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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 ...
The NIOSH lifting Equation does have some limitations which include: Only using one hand for lifting/lowering; Lifting or lowering for over 8 hours; Lifting or lowering while in the seated or kneeling position; Lifting or lowering in restricted areas (where full range of motion cannot be achieved; Lifting or lowering unstable objects
In occupational safety and health, hand arm vibrations (HAVs) are a specific type of occupational hazard which can lead to hand–arm vibration syndrome (HAVS). HAVS, also known as vibration white finger ( VWF ) or dead finger , [ 1 ] is a secondary form of Raynaud's syndrome , an industrial injury triggered by continuous use of vibrating hand ...
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Casualty lifting: roll-and-lift method with a long spine board alternative for the position of the rescuers; note the arms that cross on the hips roll-and-lift with a flexible stretcher manual roll-and-lift method, or "spoon lifting", with three team members. The rolling methods can only be used on a casualty who does not have an unstable trauma.
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]
Arising in cut timber they generally cause a reduction in strength. When found in a log they can result in a significant amount of waste, when a log is converted to lumber. Apart from heart shakes, often found in trees felled past their best, shakes in a log have no effect on the strength of shake free lumber obtained therefrom. [1]
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