{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:GIAL6SIXCHW7AOIWOC5IE5LWB3","short_pith_number":"pith:GIAL6SIX","canonical_record":{"source":{"id":"1504.04297","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2015-04-16T16:36:14Z","cross_cats_sorted":[],"title_canon_sha256":"8b9015e4586165de3532f42413830975e638121e78e084f78295daff211afd2c","abstract_canon_sha256":"7e1b8865ae650ef82375763324ff8b9ded44e0fe901806b7433ac7c9b5202e7d"},"schema_version":"1.0"},"canonical_sha256":"3200bf491711edf0391670ba8275760ec3f858aadb163141500fb11ffde8a516","source":{"kind":"arxiv","id":"1504.04297","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.04297","created_at":"2026-05-18T02:18:33Z"},{"alias_kind":"arxiv_version","alias_value":"1504.04297v1","created_at":"2026-05-18T02:18:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.04297","created_at":"2026-05-18T02:18:33Z"},{"alias_kind":"pith_short_12","alias_value":"GIAL6SIXCHW7","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GIAL6SIXCHW7AOIW","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GIAL6SIX","created_at":"2026-05-18T12:29:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:GIAL6SIXCHW7AOIWOC5IE5LWB3","target":"record","payload":{"canonical_record":{"source":{"id":"1504.04297","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2015-04-16T16:36:14Z","cross_cats_sorted":[],"title_canon_sha256":"8b9015e4586165de3532f42413830975e638121e78e084f78295daff211afd2c","abstract_canon_sha256":"7e1b8865ae650ef82375763324ff8b9ded44e0fe901806b7433ac7c9b5202e7d"},"schema_version":"1.0"},"canonical_sha256":"3200bf491711edf0391670ba8275760ec3f858aadb163141500fb11ffde8a516","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:18:33.521164Z","signature_b64":"MqOhFtvuCur6kHl/JqWSsMpRbFFtkjmXLfPdYG/76Fc6c+0wKrWsaakJhJ6nE3YUHnvurGhU6VyIz4Tx+sc5Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3200bf491711edf0391670ba8275760ec3f858aadb163141500fb11ffde8a516","last_reissued_at":"2026-05-18T02:18:33.520778Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:18:33.520778Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.04297","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":"2026-05-18T02:18:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bVFbZvHMxIqwE02Ui2ixPBexQMykTinQAYouUsVL5MncSG1oTTpPu5JANnGzQLTOHi+7g3Hm92Jf21RPMQHbBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T22:35:46.518349Z"},"content_sha256":"9816ced0e868f47e66cd4e581db361a6a9eec072944fb01f59586d869b063929","schema_version":"1.0","event_id":"sha256:9816ced0e868f47e66cd4e581db361a6a9eec072944fb01f59586d869b063929"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:GIAL6SIXCHW7AOIWOC5IE5LWB3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"MigrantStore: Leveraging Virtual Memory in DRAM-PCM Memory Architecture","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.AR","authors_text":"Balajee Vamanan, Hamza Bin Sohail, T. N. Vijaykumar","submitted_at":"2015-04-16T16:36:14Z","abstract_excerpt":"With the imminent slowing down of DRAM scaling, Phase Change Memory (PCM) is emerging as a lead alternative for main memory technology. While PCM achieves low energy due to various technology-specific advantages, PCM is significantly slower than DRAM (especially for writes) and can endure far fewer writes before wearing out. Previous work has proposed to use a large, DRAM-based hardware cache to absorb writes and provide faster access. However, due to ineffectual caching where blocks are evicted before sufficient number of accesses, hardware caches incur significant overheads in energy and ban"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.04297","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":"2026-05-18T02:18:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ks+z/1NFJoOUr7YcqVYI0ibcSz4SeV45LG1c85sfselO7C02dFVJM7ET0f89kpNtjkPPBD0VbqkSa0lZSu+jDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T22:35:46.518685Z"},"content_sha256":"6e8805d6f84638a05414b69d6c389684317e5e19e367cbbf36b4ce89054e2611","schema_version":"1.0","event_id":"sha256:6e8805d6f84638a05414b69d6c389684317e5e19e367cbbf36b4ce89054e2611"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GIAL6SIXCHW7AOIWOC5IE5LWB3/bundle.json","state_url":"https://pith.science/pith/GIAL6SIXCHW7AOIWOC5IE5LWB3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GIAL6SIXCHW7AOIWOC5IE5LWB3/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":"2026-06-26T22:35:46Z","links":{"resolver":"https://pith.science/pith/GIAL6SIXCHW7AOIWOC5IE5LWB3","bundle":"https://pith.science/pith/GIAL6SIXCHW7AOIWOC5IE5LWB3/bundle.json","state":"https://pith.science/pith/GIAL6SIXCHW7AOIWOC5IE5LWB3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GIAL6SIXCHW7AOIWOC5IE5LWB3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:GIAL6SIXCHW7AOIWOC5IE5LWB3","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":"7e1b8865ae650ef82375763324ff8b9ded44e0fe901806b7433ac7c9b5202e7d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2015-04-16T16:36:14Z","title_canon_sha256":"8b9015e4586165de3532f42413830975e638121e78e084f78295daff211afd2c"},"schema_version":"1.0","source":{"id":"1504.04297","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.04297","created_at":"2026-05-18T02:18:33Z"},{"alias_kind":"arxiv_version","alias_value":"1504.04297v1","created_at":"2026-05-18T02:18:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.04297","created_at":"2026-05-18T02:18:33Z"},{"alias_kind":"pith_short_12","alias_value":"GIAL6SIXCHW7","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GIAL6SIXCHW7AOIW","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GIAL6SIX","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:6e8805d6f84638a05414b69d6c389684317e5e19e367cbbf36b4ce89054e2611","target":"graph","created_at":"2026-05-18T02:18:33Z","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":"With the imminent slowing down of DRAM scaling, Phase Change Memory (PCM) is emerging as a lead alternative for main memory technology. While PCM achieves low energy due to various technology-specific advantages, PCM is significantly slower than DRAM (especially for writes) and can endure far fewer writes before wearing out. Previous work has proposed to use a large, DRAM-based hardware cache to absorb writes and provide faster access. However, due to ineffectual caching where blocks are evicted before sufficient number of accesses, hardware caches incur significant overheads in energy and ban","authors_text":"Balajee Vamanan, Hamza Bin Sohail, T. N. Vijaykumar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2015-04-16T16:36:14Z","title":"MigrantStore: Leveraging Virtual Memory in DRAM-PCM Memory Architecture"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.04297","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":"sha256:9816ced0e868f47e66cd4e581db361a6a9eec072944fb01f59586d869b063929","target":"record","created_at":"2026-05-18T02:18:33Z","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":"7e1b8865ae650ef82375763324ff8b9ded44e0fe901806b7433ac7c9b5202e7d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2015-04-16T16:36:14Z","title_canon_sha256":"8b9015e4586165de3532f42413830975e638121e78e084f78295daff211afd2c"},"schema_version":"1.0","source":{"id":"1504.04297","kind":"arxiv","version":1}},"canonical_sha256":"3200bf491711edf0391670ba8275760ec3f858aadb163141500fb11ffde8a516","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3200bf491711edf0391670ba8275760ec3f858aadb163141500fb11ffde8a516","first_computed_at":"2026-05-18T02:18:33.520778Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:18:33.520778Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MqOhFtvuCur6kHl/JqWSsMpRbFFtkjmXLfPdYG/76Fc6c+0wKrWsaakJhJ6nE3YUHnvurGhU6VyIz4Tx+sc5Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:18:33.521164Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.04297","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9816ced0e868f47e66cd4e581db361a6a9eec072944fb01f59586d869b063929","sha256:6e8805d6f84638a05414b69d6c389684317e5e19e367cbbf36b4ce89054e2611"],"state_sha256":"a25a28235f1c887679464fb8d3e0d4895c736b974c9c326ffc76b093f8fed82b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1kmau9Fau+6oHSUJTMrUq/xLTjFJoSCSRON7fqqiWxlr2if5u0swtgmeXa3J94Bg/Gl1+/23I2xT53z4GarLBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T22:35:46.520477Z","bundle_sha256":"c54b3ce56c5853a8d7927fe5188d00a8a405b484f164608b31d16acf6c4f18c5"}}