{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:FYDLGFG52SY3AYJXZZPDHNH7NC","short_pith_number":"pith:FYDLGFG5","canonical_record":{"source":{"id":"1502.07026","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2015-02-25T01:30:31Z","cross_cats_sorted":[],"title_canon_sha256":"9e5e4429abbfd08b71875329ee596a75664cd6dd1827355eede6c338abd82620","abstract_canon_sha256":"db27a29693192bcfeb9641c86515572cfda5aaa957efa554a9cfbecddcade24e"},"schema_version":"1.0"},"canonical_sha256":"2e06b314ddd4b1b06137ce5e33b4ff68b2168225e84a05a7efd92b53df0e7015","source":{"kind":"arxiv","id":"1502.07026","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.07026","created_at":"2026-05-18T02:26:12Z"},{"alias_kind":"arxiv_version","alias_value":"1502.07026v1","created_at":"2026-05-18T02:26:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.07026","created_at":"2026-05-18T02:26:12Z"},{"alias_kind":"pith_short_12","alias_value":"FYDLGFG52SY3","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"FYDLGFG52SY3AYJX","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"FYDLGFG5","created_at":"2026-05-18T12:29:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:FYDLGFG52SY3AYJXZZPDHNH7NC","target":"record","payload":{"canonical_record":{"source":{"id":"1502.07026","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2015-02-25T01:30:31Z","cross_cats_sorted":[],"title_canon_sha256":"9e5e4429abbfd08b71875329ee596a75664cd6dd1827355eede6c338abd82620","abstract_canon_sha256":"db27a29693192bcfeb9641c86515572cfda5aaa957efa554a9cfbecddcade24e"},"schema_version":"1.0"},"canonical_sha256":"2e06b314ddd4b1b06137ce5e33b4ff68b2168225e84a05a7efd92b53df0e7015","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:26:12.092537Z","signature_b64":"jVxjfqv3peZ6BUjKLHxJhMIEd3szpf4b3euduK/VStPVvAJgW7MeuzvF0iW+b5A7e+EUJ/5ajieW+Tr7miBUAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2e06b314ddd4b1b06137ce5e33b4ff68b2168225e84a05a7efd92b53df0e7015","last_reissued_at":"2026-05-18T02:26:12.092110Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:26:12.092110Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.07026","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":"2026-05-18T02:26:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VEQdVEAOp7x8MhA9t5zSm8sIOD/Tm/9IDAjwAA/sRU4Iq/j+a0LyTAH7tP2/oxjATbzm2hhcrTeNnSEIAeqVBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T14:14:08.961924Z"},"content_sha256":"6e4c34dc21ae145ff95b3c8da72cf067e7cae9e4f3a2edea691ab947cf072ec2","schema_version":"1.0","event_id":"sha256:6e4c34dc21ae145ff95b3c8da72cf067e7cae9e4f3a2edea691ab947cf072ec2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:FYDLGFG52SY3AYJXZZPDHNH7NC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Undergraduate Signal Processing Laboratories for the Android Operating System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CY","authors_text":"Andreas Spanias, JJ Thiagarajan, KN Ramamurthy, Mahesh Banavar, Shuang Hu, Suhas Ranganath","submitted_at":"2015-02-25T01:30:31Z","abstract_excerpt":"We present a DSP simulation environment that will enable students to perform laboratory exercises using Android mobile devices and tablets. Due to the pervasive nature of the mobile technology, education applications designed for mobile devices have the potential to stimulate student interest in addition to offering convenient access and interaction capabilities. This paper describes a portable signal processing laboratory for the Android platform. This software is intended to be an educational tool for students and instructors in DSP, and signals and systems courses. The development of Androi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.07026","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":"2026-05-18T02:26:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x34ehLZpaKfypVn1+1ZxY+1XV6ZMffrQGRQZwQwwPAk4X9SJ/1XcV/QQBOYwflVXQPGJMDfGVx56YikuBhNrBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T14:14:08.962263Z"},"content_sha256":"5725cd1efee69ed3992c739e9e99b538173dc6de5b36ccb5fd1a8e425889dd4c","schema_version":"1.0","event_id":"sha256:5725cd1efee69ed3992c739e9e99b538173dc6de5b36ccb5fd1a8e425889dd4c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FYDLGFG52SY3AYJXZZPDHNH7NC/bundle.json","state_url":"https://pith.science/pith/FYDLGFG52SY3AYJXZZPDHNH7NC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FYDLGFG52SY3AYJXZZPDHNH7NC/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":"2026-06-09T14:14:08Z","links":{"resolver":"https://pith.science/pith/FYDLGFG52SY3AYJXZZPDHNH7NC","bundle":"https://pith.science/pith/FYDLGFG52SY3AYJXZZPDHNH7NC/bundle.json","state":"https://pith.science/pith/FYDLGFG52SY3AYJXZZPDHNH7NC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FYDLGFG52SY3AYJXZZPDHNH7NC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:FYDLGFG52SY3AYJXZZPDHNH7NC","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":"db27a29693192bcfeb9641c86515572cfda5aaa957efa554a9cfbecddcade24e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2015-02-25T01:30:31Z","title_canon_sha256":"9e5e4429abbfd08b71875329ee596a75664cd6dd1827355eede6c338abd82620"},"schema_version":"1.0","source":{"id":"1502.07026","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.07026","created_at":"2026-05-18T02:26:12Z"},{"alias_kind":"arxiv_version","alias_value":"1502.07026v1","created_at":"2026-05-18T02:26:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.07026","created_at":"2026-05-18T02:26:12Z"},{"alias_kind":"pith_short_12","alias_value":"FYDLGFG52SY3","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"FYDLGFG52SY3AYJX","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"FYDLGFG5","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:5725cd1efee69ed3992c739e9e99b538173dc6de5b36ccb5fd1a8e425889dd4c","target":"graph","created_at":"2026-05-18T02:26:12Z","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 DSP simulation environment that will enable students to perform laboratory exercises using Android mobile devices and tablets. Due to the pervasive nature of the mobile technology, education applications designed for mobile devices have the potential to stimulate student interest in addition to offering convenient access and interaction capabilities. This paper describes a portable signal processing laboratory for the Android platform. This software is intended to be an educational tool for students and instructors in DSP, and signals and systems courses. The development of Androi","authors_text":"Andreas Spanias, JJ Thiagarajan, KN Ramamurthy, Mahesh Banavar, Shuang Hu, Suhas Ranganath","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2015-02-25T01:30:31Z","title":"Undergraduate Signal Processing Laboratories for the Android Operating System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.07026","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":"sha256:6e4c34dc21ae145ff95b3c8da72cf067e7cae9e4f3a2edea691ab947cf072ec2","target":"record","created_at":"2026-05-18T02:26:12Z","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":"db27a29693192bcfeb9641c86515572cfda5aaa957efa554a9cfbecddcade24e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2015-02-25T01:30:31Z","title_canon_sha256":"9e5e4429abbfd08b71875329ee596a75664cd6dd1827355eede6c338abd82620"},"schema_version":"1.0","source":{"id":"1502.07026","kind":"arxiv","version":1}},"canonical_sha256":"2e06b314ddd4b1b06137ce5e33b4ff68b2168225e84a05a7efd92b53df0e7015","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2e06b314ddd4b1b06137ce5e33b4ff68b2168225e84a05a7efd92b53df0e7015","first_computed_at":"2026-05-18T02:26:12.092110Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:26:12.092110Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jVxjfqv3peZ6BUjKLHxJhMIEd3szpf4b3euduK/VStPVvAJgW7MeuzvF0iW+b5A7e+EUJ/5ajieW+Tr7miBUAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:26:12.092537Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.07026","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6e4c34dc21ae145ff95b3c8da72cf067e7cae9e4f3a2edea691ab947cf072ec2","sha256:5725cd1efee69ed3992c739e9e99b538173dc6de5b36ccb5fd1a8e425889dd4c"],"state_sha256":"a932467f0b4324ea6b6d589df356e10aa3e92f864fb1c6d4b575878b45ee3ae5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"szJrNlLl7IKjDJTXgtT0/9+bWDmlyE60YO84iXowT9A4okFF1DKYaqy7DTilFSQr9Rku4ma73qubeozudlQcAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T14:14:08.964180Z","bundle_sha256":"83bc52f2591750a1ca15b330d8e73e2b86ae607aa04c632545777661e467d89a"}}