Jane Austen : 「傲慢과 偏見」 小考

金承洙 경희대학교 언어연구소 1982 언어연구 Vol.3 No.-

THE REPRESENTATION OF THE GOLDEN RATIO BY THE CONTINUED FRACTION

김승수,고미연,이용훈 호남수학회 2014 호남수학학술지 Vol.36 No.1

There are several theories to say that `Mathematics is beautiful', but the typical one of them is a theory about the golden ratio. Often the golden ratio apt to be considered only as the geometric shapes or the simple number of ratioused in buildings and arts. However in this paper, we studied to consider the mathematical theories which are contained in their inside. In particular, we investigate the various expressions of the continued fraction which are represented by the golden ratio.

국내 PWR 사용후핵연료에서 세슘, 스트론튬과 요오드의 갭 및 입계 재고량 측정

김승수,권수한,강광철,최종원,조원진,서항석 한국방사성폐기물학회 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 its 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. 처분장에서 지하수로 쉽게 유출될 수 있는 방사성 핵종들의 양을 예측하기 위하여 국내 PWR 사용후핵연료 팰렛들의 갭(gap) 및 입계에 있는 용해성 원소들의 재고량을 측정하였다. 연소도가 45~66 GWD/MTU를 갖는 연료봉에서 얻은 펠렛들에서 세슘의 갭 재고량이 0.85~1.7%로 나타났으며, 이는 핵분열 생성기체 유출률의 1/6~1/3에 해당하였다. 그러나 핵분열 생성기체 유출률이 1%이하인 연료봉에서 취한 40 GWD/MTU이하의 연소도를 갖는 펠렛들의 경우, 세슘의 갭 재고량들을 핵분열 생성기체 유출률과 연관시키기는 곤란하였다. 갭 및 입계내 스트론튬의 재고량은 동일 연료봉내 펠렛에서는 크게 다르지 않았으며, 요오드의 갭 재고량은 핵분열 생성기체 유출률보다 작거나 유사한 값을 갖는 것으로 평가되었다.

1990년 이후 강원 영동지역 산불 변화 특성

김승수,이명욱,이종호 한국방재학회 2015 한국방재학회논문집 Vol.15 No.4

The incidence and the area of forest fires at Yeongdong in Gangwon-do were increased in 2000s compared to 1990s. However, few research have tried the increase of forest fires depending on the effect of the variation of weather on meteorological factor. Precipitation, duration of precipitation, and relative humidity at Yeongdong were decreased during warning period of forest fires in 2000s, whereas mean temperature and days of minimum humidity were increased, and days of precipitation and mean wind velocity did not much change. To see the effect of the incidence of forest fires, multiple regression analysis was applied for dependent variable (occurrences and area of forest fires) and independent variable (precipitation, duration of precipitation, relative humidity, days of minimum humidity, mean temperature and mean wind velocity). The analysis results showed that the incidence of forest fire was highly affected by days of minimum humidity and mean wind velocity, and the area of forest fire was affected by mean wind velocity. 강원도 영동지역은 '90년대에 비해 2000년대에 산불발생건수와 피해면적이 많이 증가하였다. 그러나 기후변화에 따라 변화하는 기상인자를 산불과 비교분석한 연구는 많지 않다. 영동지역의 산불조심기간 중 기후분석 결과 '90년대에 비해 2000년대의 강수량. 강수계속시간, 상대습도는 감소하였고 평균기온과 최소습도일수는 증가하였으며 강수일수와 평균풍속은 큰 변화가 없는 것으로 분석되었다. 이러한 기후변화가 산불에 미치는 영향을 알아보고자 1991년-2009년에 발생된 산불발생건수와 피해면적을 종속변수로 기상인자인 강수량, 강수일수, 상대습도, 최소습도일수, 평균기온, 평균풍속을 독립변수로 하는 다중회귀분석을 실시하였다. 산불발생건수는 최소습도일수와 평균풍속이 가장 큰 영향인자로 나타났으며 산불피해면적은 평균풍속이 가장 큰 영향을 미치는 것으로 분석되었다.

지방행정종합정보공개시스템 구축의 의미와 발전방향

김승수 한국정책분석평가학회 2007 한국정책분석평가학회 학술대회발표논문집 Vol.2007 No.세미나

DBD 반응기에서 솔-젤 법으로 제조된 Pt/TiO₂ 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.

High Speed Press 하사점 변화에 따른 엠보싱 높이 변화 연구

김승수,김세환,이춘규,Kim, Seung-Soo,Kim, Sei-Whan,Lee, Chun-Kyu 한국금형공학회 2016 한국금형공학회지 Vol.10 No.2

Production machines have been more important, due to quality level of vehicle motor core is getting higher. That is why, to improve assembly fit of tooling and to be emphasized how much moving down caused of deterioration of high speed press, it is also getting more important parts as solution of problems. To analyze how much move based on condition of movement as tooling and high speed press, and to measure how much impact to embossing height caused of changing movement down. As the result of investigation, in case of material thickness 0.5mm, there is highest pull and force power when emboss height is 0.45mm. If emboss height is less than 0.45mm, pull and force power is getting lower, if emboss height is higher than 0.45mm, it is impossible to make it forming caused of changed press movement, also it has been piercing.

OPTIMIZATION FOR THE BUBBLE STABILIZED LEGENDRE GALERKIN METHODS BY STEEPEST DESCENT METHOD

김승수,이용훈,오은정 호남수학회 2014 호남수학학술지 Vol.36 No.4

In the discrete formulation of the bubble stabilized Legendre Galerkin methods, the system of equations includes the artificial viscosity term as the parameter. We investigate the estimation of this parameter to get the optimal solution which minimizes the maximum error. Some numerical results are reported.

$5\times5$ 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.