The eddy-covariance method often underestimates fluxes under stable, low-wind conditions at night when turbulence is not well developed. The most common approach to resolve the problem of nighttime flux underestimation is to identify and remove the deficit periods using friction-velocity (u*) threshold filters (u*[superscript Th]). This study modifies an accepted...
Earth system processes exhibit complex patterns across time, as do the models that seek to replicate these processes. Model output may or may not be significantly related to observations at different times and on different frequencies. Conventional model diagnostics provide an aggregate view of model–data agreement, but usually do not...
As a standard practice, the use of radioactive materials has been widely used when treating many diseases. In recent years advances in biotechnology and labeling techniques have broadened the application of these materials. Candidates selected for radiopharmaceutical therapy may be treated on an outpatient basis or hospitalized following administration to...
Accurately simulating gross primary productivity (GPP) in terrestrial ecosystem models is critical because errors in simulated GPP propagate through the model to introduce additional errors in simulated biomass and other fluxes. We evaluated simulated, daily average GPP from 26 models against estimated GPP at 39 eddy covariance flux tower sites...
A mathematical model of a differential thermal analysis (DTA)
system was formulated so that influence of the various physical parameters
on the DTA peak could be determined. The specific DTA apparatus
simulated had cylindrical sample holes drilled into a nickel
block considered to have a negligible thermal resistance, and the...
Populations of Douglas-fir seedlings from interior British
Columbia, Vancouver Island, and Arizona received six bi-weekly
foliar spray applications of the growth regulators IAA, CCC, and
B-995, each at three concentration levels under controlled environmental
conditions. Large differences were found among the three
populations in their responses to the growth regulators....
