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생후 3개월부터 성장장애를 보이기 시작한 간뇌 증후군(Diencephalic Syndrome) 1례
김승수,김성신,박재옥,김창휘,Kim, Seung-Soo,Kim, Sung-Shin,Park, Jae-Ock,Kim, Chang-Whi 대한소아소화기영양학회 2003 Pediatric gastroenterology, hepatology & nutrition Vol.6 No.2
저자들은 생후 3개월부터 심한 성장장애를 보였던 남아가 14개월에 두 개 내 종양에 의해 발생한 간뇌증후군으로 진단되었기에 보고하는 바이다. 소아에서 적당한 양을 섭취하고 식욕이 유지됨에도 불구하고 현저한 성장장애와 체중 증가 부진을 보이는 경우에는 간뇌증후군의 감별이 필요할 것으로 사료된다. A 14-month-old child visited emergency room with stuporous mental state. He had been suffering from failure to thrive (FTT) and emaciation since three months of age, but he had good appetite and had been euphoric. A large mass was found in the third ventricle by brain CT and MRI. His parents refused operative removal of the mass and he expired 14 days after admission. It is necessary to include diencephalic syndrome in the differential diagnosis of failure to thrive when infants show FTT despite of good appetite and euphoric status.
$5\times5$ CNN 하드웨어 및 전.후 처리기 구현
김승수,전흥우,Kim Seung-Soo,Jeon Heung-Woo 한국정보통신학회 2006 한국정보통신학회논문지 Vol.10 No.5
The cellular neural networks have shown a vast computing power for the image processing in spite of the simplicity of its structure. However, it is impossible to implement the CNN hardware which would require the same enormous amount of cells as that of the pixels involved in the practical large image. In this parer, the $5\times5$ CNN hardware and the pre post processor which can be used for processing the real large image with a time-multiplexing scheme are implemented. The implemented $5\times5$ CNN hardware and pre post processor is applied to the edge detection of $256\times256$ lena image to evaluate the performance. The total number of block. By the time-multiplexing process is about 4,000 blocks and to control pulses are needed to perform the pipelined operation or the each block. By the experimental resorts, the implemented $5\times5$ CNN hardware and pre post processor can be used to the real large image processing. 셀룰러 신경회로망(Cellular Neural Networks: CNN)은 그 구조가 간단함에도 불구하고 강력한 연산능력을 가지고 있어 영상처리에 이용되어 왔다. 그러나 실제의 대규모 영상에 포함된 화소의 양과 같은 막대한 셀들을 필요로 하는 CNN하드웨어를 구현하는 것은 불가능하다. 본 논문에서는 시 다중화 처리 기법으로 대규모 실영상을 처리할 수 있는 $5\times5$ CNN 하드웨어와 전 후 처리기를 구현하였다. 구현된 $5\times5$ CNN 하드웨어와 전 후 처리기의 성능을 평가하기 위해 $ 레나영상에 대해 윤곽선 검출을 수행하였으며, 약 4,000번의 시다중화 블록처리와 각 블록 마다 10번의 제어 펄스에 의한 파이프라인 동작에 의해 영상처리가 수행되었다. 따라서 본 논문에서 구현된 $5\times5$ CNN 하드웨어와 전 후 처리기를 실영상 처리에 이용할 수 있다.
Measurement of the Gap and Grain Boundary Inventories of Cs, Sr in and I in Domestic Used PWR Fuels
김승수,강광철,최종원,서항석,권수한,조원진,Kim, S.S.,Kang, K.C.,Choi, J.W.,Seo, H.S.,Kwon, S.H.,Cho, W.J. Korean Radioactive Waste Society 2007 방사성폐기물학회지 Vol.5 No.1
Inventories of soluble elements in the gap and grain boundaries of domestic used PWR fuel pellets were measured to estimate the quantities of radionuclides that are liable to be rapidly released into the groundwater of a disposal site. The gap inventory of cesium for the pellets in the used fuel with a burn-up range of 45 to 66 GWD/MTU showed 0.85 to 1.7% of its total inventory, which was close to 1/6 to 1/3 of the fission gas release fraction (FGRF). However, the amounts of cesium released from the gaps of the pellets below 40 GWD/MTU of a burn-up and less than 1% FGRF were so erratic that the gap inventory could not be defined by ie FGRF. Strontium inventories in the gap and grain boundaries of the pellets in the same rod were not significantly varied, and the iodine inventory in the gap of the used PWR fuels was estimated to be less than or the same as the FGRF.
DBD 반응기에서 솔-젤 법으로 제조된 Pt/TiO<sub>2</sub> 촉매를 이용한 메탄의 플라즈마 전환반응
김승수,Kim, Seung-Soo 한국화학공학회 2007 Korean Chemical Engineering Research(HWAHAK KONGHA Vol. No.
Plasma catalytic methane conversion was carried out in the presence of sol-gel derived $Pt/TiO_2$ catalysts within a dielectric-barrier discharge (DBD) reactor. Plasma-assisted reduction (PAR) was applied to reduce the prepared $Pt/TiO_2$ catalysts in DBD reactor, and prepared catalysts were successively reduced by PAR within 20 min irrespective of the Pt loading and the calcination temperature. The highest methane conversion was 40% when 3 wt% $Pt/TiO_2$ and 5 wt% $Pt/TiO_2$ catalysts were used after calcination at $600^{\circ}C$. The selectivities of light alkanes ($C_2H_6$, $C_3H_8$, $C_4H_{10}$) were highly increased when $Pt/TiO_2$ catalysts were used in DBD reactor. 배리어(dielectric-barrier discharge: DBD) 반응기에서 솔-젤 방법으로 제조한 $Pt/TiO_2$를 넣고 플라즈마 에너지를 사용하여 메탄전환반응 연구를 수행하였다. 제조된 촉매는 기존 금속산화물과는 다른 방법으로 환원을 하였으며, 플라즈마를 사용한 환원방법(plasma-assisted reduction: PAR)이라고 명명하였다. $Pt/TiO_2$ 촉매는 Pt 담지량 및 소성온도에 관계없이 20분 이내에 환원이 완료되었다. 3 wt% $Pt/TiO_2$ 촉매와 5 wt% $Pt/TiO_2$ 촉매를 $600^{\circ}C$에서 소성하여 PAR 방법으로 환원했을 때 메탄의 전환율은 40%로 가장 높았다. DBD 반응기에서 $Pt/TiO_2$ 촉매를 사용하였을 경우 촉매가 없을 때보다 $C_2H_6$, $C_3H_8$와 $C_4H_{10}$과 같은 알칸의 선택성의 매우 높게 나타났다.
정밀고속 PRESS 하사점 변위량에 영향을 최소화 하는 금형 EMBO 장치에 관한 구조 연구
김승수,Kim, Seung-Soo 한국금형공학회 2016 한국금형공학회지 Vol.10 No.3
Laminate products for motor core are developed with a structure in which the importance of quality level and clamping force is influenced by the recent performance and safety of the product. It has been confirmed that the accuracy of the mold is emphasized, and that the accuracy of the tightening force produced by the stacked product for the motor core is greatly influenced by the change in the bottom dead center displacement of the aged high speed press. The reason why setting the mold, and test the effect of bottom dead center of high speed press is to improve product pull force in embossing process at mold. We have applied the system to minimize the effect on the damping displacement under the dynamical degree of the equipment by applying the emboss complement device which can test the influence and complement in the process.
Identification of Uranium Species Released from the Waste Glass in Contact with Bentonite
김승수,전관식,강철형,한필수,최종원,Kim Seung-Soo,Chun Kwan-Sik,Kang Chul-Hyung,Han Phil-Su,Choi Jong-Won Korean Radioactive Waste Society 2005 방사성폐기물학회지 Vol.3 No.3
Yellowish uranium compounds were enriched at the interface between a Ca-bentonite block and a waste glass, containing about $20\%$ uranium oxide, in contact with the block due to the dissolution of uranium by a synthetic granitic groundwater in Ar atmosphere. The uranium compound formed for 6 years leach time was identified as a beta-uranophane $[Ca(UO_2)_2(SiO_{3}OH)_{2}5H_{2}O]$ using XRD, IR and mass spectrometer. The solubility of the beta-uranophane was measured to be about $10^{-6}\;mole/L$ in de-mineralized water at $80^{\circ}C$.