• Title, Summary, Keyword: Experiments

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Elementary Pre-service Teachers' Views about the Purpose of Science Experiments (과학 실험의 목적에 대한 초등 예비 교사들의 인식)

  • Joung, Yong-Jae;Jang, Myoung-Duk;Kim, Han-Je
    • Journal of Korean Elementary Science Education
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    • v.30 no.2
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    • pp.255-270
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    • 2011
  • The purpose of this study is to investigate the elementary pre-service teachers' views about "the purpose of science experiments". For the study, the views about the purposes of scientists' experiments and school science experiments were surveyed from 227 pre-service teachers. And the responses were analyzed based on their gender, intensive majors and school science test scores. The main results of the study are as follows. First, in relation to the purpose of scientists' experiments, the pre-service teachers considered internal values of doing experiments were more worthy than the external values of it. In particular, the pre-service teachers responded that the most important purpose of the science experiments is 'to get the evidences for the theories and arguments'. On the other hand, the views from the women and social studies major pre-service teachers were more diverse than those of the man and science major pre-service teachers. Second, in relation to the purpose of school science experiments, the pre-service teachers excessively considered that the internal values of school science experiments were more worthy than the external values. In particular, only few pre-service teachers were aware of social and personal aspects of the experiments, though they considered well that the experiments are useful tools for the school science study. Third, there were quite different aspects of pre-service teachers' views between the purposes of scientists' experiments and school science experiments. For example, the views about the scientist's experiments were relatively broad concerning the nature of scientific experiments, but the school science experiments were just regarded as an educational tool for the science study. Based on the results from the study, some science educational implication were discussed.

A Study on Experimental Education in Mechanical Engineering (기계공학 분야 실험교육 현황과 향상방안)

  • Won, Yun-Jae
    • Journal of Engineering Education Research
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    • v.14 no.4
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    • pp.83-87
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    • 2011
  • In this paper, the present state of the experiments in the mechanical engineering education is analyzed and the improving methods of the experimental education are presented. Data at twelve universities are collected. In spite of the general understanding of the importance of the experiments, the portion of the experiments is less than 10%. It shows the need to increase the experiments. Experiments for basic mechanics are fairly well performed, but experiments for applied subjects would be strengthened. Several improving methods such as systematic support for experiments, use of the exclusive assistants for experiments, and so on are discussed.

Why do We do Science Experiments? : Scientifically Gifted Children's Views about the Purpose of Science Experiments (과학 실험을 왜 할까? : 초등과학 영재아들이 생각하는 과학 실험의 목적)

  • Jeong, Yong-Jae;Jang, Myeong-Deok;Kim, Han-Je
    • Journal of Korean Elementary Science Education
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    • v.30 no.2
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    • pp.189-203
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    • 2011
  • The object of this study is to investigate the views of scientifically gifted children about the purpose of scientists' experiments and school science experiments. The children's views were examined using a open-ended questionnaire survey. And then the responses from the children were analyzed with categorization. The results from the study are as follows: First, the children's views about the purpose of scientists' experiments and school science experiments were classified to 2 top-level, 5 mid-level and 21 sub-level categories. Second, it was found that the children considered internal values of doing experiments are more worthy than the social and personal usefulness of the experiments. Third, the gifted children mentioned most frequently that the purposes of the scientist experiment is 'to get the evidences for their theory and argument which is unusual in the regular children's views. Also the discovery of new phenomena and materials, and the generation of new theories and ideas were mentioned as purposes of the scientist experiments. Fourth, the students frequently stated that school science experiments support effective learning of science subject enhancing subject interests and better explanation/understanding. Fifth, relatively many students thought that the purposes of school science experiments are different with those of scientist experiments. Based on the results from the study, some educational suggestions are discussed.

Elementary Students' Awareness about Self-directed Learning Experiments at Science Club (과학 동아리에서 경험한 자기 주도적 실험 학습에 대한 초등학생들의 인식)

  • Ju, Eun Jeong;Kim, Heung-Tae
    • Journal of Korean Elementary Science Education
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    • v.35 no.2
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    • pp.253-264
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    • 2016
  • The purpose of this study was to investigate implications of self-directed learning experiments in elementary science education through understanding elementary school students' awareness of their experiences in self-directed learning experiments. Twenty students joined the school science club voluntarily and conducted self-directed learning experiments. We collected data through observation of the experiments, interviews, and questionnaires. The students who participated in the club showed high satisfaction with self-directed learning experiments. The participants were aware that their scientific interest and knowledge, and the confidence in conducting experiments were increased. The students felt positive about the inquiry process of conducting self-directed learning experiments with their own subjects. They also felt a sense of achievement in attempting their experiments in defiance of several failures. The participants realized that the self-directed inquires led to increased declarative and procedural knowledge of science. The students stated that they had some difficulties in coping with the different results contrary to expectations and preparing laboratory materials and instruments. Nonetheless, they showed the promotion of their scientific literacy during overcoming those difficulties. We suggest that self-directed learning experiments can be a more effective way in science learning to make students experience the nature of science than existing school experiments. This can be implemented through a creative experience activities such as science clubs.

Analysis of Middle School Biology Experiments by Vee Diagram (Vee Diagram을 이용한 제 5차,6차 교과서의 실험.관찰의 비교분석 - 중학교 2학년 생물단원을 중심으로 -)

  • Park, Sung-Eun;Hur, Myung
    • Journal of The Korean Association For Science Education
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    • v.16 no.3
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    • pp.260-269
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    • 1996
  • Middle school biology experiments were analyzed by Vee Diagram. Major findings of this study are as follows : 1. Principles were not explit in the most of the experiments. 2. The knowledge included in the experiments has rapid progress when compared with the experimental procedure. 3. The concepts were not consistent with the interaction of knowledge claim and previous knowledge. 4. Though some experiments were improved in the 6th Curriculum, many experiments did not mention value claims.

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Elementary School Students' Perception about the Aims of School Science Experiments by Gender and Academic Achievement (성별과 학업 성취도에 따른 학교 과학 실험의 목적에 대한 초등학생의 인식)

  • Kim, Ji-Hye;Shin, Young-Joon
    • Journal of Korean Elementary Science Education
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    • v.32 no.2
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    • pp.159-168
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    • 2013
  • The purpose of this study was to investigate the elementary school students' perception about "the aims of school science experiments". For this study, the perceptions were surveyed from 193 elementary school students (96 boys and 97 girls) in one school located in Gyeonggi-Do. The responses were analyzed with categorization based on their gender, school science test scores. The results from this study were as follows; in relation to the aims of school science experiments, the elementary school students considered intrinsic values of doing experiments were more worthy than the extrinsic values of it. It was found that 25.4% of the students had ideas that students do science experiments for understanding science theory. Up to 70% of the students responded that they do science experiments for understanding and memorizing the contents of science textbooks. School science experiments were regarded as an educational tool for the science study. It is recommended that teacher need to make clear the aims of laboratory work and help students to understand of it.

Optimal Design for Injection Molding Processes using Design of Experiments and Finite Element Analysis (실험계획법과 유한요소해석을 연계한 사출성형 공정의 최적설계)

  • Park K.;Ahn J. H.;Choi S.R.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.150-153
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    • 2001
  • The present work concerns optimal design for the injection molding process of a deflection yoke (coil separator). The optimal design for the injection molding process is developed using design of experiments and finite element analysis. Two design of experiments approaches are applied such as: the design of experiment for mold design and the design the experiments for determination of process parameters. Finite element analyses have been carried out as a design of experiments for mold design: runner system and cooling channel. In order to determine optimal process experiments have been performed for various process conditions with the design of experiments scheduling.

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Remote Experiments for Control Education

  • Kwon, Bo-Kyu
    • 제어로봇시스템학회:학술대회논문집
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    • pp.2192-2197
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    • 2003
  • This paper suggests remote experiments using the internet for the control education. The remote experiment is composed of equipment server computers, networks accessible to internet, and real plants such as inverted pendulums, crane systems and microcontrollers. Additionally, it requires a server program that has I/O functions with plants and calculate the control, an interface program bridging between web and the server program, and the home page including the detail explanation for the usage. For effective educations, how to perform experiments and how to combine the experiment with lectures will be discussed. The simple experiments by entering a few control parameters and the complex experiments by designing overall controls, will be explained. Technologies related with the remote experiment and other possible remote experiment will be introduced. It is demonstrated that the remote experiment will be very useful, particular for control education where students have difficulties in performing the experiments for lack of experimental equipments.

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Comparison of Statistical Experiments and Measures of Information

  • Sohn, Keon-Tae;Jeon, Jong-Woo
    • Journal of the Korean Statistical Society
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    • v.23 no.2
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    • pp.271-292
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    • 1994
  • The comparison of statistical experiments with a common parameter and parameter space is discussed using the concept of the Blackwell's sufficiency and the Shannon's entropy. Binomial and censored experiments are considered as applications. The loss of information is studied under teh aggregated experiments and truncated experiments, and summerized in some tables which make it possible to indicate the choice of an appropriate experiment.

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