The phrase "a qualitative control" is correct and usable in written English.
It can be used in contexts related to quality assurance, research, or evaluation processes where qualitative aspects are being assessed or managed.
Example: "In our study, we implemented a qualitative control to ensure that the data collected reflected the participants' true experiences."
Alternatives: "a quality assessment" or "a qualitative measure".
The ground station controls the UAVs by utilizing a qualitative control algorithm.
In a qualitative control study, we recently demonstrated that non-anesthesiologist EMS physicians are able to achieve a 95% tracheal intubation (TI) success rate when they have had in-hospital training for at least 3 months [4].
More precisely, we employ age dummies as a qualitative control representing the first three quartiles of sample firms ranked by age, with the fourth quartile chosen as the reference category.
Expression of β-actin was used as a qualitative control to normalize the protein levels for the Western blot procedure.
Prior to dispensing prescriptions to medical wards, for each preparation, pharmacists carried out a qualitative control by verifying the patient's name, drug dose, and type and volume of dilution fluid in addition to a semi-quantitative control by comparing the ordered dose and number of vials used.
Each experiment included male or female wild-type DNA (for quantitative calibration and as a qualitative negative control), and positive control DNA with a known point mutation (as a qualitative positive control).
SOFLCs provide a qualitative adaptive control mechanism for adjusting the controller's behavior through the adaptation of initial expert derived rules that are trained to approximate a desired control behavior.
MMP control-1 (Sigma, Deisenhofen, Germany) was used as a qualitative positive control for MMP-1, -9, TIMP-1 and -2.
The proposed optimization method employs level set boundary expressions and a Tikhonov-based regularization scheme enables qualitative control of the geometric complexity of the optimal configurations.
The aims of the present study were as follows: (a) the quantification of commercially available qualitative control material for (b) the evaluation of the performance and sensitivity of the three multiplex assays RespiFinder-19, RespiFinder-SMART-22 and RVP fast assay and (c) the applicability and performance of these multiplex PCR assays in a routine setting.
The IC50 value of the nonspecific small molecule DUB inhibitor N-ethylmaleimide was 16.2 ± 3.2 μM and can be used as a qualitative positive control for the screen.
