972 research outputs found
MPC Approach for Synchronized Supply Chains of Perishable Goods
Trabalho apresentado em 7th International Conference on Industrial Engineering and Systems Management (IESM’17), 2017,Saarbrucken, GermanyThe movement of perishable goods is growing
worldwide. Perishable goods need to be available to the market
before the expiration date. With the decrease in inventory levels
the components of a supply chain become even more integrated
and dependent on coordinated decisions. Information regarding
perishable goods must be visible throughout the supply chain for
avoiding goods loss. A Model Predictive Control (MPC) heuristic
to address operations management at supply chains of perishable
goods is proposed in this paper. The approach is capable to
follow the remaining time until expiration date which is critical
to avoid losses. The supply chain is modeled using a state-space
representation and operations management at the supply chain is
formulated as an MPC Problem. In order to cope with operational
decisions, the problem is solved on a periodic basis. The proposed
approach is capable to deal with production decisions, monitor
work-in-progress (WIP), and make transport assignments while
monitoring the remaining time until the expiration date. Flows
over the supply chain can be synchronized and therefore we
named this type of supply chain a Synchronized Supply Chain
(SSC). The approach is modular and easily scalable for largescale
supply chains. Numerical results illustrate these statements.info:eu-repo/semantics/publishedVersio
Correction to: Capillary Interaction and Self-Assembly of Tilted Magnetic Ellipsoidal Particles at Liquid Interfaces ((2018) 3:11 (14962?14972) DOI: 10.1021/acsomega.8b01818)
© 2019 American Chemical Society. We would like to correct the following minor errors in the paper: Figure 3 legend: Blue data points should be ss sims, red data points should be tt sims, blue line should be ss elliptical, and red line should be tt elliptical. Figure 3 caption, lines 4 and 5 should read, ...for the side-to-side configuration (blue) and the tip-to-tip configuration (red). p 14965, column 2, paragraph 2, lines 8-10 should read, ...has a higher energy compared to the 1/r12 2 power law, whereas the tip-to-tip configuration has a lower energy... The above corrections do not change any of the conclusions of the paper
Capillary interaction and self-assembly of tilted magnetic ellipsoidal particles at liquid interfaces
Copyright © 2018 American Chemical Society. Magnetic ellipsoidal particles adsorbed at a liquid interface provide exciting opportunities for creating switchable functional materials, where self-assembly can be switched on and off using an external field [Davies et al., Adv. Mater., 2014, 26, 6715]. In order to gain a deeper understanding of this novel system in the presence of an external field, we study the capillary interaction and self-assembly of tilted ellipsoids using analytical theory and finite element simulations. We derive an analytical expression for the dipolar capillary interaction between tilted ellipsoids in elliptical polar coordinates, which exhibits a 1/r2 power law dependence in the far field (i.e., large particle separations r) and correctly captures the orientational dependence of the capillary interactions in the near field. Using this dipole potential and finite element simulations, we further analyze the energy landscape of particle clusters consisting of up to eight tilted ellipsoids in contact. For clusters of two particles, we find that the side-to-side configuration is stable, whereas the tip-to-tip configuration is unstable. However, for clusters of more than three particles, we find that circular loops of side-to-side particles become globally stable, whereas linear chains of side-to-side particles become metastable. Furthermore, the energy barrier for the linear-to-loop transition decreases with increasing particle number. Our results explain both thermodynamically and kinetically why tilted ellipsoids assemble side-to-side locally but have a strong tendency to form loops on larger length scales
Liquid drops attract or repel by the inverted Cheerios effect
European Union Grant CIG 618335. S.K. acknowledges financial support from NWO through VIDI Grant 11304. A.P. and J.H.S. acknowledge financial support from European Research Council Consolidator Grant 616918
Critical Micronutrients in Pregnancy, Lactation, and Infancy: Considerations on Vitamin D, Folic Acid, and Iron, and Priorities for Future Research
The Early Nutrition Academy and the European Commission-funded EURRECA Network of Excellence jointly sponsored a scientific workshop on critical micronutrients in pregnancy, lactation, and infancy. Current knowledge and unresolved questions on the supply of vitamin D, folic acid, and iron for pregnant women, lactating women, and infants, and their health effects were discussed. The question was addressed of whether, and under which circumstances, supplementation with these micronutrients in addition to usual dietary intakes is advisable. The workshop participants concluded that public health strategies for improving supplementation with these micronutrients in pregnancy, lactation, and infancy are required. Further research priorities should focus on adequately powered human intervention trials to obtain a stronger evidence base for the amounts of vitamin D, folic acid, and iron that have optimal effects on health. The conclusions of the workshop should help to inform the scientific community as well as public health policy strategies. Copyright (C) 2011 S. Karger AG, Base
Brazil
Biological and Soft Matter Physic
- …