• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2008.02a
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• pp.89-93
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• 2008

본 논문에서는 단순전력 분석(SPA)과 오류주입공격(FA)에 안전한 중국인의 나머지 정리를 이용한 RSA 암호 시스템(CRT-RSA)에 대하여 논한다. CRT-RSA를 이용한 서명 알고리즘은 스마트카드와 같은 내장형 장치(embedded device)에서 널리 사용된다. 하지만 이러한 장치들은 전력분석 공격과 오류주입 공격에 취약하다. 2005년 Giraud가 처음으로 단순전력분석과 오류주입공격에 모두 안전한 대응 방법을 제안하였다. 본 논문에서는 Giraud의 대응 방법에 대한 다른 공격방법을 소개하고, 제시한 공격 방법에도 안전한 대응 방법을 제안한다. 본 논문에서 제안하는 대응 방법은 세 개의 메모리와 덧셈과 뺄셈연산을 추가적으로 요구한다. 추가적으로 요구되는 연산량은 모듈러 지수승 연산에 필요한 연산량에 비교하면 크게 고려하지 않아도 될 연산량이다. 그러므로 본 논문에서 제안하는 대응 방법은 내장형 장치와 같은 환경에서 안전하고 효율적으로 이용될 수 있다.

• Korean Journal of Community Nutrition
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• v.6 no.5
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• pp.837-847
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• 2001

The main purposes of this study were to survey and assess the current situation surrounding solid waste generation in school foodservices, to identify and evaluate the measures(reduction and recycling programs) taken by the foodservices for waste disposal, and to suggest appropriate reform measures to improve the current status, especially in terms of environmental preservation. Questionnaires on solid waste management practices were mailed to 206 school foodservice dietitians in the Kyungbuk region : a 64.0%(N = 130) response rate was obtained. While there are food waste and packaging waste generated from the foodservice operations, about a third(34.1%) of the foodservice operations were responsible for the disposal of both the food wastes and packaging wastes. About 90% of school foodservice managers were responsible for managing solid wastes. The primary recycling methods of leftovers generated from the school food service operations were livestock feed(76.0%). About 60.0% of school foodservice managers conducted the food waste reduction program. The performance by the foodservice managers in reducing the food waste was not satisfactory in several fields, such as developing environmentally friendly menus or abiding by the standard recipe, etc. In addition, the government assistance system was not properly working in the food service management. In conclusion, we should focus on increasing the performance in reducing the food waste by the foodservice managers, strengthening and facilitating the government assistance system for the food waste management and to develop education methods and education materials for food waste management.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.459-461
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• 2008

오늘날 전자정부는 초고속 정보통신망과 네트워크, 인터넷 기반기술을 이용한 정부간, 정부와 시민, 기업간 다양한 분야에 원활한 행정서비스를 제공하고 있다. 지금까지 일반 패키지 소프트웨어나 임베디드 소프트웨어 등에 관한 품질평가기술 개발 연구는 다양하게 진행해 왔지만 전자정부 소프트웨어에 대한 연구는 활발하지 못한 실정이다. 본 연구에서는 ISO/IEC 12119와 ISO/IEC 9126 및 ISO/IEC 14598을 기반으로 전자정부 소프트웨어의 품질요구사항을 체계화하고 전자정부 소프트웨어 품질평가를 위한 메트릭을 시험모듈 형식으로 구축하고 이를 적용하기 위한 시험표를 구축하였다.

• Journal of Korean Institute of Industrial Engineers
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• v.40 no.3
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• pp.291-298
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• 2014

Demand forecasting plays a key role in overall business activities such as production planning, distribution management, and inventory management. Especially, for a fast-changing environment of the clothing industry, logical forecasting techniques are required. In this study, we propose a procedure to predict product life cycle using data mining algorithms. The proposed procedure involves three steps : extracting key variables from profiles, clustering, and classification. The effectiveness and applicability of the proposed procedure were demonstrated through a real data from a leading clothing company in Korea.

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.19-22
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• 2004

6시그마는 현재 전 세계를 강타하고 있는 경영철학이며 그 적용분야가 산업 전 부문에 이르고 있다. 현재까지 국내에서의 6시그마 활동을 보면 대부분 제조업 중심으로 이루어져 왔다. 그러나 실제로 우리나라 산업을 살펴보면 서비스업이 차지하는 비중이 대단히 높으며 그렇기에 충분한 연구가 이루어져야 할 것이다. 이에 본 연구에서는 대표적 서비스 기업인 A호텔에서 진행된 6시그마 프로젝트 중 에너지 비용절감 프로젝트에 관하여 소개하고자 한다.

• The Korean Journal of Health Service Management
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• v.5 no.4
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• pp.81-93
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• 2011

The purpose of this study was to examine the stressors of students in high school. Demographic data such as jobs of parents, family types, levels of living (parents' monthly income) and students' school records, high school types, number of friends, religion, pocket money and their sex showed as the main causes of high school students' stress. The data was analyzed by a t-test, one-way ANOVA, and Duncan Multiple Range Test. The variable which significantly influenced the general properties was sex(p=0.001), high school type (p=0.000), number of friends (p=0.002), parents monthly income (p=0.011) and whether existence of their father or not (p=0.045). In the result (stress score), girl students (25.07) feel greater stress than boy students (20.68). High school type, an academic girls' high school (27.34) and boys' high school (25.67) showed the highest. It was indicated in the study that it is necessary to have programs that help students' stress management and improve high school type Systems.

• Korea Journal of Hospital Management
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• v.17 no.1
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• pp.59-78
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• 2012

The purpose of this study is to evaluate on the fitting with human resource practice and strategic on 6 public hospital in the point of resource based view. At the result of this study, public strategy is not much fitted into HRM(human resource management) system, but it shows positive result of the fitting with efficiency strategy and HRM system. These results were associated with the integration of G Medical Center. Generally 6 public hospitals of the HRM system and the strategy had not been linked. They also did not achieve a great outcome. We suggest that the manager in charge of each hospital make strategies of the hospital, and then evaluates about fitting with HRM system. We hope, hereafter, it applied the analysis methods that evaluates it with financing result and individual non-financial result all together.

• Journal of Information Science Theory and Practice
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• v.11 no.3
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• pp.16-28
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• 2023

Record management, especially in schools as an institution's information centre, needs serious attention from government agencies. Under record management policy, there needs to be practical guidance on record management specific to schools. This paper aims to construct a record management model based on the Eight Indonesian Education Standards to support school accountability in Indonesia. The urgency of this paper in filling the gap in the Electronic Record Management System (ERMS) role is primarily to support school accountability. It is important to include educational laws and regulations in Indonesia to be a foundation in archive management, including preparing the ERMS. This study aims to develop a model of record management in schools. The final stage in this research is to find the final model. The final model is a model that experts and practitioners have validated. A total of 30 records managers were selected for the interviews. Furthermore, the trial was carried out in 30 senior high schools. The research sampling consisted of representatives of archive managers at selected schools from five islands in Indonesia (Kalimantan, Java, Papua, Sumatra, and Sulawesi). Our research findings show that conceptual models meet valid criteria and significantly impact archivist performance in better schools. The practical implication is that the archival management model based on national education standards policies contributes to practical archives and records management to support school accountability.

• Information Systems Review
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• v.5 no.2
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• pp.151-168
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• 2003

A knowledge portal is an integrated gateway for accessing relevant knowledge, collaborating and communicating with other users, and also linking internal applications which is becoming crucial in the age of information abundance. Research and development is a typical knowledge-intensive activity. However, knowledge management support in R&D has been minimal in most research organizations. In this paper, a knowledge portal is designed to support team-based researches in science and technology for searching and browsing knowledge, and also communicating with other team members, coordinating research project and collaborating with other researchers. Automating knowledge acquisition from various knowledge sources, knowledge categorization by applying text categorization method, and knowledge recommendation can help to relieve management effort and increase the efficiency of knowledge management processes. A prototype system based on the suggested model is also presented.

• Nuclear Engineering and Technology
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• v.53 no.9
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• pp.2839-2846
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• 2021

In this study, experiments of downward-facing flow boiling were conducted to investigate material effects on CHF. Experiments were conducted using aluminum, copper, and carbon steel. It was found that different materials had different CHFs. Aluminum has the biggest CHF while copper has the lowest CHF for each mass flux. After experiment, surface wettability increased and surface became rougher, which was probably due to the oxidation process during nucleate boiling. The CHF difference is likely to be related to the surface wettability, roughness and thermal effusivity, which influences the bubble behavior and in turn affects CHF. Further studies are needed to determine which factor is dominant.