Luna - set to be elected at a Monday shareholder meeting to the Petrobras board of directors, and then as CEO - has no experience in the oil sector. His last posting, as head of the Itaipu hydroelectric dam on the Paraguay border, is a far cry from running one of the southern hemisphere's largest companies. Petrobras shares fell sharply when Luna's predecessor, Roberto Castello Branco, was forced out after the group hiked domestic fuel prices several times in February, angering Bolsonaro. Yet Luna and those around him insist market jitters are overblown. Luna has pledged to keep politicians from filling key Petrobras positions with underqualified allies, a serious problem under previous administrations. A native of Brazil's northeastern Pernambuco state and a career soldier, Luna served as Brazil's defense minister in
Archimedes - Wikipedia
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Considered to be the greatest mathematician of ancient history , and one of the greatest of all time,        Archimedes anticipated modern calculus and analysis by applying the concept of the infinitely small and the method of exhaustion to derive and rigorously prove a range of geometrical theorems ,  including: the area of a circle ; the surface area and volume of a sphere ; area of an ellipse ; the area under a parabola ; the volume of a segment of a paraboloid of revolution ; the volume of a segment of a hyperboloid of revolution ; and the area of a spiral. His other mathematical achievements include deriving an accurate approximation of pi ; defining and investigating the spiral that now bears his name ; and creating a system using exponentiation for expressing very large numbers. He was also one of the first to apply mathematics to physical phenomena , founding hydrostatics and statics , including an explanation of the principle of the lever.
With great beauty comes great resentment. I n the archives of Trinity Hall College, Cambridge, there is an infrequently studied medieval manuscript. The Consolation is a fusion of Christian and pagan principles written in an attempt to identify the root of happiness — and set down while the author Boethius was awaiting execution in Pavia. On one page of the discoloured parchment, Helen of Troy, dressed in the fashionable robes of the day, stands on a parapet while flags flutter on the towers of the castle behind her; she stares down at Paris who is climbing up to greet her. Helen has a flick of rouge on her cheeks.