• Journal of the Korean Chemical Society
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• v.60 no.5
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• pp.362-373
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• 2016

In this study, ionic compound in the science textbooks developed under the 2009 revised national curriculum were analyzed in terms of the scientific concept and model description and the student understanding through the questionnaires. Analysis of textbooks was performed for science2 of middle school and chemistry I & II of high school. Questionnaire was carried out with 194 students including middle school 2nd grade and high school 1st-3rd grade. The results are as follows: First, as a result of analysis of textbooks, scientific concepts and models used to explain the ionic compound showed differences depending on the types of textbooks. In addition, scientific models were provided with or without explanation for the scientific concepts. Second, analysis of the questionnaire showed that students didn’t properly understood scientific concepts and models in the ion formation, stoichiometric ratio between ions.

• Journal of Korean Classical Literature and Education
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• no.32
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• pp.63-118
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• 2016

The purpose of this study is to examine the change in literary materials in secondary school Korean textbooks and literature textbooks as per the 2009 revised curriculum. Literary materials in secondary school Korean textbooks have increased student awareness of literary canons because these have been taught and learned through public education. Seodongyo, Gemangmega, and Gasiri in classical poetry and the tale of Heungbu, Pongsan Mask Dance, the Tale of Ch'unhyang and the tale of Honggildong(by Heo Gyun) in classical prose are published in secondary school Korean textbooks and literature textbooks as per the revised curriculum of 2009. A three-verse Korean ode and a classical novel are the most chosen genres in classical literature.

• The Journal of the Korea Contents Association
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• v.11 no.6
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• pp.176-184
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• 2011

The purpose of this study is to analyze the Korean War photographs in Korean history textbooks. This paper deals with the ways of describing Korean War in history textbooks. The Korean War photographs adopted in this study, using qualitative and quantitative analysis. The photographs analyzed for this study were in the 6 different textbooks in high school level. This paper focuses on how photographs of the textbooks help students create various memories about Korea War. The photographs of the textbooks, before the 7th Educational Process, decribe Korean War as victorious war. Meanwhile, the Korean War photographs in Korean modern and contemporary history textbook emphasize traumas of the war.

• Journal of the Korean Chemical Society
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• v.50 no.2
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• pp.163-177
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• 2006

Alpha Nickel hydroxide samples have been synthesized by electrodeposition on platinum and nickel substrates at current densities of 1, 5, 6, 7 and 10 mAcm？2 at a controlled temperature of 30.00 oC from Ni(NO3)2 bath. Platinum substrate shows a tendency to incorporate less nitrate ions with increase in current density thus producing less hydroxy-deficient nickel hydroxide layers. On the whole the interlayer distance (d003) is found to be inversely proportional to the amount of nitrate ions incorporated in-between the lattice. For the first time we have observed a decrease in lattice spacing with increase in concentration of intercalant (anions) and the reason for lattice contraction is attributed to the columbic attractive forces exerted by the oppositely charged nitrate ion and positively charged slabs. The Infrared spectra of the samples with expanded interlayers show two types of OH vibrations corresponding to hydrogen bonded and non-hydrogen bonded OH groups whereas the contracted interlayers show only hydrogen-boded OH groups. Although the faradaic efficiency is found to increase with increase in applied current there is a local minimum at 6.0 mAcm？2 current density on both platinum and nickel substrates. In this manuscript, GC-MS data is provided which clearly demonstrates the electrodeposited nickel hydroxide sample to consist of huge amount of carbonate ions although the electrolyte solution in nickel nitrate.