• Background and Aims The dwarf shrub Cassiope tetragona (Arctic bell-heather) is increasingly used for climate reconstructions, the reliability of which depends on the existence of a linear ...

Cylindrical and spherical coordinates, double and triple integrals, line and surface integrals. Change of variables in multiple integrals; gradient, divergence, and ...

Polygonum pensylvanicum and Abutilon theophrasti, components of old-field communities in central Illinois were grown on a controlled soil moisture gradient to determine whether they exhibit different ...

Our main concern in this article has to do with the relationship of a pressure system to its surroundings. Air pressure can be measured (atm, hectopascal, millibar) but the relative difference between ...