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운동이 비만 여성의 심근산소소비량과 심전도 QTc 간격에 미치는 영향
이혁종,박윤정,김용권,한구석,진영수 대한스포츠의학회 1999 대한스포츠의학회지 Vol.17 No.1
The purpose of this study was to investigate the effects of exercise staining on MVO_2 and electrocardiogram QTc interval in obese woman and to propose the desirable method for weight loss. Subjects were fifteen obese women for this study. 8 subjects were prolonged QTc interval group and 7 subjects were normal QTc interval. They participated in exercise program consisted of aerobic exercise and weight training exercise at A Medical Center. The body composition including Boyd Weight, BMI, WHR and % Body Fat was measured. The resting and exercise(Bruce protocol 7th min) rate-pressure product(RPP) could be measured with HR and systolic BP for MVO_2 measurement. The electrocardiogram QTc interval was calculated with Bazzett's formula using automated software program. The measured data of this study were as follows: 1) After participating the exercise program consisted of aerobic exercise and weight training exercise, Body Weight, BMI, WHR and % Body Fat were significantly changed in two groups. (p<.05). 2. After participating in the exercise program consisted of aerobic exercise and weight training exercise, the resting and exercise MVO_2 using RPP were significantly changed in two groups(p<.05). 3) After participating in the exercise program consisted of aerobic exercise and weight training exercise, the electrocardiogram QTc interval were decreased but were not significantly changed in prolonged QTc interval group. (p<.29). However, it was significantly decreased in prolonged QTc interval(p<.00).
UGR(Unified Glare Rating)의 보정 및 불쾌글레어 주관평가를 위한 실험적 연구
이진숙,김병수,권혁일 대한건축학회 2003 대한건축학회논문집 Vol.19 No.7
Glare in one of the major factors influencing comfort appraisal for lighting. Although a predictive formula for such glare has been proposed by CIE, it has not been investigated for domestic adjustment. The correlation between glare and the closely related dazzling-sensation has not been investigated enough. In the study, subjective discomfort glare appraisal and dazzling-sensation appraisal for discomfort glare was performed to produce a corrected UGR formula. Analyses between appraisal for dazzling-sensation and results of subjective appraisal for discomfort glare were performed to produce a formula that could represent the correlation between discomfort glare and dazzling-sensation. The results of the comparison and analysis is that results computed by UGR differed from those of subjective perception, so a corrected UGR formula and corrected glare index and dazzling-sensation was produced. Also, a formula that could represent the state of dazzling-sensation verying with change of luminance was produce.
주물공장에서 배출되는 플라이애시를 이용한 속빈 시멘트 블록의 강도특성에 관한 실험적 연구
이홍주,권혁우,진치섭 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.53 No.-
본 연구는 주물공장 플라이애시를 시멘트 대체재로 이용하여 시멘트 블록의 강도특성에 관한 연구를 실험적으로 규명하였다. 본 연구를 위해 Y사에서 주물제조 후 배출되는 플라이애시를 채택하였다. 플라이애시의 특성을 조사한 결과 물리적·화학적 특성은 한국표준규격에서 정한 값을 만족하였으며, 물리적·화학적으로 우수한 것으로 판단되었다. 플라이애시의 성분분석 결과, 분말도와 단위중량이 일반 화력발전소 플라이애시에 비해 크게 측정되었다. 이러한 성질의 차이가 포졸란 활성도와 워커빌리티에서 일반 플라이애시와 서로 다른 메카니즘을 갖게 된다. 시멘트 블록은 플라이애시를 포틀랜드 시멘트 용적의 0%∼50% 만큼씩 대체한 각각의 경우에 대해 제작하여 치수, 흡수율, 및 압축강도를 측정하였으며 측정결과 플라이애시를 시멘트 용적의 5%∼45%까지 대체하였을 때 KS규격에서 정한 속빈 시멘트 블록의 기준치를 만족하는 것을 알 수 있었다. In this paper, as part of a study about the strength properties of cement blocks, using fly as a cement substitution, an experimental study was done. For this purpose, fly ash was sampled from Y casting foundry. First, by looking over the quality of that thing, the following were found; chemical and physical compositions were fit to the value specified in the Korean Standard. On the other hands, that thing was good in chemical and physical phase. After analyzing the results of fly ash, the value of fineness and specific gravity in the casting foundry fly ash was larger than the fly ash at thermoelectric power plant station. Because of this difference, it is expected that pozzolanic activity of concrete using fly ash from the casting foundry will be different from other fly ash. Cement blocks were tested to evaluate block performance when 0 to 50 percent of the portland cement, by volume, was replaced with the fly ashes. As a result, we found that the absorption and strength characteristics of blocks using casting foundry fly ash were over KS criterion when the fly ash replaced 5∼45% of volume of cement.