휠체어 사용자의 Universal Access를 위한 시설 접근성 연구

진상은 ( Sangeun Jin ),유영미 ( Youngmi Yoo ),이준희 ( Junhee Lee ),박원구 ( Wongu Park ) 한국안전학회(구 한국산업안전학회) 2018 한국안전학회지 Vol.33 No.4

Objective: The current study aimed to investigate the accessibility and usability of the disabled person while using the everyday facility. Background: The national laws regulated accommodation of persons with disabilities, but our knowledge on the practical usefulness of the laws and acceptance by the users is still far from complete. Method: Compliance with laws was checked throughout the actual measurement of 87 engineering designs in the facilities of a national university, and the practical usability of the facilities was investigated by in-depth interviews with eight disabled persons. New design solutions were developed by the anthropometric methodology for better accommodation. The target-specific anthropometry database such as sitting knee height with wheelchair was employed. Results: First, the statistic showed that 28.7% of facility designs comply with the law, 29.9% of facility designs doesn't comply with the law, and 41.4% of facility designs doesn't have related law or regulation. Second, the law of table height(71cm in current) can accommodate only 49.3% of wheelchaired population. The following test for 95% accommodation revealed that the table with 80cm high is required. Third, the current law in the door width(90cm) can only accommodate 82.6% of disabled persons, so the new design solution was calculated and suggested that 100cm in the door width is necessary for 99% accommodation of disabled persons. Conclusion: Even with the laws and regulations for the disabilities it was clear that the accessibility and usability of the disabled persons in everyday facilities was still limited. An investigation for the new solutions about a wide range of facilities is necessary for better practical accessibility and usability of the handicapped persons. Application: The results of current study can be a basement of developing a new guideline or regulation of the facility design for the disabled persons.

방송 제작 특성에 기반한 유해위험요인 분석

남연경,진상은,이종빈,김경우,나민오,Nam, Yun Kyung,Jin, Sangeun,Lee, Jong-Bin,Kim, Kyungwoo,Na, Minoh 한국안전학회 2020 한국안전학회지 Vol.35 No.2

Due to various industrial accident that occur to the staff in the broadcasting production sites, the issue of safety at the broadcast production site is becoming a social issue. Nevertheless, not many researches have been carried out on the actual conditions of the staff's production environment and its safety issues. Therefore, the purpose of this study was to prepare a countermeasure based on engineering knowledge by analyzing working environment to improve the poor working environment of staff. First, this study analyzed statistical data of industrial accidents over the past five years to find out the current status of disasters at broadcasting production sites. As a result, the intensity of the accident was not weak in that the loss days was more than one month in 85% of accident. In addition, the type of accident was high in the fall/trip accidents. Second, this study visited 10 broadcasting production sites for risk assessment. By analyzing the characteristics of the working environment and 104 questionnaires, we predicted the types of accidents that can occur in the broadcasting production site. As a result, accident types such as fall, collision, and trip were relatively high, similar to the characteristics of construction site. Third, it was possible to quantify the scale of the risk in the broadcasting production, and as a result, the quantity of temporary structure and accident risk were proportional. In other words, this study analyzes broadcasting work environment and defines risk factors based on safety engineering knowledge. Finally, this study suggested a guideline to improve the safety of the broadcasting production site.

작업 조건에 따른 택배 배송 작업가능시간에 관한 연구

김하영(Hayoung Kim),진상은(Sangeun Jin) 대한인간공학회 2022 대한인간공학회 학술대회논문집 Vol.2022 No.10

인지적 작업부하에 따른 경추부 근육 활성도 정량화에 관한 연구

김수환(Suhwan Kim),진상은(Sangeun Jin) 대한인간공학회 2022 대한인간공학회 학술대회논문집 Vol.2022 No.10

안전보건표지판의 인식률 향상을 위한 평가 및 개선안 도출

김슬기(Seulgi Kim),진상은(Sangeun Jin),남연경(Yeonkyung Nam) 대한인간공학회 2020 大韓人間工學會誌 Vol.39 No.2

Objective: The goal of this study was to identify the recognition rate of the safety signs used to communicate the risk in industry, and to improve the safety signs revealed to have low recognition rate. Background: The safety signs are used to communicate the existence of risk throughout the symbols regardless of the worker"s knowledge level. Especially, the importance of the pictogram is emphasized by the increase of foreign workers. However, there has been no study testing and improving recognition rate of the safety signs. Method: A total of seven safety signs were selected for further improvement based on a series of tests suggested by ISO 9186 (Graphical symbols) which requires more than 66% of recognition rate to use the safety signs. Then, the safety signs were improved by a guidance provided by the AIGA (American Institute of Graphic Arts). Finally, the rank tests were performed on the various designs to select three alternative designs for each sign, which is best to describe the meaning of each safety sign. Finally, a survey was conducted to select the final improvement safety sign among the three improvement designs for each eight signs. Results: As a result, six safety signs (emergency exit, corrosive warning, lift no boarding, machine /equipment no boarding, sensitive material warning, green cross) showed an increase in understanding and achieved 66% of the recognition rate suggested by ISO. However, two safety signs (no object movement, laser beam warning) confirmed the need for further improvement. As a result of analyzing the difference in understanding before and after the improvement of the safety signs, the "no object movement" sign increased 13.25% from the recognition rate of 0% before improvement, but did not meet the ISO standard, and the "laser beam warning sign" decreased in understanding rate. Conclusion: In this study, the design of eight safety signs was improved. The design of the six safety signs, except for "no object movements" and "laser beam warnings", could significantly increase the comprehension rate, when used in actual industrial sites. Application: The results could be used to prevent the industrial accidents by providing a better understanding of the safety signs.

택배 근로자 배송 작업의 부하 정량화

김하영(Hayoung Kim),김슬기(Seulgi Kim),진상은(Sangeun Jin) 대한인간공학회 2022 대한인간공학회 학술대회논문집 Vol.2022 No.4

장시간 입식-좌식 작업대 사용 전략에 따른 생체역학적 변화 분석

김슬기(Seulgi Kim),추한박(Hanbo Zou),진상은(Sangeun Jin) 대한인간공학회 2020 대한인간공학회 학술대회논문집 Vol.2020 No.10

Objective: This study investigated the changes of muscle activation and body kinematics while using dynamic sitting and sit-standing workstation. Background: Although the sit-standing workstation and dynamic sitting strategy environment are an effective way to reduce the biomechanical loads in prolonged static posture, there have been no studies comparing the two conditions for prolonged scenario. Method: A total of 12 healthy participants were recruited and asked to change postures in every 15 minutes (total 60 minutes), while using a computer without any restriction. Each participant visited twice to test ‘sit-semi standing’ (dynamic sitting) and ‘sit-standing’ conditions. Muscle activation was measured in lumbar elector spinae(LES), rectus abdominis(RA), and gluteus maximus(GM), and the center of pressure(CoP) was captured by a forceplate and used to calculate standard deviation in M-L direction and A-P direction, and sample entropy. The body kinematic was captured by a motion capture system and used to calculated lumbar flexion angle. Results: LES showed significant differences in 10, 50, and 90%ile NEMGs in which the "sit-standing" showed greater activation patterns than in "sit-semi standing". In addition, the ‘sit-standing’ condition showed a broader distribution of NEMG than the ‘sit-semi standing’ condition denoting unexpected motions in the standing workstation. GM showed a significant interaction between Conditions and Time in 10, 50, and 90%iles NEMGs, and revealed significantly greater muscle activation in "sit-standing" than in "sit-semi standing". In addition, the movement of CoP was significantly bigger in "sit-standing" than "sit-semi standing", but complexity of movement captured by the sample entropy was significantly smaller in "sit-standing" revealing a simple and patterned movement but bigger movement in the ‘sit-standing’ condition. Conclusion: ‘Sit-semi standing’ showed more positive biomechanical evidences than ‘sit-standing’ for reducing the discomfort of the body in an office environment. Application: The office chair should be designed for providing various sitting postures including ‘semi-standing’ in which a larger trunk-knee angle and a smaller knee angle are required.

A biomechanical study on the effect of high-heels with backpack

Seulgi Kim(김슬기),Yee Yeng Liau(료이잉),Sangeun Jin(진상은) 대한인간공학회 2020 대한인간공학회 학술대회논문집 Vol.2020 No.6

Effects of non-driving-related task characteristics on the take-over response of the conditionally automated driving

Jimin Jeong(정지민),Seulgi Kim(김슬기),Sangeun Jin(진상은) 대한인간공학회 2021 대한인간공학회 학술대회논문집 Vol.2021 No.11

Objective: This study aimed to investigate the difference in take-over response according to non-driving-related task (NDRT) modalities under conditionally automated driving condition. Background: Previous studies have tested standardized and non-standardized NDRTs to understand driver’s response and provide knowledge in designing automated vehicle interface, but our understanding of the effect of NDRT modalities characterized by Eyes Off, Hands Off, and Mind Off is still far from complete. Method: Ten participants were asked to drive a conditionally automated driving simulator in which various NDRTs (Hand Off, Mind Off, Hand Off + Mind Off, Eyes Off + Mind Off, Eyes Off + Hands Off + Mind Off) were preprogramed. While driving at autonomous condition, a take-over request (ToR) was occurred, and the system control was transferred into the manual driving within 10 sec ToR limit. The dependent variables included take-over reaction time (ToRT), gaze reaction time (GRT), lane change time (LCT), horizontal gaze dispersion (HGD). Results: First, under Eyes On conditions, results showed significantly faster ToRT and GRT, but there was no significant difference in LCT. Second, the Hands On conditions did not give any significant influence on the take-over responses. Third, the Mind Off conditions also did not show significant changes in the take-over responses. Conclusion: Under the ToR condition in autonomous driving, visual monitoring of ambient environment was most important in quality of the take-over responses. Application: The NDRTs in autonomous vehicle should be designed to employ non susceptible conditions such as Hands Off and Mind Off.

사고 보고 활성화를 위한 사고 미보고 원인 분석

이일석(Ilseok Lee),김범수(Beom Soo Kim),진상은(Sangeun Jin) 대한인간공학회 2019 大韓人間工學會誌 Vol.38 No.6

Objective: The goal of current study was to investigate the main reasons of unreported accidents in a view point of system, person, and working environment. Background: Various accidents could happen anytime and anywhere of the industrial sites. Regardless of the accident severity and type, industry have been emphasized the importance of accident reporting to prevent a severe accident in future. Despite of the effort to increase the accident report, numerous numbers of near-misses and minor accidents were not reported in various reasons. Method: The current study was conducted with a questionnaire, consisted of three main question and 22 sub-questions asking about the reason of the unreported accidents. Total 763 workers at a chemical company in Republic of Korea answered the questionnaire. Results: In both 2016 and 2018, more than 80% of workers agreed the sentence that the accident must be reported. Regardless of the individual"s perception on the accident reporting (e.g., agree, disagree and hesitate) and the position of workers (e.g., employee, manager and supervisor), the followings were selected as non-reporting reasons: 1) when workers judged that the incident can be solved by themselves; 2) when workers believed that the damage is minimal; 3) when the worker judged that the accident reporting increases workload; 4) when the report took a lot of time to complete form; and 5) when the reporting system was complex. Especially, most workers responded that the main reason of avoiding accident reporting was when workers believed that the accident could be immediately solved and trivial. In contrast, for the workers who were aware that the accident report is not necessary, the extra time required to report the accident was one of the main reason of unreported accident. Conclusion: The company could concentrate on the training of workers explaining the effectiveness and importance of accident reporting for having a leading indicator of accidents, and could be able to develop and provide an easier way of the accident reporting system. Application: The results of this study could be used to enhance the safety culture of a company by using the result in the safety education or advertisement.