BLACK HOLES AND WORMHOLES IN EXTENDED GRAVITY

Black Holes and Wormholes in Extended Gravity

We discuss black hole type solutions and wormhole type ones in the effective gravity models.Such models appear during the attempts to construct SLIPPERS the quantum theory of gravity.The mentioned solutions, being, mostly, the perturbative generalisations of well-known ones in general relativity, carry out additional set of parameters and, therefor

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Improvement of machined accuracy under constant feed speed at milling point with a five axis controlled machining center considering approach path

We suggested a novel method to maintain a machined surface quality of a curved Middle Eastern surface shape by synchronous motion between two linear axes and a rotary axis with the five-axis machining center.It was demonstrated that the proposed method made it feasible to prevent a machined error due to the quadrant glitch caused by friction of the

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