{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:YWOPPLGADIAWJUTXZUQZQU3D4K","short_pith_number":"pith:YWOPPLGA","canonical_record":{"source":{"id":"1506.02478","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cond-mat.soft","submitted_at":"2014-12-18T18:34:34Z","cross_cats_sorted":[],"title_canon_sha256":"4c2b5fd6d50ce5634518f71ee7a8ab8e2e3e54374f1ab0ad61402216edde3b2d","abstract_canon_sha256":"c63cca5308cbb6d75ea3818b2f854a4b21d4da4c24b761f7b7a9100303881a8f"},"schema_version":"1.0"},"canonical_sha256":"c59cf7acc01a0164d277cd21985363e2990e60d13d1af9650fa5c562212a7b06","source":{"kind":"arxiv","id":"1506.02478","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.02478","created_at":"2026-05-18T01:55:51Z"},{"alias_kind":"arxiv_version","alias_value":"1506.02478v1","created_at":"2026-05-18T01:55:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.02478","created_at":"2026-05-18T01:55:51Z"},{"alias_kind":"pith_short_12","alias_value":"YWOPPLGADIAW","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"YWOPPLGADIAWJUTX","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"YWOPPLGA","created_at":"2026-05-18T12:28:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:YWOPPLGADIAWJUTXZUQZQU3D4K","target":"record","payload":{"canonical_record":{"source":{"id":"1506.02478","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cond-mat.soft","submitted_at":"2014-12-18T18:34:34Z","cross_cats_sorted":[],"title_canon_sha256":"4c2b5fd6d50ce5634518f71ee7a8ab8e2e3e54374f1ab0ad61402216edde3b2d","abstract_canon_sha256":"c63cca5308cbb6d75ea3818b2f854a4b21d4da4c24b761f7b7a9100303881a8f"},"schema_version":"1.0"},"canonical_sha256":"c59cf7acc01a0164d277cd21985363e2990e60d13d1af9650fa5c562212a7b06","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:55:51.003857Z","signature_b64":"pZWGqoofbOocHZWy2GsK6ON4hgTvMpLbCQawA9oJDWKeHsTr0uRJN+bz2c79TVGWl9H1562uXQaLml5XFItCBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c59cf7acc01a0164d277cd21985363e2990e60d13d1af9650fa5c562212a7b06","last_reissued_at":"2026-05-18T01:55:51.003228Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:55:51.003228Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.02478","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":"2026-05-18T01:55:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xnyFUjkfMb3E1Uv/pFtM4WtSPhvNGQvNEYutSqBthjhClghc1lLPkGviseuJdFG8iuDGQCIKficJSLQPrLujCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T11:02:09.812601Z"},"content_sha256":"028a7f6a45a03056eaf932d90a6757002493d39ca9128890c66f80533e67460c","schema_version":"1.0","event_id":"sha256:028a7f6a45a03056eaf932d90a6757002493d39ca9128890c66f80533e67460c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:YWOPPLGADIAWJUTXZUQZQU3D4K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Jamming transition in a two-dimensional open granular pile with rolling resistance","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Allbens P.F. Atman, Caio F. M. Magalh\\~aes, Ga\\\"el Combe, Jos\\'e G. Moreira","submitted_at":"2014-12-18T18:34:34Z","abstract_excerpt":"We present a molecular dynamics study of the jamming/unjamming transition in two-dimensional granular piles with open boundaries. The grains are modeled by viscoelastic forces, Coulomb friction and resistance to rolling. Two models for the rolling resistance interaction were assessed: one considers a constant rolling friction coefficient, and the other one a strain dependent coefficient. The piles are grown on a finite size substrate and subsequently discharged through an orifice opened at the center of the substrate. Varying the orifice width and taking the final height of the pile after the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.02478","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":"2026-05-18T01:55:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6T8AyYVmwKVQs8IQoBOipc0Xt6ScXhm4h6F8tSxfvAT44jpjbdMSkgSJR1De0trjGE1+/QncngLHiF81dLEtAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T11:02:09.812945Z"},"content_sha256":"6688a9aa999883e59578e796b7d0e3d3dbcd019fd41af9a9b8019fd78212f752","schema_version":"1.0","event_id":"sha256:6688a9aa999883e59578e796b7d0e3d3dbcd019fd41af9a9b8019fd78212f752"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YWOPPLGADIAWJUTXZUQZQU3D4K/bundle.json","state_url":"https://pith.science/pith/YWOPPLGADIAWJUTXZUQZQU3D4K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YWOPPLGADIAWJUTXZUQZQU3D4K/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":"2026-06-26T11:02:09Z","links":{"resolver":"https://pith.science/pith/YWOPPLGADIAWJUTXZUQZQU3D4K","bundle":"https://pith.science/pith/YWOPPLGADIAWJUTXZUQZQU3D4K/bundle.json","state":"https://pith.science/pith/YWOPPLGADIAWJUTXZUQZQU3D4K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YWOPPLGADIAWJUTXZUQZQU3D4K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:YWOPPLGADIAWJUTXZUQZQU3D4K","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":"c63cca5308cbb6d75ea3818b2f854a4b21d4da4c24b761f7b7a9100303881a8f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cond-mat.soft","submitted_at":"2014-12-18T18:34:34Z","title_canon_sha256":"4c2b5fd6d50ce5634518f71ee7a8ab8e2e3e54374f1ab0ad61402216edde3b2d"},"schema_version":"1.0","source":{"id":"1506.02478","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.02478","created_at":"2026-05-18T01:55:51Z"},{"alias_kind":"arxiv_version","alias_value":"1506.02478v1","created_at":"2026-05-18T01:55:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.02478","created_at":"2026-05-18T01:55:51Z"},{"alias_kind":"pith_short_12","alias_value":"YWOPPLGADIAW","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"YWOPPLGADIAWJUTX","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"YWOPPLGA","created_at":"2026-05-18T12:28:59Z"}],"graph_snapshots":[{"event_id":"sha256:6688a9aa999883e59578e796b7d0e3d3dbcd019fd41af9a9b8019fd78212f752","target":"graph","created_at":"2026-05-18T01:55:51Z","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":"We present a molecular dynamics study of the jamming/unjamming transition in two-dimensional granular piles with open boundaries. The grains are modeled by viscoelastic forces, Coulomb friction and resistance to rolling. Two models for the rolling resistance interaction were assessed: one considers a constant rolling friction coefficient, and the other one a strain dependent coefficient. The piles are grown on a finite size substrate and subsequently discharged through an orifice opened at the center of the substrate. Varying the orifice width and taking the final height of the pile after the ","authors_text":"Allbens P.F. Atman, Caio F. M. Magalh\\~aes, Ga\\\"el Combe, Jos\\'e G. Moreira","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cond-mat.soft","submitted_at":"2014-12-18T18:34:34Z","title":"Jamming transition in a two-dimensional open granular pile with rolling resistance"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.02478","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":"sha256:028a7f6a45a03056eaf932d90a6757002493d39ca9128890c66f80533e67460c","target":"record","created_at":"2026-05-18T01:55:51Z","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":"c63cca5308cbb6d75ea3818b2f854a4b21d4da4c24b761f7b7a9100303881a8f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cond-mat.soft","submitted_at":"2014-12-18T18:34:34Z","title_canon_sha256":"4c2b5fd6d50ce5634518f71ee7a8ab8e2e3e54374f1ab0ad61402216edde3b2d"},"schema_version":"1.0","source":{"id":"1506.02478","kind":"arxiv","version":1}},"canonical_sha256":"c59cf7acc01a0164d277cd21985363e2990e60d13d1af9650fa5c562212a7b06","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c59cf7acc01a0164d277cd21985363e2990e60d13d1af9650fa5c562212a7b06","first_computed_at":"2026-05-18T01:55:51.003228Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:51.003228Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pZWGqoofbOocHZWy2GsK6ON4hgTvMpLbCQawA9oJDWKeHsTr0uRJN+bz2c79TVGWl9H1562uXQaLml5XFItCBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:51.003857Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.02478","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:028a7f6a45a03056eaf932d90a6757002493d39ca9128890c66f80533e67460c","sha256:6688a9aa999883e59578e796b7d0e3d3dbcd019fd41af9a9b8019fd78212f752"],"state_sha256":"3dfde4957e5375f88885b8b4b57317f009ab3797386635e0c2b85901141f55ed"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SE6hGTVWRKA58NEP3sg+GgbANosJz8UjDc9mQKMvkfhww3KP4qZ1PZsyAqYxdsIOKn5BEGGWGhIVB5zcQT8SDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T11:02:09.814880Z","bundle_sha256":"13f06ab66559e1ff40c471b83e4b8c6980359fe83c4505feb8a13fc67a8025de"}}