نتایج جستجو برای: steel sleepers
تعداد نتایج: 82232 فیلتر نتایج به سال:
Sleeper spacing has been a taboo subject throughout the railway’s history. Safety concerns related to structural integrity have main causes of not addressing this matter. There are no specific and clear recommendations or guidelines in relation matter distances do go more than 0.8 m. In order beyond current situation, following research paper analyses influence between sleepers on behaviour bal...
The small watershed approach is well-suited but underutilized in mercury research. We applied the small watershed approach to investigate total mercury (THg) and methylmercury (MeHg) dynamics in streamwater at the five diverse forested headwater catchments of the US Geological Survey Water, Energy, and Biogeochemical Budgets (WEBB) program. At all sites, baseflow THg was generally less than 1ng...
Research is devoted to the development of ideas about mechanism flow corrosion currents through structures railway tracks and buildings justification methods their protection against electrical corrosion. As a result theoretical studies field tests, electric circuits leakage from pulsating unidirectional potential POEP, which arise during passage rolling stock along electrified direct current t...
Objectives: (i) To expose ‘normal sleepers’ to a thirty two hour sleep deprivation protocol and evaluate the impact of this deprivation on a complex performance task i.e. The Paced Auditory Serial Addition Test (PASAT), (ii) To compare these sleep deprivation performance findings with historical data on the impact of sleepiness secondary to narcolepsy on PASAT performance measures, (iii) To inv...
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