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崔鳳煥 慶北工業專門大學 1974 論文集 Vol.11 No.-
Study on noise characteristic of high frequency elements, noise and noise flgure of transistor and input impedance. Which in clude internal noises of electronics circuits.
돼지 leptin receptor내 초위성체 다형성과 경제형질과의 연관성 구명
최봉환,김태헌,조용민,이혜영,전진태,정일정 한국동물자원과학회 2003 한국축산학회지 Vol.45 No.5
The leptin receptor gene(LEPR) produces a high affinity receptor that mediates the regulation of the leptin gene. Leptin secreted from adipose tissue plays an important role in regulating feed intake and energy balance. In this study, a microsatellite marker within LEPR was selected and genotyped for the F_92) population composed of 354 individuals from an intercross between Korean Native boars and Landrace sows. Totally, six alleles (255,259, 261, 263, 265 and 267bp) and nineteen genotypes were detected in the population, of which the CE (261/265), CC (261/261) and EE (265/265) types were observed by 20.0%, 10.1% and 9.6% respectively. Relationships between their genotypes and economic traits were analyzed. We found specific genotypes associated with economic traits such as body weight at 12 weeks of age/body fat including abdominal and trimmed fat/shear force (p<0.001), body weight of 30 weeks of age (P<0.01) and body weight of 3 weeks of age/back fat thickness (P<0.05). The DD (263/263) and DF (263/267) types were associated with body weight at 3, 5, 12 and 30 weeks of age. The DF (263/267) type showed a highly singificant effect on back fat thickness and body fat including abdominal and trimmed fat. The DF (263/267) type showed positive effect on shear force, whereas the BB (259/259) and DD (263/263) types negatively affected on tenderness.
崔鳳煥 慶北工業專門大學 1977 論文集 Vol.14 No.-
The auther has developped a relatively simple DM codec unit suitable for the field telephone system. The unit consisting from a Goto pair and a single integrator as the coder while a monostable multivibrator as the decoder was proved to be simple yet reliable DM codec, which can provide a digital communication channel with the SNR of dB under various sampling frequencies. In this paper, the auther reports the designing details, circuit construction and the result of the series of tests conducted on the developped unit.