• Nuclear Engineering and Technology
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• 제56권3호
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• pp.886-892
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• 2024

The cladding temperatures and axial mass distribution computed by MAAP5 were compared with their measured values in the test bundle of the Phebus Test FPT0. The computed cladding temperatures were in good agreed with the measured values in the pre-transient phase. In the transient heat-up phase, the computed temperatures were overestimated by the Baker-Just correlation in MAAP5, but the computed temperatures could simulate the subsequently measured values. The computed mass distribution in the axial direction was in qualitative agreement with the measured one for post-test fuel damage observations. The calculated flow areas of inner and outer regions in the test bundle were compared with the photographic observations. MAAP5 computed them at the height of 0.2 m where the molten pool formed was in qualitative agreement with the photographic observations. It was found that the remaining steam flow paths might be caused by the gas-liquid two-phase flow counter-current flow limitation.

• 한국병원경영학회지
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• 제7권3호
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• pp.63-83
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• 2002

This study is to survey the materials purchasing and inventory management status and the characteristics and opinions of the staff in charge of purchasing and inventory of the general hospitals in Busan area in order to contribute to the rationalization of its management through the grasp of actual situation and the presentation of desirable improvement plan for the materials purchasing and inventory management. The status of medical institute had been surveyed by the purchasing/ administration managers of total 26 general hospitals, and the purchasing/ management questionnaires had been commenced with 86 staff of the 26 hospitals. Its major survey results, after the analysis of 24 medical institute statuses (return rate of 92.30%) and 60 staff questionnaires (return rate of 69.76%), are as follows. First, post-purchasing evaluation system is not used actively, orders are being placed by phone or fax, and general merchandise is being purchased through free contracts in most of the hospitals participated in the survey. Second, as per the materials supplying methods, the requisition and delivery system is currently the most popular in the hospitals surveyed, however, both the requisition and delivery system and the par level transfer system are the most desired in the hospitals of more than 500 beds, and the par level transfer system is the most desired in the hospitals under 500 beds for the materials supplying system in the future. Third, as per the inventory management system that is desired the most in the future, the SPD and JIT types are preferred in the hospitals of more than 500 beds, the stockless strategy is preferred in the hospitals under 500 beds, the senior staff above section chief grade prefer the stockless strategy, and the junior staff prefer the ABC classification and SPD types. Fourth, The necessity of purchasing staff's training for the materials management is highly recognized but the effectiveness is not so much acknowledged, which is because such a training is thought to be so superficial and formal that it is not helpful much in the actual field. When summarizing the survey results as above, the materials purchasing and management system is differed for each group of hospitals according to the size of beds, and the more scientific management system is largely required by the general hospitals in Busan city. They also hope the introduction of joint purchasing system, materials management by the bar-code system, and positive execution of the market survey and training of the relevant staff for the management of purchasing affairs. So the more systematic purchasing and inventory management is regarded to be necessary through the introduction of scientific and specialized education of materials management, market survey, and post-purchasing evaluation system also through the computerization of materials purchasing and inventory management as soon as possible.

• 한국재난정보학회 논문집
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• 제18권1호
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• pp.228-240
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• 2022

건설현장의 밀착형 안전관리를 위해 중대재해처벌법이 시행됨에 따라서 종합적 안전관리체계가 요구되고 있다. 안전관리수준평가관리는 건설기술진흥법에 따른 안전관리와 산업안전보건법에 따르는 보건위생 관리 체계와 안전경영시스템 등의 종합적 관계분석이 필요하다. 연구목적: 중대재해처벌법에 따른 안전. 보건관리의 종합적 분석 및 관계를 연구하여 보건위생관리의 안전평가수준향상에 궁극적 목적이 있다. 연구방법: 건설현장 전문가와 안전 관리자 대상으로 2차 델파이분석을 통해 설문항목의 타당성을 확인 후 구조방정식 예비모형을 통해 안전경영, 안전관리, 보건관리, 안전점검실행에 대한 잠재변인이 존재하는 회귀계수확인과 경로분석을 통해 총 효과(직접효과, 간접효과)로 매개효과를 확인하였다. 결과 및 결론: 구조모형에서는 안전관리, 보건체계, 안전경영에서 안전점검실행으로 가는 회귀계수(89%) 와 적정한 관찰변수의 람다 값이 확인되었다. 경로분석에서 보건계획수립적절성과 사후점검관리의 관계에서 보건위생을 매개하여 총 효과(.809)를 확인하였으며, 가설구조물안전성의 경로계수(.82)가 확인되었다.

• 한국환경보건학회:학술대회논문집
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• 한국환경보건학회 2002년도 춘계 국제 학술대회
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• pp.54-64
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• 2002

This study evaluated advanced water treatment (AWT) system in Korea. There are currently 16 plants operating with AWT. However, no attempt has been made to evaluate AWT system. This study selected one water treatment plant with AWT (pre-ozonation ＋ BAC). Using the operation data from 1995 to 2001 and pilot study results, the post-evaluation of the AWT system has been conducted. The study found that AWT improved water qualities of organic, ammonia, and turbidity, as expected. However, the extent of the improvement was generally short of the pilot study expectations. Pre-ozonation failed to decrease coagulant consumption. The dosage increased rather than decreased. AWT was, however, successful to decrease chlorine consumption. The chlorine reduction was related to the change in raw water characteristics and AWT introduction. Pre-ozonation failed to decrease coagulant consumption. The dosage increased rather than decreased. AWT was, however, successful to decrease chlorine consumption. The chlorine reduction was related to the change in raw water characteristics and AWT introduction, Both operation of pre-ozonation and reduced ammonia loading were responsible for the reduction. AWT increased the operation cost. Maintenance, raw water, and power cost increased, while labor and chemical cost decreased. Manpower reduction resulting form automation caused the decrease of labor cost. The reduction of chlorine consumption caused the decrease of chemical cost.

• 교육시설
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• 제16권2호
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• pp.27-36
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• 2009

The Korean government has recently implemented the public policy, so-called the Dormitory-based Public High-School Operation. The policy aims at providing the community-based high-quality education for the high-school students in the regional areas including agricultural, sea-side, and mountainous territories. Since the schools will be open for 24 hours a day during a whole year, they need to develop educational programs after regular school hours and violence prevention systems to maintain stable surroundings for study. In doing so, it is required for the schools to set up a systematic dormitory operation & administration program reflecting the demands of the dormitory users. Most of the schools, however, have not experienced operating a dormitory, thereby do not have any clues to successfully build the dormitory system. The main objective of this research is not only to provide the information on the demands of the dormitory users and their concerns with the demands but also to suggest guidelines to better build the system through conducting questionnaire survey to the students in a currently operated dormitory-based high-school.

• 한국추진공학회지
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• 제24권1호
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• pp.1-8
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• 2020

메탄/산소 이원추진제 소형로켓엔진의 성능평가를 위한 형상설계 및 시험평가시스템을 구축하였다. 인젝터는 추진제 미립화 성능이 우수하고, 연소불안정성이 적은 스월 동축형(swirl-coaxial) 방식을 채택하였다. 연소효율 비교를 위해 연소실의 종횡비는 1.5, 1.8, 2.1로 각각 설정하였다. 그리고 정밀추력측정장치의 측정 신뢰성을 높이기 위해 pre/post calibration을 실시하였다. 그 결과, 예비 지상연소시험에서 추력과 비추력은 89.2 N, 181.8 s로 78.4%의 효율을 가지고, 특성속도는 84.2%의 효율을 갖는 것이 확인되었다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.523-526
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• 2007

국내 건설산업은 활발한 해외시장 개척 및 정부의 주택보급정책 등에 의해 양적인 성장을 이루어 왔으나 최근 경쟁력 중심의 새로운 전략적 성장에 대한 관심이 높아지면서 공공건설사업의 성과측정을 필요로 하게 되었다. 현재 건설공사 완료 후 타당성 분석결과를 검증하고 공사내용 및 효과를 조사 ${\cdot}$분석하여 향후 유사 건설사업에 활용하기 위하여 2000년 3월부터 ${\lceil}$건설기술관리법 시행령 제 38조의18${\rfloor}$ 및 ${\lceil}$건설공사 사후평가 시행지침('01.05.10, 건관 58824 -318)${\rfloor}$에 의한 '건설공사 사후평가'제도를 제정하여 시행하고 있으나 이에 대한 인식도 및 활용도가 미미한 실정이다. 따라서 본 연구에서는 건설공사 사후평가시스템을 추후 유사 공사에 적극적으로 활용 될 수 있도록 평가항목 및 절차에 대한 개선방안 및 예비평가항목을 제시하였다.

• Journal of Multimedia Information System
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• 제4권3호
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• pp.115-122
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• 2017

Over the years, there has been much research in blended learning. However, research regarding its use and evaluation is inconsistent, not following any specific evaluation method, and may not be applicable to local students. In this research, a case study was conducted to evaluate the environment based on three levels of Kirkpatrick's model. Methodological triangulation was the principle of data collection used in which multiple sources of evidence were triangulated to provide insights into this study. Instruments used include surveys, interviews, questionnaires and pre- and post-tests that are guided by Kirkpatrick's model. The results revealed that students were positive with the learning environment. Students enjoyed learning with multimedia and motivated to learn as well as engaged in the environment. The tests showed significant difference in their learning. Students also perceived that they have transferred their learning from face-to-face lecture into problem-based learning and learning outcome. This research contributes to the field by providing deeper insights into assessments in multimedia-based blended learning environment and empirical evidence on views, attitudes, learning and knowledge transfer of students in higher education.

• 한국생활과학회지
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• 제17권3호
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• pp.413-423
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• 2008

The purpose of this study was to consider the evaluations of curriculum and young children by kindergarten teachers. The investigation subjects for questionnaire were 637 (the directors, vice-directors, the head teachers, and teachers) who were selected by proportional stratified sampling method for population and the subjects for interview were 11 teachers out of previous subjects who have worked at Jeolla-Do. The questionnaire was based on preceding studies and the propriety of contents was validated. The followings are results of this study. First, according to the purpose of curriculum, more than half of kindergarten teachers answered that they do perform evaluation to validate the young children's developmental process and there were statistically no significant differences by variables of kindergarten teachers. This study was to see whether they perform the evaluation results of curriculum or not, they relatively perform and there were statistically differences by kindergarten teacher's working location, establishment type, level of education and age. This study was to see whether they reflect the evaluation results of curriculum, and it was revealed as they relatively reflect. Also, there were statistically significant differences by kindergarten teacher's working location. And, kindergarten teachers requested the appropriate evaluation curriculum that also requires the adequate education for teachers and organized supporting system as a implication plan. Second, as of material types for children's portfolio evaluation, teachers collect activity products at most, then activity picture, observation, standardized test, teacher's journal, recording or tape-recording, post-interview and data that were collected at home. And, kindergarten teachers requested the appropriate evaluation method and the supply of human resources as a implication plan for young children's evaluation.

• 한국물환경학회지
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• 제29권5호
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• pp.656-665
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• 2013

This research was conducted to investigate pollutant load unit factor from aquacultural farms. Pollutant load unit factors were investigated on the 13 kinds of fish type, i.e., Trout, Leather Carp, Eel, Carp, Cartfish, Freshwater Eel, Crucian Carp, Colored Carp, Sturgeon, Marsh Snail, Sweetfish, Pond Snail, Eriocheir Sinensis. Water qualities in aquacultural farms were investigated wide range of values by fish type and pollutant items. High BOD and COD values were observed at the Leather Carp (Ponded water system), Cartfish (Ponded water system) and Freshwater Eel (Recirculating System). TOC and DOC values were relatively high at the Freshwater Eel (Recirculating System) and Eriocheir Sinensis (Extensive). Eel (Ponded water system) and Freshwater Eel (Recirculating System) produced high concentrated nutrient pollutants, i.e., T-N, T-P. Pollutant load unit factors are dependent on fish type, aquacultural type, water quality items, etc. If some fishes have similar basic unit values, those could be applied for TMDLs as a group of fish having same pollutant load unit. The water quality concentrations of post treatment facilities' (mainly reservoir tank) effluent were higher than those of fish raising bath because of extracting pollutant from sediment in the reservoir tank. Therefore, it needs to the management and regulations about post treatment facilities.