한손 수동물자취급에 관한 문헌 조사

모승민(Seung?Min Mo),곽종선(Jongseon Kwag),정명철(Myung?Chul Jung) 대한인간공학회 2010 大韓人間工學會誌 Vol.29 No.5

By referring thirty-seven previous studies on manual material handling (MMH), this paper analyzed guidelines and main factors of one-handed tasks. The previous studies concerned main factors of distance, weight, frequency, posture, gender, age, training, direction of force, height of the force exerted, and object shape and size. Based on these factors, the criteria used to understand one-handed tasks were objective measures of maximum strength, reaction force, etc., psychophysical measures of maximum acceptable frequency and weight, etc., and physiological measures of oxygen uptake, heart rate, electromyography, etc. An allowance threshold model regarding quantitative and objective fatigue and workload would be suggested for future research. This study would be expected that it serve to establish and Korean recommendations of one-handed tasks.

농작업 편이·안전 장비의 안전성 관련 연구 동향 분석

모승민(Seung-Min Mo),윤상영(Sangyoung Yoon) 대한인간공학회 2022 대한인간공학회 학술대회논문집 Vol.2022 No.10

A Suggestion of an Ergonomics Improvement based on the Risk Factor on Environment of Agricultural Work

Seung-Min Mo(모승민) 대한인간공학회 2018 대한인간공학회 학술대회논문집 Vol.2018 No.11

화학플랜트의 단위 작업별 근골격계 부담 유해요인 및 원인 조사: 사례조사 연구

이경선(Kyung-Sun Lee),모승민(Seung-Min Mo) 대한인간공학회 2019 大韓人間工學會誌 Vol.38 No.3

Objective: The purpose of this study is to evaluate precisely the hazard factors and causes of each work unit in the workers in chemical plant. Background: Due to the nature of the chemical plant, there was intermittent occurred the physical burdens during the period of checking, maintaining and repairing of production facilities. Therefore, these work units have high rates of the symptoms of work-related musculoskeletal disorders. However, these work units not classified as a musculoskeletal burdened work. Method: This study evaluated the physical intensity and frequency of work units using hazard survey. Based on these results, a field survey conducted on hazardous work units with a score of 8 or more in the risk assessment (intensity x frequency) score. And we evaluated the hazard factor such as awkward posture, repetition, excessive force, contact stress and vibration. Results: There were analyzed to 16 hazardous work units of the total 120 work units. For the support division, the hazardous work units were computing and material arrangement. Major risk factors were analyzed as awkward posture, insufficient space and repetition. For the development and operation division, the hazardous work units were using of jockey, B/A carrying, strainer carrying and bulk leak cleaning. Major risk factors were analyzed as awkward posture, excessive force and repetition. For the laboratory division, the hazardous work units were water quality analysis and sieve test. Major risk factors were analyzed as awkward posture and repetition. For the safety & environment, engineering division, the hazardous work unit was computing. Major risk factors were analyzed as long time static posture and insufficient space. Conclusion: Because of the high ratio of non-routinized work for nature of the chemical plant, it should be improved to the work for a high subjective workload. The results of this study suggested that the necessity of ergonomic improvement of nonroutinized work. Application: This study may help develop a system to effectively evaluate the hazard factor and workload for the non-routinized work in the area of petrochemical plants.

한글과 숫자 낱글자의 가독성에 미치는 주요 요인 평가

이인석(Inseok Lee),모승민(Seung?Min Mo),공용구(Yong?Ku Kong),송영웅(Young Woong Song),정명철(Myung?Chul Jung) 대한인간공학회 2009 大韓人間工學會誌 Vol.28 No.4

The purpose of this study was to evaluate the legibility of one-syllable Korean characters with the participation of sixteen subjects. The experiment considered nine factors including age (young and old), gender (male and female), illuminance (150lx and 600lx), viewing distance (50㎝ and 200㎝), material type (paper and LCD), typeface (Ming and Gothic), thickness (plain and bold), color contrast (black letter/white background and white letter/black background), and complexity (simple, complex, and number) to examine main effects with a 2<SUP>6-3</SUP>×3 fractional factorial design. The dependent variables were minimum character size of 100% correctness, maximum character size of 0% correctness, and minimum character size of comfortable reading preference. The results of analysis of variance (ANOVA) revealed that age, illuminance, viewing distance and complexity were significant for all dependent variables, except gender which was significant only for the minimum character size of comfortable reading preference. In general, the young could see twofold smaller size letters than the elderly. The subjects could see smaller sized letters with the illuminance of 600lx and viewing distance of 50㎝ than 150lx and 200㎝, respectively and also with numbers, simple characters, and complex characters in that order. The findings of this study could be characterized about the legibility of Korean characters and be good resources for developing its standard.

전자 제조업에서 광치료가 교대 근무자의 심박변이도에 미치는 영향

이인석(Inseok Lee),모승민(Seung-Min Mo) 대한인간공학회 2021 大韓人間工學會誌 Vol.40 No.6

Objective: The purpose of this study is to analyze heart rate variability on the light therapy for shift worker in electronics industry. Background: Although the shift work system could be improved productivity, it has been reported that the inconsistency of the circadian rhythm negatively affects worker"s health such as physical, psychological and psychosocial activities. Method: This study participated in eighteen female workers in their 20s and 30s. They have been working in shift for more than six months in the electronics manufacturing process. For the heart rate signal measured during work, heart rate signals were sampled in a continuous 60-minute interval within 120 minutes after the starting (early) and before ending (last) of the working period. This study evaluated the time domain heart rate variability (HRV) of Mean NN, SDNN, SDANN, SDNN index, RMSSD and pNN50. For the Wilcoxon signed-rank test, this study analyzed the significant difference between the HRV in the early and last of working period according to the light therapy. Results: For the non-light therapy group, there were significant difference of HRV of Mean NN, RMSSD and pNN50 between early and late of working period. These HRV were analyzed to be significantly increased in the late of working period than in the early work period. In non-light therapy group, most of HRV showed high variability. This reason is that worker"s psychological tension was alleviated in relation to the finish time at the late of working period. For the light therapy group, there were no significant difference of all HRV between early and late of working period. It showed that the light therapy group should keep maintained stability of autonomic nervous system compared to the non-light therapy group. Conclusion: This study suggested a method that the light therapy could be reduce variability in heart rated and improve stability for shift worker. And RMSSD and pNN50 of HRV could effectively evaluate the activation of the autonomic nervous system among HRV in the time domain. Application: Based on the result of this study, non-invasive light therapy could contribute to the prevention of occupational diseases and improving work quality in the shift work system.

의료 기기 사용자의 작업 분석 및 인간공학적 개선 : 이비인후과 진료 장치를 중심으로

정명철(Myung-Chul Jung),모승민(Seung-Min Mo) 대한산업공학회 2020 대한산업공학회지 Vol.46 No.2

Ergonomic Analysis of Human Error on the Stuck Accident in the Manufacturing Industry

Jae-Hee Park(박재희),Seung-Min Mo(모승민) 대한인간공학회 2021 대한인간공학회 학술대회논문집 Vol.2021 No.11

Objective: 본 연구의 목적은 제조업 분야에서 발생한 끼임 사고에 대해 인간공학적 측면으로 휴먼 에러를 분석하여 중대 재해 감소를 위한 개선안을 제시하는 것이다. Background: 제조업 분야는 작업자-기계 협업공정이 다수 있으며 이에 따라 끼임 사고의 발생 비율이 가장 높고 중대 재해 발생률이 매우 높다. Method: 본 연구는 2017~2019년 제조업 분야에서 끼임 사고로 발생한 사망 사고에 대해 휴먼 에러를 체계적으로 분석하였다. 산업안전보건공단의 200건의 사고사례 데이터베이스 및 중대재해 보고서를 기반으로 끼임 사고별 재해발생과정, 조사 내용, 재해발생 추정 등의 다양한 시나리오를 재구성하여 휴먼 에러 요소를 추정하고 사고별로 휴먼 에러 항목을 코드화 하였다. 휴먼 에러를 체계적으로 분석하기 위해 휴먼 에러 형태(primary error, secondary error, command error), 작업자 행동 분류 (omission, commission, sequence, timing, extraneous, reflection), 정보처리 에러 (mistake, slip, lapse, violation)로 구분하여 코드화 하였다. 사고별로 코드화된 휴먼 에러 분류에 따라 년도별로 빈도 높은 휴먼 에러를 분석하였다. Results: 휴먼 에러 형태에 따라 분석한 결과 대부분 작업자 및 작업환경에 의해 발생한 오류인 primary error (47.5%) 와 secondary error (51.9%)에 의해 사고가 발생하는 것으로 분석되었다. 작업자 행동 분류에 따라 분석한 결과 수행해야 할 작업 단계를 생략하거나 잘못 수행한 오류인 omission error (82.4%)와 commission error (15.2%)에 의해 사고가 발생하는 것으로 분석되었다. 정보처리 에러에 따라 분석한 결과 규정을 준수하지 않는 violation (46.8%)이 가장 높게 나타났으며 slip (35.4%), mistake (17.8%) 순으로 분석되었다. Conclusion: 제조업 분야는 컨베이어, 크레인, 공작기계 등의 다양한 산업 기계와 협업하여 작업을 수행한다. 이에 따라 기계 방호 및 작업 안전 등의 기계안전의 규정을 준수하는 것이 매우 중요하다. 본 연구에서 분석한 끼임 사고의 발생 원인은 작업자가 작업절차, 안전 규정 등은 알고 있지만 작업 절차 상 무시하고 위반하기 때문에 ‘알지만 이행하지 않는’ 휴먼에러가 다수 발생하는 것으로 파악되었다. 따라서 본 연구 결과를 기반으로 끼임 사고를 방지하기 위해 빈도 높은 휴먼 에러에 대한 집중 관리 및 교육·훈련이 필요할 것으로 판단된다. 또한 기계 주의 알람, 규정미준수 시 작업 정지, 모니터링, 규정 강화 등의 대책으로 불안전한 행동 및 상태를 제거하여 지속적으로 휴먼 에러를 감소시키기 위한 개선이 필요하다.

산업용 그레이팅 형태에 따른 보행 시 하지 부위 근피로도 평가

정명철(Myung-Chul Jung),모승민(Seung-Min Mo) 대한산업공학회 2017 대한산업공학회지 Vol.43 No.4

은편리 진화산방

설계 투닷건축사사무소(Todot Architects and Partner),조병규(Cho Byung Kyu),모승민(Mo Seung Min) 현대건축사 2022 월간 CONCEPT Vol.- No.283