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장거리 고교 육상경기 선수의 생리적 특성 및 단 중 장거리 기록과 5,000M 기록의 비교부석 연구
김성수,공응대,오창석,오인환 고려대학교 스포츠과학연구소 1994 스포츠科學論叢 Vol.6 No.1
The purpose of this study was to analyze the contribution of anthropometrical physiological characteristics underlying 5000 meter running performance in high school male distance runners. It has been pointed out that a number of anthropometrical and physical attributes such as body size, body composition, running economy, pulmonary function, cardiovascular-respiratory function and running history as well as maximal oxygen consumption have relatively association with success in the long distance running performance. Based on the statistical analysis, significant difference (p$lt;0.05) was found between high group runners and low group runners. Enclosed is a summary of the lab test result, field test result. 1. The significant factor determining competitive success in the 5000 meter run for high school male long distance runners were their maximal oxygen consumption and the level of Lactate acid.(r=0.87, r=0.86) 2. The relationship between height and weight 5,000 meter running performance was not significant for high group and low group. (r=0.37, r=0.49) 3. There was no significant relationship between body fat % and body composition and 5,000 meter performance for both. It was concluded that the significant factor determining competitive success in 5,000 meter run was the speed ability in short distance run as well as endurance ability. Further attempt of evaluating th relationship between the speed ability in short run and long distance performance should be made more extensively.
金錫煥,成東鎭,金陽洙 韓國體育大學校附屬 體育科學硏究所 1990 韓國體育大學校附屬 體育科學硏究所論文集 Vol.9 No.1
The purpose of this study was to investigate effect of maximal exercise on the physiological changes in pulmonary function in smoker and non-smoker. Pulmonary function was tested with spirometer by forced vital capacity maneuver and maximal voluntary ventilation maneuver on the rest state and after maximal exercise. Subjects paticipated for this experiment was 23 smoker and 18 non-smoker athletes. The result of this study was as follows: 1. FVC, FEV??, FEV?? and MVV in the non-smoker showed higher slightly than that of smoker. 2. After maximal exercise, IRV was decreased significantly but tidal volume was increased significantly different(P<0.01) from rest. 3. After maximal exercise, ERV was increased slightly but forced vital capacity was decreased a little. 4. FEV??, and FEV?? improved significantly in the non-smokers, but FEV?? was improved after maximal exercise in the smokers. 5. MVV was improved 2.6% in smokers and 6.2% in non-smokers after maximal exercise. So maximal exercise was able to improve the plumonary function and to reduce the airway resistance in smokers and non-smokers.
Kang, Suk-Ku,Kim, Jung-Hawn,Shin, Yaung-Chul Korean Chemical Society 1986 Bulletin of the Korean Chemical Society Vol.7 No.6
Stereochemical control of the Wittig reaction of the primary aldehyde, 8-acetoxyoctan-1-al (7) with the nonstabilized alkylide, triphenylphosphonium n-butylide (6), was achieved by controlling the reaction conditions including solvent, temperature and inorganic salts. These conditions can be applied to the direct sythesis of the mixture of (Z)-, and (E)-8-dodecen-1-yl acetate, the sex pheromone of the oriental fruit moth, Grapholitha molesta. The primary aldehyde, 8-acetoxyoctan-1-al (7) was synthesized from 1,8-octanediol which is cheap and readily available.
New Control Scheme of Lithium-Polymer Battery Units using Single Phase Multi-Level Converter
Jae-Hong Kim,Meong-Suk Kang,Seong-Bo Oh,Eel-Hawn Kim 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
This paper proposes a new control scheme of lithium-polymer battery units, based on single phase multi-level converter. In the DC/AC converter applications using battery storage system, it is necessary to control the balancing voltage of individual battery units for high efficiency utilization. Using the proposed control scheme, it is applied the DC/AC single phase converter system. To verify the effectiveness of the proposed control scheme, computer simulation and experimental work are accomplished. In the computer simulation, lithium-polymer battery units and single phase multi-level converter system are modeled and carried out using Psim simulation program. And also computer simulation and experimental results will be presented to support the discussions..
건강진단자에서 복부초음파검사상 나타난 공간점유간병소에 대한 임상적 고찰
김기윤(Ki Yun Kim),이헌주(Heon Ju Lee),서정일(Jeong Ill Suh),박찬원(Chan Won Back),이동준(Dong Jun Lee),송영두(Young Doo Song),도갑석(Gab Suk Doh),전경진(Kweong Jin Jeon),김준환(Jun Hawn Kim) 대한내과학회 1996 대한내과학회지 Vol.51 No.2
N/A Objectives: Ultrasonography(USG) is widely used for the screening and detection of liver SOL in pa- tients with acute and chronic hepatopathy, but the prevalence of liver SOL on a nonselected population by ultrasonographic screening examination is not well know. We experienced some patients with liver SOL in a automated med-screening center visitor by USG and reviewed the prevalence and clinical aspects of liver SOL detected by USG in a view of dynamic relation to hepatoma. Methods: Form March 1983 to April 1994, USG was performed on 27,140 visitors from a urban and suburban area of Taegu city. Initial USG of the liver was followed by follow up USG and other imaging modalities in case it was necessary. Results: 1) Liver SOL was detected in 337 cases(1.24%) of 27140 examinees by initial screening USG. 2) Among 337 cases of liver SOL 226(67.1%) of cyst, 19(5.7%) of hepatoma, 15(4.5%) of hemangioma, 12(3.6%) of polycystic kidney, 2(0.6%) of metastatic cancer, 1(0.3%) of abscess, 22(6.5%) of false positive finding without SOL and 40 cases(11.9%) of nonspecific questionable SOL without confirmation were noted at the end. 3) The sensitivity of USG detecting liver SOL was 93.5% and 100.0%, 93.3% and 94.7 in cyst, hemangioma and hepatoma respectively. False positivity of USG was 6.5%. 4) The incidence rate of hepatoma is presumed to be 8.1 and 3.5 per 100,000 in male nad female, respectively. Coclusion: The prevalence of liver SOL in general population by USG screening was presumed to be 1.24%. USG screening and follow up examination might be needed for the detection of benign and
X-선 회절에 의한 피로파면거동과 응력세기계수 예측에 관한 연구
임만배(Man-Bae Lim),부명환(Myung-Hawn Boo),조충형(Chung-Hyung Joh),김영석(Young-Suk Kim) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.3
This study investigated the effect of stress intensity factor ranges, or ΔK=Kmax-Kmin on residual stress for SG365 steel. The fatigue crack growth rates of the SG365 steels were determined at RT and 300℃ on the compact tension specimen under the ratio of Pmax and Pmin set at 0.1 and 0.5, respectively. To correlate ΔK and residual stress and the FWHM are measured on the fractured surface of the CT specimens using diffraction lines {211} determined by an X-ray residual stress tester. The Residual stress had no clear trend with ΔK but the FWHM had a nice linear relationship with ΔK. Based on the these results, the predictability of ΔK is discussed as a function of the FWHM and residual stress, if any, determined by X-ray diffraction lines.
장기간의 임상 경과중 대량의 하부 장관 출혈을 일으킨 아메바성 대장염
윤용범(Yong Bum Yoon),송인성(In Sung Song),최규완(Kyoo Wan Choi),김정룡(Chung Yong Kim),이효석(Hyo Suk Lee),정현채(Hyun Chae Jung),이진호(Jin Ho Lee),유권(Kwon Yoo),노임환(Im Hawn Roe),정숙향(Suk Hyang Jung) 대한소화기학회 1989 대한소화기학회지 Vol.21 No.3
We report a case of atypical form of amebic colitis causing massive lower intestinal bleeding. Recurrent hematochezia lasting for more than 20 years and recent massive rectal bleeding were unusual manifestations of amebic colitis. The macroscopic finding of amebic colitis of the patient at sigmoidoscopy was not diagnositic and led to the patients receiving the therapy with steroid enema. Only sigmoidoscopic biopsies established the diagnosis and appropriate treatment with metronidazole resulted in complete resolution of the hematochezia during 6 months of follow-up.
허윤(Yoon Huh),조군제(Goon Jae Cho),박상희(Sang Hee Park),김장섭(Jang Sup Kim),김시환(Si Hawn Kim),양웅석(Oong Suk Yang) 대한소화기학회 1983 대한소화기학회지 Vol.15 No.1
N/A The authors evaluated the diagnostic accuracy of ultra sonography in the differential diagnosis of jaundice in 63 cases who were confirmed byoperation and other diagnostic methods from Jan. to Aug 1982 at the department of internal rnedicine in Busan National University Hospital. Of 63 cases of jaundice, on ultrasonographic examination biliary obstruction was 36, and non-obstruction of bile duct was 27 according to the degree of bile duct dilatation(common bile duct 6mm, intrahepatic bile duct>4 mm). The sensitivity of ultrasonography in the diagnosis of biliary obstruction was 92% and specificity was 92,%, therefore overall accuracy of ultrasonography in the differential diagnosis of jaundice was 92%. In the detection of the exact caseses of jaundice the diagnostic accuracy of ultrasonography was 54% in obstructive jaundice, 38% in non-obstructive jaundice. So ultrasonographic examination appears to be a simple, reproducible, and high accurable screening method in the differentical diagnesis of jaundice although relatively low valuable in the diagnosis of exact causes of jaundice.