The convective stability of a two-layered system consisting heat-generating porous region underlying an air has been numerically studied. linear dependence the heat release on solid volume fraction is taken into account in region. equal constant temperature values are fixed external impermeable boundaries system. critical internal Rayleigh-Darcy number at which convection induced form two-dimen...

It is shown how well-chosen perforations in a wall flow can locally reduce skin friction drag by modifying the generation of bursts boundary layer. For this purpose, detailed hot wire layer experimental investigation past perforated plate, complemented with large eddy simulations, carried out and compared to smooth case. The plate obtained an array flush-mounted circular cavities. These cavitie...

In the canine proximal colon, tissue near the submucosal surface of the circular muscle layer produces spontaneous mechanical contractions, synchronized with electrical slow waves. Comparative physiological examination of tissue strips from various regions of the submucosa and circular muscle coat revealed that the characteristic smooth muscle tissue of the innermost sublayer of the circular mu...

PURPOSE To determine the impact of flap creation methods for sub-Bowman's keratomileusis (SBK) on central Bowman's layer thickness. METHODS SBK flaps were made by Moria microkeratome for 20 subjects and by femtosecond (FEMTO) laser for 21 subjects. Corneal sublayer thicknesses were measured by ultra-high resolution optical coherence tomography before SBK and at 1 day, 1 week, 2 weeks, and 1 m...

The performance of Wireless Local Area Network (WLAN) is highly dependent on the processes that are implemented in Medium Access Control (MAC) sublayer regulated by IEEE 802.11 standard. In turn, various parameters affect MAC sublayer, most important which number stations network and offered load. With massive growth multimedia traffic, research depending traffic types relevant. this paper, we ...

Intrinsically photosensitive retinal ganglion cells (ipRGCs) respond to light and play roles in non-image forming vision, such as circadian rhythms, pupil responses, and sleep regulation, or image forming vision, such as processing visual information and directing eye movements in response to visual clues. The purpose of the present study was to identify the distribution, types, and proportion ...

The effects of synthesis time and the number layers were investigated on Na-X zeolite sublayer for fabricating a PEBA/Na-X hybrid membrane. CO2/N2 separation was considered as objective function to obtain an effective sublayer. SEM AFM studies synthesized sublayers reveal that 6 hour one layer give (ZSL6-1) with sub-micron thickness (< 1µm), roughness 13 nm. N2 permeation (11900 GPU) shows low ...

The mechanics of inhomogeneous turbulence in and adjacent to interfacial layers bounding turbulent and non-turbulent regions are analysed. Different mechanisms are identified according to the straining by the turbulent eddies in relation to the strength of the mean shear adjacent to, or across, the interfacial layer. How the turbulence is initiated and the topology of the region of turbulence a...

The channel flow subjected to a wind stress at the free surface and an oscillating pressure gradient is investigated using large-eddy simulations. The orientation of the surface stress is parallel with the oscillating pressure gradient and a purely pulsating mean flow develops. The Reynolds number is typically Re!=10 and the Keulegan–Carpenter number—the ratio between the oscillation period and...