{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:FVJ5XJLZS2VTHPKGJUYWE24E2Q","short_pith_number":"pith:FVJ5XJLZ","canonical_record":{"source":{"id":"1903.06251","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-03-14T20:59:17Z","cross_cats_sorted":["physics.med-ph"],"title_canon_sha256":"c07eceb375e0b98e1bd5bd1c25ea41627b9937bca1873ff87d08a8275e7078d6","abstract_canon_sha256":"4064fa2cb343c35d033254eff825ce5f2c3bb8f4ae84f5f2b7bb75e5fb71fb65"},"schema_version":"1.0"},"canonical_sha256":"2d53dba57996ab33bd464d31626b84d405991cd88ed29d7ef890a0a0c8603f1d","source":{"kind":"arxiv","id":"1903.06251","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.06251","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"arxiv_version","alias_value":"1903.06251v1","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.06251","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"pith_short_12","alias_value":"FVJ5XJLZS2VT","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FVJ5XJLZS2VTHPKG","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FVJ5XJLZ","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:FVJ5XJLZS2VTHPKGJUYWE24E2Q","target":"record","payload":{"canonical_record":{"source":{"id":"1903.06251","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-03-14T20:59:17Z","cross_cats_sorted":["physics.med-ph"],"title_canon_sha256":"c07eceb375e0b98e1bd5bd1c25ea41627b9937bca1873ff87d08a8275e7078d6","abstract_canon_sha256":"4064fa2cb343c35d033254eff825ce5f2c3bb8f4ae84f5f2b7bb75e5fb71fb65"},"schema_version":"1.0"},"canonical_sha256":"2d53dba57996ab33bd464d31626b84d405991cd88ed29d7ef890a0a0c8603f1d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:11.362167Z","signature_b64":"cbFcQ5b8mfblWj+CU98AskfBsQQ0VE+cqrYHrc5Cp7har2j1cRkbIxMx/SJJK3jMXmeJaphcHvFh48bqGfXZCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2d53dba57996ab33bd464d31626b84d405991cd88ed29d7ef890a0a0c8603f1d","last_reissued_at":"2026-05-17T23:51:11.361565Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:11.361565Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.06251","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":"2026-05-17T23:51:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5/RKGBuAaxiOjB527jYyQ1rLoB0l3cLz6K2IBIcPs1rcZ6Yl+WGvWt5YfYTHs5UIhx8S/7X5Ieele/epa4fyDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T04:41:43.441997Z"},"content_sha256":"364e1b3d497e247e4cb38da7eee4a7f66caa34ef12df57fd7f717cf03d95b477","schema_version":"1.0","event_id":"sha256:364e1b3d497e247e4cb38da7eee4a7f66caa34ef12df57fd7f717cf03d95b477"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:FVJ5XJLZS2VTHPKGJUYWE24E2Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reduced-order modeling of left ventricular flow subject to aortic valve regurgitation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.med-ph"],"primary_cat":"physics.flu-dyn","authors_text":"Giuseppe Di Labbio, Lyes Kadem","submitted_at":"2019-03-14T20:59:17Z","abstract_excerpt":"The present focus of heart flow studies is largely based on flow within the left ventricle and how this flow changes when subject to disease. However, despite recent advancements, a simple tractable model of even healthy left ventricular flow has not been produced and made available. Reduced-order modeling techniques, such as proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD), offer an effective means of expressing the large datasets obtained from experiments or numerical simulations using low-dimensional models. While POD and DMD are often used to identify coherent str"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.06251","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":"2026-05-17T23:51:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fxes4t2I7vmmIdz5xnf2LIfDwGvXeRLB6qsbvOCD/Y3RMJcO+NjRUR2X4VIoQflJCASBdIEd/F1LLFcgWlFLCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T04:41:43.442674Z"},"content_sha256":"b9863d31de67dbf05563c38fb961d4db37c85c2e83a79abf450538cc491174f7","schema_version":"1.0","event_id":"sha256:b9863d31de67dbf05563c38fb961d4db37c85c2e83a79abf450538cc491174f7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FVJ5XJLZS2VTHPKGJUYWE24E2Q/bundle.json","state_url":"https://pith.science/pith/FVJ5XJLZS2VTHPKGJUYWE24E2Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FVJ5XJLZS2VTHPKGJUYWE24E2Q/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":"2026-06-12T04:41:43Z","links":{"resolver":"https://pith.science/pith/FVJ5XJLZS2VTHPKGJUYWE24E2Q","bundle":"https://pith.science/pith/FVJ5XJLZS2VTHPKGJUYWE24E2Q/bundle.json","state":"https://pith.science/pith/FVJ5XJLZS2VTHPKGJUYWE24E2Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FVJ5XJLZS2VTHPKGJUYWE24E2Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:FVJ5XJLZS2VTHPKGJUYWE24E2Q","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":"4064fa2cb343c35d033254eff825ce5f2c3bb8f4ae84f5f2b7bb75e5fb71fb65","cross_cats_sorted":["physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-03-14T20:59:17Z","title_canon_sha256":"c07eceb375e0b98e1bd5bd1c25ea41627b9937bca1873ff87d08a8275e7078d6"},"schema_version":"1.0","source":{"id":"1903.06251","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.06251","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"arxiv_version","alias_value":"1903.06251v1","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.06251","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"pith_short_12","alias_value":"FVJ5XJLZS2VT","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FVJ5XJLZS2VTHPKG","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FVJ5XJLZ","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:b9863d31de67dbf05563c38fb961d4db37c85c2e83a79abf450538cc491174f7","target":"graph","created_at":"2026-05-17T23:51:11Z","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 present focus of heart flow studies is largely based on flow within the left ventricle and how this flow changes when subject to disease. However, despite recent advancements, a simple tractable model of even healthy left ventricular flow has not been produced and made available. Reduced-order modeling techniques, such as proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD), offer an effective means of expressing the large datasets obtained from experiments or numerical simulations using low-dimensional models. While POD and DMD are often used to identify coherent str","authors_text":"Giuseppe Di Labbio, Lyes Kadem","cross_cats":["physics.med-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-03-14T20:59:17Z","title":"Reduced-order modeling of left ventricular flow subject to aortic valve regurgitation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.06251","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":"sha256:364e1b3d497e247e4cb38da7eee4a7f66caa34ef12df57fd7f717cf03d95b477","target":"record","created_at":"2026-05-17T23:51:11Z","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":"4064fa2cb343c35d033254eff825ce5f2c3bb8f4ae84f5f2b7bb75e5fb71fb65","cross_cats_sorted":["physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-03-14T20:59:17Z","title_canon_sha256":"c07eceb375e0b98e1bd5bd1c25ea41627b9937bca1873ff87d08a8275e7078d6"},"schema_version":"1.0","source":{"id":"1903.06251","kind":"arxiv","version":1}},"canonical_sha256":"2d53dba57996ab33bd464d31626b84d405991cd88ed29d7ef890a0a0c8603f1d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2d53dba57996ab33bd464d31626b84d405991cd88ed29d7ef890a0a0c8603f1d","first_computed_at":"2026-05-17T23:51:11.361565Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:11.361565Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cbFcQ5b8mfblWj+CU98AskfBsQQ0VE+cqrYHrc5Cp7har2j1cRkbIxMx/SJJK3jMXmeJaphcHvFh48bqGfXZCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:11.362167Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.06251","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:364e1b3d497e247e4cb38da7eee4a7f66caa34ef12df57fd7f717cf03d95b477","sha256:b9863d31de67dbf05563c38fb961d4db37c85c2e83a79abf450538cc491174f7"],"state_sha256":"bf7614b44d02ada2e8ba2084d7bd30e3930ea80f6102dde7b2b975f72d16af49"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ksVq7BcZqngRTEkj+sFC8+iQMzYRQ7rP08DZXazlnlMHz5yVd5VcBAIdbdbmx4tAZ05m+/qG0Bn7CWm53LFdAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-12T04:41:43.446553Z","bundle_sha256":"0d6933732886f9601ab66d2205cc3a740f2af91644e8e69a98c02d20b892da6b"}}