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  2. Basic reproduction number - Wikipedia

    en.wikipedia.org/wiki/Basic_reproduction_number

    is the average number of people infected from one other person. For example, Ebola has an of two, so on average, a person who has Ebola will pass it on to two other people.. In epidemiology, the basic reproduction number, or basic reproductive number (sometimes called basic reproduction ratio or basic reproductive rate), denoted (pronounced R nought or R zero), [1] of an infection is the ...

  3. Radio occultation - Wikipedia

    en.wikipedia.org/wiki/Radio_occultation

    Radio occultation (RO) is a remote sensing technique used for measuring the physical properties of a planetary atmosphere or ring system. Satellites carrying onboard GNSS-Radio occultation instruments include CHAMP , GRACE and GRACE-FO , MetOp and the recently launched COSMIC-2 .

  4. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    By 1970, a calculator could be made using just a few chips of low power consumption, allowing portable models powered from rechargeable batteries. The first handheld calculator was a 1967 prototype called Cal Tech, whose development was led by Jack Kilby at Texas Instruments in a research project to produce a portable calculator. It could add ...

  5. Pro rata - Wikipedia

    en.wikipedia.org/wiki/Pro_rata

    Pro rata is an adverb or adjective meaning in equal portions or in proportion. [1] The term is used in many legal and economic contexts. The hyphenated spelling pro-rata for the adjective form is common, as recommended for adjectives by some English-language style guides. In American English, this term has been vernacularized to prorated or pro ...

  6. Forward osmosis - Wikipedia

    en.wikipedia.org/wiki/Forward_osmosis

    Simple PRO power generation scheme In 1954 Pattle [ 28 ] suggested that there was an untapped source of power when a river mixes with the sea, in terms of the lost osmotic pressure, however it was not until the mid ‘70s where a practical method of exploiting it using selectively permeable membranes by Loeb [ 29 ] and independently by Jellinek ...

  7. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Windows Calculator - Wikipedia

    en.wikipedia.org/wiki/Windows_Calculator

    A simple arithmetic calculator was first included with Windows 1.0. [5]In Windows 3.0, a scientific mode was added, which included exponents and roots, logarithms, factorial-based functions, trigonometry (supports radian, degree and gradians angles), base conversions (2, 8, 10, 16), logic operations, statistical functions such as single variable statistics and linear regression.

  9. Pro se legal representation (/ ˌ p r oʊ ˈ s iː / or / ˌ p r oʊ ˈ s eɪ /) means to argue on one's own behalf in a legal proceeding, as a defendant or plaintiff in civil cases, or a defendant in criminal cases, rather than have representation from counsel or an attorney. The term pro se comes from Latin pro se, meaning "for oneself" or ...