수직 평행 평판에서의 혼합대류 열전달

양성환,권순석 대한기계학회 1988 대한기계학회 춘추학술대회 Vol.- No.-

대칭과 비대칭 인양작업 자세에 대한 생체역학적 요추부하 비교

양성환,최정화 한국생산성학회 2001 生産性論集 Vol.15 No.2

The purpose of this study was to quantitatively prove the asymmetric lifting acts on the risk factor of low back pain by a comparison of muscle activities of spinal loading and muscle strength(hand grip and back strength) between two types of lifting tasks (symmetric and asymmetric). Fourteen male subjects were participated in the experiment. We analysed and compared hand grip force, back strength. EMG(Electromyography), and IEMG (Integrated Electromyography) values for the stoop posture between symmetric and asymmetric lifting tasks using paired t-test. As the result, the back strength decreased in twisting posture. According to the result of EMG analysis, there were significant differences between right and left erector spinae muscle in asymmetric lifting task regardless of load. When subjects lifted boxes of right side, EMG values of left muscle were higher than those of right muscle. As twisting angle increased, EMG values of left muscle increased and EMG values of right muscle decreased. The results of IEMG analysis were similar to the results of EMG analysis. The results of EMG values during lifting indicated that the take-of stage was most stressful.

인간공학적 접근을 통한 어묵 제조업체의 작업관련성 근골격계 질환 유해요인 개선

양성환,조문선,강영식,Yang Sung-Hwan,Cho Mn-Son,Kang Young-Sig 대한안전경영과학회 2005 대한안전경영과학회지 Vol.7 No.4

The goal of this study is to propose the improved scheme that prevents the workers against musculoskeletal disorders at a fishcake manufacturing company, A questionnaire and an ergonomic assessment method were adopted to analyze the symptoms of workers' musculoskeletal disorders, and an analysis of working postures and a quantitative assessment on various processes were performed to find out harmful factors of workplace. Based on the result of the evaluation, to enhance the working environment, improvement of worktable, working space, tools, and outfit was suggested, and induction of mechanical system was also suggested. Suggested improvement plan was applied to the workplace step by step and it is confirmed that improvement plan can removes the injurious factors of musculoskeletal diseases effectively.

방화범의 심리상태

양성환,Yang, Seong-Hwan 한국화재보험협회 1983 防災와 保險 Vol.20 No.-

주요 외국의 산업안전보건 관리체계 고찰

양성환,최정화,갈원모 대한안전경영과학회 2002 대한안전경영과학회 학술대회논문집 Vol.2002 No.11

우리나라의 산업안전 ·보건 수준은 '81년 산업안전보건법이 제정됨으로써 획기적으로 발전하여, 80년대부터 산업재해 발생율이 감소추세를 보여왔다. 정부정책 측면에서 보면, '80년 이전까지는 주로 사후 보상문제에 치중하였고 산업안전보건법이 제정된 이후부터 본격적인 재해예방 정책이 수립 ·추진되기 시작하였다. 그러나, 이러한 변화 속에서 사업장 안전 ·보건관리 체계는 규제완화에 따른 안전보건관리체계 약화, 안전보건관리체계의 중복, 법집행의 실효성 미약, 공공-민간의 효율적인 역할 수행체계 미흡, 근로자의 참여부족 등 많은 문제점들을 안고 있다. 따라서 본 논문에서는 미국, 영국, 독일, 일본 등 우리보다 앞서있는 선진국의 산업안전보건체계를 재해통계제도, 안전보건 관련법, 재해예방기관의 활동 등의 측면에서 살펴보고 우리나라의 관리체계와 비교하여 개선 및 발전 방향을 모색하고자 하였다.

갯벌모르타르의 내화성능에 관한 실험적 연구

양성환,김희두 한국재난정보학회 2015 한국재난정보학회 논문집 Vol.11 No.4

As urbanization progressed along with quantitative expansion of the construction industry, concrete has developed diversely as a material that is the most extensively used in the construction industry. However, aggregate resources that are an essential element of concrete production are gradually being depleted and the phenomenon of aggregate shortage has been intensifying due to the reinforcement of regulations on environmental issues. Therefore, in the present study, environment friendly mortar was made by replacing aggregate with mud that is dumped when dredging sand is dumped. To identify the dynamic characteristics of the mortar and to identify its fire resistance efficiency, the mortar was heated and its residual compressive strength was measured. In the results, the residual compressive strength values of MM1, MM2, and MM3 were 45%, 95%, and 57.7% respectively and the mix MM2 showed the highest fire resistance efficiency. 건설산업의 양적팽창과 함께 도시화가 진행되면서 콘크리트는 건설재료로서 가장 많이 사용되는 재료로서 다양한 발전을 해왔다. 하지만 콘크리트를 제작하는데 필수 요소는 골재자원이 점진적으로 고갈되고 있으며며 환경문제에 대한 규제의 강화로 인해 골재부족현상은 갈수록 커지고 있는 실정이다. 이에 따라 본 연구에서는 준설토 투기로 인해 버려지는 갯벌을 골재로 치환하여 사용한 친환경 모르타르를 제작하여 그 역학적 특성을 규명하고 또한 내화성능을 확인하기 위해 가열을 한 뒤 잔존압축강도를 측정하였다. 그 결과 MM1, MM2, MM3의 잔존압축강도는 각각 45%, 95%, 57.7%의 강도를 발현하였으며 MM2의 배합에서 내화성능이 가장 우수한 것으로 나타났다.

자동차 유리 제조업에서의 설비개선 방안 연구 : 근골격계질환 예방중심 혼합 유전자 알고리듬

양성환,조문선 대한설비관리학회 2004 대한설비관리학회지 Vol.9 No.3

The goal of this study is to propose the improved scheme that prevents the workers against musculoskeletal disorders. A questionnaire and an ergonomic assessment method were adopted to analyze the symptoms of workers' musculoskeletal disorders, and an analysis of working postures and a quantitative assessment on various processes were performed to find out harmful factors of workplace. Based on the result of questionnaire that was obtained from the workers having the symptoms of musculoskeletal disorders, it was analyzed that 371 workers corresponding to 80.1% out of the total respondents suffered or currently suffers from an ache, tingle, and numbness. The result of QEC analysis shows that the waist and the shoulder are highly exposed to the risk of musculoskeletal disorders. In case of TRIM process of gluing glass, the degree of risk on the hands and wrists is high due to repeated operation of 1200 times per day in a pinch-grip posture. The result of RULA analysis shows that the factors of muscle and weight is comparatively less risky than those of a working-posture. It also shows that the risk of musculoskeletal disorders is highly influenced by a immoderate bend of shoulder, wrist, and neck. The result of OWAS shows that, with the exception of one posture, the highest level of "4" was recorded on all of working postures. This means that the relevant working posture is seriously injurious to musculoskeletal system Therefore, the immediate improvement of facilities and the fulfillment of prevention pro-gram of musculoskeletal disorders are required in relevant workplace.

LNG 施設의 防災對策 考察(Ⅰ)

梁成煥 社團法人 韓國火災學會 1987 한국화재소방학회논문지 Vol.1 No.1

LNG 施設의 防災對策 考察 (Ⅱ)

梁成煥 社團法人 韓國火災學會 1988 한국화재소방학회논문지 Vol.2 No.1

인간공학적 키보드의 수행도 및 자세 평가에 관한 연구

양성환,박범,최정화 한국산업안전학회 1999 한국안전학회지 Vol.14 No.4

The objective of this research is to review the ergonomic keyboard developed to prevent musculo-skeletal disorders from being occurred during keyboard work. It was studied by comparing it with the traditional keyboard after analyzing and comparing the trying performance and work advantages both the two keyboards. Twelve male subjects with no history of musculo-skeletal disorders participated in the experiment. The quantitative data such as trying speed, accuracy, performance time, and the number of typing errors were obtained from the HTT software that was adjusted for this experiment. RULA worksheet and the degrees of extension ulnar deviation on right and left wrist were used to analyze the upper body postures. The experiment results showed that the typing performance of the ergonomic keyboard decreased a little, but no significant difference statistically, compared with that of the traditional keyboard. On the work posture, the ulnar deviation during typing decreased in case of the ergonomic keyboard. But, the wrist extension was increased unexpectedly. Therefore, it can be regarded as these results occur due to the shape of wrist rest and the overall height of keyboard on a table. As a result, the reconsideration and redesign on the ergonomic keyboard are requested.