{
  "annotation_id": "10991495-1ed6-41b6-8b93-aa7c2163f0d7",
  "date_created": "2026-03-02T18:00:29.390000Z",
  "date_modified": "2026-03-02T18:00:29.390000Z",
  "file_hash": "c0322e2a80f36d2051a012aeed4df7b43f87338c6cd1d458d484b8a731d94af7",
  "private": false,
  "record": {
    "abstract": "Experiments on vertically oscillated granular layers in an evacuated\ncontainer reveal a sequence of well-defined pattern bifurcations as the\ncontainer acceleration is increased. Period doublings of the layer center of\nmass motion and a parametric wave instability interact to produce hexagons and\nmore complicated patterns composed of distinct spatial domains of different\nrelative phase separated by kinks (phase discontinuities). Above a critical\nacceleration, the layer becomes disordered in both space and time.",
    "arxiv_id": "patt-sol/9507003",
    "authors": [
      "Francisco Melo",
      "Paul Umbanhowar",
      "Harry L. Swinney"
    ],
    "categories": [
      "patt-sol",
      "nlin.PS"
    ],
    "doi": "10.1103/PhysRevLett.75.3838",
    "title": "Hexagons, Kinks and Disorder in Oscillated Granular Layers",
    "url": "https://arxiv.org/abs/patt-sol/9507003"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b8505db8-9fd1-4999-9eba-fe0e36c1c6d4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}