{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:NO4CUSTGHH5ZIR2OWSPHKLOBCA","short_pith_number":"pith:NO4CUSTG","canonical_record":{"source":{"id":"1902.01800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2019-02-05T17:15:29Z","cross_cats_sorted":[],"title_canon_sha256":"c7758d49867557e49c4d9c11721a2cf12af90e0a0747028a926c8435ac048ae6","abstract_canon_sha256":"8481f1fe1f9bdaa0f812b7f9562d8bed94a76728cf295eabbc54b4bfd24e1904"},"schema_version":"1.0"},"canonical_sha256":"6bb82a4a6639fb94474eb49e752dc11037f9e64e9cc16768533835428337b9f8","source":{"kind":"arxiv","id":"1902.01800","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.01800","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"arxiv_version","alias_value":"1902.01800v1","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.01800","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"pith_short_12","alias_value":"NO4CUSTGHH5Z","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"NO4CUSTGHH5ZIR2O","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"NO4CUSTG","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:NO4CUSTGHH5ZIR2OWSPHKLOBCA","target":"record","payload":{"canonical_record":{"source":{"id":"1902.01800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2019-02-05T17:15:29Z","cross_cats_sorted":[],"title_canon_sha256":"c7758d49867557e49c4d9c11721a2cf12af90e0a0747028a926c8435ac048ae6","abstract_canon_sha256":"8481f1fe1f9bdaa0f812b7f9562d8bed94a76728cf295eabbc54b4bfd24e1904"},"schema_version":"1.0"},"canonical_sha256":"6bb82a4a6639fb94474eb49e752dc11037f9e64e9cc16768533835428337b9f8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:42.302857Z","signature_b64":"sAux3uufqaFlfPcaNnRRIyoiBe5OtvxR47TIg+bgeZq0m2i9quOYlJO6L1XxlK398E7XfE3PmyIPLUbBROemDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6bb82a4a6639fb94474eb49e752dc11037f9e64e9cc16768533835428337b9f8","last_reissued_at":"2026-05-17T23:54:42.302396Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:42.302396Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.01800","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":"2026-05-17T23:54:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bSYE55pnCpEMbHJLV4AjK79/eOvVdtID35MDOVHGE6kKj0pHFXkXoy77fisRcTcvh2rRRbhQCCaXT9PZ7VmNCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T22:00:12.493276Z"},"content_sha256":"6a971611c8a3ac5e94c3340613f01c1402ee00697d46bcf5e77614fc6c70befe","schema_version":"1.0","event_id":"sha256:6a971611c8a3ac5e94c3340613f01c1402ee00697d46bcf5e77614fc6c70befe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:NO4CUSTGHH5ZIR2OWSPHKLOBCA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Empathic Robot for Group Learning: A Field Study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.HC","authors_text":"Ana Paiva, Francisco S. Melo, Ginevra Castellano, Patricia Alves-Oliveira, Pedro Sequeira","submitted_at":"2019-02-05T17:15:29Z","abstract_excerpt":"This work explores a group learning scenario with an autonomous empathic robot. We address two research questions: (1) Can an autonomous robot designed with empathic competencies foster collaborative learning in a group context? (2) Can an empathic robot sustain positive educational outcomes in long-term collaborative learning interactions with groups of students? To answer these questions, we developed an autonomous robot with empathic competencies that is able to interact with a group of students in a learning activity about sustainable development. Two studies were conducted. The first stud"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.01800","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":"2026-05-17T23:54:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZKfE8s7zFIdjC6Tsb1C84TVpyS5BdSeG52i73yoSf8SxSDCSMEE2s/QnbvgaHbEr5htEPhTC+Pw3kxVC5nQHBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T22:00:12.493945Z"},"content_sha256":"2912835e0238a8fadfe399b6ffe8aac672fcc6a66d0b1a4cf3a119fb5ccfc5ce","schema_version":"1.0","event_id":"sha256:2912835e0238a8fadfe399b6ffe8aac672fcc6a66d0b1a4cf3a119fb5ccfc5ce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NO4CUSTGHH5ZIR2OWSPHKLOBCA/bundle.json","state_url":"https://pith.science/pith/NO4CUSTGHH5ZIR2OWSPHKLOBCA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NO4CUSTGHH5ZIR2OWSPHKLOBCA/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":"2026-05-28T22:00:12Z","links":{"resolver":"https://pith.science/pith/NO4CUSTGHH5ZIR2OWSPHKLOBCA","bundle":"https://pith.science/pith/NO4CUSTGHH5ZIR2OWSPHKLOBCA/bundle.json","state":"https://pith.science/pith/NO4CUSTGHH5ZIR2OWSPHKLOBCA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NO4CUSTGHH5ZIR2OWSPHKLOBCA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:NO4CUSTGHH5ZIR2OWSPHKLOBCA","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":"8481f1fe1f9bdaa0f812b7f9562d8bed94a76728cf295eabbc54b4bfd24e1904","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2019-02-05T17:15:29Z","title_canon_sha256":"c7758d49867557e49c4d9c11721a2cf12af90e0a0747028a926c8435ac048ae6"},"schema_version":"1.0","source":{"id":"1902.01800","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.01800","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"arxiv_version","alias_value":"1902.01800v1","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.01800","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"pith_short_12","alias_value":"NO4CUSTGHH5Z","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"NO4CUSTGHH5ZIR2O","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"NO4CUSTG","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:2912835e0238a8fadfe399b6ffe8aac672fcc6a66d0b1a4cf3a119fb5ccfc5ce","target":"graph","created_at":"2026-05-17T23:54:42Z","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":"This work explores a group learning scenario with an autonomous empathic robot. We address two research questions: (1) Can an autonomous robot designed with empathic competencies foster collaborative learning in a group context? (2) Can an empathic robot sustain positive educational outcomes in long-term collaborative learning interactions with groups of students? To answer these questions, we developed an autonomous robot with empathic competencies that is able to interact with a group of students in a learning activity about sustainable development. Two studies were conducted. The first stud","authors_text":"Ana Paiva, Francisco S. Melo, Ginevra Castellano, Patricia Alves-Oliveira, Pedro Sequeira","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2019-02-05T17:15:29Z","title":"Empathic Robot for Group Learning: A Field Study"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.01800","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":"sha256:6a971611c8a3ac5e94c3340613f01c1402ee00697d46bcf5e77614fc6c70befe","target":"record","created_at":"2026-05-17T23:54:42Z","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":"8481f1fe1f9bdaa0f812b7f9562d8bed94a76728cf295eabbc54b4bfd24e1904","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2019-02-05T17:15:29Z","title_canon_sha256":"c7758d49867557e49c4d9c11721a2cf12af90e0a0747028a926c8435ac048ae6"},"schema_version":"1.0","source":{"id":"1902.01800","kind":"arxiv","version":1}},"canonical_sha256":"6bb82a4a6639fb94474eb49e752dc11037f9e64e9cc16768533835428337b9f8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6bb82a4a6639fb94474eb49e752dc11037f9e64e9cc16768533835428337b9f8","first_computed_at":"2026-05-17T23:54:42.302396Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:42.302396Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sAux3uufqaFlfPcaNnRRIyoiBe5OtvxR47TIg+bgeZq0m2i9quOYlJO6L1XxlK398E7XfE3PmyIPLUbBROemDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:42.302857Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.01800","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6a971611c8a3ac5e94c3340613f01c1402ee00697d46bcf5e77614fc6c70befe","sha256:2912835e0238a8fadfe399b6ffe8aac672fcc6a66d0b1a4cf3a119fb5ccfc5ce"],"state_sha256":"85ea25aed12fc3d5ec8a44799d4df1ac0b11641487b86f1de3016e9bba07746a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PzAVt07EGdS8ropgch9fc9eO1g+u9Cd19Tw96g49JRfQH9TMiETO4iwo4nE20YPfr2D+onLuTvSSPGHxRW+YBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T22:00:12.497439Z","bundle_sha256":"2e826e5fc60dcef86f254c11c73e7c879f2a7874e3661770ffc29e57db27e1d7"}}