180 research outputs found
発電炉の経済性向上を目指した球状トカマク核融合炉の先進設計
学位の種別: 課程博士審査委員会委員 : (主査)東京大学教授 小野 靖, 東京大学教授 大崎 博之, 東京大学教授 根本 孝七, 東京大学教授 井 通暁, 東京大学教授 小野 亮University of Tokyo(東京大学
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Taking stock of national climate policies to evaluate implementation of the Paris Agreement
Many countries have implemented national climate policies to accomplish pledged Nationally Determined Contributions and to contribute to the temperature objectives of the Paris Agreement on climate change. In 2023, the global stocktake will assess the combined effort of countries. Here, based on a public policy database and a multi-model scenario analysis, we show that implementation of current policies leaves a median emission gap of 22.4 to 28.2 GtCO2eq by 2030 with the optimal pathways to implement the well below 2 °C and 1.5 °C Paris goals. If Nationally Determined Contributions would be fully implemented, this gap would be reduced by a third. Interestingly, the countries evaluated were found to not achieve their pledged contributions with implemented policies (implementation gap), or to have an ambition gap with optimal pathways towards well below 2 °C. This shows that all countries would need to accelerate the implementation of policies for renewable technologies, while efficiency improvements are especially important in emerging countries and fossil-fuel-dependent countries
Taking stock of national climate policies to evaluate implementation of the Paris Agreement
Many countries have implemented national climate policies to accomplish pledged Nationally Determined Contributions and to contribute to the temperature objectives of the Paris Agreement on climate change. In 2023, the global stocktake will assess the combined effort of countries. Here, based on a public policy database and a multi-model scenario analysis, we show that implementation of current policies leaves a median emission gap of 22.4 to 28.2 GtCO2eq by 2030 with the optimal pathways to implement the well below 2 °C and 1.5 °C Paris goals. If Nationally Determined Contributions would be fully implemented, this gap would be reduced by a third. Interestingly, the countries evaluated were found to not achieve their pledged contributions with implemented policies (implementation gap), or to have an ambition gap with optimal pathways towards well below 2 °C. This shows that all countries would need to accelerate the implementation of policies for renewable technologies, while efficiency improvements are especially important in emerging countries and fossil-fuel-dependent countries
Uma revisão sobre polimerização de olefinas usando catalisadores Ziegler-Natta heterogêneos
RATES OF DIFFERENT DEUTEROETHYLENE AND DEUTEROETHANE FORMATION DURING CONTACT DEUTERATION OF LIGHT ETHYLENE IN THE PRESENCE OF NICKEL CATALYST:Explanation to TURKEVICH, SCHISSLER and IRSA's Experiment and Theoretical Predictions
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