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강현수,성찬용,Kang, Hyun-Soo,Sung, Chan-Yong 한국농공학회 2009 한국농공학회논문집 Vol.51 No.1
This study was performed to evaluate the physical and mechanical properties of concrete using waste activated carbon. Materials used were ordinary portlant cement, crushed coarse aggregate, natural fine aggregate, waste activated carbon, and superplasticizer. The substitution ratios of waste activated carbon were 0,1,2,3,4,5,6,7,8,9 and 10%. The unit weight was decreased and water absorption ratio was increased with increasing the waste activated carbon content, respectively. When the substitution ratio of waste activated carbon was 3%, compressive strength, flexural strength and dynamic modulus of elastisity were more higher than that of the ordinary portland cement (OPC), and it was decreased with increasing the waste activated carbon content, respectively. The most effective contents of waste activated carbon was 2% in performance and 4% in practical use Accordingly, waste activated carbon can be used for concrete material.
움직임 추정오차의 예측을 이용한 고속 움직임 추정 방법
강현수,Kang, Hyun-Soo 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.9C
This paper presents an enhanced MSEA(multi-level successive elimination algorithm) which is a fast algorithm of the full-search motion estimation. We predict the SAD at the final level using the values of norms at the preceding levels in MSEA and then decide on whether the processing at the following levels should be proceeded or not. We skip the computation at the following levels where the processing is not meaningful anymore. Consequently, we take computational gain. For the purpose of predicting the values of SAD at each level, we first show the theoretical analysis of the value of norm at each level, which is verified by experiments. Based on the analysis a new motion estimation method is proposed and its performance is evaluated. 본 논문은 고속 전역탐색법 중의 하나인 MSEA(multi level successive elimination algorithm)를 개선한 방식으로서, MSEA의 단계에 따른 norm의 계산 결과를 이용하여 최종 단계의 SAD를 예측함으로써 더 이상의 단계를 수행할 필요가 없다고 판단되는 단계의 계산을 생략함으로써 계산 량을 감소시키는 방법을 제안한다. 각 단계별 SAD의 예측을 위해 norm에 대한 이론적 분석이 이루어지며 실험을 통해 분석내용을 검증하고, 이를 바탕으로 새로운 알고리즘을 제안하고 실험을 통해 제안된 알고리즘의 성능을 평가한다.
강현수(Kang, Hyun-Soo) 한국공간환경학회 2013 공간과 사회 Vol.23 No.1
중앙정부가 주도하는 하향식 지역발전 대신 지방정부와 주민이 주도하는 상향식 지역발전에 대한 관심이 높아지고 있다. 1970년대 낮은 경제 수준에도 불구하고 높은 사회 발전을 이룩하여 전 세계에 새로운 발전 모델을 선보인 바 있는 인도의 케랄라 주(州)는 1990년대 말부터 주 정부가 가졌던 권한을 하위 지방자치단체 및 지역 주민에게 획기적으로 이양하는 급진적 지방분권과 아울러 지역발전을 위한 계획과정에 주민들의 직접 참여를 확대하는 “주민계획(People’s Plan)”을 시행해왔다. 철저하게 상향식 방식으로 진행된 케랄라 주 주민계획을 통하여 주민참여와 주민권능부여가 크게 확대되었다. 이 논문에서는 케랄라 주에서 시행하고 있는 상향식 계획과정인 “주민계획”의 추진 배경과 추진 과정, 그 의의와 시사점에 대해 살펴보고자 한다. The Indian state of Kerala has been successfully carrying out decentralization and empowering people and local communities, especially through the 'People's Plan' since 1990s. People’s plan of Kerala started the devolution of control of decisions and budgets for local development from a centralized bureaucracy to local communities and ordinary people. Through People’s plan, local people could participate in planning process, and determine and implement their development projects by themselves with their own priorities. This paper aims to comprehend overall evolving process of the People’s plan in Kerala from the campaign phase to the institutional phase since 1990s, and to analyse the characteristics and implications of Kerala's unique experiments in the world.
지속가능한 발전을 위한 물-에너지-식량 연계에 대한 실증분석
강현수(Hyun-Soo Kang) 한국무역연구원 2020 무역연구 Vol.16 No.2
Purpose– The purpose of this study was to analyze the Water-Energy-Food(WEF) Nexus of Korea, China, and Japan in order to sustainable development. Design/methodology/approach–This study investigates water security, energy security, and food security of Korea, China, and Japan from 2000 to 2017. Based on augmented production function model and environmental Kuznets hypothesis, this study constructs the simultaneous equation, fixed effect model, sustainable development index, and Granger causality. Findings–First, principal component analysis was conducted to secure the representativeness of food security index and food security, water security index were also representative in deriving the sustainable development index. Second, the U-shaped relationship between economic growth and food security was analyzed in three countries: Korea, China, and Japan through the simultaneous equation of WEF Nexus. Third, in the future, Japan was analyzed to have a relatively larger decrease in the sustainable development index than China and Korea. Fourth, in the case of China, the WEF nexus relationship has a bilateral causal relationship between WEFs, and the bilateral causal relationship between water security and energy security in Korea and food security and water security in Japan. Research implications or Originality–Therefore, we need to strengthen the management of WEF Nexus and cooperate with policies and various stakeholders such as government and private institutions.
강현수 ( Kang Hyun Soo ),성찬용 ( Sung Chan Yong ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-
This study is performed to examine engineering properties of waste active carbon used concrete(WAC). Tests for compressive strength, flexural strngth, pulse velocity of concrete using waste active carbon are performed. As a result, compressive strength, flexural strngth, pulse velocity of concrete using waste active carbon are in the range of 21 ~ 27 MPa and 6.61 ~ 7.34 MPa for curing 7 days and 24 ~ 33 MPa, 6.98 ~ 8.49 MPa, and 4,480 ~ 4,580 m/s for curing 28 days, respectively. Accordingly, waste active carbon is expected that can use a part of cement.