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정완호,권용주,김영신,봉회근 韓國生物敎育學會 1994 생물교육 Vol.22 No.1
Not only in science but also in all subjects, the management of high school curriculum in Korea is received the influence of National Testing for the University Entrance Examination, And this influence has more negative aspects than positive ones. In this view point, this study is to analyze the domains of content, behavior, and context, find out the controversial problems, and make some suggestions for the improvement of the National Testing for the University Entrance Examination. The materials of this study are consist of 372 items in the National Testing for the University Entrance Examination from 1969 to 1992. The tool of this analysis is the $quot;three-dimensional analysis tool of science education$quot; which was set up for this study by means of correcting the fifth NAEP Assessment Frame (NAEP, 1984). To keep the validity of study, $quot;the objectivity of the analysis$quot; was measured before the analysis, and the measured objectivity index of analysits is 90.8% According to the result of this analysis, in the domain of content many items have been set eon the area of $quot;development and genetics$quot; and $quot;structures and functions of organs$quot; and the area of $quot;ecology$quot; is increasing its importance. In the domain of behavior, the items about the knowledge and comprehension covered 70.7% and the items about the science process took only 8.3% in spite of the emphasis in the science curriculum. The domain of value and responsibility of biological science hasn't been treated in the items. This analysis shows the fact that the National Testing for the University Entrance Examination have an influence on the way of the normal management of the curriculum and the achievement of educational objective. In the domain of context, the items of National Testing for the University Entrance Examination pay no attention to the area of context such as technological, social, and individual context. This will lead the science education in high school to ignore important educational function of the problem-solving learning and decision-making and this will inevitably result in the danger of cultivating scientifically illiterate people. On the basis of these analysis, when the National Testing for the and University Entrance Examination is taken into consideration on the aspect of its influence on the high-school curriculum, it should take the following into consideration. First, in the domain of content, it should focus on both the application of the area of bioecological aspect such as 'environmental biology'. 'conservation biology', 'behavioral biology' and the area of technogical aspect such as 'cell biology', 'molecular biology', 'microbiology'. Second, in the domain of behavior, scientific process, the value of science, and the application of science in the technological and social aspects should be considered. Third, in the domain of context, the items about the technological, social, and individual context should be treated. Finally, besides all these suggestions, the introduction of the system for previous problem analysis, the consideration study on the validity, difficulty, and discrimination should be conducted.
정완호,최진복,차희영 韓國生物敎育學會 1994 생물교육 Vol.22 No.1
Since the research findings about ecological misconception of korean pupils have not represented until now, the primary purpose of this research was to identify high school students' misconceptions on ecology, At first, in order to find out high school students' misconceptions on ecology, a free-answer form of questionnaire, specially designed through analysis of high school biology curriculum, particularly ecological content, was developed and sent to ninety five high school students who had lived in Chungju area. Their responses were collected and analyzed qualitatively. As the results of the analysis of the data, the summary of this research are as follows. 1. High school students have remembered at the point of ecological terminology or simple knowledge than understood dynamic relations among ecosystem about ecology, These results were same with foreign pupils'. 2. They confused the output of plant respiration to oxygen. Especially, they recognized that invisible microorganisms, example far zoo plankton or fungi, didn't do gas exchange. 3. Although many students usually misundertood that bacteria is toxic organism, they thought correctly the bacteria in ecosystem as decomposer was not toxic. 4. There were several misconceptions arose from biological terminology such as red blooming, red algae and winter migratory birds.
정완호,차희영,이재인 韓國生物敎育學會 1994 생물교육 Vol.22 No.1
This research was one part of the whale .research which have been designed far the purpose of investigating korean high school students' misconceptions on biology. As previously reported by Chung et al.(1992), korean biology teachers stated that korean students had many biological misconceptions. The previous study was a pilot study of this study. This study was to identify high school students' misconceptions about reproduction and development of organism. For this study, a free-answer form questionnaire consisted of twenty-one items, was specially developed through analysis of high school biology curriculum shout reproduction and development, developed and sent to fifty four high school students lived in Seoul. Their responses were collected and analyzed qualitatively. The results of the analysis of the students' responses will be used essential data for the following questionnaire development.
류완호,이원묵,홍필선,양천희,안재영,백일현,이병노 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.5
석탄회를 이용, 중금속 제거용 흡착제 제조를 목적으로 NaOH를 반응물로 한 수열합성 반응으로 제올라이트를 합성하였으며, 이에 대한 성능특성 및 중금속 흡착실험을 수행하였다. SiO₂와 Al₂O₃를 주성분으로 한 석탄회를 NaOH에 의한 수열합성 반응으로 폐수 중에 포함되어 있는 중금속에 대한 제거능력이 높은 제올라이트를 합성하고자 하였다. 따라서 NaOH 농도, 시간을 변화시키면서 제올라이트를 합성하여 실험한 결과 4 M-NaOH, 4시간에서 최적의 조업조건을 얻을 수 있었다. 산에 의한 전처리 과정을 거친 합성 제올라이트는 pH 7-9.5로 중성을 나타내었다. 또한 산처리 합성 제올라이트를 이용하여 중금속인 P, Pb, Cd, Cr, Mn등의 흡착능을 비교한 결과 P, Pb, Cd 등은 비교적 흡착능이 우수하게 나타났지만 Cr과 Mn 등은 pH가 너무 높기 때문에 거의 흡착이 이루어지지 않았다. Zeolite was synthesized from coal fly ash produced by a domestic power plant and has applications in the removal of heavy metal from waste water. Zeolite was synthesized using a hydrothermal method involving an alkaline reaction with NaOH. The NaOH concentration and reaction times were varied in order to synthesize zeolite showing the maximum removal efficiency of heavy metal from waste water. The synthesis conditions were optimized at the concentration of 4M-NaOH and the reaction time of 4hn. The synthesized zeolite needed washing with HCI solution to improve the removal efficiency of P, Pb. Cd. Cr. Mn and it was maximized at pH 7-9.5 in leaching solution of synthesized zeolite.