Pith Number

pith:7OCBT2VB

pith:2025:7OCBT2VB65OH7TKWKI65T7VUVV

not attested not anchored not stored refs pending

Unsupervised and semi-supervised clustering methods to identify and refine participant experience levels in educational research

Adrien Weihs, Helge Drange, Julien-Pooya Weihs, Vegard Gjerde

arxiv:2508.03840 v1 · 2025-08-05 · physics.ed-ph · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7OCBT2VB65OH7TKWKI65T7VUVV}

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	2026-07-05T11:49:59.849606Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fb8419eaa1f75c7fcd56523dd9feb4ad64e545561933caeab26fb02601c3fb82

Aliases

arxiv: 2508.03840 · arxiv_version: 2508.03840v1 · doi: 10.48550/arxiv.2508.03840 · pith_short_12: 7OCBT2VB65OH · pith_short_16: 7OCBT2VB65OH7TKW · pith_short_8: 7OCBT2VB

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/7OCBT2VB65OH7TKWKI65T7VUVV \
  | 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: fb8419eaa1f75c7fcd56523dd9feb4ad64e545561933caeab26fb02601c3fb82

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e14a44d66f366668ebf34b711b6248d5e177ac18f60e10e64a08b026bf4504f0",
    "cross_cats_sorted": [
      "physics.data-an"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2025-08-05T18:39:04Z",
    "title_canon_sha256": "9542fcf1c4dd09ae52d2fcdc259038955070033cb56f36fd93f067c870967f5e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.03840",
    "kind": "arxiv",
    "version": 1
  }
}