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사용자 평등성을 제공하는 온라인 웹 서비스 환경의 폭주하는 태스크 관리 기법
조홍래(Hong Rae Cho) 한국정보과학회 2006 한국정보과학회 학술발표논문집 Vol.33 No.1
인터넷 사용자의 급격한 증가와 기업들의 서비스 통합으로 다양한 시스템으로 구성된 온라인 웹 환경의 서비스가 제공되고 있다. 시간제한성의 서비스를 사용할 경우 예측하지 못한 부하발생으로 시스템의 폭주상태가 발생하게 된다. 예측하지 못한 부하에 대해 서비스 품질을 보장할 수 있는 부하제한 방법이 연구되었으나 웹 사용자의 사용패턴을 고려하지 못하고 있다. 본 논문에서는 폭주하는 서비스 상태에서 연계된 시스템 간 부하균형 상태를 유지하면서 사용자에게 동등한 만족도의 서비스 품질을 제공하는 방안을 제안하고 모의실험을 통해 서비스 성공률과 사용 평등성 비율을 분석하였다.
Myoglobin에 의한 급성 신부전에서 Oxygen Free Radical의 역할
김주섭 ( Joo Seop Kim ),정대윤 ( Dae Yune Jung ),김장만 ( Jang Man Kim ),조홍래 ( Hong Rae Cho ),배수동 ( Soo Tong Pai ),강구 ( Gu Kang ),신형식 ( Hyung Sik Shin ) 대한외상학회 1991 大韓外傷學會誌 Vol.4 No.2
Highly reactive oxygen metabolites have been known to have a role in several models of acute renal failure. Especially hydroxyl radicals have been proved to be important mediators by some previous authors. This study was aimed to determine the role of superoxide radical as well as hydroxyl radical and to compare the protective effects of both scavengers in myoglobinuric renal failure. Acute renal failure was induced by intramuscular injection of hypertonic glycerol (6mg/kg, half-dose in each hindlimb muscles) in rats. Rats treated with glycerol and hydroxyl radical scavenger, dimethylsulfoxide (DMSO), showed lower serum blood urea nitrogen (BUN) and creatinine level than rats with glycerol alone. And also significant protection was noticed histologically. Superoxide radical scavenger, superoxide dismutase (SOD), had a similar protective effects. In contrast, allopurinol, an inhibitor of xanthine oxidase, was not protective at all. The present study may suggest that both superoxide and hydoxyl radical playa role of tissue injury in myoglobin-induced renal failure. Beside xanthine oxidase, other souces of oxygen free radical may exist.
저압ㆍ저산소 환경에서 4주간의 간헐적인 무산소성 운동 트레이닝이 골격근의 산소이용 능력에 미치는 영향
문황운(Moon Hwang-Woon),남상석(Nam Sang-Seok),박훈영(Park Hun-Yung),조홍래(Cho Hong-Rae),김승환(Kim Seung-Hwan),선우섭(Sun Woo-Sub) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.4
This study was designed to determine changes in oxygenation of skeletal muscle following intermittent anaerobic training in hypobaric hypoxia. The subjects of study were consisted of each 22 male college students. The subjects were randomly assigned to either a sea-level(n=12) or a hypobaric hypoxia(n=10) traning group. Two groups of subjects trained 3 times a week for a total of 4 wk on a treadmill. Main results of the present study were as follows: 1) body weight and body fat were significantly (p<.05) decreased in hypobaric hypoxia group. and lean body mass were tend to decrease in both two groups. 2) reticulocyte and RBC, oxygen-carrying capacity, were increased in group of sea-level, decreased in group of hypobaric hypoxia, but Hb was increased in both of two groups, Hct was slightly increased in sea-level group only. 3) Hct was slightly increased in group of sea-level group only. 4) Of several data obtained from oxygenated skeletal muscle, △HHb was significantly (p<.05) decreased at 10th minute of exercise in sea-level group and was significantly (p<.05) decreased during exercise From 10-20 minutes of exercise in hypobaric hypoxia group. TOI was significantly (p<.05) increased during exercise in both group. It was concluded that the anaerobic training would have positive effects on body composition and oxygen utilization capacity in skeletal muscle.
김규열 ( Gyu Yeol Kim ),배정한 ( Jeong Han Bae ),서영우 ( Young Woo Seo ),조홍래 ( Hong Rae Cho ),홍은석 ( Eun Seok Hong ) 대한외상학회 2003 大韓外傷學會誌 Vol.16 No.2
In addition to lap and shoulder belt, automotive airbag has reduced the frequency of fatalities and serious injuries from motor vehicle crash. Today, an increasing number of automobiles are being equipped with additional passive safety devices: driver and passenger airbags. With this increasingly frequent application of these safety features in automobiles, there are increasing number of reports about airbag-associated injuries including minor trauma on mainly head, face, eye, chest, and extremities. And also a little number of lethal injuries by airbag deployment were reported. That is even occurred at low velocity traffic collision. If the driver or passenger have his or her hand or arm across the steering wheel hub or torso move forward and contact with airbag module cover before airbag deployed especially if the lap-shoulder restrain is not worn, airbag deployment is then much more likely to cause serious injury even in the very low speed crash. In a review of literatures, the effectiveness of the passenger-side airbag and few data on passenger-side airbag related injury in the frontal crash doesn`t known in Korea, because most cars are equipped with only the driver`s side airbag and the low occupancy rate of the frontal passenger side airbag. This report describes three patients with severe injuries that were caused by airbag inflation during low velocity motor vehicle accidents. We should be aware of the explosive nature of airbag deployment and realize that the injury may be far greater than expected from a low energy motor vehicle accident.