Expandable graphic intercalatable compounds with controllable onset temperatures, methods for their synthesis and their use as intumescing, fire-protection additives for the preparation of flame-retardant compositions. An exemplary method includes loading a first and second revisions of a first computer program file, loading a first revision of a second computer program file, and generating a candidate computer program file. The first and second switching devices are electrically connected to the scan line and the data line and are also electrically connected to the first and second pixel electrodes on the first and second areas respectively. In this apparatus, the routine of assigning the control software elements can be completed fast. Any gravity gradiometer can be used, including a Cross-Component Gravity Gradiometer, an Orthogonal Quadrupole Responder, an In-Line Responder, a Diagonal-Component Gravity Gradiometer, or a Multi-Component Gravity Gradiometer.