• Journal of Korean Elementary Science Education
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• v.27 no.3
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• pp.296-306
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• 2008

The purpose of this study was to analyze the attitudes toward science and support for scientific activities of the scientific gifted students' parents and the general students' parents in elementary school. The objects of the study were 99 scientific gifted students and their parents and 433 general elementary school students and their parents. The instruments for the measurement of attitudes toward science included three scales: cognition :About value of science, affection toward science and science learning, and cognitive participation in scientific activities. The instrument to measure parents' support for scientific activities included two scales: indirect support and direct support. The results of the study showed that the attitudes toward science of scientific gifted elementary students' parents were more positive than the attitudes toward science of general elementary students' parents. Also the gifted elementary students' parents supported many more scientific activities for their children with various methods than the general elementary students' parents. Their preferring support methods for scientific activities included 16 items including the collection of information about science education, the record of TV science programs, purchase of scientific books, subscription of periodical publication about science, preparing material for scientific activities, and reading scientific book with children.

• Journal of Korean Elementary Science Education
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• v.29 no.2
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• pp.219-232
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• 2010

In this study, we investigated and compared the types of analogy generation processes and the perceptions of analogy generation on saturated solution of fifth grade scientifically-gifted and general elementary students. After the instruction of self-generating analogies on 'saturated solution' concept for two classes, 12 scientifically-gifted and 8 general elementary students were interviewed to explore their analogy generation processes and the perceptions of the abilities required in the processes, the conditions of good analogies, and the advantages/disadvantages of analogy generation. The results revealed that their analogy generation processes were classified into three types. The scientifically-gifted students generated the analogies in more systematic and efficient ways and had better understanding of the important parts in the processes than the general elementary students. They also suggested more concrete and various ideas about the conditions of good analogies. Many scientifically-gifted and general elementary students thought that analogy generation would have positive influences on the developments of the cognitive aspects such as various higher-level thinking abilities and understanding of science concepts as well as the affective aspects such as science learning motivation and interest. Educational implications of these findings are discussed.

• Journal of The Korean Association For Science Education
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• v.26 no.3
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• pp.307-316
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• 2006

The purpose of this study was to analyze intellectual characteristics of elementary students in science-gifted education. For this, 72 science-gifted students were selected. Multiple intelligences, creativity, and the science process skills of these students were tested. To compare these traits with those of general students, 78 general students were also tested. The results of this study indicated that science-gifted students significantly surpassed general students in the areas of logical-mathematics, intra-person, and naturalist. Especially, the intelligences of logical-mathematics and intra-person were strong point of the science-gifted students. But music intelligence among the 8 intelligence was weak point. Creativity and the science process skills of the students in science-gifted education excelled those of general students. Therefore, to enhance the efficiency of the science-gifted education program in elementary school, it is necessary to consider the intellectual characteristics of the students.

• 대한생식의학회:학술대회논문집
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• 1999.11a
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• pp.50.2-51
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• 1999

• Journal of the Korean Data and Information Science Society
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• v.9 no.1
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• pp.71-76
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• 1998

By assuming a general progressive Type-II censored sample, we propose the minimum risk estimator (MRE) of the location parameter and the scale parameter of the two-parameter exponential distribution. An example is given to illustrate the methods of estimation discussed in this paper.

• Journal of The Korean Association For Science Education
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• v.31 no.8
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• pp.1077-1091
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• 2011

The purpose of this study was to examine the effects of argumentation-based general chemistry laboratory on preservice science teachers' chemistry concepts understanding and writing. Five topics about argumentation-based general chemistry laboratory activities were developed using Science Writing Heuristic (SWH) approach. Summary Writing Test, and Chemistry Concepts Test were developed as tools to examine the effects of this approach. Both Argumentation-based general chemistry laboratory activities and traditional general chemistry laboratory activities were implemented for the experimental group (23 students), and traditional general chemistry laboratory activities were implemented for the comparative group (16 students). Results of this study indicated that there were significant differences in both groups' chemistry concepts understanding and summary writing. The experimental group showed significantly higher mean score than comparative group in chemistry concepts understanding and summary writing. In the analysis of the sub-component of Summary Writing, there were no significant difference between both groups in 'Big Idea.' However, the experimental group gained significantly higher mean score in 'argumentation,' 'understanding of science concepts,' and 'rhetoric structure.' The results showed that argumentation-based general chemistry laboratory programs were effective in achieving chemistry concepts understanding and writing in general chemistry laboratory.

• Journal of The Korean Association For Science Education
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• v.39 no.1
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• pp.35-44
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• 2019

Currently, most of the science and engineering students who enter the university are required to take general chemistry and general chemistry experimental subjects. However they have different learning bases about learning basic science subjects. Regarding college entrance examinations, the current system is used for selection, so they have different levels of basic knowledge. But, without considering this situation, all of the students in science and engineering are participating in the same basic science class, some learners are relatively easy to adapt to learning, while others experience extreme difficulties and suddenly give up. This is true. The purpose of this study is to develop a scale to measure the ability to learn general chemistry of freshmen in science and engineering at H University in the Seoul Metropolitan area and to analyze what kind of learning backgrounds are related to learners. The results show that gender and major are not related to general chemistry learning major, and it we found that there is a close relationship to the relationship between their major and chemistry, the level of the chemistry learning in the high school, and the selection of chemistry in college entrance examinations. In addition, it was found that the degree of feeling that pre-learning is beneficial to current learning and that it is common with current learning is also a factor related to general chemistry learning aptitude. Therefore, in this study, we propose two ways of presenting and promoting a guide for learning by majors, and establishing a step-by-step learning system considering the level of students.

• Proceedings of the Korean Magnestics Society Conference
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• 2003.12a
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• pp.147-147
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• 2003

• International Journal of Control, Automation, and Systems
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• v.3 no.2
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• pp.244-251
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• 2005

In this paper, we study the problem of stabilizing a general nonlinear control system by means of gradient descent control method which is a dynamic feedback control law. In this method, the general nonlinear control system can be considered as an affine nonlinear control systems. Then by using Sontag's formula we investigate the stability (asymptotic) of the general nonlinear control system.

• 대한생식의학회:학술대회논문집
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• 2006.11a
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• pp.156-157
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• 2006