라덱스 혼입률에 따른 철근콘크리트의 휨파괴 거동특성

정원경,김동호,이주형,임홍범,윤경구 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.A

Reinforced concrete(R/C) is commonly used to structures because they have many merits that compressive strength, economy and so on. However, reinforced concrete has a crack at the tensile section which is due to the relatively lower tensile strength than its compressive strength. Latex modified concrete(LMC) has higher tensile and flexural strength than the ordinary portland cement, due to the interconnections of hydrated cement and aggregates by a film of latex particles. The purpose of this study was to investigate the flexural behavior of reinforced concrete beam with latex modified concrete, having the main experimental variables such as concrete types(ordinary portland cement concrete, latex modified concrete), latex contents(0%, 15%), flexural steel ratios(0.012, 0.0235), and with/without shear reinforcement. The beam of LMC showed considerably higher initial cracking loads and ductility than that of OPC, but, similar to ultimate strength and deflection. This might be attributed to the interlocking of hydrated cement and aggregates by a film of latex particles, water retention due to hydrophobic, and colloidal properties of the latexes resulting in reduced water evaporation. The beam with latex modified concrete could be adopted at field for controlling and reducing the tensile crack due to its higher tensile strength.

도로 종류별 안전도에 관한 연구 : 고속도로와 국도를 중심으로 Focussing the express highway and the national road

윤정길,홍창의,김만배 건국대학교 사회과학연구소 2000 社會科學論叢 Vol.24 No.-

The paper aims to compare the safety between highway and the national road in South Korea. I first of all,we will try to evaluate the accident rates by VEK(vehicle kilometers traveled) for the express highway and for the national road.All things being equal,each accident rate will tell which road is more safe. For the result of this paper, the accident rate, fatal rate, inury rate of the national road are respectively 4.5 times,2.0 times,3 times as hogh as that of express highway. In conclusion, the express highway is more safe than the national road though our method.

미스트 분무 및 스프링클러 관수가 단동 플라스틱 하우스에 미치는 냉각효과

강정윤,최동호,임홍성,허종철 제주대학교 산업기술연구소 2000 尖端技術硏究所論文集 Vol.11 No.2

As crops recently can be cultivated all the year in greenhouses, we need to improve the environment in which crops are able to grow in the summer. Therefore, in this study, we quantitatively got the cooling effects of 4 single span plastic greenhouses in the following ways : by spraying mist or sprinkler, or by opening the side window. and with those variables, we simultaneously did experiments at 4 greenhouses under equivalent conditions to reduce the temperature of the greenhouses in the summer. The results of the experiments are as following : 1) The temperatures of the greenhouses were effectively reduced by both spraying mist and sprinkler. 2) When the mist is intermittently sprayed. the indoor temperature has decreased by 4 degrees centigrade, meanwhile, in the greenhouse to make experiments using sprinkler, the temperature of that has been reduced by 2 degrees centigrade. Therefore, we can see the cooling effects of smaller mist in size as more effective than those of sprinkler. 3) When the greenhouse is naturally ventilated by opening the side window, we have to apply another cooling system because the indoor temperature is higher than the outdoor one.

유아에서 발생한 재발성 외음부 콘딜로마 1례의 치료

홍정희,문성택,김윤숙,전섭,최승도,선우재근,배동한 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.2

..

제2형 당뇨병 환자에서 Voglibose와 Acarbose의 비교임상연구

정인경,정재훈,민용기,이명식,이문규,김광원,정윤이,박중열,홍성관,이기업 대한당뇨병학회 2002 Diabetes and Metabolism Journal Vol.26 No.2

연구배경:아카보스와 보글리보스는 ­glucosidase inhibitors로써 비록 약리학적 작용이나 부작용에 있어서 두 약물간에 차이가 있다는 것은 잘 알려져 있으나 당뇨병 환자를 대상으로 아직 이에 대한 두 약물간에 직접적인 비교에 대해 연구된 바는 없었다. 이에 저자등은 국내 2형 당뇨병 환자에 대해 유효성과 부작용 발현에 대해 두 약제를 비교하고자 무작위법에 의한 위약 대조군의 이중 맹검법 연구를 시행하였다. 방법:시험 약제 투여 4주간의 관찰기를 설정하여 공복혈당의 변화가 30㎎/dL 이하이고, 식후 혈당이 200㎎/dL 이상인 환자로 기타 제외 기준에 해당하지 않은 환자 53명을 대상으로 하여 보글리보스 군(24명)과 아카보스 군(29명)으로 무작위로 나누었다. 치료기간은 총 8주로 하였으며, 4주간 간격으로 혈청학적 검사와 부작용을 분석하여 치료 효과가 부작용을 평가하였다. 결과:1)혈당 변화:보글리보스군은 식후 1시간 혈당이 치료 후 4주, 8주째 의미 있게 감소하였도, 아카보스군은 식후 1시간과 2시간 혈당이 치료 후 4주, 8주째 의미있게 감소하였다. 또한 관찰기 혈당에 대한 치료 4주째 감소량은 아카보스군에서 더 큰 경향을 보였으나, 치료 8주째에는 두 군 간의 강하정도에 의미있는 차이가 없었다(p=0.569). 2)인슐린 치의 변화:보글리스 군은 식후 1시간 인슐린 치가 치료 전에 비해 치료 4주, 8주째 감소하는 경향을 보였고, 공복 인슐린이나 식후 2시간 인슐린치는 치료전 후에 의미 있는 차이가 없었다. 아카보스군에서는 치료 전후로 공복 인슐린, 식후 1시간과 2시간 인슐린치에 의미 있는 차이를 보이지 않았다. 두약제 간에 치료 전과 치료 8주사이의 식후 2시간 인슐린의 감소량이 보글리보스 군에서 의미있게 높았다(p=0.040). 3)당화혈색소:보글리보스 군은 치료 전에 비해 치료후 당화혈색소가 감소하는 경향을 보였고, 아카보스군은 치료 전에 비해 의미있게 감소하였다. 당화혈색소 변화량은 두 군간에 의미 있는 차이는 없었다(p=0.412). 4)지질대사의 변화:중성지방, 콜레스테롤, 고밀도 진단백 콜레스테롤에 대해 두 군간에 의미 있는 차이는 없었다. 5)부작용:소화기계 부작용의 빈도는 치료 4주째 보글리보스 군에서 의미 있게 낮았으나(p=0.028), 치료 8주째 부작용의 빈도는 두 군간에 의미 있는 차이가 없었다(p=0.215). 결론:2형 당뇨병 환자에서 보글리보스와 아카보스의 두 약제의 임상적 유효성과 부작용발현에 대해 비교한 결과 치료 후 8 주 후 혈당강화효과는 두 약제간에 유사한 효과를 보였으나 보글리보스군에서 4주째의 초기 위장관 부작용이 적었다. Background : Acarbose and voglibose are alpha-glucosidase inhibitors. Although different pharmacological effects and adverse abdominal events associated with the two drugs have been reported, no study directly compared acarbose and voglibose in diabetes has been undertaken. To compare the pharmacological effects and gastrointestinal adverse events between two drugs, a randomized, placebo-controlled, double-bind study was performed in type 2 diabetes patients. Methods : The period of study was 12 weeks(observation period: 4 weeks; treatment period: 8 weeks). Fifty-three patients were randomized into two groups(the acarbose group: 24 patients; the voglibose group: 29 patients). The serum glucose, insulin, fructosamine, HbA_1c, cholesterol, triglyceride and the incidence of adverse events were measured. Results : 1) The reduction of glucose from before treatment to 4 weeks after treatment was significantly higher in the acarbose group, but the change before treatment and 8 weeks after treatment in the two groups was similar(p=0.569). 2) The insulin significantly decreased after voglibose treatment(p=0.040). 3) HbAa_1c level tended to decrease in voglibose group, and there was a significant decrease after acarbose treatment. However, the change in HbA_1c level before and after treatment was similar between the two groups(p=0.412). 4) The two drugs did not cause any other changes in the total, HDL-cholesterol and triglyceride. 5) The number of patients with gastrointestinal adverse events was significantly low 4 weeks after voglibose treatment (p=0.049), but the incidence in the two groups was similar after 8 weeks(p=0.215). Conclusions : Acarbose and voglibose significantly improved postprandial hyperglycemia in diabetes. The incidence of gastrointestinal adverse events was low 4 weeks after voglibose treatment(J Kor Diabetes 26:134~145, 2002).

交通安全施設 投資政策에 關한 硏究

尹正吉,洪昌義,金萬培 建國大學校 社會科學硏究所 1997 社會科學論叢 Vol.2 No.-

■Background and purpose Traffic safety facilities is an important tool that it is contribute to traffic flow and safety instead of the roles of a traffic police or maneger in road. The current system for road traffic safety related facilities management is not in a satisfactory state, and more efficient system, therefore, is needed for the policy makers, researchers, and other people. This paper is to analyze the problem in the current system and to make suggestion to establish more efficient system. ■Contents · Analysis of the present road traffic safety facilities management system. - Functional allocation, financial resources, and future demand cost forecast · Case study in Japan. - Comparative analysis between Korea and Japan · Development of road traffic safety facilities management system. - Principles and alternatives for financial resources and functional allocation between central and local government ■Conclusions Traffic safety facilities should be maintained in the current system, in order to enhance operational capacity, secured proffessional manpower and utilized the third sector or RTSA(Road Traffic Safety Association). Also the future traffci safety facilities investment cost is to forecasted 3,400 hundred million won in the 2000 year, therefore is needed financial resources in centural government. In order to secure investment resources for traffic safety facilities should be given improvement plan of special account law

仁川海域 開發에 따른 潮汐變化 및 汚染物質 運送 豫測

鄭信澤,趙烘輦,蔡璋源 圓光大學校 環境建設硏究所 1997 環境建設論文集 Vol.6 No.-

Horizontal 2-D models which includes the wetting-drying treatment technique in the intertidal zone are established for the predietion of tidal changes and contaminant transport due to the development of Incheon coastal zone. Flow model is verified by the measurement data at Jeong-Do, and then the computed value is closely matched to the observed water elevation and velocity of main-flow direction. In the spring tide condition, pollutants transport pattern is simulated for the arbitrary pollutants loads. By the analysis of this numerical simulation results, pollutants are mainly transported by the advection along the narrow deep troughes. Thus, these models can be used as the compatible prediction model for the tidal change and pollutant transport due to the development plan of Incheon coastal zone.

미스트 분무 및 스프링클러 관수가 단동 플라스틱 하우스에 미치는 냉각효과

강정윤,임홍성,최동호,허종철 濟州大學校 産業技術硏究所 2000 산업기술연구소논문집 Vol.11 No.1

As crops recently can be cultivated all the year in greenhouses. we need to improve the environment in which crops are able to grow in the summer. Therefore. in this study. we quantitatively got the cooling effects of 4 single span plastic greenhouses in the following ways: by spraying mist or sprinkler. or by opening the side window. and with those variables. we simultaneously did experiments at 4 greenhouses under equivalent conditions to reduce the temperature of the greenhouses in the summer. The results of the experiments are as following : 1) The temperatures of the greenhouses were effectively reduced by both spraying mist and sprinkler. 2) When the mist is intermittently sprayed. the indoor temperature has decreased by 4 degrees centigrade. meanwhile. in the greenhouse to make experiments using sprinkler. the temperature of that has been reduced by 2 degrees centigrade. Therefore. we can see the cooling effects of smaller mist in size as more effective than those of sprinkler. 3) When the greenhouse is naturally ventilated by opening the side window. we have to apply another cooling system because the indoor temperature is higher than the outdoor one.

KAERI 부지 주변의 환경선량 측정을 위한 온라인 감마선량 감시시스템

이정호,박두원,이원윤,이현덕,최용호,김삼랑,홍광희,이창우 대한방사선 방어학회 1994 방사선방어학회지 Vol.19 No.2

환경감마선량 변동을 감시하기 위해 한국원자력연구소 부지 주변에 온라인 감마선량 감시망을 구성하였다. 모니터링 포스트에 설치된 전리함 검출기에 의해 측정된 자료는 무선전송방식으로 중앙통제소에 전송되어 실시간으로 감시된다. 무선전송 방식은 자료의 전송, 처리 및 자자에 신뢰도가 높고 경제적이었다. 감시시스템은 급격한 선량증가시 조기경보체제와 연결할 수 있게 하였다. On-line gamma monitoring system around KSERI-site was set up to monitor the radiation fluctuations in environment. Data on gamma exposure rates measured by the ionication chamber in the monitoring posts are transmitted to a computer of central control station with radio telemetry transmission and reliable on handing and storing of data. This monitroing system can triger an early warning system in the event of abnormal radiation levels.

순천·광양지역 삼림식생에 대한 식물사회학적 연구

김종홍,신정식,윤경원 순천대학교 2000 순천대학교 자연과학논문집 Vol.19 No.1

The relationship between floristic composition and phytosociological study was investigated from March 1999 to October 1999 in Sunchon and Kwangyang. Depending on physiognomy, actual vegetation map was drawn in 1:25,000 scale. According to Z-M method the surveyed area was classified into seven plant communities, Quercus serrata community, Carpinus laxiflora community, Quercus mongolica community, Pinus densiflora community, Quercus variabilis community, Acer mono community and Pinus koreaiensis afforestation. Whereas the vegetation of Mt. Paegun and Dosolbong is preserved, the others(Duongjuribond, Mt. Yongkae, Kooksabong) are destructed by human interferences.