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  2. Help:Footnotes - Wikipedia

    en.wikipedia.org/wiki/Help:Footnotes

    When using {} or <references />, the list can be split into columns. The <references /> tag provides a default column width of 30 em. {} can be used to set a different column width: {{Reflist|xxem}}, where xx is the column width in em. The number of columns will automatically be adjusted to the width of the display.

  3. Substitution cipher - Wikipedia

    en.wikipedia.org/wiki/Substitution_cipher

    t. e. In cryptography, a substitution cipher is a method of encrypting in which units of plaintext are replaced with the ciphertext, in a defined manner, with the help of a key; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by ...

  4. Wikipedia:Citing sources - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Citing_sources

    A general reference is a citation to a reliable source that supports content, but is not linked to any particular text in the article through an inline citation. General references are usually listed at the end of the article in a "References" section, and are usually sorted by the last name of the author or the editor.

  5. Help:Referencing for beginners - Wikipedia

    en.wikipedia.org/wiki/Help:Referencing_for_beginners

    Manually adding references can be a slow and tricky process. Fortunately, there is a tool called "RefToolbar" built into the Wikipedia edit window, which makes it much easier. To use it, click on Cite at the top of the edit window, having already positioned your cursor after the sentence or fact you wish to reference.

  6. APA style - Wikipedia

    en.wikipedia.org/wiki/APA_style

    v. t. e. APA style (also known as APA format) is a writing style and format for academic documents such as scholarly journal articles and books. It is commonly used for citing sources within the field of behavioral and social sciences, including sociology, education, nursing, criminal justice, anthropology, and psychology.

  7. Frequency mixer - Wikipedia

    en.wikipedia.org/wiki/Frequency_mixer

    Frequency mixer. In electronics, a mixer, or frequency mixer, is an electrical circuit that creates new frequencies from two signals applied to it. In its most common application, two signals are applied to a mixer, and it produces new signals at the sum and difference of the original frequencies. Other frequency components may also be produced ...

  8. Scientists strengthen concrete by 30 percent with used coffee ...

    www.engadget.com/scientists-strengthen-concrete...

    Coffee grounds can't simply be mixed in raw with standard concrete as they won't bind with the other materials due to their organic content, Dr. Roychand explained.

  9. Mixed model - Wikipedia

    en.wikipedia.org/wiki/Mixed_model

    A mixed model, mixed-effects model or mixed error-component model is a statistical model containing both fixed effects and random effects. [ 1][ 2] These models are useful in a wide variety of disciplines in the physical, biological and social sciences. They are particularly useful in settings where repeated measurements are made on the same ...