Purpose: Urban rail transit is a complex and dynamic system, which is difficult to be described in a global mathematical model for its scale and interaction. In order to analyze the spatial and temporal characteristics of passenger flow distribution and evaluate the effectiveness of transportation strategies, a new and comprehensive method depicted such dynamic system should be given. This stud...

Subway systems span most large cities, and railway networks most countries in the world. These networks are fundamental in the development of countries and their cities, and it is therefore crucial to understand their formation and evolution. However, if the topological properties of these networks are fairly well understood, how they relate to population and socio-economical properties remains...

This master’s thesis attends to the needs in a control room at a subway corporation. The aim is to develop a software prototype to support the operators in their work and thereby enhance the safety at the subway. The aim is followed by two main questions: How can an interactive decision support system be developed to support the operator and enhance the safety? Can a new kind of workplace with ...

Chemical agents have been used previously in wartime on numerous occasions, from World War I to the Gulf War. In 1994 and 1995, sarin nerve gas was used first in peacetime as a weapon of terrorism in Japan. The Tokyo subway sarin attack was the first large-scale disaster caused by nerve gas. A religious cult released sarin gas into subway commuter trains during morning rush hour. Twelve passeng...

Recently, many studies have tried to find travel patterns to understand citizen’s movement behaviours and improve transportation services based on the big data in public transportation systems. This research introduces a method of discovering and evaluating spatial movement patterns from smart card transaction data of multi-modal transportation networks such as subway and bus. The transaction d...

Subway transportation system is a new phenomenon in Iran. Noise annoyance interferes with the individual's task performance, and the required alertness in the driving of subway trains. This is the first study conducted to measure the level of noise and noise annoyance among conductors of subway organization in Tehran, Iran. This cross sectional study was conducted among 167 randomly selected tr...

A rail transit network usually represents the core of a city’s public transportation system. The overall topological structures and functional features of a public transportation network, therefore, must be fully understood to assist the safety management of rail transit and planning for sustainable development. Based on the complex network theory, this study took the Beijing Subway system (BSS...

CHEMICAL WARFARE HAS EXisted for millennia. As far back as 1000 BC, the Chinese used arsenical smoke as a weapon. In the last century, chemical agents have been used in warfare on numerous occasions, from World War I to the Iran-Iraq conflict. The world remains vulnerable to the deliberate use of chemical agents as weapons of mass destruction. Chemical attacks can be delivered with almost any t...