Background: The construction of metro lines is a high-risk project. Using a budget-based model for the safety units of metro construction projects can help safety managers to spend optimal budget allocation. The purpose of this study was to plan a budget model based on safety unit performance in an under construction metro station for better budget allocation using robust optimization. Methods...

1 As the metropolitan city in Western China, Chengdu has been suffered from serious 2 traffic congestion. The strategy of urban public transport priority was put into agenda to 3 relieve traffic congestion. But the public transport sharing rate is only 27% in Chengdu 4 which is much lower than the developed country. Consequently, it is of great importance 5 to study the measures to improve the ...

Mr. Vukan R. Vuchic deals with the latest developments of metro networks and with their future state in the 21st century. He recalls the basic characteristics of metro and the positive and stimulating role it can play in large cities. While its first networks were opened more than a century ago, metro still knows an important growth: for example, it is the best adapted means of transport in som...

Articles 7 What Makes an Early Adopter? Transforming Landscapes One Farmer at a Time by Alicia Calle, MESc 2008 15 Ignorance or Exclusion? Forest Knowledge and Social Hierarchies in Community-Level Conservation in the Petén, Guatemala by Micha Rahder, MESc 2008 21 Conservation in Flux: Pursuing Social Resilience in Mozambique and Peru by James Leslie, joint MESc-MBA 2008 28 Understanding Stakeh...

BACKGROUND Because of the high concentration of oil refining and petrochemical facilities, the industrial area of the lower Mississippi River of South Louisiana has been termed the Industrial Corridor and has frequently been referred to as the "Cancer Corridor". AIMS To quantitatively assess the "Cancer Corridor" controversy based on mortality data available in the public domain, and to ident...

positive impact metro cell antennas with narrow vertical beamwidth and electrical downtilt can have on heterogeneous cellular networks. Using a model of random cell placement based on Poisson distribution, along with an innovative 3D building model that quantifies blockage due to shadowing, it is demonstrated that network spectral efficiency and average user throughput both increase as vertical...

The establishment of corridors can offset the negative effects of habitat fragmentation by connecting isolated habitat patches. However, the practical value of corridor planning is minimal if corridor identification is not based on reliable quantitative information about species-environment relationships. An example of this need for quantitative information is planning for giant panda conservat...

This study aimed to detect and to identify the main strains of airborne microorganisms present in the Shanghai Metro system. Samples were collected using agar plates exposed to the air and microorganisms were identified using catalase, plasma coagulase and hymolytic analysis. The results show that the concentration of mildew present within a newly opened metro line was significantly higher than...