Cylindrical waveguide applicator for in vitro exposure of cell culture samples to 1.9‐GHz radiofrequency fields
Bibliographic record
Abstract
An applicator for in vitro cell culture exposure was developed based on a circularly polarized, cylindrical waveguide for the 1.9-GHz frequency band used by Personal Communications Services (PCS) in Canada. The applicator consists of two coaxial Petri dishes that sit on the open end of the cylindrical waveguide. The inner 60-mm Petri dish contains the cell culture while the outer 150-mm dish contains coolant water, which is circulated from a pump. A dosimetric evaluation was made using thermometric and E-field probe techniques. The latter allowed the entire inner dish to be scanned to determine the range of specific absorption rates (SARs) pertinent to the expected position of the cells. A representative SAR rate (SAR per unit of input power) of 8.6 +/- 2.1 W/kg/W (95th percentile) was determined 1 mm from the bottom, for a 10 ml sample volume of standard medium. Evaluation of the cooling system demonstrated that following an initial 0.3 degrees C temperature increase, a constant temperature was maintained for 24 h when the waveguide was energized to achieve an average sample SAR of 10 W/kg. These properties enable both acute and sub-acute in vitro bio-effect studies to be performed on a variety of cell culture samples.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| 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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".