{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:J4RJLYACE3PBCAYQT3JACJD76Z","short_pith_number":"pith:J4RJLYAC","canonical_record":{"source":{"id":"0911.2726","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2009-11-13T23:04:44Z","cross_cats_sorted":[],"title_canon_sha256":"d8d9b89f46483a9f7d0febaadc3c31324c38d4dfff09c6d8e34de79bd8736ca4","abstract_canon_sha256":"73e68b38e5a9ffcb0fd26dc1b1cef4ec131e18f67255bebf88405273208a1223"},"schema_version":"1.0"},"canonical_sha256":"4f2295e00226de1103109ed201247ff65ceaa6ce218cb3b8491366985c3dde6b","source":{"kind":"arxiv","id":"0911.2726","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.2726","created_at":"2026-07-04T17:15:52Z"},{"alias_kind":"arxiv_version","alias_value":"0911.2726v1","created_at":"2026-07-04T17:15:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.2726","created_at":"2026-07-04T17:15:52Z"},{"alias_kind":"pith_short_12","alias_value":"J4RJLYACE3PB","created_at":"2026-07-04T17:15:52Z"},{"alias_kind":"pith_short_16","alias_value":"J4RJLYACE3PBCAYQ","created_at":"2026-07-04T17:15:52Z"},{"alias_kind":"pith_short_8","alias_value":"J4RJLYAC","created_at":"2026-07-04T17:15:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:J4RJLYACE3PBCAYQT3JACJD76Z","target":"record","payload":{"canonical_record":{"source":{"id":"0911.2726","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2009-11-13T23:04:44Z","cross_cats_sorted":[],"title_canon_sha256":"d8d9b89f46483a9f7d0febaadc3c31324c38d4dfff09c6d8e34de79bd8736ca4","abstract_canon_sha256":"73e68b38e5a9ffcb0fd26dc1b1cef4ec131e18f67255bebf88405273208a1223"},"schema_version":"1.0"},"canonical_sha256":"4f2295e00226de1103109ed201247ff65ceaa6ce218cb3b8491366985c3dde6b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:15:52.907397Z","signature_b64":"WmHSdRJZFU0DRsFm4bO6ub1S1I63uJ99e1tZQIxdlUSKniwu7cw9K1Y3DYiPyMu4KHxoh3/ZrHTVo4c4o1WyBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4f2295e00226de1103109ed201247ff65ceaa6ce218cb3b8491366985c3dde6b","last_reissued_at":"2026-07-04T17:15:52.906989Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:15:52.906989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0911.2726","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":"2026-07-04T17:15:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A1VF77AEK6+DXvYRiMzgv3wsExhluest5gq/vlZv0bNicNt7+uGJHgoJSb54pXnFbZ8v9BpBDt2+teae+hA5Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T04:39:38.286680Z"},"content_sha256":"250b01d055bb3a13a146356628140e521a4faeac25eb5f4111ab232b2f5157d1","schema_version":"1.0","event_id":"sha256:250b01d055bb3a13a146356628140e521a4faeac25eb5f4111ab232b2f5157d1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:J4RJLYACE3PBCAYQT3JACJD76Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nanotechnology as a Field of Science: Its Delineation in terms of Journals and Patents","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.soc-ph","authors_text":"Loet Leydesdorff, Ping Zhou","submitted_at":"2009-11-13T23:04:44Z","abstract_excerpt":"The Journal Citation Reports of the Science Citation Index 2004 were used to delineate a core set of nanotechnology journals and a nanotechnology-relevant set. In comparison with 2003, the core set has grown and the relevant set has decreased. This suggests a higher degree of codification in the field of nanotechnology: the field has become more focused in terms of citation practices. Using the citing patterns among journals at the aggregate level, a core group of ten nanotechnology journals in the vector space can be delineated on the criterion of betweenness centrality. National contribution"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.2726","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0911.2726/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T17:15:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dgcfoXZBu+ADIlkhpw6uQU5MtmnqfF2yEny67nPHTtHbI6O3y6ycdH9GwDyHZ0/js2/i1x8e1Ji7K51Wipt1Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T04:39:38.287190Z"},"content_sha256":"81ed29a0e74dee968439090db75b7e33e815d62a74ae6c3029c7c773acf06ea8","schema_version":"1.0","event_id":"sha256:81ed29a0e74dee968439090db75b7e33e815d62a74ae6c3029c7c773acf06ea8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/J4RJLYACE3PBCAYQT3JACJD76Z/bundle.json","state_url":"https://pith.science/pith/J4RJLYACE3PBCAYQT3JACJD76Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/J4RJLYACE3PBCAYQT3JACJD76Z/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":"2026-08-12T04:39:38Z","links":{"resolver":"https://pith.science/pith/J4RJLYACE3PBCAYQT3JACJD76Z","bundle":"https://pith.science/pith/J4RJLYACE3PBCAYQT3JACJD76Z/bundle.json","state":"https://pith.science/pith/J4RJLYACE3PBCAYQT3JACJD76Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/J4RJLYACE3PBCAYQT3JACJD76Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:J4RJLYACE3PBCAYQT3JACJD76Z","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":"73e68b38e5a9ffcb0fd26dc1b1cef4ec131e18f67255bebf88405273208a1223","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2009-11-13T23:04:44Z","title_canon_sha256":"d8d9b89f46483a9f7d0febaadc3c31324c38d4dfff09c6d8e34de79bd8736ca4"},"schema_version":"1.0","source":{"id":"0911.2726","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.2726","created_at":"2026-07-04T17:15:52Z"},{"alias_kind":"arxiv_version","alias_value":"0911.2726v1","created_at":"2026-07-04T17:15:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.2726","created_at":"2026-07-04T17:15:52Z"},{"alias_kind":"pith_short_12","alias_value":"J4RJLYACE3PB","created_at":"2026-07-04T17:15:52Z"},{"alias_kind":"pith_short_16","alias_value":"J4RJLYACE3PBCAYQ","created_at":"2026-07-04T17:15:52Z"},{"alias_kind":"pith_short_8","alias_value":"J4RJLYAC","created_at":"2026-07-04T17:15:52Z"}],"graph_snapshots":[{"event_id":"sha256:81ed29a0e74dee968439090db75b7e33e815d62a74ae6c3029c7c773acf06ea8","target":"graph","created_at":"2026-07-04T17:15:52Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0911.2726/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Journal Citation Reports of the Science Citation Index 2004 were used to delineate a core set of nanotechnology journals and a nanotechnology-relevant set. In comparison with 2003, the core set has grown and the relevant set has decreased. This suggests a higher degree of codification in the field of nanotechnology: the field has become more focused in terms of citation practices. Using the citing patterns among journals at the aggregate level, a core group of ten nanotechnology journals in the vector space can be delineated on the criterion of betweenness centrality. National contribution","authors_text":"Loet Leydesdorff, Ping Zhou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2009-11-13T23:04:44Z","title":"Nanotechnology as a Field of Science: Its Delineation in terms of Journals and Patents"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.2726","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":"sha256:250b01d055bb3a13a146356628140e521a4faeac25eb5f4111ab232b2f5157d1","target":"record","created_at":"2026-07-04T17:15:52Z","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":"73e68b38e5a9ffcb0fd26dc1b1cef4ec131e18f67255bebf88405273208a1223","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2009-11-13T23:04:44Z","title_canon_sha256":"d8d9b89f46483a9f7d0febaadc3c31324c38d4dfff09c6d8e34de79bd8736ca4"},"schema_version":"1.0","source":{"id":"0911.2726","kind":"arxiv","version":1}},"canonical_sha256":"4f2295e00226de1103109ed201247ff65ceaa6ce218cb3b8491366985c3dde6b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4f2295e00226de1103109ed201247ff65ceaa6ce218cb3b8491366985c3dde6b","first_computed_at":"2026-07-04T17:15:52.906989Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:15:52.906989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WmHSdRJZFU0DRsFm4bO6ub1S1I63uJ99e1tZQIxdlUSKniwu7cw9K1Y3DYiPyMu4KHxoh3/ZrHTVo4c4o1WyBA==","signature_status":"signed_v1","signed_at":"2026-07-04T17:15:52.907397Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.2726","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:250b01d055bb3a13a146356628140e521a4faeac25eb5f4111ab232b2f5157d1","sha256:81ed29a0e74dee968439090db75b7e33e815d62a74ae6c3029c7c773acf06ea8"],"state_sha256":"1ae3e7955ed9c9acb1d693e22d13663482bb75fa8efae565fb75140b8c1e02b3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ntrmLi8bB2fupVdpfOzZVz90n3sD+0KP43s478GkkJAc1LaNOhoc4TqVgwOLviNdH3IPWk3IwX02NYlNFyYJDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T04:39:38.291991Z","bundle_sha256":"6a17cb9182d6a0d7a87d93ace769216780c9db73f6a063a3679031a784c168eb"}}