In this paper we test different conjugate gradient (CG) methods for solving largescale unconstrained optimization problems. The methods are divided in two groups: the first group includes five basic ...

Journal of Vegetation Science, Vol. 20, No. 6 (Dec., 2009), pp. 984-995 (12 pages) Question: (i) How do species richness and species turnover change along a pH gradient? (ii) What are possible driving ...

(Image courtesy of Getty Images). Electronic devices can be designed thousands of miles from where they are manufactured and ultimately deployed. And they need to be tested every step of the way. But ...

With the ombre hair trend on its way out, a new option has taken its place: the gradient manicure. I spotted a charcoal-tipped version on Sweet Talk on the Spot and set to work recreating it. All told ...