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신경회로망을 이용한 심전도 데이터 압축 알고리즘에 관한 연구
김태국,이명호 대한의용생체공학회 1991 의공학회지 Vol.12 No.3
This paper describes ECG data compression algorithm using neural network. As a learning method, we use back error propagation algorithm. ECG data compression is performed using learning ability of neural network. CSE database, which is sampled 12bit digitized at 500samp1e/sec, is selected as a input signal. In order to reduce unit number of input layer, we modify sampling ratio 250samples/sec in QRS complex, 125samples/sec in P & T wave respectively. hs a input pattern of neural network, from 35 points backward to 45 points forward sample Points of R peak are used.
Factors Affecting the Maintenance of Hybrid $2{\mu}m$ Circle-Based Plasmids
김태국,최철용,노현모,Kim, Tae-Kook,Choi, Cheol-Yong,Rho, Hyune-Mo 생화학분자생물학회 1989 한국생화학회지 Vol.22 No.2
효모내에 자연적으로 존재하는 $2{\mu}m$ plasmid를 이용하여 여러 유전자 운반체를 재조합하였다. 만든 유전자 운반체들의 기능을 알기 위하여 형질 전환력, 안정도, 복제수 그리고 외래 유전자로써 HBsAg 유전자의 발현 정도를 효모 균주 SHY4 $(cir^+)$와 NNY1 $(cir^0)$에서 비교 조사하였다. 조사 결과를 정리해보면, 첫째, $2{\mu}m$ plasmid DNA를 전부 가지는 유전자 운반체가 일부만 가지는 것보다 안정도와 복제수가 높다. 둘째, $2{\mu}m$ plasmid의 A 또는 B 형태는 복제에 별다른 영향을 미치지 않는다. 세째, ADH I 유전자의 promoter로부터의 강한 전사는 재조합된 유전자 운반체의 복제에 영향을 미치지 않는다. 네째, bacterial sequences가 제외된 새로운 유형의 유전자 발현 운반체가 가장 높은 정도로 HBsAg를 세포내에 $2{\mu}m$ plasmid가 없는 효모 균주 NNY1 $(cir^0)$에서 발현시킨다. The replication functions associated with yeast $2{\mu}m$ plasmid were investigated. We constructed various vectors from $2{\mu}m$ plasmid and analyzed their transformation efficiency, stability, copy number and expression of hepatitis B viral surface antigen gene as a foreign gene in $(cir^+)$ and $(cir^0)$ yeast strains. The results showed that (i) plasmid containing complete $2{\mu}m$ circle genome showed higher stability and copy number than vector containing the segment of $2{\mu}m$ circle; (ii) plasmid derived from $2{\mu}m$ plasmid of A or B form showed similar stability and copy number irrespective of orientation of unique regions; (iii) expression from alcohol dehydrogenase I gene promoter in $2{\mu}m$ plasmid did not affect the replication of constructed plasmids; (iv) $2{\mu}m$-based plasmid without bacterial sequences showed higher stability and copy number than chimeric plasmid, and expressed higher hepatitis B viral surface antigen gene in $(cir^0)$ yeast strain which does not contain $2{\mu}m$ plasmid.
오시덕,권용호,김태국 중앙대학교 기술과학연구소 1994 기술과학연구소 논문집 Vol.24 No.-
In this study a computer program has been developed to analyze the thermal and hydraulic performance of waste heat recovery boilers. Using the program developed in this study, the thermal and hydraulic performance data of a 3T/hr boiler are obtained for 100%, 75%, 50% and 25% loads. The results include the expected steam capacity, the local gas/water temperatures, and gas side pressure drop etc. For 100% load, comparison of the current results with those obtained from existing boiler code show fairly good agreements.
김태국,한규익,서석호,오시덕,권영호,방효선 대한기계학회 1995 대한기계학회 춘추학술대회 Vol.- No.-