1) To conceive of or represent as a person or as having human qualities or powers.
A body of persons employed in an organization or place of work (Dictionary.com).
From Fr. personnel (as contrasted with matériel), from O.Fr. personel, → personal.
Tanumgân, from tanum, → personal, + -gân multiplicity suffix.
1) pargâsmandi, pargâsik; 2) pargâsmand, pargâsik
1) The technique or art of drawing three-dimensional objects on a flat surface so that
to give the right impression of their relative sizes and distances. A drawing so made.
From M.Fr. perspective, from M.L. (ars) perspectiva "science of optics," from feminine of perspectivus "of sight, optical" from L. perspectus, p.p. of perspicere "to inspect, look through," from → per- "through" + specere "to look at," → prospect.
O.Fr. perturber, from L. perturbare "to confuse, disorder, disturb," from per- "through" + turbare "disturb, confuse," from turba "turmoil, crowd," turbidus "muddy, full of confusion."
Parturidan, from par-, related to pirâ- (cf. Av. per- "to pass across, through") + turidan "to run away, be very much ashamed," tur "withdrawal, flight;" Lori, Laki tur "restive, disobedient," Laki turyâyen "to get angry, lose one's temper," probably cognate with L. turba, as above.
1) Any departure introduced into a steady state of a system.
The magnitude is often assumed to be small so
that the resulting terms in the dependent variables may be neglected.
The term "perturbation" is therefore sometimes used as synonymous with "small perturbation."
Verbal noun of → perturb.
Fr.: équation de perturbation
Any equation governing the behavior of a → perturbation.
Fr.: méthode de perturbation
Approximate method of solving a difficult problem if the equations to be solved depart only slightly from those of a problem already solved.
Fr.: corps perturbateur
A celestial body that causes a perturbation in the orbit of another body.
A technique in spectroscopy which uses a combination of several dispersive elements (prisms in series or a grism) before focusing the light on the primary disperser, usually a grating, in order to achieve high spectral resolutions.
Fr.: période de précession
The interval with which a rotating body precesses. The precession period of the Earth is 25,770 years. For a → spinning top it is given by: Tp = (4π2I)/(mgrTs), where I is the → moment of inertia, m the mass of the top, g gravity, r the distance between the center of mass and the contact point, and Ts is the spinning period of the top.
primordial curvature perturbation
partureš-e xamidegi-ye bonâqâzin
Fr.: perturbation de courbure primordiale
In cosmological models, the phenomenon that is supposed to seed the → cosmic microwave background anisotropies and the structure formation of the Universe.
prompt supernova explosion
oskaft-e tond-e abar-now-axtar, ~ biderang-e ~
Fr.: explosion rapide de supernova
A mechanism predicted by theoretical models of → supernova explosion in the case when the → supernova shock breaks through the outer edge of the collapsing → iron core before losing all of its energy (through → photodisintegration of the iron nuclei) and manages to expel the stellar envelope. Compare with → delayed supernova explosion.
M.E., from O.Fr. propre, from L. proprius "one's own."
Saré "pure; principal."
Fr.: distance propre
A distance between two nearby events in the frame in which they occur at the same time. It is the distance measured by a ruler at the time of observation. Hence, for a cosmological time t, Dproper = DC . a(t), where DC is the → comoving distance, and a(t) is the → scale factor. In the present epoch a = a(tobs) = 1, and Dproper = DC.
Fr.: masse propre
Same as → rest mass.
Fr.: mouvement propre
The apparent motion of a star across the sky (not including a star's parallax), arising from the star's velocity through space with respect to the Sun. Proper motion is usually tabulated in star catalogs as changes in right ascension and declination per year or century. See also: → proper motion distance.
proper motion distance
durâ-ye jonbeš-e saré
Fr.: distance mouvement propre
The distance derived from the → proper motion of an object. If an object has a known → transverse velocity u, and has an observed angular motion of dθ/dt, then the proper motion distance is defined as: d = u/(dθ/dt).
Fr.: sous-ensemble propre
Of two sets A and B, the set A if it is contained in B (A ⊂ B) but is not equal to B (A ≠ B).
zamân-e saré (#)
Fr.: temps propre
In general relativity, the time as measured on a clock that travels with the observer in the same system. An accelerated clock will measure shorter time intervals between events than a non-accelerated clock between the same events. → twin paradox.
1) General: An essential or distinctive attribute or quality of
From M.E. propriete "ownership, something owned, one's own nature," from M.Fr. propriété, from L. proprietas "ownership, property, propriety," literally "special character," noun of quality from proprius "one's own, special."
Dârâk "thing owned," from dâr present stem of dâštan "to have, to possess" + -âk (on the model of xorâk, pušâk, kâvâk). The first element dâštan, from Mid.Pers. dâštan, O.Pers./Av. root dar- "to hold, keep back, maintain, keep in mind;" Skt. dhr- "to to hold, keep, preserve," dharma- "law;" Gk. thronos "elevated seat, throne;" L. firmus "firm, stable;" Lith. daryti "to make;" PIE *dher- "to hold, support."