{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:6BTVJRBBHGG7UQXQTM5BM4PRWZ","short_pith_number":"pith:6BTVJRBB","canonical_record":{"source":{"id":"1907.07671","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-07-17T01:49:04Z","cross_cats_sorted":["cs.LG","stat.ML"],"title_canon_sha256":"7b3ec1bb38dcff1dc7c4139a616c29df359f5d205954520a468b5a8b9aceeedc","abstract_canon_sha256":"4ab7599dde6746a895c1345f4844c1ee7ecafe8df5587397161054dbe0265bb1"},"schema_version":"1.0"},"canonical_sha256":"f06754c421398dfa42f09b3a1671f1b646119e1af09763d3f2517606382983a7","source":{"kind":"arxiv","id":"1907.07671","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.07671","created_at":"2026-05-17T23:40:16Z"},{"alias_kind":"arxiv_version","alias_value":"1907.07671v1","created_at":"2026-05-17T23:40:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07671","created_at":"2026-05-17T23:40:16Z"},{"alias_kind":"pith_short_12","alias_value":"6BTVJRBBHGG7","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"6BTVJRBBHGG7UQXQ","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"6BTVJRBB","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:6BTVJRBBHGG7UQXQTM5BM4PRWZ","target":"record","payload":{"canonical_record":{"source":{"id":"1907.07671","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-07-17T01:49:04Z","cross_cats_sorted":["cs.LG","stat.ML"],"title_canon_sha256":"7b3ec1bb38dcff1dc7c4139a616c29df359f5d205954520a468b5a8b9aceeedc","abstract_canon_sha256":"4ab7599dde6746a895c1345f4844c1ee7ecafe8df5587397161054dbe0265bb1"},"schema_version":"1.0"},"canonical_sha256":"f06754c421398dfa42f09b3a1671f1b646119e1af09763d3f2517606382983a7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:16.788684Z","signature_b64":"rC3JNJn/4RZY01SGGvpTNyCXaKYeEgpubgs0ipEuPD/N1D3XvmkjH61rwb/L4DPuWBn719WyCWjRel1Cf/xoDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f06754c421398dfa42f09b3a1671f1b646119e1af09763d3f2517606382983a7","last_reissued_at":"2026-05-17T23:40:16.787995Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:16.787995Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.07671","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":"2026-05-17T23:40:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mi3Gf3Cnu0lg46E1VZKee5xwF3BxiFQV0mLBBYr7/t+T+ljL4h2n1tD6HJvzl89vP103ah6L+FFjL9e3EZScDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T01:32:47.076939Z"},"content_sha256":"24a51bfe69d03d8b2f4b4b88e895c4b492b6a884077c4c36e1e7f6a262fa1c20","schema_version":"1.0","event_id":"sha256:24a51bfe69d03d8b2f4b4b88e895c4b492b6a884077c4c36e1e7f6a262fa1c20"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:6BTVJRBBHGG7UQXQTM5BM4PRWZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electroencephalography based Classification of Long-term Stress using Psychological Labeling","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LG","stat.ML"],"primary_cat":"eess.SP","authors_text":"Humaira Khalid, Muhammad Majid, Sanay Muhammad Umar Saeed, Syed Muhammad Anwar, Ulas Bagci","submitted_at":"2019-07-17T01:49:04Z","abstract_excerpt":"Stress research is a rapidly emerging area in thefield of electroencephalography (EEG) based signal processing.The use of EEG as an objective measure for cost effective andpersonalized stress management becomes important in particularsituations such as the non-availability of mental health facilities.In this study, long-term stress is classified using baseline EEGsignal recordings. The labelling for the stress and control groupsis performed using two methods (i) the perceived stress scalescore and (ii) expert evaluation. The frequency domain featuresare extracted from five-channel EEG recordin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07671","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":"2026-05-17T23:40:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uWGk513aeIkcnKK0V1xSFPlJpXIZk5J95OK4ifpue1KO934Fa2TBPPPXImRJZXWePTVKYrvRkCMWCtFmYINjAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T01:32:47.077294Z"},"content_sha256":"4e2f1477f3bffb3c2dfb38b3b3ef49380281cd91e0a8752deda3ec356bfa0315","schema_version":"1.0","event_id":"sha256:4e2f1477f3bffb3c2dfb38b3b3ef49380281cd91e0a8752deda3ec356bfa0315"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6BTVJRBBHGG7UQXQTM5BM4PRWZ/bundle.json","state_url":"https://pith.science/pith/6BTVJRBBHGG7UQXQTM5BM4PRWZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6BTVJRBBHGG7UQXQTM5BM4PRWZ/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":"2026-05-28T01:32:47Z","links":{"resolver":"https://pith.science/pith/6BTVJRBBHGG7UQXQTM5BM4PRWZ","bundle":"https://pith.science/pith/6BTVJRBBHGG7UQXQTM5BM4PRWZ/bundle.json","state":"https://pith.science/pith/6BTVJRBBHGG7UQXQTM5BM4PRWZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6BTVJRBBHGG7UQXQTM5BM4PRWZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:6BTVJRBBHGG7UQXQTM5BM4PRWZ","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":"4ab7599dde6746a895c1345f4844c1ee7ecafe8df5587397161054dbe0265bb1","cross_cats_sorted":["cs.LG","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-07-17T01:49:04Z","title_canon_sha256":"7b3ec1bb38dcff1dc7c4139a616c29df359f5d205954520a468b5a8b9aceeedc"},"schema_version":"1.0","source":{"id":"1907.07671","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.07671","created_at":"2026-05-17T23:40:16Z"},{"alias_kind":"arxiv_version","alias_value":"1907.07671v1","created_at":"2026-05-17T23:40:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07671","created_at":"2026-05-17T23:40:16Z"},{"alias_kind":"pith_short_12","alias_value":"6BTVJRBBHGG7","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"6BTVJRBBHGG7UQXQ","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"6BTVJRBB","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:4e2f1477f3bffb3c2dfb38b3b3ef49380281cd91e0a8752deda3ec356bfa0315","target":"graph","created_at":"2026-05-17T23:40:16Z","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":"Stress research is a rapidly emerging area in thefield of electroencephalography (EEG) based signal processing.The use of EEG as an objective measure for cost effective andpersonalized stress management becomes important in particularsituations such as the non-availability of mental health facilities.In this study, long-term stress is classified using baseline EEGsignal recordings. The labelling for the stress and control groupsis performed using two methods (i) the perceived stress scalescore and (ii) expert evaluation. The frequency domain featuresare extracted from five-channel EEG recordin","authors_text":"Humaira Khalid, Muhammad Majid, Sanay Muhammad Umar Saeed, Syed Muhammad Anwar, Ulas Bagci","cross_cats":["cs.LG","stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-07-17T01:49:04Z","title":"Electroencephalography based Classification of Long-term Stress using Psychological Labeling"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07671","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":"sha256:24a51bfe69d03d8b2f4b4b88e895c4b492b6a884077c4c36e1e7f6a262fa1c20","target":"record","created_at":"2026-05-17T23:40:16Z","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":"4ab7599dde6746a895c1345f4844c1ee7ecafe8df5587397161054dbe0265bb1","cross_cats_sorted":["cs.LG","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-07-17T01:49:04Z","title_canon_sha256":"7b3ec1bb38dcff1dc7c4139a616c29df359f5d205954520a468b5a8b9aceeedc"},"schema_version":"1.0","source":{"id":"1907.07671","kind":"arxiv","version":1}},"canonical_sha256":"f06754c421398dfa42f09b3a1671f1b646119e1af09763d3f2517606382983a7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f06754c421398dfa42f09b3a1671f1b646119e1af09763d3f2517606382983a7","first_computed_at":"2026-05-17T23:40:16.787995Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:16.787995Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rC3JNJn/4RZY01SGGvpTNyCXaKYeEgpubgs0ipEuPD/N1D3XvmkjH61rwb/L4DPuWBn719WyCWjRel1Cf/xoDg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:16.788684Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.07671","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:24a51bfe69d03d8b2f4b4b88e895c4b492b6a884077c4c36e1e7f6a262fa1c20","sha256:4e2f1477f3bffb3c2dfb38b3b3ef49380281cd91e0a8752deda3ec356bfa0315"],"state_sha256":"fbcd090b1f8e52cbe7d0a016fb42f37dca2336260fa5c1dc9c9c182cdaf91310"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gro4piFwlIrc0zqH8retuWtNgehikH3gklb4EM7K6KZc/kJoaPWOXrNLR+ES681Hg/OFfo2rhjMedf32D031AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T01:32:47.079278Z","bundle_sha256":"7a2c94b3189c3bb0493a027b29612e01d63853e2d4a7af474adc59ed5b275e7d"}}