• Title/Summary/Keyword: analyzing science class

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A Case Study on Development and Application of the Explicit Teaching and Learning Strategy for Comprehension of the Middle School Students' Basic Science Process Skills (중학생의 기초 탐구 기능 이해를 위한 명시적 교수.학습 전략의 개발 및 적용 사례 분석)

  • Hong, Seok-Jun;Son, Yeon-A
    • Journal of The Korean Association For Science Education
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    • v.31 no.4
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    • pp.641-662
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    • 2011
  • In this study, explicit Teaching and Learning strategy for middle school students were developed to improve basic science process skills. After applying these strategy in an actual class, the effects of Teaching and Learning strategy and change of students were analyzed. Explicit Teaching and Learning strategy to improve basic science process skills are developed based on analyzing preceding research. The use of application criteria for class of basic science process skills combined with explicit Teaching and Learning strategy, it is sought for the explicit instructional procedures of said skills. After analyzing the class in which explicit Teaching and Learning strategy were demonstrated, students reported that they were able to comprehend basic science process skills more effectively through the stages of explicit explaining and independent practice. The showing demonstration stage was heavily emphasized by the teacher in this class. Analysis of students' understanding degree about basic science process skills, most of them show positive outcome. Another analysis of ripple effect on daily life and other subjects, it is found that students could have the attitude to make use of science process skills for themselves. Through the result of study, it is found that explicit Teaching and Learning strategy that are developed from this study are an effective way to comprehension students' basic science process skills. Thus, continued study is needed to develop and spread explicit Teaching and Learning strategy of science process skills to be applicable in actual classes in secondary schools.

Feasibility Study on Road Bridge Passed by Heavy Equipment Transporter (HETS 차량의 교량 통과 가능성에 관한 연구)

  • Kang, Young-Chul;Lee, Pil-Jae
    • Journal of the Korea Institute of Military Science and Technology
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    • v.12 no.2
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    • pp.236-247
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    • 2009
  • In Korea, the driving system restriction criteria is strictly applied(gross weight 400kN, axial load 100kN). Especially after the Seoungsu Bridge accident, safety factor has been strictly applied. The Safety factor is applied to the cumulative results for each steps like design, construction, maintenance of the Bridge. Because of it, the bridge is undervalued compared to its capacity. So, this generates loss for both private and military sector(eg. logistical delays, structural damage, etc.). But analyzing data from many existing researches we have confirmed that the military heavy vehicle may pass through the first class bridges. In consequence, this study have focused on determining whether HETS vehicles can pass over the first class bridge, without safety issues, using MIDAS structural analysis program. The results have confirmed that the military heavy vehicle may pass over the bridge.

The Effects of Using Science Notebooks in the Open Inquiry Activities by Cognitive Levels (인지 수준에 따른 자유 탐구 활동에서 과학 탐구 노트의 활용 효과)

  • Lee, Sang-Gyun
    • Journal of Korean Elementary Science Education
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    • v.30 no.2
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    • pp.242-254
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    • 2011
  • The purpose of this study was to understand the teaching effects according to the cognitive levels after conducting inquiry activities using science notebooks in the open inquiry activities of the elementary science class. The results of this study were as follow. first, students having the open inquiry activities using science notebooks showed improvement in scientific inquiry abilities in both groups with the low and high cognitive level. Second, regarding the changes of scientific attitudes, both groups with the low and high cognitive level exhibited improvement. According to the result of analyzing interaction between the cognitive level and class treatment on the effects for scientific inquiry abilities and scientific attitudes, there was no difference by the cognitive level. And the use of science notebooks in open inquiry activities had effects on improving scientific inquiry abilities and scientific attitudes regardless of the cognitive level.

Analysis of the Structural Relationship among Learning Outcomes in Science Classes applying Universal Design for Learning (보편적 학습 설계를 적용한 과학 수업의 학습 성과에 관한 구조적 관계 분석)

  • Lee, Kyoeng-Ran;Back, Nam-Gwon;Park, Jong-Ho
    • Journal of Korean Elementary Science Education
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    • v.34 no.1
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    • pp.1-14
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    • 2015
  • The variety of learners include students with disabilities and general students, and an ongoing focus of inclusive education research is non-discrimination. As part of integrated education, UDL (Universal Design for Learning) for students with disabilities supports a practical approach, participation, and advancement to improve learning opportunities for all students. The purpose of this study was to examine the effects of using UDL in science classes. The dependent variables of this study were academic achievement in science, scientific attitude, and scientific motivation. In this study, the experimental groups were 9 people in the 5th grade and 11 people in 6th grade. The experimental groups were taught science class using UDL. In order to analyze the learning outcomes, the structure equation model was performed. The results of this study were as follows: First, the science achievement of learning outcomes of the science class applying UDL directly affected both scientific attitude and scientific motivation. Second, the scientific attitude of learning outcomes of the science class applying UDL directly did not affect scientific motivation. According to these results, learning outcomes for science achievement of the science class applying UDL showed that UDL affected both general students and students with disabilities. To summarize the analysis of learning outcomes, science achievement directly affected both scientific attitude and scientific motivation while scientific attitude did not affect scientific motivation. This study offered a specific implementation method for integrated education. Using the structure equation model for analyzing the effect has more significance.

Characteristics and Changes of Epistemic Thinking in Middle School Students on Class-Argument Activities in an Argument-Based Inquiry(ABI) Science Class (논의기반 탐구 과학수업의 학급 논의 활동에서 나타나는 중학생들의 인식론적 사고의 특징 및 변화)

  • Park, Jiyeon;Jung, Dojun;Nam, Jeonghee
    • Journal of the Korean Chemical Society
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    • v.64 no.1
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    • pp.38-48
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    • 2020
  • The purpose of this study was to analysis characteristics and changes of epistemic thinking in middle school students on class-argument activities in an argument-based inquiry(ABI) science class. Data was collected from class recording video and activity worksheets of five subjects argument-based inquiry. Results of the analysis of student epistemic cognition characteristics show that experimental data was presented the most as evidence, and depending on the ABI activity, personal experience-based evidence and evidence based on scientific principles were used. As a result of analyzing the changes between claims made before and after class argumentations on five ABI activities in an argument-based inquiry science class, student claim modifications could be classified, according to reasons for the modification, into three types: correcting incorrect claims, clarifying unclear content, and expanding the concept.

Public Perceptions of Scientists and Engineers in Korea: Focusing on the Effects of Generation, Gender, and Class Fields (한국인의 과학기술자에 대한 인식분석: 세대, 성, 전공계열의 영향을 중심으로)

  • Park, Hui-Je
    • Journal of Technology Innovation
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    • v.13 no.1
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    • pp.169-191
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    • 2005
  • By analyzing a national survey of public understanding of science and technology, this paper attempts to examine public perceptions of scientists and engineers in Korea. A special attention is given to the gap in the view of scientists and engineers across generation, gender, and class fields (or major fields). This paper shows that generation has the strongest effect on public perceptions of scientists and engineers among all the socio-demographic factors examined in this study. Those over 50 are more likely to have the conventional idealized images of scientists and the stereotypical negative images of scientists simultaneously, while the 20s are less likely to accept the idealized image of scientists. The survey result thus may suggest that the younger generation began to depart from a patriotic and moral description of scientists and engineers-for the younger generation, science and engineering is losing moral respect but becomes perceived as an ordinary occupation. Contrary to the popular belief, however, gender has little effect on public perceptions of scientists and engineers. This finding questions the assertion that female students possess more negative attitudes toward scientists and engineers than male students, and thus are reluctant to develop careers related to science and engineering. By uncovering that class fields (or major areas) have no effect on the image of scientists, this study also call into question the assertion in the science wars that the inadequate appreciation of science particularly among those who do not major in science and engineering is responsible for inadequate support for science and technology.

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A divide-oversampling and conquer algorithm based support vector machine for massive and highly imbalanced data (불균형의 대용량 범주형 자료에 대한 분할-과대추출 정복 서포트 벡터 머신)

  • Bang, Sungwan;Kim, Jaeoh
    • The Korean Journal of Applied Statistics
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    • v.35 no.2
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    • pp.177-188
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    • 2022
  • The support vector machine (SVM) has been successfully applied to various classification areas with a high level of classification accuracy. However, it is infeasible to use the SVM in analyzing massive data because of its significant computational problems. When analyzing imbalanced data with different class sizes, furthermore, the classification accuracy of SVM in minority class may drop significantly because its classifier could be biased toward the majority class. To overcome such a problem, we propose the DOC-SVM method, which uses divide-oversampling and conquers techniques. The proposed DOC-SVM divides the majority class into a few subsets and applies an oversampling technique to the minority class in order to produce the balanced subsets. And then the DOC-SVM obtains the final classifier by aggregating all SVM classifiers obtained from the balanced subsets. Simulation studies are presented to demonstrate the satisfactory performance of the proposed method.

The Effects of Out-of-Class Environmental Experience Learning on Elementary Students' Environmental Literacy (체험형 환경학습 프로그램이 초등학생의 환경소양에 미치는 효과)

  • Lyu, Kyung-Hee;Shin, Young-Joon
    • Journal of Korean Elementary Science Education
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    • v.33 no.1
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    • pp.69-81
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    • 2014
  • This study was to find out the effects of out-of-class environmental experience learning on elementary students' environmental literacy. For this study, we developed and applied environmental education program utilizing out-of-class facilities and ecological park for the 5th-grade students. The subjects of this study were the 5th grade students of an elementary school located in Si-hung city. The study was carried out for two groups, an experiment group of 29 students and control group of 29 students. The education program using out-of-class environmental experience learning was provided to the experiment group while lecture-oriented education program was provided to the control group. The questionnaire used in this study to assess the environmental literacy of the study objects consists of 41 questions under 4 domains (knowledge, emotion, skill, behavior). After observing and analyzing the effects of out-of-class environmental experience learning on students' environmental literacy, we found that the program using the out-of-class environmental experience learning posed greater impacts than lecture-oriented program. By domains, environmental literacy in 3 domains illustrated positive improvement. In particular, skill domain illustrated much more improvement in environmental literacy. But, domain of behavior didn't illustrated improvement in environmental literacy. The result of this study signified that the out-of-class environmental experience learning has positive and effective impact on the environmental literacy. And out-of-class environmental experience learning is more suitable to improve the skill domain of the environmental literacy than lecture-oriented learning. But, it is couldn't improve the domain of behavior. Therefore, in order to improve behavior domain, the program must apply with effective evaluation and home training.

The Influences of the Important Perception on Food Hygiene to Kitchen Employee's Performance in Hotel Banquet (호텔 연회 주방 종사원의 식품위생 중요도 인식이 수행도에 미치는 영향)

  • Kim, Ju-Myong;Kim, Auk-Ran;Jun, Heo
    • Culinary science and hospitality research
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    • v.13 no.1 s.32
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    • pp.75-86
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    • 2007
  • This study was carried out to find out the effect of food hygiene awareness on kitchen employees' performance in the banquet cuisine of five-star hotels in Seoul. 279 kitchen employees were asked to fill out the questionnaire, and the collected data were analyzed by SPSS package(version 11.0). First, results of analysis on food hygiene showed that there were four factors, each respectively named as, food security regulations, food storage, period of circulation of food, and food safekeeping. Second, after analyzing each item in whole according to each of the factors, the average degree of priority on food hygiene in general was 4.52. Results according to each of the elements showed that food security regulations(4.56) and period of circulation of food(4.55) were considered as a priority. After analyzing the difference between the degree of priority and degree of performance according to each of the factors, it was found out that the latter was significantly lower than the former in all factors. Third, after analyzing the difference of food hygiene priority in accordance with general characteristics, statistically significant difference was only shown in education(F=3.308, p<0.05) and class(F=4.418, p<0.01). Fourth, after analyzing the difference of food hygiene performance in accordance with general characteristics, the only significant difference was found in food security regulation of education(F=4.418, p<0.01) and food security regulation of class(F=3.859, p<0.01). Fifth, after analyzing the effect of cook's awareness of priority on food hygiene on the degree of performance, it was found out that the awareness of priority on food hygiene had a positive effect(+) on the degree of performance. Therefore, we can conclude that as kitchen employees recognize the priority on the food hygiene better, their degree of performance was higher.

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A Study on the Needs and Educational Satisfaction of Korean Herbal Food Educators (한국 약선 교육 수강생들의 교육 만족도 및 요구도)

  • Cho, Su-Kyoung;Sim, Ki-Hyeon
    • Korean journal of food and cookery science
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    • v.27 no.5
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    • pp.611-623
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    • 2011
  • The goal of this study was to understand the reasons for learning about Korean herbal food by examining the actual conditions in a Korean herbal food course during lifestyle education. The general characteristics of the people learning about or working with the food as well as the correlations between the examined factors were analyzed, focusing on each person's dietary lifestyle. We divided the class participants into five dietary lifestyle groups by analyzing their scores. Group 1 was the"taste-seeking type", group 2 was the "quality-seeking type", group 3 was the"economy-seeking type", group 4 was the"convenience and economy-seeking type", and group 5 was the"convenience and health-seeking type". A person with a cooking career was considered to have more experience with Korean herbal food. The highest motivation for Korean herbal food education was for professional reasons, and the class that was most appreciated was learning about Korean traditional herbal foods. The highest satisfaction for the class was based on the instructor's knowledge, followed by food tastes, foodstuffs, educational materials, and the facilities superintendent. Satisfaction with the class tuition and practical utilization was relatively low.