BackgroundThe recurrence of pleomorphic adenoma (PA) has been extensively debated, mostly in relation to the extent Wireless Mouse of parotidectomy.MethodsA systematic review was undertaken to clarify the surgical and pathological variables related to PA recurrence.Inclusion criteria were as follows: English literature, and prospective or retrospec
Migrating eastern North American monarch butterflies use a time-compensated sun compass to adjust their flight to the southwest direction.Although the antennal genetic circadian clock and the azimuth of the sun are instrumental for proper function of the compass, it is unclear how these signals are represented on a neuronal level and how they are i
In view of the real-time control problem caused by the strong coupling of input/output of the parallel mechanism, a three translation parallel mechanism with zero coupling degree is proposed according to the topological design theory and method of parallel mechanism of orientation feature position and orientation characteristic(POC) equation.The me