Sue Whiteman / Getty Images The sugar pine (Pinus lambertiana) can be identified by its huge cones, which can reach lengths of more than 20 inches and are about 4 to 6 inches wide. Sugar pines can ...

Dielectrics with functionally graded material (d-FGM), which have spatially nonuniform dielectric properties, is effective to improve the insulation performance without complicating the structure. In ...