Collisional experiences with Dr. Pietro Traldi and the incredible group in Padova
Bibliographic record
Abstract
Two Early Classic period (ca. 250-600 CE) Maya carved, greenstone jade pendants, Specimens A and B, were recovered from the Pacbitun site in Belize in 1987. The specimens were visually similar and may have been cut from a common jade piece. Mass spectrometry was considered as a technique that could possibly be used to explore the similarity of the specimens. However, at that time, neither electrospray ionization nor matrix-assisted laser desorption/ionization (MALDI) had been discovered; furthermore, only elemental analysis had been carried out with jade samples and there were no accounts of polyatomic ions being produced from jade. The discoverer of the greenstone jade pendants, a faculty member in Anthropology at Trent University, sought the assistance of the author of this piece but no immediate progress was accomplished. About 7 years after discovery of the greenstone jade pendants, this author was invited to spend a short sabbatical leave in the laboratory of Dr. Pietro Traldi in Padova, Italy. While this invitation was attractive for several reasons, the principal attraction was Dr. Traldi's new, and mysterious acquisition of MALDI instrumentation. There was, perhaps, a single iota of reason that appeared to suggest unusual assistance of a matrix in liberating polyatomic ions from jade using laser irradiation. This account is of a very interesting sojourn with Dr. Traldi and members of his laboratory which did not lead to any immediate understanding of MALDI; however, the belief was constant for the next 20 years after which some progress was made in the exploration of the structure of jade.
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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 | 0.003 | 0.005 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.015 | 0.009 |
| Scholarly communication | 0.005 | 0.003 |
| Open science | 0.002 | 0.010 |
| Research integrity | 0.003 | 0.011 |
| Insufficient payload (model declined to judge) | 0.010 | 0.004 |
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".