{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:CNS7A6EFHZCZRCYQBI5OTJOKKT","short_pith_number":"pith:CNS7A6EF","canonical_record":{"source":{"id":"1803.03510","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-03-09T13:57:31Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"4abe0f8b5c9b57b9376a996c137782771323622ca64c14730dfe4b274de12238","abstract_canon_sha256":"2093712ec775ce517c81b6f165b7d5e09d30c15d4ddfc3f91c6f8d87e1869b8d"},"schema_version":"1.0"},"canonical_sha256":"1365f078853e45988b100a3ae9a5ca54e6ec6ea6c2be0d0d78db7bbb3d39395a","source":{"kind":"arxiv","id":"1803.03510","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.03510","created_at":"2026-05-18T00:21:39Z"},{"alias_kind":"arxiv_version","alias_value":"1803.03510v1","created_at":"2026-05-18T00:21:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.03510","created_at":"2026-05-18T00:21:39Z"},{"alias_kind":"pith_short_12","alias_value":"CNS7A6EFHZCZ","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CNS7A6EFHZCZRCYQ","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CNS7A6EF","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:CNS7A6EFHZCZRCYQBI5OTJOKKT","target":"record","payload":{"canonical_record":{"source":{"id":"1803.03510","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-03-09T13:57:31Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"4abe0f8b5c9b57b9376a996c137782771323622ca64c14730dfe4b274de12238","abstract_canon_sha256":"2093712ec775ce517c81b6f165b7d5e09d30c15d4ddfc3f91c6f8d87e1869b8d"},"schema_version":"1.0"},"canonical_sha256":"1365f078853e45988b100a3ae9a5ca54e6ec6ea6c2be0d0d78db7bbb3d39395a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:21:39.314576Z","signature_b64":"2lL+BFTcm3LmRD6r4a8crA8gfho+/aRuXYucB4I6IQqODKRBCiZzxBmdleKL1F4FhqV1yky5vEFQg2fsIKidAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1365f078853e45988b100a3ae9a5ca54e6ec6ea6c2be0d0d78db7bbb3d39395a","last_reissued_at":"2026-05-18T00:21:39.313884Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:21:39.313884Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.03510","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":"2026-05-18T00:21:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oadmE8DsMGkNYgEh5fXt+Sh1W2bw1EC6Ai978TlbxpX6ISqaS4NsyEK/VNV+nna3dyjHH88yXisThO74umrnAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T15:58:06.882484Z"},"content_sha256":"2e8cae80f28a5520608988e277374eaa219bd45c5574a64b33c1a4da351ad8b1","schema_version":"1.0","event_id":"sha256:2e8cae80f28a5520608988e277374eaa219bd45c5574a64b33c1a4da351ad8b1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:CNS7A6EFHZCZRCYQBI5OTJOKKT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bloch wave filtering in tetrachiral materials via mechanical tuning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"Andrea Bacigalupo, Francesca Vadal\\`a, Luigi Gambarotta, Marco Lepidi","submitted_at":"2018-03-09T13:57:31Z","abstract_excerpt":"The periodic cellular topology characterizing the microscale structure of a heterogeneous material may allow the finest functional customization of its acoustic dispersion properties. The paper addresses the free propagation of elastic waves in micro-structured cellular materials. Focus is on the alternative formulations suited to describe the wave propagation in the material, according to the classic canons of solid or structural mechanics. Adopting the centrosymmetric tetrachiral microstructure as prototypical periodic cell, the frequency dispersion spectrum resulting from a synthetic lagran"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.03510","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":"2026-05-18T00:21:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i99ZIZTwpI5n/iG4nWwnnDQozOt94SPTUbjNQuPkxEnpHicyd7SJnX583jp3damWrBwVRl1lTYFsEPIC48m6DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T15:58:06.882844Z"},"content_sha256":"bebb2d6408835306ec29b1326e70b01c84ef8293f2b7dbb836b6b892a79d5581","schema_version":"1.0","event_id":"sha256:bebb2d6408835306ec29b1326e70b01c84ef8293f2b7dbb836b6b892a79d5581"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CNS7A6EFHZCZRCYQBI5OTJOKKT/bundle.json","state_url":"https://pith.science/pith/CNS7A6EFHZCZRCYQBI5OTJOKKT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CNS7A6EFHZCZRCYQBI5OTJOKKT/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":"2026-06-01T15:58:06Z","links":{"resolver":"https://pith.science/pith/CNS7A6EFHZCZRCYQBI5OTJOKKT","bundle":"https://pith.science/pith/CNS7A6EFHZCZRCYQBI5OTJOKKT/bundle.json","state":"https://pith.science/pith/CNS7A6EFHZCZRCYQBI5OTJOKKT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CNS7A6EFHZCZRCYQBI5OTJOKKT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CNS7A6EFHZCZRCYQBI5OTJOKKT","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":"2093712ec775ce517c81b6f165b7d5e09d30c15d4ddfc3f91c6f8d87e1869b8d","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-03-09T13:57:31Z","title_canon_sha256":"4abe0f8b5c9b57b9376a996c137782771323622ca64c14730dfe4b274de12238"},"schema_version":"1.0","source":{"id":"1803.03510","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.03510","created_at":"2026-05-18T00:21:39Z"},{"alias_kind":"arxiv_version","alias_value":"1803.03510v1","created_at":"2026-05-18T00:21:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.03510","created_at":"2026-05-18T00:21:39Z"},{"alias_kind":"pith_short_12","alias_value":"CNS7A6EFHZCZ","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CNS7A6EFHZCZRCYQ","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CNS7A6EF","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:bebb2d6408835306ec29b1326e70b01c84ef8293f2b7dbb836b6b892a79d5581","target":"graph","created_at":"2026-05-18T00:21:39Z","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":"The periodic cellular topology characterizing the microscale structure of a heterogeneous material may allow the finest functional customization of its acoustic dispersion properties. The paper addresses the free propagation of elastic waves in micro-structured cellular materials. Focus is on the alternative formulations suited to describe the wave propagation in the material, according to the classic canons of solid or structural mechanics. Adopting the centrosymmetric tetrachiral microstructure as prototypical periodic cell, the frequency dispersion spectrum resulting from a synthetic lagran","authors_text":"Andrea Bacigalupo, Francesca Vadal\\`a, Luigi Gambarotta, Marco Lepidi","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-03-09T13:57:31Z","title":"Bloch wave filtering in tetrachiral materials via mechanical tuning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.03510","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":"sha256:2e8cae80f28a5520608988e277374eaa219bd45c5574a64b33c1a4da351ad8b1","target":"record","created_at":"2026-05-18T00:21:39Z","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":"2093712ec775ce517c81b6f165b7d5e09d30c15d4ddfc3f91c6f8d87e1869b8d","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-03-09T13:57:31Z","title_canon_sha256":"4abe0f8b5c9b57b9376a996c137782771323622ca64c14730dfe4b274de12238"},"schema_version":"1.0","source":{"id":"1803.03510","kind":"arxiv","version":1}},"canonical_sha256":"1365f078853e45988b100a3ae9a5ca54e6ec6ea6c2be0d0d78db7bbb3d39395a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1365f078853e45988b100a3ae9a5ca54e6ec6ea6c2be0d0d78db7bbb3d39395a","first_computed_at":"2026-05-18T00:21:39.313884Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:21:39.313884Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2lL+BFTcm3LmRD6r4a8crA8gfho+/aRuXYucB4I6IQqODKRBCiZzxBmdleKL1F4FhqV1yky5vEFQg2fsIKidAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:21:39.314576Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.03510","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2e8cae80f28a5520608988e277374eaa219bd45c5574a64b33c1a4da351ad8b1","sha256:bebb2d6408835306ec29b1326e70b01c84ef8293f2b7dbb836b6b892a79d5581"],"state_sha256":"8d9a073dd605062ad11e926e0fb7218dc12c7a1e05ba0fbae2410072cf06ff5c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EHJS6Y2vYMWXYfcw4C9NXQwtzynC+X68QfJ3c/Xe/jOK2yGY/BVTJVCQy0VnTJ2xu1kH5Tm2dsKb3VDIhl2XAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T15:58:06.884895Z","bundle_sha256":"aae9e150f363916351c1a8bc5bc01706f81412c0d0fc82096d9845a7a0918d5f"}}