{
  "annotation_id": "ae99f2fb-de0d-460a-bead-974f2c661095",
  "date_created": "2026-03-02T18:01:14.458000Z",
  "date_modified": "2026-03-02T18:01:14.458000Z",
  "file_hash": "30a2c8c553824f8311b3e2295642b35ce2eaf9751e393da9b15fc525868f133a",
  "private": false,
  "record": {
    "abstract": "We have investigated the origin of fluctuations in the aggregated behaviour\nof an open-source software community. In a recent series of papers, de Menezes\nand co-workers have shown how to separate internal dynamics from external\nfluctuations by capturing the simultaneous activity of many system\u0027s\ncomponents. In spite of software development being a planned activity, the\nanalysis of fluctuations reveals how external driving forces can be only\nobserved at weekly and higher time scales. Hourly and higher change frequencies\nmostly relate to internal maintenance activities. There is a crossover from\nendogenous to exogenous activity depending on the average number of file\nchanges. This new evidence suggests that software development is a\nnon-homogeneous design activity where stronger efforts focus in a few project\nfiles. The crossover can be explained with a Langevin equation associated to\nthe cascading process, where changes to any file trigger additional changes to\nits neighbours in the software network. In addition, analysis of fluctuations\nenables us to detect whether a software system can be decomposed in several\nsubsystems with different development dynamics.",
    "arxiv_id": "physics/0609183",
    "authors": [
      "Sergi Valverde"
    ],
    "categories": [
      "physics.soc-ph"
    ],
    "doi": "10.1209/0295-5075/77/20002",
    "title": "Crossover from Endogenous to Exogenous Activity in Open-Source Software   Development",
    "url": "https://arxiv.org/abs/physics/0609183"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ed31a104-2edb-4ad1-851a-77fdc55178f5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}