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RISS 인기검색어
- 검색키워드
- 저자 : Soo-mi Eo (검색결과 44 건)
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장기간 훈련이 임피던스 심장기록법에 의한 운동중 심근산소소비량 및 좌심실 기능에 미치는 영향
오미경,어은실,최건식,황수관 대한스포츠의학회 1994 대한스포츠의학회지 Vol.12 No.1
Impedance cardiography gas been used to measure stroke volume and left ventricular ejection time since 196's and the measuring technique have been improved to use during exercise. However, the old technique made impedance recording unreadable due to motion artifacts during exercise. Recently, ensemble averaging technique with elastic meshed brass band was applied to it for eliminating motion artifact during exercise. Then, it was used to compare the cardiac function between athletes and non-athletes during bicycle ergometer exercise. The results are summarized as follows. 1) Heart rate of the athletes was significantly lower during exercise and more rapidly recovered after exercise that that of the non-athletes. Systolic blood pressure and diastolic blood pressure of the athletes was lower than those of the non-athletes. 2) Rate-pressure product(RPP) showing myocardial O_2 consumption of the athletes was significantly lower than that of the non-athletes. 3) Left ventricular ejection time(LVET) of the athletes was significantly longer than that of the non-athletes. 4) Cardiac index(CI) of the athletes was significantly higher than that of the non-athletes. While CI of the athletes was continuously increased up to 18 minutes during exercise, that of the non-athletes was increased up to 15 minutes and then decreased at 18 minutes. 5) At the same LVET and RRP, CI of the athletes was significantly higher than that of the non-athlethes. 6) Correlations between LVET and RPP, RPP and CI, LVET and CI during exercise, there was no significant difference between athletes and non-athletes. From these results above, it is concluded that the cardiac function of the athletes is superior to that of the non-athletes by comparing all the parameters. This newly improved impedance cardiography was able to measure LVET and cardiac index, noninvasively, and is expected to contribute to the study for evaluating the cardiac function of the athletes during exercise as well as that of the patients in cardiac problems.
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하계 실내 및 실외환경의 공기 중 휘발성 유기화합물 농도 및 개인노출
양원호,손부순,박종안,장봉기,박완모,김윤신,어수미,윤중섭,류인철 한국환경과학회 2003 한국환경과학회지 Vol.12 No.9
Volatile organic compounds (VOCs) are present in essentially all natural and synthetic materials from petrol to flowers. In this study, indoor and outdoor VOCs concentrations of houses, offices and internet-cafes were measured and compared simultaneously with personal exposures of each 50 participants in Asan and Seoul, respectively. Also, factors that influence personal VOCs exposure were statistically analyzed using questionnaires in relation to house characteristics, time activities, and health effects. All VOCs concentrations were measured by OVM passive samplers (3M) and analyzed with GC/MS. Target pollutants among VOCs were Toluene, o-Xylene, m/p-Xylene, Ethylbenzene, MIBK, n-Octane, Styrene, Trichloroethylene, and 1,2-Dichlorobenzene. Indoor and outdoor VOCs concentrations measured in Seoul were significantly higher than those in Asan except Ethylbenzene. Residential indoor/outdoor (I/O) ratios for all target compounds ranged from 0.94 to 1.51 and I/O ratios of Asan were a little higher than those of Seoul. Relationship between personal VOCs exposure, and indoor and outdoor VOCs concentrations suggested that time-activity pattern could affect the high exposure to air pollutant. Factors that influence indoor VOCs level and personal exposure with regard to house characteristics in houses were building age, inside smoking and house type. In addition insecticide and cosmetics interestingly affected the VOCs personal exposure. Higher exposure to VOCs might be caused to be exciting increase and memory reduction, considering the relationship between measured VOCs concentrations and questionnaire (p<0.05).
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곽미애(Mi-Ae Kwak),정종흡(Jong-Heub Jung),어수미(Soo-Mi Eo),이홍근(Hong-Keun Lee) 대한환경위생공학회 2004 대한환경위생공학회지 Vol.19 No.3
This study was conducted to evaluate the variation characteristics of influent and effluent quality from sewage treatment facilities using activated sludge processes and to assess the impact caused by discharge of treated sewage on the receiving water. Monthly data of five water quality items (BOD, COD, SS, T-N, T-P) were used to understand the water quality at three sewage treatment plants in Seoul for five years from 1999 to 2003.<br/> Concentration differences of water quality parameters were observed between upstream and downstream site at the sewage treatment plant outfall to investigate the impact of discharge in Tan stream and Han river basin.<br/> 1. Due to the effect of continuous improvement in sewer system, the concentrations of influent went on increasing generally.<br/> 2. Effluent concentrations of BOD, COD and SS showed the trend of a little decreasing, but the trend of increasing in T-N and T-P.<br/> 3. In Tan stream basin, the impact of sewage treatment plant discharge was not observed directly, because concentration of discharge was lower than stream water's. But discharges from sewage treatment plants affected water quality at downstream site in Han river, concentration of T-P especially.
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