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The reasoning behind this approach is that the H1-helixes naturally present in PhM molecules interact significantly with the tags on H1-Fr, acting as 'recruiting agents' that bind the foreign proteins onto the crystal.

The H2S PHM is also only as good as the available data, and more data is needed.

By using a data-based PHM, station operators could reduce the frequency of unscheduled maintenance and increase the frequency of preventive maintenance.

Using a hypothetical example, the researchers considered a dispenser valve that the H2S PHM has flagged as needing attention.

The researchers have dubbed this particular PHM "hydrogen station prognostics health monitoring," or H2S PHM.