• Asia pacific journal of information systems
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• 제26권2호
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• pp.268-289
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• 2016

While most of studies have paid attention to the initial adoption of a specific application, research on applications has not focused on an individual's update decision process. This study draws upon both dual information processing and status quo bias perspectives as a comprehensive theoretical lens to explain why individuals do not update their applications. This study assumes that individuals' inertia could be the main reason for their reluctance to update the applications. Based on a survey of 186 smartphone users, this study demonstrated that both habit as an affective trigger of system 1 thinking and sunk cost as a cognitive trigger of system 2 thinking promoted the two types of inertia (i.e., affective and cognitive based inertia) in individuals, which have a negative effect on their willingness to update their applications. By grounding the research model in a theoretical view, such as dual information processing and status quo bias, this study provides a unique theoretical lens from which to view individuals' behaviors, thereby gaining a better understanding of their decision not to update to the current version of applications. This study also investigates the moderating effect of the types of applications on the relationships between affective/cognitive-based inertia and willingness to update. Results show that both habit and sunk cost decrease the willingness to update because they increase both affective and cognitive-based inertia. This study also found that the effects of affective/cognitive based inertia differed depending on the type of applications.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권5호
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• pp.2067-2080
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• 2016

Cooperative spectrum sensing (CSS) for vacant licensed bands is one of the key techniques in cognitive radio networks. Currently, sequential probability ratio test scheme (SPRT) is considered as a powerful soft decision approach to improve the sensing result for CSS. However, SPRT assumes all secondary users (SU) are honest, and thus offering opportunities for malicious SUs to launch the spectrum sensing data falsification attack (SSDF attack). To combat such misbehaved behaviors, recent efforts have been made to trust mechanism. In this paper, we argue that powering SPRT with traditional trust mechanism is not enough. Dynamic SSDF attackers can maintain high trust in an alternant process of submitting honest or false sensing data, resulting in difficultly detecting them. Noting that the trust value of dymamic SSDF attackers behave highly volatile, a novel trusted SPRT scheme (VSPRT) based on volatility decay analysis is proposed in this paper to mitigate the harmful effect of dynamic SSDF attackers in the process of the soft-decision data fusion, and thus improving the accuracy of the final sensing result. Simulation results show that the VSPRT scheme outperforms the conventional SPRT schemes.

• 복식문화연구
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• 제23권3호
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• pp.384-399
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• 2015

The purpose of this study is to empirically investigate consumers' clothes shopping orientation factors and perceived risk factors affecting the purchase intention for fashion products in social commerce. For this study, questionnaires were given to 500 adults in their 20s~30s who had experience of using social commerce related to general products or services. To analyze the results of this study, we conducted descriptive analysis, factor analysis, reliability analysis, a chi-square independence test, and hierarchical regression analysis using SPSS 18.0. The results were as follows. First, social commerce users'clothes shopping orientations were classified into the pursuit of pleasure, brand, fashion innovation, trend, and utility, and the perceived risks were classified into the risks related to products, consumer service, loss of purchase opportunity, confidence in the web site, economy, and security. Second, clothes shopping orientation factors and perceived risk factors had a somewhat significant influence on the purchase intention for fashion products. Third, there was a significant difference between sexes regarding the influences of the clothes shopping orientation factors and perceived risk factors for the purchase intention of fashion products. Finally, this study aims to provide useful information for fashion companies to enable them to establish specific strategies that can influence consumers'purchase behaviors through social commerce.

• 경영과정보연구
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• 제32권3호
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• pp.173-188
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• 2013

중고등교과 관련 이러닝은 사용자(학습자)와 구매자(학부모)가 다른 경우가 많다. 본 연구는 이러닝사용자와 구매자의 선택행동이 다를 것이라는 가정을 실증하였다. 분석결과를 요약하면 다음과 같다. 전체소비자를 대상으로 할 경우 이러닝 강좌에 대한 인지된 유용성, 상호작용성, 사이트 명성은 소비자의 수강의도에 긍정적인 영향을 주었지만, 콘텐츠품질은 회귀되지 않았다. 그러나 이러닝사용자(학습자)집단에서는 상호작용과 인지된 유용성, 콘텐츠 품질은 영향을 주었지만 명성은 회귀되지 않았다. 구매자(학부모)집단은 명성과 인지된 유용성에 영향을 받은 반면, 콘텐츠품질이나 상호작용성에는 영향을 받지 않았다.

• 제어로봇시스템학회논문지
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• 제11권4호
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• pp.314-321
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• 2005

In this paper an intelligence embedding quadruped pet robot is described. It has 15 degrees of freedom and consists of various sensors such as CMOS image, voice recognition and sound localization, inclinometer, thermistor, real-time clock, tactile touch, PIR and IR to allows owners to interact with pet robot according to human's intention as well as the original features of pet animals. The architecture is flexible and adopts various embedded processors for handling sensors to provide modular structure. The pet robot is also used for additional purpose such like security, gaming visual tracking, and research platform. It is possible to generate various actions and behaviors and to download voice or music files to maintain a close relation of users. With cost-effective sensor, the pet robot is able to find its recharge station and recharge itself when its battery runs low. To facilitate programming of the robot, we support several development environments. Therefore, the developed system is a low-cost programmable entertainment robot platform.

• 한국정보시스템학회지:정보시스템연구
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• 제18권4호
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• pp.87-103
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• 2009

Although the Internet has been a important communication tool in modem societies, researchers did not pay attention to its' positive impacts on individual's psychological process. The Internet provides users with a unique environment such as visual isolation, non face-to-face communication, and easiness to escape from social influences. This environment enables people to take free action according to their personality and disclose themselves. From the uses and gratification perspective, the current research reveals that individuals with high extraversion are inclined to maintain social networking sites and those with high openness participate in web communities. The findings indicate that individuals' social use of the internet may reflect their personality. This study, also, reveals that controlling the big five personality dimensions, the amount of self-disclosure through ones' social networking site is positively related with subjective happiness. This finding suggests that like confession behaviors in religious or curing facilities, people can use the Internet as a therapeutic or a preventative method for promoting their well-being. Theoretical contributions and practical implications are discussed.

• 복식문화연구
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• 제14권6호
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• pp.1027-1041
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• 2006

The purpose of this study was to identify the differences of internet shopping attitude, shopping behavior, and shopping satisfaction according to purchasing frequency of internet shoppers for children's clothing. Data were collected from 170 female internet users who had purchasing experiences of children's clothing. For data analysis, factor analysis, one-way ANOVA, Duncan test, cross tabulation, regression analysis, t-test, frequency and multi- response analysis were conducted. The results are as follows: The internet shoppers for children's clothing were classified by purchasing frequency. Factors of internet shopping attitude were convenience, reliability, and safety. Significant differences were found on internet usages, internet attitudes, and shopping behaviors between two groups. Heavy purchasers used internet longer, had more positive attitude toward convenience and safety, and paid more money than light purchasers. Significant differences were found on internet attitudes according to age and internet usage. Convenience and safety factors had impact on internet shopping satisfaction.

• Nuclear Engineering and Technology
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• 제36권1호
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• pp.53-63
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• 2004

The research was performed to develop a CANDU-6 Core Monitoring System(CCMS) that enables operators to have efficient core management by monitoring core power distribution, burnup distribution, and the other important core variables and managing the past core history for Wolsong nuclear power plant unit 1. The CCMS uses Reactor Fueling Simulation Program(RFSP, developed by AECL) for continuous core calculation by integrating the algorithm and assumptions validated and uses the information taken from Digital Control Computer(DCC) for the purpose of producing basic input data. The CCMS has two modules; CCMS server program and CCMS client program. The CCMS server program performs automatic and continuous core calculation and manages overall output controlled by DataBase Management System. The CCMS client program enables users to monitor current and past core status in the predefined GUI(Graphic-User Interface) environment. For the purpose of verifying the effectiveness of CCMS, we compared field-test data with the data used for Wolsong unit 1 operation. In the verification the mean percent differences of both cases were the same($0.008\%$), which showed that the CCMS could monitor core behaviors well.

• 가정∙방문간호학회지
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• 제20권1호
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• pp.24-32
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• 2013

Purpose: This study aimed to clarify the characteristics of musculoskeletal problems in elderly Korean women and their actual and current use of dietary supplements by conducting a descriptive survey. Methods: The 1-month study began on April 3, 2012. A total of 150 elderly women from City D responded to the survey questionnaire used in this study. Results: Among the respondents, 55.3% used dietary supplements, although they had not consulted a physician for a definitive diagnosis of their condition but reported a self-perceived musculoskeletal problem instead. In addition, they engaged in healthy behaviors such as exercising and dietary supplement intake, without receiving any medical treatment. Compared with the nonusers, the dietary supplement users self-perceived a relatively more serious musculoskeletal problem (t =4.566, p<.001). Among the most commonly used supplements, multivitamins ranked first, followed by glucosamine and omega-3. Conclusion: Nurses should thoroughly monitor and maintain a positive attitude toward their patients' use of dietary supplements in order to appropriately educate them about the proper use of supplements.

• 한국통신학회논문지
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• 제27권7C호
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• pp.685-695
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• 2002

본 논문에서는 실제 자원의 개발 전에도 망 관리 시스템의 개발 및 운용 테스트를 수행하도록 지원하는 실제자원 시뮬레이터(RRS: Real Resource Simulator)를 소개한다. RRS는 객체의 상태를 유지하는 MOT(Managed Object Table)와 사용자가 정의한 동작 특성을 유지하는 SDT(Simulation Data Table), 랜덤(Random) 값과 랜덤주기(interval) 값을 발생할 지원 함수들, 순차적인 사건 발생 또는 값의 수정을 지원하는 스케줄링 테이블 그리고 이들을 전체적으로 관장하는 메인 커널로 이루어져 있다. 또한 사용자는 확장된 GDMO 문법을 이용하여 RRS의 동작 특성을 지정할 수 있는데, 본 논문에서는 이를 처리할 확장된 GDMO 컴파일러를 설명하고, 사용자와 RRS간의 동작, RRS와 에이전트간 동작, RRS, 에이전트, 망관리 시스템으로 이루어진 환경에서의 동작 확인 결과를 보인다.