{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:7V5AH6CLO4PCDS6NSBOMSTKELG","short_pith_number":"pith:7V5AH6CL","canonical_record":{"source":{"id":"1809.03219","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-09-10T09:47:55Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"cf19e04809b0d518a37cbc144a2adc01ad3f5032279133a8f55c0e5e9de1ffee","abstract_canon_sha256":"ebab1e1f4a0e60754d2a4da90c45beb280823a8bbbcb3eb60253f5a8873bdc03"},"schema_version":"1.0"},"canonical_sha256":"fd7a03f84b771e21cbcd905cc94d44598f3c55eecbea3ce1f5a9e6f6934c7ff9","source":{"kind":"arxiv","id":"1809.03219","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.03219","created_at":"2026-05-18T00:06:09Z"},{"alias_kind":"arxiv_version","alias_value":"1809.03219v1","created_at":"2026-05-18T00:06:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.03219","created_at":"2026-05-18T00:06:09Z"},{"alias_kind":"pith_short_12","alias_value":"7V5AH6CLO4PC","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7V5AH6CLO4PCDS6N","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7V5AH6CL","created_at":"2026-05-18T12:32:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:7V5AH6CLO4PCDS6NSBOMSTKELG","target":"record","payload":{"canonical_record":{"source":{"id":"1809.03219","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-09-10T09:47:55Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"cf19e04809b0d518a37cbc144a2adc01ad3f5032279133a8f55c0e5e9de1ffee","abstract_canon_sha256":"ebab1e1f4a0e60754d2a4da90c45beb280823a8bbbcb3eb60253f5a8873bdc03"},"schema_version":"1.0"},"canonical_sha256":"fd7a03f84b771e21cbcd905cc94d44598f3c55eecbea3ce1f5a9e6f6934c7ff9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:09.602248Z","signature_b64":"RTuIE/QLMsK/F7ulcScYEuzmBRi/X1lkt2IJ7RhbBthPqQMC/zWsHkOzlIntcRn1kGIecY0ayccwZDtaX4uADw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fd7a03f84b771e21cbcd905cc94d44598f3c55eecbea3ce1f5a9e6f6934c7ff9","last_reissued_at":"2026-05-18T00:06:09.601527Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:09.601527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.03219","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":"2026-05-18T00:06:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hy79Q7IPN1akOgF8RO4V+pfwImDmSG1cDGXGiOuSUUgetTaEh8go12vD85J+FubUsskCPr92a0VBUjvx7ODgBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T11:06:22.438400Z"},"content_sha256":"cfa90b811fe7cbd667fdf26e6787ee73dbb7305e9a28461dc9b7d47f53fd684f","schema_version":"1.0","event_id":"sha256:cfa90b811fe7cbd667fdf26e6787ee73dbb7305e9a28461dc9b7d47f53fd684f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:7V5AH6CLO4PCDS6NSBOMSTKELG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Using liner surface modes in ducts to make obstacles reflectionless","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.app-ph","authors_text":"Maaz Farooqui, Vincent Pagneux, Yves Aur\\'egan","submitted_at":"2018-09-10T09:47:55Z","abstract_excerpt":"Acoustic cloaking for the suppression of backscattering inside ducts is proposed in the audible range where plane waves are curved around the object using the surface modes of the liner. It is numerically shown that a slowly varying resonant liner (e. g. based on an array of tubes) creates a zone of silence in which an object of arbitrary shape can be acoustically hidden for a wide range of frequencies. And then, a resonant liner has deflecting properties without reflection of the wavefront, which are close to an ideal invisibility cloak. This kind of cloaking is effective in a wide frequency "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.03219","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":"2026-05-18T00:06:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xsrl+qAcq2niurnK4gpa1nsuGiO9lYHlrXHqNetNpSHkdAJurZ9Q4vNUH46YBmkW3tilQZ2TpgAXtC/G2FyLBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T11:06:22.438752Z"},"content_sha256":"fe4126c21c4b271571004f33a0229f0d7df6475974873a234a3c76514f340ccc","schema_version":"1.0","event_id":"sha256:fe4126c21c4b271571004f33a0229f0d7df6475974873a234a3c76514f340ccc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7V5AH6CLO4PCDS6NSBOMSTKELG/bundle.json","state_url":"https://pith.science/pith/7V5AH6CLO4PCDS6NSBOMSTKELG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7V5AH6CLO4PCDS6NSBOMSTKELG/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":"2026-07-03T11:06:22Z","links":{"resolver":"https://pith.science/pith/7V5AH6CLO4PCDS6NSBOMSTKELG","bundle":"https://pith.science/pith/7V5AH6CLO4PCDS6NSBOMSTKELG/bundle.json","state":"https://pith.science/pith/7V5AH6CLO4PCDS6NSBOMSTKELG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7V5AH6CLO4PCDS6NSBOMSTKELG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7V5AH6CLO4PCDS6NSBOMSTKELG","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":"ebab1e1f4a0e60754d2a4da90c45beb280823a8bbbcb3eb60253f5a8873bdc03","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-09-10T09:47:55Z","title_canon_sha256":"cf19e04809b0d518a37cbc144a2adc01ad3f5032279133a8f55c0e5e9de1ffee"},"schema_version":"1.0","source":{"id":"1809.03219","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.03219","created_at":"2026-05-18T00:06:09Z"},{"alias_kind":"arxiv_version","alias_value":"1809.03219v1","created_at":"2026-05-18T00:06:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.03219","created_at":"2026-05-18T00:06:09Z"},{"alias_kind":"pith_short_12","alias_value":"7V5AH6CLO4PC","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7V5AH6CLO4PCDS6N","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7V5AH6CL","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:fe4126c21c4b271571004f33a0229f0d7df6475974873a234a3c76514f340ccc","target":"graph","created_at":"2026-05-18T00:06:09Z","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"},"paper":{"abstract_excerpt":"Acoustic cloaking for the suppression of backscattering inside ducts is proposed in the audible range where plane waves are curved around the object using the surface modes of the liner. It is numerically shown that a slowly varying resonant liner (e. g. based on an array of tubes) creates a zone of silence in which an object of arbitrary shape can be acoustically hidden for a wide range of frequencies. And then, a resonant liner has deflecting properties without reflection of the wavefront, which are close to an ideal invisibility cloak. This kind of cloaking is effective in a wide frequency ","authors_text":"Maaz Farooqui, Vincent Pagneux, Yves Aur\\'egan","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-09-10T09:47:55Z","title":"Using liner surface modes in ducts to make obstacles reflectionless"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.03219","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:cfa90b811fe7cbd667fdf26e6787ee73dbb7305e9a28461dc9b7d47f53fd684f","target":"record","created_at":"2026-05-18T00:06:09Z","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":"ebab1e1f4a0e60754d2a4da90c45beb280823a8bbbcb3eb60253f5a8873bdc03","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-09-10T09:47:55Z","title_canon_sha256":"cf19e04809b0d518a37cbc144a2adc01ad3f5032279133a8f55c0e5e9de1ffee"},"schema_version":"1.0","source":{"id":"1809.03219","kind":"arxiv","version":1}},"canonical_sha256":"fd7a03f84b771e21cbcd905cc94d44598f3c55eecbea3ce1f5a9e6f6934c7ff9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fd7a03f84b771e21cbcd905cc94d44598f3c55eecbea3ce1f5a9e6f6934c7ff9","first_computed_at":"2026-05-18T00:06:09.601527Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:09.601527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RTuIE/QLMsK/F7ulcScYEuzmBRi/X1lkt2IJ7RhbBthPqQMC/zWsHkOzlIntcRn1kGIecY0ayccwZDtaX4uADw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:09.602248Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.03219","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cfa90b811fe7cbd667fdf26e6787ee73dbb7305e9a28461dc9b7d47f53fd684f","sha256:fe4126c21c4b271571004f33a0229f0d7df6475974873a234a3c76514f340ccc"],"state_sha256":"d56410200435a6806ccd9e97ceb20239389f89e1f52171e534dc218a8300781e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YCdunsp/kHIMv0hwaJXJU2l+k/z31eC4R/m15SMLsO3BoyoUN1VC8dxVbzeHB64skK8WsOHxmAXkfjfFt3S9DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-03T11:06:22.440749Z","bundle_sha256":"8a0ecb89c7c920f3d40adc8f9884236c60cd74d515f098015d366f684ef8a01f"}}