نتایج جستجو برای: concrete sleeper

تعداد نتایج: 76768  

2009
Magnus Johansson Harko Verhagen

The latest advancements in computer games offer a domain of human and artificial agent behaviour well suited for analysis and development based on normative multi agent systems research. One of the most influential gaming trends today, Massively Multi Online Role Playing Games (MMORPG), poses new questions about the interaction between the players in the game. If we model the players and groups...

Journal: :Journal of Vibroengineering 2022

The unintended vibrations and sound emerging from train operation have an enormous impact on the surroundings, including deterioration of way, buildings, structures. One proposed strategy to mitigate this issue is installation a rail pad inserted between steel concrete sleeper provide flexibility track cushion shocks generated by wheels’ movement. These materials nonlinear, dissipative properti...

Journal: :Journal of Human Environmental Studies 2008

Journal: :Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine 2014
Katharina Seystahl Helen Könnecke Oguzkan Sürücü Christian R Baumann Rositsa Poryazova

A naturally short sleeper phenotype with a sleep need of less than 6 hours without negative impact on health or performance is rare. We present a case of an acquired short sleeper phenotype after third ventriculostomy. A 59-year-old patient suffering from chronic hydrocephalus reported an average of 7-8 h of nocturnal sleep. After surgical intervention, the patient noted a strikingly reduced sl...

Journal: :civil engineering infrastructures journal 0
javad sadeghi centre of excellence in railway transportation, school of railway engineering, iran university of science and technology, tehran, iran araz hasheminezhad research assistant, school of railway engineering, iran university of science and technology, tehran, iran mohammad essmayil kaboli m.sc. student, school of railway engineering, iran university of science and technology, tehran, iran

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...

2011
Hang-Jun Wang Hung-Du Lin Li-Yan Zhang Shao-Xiong Ding

Twenty microsatellite markers were isolated and characterized from the Chinese black sleeper, Bostrychus sinensis. Loci were screened in 30 individuals from Taiwan. For each locus, the number of alleles varied from 4 to 22 with mean expected and observed heterozygosity of 0.79 and 0.66, respectively. One locus significantly deviated from Hardy-Weinberg equilibrium after Bonferroni correction an...

Journal: :BioTechniques 2008

Journal: :Han-gukbangjaehakoenonmunjip 2023

Lattice-type bi-block reinforced concrete (RC) sleepers have been widely used for cast-in-place slab tracks. However, the standards manufacturing, inspection, and performance verification of lattice-type RC are not well established, even when such a sleeper is critical component track. Therefore, it necessary to develop new standard sleepers. In this study, requirements relevant were investigat...

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