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한국(韓國) 장군광산(將軍鑛山)의 황석석(黃錫石)에 대(對)하여 -장군(將軍) 연(鉛)·아연(亞鉛)·은(銀) 광석광물(鑛石鑛物)의 지식(知識)에의 기여(寄與) (3)-
이현구,이마이 나오야,Lee, Hyun Koo,Imai, Naoya 대한자원환경지질학회 1986 자원환경지질 Vol.19 No.no.spc
In the Janggun mine, stannite occurs as anhedral grains, up to 500 micrometer in long dimension, closely associated with sphalerite, chalcopyrite, arsenopyrite, pyrrhotite, galena and rhodochrosite in the periphery of the South ore body. In reflected light, stannite is grayish yellow green in color and exhibits moderate bireflectance and strong anisotropism without any intenal reflections. Reflection; Rmax. =29.0, Rmin. =27.8 percent at a wavelength of 560nm, and VHN; 219~244kg/mm at a 50g load. The chemical composition on the average from 35 spot analyses by electron microprobe is, Cu 28.0, Fe 12.7, Zn 2.9, Mn 0.2, Sn 25.8, S 30.3, sum 99.9 (all in weight percent); the corresponding chemical formula as calculated on the basis of total atoms=8 is, Cu 1.88 Fe 0.97 Zn 0.19 Mn 0.02 Sn 0.93 S 4.01, which fulfills approximately the ideal formula of $Cu_2FeSnS_4$. The strongest reflections on the X-ray diffraction patterns are; $3.10{\AA}$ (10) (112), $2.72{\AA}$ (5) (020, 004), $1.922{\AA}$ (5) (024), $1.642{\AA}$ (3) (132), $1.244{\AA}$ (3) (143, 136, 235), $1.111{\AA}$(3) (244), $0.958{\AA}$ (1) (048, 422), the patterns are identical with those of literature. From the textural evidence of the microscopic observation, the mineral is considered to have been formed at the middle stage of hydrothermal lead-zinc-silver mineralization.
Fostering Users of Intercultural English Language in the World Englishes Framework: What to Know
이현구,이노신,이강영 한국영어어문교육학회 2015 영어어문교육 Vol.21 No.3
This paper aims to claim that intercultural English language (IcEL) instruction contribute to the development of teaching to be ‘interculturally multidialectical English users’ in the world Englishes context and, thus, need to be listed in the contemporary English language teaching (ELT) curriculum. This is mainly because the English language has become ‘a heterogeneous language with multiple norms and grammars’ (cf., Canagarajah, 2006) and no longer considered to be an international language but as ‘intercultural language’ (Sifakis, 2004). And thetraditional ELT paradigm “is being challenged in the 21st century by emerging and evolving paradigms (ie., world Englishes/English as an lingua franca)” (Pakir, 2009, p. 226). For this, the present study first addresses the world Englishes framework gravitating around the many recent models of English that provides a nourishing condition for IcEL. Then it goes on to provide what IcEL isand how to teach IcEL. At the end, it suggests some critical considerations that teachers who are willing to teach IcEL should take in his/her classroom.
전기기관차 고장사례를 통한 인쇄회로기판 품질향상 방안 고찰
이현구 대한전기학회 2023 전기학회논문지 Vol.72 No.10
PCB production plants in domestic and foreign automobiles and semiconductor parts industries have their own reliability TEST centers to conduct regular tests. In this way, it is necessary to review the operation of an electronic device analysis center equipped with at least equipment for reliability analysis and measurement, such as surface insulation resistance(SIR) measuring devices, constant temperature and humidity equipment, vibration test equipment, and X-Ray equipment.. This should involve efforts to secure device-related original technologies like advanced overseas railway operators by professionally training technicians with device H/W and especially S/W design skills and creating technical communication channels with field maintenance practitioners. Through this, it is necessary to use it as an opportunity to create a foundation for leading technologies in related industries as the best railway operating institution in Korea.
소규모 집단 활동을 통한 학습자 중심의 열린 영어독해지도
이현구 국제언어인문학회 2005 인문언어 Vol.7 No.-
This study aims to analyze problems of teaching English reading based on a teacher-centered approach and to apply a learner-centered approach through small group activity to teaching English reading for improving a learner’s satisfaction and maximizing learning effectiveness. Our traditional English education had focused on a Grammar-translation method and a Reading method for reading and grammar for a long time. But the methods had been criticized a lot because of lack of English speaking and listening ability. Therefore, a communicative approach was introduced and we have emphasized on speaking and listening ever since. But these days we need an English reading ability again in order to read lots of information and gather them through an Internet and materials. As a result, we need a new approach of teaching English reading, and we need to develop and improve it. This study will contribute to the approach to be able to improve a learner’s English reading in EFL.