20160928 10:54 
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20160928 08:02 
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20160928 08:02 
Aging and communication in the twin paradox
/ de Wolf, David A
The twin paradox of the special theory of relativity has given rise to a large body of literature discussing its implications. In its standard form, the traveler changes velocity only at the destination of the trip, so that he appears to perceive an improbably instantaneous and noncontinuous change in age of the stationary twin. [...]
arXiv:1609.08461.
2016  published p.
External link: Preprint

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20160928 08:02 
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20160928 08:01 
The Helmholtz theorem and retarded fields
/ Heras, Ricardo
Textbooks frequently use the Helmholtz theorem to derive expressions for the electrostatic and magnetostatic fields but they do not usually apply this theorem to derive expressions for the timedependent electric and magnetic fields, even when there is no formal objection to doing so because the proof of the theorem does not involve time derivatives but only spatial derivatives. Here we address the question as to whether the Helmholtz theorem is useful to derive expressions for the fields of Maxwell's equations. [...]
arXiv:1609.08149.
2016
 Published in : Eur. J. Phys. 37 (2016) 065204
External link: Preprint

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20160928 08:01 
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20160928 08:01 
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20160928 08:01 
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20160928 08:01 
Inflow process of pedestrians to a confined space
/ Ezaki, Takahiro ; Ohtsuka, Kazumichi ; Chraibi, Mohcine ; Boltes, Maik ; Yanagisawa, Daichi ; Seyfried, Armin ; Schadschneider, Andreas ; Nishinari, Katsuhiro
To better design safe and comfortable urban spaces, understanding the nature of human crowd movement is important. However, precise interactions among pedestrians are difficult to measure in the presence of their complex decisionmaking processes and many related factors. [...]
arXiv:1609.07884.
2016  23 p.
 Published in : Collective Dynamics 1 (2016) A4
External link: Preprint

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20160928 08:01 
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