background: several grafting materials have been used for alveolar ridge augmentation. the literature lacks researches to compare cenobone to other grafting materials. the aim of this study was to compare cenobone/cenomembrane complex to bio-oss/bio-gide complex in lateral alveolar bone augmentation in terms of radiographic, histologic, and histomorphometric parameters. materials and methods: i...

Learning turbulence models from observation data is of significant interest in discovering a unified model for broad range practical flow applications. Either the direct Reynolds stress or indirect velocity has been used to improve predictive capacity models. In this work, we propose combining and sparse train neural network-based The backpropagation technique augmentation approach are with dif...

mirizzi’s syndrome is a rare complication of gallstone disease , that gallbladder lumen can lie alongside the common hepatic duct, resulting in inflamation and resultan bile duct stricture . most cases are not indentified preoperatively. variations of the cystic duct and its point of :union: with the common hepatic duct are surgically important . here, we present an unusual case of type i miriz...

Installing a turbine in duct generally increases the flow through rotor. If there is confinement due to limited water depth, presence of lateral boundaries, or adjacent turbines, further enhancement rotor will be achieved. Extensive studies ducted turbines uni-directional have shown that rotor-based power coefficientCpcan exceed Betz-Joukowsky limit (BJL) for bare turbine, whereas exceedance BJ...

This paper discusses issues regarding in-situ methods of obtaining sound power at a point in a heating, ventilating and air-conditioning (HVAC) duct system. Such a method is being used as part of a larger investigation on acoustical prediction methods to allow for comparison of measured data to results from attenuation predictions of individual duct elements, such as elbows or dampers. Sound pr...

the paper numerically presents laminar forced convection of a nanofluid flowing in a duct at microscale. results were compared with both analytical and experimental data and observed good concordance with previous studies available in the literature. influences of brinkman and reynolds number on thermal and hydrodynamic indexes have been investigated. for a given nanofluid, no change in efficie...

Two-sensor method proposed by Fusco et al. ["Two-sensor power measurements in lossy ducts," J. Acoust. Soc. Am. 91, 2229-2235 (1992)] is a novel technique that determines acoustic intensity of a gas column in a wide duct from measurements of pressure based on the boundary layer approximation. For further development of this method, its validity is experimentally tested through comparison with t...

In this paper, a new cooling system using a nacelle duct is proposed for the mechanical room in the household refrigerator. The conventional mechanical room consists of a condenser, a compressor and an axial fan. The axial fan is mainly responsible for cooling the condenser and the compressor. The new cooling system is developed by replacing the axial fan with the nacelle duct including the sma...

The detection and prediction of sea clutter power is the basis inversing atmospheric duct. At present, technology duct within radar range relatively perfect, but long-distance inversion limited by range, echo measured Based on theory weighted Markov model grey model, a constructed, sliding method introduced to establish model. relative error between predicted values above four models calculated...

The oscillatory response of multiple shock waves to upstream disturbances in a supersonic flow is studied numerically constant area rectangular duct. accelerated through nozzle with an exit Mach number 1.75 and continues the duct, where are formed. To investigate effect disturbance on oscillations, three parameters varied systematically: turbulent intensity, frequency pressure fluctuation, ampl...