{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.propagation","code":"thing-propagation","url":"https://ver.cy/models/thing/propagation/","name":"propagation","alternateNames":["red shift","redshift","wave front"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"noun.phenomenon","plane":"PHY","domain":["PHY.FLW"],"industry":[],"navPath":"","tags":[],"facets":{"substance":"energy","origin":"natural","agency":"inert","mobility":"not-applicable","scale":"not-applicable","affordances":["observable"]}},"whatItIs":"The movement of a wave through a medium or space, such as light, sound, radio or seismic waves, involving phenomena such as attenuation, reflection, refraction, diffraction and redshift; wave fronts describe surfaces of equal phase.","purpose":"Let an agent handle wave propagation by wave type, medium, speed, losses and applications, and separate plant propagation and other senses.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Wave movement","Depends on medium","Involves losses and scattering","Basis of many technologies"],"structure":{"bundles":[{"id":"wave","name":"Wave","description":"Which wave.","layers":[{"id":"type","name":"Type","description":"Wave type.","findings":[{"id":"type-finding","name":"Type","description":"Wave type.","questions":[{"text":"Which kind of wave is propagating?","kind":"definition"},{"text":"Through which medium?","kind":"definition"}]}]},{"id":"speed","name":"Speed","description":"Propagation speed.","findings":[{"id":"speed-finding","name":"Speed","description":"Propagation speed.","questions":[{"text":"How fast does it travel in this medium?","kind":"measurement"},{"text":"What affects the speed?","kind":"definition"}]}]}]},{"id":"losses","name":"Losses","description":"Attenuation.","layers":[{"id":"attenuation","name":"Attenuation","description":"Loss.","findings":[{"id":"attenuation-finding","name":"Attenuation","description":"Attenuation.","questions":[{"text":"How much does the signal weaken over this distance?","kind":"measurement"},{"text":"Which model estimates it?","kind":"provenance"}]}]},{"id":"obstacles","name":"Obstacles","description":"Reflection and diffraction.","findings":[{"id":"obstacles-finding","name":"Obstacles","description":"Obstacles.","questions":[{"text":"How do buildings or terrain affect propagation?","kind":"definition"},{"text":"Is there multipath?","kind":"boundary"}]}]}]},{"id":"applications","name":"Applications","description":"Uses.","layers":[{"id":"radio","name":"Radio","description":"Coverage.","findings":[{"id":"radio-finding","name":"Radio","description":"Radio coverage.","questions":[{"text":"What range can this radio link achieve?","kind":"measurement"},{"text":"Which ITU model applies?","kind":"provenance"}]}]},{"id":"seismic","name":"Seismic","description":"Earthquakes.","findings":[{"id":"seismic-finding","name":"Seismic","description":"Seismic waves.","questions":[{"text":"How do seismic waves propagate through the Earth?","kind":"definition"},{"text":"How is this used in early warning?","kind":"provenance"}]}]}]},{"id":"senses","name":"Senses","description":"Disambiguation.","layers":[{"id":"plants","name":"Plants","description":"Plant propagation.","findings":[{"id":"plants-finding","name":"Plants","description":"Plant propagation.","questions":[{"text":"Is propagating plants from cuttings or seed meant?","kind":"boundary"},{"text":"Which entry fits?","kind":"action"}]}]},{"id":"redshift","name":"Redshift","description":"Cosmology.","findings":[{"id":"redshift-finding","name":"Redshift","description":"Redshift.","questions":[{"text":"How does redshift arise as light propagates through expanding space?","kind":"definition"},{"text":"Which sources explain it?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Explain how waves propagate and attenuate, citing standard physics sources.","Model radio or seismic propagation for planning on behalf of an authorized operator."],"mustNot":["Use propagation models to plan jamming or interference with others' communications.","Overstate coverage or signal reach in a way that misleads users relying on it for safety.","Present propagation claims as evidence of health harm or safety without scientific support."],"requiresHuman":["Siting transmitters or warning systems that people will rely on in emergencies."]},"ethics":{"considerations":["Emergency warnings and communications depend on accurate coverage predictions.","Fears about wave propagation are often exploited by misinformation."],"affectedParties":["People relying on communications","Communities near transmitters","Network operators"]},"owners":{"steward":"Nobody owns a physical phenomenon; spectrum regulators license its use.","roles":[],"masterSystems":[]},"relations":[{"target":"oewn-11439518-n","type":"parent","note":"registry parent class"},{"target":"wave phenomenon","type":"related","note":"category"},{"target":"reflection and refraction","type":"related","note":"processes"},{"target":"redshift","type":"related","note":"effect"},{"target":"plant propagation","type":"related","note":"another sense"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.propagation","Open English WordNet: oewn-11533425-n"]},"properties":{"applicability":"required","items":["Phase velocity:  m/s - Measure the speed of a constant-phase point for a specified wave type, frequency and medium.","Wavelength:  m - Measure the distance between successive points of equal phase along the direction of propagation.","Attenuation per unit distance:  dB/m - Measure the reduction in wave level over a known distance with frequency, medium and geometric spreading specified."]},"recognition":{"applicability":"required","items":["Wave fronts and rays","Attenuation with distance","Plant propagation is a different sense","Not visible directly; seen in ripples, echoes and signal coverage."]},"capabilities":{"applicability":"required","items":["explain propagation speed and losses","estimate signal ranges","relate propagation to redshift and cosmology","separate other senses of propagation"]},"hazards":{"applicability":"required","items":["Overestimating signal range","Confusing senses"]},"interfaces":{"applicability":"required","items":["ITU-R propagation recommendations"]},"context":{"applicability":"required","items":["Understanding communication, sensing, acoustics and astronomy.","electromagnetic propagation","acoustic propagation","seismic propagation","radio propagation","cosmological redshift"]}},"sources":[{"title":"Open English WordNet 2024, synset oewn-11533425-n","url":"https://en-word.net/id/oewn-11533425-n","note":"sense and gloss of the concept"},{"title":"Wiktionary: propagation","url":"https://en.wiktionary.org/wiki/propagation","note":"word senses and usage"}],"openQuestions":["Should wave types be separate entries?","How should ITU models be linked?","How should other senses be split off?"],"resources":{"spec":"/models/things/publications/thing-propagation/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-propagation/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T11:14:07Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T12:16:28+00:00: completeness 1.00; sense: WordNet gloss; 2 live sources; review by codex: pass"},"score":1.0}}