• Title/Summary/Keyword: Comparative Research

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A Comparative Analysis of Stormwater Runoff with Regard to Urban Green Infrastructure - A Case Study for Bundang Newtown, SungNam - (도시 녹지기반 특성에 따른 강우 유출수 비교 분석 - 성남시 분당신도시를 사례로 -)

  • Park, Eun-Jin;Kang, Kyu-Yi;Lee, Hyun-Jung
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.11 no.6
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    • pp.1-10
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    • 2008
  • The study was aimed at analyzing the relationship between the characteristics of urban green infrastructure and stormwater runoff in a small urban watershed composed of 22 drainage basins. The green areas of which soils are not sealed and allow water infiltrate, were examined for different types of green spaces. In a comparative study for drainage basins of which green spaces are 15.5% and 34.4%, respectively, runoffs were not different with the size of green space. It was attributed to that the increase of runoff by greater road area offset the advantage of greater green area. Another comparative measurement of runoff for drainage basins with similar green area size showed that runoff decreased with greater permeable area (school ground area) and smaller road area. The runoff measurements could address that runoff rates are affected not only by green area size but also by the type of green area and other land covers related to permeability and flow into drainage. It implicated that the improvement of urban green infrastructure as a functional unit for water infiltration and interception is important for stormwater runoff management.

Comparative Evaluation of Cool Surface Ratio in University Campus: A Case Study of KNU and UC Davis (대학 캠퍼스의 쿨표면 비율 비교평가: 경북대학교와 UC Davis를 사례로)

  • Hwang, Young-Seok;Um, Jung-Sup
    • KIEAE Journal
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    • v.15 no.1
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    • pp.117-127
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    • 2015
  • The cool surface ratio could be used as a proxy of the overall thermal environment contributing to heat islands in urban area. This research proposes a comparative evaluation framework in an objective and quantitative way for measuring cool surface ratios. Two university campuses (Kyungpook National University: KNU, South Korea and UC Davis: University of California, Davis, USA) were selected as case study sites in order to monitor cool surface condition. Google Earth combined with digital maps realistically identified the major type of cool surfaces such as cool roofs and water bodies in the study area. Cool surfaces were sparsely identified over the KNU campus while the UC Davis campus was heavily covered by cool surfaces such as cool roofs and water bodies, resulting in almost four times more first-grade cool surfaces, as compared to KNU. It is confirmed that standard remote sensing technology can offer the viable method of measuring and comparing the campus-wide cool surface condition. It is anticipated that this research output could be used as a valuable reference to initiate a nation-wide cool surface strategy since objective evidence has been provided based on area-wide measurement for the cool surface in the two university context.

The Legal Protestation for Interior Design and Protection Status of Interior Design - A Comparative Study : Design Protection and Trademarks for Interior Design between ROK and U.S.A. - (실내디자인 보호체계 및 현황에 관한 연구 - 미국과 한국의 디자인 및 상표등록 사례비교를 중심으로 -)

  • Ryu, Hojeong;Ha, Mikyoung
    • Korean Institute of Interior Design Journal
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    • v.23 no.3
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    • pp.134-143
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    • 2014
  • The protection of Design is very important issues in these days. Even though Interior Design is also one of important design sections, it is relatively unprotected by formal intellectual property laws, yet creativity and innovation flourish. The needs for protection of Interior Design have been creased. The aim of this study is to suggest the weakness of the system for protection of Interior Design. The proposed research is comprised of two themes. One is to research Acts related to protection of Interior Design. The second is to study the registered cases under the Design Protection Acts. These two theme is generated by the comparative review between ROK and U.S.A. Through these comparative results, this study propose some considerations for an effective protection for Interior Design. Design need to be registered in the hole image of the space not a partial element. The concept needs to be protected because it is more effective way to respond the copying. Exterior for facade and Interior Design need to be registered in one registration to use the protection system actively.

Structural health monitoring through meta-heuristics - comparative performance study

  • Pholdee, Nantiwat;Bureerat, Sujin
    • Advances in Computational Design
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    • v.1 no.4
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    • pp.315-327
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    • 2016
  • Damage detection and localisation in structures is essential since it can be a means for preventive maintenance of those structures under service conditions. The use of structural modal data for detecting the damage is one of the most efficient methods. This paper presents comparative performance of various state-of-the-art meta-heuristics for use in structural damage detection based on changes in modal data. The metaheuristics include differential evolution (DE), artificial bee colony algorithm (ABC), real-code ant colony optimisation (ACOR), charged system search (ChSS), league championship algorithm (LCA), simulated annealing (SA), particle swarm optimisation (PSO), evolution strategies (ES), teaching-learning-based optimisation (TLBO), adaptive differential evolution (JADE), evolution strategy with covariance matrix adaptation (CMAES), success-history based adaptive differential evolution (SHADE) and SHADE with linear population size reduction (L-SHADE). Three truss structures are used to pose several test problems for structural damage detection. The meta-heuristics are then used to solve the test problems treated as optimisation problems. Comparative performance is carried out where the statistically best algorithms are identified.

Comparative LCA(life cycle assessment) between two different model of Electric Motor Unit(EMU) (서로다른모델의 전동차에 대한 비교 전과정평가)

  • Kim, Jin-Yong;Choi, Yo-Han;Kim, Young-Ki;Lee, Kun-Mo
    • Proceedings of the KSR Conference
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    • 2007.11a
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    • pp.6-14
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    • 2007
  • The objective of this research is to comparative LCA(life cycle assessment) between two different model of Electric Motor Unit(EMU).the environmental impact of Aluminum body Electric Motor Unit(EMU) and Stainless Steel(STS) body Electric Motor Unit(EMU). LCA process consists of four steps which are goal, scope definition, life cycle impact analysis(LCIA) and life cycle interpretation. ISO 14044 provides the LCA standard method which can be conducted by using comparative LCA. From the research it is foung that the Aluminium Body Electric Motor Unit (EMU) is 3.6ton heaver than Stainless Steel(STS) body Electric Motor Unit(EMU). The system boundary of both Electric Motor Unit (EMU) are same life span and travel same distance. These both Electric Motor Unit (EMU) has same kind of environmental impact which is maximum Ozone Depletion(OD). During using period of these two models, the Aluminium Body Electric Motor Unit(EMU) has more global warming(GW) effect but Stainless Steel(STS) body Electric Motor Unit(EMU) has more Ozone Depletion(OD) effect. The above result is obtained by using LCA software PASS verson 3.1.3.

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Comparative Evaluation between Cool Roof and Green Roof in terms of Installation Cost: a Case Study of KNU Campus (설비 투자비용의 관점에서 쿨루프와 옥상녹화의 비교 평가: 경북대학교 캠퍼스 사례를 중심으로)

  • Kim, Jun-Woo;Um, Jung-Sup
    • Journal of Environmental Impact Assessment
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    • v.21 no.6
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    • pp.927-939
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    • 2012
  • Cool roofs are currently being emerged as one of important mechanism to save energy in relation to the building. Although green roof has already gained nation-wide recognition as a typical method of energy saving in the roof, this approach did not provide a realistic evidence that is economically feasible in terms of installation cost. This research is primarily intended to compare installation cost between the two techniques. This research proposes a comparative evaluation framework in a more objective and quantitative way for an installation cost between the two techniques. Kyungpook National University (KNU) was selected as a survey objective and an exhaustive and realistic comparison of installation cost between the two techniques was conducted, based on Life Cycle Cost analysis (initial investment cost, maintenance cost, dismantling and waste disposal expense). It was possible to identify that installation cost of cool roofs is 4.7 times cheaper than that of green roof. Also present value based on probabilistic approach was identified as 0.25 (4.95) higher than the installation cost on the assumption of constant price and interest. It is expected that much more installation cost for the large scale green roof will be required since small-size green roof selected as a survey objective in this study could be operated under less initial installation and maintenance condition.

A Comparative Study on Electronic Cultural Atlas (전자문화지도에 대한 비교 연구)

  • Moon, Sang-Ho
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.18 no.9
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    • pp.2161-2168
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    • 2014
  • According to the growing interest in the digital convergence throughout society, the convergence of creative and new forms is emerging recently in various fields. Research methods to explore the diversity of academic studies have been studied in the field of study. As one of these methods, research on electronic cultural atlas that has features of convergence studies is gradually spreading. In this paper, we examine existing electronic cultural atlas and then, compare and analyze them. In details, existing electronic cultural atlas are comparative analyzed on the basis of base map, interface, and function. Through the results of comparative analysis, the efficient production of electronic cultural atlas are examined.