{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:6R4LNWWDSM4BWAWG4TGLWM7B4Z","short_pith_number":"pith:6R4LNWWD","canonical_record":{"source":{"id":"2301.12575","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2023-01-29T22:56:42Z","cross_cats_sorted":[],"title_canon_sha256":"5d1ec695a21766f8f2d6859d2e3dfa17df30a289043544a3de744ea5d2bd8edb","abstract_canon_sha256":"bed62f5751e4ee7eafca9f2542ea733020878c08db0de37517e6f3e0ff9aaa05"},"schema_version":"1.0"},"canonical_sha256":"f478b6dac393381b02c6e4ccbb33e1e675ddfc607db8aa835e0cf75893752004","source":{"kind":"arxiv","id":"2301.12575","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2301.12575","created_at":"2026-07-05T05:36:55Z"},{"alias_kind":"arxiv_version","alias_value":"2301.12575v1","created_at":"2026-07-05T05:36:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2301.12575","created_at":"2026-07-05T05:36:55Z"},{"alias_kind":"pith_short_12","alias_value":"6R4LNWWDSM4B","created_at":"2026-07-05T05:36:55Z"},{"alias_kind":"pith_short_16","alias_value":"6R4LNWWDSM4BWAWG","created_at":"2026-07-05T05:36:55Z"},{"alias_kind":"pith_short_8","alias_value":"6R4LNWWD","created_at":"2026-07-05T05:36:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:6R4LNWWDSM4BWAWG4TGLWM7B4Z","target":"record","payload":{"canonical_record":{"source":{"id":"2301.12575","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2023-01-29T22:56:42Z","cross_cats_sorted":[],"title_canon_sha256":"5d1ec695a21766f8f2d6859d2e3dfa17df30a289043544a3de744ea5d2bd8edb","abstract_canon_sha256":"bed62f5751e4ee7eafca9f2542ea733020878c08db0de37517e6f3e0ff9aaa05"},"schema_version":"1.0"},"canonical_sha256":"f478b6dac393381b02c6e4ccbb33e1e675ddfc607db8aa835e0cf75893752004","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:36:55.383749Z","signature_b64":"0cDfmxzlYHWSTtQsrFeT8Fu2Szd0WwWz3/s7duiFCi3LhqCOTnGBIB3gDmvtC9Iu20OqNO/V6eOfqOLp3zxrCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f478b6dac393381b02c6e4ccbb33e1e675ddfc607db8aa835e0cf75893752004","last_reissued_at":"2026-07-05T05:36:55.383284Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:36:55.383284Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2301.12575","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":"2026-07-05T05:36:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GYsRk+nvI6TuOazz3shydNqCCfdE2Nf9DFV/EABlAbfSdvJ7J4Ent8F0BDdtXzXQHdxxlKMJidA71gX8vXtBCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T19:28:27.293892Z"},"content_sha256":"859a93d7d33d89775d1487aeff16a1fd0859fbb247f6c6788a271cd7efbf89b5","schema_version":"1.0","event_id":"sha256:859a93d7d33d89775d1487aeff16a1fd0859fbb247f6c6788a271cd7efbf89b5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:6R4LNWWDSM4BWAWG4TGLWM7B4Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Rarefied gas flow in functionalized microchannels","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Andreas L\\\"uttge, Benjamin Besser, Irina Graur, Jorg Th\\\"oming, Pierre Perrier, Rodion Groll, Simon Kunze, Stylianos Varoutis","submitted_at":"2023-01-29T22:56:42Z","abstract_excerpt":"The interaction of rarefied gases with functionalized surfaces is of great importance in technical applications such as gas separation membranes and catalysis. To investigate the influence of functionalization and rarefaction on gas flow rate in a defined geometry, pressure-driven gas flow experiments with helium and carbon dioxide through plain and alkyl-functionalized microchannels are performed. The experiments cover Knudsen numbers from 0.01 to 200 and therefore the slip flow regime up to free molecular flow. To minimize the experimental uncertainty which is prevalent in micro flow experim"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2301.12575","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/2301.12575/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:36:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vlWdD+gOhBnHOqw2XdzKwtEqrrzes1qu6Ag2xnSdZo6EqZnIdCKS+eP4GtA2ZwMH5FQgr49FzVWfnzYH2+fgBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T19:28:27.294550Z"},"content_sha256":"dc866eb48fee499cf491368a02b786c3f87f22dda62c8d31508ae729cee6ddee","schema_version":"1.0","event_id":"sha256:dc866eb48fee499cf491368a02b786c3f87f22dda62c8d31508ae729cee6ddee"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6R4LNWWDSM4BWAWG4TGLWM7B4Z/bundle.json","state_url":"https://pith.science/pith/6R4LNWWDSM4BWAWG4TGLWM7B4Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6R4LNWWDSM4BWAWG4TGLWM7B4Z/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":"2026-07-08T19:28:27Z","links":{"resolver":"https://pith.science/pith/6R4LNWWDSM4BWAWG4TGLWM7B4Z","bundle":"https://pith.science/pith/6R4LNWWDSM4BWAWG4TGLWM7B4Z/bundle.json","state":"https://pith.science/pith/6R4LNWWDSM4BWAWG4TGLWM7B4Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6R4LNWWDSM4BWAWG4TGLWM7B4Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:6R4LNWWDSM4BWAWG4TGLWM7B4Z","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":"bed62f5751e4ee7eafca9f2542ea733020878c08db0de37517e6f3e0ff9aaa05","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2023-01-29T22:56:42Z","title_canon_sha256":"5d1ec695a21766f8f2d6859d2e3dfa17df30a289043544a3de744ea5d2bd8edb"},"schema_version":"1.0","source":{"id":"2301.12575","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2301.12575","created_at":"2026-07-05T05:36:55Z"},{"alias_kind":"arxiv_version","alias_value":"2301.12575v1","created_at":"2026-07-05T05:36:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2301.12575","created_at":"2026-07-05T05:36:55Z"},{"alias_kind":"pith_short_12","alias_value":"6R4LNWWDSM4B","created_at":"2026-07-05T05:36:55Z"},{"alias_kind":"pith_short_16","alias_value":"6R4LNWWDSM4BWAWG","created_at":"2026-07-05T05:36:55Z"},{"alias_kind":"pith_short_8","alias_value":"6R4LNWWD","created_at":"2026-07-05T05:36:55Z"}],"graph_snapshots":[{"event_id":"sha256:dc866eb48fee499cf491368a02b786c3f87f22dda62c8d31508ae729cee6ddee","target":"graph","created_at":"2026-07-05T05:36:55Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2301.12575/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The interaction of rarefied gases with functionalized surfaces is of great importance in technical applications such as gas separation membranes and catalysis. To investigate the influence of functionalization and rarefaction on gas flow rate in a defined geometry, pressure-driven gas flow experiments with helium and carbon dioxide through plain and alkyl-functionalized microchannels are performed. The experiments cover Knudsen numbers from 0.01 to 200 and therefore the slip flow regime up to free molecular flow. To minimize the experimental uncertainty which is prevalent in micro flow experim","authors_text":"Andreas L\\\"uttge, Benjamin Besser, Irina Graur, Jorg Th\\\"oming, Pierre Perrier, Rodion Groll, Simon Kunze, Stylianos Varoutis","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2023-01-29T22:56:42Z","title":"Rarefied gas flow in functionalized microchannels"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2301.12575","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":"sha256:859a93d7d33d89775d1487aeff16a1fd0859fbb247f6c6788a271cd7efbf89b5","target":"record","created_at":"2026-07-05T05:36:55Z","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":"bed62f5751e4ee7eafca9f2542ea733020878c08db0de37517e6f3e0ff9aaa05","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2023-01-29T22:56:42Z","title_canon_sha256":"5d1ec695a21766f8f2d6859d2e3dfa17df30a289043544a3de744ea5d2bd8edb"},"schema_version":"1.0","source":{"id":"2301.12575","kind":"arxiv","version":1}},"canonical_sha256":"f478b6dac393381b02c6e4ccbb33e1e675ddfc607db8aa835e0cf75893752004","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f478b6dac393381b02c6e4ccbb33e1e675ddfc607db8aa835e0cf75893752004","first_computed_at":"2026-07-05T05:36:55.383284Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:36:55.383284Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0cDfmxzlYHWSTtQsrFeT8Fu2Szd0WwWz3/s7duiFCi3LhqCOTnGBIB3gDmvtC9Iu20OqNO/V6eOfqOLp3zxrCw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:36:55.383749Z","signed_message":"canonical_sha256_bytes"},"source_id":"2301.12575","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:859a93d7d33d89775d1487aeff16a1fd0859fbb247f6c6788a271cd7efbf89b5","sha256:dc866eb48fee499cf491368a02b786c3f87f22dda62c8d31508ae729cee6ddee"],"state_sha256":"cae9f538855e7639c131b50da589979d43d27b0d6886da010f7bbf4d5acd2995"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c5Z40bUwGCLWa1tvN487BdI51sYkH7ROTfqQk7/jHGOBo6H2SWazyJd2pSKrlio8Rs3QwiAGNnhEhZepnMn8BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-08T19:28:27.297457Z","bundle_sha256":"b62d93143b3f87b67520d0069ec0a53f3b6e855a866298cb46c52368af1f107f"}}