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The micromixing time of impinging thin liquid sheets depends upon the energy dissipation rate. The kinetic energy released by the impingement has been previously studied and was found to be a function of the coefficient of restitution of the collision. In this work, the volume within which the released kinetic energy is dissipated was investigated. The volume of energy dissipation was determined by measuring the time required for the velocity of the single sheet (prior to the collision) to be reduced to the velocity in the mixed sheet (after the collision). Although different, the velocity in single sheets and the velocity in mixed sheets has been previously shown to be constant. High-speed video was used to measure the velocity of features, generated in the front single sheet, as they passed through the impingement zone and into the mixed sheet. The experimental results showed that the time required for the velocity change was approximately equal to the residence time of liquid in the impingement zone. A new equation for the energy dissipation rate was developed and compared with the energy dissipation rate derived from turbulence energy-cascade theory. This comparison showed that the large-eddy turnover time was approximately equal to the residence time in the impingement zone; a result that is in accordance with the notion from turbulence energy-cascade theory that large, energy-containing eddies lose their energy within approximately one large-eddy turnover time. Within the impingement zone, the large-eddy kinetic energy was found to decay exponentially with time., Comment: Accepted for publication in Chemical Engineering Science

We leverage data on 1,857 families in 140 rural cocoa-growing communities of Côte d'Ivoire to report on child work activities and schooling decisions. We distinguish between unpaid domestic labor and unpaid agricultural child labor activities reported by children in 2021 during the COVID-19 pandemic. We find that more than 80% of children participate in at least one household work activity and more than 50% in at least one agricultural work activity, with differences between boys and girls. Older boys performed more unpaid agricultural work activities, and girls performed more domestic work activities. Thirty-five percent of children were engaged in unpaid agricultural child labor, a rate similar to a national estimate of child labor in cocoa-growing communities of Côte d'Ivoire in 2018/19. Agricultural child labor and schooling are predicted by a child's age and gender, household factors such as parental age, family size, multidimensional poverty, and community factors, especially community-level child labor rates. Social protection and education programs targeting older boys could improve their schooling outcomes and reduce agricultural child labor. Likewise, addressing acute poverty with multifaceted programs reducing consumption-based poverty, poor parental education, and improving community infrastructures could reduce child labor.

We respond to David Steigmann's discussion of our paper "A general theory for anisotropic Kirchhoff-Love shells with in-plane bending of embedded fibers, Math. Mech. Solids, 28(5):1274-1317" (arXiv:2101.03122). His discussion allows us to clarify two misleading statements in our original paper, and confirm that its formulation is fully consistent with the formulation of Steigmann. We also demonstrate that some of our original statements criticized by Steigmann are not wrong., Comment: 7 pages, 1 figure

This study analyzed 16,799 journal papers and 98,773 conference papers published by IEEE Xplore in 2016 to investigate the relationships among usage counts, Mendeley readership, and citations through descriptive, regression, and mediation analyses. Differences in the relationship among these metrics between journal and conference papers are also studied. Results showed that there is no significant difference between journal and conference papers in the distribution patterns and accumulation rates of the three metrics. However, the correlation coefficients of the interrelationships between the three metrics were lower in conference papers compared to journal papers. Secondly, funding, international collaboration, and open access are positively associated with all three metrics, except for the case of funding on the usage metrics of conference papers. Furthermore, early Mendeley readership is a better predictor of citations than early usage counts and performs better for journal papers. Finally, we reveal that early Mendeley readership partially mediates between early usage counts and citation counts in the journal and conference papers. The main difference is that conference papers rely more on the direct effect of early usage counts on citations. This study contributes to expanding the existing knowledge on the relationships among usage counts, Mendeley readership, and citations in journal and conference papers, providing new insights into the relationship between the three metrics through mediation analysis., Comment: 23 pages, 7 figures