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.
The workshop of character is everyday life. The uneventful and commonplace hour is where the battle is lost or won.Maltbie Davenport Babcock, A character standard is far more important than even a gold standard. The success of all economic systems is still dependent upon both righteous leaders and righteous people.