Maximal Oxygen Uptake and Running Efficiency in Distance Running Performance of Highly Trained Collegiate Runners

김기봉 慶星大學校 1988 論文集 Vol.9 No.1

本 硏究는 高度로 訓練된 大學長距離選手들의 競技成績에 있어서 最大酸素攝取量과 走行效率性의 重要度에 對한 相關 關係를 分析하였으며, 本 硏究에서 밝혀진 結果는 最大酸素攝取能力과 10,000meter競技의 走行 pace와의 相關關係는 (r=0.13) 높은 VO₂max의 有酸素能力을 가지고 있는 同質 集團에서는 높은 有意性이 없으며, 走行效率性과 競技成績과는 매우 有意한 相關關係를 나타내었다. (r=0.75) The purpose of this study was to examine the contribution of maximal oxygen uptake and running efficiency in highly trained male collegiate runners to their performance in a 10, 000meter race. The ten selected subjects were collegiate male long distance runners who have attended at the University of South Carolina, U.S.A. Treadmill running was utilized for the laboratory measurement of maximal and submaximal oxygen consumption because it provides a valid picture of the physiological responses which accompany track running. Maximal oxygen uptake was determined using a continuous protocol. Treadmill speed was kept at 8mile/hr(214.4m/min) for all stages. Subjects completed a three minutes warming up at level grade. Grade was then increased 2¹/₂percent for each subsequent two minutes until the subject reached exhaustion. A correlation analysis was used to determine if a significant relationship existed between distance running performance and maximal oxygen uptake and running efficiency. Relationships were analyzed for singificance at the five percent level of confidence. The results of this research indicated that the relationship between maximal aerobic capacity and running pace for the 10,000 meter race(r=0.13) was not significant at the five percent level of confidence. This does not argue against the importance of a high VO₂max for success in distance running performance because all the subjects possessed very high maximal aerobic power. Rather, the data suggest that among subjects with equally high VO₂ max's aerobic capacity is not a determining factor for competitive sucess. The relationship between running efficiency(VO₂) at the mean race pace of 214-10.0/min and performance in the 10,000meter races(r=0.75) was significant at the one percent level of confidence. It was concluded that of the factors studied in this study the significant factor determining competitive success in the 10,000 meter run for highly trained collegiate male distance runners was their running efficiency and not their maximal aerobic capacties.

갈근과 두시 복합추출물의 아토피피부염 유발 백서에서의 피부장벽 손상 회복 효과

김기봉,김기봉,안상현 대한한방소아과학회 2025 대한한방소아과학회지 Vol.39 No.3

Objective This study aimed to evaluate the effect of a combined extract of Puerariae Radix (葛根) and fermented soybean (Douchi, 豆豉) on the recovery of skin barrier damage in atopic dermatitis (AD). Methods AD was induced in four-week-old NC/Nga mice, after which the combined extract of Puerariae Radix and Douchi was administered. To assess the skin barrier recovery through the generation of moisturizing factors, ceramide kinase and Caspase 14 were observed. To evaluate antimicrobial barrier recovery, Na⁺/H⁺ exchanger (NHE) and cathelicidin were examined. Cclaudin and Toll-like receptor 2 (TLR-2) were analyzed to assess tight junction recovery. Results Positive expression of ceramide kinase was higher in the Puerariae Radix and Douchi complex extract administration group after lipid barrier elimination (PDET) than in the lipid barrier eliminated group (LBE) and ceramide exposure group after lipid barrier elimination (CERT); caspase 14 expression showed less reduction in the PDET group. NHE expression was reduced to a lesser extent in the PDET group than that in the LBE and CERT groups, whereas cathelicidin expression was more increased in the PDET group. Claudin expression was also higher in the PDET group than in the LBE and CERT groups, and TLR-2 expression was significantly more increased in the PDET group. Conclusion The combined extract of Puerariae Radix and Douchi has the potential to restore skin barrier damage in atopic dermatitis.

프랑스 상징주의 시론(1)

김기봉 한국불어불문학회 1981 불어불문학연구 Vol.16 No.1

말라르메의 본질(本質)

김기봉 한국불어불문학회 1966 佛語佛文學硏究 Vol.1 No.1

발제 2 : 포스트모던 역사이론 -'무기의 비판'인가 '비판의 무기'인가

김기봉 역사비평사 2001 역사비평 Vol.- No.56

국방 클라우드컴퓨팅의 효과적 추진에 관한 탐색적 연구

김기봉,김필성,정호석,신용태 한국IT정책경영학회 2020 한국IT정책경영학회 논문지 Vol.12 No.6

In order to win the war of the future, building a Cloud Computing that allows soldiers on a mission to easily access anytime, anywhere is key. The Ministry of National Defense is pursuing Defense Informatization, such as the establishment of an Defense Integrated Data Center, but the provision of Cloud Computing services is still limited. Therefore, this paper examines the propensity to promote Defense Cloud Computing in developed countries abroad, and suggests effective ways to promote Defense Cloud Computing.

‘쇼아 ’ 이후에도 ‘인생은 아름다워’

김기봉 문화사학회 2001 역사와 문화 Vol.4 No.-

지진 하중을 받고 있는 회전축-베어링 시스템의 동적 거동에 관한 연구

김기봉,김양한 대한기계학회 1988 대한기계학회논문집 Vol.12 No.5

본 연구에서는 Monte Carlo 새뮬레이션 기법을 이용하여 지반가속도의 스펙트 럼 밀도함수(power spectral densities)로부터 여섯 성분의 지반가속도 시간이력곡선 을 얻고, 이들을 입력 데이터로 하여 운동방정식에 Newmark의 직접적분법을 이용하여 회전축-베어링 시스템의 응답상태벡터(response state vector)를 얻기로 한다. 충분 히 많은 수의 지반가속도 시간이력곡선을 시뮬레이션하고, 각 경우에 대응하는 응답상 태벡터들을 얻은 다음 일반적인 통계학 방법을 적용하여 평균함수, 표준편차 및 r.m.s (root mean square)등을 얻는다. The dynamic response of rotor-bearing systems subjected to six-component nonststionary earthquake ground accelerations is analyzed. The governing equations of motion for the rotor are derived using Lagrangian approach. The six-component earthquake inputs result in both inhomogeneous and parametric excitations, so that the conventional spectral analysis of random vibration is not applicable. The method of Monte Carlo simulation is utilized to simulate the six-component nonstationary earthquake ground motions and to determine the response statistics of rotor-bearing systems. The significant influences due to rotational motions of seismic base on the overall structural response is demonstrated by a numerical example.

筋纖維의 特性이 SPORTS 成績에 미치는 影響

金基鳳 경성대학교 1983 부산수산대학 논문집 Vol.4 No.2

There are two very important factors to be elite athletes. They are inborn factors and environmental factors. This paper is only focused upon human skeletal muscle fibers. There are two different types in human skeletal muscle fibers. Two types of muscle fibers can be classified by their contractile and metabolic characteristics ; (1) Fast-twitch muscle fibers, in which energy is generated anaerobically and rapidly for a quick, powerful contraction, and (2) Slow-twitch muscle fibers that contract relatively slowly and generate energy for ATP synthesis predominantly via aerobic metabolism. Percentage distribution of fiber type differs significantly among people and between various muscle groups of a particular person. This distribution is probably determined by genetic code and can not be change to any large extent by physical training. However, both types of fibers can be makedly improved in work capacity and metabolic capacity by specific endurance and power training. Thus consequently, there seem to be some inborn factors that predispose certain individuals to have greater adaptations to training than others. It is no dout that environmental factors are greatly important for elite athletes, but the genetical factors should be firstly taken into account. However, a person's fiber composition is clearly not the sole determinant of performance as several researchers have shown that for a particular group, either trained or untrained, knowledge of a person's predominant fiber type is of limited value in predicting the outcome of specific exercse performance. This is not surprising because performance capacity is the end result of the blending of many physiological, biochemical, neurologic, and biomechanical components and is not simply form a single factor such as muscle fiber type.

수배관 절환 방식 수열 히트펌프의 난방 운전 특성에 대한 실험적 연구

김기봉,장기창,왕은석,나호상,조준현,최봉수,허재혁,이길봉 대한기계학회 2023 大韓機械學會論文集B Vol.47 No.2

The present study conducted experiment on heating and reverse-cycle operation using a low-temperature heat source. A 20 kW scale water switchable experimental device is built to develop a river water heat pump system with a heat source mix technology that can provide cooling and heating energy irrespective of the temperature characteristics of the heat source. Even at 4°C and 4.5°C, the river water heat pump demonstrates good efficiency, with COPh values of 3.05 and 3.15, respectively. The reverse-cycle operation experiment is conducted using three different methods, switching the water side valve momentarily each time the evaporator's water output temperature reaches -1°C. In the reverse-cycle operation, the inlet and outlet temperatures of the evaporator circulating water are compensated to prevent supercooling of the plate. An optimal operation control pattern to prevent supercooling is determined to be possible through reverse-cycle operation. 본 연구에서는 저온 열원 활용을 위한 난방 및 역사이클 운전에 대한 연구를 실험적으로 수행하였다. 열원의 온도 특성에 상관없이 냉·난방 에너지를 공급할 수 있는 열원 믹스 기술을 적용한 하천수 히트펌프 시스템 개발을 위해 20 kW 규모의 수절환이 가능한 실험 장치를 구축하였다. 하천수 히트펌프는 저온 열원인 4°C, 4.5°C에서도 COPh가 각각 3.05, 3.15로 좋은 효율을 보였다. 저온 열원 활용을 위한 운전 전략 중 역사이클 운전은 증발기의 물 출구 온도가 -1°C에 도달하면, 물 측 밸브를 순간적으로 절환하는 역사이클 운전 실험을 3가지 방법으로 진행하였다. 역사이클 운전은 증발기 순환수의 입·출구 온도가 보상되어 전열판의 과냉각을 방지하는 최적의 운전 제어 패턴이 가능할 것으로 판단된다.