The facility positioning problem concerns the location of facilities such as bus-stops, fire stations, schools, so as to optimize one or several objectives. This paper contributes to research on location problems by proposing a reactive multiagent approach. Particularly, we deal with the p-median problem, where the objective is to minimize the weighted distance between the demand points and the...

The combination and integration of services between mobile computing and context-aware applications responds to the use of mobile devices defining a wide range of distributed user interfaces to support social activities. In this paper, we propose a novel solution that combines social software with context awareness to improve users' interaction in public spaces. This approach is based on the co...

The Distributed Queue Dual Bus (DQDB) protocol or IEEE 802.6 has been accepted as the international standard for Metropolitan Area Networks (MAN). This paper describes a combined M/G/1 and Markov model for the steady state performance analysis of a DQDB network. In the analysis each station is considered independently, but not in isolation, thus avoiding the computational complexity which would...

Different load centers where the energy is utilized are connected to the generating stations through high voltage transmission systems and a low voltage distribution systems. The losses occurring in the distribution network amount to nearly 40% of the total losses. Optimally located Distributed Generation (DG) systems offer multiple benefits in reducing the losses and supplying quality power. I...

Despite the widespread availability of information concerning public transport coming from different sources, it is extremely hard to have a complete picture, in particular at a national scale. Here, we integrate timetable data obtained from the United Kingdom open-data program together with timetables of domestic flights, and obtain a comprehensive snapshot of the temporal characteristics of t...

Based on the current situation and operation of urban bus network stops, this paper uses complex theory to analyse topology constructed network. Taking ChangZhuTan as an example, Space-L method is selected establish a model, topological characteristics different networks are analysed by calculating static indicators (degree, degree distribution, average path length, clustering coefficient, etc....

BACKGROUND The presence and mix of destinations is an important aspect of the built environment that may encourage or discourage physical activity. This study examined the association between the proximity and mix of neighbourhood destinations and physical activity. METHODS Secondary analysis was undertaken on physical activity data from Western Australian adults (n=1394). These data were lin...

While the United States government concentrates more of its political and financial resources on fighting terrorism, the continuing decay of older cities and industrial suburbs has fallen far down on the national political priority agenda. An exception is the redevelopment of so-called brownfields, which are abandoned, idled, or underutilized factories, railroad yards, bus stations, garages, el...

Abstract: We consider a finite-buffer single server queue with single (multiple) vacation(s) under batch Markovian Arrival Process (BMAP). The service discipline is varying number limited service, also called E-limited with limit variation (ELV) where the server serves until either the system is emptied or a randomly chosen limit of l customers have been served. Queue length distributions at va...

Contents As part of the global development of telecommunications networks, Base Transceiver Stations (BTS) are also frequently constructed in Off-Grid locations or Bad-Grid locations. The Sunny Island is very well suited to ensure the electricity supply to a BTS even in such locations due to its flexibility and robustness. Off-Grid systems with Sunny Island are distinguished by the following fe...