Some incidents in urban railway systems affect the function of the subway’s company adversely and they could disorder the services. These events may inflict irreparable damage to passengers, employees and equipment. By recognizing the hazards existing in this type of transportation system and evaluating and prioritizing risks, we can perform appropriate actions to reduce the probability and sev...

An integrated urban transportation system usually consists of multiple transport modes that have complementary characteristics of capacities, speeds, and costs, facilitating smooth passenger transfers according to planned schedules. However, such an integration is not designed to operate under disruptive events, e.g., a signal failure at a subway station or a breakdown of a bus, which have ripp...

Maintenance of subway tunnels and stations is one of the most difficult areas because of limited allowed inspection time and complex environment surrounding the infrastructures. Congested urban buildings and underground facilities make the construction and renovation of subway infrastructures more troublesome. In this paper, 3D information models including geometry models and their related info...

BACKGROUND With an increasing proportion of the population living in cities, mass transportation has been rapidly expanding to facilitate the demand, yet there is a concern that mass transit has the potential to result in excessive exposure to noise, and subsequently noise-induced hearing loss. METHODS Noise dosimetry was used to measure time-integrated noise levels in a representative sample...

We consider a class of highly dynamic networks modelled on an urban subway system. We examine the problem of creating a map of such a subway in less than ideal conditions, where the local residents are not enthusiastic about the process and there is a limited ability to communicate amongst the mappers. More precisely, we study the problem of a team of asynchronous computational entities (the ma...

Little information on the evaluation of airborne particulate matter (APM) and sedimentation particles from subway stations is available. The thermal metamorphism of train wheels generating toxic particles in subway stations is a possibility. In this study, the toxicity and physiological effects of particles from subway stations were evaluated using a yeast bioassay system. Estrogenic and anties...

In order to examine the cognition behaviors of the physical disabled in the spatial environment such as subway system, we implemented the on-site eyetracking experiment in the real subway environment. We hired 12 physical disabled people who sit on the wheelchairs and conducted certain experiment at National Library Station, Beijing Subway. By using SMI-HED eye tracker, we collected physiologic...

BACKGROUND AND OBJECTIVES Although mass transit systems are convenient and efficient for urban people, little attention has been paid to the potential hearing hazard from their noise. The purpose of the current study was to measure and analyze levels of subway interior noise at peak commuter times and to provide information about commuters' daily dose of noise exposure. MATERIALS AND METHODS ...

some incidents in urban railway systems affect the function of the subway’s company adversely and they could disorder the services. these events may inflict irreparable damage to passengers, employees and equipment. by recognizing the hazards existing in this type of transportation system and evaluating and prioritizing risks, we can perform appropriate actions to reduce the probability and sev...

Many cooperated web cache systems and protocols have been proposed. But, these systems need the expensive resources, such as core-link bandwidth and proxy cpu or storage, and need administrative cost to achive enough performance when the client population increases. This paper suggests a self-organizable caching system, called Subway, which is scalable and fault tolerant, with a distributed pee...