background: identification of the effective factors in reducing response time in prehospital emergency medical service (ems) can assist in improving its services. this study aimed at reviewing the effect of applying global positioning system (gps) on response time of tehran ems ambulances. materials and methods: of 132 tehran ems stations, 24 ones were randomly selected, and relevant data, incl...

This paper describes the design and implementation of a field trial of a GPS-based road-user charging system held in Newcastle upon Tyne, U.K. Employees from the University of Newcastle upon Tyne were recruited to participate in experiments of both point-based and distance-based charging. To avoid road-user charges for commuting to and from the University during the trial period, volunteers cou...

Accurate estimation of construction production, which is composed of productivity and unit costs, allows construction planners and managers to have excellent control over current processes and to correctly predict the production of similar projects in the future. Due to the need for accurate production estimation, selection of the appropriate construction technology is a critical factor in the ...

During the last decade, pilot studies and focused projects have established the efficacy of the Internet in developing nations;1 however, connectivity remains uncommon and it is generally slow and unreliable.2 The developing nations are too poor to attract sufficient capital to build modern Internet infrastructure.3 The activity of the past decade has had positive results. All governments are n...

Countries with the International Marine time Boundary Line (IMBL) will always has security problems and continuous life threatens for those fishermen whose family’s main economical support is fishing. Even in the peninsular country like India has their boundary limit in the ocean, the people of these coastal regions has the main work of fishing ,due to carelessness or without knowing their boun...

[1] We present the first two aircraft Global Positioning System (GPS)-reflection altimetry measurements, the most precise GPS ocean-altimetry measurement, and demonstrate the altimetric precision and spatial resolution necessary to map mesoscale eddies. Our first experiment demonstrated a 14-cm precision single-satellite ocean altimetry measurement while our more recent experiment demonstrates ...

With the continuous development of the industrialization process, the countries all over the world gradually appeared lack of agricultural labor force and aging phenomenon, which was especially prominent in developed countries. However the agricultural robot with high operating efficiency, high qualities of work will play an increasingly important role in future agricultural production. Robot n...

this paper presents an accurate differential global positioning system (dgps) using multi-layered neural networks (nns) based on the back propagation (bp) and imperialistic competition algorithm (ica) in order to predict the dgps corrections for accurate positioning. simulation results allowed us to optimize the nn performance in term of residual mean square error. we compare results obtained b...

With the continuous development of the industrialization process, the countries all over the world gradually appeared lack of agricultural labor force and aging phenomenon, which was especially prominent in developed countries. However the agricultural robot with high operating efficiency, high qualities of work will play an increasingly important role in future agricultural production. Robot n...