A method for inducing vascular growth in tissue of a mammal comprises the steps of delivering a translocation stimulator such as a cytokine, chemokine or chemoattractant to a target zone of the tissue in the mammal and introducing donor precursor cells to the mammal in order to home the donor precursor cells to the target zone of the tissue for effecting vascular growth at the target zone. The energy density of a split laser beam passed through the liquid crystal mask is set to 1. Then, the pressure values of those samples are compared to find n samples with the highest pressure values. The characters may be arranged based on factors including motor efficiency, optimization of disambiguation and learnability. Specifically, this internal combustion engine is characterized in that an air inlet passageway for introducing air into the scavenging passageways is provided inside a wall portion of the cylinder.