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  2. Precision and recall - Wikipedia

    en.wikipedia.org/wiki/Precision_and_recall

    In a classification task, the precision for a class is the number of true positives (i.e. the number of items correctly labelled as belonging to the positive class) divided by the total number of elements labelled as belonging to the positive class (i.e. the sum of true positives and false positives, which are items incorrectly labelled as belonging to the class).

  3. Social media marketing - Wikipedia

    en.wikipedia.org/wiki/Social_media_marketing

    This can eventually be translated into buying behavior, or voting and donating behavior in a political context. New online marketing concepts of engagement and loyalty have emerged which aim to build customer participation and brand reputation. [24] Engagement in social media for the purpose of a social media strategy is divided into two parts.

  4. Q Score - Wikipedia

    en.wikipedia.org/wiki/Q_Score

    For example, in 2000, IBM hired Marketing Evaluations to calculate the Q Score for Deep Blue, the supercomputer that defeated chess Grandmaster Garry Kasparov. Deep Blue’s Q Score was 9, meaning the computer was as familiar and appealing at the time as Carmen Electra , Howard Stern , and Bruce Wayne .

  5. Lapse rate - Wikipedia

    en.wikipedia.org/wiki/Lapse_rate

    The environmental lapse rate (ELR), is the actual rate of decrease of temperature with altitude in the atmosphere at a given time and location. [6] The ELR is the observed lapse rate, and is to be distinguished from the adiabatic lapse rate which is a theoretical construct. The ELR is forced towards the adiabatic lapse rate whenever air is ...

  6. Ball-and-disk integrator - Wikipedia

    en.wikipedia.org/wiki/Ball-and-disk_integrator

    A similar calculator formed the basis of the Torpedo Data Computer, which solved the more demanding problem of the very long engagement times of torpedo fire. A well-known example is the Norden bombsight which used a slight variation on the basic design, replacing the ball with another disk. In this system the integrator was used to calculate ...

  7. OECD Better Life Index - Wikipedia

    en.wikipedia.org/wiki/OECD_Better_Life_Index

    Some indicators have been removed or updated, Governance has been renamed civic engagement, the employment rate of women with children has been replaced by the full integration of gender information in the employment data and students' cognitive skills (e.g. student skills in reading, math and sciences) has replaced students' reading skills to ...

  8. Compound annual growth rate - Wikipedia

    en.wikipedia.org/wiki/Compound_annual_growth_rate

    Compound annual growth rate (CAGR) is a business, economics and investing term representing the mean annualized growth rate for compounding values over a given time period. [ 1 ] [ 2 ] CAGR smoothes the effect of volatility of periodic values that can render arithmetic means less meaningful.

  9. Kerrison Predictor - Wikipedia

    en.wikipedia.org/wiki/Kerrison_Predictor

    Kerrison's analog computer was the first to be fast enough to be used in the demanding high-speed low-altitude role, which involved very short engagement times and high angular rates. The design was also adopted for use in the United States, where it was produced by Singer Corporation as the M5 Antiaircraft Director, later updated as the M5A1 ...