To support a great number of dispersed users in a wider area with high-speed communication services, we develop a large-scale and ultra high-speed MAN based on hierarchical ring con®guration. The network is constituted by backbone and local rings, which are connected by bridges. In such a network, trac congestion may always occur due to the mismatch of transmission speed between backbone and l...

In most of the developing countries, the metropolitan organizations do not assess the safety consequences of alternative transportation systems and one of the reasons is the lack of suitable methodology. The goal of this paper is to develop practical tools for assessing safety consequences of arterial roads in the context of long-term urban transportation plans in Dhaka city, the capital of Ban...

The gap between the access time of primary and secondary storage technologies, often called the access gap, has long constrained the performance of computer systems. Unfortunately, this gap is growing, not shrinking. While today’s technologies improve the capacity of both of these storage media at a furious pace, they are not as successful at reducing access times. Instead, the speed of computa...