The martensite structure in polycrystalline Fe–Pd has been examined from a mechanics and a crystallographic point of view. The structure consists of dark and bright plates, parallel to {110}, which, under no stress, exist in an equal amount. A plate has a fine structure, in which a set of twin-related variants adjoining on {110} interfaces is stacked together. That is, the dark plate contains t...

We consider dynamic loading and unloading problems for heavy geometric objects. The challengeis to maintain balanced configurations at all times: minimize the maximal motion of the overall centerof gravity. While this problem has been studied from an algorithmic point of view, previous work onlyfocuses on balancing the final center of gravity; we give a variety of results for co...

Power transfer distribution factors depend on the operating point and topology of an electric power system. However, it is known empirically that, for a fixed topology, the power transfer distribution factors are relatively insensitive to the operating point. We demonstrate this result theoretically for systems of arbitrary topology with losses, but only for the special case of having reactive ...