The microstructure was observed to lengthen along the semimajor axis [r.sub.3], semimajor axis [r.sub.1], and semiminor axis [r.sub.2].
The samples with the deformed microstructures were examined using TEM to obtain values of semiminor axis radius, semimajor axis radius, and major axis radius.
We defined waist circumference as the circumference of the ellipse, and the US-measured distance as the semiminor axis
. The VFA was taken by subtracting the back side one-third area occupied by bone and muscles from the peritoneal cavity ellipse.
The semimajor axis of each ellipse is in the range of (10,150), the ratio of the semimajor axis and semiminor axis
is not greater than 4, and the tangential angle is in the range of [0, [pi]).
If [b.sub.1] is the semiminor axis
of the ellipse, then point P([??]) on the ellipse which is the closest to the center of the ellipse is given by