• 디지털융복합연구
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• 제9권1호
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• pp.25-36
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• 2011

This paper examines user's loyalty to social network sites (SNS) from switching costs (SC) incurred by both technology and social factors. We propose a research model specifying that the perceived values of resources of the factors affect the SC and the SC determine user's loyalty. Empirical results show that technology variables of ease of use and privacy controllability, and social variables such as network size, usefulness of SNS activities, and awareness of network status have significant effect on SC. In particular, ease of use is negatively associated with SC. Since it is shown that in overall the impact of social factors is stronger than that of technology factors, we can interpret that technological superiority itself does not lead to the success of SNS. Contributions of this paper are: 1) application of SC in SNS research from the resource based perspective, which can be used for developing strategies of sustainable SNS, and 2) provision of different perspective toward the variable of ease of use, which has been considered an important factor of technology acceptance.

• 반도체디스플레이기술학회지
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• 제19권4호
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• pp.34-38
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• 2020

In this paper, we implement a Dashcam system capable of shooting 360 degrees using a Raspberry Pi, shock sensors, distance sensors, and rotating camera with a servo motor. If there is an object approaching the vehicle by the distance sensor, the camera rotates to take a video. In the event of an external shock, videos and images are stored in the server to analyze the cause of the vehicle's accident and prevent the user from forging or tampering with videos or images. We also implement functions that transmit the message with the location and the intensity of the impact when the accident occurs and send the vehicle information to an insurance authority with by linking the system with a smart device. It is advantage that the authority analyzes the transmitted message and provides the accident handling information giving the user's safety and convenience.

• 한국정보시스템학회지:정보시스템연구
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• 제32권4호
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• pp.29-50
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• 2023

Purpose The impact of online reviews is widely acknowledged, with extensive research focused on text-based reviews. However, there's a lack of research regarding reviews in video format. To address this gap, this study aims to explore the connection between company-sponsored product review videos and the extent of directive speech within them. This article analyzed viewer sentiments expressed in video comments based on the level of directive speech used by the presenter. Design/methodology/approach This study involved analyzing speech acts in review videos based on sponsorship and examining consumer reactions through sentiment analysis of comments. We used Speech Act theory to perform the analysis. Findings YouTubers who receive company sponsorship for review videos tend to employ more directive speech. Furthermore, this increased use of directive speech is associated with a higher occurrence of negative consumer comments. This study's outcomes are valuable for the realm of user-generated content and natural language processing, offering practical insights for YouTube marketing strategies.

• 한국정보시스템학회지:정보시스템연구
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• 제17권4호
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• pp.99-127
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• 2008

E-learning becomes an important part of education these days in Korea. Students had no choice but to accept the e-learning when the e-learning was used as a supplementary learning tool within a traditional class or a stand-alone distance education. This study focuses on the students' intention of e-learning acceptance for voluntary studies. In voluntary study, students have the rights to adopt the e-learning or not for their personal study. We used individual characteristics as the external variables of TAM to explain user acceptance of e-learning for voluntary studies and examined the effect of individual characteristics on user's beliefs. Research model and nine hypotheses were set up to identify the relationships among these variables based on investigations of previous researches. The theoretical model is tested with questionnaires from 420 users who accept e-learning for voluntary studies. We tested the measurement and research models by applying a structural equation modeling(SEM) approach, using the AMOS 5.0. Overall, the results provided support for the model as explaining acceptance of an e-learning system. Most path coefficients in the research model were found statistically significant. The results showed usefulness and enjoyment and subject norm were the factors affecting attitude of students using e-learning. In addition, usefulness and subject norm were the factors affecting intention of students using e-learning. The results show innovation and self-efficacy have a significant impact on user's perception of ease of use. Self-efficacy also have significant effects on user's perception of usefulness.

• 한국정밀공학회지
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• 제23권4호
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• pp.83-90
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• 2006

A robot manipulator is usually operated in two modes: free and constrained motion modes, depending on whether the robot is in contact with an environment or not. At the moment of contact, an impact occurs and can exert harmful effects to the robot or the object. In case of teleoperation, since a user may give an inadequately excessive velocity command to the slave due to insufficient visual information, the robot nay collide the object with an excessive speed and it possibly deteriorates the robot's performance causing vibrations and at worst, shortens its lifetime by its fracture. In this article, a new algorithm is proposed by introducing a command signal modification method on the basis of impedance control and validity of the proposed algorithm is demonstrated by performing simulations and experiments.

• 한국콘텐츠학회논문지
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• 제16권2호
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• pp.480-493
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• 2016

최근 들어 사회적인 상호작용 방식이 동영상을 통해 정보를 주고받는 방식으로 변하고 있다. 그래서 본 연구에서는 '나'와 '다른 사람'의 영상을 구성요소로 하는 새로운 소셜 비디오 플랫폼을 제안하고자 한다. '다른 사람'의 개성(Personality)과 '나'의 개성이 '나'에게 어떤 영향을 주는지 알아보고, 2가지 요소를 어떻게 나타내주어야 하는지 알아보기 위해 사회적 영향 이론(Social Impact Theory)과 자기 점검 이론(Self-Monitoring Theory)을 적용하여 영상을 시청하는 '나'의 개성과 '다른 사람'의 개성이 사용자의 긍정성과 소속감에 어떤 영향을 미치는지 알아보았다. 그리고 이를 실증적으로 검증하기 위해 실제 소셜 비디오 플랫폼을 구축하여 실험을 진행하였다. 그 결과, 사용자들은 자신의 영상이 화면에 제시되었을 때, 긍정성을 더 많이 느끼는 것을 확인하였다. 하지만 자신의 영상이 함께 제시되면서, 주변영상에 나타난 다른 사람들의 모습이 여성성이 높아질수록 오히려 느끼는 긍정성은 줄어드는 것으로 확인되었다. 또한 다른 사람들의 모습이 남성성이 높을 때, 사용자는 소속감을 더 크게 느끼는 것을 확인하였다. 본 연구 결과를 통해 새로운 소셜 비디오 플랫폼의 구성과 형태에 대한 시사점을 제공할 수 있을 것으로 보인다.

• 한국실내디자인학회논문집
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• 제24권4호
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• pp.152-160
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• 2015

This paper proposes high quality of healthcare environments for a user-oriented children's hospital by identifying the user needs according to residential characteristics of the child, especially the hospitalization period. Caregivers, mostly parents of children in a children's hospital, participated in a questionnaire survey. The user's demands, satisfaction and hospital environment assessment were measured. A total of 103 copies of the questionnaire were finally collected and analyzed. The data was processed statistically using SPSS WIN 18.0 Version software. The results and conclusions are as follows. 1)The participants were categorized into three groups according to the hospitalization period of the child (less than 7 days, 7-20 days, and more than 21 days). 2)When the patients stayed longer in the hospital, their satisfaction was lower and their demands were higher. The long-term group required a more spacious bathroom for the child inpatients and their caregivers as well as sufficient individual storage spaces that are appropriate for the length of stay. 3)The longer they were hospitalized, the more negative they evaluated the hospital environment. These results suggest that the period of hospitalization is one of the crucial factors that impact the user's satisfaction and demands. Therefore, it is necessary to identify the design factors such as territoriality, privacy, accessability, and aesthetics to improve the satisfaction of the long-term child inpatients and their caregivers.

• 한국환경생태학회지
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• 제6권1호
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• pp.44-54
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• 1992

한라산 영실의 오백나한-윗세오름대피소-방아오름에 이르는 아고산대(해발 1,440-1,700m)삼림의 식물군집 구조분석을 위하여 37개소에 조사구(1개 조사구당 10 $\times$ l0m 방형구 1개씩 설치)를 설치하고 식생조사를 실시하여 얻은 자료에 대하여 TWINSPAN에 의한 classification 및 ordination의 종류인 RA및 DCA기법을 적용하여 분석하였다. 또한 가축방목과 이용객에 의한 식생훼손을 파악하기 위하여 17개소에 조사구를 설치하였다. TWIMSPAN에 의해 5개의 군집으로 분리되어 구상나무-주목군집, 산철쪽-털진달래 -제주조릿대군집, 큰꽝꽝나무-보리수나무-제주조릿대군집, 산철쭉-눈향나무-털진달래군집, 시로미-눈향나무군집으로 나뉘었다. 가축방목과 탐방객의 이용에 의하여 식물군집의 종다양성이 심하게 감소되었다.

• 지능정보연구
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• 제29권4호
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• pp.111-127
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• 2023

본 연구는ChatGPT 사용의 사용자 인식에 대한 연구로, 사용자 정책기대와 사용자 혁신성이 ChatGPT 기술수용과 사용의도에 미치는 영향 관계를 TRA(Theory of Reasoned Action) 등의 변수들을 활용하여 분석하는 것을 목표로 하였다. 정책기대, 사용자 혁신성이 유용성과 쾌락적 동기를 매개하여서 사용의도에 미치는 영향과 주관적 규범이 유용성과 사용의도에 미치는 영향을 연령변수를 이용하여서 MZ세대와 비 MZ세대로 구분하여 분석하였으며, 연령별 차이가 정책기대와 상호작용하여서 유용성에 미치는 영향에 조절효과가 있는지 검증하였다. PLS(Partial Least Square) 구조 방정식과 SPSS Package를 이용하여 ChatGPT사용자 300명을 대상으로 Online 설문을 실시하고, PLS와 SPSS을 통해 통계 분석을 수행하였다. 분석 결과에 따르면, 초기 사용자의 혁신성이 높을수록 ChatGPT 사용의도가 높아진다는 것을 확인하였다. 그리고, MZ세대와 비MZ세대의 차이를 비교한 조절효과분석에서는 정책기대가 ChatGPT사용의 유용성에 부(-)의 영향을 미치는 효과를 보였다.

• 한국정보시스템학회지:정보시스템연구
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• 제12권1호
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• pp.19-45
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• 2003

The ERP system comes to existence in the period of change. In other words, the ERP system is adopted to the company with BPR project. In general, the ERP system is introduced to companies as packages rather than in-housing systems. There are several researches in IS literatures which have a conclusion that organizational context affects the performance of ERP system. This study attempts to review the organizational context from the prospective of organizational structure and change management. Regarding the organizational structure, we choose some widely known variables such as the degree of formalization and centralization. For the analysis of change management, we set the variables, which are the most importantly considered, such as the power of CEO's promotion and user participation. The extent of customizing is introduced as moderating variables between the organizational context and the implementation performance. With collected data, we performed the reliability test, the factor analysis and the regression analysis. In summary, the introduction of an information system such as ERP system has a behavioral and organizational impact. The organizational change may breed resistance and opposition and can lead to the failure of the system. Therefore, implementation of the system requires careful change management, active involvement of users and high level of management support.