• 정보처리학회논문지C
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• 제16C권5호
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• pp.645-652
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• 2009

모바일 환경에서 사용자의 위치를 기반으로 각종 정보나 서비스를 제공하는 위치 기반 서비스는 향후 정보 통신 산업의 핵심 응용으로 예상되고 있다. 위치 기반 서비스의 요소 기술로는 위치 측위 기술, 플랫폼 기술, 응용 서비스를 들 수 있다. 위치 측위 기술은 전송된 무선 신호를 측정 및 가공함으로써 측위 대상 단말기의 위치를 예측하는 기술이다. 본 논문에서는 IEEE 802.15.4 기반 환경에서 실내 측위 시스템 구축을 위한 적응력있는 위치 측위 기법을 제안한다. 제안 기법은 RSS(Received Signal Strength)를 이용한 삼각법 측위 시스템에서 위치 측위 정확도를 극대화할 수 있는 최적의 기준 AP를 선택하는 기법과 단말기 주변 전파 환경의 변화에 적응력있게 대처할 수 있는 단말기와 기준 AP사이의 거리 예측 기법으로 구성된다. 실내 측위 시스템을 실제로 구축함으로써 측위 정확도 측면에서의 제안 기법 성능을 검증하였다.

• International Journal of Knowledge Content Development & Technology
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• 제3권1호
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• pp.31-63
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• 2013

The goal of this study is to improve the competitiveness of professional librarians in society. To this end, we analyzed domestic and international LIS curriculum, determined demand from field librarians through a survey, carried out job analysis by library types, and developed an operating model for LIS curriculum by synthesizing all of these results. Finally, we suggested a course of study for civil service librarians based on this model. As a result, the six required courses for civil service librarians are: Introduction to Library and Information Science, Information Organization, Information Services (Reference and Information Services), Library Management, Information Retrieval, and Field Work. The four core courses for the civil service concentration are: Collection Development, Information Sources by Subjects, Public Library Management, and Digital Libraries. Suggested electives best suited to this career path include Using Web Resources, Information Literacy, Information Services in Culturally Diverse Communities, Library Marketing, Libraries and Cultural Programs, Reading Guidance, Library History, Small Library Management, Studies in Library Buildings, Library Cooperation, Managing Digital Collections, and Information and Communication in a Digital Age.

• 한국문헌정보학회지
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• 제38권2호
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• pp.261-289
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• 2004

도서관에서 제공되는 이용자를 위한 참고정보서비스 중 안내(guidance)서비스에 대한 연구가 국내에서는 아직 많이 이루어지지 않고 있다. 본 논문에서는 요즈음 다시 그 중요성이 강조되고 있는 안내서비스의 한 분야인 성인독자를 위한 독자자문서비스의 이론적 배경과 기본기술을 문헌조사를 통해 제시함으로써 이용자 서비스 확대, 독서장려, 도서관직원 교육, 문헌정보학 교과과정 개발에 참고할 수 있도록 하였다.

• 대한수의학회지
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• 제39권2호
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• pp.257-266
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• 1999

Ivermectin is a widely used broad spectrum antiparasitic agent in veterinary medicine. In this work, we examined the pharmacokinetic parameters and the tissue residue profile of a new injectable formulation of ivermectin developed for pigs. The plasma ivermectin levels reached the peak at about 9 and 2 hours after the administrations in young and adult pigs, respectively. But the elimination half-life (3-3.5 days) and the $C_{max}$ values (24~28 ng/ml) were not significantly different between young and adult pig groups. When compared to the reference formulation, the $C_{max}$ of test formulation was higher and $T_{1/2}$ values were shorter than those of the reference formulation, respectively. The tissue residue levels were dose- and time-dependent and were higher in the liver and fat, than in the other tissues such as the injection sites, the kidney, intestine, muscle, plasma (4~74 ng/g) at the 7th day after the administration of both formulations of ivermectin. Then, the mean tissue ivermectin levels at the 21st day after the administration in all the tissues decreased to 7.4 and 25% of the 7th day levels in the test and reference formulations, respectively. In general, the tissue levels of ivermectin in the animals treated with the test formulation decreased more rapidly than those with the reference formulation. The tissue to plasma distribution ratio (T/P ratio) of ivermectin was higher in the liver and fat than other tissues. The T/P ratio in the liver of animals treated with the test formulation was somewhat higher than that in the animals treated with the reference formulation. Taken together, the results of pharmacokinetic and tissue residue studies indicate that the test formulation of ivermectin for subcutaneous injection is comparable to the reference formulation, but unique in that it has higher peak plasma concentrations, shorter elimination half-life and higher T/P ratio in the liver than the reference formulation.

• 무역상무연구
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• 제53권
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• pp.265-288
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• 2012

Trade in service, which deals with intangible product, is distinguished from trade of goods for tangible product. The current multilateral service trade is based on GATS which includes MFN, securing the predictability as well as transparency of related service rules, specific commitment basis market access national treatment. Recently the WTO service disputes are increasing according to the frequent filing complaints against the regulation of service trade in China. The rules of GATS are not as strict as those of GATT. The commitment schedules, which were materialized between members, gets binding effect through the obligatory provisions of GATS. The GATS is inseparable relation with the Appendix of finance, of telecommunication, and of air transport, with the schedules of commitment of member states, and with the reference paper to the 4th protocol. GATS article XIV which is the general exception of GATS has a similar structure of GATT article XX. Based on the possibility of filing to the WTO, there is a need to examine whether the whole rules, regulation, and policy international trade in service of Korea perfectly macthed with the GATS. Korea with poor resources should take up the more positive attitude for the opening of international service market. According to the reciprocal aspects of concession, if Korea doesn't open a service market, the other WTO member country wouldn't allow Korea to access the their market as well as national treatment.

• Wind and Structures
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• 제8권6호
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• pp.389-406
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• 2005

The results of reference wind speed calculation in Croatia as a base for the revision of the Croatian standards for wind loads upon structures are presented. Wind speed averaged over 10 minutes, at 10 m height, in a flat, open terrain, with a 50-year mean return period is given for 27 meteorological stations in Croatia. It is shown that the greatest part of Croatia is covered with expected reference wind speeds up to 25 m/s. Exceptions are stations with specific anemometer location open to the bura wind which is accelerated due to the channelling effects of local orography and the nearby mountain passes where the expected reference wind speed ranges between 38 m/s and 55 m/s. The methodology for unifying all available information from wind measurements regardless of the averaging period is discussed by analysing wind speed variability at the meteorological station in Hvar.

• 한국세라믹학회지
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• 제18권4호
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• pp.247-256
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• 1981

Silica bricks had been in arc-furnace roofs of various sizes and steelmaking practices. The resulting materials were examined with reference to mineral and chemical changes. Silica bricks develope definite zones while in service. These zones represent a concentration gradient through the brick that results from the thermal gradient across the brick and from the furnace atmosphere. There are major brick losses by spalling as well as by melting of the hot-face surface in an iron-oxide rich liquid.

• 한국IT서비스학회지
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• 제15권1호
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• pp.269-287
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• 2016

In general, service failure occurs inevitably and the customers who experienced the greater dissatisfaction have the higher expectations of service recovery. However, most of the previous studies have focused on the evaluation and risk factors of pre-service quality. Thus, this study is contrary to the numerous previous studies and focus on the effectiveness of mobile application advertisement users' perceived perception on service recovery after service fails. A research model presented in this study is based on the Equity Theory and deeply evaluated the effectiveness of Distributive Justice, Interactional Justice, and Authenticity Relevance on Service Recovery. The survey of this study was conducted among 286 users who have experienced a services recovery of mobile application advertising. As a result, among all the factors of users of mobile application advertising, Distributive Justice, Interactive Justice, and Relevance have a positive impact to Satisfaction. In addition, Distributive Justice, Authenticity and Satisfaction also have a positive impact to Trust. Ultimately, Satisfaction and Trust have a positive impact to Service Recovery. The results of this study are expected as a reference for presenting a new business model for mobile application advertising industry, reducing business risk and enriching the related researches.

• 한국정보통신학회논문지
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• 제14권4호
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• pp.1015-1022
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• 2010

USN(Ubiquitous Sensor Network) 환경은 상황 인식 컴퓨팅을 통해 센서에서 실시간으로 측정된 정보를 응용 서비스들에게 전달하여 서비스를 제공한다. 그러나 국내 서비스 환경은 응용 서비스를 제공하는 제공자와 사용자간의 서비스 플랫폼 아키텍처에 대한 연구가 대부분이며, 센서를 통해 감지된 정보를 처리하는 제공자간의 표준 서비스 플랫폼 아키텍처 연구는 미약한 수준이다. 이에 본 논문에서는 센서 응용 및 미들웨어 부분에서의 표준화된 플랫폼 기술을 위해 OGC(Open Geospatial Consortium)의 SWE(Sensor Web Enablement)를 구성하는 관련 표준 분석 및 국내 표준 연구 분석을 통한 새로운 서비스 아키텍처 제안 및 기존 국내 시스템과의 연동을 위한 제공자 측면의 각 콤포넌트 설계 및 구현을 하였다.

• Journal of Communications and Networks
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• 제15권2호
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• pp.228-239
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• 2013

Peer-to-peer (P2P) systems have proved the most effective and popular file sharing applications in recent years. Previous studies mainly focused on equal service and differentiated service strategies when peers have no initial data before their downloads. For an upload-constrained P2P file sharing system, we model both the equal service process and the differentiated service process when the initial data distribution of peers satisfies some special conditions. Moreover, we show how to minimize the time required to distribute the file to any number of peers. The proposed fluid-based models can reveal the intrinsic relations among the initial data amount, the peer set size, and the minimum last finish time. The closed-form expressions derived from the extended models can closely approximate chunk-based models and systems, especially for relatively large files. As an application of the extended models, we show how to provide differentiated service efficiently to multiple peer sets. Since no limits are imposed on the upload bandwidth of peers or the size of each peer set, we believe that our analytic process and the results achieved can provide not only fundamental insights into bandwidth allocation and data scheduling but also a helpful reference for both improving system performance and building an effective incentive mechanism for P2P file sharing systems.