A memory cell module comprises a memory cell array formed by memory cells of M columnsN rows. The optical fiber includes a core and cladding, the cladding having an annular inner region, an annular ring region, and an annular outer region. The valve is formed in two separate halves that are fused or adhered to each other to form a sealed weak bond that is easily broken during splitting of the sheath; each valve half is mechanically affixed in a proximal valve-receiving recess of the hub such as by anchor posts extending through apertures in ears of each valve half. The service optimizes power flows to suit the needs of each resource and each resource owner, while aggregating flows across numerous resources to suit the needs of the power grid.