{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:QAWN42JBTMYTPUKADSZYFOKWH3","short_pith_number":"pith:QAWN42JB","canonical_record":{"source":{"id":"cond-mat/0101377","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2001-01-24T16:59:44Z","cross_cats_sorted":[],"title_canon_sha256":"113f96d4924a269ec7e807a5e5e8bbdf6d3e03c404574270c9febf338c6d2280","abstract_canon_sha256":"4f3e64d1d130a5f3207dc591eaef978e39e40f4d9b58d1dfe373847136ec8a4e"},"schema_version":"1.0"},"canonical_sha256":"802cde69219b3137d1401cb382b9563ee1f97905c4f0ed15b5859ec40a848d3b","source":{"kind":"arxiv","id":"cond-mat/0101377","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0101377","created_at":"2026-07-04T16:24:54Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0101377v2","created_at":"2026-07-04T16:24:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0101377","created_at":"2026-07-04T16:24:54Z"},{"alias_kind":"pith_short_12","alias_value":"QAWN42JBTMYT","created_at":"2026-07-04T16:24:54Z"},{"alias_kind":"pith_short_16","alias_value":"QAWN42JBTMYTPUKA","created_at":"2026-07-04T16:24:54Z"},{"alias_kind":"pith_short_8","alias_value":"QAWN42JB","created_at":"2026-07-04T16:24:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:QAWN42JBTMYTPUKADSZYFOKWH3","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/0101377","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2001-01-24T16:59:44Z","cross_cats_sorted":[],"title_canon_sha256":"113f96d4924a269ec7e807a5e5e8bbdf6d3e03c404574270c9febf338c6d2280","abstract_canon_sha256":"4f3e64d1d130a5f3207dc591eaef978e39e40f4d9b58d1dfe373847136ec8a4e"},"schema_version":"1.0"},"canonical_sha256":"802cde69219b3137d1401cb382b9563ee1f97905c4f0ed15b5859ec40a848d3b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:24:54.909573Z","signature_b64":"NnANoUGnlqr4kDX5sfDFNMrt3v3LvPq1od7GPVybTkUBXOJvXYhoGXZtAH2FV/s1dPIzDkh5uQkDYnu/HfWhAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"802cde69219b3137d1401cb382b9563ee1f97905c4f0ed15b5859ec40a848d3b","last_reissued_at":"2026-07-04T16:24:54.909156Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:24:54.909156Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/0101377","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:24:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/6Y4BrvkADFjxuAFOCRnZzX6/zYabdBjrh4BCXyoNLDVS+z1EIbDRAJo4M4aLAYs9hjyUjSGnzHuV9RP82IiBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T05:41:31.322338Z"},"content_sha256":"8ee906f0737843b64d8c77197ff780b4f47ff72b54e0fd7d34b19e1c76b5e7f3","schema_version":"1.0","event_id":"sha256:8ee906f0737843b64d8c77197ff780b4f47ff72b54e0fd7d34b19e1c76b5e7f3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:QAWN42JBTMYTPUKADSZYFOKWH3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Continuum Saltation Model for Sand Dunes","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"G. Sauermann, H. J. Herrmann, K. Kroy","submitted_at":"2001-01-24T16:59:44Z","abstract_excerpt":"We derive a phenomenological continuum saltation model for aeolian sand transport that can serve as an efficient tool for geomorphological applications. The coupled differential equations for the average density and velocity of sand in the saltation layer reproduce both known equilibrium relations for the sand flux and the time evolution of the sand flux as predicted by microscopic saltation models. The three phenomenological parameters of the model are a reference height for the grain-air interaction, an effective restitution coefficient for the grain-bed interaction, and a multiplication fac"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0101377","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/cond-mat/0101377/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T16:24:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LY/UEZfsBTC+e/arqhQNt13Xd1hDheBWY7YlVbkz0XINJQN4O6IVGCgnZEOOa1UBoaZp0W3469coszUMCFFjCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T05:41:31.322705Z"},"content_sha256":"faf77a5b02d156da9cdd7c3e5493dbc64123d64c7f66e75a3fd7034e5f9662f6","schema_version":"1.0","event_id":"sha256:faf77a5b02d156da9cdd7c3e5493dbc64123d64c7f66e75a3fd7034e5f9662f6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QAWN42JBTMYTPUKADSZYFOKWH3/bundle.json","state_url":"https://pith.science/pith/QAWN42JBTMYTPUKADSZYFOKWH3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QAWN42JBTMYTPUKADSZYFOKWH3/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":"2026-07-05T05:41:31Z","links":{"resolver":"https://pith.science/pith/QAWN42JBTMYTPUKADSZYFOKWH3","bundle":"https://pith.science/pith/QAWN42JBTMYTPUKADSZYFOKWH3/bundle.json","state":"https://pith.science/pith/QAWN42JBTMYTPUKADSZYFOKWH3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QAWN42JBTMYTPUKADSZYFOKWH3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:QAWN42JBTMYTPUKADSZYFOKWH3","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":"4f3e64d1d130a5f3207dc591eaef978e39e40f4d9b58d1dfe373847136ec8a4e","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2001-01-24T16:59:44Z","title_canon_sha256":"113f96d4924a269ec7e807a5e5e8bbdf6d3e03c404574270c9febf338c6d2280"},"schema_version":"1.0","source":{"id":"cond-mat/0101377","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0101377","created_at":"2026-07-04T16:24:54Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0101377v2","created_at":"2026-07-04T16:24:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0101377","created_at":"2026-07-04T16:24:54Z"},{"alias_kind":"pith_short_12","alias_value":"QAWN42JBTMYT","created_at":"2026-07-04T16:24:54Z"},{"alias_kind":"pith_short_16","alias_value":"QAWN42JBTMYTPUKA","created_at":"2026-07-04T16:24:54Z"},{"alias_kind":"pith_short_8","alias_value":"QAWN42JB","created_at":"2026-07-04T16:24:54Z"}],"graph_snapshots":[{"event_id":"sha256:faf77a5b02d156da9cdd7c3e5493dbc64123d64c7f66e75a3fd7034e5f9662f6","target":"graph","created_at":"2026-07-04T16:24:54Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/cond-mat/0101377/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We derive a phenomenological continuum saltation model for aeolian sand transport that can serve as an efficient tool for geomorphological applications. The coupled differential equations for the average density and velocity of sand in the saltation layer reproduce both known equilibrium relations for the sand flux and the time evolution of the sand flux as predicted by microscopic saltation models. The three phenomenological parameters of the model are a reference height for the grain-air interaction, an effective restitution coefficient for the grain-bed interaction, and a multiplication fac","authors_text":"G. Sauermann, H. J. Herrmann, K. Kroy","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2001-01-24T16:59:44Z","title":"A Continuum Saltation Model for Sand Dunes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0101377","kind":"arxiv","version":2},"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":"sha256:8ee906f0737843b64d8c77197ff780b4f47ff72b54e0fd7d34b19e1c76b5e7f3","target":"record","created_at":"2026-07-04T16:24:54Z","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":"4f3e64d1d130a5f3207dc591eaef978e39e40f4d9b58d1dfe373847136ec8a4e","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2001-01-24T16:59:44Z","title_canon_sha256":"113f96d4924a269ec7e807a5e5e8bbdf6d3e03c404574270c9febf338c6d2280"},"schema_version":"1.0","source":{"id":"cond-mat/0101377","kind":"arxiv","version":2}},"canonical_sha256":"802cde69219b3137d1401cb382b9563ee1f97905c4f0ed15b5859ec40a848d3b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"802cde69219b3137d1401cb382b9563ee1f97905c4f0ed15b5859ec40a848d3b","first_computed_at":"2026-07-04T16:24:54.909156Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:24:54.909156Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NnANoUGnlqr4kDX5sfDFNMrt3v3LvPq1od7GPVybTkUBXOJvXYhoGXZtAH2FV/s1dPIzDkh5uQkDYnu/HfWhAA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:24:54.909573Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0101377","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8ee906f0737843b64d8c77197ff780b4f47ff72b54e0fd7d34b19e1c76b5e7f3","sha256:faf77a5b02d156da9cdd7c3e5493dbc64123d64c7f66e75a3fd7034e5f9662f6"],"state_sha256":"ef11d09dcbb3855ad08748343273c910f31a131a2b4cf2fe6d2dd2a61b6bc0df"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7PZH+tQrh9xhJRjiS7Sir/MS/WyQWeIao4+xUkif2Mj2vDm7CF+ShzDMouhj9qCTCU6muneurXZlDWJWOPN6Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T05:41:31.324789Z","bundle_sha256":"38a1ced03b2de933f4075b1f5110d0b806184149471d7ee3d78a93442231b25a"}}