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[1] We use a global three-dimensional coupled oxidant-aerosol model (GEOS-CHEM) to estimate natural and transboundary pollution influences on sulfate-nitrate-ammonium aerosol concentrations in the United States. This work is motivated in part by the Regional Haze Rule of the U.S. Environmental Protection Agency (EPA), which requires immediate action to(More)
Dawson and Foss (1985) have reported that each of five naive budgerigars (Melopsittacus undulatus ) after watching a demonstrator budgerigar use one of three different methods of opening a covered food dish, used the same method as its respective demonstrator to uncover its own food fish. Our first attempt to replicate Dawson and Foss' experiment was(More)
—A fully-integrated single-photon avalanche diode (SPAD) and time-to-digital converter (TDC) array for high-speed fluorescence lifetime imaging microscopy (FLIM) in standard 130-nm CMOS is presented. This imager is comprised of an array of 64-by-64 SPADs each with an independent TDC for performing time-correlated single-photon counting (TCSPC) at each(More)