ratio logarithm (Np)

{
  "id": "NISTq121",
  "unitsml_id": "q:logarithmic_decrement",
  "name": "ratio logarithm (Np)",
  "names": [
    {
      "value": "ratio logarithm (Np)",
      "lang": "en"
    },
    {
      "value": "logarithmic decrement (field quantities using natural logarithms)",
      "lang": "en"
    },
    {
      "value": "logarithme d'un rapport (Np)",
      "lang": "fr"
    }
  ],
  "short": "logarithmic_decrement",
  "type": "derived",
  "dimension": {
    "id": "NISTd67",
    "name": "logarithmic ratio",
    "expression": "1",
    "components": [],
    "dimensionless": true
  },
  "units": [
    {
      "id": "NISTu153",
      "name": "neper",
      "symbol": "Np"
    },
    {
      "id": "NISTu61",
      "name": "one",
      "symbol": "1"
    }
  ],
  "unit_count": 2,
  "identifiers": [
    {
      "type": "nist",
      "id": "NISTq121"
    },
    {
      "type": "unitsml",
      "id": "q:logarithmic_decrement"
    }
  ],
  "references": [
    {
      "type": "normative",
      "authority": "si-digital-framework",
      "uri": "http://si-digital-framework.org/quantities/RLGN"
    }
  ]
}