An elevated D-dimer level is not normal. It is usually found after a clot has formed and is in the process of breaking down. If you are having significant formation and breakdown of blood clot in your body, your D-dimer may be elevated. A negative D-dimer test means that a blood clot is highly unlikely.
Purpose [edit]. Counting impressions is the method by which most Web advertising is accounted and paid for, and the cost is quoted in CPI (cost per impression) .
Impression management is usually used synonymously with self-presentation, in which a person tries to influence the perception of their image. The notion of impression management was first applied in face-to-face communication, but then was applied to computer-mediated communication.