The custom - built, raised beds feature pull out drawers and each room has a ceiling fan and windows to allow for natural circulation of the cool Hawaiian trade winds. (kekahaoceansidekauai.com)
Recent scientific studies increasingly question whether human activities have contributed to observed shifts in natural circulation patterns. (ucsusa.org)
Natural circulation in the reactor alone is enough to remove all the heat generated by the radioactive decay of the elements in the reactor fuel. (scientificamerican.com)