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조영주(Yeong-Ju Cho),김동오(Dong-Oh Kim),김동수(Dong-Soo Kim),한기준(Ki-Joon Han) 한국IT서비스학회 2012 한국IT서비스학회지 Vol.11 No.2
The construction of the Geographical Information System(GIS) is continuously in progress, and with the diversification and complication of the system, the importance of its audit is further deepened. At this point in time, the information system audit has been obligatory as it has been stipulated in law, and the GIS audit has come to follow the criterion of the information system audit since it belongs to the information system audit category. However, it was found that there was a difference between the current information system audit standard and the former GIS audit standard, and the audit checking items for the efficient GIS audit is necessary. For this reason, this paper surveyed the characteristics of GIS in accordance with this necessity, analyzed the GIS audit checking items found in the audit performance guideline of the GIS audit standard, and studied the GIS development methodology through the related literature. In addition, this paper also elicited and proposed the audit checking items for the efficient GIS audit based on the findings of this paper. Finally, this paper confirmed the efficiency of the GIS audit checking items proposed here through the comparison of the actual cases of GIS audits.
컴퓨터 대수 환경에서 매개변수 개념에 대한 고등학생의 이해에 관한 사례 연구
조영주 ( Yeong Ju Cho ),김경미 ( Kyung Mi Kim ) 한국수학교육학회 2010 수학교육논문집 Vol.24 No.4
본 연구의 목적은 고등학생 6명을 대상으로 교수실험을 통해 컴퓨터 대수 환경에서 매개변수 개념에 대한 학생들의 이해 과정에서 나타난 특징들을 알아보는 것이다. 본 연구에서는 Drijvers(2003)의 매개변수 개념의 구분에 따라 매개변수 개념을 "자리지기로서의 매개변수", "변하는 양으로서의 매개변수", "미지수로서의 매개변수", "일반화로서의 매개변수"로 세분화하여 컴퓨터 대수 환경에서 각 매개변수 개념에 대한 학생들의 이해의 특징을 조사하고, 컴퓨터 대수 환경이 각 매개변수의 개념 이해에 어떠한 역할을 하는지에 대하 알아보았다. The purpose of the study was to investigate how students` understanding was formed for solving the algebra problems involving parameters in a computer algebra environment. The teaching experiment has been conducted with 6 high school students. As a result, students studied the parameter in different roles such as placeholder, changing quantity, unknown and generalizer. The results indicate that a computer algebra environment offers opportunities for algebra activities that may support the development of understanding of the concept of parameter.
CAS 어플리케이션을 이용한 χn-1의 인수분해 일반화 과정에 대한 질적 분석
조영주 ( Yeong Ju Cho ),김경미 ( Kyung Mi Kim ),황우형 ( Woo Hyung Whang ) 한국수학교육학회 2013 수학교육 Vol.52 No.3
The purpose of the study was to investigate how students generalize and prove the factoring of using a Computer Algebra System application and the role of CAS in this process. The theoretical framework consists of the anthropological and the instrumental approach. In particular, the basis of the Task-Technique-Theorization(T-T-T) frame adapted form Chevallard`s anthropological approach of Didactics is utilized. We found that Technique-Theorization emerges in mutual interaction between paper-and-pencil techniques and computer algebra techniques. And this interaction led to the students` theoretical reflection and conceptual understanding. In this process, we could identify three epistemic role of CAS : the role of checking the result, the role of cognitive stimulation and the role of extending thinking. Therefore CAS plays on a epistemic role of checking the result of a task, stimulating the student` cognition and extending their thinking as well as pragmatic role of producing the result of a input.