This form of cerebellar degeneration may precede cancer. Alcoholic or nutritional cerebellar degeneration affects alcoholics and people with thiamine deficiency. It is not related to cancer and is more common than the paraneoplastic type.
Liquefaction is the process of loose soil acting like a liquid during an earthquake. Most of the time, buildings and homes are built upon solid bedrock.
Rarefaction is the reduction of an item's density, the opposite of compression. Like compression, which can travel in waves, rarefaction waves also exist in nature. A common rarefaction wave is the area of low relative pressure following a shock wave. Rarefaction waves expand with time; in most cases rarefaction waves keep the same overall profile at all times throughout the wave's movement: it is a self-similar expansion. Each part of the wave travels at the local speed of sound, in the local m