Development of composite radio telescope reflectors
Bibliographic record
Abstract
One of the keys to the success of the square kilometre array (SKA) radio telescope will be the development of cost effective collecting area. Development of construction techniques for composite reflectors is an active R&D focus at the National Research Council's Dominion Radio Astronomical Observatory (DRAO), near Penticton, Canada. Composite materials offer a range of benefits over traditional metal structures in the construction of large (10 m+ diameter) reflectors. The high specific modulus of composite materials results in the construction of lighter and stiffer reflectors and the low CTE of these materials yields thermally stable structures. New developments in composite manufacturing processes have the potential to make composites a cost effective alternative for reflector antennas. The team at DRAO constructed and tested its first 10 -m diameter prototype reflector, the Mk1, in 2007, a second prototype, Mk2, incorporating improvements in performance and manufacturability was completed in the fall of 2008. This paper presents a review of the Mk1 measurement results and the preliminary measurements of the Mk2.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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 | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".