{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:CLGRLMCFKRBMQUVL627AAJHMPU","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":"00e4ad6c0e47ad161ea6290369f24b7be5d7326a39d38b97f86866095a4c936b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2013-12-19T16:14:19Z","title_canon_sha256":"1e21b66aeeb60e9d50be35d95f692314e32616f94843c9fea6dad3aaa5fb3d51"},"schema_version":"1.0","source":{"id":"1312.5611","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.5611","created_at":"2026-05-18T03:04:14Z"},{"alias_kind":"arxiv_version","alias_value":"1312.5611v1","created_at":"2026-05-18T03:04:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.5611","created_at":"2026-05-18T03:04:14Z"},{"alias_kind":"pith_short_12","alias_value":"CLGRLMCFKRBM","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"CLGRLMCFKRBMQUVL","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"CLGRLMCF","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:f22b26522b8eb517374057ec7ceb4e98915f6d2e947852fda3a65af8b6d683e4","target":"graph","created_at":"2026-05-18T03:04:14Z","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":"We present a simple experiment that allows advanced undergraduates to learn the principles and applications of spectroscopy. The technique, known as acoustic resonance spectroscopy, is applied to study a vibrating rod. The setup includes electromagnetic-acoustic transducers, an audio amplifier and a vector network analyzer. Typical results of compressional, torsional and bending waves are analyzed and compared with analytical results.","authors_text":"E. Flores-Olmedo, G. B\\'aez, J. A. Franco-Villafa\\~ne, O. Gandarilla-Carrillo, R. A. M\\'endez-S\\'anchez","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2013-12-19T16:14:19Z","title":"Acoustic resonance spectroscopy for the advanced undergraduate laboratory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.5611","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":"sha256:47c9577dbc8d41be56358f753ac0c8d855b6d46690f395d6d7ad3839ec4ae84e","target":"record","created_at":"2026-05-18T03:04:14Z","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":"00e4ad6c0e47ad161ea6290369f24b7be5d7326a39d38b97f86866095a4c936b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2013-12-19T16:14:19Z","title_canon_sha256":"1e21b66aeeb60e9d50be35d95f692314e32616f94843c9fea6dad3aaa5fb3d51"},"schema_version":"1.0","source":{"id":"1312.5611","kind":"arxiv","version":1}},"canonical_sha256":"12cd15b0455442c852abf6be0024ec7d30a04b9f71167d9e23dc82c7a4f3b06b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"12cd15b0455442c852abf6be0024ec7d30a04b9f71167d9e23dc82c7a4f3b06b","first_computed_at":"2026-05-18T03:04:14.456206Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:04:14.456206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"81wB9wiwwrhZBJaNOhu9SF0QrusMw5EaSM23IrY355nF5j5k3olyJMjt34ecNfusNz6relTRmiqTNW69wPobCg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:04:14.456697Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.5611","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:47c9577dbc8d41be56358f753ac0c8d855b6d46690f395d6d7ad3839ec4ae84e","sha256:f22b26522b8eb517374057ec7ceb4e98915f6d2e947852fda3a65af8b6d683e4"],"state_sha256":"1fb09eac23a496a1c4b37593c9a6b7d7ab125d8274f538a71e998ba0ad5ece19"}