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"Multi-tier supply chain network design: A key towards sustainability a" by Ahmed Mohammed, Kannan Govindan et al.

The inescapable need for sustainable supply chains has fascinated controversial attention, in the last two decades, due to increasing governmental regulations and societal awareness. But, facilities and their linkages, within the supply chain network, are subject to perturbations due to natural or human-made events (e.g., strikes and floods). Therefore, managers are concerned about re-engineering a supply chain network that is simultaneously sustainable and resilient. Hence, there is an inevitable need to embrace sustainability and resilience at a strategic level for the supply chain management. Motivated by this necessity, this paper presents a new panacea methodology towards a sustainable and resilient (susilient, henceforth) two-tier supply chain network design (S-2TSCND). To this end, an extended exploration regarding the relationship and completeness between sustainability and resilience, in the supply chain context, was explored and discussed. It presents a new term for “susili ....

Multi Objective Optimization , Usilient Supply Chain , Sustainability And Resilience ,

Mining the right transition metals in a vast chemical space

MIT's Kulik Lab has designed better ways of discovering and designing novel, environmentally benign, and energy-efficient materials for energy applications in a vast chemical space where molecular combinations that offer remarkable optical, conductive, magnetic, and heat transfer properties await discovery. ....

Heatherj Kulik , Chemical Engineering , Chenru Duan Phd , Nature Computational Science , Mit Chemical Engineering , Ulik Lab , Heatherj Kulik , Chenru Duan , Hemical Discovery , Ransition Metal Chromophore , Density Functional Theory , Transition Metal Complexes , Multi Objective Optimization ,

"Development of a more accurate Geant4 quantum molecular dynamics model" by Yoshi Hide Sato, Dousatsu Sakata et al.

Objective. Although in heavy-ion therapy, the quantum molecular dynamics (QMD) model is one of the most fundamental physics models providing an accurate daughter-ion production yield in the final state, there are still non-negligible differences with the experimental results. The aim of this study is to improve fragment production in water phantoms by developing a more accurate QMD model in Geant4. Approach. A QMD model was developed by implementing modern Skyrme interaction parameter sets, as well as by incorporating with an ad hoc α-cluster model in the initial nuclear state. Two adjusting parameters were selected that can significantly affect the fragment productions in the QMD model: the radius to discriminate a cluster to which nucleons belong after the nucleus-nucleus reaction, denoted by R, and the squared standard deviation of the Gaussian packet, denoted by L. Squared Mahalanobis’s distance of fragment yields and angular distributions with 1, 2, and the higher atomic number ....

Hadron Therapy , Multi Objective Optimization , Uantum Molecular Dynamics ,

"Blast response and multi-objective optimization of graded re-entrant c" by Feng Jiang, Shu Yang et al.

Explosion threat has a devastating impact on buildings, warships, vehicles and human lives, which puts forward urgent requirements for the development of explosion protection systems. In this study, a sandwich protection system against close-range blast loads containing graded re-entrant circular (REC) auxetic core was proposed, and its blast-resistance performance was investigated based on the numerical methods validated by the field blast test results in the literature. Numerical results showed that compared with the conventional re-entrant (RE) core with the same mass, the REC core can reduce the maximum displacement (MaxD) of the back panel by 2.2% and increase the energy absorption (EA) of the system by 5.7%. If the two cores share the same cell wall thickness, the REC core can reduce MaxD by 28.0% and increase EA by 2.1%. In addition, the effects of geometric parameters, thickness parameters and gradient parameters on the blast-resistance of REC cored protection system were exami ....

Blast Loading , Multi Objective Optimization , Egative Poissons Ratio ,