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Delimitation of service areas in reverse logistics networks with multiple depots
Ramos, T.; Oliveira, R.C.WOS:000290258800003 (Nº de Acesso Web of Science) ; “Prémio Científico ISCTE-IUL 2012” ; This paper describes a heuristic approach for the definition of service (or influence) areas of multiple depots in a reverse logistics network. This work is based on a case study: the recyclable waste collection system with 5 depots that covers seven municipalities in the Alentejo region, southern Portugal. The system opt...
Magnesium doping on brownmillerite Ca2FeAlO5
Malveiro, J.; Ramos, T.; Ferreira, L. P.; Waerenborgh, J. C.; Nunes, M. R.; Godinho, M.; Carvalho, M. D.Ca2FeAl1-xMgxO5 (x=0, 0.05 and 0.1) compounds adopting the brownmillerite-type structure were prepared by a self-combustion route using two different fuels. Characterisation was performed using X-ray powder diffraction, Mössbauer spectroscopy, magnetisation measurements, chemical analysis, scanning electron microscopy and 4-point dc conductivity measurements. Global results indicate that the solubility limit wa...
Structural and Magnetic Characterization of the Series La1-xSrxFe0.8Cr0.2O3-δ (...
Ramos, T.; Carvalho, M. D.; Ferreira, L. P.; Cruz, M. M.; Godinho, M.A series of perovskite compounds with the general formula La1-xSrxFe0.8Cr0.2O3-δ (x = 0.2, 0.4, 0.6, and 0.8) have been synthesized using a urea/nitrates self-combustion route. Their characterization was performed using room-temperature X-ray diffraction, electrical and magnetization measurements. A structural transition from orthorhombic (x = 0.2) to rhombohedral (x > 0.2) was determined. Among the rhombohedra...
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