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Mining pool. In the context of cryptocurrency mining, a mining pool is the pooling of resources by miners, who share their processing power over a network, to split the reward equally, according to the amount of work they contributed to the probability of finding a block. A "share" is awarded to members of the mining pool who present a valid ...
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.
RollerCon is a five-day convention, held yearly in Las Vegas for members of the roller derby community. The convention was first held in 2005 and is organized by skaters Ivanna S. Pankin and Trish the Dish. The 2012 conference was five days long. There was skating. There was drinking. Not at the same time. [1]
Coin roll hunting (often abbreviated as CRH) is the hobby of searching and sorting coinage pulled from circulation for collectible coins. This is achieved through obtaining rolled coin, boxed coin, or bagged coin from banks and credit unions. A variant of this practice involves banknotes and is carried out in essentially the same fashion ...
Coin wrapper. A coin wrapper, also known as a bank roll or simply a roll, is a paper or plastic container designed to hold a specific number of coins. During 19th century, newly minted coins were collected in cloth bags. Initially, coin wrapping was a manual process. Since the onset of the 20th century, coin wrapping machines have been in use.
Coin grading. Coin grading[1] is the process of determining the grade or condition of a coin, one of the key factors in determining its collectible value. A coin's grade is generally determined by six criteria: strike, preservation, luster, color, attractiveness, and occasionally the country/state in which it was minted.
The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673, when he presented a wooden model to the Royal Society of London [2] and completed in 1694). [1] The name comes from the translation of the German term for its operating mechanism, Staffelwalze ...
In July 2018, Vos released a video demonstrating a calculator created using roller coasters within RollerCoaster Tycoon 2. [3] [4] In December 2018, Vos demonstrated a ride which would take 12 real-life years to complete. [5] In July 2019, he released a video demonstrating a ride that would take 45 real-life years to complete. [6]