High speed wind tunnels are widely used in the study of fluid flow behavior around various objects. The air flow in the starting step of supersonic wind tunnels is transient including strong shock waves caused by the interaction of the tunnel main stream and the boundary layer at walls. To arrive in running step, the tunnel must be designed so as these waves leave immediately the test section. ...

A novel flow control protocol is presented for Availability Bit Rate (ABR) service in Asynchronous Transfer Mode (ATM) networks. This scheme features periodic explicit rate feedback that enables precise allocation of link bandwidth and buffer space on a hop-by-hop basis to guarantee maximum throughput, minimum cell loss, and high resource efficiency. With the inclusion of resource management ce...

Experiments were conducted to measure the dendrite tip growth velocities of equiaxed dendritic crystals settling in an undercooled succinonitrile (SCN)-acetone melt. The tip velocities were measured as a function of the settling speed of the crystal and the Eulerian angle between the dendrite arms and the flow direction relative to the crystal. The average of the measured tip growth velocities ...

Accurate, real-time traffic speed data are important inputs to successful freeway traffic management systems. Unfortunately, vehicle speeds cannot be directly measured by single-loop detectors, which are the most common detectors available in current freeway infrastructures. Algorithms are required to estimate speed using single-loop measurements. In this paper, we present a two-step speed esti...

With advent of Intelligent Transportation Systems (IST), it is required that the observation and control of traffic demand and flow be performed in real-time with more accuracy and reliability than before. In order to accelerate the traffic flow simulation the paper presents an algorithm for the decomposition of a mesoscopic traffic flow model for a parallel implementation on multiprocessor har...

A new moving staggered mesh discretization for the numerical simulation of incompressible flow problems involving free-surfaces is presented. The method uses the staggered mesh to obtain speed and conservation properties. Mesh motion provides a high quality mesh in the interior and detailed resolution of the free-surface motion on the surface. Mesh flipping allows for optimal mesh connectivity ...

This paper demonstrates the requirement of smart tolling systems for smart highway. In smart highway operators and drivers would be able to see in real time the information of traffic. The smart highway is next generation road aimed at Congestion Free, Stop Free and Accident Free through traffic information services. This study defines requirements and functions for development of smart tolling...

The movement of single and group cars in traffic flows was investigated during the work. These studies are used to calculate vehicle delay time maneuvers through crossings adjacencies at same level. On basis data obtained, technical economic discussion cross-sectional or adjoining parameters under consideration can be made. In course study, examination will conducted on influence intensity, vel...