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Microbial treatment has been considered as an economic, effective and environment safe way of processing coal via degradation of the macromolecular network into simpler, low molecular weight produc...

Construction and demolition waste (CDW) which is produced during new construction, renovation and demolition of buildings and other construction structures is considered priority waste and is generated several million tons globally. India generates 15-23 million tons per year. The recycling and utilization of CDW would be a significant contribution to the environment and sustainable development towards the adoption of “zero waste” principle. One of the promising technologies to convert industrial waste into value added product is geopolymerization and it involves a chemical reaction between solid alumino-silicate oxides and alkaline activator solution at ambient or slightly elevated temperatures. The product thus obtained has high mechanical strength. Two types of CDW, i.e. concrete powder and brick powder, were considered in the present study. Calorimetric analysis showed that brick dust is more reactive than concrete waste. The maximum compressive strength of geopolymer product from brick dust was found...

The production of hairdressing scissors, which are a high value added product, by a metal injection moulding route, using a 440 type hardenable stainless steel powder and a PEG/PMMA composite binder system has been investigated. Previous research has highlighted a number of problems associated with the PM processing of 440 type stainless steels; however, the present study has ascertained that, with careful control of the sintering conditions, a microstructure with finely distributed, spheroidal chromium carbide and high hardness could be attained following subsequent heat treatment.

RESUMEEn raison des caracteristiques relatives a la geometrie de visee des radars a antenne synthetique (RAAS) montes a bord des satellites SEASAT, ERS-1, JERS-1 et RADARSAT, les images acquises par ces capteurs presenteront une sensibilite radiometrique et geometrique a la topographie locale nettement superieure aux images optiques correspondantes obtenues a partir des satellites Landsat et SPOT. Il est absolument essentiel, par consequent, que des modeles numeriques d'elevation fassent partie integrante de toute analyse des capacites des radars. Cet article presente une formulation analytique unifiee d'une methode d'analyse par simulation des RAAS — incluant le geocodage des donnees et la generation de produits a valeur ajoutee — dont le but est de faciliter l'interpretation de la scene. Les auteurs proposent le concept de facteur d'echelle topographique pour quantifier le taux moyen de distorsion geometrique dans une scene RAAS, suppose que l'on connaisse la variabilite de l'elevation d'un site. Un pro...