{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:3U5KRBOOKTDMFHPDY642O2XVRN","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":"9148600e1f3e73d8de91473d87aee066822f6793aac4260193922af32498ad52","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-06-14T08:02:40Z","title_canon_sha256":"19a98a9466afa1e147fc7b6970d73a43ca546ec37c4903450c4deec97faad51d"},"schema_version":"1.0","source":{"id":"1806.05404","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.05404","created_at":"2026-05-18T00:03:05Z"},{"alias_kind":"arxiv_version","alias_value":"1806.05404v1","created_at":"2026-05-18T00:03:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.05404","created_at":"2026-05-18T00:03:05Z"},{"alias_kind":"pith_short_12","alias_value":"3U5KRBOOKTDM","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"3U5KRBOOKTDMFHPD","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"3U5KRBOO","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:1f5109141cffb0ce9c17e228c9f5f6f01d282d5885745047fe1af5119940b068","target":"graph","created_at":"2026-05-18T00:03:05Z","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":"A structure capable of substantially amplifying water waves over a broad range of frequencies at selected locations is proposed. The structure consists of a small number of C-shaped cylinders arranged in a line array, with the cylinder properties graded along the array. Using linear potential-flow theory, it is shown that the energy carried by a plane incident wave is amplified within specified cylinders, for wavelengths comparable to the array length, and for a range of incident directions. Transfer matrix analysis is used to attribute the large amplifications to excitation of Rayleigh--Bloch","authors_text":"and Richard V. Craster, Luke G. Bennetts, Malte A.Peter","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-06-14T08:02:40Z","title":"Graded resonator arrays for spatial frequency separation and amplification of water waves"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.05404","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":"sha256:565bc8ffd69a7e1974d62497d309a4c6fbef2e06dcb90c52111c0821b9407d37","target":"record","created_at":"2026-05-18T00:03:05Z","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":"9148600e1f3e73d8de91473d87aee066822f6793aac4260193922af32498ad52","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-06-14T08:02:40Z","title_canon_sha256":"19a98a9466afa1e147fc7b6970d73a43ca546ec37c4903450c4deec97faad51d"},"schema_version":"1.0","source":{"id":"1806.05404","kind":"arxiv","version":1}},"canonical_sha256":"dd3aa885ce54c6c29de3c7b9a76af58b646a071f39099124514c4d27d85e85dc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dd3aa885ce54c6c29de3c7b9a76af58b646a071f39099124514c4d27d85e85dc","first_computed_at":"2026-05-18T00:03:05.260257Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:03:05.260257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Coi+p1m0G8z8Z2f5DU8pDZlAQT/afgb+OkDe20nlamd1iNKMEXAhOlwVMu2QgYknTSoK/3L5mZr4QxGVZNnqBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:03:05.260671Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.05404","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:565bc8ffd69a7e1974d62497d309a4c6fbef2e06dcb90c52111c0821b9407d37","sha256:1f5109141cffb0ce9c17e228c9f5f6f01d282d5885745047fe1af5119940b068"],"state_sha256":"822997204156c4429b8c7477b36fd0a36f2b97c3ecce8416645525094bbd3847"}