Bibliographic record
Abstract
In the summer of 1940, following the breakthrough work of John Randall and Harry Boot at the University of Birmingham earlier that year, cavity magnetron model E1189, serial no. 12 was assembled by Eric Megaw and his collaborators at GEC Laboratories in Wembley, UK. According to James Phinney Baxter III, Official Historian of the U.S. Office of Scientific Research and Development, “When the members of the Tizard Mission brought one to America in 1940, they carried the most valuable cargo ever brought to our shores.” The complete story of Cavity Magnetron No. 12, from the circumstances that led to its assembly at GEC Laboratories in Wembley to its pivotal role in the changing the direction of North American radar efforts during the Second World War to its current home at Ingenium in Ottawa, is widely dispersed amongst both published and unpublished sources. Here we present the results of our efforts to survey those sources, resolve some of the minor contradictions between various accounts, and add value to one of the most important items in Ingenium's collection.
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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 | 0.007 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.007 | 0.003 |
| Scholarly communication | 0.008 | 0.004 |
| Open science | 0.001 | 0.003 |
| Research integrity | 0.005 | 0.007 |
| Insufficient payload (model declined to judge) | 0.011 | 0.006 |
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".