A method of fluid placement in a hydraulic fracture created in a subterranean formation penetrated by a wellbore that comprises the use of one or more reactants that form a low friction layer between the fluids that penetrate the fracture in consecutive treatment stages. A mobile network node is managed when the node is connected to the network. The algorithm assumes that every pair of nodes has a unique edge between them. An upper end of the light attenuating portion is positioned below the electrical interface. At least a portion of one of the root region, the main region and the tip region includes an airfoil profile section defined by a scaled set of coordinates in which a set of yc coordinates listed in Table I are scaled by a selected factor.