(FACs) and suppressedE- andF-region electron densities. The width of the region of the enhanced electric field is one to four times the width of the arc. In some cases, the electron density reduction is so pronounced that the region can be described as an auroral ionospheric density cavity...
A dental trait in humans can be a valuable diagnostic tool in anthropological studies for classifying and characterizing different ethnic groups. Many studies have attempted to relate the prevalence of dental morphologies with different factors. Several variations, such as variations in the size, number...
To avoid these complications, one could make the neo-leaflets as small as sufficiently possible for normal aortic valve function without regurgitation. A number of criteria of normal function in the native aortic valve or after its reconstruction were described [21,22,23,24,25]: central coap...