The subject invention pertains to thermoelectric power generation. The orientation angles of each tile element may be selected based on a characteristic of a corresponding pixel of an image, such that the observer sees a representation of that image created by the varying amount of light directed to the viewing location by the tile elements. NGAL protein expression is detected predominantly in proximal tubule cells, in a punctuate cytoplasmic distribution reminiscent of a secreted protein. The corner member is attached to the flange by a load-bearing connection, and can support a predetermined portion of a weight of the duct by connection of the corner member to a first mating member connectable to a second mating member secured to a corresponding support member.