{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:NHWPIHEH3E3IFW4X2E7ZGNH3NX","short_pith_number":"pith:NHWPIHEH","canonical_record":{"source":{"id":"2504.00044","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2025-03-30T22:04:14Z","cross_cats_sorted":["cs.CL","cs.DC","cs.NE"],"title_canon_sha256":"3f17e9f42189205ab8b68ab1629a52e160dfaea6c20bd28b6fa1912f09c71112","abstract_canon_sha256":"ddc72c4ceedb5274c2d9a2ee98fd1fb4c84002f80a1eaaaf5bca06eea46b3c1e"},"schema_version":"1.0"},"canonical_sha256":"69ecf41c87d93682db97d13f9334fb6df4f845663ed3ab2aa6f1099363950192","source":{"kind":"arxiv","id":"2504.00044","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.00044","created_at":"2026-07-05T10:52:58Z"},{"alias_kind":"arxiv_version","alias_value":"2504.00044v2","created_at":"2026-07-05T10:52:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.00044","created_at":"2026-07-05T10:52:58Z"},{"alias_kind":"pith_short_12","alias_value":"NHWPIHEH3E3I","created_at":"2026-07-05T10:52:58Z"},{"alias_kind":"pith_short_16","alias_value":"NHWPIHEH3E3IFW4X","created_at":"2026-07-05T10:52:58Z"},{"alias_kind":"pith_short_8","alias_value":"NHWPIHEH","created_at":"2026-07-05T10:52:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:NHWPIHEH3E3IFW4X2E7ZGNH3NX","target":"record","payload":{"canonical_record":{"source":{"id":"2504.00044","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2025-03-30T22:04:14Z","cross_cats_sorted":["cs.CL","cs.DC","cs.NE"],"title_canon_sha256":"3f17e9f42189205ab8b68ab1629a52e160dfaea6c20bd28b6fa1912f09c71112","abstract_canon_sha256":"ddc72c4ceedb5274c2d9a2ee98fd1fb4c84002f80a1eaaaf5bca06eea46b3c1e"},"schema_version":"1.0"},"canonical_sha256":"69ecf41c87d93682db97d13f9334fb6df4f845663ed3ab2aa6f1099363950192","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:52:58.782247Z","signature_b64":"BFI7fkVR2osyDcV+HEuLj5GPiNf0GCxJDZGhPkhU2weCcKZfMpcyP6jxnswPRsX32Nvlka1XcQveXmJSxOGpCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"69ecf41c87d93682db97d13f9334fb6df4f845663ed3ab2aa6f1099363950192","last_reissued_at":"2026-07-05T10:52:58.781787Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:52:58.781787Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.00044","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:52:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BS73tMMn4I1JblNpFSsfkfMoCOIFdl+cuAm0K4Bhr0W834PgqB2xCGpCBuvqwQjDIapvf9f0ZsX3nc4Py1TwAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:33:08.403976Z"},"content_sha256":"daaa2adfdb86af84fca27be86ba48f0093e74e93cf441211e05d8a38ef6c9569","schema_version":"1.0","event_id":"sha256:daaa2adfdb86af84fca27be86ba48f0093e74e93cf441211e05d8a38ef6c9569"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:NHWPIHEH3E3IFW4X2E7ZGNH3NX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dynamic hashtag recommendation in social media with trend shift detection and adaptation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CL","cs.DC","cs.NE"],"primary_cat":"cs.SI","authors_text":"Alessio Orsino, Domenico Talia, Fabrizio Marozzo, Paolo Trunfio, Riccardo Cantini","submitted_at":"2025-03-30T22:04:14Z","abstract_excerpt":"Hashtag recommendation systems have emerged as a key tool for automatically suggesting relevant hashtags and enhancing content categorization and search. However, existing static models struggle to adapt to the highly dynamic nature of social media conversations, where new hashtags constantly emerge and existing ones undergo semantic shifts. To address these challenges, this paper introduces H-ADAPTS (Hashtag recommendAtion by Detecting and adAPting to Trend Shifts), a dynamic hashtag recommendation methodology that employs a trend-aware mechanism to detect shifts in hashtag usage-reflecting e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.00044","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2504.00044/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T10:52:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Kjzp83FMbKB60A4mXXbfMU1GDFdkHkRlc6Cv+OFG4gdiBG2FPX3FTPGzUA1KBDaJbvNK8yD2hQwd2dx7fwpZDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:33:08.404483Z"},"content_sha256":"f065167a100fcc7c189410ae4192aaeec930fc733aed4cab9ef413b611eb2bf5","schema_version":"1.0","event_id":"sha256:f065167a100fcc7c189410ae4192aaeec930fc733aed4cab9ef413b611eb2bf5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NHWPIHEH3E3IFW4X2E7ZGNH3NX/bundle.json","state_url":"https://pith.science/pith/NHWPIHEH3E3IFW4X2E7ZGNH3NX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NHWPIHEH3E3IFW4X2E7ZGNH3NX/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":"2026-08-03T16:33:08Z","links":{"resolver":"https://pith.science/pith/NHWPIHEH3E3IFW4X2E7ZGNH3NX","bundle":"https://pith.science/pith/NHWPIHEH3E3IFW4X2E7ZGNH3NX/bundle.json","state":"https://pith.science/pith/NHWPIHEH3E3IFW4X2E7ZGNH3NX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NHWPIHEH3E3IFW4X2E7ZGNH3NX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:NHWPIHEH3E3IFW4X2E7ZGNH3NX","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":"ddc72c4ceedb5274c2d9a2ee98fd1fb4c84002f80a1eaaaf5bca06eea46b3c1e","cross_cats_sorted":["cs.CL","cs.DC","cs.NE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2025-03-30T22:04:14Z","title_canon_sha256":"3f17e9f42189205ab8b68ab1629a52e160dfaea6c20bd28b6fa1912f09c71112"},"schema_version":"1.0","source":{"id":"2504.00044","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.00044","created_at":"2026-07-05T10:52:58Z"},{"alias_kind":"arxiv_version","alias_value":"2504.00044v2","created_at":"2026-07-05T10:52:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.00044","created_at":"2026-07-05T10:52:58Z"},{"alias_kind":"pith_short_12","alias_value":"NHWPIHEH3E3I","created_at":"2026-07-05T10:52:58Z"},{"alias_kind":"pith_short_16","alias_value":"NHWPIHEH3E3IFW4X","created_at":"2026-07-05T10:52:58Z"},{"alias_kind":"pith_short_8","alias_value":"NHWPIHEH","created_at":"2026-07-05T10:52:58Z"}],"graph_snapshots":[{"event_id":"sha256:f065167a100fcc7c189410ae4192aaeec930fc733aed4cab9ef413b611eb2bf5","target":"graph","created_at":"2026-07-05T10:52:58Z","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/2504.00044/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Hashtag recommendation systems have emerged as a key tool for automatically suggesting relevant hashtags and enhancing content categorization and search. However, existing static models struggle to adapt to the highly dynamic nature of social media conversations, where new hashtags constantly emerge and existing ones undergo semantic shifts. To address these challenges, this paper introduces H-ADAPTS (Hashtag recommendAtion by Detecting and adAPting to Trend Shifts), a dynamic hashtag recommendation methodology that employs a trend-aware mechanism to detect shifts in hashtag usage-reflecting e","authors_text":"Alessio Orsino, Domenico Talia, Fabrizio Marozzo, Paolo Trunfio, Riccardo Cantini","cross_cats":["cs.CL","cs.DC","cs.NE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2025-03-30T22:04:14Z","title":"Dynamic hashtag recommendation in social media with trend shift detection and adaptation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.00044","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:daaa2adfdb86af84fca27be86ba48f0093e74e93cf441211e05d8a38ef6c9569","target":"record","created_at":"2026-07-05T10:52:58Z","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":"ddc72c4ceedb5274c2d9a2ee98fd1fb4c84002f80a1eaaaf5bca06eea46b3c1e","cross_cats_sorted":["cs.CL","cs.DC","cs.NE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2025-03-30T22:04:14Z","title_canon_sha256":"3f17e9f42189205ab8b68ab1629a52e160dfaea6c20bd28b6fa1912f09c71112"},"schema_version":"1.0","source":{"id":"2504.00044","kind":"arxiv","version":2}},"canonical_sha256":"69ecf41c87d93682db97d13f9334fb6df4f845663ed3ab2aa6f1099363950192","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"69ecf41c87d93682db97d13f9334fb6df4f845663ed3ab2aa6f1099363950192","first_computed_at":"2026-07-05T10:52:58.781787Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:52:58.781787Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BFI7fkVR2osyDcV+HEuLj5GPiNf0GCxJDZGhPkhU2weCcKZfMpcyP6jxnswPRsX32Nvlka1XcQveXmJSxOGpCA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:52:58.782247Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.00044","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:daaa2adfdb86af84fca27be86ba48f0093e74e93cf441211e05d8a38ef6c9569","sha256:f065167a100fcc7c189410ae4192aaeec930fc733aed4cab9ef413b611eb2bf5"],"state_sha256":"ee196f92438ba60bbb9426800e1f76c9a6027b5691ee1f66744f4e7ceb8121c0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WaKzWG68uv7G3jmXNG5ztb1hRgb3X98RD6NKIzp5hOfvSKr1h7F2iEz35Vi0+9Ro8BX2IgYDU6OGytoY/WnpBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T16:33:08.408143Z","bundle_sha256":"c0f8150f4c1a27477548044769473db00208536cf9e55712260d0cbe052d3217"}}