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positional notation nemâdgân-e neheši Fr.: notation positionnelle A system of representing → numbers in which the → position of a → digit in a string of digits affects its value. The decimal system is a positional notation for expressing numbers. Same as → place-value notation and → positional number system. → positional; → notation. |
positional number system râžmân-e adadi-ye neheši Fr.: système de numération positionnel A → number system in which the value of each digit is determined by which place it appears in the full number. The lowest place value is the rightmost position, and each successive position to the left has a higher place value. In the → number system conversion, the rightmost position represents the "ones" column, the next position represents the "tens" column, the next position represents "hundreds", etc. The values of each position correspond to powers of the → base of the number system. For example, in the usual decimal number system, which uses base 10, the place values correspond to powers of 10. Same as → place-value notation and → positional notation. See also → number system conversion. → positional; → number; → system. |
positioning nehešdâd Fr.: positionnement The act or process of putting in a particular position or determining the psition of. |
positive dâhidâr Fr.: positif 1) General: Explicitly stated, stipulated, or expressed. M.E., from O.Fr. positif, from L. positivus "placed, settled; positive" (opposed to naturalis "natural"), from posit-, from positus "placed, put," p.p. of ponere "to put, place, set" + -ivus a suffix of adjectives. Dâhidâr, from dâhid- + -âr. The first component is the past stem of *dâhidan "to put, create, determine," variant of dehidan, dâdan "to give;" from Mid.Pers. dâdan, dahidan "to give; to create;" O.Pers. dā- "to give, grant, yield;" Av. dā- "to give, grant; put; create; determine;" dāhi "he would give/put" (single second person, subjunctive transitive), dadāiti "he gives;" cf. Skt. dadáti "he gives;" Gk. tithenai "to place, put, set," didomi "I give;" L. dare "to give, offer," facere "to do, to make;" Rus. delat' "to do;" O.H.G. tuon, Ger. tun, O.E. don "to do;" PIE base *dhe- "to put, to do." The second component -âr, accusative suffix; on the model of gereftâr "captive, involved (in trouble)," didâr "exposed to view." |
positive charge bâr-e dâhidâr Fr.: charge positive A charge having sign opposite to that of the electron. |
positive correlation hambâzâneš-e dâhidâr Fr.: correlation positive Same as → direct correlation. → positive; → correlation. |
positive feedback bâzxord-e dâhidâr Fr.: rétroaction positive A → feedback process in which the → output reacts on the → input so as to increase the initial → effect. |
positive skewness kažâli-ye dâhidâr Fr.: asymétrie positive Of a distribution function, a skewness in which the right tail (tail at the large end of the distribution) is more pronounced than the left tail (tail at small end of the distribution). → negative skewness. |
positiveness dâhidâri Fr.: positivité The quality or state of being positive; positivity. |
positivism dâhidârbâvari Fr.: positivisme Any doctrine that excludes a priori affirmations and admits only positive truth, i.e. factual knowledge gained through observation. From Fr. positivisme, from positif, → positive, in its philosophical sense of "imposed on the mind by experience;" → -ism. |
positron pozitron Fr.: positron The antiparticle of the electron, which has the same mass, spin, and charge as the electron, but the charge is positive. Positrons may be generated by radioactive decay or by pair production from energetic gamma photons. |
positronium pozitroniom Fr.: positronium A short-lived bound state of a positron and an electron. From → positron + -ium (as in barium, titanium), from N.L., from L. neuter suffix. |
possibility šodanigi Fr.: possibilité The state or fact of being possible. Something possible. M.E. possibilite, from L.L. possibilitas, → possible + → -ity. |
possible šodani (#) Fr.: possible 1) Capable of happening or likely to happen in the future. M.E., from L. possibilis "that may be done," from posse "to be able" + -ibilis "-able." Šodani "possible, practicable," from šodan "to become, to be, to be doing, to go, to pass," from Mid.Pers. šudan, šaw- "to go;" Av. š(ii)auu-, šiyav- "to move, go," šiyavati "goes," šyaoθna- "activity; action; doing, working;" O.Pers. šiyav- "to go forth, set," ašiyavam "I set forth;" cf. Skt. cyu- "to move to and fro, shake about; to stir," cyávate "stirs himself, goes;" Gk. kinein "to move;" Goth. haitan "call, be called;" O.E. hatan "command, call;" PIE base *kei- "to move to and fro." |
post 1) barnemâ; 2) barnemudan, bernemâ kardan Fr.: 1) affiche; 2) afficher 1a) An online message that is submitted to a message board or electronic mailing list. M.E., from O.E. post "pillar, doorpost," and O.Fr. post "post, upright beam," both from L. postis "post, doorpost." Barnemâ, literally "display, show off," from bar- "on; up; upon; in," → on-, + nemâ, present stem of nemudan "to show," → display. |
post- pasâ- (#), pas- (#) Fr.: post- A prefix, meaning "behind, after, later, subsequent to, posterior to." From L. post (adverb and preposition) "behind, after, afterward," cognate with Gk. (Arcadian and Cyprian dialects) pos "toward, on, at;" Skt. paśca "behind, after, later." Pasâ-, from pas "behind" (e.g.: pas-e pardé "behind the curtain"), variant pošt "back; the back; behind;" Mid.Pers. pas "behind, before, after;" O.Pers. pasā "after;" Av. pasca "behind (of space); then, afterward (of time);" cf. Skt. paścā "behind, after, later;" L. post, as above; O.C.S. po "behind, after;" Lith. pas "at, by;" PIE *pos-, *posko-. |
post-asymptotic giant branch star (post-AGB) setâre-ye pasâ-šâxe-ye qulân-e nâhamsâvi Fr.: étoile post-asymptotique A star in a short-lived evolutionary stage evolving from the → asymptotic giant branch toward higher → effective temperatures. The majority of low and intermediate mass stars (1 to 8 → solar masses) are believed to pass through this stage on their way to becoming → planetary nebulae. → post-; → asymptotic giant branch. |
post-main sequence star setâre-ye pasâ-rešte-ye farist Fr.: étoile post séquence principale A star that has evolved off the → main sequence. → post-; → main sequence; → star. |
post-Newtonian expansion gostareš-e pasâ-Newtoni Fr.: développement post-newtinien |
post-Newtonian formalism disegerâyi-ye pasâ-Newtoni Fr.: formalisme post-newtonien An approximate version of → general relativity that applies when the → gravitational field is → weak, and the matter → velocity is → small. Post-Newtonian formalism successfully describes the gravitational field of the solar system. It can also be applied to situations involving compact bodies with strong internal gravity, provided that the mutual gravity between bodies is weak. It also provides a foundation to calculate the → gravitational waves emitted by → compact binary star systems, as well as their orbital evolution under radiative losses. The formalism proceeds from the Newtonian description and then, step by step, adds correction terms that take into account the effects of general relativity. The correction terms are ordered in a systematic way (from the largest effects to the smallest ones), and the progression of ever smaller corrections is called the → post-Newtonian expansion. |
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