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이동훈,김영준,강현삼,이병재 한국유전학회 1986 Genes & Genomics Vol.8 No.2
The nucleotide sequences of tRNAs were compared and the homologies between a pair of sequences were calculated. The homology is high between phylogenically related organisms, but low between eukaryote and prokaryote. The organelle's tRNA sequence shows very lower homology with chromosomal tRNA sequence. The homology and evolotionary distance was obtained by the method of Kimura (1980) with the sequences of chromosomal tRNAs which have the same anticodon (GUC) to compare orthologous genes. The phylogenic tree was constructed by unweighted pairgroup method using arithmatic average (UPGMA). The time of divergence of prokaryote and eukaryote was estimated to be 6.4×10^(10) years ago and the branching order in this phylogenic tree was in good agreement with that obtained by primary protein structures and 5S rRNA sequences.
이동훈,장성록,목연수,전경원 한국산업안전학회 1993 한국안전학회지 Vol.8 No.3
Automation and mechanization of work make people put the machine into operation and watch the state of operations. In the process of those works, they are apt to have accidents caused by their carelessness. To reduce such accidents, we can practise TOUCH and CALL, which is to indicate and ascertain the dangerous parts at every process before performing works. The objectives of this study are to show quantitatively the efficiency of TOUCH & CALL and to examine the effects of S-R compatibility. The results show that reaction time is longer(0.138-0.279sec.) in case of indicating with fingers and shouting than that of responding only visually. On the other hand, the error rate decreases by 3. 3 times -7times. From this, it is considered to verify quantitative estimation on multiple feedback of TOUCH & CALL.
이동훈,박성우,남종길,이승수,한지연,이준우,정문기 연세대학교의과대학 2017 Yonsei medical journal Vol.58 No.5
Purpose: To determine the efficacy of cognitive targeted prostate biopsy using biparametric magnetic resonance imaging (b-MRI) for patients with prostate-specific antigen levels under 10 ng/mL. Materials and Methods: We reviewed data from 123 consecutive patients who underwent cognitive targeted prostate biopsy usingprostate MRI. Of these patients, the first 55 underwent prostate biopsy using multiparametric MRI (mp-MRI), and the remaining68 underwent prostate biopsy using b-MRI. For b-MRI, we generated T2 weighted axial imaging and diffusion-weighted imaging sequences. We found that 62 of the 123 men had suspicious lesions on MRI (32 of the 55 men in the mp-MRI group and 30 of the 68 men in the b-MRI group). We compared the prostate cancer detection rates and the proportions of clinically significantprostate cancer between the different MRI sequences. Results: Between the two MRI groups, there were no statistically significant differences in prostate cancer detection rate and proportionsof clinically significant prostate cancer (41.8% vs. 30.9%, p=0.208 and 82.6% vs. 76.2%, p=0.598). Among the 62 men who had suspicious lesions on MRI, the prostate cancer detection rates were 62.5% and 63.3% (p=0.709) in the mp-MRI and b-MRI groups, respectively, and the proportions of clinically significant prostate cancer were 95.0% and 84.2% (p=0.267). Conclusion: Prostate biopsy using b-MRI showed similar performance to that using mp-MRI for detecting prostate cancer and clinically significant prostate cancer. Considering the satisfactory performance and cost effectiveness of b-MRI, this technique could be a good option for obtaining intraprostatic information for first round prostate biopsy.