{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:2NPD4D5V4NSTCYOQLAZN5SILIR","short_pith_number":"pith:2NPD4D5V","canonical_record":{"source":{"id":"1507.01043","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-07-03T22:22:51Z","cross_cats_sorted":[],"title_canon_sha256":"54c06bdd708a0978a251ed5471953f90ca148c605c576a70896d83ab3e50306b","abstract_canon_sha256":"0a6504cd7b821b6297023067435ef3e3db4caaab74731da4a09517f16fcae13b"},"schema_version":"1.0"},"canonical_sha256":"d35e3e0fb5e3653161d05832dec90b4475cf25147810f1d974b04036af6cbff1","source":{"kind":"arxiv","id":"1507.01043","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.01043","created_at":"2026-05-18T01:21:37Z"},{"alias_kind":"arxiv_version","alias_value":"1507.01043v1","created_at":"2026-05-18T01:21:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.01043","created_at":"2026-05-18T01:21:37Z"},{"alias_kind":"pith_short_12","alias_value":"2NPD4D5V4NST","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"2NPD4D5V4NSTCYOQ","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"2NPD4D5V","created_at":"2026-05-18T12:29:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:2NPD4D5V4NSTCYOQLAZN5SILIR","target":"record","payload":{"canonical_record":{"source":{"id":"1507.01043","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-07-03T22:22:51Z","cross_cats_sorted":[],"title_canon_sha256":"54c06bdd708a0978a251ed5471953f90ca148c605c576a70896d83ab3e50306b","abstract_canon_sha256":"0a6504cd7b821b6297023067435ef3e3db4caaab74731da4a09517f16fcae13b"},"schema_version":"1.0"},"canonical_sha256":"d35e3e0fb5e3653161d05832dec90b4475cf25147810f1d974b04036af6cbff1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:37.325274Z","signature_b64":"HD9AEfT0mlkGVlWU+T3NyMR7lf2cufafekf57bLufskD6TMpy87ZMPfOgMxM3H2zeR9HURM3C1lgn+q7Y2MDCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d35e3e0fb5e3653161d05832dec90b4475cf25147810f1d974b04036af6cbff1","last_reissued_at":"2026-05-18T01:21:37.324592Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:37.324592Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.01043","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":"2026-05-18T01:21:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7nBI6hQkfFTxJtLXIt4MqO5CkIer8QsE+lWXEFQCUmtKxjXau9uBMjyk9lVEOrzJbZrxAy4XqPA/CyjtabNUDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T01:15:08.729759Z"},"content_sha256":"e3b36ed8b91cc999a8336cb6e08d319cf16beaffd483b9f56090b7d2475b353d","schema_version":"1.0","event_id":"sha256:e3b36ed8b91cc999a8336cb6e08d319cf16beaffd483b9f56090b7d2475b353d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:2NPD4D5V4NSTCYOQLAZN5SILIR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Forces acting on a small particle in an acoustical field in a thermoviscous fluid","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Henrik Bruus, Jonas Tobias Karlsen","submitted_at":"2015-07-03T22:22:51Z","abstract_excerpt":"We present a theoretical analysis of the acoustic radiation force on a single small particle, either a thermoviscous fluid droplet or a thermoelastic solid particle, suspended in a viscous and heat-conducting fluid medium. Our analysis places no restrictions on the length scales of the viscous and thermal boundary layer thicknesses $\\delta_\\mathrm{s}$ and $\\delta_\\mathrm{t}$ relative to the particle radius $a$, but it assumes the particle to be small in comparison to the acoustic wavelength $\\lambda$. This is the limit relevant to scattering of sound and ultrasound waves from micrometer-sized "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.01043","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":"2026-05-18T01:21:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QpgeAe8b3V6gdoHZTIWswBC8vvaKNrltLW2rtC1HiqV1Kaoat+4CEzETjZ31WiwOC8HXe/Xmoyj60V5QrHcuCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T01:15:08.730498Z"},"content_sha256":"99875ac80d0d2ff5a4f3a15729e3a3f2a4e3d10f6c7b547834095a436fdc6d24","schema_version":"1.0","event_id":"sha256:99875ac80d0d2ff5a4f3a15729e3a3f2a4e3d10f6c7b547834095a436fdc6d24"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2NPD4D5V4NSTCYOQLAZN5SILIR/bundle.json","state_url":"https://pith.science/pith/2NPD4D5V4NSTCYOQLAZN5SILIR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2NPD4D5V4NSTCYOQLAZN5SILIR/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":"2026-06-10T01:15:08Z","links":{"resolver":"https://pith.science/pith/2NPD4D5V4NSTCYOQLAZN5SILIR","bundle":"https://pith.science/pith/2NPD4D5V4NSTCYOQLAZN5SILIR/bundle.json","state":"https://pith.science/pith/2NPD4D5V4NSTCYOQLAZN5SILIR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2NPD4D5V4NSTCYOQLAZN5SILIR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:2NPD4D5V4NSTCYOQLAZN5SILIR","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":"0a6504cd7b821b6297023067435ef3e3db4caaab74731da4a09517f16fcae13b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-07-03T22:22:51Z","title_canon_sha256":"54c06bdd708a0978a251ed5471953f90ca148c605c576a70896d83ab3e50306b"},"schema_version":"1.0","source":{"id":"1507.01043","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.01043","created_at":"2026-05-18T01:21:37Z"},{"alias_kind":"arxiv_version","alias_value":"1507.01043v1","created_at":"2026-05-18T01:21:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.01043","created_at":"2026-05-18T01:21:37Z"},{"alias_kind":"pith_short_12","alias_value":"2NPD4D5V4NST","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"2NPD4D5V4NSTCYOQ","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"2NPD4D5V","created_at":"2026-05-18T12:29:02Z"}],"graph_snapshots":[{"event_id":"sha256:99875ac80d0d2ff5a4f3a15729e3a3f2a4e3d10f6c7b547834095a436fdc6d24","target":"graph","created_at":"2026-05-18T01:21:37Z","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 present a theoretical analysis of the acoustic radiation force on a single small particle, either a thermoviscous fluid droplet or a thermoelastic solid particle, suspended in a viscous and heat-conducting fluid medium. Our analysis places no restrictions on the length scales of the viscous and thermal boundary layer thicknesses $\\delta_\\mathrm{s}$ and $\\delta_\\mathrm{t}$ relative to the particle radius $a$, but it assumes the particle to be small in comparison to the acoustic wavelength $\\lambda$. This is the limit relevant to scattering of sound and ultrasound waves from micrometer-sized ","authors_text":"Henrik Bruus, Jonas Tobias Karlsen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-07-03T22:22:51Z","title":"Forces acting on a small particle in an acoustical field in a thermoviscous fluid"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.01043","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:e3b36ed8b91cc999a8336cb6e08d319cf16beaffd483b9f56090b7d2475b353d","target":"record","created_at":"2026-05-18T01:21:37Z","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":"0a6504cd7b821b6297023067435ef3e3db4caaab74731da4a09517f16fcae13b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-07-03T22:22:51Z","title_canon_sha256":"54c06bdd708a0978a251ed5471953f90ca148c605c576a70896d83ab3e50306b"},"schema_version":"1.0","source":{"id":"1507.01043","kind":"arxiv","version":1}},"canonical_sha256":"d35e3e0fb5e3653161d05832dec90b4475cf25147810f1d974b04036af6cbff1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d35e3e0fb5e3653161d05832dec90b4475cf25147810f1d974b04036af6cbff1","first_computed_at":"2026-05-18T01:21:37.324592Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:21:37.324592Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HD9AEfT0mlkGVlWU+T3NyMR7lf2cufafekf57bLufskD6TMpy87ZMPfOgMxM3H2zeR9HURM3C1lgn+q7Y2MDCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:21:37.325274Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.01043","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e3b36ed8b91cc999a8336cb6e08d319cf16beaffd483b9f56090b7d2475b353d","sha256:99875ac80d0d2ff5a4f3a15729e3a3f2a4e3d10f6c7b547834095a436fdc6d24"],"state_sha256":"7cb7634364410af37f95365e88fa2c5f4bfc8c86540b1cc6f149a355b0a17f90"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BRMoDkkvjkbGH8VRrQgbR0JWex5MKQyMfRNjERZH/0didHQavVgDm1gE/HTIbxUbicYCS+i37aF7ytImlbq7DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T01:15:08.734756Z","bundle_sha256":"f4a029f87e941a0d1e84f5c8602a4b289fba82b69c9bc4f611d34f0420d25bb3"}}