The effect of polarity and surge repetition rate on electroluminescence in epoxy
Bibliographic record
Abstract
An experiment conducted to study the light emission from an electrically stressed transparent epoxy prior to the initiation of electrical trees is described. The effects of surge voltages from 0 to 15 kV, positive and negative polarities and repetition rate from 1 to 10000 p.p.s. on the light output were determined. It is shown that light pulses are emitted from transparent epoxy insulation, prior to the occurrence of a visible tree, during the application of 1- mu s-duration surges. The location of the light pulses with respect to the surge pulse shape depends on the surge polarity. That is, charge carriers cause light emission (and presumably move) when the needle is negative with respect to the space charge region in the surrounding epoxy. An observation that the rate of light emission decreases with decreasing time between surges may imply that it takes a finite time for the space charge in the epoxy surrounding the needle tip to decay. Such repetition rate measurements may provide a measure of the detrapping times.>
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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 | 0.002 |
| 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) | 0.001 | 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 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".