{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:XIRWGIQTAGWG24XBGOMOYAL34T","short_pith_number":"pith:XIRWGIQT","canonical_record":{"source":{"id":"1806.04634","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.QM","submitted_at":"2018-06-12T16:30:25Z","cross_cats_sorted":["cs.LG","q-bio.TO","stat.AP"],"title_canon_sha256":"055b5f5bb43ecc39f04a75b940812881ebe430d7053dacaf736881a037f50bf7","abstract_canon_sha256":"194fdaebf4e1b862113a6ad580ceccb760123aee65baeaf1559006d380e4d830"},"schema_version":"1.0"},"canonical_sha256":"ba2363221301ac6d72e13398ec017be4c9f586ba49d8c311e398b58241690b74","source":{"kind":"arxiv","id":"1806.04634","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.04634","created_at":"2026-05-18T00:13:33Z"},{"alias_kind":"arxiv_version","alias_value":"1806.04634v1","created_at":"2026-05-18T00:13:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.04634","created_at":"2026-05-18T00:13:33Z"},{"alias_kind":"pith_short_12","alias_value":"XIRWGIQTAGWG","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"XIRWGIQTAGWG24XB","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"XIRWGIQT","created_at":"2026-05-18T12:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:XIRWGIQTAGWG24XBGOMOYAL34T","target":"record","payload":{"canonical_record":{"source":{"id":"1806.04634","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.QM","submitted_at":"2018-06-12T16:30:25Z","cross_cats_sorted":["cs.LG","q-bio.TO","stat.AP"],"title_canon_sha256":"055b5f5bb43ecc39f04a75b940812881ebe430d7053dacaf736881a037f50bf7","abstract_canon_sha256":"194fdaebf4e1b862113a6ad580ceccb760123aee65baeaf1559006d380e4d830"},"schema_version":"1.0"},"canonical_sha256":"ba2363221301ac6d72e13398ec017be4c9f586ba49d8c311e398b58241690b74","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:13:33.133178Z","signature_b64":"7wPv5MUgJZP8EXPCZw8VG/ym12PMMGwNzIPkPbJZrtmcvNUuWMnfg+XzrCoeWSoeeJ1NWb/E/IVqA+sONG5nDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ba2363221301ac6d72e13398ec017be4c9f586ba49d8c311e398b58241690b74","last_reissued_at":"2026-05-18T00:13:33.132740Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:13:33.132740Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.04634","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":"2026-05-18T00:13:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FY64OhD0UdQXp29Hx3Ohk0bib6lKjUCk2Qkyu4l9y2rhMPmkKvrF/9xWofZ92gkgFw8qDNoXpwjXfWeMmCMoCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T07:34:19.236426Z"},"content_sha256":"afd1776c526e646fa1508f179c49a229ba42c985c3592cf67bf74b8bab078356","schema_version":"1.0","event_id":"sha256:afd1776c526e646fa1508f179c49a229ba42c985c3592cf67bf74b8bab078356"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:XIRWGIQTAGWG24XBGOMOYAL34T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measures of Tractography Convergence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LG","q-bio.TO","stat.AP"],"primary_cat":"q-bio.QM","authors_text":"Daniel Moyer, Greg Ver Steeg, Paul M. Thompson","submitted_at":"2018-06-12T16:30:25Z","abstract_excerpt":"In the present work, we use information theory to understand the empirical convergence rate of tractography, a widely-used approach to reconstruct anatomical fiber pathways in the living brain. Based on diffusion MRI data, tractography is the starting point for many methods to study brain connectivity. Of the available methods to perform tractography, most reconstruct a finite set of streamlines, or 3D curves, representing probable connections between anatomical regions, yet relatively little is known about how the sampling of this set of streamlines affects downstream results, and how exhaust"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.04634","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":"2026-05-18T00:13:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fFOkDTXuC9cMzdAxctt0tvpcyWA0sw1jig/5BPL4jgGhE+yqa+N8q0/4Hvp3aMKbA+mwbjoQfRbFNZuQdDUwDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T07:34:19.237042Z"},"content_sha256":"15408f6f0e95add913cd7b466e0e6bb326233251853b2560511ffc456739c618","schema_version":"1.0","event_id":"sha256:15408f6f0e95add913cd7b466e0e6bb326233251853b2560511ffc456739c618"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XIRWGIQTAGWG24XBGOMOYAL34T/bundle.json","state_url":"https://pith.science/pith/XIRWGIQTAGWG24XBGOMOYAL34T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XIRWGIQTAGWG24XBGOMOYAL34T/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":"2026-05-22T07:34:19Z","links":{"resolver":"https://pith.science/pith/XIRWGIQTAGWG24XBGOMOYAL34T","bundle":"https://pith.science/pith/XIRWGIQTAGWG24XBGOMOYAL34T/bundle.json","state":"https://pith.science/pith/XIRWGIQTAGWG24XBGOMOYAL34T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XIRWGIQTAGWG24XBGOMOYAL34T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:XIRWGIQTAGWG24XBGOMOYAL34T","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":"194fdaebf4e1b862113a6ad580ceccb760123aee65baeaf1559006d380e4d830","cross_cats_sorted":["cs.LG","q-bio.TO","stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.QM","submitted_at":"2018-06-12T16:30:25Z","title_canon_sha256":"055b5f5bb43ecc39f04a75b940812881ebe430d7053dacaf736881a037f50bf7"},"schema_version":"1.0","source":{"id":"1806.04634","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.04634","created_at":"2026-05-18T00:13:33Z"},{"alias_kind":"arxiv_version","alias_value":"1806.04634v1","created_at":"2026-05-18T00:13:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.04634","created_at":"2026-05-18T00:13:33Z"},{"alias_kind":"pith_short_12","alias_value":"XIRWGIQTAGWG","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"XIRWGIQTAGWG24XB","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"XIRWGIQT","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:15408f6f0e95add913cd7b466e0e6bb326233251853b2560511ffc456739c618","target":"graph","created_at":"2026-05-18T00:13:33Z","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 the present work, we use information theory to understand the empirical convergence rate of tractography, a widely-used approach to reconstruct anatomical fiber pathways in the living brain. Based on diffusion MRI data, tractography is the starting point for many methods to study brain connectivity. Of the available methods to perform tractography, most reconstruct a finite set of streamlines, or 3D curves, representing probable connections between anatomical regions, yet relatively little is known about how the sampling of this set of streamlines affects downstream results, and how exhaust","authors_text":"Daniel Moyer, Greg Ver Steeg, Paul M. Thompson","cross_cats":["cs.LG","q-bio.TO","stat.AP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.QM","submitted_at":"2018-06-12T16:30:25Z","title":"Measures of Tractography Convergence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.04634","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:afd1776c526e646fa1508f179c49a229ba42c985c3592cf67bf74b8bab078356","target":"record","created_at":"2026-05-18T00:13:33Z","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":"194fdaebf4e1b862113a6ad580ceccb760123aee65baeaf1559006d380e4d830","cross_cats_sorted":["cs.LG","q-bio.TO","stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.QM","submitted_at":"2018-06-12T16:30:25Z","title_canon_sha256":"055b5f5bb43ecc39f04a75b940812881ebe430d7053dacaf736881a037f50bf7"},"schema_version":"1.0","source":{"id":"1806.04634","kind":"arxiv","version":1}},"canonical_sha256":"ba2363221301ac6d72e13398ec017be4c9f586ba49d8c311e398b58241690b74","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ba2363221301ac6d72e13398ec017be4c9f586ba49d8c311e398b58241690b74","first_computed_at":"2026-05-18T00:13:33.132740Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:13:33.132740Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7wPv5MUgJZP8EXPCZw8VG/ym12PMMGwNzIPkPbJZrtmcvNUuWMnfg+XzrCoeWSoeeJ1NWb/E/IVqA+sONG5nDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:13:33.133178Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.04634","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:afd1776c526e646fa1508f179c49a229ba42c985c3592cf67bf74b8bab078356","sha256:15408f6f0e95add913cd7b466e0e6bb326233251853b2560511ffc456739c618"],"state_sha256":"13d870e45e70dfb2db2ba400b7a0f385750f0223a740195839a73e587792b6d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uooLCd/Nvykz+eC96/oyU/Sp8NnN8586pDRPN9r8UXBaMsIIq9jXeLXu+T88XWKE9lURtSEZz/BoOjoaeEsnCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T07:34:19.240241Z","bundle_sha256":"c3ec0c5aa4fb40e2e708e809c631d6692be0b25437f5aeab784900f58481c299"}}