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임춘우,박윤배 韓國英才學會 2010 영재교육연구 Vol.20 No.1
본 연구는 영재선발도구로서 지필 검사 문항의 적합성에 대한 검토를 위해 과학영재 교육원 중학교 물리 전공 학생 선발에 지난 3년간 사용된 문항들을 대상으로 문항 분석을 하여, 새로운 전형방식에 주는 교훈을 얻기 위하여 실시되었다. 분석결과, 객관형 문항의 평균 문항 난이도와 변별도는 대체로 양호한 편이었으나, 교과 및 내용별로 차이가 많은 것으로 나타났다. 서술형 문항이 객관형 문항에 비해 어렵게 출제되었으며, 변별력이 높았던 것으로 분석되었다. 특정 문항들과 총점과의 상관관계에서 객관형 문항의 경우는 수학과 물리, 화학 문항들과, 과학영재성 및 창 의성 문항들에서 가장 높은 상관이 나왔으며, 서술형 문항이 객관형 문항보다 총점과 의 상관이 더 높은 것으로 분석되었다. 선발 시험에 응시한 학생들 가운데서 다른 영 재교육기관에서 영재교육을 받은 학생과 그렇지 않은 학생들의 차이를 t 검증으로 분 석한 결과, 영재교육을 받은 적이 있는 학생들의 총점 평균이 유의미하게 높은 것으 로 나타났다. 그러나 서술형 문항에서는 두 집단 간에 유의미한 차이가 없었다.
임춘우,송기국,Sung Hyun Kim 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.1
A simple fabrication method for a polypyrrole (PPy)/silica nanocomposite with a cratered surface using templated synthesis is described. This nanocomposite was prepared by a modified silica-templated oxidation/polymerization of pyrrole in the presence of FeCl3 oxidant and was characterized by various methods, including Fourier-transform infrared spectroscopy; BET specific surface area; and transmission electron microscopy (TEM). The PPy/silica nanocomposite with surface craters looked like a golf ball in TEM images. The highest BET surface area of PPy/silica nanocomposite with craters was 306 m2/g at 4 mL silica sol solution (Ludox SM-30) loading through the fabrication process, whereas a PPy/silica nanocomposite without craters had a specific surface area of only 85 m2/g with no Ludox SM-30introduced. In addition, the material’s adsorption capacity for heavy metal ions (Hg2+, Ag+, and Pb2+) and its recycling mechanism were investigated.
비만증(肥滿症)과 간기능(肝機能) 이상(異常)을 동반(同伴)한 환자(患者) 11례(例)에 대한 임상적(臨床的) 고찰(考察)
임춘우,김경훈,박영준,박주한,윤보현,Lim, Choon-Woo,Kim, Kyung-Hoon,Park, Young-Jun,Park, Jou-Han,Yun, Bo-Hyeon 대한한방내과학회 2001 大韓韓方內科學會誌 Vol.22 No.4
Objectives: Obesity is regarded as the aggregation of needless risk factors, for instance, cardiovascular disease, joint disease, induce cancer. We studied on interrelation between abnormal liver function and obesity. Methods: We analyzed liver function, T.Cholesterol, Triglyceride before and after lose weight treatment. The collateral condition is over 6 weeks period on obesity treatment, no liver injury and no complicated another disease on personal past history and found out abnormal impression on biochemical liver function blood test. Results: The improvement rate of LFT, compare with before treatment is 10.6% in T.Bilirubin, 11.1% in ALP, 21% in AST, 38% in ALT, 37.3% in r-GTP, 9.2% in LDH and decreased 2.7% in T.Protein, increased 2.3% in Albumin. Hyperlipidemia is 19.4% in T.Cholesterol, 42.5% in Triglyceride. Conclusions: LFT and Hyperlipidemia of abnormal liver function patients, caused by obesity, is improved to normal limit in proportion to reduce patient's weight.
초부가성 효과에 의한 반전표백 홀로그래피 회절격자의 회절효율 특성
임춘우,Lim, Chun-Woo 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.5
This paper shows that the diffraction efficiency is influenced by superadditivity for the combination of the different developing agent and concentrations in the reversal bleach applied to the Slavich PFG-01 plate to be used for recording transmission holograms. The four developers based on ascorbic acid in combination with metol, phenidone, hydroquinone respectively, were studied. In diffraction efficiency aspect, the superadditivity effect of mixture of two developing agents is lower than one developing agent developer, AAC in the reversal bleach.
Slavich PFG-01을 이용한 투과형 홀로그래피 회절격자의 제작 및 표백액 성분에 따른 회절 효율 특성 연구
임춘우,박성진,최대욱,석성수,오철한 慶北大學校 師範大學 科學敎育硏究所 2001 科學敎育硏究誌 Vol.25 No.-
Bleaching is one of the most popularly used techniques in the production phase holograms with high diffraction efficiencies on silver-halide emulsion. Since Agfa silver-halide holographic plate has ceased production, it is necessary to study on the Slavich material to find the holography processing conditions and characteristics of diffraction grating. In this paper, the highest values of diffraction efficiency using three different components of the bleach solution with transmission hologram recording Slavich PFG-01 have been studied. The peak diffraction efficiency can be obtained, as high as 86% when using a bleach with potassium bromide. The influence of potassium bromide in the bleach solution on the final quality of the holograms was also studied.