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[論文] 차량용 시트의 설계품질 향상을 위한 안전공학 및 인간공학에 관한 연구
이장무(J. M. Lee),염영하(Y. H. Yum),성명호(M. H. Sung),신승훈(S. H. Shin) 한국자동차공학회 1986 오토저널 Vol.8 No.3
The safety and comfort of car seats were studied by utilization of engineering analysis/ experiment and human engineering data. As important factors of the static seating comfort, static spring constant, body pressure distribution, driving posture were discussed. In connection with the dynamic seating comfort, vibrational characteristics of domestic car seats (natural frequencies, damping, frequency spectrum, transmission ratio) were measured and discussed. Finally, the safety of the seat was analyzed and evaluated through calculation and experiments.
사료내 이용가능 인의 수준과 미생물 Phytase 의 첨가가 잉어 치어의 성장과 체조직 조성에 미치는 영향
김정대,신승훈 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.2
Growth, nutrient utilization and body tissue composition were investigated in juvenile carp (Cyprinus carpio) fed diets which meet either 100% (100P), 70% (70P) or 38% (38P) of phosphorus (P) requirements. Diet 70MP, in which microbial phytase of 1000 units was incorporated into diet 70P, was made in order to study to what extent growth and P utilization could be improved. Available P in diet was adjusted to 0.64%, 0.44% and 0.24% using monocalcium phosphate (MCP). Diets were fed to fish with an average weight of 10.3 g for 8 weeks. The best weight gain and specific growth rate were found in fish fed 100P (28.5 g and 2.38%), which were not significantly different (P$gt;0.05) from those (27.8 g and 2.34%) of fish fed 70MP. The lowest values (19.7 g and 1.90%) were obtained in fish fed 38P. Feed conversion ratio ranged from 1.06(100P) to 1.43 (38P), the latter showing a difference from other groups. Nitrogen and phosphorus gains in whole body were higher (P$lt;0.05) in fish groups fed diets 100P and 70MP than in the other two groups. The lowest moisture content (71.9%) was shown in fish fed 38P with the highest protein (15.3%) in whole body. Fish fed 70MP showed the lowest lipid content (7.8%), which w as. however, not different from that (8.6%) of 100P groups. Whole body P content of 100P groups (0.54%) was comparable with that of 70MP groups (0.52%), which was, however. not different from those of the other two groups. Ca and P levels in skin and bone were highest in fish fed 70MP. though there were no significant differences among 100P, 70P and 70MP groups. The present results indicated that available P in diet greatly affected both growth performance and composition of whole body, tissue and bone of juvenile carp. And also. it was revealed that microbial phytase could replace 1% of MCP without any significant difference in criteria above-mentioned.