This study evaluated the influence of irrigation tip, root canal curvature and final apical diameter on periapical debris and irrigant extrusion during root canal instrumentation. After being classified as mildly or moderately curved, the mesiobuccal root canals of 90 human molars were instrumented. The teeth were allocated into three groups according to the used needle type: a flat open-end ne...

In this paper, numerical study of forced convection heat transfer in a square cavity with inlet and outlet slots and hot obstacle with and without porous medium was investigated. The walls of cavity in addition of inlet and outlet ports are thermally insulated and the obstacle is maintained at constant temperature. A lattice Boltzmann model for incompressible flow in porous media and Brinkman F...

This review is about non-Newtonian nanofluid applications for convection in cavities under a magnetic field. Convection an important topic thermal energy system, and diverse exist processes such as drying, chemical processing, electronic cooling, air conditioning, removal of contaminates, power generation many others. Some problems occur symmetrical phenomena, while they can be applicable to ap...

The low-frequency performance of a vented-box loudspeaker system is directly related ta a small number of easily measured system parameters. This system is a fourtharder (24-dB per octave cutoff) high-pass filter which can be adjusted ta have a wide variety of response characteristics. Enclosure lasses have a significant effect on system performance and should be taken into account when assessi...

in this work a numerical study of thermal and fluid dynamics behavior of natural air convection in a square cavity in a laminar flow is presented, by finite volume method. the square cavity has two walls heated with different temperatures and two isolated walls. the numerical simulation is made up of several rayleigh numbers to . flow and isotherm lines are presented and analyzed. the numerical...

Invasive alien species are a major cause of biodiversity loss globally, but especially on islands where high species richness and levels of endemism accentuate their impacts. The Red vented bulbul (Pycnonotus cafer), a tropical passerine bird that has been introduced widely across locations of high conservation value, is considered an extreme pest. It is currently expanding its range in New Cal...