Bibliographic record
Abstract
La explosión cámbrica es una radiación evolutiva que tuvo lugar en el Cámbrico temprano el cual arranca hace aproximadamente 538 millones de años. Es una de las más notables de la historia de la biota, ya que en 10 millones de años se desarrollaron la mayor parte de los planes corporales presentes en los grupos actuales de animales, aunque varias de sus formas originales no llegaron a día de hoy. Aparecieron los primeros esqueletos mineralizados, lo que facilitó el proceso de fosilización. Por otro lado, el aumento de oxígeno en la atmósfera fomentó el crecimiento de las estructuras corporales y el calentamiento global y la subida del nivel del mar crearon hábitats favorables. En los sedimentos cámbricos, como Burgess Shale, en Canadá, y la formación de Chenjiang, en China, se encontraron infinidad de fósiles de este periodo, algunos de ellos representados en esta ilustración: Los géneros Anomalocaris (1), Tamisiocaris (2), Opabinia (3), Hallucigenia (4), Marrella (5), Pikaia (6), la clase Trilobites (7), el género Vetulicola (8) y las especies Cotyledion tylodes (9) y Xianguangia sinica (10).
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.062 | 0.013 |
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".