@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix constant: <http://qudt.org/vocab/constant/> .
@prefix dc: <http://purl.org/dc/elements/1.1/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix prov: <http://www.w3.org/ns/prov#> .
@prefix qkdv: <http://qudt.org/vocab/dimensionvector/> .
@prefix quantitykind: <http://qudt.org/vocab/quantitykind/> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix si-quantity: <https://si-digital-framework.org/quantities/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix unit: <http://qudt.org/vocab/unit/> .
@prefix vaem: <http://www.linkedmodel.org/schema/vaem#> .
@prefix voag: <http://voag.linkedmodel.org/schema/voag#> .

quantitykind:PhotoThresholdOfAwarenessFunction
  a qudt:QuantityKind ;
  dcterms:description """"Photo Threshold of Awareness Function" is the smallest amount of light the human eye can detect for a
    stimulus subtending a $1^o$ radial angle at the eye. Because detection is governed by temporal summation (Bloch's law), within
    the critical duration the threshold is reached when luminous energy — luminance integrated over time — attains a constant
    value, so the quantity is expressed as a luminous energy (lumen second). Where the presentation duration is instead held
    fixed, the same threshold may be reported as a light level, i.e. a luminance (candela per square metre) or illuminance (lux).
  """^^qudt:LatexString ;
  qudt:applicableUnit unit:LM-HR ;
  qudt:applicableUnit unit:LM-SEC ;
  qudt:hasDimensionVector qkdv:A0E0L0I1M0H0T1D0 ;
  qudt:informativeReference "https://www.britannica.com/science/human-eye/Colour-vision"^^xsd:anyURI ;
  qudt:isoNormativeReference "http://www.iso.org/iso/catalogue_detail?csnumber=43012"^^xsd:anyURI ;
  qudt:plainTextDescription """"Photo Threshold of Awareness Function" is the smallest amount of light the human eye can detect for
    a stimulus subtending a 1° radial angle at the eye. Because detection is governed by temporal summation (Bloch's law), within
    the critical duration the threshold is reached when luminous energy — luminance integrated over time — attains a constant
    value, so the quantity is expressed as a luminous energy (lumen second). Where the presentation duration is instead held
    fixed, the same threshold may be reported as a light level, i.e. a luminance (candela per square metre) or illuminance (lux).
  """ ;
  qudt:specializationOf quantitykind:LuminousEnergy ;
  qudt:specializationOf quantitykind:QuantityOfLight ;
  rdfs:comment "Applicable units are those of quantitykind:LuminousEnergy" ;
  rdfs:comment "Applicable units are those of quantitykind:QuantityOfLight" ;
  rdfs:isDefinedBy <http://qudt.org/3.5.0/vocab/quantitykind> ;
  rdfs:label "Photo Threshold of Awareness Function"@en ;
  rdfs:seeAlso quantitykind:Illuminance ;
  rdfs:seeAlso quantitykind:Luminance ;
  skos:broader quantitykind:LuminousEnergy ;
  skos:broader quantitykind:QuantityOfLight .