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최병혁,정진희,김진영,김한석,김명숙,최호은,성낙창 동아대학교 환경문제연구소 2008 硏究報告 Vol.30 No.1
The exhausted coffee is a kind of biomass resources. In this study Activated carbon was prepared from ex.hausted coffee by activation with potassium Hydroxide. Processes of this study were as following : rosting step and carbonizaton step and chemical activation step. The rostiong step was canied out at more than 300 °C. The carbonization and activation step was simultaneously caπied out at 500-700°C. The purpose of this study is to evaluate the feature and usability of activated cofee char through SEM photographs, Iodine absorbability, TGA analysis, and technical analysis. For the activated carbon produced under optimal condition, iodine adsorptivity was 774mg/g, specific surface area was foπned well. In case of making activated carbon using exhausted coffee, it is considered that it has value enough as an activated carbon.
대학수학능력시험 수리영역 1등급 학생집단의 인지능력양식에 맞는 학습전략 탐색
최병혁(Choi, Byung-hyug),남궁민상(Nam-goong, Min-sang),이현진(Lee, Hyun-jin) 한국청소년상담학회 2018 한국청소년상담학회지 Vol.3 No.1
본 연구의 목적은 대학수학능력시험 수험생을 대상으로 논리력, 작업기억력, 장기기억력, 암묵기억력과 같은 인지능력양식에 따라 선호하는 수학 학습 전략에서 차이가 나는지를 알아보는것이다. 이를 위하여 본 연구는 230명의 대학수학능력시험 수리영역 성적 우수자를 모집하였다. 인지 능력 양식을 측정하기위해 인지 능력 양식 검사지(최병혁, 2017)를 사용하였으며, 수학 학습 전략에 대한 선호도를 측정하기 위한 학습전략 척도는 본 연구자들이 개발하였다. 자료처리는 Windows용 R 3.4.3를 사용하여 카이제곱 검정을 실시했다. 연구결과를 살펴보면, 논리력에서 N개, 작업기억력에서 M개, 장기기억력에서 K개, 암묵기억력에서 L개의 학습방법과 인지능력간의 유의미한 관계가 있음을 보였다. 이 결과로부터 시험을 준비하기 위한 수학학습전략에 한정했을 때 모든 사람들에게 공통적인 학습방법을 제시하는 것은 비효율적일 수 있으며, 개인의 인지발달 특성에 맞는 학습방법을 찾는 것이 효과적임을 발견하였다. The purpose of this study is to show that the preference of mathematics learning strategies for high school students can be different according to students’ cognitive ability style such as logic, working memory, long-term memory, implicit memory. For this purpose, 230 students were examined who had excellent grade on College Scholastic Ability Test Math Section. In order to measure their cognitive ability style, Cognitive ability style test(Choi, 2017) was used, and the Learning Strategy Scale was developed to research the preferences about math learning strategies. Cross analysis process with chi-square test was conducted by means of program R 3.4.3 for Windows. The result of this study showed the relationship between cognitive ability styles of high-achievers on CSAT and their learning strategies. The result showed that there was a significant relationship about two strategies with logic, one with working memory, three with long-term memory, and two with implicit memory. The result implies that in the case of studying math for the exam, general learning strategies may be ineffective, rather personalized strategies according to cognitive ability style would be more effective.