{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:YUHWL3CMNWORUWEEEPSJ5MP3U2","short_pith_number":"pith:YUHWL3CM","schema_version":"1.0","canonical_sha256":"c50f65ec4c6d9d1a588423e49eb1fba6ab7ec20cb434a2b1fabe302d6964c0a4","source":{"kind":"arxiv","id":"2603.18936","version":2},"attestation_state":"computed","paper":{"title":"Resolving Scale-Dependent Diffusivity in the Brain Extracellular Space","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.bio-ph","authors_text":"Benjamin Flavel, Finn L. Sebastian, Ivo Calaresu, Jana Zaumseil, Laurent Cognet, Laurent Groc, Quentin Gresil","submitted_at":"2026-03-19T14:13:33Z","abstract_excerpt":"Transport through the brain extracellular space has traditionally been summarized by effective diffusion coefficients measured over specific observation ranges. Whether local mobility remains predictive as the same molecule explores larger distances remains unresolved. Here, we track individual ultrashort carbon nanotubes in three dimensions within living hippocampal tissue, following their motion from nanometre to micrometre scales. Using freely diffusing nanotubes in water as an experimental reference, we resolve trajectory-specific crossover lengths beyond which instantaneous diffusivity de"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2603.18936","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.bio-ph","submitted_at":"2026-03-19T14:13:33Z","cross_cats_sorted":[],"title_canon_sha256":"57131dbae208cccae040f2d8d5077e34a1227bee7702060a6d5e6c9ff49d12b6","abstract_canon_sha256":"4fca84ed5910c44672eaa5dda0787af52b85b00ba62d7064164c9ecc07ec3e6a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-04T02:40:24.427784Z","signature_b64":"IuYTx4+rFpX/QouGsOBqObBXFzU/zgpzeqrmn+Dj3csZ2zeDigssJVgQyoo4O7C9w3PKk+/Nc8iNTp+U8I3bCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c50f65ec4c6d9d1a588423e49eb1fba6ab7ec20cb434a2b1fabe302d6964c0a4","last_reissued_at":"2026-08-04T02:40:24.425141Z","signature_status":"signed_v1","first_computed_at":"2026-08-04T02:40:24.425141Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Resolving Scale-Dependent Diffusivity in the Brain Extracellular Space","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.bio-ph","authors_text":"Benjamin Flavel, Finn L. Sebastian, Ivo Calaresu, Jana Zaumseil, Laurent Cognet, Laurent Groc, Quentin Gresil","submitted_at":"2026-03-19T14:13:33Z","abstract_excerpt":"Transport through the brain extracellular space has traditionally been summarized by effective diffusion coefficients measured over specific observation ranges. Whether local mobility remains predictive as the same molecule explores larger distances remains unresolved. Here, we track individual ultrashort carbon nanotubes in three dimensions within living hippocampal tissue, following their motion from nanometre to micrometre scales. Using freely diffusing nanotubes in water as an experimental reference, we resolve trajectory-specific crossover lengths beyond which instantaneous diffusivity de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.18936","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2603.18936/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2603.18936","created_at":"2026-08-04T02:40:24.427508+00:00"},{"alias_kind":"arxiv_version","alias_value":"2603.18936v2","created_at":"2026-08-04T02:40:24.427508+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2603.18936","created_at":"2026-08-04T02:40:24.427508+00:00"},{"alias_kind":"pith_short_12","alias_value":"YUHWL3CMNWOR","created_at":"2026-08-04T02:40:24.427508+00:00"},{"alias_kind":"pith_short_16","alias_value":"YUHWL3CMNWORUWEE","created_at":"2026-08-04T02:40:24.427508+00:00"},{"alias_kind":"pith_short_8","alias_value":"YUHWL3CM","created_at":"2026-08-04T02:40:24.427508+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/YUHWL3CMNWORUWEEEPSJ5MP3U2","json":"https://pith.science/pith/YUHWL3CMNWORUWEEEPSJ5MP3U2.json","graph_json":"https://pith.science/api/pith-number/YUHWL3CMNWORUWEEEPSJ5MP3U2/graph.json","events_json":"https://pith.science/api/pith-number/YUHWL3CMNWORUWEEEPSJ5MP3U2/events.json","paper":"https://pith.science/paper/YUHWL3CM"},"agent_actions":{"view_html":"https://pith.science/pith/YUHWL3CMNWORUWEEEPSJ5MP3U2","download_json":"https://pith.science/pith/YUHWL3CMNWORUWEEEPSJ5MP3U2.json","view_paper":"https://pith.science/paper/YUHWL3CM","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2603.18936&json=true","fetch_graph":"https://pith.science/api/pith-number/YUHWL3CMNWORUWEEEPSJ5MP3U2/graph.json","fetch_events":"https://pith.science/api/pith-number/YUHWL3CMNWORUWEEEPSJ5MP3U2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YUHWL3CMNWORUWEEEPSJ5MP3U2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YUHWL3CMNWORUWEEEPSJ5MP3U2/action/storage_attestation","attest_author":"https://pith.science/pith/YUHWL3CMNWORUWEEEPSJ5MP3U2/action/author_attestation","sign_citation":"https://pith.science/pith/YUHWL3CMNWORUWEEEPSJ5MP3U2/action/citation_signature","submit_replication":"https://pith.science/pith/YUHWL3CMNWORUWEEEPSJ5MP3U2/action/replication_record"}},"created_at":"2026-08-04T02:40:24.427508+00:00","updated_at":"2026-08-04T02:40:24.427508+00:00"}