Porpoise (scuba gear) Porpoises still exist. Only a few of these early models are known today, the rarest being the CA-2, made for use with two tanks. Porpoise (scuba gear) Porpoise is a tradename for scuba developed by Ted Eldred in Australia and made there from the late 1940s onwards. The first Porpoise was a closed circuit oxygen rebreather, and the following models were all single hose open circuit regulators. This rebreather was developed by Ted Eldred in the late 1940s and early 1950s. Some were made and used for sport diving, but they did not go into full production. It was worn
20th-century French philosophy linguistics in the 20th century. He is widely considered the 'father' of 20th-century linguistics. This current was further explored by Claude-Levi Strauss in ethnology. His work influenced important figures like Jacques Derrida and Jacques Lacan significantly. From 1963, a magazine was run in Paris, called Tel Quel, which also dabbled excessively in structuralist analysis of texts. Important figures in this endeavour were Phillip Sollers, the magazine's editor, Julia Kristeva and Roland Barthes. Jacques Lacan (1901–1981) was specifically interested in the philosophy of psychoanalysis. He could be said to be relevant to the more modern foundations of discursive psychology. Post-structuralism is,