{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:U6BCRTM653NVX3ZQ372CT3LYMU","short_pith_number":"pith:U6BCRTM6","canonical_record":{"source":{"id":"1301.7277","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2013-01-30T16:32:05Z","cross_cats_sorted":["q-bio.QM"],"title_canon_sha256":"27d236a6e08d292ac539bf1d5baf5dc63ba0564f16c932f866c6533bdf51b5a1","abstract_canon_sha256":"69b8ff252422a375e40e6f2921182b0840a72941f5b62fa423754ea34c7cd9f8"},"schema_version":"1.0"},"canonical_sha256":"a78228cd9eeedb5bef30dff429ed78652b5e76c78131299547ec05a49a57147a","source":{"kind":"arxiv","id":"1301.7277","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.7277","created_at":"2026-05-18T03:07:54Z"},{"alias_kind":"arxiv_version","alias_value":"1301.7277v2","created_at":"2026-05-18T03:07:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.7277","created_at":"2026-05-18T03:07:54Z"},{"alias_kind":"pith_short_12","alias_value":"U6BCRTM653NV","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"U6BCRTM653NVX3ZQ","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"U6BCRTM6","created_at":"2026-05-18T12:28:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:U6BCRTM653NVX3ZQ372CT3LYMU","target":"record","payload":{"canonical_record":{"source":{"id":"1301.7277","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2013-01-30T16:32:05Z","cross_cats_sorted":["q-bio.QM"],"title_canon_sha256":"27d236a6e08d292ac539bf1d5baf5dc63ba0564f16c932f866c6533bdf51b5a1","abstract_canon_sha256":"69b8ff252422a375e40e6f2921182b0840a72941f5b62fa423754ea34c7cd9f8"},"schema_version":"1.0"},"canonical_sha256":"a78228cd9eeedb5bef30dff429ed78652b5e76c78131299547ec05a49a57147a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:07:54.794749Z","signature_b64":"9mtirn6eKI9umFfGgdLxmlvIZ0bnHmeuEIsmnOprTfiThvGlHOawmBB6BvC9IFT2CPsVXwF3ILeQ+wnAKpzbAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a78228cd9eeedb5bef30dff429ed78652b5e76c78131299547ec05a49a57147a","last_reissued_at":"2026-05-18T03:07:54.794147Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:07:54.794147Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1301.7277","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":"2026-05-18T03:07:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O+3DDTOp3HO8L6BfmM+47nknjckmtAdiufUWUnK3sewsk13SCZeZAH0nXKbfXUIuJSuTpTGBVT7MIKGsaAH1BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T05:01:42.515886Z"},"content_sha256":"96b8a1f58aaa9c856756f7529774c38fab970dceaa240a4673ddcaed402ac14e","schema_version":"1.0","event_id":"sha256:96b8a1f58aaa9c856756f7529774c38fab970dceaa240a4673ddcaed402ac14e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:U6BCRTM653NVX3ZQ372CT3LYMU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Collective thermoregulation in bee clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["q-bio.QM"],"primary_cat":"q-bio.PE","authors_text":"L. Mahadevan, Samuel A. Ocko","submitted_at":"2013-01-30T16:32:05Z","abstract_excerpt":"Swarming is an essential part of honeybee behaviour, wherein thousands of bees cling onto each other to form a dense cluster that may be exposed to the environment for several days. This cluster has the ability to maintain its core temperature actively without a central controller, and raises the question of how this is achieved. We suggest that the swarm cluster is akin to an active porous structure whose functional requirement is to adjust to outside conditions by varying its porosity to control its core temperature. Using a continuum model that takes the form of a set of advection-diffusion"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.7277","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":"2026-05-18T03:07:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8EuW8luiocsi5UMuGgSBQSRt8w/jYH6Z7e2tf2pq1o+1DJBBIQqVVvwoHIY/BaP01sOv0Ae/y2cCAjpe9489CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T05:01:42.516616Z"},"content_sha256":"827e0f911e6da6f46122ac304d73271e4add2a49042b399c7d909f52b42a0461","schema_version":"1.0","event_id":"sha256:827e0f911e6da6f46122ac304d73271e4add2a49042b399c7d909f52b42a0461"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U6BCRTM653NVX3ZQ372CT3LYMU/bundle.json","state_url":"https://pith.science/pith/U6BCRTM653NVX3ZQ372CT3LYMU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U6BCRTM653NVX3ZQ372CT3LYMU/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":"2026-05-20T05:01:42Z","links":{"resolver":"https://pith.science/pith/U6BCRTM653NVX3ZQ372CT3LYMU","bundle":"https://pith.science/pith/U6BCRTM653NVX3ZQ372CT3LYMU/bundle.json","state":"https://pith.science/pith/U6BCRTM653NVX3ZQ372CT3LYMU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U6BCRTM653NVX3ZQ372CT3LYMU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:U6BCRTM653NVX3ZQ372CT3LYMU","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":"69b8ff252422a375e40e6f2921182b0840a72941f5b62fa423754ea34c7cd9f8","cross_cats_sorted":["q-bio.QM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2013-01-30T16:32:05Z","title_canon_sha256":"27d236a6e08d292ac539bf1d5baf5dc63ba0564f16c932f866c6533bdf51b5a1"},"schema_version":"1.0","source":{"id":"1301.7277","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.7277","created_at":"2026-05-18T03:07:54Z"},{"alias_kind":"arxiv_version","alias_value":"1301.7277v2","created_at":"2026-05-18T03:07:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.7277","created_at":"2026-05-18T03:07:54Z"},{"alias_kind":"pith_short_12","alias_value":"U6BCRTM653NV","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"U6BCRTM653NVX3ZQ","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"U6BCRTM6","created_at":"2026-05-18T12:28:02Z"}],"graph_snapshots":[{"event_id":"sha256:827e0f911e6da6f46122ac304d73271e4add2a49042b399c7d909f52b42a0461","target":"graph","created_at":"2026-05-18T03:07:54Z","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"},"paper":{"abstract_excerpt":"Swarming is an essential part of honeybee behaviour, wherein thousands of bees cling onto each other to form a dense cluster that may be exposed to the environment for several days. This cluster has the ability to maintain its core temperature actively without a central controller, and raises the question of how this is achieved. We suggest that the swarm cluster is akin to an active porous structure whose functional requirement is to adjust to outside conditions by varying its porosity to control its core temperature. Using a continuum model that takes the form of a set of advection-diffusion","authors_text":"L. Mahadevan, Samuel A. Ocko","cross_cats":["q-bio.QM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2013-01-30T16:32:05Z","title":"Collective thermoregulation in bee clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.7277","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":"sha256:96b8a1f58aaa9c856756f7529774c38fab970dceaa240a4673ddcaed402ac14e","target":"record","created_at":"2026-05-18T03:07:54Z","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":"69b8ff252422a375e40e6f2921182b0840a72941f5b62fa423754ea34c7cd9f8","cross_cats_sorted":["q-bio.QM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2013-01-30T16:32:05Z","title_canon_sha256":"27d236a6e08d292ac539bf1d5baf5dc63ba0564f16c932f866c6533bdf51b5a1"},"schema_version":"1.0","source":{"id":"1301.7277","kind":"arxiv","version":2}},"canonical_sha256":"a78228cd9eeedb5bef30dff429ed78652b5e76c78131299547ec05a49a57147a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a78228cd9eeedb5bef30dff429ed78652b5e76c78131299547ec05a49a57147a","first_computed_at":"2026-05-18T03:07:54.794147Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:07:54.794147Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9mtirn6eKI9umFfGgdLxmlvIZ0bnHmeuEIsmnOprTfiThvGlHOawmBB6BvC9IFT2CPsVXwF3ILeQ+wnAKpzbAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:07:54.794749Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.7277","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:96b8a1f58aaa9c856756f7529774c38fab970dceaa240a4673ddcaed402ac14e","sha256:827e0f911e6da6f46122ac304d73271e4add2a49042b399c7d909f52b42a0461"],"state_sha256":"ac278d4b606047a754cdfd332cede7d6ca32de620bdeba2067d4fd24def5333f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S2z+IvIzsJH0e4isvPoj0M7sDLtWrhrmuMAF/qeLlGC2SDWgMGyhwqhzKqQyFQMFSXK2FeNU1pG0v8eSQX9wDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T05:01:42.520534Z","bundle_sha256":"4cdc1ec815de3966260f869c9572178d3e14a06ce7c990f820434f4586b1db4c"}}