• Nuclear Engineering and Technology
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• 제53권2호
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• pp.484-497
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• 2021

This paper proposes an extended time uncertainty analysis approach in Level 2 human reliability analysis (HRA) considering severe accident management (SAM) strategies. The method is a time-based model that classifies two time distribution functions-time required and time available-to calculate human failure probabilities from delayed action when implementing SAM strategies. The time required function can be obtained by the combination of four time factors: 1) time for diagnosis and decision by the technical support center (TSC) for a given strategy, 2) time for strategy implementation mainly by the local emergency response organization (ERO), 3) time to verify the effectiveness of the strategy and 4) time for portable equipment transport and installation. This function can vary depending on the given scenario and includes a summation of lognormal distributions and a choice regarding shifting the distribution. The time available function can be obtained via thermal-hydraulic code simulation (MAAP 5.03). The proposed approach was applied to assess SAM strategies that use portable equipment and safety depressurization system valves in a total loss of component cooling water event that could cause reactor vessel failure. The results from the proposed method are more realistic (i.e., not conservative) than other existing methods in evaluating SAM strategies involving the use of portable equipment.

• Structural Engineering and Mechanics
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• 제86권3호
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• pp.349-359
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• 2023

This paper presents a technique for determining the optimal number of elements in stochastic finite element analysis based on reliability analysis. Using the change-of-variable perturbation stochastic finite element approach, the probability density function of the dynamic responses of stochastic structures is explicitly determined. This method combines the perturbation stochastic finite element method with the change-of-variable technique into a united model. To further examine the relationships between the random fields, discretization of the random field parameters, such as the variance function and the scale of fluctuation, is also performed. Accordingly, the reliability index is calculated based on the explicit probability density function of responses with Gaussian or non-Gaussian random fields in any number of elements corresponding to the random field discretization. The numerical examples illustrate the effectiveness of the proposed method for a one-dimensional cantilever reinforced concrete column and a two-dimensional steel plate shear wall. The benefit of this method is that the probability density function of responses can be obtained explicitly without the use simulation techniques. Any type of random variable with any statistical distribution can be incorporated into the calculations, regardless of the restrictions imposed by the type of statistical distribution of random variables. Consequently, this method can be utilized as a suitable guideline for the efficient implementation of stochastic finite element analysis of structures, regardless of the statistical distribution of random variables.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.247-248
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• 2021

Recently, the government is pursuing to reduce the serious accidents in most industries, including the construction industry, by enacting laws on punishment. The accident rate tends to be depended on the size and type of construction sites, and the accidents occur frequently due to inadequate implementation of safety management system and management standards, especially, in small and medium-sized sites. This study has performed the profiling of 265,000 accident cases on construction sites by attribute analysis such as the ratio of days lost to work, and pattern of days lost to work compared to the size of the construction. It turned out that the proportion of accident cases was high mainly in small-scale construction sites, and long-term labor losses occurred. Shortly, it is necessary to establish an institutional standard for applying a realistic safety management cost calculation and management system centered on small-scale sites. Therefore, this study is expected to be used as fundamental data or guideline for developing a customized safety management and accident prevention system for a worker reflecting the conditions of a construction site in the future.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.532-535
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• 2022

경로 추종 알고리즘은 행성 탐사, 무인 배송, 자율 주행 등의 다양한 모바일 플랫폼에 대하여 많은 연구가 수행되었다. 하지만, 환경에 존재하는 불확실성으로 인해 실제 응용 분야에서 높은 정확도를 보장하기 어렵다. 본 논문에서는 pure pursuit 알고리즘으로 제어되는 모바일 로봇의 경로 추종 성능을 분석함으로써 알고리즘 설계 및 구현에 대한 지침을 도출하는 것을 목표한다. 이를 위해, 전방 주시 거리(look ahead distance)를 설정하고 오류가 있는 액추에이터를 장착할 때, pure pursuit 알고리즘의 추종 정확도를 전산 실험을 통해 평가한다.

• 한국식품영양과학회지
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• 제33권2호
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• pp.365-372
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• 2004

본 연구는 공동관리 급식을 시행하는 초등학교의 안전한 급식을 위하여 HACCP 시스템 적용 지침을 개발하고자 경북 경산지역에 위치한 W와 D초등학교의 급식메뉴를 선정하여 2002년 12월∼2003년 2월에 실시하였다. 급식 메뉴에서 학생들의 편식을 교정하데 도움이 되며, 미생물에 의한 오염 가능성이 높은 냉동 해산물을 사용하는 오징어덮밥을 HACCP 적용메뉴로 결정하였다. 오징어 덮밥의 생산 단계에 따라 공정흐름도를 작성하여 생산단계에서 반드시 점검해야 할 HACCP을 적용 지침를 제시하였다 (1) 해동 및 세정: 냉동 오징어는 흐르는 수도물로 해동하여 손질한 후 조리직전까지 식품의 내부온도는 가능한 1$0^{\circ}C$ 이하로 유지 또는 냉장보관하고, 소요시 간은 30분을 초과하지 않도록 한다. 채소는 3구 세정대에서 세정하고, 지하수 사용은 배제해야 하며 작업은 20분 이내에 완료되도록 한다. (2) 썰기: 오징어와 채소를 사용하는 칼과 도마는 구별하여 사용하며, 조리원의 개인위생을 점검하고, 칼과 도마를 포함한 조리기구의 사용 전 후의 세정 및 소독상태를 확인한다. (3)조리: 오징어와 채소는 각각 조리(데치기와 볶기)한 후 함께 섞어 끓인다. 오징어는 완전히 익혀야 하며, 완성된 음식의 내부온도는 94$^{\circ}C$ 이상이어야 하며, 21분 이상 가열한다. 맛보기 는 올바른 방법으로 실시해야 한다. (4) 배식: 조리원의 위생습관(마스크, 머리수건 및 일회용 장갑착용)을 확인하고, 음식 (오징어덮밥)의 내부온도(84.4$^{\circ}C$이상)와 조리실의 이상적 실내온도(15∼18$^{\circ}C$), 조리기구 취급이 위생적으로 이루어지는지 확인한다. 공동관리교의 안전한 급식은 표준화된 메뉴에 따라 공정 흐름도를 작성해야 하며, HACCP이 적용된 지침서가 모든 메뉴에 따라 갖추어 져야 비로소 실행될 수 있다. 따라서 정확한 온도를 측정하고 HACCP을 이해할 수 있는 교육프로그램과 다양한 종류의 식단을 생산할 수 있는 기본적인 시설과 기구를 갖춘 조리실, 전문 영양사와 고용 조리원 확보 및 안전한 식수공급이 이루어 져야 하며 이를 뒷받침하는 국가차원의 지원과 지속적인 연구가 필요하다고 사료된다.

• 한국산업보건학회지
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• 제19권4호
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• pp.347-362
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• 2009

The United Nation agreed to adopt the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) until 2008 to solve the significant differences enough to result in different labels or MSDS for the same chemical in different jurisdictions. Though the GHS is an ideal solution in the respect of pursuing only one format of a MSDS throughout the world, it may cause confusion at the beginning due to lack of information. So the Korean Ministry of Labor (MOL) revised the Industrial Safety and Health Act (ISHA) and related public notice on the classification & labelling of chemicals according to the GHS in 2006. The transition period for the implementation of the GHS for substances was set until Jun 30, 2010, and for mixtures until Jun 30, 2013. To promote the implementation of the GHS in Korea, we developed an application program for constructing MSDS database and a management program for providing MSDS contents on the web in accordance with the GHS. We analyzed the sixteen sections of MSDS by the GHS guideline, and the result showed the necessity to construct logically connected DB for chemical identifier, hazard classification, label, standard phrases and regulatory information. Each section of a MSDS was divided into sub-databases to update the database efficiently. According to Relational Database Management System (RDBMS), the sub-databases were automatically assembled and subsequently a full MSDS is produced. At present, MSDS database for 6,314 substances has been built and provided through internet as the MSDS Editing program. During the service period from January 1 to March 31, 13,666 users have searched MSDSs for 33,401 substances. During program review, some comments about the classification results and other MSDS element sources were reported but no technical bug reported. We expect that the MSDS DB management system in accordance with GHS will accelerate the implementation of the GHS in Korea.

• 한국멀티미디어학회논문지
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• 제11권5호
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• pp.710-727
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• 2008

서비스지향 컴퓨팅 시스템은 시스템의 기능적 단위인 서비스들을 재사용함으로 해서 개발 시간과 노력을 줄이는 특성 때문에 분산 환경이 일반화 되면서 더욱 중요하게 부각되고 있다. 서비스의 재사용은 서비스들 간의 느슨한 결합에 의하여 효과적으로 이루어질 수 있다. 그러나 상속 및 포함 관계와 같은 객체지향 시스템의 강한 연관 관계들은 객체들 간에 강한 결합을 생성한다. 상속 관계와 포함 관계가 없는 컴포넌트 기반의 시스템은 컴포넌트들 간에 느슨한 결합을 생성한다. 그리하여 컴포넌트 인터페이스들에 의해서 제공된 기능을 사용해서 실시간에 서비스지향 시스템의 서비스를 실현한다. 따라서 컴포넌트기반 시스템은 기능적 서비스 단위들을 효율적으로 제공하기 위하여 서비스지향 컴퓨팅 시스템으로 확장될 필요가 있다. 또한, 서비스지향 컴퓨팅 시스템을 지원하는 기존의 방법들은 서비스 계층의 명확한 분류 및 서비스 계층에 따른 명확한 서비스 식별 가이드라인 그리고 서비스 계층 간의 매핑 방법을 제시하지 않고 있다. 따라서 본 논문에서는 비즈니스 관점의 서비스와 구현 관점의 서비스를 계층으로 나누어 분류하고 서비스 식별 가이드라인 및 각 계층의 서비스들 간의 매핑을 제안한다. 즉, 우리는 서비스 계층과 다양한 크기의 서비스 식별 방법을 연구하고, 각 계층의 서비스들 간의 매핑 방법을 도출한다. 이를 기반으로 기존 컴포넌트 기반 시스템을 서비스 지향 컴퓨팅 시스템으로 확장할 수 있다.

• 대한한방부인과학회지
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• 제19권2호
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• pp.240-260
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• 2006

Purpose : The objective of this study is to serve guidelines for the investigation and management of uterine myomas with KM therapies. Methods : English-language articles from PubMed and Korean-language articles from the database of the journal of oriental gynecology were reviewed from 2000 to 2005, using the key words 'uterine myoma', 'uterine leiomyoma', 'fibroid', 'uterine artery embolization', 'endometrial ablation', 'myomectomy', and jagungguenjong(子宮筋腫)'. Results and Limits : The areas of clinical practices considered in formulating this guideline are assessment, KM therapies, medical treatments, myolysis, selective artery occlusion, endometrial ablation and surgical therapies including myomectomy and hysterectomy. Implementation of this guideline would optimize the decision-making process of women with uterine myomas and further investigation or therapy of their KM doctors. But we don't have abundant evidences of clinical trials of uterine myoma treated with KM therapy, though we treat or manage that with every-day clinical practices. Moreover cultural gaps between Korea and other western countries make many differences in the attitude to surgical therapies, especially hysterectomy. So it is very difficult to compare W therapies with other therapies. Moreover it is much difficult to estimate cost-effectiveness and benefit of those therapies in QOL. Conclusions : The majority of uterine myoma is asymptomatic and will not require any intervention or further investigation. But unmarried women who wish to marry and get pregnant want to find safe therapy for their asymptomatic uterine myomas. In that case, most of the patients prefer non-surgical therapy to surgical therapy. So KM herbal medicinal therapy is a good alternative method for those patients. For the symptomatic myomas, hysterectomy offers a definitive solution. However, it is not the best solution for women who wish to preserve their uterus. So KM therapy is a good alternative for them. But the predicted benefits of alternative therapies including KM therapy must be carefully weighed against the Possible risks of these therapies. To improve the quality of life of both women with asymptomatic and symptomatic myomas, selecting and treating patients should be done carefully. Moreover, the effect of KM therapy has to evaluated, comparing the possible situation without treatment and the benefit of constant treatment as a health-care system.

• 간호행정학회지
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• 제11권3호
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• pp.255-264
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• 2005

This study is a descriptive research in investigating the perception of doctors and nurses with regard to DNR, and data were collected through survey questionnaires. The period of collecting data was between July 15 and October 30, 2004, distributing 128 questionnaires to 128 participants, and a total of 110 questionnaires from 55 doctors and 55 nurses were collected (86%)among 70 different hospitals. The collected data were analyzed using SAS program to get real number and percentage, and were also analyzed with $X^2$-test. The Study Results are as follows: 1. Respondents who agreed with the necessity of DNR was 97.27%, the reasons of DNR necessity were 59.20% of 'impossibility of recovery in spite of lots of efforts,' and 35.20% of 'for the purpose of choosing a comfortable and dignified death,' and 97.2% of respondents answered that it was necessary to give explanation of DNR to serious case patients, terminal patients and their family. 2. Problems derived from DNR decisions were 44.44% of 'lack of treatment and nursing,' 21.11% of 'guilty conscience about failing to do best efforts,' and 71.57% of CPR implementation right after DNR decision. 3. Reasons of implementing CRP for patients with DNR decision were 50.94% of 'for the presence of family and relatives at the point of patient's death,' 20.76% of 'guardian's change of DNR decision,' and 16.98% of 'no communication for the consent after DNR decision.' 4. With regard to who was to make DNR decision? there was a difference in the opinion between doctors' and nurses' group while the group of doctors chose 'by the consent of the family and the doctor in charge,' and the group of nurses chose 'patient's intension,' and with regard to Have you received DNR related education? and Will people who want DNR increase if there is explanation given? there was a difference between the two groups. 5. In the catholic institutions, respondents of 71.7% said that it was necessary to take DNR depending upon the situation, and 73% said that they had performed DNR before. 6. In the institutions with over 500 beds, 91.92% of respondents said that there should be an establishment of guideline book as a written format to implement DNR. From the results of this study, it was found that DNR was implemented and executed broadly in clinical fields in the absence of necessary instructions and/or guideline, and that DNR order was placed to the group of doctors who got less opportunity for proper education than did that of nurses.

• 한국비블리아학회지
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• 제33권4호
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• pp.5-25
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• 2022

본 연구의 목적은 수요자인 학교가 교육과정 운영을 위하여 요구하는 사서교사의 직무와 역량 사례를 분석하고, 사서교사의 전문성 향상 방안을 제안하는 것이다. 이를 위하여 IB 국제학교가 사서교사를 선발하기 위하여 게시한 20건의 구인광고에 포함된 사서교사의 직무와 역량을 IFLA 학교도서관 가이드라인을 기준으로 분석하였다. 그 결과 IB 국제학교의 사서교사 직무 및 역량은 IB 교육과정 지침에 근거를 두고 있으며, 이 지침은 IBO 교육과정이 지향하는 교육이념과 학습자상에 기반을 두고 있는 것으로 나타났다. 아울러 학교가 사서교사에게 가장 많이 기대하는 직무는 도서관 장서관리 및 협동을 통한 교수이며, 이를 위한 주요 역량은 의사소통과 협동능력, 교수-학습·교육과정·교육설계 및 제공 그리고 디지털과 매체활용능력이다. 이러한 분석 결과는 사서교사의 전문성은 교육과정에서 제시하는 교육적 인간상과 학습자 역량에 기반을 두고 있어야 함을 보여준다. 이를 바탕으로 본 연구에서는 사서교사의 전문성 신장 방안을 다음과 같은 측면에서 제시하였다. 첫째, 국가 수준의 교육과정 편성 운영 지침에 학교도서관의 역할 포함하기 둘째, 학교도서관진흥법시행령 개정을 통한 인적자원의 직무 구분하기 셋째, 사서교사 자격 취득을 위한 기본이수 과목 개편 및 교육실습과 사서교사 임용시험에 협동수업 시연 도입하기 등이다.