Roles of Semivolatile/Intermediate‐Volatility Organic Compounds on SOA Formation Over China During a Pollution Episode: Sensitivity Analysis and Implications for Future Studies

2021 ◽  
Vol 126 (8) ◽  
Author(s):  
Liqing Wu ◽  
Zhenhao Ling ◽  
Min Shao ◽  
Huan Liu ◽  
Sihua Lu ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Organic Compounds ◽  
Future Studies ◽  
Pollution Episode

scholarly journals From siphonophores to deep scattering layers: uncertainty ranges for the estimation of global mesopelagic fish biomass

2018 ◽  
Vol 76 (3) ◽  
pp. 718-733 ◽  
Author(s):  
Roland Proud ◽  
Nils Olav Handegard ◽  
Rudy J Kloser ◽  
Martin J Cox ◽  
Andrew S Brierley
Keyword(s):  
Sensitivity Analysis ◽  
Aspect Ratio ◽  
Food Source ◽  
Acoustic Backscatter ◽  
Mesopelagic Fish ◽  
Fish Biomass ◽  
Future Studies ◽  
Oceanic Carbon ◽  
Potential Food

Abstract The mesopelagic community is important for downward oceanic carbon transportation and is a potential food source for humans. Estimates of global mesopelagic fish biomass vary substantially (between 1 and 20 Gt). Here, we develop a global mesopelagic fish biomass model using daytime 38 kHz acoustic backscatter from deep scattering layers. Model backscatter arises predominantly from fish and siphonophores but the relative proportions of siphonophores and fish, and several of the parameters in the model, are uncertain. We use simulations to estimate biomass and the variance of biomass determined across three different scenarios; S1, where all fish have gas-filled swimbladders, and S2 and S3, where a proportion of fish do not. Our estimates of biomass ranged from 1.8 to 16 Gt (25–75% quartile ranges), and median values of S1 to S3 were 3.8, 4.6, and 8.3 Gt, respectively. A sensitivity analysis shows that for any given quantity of fish backscatter, the fish swimbladder volume, its size distribution and its aspect ratio are the parameters that cause most variation (i.e. lead to greatest uncertainty) in the biomass estimate. Determination of these parameters should be prioritized in future studies, as should determining the proportion of backscatter due to siphonophores.

scholarly journals Guidelines for Tuning the Excited State Hückel-Baird Hybrid Aromatic Character of Pro-Aromatic Quinoidal Compounds

2020 ◽  
Author(s):  
Sílvia Escayola ◽  
Claire Tonnelé ◽  
Eduard Matito ◽  
Albert Poater ◽  
Henrik Ottosson ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Organic Compounds ◽  
Intramolecular Charge Transfer ◽  
Triplet Excited State ◽  
Computational Tools ◽  
Future Studies ◽  
Aromatic Character ◽  
Wide Range ◽  
New Energy

<p>The present study aims to provide a solid ground for the identification, characterization and controlled design of pro-aromatic quinoidal organic compounds holding conjugated rings with Hückel and/or Baird (singlet and triplet) excited state aromatic character, and expects to become a reference work for future studies on Baird-aromaticity. Concretely, we explore a wide range of compounds with a central conjugated ring of different sizes and symmetric exocyclic substitutions. We employ a combination of different computational tools and we also introduce a new energy-based approach for the quantification of the Baird-aromatic character. </p> <p> </p> The key findings of this study indicate that Baird aromaticity is achieved in pro-aromatic quinoidal compounds having small anionic rings or in electron deficient rings with the proper exocyclic substitution. Low-lying states of these systems show very strong hole/electron overlaps, implying that their aromaticity cannot be related to intramolecular charge transfer.

scholarly journals Emulation and Sensitivity Analysis of the Community Multiscale Air Quality Model for a UK Ozone Pollution Episode

2017 ◽  
Vol 51 (11) ◽  
pp. 6229-6236 ◽  
Author(s):  
Andrew V. Beddows ◽  
Nutthida Kitwiroon ◽  
Martin L. Williams ◽  
Sean D. Beevers
Keyword(s):  
Sensitivity Analysis ◽  
Air Quality ◽  
Ozone Pollution ◽  
Air Quality Model ◽  
Quality Model ◽  
Pollution Episode

scholarly journals Guidelines for Tuning the Excited State Hückel-Baird Hybrid Aromatic Character of Pro-Aromatic Quinoidal Compounds

2020 ◽  
Author(s):  
Sílvia Escayola ◽  
Claire Tonnelé ◽  
Eduard Matito ◽  
Albert Poater ◽  
Henrik Ottosson ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Organic Compounds ◽  
Intramolecular Charge Transfer ◽  
Triplet Excited State ◽  
Computational Tools ◽  
Future Studies ◽  
Aromatic Character ◽  
Wide Range ◽  
New Energy

<p>The present study aims to provide a solid ground for the identification, characterization and controlled design of pro-aromatic quinoidal organic compounds holding conjugated rings with Hückel and/or Baird (singlet and triplet) excited state aromatic character, and expects to become a reference work for future studies on Baird-aromaticity. Concretely, we explore a wide range of compounds with a central conjugated ring of different sizes and symmetric exocyclic substitutions. We employ a combination of different computational tools and we also introduce a new energy-based approach for the quantification of the Baird-aromatic character. </p> <p> </p> The key findings of this study indicate that Baird aromaticity is achieved in pro-aromatic quinoidal compounds having small anionic rings or in electron deficient rings with the proper exocyclic substitution. Low-lying states of these systems show very strong hole/electron overlaps, implying that their aromaticity cannot be related to intramolecular charge transfer.

scholarly journals RESEARCH GAPS IN MULTI-CRITERIA DECSION MAKING METHODS FOR RESEARCHERS AS AN AREAS OF INTEREST

2020 ◽  
Vol 4 (2) ◽  
pp. 1-6
Author(s):  
Omar Ibrahim Ayasrah ◽  
Faiz Mohd Turan
Keyword(s):  
Decision Making ◽  
Sensitivity Analysis ◽  
Mobile Technologies ◽  
Decision Making Process ◽  
Multi Criteria Decision Making ◽  
Research Gaps ◽  
Future Studies ◽  
New Methods ◽  
Areas Of Interest ◽  
The Web

The increase in Multi criteria decision-making studies is reflecting its importance as an interested area for research. Even though a high number of revealed studies mainly in last decade, still this field have challenges that require attentions from researchers in future. Most of MCDM related studies did not consider determining DM weights or using subjective methods, and there is an absence of implementing sensitivity analysis to DM weights as well. In addition to the need to develop new methods that utilizing the web or mobile technologies to deal with complexity and uncertainty adhered to MCDM problems. This paper represents a trial to list current challenges in this field as areas of interest for researchers in future studies that aims to enhance the quality and effectiveness of decision-making process.

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