• 한국IT서비스학회지
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• 제11권2호
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• pp.1-17
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• 2012

This study based on DeLone and McLean's IS success model aims to identify mobile office service factors affecting user satisfaction. The result of analysis showed that user satisfaction was positively related to job performance, and mobility and information quality affects user satisfaction. In addition to that, we carried out separated hypotheses test to investigate mobile office service factors depending on usage(frequently used functions) and job characteristics classified generally as either primary or support activities. As a result of this research, somewhat different results were derived. The main results of this study are that mobility is the most important factor affecting user satisfaction, and mobile office services should be more strictly guaranteed in quality especially if it supports primary activities of customer companies such as sales.

• 한국IT서비스학회지
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• 제18권3호
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• pp.95-115
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• 2019

In recent years, social media that has emerged with the development of network technology has changed the channels of information dissemination. The social Q&A community is a platform for knowledge-sharing activities in a question-and-answer manner based on Web 2.0. In knowledge-sharing activities, valuable new knowledge continues to be produced and will surely bring great benefits to individuals or businesses. In the social Q&A community, the user's subjective factors play a crucial role in influencing the user's continued use and participation in knowledge-sharing activities. In order for users to actively participate in knowledge-sharing activities in the community, it needs to grasp their subjective ideas. This study explores the issue of sharing knowledge by users of the social Q&A community "Zhihu", or how to drive community revitalization efforts from these. The three factors self-efficacy, self-development motivation, and social comparison tendencies were derived, and identify their relationship with knowledge-sharing activities and community-boosting efforts through empirical analysis. In addition, the influence of knowledge acquisition on knowledge provision was investigated through sense of reciprocity. Implications of the study findings and the future research directions were also discussed.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권9호
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• pp.3444-3457
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• 2021

In the field of anti-jamming based on dynamic spectrum, most methods try to improve the ability to avoid jamming and seldom consider whether the jammer would perceive the user's signal. Although these existing methods work in some anti-jamming scenarios, their long-term performance may be depressed when intelligent jammers can learn user's waveform or decision information from user's historical activities. Hence, we proposed a hidden anti-jamming method to address this problem by reducing the jammer's sense probability. In the proposed method, the action correlation between the user and the jammer is used to evaluate the hiding effect of the user's actions. And a deep reinforcement learning framework, including specific action correlation calculation and iteration learning algorithm, is designed to maximize the hiding and communication performance of the user synchronously. The simulation result shows that the algorithm proposed reduces the jammer's sense probability significantly and improves the user's anti-jamming performance slightly compared to the existing algorithms based on jamming avoidance.

• Industrial Engineering and Management Systems
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• 제10권3호
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• pp.191-196
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• 2011

The purpose of this paper is to study user's involvement in new product development (NPD). It seeks to identify the factors involving user and design practices in the design process of new product development. A survey was conducted on 20 respondents consisting of designers involved in product development from various industries. The study focused on the early activities of the product design process which is called product specification. The analysis performed considers the importance of involving users in design decision. The outcome of this research is the significance of involving users and its effect on product development activities. The research also provides a model for an integrated user, designer and product knowledge activity in the product development process.

• 디지털융복합연구
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• 제19권2호
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• pp.373-378
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• 2021

이 연구는 최근 증가하는 레저활동에서 사용되는 액션캠의 기능에 관한 사용자 경험 디자인 연구이다. 사용하기 편리하게 발전하는 동영상 플랫폼과 함께 액션캠의 시장규모도 함께 커지고 있다. 하지만, 어떤 기능의 품질이 사용자 경험을 높여 주는지에 관한 연구가 미비하다. 따라서 카노 모델(Kano Model)의 분석 방법과 심층 인터뷰를 실행하여 사용자 경험 요소에 따른 액션캠 기능을 분류하였고, 기능별로 만족도 조사를 진행하여 액션캠의 기능에 따른 품질의 정도가 사용자의 경험에 어떠한 영향을 미치는지 분석하였다. 연구 결과, 어떤 기능이 먼저 개선되어야 하고, 또한 어떤 기능이 지속적인 연구와 투자가 이루어져야 하는지를 알 수 있었다. 본 연구가 사용자 중심의 액션캠 개발 시 유용한 정보로 활용되기를 기대한다.

• 지식경영연구
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• 제9권2호
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• pp.15-34
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• 2008

The firm leading community that is built to achieve firm's ad hoc purpose has two interested parties, operator and user. The success of the firm leading community, therefore, can be driven by meeting the needs of both parties. Most studies of the community, however, have focused not on operator but on user so far. This study identifies two variables-operating activities and organizational support-as success factors of firm leading community based on prior studies and analyzes them in term of the operator of firm leading community through 2nd in-depth interview. The result of study shows that organizational support affects operating activities and then both operating activities and organizational support affect the success of the firm leading community.

• 경영과학
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• 제19권2호
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• pp.169-178
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• 2002

The growth of Internet usage even accelerated by the spread of high-speed Internet access network such as ADSI is affecting our socioeconomic activities and culture in a great way. Korea is recently reported to be the number one high-speed Internet network subscription per 100 people in the world. In a way to reflect this situation, we collect a moderate size of sample proportional to the population of each region across country and investigate what factors might explain the level of user's dissatisfaction with respect to Internet service they have been receiving. The results indicate that the set of gender, age, Internet usage, service kinds, incoming e-mails, and e-shopping is significantly influencing user's dissatisfaction, in that dissatisfaction is measured in 11 perspectives. In particular, user's age, gender, and e-shopping experiences are considered to be mostly explainable.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2012년도 한국컴퓨터종합학술대회논문집 Vol.39 No.1(B)
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• pp.339-341
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• 2012

This paper presents a method for generating an autonomous activity-based diary in the environment including a personal computer (PC). In order to record a user's various tasks in front of a PC, we consider the contextual information such as current time, opened programs, and user interactions. As one modality for the user interaction, a motion sensor was applied to recognize a user's hand gestures in case that the activity is conducted without interaction between the user and the PC. Moreover, we propose a temporal clustering method to recapitulate the sequential and meaningful activity in the stream of extracted PC usage logs. By combining those two processes, we summarize the user activities in the PC environment.

• International Journal of Computer Science & Network Security
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• 제21권2호
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• pp.221-228
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• 2021

Recent improvements on the quality, fidelity and availability of biometric data have led to effective human physical activity detection (HPAD) in real time which adds significant value to applications such as human behavior identification, healthcare monitoring, and user authentication. Current approaches usually use machine-learning techniques for human physical activity recognition based on the data collected from wearable accelerometer sensor from a single wearable smart device on the user. However, collecting data from a single wearable smart device may not provide the complete user activity data as it is usually attached to only single part of the user's body. In addition, in case of the absence of the single sensor, then no data can be collected. Hence, in this paper, a continuous HPAD will be presented to effectively perform user activity detection with mobile service infrastructure using multiple wearable smart devices, namely smartphone and smartwatch placed in various locations on user's body for more accurate HPAD. A case study on a comprehensive dataset of classified human physical activities with our HAPD approach shows substantial improvement in HPAD accuracy.

• 한국산업정보학회논문지
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• 제16권3호
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• pp.35-45
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• 2011

전 국민의 인터넷 이용율 향상과 유비쿼터스 기술의 확산으로 인터넷 중독은 심각한 사회문제가 되고 있다. 하지만, 한국형 성인 인터넷 중독 자가진단 척도인 K-척도는 사용자의 특성을 구분하지 않는 일반적인 진단법이다. 본 연구에서는 사용자의 직무 연관 또는 직무와 무관하게 웹사이트에 접속하는 기본적인 인터넷 이용 패턴을 취득하는 설문조사를 통하여 사용자의 직무 무관한 인터넷 활동을 기반으로 인터넷 중독을 진단하는 새로운 방법을 제안하고자 한다. 솔직하게 인터넷 중독 문항에 표시하는 것을 꺼리는 인터넷 이용자에게 기본적인 인터넷 이용 패턴만 요구하여 K-척도에서 발견되지 않는 숨겨진 인터넷 중독자를 찾을 수 있음을 SPSS 통계 분석 도구로 제시한다.