Mineral industry of Africa in 2005 from 16.1% in 2004. In 2005, the principal mineral targets in Africa were copper, diamond, gold, and platinum group metals (PGM). African countries that experienced the highest levels of exploration activity in 2005 were, in descending order based on the number of exploration sites as compiled by the USGS, South Africa, Burkina Faso, Ghana, and Zambia, but activity took place in a number of other countries. Gold accounted for approximately 51% of reported African exploration projects, diamond accounted for about 14%, copper and PGM each accounted for about 11%, and nickel accounted for 5%. Early stage projects accounted
Cristian S. Calude Cristian S. Calude Cristian Sorin Calude (born 21 April 1952) is a Romanian-New Zealander mathematician and computer scientist. He graduated from the National College Vasile Alecsandri in Galați, and the University of Bucharest and was student of Grigore C. Moisil and Solomon Marcus. He is currently chair professor at the University of Auckland, New Zealand and also the founding director of the Centre for Discrete Mathematics and Theoretical Computer Science. Visiting Professor in many universities in Europe, North and South America, Australasia, South Africa, including Monbusho Visiting Professor, JAIST, 1999 and Visiting Professor ENS, Paris, 2009, École Polytechnique, Paris, 2011;