{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:EL4SWWV6XZPFVNFTO4P4PO3ZEL","short_pith_number":"pith:EL4SWWV6","canonical_record":{"source":{"id":"1305.1148","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2013-05-06T11:17:13Z","cross_cats_sorted":["q-bio.QM"],"title_canon_sha256":"b47190d5e824eebc80a827ad4bfb37071883feeeeeb58c6b8db157a1dfe4f8cf","abstract_canon_sha256":"76f53a07a57061da6318ce46e5f84c9f96ab74ca0ab158bea6aa1f34def89395"},"schema_version":"1.0"},"canonical_sha256":"22f92b5abebe5e5ab4b3771fc7bb7922e2ac99857448a369840e507a8617d49f","source":{"kind":"arxiv","id":"1305.1148","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.1148","created_at":"2026-05-18T03:12:34Z"},{"alias_kind":"arxiv_version","alias_value":"1305.1148v2","created_at":"2026-05-18T03:12:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.1148","created_at":"2026-05-18T03:12:34Z"},{"alias_kind":"pith_short_12","alias_value":"EL4SWWV6XZPF","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EL4SWWV6XZPFVNFT","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EL4SWWV6","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:EL4SWWV6XZPFVNFTO4P4PO3ZEL","target":"record","payload":{"canonical_record":{"source":{"id":"1305.1148","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2013-05-06T11:17:13Z","cross_cats_sorted":["q-bio.QM"],"title_canon_sha256":"b47190d5e824eebc80a827ad4bfb37071883feeeeeb58c6b8db157a1dfe4f8cf","abstract_canon_sha256":"76f53a07a57061da6318ce46e5f84c9f96ab74ca0ab158bea6aa1f34def89395"},"schema_version":"1.0"},"canonical_sha256":"22f92b5abebe5e5ab4b3771fc7bb7922e2ac99857448a369840e507a8617d49f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:12:34.847342Z","signature_b64":"+unQjGDHodpHlIS4Nf6FTTvcLVGwU6YeWsrkSxeCv6LT130lyDK9+vxlxYLLdXteapPegWg9VUYe/8Fpz5POAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"22f92b5abebe5e5ab4b3771fc7bb7922e2ac99857448a369840e507a8617d49f","last_reissued_at":"2026-05-18T03:12:34.846501Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:12:34.846501Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1305.1148","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:12:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"orwZF9X3FMQEgJEP+8mqQh6VMWej1P3BP+ZCEoOiJXIgbk8bW1j/O/6ATBuq6iPUdgjLAUDSK1bQYSgUojHICQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T13:16:40.351622Z"},"content_sha256":"278dc5a3c56213b2cd623bd30e1fe8cbc60020a101ebcc150f6c93dfbe8eb20f","schema_version":"1.0","event_id":"sha256:278dc5a3c56213b2cd623bd30e1fe8cbc60020a101ebcc150f6c93dfbe8eb20f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:EL4SWWV6XZPFVNFTO4P4PO3ZEL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measuring Leaf Chlorophyll Concentration from Its Color: A Way in Monitoring Environment Change to Plantations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["q-bio.QM"],"primary_cat":"physics.bio-ph","authors_text":"Muhammad Abdul Hakim Shibghatallah, Siti Nurul Khotimah, Sony Suhandono, Sparisoma Viridi, Teja Kesuma","submitted_at":"2013-05-06T11:17:13Z","abstract_excerpt":"Leaf colors of a plant can be used to identify stress level due to its adaptation to environmental change. For most leaves green-related colors are sourced from chlorophyll a and b. Chlorophyll concentration is normally measured using a spectrophotometer in laboratory. In some remote observation places, it is impossible to collect the leaves, preserve them, and bring them to laboratory to measure their chlorophyll content. Based on this need, measurement of chlorophyll content is observed through its color. Using CIE chromaticity diagram leaf color information in RGB is transformed into wavele"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.1148","kind":"arxiv","version":2},"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":"2026-05-18T03:12:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p5FP3GiMSF/D39KI7Xe9YD2j4RiL8vqRIVdeiiHZPbx/eABB3ZSzHLOgYuYrfQS3Y9akBR8D7T5M6e/8hjg/CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T13:16:40.351963Z"},"content_sha256":"1132769eb24847489993464bf1060c8a4780c8fa0bea9c75e0df2d2269b5c8d4","schema_version":"1.0","event_id":"sha256:1132769eb24847489993464bf1060c8a4780c8fa0bea9c75e0df2d2269b5c8d4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EL4SWWV6XZPFVNFTO4P4PO3ZEL/bundle.json","state_url":"https://pith.science/pith/EL4SWWV6XZPFVNFTO4P4PO3ZEL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EL4SWWV6XZPFVNFTO4P4PO3ZEL/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":"2026-06-27T13:16:40Z","links":{"resolver":"https://pith.science/pith/EL4SWWV6XZPFVNFTO4P4PO3ZEL","bundle":"https://pith.science/pith/EL4SWWV6XZPFVNFTO4P4PO3ZEL/bundle.json","state":"https://pith.science/pith/EL4SWWV6XZPFVNFTO4P4PO3ZEL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EL4SWWV6XZPFVNFTO4P4PO3ZEL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:EL4SWWV6XZPFVNFTO4P4PO3ZEL","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":"76f53a07a57061da6318ce46e5f84c9f96ab74ca0ab158bea6aa1f34def89395","cross_cats_sorted":["q-bio.QM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2013-05-06T11:17:13Z","title_canon_sha256":"b47190d5e824eebc80a827ad4bfb37071883feeeeeb58c6b8db157a1dfe4f8cf"},"schema_version":"1.0","source":{"id":"1305.1148","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.1148","created_at":"2026-05-18T03:12:34Z"},{"alias_kind":"arxiv_version","alias_value":"1305.1148v2","created_at":"2026-05-18T03:12:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.1148","created_at":"2026-05-18T03:12:34Z"},{"alias_kind":"pith_short_12","alias_value":"EL4SWWV6XZPF","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EL4SWWV6XZPFVNFT","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EL4SWWV6","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:1132769eb24847489993464bf1060c8a4780c8fa0bea9c75e0df2d2269b5c8d4","target":"graph","created_at":"2026-05-18T03:12:34Z","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":"Leaf colors of a plant can be used to identify stress level due to its adaptation to environmental change. For most leaves green-related colors are sourced from chlorophyll a and b. Chlorophyll concentration is normally measured using a spectrophotometer in laboratory. In some remote observation places, it is impossible to collect the leaves, preserve them, and bring them to laboratory to measure their chlorophyll content. Based on this need, measurement of chlorophyll content is observed through its color. Using CIE chromaticity diagram leaf color information in RGB is transformed into wavele","authors_text":"Muhammad Abdul Hakim Shibghatallah, Siti Nurul Khotimah, Sony Suhandono, Sparisoma Viridi, Teja Kesuma","cross_cats":["q-bio.QM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2013-05-06T11:17:13Z","title":"Measuring Leaf Chlorophyll Concentration from Its Color: A Way in Monitoring Environment Change to Plantations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.1148","kind":"arxiv","version":2},"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":"sha256:278dc5a3c56213b2cd623bd30e1fe8cbc60020a101ebcc150f6c93dfbe8eb20f","target":"record","created_at":"2026-05-18T03:12:34Z","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":"76f53a07a57061da6318ce46e5f84c9f96ab74ca0ab158bea6aa1f34def89395","cross_cats_sorted":["q-bio.QM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2013-05-06T11:17:13Z","title_canon_sha256":"b47190d5e824eebc80a827ad4bfb37071883feeeeeb58c6b8db157a1dfe4f8cf"},"schema_version":"1.0","source":{"id":"1305.1148","kind":"arxiv","version":2}},"canonical_sha256":"22f92b5abebe5e5ab4b3771fc7bb7922e2ac99857448a369840e507a8617d49f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"22f92b5abebe5e5ab4b3771fc7bb7922e2ac99857448a369840e507a8617d49f","first_computed_at":"2026-05-18T03:12:34.846501Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:12:34.846501Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+unQjGDHodpHlIS4Nf6FTTvcLVGwU6YeWsrkSxeCv6LT130lyDK9+vxlxYLLdXteapPegWg9VUYe/8Fpz5POAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:12:34.847342Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.1148","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:278dc5a3c56213b2cd623bd30e1fe8cbc60020a101ebcc150f6c93dfbe8eb20f","sha256:1132769eb24847489993464bf1060c8a4780c8fa0bea9c75e0df2d2269b5c8d4"],"state_sha256":"bf962fda37a549b931aab76048df23f2f80c1a8dd6d501f5949d5dd5d715ec8f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ANsZPBgn9tyTOZ4Dxb0N2Ga3cmK8hsWZafegIKFpGf6h95FwnR/ClxT1m0scfcCfuFoL/McJriVawfjzmez1DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T13:16:40.353846Z","bundle_sha256":"2c684de0550b1345889b92ace85342b4a28f566941a8f75af85d9f067b11033b"}}