A device such as an electric motor, an electric generator, and a regenerative electric motor includes a plurality of independent energizable electromagnetic assemblies. Each independent electromagnetic assembly has an associated one-piece magnetic core formed from thin film soft magnetic material. Each independent electromagnetic assembly defines two stator poles located at opposite ends of the one-piece magnetic core. Each one-piece magnetic core provides the entire magnetic return path for the two opposite magnetic stator poles associated with each independent electromagnetic assembly.

 
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> Silicon nitride powder, silicon nitride sintered body, sintered silicon nitride substrate, and circuit board and thermoelectric module comprising such sintered silicon nitride substrate

> Fabrication of molecular scale devices using fluidic assembly
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