Entropy is a basic and important concept in information theory. It is also often used as a measure of the unpredictability of a cryptographic key in cryptography research areas. Ubiquitous computing (Ubi-comp) has emerged rapidly as an exciting new paradigm. In this special issue, we mainly selected and discussed papers related with ore theories based on the graph theory to solve computational ...

Iron ore pellets are sintered, centimetre-sized spheres of ore with high iron content. Together with carbonized coal, iron ore pellets are used in the production of steel. In the transportation from the pelletizing plants to the customers, the iron ore pellets are exposed to different loading situations, resulting in degradation of strength and in some cases fragmentation. For future reliable n...

A significant contemporary challenge for gold mining companies is to define economic process options for treating more complex ore bodies as the less refractory ores become depleted. Demonstration of economic treatment options allows gold companies to maintain and increase their ore reserves. The selection of options to treat a specific ore is significantly impacted by factors such as mineralog...

Abstract Although phosphate rock has been considered as a potential new rare earth elements (REEs) resource, the recovery of REEs from is impeded by technical challenges and cost issues. This study investigated effects operation conditions on leaching efficiencies phosphorus Zhijin ore, large deposit in China. The process overtime was also studied chemical analysis, scanning electron microscope...

Young's modulus determines the mechanical loads required to elastically stretch a material, and also, bend it, given that bending stretches one surface while compressing opposite one. Flexoelectric materials have additional property of becoming electrically polarized when bent. While numerous studies characterized this flexoelectric coupling, its impact on response, due energy cost polarization...

Abstract The main obstacle that hinders the application of fuel cell fuels for vehicles today is hydrogen storage tube. Therefore, this paper will report results a study on MgH 2 -based materials with Fe O 3 catalyst inserted (5 wt%, 10 15wt%) and prepared by mechanical alloying technique hours. samples were obtained from Lhoong Setia Mining site in Jantang Village, Lhoong, Aceh Besar. initial ...