{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:EMXOQTYCTMWZ22AA2XWINIG5CG","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":"1d291379296d0d26b654eebe95f35b4717bfc97d1ef98b7bcb402c24a3a86418","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-08-21T01:16:42Z","title_canon_sha256":"8104ecedac8c27e4269dba44f8b7a47dcd51bece13c75bb631e8e18fd06f852f"},"schema_version":"1.0","source":{"id":"1908.07663","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.07663","created_at":"2026-07-04T23:59:09Z"},{"alias_kind":"arxiv_version","alias_value":"1908.07663v1","created_at":"2026-07-04T23:59:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.07663","created_at":"2026-07-04T23:59:09Z"},{"alias_kind":"pith_short_12","alias_value":"EMXOQTYCTMWZ","created_at":"2026-07-04T23:59:09Z"},{"alias_kind":"pith_short_16","alias_value":"EMXOQTYCTMWZ22AA","created_at":"2026-07-04T23:59:09Z"},{"alias_kind":"pith_short_8","alias_value":"EMXOQTYC","created_at":"2026-07-04T23:59:09Z"}],"graph_snapshots":[{"event_id":"sha256:534bbc69908ab567217abafe6dfcd386db8fb299251f71f86881365caaa1c0e6","target":"graph","created_at":"2026-07-04T23:59:09Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1908.07663/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The attenuation of low-intensity acoustic waves in the suspension of ultrasound contrast agents (UCAs, microbubbles) is determined by the oscillation of the microbubbles in the medium. This bubble-induced attenuation is a linear phenomenon and can be estimated via a linearized Rayleigh-Plesset equation (RPE). In the material characterization, theoretical attenuation is estimated from steady state oscillation of an UCA and immediately compared with experimental attenuation data that are usually measured by shot-pulse ultrasound. However, discrepancy could exist in the characterization if the UC","authors_text":"Lang Xia","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-08-21T01:16:42Z","title":"Attenuation of an Ultrasound Contrast Agent Estimated from Transient Solution of Linearized Rayleigh-Plesset Equation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.07663","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":"sha256:084f4df646a3e29816fcdd352463754e24d9c56d207dd0bcfc99e658b5a01cde","target":"record","created_at":"2026-07-04T23:59:09Z","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":"1d291379296d0d26b654eebe95f35b4717bfc97d1ef98b7bcb402c24a3a86418","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-08-21T01:16:42Z","title_canon_sha256":"8104ecedac8c27e4269dba44f8b7a47dcd51bece13c75bb631e8e18fd06f852f"},"schema_version":"1.0","source":{"id":"1908.07663","kind":"arxiv","version":1}},"canonical_sha256":"232ee84f029b2d9d6800d5ec86a0dd11a87bc135ca789977a0e878e0421a9dd9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"232ee84f029b2d9d6800d5ec86a0dd11a87bc135ca789977a0e878e0421a9dd9","first_computed_at":"2026-07-04T23:59:09.070848Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:59:09.070848Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gFNyi/utzUWe55cmjuP/sPScojrv4SLn5x3LYG/KiCPqfQcxXk7vXSTyENa13dwSX+5F5yyCcGPnaKO8gPzNDw==","signature_status":"signed_v1","signed_at":"2026-07-04T23:59:09.071367Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.07663","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:084f4df646a3e29816fcdd352463754e24d9c56d207dd0bcfc99e658b5a01cde","sha256:534bbc69908ab567217abafe6dfcd386db8fb299251f71f86881365caaa1c0e6"],"state_sha256":"993d318a5e7ae3fa323475a8141d0f4777890fe29f636fd72b699c77cd72ee10"}