{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:3M4HA3ADNEEQJ763EWVCRCNLCI","short_pith_number":"pith:3M4HA3AD","canonical_record":{"source":{"id":"1604.05215","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-04-18T15:41:50Z","cross_cats_sorted":[],"title_canon_sha256":"019b57987b36578085f863553daef5c5a3f7840bfdcb3766a397317b47ce8684","abstract_canon_sha256":"7d97fcc466263b9e4faf582f22388e8b6a9918ffd6e863a224182273897360a6"},"schema_version":"1.0"},"canonical_sha256":"db38706c03690904ffdb25aa2889ab122155ad978e25db82406f5c1b1e06dcb8","source":{"kind":"arxiv","id":"1604.05215","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.05215","created_at":"2026-05-18T01:16:55Z"},{"alias_kind":"arxiv_version","alias_value":"1604.05215v1","created_at":"2026-05-18T01:16:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.05215","created_at":"2026-05-18T01:16:55Z"},{"alias_kind":"pith_short_12","alias_value":"3M4HA3ADNEEQ","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3M4HA3ADNEEQJ763","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3M4HA3AD","created_at":"2026-05-18T12:29:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:3M4HA3ADNEEQJ763EWVCRCNLCI","target":"record","payload":{"canonical_record":{"source":{"id":"1604.05215","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-04-18T15:41:50Z","cross_cats_sorted":[],"title_canon_sha256":"019b57987b36578085f863553daef5c5a3f7840bfdcb3766a397317b47ce8684","abstract_canon_sha256":"7d97fcc466263b9e4faf582f22388e8b6a9918ffd6e863a224182273897360a6"},"schema_version":"1.0"},"canonical_sha256":"db38706c03690904ffdb25aa2889ab122155ad978e25db82406f5c1b1e06dcb8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:55.301524Z","signature_b64":"GMFBxZ7/idItNGmQQymgaGRs2OCnNIz8S0SGtPTbKysVOcOpfqT93hlkL8PG1/yf/8Zu4IINF/S5kJVW+TcnBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"db38706c03690904ffdb25aa2889ab122155ad978e25db82406f5c1b1e06dcb8","last_reissued_at":"2026-05-18T01:16:55.300944Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:55.300944Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.05215","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":"2026-05-18T01:16:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tb83z/kwVKX1o5hEQupSbrZ2MWuqXxz5s8ZPhgDaz/zbq2teP4oJ/yq5qz88RQE4m2zmaqNU8/OzpZniE/FqBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T03:55:03.213505Z"},"content_sha256":"7467eebff8daf1535717b636d1b5c25a0d66328e0686571433f4889c683edc2b","schema_version":"1.0","event_id":"sha256:7467eebff8daf1535717b636d1b5c25a0d66328e0686571433f4889c683edc2b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:3M4HA3ADNEEQJ763EWVCRCNLCI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evolution of the free volume between rough surfaces in contact","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"M. Paggi, Q.-C. He","submitted_at":"2016-04-18T15:41:50Z","abstract_excerpt":"The free volume comprised between rough surfaces in contact governs the fluid/gas transport properties across networks of cracks and the leakage/percolation phenomena in seals. In this study, a fundamental insight into the evolution of the free volume depending on the mean plane separation, on the real contact area and on the applied pressure is gained in reference to fractal surfaces whose contact response is solved using the boundary element method. Particular attention is paid to the effect of the surface fractal dimension and of the surface resolution on the predicted results. The free vol"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.05215","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":"2026-05-18T01:16:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fo0Qvux/R5Mxg4AjaYNlTGCJ8mnwpHuQziQRfQwTmcDysnyeYRUg0TBJDjEtPGdDXs70BjTqvZHm4mw9LjvICQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T03:55:03.213848Z"},"content_sha256":"0f85548ce59d018cee451b8a6491e6df5c17cf1db80a6b6b9b15c46f1fb241f2","schema_version":"1.0","event_id":"sha256:0f85548ce59d018cee451b8a6491e6df5c17cf1db80a6b6b9b15c46f1fb241f2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3M4HA3ADNEEQJ763EWVCRCNLCI/bundle.json","state_url":"https://pith.science/pith/3M4HA3ADNEEQJ763EWVCRCNLCI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3M4HA3ADNEEQJ763EWVCRCNLCI/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":"2026-07-05T03:55:03Z","links":{"resolver":"https://pith.science/pith/3M4HA3ADNEEQJ763EWVCRCNLCI","bundle":"https://pith.science/pith/3M4HA3ADNEEQJ763EWVCRCNLCI/bundle.json","state":"https://pith.science/pith/3M4HA3ADNEEQJ763EWVCRCNLCI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3M4HA3ADNEEQJ763EWVCRCNLCI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3M4HA3ADNEEQJ763EWVCRCNLCI","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":"7d97fcc466263b9e4faf582f22388e8b6a9918ffd6e863a224182273897360a6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-04-18T15:41:50Z","title_canon_sha256":"019b57987b36578085f863553daef5c5a3f7840bfdcb3766a397317b47ce8684"},"schema_version":"1.0","source":{"id":"1604.05215","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.05215","created_at":"2026-05-18T01:16:55Z"},{"alias_kind":"arxiv_version","alias_value":"1604.05215v1","created_at":"2026-05-18T01:16:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.05215","created_at":"2026-05-18T01:16:55Z"},{"alias_kind":"pith_short_12","alias_value":"3M4HA3ADNEEQ","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3M4HA3ADNEEQJ763","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3M4HA3AD","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:0f85548ce59d018cee451b8a6491e6df5c17cf1db80a6b6b9b15c46f1fb241f2","target":"graph","created_at":"2026-05-18T01:16:55Z","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"},"paper":{"abstract_excerpt":"The free volume comprised between rough surfaces in contact governs the fluid/gas transport properties across networks of cracks and the leakage/percolation phenomena in seals. In this study, a fundamental insight into the evolution of the free volume depending on the mean plane separation, on the real contact area and on the applied pressure is gained in reference to fractal surfaces whose contact response is solved using the boundary element method. Particular attention is paid to the effect of the surface fractal dimension and of the surface resolution on the predicted results. The free vol","authors_text":"M. Paggi, Q.-C. He","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-04-18T15:41:50Z","title":"Evolution of the free volume between rough surfaces in contact"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.05215","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":"sha256:7467eebff8daf1535717b636d1b5c25a0d66328e0686571433f4889c683edc2b","target":"record","created_at":"2026-05-18T01:16:55Z","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":"7d97fcc466263b9e4faf582f22388e8b6a9918ffd6e863a224182273897360a6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-04-18T15:41:50Z","title_canon_sha256":"019b57987b36578085f863553daef5c5a3f7840bfdcb3766a397317b47ce8684"},"schema_version":"1.0","source":{"id":"1604.05215","kind":"arxiv","version":1}},"canonical_sha256":"db38706c03690904ffdb25aa2889ab122155ad978e25db82406f5c1b1e06dcb8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"db38706c03690904ffdb25aa2889ab122155ad978e25db82406f5c1b1e06dcb8","first_computed_at":"2026-05-18T01:16:55.300944Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:55.300944Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GMFBxZ7/idItNGmQQymgaGRs2OCnNIz8S0SGtPTbKysVOcOpfqT93hlkL8PG1/yf/8Zu4IINF/S5kJVW+TcnBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:55.301524Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.05215","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7467eebff8daf1535717b636d1b5c25a0d66328e0686571433f4889c683edc2b","sha256:0f85548ce59d018cee451b8a6491e6df5c17cf1db80a6b6b9b15c46f1fb241f2"],"state_sha256":"792f5222eae737ba2ca4685e3e3f89777282b050d741bcd2000ff911f192157e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GOSWwtRu97toWlWD3q3PNCe8uVM3h4ZtgNln/hY9StFfLhjXGry06QcfbSUEk5/PgJoz7VumkK0AJwGZfexmBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T03:55:03.215848Z","bundle_sha256":"0b888717f16141fea9193be1a96896b82bd9dcbc6bed6c725941d2ab3ecfaa11"}}