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  2. RuneScape - Wikipedia

    en.wikipedia.org/wiki/RuneScape

    A combat level is an indicator of how powerful a player or NPC is in combat. For players, it is determined by applying a mathematical formula to their combat skills. [ 27 ] Players engage in combat by clicking on the enemy they want their character to attack and will automatically continue fighting until they kill their opponent, die, or ...

  3. Level of invention - Wikipedia

    en.wikipedia.org/wiki/Level_of_invention

    Level of invention (or degree of inventiveness, or level of solution, or rank of solution, or rank of invention) is a relative degree of changes to the previous system (or solution) in the result of solution of inventive problem (one containing a contradiction). Term was defined and introduced by TRIZ author G. S. Altshuller.

  4. TRIZ - Wikipedia

    en.wikipedia.org/wiki/TRIZ

    TRIZ flowchart Contradiction matrix 40 principles of invention, principles based on TRIZ. One tool which evolved as an extension of TRIZ was a contradiction matrix. [14] The ideal final result (IFR) is the ultimate solution of a problem when the desired result is achieved by itself.

  5. Level (optical instrument) - Wikipedia

    en.wikipedia.org/wiki/Level_(optical_instrument)

    The Y level or wye level is the oldest and bulkiest of the older style optical instruments. A low-powered telescope is placed in a pair of clamp mounts, and the instrument then leveled using a spirit level, which is mounted parallel to the main telescope. The term dumpy level (also builder's level) endures despite the evolution in design. They ...

  6. Laser level - Wikipedia

    en.wikipedia.org/wiki/Laser_level

    The concept of a laser level has been around since at least the early 1970s, [2] the original spinning-mirror design laser plane and line level was patented by the late 1980s, [3] and the compact lens-based laser line level (as produced by many tool manufacturers today) was patented in the late 1990s. It was invented by Oscar Soliz in the late ...

  7. List of pre-Columbian inventions and innovations of ...

    en.wikipedia.org/wiki/List_of_pre-Columbian...

    The bridge was constructed in the 7th century CE and was a very long suspension bridge with a relatively level pathway. Syringe – indigenous American medicine men used syringes and hypodermic needles made from materials fashioned from hollow bird bones and animal bladders to inject medicine into sick patients and treat the illness of the ...

  8. Rube Goldberg machine - Wikipedia

    en.wikipedia.org/wiki/Rube_Goldberg_machine

    The cartoon above is Goldberg's Professor Butts and the Self-Operating Napkin, which was later reprinted in a few book collections, including the postcard book Rube Goldberg's Inventions! and the hardcover Rube Goldberg: Inventions, both compiled by Maynard Frank Wolfe from the Rube Goldberg Archives. [1]

  9. Timeline of United States inventions (before 1890) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_United_States...

    Many years later, Evans' invention would be sold off for parts. On July 16, 2005, Philadelphia celebrated the 200th anniversary of Oliver Evans's Orukter Amphibolos. Many historians describe Oliver Evans' invention as the United States' first land and water transporter. [46] 1805 Vapor-compression refrigeration. Schematic of Gorrie's 1841 ice ...