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  2. Leitmotif - Wikipedia

    en.wikipedia.org/wiki/Leitmotif

    A leitmotif or Leitmotiv [1] (/ ˌ l aɪ t m oʊ ˈ t iː f /) is a "short, recurring musical phrase" [2] associated with a particular person, place, or idea. It is closely related to the musical concepts of idée fixe or motto-theme . [ 2 ]

  3. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    Quizlet's primary products include digital flash cards, matching games, practice electronic assessments, and live quizzes. In 2017, 1 in 2 high school students used Quizlet. [ 4 ] As of December 2021, Quizlet has over 500 million user-generated flashcard sets and more than 60 million active users.

  4. Leitmotifs - Wikipedia

    en.wikipedia.org/?title=Leitmotifs&redirect=no

    From the plural form: This is a redirect from a plural noun to its singular form.. This redirect link is used for convenience; it is often preferable to add the plural directly after the link (for example, [[link]]s).

  5. Timeline of historic inventions - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_historic...

    1656: Pendulum clock: Invented by Christiaan Huygens. It was first conceptualized in 1637 by Galileo Galilei but he was unable to create a working model. [392] 1663: Friction machine: Invented by Otto von Guericke. 1668: First functional reflecting telescope constructed by Isaac Newton. [393] 1679: Pressure-cooker: Invented by Denis Papin. [394]

  6. Reinventing the wheel - Wikipedia

    en.wikipedia.org/wiki/Reinventing_the_wheel

    To reinvent the wheel is to attempt to duplicate—most likely with inferior results—a basic method that has already previously been created or optimized by others.. The inspiration for this idiomatic metaphor is that the wheel is an ancient archetype of human ingenuity (one so profound that it continues to underlie much of modern technology).

  7. Porter's five forces analysis - Wikipedia

    en.wikipedia.org/wiki/Porter's_five_forces_analysis

    A graphical representation of Porter's five forces. Porter's Five Forces Framework is a method of analysing the competitive environment of a business. It draws from industrial organization (IO) economics to derive five forces that determine the competitive intensity and, therefore, the attractiveness (or lack thereof) of an industry in terms of its profitability.

  8. Guns versus butter model - Wikipedia

    en.wikipedia.org/wiki/Guns_versus_butter_model

    The production possibilities frontier (PPF) for guns versus butter. Points like X that are outside the PPF are impossible to achieve. Points such as B, C, and D illustrate the trade-off between guns and butter: at these levels of production, producing more of one requires producing less of the other.

  9. Vernon L. Smith - Wikipedia

    en.wikipedia.org/wiki/Vernon_L._Smith

    Vernon Lomax Smith (born January 1, 1927) is an American economist who is currently a professor of economics and law at Chapman University. [1] He was formerly the McLellan/Regent’s Professor of Economics at the University of Arizona, a professor of economics and law at George Mason University, and a board member of the Mercatus Center. [1]