The formation of toxic heavy clouds as a result of sudden accidental releases from mobile containers, such as road tankers or railway tank cars, may occur inside urban areas so the problem arises of their consequences evaluation. Due to the semi-confined nature of the dispersion site simplified models may often be inappropriate. As an alternative, computational fluid dynamics (CFD) has the pote...

We have recently witnessed the series of bomb blasts in Dilshuknagar, Hyderabad. Bombs killed many and left many injured. On Feb 22nd two explosions took place with in one hour. And left the world in shell shock and the Indians in terror. This situation is not limited to Hyderabad but it can happen any where and any time in the world. People think bomb blasts can’t be predicted before handled. ...

The vibration generated by railway traffic causes complaints not only about sensible vibration levels, but about significant noise levels in the building lying beside or above rail lines. Therefore numerical methods to predict the effect of train passbys are very important to possess and to develop. This paper presents a new numerical prediction method based on the Rayleigh radiation integral w...

Railway wireless communication has become an indispensable part to provide the reliability and safety of the railway operation as well as the improved railway services. In addition, advanced mobile communication technologies have triggered new railway customer services. Thanks to many benefits of the 4-generation mobile communication technology, long-term evolution (LTE), this technology is one...

The main design criteria of ballasted railway tracks include rail deflections, rail bending stresses, rail wheel contact stresses, sleeper bending moments and ballast sleeper contact pressures. Numerous criteria have been defined for the design of ballasted railway tracks owing to the various mechanical properties of track components and their complex interaction. Therefore, railway track desig...

The significant function of GIS technology in promoting the railway development in this information era is now attracting great attention from the Ministry of Railway and the State decision-making institutions of the P.R.China. However, until present, the GIS has not been economised on the Chinese Railway. Discussions have been made on the several critical issues in building up the railway GIS....

INTRODUCTION TRANSPORTATION of people is increasing as our society grows and the demand for railway services that can provide high-speed and high-capacity transportation is becoming greater. The number of train rides taken in Japan in 2006 was 22,243 million, more than anywhere else in the world by some margin, making Japan one of the world’s leading railway nations. A major feature of railway ...

in this paper, the main factors in the analysis of the railway concrete sleepers areinvestigated and new recommendations are made in order to improve the accuracy of the currentpractices in analysis of the railway track system. first, a comprehensive literature survey isconducted, then, fem models for a railway track system are developed and used to discuss andevaluate the assumptions commonly ...

At the beginning of 1820s. Marc Seguin and his brothers started negotiations with French government for the construction of a railway line from the Saint-Etienne coal field to the Rhone valley and the city of Lyon. This railway is the first French railway using locomotives. Because there are few papers and publications on the history of this important railway, the writers have studied about the...

in this article, multiple-product pvrp with pickup and delivery that is used widely in goods distribution or other service companies, especially by railways, was introduced. a mathematical formulation was provided for this problem. each product had a set of vehicles which could carry the product and pickup and delivery could simultaneously occur. to solve the problem, two meta-heuristic methods...