for the collected data, and survey validation for investigating the actual satisfaction level. Experimental results show that our model presents effective recommendation results in an efficient way. In addition, they also show that the information on the user's needs type may generate opportunities for cross-selling other commercial items.

• Journal of Intelligence and Information Systems
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• v.14 no.4
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• pp.135-145
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• 2008

Needs for copyright protection of multimedia content are getting increased because of the internet growth. In this paper, a new technology which protects the content copyright to provide different content services by user level using the digital watermarking technology was proposed. The service can be provided by two layers of a paid user and a free user. By the proposed method, the paid user can use the high quality content and the free user only can use the low quality content. The digital watermarking technology was used to hide information to be able to improve the content quality.

• Journal of Korean Library and Information Science Society
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• v.29
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• pp.213-239
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• 1998

The purpose of this study is to provide more effective utilization of Internet patent information databases and to help develop an user-friendly interface design. Search functions, level of user-friendliness and user-suport have been closely analyzed, using USPTO, QPAT-US, IBM as well as the relatively well-known domestically-developed Patrom. The factors used in this quality evaluation are those resulting from the combination of CD-ROM databases and traditional databases. The followings are the results. Patrom most effectively utilizes the characteristics of databases. USPTO provides the most adequate Interface for a novice user. QPAT-US employs various auxilary services while IBM uses an assortment of search methods and images. In addition, it is expected that the findings will contribute to the development of user-friendly interface databases.

• Journal of Information Technology Applications and Management
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• v.19 no.4
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• pp.97-113
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• 2012

In order to implement the real-time enterprise (RTE) and smart work effectively, many companies have introduced a mobile office. A mobile office improves employee productivity and increases ability to respond to business opportunities by helping employee manage their business anytime and anywhere. However, it also raises the user's stress level. We conducted in-depth interviews with users to assess user's perception of a mobile office according to Saaty's BOCR model. Based on the results of the interviews, we set variables affecting user's perception of the mobile office using factor analysis. This study revealed that support for real-time business, support for communication and collaboration, and information processing quality were positively related to continuous intention to use mobile office. Further study demonstrated that three variables have mediating effect between the psychological stress and continuous intention to use. This result implies that the system quality and function are the key elements of mobile office and may contribute to the continuous use.

• Journal of Information Technology Applications and Management
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• v.22 no.4
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• pp.127-158
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• 2015

This study analyzes the factors affecting user resistance to ERP in Vietnam, including the factors related to the cultural values of the users, which is rarely dealt in the previous ERP research. A research model is developed based on Klaus and Blanton [2010] and Hofstede [2011], consisting of the independent variables ('cultural value', 'system', 'organization', and 'process' related variables), a dependent variable ('user resistance to ERP') and a moderating variable ('self efficacy'). Major results of study include (1) users with high degree of uncertainty avoidance and femininity regard ERP as potential threat to their job and are likely to resist to ERP; (2) By training the users with high level of femininity to enhance their self efficacy, the degree of resistance to ERP can be reduced; (3) For ERP to be utilized successfully, systems should be developed in such a way in which working with ERP is not regarded as complex and difficult; and (4) communication and training play an important role in reducing the resistance of users.

• Journal of the Ergonomics Society of Korea
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• v.25 no.3
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• pp.43-47
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• 2006

Macro interface is primarily focused at the organization, while micro interface is primarily focused at the products or services. UI(User Interface) or UX(User Experience) organizations in Korea are institutionalized from 2000 years. Since most of the UI organizations are not institutionalized with the strategic plan, structures of them aren't optimized efficiency. The structure of the organization is conceptualized as having three core dimensions: complexity, formalization, and centralization. The status of the UI organizations in Korea is reviewed with these dimensions. This study issued the key success factors for institutionalization for UI team. Organizational maturity is considered in 5 levels based on a model by CMMI. The UI strategy has to be based the maturity level of the organization.

• Journal of information and communication convergence engineering
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• v.2 no.2
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• pp.128-131
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• 2004

We suggest resource authorization system based on RBAC admitting someone to access resources. In existing grid environment, The authorization mechanism on user's resource is to give users an authority on the basis of DN(Distinguished Name) of proxy certificate and map file mapped in local system ID by one-to-one. In this case, it is difficulty in resource management such as each accounting management, memory resource, and disk resource, if the number of users, who want to use them is increased. To solve this problem, we specify the role of user's task in extension fields of his proxy certificate instead of the authorization mechanism of user's ID and propose resource authorization system being able to access his resource.

• Journal of Korea Society of Digital Industry and Information Management
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• v.19 no.4
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• pp.53-71
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• 2023

This study explores the relationship between various user factors and the level of trust in ChatGPT, a sophisticated language model exhibiting human-like capabilities. Specifically, we considered demographic characteristics such as age, education, gender, and major, along with factors related to previous AI experience, including duration, frequency, proficiency, perception, and familiarity. Through a survey of 140 participants, comprising 71 females and 69 males, we collected and analyzed the data to see how these user factors have a relationship with trust in ChatGPT. Both descriptive and inferential statistical methods, encompassing multiple linear regression models, were employed in our analysis. Our findings reveal significant relationships between user factors such as gender, the perception of prior AI interactions, self-evaluated proficiency, and Trust in ChatGPT. This research not only enhances our understanding of trust in artificial intelligence but also offers valuable insights for AI developers and practitioners in the field.

• Smart Media Journal
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• v.13 no.6
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• pp.62-71
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• 2024

This study applies topic modeling to uncover user experience and app issues expressed in users' online reviews of a fan community platform, Weverse on Google Play Store. It allows us to identify the features which need to be improved to enhance user experience or need to be maintained and leveraged to attract more users. Therefore, we collect 88,068 first-level English online reviews of Weverse on Google Play Store with Google-Play-Scraper tool. After the initial preprocessing step, a dataset of 31,861 online reviews is analyzed using Latent Dirichlet Allocation (LDA) topic modeling with Gensim library in Python. There are 5 topics explored in this study which highlight significant issues such as network connection error, delayed notification, and incorrect translation. Besides, the result revealed the app's effectiveness in fostering not only interaction between fans and artists but also fans' mutual relationships. Consequently, the business can strengthen user engagement and loyalty by addressing the identified drawbacks and leveraging the platform for user communication.

• Journal of Korea Game Society
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• v.15 no.6
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• pp.17-28
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• 2015

This study attempted to identify differences in user experience and app game fun, satisfaction, use intention between fitness app games at different level of interaction design. The playtesting method was conducted on 100(male 50, female 50) university students using 'Enjoy Your Fitness', a fitness app game developed by The Center for Health Communication Studies. The results found that more interactive app game is higher in the level of user experience such as fitness accomplishment, flow, and interest. Fitness app game's fun, satisfaction, use intention is also higher on interactive fitness app game. As the study verified that interactive fitness app game had stronger effects in user fitness experience and user experience than general fitness app games through experimental studies, it may contribute to design fitness mobile app game for health improvement.