The invention provides a method of determining a lattice constant of an arbitrary material such as a polycrystalline material speedily and easily, and a method of evaluating the stress and strain of the material speedily. The bottom wall defines a relatively narrow, arcuate flow receptacle extending continuously outwardly from a portion of the perimeter of the bottom wall. The integrally-formed, mesh panel has a front face, a top edge and a plurality of strands. In addition, the invention provides a method for treating a subject having a pain disorder characterized by aberrant 2047 polypeptide activity or aberrant 2047 nucleic acid expression.