• Journal of The Geomorphological Association of Korea
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• v.19 no.3
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• pp.153-163
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• 2012

The Earth's surface deforms vertically in response to a variety of sources relating to lithospheric and sub-lithospheric processes, and distinguishing the continental mechanisms for vertical motions of the lithosphere remains a fundamental challenge in geosciences. A key prerequisite to the challenge is documentation of the temporal and spatial pattern of vertical motions in different tectonic settings. This study is aimed at elucidating the geodynamic factors that can contribute to vertical motions of the Earth's surface in intraplate continental settings including the Neogene uplift in the Korean peninsula based on numerous recent achievements in relevant fields. Ultimately, deciphering the interplay between the Earth's surface and the Earth's interior processes leads us to the notion of "the importance of geomorphic landscape" as a prism to view the dynamics of the Earth's inside.

• 한국지구과학회:학술대회논문집
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• 2010.04a
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• pp.32-33
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• 2010

달의 기조력에 의한 조석현상으로 인하여 지구의 자전속도가 늦어지고, 결과적으로 층상구조를 이루고 있는 지구의 내부는 서로 다른 각속도로 자전한다는 차등자전 개념이 최근에 도입되었다. 지구내부의 각층에서 차등자전이 일어날 경우 각층의 경계면에서는 필연적으로 마찰열과 마찰 정전기가 발생하는 바, 특히 맨틀과 외핵의 경계부분에서 발생하는 마찰전기는 방전과정에서 대규모의 자기장, 즉 지구자기장을 발생시킬 것으로 예측된다. 본 연구에서는 마찰전기를 지속적으로 발생시키는 실험 장치를 개발하고, 고감도 자기센서로 자기장의 변화를 측정하였다. 실험 결과 유의미한 자기장의 변화를 측정하였고, 지구 자기장이 차등자전으로 인한 마찰전기에 의해 발생될 수 있음을 확인하였다.

• Journal of the Korean Geographical Society
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• v.33 no.1
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• pp.41-56
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• 1998

The main purpose of this study is to delimit the boundary of central business district and to describe the internal structure of CBD in Seoul. To delimit the CBD boundary, we used the locational matrices of main CBD functions, which were ofganized through fieldworks. CBD functions are classified into 20 categories. They are retail sales, corporation managements, administration managements, business, and unclassified services, customer(personal)services, and manufacturings. The core area of CBD in Seoul is at Chongro and Chung Gu area that shows the locational consistency comparing to 1970s. Although the boundary is slightly expanded into west, south and east, the extent of horizontal expansion in CBD can be negligible comparing to the remarkable growth of Korean economy after 1970s. The reasons why CBD showed little expansion can be found out from the process of restructuring in Seoul metropolitan area, such as the growth of subcenters, decentralization of central functions, construction of highrise buildings, redevelopment in central area and so on. Internal structure of Seoul's CBD shows 5 specialized functional subdistricts. They are CBD core area, subdistrict of department and office functions, retail sales, customer services and light manufacturings.

• Proceedings of KOSOMES biannual meeting
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• 2006.11a
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• pp.131-135
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• 2006

The objective of the project is to model and study the geomagnetic field structure and its secular variation in space and in time due to sources in the dynamic fluid outer core. the Earth's spherical harmonic model of the main field and of the secular variation gives the intensity and geomagnetic structure at any location around the Earth, assuming an undistorted, steady state field that no external sources or localized earth anomalies. To consider the practical use of a ship's digital compass in Earth's magnetic field, Earth's spherical harmonic model is searched for the related practical methods and procedures as a basic study in this work.

• Journal of the Korean earth science society
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• v.28 no.3
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• pp.266-276
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• 2007

This purpose of this study was to analyze high school students' alternative conceptions and understanding levels about rocks, crust, plate tectonics and interior of the Earth. Data were collected through surveys, drawing assignments, and interviews. A total of 158 high school students in the first grade were involved in this study. The results showed that students have lots of major alternative conceptions which are meaning and forming process of rock, distinction of continental crust and ocean crust, formation and disappearance of ocean crust, movement of plate, continental drift, activities of volcano and earthquake. Physical and chemical characteristics, including mantle and core state could be found through analyzing from drawings.

• Journal of the Korean earth science society
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• v.28 no.6
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• pp.645-654
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• 2007

The purpose of this study was to investigate students' mental models and alternative conceptions about the Earth's interior. A total of 126 10th grade students participated in this study. They were requested to draw Earth's interior tasks and were interviewed about their mental models. A coding frame was designed to classify the students' drawings and interview responses, and then a four step cognitive model was established based on the frame of coding. In addition, the relationship of mental models was compared in terms of students' gender, and the type of alternative conceptions was analysed. The research results showed a variety of alternative conceptions on the interior of the Earth. The classified mental models showed naive mental model (11%), unstable mental model (81%), conceptual model (8%), while 69% of all sampled students accounted for the static process. The gender difference in the cognitive model showed no statistical significance.

• 에너지협의회보
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• s.28
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• pp.17-45
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• 1993

• 산림경영
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• s.118
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• pp.2-7
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• 1996

• 한국지구과학회:학술대회논문집
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• 2010.04a
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• pp.104-105
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• 2010

울산 퇴적 분지에 분포하는 신현층의 이암층 노두에서 이매패에 속하는 Anadara 를 비롯한 여러 종류의 연체동물 화석을 채집하였다. Anadara 화석은 해성 기원의 연체동물로 Vicarya japonica Yabe and Hatai와 함께 소위 Vicarya-Anadara 군집에 속한다. 이 군집은 우리나라의 제3기 생층서를 이해하는데 가장 중요한 정보를 제공한다. 여기에서는 Andara 화석의 형태적 특징과 내부 구조를 고찰하고, 현생종과 비교하였다. 신현층에서 산출된 Anadara 화석은 1속 2종으로 구성된다. 각의 형태적 특징은 각의 외형이 삼각형에 가깝고, 표면에 25~30개의 방사륵이 발달해 있으며 인대면은 삼각형 모형으로, 교치선은 직선이다. 각의 내부 구조를 박편상에서 관찰한 결과, 4개의 층으로 구성되어 있다. Anadara 화석과 현생종 Scapharca subcrenata 을 비교한 결과, 각의 외형은 조금 다르나 내부구조는 서로 거의 유사하다. A. (H.) kakehataensis의 내부 구조는 최외층, 외층, 광휘층, 내층으로 구성되어 있다. 외층은 교차판 구조(crossed- lamellar structure)로 되어 있다. 또한 성장선이 발달되어 있으며, 복연부에 불규칙한 균열이 부분적으로 나타난다. 이는 외부로 노출되어 건조되고 다시 물기를 머금은 상태가 반복되어 수축 팽창에 의한 것이라고 생각되며, 별개의 층은 아니다. 내층은 엽상구조(foliated structure)가 관찰된다. 외층과 내층 사이에 아라고나이트로 구성된 광휘층이 나타나며, 능주 구조(prismatic structure)를 보이는 얇은 층이다. 최외층이 나타난다. A. (H.) daitokudoensis의 내부 구조는 A. (H.) kakehataensis와 서로 거의 유사하고, 내층, 외층, 광휘층 및 최외층의 4개의 층으로 구성된다. 엽상 구조인 내층, 교차판 구조인 외층, 능주 구조인 광휘층 및 최외층은 유기질층으로 되어있다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.4
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• pp.1880-1888
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• 2012

This study tried to analyze traffic assignment volume by application of land use patterns and transport policies in District Unit Design. It is postulated a Toy network and various scenarios which are combined land use patterns and transport policies for analyzing change of assignment volume. As results, this study shows best District Unit Design technique is the policy that develop mid block and introduction of car free zone to inner 2 way streets. Worst design technique is the policy that introduction of joint car parking to mid block. And also worst design technique to residents who are living in inner block is the policy that just develop only one center zone.