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Granular convection is a phenomenon where granular material subjected to shaking or vibration will exhibit circulation patterns similar to types of fluid convection. [2] It is sometimes called the Brazil nut effect , [ 3 ] when the largest of irregularly shaped particles end up on the surface of a granular material containing a mixture of ...
A classic symptom is a characteristic fine tremor in the hands, which is traditionally described as a "pill-rolling" action of the hands, [3] but Parkinsonian tremor may also affect the arms, chin, lips, legs, and trunk, and can be markedly increased by stress or emotion. Onset is generally after age 60.
Essential tremor (ET), also called benign tremor, familial tremor, and idiopathic tremor, is a medical condition characterized by involuntary rhythmic contractions and relaxations (oscillations or twitching movements) of certain muscle groups in one or more body parts of unknown cause. [6]
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Physiologic tremor is a tremor or trembling of a limb or other body part. The recorded frequency is in the range of 8-12Hz. It occurs in normal individuals, especially when they are stressed by anxiety or fatigue.
Here is a compilation put together in February that exemplifies Trump's "pull" and forceful style of handshake:
A variation on a dap greeting, 2009. The practice and term originated among black soldiers during the Vietnam War as part of the Black Power movement. [3] [4] Ninety percent of those imprisoned in the Long Binh Jail during the war were African Americans; it was in the jail that the handshake was created under pan-African nationalist influences.
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