{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:7HHL26TMI3NLUTGBGBQFTM22UT","short_pith_number":"pith:7HHL26TM","canonical_record":{"source":{"id":"0911.1027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-11-05T13:27:21Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"1e15524333a32acc012033894caecc5bea7a0b3971f59f8729ba2b0e28d870b6","abstract_canon_sha256":"c8f3ceb877c627ff1255778d94b79ee0c703e60f84871d8846b032d56196367f"},"schema_version":"1.0"},"canonical_sha256":"f9cebd7a6c46daba4cc1306059b35aa4fa3b538bc1fbd1028d74f6f8ef3ab6dc","source":{"kind":"arxiv","id":"0911.1027","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1027","created_at":"2026-05-18T02:10:59Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1027v1","created_at":"2026-05-18T02:10:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1027","created_at":"2026-05-18T02:10:59Z"},{"alias_kind":"pith_short_12","alias_value":"7HHL26TMI3NL","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"7HHL26TMI3NLUTGB","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"7HHL26TM","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:7HHL26TMI3NLUTGBGBQFTM22UT","target":"record","payload":{"canonical_record":{"source":{"id":"0911.1027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-11-05T13:27:21Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"1e15524333a32acc012033894caecc5bea7a0b3971f59f8729ba2b0e28d870b6","abstract_canon_sha256":"c8f3ceb877c627ff1255778d94b79ee0c703e60f84871d8846b032d56196367f"},"schema_version":"1.0"},"canonical_sha256":"f9cebd7a6c46daba4cc1306059b35aa4fa3b538bc1fbd1028d74f6f8ef3ab6dc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:59.280378Z","signature_b64":"53TWmCX+xc13LoXAx6TVT1g38E76x3dY8+qkm+wrcdNRm3orNPKt1aRXAXtVFytg0n7mG8ag9CRoAeh10tKhCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f9cebd7a6c46daba4cc1306059b35aa4fa3b538bc1fbd1028d74f6f8ef3ab6dc","last_reissued_at":"2026-05-18T02:10:59.279607Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:59.279607Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0911.1027","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":"2026-05-18T02:10:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AeQ51XsDrvNqqdhyYoyjAuAc4dDAyO1Y4Z4ReztfPEjFPVGWyWwIAl5Ej0h3OzcmKlQryjLzAlpoQCj12rixBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T18:17:14.795809Z"},"content_sha256":"0c3036abe5afafea484e5f3eb870b378876e40e918625e2deb5950bba72ad2ec","schema_version":"1.0","event_id":"sha256:0c3036abe5afafea484e5f3eb870b378876e40e918625e2deb5950bba72ad2ec"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:7HHL26TMI3NLUTGBGBQFTM22UT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The distance upon contact: Determination from roughness profile","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"cond-mat.mes-hall","authors_text":"G. Palasantzas, P. J. van Zwol, V. B. Svetovoy","submitted_at":"2009-11-05T13:27:21Z","abstract_excerpt":"The point at which two random rough surfaces make contact takes place at the contact of the highest asperities. The distance upon contact d_0 in the limit of zero load has crucial importance for determination of dispersive forces. Using gold films as an example we demonstrate that for two parallel plates d_0 is a function of the nominal size of the contact area L and give a simple expression for d_0(L) via the surface roughness characteristics. In the case of a sphere of fixed radius R and a plate the scale dependence manifests itself as an additional uncertainty \\delta d(L) in the separation,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1027","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:10:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P3aGLEyKrphLjCfIM5Wg0pqt/CE4xLt3f9Oj+vkwqRTvWPWPEjG9MlZRzAobn95tiR3upjFbAWv2gRBi1AH4DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T18:17:14.796565Z"},"content_sha256":"c4e7c98a750b239a019c0486708f1e4d15dc0747b86e633ecfaf1cb23e87ac73","schema_version":"1.0","event_id":"sha256:c4e7c98a750b239a019c0486708f1e4d15dc0747b86e633ecfaf1cb23e87ac73"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7HHL26TMI3NLUTGBGBQFTM22UT/bundle.json","state_url":"https://pith.science/pith/7HHL26TMI3NLUTGBGBQFTM22UT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7HHL26TMI3NLUTGBGBQFTM22UT/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":"2026-06-09T18:17:14Z","links":{"resolver":"https://pith.science/pith/7HHL26TMI3NLUTGBGBQFTM22UT","bundle":"https://pith.science/pith/7HHL26TMI3NLUTGBGBQFTM22UT/bundle.json","state":"https://pith.science/pith/7HHL26TMI3NLUTGBGBQFTM22UT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7HHL26TMI3NLUTGBGBQFTM22UT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:7HHL26TMI3NLUTGBGBQFTM22UT","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":"c8f3ceb877c627ff1255778d94b79ee0c703e60f84871d8846b032d56196367f","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-11-05T13:27:21Z","title_canon_sha256":"1e15524333a32acc012033894caecc5bea7a0b3971f59f8729ba2b0e28d870b6"},"schema_version":"1.0","source":{"id":"0911.1027","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1027","created_at":"2026-05-18T02:10:59Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1027v1","created_at":"2026-05-18T02:10:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1027","created_at":"2026-05-18T02:10:59Z"},{"alias_kind":"pith_short_12","alias_value":"7HHL26TMI3NL","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"7HHL26TMI3NLUTGB","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"7HHL26TM","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:c4e7c98a750b239a019c0486708f1e4d15dc0747b86e633ecfaf1cb23e87ac73","target":"graph","created_at":"2026-05-18T02:10:59Z","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"},"paper":{"abstract_excerpt":"The point at which two random rough surfaces make contact takes place at the contact of the highest asperities. The distance upon contact d_0 in the limit of zero load has crucial importance for determination of dispersive forces. Using gold films as an example we demonstrate that for two parallel plates d_0 is a function of the nominal size of the contact area L and give a simple expression for d_0(L) via the surface roughness characteristics. In the case of a sphere of fixed radius R and a plate the scale dependence manifests itself as an additional uncertainty \\delta d(L) in the separation,","authors_text":"G. Palasantzas, P. J. van Zwol, V. B. Svetovoy","cross_cats":["cond-mat.other"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-11-05T13:27:21Z","title":"The distance upon contact: Determination from roughness profile"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1027","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":"sha256:0c3036abe5afafea484e5f3eb870b378876e40e918625e2deb5950bba72ad2ec","target":"record","created_at":"2026-05-18T02:10:59Z","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":"c8f3ceb877c627ff1255778d94b79ee0c703e60f84871d8846b032d56196367f","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-11-05T13:27:21Z","title_canon_sha256":"1e15524333a32acc012033894caecc5bea7a0b3971f59f8729ba2b0e28d870b6"},"schema_version":"1.0","source":{"id":"0911.1027","kind":"arxiv","version":1}},"canonical_sha256":"f9cebd7a6c46daba4cc1306059b35aa4fa3b538bc1fbd1028d74f6f8ef3ab6dc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f9cebd7a6c46daba4cc1306059b35aa4fa3b538bc1fbd1028d74f6f8ef3ab6dc","first_computed_at":"2026-05-18T02:10:59.279607Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:59.279607Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"53TWmCX+xc13LoXAx6TVT1g38E76x3dY8+qkm+wrcdNRm3orNPKt1aRXAXtVFytg0n7mG8ag9CRoAeh10tKhCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:59.280378Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.1027","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0c3036abe5afafea484e5f3eb870b378876e40e918625e2deb5950bba72ad2ec","sha256:c4e7c98a750b239a019c0486708f1e4d15dc0747b86e633ecfaf1cb23e87ac73"],"state_sha256":"9deba590c95156271c6a9d56e035744834a61f1342642dbb276874c2a9f8b547"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cwOuvWekffG2KJlDb3pYzPA3PVdiN9wv+6hHdH+f3ajtxciZETKo82iq3Ohz8snQEoHBJIz0OrgHZnGhOgHMAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T18:17:14.800779Z","bundle_sha256":"86f8f9210241e71affc5ebd63e33767cd689a50500c3466546d10f3f42338c33"}}