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The choice of droplet size probability distribution function for oil spill modeling is not trivial 5
Faillettaz, Robin; Paris, Claire B.; Vaz, Ana C.; Perlin, Natalie; Aman, Zachary M.; Schlüter, Michael; Murawski, Steven A..
The droplet size distribution (DSD) formed by gas-saturated oil jets is one of the most important characteristics of the flow to understand and model the fate of uncontrolled deep-sea oil spills. The shape of the DSD, generally modeled as a theoretical lognormal, Rosin-Rammler or non-fundamental distribution function, defines the size and the mass volume range of the droplets. Yet, the fundamental DSD shape has received much less attention than the volume median size (d50) and range of the DSD during ten years of research following the Deepwater Horizon (DWH) blowout. To better understand the importance of the distribution function of the droplet size we compare the oil rising time, surface oil mass, and sedimented and beached masses for different DSDs...
Tipo: Text Palavras-chave: Droplet size distribution; DSD; Oil spill; Oil spill model; Oil model; Deepwater Horizon; Blowout; D50; Probability distribution function.
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00664/77654/79990.pdf
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Scale Effects, Technical Efficiency and Land Lease in China 31
Wang, Xiaobing; Yu, Xiaohua.
Using a panel dataset from Zhejiang province in China over the period 1995-2002, we propose a two-step estimation procedure to investigate the links between land lease activity and production efficiency. We find that the output elasticity with respect to land, the scale effect and the technical efficiency are higher for farmers involved in land-lease activities. In addition, technical efficiency and land-lease activity are endogenous, and farmers with higher technical efficiency are more likely to lease more land and adopt advanced technologies to achieve higher profits, which in turn alters the technical efficiency.
Tipo: Conference Paper or Presentation Palavras-chave: Land Lease; Land Use Rights; Technical Efficiency; Scale Effect; Farm Management; Land Economics/Use; Q15; P23; D50.
Ano: 2011 URL: http://purl.umn.edu/115736
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