Pith Number

pith:NG6DLPZU

pith:2021:NG6DLPZUYFAACSGPO7EX2YUI46

not attested not anchored not stored refs pending

Fine-Grained Classroom Activity Detection from Audio with Neural Networks

Ana Usenko, Brian Hutchinson, Chris Daw, Eric Slyman, Morgan Skrabut

arxiv:2107.14369 v2 · 2021-07-29 · eess.AS · cs.NE · cs.SD

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NG6DLPZUYFAACSGPO7EX2YUI46}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T03:30:40.918670Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69bc35bf34c1400148cf77c97d6288e786e0dad4f64c482629cbef1ee1c7fe26

Aliases

arxiv: 2107.14369 · arxiv_version: 2107.14369v2 · doi: 10.48550/arxiv.2107.14369 · pith_short_12: NG6DLPZUYFAA · pith_short_16: NG6DLPZUYFAACSGP · pith_short_8: NG6DLPZU

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/NG6DLPZUYFAACSGPO7EX2YUI46 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 69bc35bf34c1400148cf77c97d6288e786e0dad4f64c482629cbef1ee1c7fe26

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8fc2a31a2f6c9fc73f3390e7b247d779a8d3707b3781f8963e4c406a2164eb5c",
    "cross_cats_sorted": [
      "cs.NE",
      "cs.SD"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.AS",
    "submitted_at": "2021-07-29T23:23:52Z",
    "title_canon_sha256": "300280ee4f9c273cc0153d9b80fa058b2d7340edad55438eb1f57c4d2b96b2ca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.14369",
    "kind": "arxiv",
    "version": 2
  }
}