• Geomechanics and Engineering
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• 제35권2호
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• pp.181-194
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• 2023

The primary objective of this study is to examine the influence of geometry on the stability characteristics of cylindrical microstructures. This investigation entails a stability analysis of a bi-directional functionally graded (BD-FG) cylindrical imperfect concrete beam, focusing on the impact of geometry. Both the first-order shear deformation beam theory and the modified coupled stress theory are employed to explore the buckling and dynamic behaviors of the structure. The cylinder-shaped imperfect beam is constructed using a porosity-dependent functionally graded (FG) concrete material, wherein diverse porosity voids and material distributions are incorporated along the radial axis of the beam. The radius functions are considered in both uniform and nonuniform variations, reflecting their alterations along the length of the beam. The combination of these characteristics leads to the creation of BD-FG configurations. In order to enable the assessment of stability using energy principles, a numerical technique is utilized to formulate the equations for partial derivatives (PDEs).

• 한국초등과학교육학회지:초등과학교육
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• 제21권2호
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• pp.143-157
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• 2002

The aims of this study are to develop web-based learning materials for science and environmental education of elementary school. The effect of environmental education was divided into eight to measure: the awareness of using web as environmental material, the ability to use web as environmental material. the awareness of environmental problems, the satisfaction for environmental education using web, the awareness of preserving local environment, self-leading ability to learn environment, the effect of using environment homepage, and the internalization of environmental awareness. This study obtained the following results; First, as a result of post-test, the average of the test group of web-based learning was 1.29 points higher than the control group having traditional learning in the awareness of using web as environmental material, showing a statistically significant difference. Second, as a result of post-test, the average of the test group of web-based learning was 2.80 points higher than the control group in the ability to use web as environmental material, showing a statistically significant difference. Third, as a result of post-test, the average of the test group of web-based learning was 1.10 points higher than the control group in the awareness of environmental problems, showing a statistically significant difference. Fourth, as a result of post-test, the average of the test group of web-based teaming was 0.89 points higher than the control group in the satisfaction for environmental education using web, showing a statistically significant difference. Fifth, as a result of post-test, the average of the test group of web-based learning was 1.70 points higher than the control group in the self-leading ability to learn environment, showing a statistically significant difference. Sixth, as a result of post-test, the average of the test group of web-based learning was 1.21 points higher than the control group in the effect of using environment homepage, showing a statistically significant difference. Finally, as a result of post-test, the average of the test group of web-based learning was 1.39 points higher than the control group in the internalization of environmental awareness, showing a statistically significant difference. Based on these results, it is assumed that the teaching method which applied web-based teaming to science and environmental education in elementary school is a effective strategy for elementary science and on environmental education.

• 정보교육학회논문지
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• 제4권2호
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• pp.212-222
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• 2001

본 논문에서는 교육용 웹 기반 멀티미디어 코스웨어를 구축할 때 고려해야 하는 네비게이션 화면의 설계 방법에 관하여 연구하였다. 코스웨어를 구성하는 정보구조와 각 구조에 적합한 구체적 탐색 기법에 관해 분석하였으며, 이를 바탕으로 효율적인 초등학생용 웹 기반 멀티미디어 코스웨어를 위한 네비게이션 화면의 설계 방법으로 메뉴-연속 조합형 방법을 제안하였다. 그리고, 제안된 화면 설계방법에 따른 구체적인 코스웨어를 구현하여 현장에 적용 분석하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1998년도 춘계학술대회 논문집
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• pp.453-455
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• 1998

No Abstract, See Full-Text

• 한국과학교육학회지
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• 제10권1호
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• pp.33-45
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• 1990

To achieve the aim of science education, it is known that warious teaching, and learning materials should have to be used. As a sub-textbook for primary science education, 'Sil Hum-Kwan Chal (Experiment and Observation), teaching and learing material are developed and using now in science. This material have following characteristics; (a) Soruce-book contains reading materials for additional information, various pictures to enririch the science concepts, and supplementary and enrichment activities. (b) Work-book consists of the detailed procedures of activities of experiments presented in the textbook, student can record the experimental procedures and results. (c) Operational manuals provide operation techniques for experimental equipments which are used in science class. In this study the using status are surveyed for the 3rd grade of primary school, and based on this survey the improvement plan are discussed in view of design, quantity and utility, of sub-textbook.

• 한국수학교육학회지시리즈A:수학교육
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• 제54권1호
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• pp.31-47
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• 2015

School Math Field Trips(SMFT) for School Mathematics can be defined as teaching and learning activity of mathematics going into the field of Korean history, culture, science and technology. This is a literature analysis study to systemize teaching and learning method of mathematics based on literature analysis and real SMFT activity. First, SMFT was introduced to improve cognitive affective and cultural-mathematical teaching and learning method of mathematics. Second, SMFT has three purposes of cognitive, affective and cultural-mathematical. Third, to conduct mathematical education activity the direction of teaching was set. Forth, the progressing way of developing material and SMFT was researched. Fifth, developing the evaluation standard of SMFT and evaluation method was suggested.

• Bulletin of the Korean Chemical Society
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• 제29권11호
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• pp.2270-2272
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• 2008

• 한국동물학회:학술대회논문집
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• 한국동물학회 2001년도 한국생물과학협회 학술발표대회
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• pp.270.3-270
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• 2001

No Abstract, See Full Text

• 한국지역사회생활과학회지
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• 제18권4호
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• pp.687-698
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• 2007

This study was conducted to investigate actual conditions and needs of nutrition education in order to develop a nutrition education program for pregnant women in health centers. The questionnaires were mailed to 245 health centers and 146 questionnaires were returned. Most health centers(76%) had nutrition education program for pregnant women. About 63% of supervisors were the nurses and 43% of educators were dieticians. The teaching method which was used most frequently was lecturing(34%). Teaching material which was used most frequently was material brought by invited speakers(31%). The subjects of education were the relationship between nutrition for pregnant women and the baby's health(19%), dietary guide and directions for pregnancy(19%), nutrient supplement for pregnant woman(17%), weight gain during pregnancy(16%), abnormal symptoms of pregnancy and health(15%), pregnancy complications and health(13.0%), and others. These subjects were the same ones which educators thought were needed in education. Important success factors in education were giving accurate information and guide and practice, while failure factors were lack of proper space, lack of practice, and others. Lack of a standardized nutrition education program was the biggest barrier to running a program. The subjects which were taught and the needs in nutrition education were significantly different according to respondents' age, educational level, job position, and residence of health center. Therefore, a standardized program, proper space for practice, and professional educators are needed to promote the effectiveness of nutrition education.

• 한국의류산업학회지
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• 제15권6호
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• pp.899-911
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• 2013

This study investigated the current curricula for the training of textile design specialists. In-depth interviews were conducted with 6 practitioners working in the textile design industry; subsequently, the curricula offered by 20 textile design-related departments at 4-year and 2-year colleges in Korea were used for the data analysis. The results of this study were: First, the problems of textile design education were (1) a limited understanding of commercial designs, (2) an education system concentrated on pattern designs, (3) limited creativity and design expression capacity, (4) limited practical ability and the analysis of collection. Second, most textile design departments at Korean colleges were located in the Seoul/Gyeonggi district and Gyeongbuk/Gyeongnam district. Third, textile material and imagination/expression subjects were a limited part of the curricula; subsequently, a long-term and systematic education system (by college year) was required for the use of basic education subjects. Fourth, there was a shortage of practical subjects in college education despite the perception of commercial designs; in addition, a professional design education (by material and use) were an important part of practical business.