• 한국언론정보학보
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• 제60권
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• pp.150-171
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• 2012

SNS 이용자를 대상으로 한 온라인 서베이 결과, SNS 이용자의 이용동기는 '정보', '참여', '교류'로 추출됐다. SNS 이용동기에 따른 SNS 이용 여부에서 SNS 이용동기는 해당 SNS의 특성을 잘 설명하는 것으로 나타났다. 정보를 얻는 것이 목적인 SNS 이용자는 '트위터'와 '미투데이'와 같은 소통 중심 SNS를 더 많이 이용했다. SNS에 참여하는 것이 목적인 SNS 이용자는 가장 많은 가입자를 확보하고 있는 '싸이월드'를 더 많이 이용했다. 다른 사람과 교류하는 것이 목적인 SNS 이용자는 관계 중심 SNS인 '페이스북'과 '싸이월드'를 더 많이 이용한 것으로 나타났다. 이러한 경향은 SNS 이용동기에 따른 SNS 이용시간 및 접속횟수에서도 비슷하게 나타났다. 한편 정보를 얻고 다른 사람과의 교류를 하는 것이 목적인 SNS 이용자는 SNS 메시지를 긍정적으로 평가하는 반면에, SNS에 참여하는 것이 목적인 SNS 이용자는 부정적으로 인식하는 경향이 있었다. 이는 SNS의 이용동기에 따라 SNS 메시지에 대한 인식이 달라질 수 있다는 것을 확인시켜 준다.

• 한국콘텐츠학회논문지
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• 제16권4호
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• pp.434-441
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• 2016

본 연구에서는 빅데이터 분석기법을 이용하여 트위터 이용자들을 대상으로 언어에 따른 자기노출과 경계불투과성에 대한 양상을 파악하였다. 6개월 동안 5천4백만 명의 트위터 이용자가 작성한 4억여 개의 트윗을 수집하였으며, 이들 중 트윗 수 상위 10개 언어권 이용자의 프로파일 및 관련 데이터를 조사하였다. 이를 통해 트위터 이용자의 언어가 이용자 프로파일, 프로파일 이미지, 지리정보, URL, 사용자 설명 등 자기정보 공개 항목의 공개비율과 경계불투과성에 미치는 영향을 분석하였다. 분석결과, 경계 불투과성과 자기노출 비율(프로파일, 프로파일 이미지, URL, 이용자 설명, 지리정보)은 언어권에 따라 각각 통계적으로 유의한(p<0.001) 차이가 있는 것으로 나타났다. 자기노출 비율과 평균 점수는 포르투갈어, 인도네시아어 및 스페인어 이용자가 아랍어, 일본어, 터키어, 한국어 이용자에 비해 높은 것으로 파악되었다. 또한 리트윗을 포함한 트윗 수가 많은 이용자일수록 경계 불투과성이 높아지는 것으로 나타났다.

• 한국정보시스템학회지:정보시스템연구
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• 제23권3호
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• pp.1-23
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• 2014

Nowadays, smartphones have become a portable multimedia computer because of a variety of useful applications in our daily lives, which can be downloaded and installed easily in smartphones. Despite of the fact that, however in the IS literature there has been little research on smartphone applications' user interface design. Specifically, there has been little understanding about smartphone users' cognitive functions as a mediating variable in the relationship between the user interface design of smartphone applications and users' work performance with the applications. Thus, the research aims of this study are to examine 1) the effects of the user interface design attributes including simplicity, consistency, and metaphor on the compliance with or the extension of users' mental models representing users' cognitive functions, and 2) the effects of the users' cognitive functions on their work performance with the applications. A survey was conducted and Structural Equation Modeling(SEM) was employed to analyze the data. The results of this study showed that two of the user interface design attributes, simplicity and consistency, strongly affected users' cognitive functions. In addition, users' cognitive functions significantly influenced users' work performance. However, there was no relationship between the metaphors in the user interfaces of smartphone applications and the compliance with users' mental model. This study contributed theoretically not only to explore users' mental models that are rarely investigated in the IS field, but also to add some findings related to users' cognitive functions to the IS literature. This study also can help practitioners to develop more user friendly user interfaces of smartphone applications by suggesting the design attributes, such as simplicity, consistency, and metaphor.

• 디지털융복합연구
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• 제18권10호
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• pp.381-387
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• 2020

본 연구는 국내 무인 편의점에서 중국과 한국인의 사용자 경험을 측정하는 것에 목적이 있다. 따라서 본 연구대상인 이마트24 셀프스토어 김포DC점을 경험한 적 있는 중국인과 한국인 사용자를 대상으로 심층 인터뷰를 실시하였다. 인터뷰는 피터 모빌의 허니콤 모델의 7가지 원칙에 따라 설정했다. 연구 결과, 중국인 사용자의 만족도는 한국인 사용자보다 높은 것을 알 수 있었다. 인간미를 중시하지만, 더 빠른 속도를 추구하는 사회문화의 영향으로 한국인 사용자는 이마트24 셀프스토어에 큰 불편함을 느끼는 반면, 중국인 사용자는 외국인 사용자를 거의 고려하지 않는 시스템이 다소 문제점으로 제기되었다. 이 연구는 이마트24 셀프스토어가 더 많은 문화적 배경을 가진 사용자를 만족시키는데 도움이 될 것으로 기대한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권1호
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• pp.58-73
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• 2021

Cloud Service Providers (CSPs) enable their users to access Cloud computing and storage services from anywhere in quick and flexible manners through the Internet. With the basis of 'pay-as-you-go' model, it makes the interactions between CSPs and the users play a vital role in shaping the Cloud computing market. A pool of virtualized and dynamically scalable Cloud services that delivered on demand to the users is associated with guaranteed performance and cost-provisioning. It needed a costing scheme for determining suitable charges in order to secure lease pricing of the Cloud services. However, it is hard to meet the satisfied prices for both CSPs and users due to their conflicting needs. Furthermore, there is lack of Service Level Agreements (SLAs) that allowing the users to take part into price negotiating process. The users may lose their interest to use Cloud services while reducing CSPs profit. Therefore, this paper proposes a generic costing scheme for Cloud services using General Equilibrium Theory (GET). GET helps to formulate the price function for various services' factors to match with various demands from the users. It is initially determined by identifying the market circumstances that a general equilibrium will be hold and reached. Specifically, there are two procedures of agreement made in response to (i) established equilibrium supply and demand, and (ii) service price formed and constructed in a price range. The SLAs in our costing scheme is integrated to satisfy both CSPs and users' needs while minimizing their conflicts. The price ranging strategy is deliberated to provide prices' options to the users with respect their budget limit. Meanwhile, the CSPs can adaptively charge based on users' preferences without losing their profit. The costing scheme is testable and analyzed in multi-tenant computing environments. The results from our simulation experiments demonstrate that the proposed costing scheme provides better users' satisfaction while fostering fairness pricing in the Cloud market.

• Journal of Communications and Networks
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• 제11권2호
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• pp.175-186
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• 2009

A new medium access control (MAC) scheme embedding physical channels into multiband carrier sense multiple access/collision avoidance (CSMA/CA) networks is proposed to provide strict quality of service (QoS) guarantee to high priority users. In the proposed scheme, two priority classes of users, primary and secondary users, are supported. For primary users physical channels are provided to ensure strict QoS, whereas secondary users are provided with best-effort service using CSMA/CA modified for multiband operation. The performance of the proposed MAC scheme is investigated using a new multiband CSMA/CA Markov chain model capturing the primary user activity and the operation of secondary users in multiple bands. The throughput of secondary users is obtained as a function of the primary user activity and other CSMA/CA parameters. It is shown that the new MAC scheme yields larger throughput than the conventional single-band CSMA/CA when both schemes use the same bandwidth.

• 대한안전경영과학회지
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• 제2권4호
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• pp.139-151
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• 2000

Developing a new commercial product, it is need to connect the end users demand of quality to the industrial technology of company. For this reason, this study is to build up the users demand for the imminent marketing product of a certain company by Analytic Hierarchy Process, analyze quantitatively users subjective thoughts collected by Group Consensus, calculate the added-value of users demands and verify the consistency of users opinions by consistency-exponential-calculation. The added value obtained by this method is substituted into a user-demand item of Quality Function Deployment. And, the technical characteristic data transferred from the extracted essential factor for developing and manufacturing a new product is substituted into a technical characteristic item of QFD. The faculty of quality is firstly finished by this procedure. But, because the relation a technical characterization with users demand do not be known in new product, Wassermans method was introduced for the correlation users demand with technology and for the processing and marketing of a new product. The all assumption on this thesis was based on the reliable real data of a certain company.

• 한국도서관정보학회지
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• 제24권
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• pp.81-106
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• 1996

Without an accurate understanding of information needs of library users, an efficient services can't be implement. And we can expect that there is a difference between query statement and actual information needs of users. It also will occur difference in the process of librarian's interpretation of query statement because of an inaccurate presentation and their different working experiences. It means that there is a communication problems between users and librarians. The purpose of this study is to provide the techniques of face to face communication between users and librarians as a method of efficient library service activities. And focused on the importance of non-language communication. The effectiveness of this study are as follows: 1. With the understanding of information flow, librarians can expand the extent of library services. 2. Knowing that how to communicate with users at the a n.0, ppropriate degree, librarians can improve the communication techniques. 3. Expanding the satisfaction of information services and heitening the reliability of users. 4. From the analysis of user information needs, librarians can convert present system to the proper service-oriented system. 5. Knowing the importance of non-language communication, librarians can improve the service environment.

• 한국멀티미디어학회논문지
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• 제14권12호
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• pp.1549-1558
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• 2011

In this paper, we address the problem of bandwidth sharing among multiple primary users and multiple secondary users in a cognitive radio network. In cognitive radio networks, effective spectrum assignment for primary and secondary users is a challenge due to the available broad range of radio frequency spectrum as well as the requisition of harmonious coexistence of both users. To handle this problem, firstly, Bertrand game model is used to analyze a spectrum pricing in which multiple primary users emulate with each other to acquire maximal profit. After that, we employ Cournot game to model the spectrum sharing of secondary users to obtain optimal profit for each user also. Simulation results show that our scheme obtains optimal solution at Nash equilibrium.

• Journal of Contemporary Eastern Asia
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• 제12권1호
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• pp.65-79
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• 2013

This paper examines communication patterns of key Twitter users by considering the socially and politically controversial Sejong City issue in South Korea. The network and message data were drawn from twtkr.com. Social network-based indicators and visualization methods were used to analyze political discourse among key Twitter users over time and illustrate various types of Tweets by these users and the interconnection between these key users. In addition, the study examines general Twitter users' participation in the discussion on the issue. The results indicate that some Twitter profiles of media outlets tend to be very dominant in terms of their message output, whereas their Tweets are not likely to be circulated by other users. Noteworthy is that Twitter profiles of individuals who are geographically affiliated with the issue are likely to play an important role in the flow of communication.