{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:VAAAFOTF6TZYP2JOUL5H7AQ434","short_pith_number":"pith:VAAAFOTF","canonical_record":{"source":{"id":"1708.08621","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2017-08-29T07:53:12Z","cross_cats_sorted":[],"title_canon_sha256":"28397d95c1408342272883366ca3cef48e91e2ebc56565f205de590e55532fe6","abstract_canon_sha256":"105cd0759c6c0f9225172a2fda6091cdd4c310c9f522abfbb150f7e7ea6510b0"},"schema_version":"1.0"},"canonical_sha256":"a80002ba65f4f387e92ea2fa7f821cdf31a0a221f8235623d6cbd2571dc18792","source":{"kind":"arxiv","id":"1708.08621","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.08621","created_at":"2026-05-18T00:13:47Z"},{"alias_kind":"arxiv_version","alias_value":"1708.08621v1","created_at":"2026-05-18T00:13:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.08621","created_at":"2026-05-18T00:13:47Z"},{"alias_kind":"pith_short_12","alias_value":"VAAAFOTF6TZY","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VAAAFOTF6TZYP2JO","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VAAAFOTF","created_at":"2026-05-18T12:31:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:VAAAFOTF6TZYP2JOUL5H7AQ434","target":"record","payload":{"canonical_record":{"source":{"id":"1708.08621","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2017-08-29T07:53:12Z","cross_cats_sorted":[],"title_canon_sha256":"28397d95c1408342272883366ca3cef48e91e2ebc56565f205de590e55532fe6","abstract_canon_sha256":"105cd0759c6c0f9225172a2fda6091cdd4c310c9f522abfbb150f7e7ea6510b0"},"schema_version":"1.0"},"canonical_sha256":"a80002ba65f4f387e92ea2fa7f821cdf31a0a221f8235623d6cbd2571dc18792","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:13:47.661074Z","signature_b64":"f5f1oovt2qvCVz/vp81zfJlRAjqLbY/i1UfS1oymsI6PLXf3DzZo9Dpd3M1EJCa6QD4aAp1ZM/eN/a/V4LAJBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a80002ba65f4f387e92ea2fa7f821cdf31a0a221f8235623d6cbd2571dc18792","last_reissued_at":"2026-05-18T00:13:47.660477Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:13:47.660477Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.08621","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":"2026-05-18T00:13:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"la/GJ3oXK7KgS3RIeU0sQXLtCiCPspJ4m8Ye6cbIiUbyGQu3RNLDq7xhJFV5Takw5SfzlHVdWnI8Ypa/ncnBAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T14:15:02.261593Z"},"content_sha256":"efaffc63eef5c19104701c1ca2410b93dcd52308c37fe67515b1135e2a80ad8f","schema_version":"1.0","event_id":"sha256:efaffc63eef5c19104701c1ca2410b93dcd52308c37fe67515b1135e2a80ad8f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:VAAAFOTF6TZYP2JOUL5H7AQ434","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hourglass pore effect and membrane osmotic diode behavior: model and simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Patrice Bacchin","submitted_at":"2017-08-29T07:53:12Z","abstract_excerpt":"A membrane can be represented by an energy landscape that solutes or colloids must cross. A model accounting for the momentum and the mass balances on the membrane energy landscape establishes a new way of writing for the Darcy law. The counter pressure in the Darcy law is no longer written as the result of an osmotic pressure difference but rather as a function of colloid-membrane interactions. Physically, the colloid-membrane interactions are slowing down the colloid velocity thus inducing a relative fluid-colloid motion that in turn leads to the counter pressure. The ability of the model to"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.08621","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":"2026-05-18T00:13:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Av8pdJxY5TUGdZSxnh0ZKThCyNW4H5lOSrShdcJJgtW8vVAo4gyXb8STz55+6a7XBHrWYYO1l4nn/RQHq383DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T14:15:02.262289Z"},"content_sha256":"195adffb63d05b607bbe3832109a989d3d03db9a177a43b2e4047790a5373124","schema_version":"1.0","event_id":"sha256:195adffb63d05b607bbe3832109a989d3d03db9a177a43b2e4047790a5373124"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VAAAFOTF6TZYP2JOUL5H7AQ434/bundle.json","state_url":"https://pith.science/pith/VAAAFOTF6TZYP2JOUL5H7AQ434/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VAAAFOTF6TZYP2JOUL5H7AQ434/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":"2026-06-07T14:15:02Z","links":{"resolver":"https://pith.science/pith/VAAAFOTF6TZYP2JOUL5H7AQ434","bundle":"https://pith.science/pith/VAAAFOTF6TZYP2JOUL5H7AQ434/bundle.json","state":"https://pith.science/pith/VAAAFOTF6TZYP2JOUL5H7AQ434/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VAAAFOTF6TZYP2JOUL5H7AQ434/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:VAAAFOTF6TZYP2JOUL5H7AQ434","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":"105cd0759c6c0f9225172a2fda6091cdd4c310c9f522abfbb150f7e7ea6510b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2017-08-29T07:53:12Z","title_canon_sha256":"28397d95c1408342272883366ca3cef48e91e2ebc56565f205de590e55532fe6"},"schema_version":"1.0","source":{"id":"1708.08621","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.08621","created_at":"2026-05-18T00:13:47Z"},{"alias_kind":"arxiv_version","alias_value":"1708.08621v1","created_at":"2026-05-18T00:13:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.08621","created_at":"2026-05-18T00:13:47Z"},{"alias_kind":"pith_short_12","alias_value":"VAAAFOTF6TZY","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VAAAFOTF6TZYP2JO","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VAAAFOTF","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:195adffb63d05b607bbe3832109a989d3d03db9a177a43b2e4047790a5373124","target":"graph","created_at":"2026-05-18T00:13:47Z","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":"A membrane can be represented by an energy landscape that solutes or colloids must cross. A model accounting for the momentum and the mass balances on the membrane energy landscape establishes a new way of writing for the Darcy law. The counter pressure in the Darcy law is no longer written as the result of an osmotic pressure difference but rather as a function of colloid-membrane interactions. Physically, the colloid-membrane interactions are slowing down the colloid velocity thus inducing a relative fluid-colloid motion that in turn leads to the counter pressure. The ability of the model to","authors_text":"Patrice Bacchin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2017-08-29T07:53:12Z","title":"Hourglass pore effect and membrane osmotic diode behavior: model and simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.08621","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:efaffc63eef5c19104701c1ca2410b93dcd52308c37fe67515b1135e2a80ad8f","target":"record","created_at":"2026-05-18T00:13:47Z","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":"105cd0759c6c0f9225172a2fda6091cdd4c310c9f522abfbb150f7e7ea6510b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2017-08-29T07:53:12Z","title_canon_sha256":"28397d95c1408342272883366ca3cef48e91e2ebc56565f205de590e55532fe6"},"schema_version":"1.0","source":{"id":"1708.08621","kind":"arxiv","version":1}},"canonical_sha256":"a80002ba65f4f387e92ea2fa7f821cdf31a0a221f8235623d6cbd2571dc18792","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a80002ba65f4f387e92ea2fa7f821cdf31a0a221f8235623d6cbd2571dc18792","first_computed_at":"2026-05-18T00:13:47.660477Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:13:47.660477Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f5f1oovt2qvCVz/vp81zfJlRAjqLbY/i1UfS1oymsI6PLXf3DzZo9Dpd3M1EJCa6QD4aAp1ZM/eN/a/V4LAJBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:13:47.661074Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.08621","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:efaffc63eef5c19104701c1ca2410b93dcd52308c37fe67515b1135e2a80ad8f","sha256:195adffb63d05b607bbe3832109a989d3d03db9a177a43b2e4047790a5373124"],"state_sha256":"b32db0036639842298bef66e9e2d346a9e36ebe501c3723261b9290985632ba8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9afsyqQoTrRVKe5pgXWoH12+FERbDZRY7LXR4B+o1HXCYQ5+AoaIyWYzNJw+vY8FoIW8pFw+Sike52eY0KqlDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T14:15:02.265701Z","bundle_sha256":"95685fa70163759cd6d875f1d7c71ab027e2efdff7ac616b33ab4922c7716a6d"}}