Perturbation Theory for the Transport Properties of Multicomponent Glass Melts

A first-order theory is presented for the calculation of the effects of compositional variation on the transport properties of glass melts. The theory is based upon the modified Enskog theory applied to the high-temperature expansion of the free energy. The theory is applied to a simple two-component glass system and compared to experimental and previous theoretical results.     

Rendezvous Point Relocation in Protocol Independent Multicast-Sparse Mode

Protocol Independent Multicast-Sparse Mode is the most widely used multicast routing architecture. It builds a shared distribution tree centered at a rendezvous point and then builds source-specific trees for those sources whose data rate warrants it. Current implementations of the protocol decide on the rendezvous point administratively, which leads to congestion and delays. An attractive solution would be dynamic relocation of the rendezvous point depending on the members of the multicast group. In this paper we present a rendezvous point calculation and relocation mechanism for Protocol Independent Multicast-Sparse Mode. Simulation of the proposed mechanisms is used to demonstrate the effectiveness of the proposals.     

Role of Process Variables on Solid Particle Erosion of Polymer Composites: A Critical Review

This paper presents a review of the reported research works that are related to the solid particle erosion behavior of polymers and polymeric composites. Attention is paid to the effects of test parameters such as erodent type, size of the erodent, impingement angle, impact velocity and stand of distance. on the erosion wear rate of polymer composites. Various predictions and models proposed by different authors to describe and quantify the erosion rate are mentioned and their suitability is checked. Recent findings on the erosion response of multi-component hybrid composites are also presented. Lastly the implementation of design of experiments and statistical techniques in making the parametric appraisal of the erosion process of composites is discussed.     

Comparison of the Mechanical and Thermo-Mechanical Properties of Unfilled and SiC Filled Short Glass Polyester Composites

This paper presents a comparison between particulate filled (SiC particles) and unfilled glass polyester composites on the basis of their mechanical and thermo-mechanical properties. The results show that particulate filled composites have a decreasing trend in mechanical properties when compared to the unfilled glass polyester composites. In particulate filled composites, the tensile and flexural strength of the composites decrease with the addition of 10 wt.-% SiC particles but increase with 20 wt.-% SiC particles. In the case of the unfilled glass polyester composite, the tensile and flexural strength of the composites increase with an increase in the fiber loading. However, higher values of tensile strength and flexural strength of particulate filled glass polyester were found than that of the unfilled glass polyester composite. In the case of thermo-mechanical and thermal properties, the particulate filled composites show better dynamical and thermal properties when compared to the unfilled glass polyester composites. The mechanical and thermal properties (i.e. thermal conductivity) are also calculated using FE modeling (ANSYS software) and the results from this simulation shows good agreement with the experimental results.