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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 ...
Environmental, operational, or design factors can all negatively impact a worker or user; examples include whole-body or hand/arm vibration, poor lighting, or poorly designed tools, equipment, or workstations. Some of the common body regions where injuries may occur include:
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Vibration exposure is also associated with hand-arm vibration syndrome, which has symptoms of lack of blood circulation to the fingers, nerve compression, tingling, and/or numbness. [19] Recent epidemiological studies identify gender as a significant risk factor in occurrence of MSDs among workers in gender-related occupations, e.g. hairdressers .
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For a child, there is a difference between oral language learning and reading. In oral language learning, the mapping between a symbol (word) and the object is common – often brought about by gesturing to the object. [23] However, when a child is learning to read, they focus on the letter-sound combinations and the correct pronunciation of ...
Gestures are distinct from manual signs in that they do not belong to a complete language system. [6] For example, pointing through the extension of a body part, especially the index finger to indicate interest in an object is a widely used gesture that is understood by many cultures [7] On the other hand, manual signs are conventionalized—they are gestures that have become a lexical element ...
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