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$NH_3-NO-Ar$혼합기체의 점화 과정에 관한 충격관 실험 및 모델 연규
신관수,배균탁,심승보,류시옥,Shin, Kuan Soo,Bae, Gyun Tack,Shim, Seung Bo,Ryu, Si Ok 대한화학회 2001 대한화학회지 Vol.45 No.2
The ignition of NH$_3$-NO-Ar mixtures was examined in the temperature renge of 1675-2391 K behind reflected shock waves. The ignition delay times were measured by monitoring pressure profiles and the OH emissions at 1.0 cm from the end wall. A correlation between ignition delay times and concentrations of gases could be summarized in the form of mass-action expression, To complement the experiment, computer modeling study of the ignition of NH$_3$-NO-Ar mixtures was carried out using various mechanisms reported previously. The sensitivity analysis shows the reaction of NH$_2$+NO${\rightarrow}$NNH+OH is the most important step in the ignition of NH$_3$-NO-Ar mixtures. NH$_3$-NO-Ar 혼합기체의 점화 과정을 반사 충격파를 이용하여 1675-2391 K 온도 범위에서 고찰하였다. 점화지연시간은 충격관 끝에서 1.0cm떨어진 곳에서 압력 변화 및 OH 라디칼의 광 방출을 측정하여 구하였으며, 점화지연시간에 대한 각 기체의 농도 및 온도 의존도에 관한 관계식을 구할 수 있었다. 그리고 NH$_3$-NO-Ar 혼합기체의 점화 과정에서 중요한 역할을 하는 단일단계반응들을 살펴보기 위해 기존에 제안된 다양한 반응 메카니즘들을 이용한 모의실험을 수행하였다. 또한 민감도 분석 등을 통해 NH$_2$+NO${\rightarrow}$NNH+OH 반응이 점화과정에서 가장 중요한 반응임을 알았다.
BCG 접종후 발생한 림프선염의 외과적 치료후 Isoniazid 투여의 필요여부
신관수,이남혁,김상윤,Shin, Kwan-Soo,Lee, Nam-Hyuk,Kim, Sang-Youn 대한소아외과학회 1997 소아외과 Vol.3 No.1
Regional lymphadenitis is the most common complication following BCG vaccination in this country. The literature describes controversial results with medical, surgical and combined therpy. The purpose of this study is to clarify the therapeutic effect of isoniazid(INH) after surgical procedures. The early and late postoperative complications of 136 children with lymphadenitis following BCG vaccination at the Taegu Fatima Hospital between March 1985 and February 1996 were reviewed. In 90 children, INH was given for 3-4 days before operation and for 3 months after surgery. In the other 46 cases, INH was not given during the pre- or postoperative period. Surgical procedures were excision or incision and currettage according to the states of lesions. Postoperative complications were fluid accumulation, wound infection, sinus formation and others. Complication rates were 14.4 % in INH-treated group and 13.0% of INH-nontreated group. The difference was not significant. There was no recurrence or other late complication in either groups. The result suggest that surgical excision or incision and currettage are sufficient for the treatment of regional lymphadenitis following BCG vaccination and postoperative INH therapy is not necessary.
신관수,Shin, Kwan-Soo 한국생산제조학회 2010 한국생산제조학회지 Vol.10 No.6
Due to the increasing demand for carious methodologies to improve the quality of products were introduced. A Brush the most frequently used type of grinding process is one of the deburring. in order to produce consistent burr shape, various machining conditions have been combined and applied to disk grinding process. Between the workpiece and the grinding disc to earn depends on the angle of the slope has been observed. Drastic increase of tool wear has been also observed along the inclination angle variation. Various burr shapes have been captured and analyzed using image processing technique.
신관수,Shin, Kwan-Soo 한국생산제조학회 2009 한국생산제조학회지 Vol.25 No.4
The purpose of this study is to predict the roundness of Numerical Control Machining so that helps the operator to choose the right machining conditions to produce a product within the given error limits. Learning of neural network is Backpropagation theory. From this study, the base was set to setup the database to produce precisely machined product by predicting the rate of error in the fabrication facility which does not have the environment to analyze it.
잔골재의 종류 및 감수제 첨가율에 따른 콘크리트의 공학적 특성에 관한 실험적 연구
신관수(Shin Kwan-Soo),김영덕(Kim Young-Duck),나철성(Na Chul-Sung),조봉석(Cho Bong-Suk),김규용(Kim Gyu-Yong),김무한(Kim Moo-Han) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.1
Recently, trouble of sand supply is occurred according to exhaustion of natural sand resources. To solve this problem, sea sand and crushed sand are used. But, necessity of water reducing agent because quality of concrete that use sea sand and crushed sand is deteriorated. Therefore in this study was examined on the engineering properties of concrete with kind of fine aggregate and addition ratio of water reducing agents. As a result, if addition ratio of water reducing agents increase, bleeding capacity was increased and setting time delayed regardless of kind of aggregate. Moreover compressive strength appeared similar standard in early-age as time goes by.
잔골재의 종류 및 감수제 첨가율에 따른 콘크리트의 공학적 특성에 관한 실험적 연구
신관수 ( Shin Kwan-soo ),김영덕 ( Kim Young-duck ),나철성 ( Na Chul-sung ),조봉석 ( Cho Bong-suk ),김규용 ( Kim Gyu-yong ),김무한 ( Kim Moo-han ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1
Recently, trouble of sand supply is occurred according to exhaustion of natural sand resources. To solve this problem, sea sand and crushed sand are used. But, necessity of water reducing agent because quality of concrete that use sea sand and crushed sand is deteriorated. Therefore in this study was examined on the engineering properties of concrete with kind of fine aggregate and addition ratio of water reducing agents. As a result, if addition ratio of water reducing agents increase, bleeding capacity was increased and setting time delayed regardless of kind of aggregate. Moreover compressive strength appeared similar standard in early-age as time goes by.