{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:WDMRQWUPG4HGYNPH3FO3N7DZB4","short_pith_number":"pith:WDMRQWUP","canonical_record":{"source":{"id":"chao-dyn/9905035","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"chao-dyn","submitted_at":"1999-05-20T19:33:49Z","cross_cats_sorted":["cond-mat.mtrl-sci","nlin.CD"],"title_canon_sha256":"762c9e052b33f7abb8f54c7c6903a701d776a2b6ee1e78ffb8d315829c4f498c","abstract_canon_sha256":"700fd7bc575dbd9a148677c56805b9a1cc036ba9b966f02eeab7e80823ed7735"},"schema_version":"1.0"},"canonical_sha256":"b0d9185a8f370e6c35e7d95db6fc790f352313f9145804d3714c2ffc501ba902","source":{"kind":"arxiv","id":"chao-dyn/9905035","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"chao-dyn/9905035","created_at":"2026-05-18T03:50:23Z"},{"alias_kind":"arxiv_version","alias_value":"chao-dyn/9905035v1","created_at":"2026-05-18T03:50:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.chao-dyn/9905035","created_at":"2026-05-18T03:50:23Z"},{"alias_kind":"pith_short_12","alias_value":"WDMRQWUPG4HG","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"WDMRQWUPG4HGYNPH","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"WDMRQWUP","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:WDMRQWUPG4HGYNPH3FO3N7DZB4","target":"record","payload":{"canonical_record":{"source":{"id":"chao-dyn/9905035","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"chao-dyn","submitted_at":"1999-05-20T19:33:49Z","cross_cats_sorted":["cond-mat.mtrl-sci","nlin.CD"],"title_canon_sha256":"762c9e052b33f7abb8f54c7c6903a701d776a2b6ee1e78ffb8d315829c4f498c","abstract_canon_sha256":"700fd7bc575dbd9a148677c56805b9a1cc036ba9b966f02eeab7e80823ed7735"},"schema_version":"1.0"},"canonical_sha256":"b0d9185a8f370e6c35e7d95db6fc790f352313f9145804d3714c2ffc501ba902","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:50:23.240418Z","signature_b64":"yGb18jrNkLhrE2gX6Yldl+UQupnxu/QKmrac9MKJ0WJO6OpUWJ0xLwjjPw850u0PX3EkU+o3bkCObKehKhgzBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b0d9185a8f370e6c35e7d95db6fc790f352313f9145804d3714c2ffc501ba902","last_reissued_at":"2026-05-18T03:50:23.239681Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:50:23.239681Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"chao-dyn/9905035","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:50:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xL5KJo4DErMzo1Da3OCazMmAVxRa/c3cf+2QX6L+RbYuGlHXZHD1QseiG/3STJStJeSy/XLj2yQLDYUij097AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:21:30.873981Z"},"content_sha256":"f55fd2c0b1acbee8c2cbc337c4c6b855629f57ed3ef2becb5b39db83339e6b70","schema_version":"1.0","event_id":"sha256:f55fd2c0b1acbee8c2cbc337c4c6b855629f57ed3ef2becb5b39db83339e6b70"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:WDMRQWUPG4HGYNPH3FO3N7DZB4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dynamics of Elastic Excitable Media","license":"","headline":"","cross_cats":["cond-mat.mtrl-sci","nlin.CD"],"primary_cat":"chao-dyn","authors_text":"Emilio Hernandez-Garcia, Julyan H. E. Cartwright, Oreste Piro, Victor M. Eguiluz","submitted_at":"1999-05-20T19:33:49Z","abstract_excerpt":"The Burridge-Knopoff model of earthquake faults with viscous friction is equivalent to a van der Pol-FitzHugh-Nagumo model for excitable media with elastic coupling. The lubricated creep-slip friction law we use in the Burridge-Knopoff model describes the frictional sliding dynamics of a range of real materials. Low-dimensional structures including synchronized oscillations and propagating fronts are dominant, in agreement with the results of laboratory friction experiments. Here we explore the dynamics of fronts in elastic excitable media."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"chao-dyn/9905035","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:50:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/+KizA0AQCsGnMUFBONLgE8W8EtRnjyWsZYSu1ZSbiICNafBDSUNgOFfXvbhymuoHX38GS4n6G04YYVsjXspAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:21:30.874645Z"},"content_sha256":"17604e1db58e44d04ba305236a67a31a7b568ca00c3a14c966dcf7f697cbcc23","schema_version":"1.0","event_id":"sha256:17604e1db58e44d04ba305236a67a31a7b568ca00c3a14c966dcf7f697cbcc23"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WDMRQWUPG4HGYNPH3FO3N7DZB4/bundle.json","state_url":"https://pith.science/pith/WDMRQWUPG4HGYNPH3FO3N7DZB4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WDMRQWUPG4HGYNPH3FO3N7DZB4/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T17:21:30Z","links":{"resolver":"https://pith.science/pith/WDMRQWUPG4HGYNPH3FO3N7DZB4","bundle":"https://pith.science/pith/WDMRQWUPG4HGYNPH3FO3N7DZB4/bundle.json","state":"https://pith.science/pith/WDMRQWUPG4HGYNPH3FO3N7DZB4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WDMRQWUPG4HGYNPH3FO3N7DZB4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:WDMRQWUPG4HGYNPH3FO3N7DZB4","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":"700fd7bc575dbd9a148677c56805b9a1cc036ba9b966f02eeab7e80823ed7735","cross_cats_sorted":["cond-mat.mtrl-sci","nlin.CD"],"license":"","primary_cat":"chao-dyn","submitted_at":"1999-05-20T19:33:49Z","title_canon_sha256":"762c9e052b33f7abb8f54c7c6903a701d776a2b6ee1e78ffb8d315829c4f498c"},"schema_version":"1.0","source":{"id":"chao-dyn/9905035","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"chao-dyn/9905035","created_at":"2026-05-18T03:50:23Z"},{"alias_kind":"arxiv_version","alias_value":"chao-dyn/9905035v1","created_at":"2026-05-18T03:50:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.chao-dyn/9905035","created_at":"2026-05-18T03:50:23Z"},{"alias_kind":"pith_short_12","alias_value":"WDMRQWUPG4HG","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"WDMRQWUPG4HGYNPH","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"WDMRQWUP","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:17604e1db58e44d04ba305236a67a31a7b568ca00c3a14c966dcf7f697cbcc23","target":"graph","created_at":"2026-05-18T03:50:23Z","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":"The Burridge-Knopoff model of earthquake faults with viscous friction is equivalent to a van der Pol-FitzHugh-Nagumo model for excitable media with elastic coupling. The lubricated creep-slip friction law we use in the Burridge-Knopoff model describes the frictional sliding dynamics of a range of real materials. Low-dimensional structures including synchronized oscillations and propagating fronts are dominant, in agreement with the results of laboratory friction experiments. Here we explore the dynamics of fronts in elastic excitable media.","authors_text":"Emilio Hernandez-Garcia, Julyan H. E. Cartwright, Oreste Piro, Victor M. Eguiluz","cross_cats":["cond-mat.mtrl-sci","nlin.CD"],"headline":"","license":"","primary_cat":"chao-dyn","submitted_at":"1999-05-20T19:33:49Z","title":"Dynamics of Elastic Excitable Media"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"chao-dyn/9905035","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:f55fd2c0b1acbee8c2cbc337c4c6b855629f57ed3ef2becb5b39db83339e6b70","target":"record","created_at":"2026-05-18T03:50:23Z","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":"700fd7bc575dbd9a148677c56805b9a1cc036ba9b966f02eeab7e80823ed7735","cross_cats_sorted":["cond-mat.mtrl-sci","nlin.CD"],"license":"","primary_cat":"chao-dyn","submitted_at":"1999-05-20T19:33:49Z","title_canon_sha256":"762c9e052b33f7abb8f54c7c6903a701d776a2b6ee1e78ffb8d315829c4f498c"},"schema_version":"1.0","source":{"id":"chao-dyn/9905035","kind":"arxiv","version":1}},"canonical_sha256":"b0d9185a8f370e6c35e7d95db6fc790f352313f9145804d3714c2ffc501ba902","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b0d9185a8f370e6c35e7d95db6fc790f352313f9145804d3714c2ffc501ba902","first_computed_at":"2026-05-18T03:50:23.239681Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:50:23.239681Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yGb18jrNkLhrE2gX6Yldl+UQupnxu/QKmrac9MKJ0WJO6OpUWJ0xLwjjPw850u0PX3EkU+o3bkCObKehKhgzBg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:50:23.240418Z","signed_message":"canonical_sha256_bytes"},"source_id":"chao-dyn/9905035","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f55fd2c0b1acbee8c2cbc337c4c6b855629f57ed3ef2becb5b39db83339e6b70","sha256:17604e1db58e44d04ba305236a67a31a7b568ca00c3a14c966dcf7f697cbcc23"],"state_sha256":"5a10cd29a4e20d020b26dbd469edbb3f7cf0bd427a40c9519120f3d54d08e570"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PkMjXoOHr2aAgg3HKTCIWIVSfM5RUWjDaMPKpEaGuxK53IYNdPPnYg04zYhYL5CTsLY4NXiP05mvPwm8tYkyBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T17:21:30.877050Z","bundle_sha256":"a82495864d3dd32e861bc60cc81f07be47428a01cf13e224b66545126a67e85e"}}