<Abstrate>

We discuss and present search strategies for finding new thermoelectric compositions based

on first principles electronic structure and transport calculations. We illustrate them by

application to a search for potential n-type oxide thermoelectric materials. This includes a

screen based on visualization of electronic energy isosurfaces. We report compounds that show

potential as thermoelectric materials along with detailed properties, including SrTiO3, which

is a known thermoelectric, and appropriatelydoped KNbO3 and rutile TiO2.

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