• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권7호
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• pp.1346-1367
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• 2011

As the size of camera modules is decreasing and as the computing performance of portable devices is improving, taking photos has become a part of daily life. However, existing photo management programs and products that manage such photos still require extensive user effort to facilitate the sharing and browsing of images. It is especially difficult for novice users to manage and share photos. In this paper, we develop a round-robin concept-driven user preference feedback mechanism for achieving direct photo sharing, instant display, and easy management using optimized user controls and user preference-driven classification. Compared with commercial photo management systems, our proposed solution provides new features: optimized user controls, direct sharing and instant display, and user preference feedback driven classification. These new features boost the round-robin concept-driven user preference feedback. This paper proposes a photo finder that automatically searches for photos in storage spaces or cameras. The proposed photo finder relies on user preference feedback to share photos by leveraging user preferences, and the round-robin connection transmits photos to the family's digital photo frame or web album by arbiter. The proposed method saves time and spares users the effort required for photo management. Moreover, this method does not merely direct photo sharing and simple photo management, but it also increases the satisfaction level of users viewing the photos.

• 한국컴퓨터정보학회논문지
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• 제19권12호
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• pp.287-298
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• 2014

본 연구에서는 SNS 공간에서 사회적 자본이 어떻게 형성되고 이용되고 있는지에 대해 규명하고, 나아가 구조적 및 관계적 사회 자본이 이용자만족도와 지속적 정보공유의도에 미치는 영향을 조사하였다. 연구결과, 사회적 상호작용 연대감(구조적 사회 자본)은 관계적 사회 자본(SNS 사이트 신뢰, SNS 이용자 신뢰 및 상호호혜성)의 주요 결정 요인으로 검증되었다. 또한 관계적 사회 자본 중 SNS 사이트 신뢰가 이용자 만족도와 관련성이 높게 나타난 반면, SNS 이용자 신뢰 및 상호호혜성은 이용자 만족도와 관련성이 없는 것으로 나타났다. 마지막으로 관계적 사회 자본 중 SNS 사이트 신뢰, 상호호혜성은 지속적 정보공유 의도 형성에 중요한 역할을 하는 것으로 나타난 반면에, SNS 이용자 신뢰는 지속적 정보공유 의도와 관련성이 없는 것으로 검증되었다. 본 연구결과는 SNS 공간에서의 사회적 자본에 대한 학문적 연구와 실무적 시사점을 제공하고 있다.

• Asia pacific journal of information systems
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• 제29권2호
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• pp.308-327
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• 2019

The concept of sharing economy has received rich attention in recent years. As a typical type of business model in the sharing economy, online short rent has been paid attention by both industry and academia. In this study, we find trust to be a critical determinant to the success of online short rent platforms. Based on three dimensions of trust theory, i.e., ability, benevolence and integrity, we investigate the factors influencing tenant' willingness to participate in online short rent. We further examine the extent to which trust can influence the number of sales and comments of rooms listed at online short-term rent platforms, which can represent tenant' willingness to participate in the sharing economy. The results show that the trust dimensions represented by a landlord's personal characteristics have significant positive correlations with the number of sales and comments. For example, the real name authentication and the sesame score can represent the trust integrity; online replay ratio and the average confirmation time representing the trust sincerity, and the order acceptance ratio representing the trust ability. On this basis, we proposed some recommendations for both platforms and landlords. For example, the landlords can improve the tenants' trust by authenticating his/her real name, replying actively and timely. For platforms, when they make housing list ranking rules, they can take the landlord's personal attributes that may affect trust into consideration. Moreover, platforms can also allow landlords to supply value-added services to improve service quality and ultimately promote the virtuous circle of the platform ecosphere. Through conducting the empirical research on a particular application of the sharing economy, we aim to fill the research gap of this field in China and provide theoretical and practical contributions to the future development of online short rent.

• Journal of Information Technology Applications and Management
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• 제22권3호
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• pp.19-33
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• 2015

SNS is perceived as an effective tool for sharing news and enabling news content to reach many more users than before. And some users think that SNS is an important source to get news. This study's purpose is to understand the key factors contributing to behavior of news consumption on social network sites in Cambodia and its influence. We identified three key factors including convenience, recency, and variety; however, recency showed less significant effect on news consumption on SNS. Besides the key factors, it also seeks to understand the impact of news consumption on social engagement and government's transparency in Cambodia. The analytical results achieved through the Partial Least Squares (PLS) approach.

• Journal of information and communication convergence engineering
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• 제7권1호
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• pp.24-29
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• 2009

Sahai and Waters first introduced the concept of Fuzzy Identity Based Encryption (FIBE) to provide an error-tolerance property for Identity Based Encryption (IBE) in 2005. Yang et al. extended this idea and introduced the concept of Fuzzy Identity Based Signature (FIBS) in 2008, and constructed a FIBS scheme based on Sahai and Waters's FIBE scheme. In this paper, we further formalize the notion and security model of FIBS scheme and propose a new construction of FIBS scheme based on bilinear pairing. The proposed FIBS scheme not only provide shorter public parameters, private key and signature, but also have useful structures which result in more efficient key extraction, signing and verification than that of Yang et al.'s FIBS scheme.

• 한국통신학회논문지
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• 제37C권9호
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• pp.821-828
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• 2012

최근 들어, 저비용의 모바일 멀티미디어 서비스를 받기 위해 사용자의 무선랜 (WLAN) 사용에 대한 요구사항이 크게 증가하고 있다. 하지만 기존의 무선랜 시스템은 Open Authentication 방법에 의한 AP에 접속함으로써 외부공격에 취약하다. 본 논문에서는 무선랜 보안키를 안전하고 효율적으로 관리하는 SNS 기반 무선랜 접근 공유 시스템을 설계 및 구현하였다. 본 논문에서 제안한 무선랜 접근 공유 모델에서 사용자들 간의 무선랜 접근 권한을 위해 사회적 신뢰강도를 제안한다.

• 한국임상약학회지
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• 제28권1호
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• pp.40-50
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• 2018

Objective: This study presented the analysis period, the complexity of combined therapy and comparator choice as the key limitations in the economic evaluation of new drugs, and discussed programs for coping with these limitations. Methods: This study evaluated the post-evaluation, risk-sharing agreement, extra funding program, and flexible incremental cost-effectiveness ratio (ICER) threshold as actions or programs that would increase accessibility to costly new drugs. The study also presented the cases of other countries. The application of the post-evaluation was considered to deal with high uncertainty regarding new drugs. Results: The risk-sharing agreement was introduced in European countries as well as South Korea and has been responsible for the shift from using the financial schemes to outcome-based schemes. The drug funding program has had troubled in securing stable extra funds. The application of higher ICER in the economic evaluation of expensive and innovative oncology drugs was criticized because of the inequity between oncology patients and patients with other diseases. Conclusion: Therefore, introducing and applying actions that would increase the accessibility to costly new drugs in South Korea have been deemed necessary after careful reviews and discussions with various stakeholders (insurer, policy makers, pharmaceutical companies and patients).

• 한국정밀공학회지
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• 제15권9호
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• pp.82-92
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• 1998

An international standard for the product model data, STEP, and a standard for the distributed object technology, CORBA, will play a very important role in the future manufacturing environment. These two technologies provide background for the sharing of product data and the integration of applications on the network. This paper describes a prototype CAD/CAE environment that is integrated on the network by STEP and CORBA. Several application servers and client software were developed to verify the proposed concept. The present CAD/CAE environments are composed of several individual software components which are not tightly integrated. They also do not utilize the rapidly expanding network and object technologies for the collaboration in the product design process. In the design process in a large organization, sharing of application resources, design data and analysis data through the network will greatly enhance the productivity. The integration between applications can be supported by two key technologies, CORBA(Common Object Request Broker Architecture) and STEP(Standard for the Exchange of Product Model Bata). The CORBA provides interoperability between applications on different machines in heterogeneous distributed environments and seamlessly interconnects distributed object systems. Moreover, if all the data in the CAD/CAE environment are based on the STEP, then we can exclude all the data conversion problems between the application systems.

• 한국자원공학회지
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• 제55권6호
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• pp.538-545
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• 2018

광해방지사업의 효율적 추진을 위해서 중장기 로드맵에 따른 체계적인 광해방지기술개발이 필요하다. 1, 2단계 로드맵에 따른 광해방지기술개발 주요성과들을 분석해본 결과 기술개발 성과공유 확산의 필요성이 제기되었다. 본 연구에서는 대내외적 기술 수요를 포괄하는 3단계 로드맵의 과제들을 점검해봄으로써, 기술개발 성과공유 확산을 통한 지속가능한 광해방지 기술개발 전략의 발전방안에 대해서 고찰하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제7권4호
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• pp.632-650
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• 2013

The paper considers a spectrum sharing cognitive radio (CR) network coexisting with a primary network under the average interference power constraint. In particular, the secondary user (SU) is assumed to carry delay-sensitive services and thus shall satisfy a given delay quality-of-service (QoS) constraint. The secondary receiver is also assumed to be equipped with multiple antennas to perform maximal ratio combining (MRC) to enhance SU performance. We investigate the effective capacity of the SU with MRC diversity under aforementioned constraints in Nakagami fading environments. Particularly, we derive the optimal power allocation to achieve the maximum effective capacity of the SU, and further derive the effective capacity in closed-form. In addition, we further obtain the closed-form expressions for the effective capacities under three widely used power and rate adaptive transmission schemes, namely, optimal simultaneous power and rate adaptation (opra), truncated channel inversion with fixed rate (tifr) and channel inversion with fixed rate without truncation (cifr). Numerical results supported by simulations are presented to consolidate our studies. The impacts on the effective capacity of various system parameters such as the number of antennas, the average interference power constraint and the delay QoS constraint are investigated in detail. It is shown that MRC diversity can significantly improve the effective capacity of the SU especially for cifr transmission scheme.