Thermal interface materials are disclosed that include or are based on thermally reversible gels, such as thermally reversible gelled fluids, oil gels and solvent gel resins. The control circuit includes a primary processor, a safety processor in signal communication with the primary processor, the safety processor, and a segmented circuit. Methods, compositions, and kits generated through rational design of siRNAs are disclosed including those directed to PTTG1. The memristive gate is disposed over the channel-formation portion and coupled with the channel-formation portion. The robust estimator may determine an alignment model for a pair of images from the rotation, distortion, and focal lengths.