Transcranial Doppler (TCD), first described in 1982 [1], is a noninvasive ultrasound (US) study that involves the use of a low-frequency (â¤2 MHz) transducer probe to insonate the basal cerebral arteries through relatively thin bone windows.
Details. as.character and is.character are generic: you can write methods to handle specific classes of objects, see InternalMethods. Further, for as.character the default method calls as.vector, so dispatch is first on methods for as.character and then for methods for as.vector.
Method acting is an approach in which the actor identifies with the portrayed character by recalling emotions or reactions from his or her own life.he first occurrence of the term actress was in 1700 according to the OED and is ascribed to Dryden. In Japan, onnagata, men taking on female roles, were used in kabuki theatre when women were banned from performing on stage during the Edo period.