Now showing items 1-2 of 2

    • A Theory of Atmospheric Oxygen 

      Laakso, Thomas (2015-05-08)
      There is no direct geologic record of the level of free oxygen in the atmosphere over Earth history. Indirect proxy records have led to a canonical view of atmospheric pO2, according to which the atmosphere has passed ...
    • What Can We Conclude from Death Registration? Improved Methods for Evaluating Completeness 

      Murray, Christopher; Rajaratnam, Julie Knoll; Marcus, Jacob; Laakso, Thomas Andrew; Lopez, Alan D. (Public Library of Science, 2010)
      Background: One of the fundamental building blocks for determining the burden of disease in populations is to reliably measure the level and pattern of mortality by age and sex. Where well-functioning registration systems ...