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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.
건축물의 높이 제한 폐지가 필지 단위 주택개발에 미치는 영향
신명철,이재수 한국도시부동산학회 2019 도시부동산연구 Vol.10 No.3
Urban residential housing(URHs) was introduced to promote the supply of small houses. The development of small-scale land units, represented by URHs, was developed on the outside of the street area due to limited development location due to the height limit of buildings. Since the relevant regulations have been abolished, an analysis of the effects on small-scale development and the spread of inner development in the street areas is required. The land use types were divided and the method of analysis was based on binary logistic regression. As the analysis results showed the abolition of the relevant regulations, URHs was spread to the inner part of the street area. The spread of URHs can worsen the residential environment and make it difficult to plan urban management in the existing cross-border areas. Therefore, it is necessary to introduce a small-scale urban management plan at the street level and to provide public support to improve the residential environment.
신명철,김철환,성낙환 成均館大學校 科學技術硏究所 1990 論文集 Vol.41 No.1
To maintain the high reliability and stability in the large scale electric power system for a stabilized power supplying, it requires an accurate high speed digital distance relaying techniques. For this purpose, when it comes to faults with the power system, the digital distance relaying techniques must be investigated to extract the fundamental frequency component and to predict fault location. In this thesis, it is presented the methodology of DFT(discrete Fourier transform), which accompanied aliasing, picket -fence effect, and leakage in the process of extracting fundamental frequency component and an algorithm of extracting fundamental frequency component, using the Kalman filter theory to improve upon these disadvantages. Also, a two-state and three---state Kalman filter are considered for the symmetrical components estimatin of voltages and currents respectively. It is presented an efficient digital distance relaying techniques for the purpose of extracting fundamental frequency component. Also, to confirm the validity of Kalman filtering techniques, it is shown the experimental results obtained by using the digital simulation of power system. And, it is discussed the extracted results of fundamental frequency components by means of the Fourier transform and Kalman filtering techniques.
申明徹 안성산업대학교 1978 論文集 Vol.10 No.-
畓 多年生 雜草防除를 위하여 除草劑의 使用體系를 檢討코자 後期 除草劑로 Bentazon, Saturn-S, Avirosan, Bentazon 混劑등과 前期 除草劑로 Machete의 10종을 供試하여 檢討한 結果 가. Saturn-S fb Bentazon 處理가 가장 殺草力이 컸으나 藥害가 發生하였다. 나. 벼 生育에 지장이 없으면서 殺草力이 廣範圍한 除草劑使用體系는 MT-B-3015 fb Bentazon, Machete fb Bentazon이었다. 다. 後期除草劑로 Saturn-S를 처리할 경우에는 Bentazon 處理보다 殺草力도 떨어질 뿐만아니라 藥害發生이 심하였다. In order to investigate System of Perennial weed control in paddy fields, I used 11 different herbicides as former herbicides and Bentazon, Saturn-S, Avirosan, the mixture of Bentazon were used as latter herbicides. The results obtained were summarized as follows; 1. Saturn-S fb Bentazon treatment showed the strongest weeding activity, but caused injury to paddy field rice. 2. MT-B-3015 fb Bentazon, Machete fb Bentazon were recommendable for system of weed control with wide weeding activity. 3. In case of Saturn-S treatment as latter herbicides, weeding activity of Saturn-S was inferior to that of Bentazon treatment and Saturn-S treatment caused heavy injury to paddy field rice.
전력계통의 실시간 대칭성분 계산을 위한 알고리즘에 관한 연구
신명철,이복구,성낙환 成均館大學校 科學技術硏究所 1987 論文集 Vol.38 No.1
Nowadays as the power systems have been more complicated and have grown to ultra high voltage, it requires an accurate and high speed relaying scheme to improve the reliablity and stability of power systems for a harmonious power supplying. This paper presents a real-time algorithm for calculating symmetrical components from the distorted transient voltage and current signals in a power system. To compute the sequence components and hence to analyze the nature of the disturbance it is necessary to extract the fundamental frequency signals from the noise-ridden transient signals. The fundamental frequency components are filtered out from the transient signals using discrete Fourier technique. The fundamental frequency components of the 3-phase signals are first extracted using an algorithm based on discrete Fourier transformation and then real-time symmetrical components transformation is applied to obtain the sequence components. The algorithm presented is computationally efficient and fast. Experiment results on artificial transmission line demonstrate the validity of the proposed algorithm.
申明徹 안성산업대학교 1976 論文集 Vol.8 No.-
豆類에 대해서 14種의 藥劑를 사용하여 砂壤土 條件에서 抵抗性 檢定을 實施한 바 그 結果를 要約하면 다음과 같다. 1. 土壤表面 및 根部處理 結果 가. 콩에 대하여 高度의 選擇性을 나타낸 藥劑는 TOK, MO, HE-314, Machete, Lasso, Bladex, Saturn 등이었다. 나. 팥에 대하여 選擇性을 나타낸 藥劑는 HE-314, Machete, Lasso, Tribunil, Herban 등이었다. 2. 莖葉處理 結果 豆類에 安全한 葉劑는 Machete, Lasso 이었다. In order to determine selective herbicides which control weeds effectively but give little injury to corps. I used l4 different herbicides to test tolerence of beans is condition of sandy loam. The results were summarized as follows; 1. In soil surface and root zone application Tok Mo, HE-314, Machete Lasso, Bladex and Saturn showed high selectivity for soy bedn. HE-314, Machete, Lasso, Tribunil and Herban showed selectivity for small red bean. 2. In foliage application. Machete and Lasso were recommendable for beans.