콘트리트내 보강용 강철의 부식 거동에 관한 연구

서보민,이종권 순천향대학교 부설 산업기술연구소 2000 순천향 산업기술연구소논문집 Vol.6 No.1

Corrosion of reinforced steel in concrete structrure is affected by chloride content in the concrete. It is impossible to predict the corrosion failure until it occurs. In that sense, it is necessary to develop corrosion monitoring technique before the structure is destructed. The corrosion potentials of the reinforced bar, as a corrosion monitoring method, were measured for 10 months in concrete containing 0 to 3.5% sodium chloride contents. The variations of potential with time were discussed. The corrosion potentials were compared to the appearances of the rebars after the structure were intentionally destructed. It was found that the potential measuring method was very effective for corrosion monitoring.

상악골과 비사골동에 이환된 백악질 골화성 섬유종(cemento-ssifying fibroma)의 치험례

권대현,김신유,남정순,구명숙,이봉서,권대근,김종배 大韓顎顔面成形再建外科學會 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.6

The cemento-ossifying fibroma is a benign fibro-osseous tumor that may behave in an aggressive pattern. Although found predominantly in the mandible, most of these unusual tumors may arise in the maxilla and paranasal sinuses. Especially these lesion in the maxilla and sinuses behave more aggressively and are more prone to recur compared to mandibular counterparts. Therefore, more radical approach may be recommended than expectant observation or curettage in the initial management of this neoplasm. This is a case report of cemento-ossifying fibroma extended to maxillary sinus and naso-ethmoidal area treated by wide surgical excision after repeated conservative treatments.

고층사무소건물의 매스구성을 위한 전문가 시스템의 개발에 관한 연구

서정훈,박상현,권종욱 영남대학교 환경문제연구소 2000 環境硏究 Vol.20 No.1

건축에서의 전문가 시스템은 설계자에게 많은 가상적인 해결안을 반복해서 수집해야할 수고를 줄여주고 모델링이나 정보제공과 같은 정형적인 측면과 설계의 판단, 상황별 특성과 같은 비정형적인 측면을 연결시키는 도구로 작용한다. 본 연구는 고층사무소건물의 설계과정 중 매스 구성 단계에서 중요한 역할을 하는 요소를 찾아내고, 그 요소들의 정형화 및 표준화 작업을 통해 고층사무소건물의 매스구성을 보조하는 전문가 시스템을 개발하는데 그 목적을 두었다. 본 연구에서 얻어진 결론을 요약해보면 다음과 같다. 건축설계작업 중 매스구성 단계를 제한조건을 만족시켜나가는 제한조건 만족모델로 인식할 수 있었으며, 이 제한조건의 일부를 체계화하여 건물의 매스구성을 보조할 수 있는 시스템을 개발하는 것이 가능하였다. 또, 개발된 시스템을 실제 사례를 통해 평가해 본 결과 타당성 있는 결과물을 산출할 수 있었다. In architecture, the expert system helps architects reduce unnecessarily repeated process. It also serves as a tool of linking patterned processes such as medeling and information provision, with unpatterned processes like decision-making process which can produce different results depending on the situation. This study is devoted to develop an expert system which is helpful to find out the important factors in massing process and to assist the massing of high-rise office buildings through patternization and standardization. The conclusion from the study as follows; It is definitely possible to make the expert system recognize the massing process as a process of meeting all the constraints on a step-by-step basis. So, the developed expert system can assist the massing process by systemizing parts of the constraints. It also proved that the developed knowledge-based system can produce proper outputs as its test showed during the study.

Effect of Meteorological Element on Growth and Yield of Sesame

Kwon,Byung-Sun,Shin,Jeong-Sik,Shin,Jong-Sup,Choi,Seong-Kyu,Seo,Young-Nam 한국자원식물학회 2002 Plant Resources Vol.5 No.3

This study was conducted to investigate the relationships between yearly variations of climatic elements and yearly variations of productivity in sesame. In addition, correlation coefficients among yield and yield components were estimated. The data of yield and yield components were investigated for 10 years from 1992 to 2001. The meteorological data gathered at the Yeosu Weather Station for the same period were used to find out the relationships between climatic elements and productivity. Yearly variation of the amount of precipitation in July and September were large with coefficients of variation(c.v.) of 64.59, 92.47%, respectively, but the variation of the average temperature in June and August were relative small. Yield and plant height greatly with c. v. of 26.24, 23.41 %, respectively, 1, 000 grain weights show more or less c.v. of 3.83% and length capsule setting show still less variation. Correlation coefficients between maximun temperature in period of cultivation(from June to September) and yield are positively significant at the level of 5.1 %, respectively. Correlation coefficients amount the plant height, length capsule setting, number of capsules per plant, weight of 1, 000 grains and seed yield were positively significant at the level of 1 %, respectively. Simple linear regression equations by the least square method are estimated for number of capsules per plant(Y₁) and the maximun temperature in August(X) as Y₁=10.1255+0.1725X, and for yield(Y₂) and the maximun temperature in August(X) as Y₂=21.6151 + 1.3724X.

중부지역 옥수수 파종기에 따른 생육단계 및 수량성 변화

서종호, 문중경, 정건호, 서민정, 구자환, 박장환, 배환희, 신성휴, 권영업 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2

Maize hybrids were planted on April 1, April 25, May 20 and June 15 in 2012, 2013 at the experimental paddy and upland fields in Suwon city , respectively to know changes of growth stage and yield according to different planting time. Maize planting on April 1 was not recommended because total growing days at planting on April 1 was not different with that at planting on April 25 due to many days from planting to emergence over 20 days at planting on April 1. Total growing days were not much different among three planting time after April 25 because days from silking to maturity was lengthened though days from planting to silking was shortened at later planting time. Stalk weight was decreased as planting time was delayed, particularly at planting times after May 20 at paddy field by excess water injury during early growth stage. But, grain yield was not low as in May and June. It is needed to introduce early maturity maize variety as Yanganok at late planting for higher grain yield and enough time for soil preparation for next winter crops

토치작업에서 노출된 이산화질소에 의한 폐부종 1례

안종준,제갈양진,서광원,권운정,최나리,김양호 대한산업의학회 2007 대한직업환경의학회지 Vol.19 No.3

평면도파로의 소산장 결합을 이용한 광섬유형 자외선센서의 광강도에 따른 감도변화

윤종국,서규원,조강민,권혁춘,강신원 경북대학교 센서기술연구소 2002 센서技術學術大會論文集 Vol.13 No.1

철근 또는 강판을 이용한 철근콘크리트 전단벽의 휨성능개선에 관한 실험연구

하기주,서수연,신종학,최민권 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

The purpose of this paper is to study retrofit methods for improving the flexural capacity of RC shear wall. Four RC shear wall specimens are designed and strengthened by using reinforcement or steel plate. Cyclic loads are applied to the specimen under constant axial force. Test result shows that the strength and ductility of specimen is improved when it is strengthened using reinforcement or steel plate. The specimen retrofitted by using steel plate shows high ductility. However the strength contribution of one is not much. It is shown that the most effective method is both to install the additional flexural reinforcement and to confine the ends of wall.

장생도라지의 약리작용

성낙주,서종권 경상대학교 농업자원이용연구소 1998 심포지엄 자료집 Vol.1998 No.1

도라지 (길경, Platycodon grandiflorum A. DC)는 예부터 천식, 기관지염 등에 효능이 인정되어 약용 및 식용으로 널리 이용되어 왔다. 장생 도라지에 대한 연구로 식이성 고혈압 흰쥐에 도라지 분말을 각 5%와 10% 함유한 식이를 3주간 급이하였을 때 혈청과 간장의 지질 농도가 현저하게 감소하였으며, 5%의 도라지 분말 함유 식이의 급이시 도라지를 급이하지 않은 군에 비하여 혈청과 간장의 총콜레스테롤과 중성지질의 농도가 현저하게 감소하였고, alloxan minihydrate를 체중 kg당 15 mg의 농도로 3주간 복강내 주사하여 당뇨를 유발시킨 흰쥐에 6년근과 22년근 도라지 추출물의 급이시 혈당 및 혈청과 간장의 지질 개선에 효과가 있었고, 또한 항암효과에 관한 연구로는 도라지 추출물을 B16-F1 mouse melanoma 세포에 처리해 laminin의 결합력을 실험한 결과 0.125 mg/ml 이상의 농도에서는 100%저해능을 보였으며, mice에 있어서 고형암의 무게를 61.5% 감소시켰으며 sacoma-180 ascites에 대한 생존일수 연장율이 128%에 달하는 것으로 관찰되었다. 도라지의 에탄올 추출물을 극성을 달리한 용매로 분획하여 각 획분의 항균성을 실험한 결과 23년근 도라지의 부탄올획분의 M. luteus에 대한 초소저해농도는 3년근에 비하여 28배나 더 낮은 값을 보였으며, 이를 실리카겔 칼럼 그로마트그래피와 HPLC를 이용하여 에틸아세테이트획분의 항균물질을 분리·정제한 결과 데틸아세테이트획분보다 S. epidermidis에 대해 2∼3배 더 강한 항균력이 관찰되었고 23년근 도라지의 주요 항균물질을 동정한 결과 giycerol linolate임이 확인되었다. The root of Platycodon grandiflorum (p.g.) A. DC (Platicodi radix) has been prescribed frequently for cough and bronchitis as an expectorant in a traditional oriental medicine, and used as a food. Diet-induced hyperlipidenic rats were fed diets containing 5% and 10% p.g (twenty-three years). powder for 3 weeks, the p.g. feeding markedly decreased both serum and liver lipid concentrationds in hyperlipidemic rats. Especially, 5% p.g. diet significantly decreased the concentrations of total cholesteril and triglycerides in serum and liver as compared with those of thr hyperlipidemic control group. The effects of the feeding p.g. (6 or 22 years) extract on the blood glucose, lipids in the serum and liver of alloxan induced hyperglycemic rats (S.D. strain, ♂), alloxan monohydrate 15㎎/㎏ B.W./day, I.P. injection for 3 weeks. concentrations of blood glucose were significantly higher in the allozan administration groups than those in the control group. When p.g. extracts treated in vitro with B16-F1 mouse melanoma cell lines, it showed 100% laminin-binding inhibitory activities at the concentration over 0.125 mg/ml in vivo test it showed 61.5% reduction of the solid tumor weight transplanted in mice and exhibited anticancer activity of 128% ILS against sarcoma-180 ascites. The ethanol extract of p.g. was fractionated by various solvents with different polarities, and the antibacterial activities of each fraction were tested. The minimal inhibitory concentration (MIC) values of each graction of Platycodi radix (twenty-three years) ethanol extract was lower than that of Platycodi radiz (three years) ehanol extract. the MIC value of Platycodi radix(twenty-three years) butanol fraction against M. luteus was 28 times lower than that of Platycodi radiz (three years) butanol fraction. The antibacterial compound was isolated and purified from the ethylacetate fraction by silica gel column chromatography and HPLC, and exhibited 2 to 3 times more antibacterial activity against S. epidermidis than ethylacetate fraction. The major antibacterial compound of Platycodi radix (twenty-three years) was identified to be a glycerol linolate.

경안면 괴사성 근막염의 처치

김신유,이봉서,권대근,김종배 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.4

Necrotizing fasciitis is a rapidly progressive soft tissue infection with high mortality rates, characterized by diffus necrosos of fascia and subcutaneous tissue. It most commonly affects the abdominal wall, the perineum and the extermities, but head and neck involvement can occur. Patients often have an underlying systemic disease such as diabetes mellitus, alcoholism, malntrition or chronic renal failure. Successful management of this life-threatening condition requires early diagnosis, prompt institution of broad spectrum antibiotics and aggressive surgical intervention combined with supportive care such as airway maintenance anf hyperbaric oxygen therapy. We reviewed cervicofacial necrotizing fasciitis in Korea with our cases, and pathophysilogy, diagnisis and treatment of this patentially lethal entity were investigated.