A power-frequency current-comparator-based direct-reading four-terminal resistance bridge
Bibliographic record
Abstract
A current-comparator technique is applied to four terminal resistance measurements for obtaining a highly accurate direct-reading AC resistance bridge at power frequencies. Active circuits are used to establish equal voltage drops between the potential terminals of the two resistances being compared. The bridge features direct reading with six-digit resolution in either per-unit resistance or conductance. Nominal ratios of 1, 2, 5, 10, 20, 50, and 100 are available. A cascading technique using two two-stage current transformers provides extension of the ratio range to 10000000 with a maximum applied current to 10000 A. The ratio uncertainties of the current comparator at power frequencies, including the range extenders, are less than 5/spl times/10/sup -6/ in both magnitude and phase. The bridge is suitable for measuring resistances from 10 /spl mu//spl Omega/ to 10 k/spl Omega/.
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 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".