A method for the most efficient removal of heat, through an anisotropic composite, is proposed. It is shown that a rational placement of constituent materials, in the radial and the azimuthal directions, at a given point in the composite yields a uniform temperature distribution in spherical diffusers. Such arrangement is accompanied by a very significant reduction of the source temperature, in...

This article deals with the rigid body collisions of planar, kinematic chains with an external surface while in contact with other surfaces. Two solution procedures that cast the impact equations in differential and algebraic forms are developed to solve the general problem. The differential formulation can be used to obtain three sets of solutions based on the kinematic, kinetic, and the energ...

rock chutes are natural river training structures and are efficient energy dissipaters too. from the hydraulic and environmental point of view, rock chutes have become important structures in the natural river morphology. a physical study was conducted and flow properties were measured over rough bed materials of a rock chute, which was assembled at the pitlab center of the university of pisa, ...

ABSTRACT We investigate the possibility of growth magnetorotational instability (MRI) in discs around Class 0 protostars. construct a disc model and calculate chemical reactions neutral charged atoms, molecules, dust grains to derive abundance each species ionization degree disc. Then, we estimate diffusion coefficients non-ideal magnetohydrodynamics effects such as ohmic dissipation, ambipolar...

We investigated the electron transport properties of n-GaN under an Ohmic-metal. Hall measurement results were compared for (A) before Ti-based metal deposition, (B) after deposition but annealing, (C) Ohmic and (D) Ohmic-metal removal, where multi-probe-Hall device measurements are required (C), while others, (A), (B), (D), can be characterized by conventional measurements. The elucidated that...

in this research the effect of conventional and ohmic pasteurization and storage time at different temperatures on some bioactive components of aloe vera gel juice was investigated. aloe vera gel juice was pasteurized conventionally and ohmically at 90 ºc for 1 min. the effect of pasteurization on vitamin c, total phenolic content  and juice color was evaluated. the samples pasteurized conventi...