• The Journal of Korean Association of Computer Education
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• v.22 no.1
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• pp.21-30
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• 2019

In this research, there is a purpose to develop an informatics education curriculum of the general level that the preliminary teacher at elementary school prepares for information education. First of all, in order to achieve the purpose, we compare and analyze the standard CS 2013 of the educational curriculum of elementary school teacher training university, University-Level Program cooperation deepening course, higher education course, and prepared content and level. Secondly, subjects were structured in consideration of standard J07-GE analysis of higher education curriculum and cooperation with secondary education course. Third, subject names were determined by examination by experts, taking into consideration the scope of subjects, content system composition, etc. Computer Science II, Computer Science II, Data Management in the domain to understand the basic principles of Computer Science I, Computing System, in order to approach expert opinions, analysis results, problems arising in information society from the viewpoint of computer science We proposed data management and analysis to grasp the patterns and relationships involved. In this research, not only improving ability to solve problems based on the basic capacity strengthening of teachers but also presenting subjects of general level, considering continuity star of high school information subjects it makes sense.

• The Journal of Korean Association of Computer Education
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• v.21 no.4
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• pp.29-37
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• 2018

In this paper, questions from the last three years' appointment examinations for secondary teachers for informatics computer subjects are classified in a way to fit thirteen basic mandatory courses, for which the composition of scores and the number of questions tested were examined. Of these thirteen basic mandatory courses, questions from six basic mandatory courses with high frequency of assessment were analyzed on their score composition based on the evaluation area. In addition, questions testing knowledge in C language were analyzed separately. The results show scores for the curriculum content subjects ranged from 0% to 17.1%, and the ratio of questions tested from curriculum content subjects 0% to 15.8%. In addition, questions from three courses showed a large deviation in scores for each year. Second, the score composition based on the evaluation area showed a large discrepancy, ranging from 0% to 52.0%. Lastly, the questions tested on the C language exhibited high score on average at 33%. Based on the results from the analysis, this study proposed plans to improve ways to evaluate test takers' aptitude.

• The Journal of Korean Association of Computer Education
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• v.22 no.6
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• pp.35-42
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• 2019

The purpose of this study is to investigate secondary school teacher's perceptions and needs of computer and information literacy(CIL) convergence education and to suggest implications for promoting CIL convergence education in the actual school fields. We conducted a survey on teachers perceptions and the needs for CIL convergence education and analysed 227 secondary school teachers responses. As a result, we found that the perception of the necessity of CIL convergence education was very high while understanding level of the CIL convergence education and the actual frequency of teaching experiences were relatively low. In addition, CIL convergence education activities are mainly conducted through Informatics curriculum rather than various subjects. We identified that the main constrains of CIL convergence education were the burden on the progress of subject based curriculum as well as the lacking of teaching and learning equipments including computers. We identified that the needs for empowering teachers professional developments and constructing the physical and institutional environments of school sites were high. In discussion, we suggested the support strategies in terms of teacher professional development, institutional supports, and physical environments.

• Journal of applied mathematics & informatics
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• v.25 no.1_2
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• pp.231-244
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• 2007

In this paper, we use measure theory for considering asymptotically stable of an autonomous system [1] of first order nonlinear ordinary differential equations(ODE's). First, we define a nonlinear infinite-horizon optimal control problem related to the ODE. Then, by a suitable change of variable, we transform the problem to a finite-horizon nonlinear optimal control problem. Then, the problem is modified into one consisting of the minimization of a linear functional over a set of positive Radon measures. The optimal measure is approximated by a finite combination of atomic measures and the problem converted to a finite-dimensional linear programming problem. The solution to this linear programming problem is used to find a piecewise-constant control, and by using the approximated control signals, we obtain the approximate trajectories and the error functional related to it. Finally the approximated trajectories and error functional is used to for considering asymptotically stable of the original problem.

• Journal of applied mathematics & informatics
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• v.32 no.5_6
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• pp.721-736
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• 2014

We consider the equation ${\Delta}_mu=p(x)u^{\alpha}+q(x)u^{\beta}$ on $R^N(N{\geq}2)$, where p, q are nonnegative continuous functions and 0 < ${\alpha}{\leq}{\beta}$. Under several hypotheses on p(x) and q(x), we obtain existence and nonexistence of blow-up solutions both for the superlinear and sublinear cases. Existence and nonexistence of entire bounded solutions are established as well.

• Journal of applied mathematics & informatics
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• v.9 no.2
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• pp.717-730
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• 2002

In this paper we use measure theory to solve a wide range of the nonlinear programming problems. First, we transform a nonlinear programming problem to a classical optimal control problem with no restriction on states and controls. The new problem is modified into one consisting of the minimization of a special linear functional over a set of Radon measures; then we obtain an optimal measure corresponding to functional problem which is then approximated by a finite combination of atomic measures and the problem converted approximately to a finite-dimensional linear programming. Then by the solution of the linear programming problem we obtain the approximate optimal control and then, by the solution of the latter problem we obtain an approximate solution for the original problem. Furthermore, we obtain the path from the initial point to the admissible solution.

• Journal of applied mathematics & informatics
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• v.26 no.5_6
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• pp.1169-1183
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• 2008

In this paper, a method to find the weighted possibilistic variance and moments about the mean value of fuzzy numbers via applying a difuzzification using minimizer of the weighted distance between two fuzzy numbers is introduced. In this way, we obtain the nearest weighted point with respect to a fuzzy number, this main result is a new and interesting alternative justification to define of weighted mean of a fuzzy number. Considering this point and the weighted distance quantity, we introduce the weighted possibilistic mean (WPM) value and the weighted possibilistic variance(WPV) of fuzzy numbers. This paper shows that WPM is the nearest weighted point to fuzzy number and the WPV of fuzzy number is preserved more properties of variance in probability theory so that it can simply introduce the possibilistic moments about the mean of fuzzy numbers without problem. The moments of fuzzy numbers play an important role to estimate of parameters, skewness, kurtosis in many of fuzzy times series models.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.07a
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• pp.133-135
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• 2015

본 연구에서는 현재와 미래사회의 핵심역량이 될 컴퓨팅 사고력을 학생들에게 가르치기 위한 정보 교사의 교수내용지식에 어떠한 특성이 있는지를 탐구하였다. 이전의 컴퓨터 교과는 일상적인 컴퓨터 기능을 가르치는데 집중하여 교사의 교수내용지식도 기능 전수에 큰 목적을 두고 있었다. 새로이 개정된 정보 교과는 컴퓨터 과학의 원리와 개념에 대해 학생들이 이해할 수 있는 교육방법에 대한 지식을 가져야 하고, 소프트웨어의 활용 및 소프트웨어 제작에 대한 능력과 교육 방법 또한 함께 가지고 있어야 한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.07a
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• pp.203-204
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• 2019

본 연구의 목적은 예비 교사의 소프트웨어 교육 수업 전문성 함양을 위하여 백워드 설계 기반으로 교육프로그램을 개발하는 데 있다. 백워드 설계는 학생들의 심층적인 이해를 고려한 수업 설계 기법이다. 백워드 설계 대한 이론적 배경을 바탕으로 차시 당 4시간 수업으로 총 8차시(32시간 분량)의 소프트웨어 교육 프로그램을 개발하였다. 이는 예비교사의 소프트웨어 교육에 대한 심층적인 이해를 돕고, 직접 백워드 설계를 기반으로 하는 수업 계획을 실습함으로써 교육과정에 대한 깊은 이해도 도울 수 있다는 점에 의의를 갖는다. 하지만 본 연구에서 개발된 교육 프로그램이 어떤 효과성을 지니는지에 대한 검증이 이루어지지 않았다는 제한점이 있다. 따라서 추후 연구에서는 효과성을 확인하기 위한 실험 및 통계적 검증이 요구된다.

• The Journal of Korean Association of Computer Education
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• v.22 no.3
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• pp.113-121
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• 2019

The purpose of this study is to develop TPACK-P teachers' training program based on backward design included understanding of backward design principles in order to enhance teachers' professionalism of software education and informatics education. This teachers' training program was conducted for non-informatics teachers in 32 hours. As a results, teachers showed that post-test result of SE-TEBI was higher than pre-test and the t-test results showed that the total value of SE-TE was t=-3.541(p< .01), subscale PSETE was t=-3.559( p< .01) and SEOE was t=-2.258(p< .05). Therefore, we demonstrate that it helps improve the teaching professionalism of teachers. However, as a result of the test, teachers' PSETE tend to be lower in SEOE, which is interpreted as a lack of confidence in the lessons. Therefore, in further study, it is necessary to develop a teacher education program that can promote the confidence of teachers.