In this paper we treat the two-variable positive extension problem for trigonometric polynomials where the extension is required to be the reciprocal of the absolute value squared of a stable ...

Background: While exposure to ambient fine particles <2.5 μm in aerodynamic diameter (PM2.5) has well-established health effects, there is limited quantitative evidence that links specific sources of ...

The Pods are an innovative technology designed by Mike Hannigan's Research Group at the University of Colorado Boulder through the support of the AirWaterGas Sustainability Research Network Education ...