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  2. Diminishing returns - Wikipedia

    en.wikipedia.org/wiki/Diminishing_returns

    An example would be a factory increasing its saleable product, but also increasing its CO 2 production, for the same input increase. [2] The law of diminishing returns is a fundamental principle of both micro and macro economics and it plays a central role in production theory. [5]

  3. Returns to scale - Wikipedia

    en.wikipedia.org/wiki/Returns_to_scale

    A firm's production function could exhibit different types of returns to scale in different ranges of output. Typically, there could be increasing returns at relatively low output levels, decreasing returns at relatively high output levels, and constant returns at some range of output levels between those extremes. [1]

  4. Sample-return mission - Wikipedia

    en.wikipedia.org/wiki/Sample-return_mission

    The sample return capsule from NASA’s OSIRIS-REx mission shortly after touching down in the desert in Utah. A sample-return mission is a spacecraft mission to collect and return samples from an extraterrestrial location to Earth for analysis. Sample-return missions may bring back merely atoms and molecules or a deposit of complex compounds ...

  5. Markov decision process - Wikipedia

    en.wikipedia.org/wiki/Markov_decision_process

    Both on a theoretical and on a practical level, effort is put in maximizing the sample efficiency, i.e. minimimizing the number of samples needed to learn a policy whose performance is close to the optimal one (due to the stochastic nature of the process, learning the optimal policy with a finite number of samples is, in general, impossible).

  6. Return on investment - Wikipedia

    en.wikipedia.org/wiki/Return_on_investment

    Return on investment (ROI) or return on costs (ROC) is the ratio between net income (over a period) and investment (costs resulting from an investment of some resources at a point in time). A high ROI means the investment's gains compare favourably to its cost.

  7. History of United States foreign policy - Wikipedia

    en.wikipedia.org/wiki/History_of_United_States...

    The policy has been called "democratic realism," "national security liberalism," "democratic globalism," or "messianic universalism." The policy helped inspire democratic upheavals in the Middle East. [218] German Chancellor Angela Merkel and U.S. President George W. Bush. Across the world there was a transition from a bipolar world to a ...