The purpose of this work is to compare propagation models for small urban cells in GSM 900 and 1 800, with the aim of testing their behaviour. With this objective in mind, a measurement campaign in co-operation with the Portuguese GSM operator Telecel was carried out in two distinct areas of Lisbon: Arco Cego, characterised by narrow streets with low buildings, and Avenidas Novas, with large st...

In aiming to decrease the number of casualties and people with difficulty in wide-area evacuations due to a large earthquake, it is highly important to visualize and quantify the potential danger in residential areas. In this paper, we construct a multi-agent simulation model, which describes property damage (such as building-collapse, the spread of fire and blocking of streets) and people’s ev...

Visibility is an important factor of environmental quality that has various influences on the quality of neighborhood. This paper aimed to find the relationship between urban form and visual quality. A public space with a spatial configuration in one of Bushehr city's neighborhoods was selected as the case study. Bushehr city is surrounded by urban development and the sea. Compact urban spac...

This paper concerns the inverse problem of localising an impulsive acoustic source in an urban environment using measurements from multiple receivers (microphones) distributed through the propagation domain. In free space the inverse problem is readily solved by Time Difference Of Arrival (TDOA) localisation. In urban environments there may not be a lineof-sight (LOS) between the source and eac...