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A satellite moving around the Earth is perturbed by the gravitational force of the Moon. So its orbit may not be stable. In this work, the author uses numerical method to calculate the motion of the satellite. It is assumed that the satellite is so small that it does not influence the Earth and the Moon, but itself is influenced by the Earth and the Moon. It is found that the stability of the orbit of the satellite changes as a function of the satellites distance to the Earth (or to the Moon). In three ranges of distance (which correspond to 2/1 resonance, 3/1 resonance, and 4/1 resonance...

Traversable wormholes have become a subject of intensive studies since 1988 when Morris and Thorne published their paper which put forward the energy conditions for traversable wormholes. A number of researchers have calculated the stress-energy tensors of different fields but failed to find one that meets the requirement of the wormhole geometry. Some others find different schemes to sustain traversable wormholes but either on the Planck scale or hypothetically on a macroscopic scale. Groves has developed a method to compute the renormalized stress-energy tensor for a quantized massive spin...

This book provides a comprehensive overview of the recent development of flexible electronics. This is a fast evolving research field and tremendous progress has been made in the past decade. In this book, new material development and novel flexible device, circuit design, fabrication and characterizations will be introduced. Particularly, recent progress of nanomaterials, including carbon nanotubes, graphene, semiconductor nanowires, nanofibers, for flexible electronic applications, assembly of nanomaterials for large scale device and circuitry, flexible energy devices, such as solar cells...