• 제목/요약/키워드: earth-based view

검색결과 110건 처리시간 0.037초

고등학교 지구과학 교과서에 제시된 판 이동의 주된 원동력에 대한 고찰 (A Study on the Dominant Driving Force of Plate Movement presented in the High School Earth Science Textbooks)

  • 전태환;서기원;이규호
    • 한국지구과학회지
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    • 제37권1호
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    • pp.62-77
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    • 2016
  • 초기의 판 구조론에서 지각 판은 연약권 위에 떠서 맨틀의 움직임에 따라 움직이는 수동적인 모습으로 그려졌고, 자연히 해령에서 발산되는 힘이나 암석권 하부의 맨틀 견인력(drag force)이 판을 움직이는 주된 원동력으로 묘사되었다. 하지만 최근 여러 연구들은 판의 이동을 일으키는 원동력이 맨틀의 대류보다는 섭입대에서 침강하는 판이 만드는 섭입판 인력(slab pull)이라고 보고 있다. 최근 학계는 무거운 해양판과 주변 연약권의 밀도 차이가 섭입판 인력의 핵심이라고 설명한다. 해양판의 높은 밀도는 중력에 의해 판이 해구에서 맨틀 속으로 가라앉는 원인이 되며, 이것이 판이 움직이는 가장 큰 원동력을 발생시키는 것이다. 이러한 연구 결과들을 바탕으로, 본 연구는 고등학교 지구과학 교과서의 관련 내용을 검토하고 최근 수십 년 간의 서술 경향을 분석하였다. 그 결과 5차 교육과정 이래로 지금까지 거의 대부분의 고등학교 교과서가 맨틀 대류를 판 이동의 주 원동력으로 서술하고 있다는 것을 확인하였으며, 이는 대학교 교재가 개정판을 통해 새로운 학설을 꾸준히 제시해온 것과 대조적인 모습이라 할 수 있다. 따라서 학생들에게 더욱 정확한 학술적 정보를 제공하기 위해 이와 같은 새로운 판 구조론 내용이 해당 교과서 관련 단원에 추가되어야 할 것이다.

동양적 세계관의 관점에서 본 한국도시경관의 특성 (A Study on the Characteristics of Korean Townscape in Perspective of the Oriental World View)

  • 김한배;이규목
    • 한국조경학회지
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    • 제21권4호
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    • pp.55-68
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    • 1994
  • It has been generally agreed that the city form especially in the preindustrial age resembled their own world view, either in the western or the eastern cultural sphere. So, we aimed to redefine the characteristics of oriental world views compared with the western one, in order to find the relative nature of the Korean townscapes. It is said that the both world views(of western and oriental) are composed of the contrastive binary concepts in common, but there seems to have been nearly contrary differences in these two world views. Wheareas the former was based on the passively segregational and oppositional dualism, the latter, on the dynamically harmonious and complementary dualism, called generally as 'Yin(陰) and Yang(陽)'. Thus, the oriental world view can be thought as the 'philosophy of the relationship', which aim to unify the dualism ultimately with the help of this relationship. So, we can assume a certain third and intermediate concept between these dual concepts of the world view, which can unify these two into the one holistic whole. And the focuses of the most traditional oriental philosophies were concentrated on this, so called, 'the third concept', namely Taoistic 'Tochu(道樞)', Buddhistic 'Kong(空)' or Confucian 'Chung(中)'. And this triple concept, including the third one, of the oriental world view revealed a more concrete form of the cosmological relationship, as the triple structure; 'Heaven(天), Earth(地), and Man(人)', in which the 'Man' is thought as the middle or the center of the world. In this manner, we could found this oriental 'triple world view' was revealed in the real topology of most places in the Korean traditional city and the whole townscape itself. So, in the scale of houses and the roads around them, we can construe the 'Maru(a central board-floored room)' and the 'Madang(a inner court)' as the 'third and intermediate space(中)' between the interior space(陰) and exterior space(陽) in the former, and between the private house(陰) and the public residential road(陽) in the former case, and between the dual parts(陰,陽) of the city representing the contrary social classes and the contrastive visual landscapes. So, we insist that this 'triple world view' represented in the townscape can be one of the most important characteristics of Korean traditional townscape. And this third intermediate spaces, which generate the active social contact and the harmonious relationship among the people, can be the most important cues, as the central places, in the interpretation of the Korean townscapes even in contemporary circumstance, which inherits its spatial and social frame more or less from the preceding one.

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PC기반 8채널 해양 탄성파탐사 시스템을 이용한 고해상 천해저 탐사 (High-resolution Shallow Marine Seismic Survey using a PC based 8-channel Seismic System)

  • 김현도;김진후
    • 한국지구물리탐사학회:학술대회논문집
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    • 한국지구물리탐사학회 2005년도 공동학술대회 논문집
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    • pp.187-194
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    • 2005
  • PC기반의 8채널 해양 탄성파탐사 시스템을 개발하여 천해저 기반암 매핑에 적용시켜 보았다. 본 시스템은 PC에 탑재된 아날로그 신호처리기와 디지털 변환기, 그리고 그룹간격 5 m의 스트리머로 구성되어 있다. 이 시스템은 시스템을 제어하는 자료취득 프로그램과, 자료처리 소프트웨어에 의해 구동된다. PC기반 천해저 해양 탄성파탐사 시스템으로 적절한 자료처리 과정을 거쳐 신호 대 잡음비가 향상된 고해상 2차원 지층 단면도를 작성할 수 있었다.

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Analysis on How to Locate the Maximum Line Voltage to Hull in Steady State on the Vector Diagram Onboard Vessels

  • Choi, Soon-Man
    • Journal of Advanced Marine Engineering and Technology
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    • 제35권7호
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    • pp.966-973
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    • 2011
  • Power distribution onboard vessel is typically configured as ungrounded system due to the ability to continuously supply electric power even when an earth fault occurs. The impedance connections between 3 phase power lines and hull cause the line-to-hull voltages to become unstable and increased in case the impedances are unbalanced, bringing the situation susceptible to electric shock and deterioration of insulation material. Also the line-to-hull voltage can reach to a certain maximum value in the steady state depending on the distributed capacitances and grounding resistances between lines and hull. This study suggests how to find and calculate the maximum line-to-hull voltage in view of magnitude and phase angle based on the vector diagram.

DETECTION OF DUST LOADED AIRMASS IN SEAWIFS IMAGERY: AN EMPIRICAL DUST INDEX IN COMPARISON WITH MODEL-PREDICTED DUST DISTRIBUTION OVER THE PACIFIC IN APRIL,1998

  • Fukushima, H.;Schmidt, M.;Sohn, B.J.;Toratani, M.;Uno, I.
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 1999년도 Proceedings of International Symposium on Remote Sensing
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    • pp.89-94
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    • 1999
  • The paper first proposes an empirical algorithm for detecting dust-loaded airmass observed by Sea Wide Field-of-view Scanner (SeaWiFS). The proposed dust index formula is based on the curvature of the spectral reflectance estimated from the SeaWiFS band 4 (510 nm band) through band 8 (865 nm band) data, assuming "clear ocean water" reflectance. Evaluation of the algorithm is made over several typical Asian dust images including the ones over the Pacific in April, 1998, when a major dust event was reported. The study analyzes the performance and the characteristics of the algorithm by comparing the satellite-derived dust index images with contemporaneous columnar concentration of dust particles predicted by a numerical dust transport model. The comparison reveals several small-scale differences although their dust distribution patterns show good agreement generally.

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제한된 부지에서 위험전압 검토에 의한 메시 접지설계 (Mesh Grounding Design Based on the Study of Dangerous Voltage on Limited Sites)

  • 손석금;김재철
    • 조명전기설비학회논문지
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    • 제25권11호
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    • pp.91-97
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    • 2011
  • In Korea, characterized in most cases by limited area or high earth resistivity, it is likely to design narrow distances between grounding conductors, with a view to keeping ground resistance and touch voltage below the safety margin values. A new grounding method is suggested, making use of double meshes, to lower touch voltage in a confined area, since it is difficult to lay the plugs under the ground with narrow gaps between them on a limited site. For the presentation of a new model, the suggested grounding system has been analyzed and studied in ground resistance, touch voltage and step voltage, using IEEE Std. 80 calculations and computer simulations.

전통사상(專統思想)과 서원건축배치(書院建築配置)의 구성(構成) 원리(原理) (Composition Principle of Seo-Won Architecture from the View of Its Disposition and Korean Traditional Thought)

  • 박정해;한동수
    • 교육시설 논문지
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    • 제18권6호
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    • pp.33-43
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    • 2011
  • The Korean academics of classical learning, Seowon which from the middle of Joseon Dynasty was complexly reflected in "the illustration of Taiji(太極圖說)" Five-Elements school(陰陽五行說), "Zhou Yi(周易)" and a theory on spherical heaven and square ground(天圓地方) which based on orientalism. Also the theory of Xiangshu Xue(象數學) was a significant factor to decide the size(number of facade module) of Seowon architecture. So, in this study, how the oriental thought was adopted and reflected in existing 21 Seowon in South Korea. The size of Seowon architecture was adopted a theory of combination with heaven, earth and human(天地人三合論) that based on the theory of Xiangshu Xue on "the illustration of Taiji" and "Zhou Yi". "Zhou Yi" was the central thought of Confucian culture in Joseon Dynasty, with which Seowon space was divided into two, ancestral rites space and lecture space. It coincides with balance of yin(陰) and yang(陽), Five-Elements(五行) and four seasons(四季節). In lecture space, lecture hall is relevant with the water(水) and winter, and front tower structure or outer three-door is the fire(火) and summer. Also, central garden means the soil(土) and center. Thus, the size and spatial composition was planned with the philosophy, "the illustration of Taiji", Five-Elements school and a theory on spherical heaven and square ground. Yin and yang has an idea of the heaven and earth, and Five-Elements has an idea of direction and season with which spatial composition of Seowon could be set. And the numeral meaning on the theory of Xiangshu Xue established an ideal background for spatial composition of Seowon architecture.

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인과지도를 통한 창의성검사 방안 탐색 (The Exploring of the Device for Creativity Estimating Applied Causal Maps)

  • 문병찬
    • 한국시스템다이내믹스연구
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    • 제12권1호
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    • pp.131-153
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    • 2011
  • The purpose of this study is to explore the applicability of the causal maps for estimating creativity. This study assumes that fluency, flexibility, originality and elaboration are elements of creativity; and there are common characteristics between systems and creative thinking. For this study, 30 students from the 5th grade create causal maps which are consisted of the contents of 'the water cycle in the earth'. The causal maps are analyzed and evaluated by focusing on the characteristics of creativity. In way of the marking causal maps based on creativity, each word is scored as 1 point on the basis of 30 points for fluency. Each word which is linked more than one word is scored 3 points for flexibility, but the maximum points are limited as 35 points. In originality, if it is approved each word is worthy as well as originality, it is scored as 10 points on the basis of 40 points. Lastly, each number of cycle loops is scored as 15 points for elaboration, and the maximum scores are limited as 45 points. As is stated above, the limiting of the maximum scores are designed based on corresponded to 10% students of participators. In the result of this study, the students' scores of evaluating creativity applied causal maps show similar patterns from relative point of view to the other results which were evaluated the creativity by credible organ. Consequently, it is recognized that the causal maps have the possibility of being able to estimate quantitatively the creativity.

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과학 교육 개혁 운동에 관련된 보고서 분석을 통한 과학 성취 개념의 재정의 (Science Achievement: Synthesis of Current Conceptions in Major Reform Documents in the United States and Korea)

  • 백성혜;이옥희
    • 한국초등과학교육학회지:초등과학교육
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    • 제18권2호
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    • pp.1-19
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    • 1999
  • Based on the analysis of commonalities and differences in the views of science achievement in major reform documents in the United States and Korea, an aggregated view of science achievement is presented in this paper Science achievement is conceived of in terms of science content and science process. The components of science content include: (a) concepts and theories I n physical, life, and earth and space science;(b) science, mathematics, and technology;(c) science in personal and social perspectives;(d)history and nature of science;and (e) unifying themes. The components of science process include: (a) scientific understanding;(b) scientific investigation;(c) scientific communication; and (d) scientific habits of mind. The components of science process.cut across and intersect with the components of science content. The components of science achievement overlap and are related to one another. Despite such an overlap, understanding the rot e that each component plays provides insight into its unique contributions as well as its interactions with other components. A definition of science achievement and identification of its components based on major reform documents provides a guideline for science assessment as well a s science teaching and learning.

과학관 전시의 교육 과정 반영에 대한 평가 기준 개발 및 적용 - 초등학교 지구과학 내용을 중심으로 - (The Development and Application of Assessment Standards for the Reflection of Science Museum Exhibitions in the Curriculum: A Case Study of the Contents of Earth Science in Elementary School)

  • 이창진;류춘렬;신명경
    • 한국지구과학회지
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    • 제28권7호
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    • pp.803-810
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    • 2007
  • 이 연구의 목적은 과학관 전시의 교육 과정 반영에 대한 평가 기준을 개발하고 적용하는 것이다. 이 목적을 구현하기 위하여 초등 과학과 지구과학 성취기준에 근거한 평가 기준을 개발하였고 이를 국립중앙과학관 전시에 적용하여 과학관 전시의 교육 과정 반영도와 평가 척도를 측정하였다. 연구결과 국립중앙과학관의 초등 과학과 교육 과정 중 지구과학 내용의 반영도는 52%이고 평가 척도는 3.53으로 평가되었다. 특히 지질 영역과 천문 영역에서는 높은 반영수준을 보였다. 이러한 결과는 국립중앙과학관이 비형식 교육 기관으로서 학교 과학 교육과 비교적 잘 연계되고 있음을 보여준다. 과학관은 학교 과학 교육과 연계되어야 하며, 그 과정은 과학관이 교육 과정을 충실히 반영하는 것으로부터 시작되어야 한다. 이를 위해 과학관이 교육 과정을 반영하는데 지표가 될 기준이 필요하다. 이러한 관점에서 이 연구의 결과는 과학관과 학교 과학 교육의 연계 수준을 진단하고 발전 방향을 설정하는데 필요한 기초 자료로 이용될 수 있을 것이다.