{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:DWMDYVZHGD2Q4U6ANKJTYVOYGQ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"4cfd9129a4e03fc83a090297cb3fb396095cc770c1f3b49c90beddef143d5fc1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2019-06-22T06:29:57Z","title_canon_sha256":"f139cdb0904c605161677fdf2cacca889bf5e69014ee8314367dd66d18f9d439"},"schema_version":"1.0","source":{"id":"1906.09397","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.09397","created_at":"2026-05-17T23:39:53Z"},{"alias_kind":"arxiv_version","alias_value":"1906.09397v1","created_at":"2026-05-17T23:39:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.09397","created_at":"2026-05-17T23:39:53Z"},{"alias_kind":"pith_short_12","alias_value":"DWMDYVZHGD2Q","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"DWMDYVZHGD2Q4U6A","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"DWMDYVZH","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:cc24b4f307a04c47a10ae6d1eeac0e5749a3c9f2ad56b95dfaf9043d903779c8","target":"graph","created_at":"2026-05-17T23:39:53Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Teaching about measurements and showing examples of instruments' non-ideal behaviour are important in physics education. Digital multimeter input impedance analysis is perfect for this, since these instruments are easily available, precise enough, have good value/price ratio and represent modern technology. A recent paper (2018 Phys. Educ. 53 053005) demonstrates how the investigation of the input impedance of a digital multimeter can be used in education. However, we think that some more discussion is needed to make it more complete.","authors_text":"Robert Mingesz, Zoltan gingl","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2019-06-22T06:29:57Z","title":"Comment on \"Resistance of a digital voltmeter: teaching creative thinking through an inquiry-based lab\""},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.09397","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:f9ebb552b21efe22b41b6ca406b4818dcdf61e9d8e55560ed4f9fdd37a2e0c3d","target":"record","created_at":"2026-05-17T23:39:53Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"4cfd9129a4e03fc83a090297cb3fb396095cc770c1f3b49c90beddef143d5fc1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2019-06-22T06:29:57Z","title_canon_sha256":"f139cdb0904c605161677fdf2cacca889bf5e69014ee8314367dd66d18f9d439"},"schema_version":"1.0","source":{"id":"1906.09397","kind":"arxiv","version":1}},"canonical_sha256":"1d983c572730f50e53c06a933c55d83439c1cdeef5e15f3a8f21945df2e2a706","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1d983c572730f50e53c06a933c55d83439c1cdeef5e15f3a8f21945df2e2a706","first_computed_at":"2026-05-17T23:39:53.458905Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:39:53.458905Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"l12acNaigUh3ijhhsa5KhoQNmeCgC9sFMsk4ay+PjpI9tR4HoTkWDjwwlbZlXZz7yp8nBg2WUc8Qh0cuNDD0BA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:39:53.459347Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.09397","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f9ebb552b21efe22b41b6ca406b4818dcdf61e9d8e55560ed4f9fdd37a2e0c3d","sha256:cc24b4f307a04c47a10ae6d1eeac0e5749a3c9f2ad56b95dfaf9043d903779c8"],"state_sha256":"10e7099c480350851918f50ccc012c4ee2b91a0affaef3ddbf937eca164a6b57"}