A shell disc bead maker's workshop from Kavewa Island, northern Fiji
Bibliographic record
Abstract
ABSTRACT Test excavations of an early Lapita colonising site on Kavewa Island off the north‐east coast of Vanua Levu in 2012 encountered an abundant assemblage of Anadara shell disc beads and preforms, as well as lithic micro‐drills for bead perforation. Concentrated in the upper strata of a 1 × 1 m unit, radiocarbon dates place this assemblage in the interval 2490–2280 calBP. Production stages (chaîne opératoire) in bead manufacture are described as is the fabrication of micro‐drills through bipolar flaking of small quartz, chalcedony and chert clasts, locally acquired from Malau breccia. A survey of the Oceanic literature relating to stone drills and shell bead production finds a comparable assemblage only at Bootless Bay, Motupore Island, Papua New Guinea. This assemblage, however, is 3500 km distant and 1750 years more recent in time. The production of beads and micro‐drills represents specialised expertise. Whether this supported an external exchange system, or was exclusively related to household use, cannot be determined.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.003 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.007 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".