축소모형주택을 이용한 전통창호의 차음성능에 관한 실험적 연구

신훈,장길수,송민정,Shin, Hoon,Jang, Gil-Soo,Song, Min-Jeong 한국주거학회 2006 한국주거학회 논문집 Vol.17 No.5

This study aims to evaluate the sound insulation performance of Korean traditional paper(Hanji) windows as a material of environmental friendly building. Six types of traditional windows with 4 types of traditional window positions, were installed in l/2.5 scale model house. And then according to KS F 2235, comparative sound level differences between outdoor and indoor were measured. The main results are as follows; 1) TL(Transmission Loss) of Korean traditional paper windows, which cover one eighth of total balcony window, are ranged from 15 to 19 dB(A) in the living room and from 8 to 11 dB(A) in the balcony space. 2) TL of Korean traditional paper windows, which cover one fourth of total balcony window, are ranged from 10 to 19 dB(A) in the living room and from 8 to 10 dB(A) in the balcony space. 3) TL of Korean traditional windows with one side-one layer paper is ranged from 10 to 21 dB(A) and two side-one layer paper is 15 to 23 dB(A) and two side-two layer paper is 19 to 23 dB(A) respectively.

정보보호전문업체 지정에 즈음하여

신훈,Shin, Hoon 한국기술사회 2001 技術士 Vol.34 No.4

2001년 7월을 기하여 정보통신기반보호법이 발효되고 통신, 전력, 상수도 공항, 철도 정부주요 시설, 제1금융권 등 국가 주요 정보통신 기반시 설에 대해서 정보보호 감리가 의무화된다. 미국의 경우도 유럽의 강화된 정보보호지침에 대응하기 위해 2003년 발효 예정인 세이프 하버법에 대응하기 위한 각 기관, 단체, 기업들의 노력이 가시화되고 있다. 전세계의 정보보호 관련법이 각 자 자국의 이익을 중심으로 제정중인 시점에서 기술 분0티 전문가들이 좀 더 국가의 이익과 공공의 안녕에 부응하는 대응책을 마련하여 국익에 도움이 되는 방향으로 법제도가 운용될 수 있도록 관련법을 숙지해야 할 때이다. 그리고 전체 기술사들이 한마음으로 정치, 경제, 학술 등 각자 맡은 분야에서 분발 할 것을 촉구한다. As of July 1. 2001, the Law of Information 8t Telecommunication Protection has been compulsory to audit protection status on national information and Telecommunications Infra facilities such as communication, electricity, waterworks, airport, railway, primary facilities of government and the first financial circles. In U.S. institutions, organizations and corporations in each field are trying to prepare for Safe Har-bor agreed on Internet privacy regulation between U.S. and Europe to be effective in 2003. The Safe Harbor was motl-vated by strict European standard. Other countries make privacy and information protection law according to their own interest. Therefore Korean technical experts have to develop the law responding to national interest and public welfare. Besides scientific Held, experts in the field of politic, economy and academy also have to work hard to develop the law.

방제빙장치 전산해석방안 연구

신훈범(H.B. Shin),유진복(J.B. Ryu) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.5

This study presents the process of icing analysis to predict the icing shapes and performance of anti/de-icing systems. To predict the particle trajectory and collection efficiency on the 2D airfoil, The trajectory code is developed using the UDS(User Defined Scalar Transport Framework) of FLUENT. Energy balances are performed to predict the surface temperature distribution on the 2D airfoil. A various tests results which contain the ice shapes and temperature distribution are considered to validate the numerical method and results.

적합직교분해(Proper Orthogonal Decomposition) 기법을 활용한 공력해석 방안연구

신훈범(Hoon Beom Shin),이관중(Kawn Jung Lee),정훈화(Hoon Hwa Jung) 한국항공우주학회 2020 한국항공우주학회 학술발표회 논문집 Vol.2020 No.7

표면격자 변형 기법을 이용한 항공기 외형 최적설계 방안 연구

신훈범(H.B. Shin),정성기(S.G. Jung),최재승(J.S. Choi),김지홍(J.H. Kim) 한국전산유체공학회 2014 한국전산유체공학회 학술대회논문집 Vol.2014 No.11

전산해석을 이용한 방제빙장치 성능해석

신훈범(H.B. Shin),김지홍(J.H. Kim),정훈화(H.H. Jung) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.11

This study presents the analysis process for prediction of anti/de-icing systems. In previous studies, Icing analysis code based on Fluent(Commercial code) has been developed to simulate the droplet trajectory, ice shape and temperature distribution on the heated surface. In this study, It shows the results which contain the validation with several tests.

항공기 엔진베어 내 소화장치 성능예측을 위한 전산해석방법 연구

신훈범(H.B. Shin),서석주(S.S. Joo),정주현,유진복 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.5

There is fire dangers inside engine bay where fuel of oil leakge can be ignited by hot engine surfaces. So, Fire suppressor is needed to extinguish the flames. The current FAA requirement is that the concentration level should be greater than 6% by volume throughtout the protected zone for longer than a half second simultaneously. To Satisfy the FAA requirement, The Fire extinguish system should quickly delivery the fire extinguish agents and Fire extinguish system should be designed effectively. This study is to develop and simulate the injection of fire extinguish agents into the engine-bay. Transient simulations were performed and predicted the concentration of fire extinguish agents at the certain locatioin in the engine-bay.

초음속 유동장 내 이중 수직분사의 특성에 관한 연구 Ⅰ - 혼합특성

신훈범(Hun-Bum Shin),이상현(Sang-Hyeon Lee) 한국항공우주학회 2002 韓國航空宇宙學會誌 Vol.30 No.6

CFD를 이용한 헬리콥터의 배기재순환 예측

신훈범(H.B. Shin),유진복(J.B. Ryu) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5

The hot gas reingestion phenomenon of helicopter brings about the reduction of engine power available around in-ground. The phenomenon will vary for the conditions of ambient conditions and engine exhaust gas, the flow field associated with the downwash effect of main rotor. To verify the amount of hot gas reingestion to intake, Tests(Wind tunnel test, Flight test) or CFD could be available. At this study, the reingestion around in-ground would be predicted by numerical anaslysis(CFD).

단순흉부촬영과 Duel-Energy, Digital Tomosynthesis의 물리적 특성 비교평가에 관한 연구

신훈열(Hun-yeol Shin),김상현(Sang-hyun Kim),대창민(Chang-min Dae),민관홍(Kwam-hong Min) 대한영상의학기술학회 2015 대한영상의학기술학회 논문지 Vol.2015 No.1

목 적 : 본 연구는 간접방식 디지털 방사선시스템에서 chest phantom을 이용하여 환자 두께 변화에 따른 단순흉부촬영, Duel-Energy(이하 DE), Digital Tomosynthesis(이하 DTS) 영상을 물리적 평가를 하고자 한다. 대상 및 방법 : 연구에 사용되어진 General x-ray DE, DTS 검사는 본원 GE사의 Discovery XR656 장비를 사용하였다. Quality chest phantom(Duke07-646) 뒤에 Polymethylmethacrylate(PMMA) 0cm, 5cm, 10cm, 15cm를 놓고 동일조건으로 Lung section, Heart section을 나누어 조사하였다. DE 는 soft-tissue 영상을 대상으로 시행하였다. 이렇게 얻어진 영상으로 SNR, CNR, RMSE를 구하였으며, 각각의 수치를 비교 분석하였다. 결 과 : Phantom test에 의한 SNR은 두께가 증가함에 따라 대체적으로 비례하여 증가하였지만, 단순흉부촬영(lung section) 10cm일 때, SNR이 증가했다가 15cm일 때는 감소하는 결과가 나타났다. PMMA를 두지 않은 것과 PMMA 15cm와의 DTS는 최대 약 1.9배, DE 에서는 약 4.4배 정도 차이를 보였다. CNR은 Lung section에서 0~5cm구간은 감소하지만 10~15cm 구간은 상승하는 것으로 나타나며 Heart section에서는 DE에서만 10~15cm구간이 상승하는 것으로 관찰되었다. 또 한 PMMA를 두지 않은 것과 PMMA 15cm와의 Lung에서 DTS는 최대 약 5.3배, DE는 약 1.5배, Heart에서 DTS는 최대 약 18배, DE는 약 5배정도 차이가 크게 나타났다. RMSE값은 DTS에서의 Small ROI 값이 단순흉부촬영보다 Lung에서 23.7배, Heart에서 5.1배 더 높게 나타났다. 결 론 : 단순흉부촬영, DE와 DTS는 검사하고자 하는 목적이 다르다. 하지만 물리적인 화질 평가만 보자고 한다면 그 차이가 크다. 이번 연구에서는 SNR, CNR, RMSE와 같은 물리적 방법으로 분석한 결과 Lung, Heart section 포함하여 DTS에서 가장 우수한 화질평가를 받았 다. Purpose : Purpose of this study is to evaluating the Physical Characteristics of General chest radiography, Duel-Energy (hereinafter DE) and Digital Tomosynthesis (hereinafter DTS) according to patient weight changes by using a chest phantom in indirect digital radiography systems. Materials and Methods : General chest radiography, DE and DTS test were used GE s Discovery XR656 equipment in the study Quality chest phantom (Duke07-646) placed in front of Polymethylmethacrylate (PMMA) 0cm, 5cm, 10cm, and 15cm were exposed separately Lung and Heart section under the same conditions. DE was performed to target the soft-tissue imaging. Was thus obtained image to obtain SNR, CNR, RMSE, each of the levels were compared. Result : SNR was increasing in proportion according to increasing thickness generally by phantom test. General chest (lung section), when the SNR increases 10cm, but when 15cm, decreasing the results appeared. Not put PMMA and PMMA 15cm in DTS is up to approximately 1.9 times and DE in about 4.4 times differed. The CNR in Lung section 0 ~ 5cm intervals are reduced, but 10 ~ 15cm interval appears to be rising in the Heart section was observed to rise 10 ~ 15cm interval only DE. In addition, DTS of not put the PMMA and PMMA 15cm is up to about 5.3 times in the Lung, DE showed the difference of about 1.5 times. In Heart, up to about 18 times, DE is a difference of about 5 times increased. RMSE values of Small ROI in DTS were 23.7 times higher than those of General chest shooting in Lung and were 5.1 times higher in Heart. Conclusion : General chest radiography, DE and DTS are different from the purpose of examination. However the difference is greater, if only wanted to observe the physical quality performance. In this study, SNR, CNR, the analysis by physical methods such as RMSE, including Lung and Heart section received the highest quality rating in DTS.