{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:RU7SKUJM2D22FYFSMIPL5VS4PL","short_pith_number":"pith:RU7SKUJM","canonical_record":{"source":{"id":"0801.4722","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.soft","submitted_at":"2008-01-30T17:29:40Z","cross_cats_sorted":[],"title_canon_sha256":"581f504ee84acf228c7acda7ebee5f68272dc9eacf2e9e45fa2592087bc690c3","abstract_canon_sha256":"3fcf0412fbb386cf8e73d9f61080ec4bf2e15809c5bcb2b4007bade84e76a34a"},"schema_version":"1.0"},"canonical_sha256":"8d3f25512cd0f5a2e0b2621ebed65c7ae4f90583a7a3276411d002399b21f5b0","source":{"kind":"arxiv","id":"0801.4722","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0801.4722","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"arxiv_version","alias_value":"0801.4722v1","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.4722","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"pith_short_12","alias_value":"RU7SKUJM2D22","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"RU7SKUJM2D22FYFS","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"RU7SKUJM","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:RU7SKUJM2D22FYFSMIPL5VS4PL","target":"record","payload":{"canonical_record":{"source":{"id":"0801.4722","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.soft","submitted_at":"2008-01-30T17:29:40Z","cross_cats_sorted":[],"title_canon_sha256":"581f504ee84acf228c7acda7ebee5f68272dc9eacf2e9e45fa2592087bc690c3","abstract_canon_sha256":"3fcf0412fbb386cf8e73d9f61080ec4bf2e15809c5bcb2b4007bade84e76a34a"},"schema_version":"1.0"},"canonical_sha256":"8d3f25512cd0f5a2e0b2621ebed65c7ae4f90583a7a3276411d002399b21f5b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:34:00.325290Z","signature_b64":"Bjas5M5HzTajzscc+IwrbRt6M5DSic+pYMQYR6aCGoBXVO8n3qPC0g6YUWNb1t4cX2i0QgZL0/KX7l/6qrD9Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8d3f25512cd0f5a2e0b2621ebed65c7ae4f90583a7a3276411d002399b21f5b0","last_reissued_at":"2026-05-18T03:34:00.324435Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:34:00.324435Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0801.4722","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":"2026-05-18T03:34:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tB0zWH+zw2pzWaKJFlJ5q2rkJnwAsEnQ5Etns6IqYOWI4RV1vml1ZXyl0jkgAEb1Vr5Su6BitFqT4tAS2IuIDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T14:18:33.186240Z"},"content_sha256":"fb57ce40be32b3905cbd900e5fb10bb32c413c838e8c4e2d1083dc47d175e091","schema_version":"1.0","event_id":"sha256:fb57ce40be32b3905cbd900e5fb10bb32c413c838e8c4e2d1083dc47d175e091"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:RU7SKUJM2D22FYFSMIPL5VS4PL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Particle-scale origins of shear strength in granular media","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Farhang Radjai (LMGC)","submitted_at":"2008-01-30T17:29:40Z","abstract_excerpt":"The shear strength of cohesionless granular materials is generally attributed to the compactness or anisotropy of their microstructure. An open issue is how such compact or anisotropic microstructures, and thus the shear strength, depend on the particle properties. We first recall the role of fabric and force anisotropies with respect to the critical-state shear stress. Then, a model of accessible geometrical states in terms of particle connectivity and contact anisotropy is presented. This model incorporates in a simple way the fact that, due to steric exclusions, the highest levels of connec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.4722","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":"2026-05-18T03:34:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w/lUICOVWD/cVKXvnKu1MwIb8pc6w0NCXP23PEJSkPY68jKjtt2bpG0JhYiZfLyQLOSIwREQkV8XER0jHFT5CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T14:18:33.186613Z"},"content_sha256":"b84d7e25beaaa6e11e19695844dbe38f825431595819b214177c295bd795fac0","schema_version":"1.0","event_id":"sha256:b84d7e25beaaa6e11e19695844dbe38f825431595819b214177c295bd795fac0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RU7SKUJM2D22FYFSMIPL5VS4PL/bundle.json","state_url":"https://pith.science/pith/RU7SKUJM2D22FYFSMIPL5VS4PL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RU7SKUJM2D22FYFSMIPL5VS4PL/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":"2026-06-27T14:18:33Z","links":{"resolver":"https://pith.science/pith/RU7SKUJM2D22FYFSMIPL5VS4PL","bundle":"https://pith.science/pith/RU7SKUJM2D22FYFSMIPL5VS4PL/bundle.json","state":"https://pith.science/pith/RU7SKUJM2D22FYFSMIPL5VS4PL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RU7SKUJM2D22FYFSMIPL5VS4PL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:RU7SKUJM2D22FYFSMIPL5VS4PL","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":"3fcf0412fbb386cf8e73d9f61080ec4bf2e15809c5bcb2b4007bade84e76a34a","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.soft","submitted_at":"2008-01-30T17:29:40Z","title_canon_sha256":"581f504ee84acf228c7acda7ebee5f68272dc9eacf2e9e45fa2592087bc690c3"},"schema_version":"1.0","source":{"id":"0801.4722","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0801.4722","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"arxiv_version","alias_value":"0801.4722v1","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.4722","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"pith_short_12","alias_value":"RU7SKUJM2D22","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"RU7SKUJM2D22FYFS","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"RU7SKUJM","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:b84d7e25beaaa6e11e19695844dbe38f825431595819b214177c295bd795fac0","target":"graph","created_at":"2026-05-18T03:34:00Z","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 shear strength of cohesionless granular materials is generally attributed to the compactness or anisotropy of their microstructure. An open issue is how such compact or anisotropic microstructures, and thus the shear strength, depend on the particle properties. We first recall the role of fabric and force anisotropies with respect to the critical-state shear stress. Then, a model of accessible geometrical states in terms of particle connectivity and contact anisotropy is presented. This model incorporates in a simple way the fact that, due to steric exclusions, the highest levels of connec","authors_text":"Farhang Radjai (LMGC)","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.soft","submitted_at":"2008-01-30T17:29:40Z","title":"Particle-scale origins of shear strength in granular media"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.4722","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:fb57ce40be32b3905cbd900e5fb10bb32c413c838e8c4e2d1083dc47d175e091","target":"record","created_at":"2026-05-18T03:34:00Z","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":"3fcf0412fbb386cf8e73d9f61080ec4bf2e15809c5bcb2b4007bade84e76a34a","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.soft","submitted_at":"2008-01-30T17:29:40Z","title_canon_sha256":"581f504ee84acf228c7acda7ebee5f68272dc9eacf2e9e45fa2592087bc690c3"},"schema_version":"1.0","source":{"id":"0801.4722","kind":"arxiv","version":1}},"canonical_sha256":"8d3f25512cd0f5a2e0b2621ebed65c7ae4f90583a7a3276411d002399b21f5b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8d3f25512cd0f5a2e0b2621ebed65c7ae4f90583a7a3276411d002399b21f5b0","first_computed_at":"2026-05-18T03:34:00.324435Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:34:00.324435Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Bjas5M5HzTajzscc+IwrbRt6M5DSic+pYMQYR6aCGoBXVO8n3qPC0g6YUWNb1t4cX2i0QgZL0/KX7l/6qrD9Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:34:00.325290Z","signed_message":"canonical_sha256_bytes"},"source_id":"0801.4722","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fb57ce40be32b3905cbd900e5fb10bb32c413c838e8c4e2d1083dc47d175e091","sha256:b84d7e25beaaa6e11e19695844dbe38f825431595819b214177c295bd795fac0"],"state_sha256":"ac4bf96b1667f1e8e4222aaf10cd215204283dece669a9fb7fa8704dee9a999f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mp/drPjwtJrTnxc7CWnJH6QTWCf2xUAE4BTCzv63Zj/bmNaIglaMQZgSk6KWZmVgS4HPIHsM5gaYppML2kiVAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T14:18:33.188425Z","bundle_sha256":"58c76d0a62f8c985f1b645e5729618910b61b4e4022bd81ec03ab5b25941a6ae"}}