Calculus of variations establishes a framework to determine the extrema of functionals—mappings from functions to real numbers—which has been pivotal in elucidating natural principles such as the ...

Lyme disease is a common tick-borne illness caused by a bacterium, which is transmitted to humans through the bite of infected ticks. In a paper published, authors propose a reaction-diffusion model ...

Looking at more than 2,000 U.S. high schools that one might imagine are most likely to succeed based on their student demographics, a new study finds strikingly wide variations in the share of ...

Annals of Botany, Vol. 93, No. 2 (February 2004), pp. 149-156 (8 pages) • Background and Aims In some dicotyledonous leaves and leaflets, the secondary veins run more-or-less straight to the margins ...