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Carbon Nanotube-Textured Sand for Controlling Bioavailability of Contaminated Sediments

Nano Research 2010年第6期3卷 412-422页

作者： Xingmao Ma deepti anand Xianfeng Zhang Mesfin Tsige Saikat Talapatra Department of Civil and Environmental Engineering Southern Illinois University CarbondaleIL 62901USA Department of Physics Southern Illinois University CarbondaleIL 62901USA

Sand particles textured with multi-walled carbon nanotubes (MWCNTs) can efficiently control the mobility and bioavailability of contaminants found in aquatic sediments. Adsorption measurements for a wide variety of aquatic contaminants (chlorinated hydrocarbons) on MWCNT-textured sand showed orders of magnitude increase in their sorption coefficients compared to traditional materials (sand) when used for physically separating contaminated sediments from overlying water. Molecular dynamics simulations performed on model experimental systems emphasize that the hydrophobic interactions of the MWCNT surfaces play a crucial role in driving the water molecules away, promoting such enhanced contaminant uptake. The MWCNT-textured sand significantly reduced the migration of contaminants from sediments to overlying water and possesses suitable parameters needed for contaminant sequestration and sediment remediation technologies. The single step and scalable procedure described here for synthesizing robust MWCNT-textured sand surfaces will provide important improvements in the field of remediation/aquatic environment restoration technologies.

关键词： Multi-walled carbon nanotube(MWCNT)-textured sand in situ capping capping amendments chlorinated compounds

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Modeling multi-generational diffusion for competitive brands:an analysis for telecommunication industries

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Journal of Management Analytics 2021年第4期8卷 715-740页

作者： Gunjan Bansal Adarsh anand deepti Aggrawal Department of Operational University of DelhiDelhiIndia University School of Management and Entrepreneurship Delhi Technological UniversityDelhiIndia

Manufacturers keep bringing necessary rectifications in the products to achieve constant market penetration and high customer *** present paper proposes a modeling framework wherein the impact of customer satisfaction with the first generation of a product is measured and its significant role has been incorporated in the adoption of a subsequent generation of the *** model also integrates the influence of competition which is classified under two categories such that:-(a)competition within successive generations of the brand;and(b)competition among different ***,model validation is performed using telecommunication industry sales data and sales are forecasted in two different ways *** secondary data(a formal way)and primary data;where a survey of first-generation consumers is carried out and the concept of brand switching analysis and logistic regression have applied to analyze the market switching behavior and the satisfaction measure in the proposed models.

关键词： OR in marketing brand switching analysis diffusion modeling industrial marketing logistic regression

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