{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:WTBGMNOO3YR7SICQR5ONVKCPSJ","short_pith_number":"pith:WTBGMNOO","schema_version":"1.0","canonical_sha256":"b4c26635cede23f920508f5cdaa84f9273484ba11cfefac927c24bd1de7607c4","source":{"kind":"arxiv","id":"1904.06315","version":1},"attestation_state":"computed","paper":{"title":"Acoustic cloaking: geometric transform, homogenization and a genetic algorithm","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","physics.app-ph"],"primary_cat":"physics.comp-ph","authors_text":"C\\'edric Payan, Lucas Pomot, Marcel Remillieux, S\\'ebastien Guenneau","submitted_at":"2019-04-12T16:46:05Z","abstract_excerpt":"A general process is proposed to experimentally design anisotropic inhomogeneous metamaterials obtained through a change of coordinate in the Helmholtz equation. The method is applied to the case of a cylindrical transformation that allows to perform cloaking. To approximate such complex metamaterials we apply results of the theory of homogenization and combine them with a genetic algorithm. To illustrate the power of our approach, we design three types of cloaks composed of isotropic concentric layers structured with three types of perforations: curved rectangles, split rings and crosses. The"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1904.06315","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2019-04-12T16:46:05Z","cross_cats_sorted":["cond-mat.mtrl-sci","physics.app-ph"],"title_canon_sha256":"d0d1d2e2ea616a8401ed39c9f116f071e03edcf09eaa348d33d0a33358862218","abstract_canon_sha256":"c9968b63125c268ab52e2c5065a2d51b11788b60be4a38ea3eba89cbbb85c8f6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:48:43.610474Z","signature_b64":"c0wjOoMgCUd3euO4emB9IB8YnnbHPsHuTbvMWq7NKSTMX6p1UPPfJVQGG9b6U2otRYw8ra4tnQTEbVvsdxX+Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b4c26635cede23f920508f5cdaa84f9273484ba11cfefac927c24bd1de7607c4","last_reissued_at":"2026-05-17T23:48:43.610023Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:48:43.610023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Acoustic cloaking: geometric transform, homogenization and a genetic algorithm","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","physics.app-ph"],"primary_cat":"physics.comp-ph","authors_text":"C\\'edric Payan, Lucas Pomot, Marcel Remillieux, S\\'ebastien Guenneau","submitted_at":"2019-04-12T16:46:05Z","abstract_excerpt":"A general process is proposed to experimentally design anisotropic inhomogeneous metamaterials obtained through a change of coordinate in the Helmholtz equation. The method is applied to the case of a cylindrical transformation that allows to perform cloaking. To approximate such complex metamaterials we apply results of the theory of homogenization and combine them with a genetic algorithm. To illustrate the power of our approach, we design three types of cloaks composed of isotropic concentric layers structured with three types of perforations: curved rectangles, split rings and crosses. The"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.06315","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1904.06315","created_at":"2026-05-17T23:48:43.610082+00:00"},{"alias_kind":"arxiv_version","alias_value":"1904.06315v1","created_at":"2026-05-17T23:48:43.610082+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.06315","created_at":"2026-05-17T23:48:43.610082+00:00"},{"alias_kind":"pith_short_12","alias_value":"WTBGMNOO3YR7","created_at":"2026-05-18T12:33:30.264802+00:00"},{"alias_kind":"pith_short_16","alias_value":"WTBGMNOO3YR7SICQ","created_at":"2026-05-18T12:33:30.264802+00:00"},{"alias_kind":"pith_short_8","alias_value":"WTBGMNOO","created_at":"2026-05-18T12:33:30.264802+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/WTBGMNOO3YR7SICQR5ONVKCPSJ","json":"https://pith.science/pith/WTBGMNOO3YR7SICQR5ONVKCPSJ.json","graph_json":"https://pith.science/api/pith-number/WTBGMNOO3YR7SICQR5ONVKCPSJ/graph.json","events_json":"https://pith.science/api/pith-number/WTBGMNOO3YR7SICQR5ONVKCPSJ/events.json","paper":"https://pith.science/paper/WTBGMNOO"},"agent_actions":{"view_html":"https://pith.science/pith/WTBGMNOO3YR7SICQR5ONVKCPSJ","download_json":"https://pith.science/pith/WTBGMNOO3YR7SICQR5ONVKCPSJ.json","view_paper":"https://pith.science/paper/WTBGMNOO","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1904.06315&json=true","fetch_graph":"https://pith.science/api/pith-number/WTBGMNOO3YR7SICQR5ONVKCPSJ/graph.json","fetch_events":"https://pith.science/api/pith-number/WTBGMNOO3YR7SICQR5ONVKCPSJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WTBGMNOO3YR7SICQR5ONVKCPSJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WTBGMNOO3YR7SICQR5ONVKCPSJ/action/storage_attestation","attest_author":"https://pith.science/pith/WTBGMNOO3YR7SICQR5ONVKCPSJ/action/author_attestation","sign_citation":"https://pith.science/pith/WTBGMNOO3YR7SICQR5ONVKCPSJ/action/citation_signature","submit_replication":"https://pith.science/pith/WTBGMNOO3YR7SICQR5ONVKCPSJ/action/replication_record"}},"created_at":"2026-05-17T23:48:43.610082+00:00","updated_at":"2026-05-17T23:48:43.610082+00:00"}