{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:PXSBZG222PR36EGECX4HTXUP34","short_pith_number":"pith:PXSBZG22","canonical_record":{"source":{"id":"1507.05354","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-07-19T23:29:18Z","cross_cats_sorted":[],"title_canon_sha256":"590fdb39b607ff5b013d8bea0f9c986b679bd8b84889a719d34ff62ba72f9265","abstract_canon_sha256":"6a7713e3f65c0522869c08e19ceff0267257085dd8dce1fd4579489a5a2df43a"},"schema_version":"1.0"},"canonical_sha256":"7de41c9b5ad3e3bf10c415f879de8fdf04553df29beaf757aa19b61228f8751b","source":{"kind":"arxiv","id":"1507.05354","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.05354","created_at":"2026-05-18T00:48:20Z"},{"alias_kind":"arxiv_version","alias_value":"1507.05354v1","created_at":"2026-05-18T00:48:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.05354","created_at":"2026-05-18T00:48:20Z"},{"alias_kind":"pith_short_12","alias_value":"PXSBZG222PR3","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"PXSBZG222PR36EGE","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"PXSBZG22","created_at":"2026-05-18T12:29:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:PXSBZG222PR36EGECX4HTXUP34","target":"record","payload":{"canonical_record":{"source":{"id":"1507.05354","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-07-19T23:29:18Z","cross_cats_sorted":[],"title_canon_sha256":"590fdb39b607ff5b013d8bea0f9c986b679bd8b84889a719d34ff62ba72f9265","abstract_canon_sha256":"6a7713e3f65c0522869c08e19ceff0267257085dd8dce1fd4579489a5a2df43a"},"schema_version":"1.0"},"canonical_sha256":"7de41c9b5ad3e3bf10c415f879de8fdf04553df29beaf757aa19b61228f8751b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:48:20.644467Z","signature_b64":"Cho922PTgmroQpatMTeUnH5jDjwMzVyV3nMUMxl3/nWWk66qan/xeeuobhD14fSby+MahnEH9uuxQHIZEv+EAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7de41c9b5ad3e3bf10c415f879de8fdf04553df29beaf757aa19b61228f8751b","last_reissued_at":"2026-05-18T00:48:20.643663Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:48:20.643663Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.05354","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":"2026-05-18T00:48:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"28s6eJY3tieSiZzF43M1lRu0bJeDV270CPxKLPh4MJhdSGgqeprpgJJ/qqZp7L/21m9pt8xX7OdF4u30wjufBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T21:21:48.174710Z"},"content_sha256":"7fd522fd7c1d1cde048cc5a58f3961dc9601277f41681c2c80373beca7586647","schema_version":"1.0","event_id":"sha256:7fd522fd7c1d1cde048cc5a58f3961dc9601277f41681c2c80373beca7586647"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:PXSBZG222PR36EGECX4HTXUP34","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Kinematic flow patterns in slow deformation of a dense granular material","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Anirban Mahato, Koushik Viswanathan, Srinivasan Chandrasekar, Tejas G. Murthy, Tomasz Koziara","submitted_at":"2015-07-19T23:29:18Z","abstract_excerpt":"The kinematic flow pattern in slow deformation of a model dense granular medium is studied at high resolution using \\emph{in situ} imaging, coupled with particle tracking. The deformation configuration is indentation by a flat punch under macroscopic plane-strain conditions. Using a general analysis method, velocity gradients and deformation fields are obtained from the disordered grain arrangement, enabling flow characteristics to be quantified. The key observations are the formation of a stagnation zone, as in dilute granular flow past obstacles; occurrence of vortices in the flow immediatel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.05354","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":"2026-05-18T00:48:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iTCYMa+qQhyLLhR5pGiuUloUHP18rv5OzunMunisWyXHcZaA80Q45Nm2xuKs0tJOVTuVknj/b4bIrfjB6nmhCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T21:21:48.175397Z"},"content_sha256":"7abeb87bff7b491549087f10241a51ce18fd2806ca2e9053e413b7f3ce892035","schema_version":"1.0","event_id":"sha256:7abeb87bff7b491549087f10241a51ce18fd2806ca2e9053e413b7f3ce892035"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PXSBZG222PR36EGECX4HTXUP34/bundle.json","state_url":"https://pith.science/pith/PXSBZG222PR36EGECX4HTXUP34/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PXSBZG222PR36EGECX4HTXUP34/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":"2026-06-11T21:21:48Z","links":{"resolver":"https://pith.science/pith/PXSBZG222PR36EGECX4HTXUP34","bundle":"https://pith.science/pith/PXSBZG222PR36EGECX4HTXUP34/bundle.json","state":"https://pith.science/pith/PXSBZG222PR36EGECX4HTXUP34/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PXSBZG222PR36EGECX4HTXUP34/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:PXSBZG222PR36EGECX4HTXUP34","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":"6a7713e3f65c0522869c08e19ceff0267257085dd8dce1fd4579489a5a2df43a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-07-19T23:29:18Z","title_canon_sha256":"590fdb39b607ff5b013d8bea0f9c986b679bd8b84889a719d34ff62ba72f9265"},"schema_version":"1.0","source":{"id":"1507.05354","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.05354","created_at":"2026-05-18T00:48:20Z"},{"alias_kind":"arxiv_version","alias_value":"1507.05354v1","created_at":"2026-05-18T00:48:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.05354","created_at":"2026-05-18T00:48:20Z"},{"alias_kind":"pith_short_12","alias_value":"PXSBZG222PR3","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"PXSBZG222PR36EGE","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"PXSBZG22","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:7abeb87bff7b491549087f10241a51ce18fd2806ca2e9053e413b7f3ce892035","target":"graph","created_at":"2026-05-18T00:48:20Z","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 kinematic flow pattern in slow deformation of a model dense granular medium is studied at high resolution using \\emph{in situ} imaging, coupled with particle tracking. The deformation configuration is indentation by a flat punch under macroscopic plane-strain conditions. Using a general analysis method, velocity gradients and deformation fields are obtained from the disordered grain arrangement, enabling flow characteristics to be quantified. The key observations are the formation of a stagnation zone, as in dilute granular flow past obstacles; occurrence of vortices in the flow immediatel","authors_text":"Anirban Mahato, Koushik Viswanathan, Srinivasan Chandrasekar, Tejas G. Murthy, Tomasz Koziara","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-07-19T23:29:18Z","title":"Kinematic flow patterns in slow deformation of a dense granular material"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.05354","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":"sha256:7fd522fd7c1d1cde048cc5a58f3961dc9601277f41681c2c80373beca7586647","target":"record","created_at":"2026-05-18T00:48:20Z","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":"6a7713e3f65c0522869c08e19ceff0267257085dd8dce1fd4579489a5a2df43a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-07-19T23:29:18Z","title_canon_sha256":"590fdb39b607ff5b013d8bea0f9c986b679bd8b84889a719d34ff62ba72f9265"},"schema_version":"1.0","source":{"id":"1507.05354","kind":"arxiv","version":1}},"canonical_sha256":"7de41c9b5ad3e3bf10c415f879de8fdf04553df29beaf757aa19b61228f8751b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7de41c9b5ad3e3bf10c415f879de8fdf04553df29beaf757aa19b61228f8751b","first_computed_at":"2026-05-18T00:48:20.643663Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:48:20.643663Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Cho922PTgmroQpatMTeUnH5jDjwMzVyV3nMUMxl3/nWWk66qan/xeeuobhD14fSby+MahnEH9uuxQHIZEv+EAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:48:20.644467Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.05354","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7fd522fd7c1d1cde048cc5a58f3961dc9601277f41681c2c80373beca7586647","sha256:7abeb87bff7b491549087f10241a51ce18fd2806ca2e9053e413b7f3ce892035"],"state_sha256":"79cb9d0a8749c0a668be34c725b5aceb9a8e7d49b52c125a0de207470409ef08"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cFyEeEQaTxm/mdl45DMCf6O+HAcLWKn1uYR5BYwhM0Ntz3GLN7DNLzmeOgQ5JKd4fbDz4n6PTYcLNJvtHnGGCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T21:21:48.179253Z","bundle_sha256":"a29bcc65fb8712138489cff12821de0e6e392ceb9cbf6da9faba95341735690d"}}