http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
기후 변화 위험 인식은 실제 대응 행동으로 이어지는가?: 정책 지식의 매개효과를 중심으로
박이레 ( Ie Rei Park ),( Chengyu Song ),유나리 ( Nari Yoo ) 성균관대학교 국정전문대학원 2021 국정관리연구 Vol.16 No.1
기후변화로 인한 위험이 커지면서 전 세계적으로 이에 대응하려는 국가적 차원의 대응 행동이 활발해지고 있고, 개인의 기후변화 위험에 대한 인식도 높은 수준에 이르렀다. 하지만 개인적 차원의 대응 태도와 실천은 이러한 경향을 따라가지 못하고 있다. 이에 이 연구는 기후변화 위험인식과 대응 행동 간 관계, 그리고 이 관계를 매개하는 정책 지식의 효과를 분석하는 것을 목적으로 한다. 실증분석을 위하여 연세대학교 미래정부연구센터 ‘2020 글로벌 시대의 환경 및 기후 변화 대응 인식조사’ 결과자료를 활용하였으며, 매개효과를 확인하기 위하여 3단계 다중회귀분석을 실시하였다. 분석결과, 지각된 위험은 대응 행동에 직접적인 영향을 미칠 뿐만 아니라 정책 지식의 수준을 높임으로써 간접적인 영향도 미친다는 점이 확인되었다. 이 연구는 정책 지식이라는 매개변수를 통해 지각된 위험과 대응 행동 간 관계를 구체적으로 설명하고, 정책 효과를 극대화하기 위한 정책 지식의 중요성을 다시 강조하였다는 데 이론적, 정책적 시사점을 가진다. The purpose of this study is to examine the relationship between climate change risk perception and response actions, and also test the mediating effect of policy knowledge. As the risks from climate change increases, national response to climate change is becoming more active around the world, and individuals’ awareness of climate change risks has reached a high level. Yet the individuals’ attitude and actions response in climate change are still needed to be enhanced. Based on this reality, research questions were raised. Based on this, research questions raised in this study well help to explore the factors that affect the individuals’ response to climate change. For this reason, the research conducts a three-step regression analysis using data from the Institute for Future Government survey results. The findings indicate that the level of individual knowledge of policies increases as their perception of the risk increases, which in turn has a positive impact on enhancing the individuals’ response behavior. This study contributes theoretically and practically in that it describes the relationship between perceived risk and corresponding behavior through the mediator of policy knowledge and re-emphasizes the importance of policy knowledge to maximize policy effectiveness.
Cheng Yu,Lin Wang,Chuanjun Han,Jiaqiang Jing,Yuxing Li,Wuchang Wang,Mingjun Du,Xincan Song,Longyao Zhang 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.7
The hydrate particle aggregation is crucial for the flow safety of oil and gas pipelines. In this paper, coupled with the Eulerian-Eulerian model, k-ε turbulence model and the population balance model considering the hydrate aggregation and breakage, the hydrate aggregation process is studied in the bend, and the change of the average particle size under different hydrate volume fractions is discussed. The results show that the hydrate aggregation process includes two stages in the bend, namely the rapid growth and the dynamic equilibrium. In the rapid growth stage, both the hydrate concentration and particle size in the elbow increase rapidly, and the high concentration and large particle size regions on the inside of the elbow also increase significantly. Furthermore, two types of aggregates are formed on the inside of the elbow. One is a small amount of large-particle aggregates, while the other is the relatively high concentration of medium-size aggregates. Besides, the uniform suspension with a smaller concentration and particle size is distributed on the outside of the elbow, but there are also large-size particles that aggregate and adhere near the wall of pipe. As the hydrate volume fraction increases, the hydrate average particle size increases. High concentration hydrate reaches dynamic equilibrium faster during the flow process.
Cheng Yu,Chuanjun Han,Lin Wang,Jiaqiang Jing,Yuxing Li,Wuchang Wang,Mingjun Du,Xincan Song 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.10
Both micron-sized sand particles flowing into the pipe and the secondary formation of natural gas hydrate will pose a great threat to the flow assurance of the pipeline for hydrate exploitation. Therefore, based on the population balance model considering the aggregation and breakage of hydrate and micron-sized sand particles, the flow characteristics coupling hydrate and micron-sized sand are studied, and the effects of flow velocity are discussed. The results show that the slurry viscosity increases significantly at the lower part of the horizontal pipe where the solid particles tend to aggregate. After the slurry enters the elbow pipe, the viscosity, hydrate concentration, and particle size gradually decrease, while the sand concentration first increases and then decreases. Solid particles with relatively high concentration and large particle size appear on the outside of the first half of the elbow. In the vertical pipe, the hydrate concentration and particle size gradually increase again, and the hydrate with high concentration and large particle size appears on the inside. Besides, the coupling aggregation of hydrate and sand particles is concentrated near the wall of the bottom of the horizontal pipe, near the wall of the outside of the elbow pipe and the inside of the second half of the elbow, and near the wall of the vertical pipe. The high flow velocity has a great ability to carry the hydrate with high concentration and large size.