Ukulele Festival Hawaii. This annual Waikiki festival honors Hawaii's beloved musical instrument. Photo: Tina Mahina. Photo: Tina Mahina. The ukulele is Hawaiiâs best-loved musical instrument, so it makes sense that Ukulele Festival Hawaii is the worldâs largest, attracting enthusiasts from as far away as Italy and Thailand.
atrioventricular (AV) valve, a valve in the heart through which blood flows from the atria to the ventricles. The valve between the left atrium and left ventricle is the mitral (bicuspid) valve; the right AV valve is the tricuspid valve. 1  Facebook. 2  Twitter.
The valve is a simple variable-geometry device that controls the opening and closing of the specified flow window or valve curtain area as determined by the camshaft and rocker ratio. The valve curtain area is defined as the flow window created by the open valve at maximum valve lift.