Slotted shell resilient elements for drilling shock absorbers

The new design of a resilient element for application in drilling devices of vibration protection is presented.A cylindrical shell with a cut along its generatrix is the peculiarity of Asian the proposed design.The presented resilient element has high loaded and damping properties upon cross dimension hard restriction condition.Besides, the design

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A quasistatic magnetic cloak

Cloaking a three-dimensional object in free space from Asian electromagnetic waves has recently become a theoretical possibility, although practical implementations can only be made in reduced schemes.If static fields are involved, requirements are less restrictive and some practical realizations have been possible.Here we present a third regime be

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