Performance Evaluation of Finite Queue Switching Under Two-Dimensional M/G/1(m) Traffic

Abstract

In this paper we consider a local area network (LAN) of dual mode service where one is a token bus and the other is a carrier sense multiple access with a collision detection (CSMA/CD) bus. The objective of the paper is to find the overall cell/packet dropping probability of a dual mode LAN for finite length queue M/G/1(m) traffic. Here, the offered traffic of the LAN is taken to be the equivalent carried traffic of a one-millisecond delay. The concept of a tabular solution for two-dimensional Poisson's traffic of circuit switching is adapted here to find the cell dropping probability of the dual mode packet service. Although the work is done for the traffic of similar bandwidth, it can be extended for the case of a dissimilar bandwidth of a circuit switched network.

Removal of Chromium from Tannery Effluent Using Chitosan-Charcoal Composite

“…To prepare the chitosan-charcoal composite, the used chitosan was obtained from the shrimp shell by using standard method 10 . A composite bio-adsorbent was prepared by coating chitosan onto charcoal as reported in the literature 14 .…”

“…The XRD pattern in Fig.2(a). showed diffraction peak at 2θ = 10º and 21º which is a typical fingerprints of semi-crystalline chitosan 10 . The diffraction peak at 2θ = 21º of chitosan was shifted to about 2θ = 25º of chitosan-charcoal composite ( Fig.2.…”

“…The morphology of chitosan-charcoal composite biopolymer was studied by Scanning Electron microscope (SEM). It is observed (Fig.3.) that chitosancharcoal composite biopolymers has non homogenous, non smooth surface with some porous straps and shrinkage and fibril structures whereas chitosan shows non homogenous and non smooth surface with strips and shrinkage 10 .…”

“…Chitosan (DD=72%) was obtained from shrimp shell and characterized as reported earlier 10 . About 50 g of chitosan was slowly added to 1000 mL of 10 wt% oxalic acid with constant stirring.…”

“…Chitosan (2-amino-2-deoxy-β-D-glucopyranose) ( Fig.1.(b).) is a deacetylated derivative of chitin (2-acetamino-2-deoxy-β-Dglucopyranose) 10 ( Fig.1.(a). ).…”