Arrays of processors with pipelined optical buses are introduced for the efficient implementation of computationally intensive applications. Techniques for the concurrent transmission of messages over the optical bus to avoid collision of messages is shown. Convenient parallel data movement operations are derived for this architecture, which are then used in the design of parallel algorithms fo...

Passengers overload in public buses has been a problem in Tanzania. Despite some stationing police at different locations for manual check being in place, the overloading of passengers still persists. The current system doesn’t work efficiently as the check is done at random, and it is difficult during the rainy seasons and at night and it is costs and needs labor power. The findings indicate t...

This paper discusses how an Active Power Filter (APF) can be utilized for system-wide harmonic mitigation in a microgrid with multiple sources of harmonic distortion located at different buses. A two-bus microgrid system with independent nonlinear loads at both buses is first investigated analytically, and it is demonstrated that it is possible to derive a harmonic current injection from the AP...

Due to limited metering infrastructure, distribution grids are currently challenged by observability issues. On the other hand, smart meter data, including local voltage magnitudes and power injections, are communicated to the utility operator from grid buses with renewable generation and demand-response programs. This work employs grid data from metered buses towards inferring the underlying g...

Cleaner and less polluting public transport buses based on alternative fuels are of paramount importance if cities are to attain their ambitious emissions reduction targets. Public transport buses are high usage vehicles that operate in heavily congested areas where air quality improvements and reductions in public exposure to harmful air contaminants are critical. As such, they are good candid...

This paper presents an evaluation of battery requirements for hybrid and electric city buses. Technical specifications of recently developed lithium based batteries and vehicle simulation results are used as basis for the evaluation. The battery requirements are evaluated in terms of power and energy capacity, calendar and cycle life as well as costs. Conventional diesel, parallel and series hy...

Mesh connected computers have become attractive models of computing because of their varied special features. In this paper we consider two variations of the mesh model: 1) a mesh with xed buses, and 2) a mesh with reconngurable buses. Both these models have been the subject matter of extensive previous research. We solve numerous important problems related to packet routing, sorting, and selec...

A balanced increase of memory bandwidth and computational performance is one of the current trends towards high performance microprocessors. This improvement can be attained either by replicating resources such as buses and functional units or by making them more complex. For example, some microprocessors, as the IBM’s POWER2 double the width of the buses between the register file and the first...

Developing public transportation and giving priority to buses is a feasible solution for improving the level of public transportation service, which facilitates congestion alleviation and prevention, and contributes to urban development and city sustainability. This paper presents a novel bus operation control strategy including both holding control and speed control to improve the level of ser...

This study monitored the carbon dioxide (CO2) concentrations and temperatures of three 43-seat tour buses with high-passenger capacities in a course of a three-day, two-night school excursion. Results showed that both driver zones and passenger zones of the tour buses achieved maximum CO2 concentrations of more than 3000 ppm, and maximum daily average concentrations of 2510.6 and 2646.9 ppm, re...