{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:D7UVFIEIYFOV2DBLMCOQLALAZV","short_pith_number":"pith:D7UVFIEI","schema_version":"1.0","canonical_sha256":"1fe952a088c15d5d0c2b609d058160cd50be3e1e3aea7016a2faffba71c320fa","source":{"kind":"arxiv","id":"1803.07906","version":1},"attestation_state":"computed","paper":{"title":"Daytime passive radiative cooler using porous alumina","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.app-ph","authors_text":"Jiang Yang, Wei Du, Yang Fu, Yishu Su, Yungui Ma","submitted_at":"2018-02-28T12:07:22Z","abstract_excerpt":"We report a daytime passive radiative cooler using chemically fabricated porous anodic aluminum oxide (AAO) membranes. Effective medium theory (EMT) has been applied to analyzing the optical properties of the air-doped porous medium. The composite structure is specifically optimized so that it has a high absorbance (emittance) in the far-infrared atmospheric window and nearly no loss in the solar spectrum. The calculated emittance is well reproduced in the experiment by our AAO sample. The fabricated porous membrane shows a potential cooling power density of 64 W/m2 at ambient (humidity = 75%)"},"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":"1803.07906","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-02-28T12:07:22Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"c3757241172bb9d3fe2718d3331219e97b59956a9ed39146982ca5ddb2dad0d4","abstract_canon_sha256":"c6f4c64c0f2cdba15f0c6acdb7cb8d4967232d30ea0eb8a27e4cdc15d7ae67c5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:20:28.578397Z","signature_b64":"D/MA2mlIhrPsWpOWAQYBT/zF99T8Qu3edy1A2zANSJDxtmQDteIckRM239YGisDPJMrmCMIKG7tAPEm5PYkMBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1fe952a088c15d5d0c2b609d058160cd50be3e1e3aea7016a2faffba71c320fa","last_reissued_at":"2026-05-18T00:20:28.577780Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:20:28.577780Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Daytime passive radiative cooler using porous alumina","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.app-ph","authors_text":"Jiang Yang, Wei Du, Yang Fu, Yishu Su, Yungui Ma","submitted_at":"2018-02-28T12:07:22Z","abstract_excerpt":"We report a daytime passive radiative cooler using chemically fabricated porous anodic aluminum oxide (AAO) membranes. Effective medium theory (EMT) has been applied to analyzing the optical properties of the air-doped porous medium. The composite structure is specifically optimized so that it has a high absorbance (emittance) in the far-infrared atmospheric window and nearly no loss in the solar spectrum. The calculated emittance is well reproduced in the experiment by our AAO sample. The fabricated porous membrane shows a potential cooling power density of 64 W/m2 at ambient (humidity = 75%)"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07906","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1803.07906","created_at":"2026-05-18T00:20:28.577864+00:00"},{"alias_kind":"arxiv_version","alias_value":"1803.07906v1","created_at":"2026-05-18T00:20:28.577864+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07906","created_at":"2026-05-18T00:20:28.577864+00:00"},{"alias_kind":"pith_short_12","alias_value":"D7UVFIEIYFOV","created_at":"2026-05-18T12:32:19.392346+00:00"},{"alias_kind":"pith_short_16","alias_value":"D7UVFIEIYFOV2DBL","created_at":"2026-05-18T12:32:19.392346+00:00"},{"alias_kind":"pith_short_8","alias_value":"D7UVFIEI","created_at":"2026-05-18T12:32:19.392346+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/D7UVFIEIYFOV2DBLMCOQLALAZV","json":"https://pith.science/pith/D7UVFIEIYFOV2DBLMCOQLALAZV.json","graph_json":"https://pith.science/api/pith-number/D7UVFIEIYFOV2DBLMCOQLALAZV/graph.json","events_json":"https://pith.science/api/pith-number/D7UVFIEIYFOV2DBLMCOQLALAZV/events.json","paper":"https://pith.science/paper/D7UVFIEI"},"agent_actions":{"view_html":"https://pith.science/pith/D7UVFIEIYFOV2DBLMCOQLALAZV","download_json":"https://pith.science/pith/D7UVFIEIYFOV2DBLMCOQLALAZV.json","view_paper":"https://pith.science/paper/D7UVFIEI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1803.07906&json=true","fetch_graph":"https://pith.science/api/pith-number/D7UVFIEIYFOV2DBLMCOQLALAZV/graph.json","fetch_events":"https://pith.science/api/pith-number/D7UVFIEIYFOV2DBLMCOQLALAZV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/D7UVFIEIYFOV2DBLMCOQLALAZV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/D7UVFIEIYFOV2DBLMCOQLALAZV/action/storage_attestation","attest_author":"https://pith.science/pith/D7UVFIEIYFOV2DBLMCOQLALAZV/action/author_attestation","sign_citation":"https://pith.science/pith/D7UVFIEIYFOV2DBLMCOQLALAZV/action/citation_signature","submit_replication":"https://pith.science/pith/D7UVFIEIYFOV2DBLMCOQLALAZV/action/replication_record"}},"created_at":"2026-05-18T00:20:28.577864+00:00","updated_at":"2026-05-18T00:20:28.577864+00:00"}