{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:AKC6ERHS3TBNPHNL5AW7IID2NZ","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":"97e7e594ec3de2e9436beebe522697fcf674eb68173441c8b8c6baa41181b053","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2014-12-28T06:07:48Z","title_canon_sha256":"4194187f09c52d7b8a307142f5a2e10ac4fc7581f1e13881913adc3c0f11ba5d"},"schema_version":"1.0","source":{"id":"1412.8118","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.8118","created_at":"2026-05-18T02:30:24Z"},{"alias_kind":"arxiv_version","alias_value":"1412.8118v1","created_at":"2026-05-18T02:30:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.8118","created_at":"2026-05-18T02:30:24Z"},{"alias_kind":"pith_short_12","alias_value":"AKC6ERHS3TBN","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"AKC6ERHS3TBNPHNL","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"AKC6ERHS","created_at":"2026-05-18T12:28:19Z"}],"graph_snapshots":[{"event_id":"sha256:cfa6bf9046515e164b22053deeb62adc1d3f70f396b80511ba93a080f620e8d1","target":"graph","created_at":"2026-05-18T02:30:24Z","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"},"paper":{"abstract_excerpt":"Most existing content-based filtering approaches learn user profiles independently without capturing the similarity among users. Bayesian hierarchical models \\cite{Zhang:Efficient} learn user profiles jointly and have the advantage of being able to borrow discriminative information from other users through a Bayesian prior. However, the standard Bayesian hierarchical models assume all user profiles are generated from the same prior. Considering the diversity of user interests, this assumption could be improved by introducing more flexibility. Besides, most existing content-based filtering appr","authors_text":"Lanbo Zhang, Yi Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2014-12-28T06:07:48Z","title":"Hierarchical Bayesian Models with Factorization for Content-Based Recommendation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.8118","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:f6b349af3483c58b3735de0520e56a076eb9bca8cf857db2caa951192f15d9ce","target":"record","created_at":"2026-05-18T02:30:24Z","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":"97e7e594ec3de2e9436beebe522697fcf674eb68173441c8b8c6baa41181b053","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2014-12-28T06:07:48Z","title_canon_sha256":"4194187f09c52d7b8a307142f5a2e10ac4fc7581f1e13881913adc3c0f11ba5d"},"schema_version":"1.0","source":{"id":"1412.8118","kind":"arxiv","version":1}},"canonical_sha256":"0285e244f2dcc2d79dabe82df4207a6e641310f81e1d3b029e4197357ef31552","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0285e244f2dcc2d79dabe82df4207a6e641310f81e1d3b029e4197357ef31552","first_computed_at":"2026-05-18T02:30:24.062252Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:30:24.062252Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iNMQAcCc3wgRoZTcc9HtntzFWSU3dRGWFpwVOdXriNuB6rLK014RE3V+X4ICVicu2dcC3/3hqJRC1pILvXVnDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:30:24.062711Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.8118","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f6b349af3483c58b3735de0520e56a076eb9bca8cf857db2caa951192f15d9ce","sha256:cfa6bf9046515e164b22053deeb62adc1d3f70f396b80511ba93a080f620e8d1"],"state_sha256":"32956f61b9aee5a580242759f0bbdfd890e7c371181c1ead3eaec67f30ac3f56"}