"directivity" meaning in English

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  "etymology_text": "From directive + -ity.",
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        "A measure of the performance of an antenna compared to an isotropic antenna; the ratio of the maximum value of radiation intensity to the average radiation intensity."
      ],
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          "isotropic"
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          "ratio",
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        "(physics, electrical engineering) A measure of the performance of an antenna compared to an isotropic antenna; the ratio of the maximum value of radiation intensity to the average radiation intensity."
      ],
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        "electricity",
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        "energy",
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        "natural-sciences",
        "physical-sciences",
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        "Anisotropy in the propagation of earthquake waves in the direction of rupture."
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          "Anisotropy",
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          "propagation",
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        "(geology) Anisotropy in the propagation of earthquake waves in the direction of rupture."
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        "geography",
        "geology",
        "natural-sciences"
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      "examples": [
        {
          "text": "1991, COSPAR. Plenary Meeting, Jean-Louis Fellous, COSPAR., Global change and relevant space observations: proceedings of Symposium 1 of the COSPAR twenty-eighth Plenary Meeting held in The Hague, the Netherlands, 25 June-6 July 1990, Pergamon\nFor higher degrees, the spatial integration tends to produce a cancellation and a rapid loss of visibility, although less rapidly for velocity measurement than for luminosity measurement, on account of the directivity of the velocity vector."
        },
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          "ref": "2012, Russell J. Donnelly, Katepalli R. Streenivasan, Flow at Ultra-High Reynolds and Rayleigh Numbers: A Status Report, Springer Science & Business Media, →ISBN, page 337:",
          "text": "First we renounced the directivity of the velocity measurement by using a hot point whose size is of order of the wire diameter [4]. Numerical simulations have shown that the probe then measures the velocity modulus [5].",
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          "text": "2014, Oris, Interaction of Information and Energy as the Primary Cause for origination of the Creative Activity of Self-Consciousness Focus and the Macrocosmos in whole, Ayfaar Foundation Inc. →ISBN\nThat is, in order to begin to function synchronously in a new manifestation mode ( to drastically change the vector directivity of the Focus Dynamics), Formo- Creators of billions of particles must “die”:"
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        "Directionality"
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        "(rare) Directionality"
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    "directivity"
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        "(physics, electrical engineering) A measure of the performance of an antenna compared to an isotropic antenna; the ratio of the maximum value of radiation intensity to the average radiation intensity."
      ],
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        "countable",
        "uncountable"
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        },
        {
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        },
        {
          "text": "2014, Oris, Interaction of Information and Energy as the Primary Cause for origination of the Creative Activity of Self-Consciousness Focus and the Macrocosmos in whole, Ayfaar Foundation Inc. →ISBN\nThat is, in order to begin to function synchronously in a new manifestation mode ( to drastically change the vector directivity of the Focus Dynamics), Formo- Creators of billions of particles must “die”:"
        }
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