{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:STMYWWE377XD4HPIAQSNUBF2WS","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":"43acdb1c1791513278cee3f04da3647d7149df6c39983fa5786ac850261f8154","cross_cats_sorted":["cs.CY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2015-01-17T02:23:16Z","title_canon_sha256":"bff14dca9ad9be3a77940114fb94baf8903f0eb6d3bb7c52b5138f0ffd7f7a22"},"schema_version":"1.0","source":{"id":"1501.04143","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.04143","created_at":"2026-05-18T02:29:09Z"},{"alias_kind":"arxiv_version","alias_value":"1501.04143v1","created_at":"2026-05-18T02:29:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.04143","created_at":"2026-05-18T02:29:09Z"},{"alias_kind":"pith_short_12","alias_value":"STMYWWE377XD","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"STMYWWE377XD4HPI","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"STMYWWE3","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:b64a28f115ba662af36d9185046a83a6797c6c063ddc5423b81ed5123386d9e3","target":"graph","created_at":"2026-05-18T02:29:09Z","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":"The paper describes creation and development of the educational online communication platform for teaching and learning foreign languages. The system is based on the time bank principle, allowing users to teach others their native tongue along with taking foreign language lessons. The system is based on the WebRTC technology, allowing users to access synchronized teaching materials along with seeing and hearing each other. The platform is free for the users with implemented gamification mechanics to motivate them. It is based on the freemium model, where the main functions are provided free of","authors_text":"Alex A. Volinsky, Anna Y. Prasikova, Ilya V. Osipov","cross_cats":["cs.CY"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2015-01-17T02:23:16Z","title":"Communication and games in the online foreign language educational system. User behavior study"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.04143","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":"sha256:0395ca5c8e55417db9426566d0ec665e85347500f12ade6b5c87e69e59e8499d","target":"record","created_at":"2026-05-18T02:29:09Z","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":"43acdb1c1791513278cee3f04da3647d7149df6c39983fa5786ac850261f8154","cross_cats_sorted":["cs.CY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2015-01-17T02:23:16Z","title_canon_sha256":"bff14dca9ad9be3a77940114fb94baf8903f0eb6d3bb7c52b5138f0ffd7f7a22"},"schema_version":"1.0","source":{"id":"1501.04143","kind":"arxiv","version":1}},"canonical_sha256":"94d98b589bffee3e1de80424da04bab4a2c189b1733d8e7e99d65e3abd9917fc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"94d98b589bffee3e1de80424da04bab4a2c189b1733d8e7e99d65e3abd9917fc","first_computed_at":"2026-05-18T02:29:09.952134Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:29:09.952134Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nqpy57WelPW5axFY9ypRN8g+PjJsIdnP4zqqw/xj5p/SvtOkA5p1J4H7JrcReUxEaZOoIhnv+SlpUjkcYLfXCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:29:09.952870Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.04143","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0395ca5c8e55417db9426566d0ec665e85347500f12ade6b5c87e69e59e8499d","sha256:b64a28f115ba662af36d9185046a83a6797c6c063ddc5423b81ed5123386d9e3"],"state_sha256":"0de072bf4993e41ed3ecf79a3027fe6c1dbb7e4e828498216d6f9bf892f3102c"}