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.
Materials: Character Traits/Emotions/Motives Reproducible. Characters are the people or animals in a story. The details that tell about their. personalities are called character traits. The traits of a character can be stated or. shown to the reader by the character's actions. When looking at characters, notice details about how they look, feel and act. Identifying and understanding charactersâ traits, emotions, and motives help the. reader understand the characters.