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In the late 1980s , CPSC conducted an extensive study of submersion incidents involving children under age 5 in residential swimming pools in eight counties in California , Arizona , and Florida . One study at the NBS Tennessee cooperative research unit involves experiments on how best to feed and raise juvenile mussels in tanks for eventual placement into native habitat . Circumstantial evidence is sufficient to prove that a transaction involved proceeds of a SUA , e.g ., evidence that a defendant trafficks drugs , has large amounts of currency , and has no or little legitimate income is sufficient . They should aim to adopt recognised procedures for involving fees in the selection of consultants in order to be seen as best practice procurers . The HCI discipline involves researchers from psychology , computer science , sociology , the design disciplines , art , science , and others .