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.
Character: Character is revealed by what the author says about him/her (direct characterization; his/her thoughts/speech; his/her actions; what other characters say about hi â¦ m/her (indirect characterization). A character can be static (remain the same) or dynamic (change as a result of the events of the story.So, the four elements of characterization are: Through what the author says about him/her Through his/her speech/thoughts Through his/her actions Through what other characters say about him/her.16 people found this useful. DeacAAA175A.543 Contributions. character can be static (remain the same) or dynamic (change as a result of the events of the story. So, the four elements of characterization are: Through what the author says about him/her Through his/her speech/thoughts Through his/her actions Through what other characters say about him/her.