Fr.: ansatz de Bethe
Fr.: étoile BHB
Same as → blue horizontal branch star.
Prefix denoting "two, both, twice."
From L. bi-, cognate of Gk. di-, O.E. twi-; cf. Av. bi- "two," biš "twice," Mod.Pers. do "two," PIE *dwo- "two."
Do, Mid.Pers. do, Av. dva-, Skt. dvi-, Gk. duo, L. duo, E. two, Ger. zwei, Fr. deux.
Bianchi cosmological model
model-e keyhânšenâxti-ye Bianchi
Fr.: modèle cosmologique de Bianchi
A cosmological model based on the theory of → general relativity, which is homogeneous but → anisotropic. There are actually ten dinstinct Bianchi types, classified according to the particular kinds of symmetry they posses.
1) varak; 2) pištaneš; 3) varak dâdan
Fr.: 1, 2) biais; 3) biaiser
Leaning of the mind toward or away from something; especially:
a personal and sometimes unreasoned judgment.
From M.Fr. biais "slant," perhaps ultimately from Gk. epikarsios "slanting, oblique," from epi- "upon" + karsios "oblique."
Varak, from var "side, direction"
+ -ak suffix denoting relation, affinity, similarity
(as in dastak, poštak, pašmak, xarak,
nâxonak, mušak, eynak).
Note also var in yekvar "slanting, inclined".
irang-e varak, xatâ-ye ~
Fr.: erreur de biais
A measurement error that remains constant in magnitude for all observations; for example an incorrectly set zero adjustment.
nurdâd barây-e varak
Fr.: pose pour biais
CCD frame with exposure time set to zero and giving the bias level.
Fr.: voltage de biais
A voltage applied or developed between two electrodes as a bias.
Marked by or exhibiting bias; characterized by settled and often prejudiced outlook.
Biased, from → bias + adj. suffix -ed.
Varakdâr, from varak, → bias + -dâr "possessing, having," from dâštan "to possess, to have."
Fr.: estimation biasiée
Of a population parameter, if the mean or expectation of the statistics is not equal to the parameter.
biased galaxy formation
diseš-e varakdâr-e kahkašânhâ
Fr.: formation biaisée de galaxies
The theory that bright galaxies form preferentially from anomalously overdense perturbations in the → early Universe.
Fr.: échantillon biaisé
Fr.: statistique biasée
A statistics based on a → biased sample.
Fr.: cristal biaxe
A birefrigent crystal, such as mica, that is characterized by having two optical axes along which light is propagated with equal velocities.
A → microwave → polarimeter designed specifically to target the → B-mode signature of → inflation in the → cosmic microwave background polarization. BICEP2 observed from the South Pole for three seasons from 2010 to 2012. This 26 cm aperture → telescope comprised an all-cold refracting optical system equipped with a → bolometer array of 512 → detectors (256 pixels) operating at 150 GHz.
BICEP2, the upgraded version of the first BICEP, short for Background Imaging of Cosmic Extragalactic Polarization.
Fr.: lentille biconcave
Describing a lens with two concave faces.
Fr.: lentille biconvexe
A spherical lens with two convex faces. The radii of curvature for the two surfaces may or may not be the same.
Fr.: comète de Biela
A comet having a short period of 6.62 years discovered by Biela. It broke up on its 1846 return and subsequently gave rise to a spectacular meteor shower.
In honor of Wilhelm von Biela (1782-1856), Austrian military officer and amateur astronomer, who re-discovered the comet Biela in 1826, although it had been seen first in 1772. → comet.
Bielids, From Biel(a) + → -ids suffix denoting "descendant of, belonging to the family of."