{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:VBGERM3YYQMGZ3NVDHHPSZ355U","short_pith_number":"pith:VBGERM3Y","canonical_record":{"source":{"id":"1507.07445","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2015-07-27T15:19:00Z","cross_cats_sorted":["physics.geo-ph","stat.CO"],"title_canon_sha256":"b973352224dfb22728f4b60d2ea7e160f8de3403782dbf30e8572190150392c1","abstract_canon_sha256":"c1b74131d611ff47f712f0edf62bfb038d23512d23d3c12f68d1893c6dc6d879"},"schema_version":"1.0"},"canonical_sha256":"a84c48b378c4186cedb519cef9677ded12cadb06041911101efcc10cdead007f","source":{"kind":"arxiv","id":"1507.07445","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.07445","created_at":"2026-05-18T01:36:16Z"},{"alias_kind":"arxiv_version","alias_value":"1507.07445v1","created_at":"2026-05-18T01:36:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.07445","created_at":"2026-05-18T01:36:16Z"},{"alias_kind":"pith_short_12","alias_value":"VBGERM3YYQMG","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"VBGERM3YYQMGZ3NV","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"VBGERM3Y","created_at":"2026-05-18T12:29:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:VBGERM3YYQMGZ3NVDHHPSZ355U","target":"record","payload":{"canonical_record":{"source":{"id":"1507.07445","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2015-07-27T15:19:00Z","cross_cats_sorted":["physics.geo-ph","stat.CO"],"title_canon_sha256":"b973352224dfb22728f4b60d2ea7e160f8de3403782dbf30e8572190150392c1","abstract_canon_sha256":"c1b74131d611ff47f712f0edf62bfb038d23512d23d3c12f68d1893c6dc6d879"},"schema_version":"1.0"},"canonical_sha256":"a84c48b378c4186cedb519cef9677ded12cadb06041911101efcc10cdead007f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:36:16.400381Z","signature_b64":"buofZbvmrHzqspB4Hi0LsXQELSPNXx1h2AQ+BzyYht6rrEb+1gTAmY5fnqBQ2VsaQZZI+RLfCGQcEES8wBOJAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a84c48b378c4186cedb519cef9677ded12cadb06041911101efcc10cdead007f","last_reissued_at":"2026-05-18T01:36:16.399991Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:36:16.399991Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.07445","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":"2026-05-18T01:36:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EamD8iiAz3vqX6CJDWGxoOIjsAuikCpJaU5ej2y1fnOBUzz9iszsqFxgtQQ8c+MPdfK85YPsqYbawysm905pCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:52:10.783756Z"},"content_sha256":"028f71c2da357645b41aac1320143dc6d4d9a0f969d19345d8907bb346c916fb","schema_version":"1.0","event_id":"sha256:028f71c2da357645b41aac1320143dc6d4d9a0f969d19345d8907bb346c916fb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:VBGERM3YYQMGZ3NVDHHPSZ355U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Assessment of petrophysical quantities inspired by joint multifractal approach","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.geo-ph","stat.CO"],"primary_cat":"physics.comp-ph","authors_text":"G. R. Jafari, S. M. S. Movahed, Z. Koohi Lai","submitted_at":"2015-07-27T15:19:00Z","abstract_excerpt":"In this paper joint multifractal random walk approach is carried out to analyze some petrophysical quantities for characterizing the petroleum reservoir. These quantities include Gamma emission (GR), sonic transient time (DT) and Neutron porosity (NPHI) which are collected from four wells of a reservoir. To quantify mutual interaction of petrophysical quantities, joint multifractal random walk is implemented. This approach is based on the mutual multiplicative cascade notion in the multifractal formalism and in this approach $L_0$ represents a benchmark to describe the nature of cross-correlat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.07445","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":"2026-05-18T01:36:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DeTWwVVvqrvFrv4ZsZnsCZH6e1SHw6ALylGHGLKeBU8qC626dEi0c+ZORJsbkoQjXFu9FU96CguAI9mAkqF2AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:52:10.784430Z"},"content_sha256":"25203bdf7d90af9cfc3f8f02ee4b19bd3118f9a0c2d87efe20aa59e8a7c81e86","schema_version":"1.0","event_id":"sha256:25203bdf7d90af9cfc3f8f02ee4b19bd3118f9a0c2d87efe20aa59e8a7c81e86"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VBGERM3YYQMGZ3NVDHHPSZ355U/bundle.json","state_url":"https://pith.science/pith/VBGERM3YYQMGZ3NVDHHPSZ355U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VBGERM3YYQMGZ3NVDHHPSZ355U/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":"2026-05-27T05:52:10Z","links":{"resolver":"https://pith.science/pith/VBGERM3YYQMGZ3NVDHHPSZ355U","bundle":"https://pith.science/pith/VBGERM3YYQMGZ3NVDHHPSZ355U/bundle.json","state":"https://pith.science/pith/VBGERM3YYQMGZ3NVDHHPSZ355U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VBGERM3YYQMGZ3NVDHHPSZ355U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:VBGERM3YYQMGZ3NVDHHPSZ355U","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":"c1b74131d611ff47f712f0edf62bfb038d23512d23d3c12f68d1893c6dc6d879","cross_cats_sorted":["physics.geo-ph","stat.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2015-07-27T15:19:00Z","title_canon_sha256":"b973352224dfb22728f4b60d2ea7e160f8de3403782dbf30e8572190150392c1"},"schema_version":"1.0","source":{"id":"1507.07445","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.07445","created_at":"2026-05-18T01:36:16Z"},{"alias_kind":"arxiv_version","alias_value":"1507.07445v1","created_at":"2026-05-18T01:36:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.07445","created_at":"2026-05-18T01:36:16Z"},{"alias_kind":"pith_short_12","alias_value":"VBGERM3YYQMG","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"VBGERM3YYQMGZ3NV","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"VBGERM3Y","created_at":"2026-05-18T12:29:44Z"}],"graph_snapshots":[{"event_id":"sha256:25203bdf7d90af9cfc3f8f02ee4b19bd3118f9a0c2d87efe20aa59e8a7c81e86","target":"graph","created_at":"2026-05-18T01:36:16Z","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":"In this paper joint multifractal random walk approach is carried out to analyze some petrophysical quantities for characterizing the petroleum reservoir. These quantities include Gamma emission (GR), sonic transient time (DT) and Neutron porosity (NPHI) which are collected from four wells of a reservoir. To quantify mutual interaction of petrophysical quantities, joint multifractal random walk is implemented. This approach is based on the mutual multiplicative cascade notion in the multifractal formalism and in this approach $L_0$ represents a benchmark to describe the nature of cross-correlat","authors_text":"G. R. Jafari, S. M. S. Movahed, Z. Koohi Lai","cross_cats":["physics.geo-ph","stat.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2015-07-27T15:19:00Z","title":"Assessment of petrophysical quantities inspired by joint multifractal approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.07445","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":"sha256:028f71c2da357645b41aac1320143dc6d4d9a0f969d19345d8907bb346c916fb","target":"record","created_at":"2026-05-18T01:36:16Z","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":"c1b74131d611ff47f712f0edf62bfb038d23512d23d3c12f68d1893c6dc6d879","cross_cats_sorted":["physics.geo-ph","stat.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2015-07-27T15:19:00Z","title_canon_sha256":"b973352224dfb22728f4b60d2ea7e160f8de3403782dbf30e8572190150392c1"},"schema_version":"1.0","source":{"id":"1507.07445","kind":"arxiv","version":1}},"canonical_sha256":"a84c48b378c4186cedb519cef9677ded12cadb06041911101efcc10cdead007f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a84c48b378c4186cedb519cef9677ded12cadb06041911101efcc10cdead007f","first_computed_at":"2026-05-18T01:36:16.399991Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:36:16.399991Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"buofZbvmrHzqspB4Hi0LsXQELSPNXx1h2AQ+BzyYht6rrEb+1gTAmY5fnqBQ2VsaQZZI+RLfCGQcEES8wBOJAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:36:16.400381Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.07445","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:028f71c2da357645b41aac1320143dc6d4d9a0f969d19345d8907bb346c916fb","sha256:25203bdf7d90af9cfc3f8f02ee4b19bd3118f9a0c2d87efe20aa59e8a7c81e86"],"state_sha256":"b40ce57d20da9a84354e5b04117dd7cee80498cc9cc42b638a5a350332f62248"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4Wn15km+/nzo+jHbpqQKucJYDyfMvtNkf1j29aZVoAqiTyFoK3dXBD4beH2A97YfO/jb/goFTOPC40xLblssBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T05:52:10.787728Z","bundle_sha256":"07c10a3f6b33b4d52be0666609ebc78842510acf6746e2f99c950dd3613beed0"}}