{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:VKLY4US7H5KWRWDH2CDGVXBZUP","short_pith_number":"pith:VKLY4US7","schema_version":"1.0","canonical_sha256":"aa978e525f3f5568d867d0866adc39a3cd0894fa04966cdc4c022b6386398b29","source":{"kind":"arxiv","id":"1111.1065","version":1},"attestation_state":"computed","paper":{"title":"Self-sustained Levitation of Dust Aggregate Ensembles by Temperature Gradient Induced Overpressures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.other","authors_text":"Gerhard Wurm, Thorben Kelling","submitted_at":"2011-11-04T08:20:08Z","abstract_excerpt":"In laboratory experiments we observe dust aggregates from 100 \\mu m to 1 cm in size composed of micrometer sized grains levitating over a hot surface. Depending on the dust sample aggregates start to levitate at a temperature of 400 K. Levitation of dust aggregates is restricted to a pressure range between 1--40 mbar. The levitating is caused by a Knudsen compressor effect. Based on thermal transpiration through the dust aggregates the pressure increases between surface and aggregates. Dust aggregates are typically balanced 100 \\mu m over the surface. On a slightly concave surface individual a"},"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":"1111.1065","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2011-11-04T08:20:08Z","cross_cats_sorted":[],"title_canon_sha256":"2d2ecefbb4979632358e3bfeebb4edb7f097a6b4f2ec455ffda16d655fcdbc47","abstract_canon_sha256":"028eff302617a399ef6413e1b92a8fa5ee9bef2b1f914c8052c8acb64b941fb3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:09:35.843194Z","signature_b64":"Gpda35Rlt++mJL7WZe1bg0iGrnMy19PWJZTDff/61umLQc7v5SOC1a4b2S73D6SJ1GOwVYJbtPVUMf6cxm50BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aa978e525f3f5568d867d0866adc39a3cd0894fa04966cdc4c022b6386398b29","last_reissued_at":"2026-05-18T04:09:35.842748Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:09:35.842748Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Self-sustained Levitation of Dust Aggregate Ensembles by Temperature Gradient Induced Overpressures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.other","authors_text":"Gerhard Wurm, Thorben Kelling","submitted_at":"2011-11-04T08:20:08Z","abstract_excerpt":"In laboratory experiments we observe dust aggregates from 100 \\mu m to 1 cm in size composed of micrometer sized grains levitating over a hot surface. Depending on the dust sample aggregates start to levitate at a temperature of 400 K. Levitation of dust aggregates is restricted to a pressure range between 1--40 mbar. The levitating is caused by a Knudsen compressor effect. Based on thermal transpiration through the dust aggregates the pressure increases between surface and aggregates. Dust aggregates are typically balanced 100 \\mu m over the surface. On a slightly concave surface individual a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.1065","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":"1111.1065","created_at":"2026-05-18T04:09:35.842809+00:00"},{"alias_kind":"arxiv_version","alias_value":"1111.1065v1","created_at":"2026-05-18T04:09:35.842809+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.1065","created_at":"2026-05-18T04:09:35.842809+00:00"},{"alias_kind":"pith_short_12","alias_value":"VKLY4US7H5KW","created_at":"2026-05-18T12:26:44.992195+00:00"},{"alias_kind":"pith_short_16","alias_value":"VKLY4US7H5KWRWDH","created_at":"2026-05-18T12:26:44.992195+00:00"},{"alias_kind":"pith_short_8","alias_value":"VKLY4US7","created_at":"2026-05-18T12:26:44.992195+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/VKLY4US7H5KWRWDH2CDGVXBZUP","json":"https://pith.science/pith/VKLY4US7H5KWRWDH2CDGVXBZUP.json","graph_json":"https://pith.science/api/pith-number/VKLY4US7H5KWRWDH2CDGVXBZUP/graph.json","events_json":"https://pith.science/api/pith-number/VKLY4US7H5KWRWDH2CDGVXBZUP/events.json","paper":"https://pith.science/paper/VKLY4US7"},"agent_actions":{"view_html":"https://pith.science/pith/VKLY4US7H5KWRWDH2CDGVXBZUP","download_json":"https://pith.science/pith/VKLY4US7H5KWRWDH2CDGVXBZUP.json","view_paper":"https://pith.science/paper/VKLY4US7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1111.1065&json=true","fetch_graph":"https://pith.science/api/pith-number/VKLY4US7H5KWRWDH2CDGVXBZUP/graph.json","fetch_events":"https://pith.science/api/pith-number/VKLY4US7H5KWRWDH2CDGVXBZUP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VKLY4US7H5KWRWDH2CDGVXBZUP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VKLY4US7H5KWRWDH2CDGVXBZUP/action/storage_attestation","attest_author":"https://pith.science/pith/VKLY4US7H5KWRWDH2CDGVXBZUP/action/author_attestation","sign_citation":"https://pith.science/pith/VKLY4US7H5KWRWDH2CDGVXBZUP/action/citation_signature","submit_replication":"https://pith.science/pith/VKLY4US7H5KWRWDH2CDGVXBZUP/action/replication_record"}},"created_at":"2026-05-18T04:09:35.842809+00:00","updated_at":"2026-05-18T04:09:35.842809+00:00"}