• Title/Summary/Keyword: 물리 학습

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Preconceptions of Middle School Students Related to (화학 변화 개념에 대한 중학교 2학년 학생들의 선개념 조사 및 선개념 갈등상황 제시를 통한 개념변화 학습이론의 효과 분석)

  • Paik, Seoung Hye;Kang, Dae Hun;Kim, Hye Kyong;Chae, Woo Ki;Kwon, Kyoon
    • Journal of the Korean Chemical Society
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    • v.43 no.2
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    • pp.213-224
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    • 1999
  • Preconceptions of middle school students related to chemical change the students are surveyed. The students are divided into experimental group that are learned by concept change theory teaching model, and control group that are learned by traditional teaching method based on science textbooks. After the planned classes, the tendencies of concept change of the two groups according to students learning motivations are analyzed. New teaching methods, which based on concept change learning model and students learning motivations, developed by this research. And the effects of the new teaching method are testified. As a result, it is proved that most of the students have a lot of preconceptions, and persist the wrong conceptions after the classes. This tendency is same in the control group and in the experimental group.

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Analysis of the Effect of the Havruta Method in Engineering Education (공학교육에서 하브루타 수업방식의 효과 분석)

  • Eom, Mi Ri;Lee, Young In
    • Journal of Convergence for Information Technology
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    • v.10 no.1
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    • pp.149-157
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    • 2020
  • This study aimed to explore the change of engineering students' competencies through the havruta class. In the havruta class, engineering students' competencies were compared with pre-test and post-test. The research tool was developed by selecting learning readiness, academic self-efficacy, and communication ability as the learner's competence in the havruta class. Finally, 105 data were analyzed with SPSS 21.0 for windows. First, there was a statistically significant difference in learning readiness. Second, there was no statistically significant difference in academic self-efficacy. Third, there was a statistically significant difference in communication ability. It was found that there was a positive change of competencies in learning readiness ability and communication ability in the havruta class. Although the findings are difficult to generalize to all majors, these results will be a useful basis for instructors who want to apply the havruta class.

Development of hybrid precipitation nowcasting model by using conditional GAN-based model and WRF (GAN 및 물리과정 기반 모델 결합을 통한 Hybrid 강우예측모델 개발)

  • Suyeon Choi;Yeonjoo Kim
    • Proceedings of the Korea Water Resources Association Conference
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    • 2023.05a
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    • pp.100-100
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    • 2023
  • 단기 강우 예측에는 주로 물리과정 기반 수치예보모델(NWPs, Numerical Prediction Models) 과 레이더 기반 확률론적 방법이 사용되어 왔으며, 최근에는 머신러닝을 이용한 레이더 기반 강우예측 모델이 단기 강우 예측에 뛰어난 성능을 보이는 것을 확인하여 관련 연구가 활발히 진행되고 있다. 하지만 머신러닝 기반 모델은 예측 선행시간 증가 시 성능이 크게 저하되며, 또한 대기의 물리적 과정을 고려하지 않는 Black-box 모델이라는 한계점이 존재한다. 본 연구에서는 이러한 한계를 극복하기 위해 머신러닝 기반 blending 기법을 통해 물리과정 기반 수치예보모델인 Weather Research and Forecasting (WRF)와 최신 머신러닝 기법 (cGAN, conditional Generative Adversarial Network) 기반 모델을 결합한 Hybrid 강우예측모델을 개발하고자 하였다. cGAN 기반 모델 개발을 위해 1시간 단위 1km 공간해상도의 레이더 반사도, WRF 모델로부터 산출된 기상 자료(온도, 풍속 등), 유역관련 정보(DEM, 토지피복 등)를 입력 자료로 사용하여 모델을 학습하였으며, 모델을 통해 물리 정보 및 머신러닝 기반 강우 예측을 생성하였다. 이렇게 생성된cGAN 기반 모델 결과와 WRF 예측 결과를 결합하는 머신러닝 기반 blending 기법을 통해Hybrid 강우예측 결과를 최종적으로 도출하였다. 본 연구에서는 Hybrid 강우예측 모델의 성능을 평가하기 위해 수도권 및 안동댐 유역에서 발생한 호우 사례를 기반으로 최대 선행시간 6시간까지 모델 예측 결과를 분석하였다. 이를 통해 물리과정 기반 모델과 머신러닝 기반 모델을 결합하는 Hybrid 기법을 적용하여 높은 정확도와 신뢰도를 가지는 고해상도 강수 예측 자료를 생성할 수 있음을 확인하였다.

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Level of High School Physics Teacher's Understanding of Fundamental Physical Constants and Their Educational Application (기본물리상수에 대한 고등학교 물리교사의 인식 수준 및 교육적 활용 인식 연구)

  • Kim, Sung-Won;Lee, Soo-Jung;Choi, Sung-Youn
    • Journal of The Korean Association For Science Education
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    • v.31 no.6
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    • pp.848-863
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    • 2011
  • The purpose of this study is to explore how high school physics teachers perceive and understand fundamental physical constants as well as how they explain them and what methods they currently use in class. This study developed a questionnaire survey to recognize physics teachers' level of understanding of fundamental physical constants, which were measured by many scientists and contributed the to generation and improvement of scientific theories. Those questionnaire surveys were conducted among 130 high school physics teachers in Seoul, Gyeonggi, and Incheon. Among them, 124 participated in the survey and six were interviewed. The content of the survey consists of three parts: (i) basic questions about teachers, (ii) questions to measure the teachers' understanding of fundamental physical constants, and (iii) questions about the educational use of fundamental physical constants. The survey was distributed via e-mail, and respondents submitted their responses via e-mail as well. Semi-structured interviews were conducted for 30 minutes each, and all interviews were recorded, transcribed and analyzed twice.

The Actual Status of Physics Teachers' Perception on the Concept of Radiation (물리 교사들의 방사선 개념에 대한 인식 실태)

  • Park, Sang-Tae;Choi, Hyuk-Joon;Kim, Jun-Tae;Jung, Ki-Ju;Lee, Hee-Bok;Yuk, Keun-Cheol
    • Journal of The Korean Association For Science Education
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    • v.25 no.5
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    • pp.603-609
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    • 2005
  • Students obtain most concepts through textbooks, and teaching-learning activities between teachers and students. Accordingly, if science teachers already have misconceptions they will inevitably affect students' scientific concept. This study found many problems in teachers' cognition on the concepts of nuclear radiation. Because 12th grade physics II is classified as an optional subject in the 7th curriculum, teachers have few chances to teach it and, more importantly, have difficulty in teaching it because of the need to prepare students for the university entrance examination. The concept of radiation must be taught correctly because of its emergence in the 'environment' unit of 10th grade Science. Finally, results from this study can help science teachers teach these difficult concepts more correctly. In addition, results can also be useful in in-service retraining programs.

Development of Joint-Based Motion Prediction Model for Home Co-Robot Using SVM (SVM을 이용한 가정용 협력 로봇의 조인트 위치 기반 실행동작 예측 모델 개발)

  • Yoo, Sungyeob;Yoo, Dong-Yeon;Park, Ye-Seul;Lee, Jung-Won
    • KIPS Transactions on Software and Data Engineering
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    • v.8 no.12
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    • pp.491-498
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    • 2019
  • Digital twin is a technology that virtualizes physical objects of the real world on a computer. It is used by collecting sensor data through IoT, and using the collected data to connect physical objects and virtual objects in both directions. It has an advantage of minimizing risk by tuning an operation of virtual model through simulation and responding to varying environment by exploiting experiments in advance. Recently, artificial intelligence and machine learning technologies have been attracting attention, so that tendency to virtualize a behavior of physical objects, observe virtual models, and apply various scenarios is increasing. In particular, recognition of each robot's motion is needed to build digital twin for co-robot which is a heart of industry 4.0 factory automation. Compared with modeling based research for recognizing motion of co-robot, there are few attempts to predict motion based on sensor data. Therefore, in this paper, an experimental environment for collecting current and inertia data in co-robot to detect the motion of the robot is built, and a motion prediction model based on the collected sensor data is proposed. The proposed method classifies the co-robot's motion commands into 9 types based on joint position and uses current and inertial sensor values to predict them by accumulated learning. The data used for accumulating learning is the sensor values that are collected when the co-robot operates with margin in input parameters of the motion commands. Through this, the model is constructed to predict not only the nine movements along the same path but also the movements along the similar path. As a result of learning using SVM, the accuracy, precision, and recall factors of the model were evaluated as 97% on average.

A Study on Scientific Concepts and Teaching and Learning Methods in the Activities of the Nuri Curriculum Teacher Guidebooks for Ages 3-5 in Accordance with Themes (생활주제를 중심으로 본 3-5세 연령별 누리과정 교사용지도서 활동의 과학개념 및 교수학습방법 분석)

  • Choi, Hye Yoon
    • Korean Journal of Child Education & Care
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    • v.18 no.4
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    • pp.65-89
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    • 2018
  • Objective: The purpose of this study is to analyze the science concepts and teaching and learning methods presented in the science education-related activities of the Nuri Curriculum teacher guidebooks for ages 3-5. Methods: The research data included 772 activities related to science education in the teachers' guidebook. The analysis of science concepts was based on physical science (force and motion, physical structure, electricity and magnetism, light and shadow, sound properties), chemistry (material properties, material reaction), life science (organizational structure, growth and change, heredity and evolution, animal plant and human relationships), earth science (earth system interaction, earth system structure, and universe), engineering (designed world, engineering design, engineering, technology and society) and ecology (environment preservation). Teaching and learning methods were analyzed according to the types of small and large group activities and of free play activities. Results: Science concepts were mainly presented in the fields of engineering, chemistry, and life science commonly among children aged 3-5, whereas the concepts of physical science were lowly presented in all ages. Science concepts appeared mainly in the daily subjects of 'animal plant and nature', 'life tools', 'environment and life', and 'spring, summer, autumn and winter'. As the teaching and learning method, free paly activities (science area, free outdoor selection activity, math and manipulative activity) were mostly used for the ages of 3 and 4, and small and large group activities (cooking, story sharing, music activity) were for the age of 5. Conclusion/Implications: It is necessary to select the level of science area and concept that can be taught according to the age of children and the timing of the teaching.

Affordance Planning Strategy for Mathematics App development for Senior citizen using Smart-devices (스마트 기기 활용 시니어 수학 앱 개발을 위한 어포던스 설계 전략)

  • Ko, Ho Kyoung
    • Communications of Mathematical Education
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    • v.30 no.1
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    • pp.85-99
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    • 2016
  • The research was carried out to be part of a mathematics app stimulation that enables the elderly to learn mathematics by using Smart devices. Particularly appropriate method / function that leads to learning is very important for people who are not accustomed to Smart devices like the elderly. The research was conducted to build affordance strategy based on the consideration of characteristics of senior learners. It aims to achieve both the goals of education through mathematics learning materials provided by smart devices and also to improve user convenience. It suggests cognitive, physical and sensory features and factors to improve affordance of Smart learning system.

A Study on the Construction of School Electronic Library for Learning-Teaching Process (교수학습 지원을 위한 학교 전자도서관 구축 방안에 관한 연구)

  • Lee, Byeong-Ki
    • Journal of the Korean Society for Library and Information Science
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    • v.34 no.3
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    • pp.37-60
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    • 2000
  • Recent developments and integration of IT are expanding the possibility of various instructional learning methods in education environments. Contemporary learning theory such as open education, self-directed learning, student's centered learning describes the students as an active and engaged information user and underscores the importance of information literacy. Therefore, school library today focus on the process of learning-teaching process rather than dissemination information, and emphasized the focus of the school electronic library as information center. The purpose of this study is examined physical components of School Electronic Library, design a model of information system and suggests a strategy for implementing teaching-learning process support services based on school electronic library and information system.

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A Dynamic Inferential Framework for Learning Geometry Problem Solving (기하 문제 학습을 위한 동적 추론 체계)

  • Kook, Hyung-Joon
    • Journal of KIISE:Software and Applications
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    • v.27 no.4
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    • pp.412-421
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    • 2000
  • In spite that the main contents of mathematical and scientific learning are understanding principles and their applications, most of existing educational softwares are based on rote learning, thus resulting in limited educational effects. In the artificial intelligence research, some progress has been made in developing automatic tutors based on proving and simulation, by adapting the techniques of knowledge representation, search and inference to the design of tutors. However, these tutors still fall short of being practical and the turor, even a prototype model, for learning problem solving is yet to come out. The geometry problem-solving tutor proposed by this research involves dynamic inference performed in parallel with learning. As an ontology for composing the problem space within a real-time setting, we have employed the notions of propositions, hypotheses and operators. Then we investigated the mechanism of interactive learning of problem solving in which the main target of inference involves the generation and the test of these components. Major accomplishment from this research is a practical model of a problem tutor embedded with a series of inference techniques for algebraic manipulation, which is indispensable in geometry problem solving but overlooked by previous research. The proposed model is expected to be applicable to the design of problem tutors in other scientific areas such as physics and electric circuitry.

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