@prefix envthes: . @prefix skos: . @prefix owl: . @prefix dc: . @prefix xsd: . envthes: skos:prefLabel "EnvThes"@en ; a owl:Ontology, skos:ConceptScheme . envthes:21463 skos:prefLabel "derived property"@en ; a skos:Concept ; skos:narrower envthes:21540 . envthes:21540 skos:exactMatch , ; skos:definition "[SWEET] The rate of recurrence of any periodic phenomenon, often associated with waves of all kinds. Without qualification frequency often means temporal frequency, the rate of recurrence of a time-varying function, but could mean spatial frequency, the rate of recurrence of a space-varying function. Spatial frequency is the reciprocal of the repeat distance (sometimes the wavelength). The dimensions of (temporal) frequency are inverse time. A common unit for frequency is cycle per second, formerly abbreviated cps, but superseded by hertz, abbreviated as Hz."@en ; skos:broader envthes:21463 ; a skos:Concept ; dc:creator "herbert.schentz@umweltbundesamt.at"@en ; skos:prefLabel "frequency"@en ; skos:inScheme envthes: ; dc:modified "2018-07-02"^^xsd:date ; skos:altLabel "T-1"@en ; dc:created "2016-03-31"^^xsd:date .