A portable physical agents directive (PAD) dosimeter system may be provided. The portable PAD dosimeter system may include a housing and at least one accelerometer configured to generate electrical signals corresponding to a vibration exposure of an operator of a work machine. The portable PAD dosimeter system may also include a controller disposed in the housing configured to process the electrical signals and to determine whether the vibration exposure is above a predetermined threshold.

 
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> Membrane electrode assemblies for use in fuel cells

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