• 제목/요약/키워드: earth system

검색결과 4,132건 처리시간 0.037초

2009 개정 과학과 교육과정의 효과적인 실행을 위한 중학생들의 지구계에 대한 이해 (Middle School Students' Understanding about Earth Systems to Implement the 2009 Revised National Science Curriculum Effectively)

  • 이효녕
    • 한국지구과학회지
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    • 제32권7호
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    • pp.798-808
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    • 2011

  • 이 연구의 목적은 2009 개정 과학과 중학교 교육과정을 효과적으로 실행하기 위해 중학생들의 지구계에 대한 기초적인 인식을 조사하였다. 1219명의 학생들이 설문조사에 참여했으며 학생들의 지구계에 대한 기초적인 이해, 지구계와 관련된 23개의 개념(내용)에 대한 이해 수준과 중요성을 조사하였다. 지구계에 대한 기초적인 이해 결과를 살펴보면 약 67%의 학생들이 지구계에 대한 용어에 대해 잘 모른다고 응답하였다. 지구계의 구성요소 중에서는 대기권과 수권을 가장 잘 인식하고 있었으며, 빙권에 대해서는 지구계의 구성요소로서 낮은 이해 수준을 보였다. 23개 지구계 관련개념(내용)에서는 성별에 따라 통계적으로 유의미한 차이가 나타났으며, ESU#4, 5, 6에 관련된 주요 개념에서 남학생들이 이해 수준과 중요성에 대한 인식 수준이 더 높게 나타났다. 아울러, 학년별로는 23개 중에 10개의 개념에 대한 중요성의 인식 차이를 나타냈다. 교육과정의 실행과 학교 현장을 위한 제언이 논의되었다.

  • https://doi.org/10.5467/JKESS.2011.32.7.798 인용 PDF KSCI

궤도회로에서의 공동접지와 단독접지 인터페이스 (Interface between Common earth and Individual earth on the Track circuit)

  • 이길노;김용규;김종기;김학련
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2005년도 추계학술대회 논문집
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    • pp.269-274
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    • 2005

  • This paper is studied on earth network configuration when common earth is applied to electrified railway system. And the permitted capacity of buried earth cable used for configuring common earth network and application plan of existing individual earth system when common em1:h network is applied to existing electrification line improvement are studied. For this, the configuration of common earth network is examined according to the SNCF regulation, and the interface between common earth and individual earth is analysed on the basis of the existing track circuit used in electrified line.

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SBF Conceptual Representation을 활용한 초등학교 6학년 학생들의 자연현상 개념 분석 (An Analysis of the Conceptions about the Nature Phenomenon Using SBF Conceptual Representation in the 6th Students)

  • 문병찬;김해경
    • 대한지구과학교육학회지
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    • 제3권1호
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    • pp.1-8
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    • 2010

  • The purpose of this study was to analysis the 6th students' conceptions of the nature phenomenon focused on the systematic characteristics. For this study, 12 students of the 6th grades participated in special class for testing their conceptions about the water cycle in the earth system. And we analyzed the outcomes of students' conceptions based on SBF conceptual representation. The results indicate that most of the subjects perceived that the water cycle in earth system wasn't complex system maintaining its existence and functions as a whole through the interaction of its parts but simple system maintaining some actions between atmosphere and hydrosphere, geosphere, biosphere(biological world). And they didn't perceive the characteristics of the water cycle whose all parts must be presented the change of volume between vapor and water, glacier proposing the total hydro-volume are established in the earth system. Based on the results, it was suggested that the main goals of the schools' science education should be to provide students who understand the water cycle system as attaching importance to form with the skills needed to coherent understanding of the essential qualities for the nature phenomenon system.

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EnergyPlus를 이용한 수평형의 지열 히트펌프와 어스튜브를 조합한 시스템의 성능 검토 (Performance Analysis on Combined Horizontal Ground Source Heat Pump with Earth tube using EnergyPlus)

  • 조성우
    • 한국지열·수열에너지학회논문집
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    • 제13권2호
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    • pp.22-29
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    • 2017

  • This study is performed to performance of the combined system the GSHP (Ground Source Heat Pump) system with the Earth tube system using EnergyPlus program. The Earth tube system using fan is characteristics as supply lower (higher) air temperature than outdoor air temperature in cooling and heating seasons, the GSHP system is characteristics as small indoor air temperature variation range. As the results of Earth tube + GSHP system simulation, GSHP power can be reduced than the GSHP single operation as 17.3% in cooling seasons and 32.5% in heating seasons, the GSHP design capacity can be replaced more small size.

  • https://doi.org/10.17664/ksgee.2017.13.2.022 인용 PDF KSCI

The Impact of a Professional Development Program on Urban Teachers' Lesson Planning Using Urban Geologic Sites

  • Nam, Youn-Kyeong
    • 한국지구과학회지
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    • 제32권5호
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    • pp.474-484
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    • 2011

  • This study presents how a professional development program (PD) of K-12 teachers affects participants' use of the earth system approach and their perceptions of using the urban environment for their science teaching and lesson unit development. This study utilized mixed methods to collect and analyze the data. Eleven urban teachers' pre-post lessons (45 lessons) were analyzed quantitatively using a lesson plan analysis tool, modified by the author, and their lesson reflections were analyzed qualitatively. The findings of this study show that the PD program influences the teachers to choose more topics and content knowledge based on the earth system approach and to assess the topics and content knowledge with more appropriate methods. Specifically, the teachers use more urban environmental factors/topics in their post lesson to teach the environmental topics of urban area. However, according to the statistical analysis of pre-and postlesson plan scores, the accuracy of the earth system knowledge that participants used in their lessons did not change significantly (p<0.05) (Table 4), which means that the PD program did not affect the improvement of the teacher's content knowledge in earth system science. Implications of this study are discussed.

  • https://doi.org/10.5467/JKESS.2011.32.5.474 인용 PDF KSCI