{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:IQL2A3G2HNE2TGZ5AYZCUG2AGS","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":"312a800da906f1850cd443c27132c94915356df261cf08f39c86edc4f4aa4f38","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-05-29T12:30:53Z","title_canon_sha256":"1562727769a5036d26e2784528b99d0fa8596eced0beb18c068e2aaee0dba892"},"schema_version":"1.0","source":{"id":"2605.31227","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.31227","created_at":"2026-06-01T01:04:04Z"},{"alias_kind":"arxiv_version","alias_value":"2605.31227v1","created_at":"2026-06-01T01:04:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.31227","created_at":"2026-06-01T01:04:04Z"},{"alias_kind":"pith_short_12","alias_value":"IQL2A3G2HNE2","created_at":"2026-06-01T01:04:04Z"},{"alias_kind":"pith_short_16","alias_value":"IQL2A3G2HNE2TGZ5","created_at":"2026-06-01T01:04:04Z"},{"alias_kind":"pith_short_8","alias_value":"IQL2A3G2","created_at":"2026-06-01T01:04:04Z"}],"graph_snapshots":[{"event_id":"sha256:9b3a319e122d54700f3c1907f495e181d6d5291b02fc31030b17d563dbffe603","target":"graph","created_at":"2026-06-01T01:04:04Z","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/2605.31227/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Procedural activities follow well-defined structures: whether we consider a cooking recipe or a mechanic repairing a car, these activities naturally decompose in a hierarchy of steps and sub-steps. Traditional approaches for step grounding require extensive annotations and scale poorly. Instead, we argue that such hierarchical structure can emerge naturally from uncurated videos of human activities through recurring patterns of co-occurring actions and activities. Our approach builds on HiERO, a weakly-supervised representation learning approach that maps close in the feature space actions tha","authors_text":"Andrea Zenotto, Francesca Pistilli, Giuseppe Averta, Simone Alberto Peirone","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-05-29T12:30:53Z","title":"HiERO-StepG @ Ego4D Step Grounding Challenge: hierarchical activity understanding enables zero-shot step grounding"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.31227","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":"sha256:509b1740b208a6de0ff64946780e547e8b8a2280572eab41cc45f343cb26b3b2","target":"record","created_at":"2026-06-01T01:04:04Z","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":"312a800da906f1850cd443c27132c94915356df261cf08f39c86edc4f4aa4f38","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-05-29T12:30:53Z","title_canon_sha256":"1562727769a5036d26e2784528b99d0fa8596eced0beb18c068e2aaee0dba892"},"schema_version":"1.0","source":{"id":"2605.31227","kind":"arxiv","version":1}},"canonical_sha256":"4417a06cda3b49a99b3d06322a1b40349ef6b1cda64f82c842f5811096df7c08","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4417a06cda3b49a99b3d06322a1b40349ef6b1cda64f82c842f5811096df7c08","first_computed_at":"2026-06-01T01:04:04.970822Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-01T01:04:04.970822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"c42SgI9zgtloGnOzrhysbUANyqfhwTP9Oj2pmVspKtzGdoHCUBpJVX49ZxRrve/9iPfJhvrHK3845bf7d95uDg==","signature_status":"signed_v1","signed_at":"2026-06-01T01:04:04.971753Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.31227","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:509b1740b208a6de0ff64946780e547e8b8a2280572eab41cc45f343cb26b3b2","sha256:9b3a319e122d54700f3c1907f495e181d6d5291b02fc31030b17d563dbffe603"],"state_sha256":"7d3ae8aeaa04ed7733e514399465ce5c86c8e4ad790d51a60b450e5bd25ffbfb"}