{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:VZAY6AY5D4SCRLR4YFGBKM574N","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":"7a286643844f7191d65b4d4015405458353b9024f24976fbf741fca91c834075","cross_cats_sorted":["cond-mat.soft","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-04-26T22:36:45Z","title_canon_sha256":"fbf057a36b1c115d3ccbdf1cf638fe52156ba6477dfa38dacaea907c0e0a3792"},"schema_version":"1.0","source":{"id":"1504.07602","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.07602","created_at":"2026-05-18T01:30:34Z"},{"alias_kind":"arxiv_version","alias_value":"1504.07602v2","created_at":"2026-05-18T01:30:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.07602","created_at":"2026-05-18T01:30:34Z"},{"alias_kind":"pith_short_12","alias_value":"VZAY6AY5D4SC","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"VZAY6AY5D4SCRLR4","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"VZAY6AY5","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:ebef884c3f06006efc2f4d97aef710b49a945e85faf2f77e02e073d54ed8f31b","target":"graph","created_at":"2026-05-18T01:30:34Z","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":"In this paper, we have studied polystyrene (PS) and polyethylene (PE) stiffness by 3-dimensional Langevin Molecular Dynamics simulation. Hard polymers have a very small bending, and thus, their end-to-end distance is more than soft polymers. Quantum dot lasers can be established as colloidal particles dipped in a liquid and grafted by polymer brushes to maintain the solution. Here by a study on molecular structures of PS and PE, we show that the principle reason lies on large phenyl groups around the backbone carbons of PS, rather than a PE with Hydrogen atoms. Our results show that the mean r","authors_text":"Mahdi Ahmadi Borji","cross_cats":["cond-mat.soft","physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-04-26T22:36:45Z","title":"Molecular Dynamics Study of Stiffness in Polystyrene and Polyethylene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.07602","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":"sha256:17077527a17ee69e9c43c7fd261928e73aeefebe5eade20d9b9e92609105df43","target":"record","created_at":"2026-05-18T01:30:34Z","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":"7a286643844f7191d65b4d4015405458353b9024f24976fbf741fca91c834075","cross_cats_sorted":["cond-mat.soft","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-04-26T22:36:45Z","title_canon_sha256":"fbf057a36b1c115d3ccbdf1cf638fe52156ba6477dfa38dacaea907c0e0a3792"},"schema_version":"1.0","source":{"id":"1504.07602","kind":"arxiv","version":2}},"canonical_sha256":"ae418f031d1f2428ae3cc14c1533bfe366e5cfcdc05306c4717d40b9b9eff099","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ae418f031d1f2428ae3cc14c1533bfe366e5cfcdc05306c4717d40b9b9eff099","first_computed_at":"2026-05-18T01:30:34.664135Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:30:34.664135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yG/7wOm0sOPdYQdhekMo5Y6+pKu2ofqp8heQk1b+YBZ1qQRtV/UK7NJccWdlvkmEp/qoP+VqaQvRsrXdffAPAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:30:34.664870Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.07602","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17077527a17ee69e9c43c7fd261928e73aeefebe5eade20d9b9e92609105df43","sha256:ebef884c3f06006efc2f4d97aef710b49a945e85faf2f77e02e073d54ed8f31b"],"state_sha256":"fa2e0076c4bb0b5a8387b06706536c02cc3856d30263770a71a7015a5b2ebdf9"}