• Proceedings of the Computational Structural Engineering Institute Conference
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• 1994.10a
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• pp.183-190
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• 1994

The paper provides a review of the analysis methods currently being used to perform seismic analysis of free standing high density spent fuel storage racks for PWR. On the basis of the analysis techniques obtained by KAERI from the design experience of Yonggwang unit 3&4 and Ulchin unit 3&4, the analysis procedure and modeling methods are discussed. The analysis of free standing fuel racks requires consideration of complex phenomena such as hydrodynamic coupling, impact through gap between fuel assembly and poison box and racks, frictional effect, rigid body sliding and tipping and etc. The present modeling of these factors is reviewed in comparison with the recommendation of regulatory group. Further improvement of analysis method and the current issues for the development are discussed.

• 한국경영정보학회:학술대회논문집
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• 2008.06a
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• pp.153-170
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• 2008

Customers' needs change every moment. Profitability of stores can't be increased anymore with an existing standardized chain store management. Accordingly, a personalized store management tool needs through prediction of customers' preference. In this study, we propose a recommending procedure using dynamic customers' preference by analyzing the transaction database. We utilize self-organizing map algorithm and association rule mining which are applied to cluster the chain stores and explore purchase sequence of customers. We demonstrate that the proposed methodology makes an effect on recommendation of products in the market which is characterized by a fast fashion and a short product life cycle.

• Proceedings of the KWS Conference
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• v.43
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• pp.275-277
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• 2004

Fictitious notch radius approach is based on the Neuter's microstructural support hypothesis which assumes that fatigue crack is governed by highly stressed volume of the material right on the weld toe area rather than the surface stress at a pin point of weld toe area. Variety of successes have been achieved in applying this methodology to the fatigue of welded joint, hence, it became one of recommended design procedure in IIW's recommendation as well as many ship classification societies. 1mm fictitious notch radius approach was applied to the various fatigue problems of welded joints in this study covering the effect of weld size, notch stress calculation for 3D geometry and low cycle fatigue problem. It was found that fictitious notch radius approach fumed out to be very effective and accurate in dealing with fatigue strength of welded joint.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.7
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• pp.4025-4032
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• 2013

Objectives: Colorectal cancer (CRC) is the most commonly diagnosed cancer for all US populations including Asian Americans. CRC screening has considerable benefits to prevent CRC and reduce mortality. The purpose of this article was to review the published literature on rates of colorectal cancer screening and factors associated with colorectal cancer screening practice among Asian Americans. Methods: Through searching electronic reference databases from 2000 to 2013, 30 articles were found on Chinese, Filipino, Japanese, Korean, and Vietnamese Americans. Findings: Asian Americans had significantly low ratesfor CRC screening; Korean Americans reported the lowest rates, while higher screening rates were found among Japanese Americans. Older age, longer length of stay in the US, and having a physician's recommendation were the most common facilitators to receiving screening. The common inhibiting factors were financial issues, employment status, and worries/fears about the procedure. Conclusions: Despite a number of Asian Americans being vulnerable to CRC, individual Asian subgroups were underserved with CRC screening and intervention. Further studies should focus on each individual Asian subgroup and culturally proficient CRC screening intervention programs should be developed for each.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2004.11a
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• pp.349-357
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• 2004

최근 메일이 커뮤니케이션의 중요한 수단 중 하나로 자리잡고 있으나 과다한 정보 전달 및 원하는 않는 정보의 전달 등으로 인해 사용자가 메일을 확인하고 정리하기 위해 많은 시간과 노력을 투자하고 있다. 본 연구에서는 사용자가 적은 시간과 노력으로 메일을 활용하고, 보다 편리하게 사용할 수 있는 폴더 추천 방법론 개발을 목표로 하고 있다. 이러한 목표를 위해 TF-IDF를 기반으로 하는 다양한 방법론이 개발되고 활용되어 왔으나, 메일이라는 영역의 특성상 단어의 수나 내용에 한계가 있는 경우 안정적인 추천이 이루어지지 못할 수 있었다. 따라서 본 연구에서는 기존의 TF-IDF 방법에 사용자의 지식을 부여한 새로운 방법을 제시함으로써 단어의 수나 내용에 한계가 있는 경우에도 안정적인 추천이 이루어질 수 있도록 하였다. 또한 실제 데이터를 활용하여 기존의 방법과 본 연구에서 제시한 방법론을 비교 실험해 봄으로써, 본 연구에서 제시하고 있는 방법론의 성능을 입증하고자 하였다.

• Proceedings of the KIEE Conference
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• 1998.07a
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• pp.217-219
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• 1998

Korea Water Resources Corporation (KOWACO) annually supplies about 2 billion Kwh and 7.3 billion $m^3$ with its 10 multi purpose dams and 20 water supply offices. For the proper control and management of the above utilities, sequential control equipment and SCADA/DCS have been operated and maintained. In this paper, 8 control system evaluations for hydropower dam, water supply, electric power and subway projects during 1984-1997 were reviewed and analyzed. The systematic evaluation method has been established in the points of the purpose, method, procedure, evaluation team, evaluation criteria, total evaluation table and the contents of final recommendation report. With keeping in mind the essential points, it is expected for the more effective and fair evaluation of bids.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.43 no.7 s.349
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• pp.122-131
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• 2006

This paper introduces the security standardization trend and related technology in ITU-T SG 13 Q.15. Q.15 deals with the security requirements and guidelines over NGN(Next Generation Network) release 1. Korea proposes draft recommendation on 'AAA(Authentication, Authorization and Accounting) Service for network access control over NGN' and the procedure of the user authentication for the NGN convergence service terminals.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2005.05a
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• pp.131-138
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• 2005

Recommender systems have been widely advocated as a way of coping with the problem of information overload in e-business environment. Most of the existing recommender systems focused on what kind of items to recommend, although when to recommend to the target customer considering their context is an important issue. Even right item might be a spam advertisement or wrong recommendation for the customer if it can not be recommended at the right context. It is particularly important for recommendations where the user's context is changing rapidly, such as in both handheld and ubiquitous computing environment. Therefore, we propose CARS (Context-Aware Recommender System) based on CBR and context-awareness for ubiquitous computing environment. CBR is used to generate a target customer class and proper context. Context-awareness is used to gather suer context information from sensors, networks, device status, user profiles, and other sources. An illustrative case example is suggested to explain the procedure of CARS.

• Journal of Positioning, Navigation, and Timing
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• v.13 no.2
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• pp.167-177
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• 2024

The Korea Augmentation Satellite System (KASS) has been certified by the Ministry of Land, Infrastructure and Transport (MOLIT) and commenced Safety-of-Life (SoL) service at the end of 2023. KASS complies with the APV-I signal-in-space performance requirements defined in the International Civil Aviation Organization (ICAO) Standards and Recommendation Practices (SARPs). The performance of KASS is verified through two steps. In the first step, design conformity from the aspect of performance is verified by both review and analysis of design and simulation. In the second step, operational conformity is tested and assessed by operational testing using real data and a deployed system with operational SWs and configurations. This paper presents a methodology, a procedure and results for the KASS operational testing. Finally, performance degradation events and results by month and region during the operational testing are presented and analyzed.

• Journal of Intelligence and Information Systems
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• v.14 no.4
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• pp.201-216
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• 2008

Nowadays various new items are available, but limitation of searching effort makes it difficult for customers to search new items which they want to purchase. Therefore new item providers and customers need recommendation systems which recommend right items for right customers. In this research, we focus on the new item recommendation issue, and suggest preference boundary- based procedures which extend traditional content-based algorithm. We introduce the concept of preference boundary in a feature space to recommend new items. To find the preference boundary of a target customer, we suggest heuristic algorithms to find the centroid and the radius of preference boundary. To evaluate the performance of suggested procedures, we have conducted several experiments using real mobile transaction data and analyzed their results. Some discussions about our experimental results are also given with a further research area.