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김상태,고우찬,이승우,김흥래,Kim, Sang-Tae,Koh, Woo-Chan,Lee, Seung-Woo,Kim, Heung-Rae 한국지하수토양환경학회 2015 지하수토양환경 Vol.20 No.7
In this study, we have developed the performance evaluation model for the optimal soil remediation technology selection. Performance evaluation model is composed in the evaluation of two steps. In the first stage, the candidate technologies are derived according to the conditions of drilling, type and concentration of pollutants, and the saturated/unsaturated of target site. In the second stage, each individual candidate technology is evaluated by performance evaluation model. The performance evaluation model has 5 groups of evaluation items and 12 evaluation items which have their own evaluation index and their own weights through the AHP approach surveying 40 experts. From the case study of actual design cases, the applicability of the performance evaluation model was confirmed.
피로수명예측을 위한 잔류강도 저하모델의 파라미터 결정법 제안(I)
김상태,장성수,Kim, Sang-Tae,Jang, Seong-Su 대한기계학회 2001 大韓機械學會論文集A Vol.25 No.5
The static and fatigue tests have been carried out to verify the validity of a generalized residual strength degradation model. And a new method of parameter determination in the model is verified experimentally to account for the effect of tension-compression fatigue loading of spheroidal graphite cast iron. It is shown that the correlation between the experimental results and the theoretical prediction on the statistical distribution of fatigue life by using the proposed method is very reasonable. Furthermore, it is found that the correlation between the theoretical prediction and the experimental results of fatigue life in case of tension-tension fatigue data in composite material appears to be reasonable. Therefore, the proposed method is more adjustable in the determination of the parameter than maximum likelihood method and minimization technique.
Ultra Real-Time PCR을 활용한 Avian Influenza Virus Subtype의 조기진단법
김상태,김영균,김장수,Kim, Sang-Tae,Kim, Young-Kyoon,Kim, Jang-Su 한국미생물학회 2011 미생물학회지 Vol.47 No.1
조류 인플루엔자 바이러스(AIV) 아형을 ultra-time PCR법(UPCR)을 이용하여 초스피드로 진단할 수 있는 방법을 고안하였다. 표적 대상의 프라이머는 AIV H5N1 아형의 hemagglutinin(HA) 유전자 중 가장 상보성이 높은 133 bp의 부위를 선택하였고, 실험의 안전을 위하여 인공합성의 방법으로 제작하였다. 압타머와 결합한 molecular beacon 기반 Mini-Opticon Q-PCR 기기를 사용한 UPCR법으로, 총 UPCR 반응액의 양을 10 ${\mu}l$으로, UPCR과 용융온도 분석시간을 15분 이내로 매우 짧게 단축시켰다. 민감도 측정에서 최소의 주형인 5분자의 HA 유전자만으로 정확히 AIV의 특이적 133 bp를 합성하였다. UPCR로 디자인된 이 PCR은 AIV 아형의 진단에 적용될 수 있을 뿐 아니라, UPCR이 기반되는 진단을 이용하여 다른 병원체에도 널리 적용 될 수 있을 것으로 기대된다. This ultra real-time PCR (UPCR) based diagnosis system for avian influenza A virus (AIV) subtype was designed. The target primer in this study was derived from H5N1 subtype-specific 133 bp partial gene of hemagglutinin (HA), and was synthesized by using PCR-based gene synthesis on the ground of safety. UPCR was operated by Mini-Opticon Q-PCR Quantitative Thermal Cycler using aptamer-based molecular beacon, total 10 ${\mu}l$ of reaction mixture with extraordinarily short time in each steps in PCR. The detection including UPCR and analysis of melting temperature was totally operated within 15 min. The AIV-specific 133 bp PCR product was correctly amplified until 5 molecules of HA gene as minimum of templates. This kind of PCR was drafted as UPCR in this study and it could be used to detect not only AIV subtype, but also other pathogens using UPCR-based diagnosis.
Circulant Matrix Factorization을 이용한 FIR/IIR Lattice 필터의 설계
김상태,임용곤,Kim Sang-Tae,Lim Yong-Kon 대한전자공학회 2004 電子工學會論文誌-TC (Telecommunications) Vol.41 No.1
We Propose the methods to design the finite impulse response (FIR) and the infinite impulse response (IIR) lattice filters using Schur algorithm through the spectral factorization of the covariance matrix by circulant matrix factorization (CMF). Circulant matrix factorization is also very powerful tool used for spectral factorization of the covariance polynomial in matrix domain to obtain the minimum phase polynomial without the polynomial root finding problem. Schur algorithm is the method for a fast Cholesky factorization of Toeplitz matrix, which easily determines the lattice filter parameters. Examples for the case of the FIR filter and for the case of the In filter are included, and performance of our method check by comparing of our method and another methods (polynomial root finding and cepstral deconvolution). Circulant Matrix Factorization (CMF)는 covariance 행렬의 spectral factorization된 결과를 얻을 수 있다. 우리는 얻어진 결과를 가지고 일반적으로 잘 알려진 방법인 Schur algorithm을 이용하여 finite impulse response (FIR)차 infinite impulse response (IIR) lattice 필터를 설계하는 방법을 제안하였다. CMF는 기존에 많이 사용되는 root finding을 사용하지 않고 covariance Polynomial로부터 minimum phase 특성을 가지는 polynomial을 얻는데 유용한 방법이다. 그리고 Schur algorithm은 toeplitz matrix를 빠르게 Cholesky factorization하기 위한 방법으로 이 방법을 이용하면 FIR/IIR lattice 필터의 계수를 쉽게 찾아낼 수 있다. 본 논문에서는 이러한 방법들을 이용하여 FIR과 IIR lattice 필터의 설계의 계산적인 예제를 제시했으며, 제안된 방법과 다른 기존에 제시되었던 방법 (polynomial root finding과 cepstral deconvolution)들과 성능을 비교 평가하였다.
김상태,Kim, Sang-Tae 한국건강관리협회 1987 건강소식 Vol.11 No.1
직장인의 스트레스와 나아가 이로 인한 정신장애의 극복책은 우선적으로 스트레스의 바른 해소책 개발과 인격적 취약성의 자각 및 인격 성숙을 위한 부단한 노력 이다.
흰쥐 정소세포에서의 Cadmium 독성 작용과 Selenium 전처리의 영향
김상태,부문종,최임순 ( Sang Tae Kim,Moon Jong Boo,Rim Soon Choe ) 한국환경생물학회 1990 환경생물 : 환경생물학회지 Vol.8 No.1
To investigate the cadmium toxicity to testis and the effect of selenium pretreatment, male rats were subcutaneously injected with Cd and/or Se prior to Cd. In doing so, the respiration rates of mitochondria, the lysosomal activities of acid phosphatase and the cellular levels of GSH were measured. Also, the testicular ultrastructures were observed. Cd only-treated group showed that the respiration rates of mitochondria, the lysosomal activities of acid phosphatase and the level of GSH were reduced on the whole. In contrast to above group, Se-pretreated group appeared to be recovered: the respiration rate was restored more than that of control group and the enzyme activity was restored somewhat, however less than that of the control group. The level of GSH was recovered to the level of control group in Se-pretreated group. According to ultrastructural studies, Cd-treated group showed the swelling and destruction of mitochondria and the production of lipid droplets. In contrast, Se-pretreated group appeared not to be different from control group. So, all of these results would indicate that Se has a protective function against Cd toxicity in the rat testis.