{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:ANFM7TAFFZFQGOZQZTGSYFNVKN","short_pith_number":"pith:ANFM7TAF","canonical_record":{"source":{"id":"1209.0531","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2012-09-04T05:55:47Z","cross_cats_sorted":[],"title_canon_sha256":"6d05f679e723b97fddc5cc778392990dc0af128cf5004d0cef6d70bdf5807bd5","abstract_canon_sha256":"c1789b5c46f4b3c02898dd4f17073cc6271e24aff57cf4a657b28c7c6178f5ac"},"schema_version":"1.0"},"canonical_sha256":"034acfcc052e4b033b30cccd2c15b5534bbce0dc496f0017f1dcca13eeea854e","source":{"kind":"arxiv","id":"1209.0531","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.0531","created_at":"2026-05-18T01:54:47Z"},{"alias_kind":"arxiv_version","alias_value":"1209.0531v2","created_at":"2026-05-18T01:54:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.0531","created_at":"2026-05-18T01:54:47Z"},{"alias_kind":"pith_short_12","alias_value":"ANFM7TAFFZFQ","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"ANFM7TAFFZFQGOZQ","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"ANFM7TAF","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:ANFM7TAFFZFQGOZQZTGSYFNVKN","target":"record","payload":{"canonical_record":{"source":{"id":"1209.0531","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2012-09-04T05:55:47Z","cross_cats_sorted":[],"title_canon_sha256":"6d05f679e723b97fddc5cc778392990dc0af128cf5004d0cef6d70bdf5807bd5","abstract_canon_sha256":"c1789b5c46f4b3c02898dd4f17073cc6271e24aff57cf4a657b28c7c6178f5ac"},"schema_version":"1.0"},"canonical_sha256":"034acfcc052e4b033b30cccd2c15b5534bbce0dc496f0017f1dcca13eeea854e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:54:47.686377Z","signature_b64":"fzGo6Cc3EBeJZFP0ohGw9v83x/SpGiVu6UaeWnbJKtmXXNPZB0XUm38yAmAg74DILuTmj253BaL95EvrYY41Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"034acfcc052e4b033b30cccd2c15b5534bbce0dc496f0017f1dcca13eeea854e","last_reissued_at":"2026-05-18T01:54:47.685716Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:54:47.685716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.0531","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":"2026-05-18T01:54:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X4ubuzXxl/flhKyUqnkiBT/BB9XMElNCUw2Us77bXx2m+KjvultBwkJcv6IBohjJ6zh3B6sizWzNelEfWCU5Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T02:06:14.712473Z"},"content_sha256":"846058e0d42cc1985ff6005e367714b089d4967e8ecf3e56f839fed81e8d6fca","schema_version":"1.0","event_id":"sha256:846058e0d42cc1985ff6005e367714b089d4967e8ecf3e56f839fed81e8d6fca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:ANFM7TAFFZFQGOZQZTGSYFNVKN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Wall forces on a sphere in a rotating liquid-filled cylinder","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Chao Sun, Jarich van der Molen, Leen van Wijngaarden, Yoshiyuki Tagawa","submitted_at":"2012-09-04T05:55:47Z","abstract_excerpt":"We experimentally study the behavior of a particle slightly denser than the surrounding liquid in solid body rotating flow. Earlier work revealed that a heavy particle has an unstable equilibrium point in unbounded rotation flows. In the confinement of the rotational flow by a cylindrical wall a heavy sphere with density 1.05 g/cm$^3$ describes an orbital motion in our experiments. This is due to the effect of the wall near the sphere, i.e. a repulsive force ($F_w$). We model $F_w$ on the sphere as a function of the distance from the wall ($L$): $F_W \\propto L^{-4}$ as proposed by Takemura and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.0531","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":""},"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":"2026-05-18T01:54:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bonJ8MdNjmGK94h/V5hUGm5IptYd+DpYh2keHzPi2i/sbeG8uVBge1NmFa2ZncKRxCLWUbqdGeupKD//qUpRCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T02:06:14.713018Z"},"content_sha256":"c96d3594d0985853a86352b7ab113e36224000536600ada67c5647f4554375d3","schema_version":"1.0","event_id":"sha256:c96d3594d0985853a86352b7ab113e36224000536600ada67c5647f4554375d3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ANFM7TAFFZFQGOZQZTGSYFNVKN/bundle.json","state_url":"https://pith.science/pith/ANFM7TAFFZFQGOZQZTGSYFNVKN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ANFM7TAFFZFQGOZQZTGSYFNVKN/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":"2026-06-07T02:06:14Z","links":{"resolver":"https://pith.science/pith/ANFM7TAFFZFQGOZQZTGSYFNVKN","bundle":"https://pith.science/pith/ANFM7TAFFZFQGOZQZTGSYFNVKN/bundle.json","state":"https://pith.science/pith/ANFM7TAFFZFQGOZQZTGSYFNVKN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ANFM7TAFFZFQGOZQZTGSYFNVKN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:ANFM7TAFFZFQGOZQZTGSYFNVKN","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":"c1789b5c46f4b3c02898dd4f17073cc6271e24aff57cf4a657b28c7c6178f5ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2012-09-04T05:55:47Z","title_canon_sha256":"6d05f679e723b97fddc5cc778392990dc0af128cf5004d0cef6d70bdf5807bd5"},"schema_version":"1.0","source":{"id":"1209.0531","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.0531","created_at":"2026-05-18T01:54:47Z"},{"alias_kind":"arxiv_version","alias_value":"1209.0531v2","created_at":"2026-05-18T01:54:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.0531","created_at":"2026-05-18T01:54:47Z"},{"alias_kind":"pith_short_12","alias_value":"ANFM7TAFFZFQ","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"ANFM7TAFFZFQGOZQ","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"ANFM7TAF","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:c96d3594d0985853a86352b7ab113e36224000536600ada67c5647f4554375d3","target":"graph","created_at":"2026-05-18T01:54:47Z","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 experimentally study the behavior of a particle slightly denser than the surrounding liquid in solid body rotating flow. Earlier work revealed that a heavy particle has an unstable equilibrium point in unbounded rotation flows. In the confinement of the rotational flow by a cylindrical wall a heavy sphere with density 1.05 g/cm$^3$ describes an orbital motion in our experiments. This is due to the effect of the wall near the sphere, i.e. a repulsive force ($F_w$). We model $F_w$ on the sphere as a function of the distance from the wall ($L$): $F_W \\propto L^{-4}$ as proposed by Takemura and","authors_text":"Chao Sun, Jarich van der Molen, Leen van Wijngaarden, Yoshiyuki Tagawa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2012-09-04T05:55:47Z","title":"Wall forces on a sphere in a rotating liquid-filled cylinder"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.0531","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":"sha256:846058e0d42cc1985ff6005e367714b089d4967e8ecf3e56f839fed81e8d6fca","target":"record","created_at":"2026-05-18T01:54:47Z","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":"c1789b5c46f4b3c02898dd4f17073cc6271e24aff57cf4a657b28c7c6178f5ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2012-09-04T05:55:47Z","title_canon_sha256":"6d05f679e723b97fddc5cc778392990dc0af128cf5004d0cef6d70bdf5807bd5"},"schema_version":"1.0","source":{"id":"1209.0531","kind":"arxiv","version":2}},"canonical_sha256":"034acfcc052e4b033b30cccd2c15b5534bbce0dc496f0017f1dcca13eeea854e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"034acfcc052e4b033b30cccd2c15b5534bbce0dc496f0017f1dcca13eeea854e","first_computed_at":"2026-05-18T01:54:47.685716Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:47.685716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fzGo6Cc3EBeJZFP0ohGw9v83x/SpGiVu6UaeWnbJKtmXXNPZB0XUm38yAmAg74DILuTmj253BaL95EvrYY41Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:47.686377Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.0531","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:846058e0d42cc1985ff6005e367714b089d4967e8ecf3e56f839fed81e8d6fca","sha256:c96d3594d0985853a86352b7ab113e36224000536600ada67c5647f4554375d3"],"state_sha256":"392185b9b5266d195ec814c5cdab62e3c94ac7f946724ea3ca6cdc9801d69285"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XQX14+8JrwUjpe7ZwMdnri9Q4HPosdofiGLm9qXgi6zcD0fdhmUz08DIpafKSHYj9vTYnySy2rB58CXLj1okBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T02:06:14.715530Z","bundle_sha256":"63d1719ad21f1762ba70f42c5888fcc45ebe720581fd1b9b01319b01c1c2b6f8"}}