The Spinning Ring

Geometry of the doubly spinning Black Ring

We provide a detailed analysis of the doubly spinning black ring, investigating both its general properties and its shape. We also examine the geometry of the ergosurface, illustrating the process of self-merging and discussing the physics of ergoregions. ar X iv :0 90 2. 46 41 v1 [ gr -q c] 2 6 Fe b 20 09

A Charged Doubly Spinning Black Ring

This paper calculates the general form of a 5d metric when fundamental string and momentum charges are added. This is accomplished using the standard method of boosting and T-dualising a solution to Einstein’s equations, where the solution has three Killing vectors and is expressed in a generic form. The thermodynamical properties of the charged solution are derived and the physical implication...

Production of Core Spun Yarn with Ring & Siro Spinning System

A common problem in production of core–spun yarns on the Ring spinning frame is the slippage of the staple fibers as sheath fibers relative to the core. This effect is known as ‘strip-back’ or barberpole. This problem may lead to an incomplete core coverage and results in end–breaks in subsequent processing. In order to avoid this problem, in the present work, core spun yarns (acrylic sheath fi...

Distribution of Power Requirements during Yarn Winding in Ring Spinning

Spinning ring wormholes: a classical model for elementary particles?

Static horizonless solutions to the Einstein–Maxwell field equations, with only a circular cosmic string singularity, are extended to exact rotating asymptotically flat solutions. The possible interpretation of these field configurations as spinning elementary particles or as macroscopic rotating cosmic rings is discussed. Talk presented at the 4 Alexander Friedmann International Seminar on Gra...