<span>Due to the need for multicast connection required by multimedia applications such as video conferencing and natural disaster management, it was necessary use a set of portable connected wireless peripheral devices without infrastructure central router, network "a mobile ad hoc (MANET) " Despite difficulties facing this technology in process effective guidance expansion networks, typ...

Global warming caused by CO 2 emissions makes reactive magnesium cement (RMC) increasingly attractive due to its ability sequester , however, the diffusion of in RMC is severely limited dense hydrated carbonates (HMCs) formed on outer layer. This work utilizes hollow natural fiber (e.g., sisal fiber) facilitate into deep part specimen. Combining with adding silica sand as a filling agent, mecha...

the paper presents the results of an investigation on the acoustic performance of vertical profile parallel barriers with quadratic residue diffuser tops and faces. a 2d boundary element method (bem) was used to predict the barrier insertion loss. the results of rigid and with absorptive coverage were also calculated for comparisons. using qrd on the top surface and faces of all vertical profil...