<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">oscilloscopes</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31398422</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:47:07</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dcterms:alternative xml:lang="en">oscilloscope</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ Devices in which the variations in a fluctuating electrical quantity appear temporarily as a visible wave form on a display screen. These plot the relationship between these variations, with the horizontal axis normally being a function of time and the vertical axis the voltage generated by an input signal. The German physicist Ferdinand Braun developed the first cathode-ray oscilloscope in 1897. In general, these are considered the same instrument as an oscilloscope, except that the oscillograph may be capable of creating a permanent record of measurements, while the oscilloscope provides only visual feedback. ]]></dc:description></metadata>