• 환경정책연구
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• 제14권3호
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• pp.95-118
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• 2015

2015년 프랑스 파리에서 열릴 UNFCCC 제21차 당사국총회에서는 신기후체제를 위한 합의문인 2015 합의 채택을 목표로 하고 있다. 이러한 상황에서 신기후체제의 설계 특징을 살펴보고 신기후체제 협상에서 가장 중요한 쟁점사항 중 하나인 차별화의 기술적인 적용방법에 대해 논의하였다. 연구 결과 자국이 스스로 정하는 기여(INDC)의 순환적 구조와 감축기여진전 규정을 통해 당사국 스스로 감축상향을 자동적으로 이룰 수 있는 구조로 신기후체제가 설계되어 있는 것이 특징이다. 또한, 이원화된 차별화 적용 방안은 신기후체제에서는 우리나라가 감축과 이행수단 지원 의무국으로 편입될 가능성이 높기 때문에 지양하는 것이 바람직하며 새로운 차별화 적용 방안을 지지하는 것이 필요하다고 판단된다. 차별화의 적용은 INDC와 기본개념을 같이 하는 자체적 차별화가 우리나라의 국익에 부합하며 자체적 차별화를 추진하기 위해서는 이와 관련된 기본 규칙 마련이 필요하고, 기본 규칙은 감축상향을 유도할 수 있도록 설계되어야 한다.

• Steel and Composite Structures
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• 제34권2호
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• pp.279-288
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• 2020

The computational post-buckling strength of the tilted sandwich composite shell structure is evaluated in this article. The computational responses are obtained using a mathematical model derived using the higher-order type of polynomial kinematic in association with the through-thickness stretching effect. Also, the sandwich deformation behaviour of the flexible soft-core sandwich structural model is expressed mathematically with the help of a generic nonlinear strain theory i.e. Green-Lagrange type strain-displacement relations. Subsequently, the model includes all of the nonlinear strain terms to account the actual deformation and discretized via displacement type of finite element. Further, the computer code is prepared (MATLAB environment) using the derived higher-order formulation in association with the direct iterative technique for the computation of temperature carrying capacity of the soft-core sandwich within the post-buckled regime. Further, the nonlinear finite element model has been tested to show its accuracy by solving a few numerical experimentations as same as the published example including the consistency behaviour. Lastly, the derived model is utilized to find the temperature load-carrying capacity under the influences of variable factors affecting the soft-core type sandwich structural design in the small (finite) strain and large deformation regime including the effect of tilt angle.

• Acta Via Serica
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• 제5권1호
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• pp.23-56
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• 2020

The study of Putin's Russia should be placed in a broad historiographical context, prevailing in the West. While in the beginning of the post-Soviet era, most observers believed that Russia would reach a Fukuyamian "end of history," the situation is quite different now. At present, Western observers see Putin's Russia as the manifestation of authoritarianism. While this assumption is undoubtedly true, it does not provide much insight into the regime's operational model. Here, a comparison with Renaissance and early modern Europe might provide a clue to the operational model of the regime. Similar to early modern European rulers, Putin limits the use of direct and wide use of force, preferring manipulation, corruption, and the targeted killing of his most important enemies. In foreign policy, Putin has tried to avoid wholesale conflicts and broadly uses mercenaries, whose relationships with the Kremlin are downplayed. The similarities between Putin's regime and early modern European regimes do not mean that their destinies will be the same. In Europe, the Renaissance led to centralized states, whereas in Russia, the "Renaissance" could well lead to the country's disintegration.

• Steel and Composite Structures
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• 제35권4호
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• pp.567-578
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• 2020

Based on third-order shear deformation shell theory, the present paper investigates post-buckling properties of eccentrically stiffened metal foam curved shells/panels having initial geometric imperfectness. Metal foam is considered as porous material with uniform and non-uniform models. The single-curve porous shell is subjected to in-plane compressive loads leading to post-critical stability in nonlinear regime. Via an analytical trend and employing Airy stress function, the nonlinear governing equations have been solved for calculating the post-buckling loads of stiffened geometrically imperfect metal foam curved shell. New findings display the emphasis of porosity distributions, geometrical imperfectness, foundation factors, stiffeners and geometrical parameters on post-buckling properties of porous curved shells/panels.

• Structural Engineering and Mechanics
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• 제75권6호
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• pp.701-711
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• 2020

This papers studies nonlinear stability and post-buckling behaviors of geometrically imperfect metal foam doubly-curved shells with eccentrically stiffeners resting on elastic foundation. Metal foam is considered as porous material with uniform and non-uniform models. The doubly-curved porous shell is subjected to in-plane compressive loads as well as a transverse pressure leading to post-critical stability in nonlinear regime. The nonlinear governing equations are analytically solved with the help of Airy stress function to obtain the post-buckling load-deflection curves of the geometrically imperfect metal foam doubly-curved shell. Obtained results indicate the significance of porosity distribution, geometrical imperfection, foundation factors, stiffeners and geometrical parameters on post-buckling characteristics of porous doubly-curved shells.

• 환경정책연구
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• 제14권4호
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• pp.3-21
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• 2015

Post-2020 합의를 위해 주요 이슈로 부상하는 MRV(Measurement, Reporting, Verification)에 대한 국제적 상황을 분석하고, 선제적 효과적으로 대응할 수 있는 우리나라 전략을 수립 제시하는 것이 필요한 시점이다. 이에, MRV 체계 대안으로서 1) 이원화(Dual) MRV, 2) 통합(Unified) MRV를 분석 검토하였다. 분석 결과, 국가별 상황 및 능력에 따라 차별화하여 유연성을 부여하는 통합 MRV 체계가 가장 합리적이고, 실현 가능한 대안으로 판단되었다. 통합 MRV 체계 수립을 위해서 첫째, 우리 정부 내부적으로 통합 MRV 체계에 대한 합의, 둘째, 통합 MRV의 수립형태 및 적용 방안에 대해 예측 가능토록 방법과 내용의 구체화, 셋째, 개도국이 납득할 수 있도록 MRV 수준의 다양성 보장 방안에 대한 청사진(유연성에 대한 구체적 계획) 제시, 넷째, 개도국의 MRV 수준 제고를 위해 역량 배양을 위한 구체적 지원 방안 제시, 다섯째, 통합 MRV 도입을 위한 로드맵 개발 제시가 필요하다. 이를 추진하는 과정에서 우리나라는 선진국과 개도국 간 합리적 조정자로서 신기후체제가 합의에 도달하는 데 주도적 역할을 담당해야 한다.

• Advances in nano research
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• 제9권1호
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• pp.33-45
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• 2020

Geometrically nonlinear buckling of functionally graded magneto-electro-elastic (FG-MEE) nanoshells with the use of classical shell theory and nonlocal strain gradient theory (NSGT) has been analyzed in present research. Mathematical formulation based on NSGT gives two scale coefficients for simultaneous description of structural stiffness reduction and increment. Functional gradation of material properties is described based on power-law formulation. The nanoshell is under a multi-physical field related to applied voltage, magnetic potential, and mechanical load. Exerting a strong electric voltage, magnetic potential or mechanical load may lead to buckling of nanoshell. Taking into account geometric nonlinearity effects after buckling, the behavior of nanoshell in post-buckling regime can be analyzed. Nonlinear governing equations are reduced to ordinary equations utilizing Galerkin's approach and post-buckling curves are obtained based on an analytical procedure. It will be shown that post-buckling curves are dependent on nonlocal/strain gradient parameters, electric voltage magnitude and sign, magnetic potential magnitude and sign and material gradation exponent.

• 환경정책연구
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• 제9권3호
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• pp.115-142
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• 2010

최근까지 선진국 및 주요 개도국이 발표한 2020년까지의 자발적 온실가스 감축목표를 Global CGE모형을 활용하여 분석한 결과, 선진국의 온실가스 배출량이 2020년까지 1990년 대비 약 14.0% 감축하는 데 그칠 것으로 분석되었다. 따라서 기후변화 문제 해결을 위한 선진국의 선도적 역할과 역사적 책임이라는 측면에서 그리고 Post-Kyoto 협상의 타결을 위해 선진국의 자발적 감축목표의 상향조정의 필요성이 대두되었다. 한편 개도국의 자발적 감축목표 이행은 전 세계 온실가스 배출량을 BaU 대비 약 15.9%까지 감축하는 데 기여할 것으로 분석되었으며, 이는 중국과 인도의 참여가 크게 작용하였다. 이와 같은 결과는 향후 Post-Kyoto 체제의 환경적 효과성을 높이기 위해 선진국의 감축목표 강화와 더불어 개도국의 광범위한 참여와 의미 있는 수준에서의 온실가스 감축행동도 동시에 필요함을 시사한다. 한편 선진국과 주요 개도국의 자발적 온실가스 감축목표의 이행은 전 세계 실질 국내총생산을 1.18% 감소시킬 것으로 분석되었다.

• 한국기후변화학회지
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• 제9권2호
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• pp.181-195
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• 2018

On December 12, 2015, the Conference of the Parties to the United Nations Framework Convention on Climate Change (UNFCCC) adopted the Paris Agreement, in which several developed and developing countries all committed to participating in the reduction of greenhouse-gas (GHG) emissions. South Korea has submitted an intended nationally determined contribution (INDC) proposal with a target to cut down 37% greenhouse gas business as usual (BAU) until 2030 in preparation for the 2030 GHG BAU. Under the post-2020 regime, which will be launched from 2021 as the agreement entered into force early, it is expected that efforts to support GHG reduction and adaptation to climate change in developing countries will be accelerated with the utilization of technologies and financial resources of developed countries. South Korea has established the Basic Plan for Climate Change Response and the Basic National Roadmap for Greenhouse Gas Reductions by 2030 to promote the response to climate change at the government level. The Ministry of Science and ICT, as the National Designated Entity designated by the UNFCCC, has come up with middle and long-term strategies for climate technology cooperation. South-Korea has an abundance of energy-consuming industries to support its export-oriented industrial structure; it is thus expected that achieving the GHG reduction target will incur a considerable cost. Moreover, in order to meet the reduction target (11.3%) of the intended nationally determined contribution proposed by South Korea, it is necessary for South Korea to actively promote projects that can achieve GHG reduction achievements, and financial resources are needed as leverage to reduce risks that can occur in the early stages of projects and attract private sector investment. This paper summarizes the theoretical discussions on climate finance and conducted a comparative analysis on the status of the funds related to climate change response in the UK, Germany, Japan and Denmark. Through this, we proposed the legal and policy tasks that should be carried forward to raise public funds that can be used for creation of new industries related to climate change as well as to reduce GHG emissions in South Korea. The Climate Change Countermeasures Act, which has been proposed by the National Assembly of South-Korea, stipulates the establishment of funds but there is no additional funding except for general account. In this regard, it is also possible to take measures such as the introduction of carbon tax or the collection and use of royalties through technology research and development projects for climate change, such as Industrial Technology Innovation Promotion Act. In addition, since funds are used in various fields such as domestic greenhouse gas reduction, technology development, and overseas projects, it is necessary to establish a system in which various ministries cooperate with the operation of the fund.

• Agribusiness and Information Management
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• 제12권1호
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• pp.36-49
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• 2020

This study pertains to direction of exports direction of major agricultural commodities viz., rice, maize, bengal gram, chillies and cotton from India. In the ensuing next decade during 21st century, India is likely to witness changes in the export pattern of these commodities due to both internal and external constraints. One of the major internal constraints is mounting cost of production. Similarly, one of the most important external constraints include excessive subsidization by importing countries that makes Indian commodities less competitive in the international market. So, the important research question is to analyse the direction of exports of major agricultural commodities from India during post-WTO regime. The dynamic nature of trade pattern of the selected commodities was analyzed by employing the first order Markov process by examining gains and losses in respect of export shares of major Indian agricultural commodities to different countries. During the post-WTO regime, it was found that Saudi Arabia for rice, Bangladesh for maize, Pakistan for bengal gram, Malaysia for (dry) chillies, China, mainland for cotton are the loyal destinations for the commodities. The increasing demand for the selected commodities in countries like Saudi Arabia, Côte d'Ivoire for rice; Malaysia for maize; Pakistan and Algeria for Bengal gram; USA and Sri Lanka for (dry) chillies and Vietnam, Pakistan and Indonesia for cotton need to be explored for augmenting the exports. In order to achieve this goal, it is essential that consumer preferences in newer markets, market intelligence and impediments for augmenting exports need to be researched. It is also high time to analyze the export competitiveness of selected commodities across these importing countries.