nemunân-e a bi-varak
Fr.: échantillon non biaisé
A sample in which every individual element in the population has an equal chance of being selected.
Fr.: modèle non blanketé
Fr.: non lié
Fr.: charge non liée
Same as → free charge.
Fr.: amas non lié
A cluster of objects, such as stars or galaxies, in which the members are not tied together gravitationally. In such a cluster the members scatter through space following different directions. → bound cluster.
Fr.: système non lié
An association of bodies which are not gravitationally tied together.
unbound young stellar system (UYSS)
râžmân-e setâre-yi-ye javân-e nâbandidé
Fr.: système stellaire jeune non lié
A class of gravitationally loose stellar conglomerate with a notable apparent shape making it different from typical → bound → star clusters. The UYSS class includes a large range of objects, which extend at various size scales and at various degrees of self-binding; from small (semi-)compact → unbound systems named → stellar associations, to huge extended superstructures of → massive stars that make up whole parts of Galactic → spiral arms, known as → stellar complexes (Gouliermis, D. A., 2018, PASP 130:072001; arXiv:1806.11541).
Fr.: fonction non bornée
The function y = f(x) in a given range of the argument x if there is no number M such that for all values of x in the range under consideration the inequality | f(x) | ≤ M will be fulfilled. → bounded function.
The state of being uncertain; unpredictability; indeterminacy. → uncertainty principle.
Fr.: principe d'incertitude
A quantum mechanical principle due to Werner Heisenberg which states that the position and momentum of a particle cannot be determined simultaneously with any arbitrary accuracy. These quantities can be determined only with accuracies limited by the relation Δx.Δp ≥ (1/2)ħ, where Δx is the error in the determination of the position and Δp is the error in the momentum. A similar relation holds for the energy of a particle and the time, ΔE.Δt ≥ (1/2)ħ. Same as → Heisenberg uncertainty principle.
unclassified B[e] star (unclB[e])
setâre-ye B[e]-ye bi radé
Fr.: étoile B[e] non-classée
A temporary designation for a → B[e] star that cannot be placed in any of the four known classes.
Fr.: non clair
Difficult to see, hear, understand, or to be sure about.
Not limited by conditions; absolute.
Fr.: non conscient
Not awake and aware; not responding to one's environment.
Fr.: non conscience
A dune on a planetary surface, used in plural form undae.
From L. unda "wave," cognate with → water.
Šen-tal, from šen "sand" + tal "hill, heap."
Fr.: sous-, faible
A prefixal use of under, as to indicate place or situation below or beneath. Contrary to → over-.
M.E., from O.E. (cf. O.H.G. untar, Ger. unter, Goth. undar), from PIE *ndhero- "lower;" cf. Av. aδara- (adj.), aδairi- (prep.) "below;" Mid.Pers. êr "below, down; low, under," adar "low," azêr "below, under" (Mod.Pers. zir "below, down"); Skt. ádhara- "lower;" O.E. under "under, among").
Kam- "little, few; deficient, wanting; scarce" (Mid.Pers. kam "little, small, few," O.Pers./Av. kamna- "small, few").
The abundance of a chemical element being lower than a reference value, in particular compared to that of the Sun.
Fr.: amortissement faible
The behavior of a damped system when the amount of damping is weak so that the system oscillates with the amplitude gradually decreasing to zero. → overdamping.
1) kam-baravardan; 2) kam-baravard
Fr.: 1) sous-estimer; 2) sous-estimation
1) To estimate at too low a value, rate, or the like.