漕艇競技의 運動强度와 適正페이스 分析에 관한 硏究

李相于,朴哲浩,辛尙根,金榮俊 東亞大學校附設스포츠科學硏究所 1991 스포츠科學硏究論文集 Vol.9 No.-

The purpose of this study was focused on the degree of work intensity and optimal race pace in rowing for Korean national male and female rowers. The items in physique were body height and body weight. Body density was estimated from the sum of two skinfold using the regressional equations suggested by Nagamine et al.(1972). Percent fat was calculated by Brozek et al.(1963) formular. Somatotype was calculated by Health-Carter(1981) anthropometric somatotype method. Maximal oxygen uptake measurements were continued while the work load increased by a uniform amount each 40m/4min for male and 30m/4min for female on the treadmill ergometer. The grade was constant at 0% and the initial speeds were 160m/min for male rowers and 120m/min for female rowers. Heart rate was recorded continuously all through the experiment of actual rowing by using telemetering method(Hart Check 108 System). Oxygen uptake in percent of maximal oxygen uptake(% of VO₂max) of the actual rowing was calculated from the equation of relationship between heart rate and oxygen uptake obtained during exhaustive running test on the treadmill. Heart rates during the exercise of actual rowing was measured on 8 male and 4 female Korean national rowers. Blood lactate concentration measurements were used autoclix Lancet Method after actual rowing exercise for 8 male rowers. Also, eleven male rowers and six female rowers volunteered as subjects in this study. The results obtained are summarized as follows. 1. The means for the percent fat of the Korean national male and female rowers were 12.1±1.09% and 18.4±3.50, respectively. 2. The means for Health-Carter somatotype of the Korean national male and female rowers were 2.8-4.5-2.9 of balanced mesomorph and 4.2-3.4-2.9 of mesoendomorph, respectively. 3. The means for the maximal oxygen uptake(VO₂max) of the Korean national male and female rowers were 5.30±0.607ℓ/min(65.6㎖/㎏/min) and 3.22±0.148ℓ/min(48.1㎖/㎏/min), respectively. 4. The means for the heart rate of national male and female rowers by actual rowing exercise were 171.3±10.44bpm ad 172.9±8.35bpm, respectively. 5. The means for the heart rate in percent of maximal heart rate(%VO₂max) of national male and female rowers by actual rowing exercise were 88.6±8.12% HRmax(81.7±11.12%VO₂max) and 88.2±5.38%HRmax(88.8±5.77%VO₂max), respectively. 6. The means for the RMR(Mets) of national male and female rowers by actual rowing exercise were 17.2±2.59RMR(15.4±2.12Mets) and 13.5±1.95RMR(12.2±1.44Mets), respectively. 7. The means for the pitch rate of national male and female rowers by actual rowing exercise were 31∼33 stroke/min and 29∼31 stroke/min, respectively. 8. In actual 2,000m rowing exercise, blood lactate concentration was 6.74±0.854mM/ℓ on goal in-point and 7.07±0.989mM/ℓ on 5 minutes after recovery in male rowers.

成人男子의 體組成, 體型 및 PWC 에 관한 考察

李相于,辛尙根,朴哲浩 東亞大學校附設스포츠科學硏究所 1990 스포츠科學硏究論文集 Vol.8 No.-

The purpose of this study was focused on the characteristic of body composition, somatotype and ?? for Korean adult males. Subjects were 7 adult males, aged 31 to 36 years (mean age ; 34.4Yrs). The items in physique were body height and weight. Body density was estimated from the sum of two skinfold using the regressional equations suggested by Nagamine et al.(1972). Percent fat was calculated by Brozek et al.(1963) formular. Somatotype was calculated by Health-Carter(1981) anthropometric method. Monark frictional bicycle ergometer was used to measure heart rate responses to ?? test. The mixed progressive loading method was adopted for bicycle ergometer. The following results of the measurement were obtained. 1. The mean for the percent fat of Korean adult males was 19.8±9.58%. 2. The mean for the Health-Carter somatotype of Korean adult males was 5.1-6.2-1.5 of endo-mesomorph. 3. The mean for the ?? of Korean adult males was 664.3±120.99kpm/min. 4. Correlation coefficients between ?? versus %fat, LBM per Height and endomorphic component were -0.49, -0.49, -0.50, respectively. 5. Correlation coefficients between ?? Versus LBM and LBM per Height were 0.45, 0.54, respectively. 6. Colleration coefficients between ?? versus mesomorphic component and ectomorphic component were -0.19, 0.26, respectively.

곡률을 갖는 복합적층쉘의 에너지 흡수특성 및 충격손상

황재중,이철우,김영남,심재기,양인영 朝鮮大學校 機械技術硏究所 2003 機械技術硏究 Vol.6 No.1

본 연구에서는 CFRP 복합재 적층쉘 형상의 구조부재 설계 시 고려해야 할 고강성, 고강도 측면을 중점으로 2개의 계면수를 갖는 직교이방성 CFRP 복합재 적층쉘에 대하여 횡방향 하중 정적실험 및 ANSYS를 이용한 유한요소해석을 행하여 직교이방성 적층쉘의 역학적 특성을 실험 및 유한해석을 통하여 고찰하고자 한다. 또한, 곡률의 크기에 따른 CFRP 적층쉘의 충격특성을 정량적으로 평가하기 위하여 충격속도의 크기에 따른 에너지 흡수특성 및 충격손상기구를 규명하고자 한다. 정적실험의 경우보다 FEM해석의 경우가 약 25%∼35% 정도 높게 나타났고 충격에너지가 증가할수록 박리현상은 선형적으로 증가하였으며, 같은 충격에너지 범위라 할지라도 곡률 반경이 증가할수록 흡수에너지는 증가하였다. Centering on high rigidity and intensity 'to be considered in the design of sub-materials of the perpendicular anisotropic CFRP composite material laminate shells with two interlaminar number, this study performed width-direction load static experiments and the finite element method using the ANSYS to examine dynamic properties of perpendicular anisotropic laminate shells. Also, to evaluate the impact property of the CFRP laminate shell according to size of curvature quantitatively, it was to identify energy absorption and impact damage instruments according to size of impact speed. Absorption energy of the .FEM analysis was about 25-35% higher than that of the static experiment and the more impact energy increased, the more damage area increased linearly. Despite of the same impact energy range, the more curvature radius increased, the mere absorption energy.

몇가지 植物의 棲息地 造成에 關한 硏究

윤종선,김익환,신세균,심우경,이철희,신영철 韓國植物ㆍ人間ㆍ環境學會 1999 인간식물환경학회지 Vol.2 No.2

종의 棲息密度가 낮아지고 있는 하늘나리, 섬초롱, 자란 3종의 식물을 인위적으로 棲息地를 造成하기 위하여 국립공원 속리산 등산로변 標高 200m, 400m, 600m 지점에 150주식 종당 450주를 조직배양 및 분주에 의하여 육묘 된 묘를 이식하여 생존상태 및 棲息地 造成의 가능성을 2년에 걸쳐 검토한 결과는 다음과 같다. 1. 造成 棲息地의 토양의 理化學的 造成은 pH 5.2∼5.6, 유기물 함량 29∼54g/㎏, CEC 9.4∼11.5㎝ mol(+)/㎏으로 산성을 띠고 있었으며, 유기물 함량은 높은 편이었고, 염기치환용량은 낮았으나 비교적 우리나라 典型的 山地土壤의 理化學的 造成과 유사하였다. 2. 棲息地內 생장기간의 投光率은 標高 200m 지역은 10.8∼11.6%, 400m lw역은 10.8∼11.4%, 600m 지역은 11.0∼12.8%로 식재식물의 生長環境에 부족한 상태였다. 3. 식재 식물 수는 식재 후 활착율은 3종 모두 양호하였으나, 점차 감소되었으며, 특히 자란의 감소율이 높았다. 감소의 원인을 분석한 결과 하늘나리, 섬초롱, 자란 모두 굴취나 절취의 피해가 많았으며, 특히 자란은 凍害에 의한 枯死가 1년차 72∼86주, 2년 차에서 19∼35주로 조사도어 자연상태에서의 越冬은 어려운 것으로 나타났으며, 집중호우에 의한 流失도 감소의 한 원인이었다. 4. 식재식물의 생장상태는 불량하였는데 이는 投光量 부족으로 판단되어 棲息地造成時에는 錄陰期 投光量에 대한 사전 검토가 중요한 요인으로 나타났다. 5. 개화율은 섬초롱과 자란에서 높았으며 標高가 높을수록 개화기는 2∼4일 늦어지고 휴면기는 빨라지는 경향이었다. 식물 棲息地 造成時에는 造成 식물의 생장에 적합한 토양, 光環境 등을 고려한 위치 선정이 중요하며, 上層林에 의한 遮光으로 下層 초본식물 遷移速度가 빨라짐으로써 光環境 개선을 위한 上層林의 間伐, 周邊樹種의 更新이 요구된다. In order to make the artificial habitats of Lillium concolor, Campanula takesimana and Bletilla striata that the number of plant became sparse, 150 plants per species were transplanted at the region of 200m, 400m and 600m above sea level. And the growth of plants and the potential as habitats creation were analyzed. In the physical and chemical properties of soils in the there, soil pH was 5.2 to 5.6, organic matter content was 29 to 54g/㎏ and cation exchange capacity(CEC) was 9.4 to 11.5㎝ mol(+)/㎏. The transmittance rates of sunlight of the habitats during the growing periods were 10.8 to 11.6% in the 200m region, 10.8 to 11.4% in the 400m region and 11.0 to 12.8% in the 600m region. These transmittance rates were deficient for normal growth of plants. After the plants were transplanted, the survival rates of three species were high in common but the rates decreased gradually. Especially the decrease rate was high in the Bletilla striata. The causes of decrease were digging and cutting by climbers, sweeping asay by rainfall and freezing damage. Especially, the cold tolerance of Bletilla striata was weak in the natural condition. The growth of planted plants was poor, and it was assumed that the reason was shortage of sunlight transmittance. The flowering rates were high in the Campanula takesimana and Bletilla striata. And as the elevations were high, the flowering was later by 2 to 5 days but the dormancy was earlier. In the artificial making of plant habitats, the growth environment of plants have to be considered to choose the suitable region. And, because the habitats are shaded by the trees and bushes, the thinning of trees and the change of species are needs to improve the light transmission.

160kV 3극 고전압 전원 장치

정우철(Woo-Choel Jeong),이윤석(Yoon-Seok Lee),박장훈(Jang-Hoon Park),류홍제(Hong-Je Ryoo) 전력전자학회 2023 전력전자학술대회 논문집 Vol.2023 No.12

HFC/CATV 전송망용 비슬롯형 확률전송 CSMA/CD 매체제어접근 방식의 구현에 관한 연구

우상철 ( Sang-choel Woo ) 한국고등직업교육학회 2009 한국고등직업교육학회논문집 Vol.10 No.1

본 논문에서는 초고속 통신망의 한 대안으로 떠오르고 있는 HFC/CATV 전송망을 기초로 한 새로운 CSMA-CD/U/ P _i(unslotted P _i-persistent CSMA-CD) MAC 프로토콜을 제안하고 각 기능부를 VHDL을 사용하여 구현한다. HFC/CATV 전송망은 Upstream Channel에서 단말의 위치에 따라 우선적인 접속 특성을 가지는데, 이런 문제점을 해결하기 위하여 전송할 데이터 패킷이 발생하더라도 그 즉시 전송하지 않고 확률적으로 전송하는 새로운 MAC프로토콜을 제안하고 구현한다. 제안방식은 HFC망에서 접속된 단말의 개수M=5로 하여 시뮬레이션한 경우 시간이 지남에 따라 전송 확률 값이 점차 수렴하여 안정적인 특성을 가진다.

폐석탄회를 이용한 고성능 숏크리트의 염소이온 침투 저항성 평가

박철우(Park, Choel-Woo),심종성(Sim, Jong-Sung),강태성(Kang, Tae-Sung),박성은(Park, Sung-Eun),이현기(Lee, Hyeon-Gi) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.1

Resently, Underground and tunnel works shotcrete is getting widely applied especially for a large scale project. With incresed significance of durability of concrete structure, intensive studies on numerical analysis for deterioration of the concrete structure due to the chloride attack have been carried out. Thus, this study aims to find an optimum mix proportions for low permeability shotcrete using industrial by-product from power plants. Chloride ion penetration resistance test with fly-ash and silica fume performed to determined the high durability and low permeability mix proportions.

USN과 연동 가능한 한국형 디지털 TRS(TETRA) 무선 모뎀 및 게이트웨이 시스템 개발

우상철 ( Sang-choel Woo ) 한국고등직업교육학회 2013 한국고등직업교육학회논문집 Vol.14 No.2

In this study, we realized the digital TETRA(Terrestial Trunked Radio) Modem and Gateway based upon the USN Network. Also, the digital TETRA Modem and Terminal is made of the SSPD(Single Slot Packet Data) method and MSPD(Multi Slot Packet Data) method that has the function of PEI, DMO, UMAC and MLE. The H/W design of digital TETRA Modem and Terminal has RF transmitter/receiver part ,baseband part, DSP subsystem, OMAP5910 MCU subsystem, 25KHz RF channel bandwidth and the S/W design has TETRA Protocol Stack Layer 1, TETRA Protocol Stack Layer 2(LLC and MAC), TETRA Protocol Stack Layer 3(MLE). USN Part is realized by using the new manager part and agent part and is suggested the new data frame.

폐석탄회를 이용한 고성능 숏크리트의 염소이온 침투 저항성 평가

박철우 ( Park Choel-woo ),심종성 ( Sim Jong-sung ),강태성 ( Kang Tae-sung ),박성은 ( Park Sung-eun ),이현기 ( Lee Hyeon-gi ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1

Resently, Underground and tunnel works shotcrete is getting widely applied especially for a large scale project. With incresed significance of durability of concrete structure, intensive studies on numerical analysis for deterioration of the concrete structure due to the chloride attack have been carried out. Thus, this study aims to find an optimum mix proportions for low permeability shotcrete using industrial by-product from power plants. Chloride ion penetration resistance test with fly-ash and silica fume performed to determined the high durability and low permeability mix proportions.

Serum and Urine Soluble HLA Class 1 Antigen Concentrations are Increased in Patients with Hemorrhagic Fever with Renal Syndrome

( Choel Whee Park ),( Sung No Yun ),( Chul Woo Yang ),( Tai Gyu Kim ),( Hoon Han ),( Euy Jin Choi ),( Yoon Sik Chang ),( Byung Kee Bang ) 대한내과학회 1997 The Korean Journal of Internal Medicine Vol.12 No.1