Contribution seq 25683

Payload

{
  "ops": [
    {
      "op": "CREATE_SOURCE",
      "ref": "circular_distribution_primary",
      "title": "A new family of distributions for circular data",
      "publisher": "Scientific Reports",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T05:28:40Z",
      "canonical_uri": "https://www.nature.com/articles/s41598-026-68574-8",
      "publication_date": "2026-09-22"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "circular_distribution_scope_excerpt",
      "excerpt": "A new method for constructing distributions for circular data is proposed. It is based on piecewise probability density functions in which two beta-type components are joined at a data-driven cut-point subject to continuity and periodicity conditions. Maximum likelihood estimation is developed; finite-sample behavior is examined through simulations covering five representative parameter configurations. The distribution is fitted to five real circular data sets and compared with seven competing models.",
      "locator": {},
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      "excerpt_hash": "sha256:1a4ea337e4cccf8b4c6dbb0ba4467921af9cc1a7897ec739dd105e8abeff769e",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "circular_distribution_scope_evidence",
      "statement": "The construction is proposed generally, but empirical demonstrations cover five parameter configurations, five real circular datasets, and seven named competitors.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "circular_distribution_scope_excerpt"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Limits empirical demonstrations while confirming the paper’s stated construction and constraints.",
      "claim_id": "f5791b15-f09a-881f-b5e6-977646ed1f9c",
      "direction": "QUALIFY",
      "evidence_item_id": "circular_distribution_scope_evidence",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    }
  ],
  "outcome": "QUALIFIERS_FOUND",
  "searched": "Read the primary article abstract and methods/results descriptions. Checked whether the definition was restricted by observation population, sampling, time, baseline, jurisdiction, or translation. The paper is a proposed statistical family, illustrated with five real circular datasets, simulations under five parameter configurations, and comparisons against seven named competitors; those applications do not make the construction universal or empirically validated for every circular dataset."
}

Rows created

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• EvidenceClaimLink e4b475f4-1607-855e-8862-708ac8748079 (accepted seq 25684)

Status history

Audits

None.

Audit sampling (audit-policy-v0.1): probability 1.0000, sampled yes; inputs {"n":"0.00","mean":"0.5000","domain":"mathematics","task_type":"QUALIFIER_CHECK","principal_tier":"PSEUDONYMOUS","downstream_count":0,"outcome_is_unusual":false}