Below is the graph of a quadratic function, showing where the function is increasing and decreasing. If we draw in the tangents to the curve, you will notice that if the gradient of the tangent is ...

The aim of this study was to investigate the wavefront aberration changes in human eyes caused by a gradient of increasing accommodation stimuli. Healthy volunteers (n=22) aged 18–28 years whose ...

The Review of Economics and Statistics is an 84-year old general journal of applied (especially quantitative) economics. Edited at Harvard University's Kennedy School of Government, The Review has ...

These results suggest a potential mechanism for the diversity–ecosystem-function relationships measured in long-term studies of agroecosystems, in which regular use of legume cover crops increases ...