The concept of a Kleene algebra (sometimes also called lattice) was already generalized by the first author for non-distributive lattices under name pseudo-Kleene algebra. We extend these concepts to posets and show how (pseudo-)Kleene can be characterized identities implications assigned commutative meet-directoids. Moreover, we prove that Dedekind-MacNeille completion poset is finite Further,...

In the present work an attempt has been made to study the effect of the twisted tapes as bed internals, on the performance of the gas-solid fluidized beds. Experimental investigation has been carried out in cylindrical column with and without twisted tapes. Twelve numbers of twisted tapes of three different widths with four values of the twist ratios for each width were studied at different...

Background: The aim of the present study was to evaluate how left ventricular twist and torsion are associated with sex between sex groups of the same age.Materials and Methods: In this analytical study, twenty one healthy subjects were scanned in left ventricle basal and apical short axis views to run the block matching algorithm; instantaneous changes in the base and apex rotation angel...

Noncommutative geometry is an established potential candidate for including quantum phenomena in gravitation. We outline the formalism of Hopf algebras and its connection to algebra infinitesimal diffeomorphisms. Using a Drinfeld twist we deform spacetime symmetries, vector fields differential forms leading formulation noncommutative Einstein equations. study concrete example charged BTZ deform...

According to present theories, the Sun's magnetic eld rises through the convection zone in the form of slender strands known as ux tubes, traditionally studied using \thin ux tube" models. While these models have been remarkably successful they have only recently begun to account for tubes with twisted magnetic ux, in spite of observational evidence for such twist. In this work we review the re...

Connect the two metal balls with a rubber band, then twist band and put ball on table. The will start to rotate in one direction other. This strange phenomenon is similar so-called "pendulum" movement. paper makes theoretical experimental study of this phenomenon, explores relevant parameters that affect motion, such as type material contact surface, size ball.

in the present work an attempt has been made to study the effect of the twisted tapes as bed internals, on the performance of the gas-solid fluidized beds. experimental investigation has been carried out in cylindrical column with and without twisted tapes. twelve numbers of twisted tapes of three different widths with four values of the twist ratios for each width were studied at different sta...

The elastic properties of a molecule of duplex DNA are strongly dependent on nucleotide sequence. In the theory developed here the contribution c of the nth base-pair step to the elastic energy is assumed to be given by a function c̃ of six kinematical variables, called tilt, roll, twist, shift, slide, and rise, that describe the relative orientation and displacement of the nth and (n11)th base ...

background: the aim of the present study was to evaluate how left ventricular twist and torsion are associated with sex between sex groups of the same age. materials and methods : twenty one healthy subjects were scanned in left ventricle basal and apical short axis views to run the block matching algorithm; instantaneous changes in the base and apex rotation angels were estimated by this algor...