{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:4WS4OBJGV5Y66WFKSJ67GBDMPN","short_pith_number":"pith:4WS4OBJG","canonical_record":{"source":{"id":"1707.02546","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2017-07-09T09:19:21Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"0febf2b0484ed72b6e13a916deb5c67cda445ffc93701415340a22bc0f6d3118","abstract_canon_sha256":"92ed6cad1375a8a8162fb132df66e802881555dcceff0042d937c59cc7894e53"},"schema_version":"1.0"},"canonical_sha256":"e5a5c70526af71ef58aa927df3046c7b52a2896adf3dac9508dc1d0b1d1f6be8","source":{"kind":"arxiv","id":"1707.02546","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.02546","created_at":"2026-05-18T00:40:36Z"},{"alias_kind":"arxiv_version","alias_value":"1707.02546v1","created_at":"2026-05-18T00:40:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.02546","created_at":"2026-05-18T00:40:36Z"},{"alias_kind":"pith_short_12","alias_value":"4WS4OBJGV5Y6","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_16","alias_value":"4WS4OBJGV5Y66WFK","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_8","alias_value":"4WS4OBJG","created_at":"2026-05-18T12:31:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:4WS4OBJGV5Y66WFKSJ67GBDMPN","target":"record","payload":{"canonical_record":{"source":{"id":"1707.02546","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2017-07-09T09:19:21Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"0febf2b0484ed72b6e13a916deb5c67cda445ffc93701415340a22bc0f6d3118","abstract_canon_sha256":"92ed6cad1375a8a8162fb132df66e802881555dcceff0042d937c59cc7894e53"},"schema_version":"1.0"},"canonical_sha256":"e5a5c70526af71ef58aa927df3046c7b52a2896adf3dac9508dc1d0b1d1f6be8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:40:36.532820Z","signature_b64":"A5K+9shcJwZbAXEtRABT9SuZctOZlXY9qkCsAnm+n3NUd8l6LK3xElPcxwLBTERyAW3yZpL4FDC/B1GrrMe+BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e5a5c70526af71ef58aa927df3046c7b52a2896adf3dac9508dc1d0b1d1f6be8","last_reissued_at":"2026-05-18T00:40:36.531916Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:40:36.531916Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.02546","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:40:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hc/qxEltY9sSxYwN9C2WEkDsegfYlXT4EOAo+hPrlg/p5oZM2alQYezsOsp045Z8bCxO3xGT1j0xspDepZJMBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T03:24:15.423088Z"},"content_sha256":"1c9cffa128be133e55f32eacfc15c52b392267bbcb5b44b475afdd37eef0267e","schema_version":"1.0","event_id":"sha256:1c9cffa128be133e55f32eacfc15c52b392267bbcb5b44b475afdd37eef0267e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:4WS4OBJGV5Y66WFKSJ67GBDMPN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Efficient Context Management and Personalized User Recommendations in a Smart Social TV environment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.MM"],"primary_cat":"cs.IR","authors_text":"Alexandros Psychas, Andreas Menychtas, Angelos Valsamis, Fotis Aisopos, Theodora Varvarigou","submitted_at":"2017-07-09T09:19:21Z","abstract_excerpt":"With the emergence of Smart TV and related interconnected devices, second screen solutions have rapidly appeared to provide more content for end-users and enrich their TV experience. Given the various data and sources involved - videos, actors, social media and online databases- the aforementioned market poses great challenges concerning user context management and sophisticated recommendations that can be addressed to the end-users. This paper presents an innovative Context Management model and a related first and second screen recommendation service, based on a user-item graph analysis as we"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.02546","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T00:40:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uI8/AuL8eyv12Oo6fcswA9YY7gIkzuoRU3aRxRsepLVR0s1MnPbQAi+qHAIgq8ZvLIksrLD6zKyNmiSaEvBoDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T03:24:15.423461Z"},"content_sha256":"5093acf56aa505c1ab8f6e320bb04b7cc8acca7c7b1ee0c8a537720570a64c64","schema_version":"1.0","event_id":"sha256:5093acf56aa505c1ab8f6e320bb04b7cc8acca7c7b1ee0c8a537720570a64c64"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4WS4OBJGV5Y66WFKSJ67GBDMPN/bundle.json","state_url":"https://pith.science/pith/4WS4OBJGV5Y66WFKSJ67GBDMPN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4WS4OBJGV5Y66WFKSJ67GBDMPN/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":"2026-06-05T03:24:15Z","links":{"resolver":"https://pith.science/pith/4WS4OBJGV5Y66WFKSJ67GBDMPN","bundle":"https://pith.science/pith/4WS4OBJGV5Y66WFKSJ67GBDMPN/bundle.json","state":"https://pith.science/pith/4WS4OBJGV5Y66WFKSJ67GBDMPN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4WS4OBJGV5Y66WFKSJ67GBDMPN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:4WS4OBJGV5Y66WFKSJ67GBDMPN","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":"92ed6cad1375a8a8162fb132df66e802881555dcceff0042d937c59cc7894e53","cross_cats_sorted":["cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2017-07-09T09:19:21Z","title_canon_sha256":"0febf2b0484ed72b6e13a916deb5c67cda445ffc93701415340a22bc0f6d3118"},"schema_version":"1.0","source":{"id":"1707.02546","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.02546","created_at":"2026-05-18T00:40:36Z"},{"alias_kind":"arxiv_version","alias_value":"1707.02546v1","created_at":"2026-05-18T00:40:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.02546","created_at":"2026-05-18T00:40:36Z"},{"alias_kind":"pith_short_12","alias_value":"4WS4OBJGV5Y6","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_16","alias_value":"4WS4OBJGV5Y66WFK","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_8","alias_value":"4WS4OBJG","created_at":"2026-05-18T12:31:00Z"}],"graph_snapshots":[{"event_id":"sha256:5093acf56aa505c1ab8f6e320bb04b7cc8acca7c7b1ee0c8a537720570a64c64","target":"graph","created_at":"2026-05-18T00:40:36Z","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":"With the emergence of Smart TV and related interconnected devices, second screen solutions have rapidly appeared to provide more content for end-users and enrich their TV experience. Given the various data and sources involved - videos, actors, social media and online databases- the aforementioned market poses great challenges concerning user context management and sophisticated recommendations that can be addressed to the end-users. This paper presents an innovative Context Management model and a related first and second screen recommendation service, based on a user-item graph analysis as we","authors_text":"Alexandros Psychas, Andreas Menychtas, Angelos Valsamis, Fotis Aisopos, Theodora Varvarigou","cross_cats":["cs.MM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2017-07-09T09:19:21Z","title":"Efficient Context Management and Personalized User Recommendations in a Smart Social TV environment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.02546","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":"sha256:1c9cffa128be133e55f32eacfc15c52b392267bbcb5b44b475afdd37eef0267e","target":"record","created_at":"2026-05-18T00:40:36Z","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":"92ed6cad1375a8a8162fb132df66e802881555dcceff0042d937c59cc7894e53","cross_cats_sorted":["cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2017-07-09T09:19:21Z","title_canon_sha256":"0febf2b0484ed72b6e13a916deb5c67cda445ffc93701415340a22bc0f6d3118"},"schema_version":"1.0","source":{"id":"1707.02546","kind":"arxiv","version":1}},"canonical_sha256":"e5a5c70526af71ef58aa927df3046c7b52a2896adf3dac9508dc1d0b1d1f6be8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e5a5c70526af71ef58aa927df3046c7b52a2896adf3dac9508dc1d0b1d1f6be8","first_computed_at":"2026-05-18T00:40:36.531916Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:40:36.531916Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A5K+9shcJwZbAXEtRABT9SuZctOZlXY9qkCsAnm+n3NUd8l6LK3xElPcxwLBTERyAW3yZpL4FDC/B1GrrMe+BA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:40:36.532820Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.02546","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c9cffa128be133e55f32eacfc15c52b392267bbcb5b44b475afdd37eef0267e","sha256:5093acf56aa505c1ab8f6e320bb04b7cc8acca7c7b1ee0c8a537720570a64c64"],"state_sha256":"cc5f5a0169a8eaebe8c6dc5472b807085190dcab3af470d39e7b3cfcc81632fe"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fh1SNSackZidrW5QBJo2PVAC14ircZvJfuZhzTP+YCqwIV105BeL9LkKTb0CyKjH7AlmDbG+gHTWRzls6ETtDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T03:24:15.426724Z","bundle_sha256":"1853fed6738aef6fe7ce3e0e9b5d564e717158bfb73f2d8943b1cd3c4b1c7bc9"}}