An ion gating strategy for a miniaturized planar Ion Mobility Spectrometer
Bibliographic record
Abstract
In Ion Mobility Spectrometry, the identities of charged species are determined by measuring their mobility in an electric field and comparing the results to an established database. The charged species may be from a toxin, drug, or organic compound. Measurements are made on small packets of ions, since measurements on a continuous stream of ions does not provide drift time information. The performance of an Ion Mobility Spectrometer is largely determined by the effectiveness of the ion gating technique and the ability to emit and block ions from entering the drift region. A miniaturized version of an Ion Mobility Spectrometer is more easily integrated with other microfluidic devices and would be useful in portable applications. However, a customized gating strategy is required that is compatible with the design and fabrication of these miniaturized devices. This work examines a gating strategy and counter-electrode configuration for a ‘planar-type’ Ion Mobility Spectrometer with an electrospray ionization source. Numerical modeling and device testing confirms the static operation of the proposed strategy. Applications of Ion Mobility Spectrometry are in health care, biotechnology, and security.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 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".