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지구성 운동 시 운동자각도 및 피로물질에 미치는 L-arginine의 효과
이천호(Lee Cheon-Ho),최성근(Choi Sung-Keun),정승삼(Joung Seung-Sam),최승욱(Choi Seung-Wook) 한국체육과학회 2010 한국체육과학회지 Vol.19 No.1
The purpose of this study was to investigate the effect of administration of L-arginine on rating of perceived exertion and fatigue material during endurance exercise. Methods : The subjects of this study were six elite swimmer. All six swimmer were performed to do cycle ergometer exercise in the laboratory and it has been measured repetitively in 6 weeks of interval. Each experimental exercise were monitored and analyzed the change of fatigue material. Rating of perceived exertion decreased significantly in L-arginine administration group than in placebo group at 50 min and 60min(p<.05). The amount of lactate concentration decreased significantly in L-arginine administration group than in placebo group at 45min and 60min(p<.05). The amount of ammonia concentration decreased significantly in L-arginine administration group than in placebo group each time blood sample was collected(p<.05). therefore, These results show that L-arginine administration could increase exercise performance and decrease fatigue material in endurance exercise.
VO₂max로 본 수영선수의 저 수온 환경적응에 관한 연구
이천호(Lee Cheon-Ho),최승욱(Choi Seung-Wook),김현경(Kim Hyun-Kyung) 한국체육과학회 2003 한국체육과학회지 Vol.12 No.2
??The temperature of the body is determined by the temperature of the water, the swimming speed and the percentage of the subcutaneous fat. For this specific experiment, we asked the testee bring out the maximum exercise of their own and as a result, the load swimming speed and the percentage of the subcutaneous fat remained constant. Therefore the main factor that determines the temperature of the body is the temperature of the water. So to speak, the temperature of the body for the testee group and the controller group went down as the temperature of the water went to 33℃~23℃.<br/> ??As the temperature of the water went down, it slowed down the muscular movement and decreased the consumption of air below to the maximum. The skin, however, deemed to prevent the lowering of the temperature of the body. As a result of this experiment, it is assumed that the primary factors for the changes in VO₂nax were caused by the coordination of breathing, circulation, and the muscles.
변동비반영 발전경쟁시장에서 LNG-복합 화력발전소의 경제성 분석에 관한 연구
李天豪(Cheon-Ho Lee),韓錫萬(Seok-Man Han),鄭求亨(Koo-Hyung Chung),姜東周(Dong-Ju Kang),金發鎬(Balho H. Kim) 대한전기학회 2008 전기학회논문지 Vol.57 No.8
Since Cost Based Pool markets has been continued to power markets, Genco. needs economic analysis about investment in power plants. Particularly most Private Genco.s have presently a construction plan about LNG combined cycle thermal power plants. In this paper, we propose a economic analysis method of LNG combined cycle thermal power plants using Economic Dispatch and Optimal Power Flow in CBP markets. Also we develope computation model using it for decision making to build a plant. This method can consider a variation of power facility like power plants and transmission lines in CBP markets. Finally, this dissertation provides a relevant case study to confirm the effect of cost factor to economical efficiency.
이천호(Cheonho Lee),김남형(Namhyung Kim),임종훈(Jonghun Lim) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
The pre-treatment and the full-dipping-electro painting of the OEM painting process is not possible for the repair painting . In this situation, there are two opposite opinions on the washprimer as the substitute for the pre-treatment and full-dipping-electro painting of the OEM. The first one is that the washprimer for the repair painting needs to be used as the substitute. The other one is that the washprimer doesn’t have to be used because it doesn’t have considerable improvement on the anti-corrosion effect. So, this study has tried to verify the anti-corrosion effectiveness of the washprimer based on the technical data through the thickness test, the salt spray test and the adhesion test. As a test result, comparing the specimen with the washprimer to the one without washprimer, there has been no difference between two cases. That is, both specimens have had no corrosion, no inflation and no separation. Based on the test result, we can conclude that the washprimer doesn’t have considerable improvement on the anti-corrosion effect and the expected anti-corrosion effect can be obtained with only the surfacer material.
스쿼시 동호인들의 운동중독이 근 손상 생물표지인자에 미치는 영향
박석,이천호,이영준,김정석,유영준,정윤철,조영웅,이상규,홍인숙,김동아 한국웰니스학회 2012 한국웰니스학회지 Vol.7 No.1
The purpose of the study was to examine the influence of exercise addiction on??muscle injury markers in squash club members. In order to achieve this purpose, a questionnaire survey was??conducted with 217 squash club members residing in Seoul and Kyonggi. Exercise addiction participants were??divided into 3 groups, that is, non-addicted, over-use, and addicted group by the exercise addiction scales. In this??study, heat shock protein 70, creatine kinase and lactate dehydrogenase were measured to confirm the level of??muscle injury. There was significant difference in heat shock protein 70, creatine kinase and lactate??dehydrogenase between exercise addiction levels(p<0.05). The results represent that muscle injury is more affected by??high level of exercise addiction. In summary, these results suggest that muscle injury markers (heat shock??protein 70, creatine kinase and lactate dehydrogenase) might increase as the exercise addiction level increases.
정진도,이천호 한국환경과학회 2003 한국환경과학회지 Vol.12 No.12
This study was compared each ingredient's local/seasonal change characteristics by analyzing anions and cations, watersoluble ionic components, from the precipitation of Dangjin and Anmyeon-do areas. The samples were collected for 8 months from both spots between the period of April 1, 2002 to November 31, 2002. The precipitation samples were collected continuously through the entire duration of precipitation by using the wet-only automatic samplers. When rain continues to fall over 24 hours or occasionally, we considered those collected from 9 o'clock in the morning for 24 hours as the day's samples. As a method to verify for the reliability of the analyzed data is concerned, we use the ion balance method and the electricity conductance method, was used widely as a way of watching the atmosphere by the WMO (World Meteorological Organization)/GAW (Global Atmosphere Watch). Also, Dangjin and Anmyun-do area confirmed that contains artificial pollutants by analysis of ion concentration data.
정진도,이천호 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.5
In this study, we are going to compare the chemical composition of the precipitation that falls in the Dangjin and Anmyon-do areas by analyzing the water soluble components (anion and cation). We also examined the effects of seasonal change and regional difference in those data sets. The [NO₃^- + SO₄^(2-)] at 49.2μeq/l is 67% of the total anion of 73.1μeq/l, while that of [NH₄^+ + Ca^(2+)] at 37.7μeq/l is 62% of the cation in Dangjin area. Also, the [NO^₃- + SO^(2-)₄] concentration of 151.8 (μeq/l) is 62% for the total anion of 143.5 (μeq/l), and the [NH^(4+) + Ca^(2+)] concentration of 119.7 (μeq/l) is 47% for the cation of 254.3 (μeq/l) in Anmyon-do area. The ion composition ratio is shown for the order by 22% of SO^(2-)₄, 20.8% of NH^(+)₄ and 15.4% of Cl^(-) that is the sum of 58.7% for the total ion composition in Dangjin area, and is the order by 33.8% of NH^(4+), 16.3% of SO^(2-)₄ and 11.1 % of Cl^(-) in Anmyon-do area. Furthermore, We predicted that even areas which were previously clean will get acid rain if there is large scale construction there or nearby.