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  2. Kick-off (association football) - Wikipedia

    en.wikipedia.org/wiki/Kick-off_(association...

    A kick-off is used to start each half of play, and each period of extra time where applicable. The team that wins the pre-game coin toss may choose either . to take the initial kick-off (in which case the team losing the toss chooses which end of the pitch to attack in the first half), or

  3. Moderated mediation - Wikipedia

    en.wikipedia.org/wiki/Moderated_mediation

    Moderated mediation, also known as conditional indirect effects, [2] occurs when the treatment effect of an independent variable A on an outcome variable C via a mediator variable B differs depending on levels of a moderator variable D. Specifically, either the effect of A on B, and/or the effect of B on C depends on the level of D.

  4. Tournament (graph theory) - Wikipedia

    en.wikipedia.org/wiki/Tournament_(graph_theory)

    The Hamiltonian paths are in one-to-one correspondence with the minimal feedback arc sets of the tournament. [5] Rédei's theorem is the special case for complete graphs of the Gallai–Hasse–Roy–Vitaver theorem , relating the lengths of paths in orientations of graphs to the chromatic number of these graphs.

  5. Sound amplification by stimulated emission of radiation

    en.wikipedia.org/wiki/Sound_amplification_by...

    In coupled quantum wells there are two possible ways for electrons and holes to be bound into an exciton: indirect exciton and direct exciton. In indirect exciton, electrons and holes are in different quantum wells, in contrast with direct exciton where electrons and holes are located in the same well.

  6. Presentational and representational acting - Wikipedia

    en.wikipedia.org/wiki/Presentational_and...

    In some plays all of the actors may adopt the same attitude towards the audience (for example, the entire cast of a production of a Chekhovian drama will usually ignore the audience until the curtain call); in other plays the performers create a range of different relationships towards the audience (for example, most Shakespearean dramas have ...

  7. Economic impact analysis - Wikipedia

    en.wikipedia.org/wiki/Economic_impact_analysis

    The indirect effect is a measure of this increase in business-to-business activity (not including the initial round of spending, which is included in the direct effects). [2] Induced effects are the results of increased personal income caused by the direct and indirect effects. Businesses experiencing increased revenue from the direct and ...

  8. Influence of mass media - Wikipedia

    en.wikipedia.org/wiki/Influence_of_mass_media

    An indirect effect indicates that an independent variable (e.g., media use) affecting the dependent variables (e.g., outcomes of media use) via one or more intervening (mediating) variables. The conceptualization of indirect media effects urges attention to be paid to those intervening variables to better explain how and why media effects occur.

  9. Free kick (association football) - Wikipedia

    en.wikipedia.org/wiki/Free_kick_(association...

    The referee signals an indirect free kick by raising the arm vertically above the head; a direct free kick is signaled by extending the arm horizontally. [1] A popular method for identifying the different signals is that, for indirect free kicks, the referee holds his hand above his head, creating the letter "I", for an indirect free kick.