A graft, for example, an arterio-venous shunt graft, is provided, which in a first aspect of the subject invention, is formed with longitudinal ribs. The particulate material has a 500 psi Compaction Volume Ratio of at least about 4. The second conductive pattern is overlaid the first conductive pattern such that the second land is positioned over the first land. The user assigns the virtual blocks to the user module. A method for measuring the weight of a fetus in is also disclosed. The front panel is movable to slide under the base of the container to arrange the front panel in the open position.