General Science
- Parking Distance Control, is a system used in cars to measure the distance between the car and obstacles
- Pulsed DC, the form of wave produced from a half-wave rectifier or a full-wave rectifier
- Pyroclastic density current, a highly energetic ground current of superheated gases containing a high density of suspended pyroclastic fragments resulting from a volcanic explosion
- Plasmacytoid dendritic cell, a type of mammalian cell that functions as a component of the innate immune system
Read more about this topic: PDC
Famous quotes containing the words general and/or science:
“There is a mortifying experience in particular, which does not fail to wreak itself also in the general history; I mean “the foolish face of praise,” the forced smile which we put on in company where we do not feel at ease, in answer to conversation which does not interest us. The muscles, not spontaneously moved but moved, by a low usurping wilfulness, grow tight about the outline of the face, with the most disagreeable sensation.”
—Ralph Waldo Emerson (1803–1882)
“May we not assure ourselves that whatever woman’s thought and study shall embrace will thereby receive a new inspiration, that she will save science from materialism, and art from a gross realism; that the “eternal womanly shall lead upward and onward”?”
—Louisa Parsons Hopkins, U.S. scientist and author. As quoted in The Fair Women, ch. 16, by Jeanne Madeline Weimann (1981)