{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:CTHHYX62LA4WMUOPYM7JCONFMO","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":"78ff858c06b743f397e67afc9d72acfcb60c4810a67521907e01478ce566992d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-01-27T00:24:46Z","title_canon_sha256":"f7843e9b833ec32131f4990036f3543730451bc46afb47d624ef8c4dfd19d595"},"schema_version":"1.0","source":{"id":"1501.06628","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.06628","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"arxiv_version","alias_value":"1501.06628v2","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.06628","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"pith_short_12","alias_value":"CTHHYX62LA4W","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"CTHHYX62LA4WMUOP","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"CTHHYX62","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:723f986421b262a00824869533252d43816d0543b15c745024b1ffb9321d98e4","target":"graph","created_at":"2026-05-18T02:28:06Z","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":"Transition and turbulence production in a hypersonic boundary layer is investigated in a Mach 6 quiet wind tunnel using Rayleigh-scattering visualization, fast-response pressure measurements, and particle image velocimetry. It is found that the second instability acoustic mode is the key modulator of the transition process. The second mode experiences a rapid growth and a very fast annihilation due to the effect of bulk viscosity. The second mode interacts strongly with the first vorticity mode to directly promote a fast growth of the latter and leads to immediate transition to turbulence.","authors_text":"Chuanhong Zhang, Cunbiao Lee, Huijing Yuan, Jiezhi Wu, Mohamed Gad-el-Hak, Shiyi Chen, Yiding Zhu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-01-27T00:24:46Z","title":"Transition in Hypersonic Boundary Layers: Role of Dilatational Waves"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.06628","kind":"arxiv","version":2},"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":"sha256:256a9c68bd6986ac7be889ebebc6308de986f92cd68e4e7ec19183e9378ebd81","target":"record","created_at":"2026-05-18T02:28:06Z","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":"78ff858c06b743f397e67afc9d72acfcb60c4810a67521907e01478ce566992d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-01-27T00:24:46Z","title_canon_sha256":"f7843e9b833ec32131f4990036f3543730451bc46afb47d624ef8c4dfd19d595"},"schema_version":"1.0","source":{"id":"1501.06628","kind":"arxiv","version":2}},"canonical_sha256":"14ce7c5fda58396651cfc33e9139a563bfa513cd0af572dc630065f3c9e3143a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"14ce7c5fda58396651cfc33e9139a563bfa513cd0af572dc630065f3c9e3143a","first_computed_at":"2026-05-18T02:28:06.611346Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:28:06.611346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u32QhRHSFJRi8EpZM/f6xrTwTeXWpyIZwt6v+ievlBAcKg9v6wS88UOQuK6buZunbz/gAcJcjiAUCv3y6JFxDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:28:06.611768Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.06628","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:256a9c68bd6986ac7be889ebebc6308de986f92cd68e4e7ec19183e9378ebd81","sha256:723f986421b262a00824869533252d43816d0543b15c745024b1ffb9321d98e4"],"state_sha256":"4c17cc481b15e9e1e1b5e5e8aab317747d59256dfc509dc9f17eb8c1ee658ecf"}