Microelectrode arrays (MEAs) offer a powerful tool to both record activity and deliver electrical microstimulations to neural networks either in vitro or in vivo. Microelectronics microfabrication technologies now allow building high-density MEAs containing several hundreds of microelectrodes. However, dense arrays of 3D micro-needle electrodes, providing… (More)
The author shows in this article that a coherent description of the Sagnac effect for massive particles, which takes account of length contraction and time dilation can only be obtained with a so called " absolute " clock synchronization parameter. Any other synchronization leads to an incoherent description between the point of view of an observer on the… (More)
The transmission time of an electromagnetic signal in the vicinity of the earth is calculated to c −2 and contains an orbital Sagnac term. On earth, the synchronisation of T CB can be realised by atomic clocks, but not the one of T CG. The principle of equivalence is discussed.