@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:Activity
  a qudt:QuantityKind ;
  dcterms:description """
  $\\textit{Activity}$ is the number of decays per unit time of a radioactive sample,
   the term used to characterise the number of nuclei which disintegrate in a radioactive substance per unit time. 
  Activity is usually measured in Becquerels ($Bq$), where 1 $Bq$ is 1 disintegration per second,
   in honor of the scientist Henri Becquerel.
  """^^qudt:LatexString ;
  qudt:applicableUnit unit:BQ ;
  qudt:applicableUnit unit:CI ;
  qudt:applicableUnit unit:GigaBQ ;
  qudt:applicableUnit unit:KiloBQ ;
  qudt:applicableUnit unit:KiloCI ;
  qudt:applicableUnit unit:MegaBQ ;
  qudt:applicableUnit unit:MicroBQ ;
  qudt:applicableUnit unit:MicroCI ;
  qudt:applicableUnit unit:MilliBQ ;
  qudt:applicableUnit unit:MilliCI ;
  qudt:applicableUnit unit:NanoBQ ;
  qudt:applicableUnit unit:PetaBQ ;
  qudt:applicableUnit unit:PicoCI ;
  qudt:applicableUnit unit:TeraBQ ;
  qudt:dbpediaMatch "http://dbpedia.org/resource/Radioactive_decay"^^xsd:anyURI ;
  qudt:hasDimensionVector qkdv:A0E0L0I0M0H0T-1D0 ;
  qudt:informativeReference "https://en.wikipedia.org/wiki/Radioactive_decay#Radioactive_decay_rates"^^xsd:anyURI ;
  qudt:informativeReference "https://en.wikipedia.org/wiki/Radioactive_decay"^^xsd:anyURI ;
  qudt:isoNormativeReference "http://www.iso.org/iso/catalogue_detail?csnumber=31895"^^xsd:anyURI ;
  qudt:latexDefinition """
  Variation $dN$ of number of nuclei $N$ in a particular energy state, 
   in a sample of a radionuclide, due to spontaneous nuclear transitions from this state during an infinitesimal time interval, 
   divided by its duration $dt$; thus: activity $A = -\\frac{dN}{dt}$.
  """^^qudt:LatexString ;
  qudt:siExactMatch si-quantity:ARRN ;
  qudt:symbol "A" ;
  qudt:wikidataMatch <http://www.wikidata.org/entity/Q317949> ;
  rdfs:comment "Applicable units are those of quantitykind:Activity" ;
  rdfs:isDefinedBy <http://qudt.org/3.2.1/vocab/quantitykind> ;
  rdfs:label "Activity"@en ;
  skos:broader quantitykind:StochasticProcess .