Measurement of coherent scattering form factors using an image plate
Why this work is in the frame
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Bibliographic record
Abstract
Two new methods for measuring x-ray coherent scattering form factors using an image plate were developed based on a matrix representation of the problem. The methods were tested experimentally using tube potentials of 50, 70 and 92 kV and different filtrations. Water and fat samples were measured and compared to data in the literature. For water, average absolute relative differences between 0.105 and 0.217 were measured when compared to the literature. Literature data for fat show a wide range of values. Our measured values were in the middle of the literature data range with average absolute relative differences between 0.126 and 0.528. The accuracy of the matrix methods was limited by the ill-conditioning of the problem and also experimentally by the limitations of our equipment. The matrix methods developed are shown to be relatively low resolution in momentum transfer parameter and limited to measurements on amorphous materials such as tissues where the attenuation of the x-ray beam is small. These methods, however, can be used to measure form factors with relatively inexpensive, clinical equipment.
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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 it