  Vortex shedding from a microsphere oscillating in superfluid $^4$He at mK
temperatures is compared with that from a laser beam moving in a Bose-Einstein
condensate (BEC) as observed by other authors. In particular, in either case a
linear dependence of the shedding frequency $f_v$ on $\Delta v = v - v_c$ is
observed, where $v$ is the velocity amplitude of the sphere or the constant
velocity of the laser beam above a critical velocity $v_c$ for the onset of
turbulent flow: $f_v = a \,\Delta v$, where the coefficient $a$ is proportional
to the oscillation frequency $ \omega $above some characteristic frequency
$\omega_k$ and assumes a finite value for steady motion $\omega \rightarrow 0$.
