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곰솔과 소나무의 자연잡종으로 추정되는 잡종소나무의 특성
손두식(Doo Sik Son),권칠용(Chil Yong Kwon),박상준(Sang Jun Park) 한국산림과학회 1990 한국산림과학회지 Vol.79 No.2
This study was carried out to investigate some characteristics of selected trees recognized as natural hybrid between Pinus densiflora and Pinus thunbergii for improving resistance to pine leaf gall midge. `Che results obtained were as follows. l. In the mean annual increment and the growth in the period of latest 5 years of DBH, hybrid pines showed intermediate value of the parents, Pinus densiflora and Pa`nus thunbergii. However, there was remarkable variation among individuals of hybrid pine. 2. The trees having resin duct index(RDI) value larger than 0.1 for the position of resin duct in needle was classified as hybrid pine. The leaf and leaf sheath of Pinus thunbergii was longer than that of Pinus densiflora and the distance between rows of stomata on needles of Pinus thunbergii was longer than that of Pinus detasiflora, and the values of those observations on hybrid pine were intermediate between the parent species. However, differences among individual was observed. 3. In the size of cone and seed, and weight of 1000 seeds, like in the leaf characteristics, Pinus thunbergii showed higher value than Pa`nus densiflora and those values of hybrid were intermediate between the parent species. 4. Assuming isoenzyme ADH-B₂, ME-A₂, PGI-B₁, and PGI-B₂ alleles observed in the hybrids were introgressed from Pinus thunbergii, the hybrid pine can be easily identified by these isoenzyme alleles. However, the individuals which do not have those alleles can not be identified.
최혁재(Hyuk Jae Choi),강성재(Sung Jae Kang),권칠용(Chil Yong Kwon),류제청(Jei Cheong Ryu),이석민(Suk Min Lee),문무성(Mu Seong Mun) 제어로봇시스템학회 2010 제어·로봇·시스템학회 논문지 Vol.16 No.9
In this study, the control method of assistive robot was developed for the elderly. The control method of gait-assistant-robot was proposed considering the change of COP (Center of Pelves), BOS (Base of Support) and comparative analysis of the moving velocity for the elderly. We analyzed the movement of COP of the body and its velocity of the elderly equipped with manual walker and gait-assistant-robot. As a result, change in COP was greater from left to right than from anterior to posterior; also, the average velocity of the movement of COP and manual walker for manual walker gait was 0.7(m/s). Therefore, it is necessary to concern more on the left-right balance and synchronization of the velocity of COP.