Daniel Washington

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Climate models used for climate change projections are on the threshold of including much greater biological and chemical detail than previous models. Today, standard climate models (referred to generically as atmosphere-ocean general circulation models , or AOGCMs) include components that simulate the coupled atmosphere, ocean, land, and sea ice. Some(More)
Ants use individual memory and pheromone communication to achieve effective collective foraging. We implement these strategies as distributed search algorithms in robotic swarms. Swarms of simple robots are robust, scalable and capable of exploring for resources in unmapped environments. We test the ability of individual robots and teams of three robots to(More)
Calcium and magnesium in drinking-water : public health significance. The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the World Health Organization concerning the legal status of any country, territory, city or area or of its authorities, or concerning(More)
20-22 warm-spell singularity. These include the presence of a warm, moist tongue of air in the lower atmosphere, passage of a cold front as suggested by a surface wind shift from persistent southerly winds prevalent during the warm spell to cooling north-westerly winds, a 500-mb. trough to the west with southwesterly winds and contour inflection point over(More)
This document is distributed solely for peer review under applicable information quality guidelines. It has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency determination or policy. Mention of trade names or commercial products does not constitute endorsement or recommendation for use. As(More)
[Supplementary material appears in the electronic edition of this issue on the journal's web siteman) for making our excavations at Liangchengzhen possible. The plant-remains analysis is supported by these grants as well as an operating grant from the Social Sciences and Humanities Research Council of Canada, award 72022345. did an exceptional job assisting(More)
  • J A E B U R, E K Nt M P Nashmm, L Manrbrch, N Palombo, T I O N R Lburoau Of Sundrrdr, D C Washington +1 other
  • 2002
C d k g O hh mrykrd 20742 Abs tr a c t There are s i x degree8 o f frocdom t h a t define the position and o r i e n t a t i o n of any object: r e l a t i v e t o a robot gripper. A l l s i x need t o be detormined for the robot t o grasp the object i n a uniquely s p e c i f i e d manner. A robot v i s i o n system under development a t t h e N a t i o n(More)