Nowadays, the majority of construction projects can be considered as complex and ambiguous endeavours. Each kind of construction project has its own characteristics and complexities whereas then specific management approaches and solutions are needed. Regarding the rapid development of cities, underground constructions at urban regions, such as metro construction, have been largely used for ext...

Ethernet has evolved from a local area to a wide area network technology. When it is used in a service provider environment, it has more complex requirements, which demand a set of management techniques for the Ethernet layer. Ethernet OAM comprises a set of management techniques for Carrier (or Metropolitan) Ethernet networks. Carrier Ethernet devices often have IP connectivity for management ...

In this article, we focus on the challenges and opportunities for broadband access deployment in India. We present an overview of the broadband scenario in India and the existing network architectures. We then review next generation technologies for broadband access including Metro Ethernet. We demonstrate how an optimal access architecture based on metro Ethernet can be developed for cost effe...

Many fire evacuation models have been proposed in recent years to better simulate such as an emergency situation. However most of them do not respect a recommendation of fire evacuation experts regarding the fact that evacuees should follow the boundaries of obstacles or wall to find the exits when their visibility is limited by smoke. This paper presents an agent-based evacuation model with Sm...

This paper analyzes a model with multiple firms (providers), and two classes of customers. These customers classes are characterized by their attitude towards ‘congestion’ (caused by other customers using the same resources); a firm is selected on the basis of both the prices charged by the firms, and the ‘congestion levels’. The model can be represented by a two-stage game: in the first provid...

We investigate the problem of creating simplified representations of polygonal paths. Specifically, we look at a path simplification problem in which line segments of a simplification are required to conform with a restricted set of directions C. An algorithm is given to compute such simplified paths in O(|C|n) time, where n is the number of vertices in the original path. This result is extende...

It is our pleasure to introduce this issue from Public Transport with a selected set of the papers that were presented at the 12th Conference of Advanced Systems for Public Transport (CASPT12) held by the Department of Transport Engineering and Logistics of the Pontificia Universidad Católica de Chile and its Bus Rapid Transit Centre of Excellence in Santiago, Chile on July 23–27 2012. CASPT ha...

Ethernet has evolved from a local area to a wide area network technology. When it is used in a service provider environment, it has more complex requirements, which demand a set of management techniques for the Ethernet layer. Ethernet OAM comprises a set of management techniques for Carrier (or Metropolitan) Ethernet networks. Carrier Ethernet devices often have IP connectivity for management ...

Towards EÆ ient Pa ket Swit hing Metro WDM Networks Martin Maier, Martin Reisslein, and Adam Wolisz Abstra t| In this paper, we brie y overview the urrent state{of{the{art of opti al WDM networking. We thereby point out that the ubiquitous SONET/SDH{WDM metro rings are likely to be ome a serious bottlene k between high{speed lo al area networks/broadband a ess te hnologies and WDM ba kbone netw...