basâmad-e zaviye-yi (#)
Fr.: fréquence angulaire
The number of complete rotations per unit time, expressed in radian per second: ω = 2πν, where ν is the frequency (cycles per second).
angular kinetic energy
kâruž-e jonbeši-ye zâviye-yi
Fr.: énergie cinétique angulaier
Same as → rotational energy.
Fr.: moment angulaire, moment cinétique
angular momentum catastrophe
negunzâr-e jonbâk-e zâviye-yi
Fr.: catastrophe du moment angulaire
A problem encountered by the → cold dark matter model of galaxy formation. The model predicts too small systems lacking → angular momentum, in contrast to real, observed galaxies. → cusp problem; → missing dwarfs.
angular momentum parameter
pârâmun-e jonbâk-e zâviye-yi
Fr.: paramètre de moment angulaire
angular momentum problem
parâse-ye jonbâk-e zâviye-yi
Fr.: problème de moment angulaire
1) The fact that the Sun, which contains 99.9% of the mass of the
→ solar system, accounts for about 2% of the total
→ angular momentum of the solar system. The problem of outward
→ angular momentum transfer has been a main topic of interest for
models attempting to explain the origin of the solar system.
angular momentum transfer
tarâvaž-e jonbâk-e zâviye-yi
Fr.: transfert de moment angulaire
angular momentum transport
tarâbord-e jonbâk-e zâviye-yi
Fr.: transfert de moment angulaire
Same as → angular momentum transfer.
angular power spectrum
binâb-e tavâni-ye zâviye-yi
Fr.: spectre de puissance angulaire
Of the → cosmic microwave background radiation, a plot of how much the temperature varies from point to point on the sky versus the angular frequency. This spectrum answers fundamental questions about the nature of the Universe. → cosmic microwave background anisotropy; → dipole anisotropy.
Fr.: résolution angulaire
Of a telescope, the smallest angle betwwen two → point sources that produces distinct images. It depends on both the wavelength at which observations are made and on the diameter of the telescope. Same as → spatial resolution.
angular size distance
Fr.: distance angulaire
Same as → angular diameter distance.
Fr.: vitesse angulaire
A measure of the angular displacement per unit time. Of a particle traveling on a circular path or a rotating body, the ratio of the angle traversed to the amount of time it takes to traverse that angle: ω = dθ/dt. For a rigid body, all lines in it rotate through the same angle in the same time, and the angular velocity is the characteristic of the body as a whole. The angular velocity is related to the linear velocity by the equation v = rω, where r is the distance of the point from the rotation axis. → vector angular velocity.
Any living creature that is distinguished from plants by independent movement and responsive sense organs.
From L. animale "living being, being which breathes," neuter of animalis "animate, living; of the air," from anima "breath; soul; breeze," cognate with Pers. jân, as below.
Jânevar, jânvar, Mid.Pers. gyânwar "animal; animate," literally "living, alive; quick," from jân, Mid.Pers. (+ prefix *ui-) gyân "(breathing) soul," gyânig "spiritual, vital;" Av. viiānayā "spirit(ness)"; Proto-Iranian *HanH- "to breathe" cf. Skt. ani- "to breathe," aniti "breathes;" Gk. anemos "wind;" L. animus "soul, spirit," anima "breeze, breath, soul;" Goth. uz-anan "to exhale" (Cheung 2007) + -e epenthesis + -var possession suffix; also hen o hen "to pant;" dialects, e.g. Lori, Kurd., henâs, henâsa "breath," henowša "panting."
1) To give life to; make alive; make lively or vigorous; give motion to.
From L. animatus p.p. of animare "give breath to," also "to endow with a particular spirit, to give courage to," from anima "life, breath" L. animus "soul, spirit," anima "breeze, breath, soul;" Goth. uz-anan "to exhale;" Gk. anemos "wind;" PIE root *ane- "to blow, to breathe;" cognate with Pers. jân "vital spirit, soul, mind," as below.
Farhanidan, from far- perfection prefix + han variant of jân "vital spirit, soul;" hen o hen "to pant;" Lori, Kurd., henâs, henâsa "breath," henowša "panting;" Mid.Pers. (+ prefix *ui-) gyân "(breathing) soul," gyânig "spiritual, vital;" Av. viiānayā "spirit(ness);" Proto-Iranian *HanH- "to breathe" cf. Skt. ani- "to breathe," aniti "breathes;" Gk. and L., as above, + -idan infinitive suffix.
1) An act or instance of animating or enlivening;
the state or condition of being animated.
In an imaging system, the dependence of its performance on field angle. In other words, the spatial variability of the → point spread function for off-axis sources.
The departure from → isoplanicity.
Describing a medium in which certain physical properties are different in different directions.
anisotropic homogeneous cosmological model
model-e keyhânšenâxti-ye hamgen o nâ-izogard
Fr.: modèle cosmiologique homogène mais anisotrope