{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.contact-event","code":"thing-contact-event","url":"https://ver.cy/models/thing/contact-event/","name":"contact","alternateNames":["collision","hit","engagement","mesh","meshing","interlocking","flick","impact","blow","bump","slam","jolt"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Activities and processes","entryKind":"noun.event","plane":"ACT","domain":["ACT.EVT"],"industry":[],"navPath":"","tags":[],"facets":{"substance":"activity","origin":"conceptual","agency":"inert","mobility":"not-applicable","scale":"not-applicable","affordances":["observable"]}},"whatItIs":"The physical coming together of two or more things, such as a collision, an impact, meshing of gears, interlocking parts or a touch; contact events are studied in mechanics for forces and energy transfer and matter in safety, engineering and sport.","purpose":"Let an agent explain contact events in physics and engineering, give safety guidance for collisions, and separate social and electrical senses of contact.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Physical touching","Transfers force and energy","Elastic or inelastic","Central to mechanics"],"structure":{"bundles":[{"id":"physics","name":"Physics","description":"Collisions.","layers":[{"id":"momentum","name":"Momentum","description":"Momentum and energy.","findings":[{"id":"momentum-finding","name":"Momentum","description":"Momentum and energy.","questions":[{"text":"What are the velocities after this collision, using momentum conservation?","kind":"measurement"},{"text":"Is the collision elastic or inelastic?","kind":"boundary"}]}]},{"id":"forces","name":"Forces","description":"Contact forces.","findings":[{"id":"forces-finding","name":"Forces","description":"Contact forces.","questions":[{"text":"What forces act at the contact, such as normal force and friction?","kind":"definition"},{"text":"How large is the impact force?","kind":"measurement"}]}]}]},{"id":"engineering","name":"Engineering","description":"Contact mechanics.","layers":[{"id":"gears","name":"Gears","description":"Meshing.","findings":[{"id":"gears-finding","name":"Gears","description":"Meshing.","questions":[{"text":"How do gears mesh, and what determines wear?","kind":"definition"},{"text":"Which lubrication applies?","kind":"provenance"}]}]},{"id":"wear","name":"Wear","description":"Wear and fatigue.","findings":[{"id":"wear-finding","name":"Wear","description":"Wear.","questions":[{"text":"How does repeated contact cause wear or fatigue?","kind":"definition"},{"text":"How is it measured?","kind":"measurement"}]}]}]},{"id":"safety","name":"Safety","description":"Collisions.","layers":[{"id":"crash","name":"Crash","description":"Vehicle collisions.","findings":[{"id":"crash-finding","name":"Crash","description":"Vehicle collisions.","questions":[{"text":"Has a collision caused injuries?","kind":"boundary"},{"text":"Should emergency services be called and the scene made safe?","kind":"action"}]}]},{"id":"sport","name":"Sport","description":"Contact sports.","findings":[{"id":"sport-finding","name":"Sport","description":"Contact sports.","questions":[{"text":"Which rules and protective equipment reduce injury in this contact sport?","kind":"provenance"},{"text":"What are the concussion protocols?","kind":"provenance"}]}]}]},{"id":"senses","name":"Senses","description":"Disambiguation.","layers":[{"id":"social","name":"Social","description":"Communication.","findings":[{"id":"social-finding","name":"Social","description":"Social sense.","questions":[{"text":"Is contact meant as communication or a person in an address book?","kind":"boundary"},{"text":"Which entry fits?","kind":"action"}]}]},{"id":"electrical","name":"Electrical","description":"Electrical contacts.","findings":[{"id":"electrical-finding","name":"Electrical","description":"Electrical sense.","questions":[{"text":"Is an electrical contact or contact lens meant?","kind":"boundary"},{"text":"Which entry fits?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Detect and log contact events between machines, parts or objects it monitors.","Stop or slow its own motion when unexpected contact occurs."],"mustNot":["Continue moving after unexpected contact with a person.","Disable contact or collision sensors on machines that work near people.","Treat contact with a person as harmless without checking.","Hide records of collisions from the operator or investigators."],"requiresHuman":["Resuming operation after a collision that may have caused injury or damage."]},"ethics":{"considerations":["Contact between machines and people causes injury; detection protects bodies.","Collision records decide liability and must stay honest."],"affectedParties":["People near moving machines","Operators","Owners of damaged property"]},"owners":{"steward":"Nobody owns the event; the operator of the machine answers for contacts it causes.","roles":[],"masterSystems":[]},"relations":[{"target":"oewn-07298313-n","type":"parent","note":"registry parent class"},{"target":"event","type":"related","note":"category"},{"target":"mechanics","type":"related","note":"field"},{"target":"inertia","type":"related","note":"physics"},{"target":"response","type":"related","note":"reaction"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.contact-event","Open English WordNet: oewn-07353929-n"]},"properties":{"applicability":"not-applicable","items":[]},"recognition":{"applicability":"optional","items":["Impacts and meshing parts","Deformation at contact points","Electrical contacts are conductive connections","Objects touching, striking or interlocking."]},"capabilities":{"applicability":"required","items":["analyse collisions with momentum and energy","explain contact mechanics such as friction and wear","give collision safety guidance","separate other senses of contact"]},"hazards":{"applicability":"required","items":["Injuries from collisions","Wear and failure at contact surfaces","Confusing senses of contact"]},"interfaces":{"applicability":"required","items":["Vehicle crash test standards","Sports contact rules","Machinery guarding standards"]},"context":{"applicability":"required","items":["Mechanics, engineering, safety and sport.","collisions and impacts","meshing and interlocking","sliding and rolling contact","sports contact","vehicle collisions"]}},"sources":[{"title":"Open English WordNet 2024, synset oewn-07353929-n","url":"https://en-word.net/id/oewn-07353929-n","note":"sense and gloss of the concept"},{"title":"Wiktionary: contact","url":"https://en.wiktionary.org/wiki/contact","note":"word senses and usage"}],"openQuestions":["Should collisions be a separate entry?","How should contact mechanics resources be linked?","How should other senses be split off?"],"resources":{"spec":"/models/things/publications/thing-contact-event/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-contact-event/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T15:19:39Z","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":"not-applicable","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 2026-10-07T12:16:27+00:00: completeness 1.00; sense: WordNet gloss; 2 live sources; review by codex: pass","interaction.properties":"Plane ACT: no invented physical properties."},"score":1.0}}