3122043 documents found, page 46098 of 312205

Scheduling of job shop, make-to-order industries with recirculation and assembl...

This work studies the performance of two Mixed Integer Linear Programming (MILP) models to solve scheduling problems in a flexible job shop environment with recirculation and assembly using a due-date-based objective function. The models convey different approaches both in the modelling of time (discrete and continuous approaches) as well as in the assignment of jobs to machines. The comparison is carried out f...

Histological and ultrastructural observations of daphina magna exposed to diamo...

Competitividade e aspectos ambientais da responsabilidade social

Standards on social responsibility

Acute toxicity evaluation of several compounds involved in fossil fuels biodesu...

The increasing use of fossil fuels has led to increased emissions of sulphur oxides into the air, which is a major cause of acid rain. Legislation already adopted in 2009 stipulates that the maximum level of sulphur allowed in fuels is only 10 ppm. The process of hydrodesulphurization (HDS) used in refineries is based on very expensive physico-chemical techniques, and has limitations in the removal of organic s...

Detoxification of olive mill wastewaters using a packed-bed batch reactor

Olive oil production is a traditional agricultural industry in Mediterranean countries and Portugal is one of the ten major producers. This industry generates an effluent, olive mill wastewater (OMW), which does not undergo any treatment and, usually, is stored in evaporation lagoons or spread on the land. Disposal of olive oil mill wastewaters is a serious environmental problem due to its high organic loading,...

Microstructure characterization of ODS-RAFM steels

Results of the microstructural characterization of four different RAFM ODS Eurofer 97 batches are presented and discussed. Analyses and observations were performed by nuclear microprobe and scanning and transmission electron microscopy. X-ray elemental distribution maps obtained with proton beam scans showed homogeneous composition within the proton beam spatial resolution and, in particular, pointed to a unifo...

Roman slag characteristics and distribution in the Portuguese segment of the Ib...

Couto Mineiro do Lena, Portugal : singularidades de uma história quase esquecid...

Iberian Pyrite Belt mining and geological heritage protection and valorization,...