The invention is in the field of using a computer implemented method to calculate and provide recommendations for stock share investment timing. The tunnel junctions can include a first semiconductor material having a resistance parameter for conducting a current and a second semiconductor material having a resistance parameter that is more restrictive to conduction of a current than the resistance parameter of the first semiconductor material. The tube shape of the honeycomb body is retained by providing a shell around the perimeter of the honeycomb body. The workflow is executed by executing the flow-based region and the constraint-based region. A bid is received from at least one vendor in the vendor selection pool, the lowest price bid is identified, the buyer is informed of the identity of the selected vendor, and solicited for approval of the selected vendor. A second outlet manifold is isolated from the second inlet manifold and is fluidly coupled to second ends of the first group of tubes.