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윤희중,여홍철,김태삼 한국운동역학회 2001 한국운동역학회지 Vol.11 No.1
The purpose of this study was to investigate the effect of the kinematic factors about event of the Yeo2 motion on the Horse Vault. The subject in this study was 1 male gymnast to performance Yeo2 motion. Two video cameras were used to attain kinematic variables by phase. As a result, the following conclusion was drawn; 1. As the take-off time on the board was short, it appeared to increase horizontal and vertical velocity. In the motion, the flight apex height increased largely, too. 2. As the contact time on the board was short, it appeared to performance the air motion smoothly by increasing the horizontal distance and apex height. 3. The horizontal and vertical velocity in take-off on the board appeared increase horizontal distance and apex height. 4. To increase the apex height and horizontal distance, the body appeared to must be take the posture of vertical axis in take-off on the board.
김규석,임용수,이중의,서길준,윤여규,어은경,염석란,정연권,이윤성 대한응급의학회 2000 대한응급의학회지 Vol.11 No.4
Background: This study was conducted to analyze the current problems in completing death certificates and to identify the correct method for completing death certificates Methods: We reviewed 262 death certificates in three hospitals from March 1 to April 30, 2000, and 119 death certificates in one hospital from March 1 to 31, 2000. We identified major and minor errors and analyzed and compared them retrospectively. Results: A total of 381 death certificates were reviewed: 59 in Seoul National University Hospital,101 in Ewha Woman's University Hospital, and 102 in Gachon Medical College Hospital, which has no education program for completing death certificates in postgraduate training, and 119 in Samsung Medical Center which has an education program for completing death certificates. 358 certificates(94.0%) had at least one error. There were only 23 death certificates(6.0%) without an error. In 182 cases(47.8%), there was one major error. In 321 death certificates(84.3%), there were more than two errors. A comparison of Samsung Medical Center with the other hospitals showed that the number of total errors was statistically different(p=0.001). Conclusion: There were few death certificates without an error in this study. In a hospital which has postgraduate training in completing death certificates, there are fewer errors than in other hospitals which have no training course. Emergency physicians actually certify many deaths, so they must know the correct method of completing death certificates for statistics on morbidity and mortality.
Biomass Production of Anoectochilus formosanus Hayata in a Bioreactor System
( Yeo Joong Yoon ),( Hosakatte Niranjana Murthy ),( Eun Joo Hahn ),( Kee Yoeup Paek ) 한국식물학회 2007 Journal of Plant Biology Vol.50 No.5
We investigated the factors that affect biomass production from Anoectochilus formosanus in a bioreactor system. Those factors included inoculum size, initial sucrose concentration, media supplements, photosynthetic photon flux density (PPFD), and culturing methods. An inoculum size of 8 g L-1 was most suitable for shoot proliferation; biomass accumulation was optimized when the medium was supplemented with 3% sucrose compared with sucrose-free media or those containing concentrations of 6% or 9%. This accumulation also was enhanced under a PPFD of 50 μmol m-2 s-1. Likewise, the addition of coconut water (50 mL L-1) plus activated charcoal (0.5 mg L-1) to our Hyponex medium proved most beneficial. Comparative studies among three bioreactor systems - continuous immersion, raft (net), and temporary immersion (the ebb and flood system) - revealed that shoot proliferation and biomass accumulation were more efficient when culturing was performed under continuous immersion.
윤여중(Yeo-joong Yoon),최지우(Ji-Woo Choi),채종수(Chae-Jong Soo),서창호(Chang-Ho Seo) 한국정보기술학회 2010 Proceedings of KIIT Conference Vol.2010 No.-
네트워킹 기법을 이용하여 다수의 디스크 또는 스토리지를 연결하고 I/O처리를 분산시키는 병렬 파일 시스템의 개념을 만들었다. 즉, 다수의 컴퓨터에 장착된 디스크나 스토리지를 네트워크로 연결하여 하나의 논리적인 파일 시스템으로 구성함으로써 유휴 자원의 활용, I/O 처리 대역폭 증대 등의 효과를 기대할 수 있다. 특히 PVFS(Parallel Virtual File System)의 경우 클러스터 시스템의 확산과 함께 병렬 파일시스템 연구에 활발히 이용되고 있다. 본 논문에서는 기존의 파일 시스템들의 로깅 방법들을 알아보고, 클러스터 시스템에서 널리 이용되고 있는 파일 시스템인 PVFS(Parallel Virtual File System)에서 동적 I/O연산 로깅 시스템을 설계하였다. The concept of a parallel file system which connects multiple disks or storages and distributes I / O processing by using networking techniques. In other words, we can expect an effect of applying unused resources and increasing bandwidth I/O for processing through organizing one logical file system by connecting disks or storages attached many of computers with network. Especially, PVFS(Parallel Virtual File System), is widely used in research of parallel file system with spread of cluster system. In this paper, we surveyed the logging methods of the existing file systems and designed and implemented logging system of dynamic I/O arithmetic in PVFS(Parallel Virtual File System) cluster system.