http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
마이크로 컴퓨터를 활용한 수학 교수 , 학습법 개발에 관한 연구
김창동,이태욱 ( C . D . Kim,T . W . Lee ) 한국수학교육학회 1988 수학교육 Vol.27 No.1
We are at the onset of a major revolution in education, a revolution unparalleled since the invention of the printing press. The computer will be the instrument of this revolution. Computers and computer application are everywhere these days. Everyone can`t avoid the influence of the computer in today`s world. The computer is no longer a magical, unfamiliar tool that is used only by researchers or scholars or scientists. The computer helps us do our jobs and even routine tasks more effectively and efficiently. More importantly, it gives us power never before available to solve complex problems. Mathematics instruction in secondary schools is frequently perceived to be more a amendable to the use of computers than are other areas of the school curriculum. This is based on the perception of mathematics as a subject with clearly defined objectives and outcomes that can be reliably measured by devices readily at hand or easily constructed by teachers or researchers. Because of this reason, the first large-scale computerized curriculum projects were in mathematics, and the first educational computer games were mathematics games. And now, the entire mathematics curriculum appears to be the first of the traditional school curriculum areas to be undergoing substantial trasformation because of computers. Recently, many research-Institutes of our country are going to study on computers in orders to use it in mathematics education, but the study is still starting-step. In order to keep abreast of this trend necessity, and to enhance mathematics teaching/learning which is instructed lecture-based teaching/learning at the present time, this study aims to develop/present practical method of computer-using. This is devided into three methods. 1. Programming teaching/learning method This part is presented the following five types which can teach/learn the mathematical concepts and principle through concise program. (Type 1) Complete a program. (Type 2) Know the given program`s content and predict the output. (Type 3) Write a program of the given flow-chart and solve the problem. (Type 4) Make an inference from an error message, find errors and correct them. (Type 5) Investigate complex mathematical fact through program and annotate a program. 2. Problem-solving teaching/learning method solving This part is illustrated how a computer can be used as a tool to help students solve realistic mathematical problems while simultaneously reinforcing their understanding of problem-solving processes. Here, four different problems are presented. For each problem, a four-stage problem-solving model of polya is given : Problem statement, Problem analysis, Computer program, and Looking back/Looking ahead. 3. CAI program teaching/learning method This part is developed/presented courseware of sine theorem section (Mathematics I for high school) in order to avail individualized learning or interactive learning with teacher. (Appendix I, II)
고석조(S. J. Go),이병우(B. W. Lee),김창동(C. D. Kim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
There are an electronic and a manual type in Bidet. The electronic bidet has some advantages. It supplies multiple functions and is set up easily. However, it has frequent defects and a high price. The manual bidet is not need to supply electric and is cheaper than the electronic type. However, it is needed to supply hot water and is hard to set up. In order to solve these defects, this study designed a bidet heating unit using an electric instantaneous water heating method. To get a proper heating elements, experiments were performed about a Ni-Cr heater and a film heater.
쇠뜨기(Equisetum arvense L .) 分劃의 抗突然變異性에 관한 硏究
김미정,이재호,강정혜,정규찬,정주섭,정규생,김창동 영남대학교 약품개발연구소 1994 영남대학교 약품개발연구소 연구업적집 Vol.4 No.-
This study is to investigate the antimutagenicity of Equisetum arvense L. The sterile stems of Equisetum arvense L. were extracted with methanol and the extract was treated sucessively using with hexane, chloroform and ethylacetate. By Ames test with Salmonella typhimurium strain, it showed that these fractions had antimutagenicity activity in TA 98 treated by NPD as well as TA 100 by NaN₃ suggesting that this activity is due to the flame shift and the base pair exchange. EtoAc fraction was the most potent. In the comparative study of inhibition for microsomal lipid peroxidation by each fractions, EtoAc fraction has inhibited lipid peroxidation most strongly. Also EtoAc fraction has been highly flavonoid contents. This effect was correlated with flavonoid contents of each fraction.