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신규식,김태훈,정현희,조수헌,이경호,Shin, Kyu-Sik,Kim, Taehun,Jung, Hyun Hee,Cho, Soo-Hun,Lee, Kyoungho 한국산업보건학회 2017 한국산업보건학회지 Vol.27 No.3
Objectives: It is difficult to identify exposure factors in the semiconductor industry due to low exposure levels to hazardous substances and because various processes take place in fabrication (FAB). Furthermore, a single worker often experiences a variety of job histories, so it is difficult to classify similar exposure groups (SEG) in the semiconductor industry. Therefore, we intend to develop a new exposure index, the period of working in FAB, that is applicable to the semiconductor industry. Methods: First, in specifying the classification of jobs, we clearly distinguished whether they were FAB workers or non-FAB workers. We checked FAB working hours per week through questionnaires administered to FAB workers. We derived an exposure index called FAB-Year that can represent the period of working in FAB. FAB-Year is an index that can quantitatively indicate the period of working in FAB, and one FAB-Year is defined as working in FAB for 40 hours per week for one year. Results: A total of 8,453 persons were surveyed, and male engineers and female operators occupied 90% of the total. The average total years of service of the subjects was 9.7 years, and the average FAB-Year value was 6.8. This means that the FAB-working ratio occupies 70% of total years of service. The average FAB-Year value for female operators was 8.4, for male facility engineers it was 7.7, and for male process engineers it was 3.5. A FAB-Year standardization value according to personal information (gender, job group, entry year, retirement year) for the survey subjects can be calculated, and standardized estimation values can be applied to workers who are not participating in the survey, such as retirees and workers on a leave of absence (LOA). Conclusions: This study suggests an alternative method for overcoming the limitations on epidemiological study of the semiconductor industry where it is difficult to classify exposure groups by developing a new exposure index called FAB-Year. Since FAB-Year is a quantitative index, we expect that various approaches will be possible in future epidemiological studies.
차압식 유량계를 실장을 위한 Single Capacitive Type Differential 압력 센서 개발
신규식,송상우,이경일,이대성,정재필,Shin, Kyu-Sik,Song, Sangwoo,Lee, Kyungil,Lee, Daesung,Jung, Jae Pil 한국마이크로전자및패키징학회 2017 마이크로전자 및 패키징학회지 Vol.24 No.1
In this paper, we have developed a differential pressure flow sensor designed as a single capacitive type. And the sensor was fabricated using a MEMS process. Differential pressure flow sensors are the most commonly used sensors for industrial applications. The sensing diaphragm and bonding joint of the MEMS pressure sensor are easily broken at high pressure. In this paper, we proposed a structure in which the diaphragm of the sensor was not broken at a pressure exceeding the proof pressure, and the differential pressure sensor was designed and manufactured accordingly. The operating characteristics of the sensor were evaluated at a pressure three times higher than the sensor operating pressure (0-3 bar). The developed sensor was $3.0{\times}3.0mm$ and measured with a LCR meter (HP 4284a) at a pressure between 0 and 3 bar. It showed 3.67 pF at 0 bar and 5.13 pF at 3 bar. The sensor operating pressure (0-3 bar) developed a pressure sensor with hysteresis of 0.37%. 최근 계측기의 소형화, 전자화에 따라 차압식 유량계의 경우 기존에 기계가공을 통해 개발하던 센서부를 전자식 MEMS 차압센서로 대체하려는 많은 노력이 있으나, MEMS 차압센서의 경우 고압이 인가시 실리콘 다이아프램의 파괴 및 센서의 접합부의 파괴가 발생하는 문제점이 있다. 따라서 본 논문에서는 proof pressure 이상의 압력에서 센서의 다이아프램이 파괴되지 않는 구조를 제안하였으며, 그에 따른 차압식 압력센서를 설계 및 제작하였다. 센서 동작압력(0-3 bar)의 3배 이상의 압력에서 센서의 동작특성을 평가하였다. 개발된 센서는 $3.0{\times}3.0mm$이며, 0~3 bar 사이의 압력에서 LCR meter (HP 4284a)로 측정한 결과 3.67 pF at 0bar, 5.13 pF at 3 bar를 나타내었으며, 센서의 동작압력(0-3 bar)에서 0.37%의 hysteresis를 나타내는 압력센서를 개발하였다.
신규식(Shin, Kyoo-Sik),최회련(Choi, Hoe-Ryeon),이홍철(Lee, Hong-Chul) 한국산학기술학회 2015 한국산학기술학회논문지 Vol.16 No.9
기후변화 및 환경오염에 대응하기 위해 신재생에너지 정책 연구가 증가하고 있다. 신재생에너지는 녹색산업과 녹색 기술로 대표되는 새로운 성장 동력 기술이다. 현재 우리나라는 태양광, 풍력, 수소연료전지 등 3대 전략부분에 신재생에너지 보급 및 기술개발사업에 대한 투자가 이루어지고 있지만 아직은 초기 단계로, 연구 방향 및 투자 분야에 대한 불확실성을 줄이는 것이 무엇보다도 시급한 실정이다. 따라서 본 연구는 빅데이터(big data) 분석방법 중 텍스트 마이닝(Text mining method)과 토픽 모델링 기법(multinominal topic model)을 신재생에너지와 관련된 최근 10년간의 우리나라 언론기사에 적용 하여 국가 정책의 핵심이슈 및 세계적인 연구 트렌드를 분석하고, 성장 가능성이 있는 신재생에너지 분야를 예측하였다. 정보 통신기술을 바탕으로 한 연구결과는 신재생에너지 분야에 활발히 적용될 것으로 예측된다. To respond the climate change and environmental pollution, the studies on renewable energy policies are increasing. The renewable energy is a new growth engine technology represented by the green industry and green technology. At present, the investments for the renewable energy supply and technology development projects of three main strategy sectors such as sunlight, wind power and hydrogen fuel cell are implemented in our country, while they are still in the early stage, accordingly reducing those uncertainty for the research direction and investment fields is the most urgent issue among others. Thus, this study applied text mining method and multinominal topic model among the big data analysis methods on our country's newspaper articles concerning the renewable energy over the last 10 years, and then analyzed the core issues and global research trend, forecasting the renewable energy fields with the growth potential. It is predicted that these results of the study based on information and communication technology will be actively applied on the renewable energy fields.
역사적 감각을 반영한 지하철역사 쇄신과 장소성 복원에 관한 연구 -광희문성곽일대의 복원과 연계한 동대문역사문화공원역의 제안을 중심으로-
신규식(Shin, Kyu Sik),구영민(Koo, Young Min) 대한건축학회 2019 대한건축학회 학술발표대회 논문집 Vol.39 No.2
The study departs from the criticism on the historical restoration heading for inextinguishable Antiquity under the cloak of recovering the urbanity, which eventually resulted in uncultured and ahistoric conduct destroying individual memory of the city for having collective and political urban identity. Targeting a deteriorated residential area located between the Dongdaemun Design Plaza and the Gwangheemun Fortress Park that has been restored in the extention of the Dongdaemun fortress Park, the study attempts to develop programs that represent the presence of the past by linking the fragments of old castle with the neighboring subway stations, to graft the pattern of real life into the historical site, and finally to propose an alternative scheme that makes the history itself turn into the present urban fabric.
나선형 마이크로/나노 로봇의 규모와 표면특성이 유영에 미치는 영향에 관한 수치적 연구
신규식(Gyu Sik Shin),조기영(Ki Yeong Jo),김영웅(Young Woong Kim),양시영(Si Young Yang),김형민(Hyung Min Kim) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
This study analyzed the swimming characteristics of helical micro/nano robots in the no-slip condition and the slip condition. For the micro/nano scales with Knudsen number greater than 0.01, the Maxwell slip model was applied to analyze the effect of slip on the wall. Micro/nano swimming robot with a large Knudsen number had a large slip effect, which caused the swimming speed to be relatively slow. Meanwhile, the flow characteristics were analyzed considering the effects of hydrophilicity and hydrophobicity on slip. We found that even if the Knudsen number is constant, when the surface effect of the swimming robot is hydrophilic, the propulsion force increases compared to the case of hydrophobicity. The propulsion efficiency also demonstrated the same trend as the swimming speed, and the maximum efficiency was 0.097%, which is the efficiency of the no-slip condition on the wall.
나선형 마이크로/나노 로봇의 규모와 표면특성이 유영에 미치는 영향에 관한 수치적 연구
신규식(Gyu Sik Shin),조기영(Ki Yeong Jo),김영웅(Young Woong Kim),양시영(Si Young Yang),김형민(Hyung Min Kim) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
This study analyzed the swimming characteristics of helical micro/nano robots in the no-slip condition and the slip condition. For the micro/nano scales with Knudsen number greater than 0.01, the Maxwell slip model was applied to analyze the effect of slip on the wall. Micro/nano swimming robot with a large Knudsen number had a large slip effect, which caused the swimming speed to be relatively slow. Meanwhile, the flow characteristics were analyzed considering the effects of hydrophilicity and hydrophobicity on slip. We found that even if the Knudsen number is constant, when the surface effect of the swimming robot is hydrophilic, the propulsion force increases compared to the case of hydrophobicity. The propulsion efficiency also demonstrated the same trend as the swimming speed, and the maximum efficiency was 0.097%, which is the efficiency of the no-slip condition on the wall.