열간가공에 따른 강재특성변화 연구

원용신,석한길 三陟大學校 産業科學技術硏究所 1999 産業科學技術硏究論文集 Vol.4 No.-

This paper discribes the test results on the heating and cooling temperature effects of the hot forming method in bending working of steel plate.

남서울대학교 교직교육과정 개편 방안

허영주,김원곤,전창석,이석열 남서울대학교 2009 남서울대학교 논문집 Vol.15 No.1

The purpose of this study is to search for method that Teacher's curriculum of Namseoul University is been active. For success of this purpose, we analyze strengthening on Teacher's education of Ministry of Education & Science, and analyze Kindergarten and Middle & High School's curriculum. And we examined the present managerial conditionand the problem of Teacher's curriculum in this university. Also analyze curriculum, support system and existing facilities of other universities.According of this analysis, for acting of Teacher's curriculum through the enlargement of advance into the teaching profession, we found alternate Teacher's curriculum. Key Words : alternate, Teacher's curriculum, teaching profession, survey

고층빌딩용 강구조물의 고온 균열에 관한 연구

원용신,석한길 三陟大學校 産業科學技術硏究所 2003 産業科學技術硏究論文集 Vol.8 No.1

Tandem SAW process with high heat input is widely used on steel fabrication industries to enhance the productivity by decreasing the melding layers on comer joint of box column. In this process the crack occurred in partial penetration joint. because of carbon contents. high cooling rate. welding groove and welding speed. Otherwise crack &d not occur in full penetration joint. because of - decreasing carbon dilution from base metal. - improving welding condition between weld surface width and weld depth. - low carbon equivalent by GMAW.

중년여성의 댄스스포츠 참여형태에 따른 만족도 및 활성화 방안

원영두,김미숙 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.4

This study suggested the satisfaction of middle-aged women with dance sports according to its participation type and activation methods of dance sports facilities and conducted questionnaire with total 450 middle-aged women who are participating in dance sports in G metropolitan city in order to offer the basic materials for creating efficient investment and economic profitability of dance sports facilities and data collected were analyzed with SPSS 11.0. One-way ANOVA for analyzing their frequency and satisfaction according to participation type on demographical factors and participation types and activation methods according to participation type in dance sports and multiple correlation analysis for analyzing the relationship between participation type and activation methods were conducted and the following conclusions were obtained. 1. In analysis of participation type of middle-aged women in dance sports, most of them participated in dance sports less than 3 months, frequency of participation in it a week was twice and hours of dance sports was mostly less than 1 hour, 2. In satisfaction of middle-aged women with the period and frequency of participation in dance sports, achievement factor, social factor, leisure and health factors showed statistically significant differences, but participation hours showed significant differences in social, leisure and health factors except achievement factor (p<.05). 3. Study on activation method showed that group participating in dance sports for more than 6 months emphasized the activation of facilities and group participating in dance sports for less than 3 months did that of coach, Group having the career of sports dance between 3 and B months responded program should be activated and improved, On activation of facilities and programs, groups participating in dance sports three times and four times a week had high concerns on it. 4. In correlation analysis between participation type in dance sports and activation methods, participation period and facilities, coach and program showed higher correlations and frequency of participation in dance sports showed higher correlations between coach and program activation, but there was no correlation between facility, coach and program activation according to participation hours.

자궁근종에서 Phospholipase C 동종효소들의 발현에 관한 연구

윤혜원,류임주,김창미,심재철,서영석 대한해부학회 1995 Anatomy & Cell Biology Vol.28 No.4

SCR용 외부혼합형 이유체 노즐개발을 위한 실험적 연구

이영진,박종원,이충원,석지권 朝鮮大學校 機械技術硏究所 2005 機械技術硏究 Vol.8 No.1

소각로 내에서 생성되는 질소 산화물을 저감시키는 SCR 설비의 핵심 기술이 되는 분사 노즐의 특성을 분석하고자 두 유체가 지나는 통로에 선회기가 달린 외부혼합형 이유체 노즐을 선정하여 물과 공기의 유량 및 압력 변화를 주었으며 외부노즐의 오리피스 직경의 변화와 두 노즐 선단부의 상대적인 변화를 주었다. 이와 같은 외부 혼합형 이유체 노즐의 장점은 다른 종류의 노즐을 사용할 때보다 더욱 미세한 액적을 얻을 수 있으며 액체의 유량이 변해도 일정한 형태의 분무각을 유지시켜 준다. 또한 액체의 압력이 기체의 압력보다 높은 경우에도 액체노즐에서 분사되는 액적이 기체 공급관으로 역류하는 일이 없으며, 기체의 압력이 액체의 압력보다 높아도 액체의 분사특성에 거의 영향을 주지 않는다. 그리고 공기가 선회기를 지나서 분사되기 때문에 더욱 활발한 와류가 생성된다. 따라서 분사 액적과 공기와의 혼합이 더욱 잘 이루어지리라 예상된다. 또한 거의 모든 분사압력범위에서 미립화가 잘 이루어지기 때문에 저압에서 고압으로 압력에 따른 분무 특성을 연구하기에도 적합하며 점도가 있는 물질의 분사에 특히 유효하므로 SCR 설비에 적합한 노즐로 사료된다. The effect of the working fluid flow conditions and nozzle geometry on the spray performances of a twin-fluid nozzle used in SCR(Selective Catalytic Reduction) is investigated experimentally. In this experiments, the liquid pressure is varied in the range of 0.3atm to 1.5atm and the annular air pressure is varied from the 0.5atm to 3.0atm. Relative position between liquid and air outlet port changes from 1mm inside the nozzle cap to 1mm outside the nozzle cap. The outer diameter of the air outlet port is varied with 5mm, 6mm and 7mm. Spray visualization is realized with CCD-Camera. SMD(Sauter Mean Diameter) and mean particle velocities are measured by PDPA(Phase Doppler Particle Analyzer) under various experimental conditions. The measuring point is 300mm away from the nozzle tip in the downstream spray. The experimental results are that spray angle is depended Air flow rate because Nozzle diameter, air pressure and nozzle tips relative position(nozzle tip) are related air flow rate. Also, SMD(sauter mean diameter) is depended Air flow rate and Water flow rate. SMD is increased when Water flow ratetwater pressure) is bigger. But SMD is decreased when Air flow rate (Air pressure) is bigger.

소아신증후군 및 연소성 류마티스양 관절염 환자에서 Deflazacort(Calcort^(�))의 임상적 효과

마재숙,우영종,강경원,최기철 최신의학사 1994 最新醫學 Vol.37 No.8

프로스타글란딘 중간체 (R)-4-히드록시-2-시클로펜텐온의 합성

강석구,박영원 성균관대학교 1991 論文集 Vol.42 No.1

D-크실로스를 출발물질로 하여 (R)-4-히드록시-2-시클로펜텐온을 합성하였다. D-크실로스에서 유도되는 메틸렌푸라노스를 산성용액에서 탈보호기화한후 이를 염기성 용액에서 분자내 알콜 반응을 거쳐서 (R)-4-히드록시-2 시클로펜텐온을 합성하였다. The synthesis of(R)-4-hydroxy-2-cyclopentenone from D-xylose is describecl. Acid catalyzed deprotection of the methylene furanose acetonide derivecl from D-xy-lose followed by base catalyzed intramolecular aldol condensation as the key reaction afforded (R)-4-hydroxy-2-cyclopentenone.

탄수화물에 관한 연구 : 헥소퓨라노스고리의 입체선택적 변형 Stereoselective Modification of the Hexofuranose Ring

강석구,박영원 성균관대학교 기초과학연구소 1992 論文集 Vol.43 No.1

D-크실로스에서 얻어지는 퓨라노스고리를 변형시켜 천연물 합성의 중간체를 합성하는 입체선택적 반응을 연구하였다. 이 퓨라노스 고리의 C-3위치에 있는 히드록시기를 Swern산화 조건에서 산화시키는 방법을 연구한 후 얻어진 C-3위치에 케톤에 Grignard, Wittig 반응후 수소환원 등을 통해 퓨라노스고리의 C-3 위치에 입체선택적으로 치환기를 유도하는 방법을 연구하였다. The stereoselective modifications of the hexofuranose ring derived from D-xylose were studied. The method of the oxidation by the Swern oxidation condition on the C-3 position of this furanose ring was developed. Grignard reaction afforded the 3 alcohol, which was transformed into the allylic carbonate to introduce side chain stereoselectively. On the other hand, 3-ketofuranose was subjected to Wittig reaction followed by stereoselective hydrogenation to afford C-3 branched furanose system, which was elaborated to C-4 branched furanose.

인터넷 메타데이타 검색 및 관리 시스템의 설계 및 구현

이원석,박경용,양영종,정효택,김순용,이규철 한국문헌정보학회 1997 한국문헌정보학회지 Vol.31 No.2

인터넷은 디지탈 형태의 다양한 정보를 신속하게 전달한다는 점에서 매우 각광을 받고 있다. 그러나, 대량의 인터넷 정보 중에서 자신이 원하는 정보 자원을 정확하게 많이 얻어 낼 수 있는 방법의 제공은 매우 어려운 문제이다. 본 논문에서는 인터넷 정보 자원의 메타데이타를 관리하기 위해 SeriCore라는 SGML 형식의 메타데이타 DTD(Document Type Definition)를 정의하고, 이들 메타데이타를 효율적으로 저장하고 검색, 관리할 수 있는 시스템을 설계, 구현하였다 The Internet has gained popularity because ot provides various information in digital format. However, it is very difficult to provide methods which make it possible to search adequate information resource from bulk of Internet information. In this paper, we define a SGML metadata DTD, named SeriCore, and design and implement a metadata retrieval and management system which can store, retrieve and manage the Internet metadata efficiently