Background: Delivery by cesarean is a common operative procedure experienced by reproductive age women. Factors which increase risk include older maternal age, obesity, parity and poor vitamin D use along with a more recently defined factor maternal nutrition. Recent research has found low circulating 25-hydroxyvitamin D (25(OH)D), the primary indicator of vitamin D status, among women who were...

We derive the oscillatory exact solutions to Navier–Stokes equations that describe z-invariant viscous fluid flows in a general cylindrical pipe C=D×ℝ1 with section D having an arbitrary geometry and piece-wise smooth boundary ∂D. Exact are presented satisfy no-slip condition at pipe's ∂D×ℝ1 have number of oscillations total kinematic momentum vector on any given interval time [T1,T2]. The stab...

-’We present a theory of quadratic time-frequency (TF) energy distributions that satisfy a covariance property and generalized marginal properties. The theory coincides with the characteristic function method of Cohen and Earaniuk in the special case of ‘‘conjugate operators.” 1 I N T R O D U C T I O N A N D O U T L I N E Important c1.asses of quadratic time-frequency representations (QTFRs), s...

-’We present a theory of quadratic time-frequency (TF) energy distributions that satisfy a covariance property and generalized marginal properties. The theory coincides with the characteristic function method of Cohen and Earaniuk in the special case of ‘‘conjugate operators.” 1 I N T R O D U C T I O N A N D O U T L I N E Important c1.asses of quadratic time-frequency representations (QTFRs), s...