• 정보처리학회논문지C
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• 제17C권5호
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• pp.415-426
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• 2010

CAS는 정당한 사용자만이 콘텐츠를 수신할 수 있도록 하는 수신 제어 시스템으로서, 최근 각광받고 있는 IPTV 등에서도 이를 이용하고 있다. H.264/SVC는 동일한 콘텐츠를 다양한 네트워크 환경과 단말기 성능에 따라 수신할 수 있도록 하는 표준 코딩 기법이다. 이 기법은 사용자가 수신 품질을 결정할 수 있도록 콘텐츠를 계층 구조로 구성한다. 그러므로 콘텐츠 제공자는 사용자가 요금을 지불한 품질의 콘텐츠만을 수신할 수 있도록 제어할 수 있어야 한다. 현재 사용되고 있는 CAS의 구조는 H.264/SVC 콘텐츠 제어에 적합하지 않다. 본 논문에서는 CAS 구조에서 H.264/SVC 콘텐츠 접근을 효율적으로 제어하기 위한 기법과 키관리 기법을 제안한다.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2009년도 학술대회
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• pp.232-239
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• 2009

Emerging social networking services provide a new paradigm for human-to-human communication. However, these services are centralized and managed by single service provider. In this paper, we propose MicroPost, a decentralized event notification service architecture for social applications based on publish/subscribe model. In our design space, event brokers are structured as an overlay network which provides the substrate of distributed peer-to-peer lookup service for storing and retrieving subscriptions with hashed keys. Event clients interact with event brokers to publish or subscribe social messages over the wide-area network. Using XML standards, we present an efficient algorithm to forward events for rendezvous-based matching in this paper. In our design space, the cost of routing is O(${\omega}log_kN$), where N is the number of event brokers, ${\omega}$ is the number of meta-data obtained from event messages, and k is a constant, which is selected by our design, to divide the identifier space and to conquer the lookup of given key. Consequently, what we achieved is an asynchronous social messaging service architecture which is decentralized, efficient, scalable, and flexible.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2000년도 추계학술대회 및 정기총회
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• pp.125-128
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• 2000

The Internet banking service, through which customers process their banking-related works, was introduced in July 1997. The service has since spread quickly, and as of the end of June 2000, just one year after its introduction into Korea, its subscribers numbered 1.23 million people. This figure is ten times larger than the 120,000 subscribers recorded over the six months period up to the end of 1999. In addition, since the end of June 2000, subscriptions on average increase by more than 10,000 a day, and by the end of December 2000, it is expected to pass the 3 million mark. There has been no empirical study conducted on the invigorated Internet banking's status and its services. Therefore, this research is designed to conduct a survey on the Internet banking service status, to conduct actual transactions from the viewpoint of customers and then make a empirical evaluation of it. This will indicate directions for improvement and development of the domestic Internet banking service. We have evaluated ten areas of the Internet banking service including financial service, customers service, users'convenience, and system safety. As of the end of June 2000, 18 out of 20 commercial domestic banks are providing an Internet banking service, and we have conducted evaluations of all these banks. The evaluation is divided into ten categories with 100 points as a maximum score. These are then classified into six grades AAA, AA, A, BBB, BB and B. The outcome of this evaluation was featured in the major domestic journals, and the banks, acknowledging the value of the report, declared that they would adopt it as their criteria for evaluation.

• 복식
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• 제53권8호
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• pp.105-120
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• 2003

Despite the creative strengths fashion illustrations, most fashion related advertisements use photographs instead. Furthermore, there is not much study done on the effects of fashion illustrations. Through this study the authors discover the effectiveness of fashion related magazine advertisements using fashion illustrations by looking into the level of recognition due to interaction effects between advertisements using photographs and advertisements using fashion illustrations. This study, however, does not focus on comparing the different levels of recognition effect between photographs and fashion illustrations. After a literature review of magazines with high rank subscriptions, an experiments was conducted. A booklet was made using 16 fashion illustration advertisements and 16 photograph advertisements all designed to control variables other than advertisement type. Then a survey was taken using the booklet to measure the recognition levels of the different types of advertisements. Through an ANOVA test of the 2 ${\times}$ 3 factorial designed model the authors derived results implying that interaction effects do exist between the different types of advertisements. In the environment where advertisements using photographs dominate, advertisements using fashion illustrations can effectively be recognised by the consumers. Through this study, the authors wish to give guidance to decision makers in the fashion industry related to the type of printed advertisement they should seek.

• 한국도서관정보학회지
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• 제29권
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• pp.27-63
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• 1998

The purpose of this study is to analyze the document delivery service(DDS) of the academic libraries and suggest its improvement model in Korea. DDS means providing copies of information requests in any format and from any source. And DDS is gaining in importance as libraries turn to 'just-in-time' access rather than 'just-in-case' collection to meet user information needs. By good fortune, rising journal subscription prices, declining financial resources, canceling some of journal subscriptions, electronic transmission technologies, and the rise of commercial document delivery services have allowed libraries to begin to deliver articles to users in a much more rapid and acceptable time frame. Therefore, the library paradigm for the 2000s must be the creation of new document delivery structures which capitalize on the access tolls and structures created by librarians during the past generations. First of all, library-based document service requires a close review of existing library-to-library delivery mechanisms, application of technology to transfer of facsimiles of materials and facilitated use of existing fee-based document sources. The ideal document delivery system would feature a transparent, seamless electronic service incorporating searching and browsing identification and marking of desired items, and transmission and fulfillment of requests. And requested items would be supplied from library collection, commercial suppliers, or other sources. But the future of DDS will succeed when physical resources, policies, personnel, and practices are organized to provide timely information delivery to users.

• 정보관리연구
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• 제36권1호
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• pp.1-32
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• 2005

현재의 학술 커뮤니케이션 위기는 잡지의 위기가 아니라 정보 유통상의 광범위한 위기이다. 그것은 STM 학술지의 구독비용이 대학도서관의 예산 증가율을 상회함에 따라 학술 및 연구자료의 접근력이 축소되거나 상실되는 것을 의미한다. 그래서 오픈 액세스 잡지(OAJ), 저자 셀프 아카이빙(ASA), 학술기관 레포지터리(AIR)를 전략적 수단으로 하는 오픈 액세스가 대안으로 등장하였다. 이에 본 연구는 오픈 액세스의 최근 동향을 개관하고, OA 전략에 내재된 장애요소와 다양한 현안인 학술정보의 공공재 논쟁, 무료접근의 신화와 한계, 저자의 비용지불 모델, 저작권 귀속문제 등을 분석한다.

• 한국비블리아학회지
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• 제28권2호
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• pp.245-271
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• 2017

연속간행물이 공공도서관 장서로서 차지하는 중요성과 이용 빈도에 비하여 공공도서관현장에서의 연속간행물 관리에 대한 관심은 상대적으로 미흡한 편이다. 본 연구의 목적은 공공도서관의 연속간행물 장서관리 실태를 조사하여 문제점을 진단하고 개선방안을 제시하는 데 있다. 이를 위해 문헌연구와 국내 8개 지역 대표도서관 및 3개 해외 도서관의 장서관리 정책 사례 조사, 경기도 지역 31개 공공도서관을 대상으로 한 온라인 설문조사 등을 실시하였으며, 조사 결과를 토대로 구독 종수 및 범위의 확대, 접근점 개선 및 관리지침의 수립 필요성 등을 제안하였다.

• Asia pacific journal of information systems
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• 제31권4호
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• pp.606-632
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• 2021

With many consumers being exposed to news via social media platforms, news organizations are challenged to attract visitors and generate revenue during visits to their websites. They therefore need detailed information on how to write articles and headlines to increase visitors' engagement with the content to drive advertising revenues. For those news organizations whose business model depends mainly on advertisements, rather than subscriptions, it is particularly crucial to understand what makes the website attractive to their visitors, what drives users to stay on the website, and what factors affect a user's exit decision. The current research examines individual news consumers' choices to find patterns of increase or decrease in user engagement relative to a variety of topics, as well as to the mood or tone of the content. Using clickstream data from a major news organization, the authors develop a user-level dynamic model of clickstream behavior that takes into account the content of both headlines and stories that visitors read. The authors find that readers appear to exhibit state dependence in the tone of the articles that they read. They also show how the topics expressed in headlines can affect the amount of content readers consume when visiting the news organization to a much larger degree than the topics expressed in the content of the article. Online publishers can make use of such findings to present visitors with content that is likely to maintain and/or increase their engagement and consequently drive advertising revenue.

• 한국IT서비스학회지
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• 제18권5호
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• pp.165-182
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• 2019

An equity crowdfunding system of Korea has been introduced since January 25, 2016. The crowdfunding has contributed to remove the funding gap for startups in Korea. In the three years since the introduction of the system, the amount issued has been growing annually 31 percent. In 2018, the general investors who participated in equity crowdfunding, account for 93.8% of the total market size. General investors are a large part of equity crowdfunding. Investors, however, are facing the information asymmetry problems. General investors rely heavily on the investment prospectus provided by startups to obtain the information they need to determine their investment decisions. Under these circumstances, startups have the incentive to provide information that is advantageous to them, and investors are likely to be adversely affected by the investment prospectus. In this study, we collected the novel crowdfunding prospectus dataset: a total of 459 investment prospectus and conducted a morphological analysis. The analysis showed that the more positive the word, the higher the success rate of investors' subscriptions. We also compared projects that were heavily invested by general investors with projects that were heavily invested by professional investors. Then, we were able to examine that the success rates of project subscription, which were heavily invested by general investors, were higher than the projects of professional investor type. It can be interpreted as a general investor driven crowdfunding market. Based on these results, we propose three policies. First, the supervisor should be strengthened to provide more detailed information on investment risk factors in the prospectus. Second, the crowdfunding intermediary should monitor information provided by startups. Third, an investor should be asked to add a question to the investment compliance test that allows the investor to recognize the problem in the manual.

• 한국문헌정보학회지
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• 제47권4호
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• pp.187-210
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• 2013

컨소시엄을 통한 공동구매의 이점은 보다 저렴한 비용으로 많은 연구자들이 학술 연구활동에 필요한 광범위한 정보를 용이하게 획득하고 이용할 수 있게 하는 것이다. 본 연구에서는 전자저널 빅딜계약의 혜택에 대한 실증적 분석 및 검증작업을 통한 정보이용 효율성을 확인하고자 하였다. 즉, 전자저널 빅딜계약에 참가하고 있는 규모가 큰 기관과 규모가 작은 기관의 그룹 간 정보이용 효율성에 어떤 차이가 있는지를 구체적으로 규명하여 밝히는 것을 그 목적으로 하였다. 아울러 전자저널 빅딜계약 참가기관의 그룹별 정보획득과 정보이용 결과에 대한 차이를 규명함으로써 지속적으로 반복되고 있는 기관 그룹 간 차이에 대한 불만사항들을 해소하고 나아가 장기적인 안목에서 현재의 빅딜계약 방식을 대체할 수 있는 새로운 대응방안을 모색하는 실마리를 제공하고자 하였다.