X-ray Phase-Contrast Imaging and X-ray Absorption Fine Structure Analysis using Parametric X-ray Radiation Generated at LEBRA, Nihon University
Bibliographic record
Abstract
X-ray phase-contrast imaging and X-ray absorption analysis, including X-ray absorption fine structure (XAFS) analysis, were carried out using parametric X-ray radiation (PXR), which has unique characteristics such as monochromatic wavelength-tunable highly coherent X-ray radiation, generated at the Laboratory for Electron Beam Research and Application (LEBRA), Nihon University. Diffraction-enhanced imaging, a kind of phase-contrast imaging, was carried out using whole and sectioned teeth, a mouse kidney, and chicken and quail eggs. The obtained images showed some specific features that would be scarcely detected by other techniques. X-ray absorption edge analysis was applied to elemental analysis such as detecting arsenic in soil samples and strontium in fossil eggshells. A trial of XAFS was successfully carried out for metals and alloys. In this study, LEBRA-PXR was verified as a powerful and high ability X-ray source for X-ray phase-contrast imaging and absorption analysis, not only for hard tissues but also for soft tissues.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 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 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".