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Chae S.W.,National Information Society Agency | Lee K.C.,Sungkyunkwan University
Communications in Computer and Information Science | Year: 2011

The purpose of this study is aimed at understanding how task difficulty and emotion as a source of stress affect such creativity manifestation activities as exploration and exploitation in the decision support system environment. The study presented a situation where the subjects need to exert creativity to resolve a task, and the result was analyzed through the measurement of physiological signal data in the process of resolving a task. Empirical results reveal that exploration activity would be facilitated under less stressful environment, while exploitation in the stress situation. © 2011 Springer-Verlag. Source


Park S.,National Information Society Agency | Kang S.-U.,Sangmyung University | Zo H.,Korea Advanced Institute of Science and Technology
Information Technology and People | Year: 2016

Purpose – The purpose of this paper is to examine how user-perceived video quality, measured by computer assisted web survey, interacts with content richness (CR) and interactivity (IA). It also analyzes how those internet protocol television (IPTV) idiosyncrasies impacts audience perceptions (perceived usefulness (PU) and perceived resistance (PR)) and actual subscriptions. Design/methodology/approach – A computer assisted web survey was administered in Korea to collect data. A structural equation model and Z-test analyses were conducted to address the research hypotheses. Findings – User-perceived video quality influences audience perceptions (PU and PR) through interaction with CR and IA. Subscriber perceptions have a causal relationship with IPTV subscriptions. Practical implications – Balanced improvement of the IPTV value chain, from content to technical (platform, network, and terminal) perspectives, are necessary for IPTV diffusion. Also, IPTV providers should establish the diffusion strategies, minimizing the user-perceived restrictiveness as well as maximizing the PU. Originality/value – This study shows computer assisted assessment of video quality can be applied to behavior science. The research model suggests PR, which has been relatively unnoticed is included in existing technology acceptance theories. The introduced antecedents of IPTV subscriptions can be referred to as key performance indicators regarding new media adoption studies. © 2016, © Emerald Group Publishing Limited. Source


Kim H.,National Information Society Agency | Lee E.,Dongduk Womens University
The Journal of Supercomputing | Year: 2014

We propose a flexible way of allowing the users of software components to specify their security policies, and endow digitally signed certificates with more expressive power at link time. Secure linking (SL) is more flexible than type-checking or other static checking mechanisms with endowing users the freedom to specify security policies at link time, and SL is more expressive than simple digital signing with restricting the scope of guarantees made by digitally signed certificates. SL would not prevent bugs in a software component, but it gives signers of software components finer-grain control of the meaning of their certificates. We implemented a logic-based framework for SL, which consists of the SL logic, a proof verifier, a tactical prover, and user interface languages. The framework of SL encompasses the existing constraint languages, such as OCL and JML, so the security policies and the property statements of software components can be written easily using those popular languages. In this paper, we explain the linking protocol of SL, the SL framework, and the extended user interface languages with OCL and JML. We also discuss the strength of the proposed linking protocol in developing practical software systems. © 2014 Springer Science+Business Media New York. Source


Jin H.H.,National Information Society Agency
Proceedings - 2012 6th International Conference on New Trends in Information Science, Service Science and Data Mining (NISS, ICMIA and NASNIT), ISSDM 2012 | Year: 2012

This study carried out an empirical analysis on the IT-caused shifts in labor demand with the data of 498 Korean companies having domestic sales of KRW 100 billion or more during the six-year period between the fiscal years 2003 and 2008. The result of the analysis find found that IT-caused shifts in labor demand took place in favor of IT convergence industries and service industries. On the other hand, there was no a statistically-significant relationship between the labor turnover indexes and IT in IT production industries and IT high usage industries. The shifts in labor demand occurred most frequently in service industries when IT investment increased. © 2012 AICIT. Source


Chae S.W.,National Information Society Agency | Seo Y.W.,Software Engineering Center | Lee K.C.,Sungkyunkwan University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2012

Trust plays a critical role in facilitating transactions in the online shopping environment. Accordingly, various methods have been considered to enhance customer trust. Human branding has received increased attention and played a vital role in business in recent years because it has great impacts on our daily life and consumption. The purpose of this paper is to investigate the effect of applying human brands in an online shopping environment with an emphasis on product type and human brand attachment. The study combines the eye-tracking technique with a self-reported questionnaire to gain a deeper understanding of the effect of human branding in the online shopping process. The results showed that both the product type and level of human brand attachment have significant influences on a customer's visual attention as well as perceived trust towards the product. © 2012 Springer-Verlag. Source

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