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경강선의 평압가공성에 미치는 조직과 가공의 영향에 대한 연구
이인섭,김동훈,김원태 대한금속재료학회(대한금속학회) 1984 대한금속·재료학회지 Vol.22 No.5
Microstructure analysis and tensile test were performed to study the effects of microstructure and drawing on the flat rolling of high carbon steel wires. Critical reduction ratio in flat rolling increases due to the developed fibrous microstructure as drawing ratio increases, and is roughly proportional to the area reduction ratio in tensile test. Edge crack is formed at the angle of 45 degree to the rolling direction due to tensile stress. Critical width to thickness ratio of Stelmor treated wire is superior to that of the lead patenting treated wire. Sorbite created in the lead patenting treatment is considered to be deterious to flat rolling of wire.
이인섭 한국아랍어아랍문학회 2022 아랍어와 아랍문학 Vol.26 No.2
This study examines the morphological characteristics of Arabic vocabulary, especially how persistence can be differs depending on the part of speech or form of the word and compare how part of speech, lexical forms, and verb conjugated forms can be different on vocabulary persistence, and look at examples on the perfect form of verbs for persistence in context. Chapter 2 will describe that the verb does not mean persistence usually, but temporarily four consonant verbs with two superimposed consonants show persistence. Based on the part-of-speech, the persistence increases in the order of active participles, active participle-like adjectives, maṣdar(gerunds), and nouns. In Chapter 3, how the persistence varies depending on the derivation form of the word will be described. The researcher will examine female-only adjective whose persistence decreases when the feminine morpheme ta:marbuṭah (ة) is attached, and describe the persistence according to conjugation forms of the verb. Chapter 4 deals with how verb perfect forms express persistence in context. It will be described how persistency can be expressed with the perfect tense form of verb on eternal truth, expressions related to Allah or in prayers, present or future tense, expressions used in contracts and transactions.
이인섭,유홍선,김원배,양제복,Lee, In-Sub,Ryou, Hong-Sun,Kim, Won-Bae,Yang, Je-Bok 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.7
The main objective of the present study is to analyze the heat transfer characteristics in the vacuum carburizing furnace. Local temperatures are measured at different locations in the self-fabricated furnace for various operating conditions using K-type thermocouples. In addition, the present study simulates the fluid flows and heat transfer in the vacuum carburizing furnace using a commercial package (Fluent V. 6.0), and compares the predictions of local temperatures with experimental data. The temperature and flow fields are predicted. It is found that the time taken for reaching the steady-state temperature under the vacuum pressure is shorter than that under the normal pressure condition. It means that the carburizing furnace under vacuum pressure condition is capable of saving the required energy more efficiently than the furnace under the normal pressure condition. Furthermore, the temperature variations predicted by the numerical simulations are in good agreement with experimental data.