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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.
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.
박세환(Se-Hwan Park),유성철(Sung-Chul You),서봉상(Bong-Sang Seo) 대한전자공학회 2016 대한전자공학회 학술대회 Vol.2016 No.11
In this study, the issue on the high-tech industrial information and the vulnerable security issues of IoT are described. IoT systems communicate information via RFID/USN-based arbitrary changes in the connected to implement at tipping point early on. IoT technology ICT infrastructure and are climate change and disaster/disaster response, including many vulnerable security, energy savings, you will be able to solve global issues. This early on, security issues introduced in the solution, a comprehensive solution, including the institutional laws/precautions needed. Recent examples of frequent security threats while IoT is the biggest issue of introducing state-of-the-art industry information due to the vulnerable security hacking. This high-tech industries in order to bridge the information responsible for the target attribute, target range, and the protection of security and how to protect the subject, IoT environment considering the approach is needed. IoTs with health care and a wide variety of services, such as wearable devices emerge.
2-bit/cell Folded Split Gate Flash Memory의 제작 방법
박세환(Se Hwan Park),박일한(Il Han Park),조성재(SeongJae Cho),윤장근(Jang-Gn Yun),이정훈(Jung Hoon Lee),이동화(Dong Hua Li),김두현(Doo-Hyun Kim),이길성(Gil Sung Lee),김윤(Yoon Kim),이종덕(Jong Duk Lee),박병국(Byung-Gook Park) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11
A new 2-bit/cell SONOS flash memory device is designed. The device has recessed channel and a supplementary gate named as a select gate. The designed structure looks like a folded form of conventional one, so we call the device Folded Split Gate (FSG) flash memory