{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:4NWT4SX6VJOB2XDCK2IG4W5PTG","short_pith_number":"pith:4NWT4SX6","canonical_record":{"source":{"id":"1610.04380","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2016-10-14T09:18:54Z","cross_cats_sorted":[],"title_canon_sha256":"705a4cee3105b8b187b3d428f74215c1f06b0a459d79cc8f9e980d625c6af3f6","abstract_canon_sha256":"65d171e9c1fe469e4b05caed25484f6eaa38f99741973dd257b45519ccf884c5"},"schema_version":"1.0"},"canonical_sha256":"e36d3e4afeaa5c1d5c6256906e5baf99b7974d5a3d061000cad3309761ac86f3","source":{"kind":"arxiv","id":"1610.04380","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.04380","created_at":"2026-05-18T01:00:33Z"},{"alias_kind":"arxiv_version","alias_value":"1610.04380v1","created_at":"2026-05-18T01:00:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.04380","created_at":"2026-05-18T01:00:33Z"},{"alias_kind":"pith_short_12","alias_value":"4NWT4SX6VJOB","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_16","alias_value":"4NWT4SX6VJOB2XDC","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_8","alias_value":"4NWT4SX6","created_at":"2026-05-18T12:29:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:4NWT4SX6VJOB2XDCK2IG4W5PTG","target":"record","payload":{"canonical_record":{"source":{"id":"1610.04380","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2016-10-14T09:18:54Z","cross_cats_sorted":[],"title_canon_sha256":"705a4cee3105b8b187b3d428f74215c1f06b0a459d79cc8f9e980d625c6af3f6","abstract_canon_sha256":"65d171e9c1fe469e4b05caed25484f6eaa38f99741973dd257b45519ccf884c5"},"schema_version":"1.0"},"canonical_sha256":"e36d3e4afeaa5c1d5c6256906e5baf99b7974d5a3d061000cad3309761ac86f3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:00:33.252700Z","signature_b64":"rjaqVYBXuR3fCWwltqWKuyM8NDso2bvwVVErbwXmVs20QICZPWjWs7c73L8BdT/RbHsY7dNhp/Zuenx12ppvCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e36d3e4afeaa5c1d5c6256906e5baf99b7974d5a3d061000cad3309761ac86f3","last_reissued_at":"2026-05-18T01:00:33.252177Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:00:33.252177Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1610.04380","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":"2026-05-18T01:00:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xgfEKaiebjh4ENPBEuMkDuc02U9PmuWRhuyvnef4njtU9F+DgZ9o6vyOwtG3FdCU+8O/6DcqeQYugyTYcjXdAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:58:59.116986Z"},"content_sha256":"d2f127e75bb5f74f583c939d700b8ef1030ac29721d817f8a6eb88e8cc7b86d5","schema_version":"1.0","event_id":"sha256:d2f127e75bb5f74f583c939d700b8ef1030ac29721d817f8a6eb88e8cc7b86d5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:4NWT4SX6VJOB2XDCK2IG4W5PTG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bidirectional particle transport and size selective sorting of Brownian particles in a flashing spatially periodic energy landscape","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Arthur V. Straube, Fernando Martinez-Pedrero, Helena Massana-Cid, Pietro Tierno, Till Ziegler, Tom H. Johansen","submitted_at":"2016-10-14T09:18:54Z","abstract_excerpt":"We demonstrate a size sensitive experimental scheme which enables bidirectional transport and fractionation of paramagnetic colloids in a fluid medium. It is shown that two types of magnetic colloidal particles with different sizes can be simultaneously transported in opposite directions, when deposited above a stripe-patterned ferrite garnet film subjected to a square-wave magnetic modulation. Due to their different sizes, the particles are located at distinct elevations above the surface, and they experience two different energy landscapes, generated by the modulated magnetic substrate. By c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.04380","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":"2026-05-18T01:00:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kADD6+AUHQMDZ7BYc0wUO4bN4UKqpoXaZQEMmbciNi1MQjGiMVl3JFiIDkbq/A3GYtbdTwnyl8uqkpWsMtABAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:58:59.117866Z"},"content_sha256":"9bd56d4922abcb3a76ba19e46ecb5110d7c272d396eedc25c06f83869eb912d6","schema_version":"1.0","event_id":"sha256:9bd56d4922abcb3a76ba19e46ecb5110d7c272d396eedc25c06f83869eb912d6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4NWT4SX6VJOB2XDCK2IG4W5PTG/bundle.json","state_url":"https://pith.science/pith/4NWT4SX6VJOB2XDCK2IG4W5PTG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4NWT4SX6VJOB2XDCK2IG4W5PTG/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":"2026-05-31T10:58:59Z","links":{"resolver":"https://pith.science/pith/4NWT4SX6VJOB2XDCK2IG4W5PTG","bundle":"https://pith.science/pith/4NWT4SX6VJOB2XDCK2IG4W5PTG/bundle.json","state":"https://pith.science/pith/4NWT4SX6VJOB2XDCK2IG4W5PTG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4NWT4SX6VJOB2XDCK2IG4W5PTG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:4NWT4SX6VJOB2XDCK2IG4W5PTG","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":"65d171e9c1fe469e4b05caed25484f6eaa38f99741973dd257b45519ccf884c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2016-10-14T09:18:54Z","title_canon_sha256":"705a4cee3105b8b187b3d428f74215c1f06b0a459d79cc8f9e980d625c6af3f6"},"schema_version":"1.0","source":{"id":"1610.04380","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.04380","created_at":"2026-05-18T01:00:33Z"},{"alias_kind":"arxiv_version","alias_value":"1610.04380v1","created_at":"2026-05-18T01:00:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.04380","created_at":"2026-05-18T01:00:33Z"},{"alias_kind":"pith_short_12","alias_value":"4NWT4SX6VJOB","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_16","alias_value":"4NWT4SX6VJOB2XDC","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_8","alias_value":"4NWT4SX6","created_at":"2026-05-18T12:29:58Z"}],"graph_snapshots":[{"event_id":"sha256:9bd56d4922abcb3a76ba19e46ecb5110d7c272d396eedc25c06f83869eb912d6","target":"graph","created_at":"2026-05-18T01:00:33Z","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 demonstrate a size sensitive experimental scheme which enables bidirectional transport and fractionation of paramagnetic colloids in a fluid medium. It is shown that two types of magnetic colloidal particles with different sizes can be simultaneously transported in opposite directions, when deposited above a stripe-patterned ferrite garnet film subjected to a square-wave magnetic modulation. Due to their different sizes, the particles are located at distinct elevations above the surface, and they experience two different energy landscapes, generated by the modulated magnetic substrate. By c","authors_text":"Arthur V. Straube, Fernando Martinez-Pedrero, Helena Massana-Cid, Pietro Tierno, Till Ziegler, Tom H. Johansen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2016-10-14T09:18:54Z","title":"Bidirectional particle transport and size selective sorting of Brownian particles in a flashing spatially periodic energy landscape"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.04380","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:d2f127e75bb5f74f583c939d700b8ef1030ac29721d817f8a6eb88e8cc7b86d5","target":"record","created_at":"2026-05-18T01:00:33Z","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":"65d171e9c1fe469e4b05caed25484f6eaa38f99741973dd257b45519ccf884c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2016-10-14T09:18:54Z","title_canon_sha256":"705a4cee3105b8b187b3d428f74215c1f06b0a459d79cc8f9e980d625c6af3f6"},"schema_version":"1.0","source":{"id":"1610.04380","kind":"arxiv","version":1}},"canonical_sha256":"e36d3e4afeaa5c1d5c6256906e5baf99b7974d5a3d061000cad3309761ac86f3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e36d3e4afeaa5c1d5c6256906e5baf99b7974d5a3d061000cad3309761ac86f3","first_computed_at":"2026-05-18T01:00:33.252177Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:00:33.252177Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rjaqVYBXuR3fCWwltqWKuyM8NDso2bvwVVErbwXmVs20QICZPWjWs7c73L8BdT/RbHsY7dNhp/Zuenx12ppvCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:00:33.252700Z","signed_message":"canonical_sha256_bytes"},"source_id":"1610.04380","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d2f127e75bb5f74f583c939d700b8ef1030ac29721d817f8a6eb88e8cc7b86d5","sha256:9bd56d4922abcb3a76ba19e46ecb5110d7c272d396eedc25c06f83869eb912d6"],"state_sha256":"cd8b9ad17cf7c0219a84818d7b3408e263b0a9e259ce02635ad75c156bb11ed2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D5aPqatSRQLGoBf2VYro2w4yEZCnou9ewXTGM8rP4/Aq8GUh0WIPkN1Men01X6SOeb3zicAX52sySGcW8EwZCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T10:58:59.122511Z","bundle_sha256":"a1516e7ed1602e13679a097ccf95edf2954e8303ff11b65ab68591e3c7ea747c"}}