{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:PIGS4IWPK6B5EXYIPEYE4CQOGP","short_pith_number":"pith:PIGS4IWP","canonical_record":{"source":{"id":"1109.1511","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-09-07T16:49:41Z","cross_cats_sorted":[],"title_canon_sha256":"93a0ffe7fe3abe525d8519331081d809fbe3c1058e17305da147074f8200fff1","abstract_canon_sha256":"92e4f83337f5b5435ca88c372cee1b6ca62893c41d4e4ae7d725dbb077fc2f75"},"schema_version":"1.0"},"canonical_sha256":"7a0d2e22cf5783d25f0879304e0a0e33d83b53db2b147238d7e52f404ac77e61","source":{"kind":"arxiv","id":"1109.1511","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.1511","created_at":"2026-05-18T04:13:55Z"},{"alias_kind":"arxiv_version","alias_value":"1109.1511v1","created_at":"2026-05-18T04:13:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.1511","created_at":"2026-05-18T04:13:55Z"},{"alias_kind":"pith_short_12","alias_value":"PIGS4IWPK6B5","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"PIGS4IWPK6B5EXYI","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"PIGS4IWP","created_at":"2026-05-18T12:26:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:PIGS4IWPK6B5EXYIPEYE4CQOGP","target":"record","payload":{"canonical_record":{"source":{"id":"1109.1511","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-09-07T16:49:41Z","cross_cats_sorted":[],"title_canon_sha256":"93a0ffe7fe3abe525d8519331081d809fbe3c1058e17305da147074f8200fff1","abstract_canon_sha256":"92e4f83337f5b5435ca88c372cee1b6ca62893c41d4e4ae7d725dbb077fc2f75"},"schema_version":"1.0"},"canonical_sha256":"7a0d2e22cf5783d25f0879304e0a0e33d83b53db2b147238d7e52f404ac77e61","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:13:55.549721Z","signature_b64":"7qD4NXqyjzFuPMcAG/3aVr2lxWUjS0VgHo7J8Dsjjm/yQgHSg5xVWBI3xClt0rAHHhJHcfxbsBnk0LK1w7vJBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7a0d2e22cf5783d25f0879304e0a0e33d83b53db2b147238d7e52f404ac77e61","last_reissued_at":"2026-05-18T04:13:55.549223Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:13:55.549223Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.1511","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":"2026-05-18T04:13:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C6Din1N2Df5pFQ7geqqs2UxFg79HIGQeDXVfX+z6Yy93ibQf3P7xuDbyzlViG9iylLAeYqZYKBSJf6wgwptLBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T08:08:23.115992Z"},"content_sha256":"19aba45cdb9ecd8f545d9b01e05aa24ea457d4ed281bbb4255c874e728834ec5","schema_version":"1.0","event_id":"sha256:19aba45cdb9ecd8f545d9b01e05aa24ea457d4ed281bbb4255c874e728834ec5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:PIGS4IWPK6B5EXYIPEYE4CQOGP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Improved Apparatus For Measuring the Growth of Ice Crystals from Water Vapor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Kenneth G. Libbrecht","submitted_at":"2011-09-07T16:49:41Z","abstract_excerpt":"We describe an apparatus designed for obtaining precise measurements of the growth rates of ice crystals from water vapor over a range of experimental conditions. Our aim is to produce clean, high-quality test crystals in a well controlled environment for investigating the detailed molecular dynamics that controls the basic physics of ice crystal growth. In this paper we describe the nucleation and initial growth of test crystals, their transport and selection into a experimental chamber, the creation of a stable and controllable supersaturation, hardware and calibration issues, and the crysta"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.1511","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":"2026-05-18T04:13:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FKA/0slZcT7Z6pxwquuUBpEaGzTSiCsDwb5hC6iKS9DflLjyL/u8cK0kufOtAlZlinaJYbqLyQRw1xH8+uzdAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T08:08:23.116356Z"},"content_sha256":"cbedad1ccf7568bcb6c290f8a5712681d5209916045ce04bfa3f093f660bff1c","schema_version":"1.0","event_id":"sha256:cbedad1ccf7568bcb6c290f8a5712681d5209916045ce04bfa3f093f660bff1c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PIGS4IWPK6B5EXYIPEYE4CQOGP/bundle.json","state_url":"https://pith.science/pith/PIGS4IWPK6B5EXYIPEYE4CQOGP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PIGS4IWPK6B5EXYIPEYE4CQOGP/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":"2026-06-24T08:08:23Z","links":{"resolver":"https://pith.science/pith/PIGS4IWPK6B5EXYIPEYE4CQOGP","bundle":"https://pith.science/pith/PIGS4IWPK6B5EXYIPEYE4CQOGP/bundle.json","state":"https://pith.science/pith/PIGS4IWPK6B5EXYIPEYE4CQOGP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PIGS4IWPK6B5EXYIPEYE4CQOGP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:PIGS4IWPK6B5EXYIPEYE4CQOGP","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":"92e4f83337f5b5435ca88c372cee1b6ca62893c41d4e4ae7d725dbb077fc2f75","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-09-07T16:49:41Z","title_canon_sha256":"93a0ffe7fe3abe525d8519331081d809fbe3c1058e17305da147074f8200fff1"},"schema_version":"1.0","source":{"id":"1109.1511","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.1511","created_at":"2026-05-18T04:13:55Z"},{"alias_kind":"arxiv_version","alias_value":"1109.1511v1","created_at":"2026-05-18T04:13:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.1511","created_at":"2026-05-18T04:13:55Z"},{"alias_kind":"pith_short_12","alias_value":"PIGS4IWPK6B5","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"PIGS4IWPK6B5EXYI","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"PIGS4IWP","created_at":"2026-05-18T12:26:39Z"}],"graph_snapshots":[{"event_id":"sha256:cbedad1ccf7568bcb6c290f8a5712681d5209916045ce04bfa3f093f660bff1c","target":"graph","created_at":"2026-05-18T04:13:55Z","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 describe an apparatus designed for obtaining precise measurements of the growth rates of ice crystals from water vapor over a range of experimental conditions. Our aim is to produce clean, high-quality test crystals in a well controlled environment for investigating the detailed molecular dynamics that controls the basic physics of ice crystal growth. In this paper we describe the nucleation and initial growth of test crystals, their transport and selection into a experimental chamber, the creation of a stable and controllable supersaturation, hardware and calibration issues, and the crysta","authors_text":"Kenneth G. Libbrecht","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-09-07T16:49:41Z","title":"An Improved Apparatus For Measuring the Growth of Ice Crystals from Water Vapor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.1511","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":"sha256:19aba45cdb9ecd8f545d9b01e05aa24ea457d4ed281bbb4255c874e728834ec5","target":"record","created_at":"2026-05-18T04:13:55Z","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":"92e4f83337f5b5435ca88c372cee1b6ca62893c41d4e4ae7d725dbb077fc2f75","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-09-07T16:49:41Z","title_canon_sha256":"93a0ffe7fe3abe525d8519331081d809fbe3c1058e17305da147074f8200fff1"},"schema_version":"1.0","source":{"id":"1109.1511","kind":"arxiv","version":1}},"canonical_sha256":"7a0d2e22cf5783d25f0879304e0a0e33d83b53db2b147238d7e52f404ac77e61","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7a0d2e22cf5783d25f0879304e0a0e33d83b53db2b147238d7e52f404ac77e61","first_computed_at":"2026-05-18T04:13:55.549223Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:13:55.549223Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7qD4NXqyjzFuPMcAG/3aVr2lxWUjS0VgHo7J8Dsjjm/yQgHSg5xVWBI3xClt0rAHHhJHcfxbsBnk0LK1w7vJBg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:13:55.549721Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.1511","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:19aba45cdb9ecd8f545d9b01e05aa24ea457d4ed281bbb4255c874e728834ec5","sha256:cbedad1ccf7568bcb6c290f8a5712681d5209916045ce04bfa3f093f660bff1c"],"state_sha256":"33aa5b8cd91a3b240dbd0c089b7dc1e52fdcc52234adf8dbcf8f7b93e58e9b1f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WlvjKvyX+V0EKIR9EO3zd2kIN2jkgsyVIxpml2zhTwq3AuWodllFA4JP6vhY6n3dPjR9+CX00blroiYVQj7+AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T08:08:23.118261Z","bundle_sha256":"72081818c8cf32e559bb7b450af5dda023c2f700d26909ef146c52db613aef4b"}}