1 A review of research involving human subjects by the IRB chair or by one or more experienced reviewers designated by the chair from among members of the IRB in accordance with the requirements set forth in 45 CFR 46.110. 2  Experimental subject (as defined by Department of Defense, or DOD).
Anvil clouds are the icy upper portions of cumulonimbus thunderstorm clouds that are caused by a rising of air in the lower portions of the atmosphere. When the rising air reaches 40,000-60,000 or more feet, it tends to spread out in a characteristic anvil shape.
Altocumulus (Ac) - the name derives from the latin words altus = high and cumulus = mass or heap. Altocumulus is a member of the ten fundamental cloud types (or cloud genera). It is a middle-level cloud, thus they usually form between 2 to 7 kilometers (6,500 to 22,000 ft). Altocumulus cloud usually occur as a layer or patch of more or less separate cloudlets in the form of heaps, rolls, billows or pancakes.