• Proceedings of the Earthquake Engineering Society of Korea Conference
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• 2002.03a
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• pp.159-168
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• 2002

A recently developed filbert-Huang transform (HHT) technique is applied to detect damage locations of bridge structures. The HHT may be used to identify the locations of damages which exhibit nonlinear and nonstationary behavior, since the HHT can show the instantaneous frequency characteristics of the signal. A series of numerical simulations were conducted for bridge pier systems with damages under a controlled load with sweeping frequency. The results of the numerical simulation study indicate that the HHT method can reasonably identify damage locations using a limited number of acceleration sensors under severe measurement noise condition.

• Journal of Korean Elementary Science Education
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• v.28 no.3
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• pp.340-351
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• 2009

The purpose of this study was to investigate the effect of case-based learning program on three elementary students' scientific problem solving and attitudes in science class. For this study, case-based learning program was designed for bridging students' scientific knowledge and their personal experiences in real life through 4 stages: understanding the problem, planning for problem solving, conducting problem solving, and making conclusion. This study was carried out through 17 lessons of 4th grade for 6 weeks. The data was collected through close observation on three students in two groups in a class. The results include that cased-based learning program showed overall positive effects on the elementary students' scientific problem solving and attitudes in class. In particular, it turned out that the continuous emphasis of real world examples in case-based learning had powerful impacts on students' problem solving abtsity, motivation, and participation in classroom activities. The key factors to successful problem solving in school science was discussed.

• Journal of Korean Elementary Science Education
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• v.28 no.4
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• pp.495-506
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• 2009

The purposes of the study were to examine the effect of 'Hands-on Science Class at School' program on students' scientific attitude and interest, and to investigate the satisfaction differences by students, lecturers, and local operating organizations respectively. For this study, 1,054 students from 1st to 6th grade participated in the national-wide survey, while they engaged in the program activities during 3 months. 496 students participated in scientific attitude test and 558 students answered to scientific interest test. For the program satisfaction survey, 689 out of 1,054 students, 363 lecturers and 55 local operating organizations also participated. The data show that 'Hands-on Science Class at School' program gave positive influences on students' scientific attitude improvement. The program also had considerable effects on increasing students' interest toward science as well. The satisfaction survey results showed that students' satisfaction with the program was significantly higher than lecturers'. The educational implications are discussed.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.34 no.s01
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• pp.4-15
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• 1989

The objective of this paper is to compare and summarize the procedure and effectiveness of some bioassay systems and to point out ways to obtain reliable results from each bioassay. Detailed C:escriptions were given for those widely-adapted bioassay methods, such as mungbean rooting (auxin), Avena first internode straight growth (auxin), dwarf rice growth (gibberellin), dwarf pea epicotyl elongation (gibberellin), radish cotyledon expansion test (cytokinin), and tobacco stem pith callus growth (cytokinin), and the effects of various plant growth regulators including some recently introduced growth retardants (Paclobutrazol, Uniconazol, etc.) were also summarized.

• Journal of Korean Elementary Science Education
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• v.25 no.spc5
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• pp.532-547
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• 2007

The purposes of this study were to investigate the creative science problem solving (CSPS) process amongst scientifically-gifted students and average students through the qualitative think-aloud research method, and to compare the differences in their CSP, scientific knowledge, scientific process skills, creative thinking, and finally, the affective domain used in their CSPS. For the purposes of this study, two scientifically-gifted 6th grade students and one average student were selected. The results show that one gifted student with good creative thinking skills exhibited better performance in CSPS than the other gifted student, who had the highest level of scientific knowledge. In the case of the average student, in spite of her high level of factual knowledge, she had difficulty in proceeding in CSPS due to her shallow scientific knowledge along with her low level of understanding of the given problem. This study highlights the importance of considering the factors which influence successful CSPS and which can play an important role in the education of scientifically-gifted children. These factors were identified as scientific knowledge, understanding of the scientific process, creative thinking, the affective domain, and science problem solving skills.

• Journal of Korean Elementary Science Education
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• v.32 no.1
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• pp.82-94
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• 2013

The purpose of this study was to investigate the process and the effect of pre-service teacher's scaffolding in environmental camp program about global climate change. For this study, developed the environmental camp program based pre-service teacher's scaffolding and applied to 78 $5^{th}$ students. We analyzed the role of pre-service teacher in the process of scaffolding. In the result, the pre-service teachers conducted cognitive scaffolding like as "Focus", "Hint", "Tell or Summarize" and "Technical Help". They carried out the emotional scaffolding like as "Create Cheerful Atmosphere", "Encourage", and "Help in Living". Teaching and learning about global climate change, the theme of the camp, was regarded uncertain and complex. So, pre-service teacher's scaffolding was effective to promote environmental literacy about climate change of primary students (<0.05). The student teachers understanded the characteristics of the children through emotionally close relationships. The primary students were learned easier about global climate change through cognitive and emotional scaffolding. They experienced environmental practice with communal living in camp.

• Journal of Korean Elementary Science Education
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• v.36 no.1
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• pp.73-84
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• 2017

Cultivating creativity is one of the goals in science education. Previous studies report that students use visualization while they solve the creative science problem and it looks helpful to make them think more. For this study three $6^{th}$ grade students were selected in the consideration of pre-test through the qualitative think-aloud method. The results show that even though students have many ideas in planning stage in problem solving, they appeared to visualize familiar and empirical ideas at first. So if teachers want to watch another creative ideas, they tended to give enough time to visualize many ideas. Students drew lines, circles, "X"marks to select or remove information during their problem solving works. They said these marks seem to be useful to understand question. However, removal marks sometimes turn out to block another chance to re-think. Also students did not have a chance to reflect what they did. It means that they lose the chance to do convergent thinking. The implications of this study include the importance of students' visualization works to facilitate their creative ideas and support their problem solving strategies. In this study, we discuss the meaningful messages for teachers who construct science classroom for creativity.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06c
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• pp.53-58
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• 2007

선진각국에서 고령화 문제를 해결하기 위하여 고령친화 산업과 관련된 많은 연구들이 진행되고 있다. 본 논문에서는 노인 요양 또는 복지 시설내 노인들의 거주 환경 변화 및 거주자의 활동 양상을 측정하는 노인케어 유비쿼터스 시스템 knu-SCS(KangNam Ubiquitous Senior Care System)에 대하여 연구하였다. knu-SCS 시스템은 조도, 습도, 온도 센서, 웹 카메라 등으로 구성되며, 각종 센서들이 감지한 데이터를 저장, 가공, 분석하기 위하여 데이터베이스를 설계 및 구현하였다. 또한, 데이터베이스에 저장된 데이터들을 사용자들에게 시각적으로 제시하기 위하여 센서 웹을 구현하였다. 센서 웹에서 제시하는 데이터들은 일상적인 노인 행동 및 생활환경을 인지할 수 있는 자료가 되므로, 이를 기초로 노인들이 겪을 수 있는 건강상 문제나 일상생활의 불편함을 해소하는 등 노인 케어에 활용될 수 있다.

• Journal of the Korean Society of School Health
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• v.23 no.2
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• pp.200-206
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• 2010

Purpose: This study compared the major parent's height and life style between short and tall stature groups of students attending the elementary schools. Methods: Data were collected during the period of 5 to 24, November 2007 at the fifth and sixth grades of the five elementary schools. Two groups were selected on the basis of the guideline titled 'Growth Standard for Infants and Juveniles in 2007': Tall group of 232 students whose height was greater than 75 percentile and short group of 227 students was less than 25 percentile. Results: The average height was 137.9 cm for short group and 155.3 cm for tall group. The results of the logistic analysis implied that parent's height was related with odds ratio equal to 1.141 for father's height and 1.145 for mother height. Analysis of the eating habit, there was no significant difference observed between the two groups. While The two group showed a statistically significant difference in their physical activity. Conclusion: There is the necessity for guidance and health education program about the proper life style.

• The Journal of the Korea Contents Association
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• v.7 no.9
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• pp.62-71
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• 2007

Man kind has been doing a human body ornament as a expression of desire for beauty from the earliest times. The ornament might assume expression for the human body earlier than clothes it has protected human body from the exterior such as dishonor, cold weather and hot weather etc. because ornament has been excavated compare than clothes. for example. The aborigine's clothes and tools seem to be more splendid ornament than natural function. The ornament has been development with variety such as bone from the animals, Feather from the primitive ages to high technology new materials in the modern society. In this research contribute that development of jewelry contents industries through the vernacular of tradition korean jewelry.