We propose a method to obtain new exact solutions of spinning p-branes in flat space-times for any p , which manifest themselves as higher dimensional Euler Tops and minimize their energy functional. We provide concrete examples for the case of spherical topology S2, S3 and rotational symmetry ∏ i SO(qi). In the case of toroidal topology T 2, T 3 the rotational symmetry is ∏ i SU(qi) with m tar...

We develop algorithms to construct inner approximations of the cone of positive semidefinite matrices via linear programming and second order cone programming. Starting with an initial linear algebraic approximation suggested recently by Ahmadi and Majumdar, we describe an iterative process through which our approximation is improved at every step. This is done using ideas from column generatio...

We propose a method to obtain new exact solutions of spinning p-branes in flat space-times for any p , which manifest themselves as higher dimensional Euler Tops and minimize their energy functional. We provide concrete examples for the case of spherical topology S2, S3 and rotational symmetry ∏ i SO(qi). In the case of toroidal topology T 2, T 3 the rotational symmetry is ∏ SU(qi) and m target...

metal spinning as a kind of manufacturing process has capability to shape hollow components. in present work shear spinning process is used to formplates into conical shapes. moreover, the aim of this research is to demonstrate the impact of the process parameters (i.e. feeding rate and spindle speed) on wall thickness. this approachwas done by experimental and finite elements method. the resul...

Nearly positive matrices are nonnegative matrices which, when premultiplied by orthogonal matrices as close to the identity as one wishes, become positive. In other words, all columns of a nearly positive matrix are mapped simultaneously to the interior of the nonnegative cone by mutiplication by a sequence of orthogonal matrices converging to the identity. In this paper, nearly positive matric...

Wort boiling is the most energy intensive stage in brewing process. Novel wort systems have been explored to reduce primary consumption and improve quality beer flavor stability. Low thermal stress proposed for boiling, but content of dimethyl sulphide (DMS) may exceed required product threshold. A single spinning cone evaporator (SCE) enhance separation DMS minimise wortboiling. The performanc...

Abstract We develop a “dual-cone” model for millimeter wavelength emission near spinning black hole. The consists of optically thin, luminous cones emission, centered on the spin axis, which are meant to represent jet walls. resulting image is dominated by thin ring. first consider effect hole’s and show that dominant displace ring perpendicular projection axis sky <?CDATA $2{a}_{* }\sin i+{ \m...