• 제목/요약/키워드: Mixed use

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잔골재의 수급현황 및 활용방안에 관한 기초적 연구 (A Fundamental Study on Supply Status and Use Plan of Fine Aggregates)

  • 유명열;이세현;이현수
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2005년도 봄학술 발표회 논문집(II)
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    • pp.101-104
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    • 2005

  • It analyzed the supply status of fine aggregate and find the point of issue related alternative fine aggregate through researches and interviews. The conclusions of the study are as follows. 1. Ready mixed concrete manufacture used crushed fine aggregate (15.5$\%$) and recycled fine aggregate (1.5$\%$) for alternatives aggregate than 1.3$\%$ in 1991. It is not allowed to use a recycled fine aggregate in ready mixed concrete, but they used it. 2. All alternative aggregate are satisfied the Korean Standard, But they showed low properties of mortar compared to when it replaced with natural fine aggregate. So, it is needed to make another special Korean Standard to use alternative aggregate in normal concrete by mixing method to recover the workability and compressive strength.

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Soil organic carbon variation in relation to land use changes: the case of Birr watershed, upper Blue Nile River Basin, Ethiopia

  • Amanuel, Wondimagegn;Yimer, Fantaw;Karltun, Erik
    • Journal of Ecology and Environment
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    • 제42권3호
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    • pp.128-138
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    • 2018

  • Background: This study investigated the variation of soil organic carbon in four land cover types: natural and mixed forest, cultivated land, Eucalyptus plantation and open bush land. The study was conducted in the Birr watershed of the upper Blue Nile ('Abbay') river basin. Methods: The data was subjected to a two-way of ANOVA analysis using the general linear model (GLM) procedures of SAS. Pairwise comparison method was also used to assess the mean difference of the land uses and depth levels depending on soil properties. Total of 148 soil samples were collected from two depth layers: 0-10 and 10-20 cm. Results: The results showed that overall mean soil organic carbon stock was higher under natural and mixed forest land use compared with other land use types and at all depths ($29.62{\pm}1.95Mg\;C\;ha^{-1}$), which was 36.14, 28.36, and 27.63% more than in cultivated land, open bush land, and Eucalyptus plantation, respectively. This could be due to greater inputs of vegetation and reduced decomposition of organic matter. On the other hand, the lowest soil organic carbon stock under cultivated land could be due to reduced inputs of organic matter and frequent tillage which encouraged oxidation of organic matter. Conclusions: Hence, carbon concentrations and stocks under natural and mixed forest and Eucalyptus plantation were higher than other land use types suggesting that two management strategies for improving soil conditions in the watershed: to maintain and preserve the forest in order to maintain carbon storage in the future and to recover abandoned crop land and degraded lands by establishing tree plantations to avoid overharvesting in natural forests.

  • https://doi.org/10.1186/s41610-018-0076-1 인용 PDF KSCI

대전시 상업지역 주거복합건축물 사례 분석을 통한 관리방안 연구 (A Study on Management Plans through Case Analysis of Residential Complexes in Commercial Areas in Daejeon)

  • 류경수
    • 지역연구
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    • 제39권2호
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    • pp.63-76
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    • 2023

  • 최근 대도시 상업지역 내 주거복합건축물의 입지로 인해 도시기능이 상업기능에서 주거기능으로 전환되고 있다. 대전광역시 상업지역 내 용도용적제를 개선하기 위해 특·광역시의 제도를 비교분석하고, 사업대상지 8개소를 분석하여 문제점을 도출하였다. 첫째, 주거복합건축물의 용도 분류의 명확화, 둘째, 상업지역의 기능 상실에 대한 도시 계획적 불균형, 셋째, 개발밀도의 차이로 도시환경의 훼손이다. 이에 개선방안으로는 첫째, 주거기능과 용도복합의 비율을 최소 10% 이상 확보하고, 둘째, 다양한 용도와 기능을 융·복합화된 시설을 유도하여 도시경쟁력을 확보하고, 용도용적제 폐지를 통한 공동주택의 일괄적인 용적률을 적용하며, 셋째, 지구단위계획 수립 및 자문을 통한 개발밀도를 제시하였다.

  • https://doi.org/10.22669/krsa.2023.39.2.063 인용 PDF

주택지의 기능변화에 따른 가로환경 개선 방안 - 대구시의 1970년대 토지구획정리사업지구를 중심으로 - (Street Environment Improvement Plan Resulting from the Functional Transition of Residential Area - Focused on the land reallocation project in the 1970's of the Metropolitan City of Daegu -)

  • 김한수
    • 한국주거학회논문집
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    • 제25권6호
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    • pp.19-26
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    • 2014

  • This study aims to derive street design alternative which can be applied to residential area as the functions of land use have been changed. The main findings are as follows; First, the study area in this research is on the process of the functional transition from full residential use to residential-commercial mixed use with cafes and restaurants. Second, dead-end streets in residential areas needs to be widened in order to meet the increasing needs of pedestrians and cars. One of the suggested strategies is to remove fences on the dead-end streets. Third, based on the main findings, this research can suggest following policies. Citizen participation is necessary in building land use plans and space design in old residential areas. Citizens can participate in architectural and landscape contracts, district-unit plan with the help of experts such as urban planners and architects.

  • https://doi.org/10.6107/JKHA.2014.25.6.019 인용 PDF KSCI