{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:CVXACHEOB2P2W3WUCBQGQI24NE","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":"552110d5923b678f9c9e6ee65f7b47d4dc6f445ebf7bc4fce708a6823965f47b","cross_cats_sorted":["cond-mat.dis-nn","cs.ET","cs.SD","eess.AS","physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-11-14T16:11:26Z","title_canon_sha256":"15d8820ff010318ac6ee62af324cc823d24cadc15024f95672ce98001b145359"},"schema_version":"1.0","source":{"id":"2111.08503","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.08503","created_at":"2026-07-05T06:28:30Z"},{"alias_kind":"arxiv_version","alias_value":"2111.08503v2","created_at":"2026-07-05T06:28:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.08503","created_at":"2026-07-05T06:28:30Z"},{"alias_kind":"pith_short_12","alias_value":"CVXACHEOB2P2","created_at":"2026-07-05T06:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"CVXACHEOB2P2W3WU","created_at":"2026-07-05T06:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"CVXACHEO","created_at":"2026-07-05T06:28:30Z"}],"graph_snapshots":[{"event_id":"sha256:b6e1d59498ce9c1662994a0571b9e2dc633ce441fa4153d9ce9bf91fe862d090","target":"graph","created_at":"2026-07-05T06:28:30Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2111.08503/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Mitigating the energy requirements of artificial intelligence requires novel physical substrates for computation. Phononic metamaterials have a vanishingly low power dissipation and hence are a prime candidate for green, always-on computers. However, their use in machine learning applications has not been explored due to the complexity of their design process: Current phononic metamaterials are restricted to simple geometries (e.g. periodic, tapered), and hence do not possess sufficient expressivity to encode machine learning tasks. We design and fabricate a non-periodic phononic metamaterial,","authors_text":"Christoph B\\\"arlocher, Daniel Moreno-Garcia, Dirk-Jan van Manen, Fredrik Andersson, Henrik R. Thomsen, Johan O.A. Robertsson, Lars Gebraad, Luis Guillermo Villanueva, Marc Serra-Garcia, Parisa Omidvar, Sebastian D. Huber, Tena Dub\\v{c}ek, Theodor S. Becker, Thomas Haag","cross_cats":["cond-mat.dis-nn","cs.ET","cs.SD","eess.AS","physics.app-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-11-14T16:11:26Z","title":"Binary classification of spoken words with passive phononic metamaterials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.08503","kind":"arxiv","version":2},"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":"sha256:2e6e1013269bd0a68734732cee6f7d1adb6ff8b53430fbb21d701ddec6e2a65d","target":"record","created_at":"2026-07-05T06:28:30Z","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":"552110d5923b678f9c9e6ee65f7b47d4dc6f445ebf7bc4fce708a6823965f47b","cross_cats_sorted":["cond-mat.dis-nn","cs.ET","cs.SD","eess.AS","physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-11-14T16:11:26Z","title_canon_sha256":"15d8820ff010318ac6ee62af324cc823d24cadc15024f95672ce98001b145359"},"schema_version":"1.0","source":{"id":"2111.08503","kind":"arxiv","version":2}},"canonical_sha256":"156e011c8e0e9fab6ed4106068235c690571a408469ca5b5571d746811f69fd5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"156e011c8e0e9fab6ed4106068235c690571a408469ca5b5571d746811f69fd5","first_computed_at":"2026-07-05T06:28:30.276070Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:28:30.276070Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZveC9MYMGzoYwr1FVBGwIJ5+mg8jkHO2XHOo7rZm65o+gWdYbE1NzLU26Q7xNC9mn7UECNKiNy3UX0OATFCiAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T06:28:30.276582Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.08503","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2e6e1013269bd0a68734732cee6f7d1adb6ff8b53430fbb21d701ddec6e2a65d","sha256:b6e1d59498ce9c1662994a0571b9e2dc633ce441fa4153d9ce9bf91fe862d090"],"state_sha256":"f2e6b671331777dc02468bdcc71244724007f61ed79957a7403ef4fe74c34064"}