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- 저자 : 갈원모 ( Won Mo Gal ) (검색결과 25 건)
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휴먼에러 저감을 위한 도시철도 운전실 레이아웃 표준화 연구
갈원모 ( Won-mo Gal ),염병수 ( Byeoung-soo Yum ) 대한설비관리학회 2021 대한설비관리학회지 Vol.26 No.2
Currently, locomotive cabs' layout differ depending on the type of train vehicles. In order to reduce human error of drivers, systematic research including analysis of the working conditions of urban railroads in Korea and standardization measures are needed accordingly. Through the survey of 247 drivers working Seoul Metro Lines 1, 2, 3 and 4 and interview with related experts, we will identify areas of vulnerability in the driver human error. Many drivers felt uncomfortable with the distinction between the handling buttons, the distance between switches, the movement and function, and the arrangement by operation frequency, It was also able to identify difficulties in identifying the display and operation by color and symbol when handling the control device, as the viewing range and physical conditions differed.
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휴먼에러 사고분석을 통한 DMI프로그램개발에 관한 기초연구
갈원모 ( Won-mo Gal ),염병수 ( Byeoung-soo Yum ),권우택 ( Woo-taeg Kwon ) 대한설비관리학회 2016 대한설비관리학회지 Vol.21 No.4
With a goal to establish a human error prevention system, the Ministry of Land, Infrastructure and Transport is currently devising a countermeasure to minimize human errors by establishing a railway safety innovation plan with key contents including national R&D expansion for railway safety technology development. Rolling stocks are playing a pivotal role among Korea`s urban transportation and also as a distinct means of public transportation. However, the layout inside a train operating room, such as locations and operating methods of devices, is differently designed according to the types of rolling stocks, operational tracks, signaling methods and display installation. This leads to a failure in prompt handling of unexpected situations and, accordingly, frequent occurrence of human errors that lead to accidents. Therefore, it is becoming urgently necessary to ensure safety for railway transportation. This study was aimed at developing a DMI program through accident analysis for the purpose of human error accident prevention.
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갈원모 ( Won Mo Gal ),손기상 ( Ki Sang Son ) 대한설비관리학회 2009 대한설비관리학회지 Vol.14 No.2
Questionnaires have been distributed to the engineers who are currently working at building construction sites. The survey result has been introduced to determine reasonable cost for safety management. Questionnaire contains items that safety managers are asked for which one is reasonable question, in the survey. Throughout this survey, rate dependant variable, amount size independent variable are established for regression analysis to derive a model. It is found that significant level. Therefore, nonlinear regression model is shown. In the study, it is considered that safety cost rate is decreased, while with amount being increased. It is analyzed how much safety cost the field managers actually uses at their construction sites, based on site and amount of each project. Respondents are limited to the field engineers who have more than five year field experience. And responding items having many errors have been removed. They are classified as shown on in table(4). The items are questioned in the range of floor level such as 10th or less, 15fl, 20fl, 25fl, 30fl, 35fl, 40fl, 50fl, 53fl, more than 50fl; buildings in one site such as less than two, 2~5bldgs, 5~10, 10~15, 15~20, 20~25, 25~30, 30~35, 35~40, for more than 40bldgs; project amount such as ten million USD, 20 mil lion USD, 30 mil lion USD, 50 mil lion USD, 100 mil lion USD, 200 mil lion USD, 300 mil lion USD, 400 mil lion USD, 500 mil lion USD, more than 500 ml lion USD. The existing statistic package program was used for extracting out the most reasonable regression equation appropriate for the rate of each project. It is shown that results from multi regressions analysis deviated from significance level and correlation ship, so that they can not be put into practical use. And, divergence shape shows that they can be reasonable as shown in table 3. Another approach general method also has been introduced to the study in order to verify the reasonability of the previous one. It is shown that the new formula that encompasses the variables of building sizes and floors can not be reasonably applied to practical field situation due to the actual cost discrepancies at sites. They are the reasons why there might be many buildings with usually more than ten stories high. Therefore, safety management cost can be considered more practical, rather than theoretical. It is thought that only project amount-based equation with r-square 98.5 and p value 0.0000 can be applied to determine safety management cost for building work. More verification using current rate system has been made in order to compare and analyze as shown in determination model of safety management cost by each project type. First, each project amount on the questionnaire survey has been used in verifying the model which is made in the study, such as 100 billion USD or less, 200 billion USD, 300 billion USD, 500 billion USD, trillion USD, 2 trillion USD, 3 trillion USD, 4 trillion USD, 5 trillion USD, 8 trillion USD. For example, rate comparison between current one and new system for such as apartment, office, hospital, mart buildings are shown in table 10 in the building work. The first questionnaire survey contains size, number of floors and buildings and project amount of apartment building, office building, in making new modes. Simple and multi regression equations have been made to verify their practical efficiency, using two apartment project cases (15, 20 stories) and one office building with 58 stories. Generally, Excel function equations have some errors when they are practically verified. But it is proved that the applicability of log functions is practical. It is analyzed that the existing rates do not satisfactorily cover needs in the actual field situation. Current rates consider only project type without consideration of independent variables of project amount, size efficiently. Some conclusions are summarized as follows: It is found that estimation model, based on the project amount rather than size as shown on the current cost rate system, can be more useful and significant, statistically and practically. Buildings such as apartment, office building and hospital, should be classified as a new group for application a new model of cost rate in accordance with occupational safety and health law. Modification on the existing rate should reflect a sense of reasonability. New models can be alternatives of the existing one.
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Sampling-based Super Resolution U-net for Pattern Expression of Local Areas
이교석,갈원모,임명재,Lee, Kyo-Seok,Gal, Won-Mo,Lim, Myung-Jae The Institute of Internet 2022 한국인터넷방송통신학회 논문지 Vol.22 No.5
본 연구에서는 U-Net, 잔차 신경망, 서브 픽셀 컨볼루션을 기반으로 새로운 초해상도 신경망을 제안한다. U-Net의 최대 풀링으로 인해 세부적인 정보의 손실이 일어나는 것을 막기 위해 서브 픽셀 컨볼루션을 활용한 다운 샘플링 그리고 연결을 제안한다. 이는 필터 안의 최대 값만으로 새로운 피처맵을 만드는 최대 풀링과 다르게 필터 안의 모든 픽셀을 사용한다. 2×2 크기의 필터가 지나가면서 왼쪽 위, 오른쪽 위, 왼쪽 아래, 오른쪽 아래의 픽셀들로만 이루어진 피처맵을 만든다. 이를 통해 크기가 절반이 되고, 피처맵이 개수가 4배가 된다. 그리고 연산량을 줄이기 위해 두 가지 방법을 제안했다. 첫 번째는 U-Net의 업 컨볼루션 대신 연산량이 없고, 성능이 더 좋은 서브 픽셀 컨볼루션을 사용한다. 두 번째는 U-Net의 연결 층 대신 두 피처 맵을 더하는 층을 사용한다. 밴치 마크 데이터 세트로 실험한 결과 스케일 2의 set5 데이터를 제외하고 모든 스케일 및 벤치마크 데이터 세트에서 더 나은 PSNR 값을 보여주고, 국소부위의 패턴을 명확하게 표현할 수 있었다.
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고소작업대 작업절차 개선에 관한 연구 -Table Lift 중점으로-
민용철 ( Yong Cheol Min ),갈원모 ( Won Mo Gal ) 대한설비관리학회 2014 대한설비관리학회지 Vol.19 No.1
This paper deals with successful management program for table lift and NCR of using to improve more safer working process. By carrying out a survey for different types of handling lever, this program shows to improve on human factors and safety assessment. It is essential to improve practical process of suitable site so it is able to manage the equipment as safe way.
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