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Number of Results: 1965 Search : ion

dilution factor karvand-e owtâleš Fr.: facteur de dilution The energy density of a radiation field divided by the equilibrium value for the same color temperature. |

dimension vâmun Fr.: dimension 1) From L.
âz "test, trial,"
munpey "measuring, agreement," mânpey
"a measure; a cup, bowl"), from O.Pers./Av. mânémā(y)- "to measure;"
PIE base *me- "to measure;" cf. Skt. mati "measures," matra-
"measure;" Gk. metron "measure;" L. metrum. |

dimensional vâmuni Fr.: dimensionnel Of or pertaining to → |

dimensional analysis ânâlas-e vâmuni, ânâkâvi-ye ~ Fr.: analyse dimensionnelle A technique used in physics based on the fact that the various terms in a
physical equation must have identical → → |

dimensional formula disul-e vâmuni Fr.: formule dimensionnelle Symbolic representation of the definition of a physical quantity obtained from
its units of measurement. For example, with → |

dimensionless bivâmun Fr.: sans dimension A physical quantity or number lacking units. |

dimensionless quantity candâ-ye bivâmun Fr.: quantité sans dimension A quantity without an associated → → quantity. |

Dione (Saturn IV) Dioné Fr.: Dioné The fourth largest moon of Saturn and the second densest after Titan. Its diameter is 1,120 km and its orbit 377,400 km from Saturn. It is composed primarily of water ice but must have a considerable fraction of denser material like silicate rock. Discovered in 1684 by Jean-Dominique Cassini, Italian born French astronomer (1625-1712). In Gk. mythology Dione was the mother of Aphrodite (Venus) by Zeus (Jupiter). |

dipole radiation tâbeš-e doqotbé Fr.: rayonnement dipolaire The electromagnetic radiation produced by an oscillating
→ |

Dirac annihilation nâbudi-ye Dirac Fr.: annihilation de Dirac Same as → → |

Dirac equation hamugeš-e Dirâk Fr.: équation de Dirac The equation that describes the behavior of an
→ |

Dirac function karyâ-ye Dirâk Fr.: fonction de Dirac A function of x = -∞ to x = +∞ equal to unity. |

direct correlation hambâzâneš-e sarrâst Fr.: corrélation directe A correlation between two variables such that as one variable becomes large, the other also becomes large, and vice versa. The correlation coefficient is between 0 and +1. Also called positive correlation. → |

direct motion jonb eš-e farârow, ~ sarrâst Fr.: mouvement direct The motion of a solar system body from West to East across the sky against the
background stars. It is the "normal" direction of motion within the solar system.
For rotating or orbiting solar system objects it is anti-clockwise as seen from
above the solar system in the direction of the North Pole. The same as
→ |

direction 1) râstâ, su (#); 2) râštâri Fr.: direction 1) A position to which motion or another position is referred. M.E. 1) |

direction angle zâviye-ye râstâ Fr.: angle de direction An angle made by a given vector and a coordinate axis. |

Dirichlet condition butâr-e Dirichlet Fr.: condition de Dirichlet One of the following conditions for a → Named after Peter Gustav Lejeune Dirichlet (1805-1859), German mathematician who
made valuable contributions to → |

disallocation vâtesk Fr.: desallouation The act of disallocating or the state of being disallocated. |

discrete absorption component (DAC) hamne-ye daršami-ye gosasté Fr.: composante d'absorption discrète The rapid, systematic changes in the absorption parts of the
→ → |

discrete transition gozareš-e gosasté Fr.: transition discrète A transition between two quantum-mechanical energy levels.
See also → → |

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