{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:UHVUSMIDPFZTC3XXYGFNIQ63OK","short_pith_number":"pith:UHVUSMID","canonical_record":{"source":{"id":"1510.08785","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2015-10-29T17:21:34Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"dbf724af165b8e00a558388c610cc0fbe54cb22a3545ba41ab5a45dac3e1d8a6","abstract_canon_sha256":"1372404047ebfb00e81a039ee91102e9f3570cc31d63d5b6160d944dbf6e2054"},"schema_version":"1.0"},"canonical_sha256":"a1eb4931037973316ef7c18ad443db72a093f6fd3e6c5bed323fefea250ac9c5","source":{"kind":"arxiv","id":"1510.08785","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.08785","created_at":"2026-05-18T01:22:50Z"},{"alias_kind":"arxiv_version","alias_value":"1510.08785v3","created_at":"2026-05-18T01:22:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.08785","created_at":"2026-05-18T01:22:50Z"},{"alias_kind":"pith_short_12","alias_value":"UHVUSMIDPFZT","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"UHVUSMIDPFZTC3XX","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"UHVUSMID","created_at":"2026-05-18T12:29:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:UHVUSMIDPFZTC3XXYGFNIQ63OK","target":"record","payload":{"canonical_record":{"source":{"id":"1510.08785","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2015-10-29T17:21:34Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"dbf724af165b8e00a558388c610cc0fbe54cb22a3545ba41ab5a45dac3e1d8a6","abstract_canon_sha256":"1372404047ebfb00e81a039ee91102e9f3570cc31d63d5b6160d944dbf6e2054"},"schema_version":"1.0"},"canonical_sha256":"a1eb4931037973316ef7c18ad443db72a093f6fd3e6c5bed323fefea250ac9c5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:50.340414Z","signature_b64":"31oAyFXXlDiug+1wYubbYfdQSNCjVGhWDetq8LtERUN0orJ3RD28/+zyYZE3Nd4pajovViiP0j1ZNX9l7BVtAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a1eb4931037973316ef7c18ad443db72a093f6fd3e6c5bed323fefea250ac9c5","last_reissued_at":"2026-05-18T01:22:50.339939Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:50.339939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.08785","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:22:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iZrsd+jOpjRN0n61rGHw30sDp1TNmgqAx4AtTxmMvVtjksZ4noUzrPGNlhs60RaaZi4wwAPMYZKsaauOIIhTDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T22:24:13.262524Z"},"content_sha256":"77239946bf5b4a3e6e5ec588c31353f9ce6d8e738cbaadb59d842f2e77aff496","schema_version":"1.0","event_id":"sha256:77239946bf5b4a3e6e5ec588c31353f9ce6d8e738cbaadb59d842f2e77aff496"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:UHVUSMIDPFZTC3XXYGFNIQ63OK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Auxetic-like metamaterials as novel earthquake protections","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.class-ph","authors_text":"Bogdan Ungureanu, S\\'ebastien Guenneau, Stefan Enoch, St\\'ephane Br\\^ul\\'e, Younes Achaoui","submitted_at":"2015-10-29T17:21:34Z","abstract_excerpt":"We propose that wave propagation through a class of mechanical metamaterials opens unprecedented avenues in seismic wave protection based on spectral properties of auxetic-like metamaterials. The elastic parameters of these metamaterials like the bulk and shear moduli, the mass density, and even the Poisson ratio, can exhibit negative values in elastic stop bands. We show here that the propagation of seismic waves with frequencies ranging from 1Hz to 40Hz can be influenced by a decameter scale version of auxetic-like metamaterials buried in the soil, with the combined effects of impedance mism"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.08785","kind":"arxiv","version":3},"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":"2026-05-18T01:22:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"znIQgQfDVTcmnfDQ6vMusTDSsOEU2RjmWWcEy9oWXI0x/gnoe8c3Lwvrpy3efYB+/X92RE5MpkBV66OTls7yBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T22:24:13.263218Z"},"content_sha256":"bba03aa13c12ccbeebef5db7639817d60b954a74ee5117c723c9acd517c0f994","schema_version":"1.0","event_id":"sha256:bba03aa13c12ccbeebef5db7639817d60b954a74ee5117c723c9acd517c0f994"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UHVUSMIDPFZTC3XXYGFNIQ63OK/bundle.json","state_url":"https://pith.science/pith/UHVUSMIDPFZTC3XXYGFNIQ63OK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UHVUSMIDPFZTC3XXYGFNIQ63OK/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":"2026-05-24T22:24:13Z","links":{"resolver":"https://pith.science/pith/UHVUSMIDPFZTC3XXYGFNIQ63OK","bundle":"https://pith.science/pith/UHVUSMIDPFZTC3XXYGFNIQ63OK/bundle.json","state":"https://pith.science/pith/UHVUSMIDPFZTC3XXYGFNIQ63OK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UHVUSMIDPFZTC3XXYGFNIQ63OK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:UHVUSMIDPFZTC3XXYGFNIQ63OK","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":"1372404047ebfb00e81a039ee91102e9f3570cc31d63d5b6160d944dbf6e2054","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2015-10-29T17:21:34Z","title_canon_sha256":"dbf724af165b8e00a558388c610cc0fbe54cb22a3545ba41ab5a45dac3e1d8a6"},"schema_version":"1.0","source":{"id":"1510.08785","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.08785","created_at":"2026-05-18T01:22:50Z"},{"alias_kind":"arxiv_version","alias_value":"1510.08785v3","created_at":"2026-05-18T01:22:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.08785","created_at":"2026-05-18T01:22:50Z"},{"alias_kind":"pith_short_12","alias_value":"UHVUSMIDPFZT","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"UHVUSMIDPFZTC3XX","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"UHVUSMID","created_at":"2026-05-18T12:29:44Z"}],"graph_snapshots":[{"event_id":"sha256:bba03aa13c12ccbeebef5db7639817d60b954a74ee5117c723c9acd517c0f994","target":"graph","created_at":"2026-05-18T01:22:50Z","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":"We propose that wave propagation through a class of mechanical metamaterials opens unprecedented avenues in seismic wave protection based on spectral properties of auxetic-like metamaterials. The elastic parameters of these metamaterials like the bulk and shear moduli, the mass density, and even the Poisson ratio, can exhibit negative values in elastic stop bands. We show here that the propagation of seismic waves with frequencies ranging from 1Hz to 40Hz can be influenced by a decameter scale version of auxetic-like metamaterials buried in the soil, with the combined effects of impedance mism","authors_text":"Bogdan Ungureanu, S\\'ebastien Guenneau, Stefan Enoch, St\\'ephane Br\\^ul\\'e, Younes Achaoui","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2015-10-29T17:21:34Z","title":"Auxetic-like metamaterials as novel earthquake protections"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.08785","kind":"arxiv","version":3},"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":"sha256:77239946bf5b4a3e6e5ec588c31353f9ce6d8e738cbaadb59d842f2e77aff496","target":"record","created_at":"2026-05-18T01:22:50Z","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":"1372404047ebfb00e81a039ee91102e9f3570cc31d63d5b6160d944dbf6e2054","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2015-10-29T17:21:34Z","title_canon_sha256":"dbf724af165b8e00a558388c610cc0fbe54cb22a3545ba41ab5a45dac3e1d8a6"},"schema_version":"1.0","source":{"id":"1510.08785","kind":"arxiv","version":3}},"canonical_sha256":"a1eb4931037973316ef7c18ad443db72a093f6fd3e6c5bed323fefea250ac9c5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1eb4931037973316ef7c18ad443db72a093f6fd3e6c5bed323fefea250ac9c5","first_computed_at":"2026-05-18T01:22:50.339939Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:50.339939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"31oAyFXXlDiug+1wYubbYfdQSNCjVGhWDetq8LtERUN0orJ3RD28/+zyYZE3Nd4pajovViiP0j1ZNX9l7BVtAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:50.340414Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.08785","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:77239946bf5b4a3e6e5ec588c31353f9ce6d8e738cbaadb59d842f2e77aff496","sha256:bba03aa13c12ccbeebef5db7639817d60b954a74ee5117c723c9acd517c0f994"],"state_sha256":"5573ac13c4dc94d7fa83ef098fee30c9fb6fec4201def96f198cc8113b7f1608"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h4Sq6OeCwBnLkwADJwQPRjK35WPCAKZN6MM23eil/TeEdbX8ydzNFfMKm7cHC/aJhOXqtOQt+FK9ZNIu2NGBDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T22:24:13.267246Z","bundle_sha256":"9307d4afbf1c8be7b1e7dc8908550fd43a9fec996122a7947d1c371d63debafb"}}