BACKGROUND Aortic stenosis (AS) leads to variable stress for the left ventricle (LV) and consequently a broad range of LV remodeling. The aim of this study was to describe blood flow patterns in the ascending aorta of patients with AS and determine their association with remodeling. METHODS AND RESULTS Thirty-seven patients with AS (14 mild, 8 moderate, 15 severe; age, 63±13 years) and 37 hea...

[1] Model simulations by Bunce et al. (2005a) have shown that direct precipitation of electrons in Saturn’s dayside cusp regions is not capable of producing significant FUV aurora. Instead, they suggested the possibility that the FUV bright emissions sometimes observed near noon are associated with reconnection occurring at the dayside magnetopause, possibly pulsed, analogous to flux transfer e...

Theoretical studies usually attribute convections to the developments of instabilities such as the static or symmetric instabilities of the basic flows. However, the following three facts make the validities of these basic theories unconvincing. First, it seems that in most cases the basic flow with balance property cannot exist as the exact solution, so one cannot formulate appropriate problem...

This paper investigates the electroosmotic micromixing of non-Newtonian fluid in a microchannel with wall-mounted obstacles and surface potential heterogeneity on obstacle surface. In numerical simulation, full model consisting Navier–Stokes equations Poisson–Nernst–Plank are solved for field, ion transport, electric power law is used to characterize rheological behavior aqueous solution. The m...

Tropical cyclogenesis is studied in the context of idealized three-dimensional Boussinesq dynamics with perhaps the simplest possible model for bulk cloud physics. With low-altitude input of water vapour on realistic length and time scales, numerical simulations capture the formation of vortical hot towers. From measurements of water vapour, vertical velocity, vertical vorticity and rain, it is...

1 The velocity field in the vicinity of the twin-tails of combat aircraft at high angle of attack exhibits smallamplitude fluctuations which are nearly periodic. Their frequency increases in direct proportion to freestream velocity, and inversely with model size, the relationship holding over a wide range of Reynolds number. The Strouhal number and spectral shape vary with angle of attack and w...

New techniques are developed to improve the velocity flow-field measurement capability within a freesurface boundary layer region on which progressive capillarygravity waves are present. Due to the extremely thin but rather vortical characteristics of the aforementioned boundary layer, conventional particle image velocimetry (PIV) methods fail to estimate velocity (and vorticity) vectors at an ...