Fan (machine) the airflow from the fans. Thus, fans may become ineffective at cooling the body if the surrounding air is near body temperature and contains high humidity. The punkah fan was used in India about 500 BCE. It was a handheld fan made from bamboo strips or other plant fibre, that could be rotated or fanned to move air. During British rule, the word came to be used by Anglo-Indians to mean a large swinging flat fan, fixed to the ceiling, and pulled by a servant, called the punkawallah. For purposes of air conditioning, the Han Dynasty craftsman and engineer Ding
Spectrum of a C*-algebra representations of separable type I C*-algebras and correspondingly of separable locally compact groups of type I. Since a C*-algebra "A" is a ring, we can also consider the set of primitive ideals of "A", where "A" is regarded algebraically. For a ring an ideal is primitive if and only if it is the annihilator of a simple module. It turns out that for a C*-algebra "A", an ideal is algebraically primitive if and only if it is primitive in the sense defined above. This is the Corollary of Theorem 2.9.5 of the Dixmier reference. If "G" is a locally compact