{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:TYQHDCRJE6VCSWC27P3JFDZJGI","short_pith_number":"pith:TYQHDCRJ","canonical_record":{"source":{"id":"cond-mat/9906321","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.dis-nn","submitted_at":"1999-06-21T17:36:12Z","cross_cats_sorted":["cond-mat.stat-mech"],"title_canon_sha256":"b96bbf97fa3c5c669bd484b687a60d3afd836dbad8598da08e9e320f1686e8d3","abstract_canon_sha256":"a0d5ac7bcfdddfaa939b7e882fd441ac3726e731ff0f2e3b36ea21a2111f4817"},"schema_version":"1.0"},"canonical_sha256":"9e20718a2927aa29585afbf6928f293230a5d1e447884d29f787ad49f5ec8164","source":{"kind":"arxiv","id":"cond-mat/9906321","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9906321","created_at":"2026-05-18T01:09:19Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9906321v1","created_at":"2026-05-18T01:09:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9906321","created_at":"2026-05-18T01:09:19Z"},{"alias_kind":"pith_short_12","alias_value":"TYQHDCRJE6VC","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"TYQHDCRJE6VCSWC2","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"TYQHDCRJ","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:TYQHDCRJE6VCSWC27P3JFDZJGI","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/9906321","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.dis-nn","submitted_at":"1999-06-21T17:36:12Z","cross_cats_sorted":["cond-mat.stat-mech"],"title_canon_sha256":"b96bbf97fa3c5c669bd484b687a60d3afd836dbad8598da08e9e320f1686e8d3","abstract_canon_sha256":"a0d5ac7bcfdddfaa939b7e882fd441ac3726e731ff0f2e3b36ea21a2111f4817"},"schema_version":"1.0"},"canonical_sha256":"9e20718a2927aa29585afbf6928f293230a5d1e447884d29f787ad49f5ec8164","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:19.794427Z","signature_b64":"vm7Qxnmlu8Y/5QKA8HIHmoCx3n9rq8WwP4upurgx8PdlYpPhfbZpqkUOnj0zU5LIA/85MG68DTIucxKSxSWEAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9e20718a2927aa29585afbf6928f293230a5d1e447884d29f787ad49f5ec8164","last_reissued_at":"2026-05-18T01:09:19.793885Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:19.793885Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/9906321","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":"2026-05-18T01:09:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3AU/85jvclvul3K0SwGlqvy+sSkRjL754GmN4cZxl3tH6QlghVqQrJjAPRTe76xBWwXkMWQ58Cp8Au4kGdbaAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T20:18:52.762481Z"},"content_sha256":"9c7760215b6d3c472ba497d4918797bbf9acad82d3b6b3b2e91c79e6422717ef","schema_version":"1.0","event_id":"sha256:9c7760215b6d3c472ba497d4918797bbf9acad82d3b6b3b2e91c79e6422717ef"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:TYQHDCRJE6VCSWC27P3JFDZJGI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Effects of construction history on the stress distribution under a sand pile","license":"","headline":"","cross_cats":["cond-mat.stat-mech"],"primary_cat":"cond-mat.dis-nn","authors_text":"Daniel Howell, D. Clark, Eric Cl\\'ement, Loic Vanel, R. P. Behringer","submitted_at":"1999-06-21T17:36:12Z","abstract_excerpt":"We report experiments on cohesionless granular piles to determine the effect of construction history on the static stress distribution. The stresses beneath the piles are monitored using a very sensitive capacitive technique. The piles are formed either by release of granular material from a relatively small output (localized source), or from a large diameter sieve (homogeneous rain). The stress profiles resulting from localized source inputs have a clear stress dip near the center of the pile while the results from an homogeneous rain show no stress dip. We also show that the stress profiles "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9906321","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":"2026-05-18T01:09:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"puu/ZHNkG3g5Fu5/oWhVqFNKEAXVvFt62EoiUyKEfd0ry4n6cQQPGHmLNh05e1Vw32q/+aI+K96CyO1ITGujBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T20:18:52.762827Z"},"content_sha256":"0410c76db43f2abbcb4a37df367af4c135e304e9503965b798fac9cafbf1fb1b","schema_version":"1.0","event_id":"sha256:0410c76db43f2abbcb4a37df367af4c135e304e9503965b798fac9cafbf1fb1b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TYQHDCRJE6VCSWC27P3JFDZJGI/bundle.json","state_url":"https://pith.science/pith/TYQHDCRJE6VCSWC27P3JFDZJGI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TYQHDCRJE6VCSWC27P3JFDZJGI/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":"2026-06-20T20:18:52Z","links":{"resolver":"https://pith.science/pith/TYQHDCRJE6VCSWC27P3JFDZJGI","bundle":"https://pith.science/pith/TYQHDCRJE6VCSWC27P3JFDZJGI/bundle.json","state":"https://pith.science/pith/TYQHDCRJE6VCSWC27P3JFDZJGI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TYQHDCRJE6VCSWC27P3JFDZJGI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:TYQHDCRJE6VCSWC27P3JFDZJGI","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":"a0d5ac7bcfdddfaa939b7e882fd441ac3726e731ff0f2e3b36ea21a2111f4817","cross_cats_sorted":["cond-mat.stat-mech"],"license":"","primary_cat":"cond-mat.dis-nn","submitted_at":"1999-06-21T17:36:12Z","title_canon_sha256":"b96bbf97fa3c5c669bd484b687a60d3afd836dbad8598da08e9e320f1686e8d3"},"schema_version":"1.0","source":{"id":"cond-mat/9906321","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9906321","created_at":"2026-05-18T01:09:19Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9906321v1","created_at":"2026-05-18T01:09:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9906321","created_at":"2026-05-18T01:09:19Z"},{"alias_kind":"pith_short_12","alias_value":"TYQHDCRJE6VC","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"TYQHDCRJE6VCSWC2","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"TYQHDCRJ","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:0410c76db43f2abbcb4a37df367af4c135e304e9503965b798fac9cafbf1fb1b","target":"graph","created_at":"2026-05-18T01:09:19Z","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 report experiments on cohesionless granular piles to determine the effect of construction history on the static stress distribution. The stresses beneath the piles are monitored using a very sensitive capacitive technique. The piles are formed either by release of granular material from a relatively small output (localized source), or from a large diameter sieve (homogeneous rain). The stress profiles resulting from localized source inputs have a clear stress dip near the center of the pile while the results from an homogeneous rain show no stress dip. We also show that the stress profiles ","authors_text":"Daniel Howell, D. Clark, Eric Cl\\'ement, Loic Vanel, R. P. Behringer","cross_cats":["cond-mat.stat-mech"],"headline":"","license":"","primary_cat":"cond-mat.dis-nn","submitted_at":"1999-06-21T17:36:12Z","title":"Effects of construction history on the stress distribution under a sand pile"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9906321","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":"sha256:9c7760215b6d3c472ba497d4918797bbf9acad82d3b6b3b2e91c79e6422717ef","target":"record","created_at":"2026-05-18T01:09:19Z","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":"a0d5ac7bcfdddfaa939b7e882fd441ac3726e731ff0f2e3b36ea21a2111f4817","cross_cats_sorted":["cond-mat.stat-mech"],"license":"","primary_cat":"cond-mat.dis-nn","submitted_at":"1999-06-21T17:36:12Z","title_canon_sha256":"b96bbf97fa3c5c669bd484b687a60d3afd836dbad8598da08e9e320f1686e8d3"},"schema_version":"1.0","source":{"id":"cond-mat/9906321","kind":"arxiv","version":1}},"canonical_sha256":"9e20718a2927aa29585afbf6928f293230a5d1e447884d29f787ad49f5ec8164","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9e20718a2927aa29585afbf6928f293230a5d1e447884d29f787ad49f5ec8164","first_computed_at":"2026-05-18T01:09:19.793885Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:19.793885Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vm7Qxnmlu8Y/5QKA8HIHmoCx3n9rq8WwP4upurgx8PdlYpPhfbZpqkUOnj0zU5LIA/85MG68DTIucxKSxSWEAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:19.794427Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9906321","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9c7760215b6d3c472ba497d4918797bbf9acad82d3b6b3b2e91c79e6422717ef","sha256:0410c76db43f2abbcb4a37df367af4c135e304e9503965b798fac9cafbf1fb1b"],"state_sha256":"1d843b4a814eafbcd6dd269cd4b07dc58fd9c278bb843b8019f88623b8b742c1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aUmh4Bpc8gA4foGXnf3Zm9AkmKqoHQgCqJuoSFiMhDQ5nxUZO7znp0z7awbtbGyQEKketljV9o6b4Kn0A0/tBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T20:18:52.764787Z","bundle_sha256":"78f2542da9347f5f6c174273fa92eb44bc6dd9ef1f2a2b838b504b1715bc79e9"}}