• The Mathematical Education
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• v.39 no.1
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• pp.21-36
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• 2000

The purpose of the study was to investigate the effects of the geoboard activities in understanding the Pythagorean Theorem. Five groups of middle school students were involved in the study. The research questions of the study were followings: 1)What are the differences in understanding and attitudes among students those who revealed the various levels of achievement when geoboards were introduced in learning the Pythagorean Theorem. 2)What was the effect of the geoboard activity in introducing the Pythagorean Theorem and solving relevant problems? 3)What would be the impression of geoboard activity for those who already knew the Pythagorean Theorem? 4)What would be the effects of interaction in geoboard activities? 5)What was the effect of the geoboard activity in recovering the Pythagorean Theorem, and applying the theorem. The result of the study revealed the positive effects of geoboard activities throughout the research questions although there were differences among various levels of students and groups.

• International Journal of Advanced Culture Technology
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• v.8 no.3
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• pp.206-210
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• 2020

The purpose of this study is to find out the specific needs of 1st graders for parents and homeroom teachers. The research questions of this study are as follows. Research question 1. What does 1st grader want from parents? Research question 2. What does the 1st grader want for the homeroom teacher? There were 31 participants. Data collection was conducted by focus group interview. Requests for parents are summarized as 'what 1st graders want from parents', and requests for teachers are summarized as 'what 1st graders want from homeroom teacher'. As the detailed topics of 'What 1st graders want from parents' are 'I have too much work to do, so I want to reduce it', 'Don't just scold me' 'Like in kindergarten, play with me' and 'I'm so hard. Take care of me'. As the detailed topics of 'what 1^st graders want from homeroom teacher.' are 'At first it was exciting', 'Scary teacher, I hate it', 'Friendly teacher, good', 'Teacher, please praise me' and 'Teacher, please teach me fun'. We revealed that the emotional support of parents and homeroom teachers is important for 1st graders to successfully adapt to elementary school.

• Journal of Elementary Mathematics Education in Korea
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• v.17 no.2
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• pp.285-299
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• 2013

Problem posing activity of which a learner reinterprets an original problem via a new problem suggested, is a learning method which encourages an active participation and approves self-directed learning ability of the learner. Especially gifted students need to get used to a creative attitude to modify or reinterpret various mathematical materials found in everyday usual lives creatively in steady manner via such empirical experience beyond the question making level of the textbook. This paper verifies the possibility of lesson on question making strategy utilization for creativity development of gifted class, and analyzes various cases of students' trials to modify the rules of a board game called Rummikub in application of their own mathematics after learning What-If-Not strategy.

• The KIPS Transactions:PartD
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• v.17D no.2
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• pp.87-102
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• 2010

A vast amount of traffic data is produced every day from detection devices but this data includes a considerable amount of errors and missing values. Moreover, this information is periodically deleted before it could be used as important analysis information. Therefore, this paper discusses the implementation of an integrated traffic history database system that continuously stores the traffic data as a multidimensional model and increases the validity and completeness of the data via a flow of processing steps, and provides a what-if analysis function. The implemented system provides various techniques to correct errors and missing data patterns, and a what-if analysis function that enables the analysis of results under various conditions by allowing the flexible definition of various process related environment variables and combinations of the processing flows. Such what-if analysis functions dramatically increase the usability of traffic data but are not provided by other traffic data systems. Experimantal results for cleaning the traffic history data showed that it provides superior performance in terms of validity and completeness.

• Korean Architects
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• s.592
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• pp.152-167
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• 2018

• Proceedings of the Korean Society for Language and Information Conference
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• 2003.06a
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• pp.35-51
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• 2003

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.05a
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• pp.496-506
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• 2006

• 대한생식의학회:학술대회논문집
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• 1996.06a
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• pp.23-33
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• 1996

• The Academic Congress of Korean Shoulder and Elbow Society
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• 2002.10a
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• pp.55-57
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• 2002

• Proceedings of KHEA Conference
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• 1997.07a
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• pp.361-364
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• 1997