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방사선 발생장치 제조업체 및 의료기관 종사자의 방사선 관리에 대한 지식, 태도 및 실천
김규환(Kyu-Hwan Kim),배석환(Seok-Hwan Bae) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.2
이 연구는 방사선 발생장치 제조업체 종사자와 의료기관 종사자들 간의 방사선안전관리에 대한 인식을 알아보고 적극적인 대처능력과 안전수준을 향상시키는데 기초자료로 활용하기 위하여 연구조사하게 되었다. 방사선에 대한 지식, 태도 실천 점수는 성별, 연령, 결혼상태, 직종, 직위, 현 직장근무기간, 직장 총 근무기간, 방사선 관련 유사업무 유무, 매뉴얼 비치 여부, 방어 시설유지 여부, 방어 장비보유 수, 방사선 안전교육 여부, 특수건강검진 여부, 방사선 용어인지 여부와 관련이 있었으며, 특히 방사선 관련 직종에서 방사선사의 지식 점수가 가장 높았다(p<0.05). 방사선 안전관리는 방사선제조업체 종사자 및 의료기관 종사자 모두 방사선 노출에 적극적인 방어 노력이 필요하며방사선 안전관리를 위해서는 지침 준수, 주기적인 교육, 시설보강, 매뉴얼 작성, 특수 건강검진 등 제도적 장치가 필요하다. This study investigates the perception of radiation safety management in radiation generator manufacturing workers and medical institutions. The basic data obtained is further applied to improve active coping ability and safety levels. The knowledge and attitude practice score of radiation was found to be related to gender, age, marital status, occupation, position, current work period, total work period, radiation related work period, the manual available, defense facility maintenance, number of defense equipment, radiation safety education, special health examination, and recognition of radiation terms. In particular, the knowledge score of radiologists was highest among the radiation-related occupations (<0.05). Radiation safety management requires active defense endeavors to prevent radiation exposure, by both workers of radiation manufacturers and medical institutions. Moreover, institutional devices such as compliance with guidelines, periodic education, facility reinforcement, manual preparation, and special health checkups are required for efficient radiation safety management.
빛의 직진 개념 지도를 위한 탐구 학습모듈의 개발 및 적용
김규환 ( Kyu Hwan Kim ),김중복 ( Jung Bog Kim ) 경북대학교 과학교육연구소 2011 科學敎育硏究誌 Vol.35 No.2
The purpose of this study was to develop inquiry modules for learning straight propagation of light, to verify their efficiency, and to acquire implications. this study proposes teaching modules for improvements of light experiments, which were developed in this work. Inquiry modules were applied to 75 school teachers(8 elementary school teachers, 67 middle school and high school teachers) for examining that the modules make teachers have the scientific concepts. Then, conception changes were analyzed except 5 teachers who responded poorly. The pre-test result shows that most teachers have alternative conceptions, which is that they thought the bright shape on apparatus`s bottom panel itself shown in the textbook as evidence for the path of light`s straight propagation. The post-test result shows this alternative conception was changed into scientific conception. Unlikely pretest, most teachers` conception was changed into the scientific conception that the light come from a light source. Teachers are able to express that the light beam comes from a miniature electric bulb. Further more, most teachers can draw light`s path correctly; from the miniature electric bulb, through vertical panel having a hole, to the apparatus bottom.
화학소재산업의 증기운 폭발사고 사례분석을 통한 안전성 확보방안 연구
김규환(Kyu-Hwan Kim),이익모(Ikmo Lee),황용우(Yongwoo Hwang),천영우(Youngwoo Chon) 한국위험물학회 2017 한국위험물학회지 Vol.5 No.1
Petrochemical complex has developed rapidly with a high degree of industrialization of chemicals since 1960s. Production and use of chemical increased dramatically. These various damage caused by accidents by fire, explosion and leaks behind the chemicals is constantly increasing. Implementation of PSM from 1996 to get a safety in efforts, but accidents with enormous damage to the environment and human have occurred constantly. The explosion accident of them cause fatal accidents and serveral victims. In this study, the causes of accidents and accident prevention measures were to investigate the incident in accordance with the type of explosive type. Depending on the type of explosive was investigated in the form of increased vapor cloud explosion of a runaway reaction to, and analyzed the differences between domestic and international accident prevention measures. On the other hand, if domestic measures for the cause of the accident was that most, if foreign cases were matched for similar types of analysis come, predicting an accident scenarios were compared to a similar case. In addition, by configuring the accident prevention plans, incident response planning, disaster recovery planning, such as by presenting the safety information for each situation was constructed to ensure the safety of chemicals used in the workplace.
5000계열 알루미늄 합금의 해수 내 전기화학적 거동 비교
김성종(Kim Seong-Jong),이승준(Lee Seung-Jun),김규환(Kim Kyu-Hwan) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.10
There are many vessels built with FRP (Fiber-Reinforced Plastic) material for small boats as like leisure boats and patrol ships. However, it is impossible for FRP to be used for recyclable material owing to environmental problems. Hence, vessels with Al alloy as an alternative material instead of FRP begins to get spotlight to solve several problems such as recycle, collision accident. Al alloy has good advantages which are characteristics of environmental-friendly properties, lightweight and corrosion resistance. In this study, 5083-O, 5083-H116 and 5083-H321 Al alloy were selected and electrochemical experiments were carried out in various time to select optimum material having good characteristics in sea water solution.
5000, 6000 계열 알루미늄 합금의 해수 내 캐비테이션 특성
김성종(Kim Seong-Jong),이승준(Lee Seung-Jun),김규환(Kim Kyu-Hwan) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.10
Al alloy has good advantages which are characteristics of environmental-friendly properties, lightweight, good weldability, durability, corrosion resistance. In addition, the advent of Al alloy ships like fishing and leisure boats are getting wider and wider to reduce fuel consumption due to lightweight. Even though corrosion and cavitation seriously occurs during navigation of vessels, the research for corrosion protection of Al alloy is not investigated since most people tend to misunderstand for Al alloy itself which has good anti-corrosion characteristics and to have insufficient knowledge about Al alloy cavitation effect caused by high speed. In this study, 5052-O, 5456-H116 and 6061-T6 Al alloy were selected and cavitation tests were carried out in sea water solution.