{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:5BSEC2OJ7ICXO6CCSSCPPX7AXY","short_pith_number":"pith:5BSEC2OJ","canonical_record":{"source":{"id":"1907.07245","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2019-07-09T21:19:02Z","cross_cats_sorted":[],"title_canon_sha256":"86351fa7dbe073b57932de6d4fcc31d1a23d233d8ad7854a873d8ebeab2ed73c","abstract_canon_sha256":"3d16becfe228962c57c5c649b5f963499f724484afc5f8bce56a3829fcd48fe7"},"schema_version":"1.0"},"canonical_sha256":"e8644169c9fa057778429484f7dfe0be342e95825a77a3674cb7be431f119d7e","source":{"kind":"arxiv","id":"1907.07245","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.07245","created_at":"2026-05-17T23:40:27Z"},{"alias_kind":"arxiv_version","alias_value":"1907.07245v1","created_at":"2026-05-17T23:40:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07245","created_at":"2026-05-17T23:40:27Z"},{"alias_kind":"pith_short_12","alias_value":"5BSEC2OJ7ICX","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"5BSEC2OJ7ICXO6CC","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"5BSEC2OJ","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:5BSEC2OJ7ICXO6CCSSCPPX7AXY","target":"record","payload":{"canonical_record":{"source":{"id":"1907.07245","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2019-07-09T21:19:02Z","cross_cats_sorted":[],"title_canon_sha256":"86351fa7dbe073b57932de6d4fcc31d1a23d233d8ad7854a873d8ebeab2ed73c","abstract_canon_sha256":"3d16becfe228962c57c5c649b5f963499f724484afc5f8bce56a3829fcd48fe7"},"schema_version":"1.0"},"canonical_sha256":"e8644169c9fa057778429484f7dfe0be342e95825a77a3674cb7be431f119d7e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:27.312521Z","signature_b64":"dIGgmdwztrbbLUyXAYMH0lJyf6bP8A9VkWTlWdE0DhZH7uI22EQG9GrMu8pjtnCIbrIuXu/QLynXXKyIqi1XAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e8644169c9fa057778429484f7dfe0be342e95825a77a3674cb7be431f119d7e","last_reissued_at":"2026-05-17T23:40:27.311769Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:27.311769Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.07245","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":"2026-05-17T23:40:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nSFra2hMfVWsndVg63oH3B+ktS05sxWNLMYmHbnFODQadk2dO4wiiT9FUE0O4dZtUxXQfpkaJdVpCXeEgP5KAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:23:17.286789Z"},"content_sha256":"ea828bd0e9c8462872911c194bb36f303b2ad0feae0c95a4afe557ed6db43965","schema_version":"1.0","event_id":"sha256:ea828bd0e9c8462872911c194bb36f303b2ad0feae0c95a4afe557ed6db43965"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:5BSEC2OJ7ICXO6CCSSCPPX7AXY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Survey of Automatic Methods for Nutritional Assessment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CY","authors_text":"Dag Johansen, H{\\aa}vard D. Johansen, Lars Brenna","submitted_at":"2019-07-09T21:19:02Z","abstract_excerpt":"Nutritional assessment is key in order to make decisions about the nature and cause of nutrition related health issues that affect an individual. The systematic process of collecting and interpreting relevant nutrition information, however, is still in its technological infancy. Despite technological advances in storage and analysis of nutritional data, methods for collecting data are largely unchanged over the past two decades. It is well documented that these methods have issues that cause under-reporting. Meanwhile, new developments in wearable biometric logging devices have seen increased "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07245","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":"2026-05-17T23:40:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kdxW5F+oc6DIO1qq0zCfcdJPFFlju217eNquBOZi+GqyRMG8OwryWuRSZJgFKTD++K0dDdlQtmY/wr2PyL/KCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:23:17.287480Z"},"content_sha256":"6cbbcf78454b2e9fa31436968f2f7f5b1bcbf4e2645566873e9594d4a2e8dcae","schema_version":"1.0","event_id":"sha256:6cbbcf78454b2e9fa31436968f2f7f5b1bcbf4e2645566873e9594d4a2e8dcae"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5BSEC2OJ7ICXO6CCSSCPPX7AXY/bundle.json","state_url":"https://pith.science/pith/5BSEC2OJ7ICXO6CCSSCPPX7AXY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5BSEC2OJ7ICXO6CCSSCPPX7AXY/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":"2026-05-25T20:23:17Z","links":{"resolver":"https://pith.science/pith/5BSEC2OJ7ICXO6CCSSCPPX7AXY","bundle":"https://pith.science/pith/5BSEC2OJ7ICXO6CCSSCPPX7AXY/bundle.json","state":"https://pith.science/pith/5BSEC2OJ7ICXO6CCSSCPPX7AXY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5BSEC2OJ7ICXO6CCSSCPPX7AXY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:5BSEC2OJ7ICXO6CCSSCPPX7AXY","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":"3d16becfe228962c57c5c649b5f963499f724484afc5f8bce56a3829fcd48fe7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2019-07-09T21:19:02Z","title_canon_sha256":"86351fa7dbe073b57932de6d4fcc31d1a23d233d8ad7854a873d8ebeab2ed73c"},"schema_version":"1.0","source":{"id":"1907.07245","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.07245","created_at":"2026-05-17T23:40:27Z"},{"alias_kind":"arxiv_version","alias_value":"1907.07245v1","created_at":"2026-05-17T23:40:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07245","created_at":"2026-05-17T23:40:27Z"},{"alias_kind":"pith_short_12","alias_value":"5BSEC2OJ7ICX","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"5BSEC2OJ7ICXO6CC","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"5BSEC2OJ","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:6cbbcf78454b2e9fa31436968f2f7f5b1bcbf4e2645566873e9594d4a2e8dcae","target":"graph","created_at":"2026-05-17T23:40:27Z","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":"Nutritional assessment is key in order to make decisions about the nature and cause of nutrition related health issues that affect an individual. The systematic process of collecting and interpreting relevant nutrition information, however, is still in its technological infancy. Despite technological advances in storage and analysis of nutritional data, methods for collecting data are largely unchanged over the past two decades. It is well documented that these methods have issues that cause under-reporting. Meanwhile, new developments in wearable biometric logging devices have seen increased ","authors_text":"Dag Johansen, H{\\aa}vard D. Johansen, Lars Brenna","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2019-07-09T21:19:02Z","title":"A Survey of Automatic Methods for Nutritional Assessment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07245","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:ea828bd0e9c8462872911c194bb36f303b2ad0feae0c95a4afe557ed6db43965","target":"record","created_at":"2026-05-17T23:40:27Z","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":"3d16becfe228962c57c5c649b5f963499f724484afc5f8bce56a3829fcd48fe7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2019-07-09T21:19:02Z","title_canon_sha256":"86351fa7dbe073b57932de6d4fcc31d1a23d233d8ad7854a873d8ebeab2ed73c"},"schema_version":"1.0","source":{"id":"1907.07245","kind":"arxiv","version":1}},"canonical_sha256":"e8644169c9fa057778429484f7dfe0be342e95825a77a3674cb7be431f119d7e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e8644169c9fa057778429484f7dfe0be342e95825a77a3674cb7be431f119d7e","first_computed_at":"2026-05-17T23:40:27.311769Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:27.311769Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dIGgmdwztrbbLUyXAYMH0lJyf6bP8A9VkWTlWdE0DhZH7uI22EQG9GrMu8pjtnCIbrIuXu/QLynXXKyIqi1XAA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:27.312521Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.07245","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea828bd0e9c8462872911c194bb36f303b2ad0feae0c95a4afe557ed6db43965","sha256:6cbbcf78454b2e9fa31436968f2f7f5b1bcbf4e2645566873e9594d4a2e8dcae"],"state_sha256":"580c82110d71cb5865860bff1edc1c2c2babe0cf6955e0827b3b11fab1057cbb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VKKO/58pqonYhtCVrGA/oVmTY3C/zXbvoxrSTdpebRldcW9YKC9CbV1q1GmiyXTpDqC/S+zs+9JvfUrwbaUaDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T20:23:17.291532Z","bundle_sha256":"b5b2a574388fe820f5811d319c3c9efb727f9ea23b8850e8d126c9995892fbe4"}}