Studies on air infiltration rates in Australia have been few. One study measured 'natural' infiltration rates in unoccupied houses in Melbourne and found that background infiltration rates were 0.33 air exchanges per hour (ACH) (Biggs et. al.1987).ata. Studies on air infiltration rates in Australia have been few. One study measured 'natural' infiltration rates in unoccupied houses in Melbourne and found that background infiltration rates were 0.33 air exchanges per hour (ACH) (Biggs et. al. 1987).
Doctor of Osteopathic Medicine (D.O. or DO) is a professional doctoral degree for physicians and surgeons offered by medical schools in the United States.
The abbreviation D.O. stands for Doctor of Osteopathic Medicine. This medical profession was founded in the mid-1800s by Andrew Taylor Still. In the 21st century now, D.O.s re â¦ ceive training which is equivalent to the training that Doctors of Medicine (M.D.) receive.