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신명철,최형섭,최주 대한금속재료학회(대한금속학회) 1974 대한금속·재료학회지 Vol.12 No.3
本硏究는 Ni을 Mn으로 代替시킨 高Mn耐熱鋼의 時效過程中 析出相과 機械約 性質에 關하여 硏究하였다. Mn과 Cr의 含量을 달리하는 鋼에다 높은 含量의 室素를 添加시켰고 그 위에 强化元素인 Nb, Mo, W, B 등을 添加하여 合金의 時效硬化性, 高溫 引張强度, 耐酸化性 및 鍛造性을 調査하였다. 그 結果 위의 諸性質들이 旣存 耐熱鋼에 떨어지지 않았다. 本 合金에서 나타나는 析出相은 M_(23)C_6, Nb(C, N), Cr₂N 및 σ相이었으며 主要 硬化相은 M_(23)C_6 임이 判明되었다. The principal objective of this investigation was to examine precipitated phases during aging sequence and mechanical properties of high manganese heat resisting steels in which manganese was completely substituted for nickel. The influence of alloying elements on the aging hardenability, elevated temperature tensile strength, oxidation resistance and forgeability was investigated by adding elements such as niobium, molybdenum, tungsten, and boron to the steels containing various amounts of manganese and chromium and high content of nitrogen. It was found that the major hardening phase was M_(23)C_6 particles. The other phases identified were Nb(C, N), Cr₂N and σ phase.
Ammonia and Hydrogen Sulfide Removal from Swine House Exhaust Air Using a Dip Injection Wet Scrubber
신명철,이승훈,위지수,안희권 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.6
This study was conducted to evaluate the odor reduction efficacy of the dip injection wet scrubber (DIWS)using tap water as washing fluid. The NH3 and H2S removal efficiency of 7 day batch operated DIWS wasevaluated twice over a total of 14 days of experiment. The NH3 removal efficiency ranged from 26 to 37%. The H2S removal efficiency was between 22 and 30%. The pH of the washing fluid maintained below 8 andthe NH4+ concentration tended to keep constant around 350 ppm after 5 days of washing-fluid replacement. Therefore, the 5-day washing fluid replacement interval is more preferable than the 7-day interval. The NH4+concentration and the electrical conductivity (EC) showed a high correlation. The EC measurement can beused as an alternative to conventional NH4+ concentration measurement method for real time monitoring ofwashing fluid condition.
체감형 배드민턴게임이 초등학생의 동시적 예측 타이밍 과제의 수행에 미치는 영향
신명철,최승오 한국스포츠학회 2019 한국스포츠학회지 Vol.17 No.4
The purpose of this study was to identify the effect of the experience in Nintendo will badminton games on performance in coincident-anticipation timing task in elementary school students. The participants of this study were divided into three groups of elementary school students (9-12 years of age) in D city (Nintendo wii group, technical training group, and control group) and selected 18 people each for three weeks (three times a week, 60 minutes a week). The three way ANOVA was performed to find out the difference between the pre- and post-test groups, and the same group was measured several times using a method of Repeated Measure Design to verify the difference. At this point, the significance level for hypothesis testing is α=.05 is et to 05. Through this process, the Nintendo will badminton game was concluded to have a very positive effect on improving AE (Absolute error), CE (confident error), and sVE (variable error), indicating the accuracy of predictive timing for each speed. 본 연구는 초등학생의 동시적 예측타이밍 과제에서 닌텐도 배드민턴 게임의 경험이 수행에 미치는 영향을 규명하는데 목적이 있다. 본 연구의 참여자는 D시 소재 초등학교 9-12세(Nintendo, 기술연습, 통제)의 3개 집단으로 나누어 3주 동안 주 3회, 주 60분씩 총 18명을 선정하였다. 사전・사후 집단 간 차이를 알아보기 위해 삼원변량분석(three way ANOVA)을 실시하였고, 그 차이를 검증하기 위해 반복측정설계(Repeated Measure Design) 방법을 이용하여 동일한 집단을 수회 측정하였다. 이 시점에서 가설검증의 유의수준은 α=.05로 설정하였다. 이 과정을 통해 닌텐도 배드민턴 게임은 AE(절대오차), CE(항상오차), VE(가변오차)의 개선에 매우 긍정적인 영향을 미치는 것으로 나타났다.
Design and Fabrication of Digital Tuning Analog Component IC
신명철,장영욱,김영생,고진수,Shin, Myung Chul,Jang, Young Wook,Kim, Young Saeng,Ko, Jin Soo The Institute of Electronics and Information Engin 1986 전자공학회논문지 Vol.23 No.6
This paper describes the design and fabrication of a high performance digital tuning analog component integrated circuit that contains a television station detector and decoders(H and L types). When the comparator level sampling method is used, this integrated circuit can be used as a stable channel selector for an external circuit with very large signal variation. It has been fabricated using the SST bipolar standard process and its chip size is 2.2x2.1mm\ulcorner As a result, we have succeeded in fabricating the IC that satisfies the D.C characteristics, and the channel station detector and decoder function.