다중 연료 분사식 SI 기관의 흡ㆍ배기 계통의 해석

윤건식,신흥한,우석근 창원대학교 산업기술연구소 2001 産技硏論文集 Vol.15 No.-

In this study, the calculation of the behavior of gas in the intake and exhaust system of the multi-point injection SI engine has been accomplished under various operating conditions. The generalized method of characteristics including friction, heat transfer, area change and entropy gradients was used to analyze the pipe flow. The simulation models were selected not to depend much on the empirical constants. The constant-pressure model and the constant-volume model were compared to analyze the gas behavior in the plenum chamber in intake system. Through the comparison of predicted results with experiments, the simulation program was verified by showing good prediction of the behavior of IC engine qualitatively and quantitatively over the wide range of operating conditions.

소화관내 이물에 대한 고찰

윤한덕,류진호,박주경,허탁,조석주,김성근,민용일 大韓應急醫學會 1997 대한응급의학회지 Vol.8 No.1

We analyzed records at Chonnam university hospital from Sep. 1. 1993 to Aug. 31. 1996 to assess clinical significance of the foreign body in the gastrointestinal tract. There were 133 episodes consisting of 79 pediatric and 54 adult patients as possible to review. In the pediatric patients, the coin was the most common cause of foreign body ingestion, while adult patients were usually caused by bones and meat. We removed foreign bodies in the oral cavity and oropharynx in 12 cases using direct laryngopharyngoscpy and forcep. Endoscopy was performed successfully in 47 of 51 patients in which was attempted; there were two complications composed of an aspiration pneumonia and a mediastinitis due to esophageal perforation. There were spontaneous passage of foreign bodies in 48 cases. We observed complications in 6 cases in which 4 cases needed operations due to complications. Foreign bodies which pass into the stomach can be observed for development of complications, as 94% of foreign bodies which reach the stomach spontaneously pass. Only 4 patients required interventions, which was done without mortality.

횡문근 융해증의 Tc-99m Methylene Diphosphonate 신티그라피 소견

한창진,박찬희,윤석남,배문선,김수지,신규설 아주대학교 1997 아주의학 Vol.2 No.2

Many causes of rhabdomyolysis have been reported in the literature. Technetium-99m methylene dipho-sphonate (Tc-99m MDP) bone scintigraphy is considered to be the most sensitive and effective modality in defining the extents of disease involvement and follow-up of patients with rhabdomyolysis. In this paper, we reviewed two cases of generalized rhabdomyolysis related to seizure activities and two cases of localized rhabdomyolysis related to an excessive exercise. In addition other causes of rhabdomyolysis and possible mechanisrns of Tc-99m MDP uptake are discussed briefly.

Pastry 마가린 함량과 적층 수에 따른 puff pastry 제조 특성

한장호,김석영,윤여창,이시경 한국응용생명화학회 2003 Applied Biological Chemistry (Appl Biol Chem) Vol.46 No.4

Puff pastry의 제조 공정에서 pastry 마가린 함량과 적층 수의 변화가 제품의 수분 함량, 굽기 손실, 부피, vapor action 등에 미치는 영향을 조사하였다. Pastry 마가린 함량이 90%로 동일하고 적층 수가 27결일 경우 10.8±0.6%의 수분 함량을 나타냈으며, 1024결일 경우 16.7±0.3%로 적층 수가 증가할수록 제품의 수분함량은 증가 하는 경향을 보였다. 적층 수를 256결로 동일하게 하고, pastry 마가린 함량이 50%일 경우는 17.3±0.5%로 나타났으며, 130%에서는 7.5±0.2%로 pastry 마가린 함량이 증가할수록 제품의 수분 함량은 감소하였다. Pastry 마가린 함량을 70%로 동일하게 했을 때 굽기 손실의 변화는 27결일 경우 25.0±0.7%로 나타났으며, 1024결일경우엔 18.8±0.6^로 나타나 적층 수가 증가할수록 제품의 굽기 손실은 감소하는 경향을 보였다. 적층 수를 27결로 동일하게 한 경우에서는 pastry 마가린 함량이 90%일 때 25.4±0.4%의 굽기 손실이 발생하였으며, 110%에서 26.9±0.4%로 굽기 손실이 가장 높게 나타났다. Pastry 마가린 함량이 130%이고 적층수가 81결일 때에 21.87±0.79㎖/g로 최대의 부피를 나타내었다. 또한 vapor action의 크기는 9.15㎜가 pastry 마가린 함량 110%, 적층 수 256결에서 8.25±0.50개로 가장 많이 나타났다. This study was carried out to investigate the effect of pastry margarine content and number of layers on moisture content, baking loss. specific loaf volume and the vapor action in the manufacturing process of puff pastry. As the number of layers of the puff pastry increased the moisture content of the products slightly increased. And the moisture contents of the products decreased, as the pastry margarine contents of the puff pastry increased in the same number of layers. The baking loss of the products tended to decrease as the number of layers increased. On the other hand, as the pastry margarine contents of the puff pastry increased, the baking loss of the product increased. When the pastry margarine content in puff pastries became 130%, 81 layers provided the maximum specific loaf volumes 21.62±0.79 ㎖/g of puff pastries. When 110% of margarine and 256 layers were applied for preparation of puff pastry, the number of vapor action was 8.25±0.50 with the vapor action size of 9-15 ㎜.

Carbofuran이 흰쥐의 간조직과 Cytochrome P-450효소계에 미치는 영향과 Phenobarbital-Sodium의 보상효과에 관한 연구

정윤상,한두석 원광대학교 생체재료·매식연구소 1998 원광생체재료·매식 Vol.7 No.1

In order to investigate the toxicity of carbofuran and compensatory effects of phenobarbital sodium(PB) against carbofuran toxicity on hepatic tissues and cytochrome P-450 enzyme system of the rat. Sprague-Dawley male rats were administered carbofuran only, PB only or combination of carbofuran and PB. Carbofuran was severely damaged in hepatic tissues by dose-or time-dependent manner and increased the level of cytochrome P-450 enzyme system at 6hrs or 12hrs after administration. PB were not damaged in hepatic tissues, but the level of cytochrome P-450 enzyme system was increased the same as that of carbofuran. Histopathlogical changes were observed on hepatic tissues at 12hrs after carbofuran and PB combination f treatment, but were already recovered at 48hrs. PAS-positive cells were increased at 12hrs after carbofuran only administration and most hepatic cells of carbofuran and PB combination treated group showed PAS-positive reaction, but hepatic cells were normally recoverd. Also, glycogen granule were increased at 12hrs after carbofuran only administration, but glycogen granules were decreased at 12hrs. After carbofuran and PB combination treatment in best camine stain. The level of cytochrome P-450 enzyme system after carbofuran and PB combination treatment were more increased than that of carbofuran only or PB only treatment. The results indicate that PB decreased carbofuran toxicity by the elevation in the level of cytochrome P-450 enzyme system.

河川特性을 利用한 流量算定方法에 對한 硏究

김재한,윤여진,윤석영 忠南大學校 産業技術硏究所 1991 산업기술연구논문집 Vol.6 No.2

This slope-area method is widely used to compute peak discharge after the passage of a flood. A reach of uniform channel is selected on which the flood profile on both banks can be defined from high-water marks. Surveys of these high-water marks and of channel cross sections and estimates of the roughness coefficient in the Manning equation are required. Thus the roughness coefficient still must be selected by judgement based on guidelines and experience. The simplified method shows that results of comparable accuracy can be obtained from area and slope alone in natural channels and the existence of a relation between channel roughness amd water-surface slope in natural channels suggests that discharge might be computed without using a roughness coefficient and defining the relation of roughness coefficient to slope. Errors in applying the slope-area method are associated within values, scour, expansion and contration losses, viscosity, unsteady flow, number of cross sections, state of flow and stream slope.

임신과 동반된 난소섬유난포막종 1례

류은석,김윤숙,전섭,김종수,최승도,선우재근,배동한,양승화 순천향의학연구소 2005 Journal of Soonchunhyang Medical Science Vol.11 No.1

Fibrothecoma are mesenchymal tumors deriving from the ovarian stroma and consisting of theca-like elements and fibrous tissues. The reported incidence is between 0.4 and 8.0% of all ovarian tumors and this side variability can be attributed to the difficulty in differentiation fibrothecoma from ovarian fibroma or hyperplastic stroma nodules. We experienced a rare case of ovarian fibrothecoma in woman at 38 weeks gestation with previous repeat cesarean section diagnosed after tertiary cesarean delivery and bilateral tubal ligation with a brief review of literature.

유해자극에 의한 개구반사와 말초신경 흥분전도에 미치는 건간과 세신 추출물의 영향

최한석,윤수한 大韓齒科保存學會 1992 Restorative Dentistry & Endodontics Vol.17 No.1

장기입원환자 관리 방해요인

이경석,윤석만,권희,이호,김혜경,조미자,한규남,김명성 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1

Background: Recently the health insurance review agency tried to cut off the cost of unnecessary hospital stay. It is important to reduce the prolonged occupation of the hospital beds. However, there are some obstacles of the management for the prolonged bed occupation. We report our experiences and the problems of bed-control. Methods: To increase the rate of effective bed-usage, a task force was made. This team was consisted of 4 dctors, 2 nurses and 2 personnel of the administrative department. From December 20th 2001 to May 17th 2002, the task force analysed the rate, number and causes of the prolonged (more than 60 days, regardless of the disease entities) bed occupation. We announced and explained the necessity of bed-control and actively pressed to reduce the prolonged bed occupation. Results: The number of the prolonged bed occupation was 71 at the beginning of the management. It was reduced to 46 at best, then turned back to 65 at the end. It seems to be impossible to reduce the prolonged bed occupation until there are sufficient numbers of long-term care facilities. Aggressive bed control makes the sick patients to move every two or three months, it is never desirable. Conclusion: We cannot expect any Quality Improvements without improvement of the wrong system. Prior to the management for the prolonged bed occupation, it is necessary to build a sufficient number of long-term care facilities.

개 이자의 Somatostatin 양성세포의 발달에 관한 면역조직화학적 연구

장인엽,윤상필,정윤영,김종중,문정석,한길현,김영택,안계훈,선희매 조선대학교 부설 의학연구소 1998 The Medical Journal of Chosun University Vol.23 No.2

Cells immnunoreactive for somatostatin(SOM) and glucagon(GLU) were investigated in postnatal day 0, 7, 14, 28, 90, 180 and adult canine pancreas using light microscopic immunohistochemistry. Pancreatic SOM-immunoreactive cells were found in pancreatic acini, pancreatic duct, and pancreatic islet gradually. Pancreatic SOM-immunoreactive cells were more located in pancreatic parenchyme than pancreatic islet throughout pancreas by postnatal day 28. But there was change by the postnatal 3 months : pancreatic SOM-immunoreactive cells were more located in pancreatic islet than acini and duct. It is suggested that the number of the SOM-immunoreactive cells may not increase with age apparently. A small number of SOM-immunoreactive cells that showed GLU-immunoreactivity were also observed in canine pancreatic islet. The physiologic consequences of these changes remain to be determined. These results sugegest that SOM in the developing pancreas may relate to the secretion of pancreatic hormones.