{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:PYWGKQM6AWKU75MSP45RZLLONM","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":"acb663c4ab68ec92ffb1b5c43c5da5c996f9ac480ed4e0284523f882abc863bb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2024-11-20T12:58:36Z","title_canon_sha256":"32c3e330c85ef6ab218543e424372ae2f3b8039022ef38a3dcac971da05c3b35"},"schema_version":"1.0","source":{"id":"2411.13289","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2411.13289","created_at":"2026-07-05T09:38:08Z"},{"alias_kind":"arxiv_version","alias_value":"2411.13289v1","created_at":"2026-07-05T09:38:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2411.13289","created_at":"2026-07-05T09:38:08Z"},{"alias_kind":"pith_short_12","alias_value":"PYWGKQM6AWKU","created_at":"2026-07-05T09:38:08Z"},{"alias_kind":"pith_short_16","alias_value":"PYWGKQM6AWKU75MS","created_at":"2026-07-05T09:38:08Z"},{"alias_kind":"pith_short_8","alias_value":"PYWGKQM6","created_at":"2026-07-05T09:38:08Z"}],"graph_snapshots":[{"event_id":"sha256:8cecc8447ec1e4c8f4c535226256aba80c5c4ec50cedc6a944ada0a5c8025595","target":"graph","created_at":"2026-07-05T09:38:08Z","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/2411.13289/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Human walking efficiency relies on the elastic recoil of the Achilles tendon, facilitated by a \"catapult mechanism\" that stores energy during stance and releases it during push-off. The catapult release mechanism could include the passive flexion of the knee, as the main part of knee flexion was reported to happen passively after leading leg touch-down. This study is the first to investigate the effects of passive versus active knee flexion initiation, using the bipedal EcoWalker-2 robot with passive ankles. By leveraging the precision of robotic measurements, we aimed to elucidate the importa","authors_text":"Alexander Badri-Spr\\\"owitz, Alexandra Buchmann, Bernadett Kiss, Daniel Renjewski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2024-11-20T12:58:36Z","title":"Passive knee flexion increases forward impulse of the trailing leg during the step-to-step transition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.13289","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":"sha256:606882f0dc9477e06a1f6fd53ae821c4f480e91b14dc1e0550fcb54ae7339b73","target":"record","created_at":"2026-07-05T09:38:08Z","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":"acb663c4ab68ec92ffb1b5c43c5da5c996f9ac480ed4e0284523f882abc863bb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2024-11-20T12:58:36Z","title_canon_sha256":"32c3e330c85ef6ab218543e424372ae2f3b8039022ef38a3dcac971da05c3b35"},"schema_version":"1.0","source":{"id":"2411.13289","kind":"arxiv","version":1}},"canonical_sha256":"7e2c65419e05954ff5927f3b1cad6e6b2d7d6fa5232a16940f48be0b38f6628e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7e2c65419e05954ff5927f3b1cad6e6b2d7d6fa5232a16940f48be0b38f6628e","first_computed_at":"2026-07-05T09:38:08.065381Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:38:08.065381Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AhhEzHfwp8UnuiovZWBbldeemxrwze9a/mEcsjCXPE1iM/C+i7E9ULlvXSBbvBwHirglmEtJb9A6+eJ7OKR+Ag==","signature_status":"signed_v1","signed_at":"2026-07-05T09:38:08.065835Z","signed_message":"canonical_sha256_bytes"},"source_id":"2411.13289","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:606882f0dc9477e06a1f6fd53ae821c4f480e91b14dc1e0550fcb54ae7339b73","sha256:8cecc8447ec1e4c8f4c535226256aba80c5c4ec50cedc6a944ada0a5c8025595"],"state_sha256":"228c08b4941050e8ccb73abff74b4cff36c16941ac39faf2f0b8499a1bc5fe75"}