As cellular packet data services become widely deployed by the rollout of the networks such as General Packet Radio Service (GPRS) and 3G cellular networks, packet-switched voice service such as voice over IP (VoIP) can soon be expected to be offered as an alternative to circuit-switched voice service. While circuit-switched voice offers better quality, packet-switched voice offers better resou...

Circuit-switched communication networks have been analyzed extensively in the stationary case, i.e. where the arrival and/or service rates are time-independent. In this paper, we study a circuit-switched network where the external arrival rates to the network are time-dependent functions. The circuit-switched network is modelled as a nonstationary queueing network with population constraints, w...

In this paper, a generalized buck-boost Z-H converter based on switched inductors is proposed. This structure consists of a set of series connected switched-inductor cells. The voltage conversion ratio of the proposed structure is adjusted by changing the number of cells and the duty cycle. Like the conventional Z-H converter, the shoot-through switching state and the diode before LC network ar...

In this study, we present the analysis of the interconnection network of a distributed Information Retrieval (IR) system, by simulating a switched network versus a shared access network. The results show that the use of a switched network improves the performance, especially in a replicated system because the switched network prevents the saturation of the network, particularly when using a lar...

This paper focuses on the threat of packet sniffing in a switched environment, and briefly explores the effect in a non-switched environment. Detail is given on techniques such as "ARP (Address Resolution Protocol) spoofing", which can allow an attacker to eavesdrop on network traffic in a switched environment. Third party tools exist which permit sniffing on a switched network. The result of r...