A CERN-derived lab prototype with Z5 zeolite adsorbent captures CH4 down to 0.1% concentration and uses negative-exponential extrapolation to model performance at 10-100 ppm barn levels.
Fibrations of graphs
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Generalizes graph coverings and unfoldings to weighted versions, proves analogous theorems to Leighton-Norris, and obtains a canonical factorization of universal coverings plus a weighted version of characteristic polynomial factorization.
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Unfoldings and coverings of weighted graphs
Generalizes graph coverings and unfoldings to weighted versions, proves analogous theorems to Leighton-Norris, and obtains a canonical factorization of universal coverings plus a weighted version of characteristic polynomial factorization.