Three Cornellians were among those celebrating Jan. 23 when nominations were announced for this year’s Academy Awards.Reed Van Dyk and Trevor White, both ’07, received nominations, Van Dyk for his writing/directing on the documentary “DeKalb Elementary,” and White for production of “The Post.” David Greenbaum ’98 is co-head of production for Fox Searchlight Pictures, which had two nominated films, “Shape of Water” and “Three Billboards Outside Ebbing Missouri.”