The railway industry has focused on the improvement of maintenance through use novel technologies. Recently, utilisation repair welding to restore worn area wheels been investigated, as it can bring significant savings in wheelset maintenance. Under an Innovate UK AURORA project, a wheel that previously operated London Underground (LUL) was restored using this process. To test its performance a...

A three-dimensional vehicle-axle box bearing coupling model is established. The can calculate the contact force in three directions and obtain dynamic response of axle under real vehicle running environment. load distribution on double row tapered roller analyzed, co-simulation conducted by comprehensively considering transmission between bearing. Taking into account great impact defects bearin...

Ground vibrations near railway lines are generated by the forces that acting between wheel and rail. It seems to be a straight forward assumption vehicle dynamics important for level frequencies of excitation forces. Different phenomena analysed their role in ground vibrations: rigid body modes bogies, elastic (bending) car body, wheelset. The theoretical analyses use models, simplified detaile...

in order to investigate the microbiological safety of sanitary tissues made of recycled scrap papers in iran, random samples were taken for one year with the cooperation of the iranian standard and industrial research institute (karaj unit), of 44 types of sanitary tissues, two samples of each type including tissues, toilet papers and dippers as well as a control sample and their probable conta...

in this  cross sectional s tudy carried out in s pring and s ummer, 79 farmers  working  in different  job  pos itions including agriculture, hus bandry and horticulture in north of iran were participa ted. evaluation of the heat s tres s was conducted us ing wet bulb glob temperature (wbgt) index according iso7243 and heat s train evaluation us ing  meas uring  the  individual  phys iological ...

exposure to toluene can be associate with genotoxicity, neurological dysfunction, reproductive toxicity, and etc. biomonitoring of hippuric acid (ha) is used for a long time as an occupational exposure index to toluene. the aim of this study was to explore efficiency of ha as a biomarker of exposure to low level of toluene for iranian petroleum depot workers in 2011. personal monitoring to tolu...