Petrophase is the leading conference for petroleum properties and fouling behavior. Chris Holt and Paul Eaton prepared a poster for petrophase showing typical results from hot wire fouling testing by Athlon Solutions. The correlation between deposits in the lab with deposits retrieved from delayed coker furnaces was quite good with both deposits containing an iron sulfide plume structure. Tree ring structures in the furnace deposits were discussed and related to variations in the furnace feed material during the operation of the furnace. This poster was presented in Paris France and received significant attention from several fouling researchers.