intermediate-mass black hole (IMBH)
siyah câl-e miyân jerm
Fr.: trou noir de masse intermédiaire
A → black hole with a mass in the range 102-104 solar masses. IMBHs may form as the result of multiple → mergers of smaller objects in the centers of dense stellar clusters in the present universe, assuming → mass loss from → stellar winds is not significant. They may also arise from the evolution of → very massive stars early in the history of the Universe, forming black hole "seeds" in the centers of massive halos (the precursors of the galaxies we see today) early in the history of the Universe, to redshifts z > 10. Currently the best observational evidence for IMBHs comes from models of ultraluminous X-ray sources (See, e.g., J. M. Centrella et al. 2010, astro-ph/1010.5260).
Fr.: protoétoile de masse intermédiare
A protostar that evolves into an → intermediate-mass star.
Fr.: étoile de masse intermédiare
A star whose mass lies in the range about 2 to 8 → solar masses approximately.
A property of a turbulent dynamical system which is characterized by chaotic, irregular behavior occurring between quiet (or less irregular) periods. In other words, a → turbulent flow having a large → Reynolds number undergoes a phenomenon in which its turbulent activity at a fixed location stops from time to time and starts again. In fact → turbulence never completely disappears, but it can become extremely weak interrupted irregularly by bursts of strong turbulence (see also → developed turbulence). For intermittent flows → probability density functions are not → Gaussian. Turbulent intermittency plays a fundamental role in fields ranging from combustion physics, chemical engineering, meteorology, to astrophysical systems, more specifically the → interstellar medium.
From L. intermittent, pr.p. of intermittere "to leave a space between, drop (for a while), leave off," from → inter- + mittere "to send, let go."
Raftomând, literally "to go and to stop," from raft past stem of raftan "to go, walk, proceed" (present stem row-); Mid.Pers. raftan, raw-, Proto-Iranian *rab/f- "to go; to attack") + -o- euphonic infix + mând past stem of mândan "to remain, stay, relinquish, leave" (Mid.Pers. mândan "to remain, stay," mân "house, home;" O.Pers. mān- "to remain, dwell;" Av. man- "to remain, dwell; to wait;" cf. Gk. menein "to remain;" L. manere "to stay, remain, abide," mansio "a staying, a remaining, night quarters, station" (Fr. maison, ménage; E. manor, mansion, permanent; PIE *men- "to remain, wait for").
Alternately ceasing and beginning again; adj. of → intermittency.
Adjective of → intermittency.
Fr.: courant intermittent
A unidirectional electric current that flows and ceases to flow at irregular or regular intervals.
Fr.: force intermoléculaire
A Force acting between molecules.
Situated or occurring in the interior of something; interior.
From M.L. internalis, from L. internus "within," from inter "between," → inter-.
Daruni, adj. of darun " in, into; within" (Mid.Pers. andarôn "inside," from andar, → inter-, + rôn "side, direction;" Av. ravan- "(course of a) river").
Fr.: absorption interne
Fr.: conversion interne
A → radiationless relaxation process in which a molecule in some excited → electronic state converts to a state of the same → multiplicity but of lower electronic energy and in which the lost electronic energy is converted initially into vibrational energy.
Fr.: énergie interne
The difference between the energy added to a system and the energy given up by the system in performing work.
internal gravity wave (IGW)
mowj-e gerâni-ye daruni
Fr.: onde de gravité interne
internal photoelectric effect
oskar-e šid-barqi-ye daruni
Fr.: effet photoélectrique interne
The → photoelectric effect whereby photons absorbed by a solid (→ semiconductor) raise electrons from a lower to a higher → energy level (from → valence band to → conduction band). See also → external photoelectric effect.
internal structure of stars
sâxtâr-e daruni-ye setâregân (#)
Fr.: structure interne des étoiles
The physical characteristics of that part of a star lying below the → photosphere. More specifically, the study of its various zones (→ core, → convective zone, → radiative zone) and the transfer of energy through them.
kâr-e daruni (#)
Fr.: travail interne
Work done in separating the molecules of a system against their forces of attraction. Its value is zero for an → ideal gas.
Verbal noun of → internalize.
1) To incorporate (the cultural values, mores, motives, etc., of another or of a group),
as through learning, socialization, or identification (Dictionary.com).
jahâni (#), andarnafâni
Fr.: international, mondial
International, from → inter- + nation, from O.Fr. nacion, from L. nationem (nom. natio) "nation, stock, race," literally "that which has been born," from natus, p.p. of nasci "be born;" cognate with Pers. zâdan→ generate, + → -al.
Jahâni "of or relating to the world" (Fr. mondial),
International Astronomical Union (IAU)
Yekâyeš-e Jahâni-ye Axtaršenâsi
Fr.: Union Astronomique Internationale (UAI)
An astronomical association of astronomers that is the controlling body of world astronomy. It was founded in Brussels in 1919.
International Atomic Time (TAI)
zamân-e atomi-ye jahâni (#)
Fr.: Temps Atomique International (TAI)
A weighted average of the time kept by about 200 caesium atomic clocks in over 50 national laboratories worldwide. It has been available since 1955, and became the international standard on which UTC is based on January 1972.