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  2. Rule of thumb - Wikipedia

    en.wikipedia.org/wiki/Rule_of_thumb

    Cartoon by James Gillray satirizing Sir Francis Buller, 1782: "Judge Thumb; or, Patent Sticks for Family Correction: Warranted Lawful!". A modern folk etymology [14] relates the phrase to domestic violence via an alleged rule under English common law which permitted wife-beating provided that the implement used was a rod or stick no thicker than a man's thumb. [6]

  3. Coherence time (communications systems) - Wikipedia

    en.wikipedia.org/wiki/Coherence_time...

    A popular rule of thumb for modern digital communications is to define the coherence time as the geometric mean of the two approximate values, also known as Clarke's model; from the maximum Doppler frequency we can obtain 50% coherence time [1] [2] =

  4. Detrended correspondence analysis - Wikipedia

    en.wikipedia.org/wiki/Detrended_correspondence...

    Detrended correspondence analysis (DCA) is a multivariate statistical technique widely used by ecologists to find the main factors or gradients in large, species-rich but usually sparse data matrices that typify ecological community data.

  5. Correspondence analysis - Wikipedia

    en.wikipedia.org/wiki/Correspondence_analysis

    Correspondence analysis (CA) is a multivariate statistical technique proposed [1] by Herman Otto Hartley (Hirschfeld) [2] and later developed by Jean-Paul Benzécri. [3] It is conceptually similar to principal component analysis, but applies to categorical rather than continuous data.

  6. Golden Rule - Wikipedia

    en.wikipedia.org/wiki/Golden_Rule

    "Golden Rule Sign" that hung above the door of the employees' entrance to the Acme Sucker Rod Factory in Toledo, Ohio, 1913. The Golden Rule is the principle of treating others as one would want to be treated by them. It is sometimes called an ethics of reciprocity, meaning that you should reciprocate to others how you would like them to treat ...

  7. Queuing Rule of Thumb - Wikipedia

    en.wikipedia.org/wiki/Queuing_Rule_of_Thumb

    The Queuing Rule of Thumb (QROT) is a mathematical formula known as the queuing constraint equation when it is used to find an approximation of servers required to service a queue. The formula is written as an inequality relating the number of servers ( s ), total number of service requestors ( N ), service time ( r ), and the maximum time to ...

  8. T–V distinction in the world's languages - Wikipedia

    en.wikipedia.org/wiki/T–V_distinction_in_the...

    A good rule of thumb is that singular accompanies first names and plural accompanies surnames with title (Mr, Mrs, etc.). Exceptions are rare, for example younger schoolchildren may address their teacher in the plural, title and first name, or an officer may address a soldier in the singular and surname. The sequence singular–title–surname ...

  9. Righthand head rule - Wikipedia

    en.wikipedia.org/wiki/Righthand_head_rule

    According to the righthand head rule, this is of course the righthand element. For instance, the word 'person' is a noun, but if the suffix '-al' were added then 'personal' is derived. 'Personal' is an adjective, and the righthand head rule holds that the PoS information is provided by the suffix '-al', which is the righthand element.