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직각 흡음체 설치 경량방음터널의 토출소음 저감효과 분석
정영도 ( Young Do Jeong ),안동욱 ( Dong Wook Ahn ),노명현 ( Myung Hyun Noh ) 한국복합신소재구조학회 2016 복합신소재구조학회논문집 Vol.7 No.1
Most of the soundproof tunnels generate significant discharge noise through their inlets and outlets so that the length of the tunnel has been extended frequently than required to minimize the effect on such discharge noise. Thus, in this paper, we investigate reduction capability of discharge noise from the sound proof tunnel installed with lateral sound-absorbing panels on the partitioned truss members in the longitudinal direction of the tunnel. In conclusion, noise field analysis results shows that the sound proof tunnels with lateral sound-absorbing panels have an effect on discharge noise abatement and thereby tunnel``s length reduction.
Pegylated 인터페론 알파 2a 병변내 주사로 치료한 고전형 카포시 육종 3예
정영인 ( Young In Jeong ),허준원 ( Joon Won Huh ),김건 ( Geon Kim ),김은정 ( Eun Jung Kim ),박향준 ( Hyang Joon Park ),주민숙 ( Mihn Sook Jue ) 대한피부과학회 2014 대한피부과학회지 Vol.52 No.9
Kaposi sarcoma (KS) is a multifocal proliferative vascular tumor often caused by human herpes virus 8. Among the four subtypes of KS, classic KS (CKS) is usually chronic, persisting over many years, but is not life threatening. Because the natural history of KS varies, many kinds of therapeutic option for CKS are available and their assessment may be difficult. We experienced three cases of CKS showing HHV-8 positive in biopsy, no history of immunosuppression and HIV infection, normal chest X-ray, no metastasis, and successfully treated with intralesional injection of Pegylated Interferon-α2a (Peg-IFN-α2a). After an intralesional Peg-IFN-α2a injection of 180 mcg/0.5 ml was administered once a week for 4 months, the size and induration of the lesions reduced greatly and the colors faded away. Histopathological examination of the resolved lesions did not show any evidence of KS with negative HHV-8 results. To the best of our knowledge, this is the first report in the literature for the treatment of CKS with intralesional Peg-IFN-α2a injection. (Korean J Dermatol 2014;52(9):646∼650)
폴리머 콘크리트 박막 교면포장 적용을 위한 실제 교량 정적 해석
정영도(Jeong Young Do),김준형(Kim Jun Hyung),이석홍(Lee Suck Hong),정진훈(Jeong Jin Hoon) 대한토목학회 2011 대한토목학회논문집 D Vol.31 No.3D
본 논문에서는 폴리머 콘크리트 박막 교면포장의 적용성을 알아보기 위한 하나의 방법으로 SMA(Stone Mastic Asphalt) 교면포장으로 시공된 실제 교량 및 이와 동일한 조건에서 교면포장을 박막의 폴리머 콘크리트로 대체한 가상의 교량에 대해 정적 해석을 실시하였다. 다양한 교량형식에 대한 평가를 위하여 SMA 교면포장으로 시공된 PSC(Prestressed Concrete) 거더교, 강박스 거더교, PSC 박스 거더교, RC(Reinforced Concrete) 라멘교를 해석하고 비교하였다. 바닥판과 교면포장은 완전히 접착된 것으로 가정하였으며 시공 중 발생한 응력과 처짐은 무시하고 교면포장의 자중과 차량하중으로 인하여 발생된 응력과 처짐을 분석하였다. 해석 결과 가벼운 단위중량과 앓은 두께로 포장지중이 더 작았던 폴리머 콘크리트를 사용한 교량의 응력과 처짐은 SMA를 시용한 교량보다 작은 것으로 해석되었다. 차량하중으로 인해 폴리머 콘크리트를 사용한 교량에 발생한 응력과 처짐은 앓은 포장 두께로 인한 단면이차모멘트의 감소 때문에 SMA를 사용한 교량보다 크게 나타났다. 포장의 지중과 차량하중이 동시에 작용하는 경우에는 지중 감소효과가 지배적으로 작용하여 폴리머 콘크리트를 사용한 교량의 응력과 처짐이 더 작게 나타났다. 향후 교면포장의 공용성 조사와 경제성 분석을 통한 비교 연구가 필요한 것으로 판단된다. In this paper, actual bridges constructed with SMA (Stone Mastic Asphalt) deck pavement and virtual bridges substituted the deck pavement with polymer concrete under the same conditions were statically analyzed to investigate applicability of the thin polymer concrete bridge deck pavements. PSC (prestressed Concrete) girder bridge, steel box girder bridge, PSC box girder bridge, and RC (Reinforced Concrete) rahmen bridge constructed with the SMA deck pavement were analyzed and compared to evaluate various types of the bridge. The bridge deck and pavement were assumed to be fully bonded and the stress and deformation during the construction were ignored while those due to pavement weight and vehicle loading were analyzed. According to the analysis results, the stress and deformation of the bridges using the polymer concrete due to the pavement weight were smaller than those using the SMA because of smaller self weight due to lighter unit weight and thinner thickness of the pavement. The stress and deformation of the bridges using the polymer concrete due to the vehicle loading were larger than those using the SMA because of the smaller area moment of inertia due to the thinner pavement thickness. In case that the pavement weight and vehicle loading applied simultaneously, the stress and deformation of the bridges using the polymer concrete were smaller because effect of self weight reduction was more dominant. Investigation of performance of the bridge deck pavement and analysis of economical efficiency are warranted.
파형강판 합성 U형 철도교의 소음성능에 대한 해석적 연구
정영도(Young Do Jeong),김동완(Dong Woan Kim),정진일(Jin il Jeong),임남형(Nam Hyoung Lim),고효인(Hyo In Koh) 한국철도학회 2015 한국철도학회 학술발표대회논문집 Vol.2015 No.10
도심구간을 통과하는 철도교량의 경우 소음저감 성능이 우수한 교량형식이 요구된다. 개발 중인 교량은 웹을 파형강판으로 적용한 강합성 U형 하로교 형식의 교량이며 철도차량을 감싸는 형식의 단면으로 교량단면 자체가 방음벽 역할을 수행하고 웹에 흡음시스템을 부착하여 소음저감 효과를 극대화하였다. 본 연구에서는 개발 중인 파형강판 합성 U형 철도교의 소음성능을 확인하기 위해 범용 소음해석 프로그램을 이용하여 해석적 분석을 수행하였다. Railway bridges through the downtown region is an excellent bridge type noise reduction performance is required. According to this request, the bridge of the noise barrier installation is not required and low vibration is under development. This railway bridge is corrugated steel plates composite U-type. Because the bridge cross-section wraps a train and web contains the sound-absorbing system, noise is reduced. In this study, we analyzed the noise reduction performance of the corrugated steel plates composite U-type railway bridge using general noise analysis program.
정영도 ( Jeong Young Do ),엄기하 ( Eom Gi Ha ),장강석 ( Jang Kang Seok ),고효인 ( Koh Hyo In ),최기효 ( Choi Ki Hyo ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
In the case of railway bridges passing through the urban area, bridge type with excellent noise reduction performance is required. The bridges under development are steel composite through bridges, which is a composite structure of upper flanges with concrete, and the section bridges themselves, which surround the train, have the feature of acting as a sound barrier. In this paper, the performance test of air conduction noise is performed by the 20m full scale model test of new type steel composite through bridge.