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변재현(Jae-Hyun Byun),이승미(Seung-Mi Lee) 한국신뢰성학회 2016 신뢰성응용연구 Vol.16 No.1
Purpose: The purpose of this study was to evaluate performance reliability of stroke patients using kinematic analysis. Methods: A protocol to evaluate performance reliability was performed for three tasks on 20 stroke patients and 10 normal people. The tasks include hand to head (HH) task, hand to mouth (HM) task, and hand to target (HT) task. Results: The affected arms showed smaller joint angle, slower peak velocity, longer time to peak velocity for task performances than control group. Also, slower peak velocity and longer movement time for task performance in unaffected arm of stroke patients were obtained compared with the control group. Conclusion: Kinematic analysis is very useful quantitative tool to provide understanding on upper extremity function of stroke patients.
변재현(Jae-Hyun Byun),홍완기(Wan-Ki Hong) 한국신뢰성학회 2016 신뢰성응용연구 Vol.16 No.2
Purpose: To evaluate statistical differences among three measurements of range of motion(ROM) with Rapael Smart Glove (RSG) group 1, 2 and manual goniometer group. To investigate reference value of the kinematic analysis for range of motion (ROM) of distal upper extremity with Rapael Smart Glove (RSG). Methods: Sixteen normal persons without limitation of motion (LOM) enrolled in the study. The study was performed at two separate times and by two investigators on 16 normal adults. We compared ROM with RSG for measuring joint angles. We compared degrees of forearm supination/pronation, wrist flexion/extension and radial deviation/ulnar deviation during ROM of 16 participants using RSG. After one week, degrees of each motion were measured in the same way by other investigator to evaluate the reliability. Results: Statistical differences among three groups were showed. Most results of paired t-test between two RSG groups were over 0.05 and exceptions are supination, extension, and finger %. Conclusion: Our findings demonstrate that ROM of normal persons obtained by kinematic analysis with RSG are not valid as normal reference value for distal upper extremity motion. But, the reliability of between two RSG groups was showed with paired t-test and Pearson’s correlation except supination, extension and finger %.
참나무림내 천연발생한 잣나무 치수의 지상부 현존량 및 양분분포
지동훈(Dong-Hun JI),변재경(Jae-Kyoung Byun),정진현(Jin-Hyun Jeong),이명종(Myong-Jong Yi) 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.6
잣나무는 우리나라의 대표적인 조림수종으로서 종자가 비산하지 못하고 조류나 설치류등의 동물에 의해 운반, 산포됨으로써 잣나무 인공조림지 주변 산림의 하층에 잣나무 치수가 천연 발생하게 된다. 조사 임분 내에서는 직경급, 수고급별 분포에서 역 J자형을 나타내는 음수의 잣나무가 상층의 참나무림에 의해 낮은 광환경과 토양의 비옥도가 낮은 조건하에서 생육하고 있다. 조사 임분은 비교적 온도가 높고 건조한 남서사면이지만 상층의 참나무림 임관에 의해 완화되며, 따라서 잣나무 종자의 발아나 치수를 보호하는 미세 입지환경을 제공 할 수 있을 것으로 생각된다. 잣나무 치수의 전체 현존량은 잣나무 인공림에 비해 높았으며 참나무림 하부의 낮은 광 환경에서도 적응하는 것으로 생각된다. 각 기관별 질소와 인의 농도는 인공 잣나무림 및 혼효하는 참나무림의 각 기관별 농도보다 낮았으며 양분량도 현존량에비해 상대적으로 적었다. 이들 양분은 일반적으로 식물의 성장에 필요한 주요 성분이므로 잣나무와 활엽수 혼효림의 시업에 있어서 지조부는 임상에 존치 시키는 것이 유리할 것으로 판단된다. The occurrence of Korean pine (Pinus koraiensis) advance growth has been noticed in the deciduous oak forest being adjacent to the mature Korean pine plantation. the korean pine seedlings in the forest were regenerated naturally from harvested and transported Korean pine seeds and cones by rodents, mainly red squirrels. Mongolian oak (Quercus bariabilis), which formed dominant overstory, had close-to-normal distributions of height, diameter and age classes. Korean pine, which dominated the understory, had the reverse J-shaped height, diameter and age distributions that are expected of a shade tolerant species. Growing in the summer shade of the oak, Korean pine seedling had slow, but steady height growth during the past four decades. Total biomass of Korean pine seedling ranged from 2,835-8,541 kg ha<SUP>-1</SUP> and biomass allocation of Korean pine seedling was follows : stem (with bark) 〉 foliage 〉 branches 〉 roots. Korean pine seedlings allocated more biomass to foliage and branches compare to planted Korean pine. The smaller root/shoot ratio of Korean pine seedling in the site is to believed to be result of competition for light. Contents of N and K for Korean pine seedling were greatest in foliage follow by branches, stem ad roots, while content of P was greater in the order of foliage 〉 roots 〉 stem 〉 branches.
아이스하키 공격수와 수비수간의 체성분, 체격, 체력별 수준 및 등속성 회전력에 대한 비교연구
지용석(Yong Suk Jee),김명화(Myung Hwa Kim),유재현(Jae Hyun Yoo),이창영(Chang Young Lee),변재종(Jae Jong Byun),현광석(Kwang Suk Hyun),이창규(Chang Kyu Lee),유광욱(Kwang Wook Yoo) 한국체육교육학회 2002 한국체육교육학회지 Vol.7 No.1
The purpose of this study was to investigate the difference in physique, physical fitness and isokinetic strength of Forward(FW=10) and Defense(DF=9) in Korean professional ice hockey players. The subjects selected for this study were composed of nineteen male professional ice hockey players. They didn`t have any previous medical or physical problems. They were measured physique, body composition, physical fitness and isokinetic knee strength test. All of data were analyzed utilizing independent t-test by SPSS 10.0. The level of statistical significance was set at p<.05. On the basis of the results analyzed in this study, the conclusion was as follow: 1. The variables of body composition were no significant differences between ice hockey FW players and DF players. 2. In physique variables, the height of ice hockey DF players was significant higher than FW players and remainders of physique variables were no significant differences between both groups. 3. The level of physical fitness variables were no significant differences between ice hockey FW players and DF players. 4. In knee isokinetic strength test, the peak torques of flexor and extensor in a left knee joint of ice hockey between DF and FW players were not significant different, but the peak torques of flexor and extensor in a right knee joint of ice hockey DF players were significantly higher than those of FW players. In conclusion, ice hockey players have the difference in physique and isokinetic knee strength between FW and DF players. Therefore, it is very important that the player should be trained up considering their characteristics according to the players` position.
제주개의 microsatellite 마커를 이용한 유전적 다양성 분석
고민정(Minjeong Ko),권슬기(Seulgi Kwon),김혜란(Hye-Ran Kim),변재현(Jae-Hyun Byun),김대철(Dae-Cheol Kim),최봉환(Bong-Hwan Choi) 한국생명과학회 2019 생명과학회지 Vol.29 No.6
본 연구에서는 우리나라 토종견인 제주개의 보존·보호를 위해 그에 대한 유전적 특성을 파악하고자 개 7품종 (제주개, 동경개, 독일 세퍼트, 진도개, 라브라도 레트리버, 풍산개, 삽살개)에 대해 총 139두와 microsatellite 마커 16종을 이용하여 대립유전자형을 분석하였다. 그 결과 16종의 marker에서 131개의 대립유전자 좌위를 확인하였고, 이 중 FH3381에서 18개의 가장 많은 대립유전자형이 확인되었으며 FH2834는 대립유전자형이 2개로 가장 적게 확인되었다. 또한, 마커별 기대되는 이형접합도의 전체적 평균치를 보았을 때 기대이형접합도와 관측이형접합도가 외래견보다 토종개가 높게 나타났고 PIC값은 0.000부터 0.862로 확인되었다. 제주개와 다른 품종 간의 계통수를 분석한 결과 삽살개와 94%로 가장 가까운 것으로 확인 되었다. 제주개와 다른 품종들 간의 유전적 거리를 확인한 결과 삽살개가 0.393으로 가장 가깝게 나타났고 토종개 중에서는 동경개와의 거리가 0.507로 가장 먼 것으로 나타났다. 개체별의 분포도를 살펴보면 제주개는 레트리버, 삽살개와 같은 그룹 내에 존재하였고 풍산개, 동경개, 진도개, 셰퍼트가 같은 그룹 내에 존재한 것을 알 수 있다. 따라서 본 연구 결과를 통해 확인된 유전적 특성 정보들은 제주개의 유전적 특성 연구에 이용할 수 있는 기초적 자료로 활용가치가 높은 것으로 사료된다. This study was conducted to analyze the genetic characteristics of the Jeju dog for preservation and protection. A total of 139 dogs from 7 dog breeds, including the Jeju dog, were genotyped using 16 microsatellite markers. The results revealed 2-18 alleles per locus, with a total of 131 alleles among the 16 markers. Most alleles were identified for FH3381, which had 18 alleles, whereas FH2834 had the fewest alleles, with just 2. When the total mean value was observed, the expected heterozygosity and observed heterozygosity were higher for than for outgroup dogs, and the PIC values ranged from 0.000 to 0.862, respectively. The phylogenetic tree analysis of the Jeju dog and other dog varieties revealed that the Jeju dog is closest to the Sapsal dog (0.393). The phylogeny between the Jeju and Korean domestic dogs showed that the Jeju dog is most distant from the Dongkyung dog (0.507). Looking at the distribution individually, the Jeju dog is in the same group as the Labrador Retriever and the Sapsal dog. Meanwhile, the Poongsan, Dongkyung, and Jindo dogs and the German Shepherd were in the same group. Genetic information confirmed through the results of this study can be used as basic data to study the genetic characteristics of the Jeju dog.