국내 건축물 에너지 절감관련 정책 개선방안

박재현,홍태훈,Park, Jae-Hyun,Hong, Tae-Hoon 한국건설관리학회 2010 한국건설관리학회 논문집 Vol.11 No.4

기후변화협약에 따라 선진국을 중심으로 한 세계 30여 개국이 현재 온실가스 의무감축 대상국으로 지정되어있다. 우리나라도 2013 년부터 시작되는 2차 의무감축에 의해 의무감축 대상국에 지정될 가능성이 높다. 이에 최근 정부는 온실가스 저감을 위한 노력이 이루어지고 있으며 온실가스 저감 대책으로 건축물 에너지를 감소하는 것과 관련된 정책을 시행하고 있다. 그러나 국내의 관련 정책은 에너지 절감과 관련된 측면에 있어 해외 사례에 비하여 건축물 개선안 제공 및 건물 개보수시 전문가 검증과 같은 절차가 없다. 이에 따라 이러한 문제점을 보완하는 국내 정책의 개선방안이 정부 단위, 시도 단위의 정책을 기준으로 제시되었다. 하지만 본 연구에서 제시한 개선방안은 개략적인 개선방향으로 세부적인 내용은 향후 추가적인 연구가 필요할 것으로 판단된다. Today, more than thiry countries around the world are designated as a mandatory GHG(GreenHouse Gas) emissions country from the UNFCCC(United Nations Framework Convention on Climate Change). Korea is also possible to designate a mandatory GHG emissions country after Second mandatory emissions which will be started in 2013. Accordingly, Korea government has made efforts to reduce GHG and has enforced energy-related policies to deduce building energy. But there is no process such as providing of existing building improvement recommendations or expert verification for building remodeling in Korea energy-related policies compared with policies in other countries. For this reason, improvements of Korea which divided governments and city provinces are suggested. However suggested improvements are directions, so additional research is needed for detail methods.

작업자의 작업공구에 따른 근골격계 질환과 작업효율 모델

박재현,김경훈,김재준,Park, Jae-Hyun,Kim, Kyong-Hoon,Kim, Jae-Jun 대한건축학회 2011 대한건축학회논문집 Vol.27 No.2

Due to a massive outbreak in the workplace and a rapid increase of industrial disaster victims, musculoskeletal disorders is recently emerging as a major issue in the field of industry safety and health. Musculoskeletal disorders has already held a high rank of occupational diseases in advanced countries and it is rapidly growing every year in Korea. In particular, it is expected that people working in the construction industry have higher rates of musculoskeletal disorders given that the construction industry requires a higher level of dependence on human labor and laborers' high intensity of physical labor outside. In this regard, targeting laborers involving in building construction, this study attempts to analyze the impact of musculoskeletal disorders which can be shown according to working hand tools, making to model musculoskeletal disorders on efficiency. As a result of analyses, it appears that there are differences in body parts that hurt skeleton and musculature between structural steel laborers and carpenters owing to different working hand tools they use. In case of structural steel laborers, they tend to feel most psychological distress when their necks and shoulders are under stress. In contrast, carpenter is likely to be agitated when their legs and knees are exposed to stress. Accordingly, this study is worthwhile by finding out different levels of musculoskeletal stress and different body parts depending on the tools laborers use, in turn proving that this has an impact on efficiency through modeling and quantifying it.

기후정보를 반영한 확률적 일정계획수립 모델 개발

박재현,김경훈,김재준,Park, Jae-Hyun,Kim, Kyong-Hoon,Kim, Jae-Jun 대한건축학회 2011 대한건축학회논문집 Vol.27 No.2

This study aims to overcome problems of scheduling established by planner's institution and judgment. By introducing stochastic approach, this study proposes a method to predict work duration on the construction sites reflecting work information generated around unit work of previous cases and non-working day, and this model was verified by its application to a case study. As a result of analyses on previous researches in an attempt to develop work duration model, there were several studies on estimating work duration based on stochastic approach. However, previous researches could not predict work duration in different construction sites because unit work was not separated. Accordingly, this study attempts to suggest a practical method to predict work duration in advance in pre-construction phase where construction is not under way. After predicting construction time of a site where duration is supposed to be predicted based on the data of measuring case study, verification of this model was carried out in compared to real construction time. In consequence, work duration within twelve days was been estimated with a margin of error of 5%. In addition, the period for actual construction turned out ten days, which was analyzed within twelve day. Therefore, model of this study show the practical method estimating work duration in pre-construction phase.

FMCW 레이더 – 카메라 간 Sensor Fusion을 위한 효율적 공간 보정

박재현(Jae-Hyun Park),박정훈(Jeong-Hoon Park),김성철(Seong-Cheol Kim) 한국통신학회 2023 한국통신학회 학술대회논문집 Vol.2023 No.6

멱함수 가공경화 모델을 이용한 복합실린더의 자긴가공해석

박재현(Jae-Hyun Park),이영신(Young-Shin Lee),심우성(Woo-Sung Shim),김재훈(Jae-Hoon Kim),차기업(Ki-Up Cha),홍석균(Suk-Kyun Hong) 대한기계학회 2008 大韓機械學會論文集A Vol.32 No.6

In order to achieve long fatigue lifetimes for cyclically pressurized thick cylinders, multi-layered compound cylinder has been proposed. Such compound cylinder involves a shrink-fit procedure incorporating a monobloc tube which has previously undergone autofrettage. The basic autofrettage theory assumes elastic-perfectly plastic behaviour. Because of the Bauschinger effect and strain-hardening, most materials do not display elastic-perfectly plastic properties and consequently various autofrettage models are based on different simplified material strain-hardening models, which is assumed that combination of linear strain-hardenig and power strain-hardening model. This approach gives a more accurate prediction than the elastic-perfectly plastic model and is suitable for different strain-hardening materials. In this paper, a general autofrettage model that incorporates the material strain-hardening relationship and the Bauschinger effect, based upon the actual tensile-compressive stress-strain curve of a material was proposed. The model was obtained using the von Mises yield criterion and plane strain condition. The tensile-compressive stress-strain curve was obtained by experiment. The parameters needed in the model were determined by fitting the actual tensile-compressive curve of the material. Finally, strain- hardening model was compared with elastic-perfectly plastic model.

기후정보를 반영한 확률적 일정계획수립 모델 개발

박재현(Park Jae-Hyun),김경훈(Kim Kyong-Hoon),김재준(Kim Jae-Jun) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.2

This study aims to overcome problems of scheduling established by planner’s institution and judgment. By introducing stochastic approach, this study proposes a method to predict work duration on the construction sites reflecting work information generated around unit work of previous cases and non-working day, and this model was verified by its application to a case study. As a result of analyses on previous researches in an attempt to develop work duration model, there were several studies on estimating work duration based on stochastic approach. However, previous researches could not predict work duration in different construction sites because unit work was not separated. Accordingly, this study attempts to suggest a practical method to predict work duration in advance in pre-construction phase where construction is not under way. After predicting construction time of a site where duration is supposed to be predicted based on the data of measuring case study, verification of this model was carried out in compared to real construction time. In consequence, work duration within twelve days was been estimated with a margin of error of 5%. In addition, the period for actual construction turned out ten days, which was analyzed within twelve day. Therefore, model of this study show the practical method estimating work duration in pre-construction phase.

Chios Gum Mastic Induces Cell Cycle Arrest and Apoptosis in YD9 Human Oral Squamous Carcinoma Cells

Jae-Hyoun Park(박재현),Gyoo-Cheon Kim(김규천),Hyun-Ho Kwak(곽현호),In-Ryoung Kim(김인령),Seung-Eun Lee(이승은),Jin Chung(정진),Hae-Ryoun Park(박혜련),Sang-Hun Shin(신상훈),Soo-Hyun Choi(조수현),Chul-Hoon Kim(김철훈),Chang-Ok Nam( 대한체질인류학회 2008 대한체질인류학회지 Vol.21 No.1

식물인 Pistiacia lentiscus L. var. Chia.는 그리이스 키오스 섬의 남부지방에서만 서식하며, Chios gum mastic (CGM)으로 알려져 있는 수지를 만들어 낸다. Pistacia lentiscus 나무의 줄기와 잎에서 추출한 천연물질인 CGM은 과거 수세기 동안 지중해와 중동 지역 국가들에서 음식 첨가물과 치료약으로 광범히 하게 사용되어 왔었다. 본 연구는 사람구강편평상피암종세포(YD9 cells)에서 CGM의 세포독성과 성장억제 효과, 그리고 세포주기의 변형과 세포자멸사(apoptosis)에 대한 분자생물학적 기전을 알기 위해서 수행하였다. YD9 세포와 사람정상각화세포(HaCaT)의 생존률 측정은 MTT법을 시행하였고, YD9 세포의 성장억제를 확인하기 위해서는 clonogenic assay를 사용하였다. 세포자멸사가 유도되는 YD9 세포를 관찰하기 위해서 hoechst 염색법과 DNA 전기영동법을 사용하였다. 그리고 YD9 세포에 CGM을 적용한 후, Western blot 분석, 세포면역화학염색, 공점레이저주사현미경 검경, FACScan flow cytometry, 사립체막 전위변화, proteasome 활성도 측정 등을 시행하였다. CGM으로 처리된 YD9 세포는 용량 의존적인 세포 성장억제와 세포자멸사에 의한 세포죽음을 보였고, caspase-9, caspase-3, PARP 그리고 DFF45 (ICAD)의 파괴와 분절의 생성, DNA의 조각남, 핵 응축, 사립체막전위의 감소, Bax와 Bcl-2의 분율의 변화, cytochrome c의 사립체에서의 세포질로의 유리, AIF와 DFF40 (CAD)의 핵으로의 이동과 같은 세포자멸사 증거를 보였다. Flow cytometry 분석에서는 cyclin D1, cyclin D3, Cdk2 그리고 Cdk4의 발현의 감소와 p21<SUP>WAF1/CIP1</SUP>와 p53의 발현 증가와 관계있는 것으로 보여지는 G1 세포주기 정지를 보였다. 이러한 결과는 CGM이 세포주기 관련 단백질들의 변형을 유도한 G1 세포주기정지와 사립체와 caspase 경로를 통한 세포자멸사를 유도함을 명확하게 증명하고 있다. 이와 같은 강력한 세포주기 정지와 세포자멸사 유도능은 CGM이 사람구강편평세포암종의 새로운 치료전략으로서의 가능성을 높여 준다고 생각한다. Chios gum mastic (CGM) is obtained from the stem and leaves of Pistacia lentiscus trees and has been extensively used for centuries in Mediterranean and Middle Eastern countries, both as a dietary supplement and herbal remedy. This study was undertaken to examine in vitro effects of cytotoxicity and growth inhibition, and the molecular mechanism underlying modulation of cell cycle and induction of apoptosis in YD9 human oral squamous carcinoma cell line treated with CGM. The viability of YD9 cells and human normal keratinocyes (HaCaT cells), and the growth inhibition of YD9 cells were assessed by the MTT assay and clonogenic assay respectively. The hoechst staining and DNA electrophoresis were conducted to observe the YD9 cells undergoing apoptosis. YD9 cells were treated with CGM, and Western blotting, immunocytochemistry, confocal microscopy and FACScan flow cytometry were conducted. Mitochondrial membrane potential change and proteasome activity were measured. CGM treatment on YD9 cells resulted in a does-dependent inhibition of cell growth and induced apoptotic cell death. And tested YD9 cells showed several lines of apoptotic manifestation. Flow cytometric analysis revealed that CGM resulted in G1 arrest in cell cycle progression which was associated with decrease in the protein expression of cyclin D1, cyclin D3, Cdk2 and Cdk4, and increase in the protein expression of p21<SUP>WAF1/CIP1</SUP> and p53. These results demonstrate that CGM induces G1 the cell cycle arrest via the modulation of cell cycle-related proteins, and apoptosis via mitochondria and caspase pathway in YD9 cells, suggesting that CGM can be considered as a novel therapeutic strategy for human oral squamous cell carcinoma from its strong cell cycle arrest and apoptosis-inducing activity.

급성 담낭염으로 발현한 과호산구증가증후군 2예

박재현 ( Jae Hyun Park ),김병훈 ( Byoung Hoon Kim ),김미강 ( Mi Kang Kim ),이재은 ( Jae Eun Lee ),김광택 ( Kwang Taek Kim ),유준재 ( Jun Jae Yoo ),김희준 ( Hee Jun Kim ),정성원 ( Sung Won Jung ),김철홍 ( Cheol Hong Kim ),현인규 ( 대한소아알레르기호흡기학회(구 대한소아알레르기 및 호흡기학회) 1992 소아알레르기 및 호흡기학회지 Vol.2 No.3

Eosinophilic cholecystitis (EC) is a rare form of acute cholecystitis, of which diagnosis is based on classical symptoms of cholecystitis with a presence of >90% eosinophilic infiltration within the gall bladder. EC rarely manifests in idiopathic hypereosinophilic syndrome (IHES). Here, we report two cases of EC with IHES. One is a 57-year-old male who presented with acute right upper quadrant (RUQ) pain, jaundice and fever. The initial peripheral blood eosinophil count was 2,070/mm3, and further elevated to 12,590/mm3. Acute acalculous cholecystitis with cholangitis was confirmed by computed tomography (CT). He improved with endocopic nasobiliary drainage and antibiotic therapy. The other is a 64-year-old female who presented with acute RUQ pain. She also complained of dyspnea and tingling sensation of both hands and feet. The initial peripheral blood eosinophil count was 10,400/mm3. Abdominal CT revealed findings suggestive of acute acalculous cholecystitis. She improved with systemic glucocorticosteroid therapy. No other causes of hypereosinophilia were found in either patients. Thus, cholecystectomy may not be mandatory for the treatment of EC with IHES. (Allergy Asthma Respir Dis 2014;2:222-226)

작업자의 작업공구에 따른 근골격계 질환과 작업효율 모델

박재현(Park Jae-Hyun),김경훈(Kim Kyong-Hoon),김재준(Kim Jae-Jun) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.2

Due to a massive outbreak in the workplace and a rapid increase of industrial disaster victims, musculoskeletal disorders is recently emerging as a major issue in the field of industry safety and health. Musculoskeletal disorders has already held a high rank of occupational diseases in advanced countries and it is rapidly growing every year in Korea. In particular, it is expected that people working in the construction industry have higher rates of musculoskeletal disorders given that the construction industry requires a higher level of dependence on human labor and laborers’ high intensity of physical labor outside. In this regard, targeting laborers involving in building construction, this study attempts to analyze the impact of musculoskeletal disorders which can be shown according to working hand tools, making to model musculoskeletal disorders on efficiency. As a result of analyses, it appears that there are differences in body parts that hurt skeleton and musculature between structural steel laborers and carpenters owing to different working hand tools they use. In case of structural steel laborers, they tend to feel most psychological distress when their necks and shoulders are under stress. In contrast, carpenter is likely to be agitated when their legs and knees are exposed to stress. Accordingly, this study is worthwhile by finding out different levels of musculoskeletal stress and different body parts depending on the tools laborers use, in turn proving that this has an impact on efficiency through modeling and quantifying it.

자긴가공된 이중실린더의 기계가공효과

박재현(Jae-Hyun Park),이영신(Young-Shin Lee),김재훈(Jae-Hoon Kim),공정표(Jeong-Pyo Kong),차기업(Ki-Up Cha) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5

Autofrettage process is used for internal forming and sizing of cylinder designed to withstand high internal pressures. Once the tube is autofrettaged, it needs to be machined to its final dimensions both at the bore and its outer surface. This paper presents an analytical analysis and numerical analysis of machined compound cylinder using finite element code, ANSYS10.0. An analytical model for predicting the level of autofrettage following either inner, outer, or combined machining of the compound cylinder is developed for the autofrettage residual stress field is simulated by an autofrettaged pressure. The autofrettaged pressures are obtained by using trying-error method. As autofrettage percentage is 20 %, the numerical results are found to be in almost agreement with the analytical ones. However, as autofrettage percentage is 60 %, the numerical results have a little difference with the analytical ones.