{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:KNGVFEBV42SUQ4U6SYTYJKRNKA","short_pith_number":"pith:KNGVFEBV","canonical_record":{"source":{"id":"1508.01426","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-08-06T14:58:55Z","cross_cats_sorted":[],"title_canon_sha256":"0077950e16ac0b47e34dd04be377d5abce71abe9ae04874c4d5a63df8e88adac","abstract_canon_sha256":"1ccc84bd789d55d6bf748d7b60b02453bce996eae4db6c1d6037cfec32084f64"},"schema_version":"1.0"},"canonical_sha256":"534d529035e6a548729e962784aa2d50030311a6aacdb218d68d41f204c679fe","source":{"kind":"arxiv","id":"1508.01426","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.01426","created_at":"2026-05-18T01:35:42Z"},{"alias_kind":"arxiv_version","alias_value":"1508.01426v1","created_at":"2026-05-18T01:35:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.01426","created_at":"2026-05-18T01:35:42Z"},{"alias_kind":"pith_short_12","alias_value":"KNGVFEBV42SU","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"KNGVFEBV42SUQ4U6","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"KNGVFEBV","created_at":"2026-05-18T12:29:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:KNGVFEBV42SUQ4U6SYTYJKRNKA","target":"record","payload":{"canonical_record":{"source":{"id":"1508.01426","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-08-06T14:58:55Z","cross_cats_sorted":[],"title_canon_sha256":"0077950e16ac0b47e34dd04be377d5abce71abe9ae04874c4d5a63df8e88adac","abstract_canon_sha256":"1ccc84bd789d55d6bf748d7b60b02453bce996eae4db6c1d6037cfec32084f64"},"schema_version":"1.0"},"canonical_sha256":"534d529035e6a548729e962784aa2d50030311a6aacdb218d68d41f204c679fe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:42.650196Z","signature_b64":"rom/AGdDKqtZWAqdDkWyqQ/YbZt5g0lqWRUTFoGJ428QP4XqUAxHaOPX5CF7kKH5XnHhD31Czx3KqIZxOwUjCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"534d529035e6a548729e962784aa2d50030311a6aacdb218d68d41f204c679fe","last_reissued_at":"2026-05-18T01:35:42.649744Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:42.649744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.01426","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":"2026-05-18T01:35:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D8hraxRJU+rVUZlTXtLLZXgxDSt30TKEscflBRSJb7emYBZn/5FAsPUgQrcCF8/BFULJvePNmWzb5FDVl1axDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T23:42:39.658614Z"},"content_sha256":"bf706337c02b32eac59f95003758ceef84e60c63dc23f8a977eacffc84d12db8","schema_version":"1.0","event_id":"sha256:bf706337c02b32eac59f95003758ceef84e60c63dc23f8a977eacffc84d12db8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:KNGVFEBV42SUQ4U6SYTYJKRNKA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Role of Contact Angle Hysteresis for Fluid Transport in Wet Granular Matter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Ciro Semprebon, Dirk Kadau, Hans J. Herrmann, Martin Brinkmann, Roman Mani, Stephan Herminghaus","submitted_at":"2015-08-06T14:58:55Z","abstract_excerpt":"The stability of sand castles is determined by the structure of wet granulates. Experimental data about the size distribution of fluid pockets are ambiguous about their origin. We discovered that contact angle hysteresis plays a fundamental role in the equilibrium distribution of bridge volumes, and not geometrical disorder as commonly conjectured, which has substantial consequences on the mechanical properties of wet granular beds, including a history dependent rheology and lowered strength. Our findings are obtained using a novel model where the Laplace pressures, bridge volumes and contact "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.01426","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":"2026-05-18T01:35:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UtAo775E/6fKPZaTl8wIfLEG7xAacHgyDFas01wTjWIMvolT2b19ihBuhzB9cTWXYmGIy0wIzsnLMi4nBYNvAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T23:42:39.659267Z"},"content_sha256":"74a14893bcc57462e3952e11fcba8cc9d0c61ae02a2632168b0c128ff01a4e7b","schema_version":"1.0","event_id":"sha256:74a14893bcc57462e3952e11fcba8cc9d0c61ae02a2632168b0c128ff01a4e7b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KNGVFEBV42SUQ4U6SYTYJKRNKA/bundle.json","state_url":"https://pith.science/pith/KNGVFEBV42SUQ4U6SYTYJKRNKA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KNGVFEBV42SUQ4U6SYTYJKRNKA/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":"2026-05-27T23:42:39Z","links":{"resolver":"https://pith.science/pith/KNGVFEBV42SUQ4U6SYTYJKRNKA","bundle":"https://pith.science/pith/KNGVFEBV42SUQ4U6SYTYJKRNKA/bundle.json","state":"https://pith.science/pith/KNGVFEBV42SUQ4U6SYTYJKRNKA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KNGVFEBV42SUQ4U6SYTYJKRNKA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:KNGVFEBV42SUQ4U6SYTYJKRNKA","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":"1ccc84bd789d55d6bf748d7b60b02453bce996eae4db6c1d6037cfec32084f64","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-08-06T14:58:55Z","title_canon_sha256":"0077950e16ac0b47e34dd04be377d5abce71abe9ae04874c4d5a63df8e88adac"},"schema_version":"1.0","source":{"id":"1508.01426","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.01426","created_at":"2026-05-18T01:35:42Z"},{"alias_kind":"arxiv_version","alias_value":"1508.01426v1","created_at":"2026-05-18T01:35:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.01426","created_at":"2026-05-18T01:35:42Z"},{"alias_kind":"pith_short_12","alias_value":"KNGVFEBV42SU","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"KNGVFEBV42SUQ4U6","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"KNGVFEBV","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:74a14893bcc57462e3952e11fcba8cc9d0c61ae02a2632168b0c128ff01a4e7b","target":"graph","created_at":"2026-05-18T01:35:42Z","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 stability of sand castles is determined by the structure of wet granulates. Experimental data about the size distribution of fluid pockets are ambiguous about their origin. We discovered that contact angle hysteresis plays a fundamental role in the equilibrium distribution of bridge volumes, and not geometrical disorder as commonly conjectured, which has substantial consequences on the mechanical properties of wet granular beds, including a history dependent rheology and lowered strength. Our findings are obtained using a novel model where the Laplace pressures, bridge volumes and contact ","authors_text":"Ciro Semprebon, Dirk Kadau, Hans J. Herrmann, Martin Brinkmann, Roman Mani, Stephan Herminghaus","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-08-06T14:58:55Z","title":"The Role of Contact Angle Hysteresis for Fluid Transport in Wet Granular Matter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.01426","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:bf706337c02b32eac59f95003758ceef84e60c63dc23f8a977eacffc84d12db8","target":"record","created_at":"2026-05-18T01:35:42Z","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":"1ccc84bd789d55d6bf748d7b60b02453bce996eae4db6c1d6037cfec32084f64","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-08-06T14:58:55Z","title_canon_sha256":"0077950e16ac0b47e34dd04be377d5abce71abe9ae04874c4d5a63df8e88adac"},"schema_version":"1.0","source":{"id":"1508.01426","kind":"arxiv","version":1}},"canonical_sha256":"534d529035e6a548729e962784aa2d50030311a6aacdb218d68d41f204c679fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"534d529035e6a548729e962784aa2d50030311a6aacdb218d68d41f204c679fe","first_computed_at":"2026-05-18T01:35:42.649744Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:42.649744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rom/AGdDKqtZWAqdDkWyqQ/YbZt5g0lqWRUTFoGJ428QP4XqUAxHaOPX5CF7kKH5XnHhD31Czx3KqIZxOwUjCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:42.650196Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.01426","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf706337c02b32eac59f95003758ceef84e60c63dc23f8a977eacffc84d12db8","sha256:74a14893bcc57462e3952e11fcba8cc9d0c61ae02a2632168b0c128ff01a4e7b"],"state_sha256":"5171a1823c9862a6fe83417db5eae007335fcb01dbf1768ae05b522485d19def"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m7fMfShyiUySt21cKHv+yFYCql6TjMm0wQWw3i3DmLIDtzPfGp4F22ail1CA1Zs2hvdk/Xws7t/N6EGz+nFBCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T23:42:39.662455Z","bundle_sha256":"d0044d3a5d1cfda78e24624db2e0e9af594a9f5e934838f357d1b5eabd6f4916"}}