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광산폐기물 적치사면의 불포화 특성변화 모니터링 시스템 구축
송영석(Young-Suk Song),정인근(In-Keun Jung) 한국지반신소재학회 2016 한국지반신소재학회 논문집 Vol.15 No.3
본 연구에서는 부산 임기광산 광산폐기물 사면을 대상으로 강우 침투에 따른 지반내 불포화 특성변화를 살펴보기 위하여 불포화토 특성변화 측정유닛 및 시스템을 현장에 설치하였다. 불포화토 특성변화 측정시스템은 각종 측정유닛으로부터 측정된 자료를 저장, 관리 및 전달하는 시스템으로 Data Acquisition System(DAS), Solar System 및 불포화토 특성변화 측정유닛으로 구성되어 있다. 현장에 설치된 각종 측정유닛으로부터 측정된 강우, 체적함수비, 모관흡수력 등의 자료를 정리하여 분석하였다. 이들 결과를 살펴보면 강우시 체적함수비와 모관흡수력의 변화는 강우강도에 의해 크게 영향을 받으며, 강우시와 건기시 지표면 부근에서 가장 크게 증가하였다가 감소하는 것으로 나타났다. 그리고 현장에서 측정된 모관흡수력은 5-35kPa, 체적함 수비는 0.12-0.24 범위에 존재하는 것으로 나타났다. 그러나 지하수위는 강우발생 직후 바로 증가하는 것이 아니라 2-3일의 시간이 경과한 뒤 증가함을 알 수 있다. Field measurement units and a system were constructed and installed in a waste-dump slope at the Imgi mine to investigate and analyze the variations in the unsaturated characteristics of the soil. The field instrumentation system was composed of a data acquisition system (DAS), a solar system, and measuring sensors. The rainfall, matric suction, and volumetric water contents were continuously measured from the units in the instrumented site. The variations in matric suction and volumetric water content were primarily affected by the rainfall intensity. At the surface of the slope, the largest increase and decrease in the changes in matric suction and volumetric water content were observed during the wetting and drying processes, respectively. Also, the matric suction and volumetric water content were 5‑35 kPa and 0.12‑0.24, respectively. However, the ground water level was not suddenly increased just after rainfall but gradually increased after 2 or 3 days later.
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박원화(Park Won-Hwa),정인근(Jung In-Keun) 한국체육과학회 2006 한국체육과학회지 Vol.15 No.1
The purpose of this study was to investigate the effects of Gymnastics Competitive State on the Stress Hormone responses. The subjects for this study were seven Gymnastics players university students who participated in a national Gymnastics tournament. The subjects were composed to one groups: control exercise group(N=7), resistive exercise group(N=7), and control group(N=7). The subjects in the exercise performed 60min in about, four times a week at the intensity of 60~80% HRmax. The subjects in resistive exercise performed three circuits using a work-to-rest ratio of 30s : 30s three times a week on non-consecutive days at 40% of one-repetition maximum. Statistical techniques for data analysis were One-way ANOVA training times(pre, 12 weeks) and repeated measure ANOVA to determine the differences among groups. The 5% level of significance was utilized as the critical level for acceptance of hypotheses for the study. The following results were obtained from this study. Aerobic exercise resulted in significant improvements in body compositions. Lean body mass increased after training in the both groups. The insulin and leptin improved after aerobic exercise, while the insulin and leptin decreased after resistive exercise without any changes of body weight, % body fat.
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