Characterization of two apertures microfluidic probe
Bibliographic record
Abstract
The Microfluidic probe (MFP) is a mobile channel-less microfluidic system where a liquid is injected from one aperture into one open space and re-aspirated from a second aperture at a higher aspiration flow rate forming a Hydodynamically Confined Stream (HCS). In this work, we characterize both analytically and numerically the geometry of the HCS and the shear stress at the bottom substrate with respect to the ratio of aspiration to injection flow rates, gap size, and the diffusion coefficients of the injected liquid in the solute. The finite element method is used to simulate numerically the flow confinement, and dimensionless analysis is employed to characterize the concentration and shear stress profiles. We found that width and length of the HCS increases linearly with increasing gap size, and it shrinks linearly with respect to the ratio of aspiration to injection flow rates. Thanks to the establishment of the scaling laws and the numerical model we developed here, the parameters of the MFP can be predicted easily through simulation instead of having to determine them experimentally by trial and error.
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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 | 0.001 |
| 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 | 0.001 | 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".