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김준봉(Junbong Kim),오승철(Seungchul Oh),서기성(Kisung Seo) 대한전기학회 2016 전기학회논문지 Vol.65 No.5
Wind speed is heavily fluctuated and quite local than other weather elements. It is difficult to improve the accuracy of prediction only in a numerical prediction model. An MOS (Model Output Statistics) technique is used to correct the systematic errors of the model using a statistical data analysis. The Most of previous MOS has used a linear regression model for weather prediction, but it is hard to manage an irregular nature of prediction of wind speed. In order to solve the problem, a nonlinear regression method using SVR (Support Vector Regression) is introduced for a development of MOS for wind speed prediction. Experiments are performed for KLAPS (Korea Local Analysis and Prediction System) re-analysis data from 2007 to 2013 year for Jeju Island and Busan area in South Korea. The MLR and SVR based linear and nonlinear methods are compared to each other for prediction accuracy of wind speed. Also, the comparison experiments are executed for the variation in the number of UM elements.
전통한옥 설계기법을 적용한 북한의 현대한옥설계 기초연구
김준봉(Kim June Bong),백홍열(Back Hong Youl),유우상(Yu Woo Sang) 국제온돌학회 2013 International Journal of Ondol Vol.2013 No.-
21세기는 문화가 경쟁하는 민족개성의 시대로 나아가고 있다. 본 연구는 한옥의 부흥과 ‘현대한옥’ 실현을 위한 연구의 한 방법으로 북한의 현대한옥에 연구를 통해 한옥의 범위를 확장하고 현대한옥의 하나의 범위로 그 가능성을 모색하기 위한 연구이다. 이제 건축에서도 분명 새로운 한옥의 시대가 도래하였고 이 시대의 한옥이 어떠해야 하는지 생각해 봐야 하고 앞으로 우리의 후손에게 남겨줄 지금의 한옥을 정립하여야 한다. 그러기 위해서는 과거 우리의 한옥이 어떠했는지 알아야 함이 먼저 선행되어야 한다. 이를 바탕으로 한옥에 적합한 기법을 찾아내고 지금 우리가 사는 이 시대 이 장소에서 새롭게 적응시킬 수 있는 설계와 시공에 대한 연구가 필요하다. 이러한 바탕에서 본 연구는 북한의 대형공공건물에 전통설계기법을 적용한 방법을 통해서 이 시대 대한민국에서도 실현 가능한 현대한옥의 기초 자료를 제공하고 북한에서 그간 연구하고 진행하고 있는 북한의 현대한옥을 조사 연구함으로 우리 현대 한옥의 나아갈 방향에 대한 단서를 제공한다.
김준봉(Kim, June-Bong) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2
The purpose of this study was to compare and evaluate the basic performance of physicochemical, mechanical, and thermal characteristics according to the types of rocks in Gudeuljang. As a basic study for building technologies such as Ondol, Gudeuljang, the conclusion of this study is as follows. It was found that jadeite plate has the highest density and very low absorption rate, and elvan stone has similar density to volcanic rock, but the absorption rate is relatively high at 4.48%. Elvan stone, Mt. Obong, the main rock used as Gudeuljang in Boseong has a small density and high water absorption, while it has excellent mechanical properties of compressive and flexural strength and has the lowest thermal conductivity.
공업화학 , 촉매 / 반응공학 : 연소합성을 이용한 탄화질화 티타늄 세라믹 제조에서의 연소특성
김상환(Sang Hwan Kim),강태성(Tae Sung Kang),김준봉(June Bong Kim),강공원(Kong Won Kang) 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.5
The combustion synthesis of titanium carbonitride ceramics with excellent hardness and chemical stability to oxidation at high temperatures was investigated. The compacted reactants remained at a relatively high temperature for the greater length of time after the passage of combustion front transversing the compact. After-burn time of about 20 to 100 seconds was detected for producing titanium nitride and titanium carbonitride ceramics. After-burn time increased with the increasing ratio of carbon to titanium in the reactants, reached the maximum value at its ratio of 0.7, and thereafter decreased with the further increasing ratio of carbon to titanium. The combustion temperatures as well as the velocity of combustion waves increased with the increasing ratio of carbon to titanium in the reactants. The velocity of combustion waves reached the constant value of 0.4 ㎝/sec at higher ratio of carbon to titanium than 0.70 in the reactants. The microstructure of combustion-synthesized titanium carbide using the carbon black as carbon source showed the existence of titanium melting during the combustion reaction and the capillary spreading of melted titanium between the interstices of solid carbon. The surface of combustion-synthesized titanium carbonitride revealed that the carbon black was active for producing the carbonitride ceramics and the decreasing ratio of carbon to titanium in the reactants enhanced the melting of the titanium during the reaction.