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
Type A (artist collective) Cantz published a monograph featuring this collaboration with the IMA in September 2009. From 2009 to 2011 Type A embarked on two projects exploring fear, safety and authority: "Barrier" (2009) and "Trigger" (2011). "Barrier" is a large scale concrete sculpture installation recreating Jersey highway barriers and "Trigger" explores America’s obsession with guns. For "Trigger," Type A created a series of photographs which are printed and sold as shooting targets by Law Enforcement Targets Inc. With this project they practice what they call "Interpropriation" or “the act of interjecting themselves and actively participating in cultures outside the art world.” In 2012