• 제목/요약/키워드: land structure

검색결과 1,164건 처리시간 0.029초

Numerical Study on the Behavior of Ground and Structure in Geosynthetic-Reinforced Soil (GRS) Integral Bridges

  • Sim, Youngjong;Jin, Kyu-Nam;Hong, Eun-Soo;Kim, Hansung;Park, Jun Kyung
    • 토지주택연구
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    • 제12권3호
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    • pp.97-108
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    • 2021
  • 교대구조물에서는 교대 배면의 성토체 축조로 인한 수평방향응력의 증가로 인한 측방유동문제 및 구조물에 작용하는 온도하중 등의 영향으로 인해 접속슬래브, 거더, 베어링등의 파손이 빈번히 발생되고 있는 실정이다. 이에 대한 대책공법으로 보강토 일체형 교대(GRS (Geosynthetic-Reinforced Soil) integral bridge)가 제안되었다. 보강토 일체형 교대는 GRS 보강토 옹벽과 일체형 교대의 구조형식을 혼합한 형태의 구조물이다. 본 연구에서는 기존 PSC 거더교, 기존 보강토 일체형 교대 및 브라켓형 보강토 일체형 교대(새롭게 개발된 LH형 GRS 보강토 교대)의 시공순서와 지진하중조건을 고려하여 수치해석을 실시하였다. 그 결과 브라켓형 보강토 일체형 교대가 다른 구조물에 비해 응력집중과 교대·뒷채움간 부등침하 영향에 의한 기초지반의 변형에 대해 가장 유리한 것으로 파악되었다. 더 나아가 GRS 보강토 일체형 교대(브라켓형 포함) 구조물은 내진안정성에서도 가장 안정한 것으로 파악되었다.

미세 형상을 갖는 DVD-RAM 기판의 성형에 관한 연구 (Fabrication of the Micro-structured DVD-RAM Substrates)

  • 문수동
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2000년도 춘계학술대회논문집
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    • pp.167-170
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    • 2000
  • Recently the sub-micron structured substrates of 0.74 ${mu}ell$ track pitch and 800 $\AA$groove depth are required for DVD-RAM and the track pitch is expected to be narrower as the need for the information storage density is getting higher. For the accurate replication of the land-groove structure in the stamper to the plastic substrates it is important to control the injection -compression molding process such that the integrity of the replication for the land-groove structure is maximized. in the present study polycarbonate substrates were fabricated by injection comression molding and the land-groove structure regarded as one of mold temperature and the compression pressure on the integrity of the replication were examined experimentally. An efficient design methodology using the response surface method (RSM) the central composite design(CCD) technique and the analysis-of-variance (ANOVA) was developed to obtain the optimum processing conditions which maximize the integrity of the replication with a limited number of experiments.

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T. S. Eliot의 "The Waste Land"에 나타난 주제와 형식 (Theme and Form in T. S. Elopt's "The Waste Land")

  • 양현철
    • 영어어문교육
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    • 제4호
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    • pp.249-267
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    • 1998
  • "The Waste Land" is Eliot's best known poem. It was first published in 1922 and became a famous poem in modem poetry by the 1940's. The poem is a statement of his personal experience with spiritual crisis, this simple outline is complicated and universalized by being set within the structure of 'the Fisher King legend'. The fisher King legend was studied by Miss Weston in From Ritual to Romance and Sir James Frazer in The Goldon Bough which traced the vegetation myths. It explained the cycle of the seasons in relation to the death and rebirth of a god. The god died in the winter with the death of the vegetation and was reborn in the spring with the rebirth of the vegetation. Sir James Frazer reaced these ancient rituals within the Christian world. He indicated that the death and rebirth of Christ falls within the pattern of this ancient ritual. Also Miss Weston transformed that ancient ritual into Christian terms, and connected it with the Quest for the Holy Grail. Eliot used not only the title, but the plan and a good of the important symbolism of the poem from these two books. "The Waste Land" is a difficult one because of the numerous interruptions in the narrative. On the superficial level, the story covers a 12-hour period in a day. It is also in "the stream of consciousness." It might be called the internal monologue; that is, "the free association of ideas in the mind of the narrator," Eliot experiments with both the idea of time and with the stream of consciousness, He employs a number of quotations and allusion from the Classic literature. So, his technique in "The Waste Land" consists of the juxtaposition of the present with mythcism and religious symbolism derived from the past. The structure of the poem is built out of the contrasts in time. The poem illustrates his conception of the past as an active part of the present. "The Waste Land" has "a symphonic structure" composed of five parts, which are linked by the repeated themes. The theme is the death and salvation of the Waste Land. It is drawn from the Fisher King myths. Moreover, he has absorbed into the structure of this poem the language, phrases, and associations of other writers. It gave the poem the universality both of theme and of pattern. Also, his intricate and fine techniques added the universality to the poet's personal material. At last, the verse pattern of the poem follow the same basic structure as the thematic patterns. Again in symphonic style, the verse varies from section to section. The interruption of real time is associated with the flow of consciousness. Though the poem is a complex structure, there are the interweavings of a great deal of ideas into a simple, brief statement. By these poetic techniques the poem manages to have good harmony and unity between the thematic pattern and narrative structure. "The Waste Land" therefore, became the greatest poem in the 20th century modern world.

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20세기 초 원마산(原馬山) 도시공간의 복원적 연구 -1912년을 기준으로- (A Reconstructive Study on the Urban Structure of the Original Masan Early in the 20th Century)

  • 허정도;이규성
    • 건축역사연구
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    • 제9권1호
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    • pp.27-46
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    • 2000
  • This study aims at examining the background and development process of Masan city after Koryo Dynasty, making a reconstructive map of Original Masan using the first registration maps made in 1912 and analyzing the urban structure of the Original Masan area. The origin of Masan city went back to Koryo dynasty. Around 1040 Koryo government placed an official shipping facility in Masan to transport the taxed grain to the capital city. After that Masan became an important port covering the southern part of KyungSang-Do. And the urbanization of the Original Masan began to bud after a shipping facility was again established by the Chosun Dynasty in 1760 and strengthened in the 19th century after the social standing system was broken and many peasants moved to cities as daily workers. In 1899 Masan was forced to be opened to foreign powers and they placed an international settlement distanced from the area(Original Masan). After this many Japanese advanced to the international settlement and further to the area. The advancement of Japanese brought a critical change in the urban structure of the area. Land was owned by Japanese and many modern sysytems were introduced such as modern buildings, new roads, railroad and modern factories. According to the reconstructive map of the area, 80.5% of land lots are less than $200m^2$ showing the size of each land lot is comparatively small. And Japanese occupied 31.5% of the land in the area. Their land was located on the stratigic points near the port and the center of commerce. The ratio of the road area to the whole land was around 14%, not so low for urban areas in that time. The reconstructive map reveals the exact coastline of the year 1912 erased now due to filling the sea and extending the land, Present Masan city has been developed having the Original Masan as its nucleus. The area has been always the center of urban activities for Masan city. Making an exact reconstructive map for the area and analyzing the urban structure of the area in 1912 is a very important work to understand Masan city wholy.

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The Type setting and Application of the New-hanok type Public Buildings - Focused on Cases were completed after 2000 -

  • Park, Joon-Young;Kwon, Hyuck-Sam;Cheong, So-Yi;Bae, Kang-Won
    • KIEAE Journal
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    • 제15권5호
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    • pp.47-57
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    • 2015
  • Purpose: The purpose of this study is to set the type of 'the New-hanok type Public Buildings' through a case study for the hanok public buildings completed after 2000 years, and to analyze planned properties of the type. This is significant Establishing legal status of 'the New-hanok type Public Buildings' and seeing review of application possibilities of the type for providing a systematic government support measures of 'the New-hanok type public buildings' when models developing future. Method: Method of research is the first to examine the current laws and established the definition and legal status of 'the New-hanok type Public Buildings'. Followed by Setting the type classification criteria as to classify the type of 'the New-hanok type public buildings' and research architectural overview of selected cases by Literature, Internet searches, etc. After systematizing of the types classification of analysis cases, Characteristics of the type of the building structure looks catch classify in spatial structure, function, beauty. Finally, review application possibilities of the type for systematic government support measures establish when models developing of 'the New-hanok type Public Buildings' through a comprehensive analysis. Result: Selected cases were categorized as 3 types according by structural standard based on the core concept of 'the New-hanok type Public Buildings' set in this study. This can be divided into 'Wooden Structure type' and 'Composite structure - Convergence type' and 'Composite structure - juxtaposed type', 'Wooden Structure type' was re-classified by divided into '(1)Traditional Korean Wooden Structure' and '(2)Laminated Wood Wooden Structure'.

Land Suitability Analysis using GIS and Satellite Imagery

  • Yoo, Hwan-Hee;Kim, Seong-Sam;Ochirbae, Sukhee;Cho, Eun-Rae;Park, Hong-Gi
    • 한국측량학회지
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    • 제25권6_1호
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    • pp.499-505
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    • 2007
  • A method of improving the correctness and confidence in land use classification as well as urban spatial structure analysis of local governments using GIS and satellite imagery is suggested. This study also compares and analyzes LSAS (Land Suitability Assessment System) results using two approaches-LSAS with priority classification, and LSAS using standard estimation factors without priority classification. The conclusions that can be drawn from this study are as follows. First, a method of maintaining up-to-date local government data by updating the LSAS database using high-resolution satellite imagery is suggested. Second, to formulate a scientific and reasonable land use plan from the viewpoint of territory development and urban management, a method of simultaneously processing the two described approaches is suggested. Finally, LSAS was constructed by using varieties of land information such as the cadastral map, the digital topographic map, varieties of thematic maps, and official land price data, and expects to utilize urban management plan establishment widely and effectively through regular data updating and problem resolution of data accuracy.

Subway Network Expansion and Spatial Restructuring of Accessibility in Seoul

  • Lee, Keum-Sook
    • 지역연구
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    • 제11권2호
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    • pp.53-63
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    • 1995
  • Changes in transport are reflected in the accessibility of a place, which is denoted as the inherent advantageous characteristics of a place with respect to overcoming spatial friction, and affect the land use ultimately. A composite accessibility measurement scheme is developed and applied to the subway network in Seoul, which has been constructed in 1972. Changes in the transport network are reflected in the spatial structure of accessibility and affect ultimately the land use pattern. Therefore, it is of relevance to examine the changes in the spatial structure of accessibility, which allows to forecast the direction of changes in the land use pattern.

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공간구문론을 이용한 공간구조와 공시지가 변화 분석 (Analyzing the Changes of Spatial Structure and Officially Assessed Land Price by Using Space Syntax)

  • 조정훈;문태헌
    • 한국지리정보학회지
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    • 제19권1호
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    • pp.43-52
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    • 2016
  • 지가는 도시의 사회 경제적 특성을 함축적으로 표현하면서 도시공간이 가지는 종합적인 성격을 내포하고 있다. 따라서 지가는 각종 도시개발사업에 의한 공간구조와 지역의 사회경제적 변화를 부분적으로 파악하는 지표로 활용할 수 있다고 할 것이다. 본 연구에서는 도로 개설과 같은 도시의 물리적 공간변화에 따른 지가의 변화를 연구해 보았다. 방법론적으로는 도시공간구조를 종합적으로 해석할 수 있는 공간구문론(Space Syntax)을 도입하여 도로망 형태와 지가와의 관계를 회귀분석으로 파악하고, 도로망 변화에 따른 지가변동을 시뮬레이션 분석해 보았다. 그 결과 도로망의 통합도가 공시지가와 가장 연관성이 높고, 통합도가 높을수록 공시지가가 상승하는 것으로 분석되었다. 다음으로 사례지역에 임의로 도로를 개설하고 통합도를 재 산정한 후, 도로개설에 의한 주변의 지가변동을 예측해 보았다. 이와 같이 본 연구에서 도입한 연구방법이나 결과는 주민들의 관심이 높은 지가 변화를 수월하게 예측 할 수 있는 장점이 있다. 또한 도시재생사업이나 도시개발사업 등과 같은 사업을 시행하기 전에 지가 변화를 미리 예측하여 주민들에게 제시함으로써 주민들의 이해와 참여를 확대하는 등 원활한 사업 추진과 관련 정책수립에 기여할 수 있을 것이다.

공간구조를 고려한 도로망 기반 토지이용의 분류분석 (Classification Analysis of Road Network-Based Land Use Considering Spatial Structure)

  • 김혜영;전철민
    • 한국지리정보학회지
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    • 제17권1호
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    • pp.24-34
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    • 2014
  • 도시공간을 이해하고 적절한 계획을 세우기 위해서는 도로와 토지이용을 동시에 고려한 통합적인 분석이 요구되며, 공간의 평면적 구조뿐만 아니라 수직적인 구조도 분석이 요구된다. 따라서 본 연구의 목적은 이러한 공간구조를 고려하여 도로를 기반으로 토지이용을 분석하고 평가하는 것이다. 연구방법은 먼저, 도로는 도로망 구조를 고려한 공간구문론을 도입하였고, 토지이용은 주거와 상업용건물의 수평적이고 수직적인 개발밀도를 고려하였다. 둘째, 물리적 거리, 공간구문론의 속성 중 전체통합도, 도로의 길이를 반영한 전체통합도의 3가지 도로 변수에 대한 설명력을 비교하였다. 셋째, 이 중 적절한 도로 변수를 기반으로 토지이용과 함께 변형한-IPA를 수행하고, 결과를 4개의 영역으로 분류하였다. 이를 계획된 지역인 서울의 강남구에 적용하여 결과를 가시화하였다.

도시공원의 토지피복 및 식재구조에 따른 온도 영향요인 규명 연구 - 성남시 분당구 중앙공원을 사례로 - (A Study of Factors Influencing of Temperature according to the Land Cover and Planting Structure in the City Park - A Case Study of Central Park in Bundang-gu, Seongnam -)

  • 기경석;한봉호;허지연
    • 한국환경생태학회지
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    • 제26권5호
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    • pp.801-811
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    • 2012
  • 본 연구는 도시공원의 토지피복 및 식재구조에 따른 온도 영향요인을 규명하는데 목적이 있다. 성남시 분당구 중앙공원을 대상으로 전 지역에 대한 토지피복 및 식재현황을 파악하였으며 30개의 조사구를 설정하여 정밀 토지피복 및 식재구조를 파악하고 온도는 10회 반복 측정하였다. 온도 영향요인은 토지피복유형, 식재유형, 층위구조, 녹지량(녹피율, 녹지용적계수)을 선정하여 실측 온도와의 통계분석을 실시하였다. 토지피복유형, 식재유형, 층위구조와 실측 온도와의 분산분석 결과, 토지피복유형에서 목본 식재지는 저온역으로 초지와 포장지는 고온역으로 구분되었다. 식재유형은 침엽수 및 활엽수 식재지는 저온역으로, 초지와 포장지는 고온역으로 구분되었다. 층위구조는 교목층과 교목층+하부식재 유형은 저온역으로, 초지와 포장지는 고온역으로 구분되었다. 녹지량과 실측 온도와의 상관관계 분석 결과 녹피율과 녹지용적계수는 모두 실측 온도값과 고도의 음(-)의 상관관계가 인정되었다. 녹지량과 실측 온도와의 회귀모형에 의하면 녹피율은 1% 증가할 때마다 $-0.002^{\circ}C$, 녹지용적계수는 $1m^3/m^2$ 증가할 때마다 $-0.122^{\circ}C$의 온도저감 효과가 있을 것으로 예측되었다.