نتایج جستجو برای: railroad tunnel

تعداد نتایج: 37938  

Journal: :Work 2012
Robert O Andres Chip Wade

This is a review of walking tasks in the railroad environment, and the injuries that result from slips, trips, falls, or other acute or even non-traumatic exposures. The lack of federal regulations for railroad walkways has led several states to develop and enforce their own regulations. Support from the research literature for such regulations has come from biomechanical studies of the effects...

Journal: :Remote Sensing 2015
Mostafa Arastounia

This study is aimed at developing automated methods to recognize railroad infrastructure from 3D LIDAR data. Railroad infrastructure includes rail tracks, contact cables, catenary cables, return current cables, masts, and cantilevers. The LIDAR dataset used in this study is acquired by placing an Optech Lynx mobile mapping system on a railcar, operating at 125 km/h. The acquired dataset covers ...

Journal: :Applied sciences 2023

Tunnels may suffer severe damage when passing through an active fault in high-intensity earthquake zones. The present study aims to investigate the performance of isolation layer composed a rubber-sand mixture, emerging trend low-cost seismic mitigation studies. Based on Ngong tunnel Nairobi-Malaba Railroad Kenya, Africa, effect acceleration and strain lining was investigated shaking table test...

2015
Christopher Cotter

This paper investigates the relationship between railroad bond defaults and nancial outcomes in the National Banking System during the Panic of 1873. Contemporary accounts and anecdotal evidence indicate the importance of a boom and bust in the railroad industry to the onset of the panic. I use comprehensive balance sheet data for national banks before and after the panic, along with detailed G...

2010
Akira AIKAWA

The seismic failure behavior of railroad ballasts in response to earthquakes was analyzed using Discontinuous Deformation Analysis.Several sinusoidal waves with different frequencies and accelerations were inputted into the discontinuous numerical model of a railroad ballast ,which consists of an assemblage of polygonal crushed stones,rails,sleepers and a roadbed .The dependencies of railroad f...

Journal: :The journal of the American Academy of Psychiatry and the Law 2006
Kenneth J Weiss J Michael Farrell

Railroad and subway drivers can experience psychological trauma when trains strike or nearly miss other trains, motor vehicles, or persons or become instruments of death. Derailments, collisions, and suicides on the tracks can induce feelings of helplessness, horror, guilt, and anxiety in the drivers. Although some drivers experience acute stress disorder (ASD) or post-traumatic stress disorder...

Journal: :International Journal of Current Science Research and Review 2021

Indian railway is one of the largest networks in country. Its motto “the life line country”, and main transport completed by railways Railroad cheapest safest means transport, but there are also certain accidents on railroad. 60% caused road failures or formation cracks road. Today’s rail systems involve manual track inspection, which cumbersome not entirely effective. However, detection correc...

2006
S Kenderian B B Djordjevic

In recent years, remote non-contact NDE techniques have been sought in an effort to improve railroad related inspection operations. More specifically, efforts have been aimed at increasing the inspection coverage and performing dynamic inspections for railroad tracks and wheels. Throughout most of the 20th century, dynamic inspections of railroad tracks have been developed and performed, howeve...

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