{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:X4H2Z6UACG3NFGBF4E42FH5QHR","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":"2d6fa1cfb45e39ac6abc78c87a6834d28b58122ba85d4fb1cc40621701bd4ada","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2021-04-24T20:18:53Z","title_canon_sha256":"96ca5629a490fe9a129888ec1606d4afaf80741f73ef98204ad8c1cc3395dac9"},"schema_version":"1.0","source":{"id":"2104.12016","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.12016","created_at":"2026-07-05T02:34:52Z"},{"alias_kind":"arxiv_version","alias_value":"2104.12016v1","created_at":"2026-07-05T02:34:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.12016","created_at":"2026-07-05T02:34:52Z"},{"alias_kind":"pith_short_12","alias_value":"X4H2Z6UACG3N","created_at":"2026-07-05T02:34:52Z"},{"alias_kind":"pith_short_16","alias_value":"X4H2Z6UACG3NFGBF","created_at":"2026-07-05T02:34:52Z"},{"alias_kind":"pith_short_8","alias_value":"X4H2Z6UA","created_at":"2026-07-05T02:34:52Z"}],"graph_snapshots":[{"event_id":"sha256:0e8b403e1ce115a69f96cd1119483de57a0cb9ff15d02581c8f85d5a79756c07","target":"graph","created_at":"2026-07-05T02:34:52Z","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/2104.12016/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Neural information retrieval systems typically use a cascading pipeline, in which a first-stage model retrieves a candidate set of documents and one or more subsequent stages re-rank this set using contextualized language models such as BERT. In this paper, we propose DeepImpact, a new document term-weighting scheme suitable for efficient retrieval using a standard inverted index. Compared to existing methods, DeepImpact improves impact-score modeling and tackles the vocabulary-mismatch problem. In particular, DeepImpact leverages DocT5Query to enrich the document collection and, using a conte","authors_text":"Antonio Mallia, Nicola Tonellotto, Omar Khattab, Torsten Suel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2021-04-24T20:18:53Z","title":"Learning Passage Impacts for Inverted Indexes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.12016","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":"sha256:8e3a6d3da3f9b5c948daeb953e923255290bbc22b7b72a8810ff94cb4cc099b0","target":"record","created_at":"2026-07-05T02:34:52Z","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":"2d6fa1cfb45e39ac6abc78c87a6834d28b58122ba85d4fb1cc40621701bd4ada","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2021-04-24T20:18:53Z","title_canon_sha256":"96ca5629a490fe9a129888ec1606d4afaf80741f73ef98204ad8c1cc3395dac9"},"schema_version":"1.0","source":{"id":"2104.12016","kind":"arxiv","version":1}},"canonical_sha256":"bf0facfa8011b6d29825e139a29fb03c7411f79ac3da5aa4d4054a8c953e0cac","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bf0facfa8011b6d29825e139a29fb03c7411f79ac3da5aa4d4054a8c953e0cac","first_computed_at":"2026-07-05T02:34:52.689471Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:34:52.689471Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"15+FbySGOc7ulNNn4zRU3PWEzaddpcGwwmhRbG3rP0/07YxakN30W+HowNpG0VIlpra/11uHV8mnWRklLNyOBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:34:52.689898Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.12016","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e3a6d3da3f9b5c948daeb953e923255290bbc22b7b72a8810ff94cb4cc099b0","sha256:0e8b403e1ce115a69f96cd1119483de57a0cb9ff15d02581c8f85d5a79756c07"],"state_sha256":"8012c075939a23af0b3a6b1cbfbde0bb04e24057a1ba8b42a329644c01f1a97d"}