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퍼지함수와 PDA 모형을 이용한 비상시 용수공급 성능지표 개발
옥수연(Oak Sueyeun),유광태(You Kwangtae),노헌승(Noh HunSeung),전환돈(Jun Hwandon) 한국방재학회 2018 한국방재학회논문집 Vol.18 No.2
The water distribution system is an infrastructure system supplying water to urban areas. Since it has a great influence on the quality of life and financial aspect of customers, the performance evaluation of the system for an efficient management and operation is essential. Until now, most of the suggested performance indicators for the system are based on the available demand and pressure at demand nodes obtained from the hydraulic simulation. However, those performance indicators based on the hydraulic simulation may not consider the actual usability of water for customers properly. Therefore, in this study, the application of fuzzy functions along with the available demands at demand nodes, which are obtained from the hydraulic simulation, from the various points of view, makes us possible to evaluate the system performance by depending on the set value of the variables. For this purpose, we use a PDA model, which can simulate various abnormal operation conditions and suggest two performance indicators: the possible water supply range indicator (PWSRI) for the water supply performance evaluation for an individual demand node and the possible water supply indicator for the entire system (PWSIES). The suggested method and indicators are applied to the real water distribution system of A-city in Korea to verify the applicability.Q 상수관망 시스템은 국내 전역에 용수를 공급해주는 사회기반시설로, 수요자의 삶의 질과 경제에 직접적인 영향을 끼치는 중요한 시스템으로 효율적인 관리와 운영을 위한 성능 평가가 필수적이다. 기존에 제안된 상수관망의 성능 평가를 위한 지표는 수리학적 해석을 통해 계산된 절점의 공급가능 유량 및 압력을 기반으로 한다. 그러나, 이와 같은 공급가능유량을 위주로 한 수리학적 성능 평가지표는 실제 수요자가 느끼는 용수의 사용성에 미치는 영향을 고려하기 힘들다. 따라 본 연구에서는 수리학적 해석을 통한 절점별 공급 가능 유량에 퍼지함수를 적용하여, 변수 조합에 따라 따양한 관점에서 공급 성능을 평가할 수 있는 새로운 공급 성능 지표를 제안하였다. 이를 위하여 다양한 비정상상황을 모의할 수 있는 PDA 수리해석 모형을 이용하여, 개별 절점의 공급 성능 평가를 위한 공급 범위 기준 성능 지표(PWSRI)와 전체 관망의 공급 성능을 평가할 수 있는 공급 가능량 기준 성능 지표(PWSIES)를 제안하였다. 또한 제안된 성능 지표들을 A시의 관망의 배수지 문제발생 시나리오에 적용하여 그 사용성을 검증하였다.
권인각,성영희,박광옥,유옥수,김명애 병원간호사회 2007 임상간호연구 Vol.13 No.1
Purpose: This study was aimed to develop a desirable clinical ladder system(CLS) model for hospital nurses in order to make recommendations for CLS application in Korea. Methods: This study was carried out through literature review and a survey of the state of CLS application in Korea. 134 hospital nurses who attended the seminar on CLS. participated in the survey. Results: 1. Most of hospital nurses have positive attitude toward the introduction of CLS and perceived the CLS would promote excellence in clinical nursing and improve nurses' job satisfaction. 2. To establish a good CLS model, a proper number of stages must be established and the level of excellence in each stage should be clearly delineated. The most preferred one was four-stage model. 3. For evaluation methods for promotion, test, performance evaluation, portfolios, and exemplars were suggested and would be used in combination. However, maintaining fairness and staff nurses' workload and psychological burden challenge the CLS application. 4. For compensation, financial reward was mostly preferred, and chances for personal development and professional compensation, compensation in working conditions and social recognition were proved to be useful. 5. To be successful, excessive stress, sense of incongruity, competitive atmosphere, concerns about unfairness, and despair or withdrawal after failure in promotion or reappointment should be considered and overcome. Conclusion: Some recommendations for introducing CLS were made. In order to suggest an ideal CLS model in Korea, more comprehensive survey and outcome analysis of the CLS are needed.