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Reliability and validity of a brief assessment tool measuring children’s energetic play in early childhood education and care

Adams EK, Christian H, Trost SG.
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Effect of Ambient Temperature on Current Collection Quality in Pantograph–Catenary Interaction

International Journal of Structural Stability and Dynamics, 2023
This paper investigates the effect of the ambient temperature change on the dynamic interaction between pantograph and catenary (PAC). Thermal expansion/contraction of the components of the overhead contact system (OCS) is considered. Simulation results show that the thermal stress has a much greater influence on the longitudinal positioning of the ...
Yongming Yao, Pu Huang, Ning Zhou, Zhipeng Yang, Wenxuan Zhang   +4 more
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Effect of Vehicle Speed on Contact Pressure and Current Collecting Quality

Applied Mechanics and Materials, 2014
In the subway movement the stability of current collection is extremely important. Using experiment system of the pantograph current collection to simulate the vehicle running in different speed can be used to analyze the condition of contact pressure, the current collection quality, the disconnection frequency under varies speed conditions and bring ...
Jie Chen Xu, Xiao Bo Li
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Influence of Dropper Spacing on Quality of Pantograph-Catenary Current Collection

Applied Mechanics and Materials, 2014
Elasticity variations in railway overhead contact line would lead to the fluctuation of contact force between pantograph and contact wire and produce a negative effect on the stability of current collection. Dropper distribution is one of the key factors affecting the elasticity of the contact wire.
Mei Li Yu, Wen Zheng Liu, Jian Zhang, Cai Ying Yan   +3 more
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Phototube sensor for monitoring the quality of current collection on overhead electrified railways

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2001
A new measurement system able to detect the occurrence of arcing between the pantograph and the overhead contact line was studied and set up. The system uses photomultiplier tubes to measure the duration of the ultraviolet emission due to electric arcing. The major advantages of the system proposed are its non-invasivity with respect to the pantograph
Bruno O, LANDI, ALBERTO, Papi M, SANI, LUCA   +3 more
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Analysis of electrical interferences related to the current collection quality in pantograph–catenary interaction

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2011
The dynamic interaction between a pantograph and a catenary influences the quality of the current collection; in particular, when two pantographs are used to collect current, the second pantograph is subjected to the disturbances originated on the overhead line by the transit of the first pantograph, generally causing a deterioration of current ...
BUCCA, GIUSEPPE, COLLINA, ANDREA, MANIGRASSO, RENATO, MAPELLI, FERDINANDO LUIGI, TARSITANO, DAVIDE   +4 more
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Analysis of the Current Collection Quality of the Variable Speed Zone of the Pantograph-Catenary System

2020
There are many variable speed zone during train operation. Meanwhile, the curved zone also is an important zone when the train passing by and the train will slow down. However, rarely research on quality of the current collection in variable speed zone.
Jiangyang Qiu, Guiming Mei, Weihua Zhang, Jiangwen Wang, Mengying Tan, Zhong Huang, Wei Qiao   +6 more
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