A new packet switch architecture using two sets of time-division multiplexed buses is proposed. The horizontal buses collect packets from the input links, while the vertical buses distribute the packets to the output links. The two sets of buses are connected by a set of switching elements which coordinate the connections between the horizontal buses and the vertical buses so that each vertical...

The objective of this study is to determine the occupant/driver exposure in public transport buses running on biodiesel (B20) and ultra low sulfur diesel (ULSD) buses in the city of Toledo, Ohio. This paper also presents a protocol used for carrying out an experimental study involving continuous monitoring of real-time in-vehicle pollutant concentrations. In-vehicle concentrations of six air po...

Introduction Giorgio Gallo Federico Di Miele Dispatching Buses in Parking Depots Department of Computer Science, University of Pisa, Corso Italia 40, 56125 Pisa, Italy [email protected] Among the many different problems arising in the day-by-day operations of urban transportation companies, the problem of optimally managing the parking space in a vehicle depot has attracted little attention. Th...

tem, the signal returns to a background cycle (2). For example, in many applications priority requests are simply inhibited for a certain number of cycles or minutes after a priority interruption so as to ensure that other phases recover. This kind of blunt strategy limits the potential effectiveness of signal priority. Further complicating matters, buses turning into and out of a terminal tend...

The main reasons agencies consider hybrid transit vehicles are fuel savings and reduced emissions. Hybrid electric buses offer an attractive option and have the potential to reduce operating costs for transit agencies significantly. Wayne et al. (2009) estimated that use of diesel-electric hybrid buses in 15 percent of the US transit fleet could reduce fuel consumption by 50.7 million gallons o...

This paper describes the design, implementation, analysis, and evaluation of a Practical Buses protocol for anonymous network communication. The protocol, based on the metaphor of a city bus, provides connection anonymity for Internet-based communication. We modify the original Buses protocol from the literature to provide receiver anonymity, strengthen security, and improve efficiency and scal...

There is significant confusion in the space industry today over the terms used to describe satellite bus architectures. Terms such as “standard bus” (or “common bus”), “modular bus” and “plug-and-play bus” are often used with little understanding of what the terms actually mean, and even less understanding of what the differences in these space architectures mean. It may seem that these terms a...

In this paper, we report our experiences and findings on the design of a fault-tolerant bus architecture comprised of two COTS buses, the IEEE 1394 and the I2C. This fault-tolerant bus is the backbone system bus for the avionics architecture of the X2000 program at the Jet Propulsion Laboratory. COTS buses are attractive because of the availability of low cost commercial products. However, they...