{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:CN35ZOYJLBD6MPVJSGE5HY4F3X","short_pith_number":"pith:CN35ZOYJ","schema_version":"1.0","canonical_sha256":"1377dcbb095847e63ea99189d3e385ddc29c20be066b13142cd4ba1b56cea1e9","source":{"kind":"arxiv","id":"2608.00050","version":1},"attestation_state":"computed","paper":{"title":"Identifiability-Aware Source Apportionment in City-Scale Advection-Diffusion Systems","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.CE","cs.LG"],"primary_cat":"eess.SP","authors_text":"Ankit Bhardwaj, Lakshminarayanan Subramanian","submitted_at":"2026-07-25T23:10:51Z","abstract_excerpt":"Source apportionment from sparse urban air-quality sensors is an inverse problem limited by sensor placement, wind-driven transport, background variation, and noise. Known or proxy emission inventories make attribution meaningful by restricting the unknown source field to a finite set of candidate groups, but do not guarantee those groups are distinguishable from the observations. We represent time-varying source activity with a low-dimensional nonnegative temporal basis and formulate inventory-based apportionment as a wind-conditioned lagged inverse problem in which each source--basis coeffic"},"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":"2608.00050","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2026-07-25T23:10:51Z","cross_cats_sorted":["cs.CE","cs.LG"],"title_canon_sha256":"1d18e8ff8c5af0078f71dee854c497ce04a4ca06a7fe7dad1f3893f4fe54481c","abstract_canon_sha256":"cf913c1075c117279f436ca2b4d31a43d5ba61fe55d8eabd1730bc3bc4ee2817"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-04T00:31:51.172160Z","signature_b64":"S8o80NLQ7naAVZnOumYCLeKAFiSboYezVBEV+Y+yWqqofEyBTnRgVNKrDdCRDb8YSzNdxxiODca9RfFC6e8SAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1377dcbb095847e63ea99189d3e385ddc29c20be066b13142cd4ba1b56cea1e9","last_reissued_at":"2026-08-04T00:31:51.170437Z","signature_status":"signed_v1","first_computed_at":"2026-08-04T00:31:51.170437Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Identifiability-Aware Source Apportionment in City-Scale Advection-Diffusion Systems","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.CE","cs.LG"],"primary_cat":"eess.SP","authors_text":"Ankit Bhardwaj, Lakshminarayanan Subramanian","submitted_at":"2026-07-25T23:10:51Z","abstract_excerpt":"Source apportionment from sparse urban air-quality sensors is an inverse problem limited by sensor placement, wind-driven transport, background variation, and noise. Known or proxy emission inventories make attribution meaningful by restricting the unknown source field to a finite set of candidate groups, but do not guarantee those groups are distinguishable from the observations. We represent time-varying source activity with a low-dimensional nonnegative temporal basis and formulate inventory-based apportionment as a wind-conditioned lagged inverse problem in which each source--basis coeffic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.00050","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2608.00050/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":"2608.00050","created_at":"2026-08-04T00:31:51.171574+00:00"},{"alias_kind":"arxiv_version","alias_value":"2608.00050v1","created_at":"2026-08-04T00:31:51.171574+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.00050","created_at":"2026-08-04T00:31:51.171574+00:00"},{"alias_kind":"pith_short_12","alias_value":"CN35ZOYJLBD6","created_at":"2026-08-04T00:31:51.171574+00:00"},{"alias_kind":"pith_short_16","alias_value":"CN35ZOYJLBD6MPVJ","created_at":"2026-08-04T00:31:51.171574+00:00"},{"alias_kind":"pith_short_8","alias_value":"CN35ZOYJ","created_at":"2026-08-04T00:31:51.171574+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/CN35ZOYJLBD6MPVJSGE5HY4F3X","json":"https://pith.science/pith/CN35ZOYJLBD6MPVJSGE5HY4F3X.json","graph_json":"https://pith.science/api/pith-number/CN35ZOYJLBD6MPVJSGE5HY4F3X/graph.json","events_json":"https://pith.science/api/pith-number/CN35ZOYJLBD6MPVJSGE5HY4F3X/events.json","paper":"https://pith.science/paper/CN35ZOYJ"},"agent_actions":{"view_html":"https://pith.science/pith/CN35ZOYJLBD6MPVJSGE5HY4F3X","download_json":"https://pith.science/pith/CN35ZOYJLBD6MPVJSGE5HY4F3X.json","view_paper":"https://pith.science/paper/CN35ZOYJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2608.00050&json=true","fetch_graph":"https://pith.science/api/pith-number/CN35ZOYJLBD6MPVJSGE5HY4F3X/graph.json","fetch_events":"https://pith.science/api/pith-number/CN35ZOYJLBD6MPVJSGE5HY4F3X/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CN35ZOYJLBD6MPVJSGE5HY4F3X/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CN35ZOYJLBD6MPVJSGE5HY4F3X/action/storage_attestation","attest_author":"https://pith.science/pith/CN35ZOYJLBD6MPVJSGE5HY4F3X/action/author_attestation","sign_citation":"https://pith.science/pith/CN35ZOYJLBD6MPVJSGE5HY4F3X/action/citation_signature","submit_replication":"https://pith.science/pith/CN35ZOYJLBD6MPVJSGE5HY4F3X/action/replication_record"}},"created_at":"2026-08-04T00:31:51.171574+00:00","updated_at":"2026-08-04T00:31:51.171574+00:00"}