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정상 폐활량을 보이는 성인 환자에서 $FEF_{25{\sim}75%}$를 통한 기관지확장제 반응의 예견
박세환,이승엽,강승모,선춘식,김현경,이병훈,이재형,김상훈,Park, Se-Hwan,Lee, Seung-Yup,Kang, Seung-Mo,Seon, Choon-Sik,Kim, Hyun-Kyung,Lee, Byoung-Hoon,Lee, Jae-Hyung,Kim, Sang-Hoon 대한결핵및호흡기학회 2011 Tuberculosis and Respiratory Diseases Vol.71 No.3
Background: When patients with chronic respiratory symptoms have a normal spirometry result, it is not always easy to consider bronchial asthma as the preferential diagnosis. Forced expiratory flow between 25% and 75% of vital capacity ($FEF_{25{\sim}75%}$) is known as a useful diagnostic value of small airway diseases. However, it is not commonly used, because of its high individual variability. We evaluated the pattern of bronchodilator responsiveness (BDR) and the correlation between $FEF_{25{\sim}75%}$ and BDR in patients with suspicious asthma and normal spirometry. Methods: Among patients with suspicious bronchial asthma, 440 adult patients with a normal spirometry result (forced expiratory volume in one second [$FEV_1$]/forced vital capacity [FVC] ${\geq}70%$ & $FEV_1%$ predicted ${\geq}80%$) were enrolled. We divided this group into a positive BDR group (n=43) and negative BDR group (n=397), based on the result of BDR. A comparison was carried out of spirometric parameters with % change of $FEV_1$ after bronchodilator (${\Delta}FEV_1%$). Results: Among the 440 patients with normal spirometry, $FEF_{25{\sim}75%}%$ predicted were negatively correlated with ${\Delta}FEV_1%$ (r=-0.22, p<0.01), and BDR was positive in 43 patients (9.78%). The means of $FEF_{25{\sim}75%}%$ predicted were $64.0{\pm}14.5%$ in the BDR (+) group and $72.9{\pm}20.8%$ in the BDR (-) group (p<0.01). The negative correlation between $FEF_{25{\sim}75%}%$ predicted and ${\Delta}FEV_1%$ was stronger in the BDR (+) group (r=-0.38, p=0.01) than in the BDR (-) group (r=-0.17, p<0.01). In the ROC curve analysis, $FEF_{25{\sim}75%}$ at 75% of predicted value had 88.3% sensitivity and 40.3% specificity for detecting a positive BDR. Conclusion: BDR (+) was not rare in patients with suspicious asthma and normal spirometry. In these patients, $FEF_{25{\sim}75%}%$ predicted was well correlated with BDR.
Status of Development of Pyroprocessing Safeguards at KAERI
박세환,안성규,장홍래,한보영,김봉영,김동선,김호동,이채훈,오종명,서희,신희성,원병희,구정회,Park, Se-Hwan,Ahn, Seong-Kyu,Chang, Hong Lae,Han, Bo Young,Kim, Bong Young,Kim, Dongseon,Kim, Ho-Dong,Lee, Chaehun,Oh, Jong-Myeong,Seo, Hee,Shin, Hee Korean Radioactive Waste Society 2017 방사성폐기물학회지 Vol.15 No.3
The Korea Atomic Energy Research Institute (KAERI) has developed a safeguards technology for pyroprocessing based on the Safeguards-By-Design (SBD) concept. KAERI took part in a Member-State Support Program (MSSP) to establish a pyroprocessing safeguards approach. A Reference Engineering-scale Pyroprocessing Facility (REPF) concept was designed on which KAERI developed its safeguards system. Recently the REPF is being upgraded to the REPF+, a scaled-up facility. For assessment of the nuclear-material accountancy (NMA) system, KAERI has developed a simulation program named Pyroprocessing Material Flow and MUF Uncertainty Simulation (PYMUS). The PYMUS is currently being upgraded to include a Near-Real-Time Accountancy (NRTA) statistical analysis function. The Advanced Spent Fuel Conditioning Process Safeguards Neutron Counter (ASNC) has been updated as Non-Destructive Assay (NDA) equipment for input-material accountancy, and a Hybrid Induced-fission-based Pu-Accounting Instrument (HIPAI) has been developed for the NMA of uranium/transuranic (U/TRU) ingots. Currently, performance testing of Compton-suppressed Gamma-ray measurement, Laser-Induced Breakdown Spectroscopy (LIBS), and homogenization sampling are underway. These efforts will provide an essential basis for the realization of an advanced nuclear-fuel cycle in the ROK.
박세환(Se-Hwan Park),김종윤(Jong-Yun Kim),이영현(Young-Hyun Lee) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.11
Due to the IoT and wearable devices including P2P/M2M/P2M devices popularization, explosive increment of data traffic is born development needs of 5G mobile communication system in high-speed/high-volume/high-quality. In this study, will explain on the 5G service prospect and technology development issues, industry development strategy, contemporary review in 5G system for the next generation wireless communication.
디지털 애니메이션에서 나타나는 색 체계와 색온도 적용사례 연구
박세환 ( Se Hwan Park ) 한국영상미디어협회 2007 예술과 미디어 Vol.6 No.1
전통 방식의 애니메이션에서 시각적 요 소로 강조되었던 색상은 현대의 디지털 애니메이션에서도 역시 중요한 요소로 작용 한다. 과거 셀로이드와 애니메이션 크레인 카메라의 촬영을 전제로 했던 셀 애니메이션 경우 고유의 코드 번호를 가진 셀 물감을 셀 로이드에 칠하는 방식으로 색을 표 현 했다. 이러한 아날로그의 방식으로 표현 되어 오던 애니메이션 색체계는 90년대 들어 애니메이션 제작이 디지털 시스템으로 전환 되면서 디지털 색체계로 옮겨지기 시작 했다. 하지만, 디지털 색 체계는 기존의 셀 물 감의 색상코드만큼 일정한 패턴을 가지고 못했고 필름이라는 부드러운 소재에 표현 되는 색의 조화도 디지털 애니메이션에서 는 표현하기 힘들었기 때문에 여러 가지 문제점이 나타나고 있다. 이에 본 연구는 이러한 디지털 애니메이션의 색체계의 특성을 알아보고 색지정에 색온도를 적용시킨 애니메이션을 분석하여 디지털 애니메이션의 색지정의 새로운 방 안을 찾고자 한다. Color emphasized on visual constituent in animation of tradition way interacts by important urea too in modern Digital Animation. Expressed lust by way to paint c ell dyestuff that have cell animation case unique code number that presupposed pho tographing of animation crane camera with cell Lloyd past in cell Lloyd. As animation color system expressed by way of these analog takes the 90 and animation manufacture is converted to digital system, began to be moved to digital color system. However, digital color system has fixed pattern as color code of existent cell dyes tuff and did not and various kinds problem is appearing because was hard to express expressed color harmony in Digital Animation in soft site that is film. This research wishes to search special quality of color system of these Digital Animation and analyze animation to apply color temperature in color appointment and look for new way of color appointment of Digital Animation hereupon.