Abstract We propose a model explaining the origin of transient/episodic jets in black hole X-ray binaries, which they are caused by transitions from collimated, strongly magnetized jet to wide, uncollimated outflow. The change occurs when accretion flow leaves magnetically choked state due an increase rate for weakly varying magnetic flux. formed powerful then detaches its base, and propagates ...

abstract background: transtracheal jet ventilation is an alternative ventilatory approach in airway surgery. the purpose of this study was to compare respiratory efficacy of percutaneous transtracheal with endotracheal, low frequency jet ventilation during microlaryngeal surgery. methods: ninety asa class i-ii patients aged between 16 and 70 years undergoing elective microlaryngeal surgery were...

We investigate the robustness with respect to the introduction of nonconformality of five properties of strongly coupled plasmas that have been calculated in K = 4 supersymmetric Yang-Mills (SYM) theory at nonzero temperature, motivated by the goal of understanding phenomena in relativistic heavy ion collisions. (The five properties are the jet quenching parameter, the velocity dependence of sc...

We investigate the robustness with respect to the introduction of nonconformality of five properties of strongly coupled plasmas that have been calculated in N = 4 supersymmetric Yang-Mills (SYM) theory at nonzero temperature, motivated by the goal of understanding phenomena in relativistic heavy ion collisions. (The five properties are the jet quenching parameter, the velocity dependence of sc...

Biomechanics plays an important role helping Paralympic sprinters to excel, having the aerodynamic drag a significant impact on the athlete's performance. The aim of this study was to assess the aerodynamics in different key-moments of the stroke cycle by Computational Fluid Dynamics. A world-ranked wheelchair sprinter was scanned on the racing wheelchair wearing his competition gear and helmet...

The drag of a heavy quark and the jet quenching parameter are studied in the strongly coupled N = 2∗ plasma using the AdS/CFT correspondence. Both increase in units of the spatial string tension as the theory departs from conformal invariance. The description of heavy quark dynamics using a Langevin equation is also considered. It is found that the difference between the velocity dependent fact...

The persistence of the southern annular mode (SAM) is studied during austral winter (June–September) and summer (December–March) using observations of the three-dimensional vorticity budget. Analysis of the relative vorticity tendency equation shows that convergence of eddy vorticity flux in the upper troposphere, coupled with a secondary circulation, constitutes a positive eddy feedback that a...

Effect of forcing using a modeled zero-net mass-flux (ZNMF) jet on a stalled NACA 4418 airfoil at Rc=40,000 is examined using two-dimensional numerical simulations. The baseline uncontrolled simulations are modeled after the experiments of Zaman & Culley. The simulations indicate that the stalled airfoil is subject to three naturally occurring frequencies corresponding to the shear layer, the s...

We consider a model for dusty gas flow that consists of the compressible Euler equations for the gas coupled to a similar (but pressureless) system of equations for the mass, momentum, and energy of the dust. These sets of equations are coupled via drag terms and heat transfer. A highresolution wave-propagation algorithm is used to solve the equations numerically. The one-dimensional algorithm ...