(1) Leaves of alder (Alnus glutinosa Gaertner) and beech (Fagus sylvatica L.) were conditioned in an acid and a circumneutral stream. Conditioned leaves in litter bags then underwent a period of ...

Getting the most out of A/B and other controlled tests by Ron Kohavi and Stefan Thomke In 2012 a Microsoft employee working on Bing had an idea about changing the way the search engine displayed ad ...