Layered multicast is a scalable solution to data dissemination over the Internet. The performance of layered multicast hinges upon the transmission schedule. In this paper, we study the scheduling problem in the layered multicast context. This work generalizes the extensively studied multicast scheduling problem (layered and non-layered) by introducing simultaneously the data popularity and the...

An approach to a multi-facet task of situation identification by Unmanned Aerial Vehicle (UAV) is presented. The concept of multi-layered identification system based on soft computing approach to reasoning with incomplete, imprecise or vague information is discussed.

Background: Lead-based radiation shields are widely used in radiology departments to protect both workers and patients from any unnecessary exposure to ionizing radiation. Recently there has been a great deal of concern expressed about the toxicity of lead. Human lead toxicity is well documented. In that light, production of environmentally-friendly lead-free radiation shields with less weight ...

A set of non-linear optimisation algorithms are combined with a finite element simulation code to analyse the energy absorption and elastic stress wave propagation problem in multilayer/multimaterial armour systems under ballistic impacts. An Abaqus Python script is used simulate event generate variables post-processing outputs necessary for integration algorithms. number modelling strategies c...