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A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
Ninja miner is a nickname for a person who digs small unauthorized mines or pans dirt for gold in Mongolia. [1] The miners are so named because the green bowls they use for panning, when carried on their backs, are said to resemble the shells of the Teenage Mutant Ninja Turtles .
The Sovereign was one of the last calculators produced during Sinclair's foray into the calculator market that had started with the Sinclair Executive in September 1972. [1] The Executive had retailed for £80 when introduced, but in little over a year it was possible to purchase a Sinclair calculator for £20 and by November 1976 a model was ...
Bre-X bought the Busang site in March 1993 and in October 1995 announced significant amounts of gold had been discovered, sending its stock price soaring. Originally a penny stock , its stock price reached a peak at CAD $286.50 (split adjusted) in May 1996 on the Toronto Stock Exchange (TSE), with a total capitalization of over CAD $6 billion.
Net Smelter Return (NSR) is the net revenue that the owner of a mining property receives from the sale of the mine's metal/non metal products less transportation and refining costs. As a royalty it refers to the fraction of net smelter return that a mine operator is obligated to pay the owner of the royalty agreement. The royalty is paid in ...
Rio Tinto's iron ore operations in the Pilbara began in 1966, [2] with the Mount Tom Price mine opening that year. Mount Tom Price was the company's first mine to open in the Pilbara. [8] The mine has an annual production capacity of 28 million tonnes of iron ore, sourced from open-pit operations.
Retreat mining is a particularly dangerous form of mining. According to the Mine Safety and Health Administration (MSHA), pillar recovery mining has been historically responsible for 25% of American coal mining deaths caused by failures of the roof or walls, even though it represents only 10% of the coal mining industry. [13]
[7] [8] Mining of cryptocurrencies that use scrypt is often performed on graphics processing units since GPUs tend to have significantly more processing power (for some algorithms) compared to the CPU. [9] This led to shortages of high end GPUs due to the rising price of these currencies in the months of November and December 2013. [10]