IoT 기반의 건설현장 미세먼지 모니터링 시스템 개발에 관한 연구

김현식 ( Kim¸ Hyunsik ),태성호 ( Tae¸ Sungho ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2

Recently, particulate matter(PM) caused by internal factors such as industrialization and urbanization as well as external factors such as Asian dust is a serious problem in Korea. In particular, while the emission due to construction appears to be very serious among the internal factors, it is necessary to manage PM in consideration of the characteristics of construction sites. Accordingly, in this study, a PM management system suitable for construction sites was developed to reduce civil complaints caused by PM and to minimize damage to field workers and nearby residents by supporting the fine dust management system of the state and local governments. The factors to be considered when measuring PM due to the specificity of construction sites were considered, and the system components were developed based on the considerations. As a result, an IoT based construction site PM monitoring system (CPMS) that integrates each component was established.

장약에 기반한 포병탄 EFD 산출 모형에 관한 연구

김현식,마정목,Kim, Hyunsik,Ma, Jungmok 한국시뮬레이션학회 2019 한국시뮬레이션학회 논문지 Vol.28 No.1

무기효과 산출을 위해 모델링 및 시뮬레이션 방법을 많이 사용하고 있다. 포병탄에 대한 무기효과 산출도 일부 진행되었으나, 장약의 선택에 따른 영향에 관한 연구는 부족하였다. 따라서 본 논문에서는 장약에 기반한 포병탄 EFD 산출모형을 제시하고, 장약의 선택에 따른 3차원 건물표적에 대한 무기효과의 차이를 확인하고자 한다. 우선 산출모형의 입력데이터를 수집하고, 제시한 모형을 이용하여 요망효과 달성을 위한 발사탄수를 산출하였다. 마지막으로 제시된 모형의 검증을 위해 대응표본 t-검정을 실시하였다. Modeling and simulation(M&S) method are used to quantify the weapon effectiveness. The weapon effectiveness of artillery shells was also partially studied, but there was a lack of research on the effects of the choice of charge. Therefore, this paper presents an artillery shell's EFD(Expected Fractional Damage) calculation model based on the charge and identifies differences in the weapon effectiveness of 3D building targets according to the selection of the charge. First, the input data of the calculation model was collected and a required number of shoots was calculated to achieve the desired effects using the proposed model. Finally, a paired sample t-test was conducted to verify the proposed model.

공사장 미세먼지 모니터링을 위한 광산란 센서의 습기 영향 연구

김현식(Kim, Hyunsik),김정환(Kim, Jeonghwan),박원영(Park, Won-young) 대한토목학회 2022 대한토목학회 학술대회 Vol.2022 No.10

운전자의 안전과 편의성을 고려한 차량 제작

김현식(Hyunsik Kim),정진호(Jinho Jung),이동원(Dong-Won Lee),김준석(Joonseok Kim),이재형(Jaehyung Lee),임석연(Seokyeon Im) 한국자동차공학회 2016 한국자동차공학회 지부 학술대회 논문집 Vol.2016 No.10

Recently, many people begin to increase hobby which pursuit more thrill than comfortable. For example, car offers people to request the thrill and exiting hobby. People who enjoy motor sports have increased. Because some equipments are too expensive, Many people don"t enjoy motor sports. Therefore Team S.E.C-TU made some students who enjoy motor sports to product vehicle. On this year, Our TU7, we designed of vehicle, vehicle production also attempted to do. we especially focused on improving the dynamic performance of vehicle, frame stability and driver comfort. Therefore, Our off-load vehicle ‘TU7’ is well coincident with the purpose of ‘2016 BAJA SAE KOREA at Yeungnam University’.

ESS의 화재발생 시 비상행동 가이드라인에 관한 연구

김현식(Kim Hyunsik),노일래(Il-Rae Noh),이일무(Il-Moo Lee),이재윤(Jae-yoon Lee),김홍기(Kim Hongki),박천수(Park Chunsoo),이찬희(Chan-hee Lee) 대한전기학회 2022 대한전기학회 학술대회 논문집 Vol.2022 No.10

정부 선정영향력이 기술발전 프로세스에 미치는 영향 분석

김현식(Hyunsik Kim),배성주(Sung Joo Bae),한상연(Sangyun Han) 한국혁신학회 2018 한국혁신학회지 Vol.13 No.4

본 연구는 우리나라와 같은 선진국을 추격하는 국가에서 기술발전에 정부가 어떤 영향을 미치는지 살펴보기 위하여 정부의 선정영향력이 어떤 요인에 의해 결정되고 민간 영역에 어떻게 연계되어 기술발전을 이끌어주는지에 대한 영향을 분석하고자 하였다. 이는 정부선정영향력의 발생과 확산 과정은 제도적 환경에 기반한 정부의 선정영향력이 기술분야별 투자전략을 결하는 과정에서 나타나며(selection), 정부의 선정영향력은 적합한 탐색 전략에 따라 공동 탐색과 학습 과정을 거쳐 민간영역의 연구개발활동에 영향을 주는 형태로 진행(variation)되는 과정을 거치는 것을 보여주고자 한다. 이를 위하여 국가연구개발사업 조사분석 자료 연 단위 284개, 10년치(’07~’16) 합계 총 2,840개의 기술분야별 패널데이터와 연구개발활동조사 연 단위 35개, 10년치(’06~’15) 합계 총 350개의 기술분야별 패널데이터를 분석에 활용하였다. 실증분석결과, 정부 선정영향력을 결정하는 규제적, 규범적, 문화인지적 요인 등의 제도적 요인이 긍정적인 영향을 미치는 것으로 나타났다. 또한 정부선택이 탐색전략을 병행하면 공동탐색을 증가시킬 수 있고, 정부선택이 공동탐색을 거치면 민간연구개발활동을 증가시킬 수 있다는 유의미한 결과를 도출하였다. 따라서 과학기술기본계획과 정부R&D 투자방향에 포함된 기술분야를 규제를 통해 의무적으로 반영하고 전문가적 가치관이 반영된 전년도 정부연구비와 민간매칭연구비가 높을수록, 전년도 논문과 특허등록에 기여한 정도를 높일 필요가 있다. 또한 국가가 전략적으로 육성하는 기술분야에서 기존에 잘 하던 방식으로 연구개발을 집중적으로 수행하고 새로운 영역에 대한 창의·도전적 연구를 확대하는 탐색전략을 병행하는 것이 의미가 있다. 그리고 정부R&D를 통한 문제 해결과정에서 발생한 성과물이 민간에 이전되고 사업화되어 민간R&D활동을 증가시킬 수 있음을 실증적으로 고찰하였다. In order to research the impact of government on technological development in chasing advanced countries such as our country, this study analyzed the impact of government’s selection force on which factors were determined and linked to the private sector to lead technological development. There is a government’s selection force based on the institutional environment, which the process of developing and expanding the government’s selection force is reflected in the determination of investment strategies by technology fields. This study aims to show that the government’s selection force is conducted in a form that affects R&D activities in the private sector through collaborative search and learning processes according to appropriate search strategies. For this purpose, We were utilized for analysis 284 national R&D project research analysis data per year, 10 years (’07-’16) total of 2,840 technical field-specific panel data and a total of 350 panel data for each technical field including 35 units of R&D activity surveys per year (’06-’15). The results of an empirical analysis, Institutional factors such as regulative, normative, and cultural-cognitive factors that determine the influence on the government’s selection were found to have positive effects. And The collaborative search could be increased if the government’s selection combines a search strategy, and significant results were derived that the collaborative search could increase the private research and development activities. So, the government is obliged to reflect the technology fields that includes the S&T basic plan, government R&D investment direction through regulation. The higher the previous year’s government research funds and private matching research funds reflected in professional values, the higher the degree to which the previous year’s papers and patents were contributed. In addition, it is meaningful to focus on R&D in ways that the country has traditionally performed well in the technology fields that the country strategically fosters, and to expand creative and challenging research in new areas. And it is meaningful to consider it empirically that the outcomes of the problem-solving process through government R&D could be transferred to the private sector and commercialized, increasing private R&D activities.

PreVision : 플랜트의 이상 징후를 조기에 감지하기 위한 솔루션

김현식(HyunSik Kim),유준우(Junwoo Yoo),박진성(JinSung Park) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11

In this paper, based on a machine learning algorithm, we propose a fault detection method that can predict fault and detect it early. This method has the advantage of having high accuracy and versatility at the same time, and it consists of Ensemble Learning based on a prediction algorithm to predict fault at an early stage and Auto-Learning Algorithm for automatically optimizing the learning model. By applying the aforementioned algorithm to a solution called PreVision, it was confirmed that anomalies were detected early in various plants. PreVision can utilize its powerful simulation capabilities to validate results on its own.

주요 자재 운반에 따른 건설현장 비산먼지의 PM 배출계수 및 배출량 산정 방법에 관한 연구

김현식(Kim, Hyunsik),태성호(Tae, Sungho),양지환(Yang, Jihwan) 대한건축학회 2020 대한건축학회 학술발표대회 논문집 Vol.40 No.2

Recently, massive harm from fugitive dust caused by construction vehicles has occurred at construction sites in urban areas of Korea. In particular, fine dust contained in fugitive dust causes health problems to residents and workers near the site, so it must be predicted and managed in advance. Therefore, in this study, major materials that are expected to be transported in a large amount are derived, and the method of calculating emission factors and total emission of PM caused by transporting the materials are studied for the purpose of predicting the amount of PM generated by transporting major materials at construction sites. As a result, emission factors are derived according to the transport of major materials, and the method for calculating the emissions at the construction site is proposed.

녹색건축인증제 내 건축물 전과정 평가 방법에 따른 환경영향 평가 사례 연구

김현식 ( Hyunsik Kim ),태성호 ( Sung Ho Tae ),김낙현 ( Rak Hyun Kim ) 한국전과정평가학회 2018 한국전과정평가학회지 Vol.19 No.1

LCA (Life Cycle Assessment) analysis for buildings became a part of G-SEED (Green Standard for Energy and Environmental Design), which is a certificate program for green building in South Korea, to provide additional credits for the certificate. In this research, LCA analysis of a specific building which fulfills G-SEED program is performed to verify the environmental impact during the entire life cycle of the building. Moreover, the results of the analysis are used to identify the period of building life cycle which provides environmental impact the most. As a result, practical solution to reduce environmental impact in architecture field is suggested.

자녀동거가 유산상속 선호형태에 미치는 영향: 노인의 성별 효과에 관한 종단적 분석

김현식 ( Kim Hyunsik ),황선재 ( Hwang Sunjae ) 한국보건사회연구원 2013 保健社會硏究 Vol.33 No.4

본 연구는 자녀와의 동거형태가 노인의 유산상속 선호형태에 미치는 영향을 경험적으로 살펴보려는 연구관심에서 출발한다. 이를 위해 2008년과 2011년의 노인실태조사 및 사전후 연구설계(pre-test and post-test design)를 활용하여 종단분석을 실시하였다. 또한 자녀동거효과를 효과적으로 분석하기 위하여 복합적인 이론에 근거한 사회환원 자료, 아들선호 자료, 그리고 이타주의적 상속자료를 따로 추출한 후, 각 자료에 적합한 통계모형(다항, 서열, 이항 로짓모형)을 적용하여 결과를 도출하였다. 남녀 노인집단을 분리하여 분석한 주요결과를 살펴보면, 우선 남성노인에게 있어 딸과의 지속적인 동거는 사회에 환원하기보다는 자녀에게 유산을 상속할 의도를 높이는 것으로 나타났으며, 동시에 장자상속보다는 균분상속을 더 선호하게 하는 효과가 있었다. 그러나 여성노인의 경우 아들과의 지속적인 동거가 장자상속에 대한 의도를 유의미하게 높이는 것으로 나타났으며, 아들과 지속적으로 동거하는 경우 경제적으로 어려운 자녀에게 유산을 주겠다는 응답보다는 효도한 자녀에게 주겠다는 응답을 늘리는 것으로 나타났다. 종단분석, 그리고 이론적 모형에 근거를 둔 본 연구는 기존의 관련연구를 발전시키고 있을 뿐만 아니라 향후 유산상속 선호형태 연구를 위한 다양한 시사점을 제시한다. This study attempted to investigate the effects of co-residence with adult children on the bequest intentions of elderly Korean parents. Various theoretical perspectives are discussed and are empirically tested by utilizing the Survey of Living Conditions and Welfare Needs of Korean Older Persons (2008-2011). A pre-test and post-test design for analyzing longitudinal data was adopted in order to conduct a more rigorous study. After drawing three distinctive datasets by dimensions of bequest intention - charitable giving, son preference, and altruistic bequest - , multinominal, ordinal, and binary logit models were applied. The results revealed that co-residence of an elderly fathers with their daughters tended to enhance the probability of bequeathing wealth to children, rather than making charitable giving decisions. Elderly fathers who lived with their daughters were also more likely to prefer equal inheritance among children than those who did not. In contrast, elderly mothers living with sons were more likely to express son preference than those who were not. Lastly, the probability of elderly mothers preferring altruistic bequest was higher when they lived separately from their sons.