Identification Of Cut-points Research Articles

Identification of cut-points in test parameters for classification of industrial products

The paper considers the problem of classification of industrial products with increased quality requirements by production batches. Identification of homogeneous batches of industrial products is one of the most important problems in the way of improving the reliability and extending the lifetime. Homogeneity of product batches ensures the reliability of destructive test results. A more consistent operation of elements with identical characteristics is also provided. We solve the problem of determining the cut-point values of test parameters for further construction of a rule-based classifier.

Cut Points in PEG

Parsing Expression Grammar (PEG) encodes a recursive-descent parser with limited backtracking. It has been recently noticed that in the situation when the parser is to explore several alternatives one after another, no further alternatives need to be explored after the parser reached certain “cut p oint”. This fact can be used to save both processing time and storage. The subject of the paper is identification of cut points, which can also help in producing better diagnostics.

Identification of cut-points in commonly used hip osteoarthritis-related outcome measures that define the patient acceptable symptom state (PASS)

To determine patient acceptable symptom state (PASS) estimates in outcome measures commonly used in hip osteoarthritis (OA). Identification of cut-points on commonly used outcome measures associated with patient satisfaction with their current state of health. As part of a randomized controlled trial, 70 patients with a clinical diagnosis of hip OA undergoing a 9-session physiotherapy treatment program completed four physical performance measures and three self-report measures at 9 weeks and 1 year. Upon completion of treatment, patients assessed their current health status according to the PASS question. Cut-points were estimated using receiver operating characteristic curves (anchor-based method), based on the patient's response to the PASS question. At 9 weeks and 1 year, identified cut-points were, respectively, ≤10 and ≤11 for the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain subscale; ≤35 and ≤40 on the WOMAC physical function subscale; ≥+5 and ≥+6 on the global rating of change score; ≤6.05 and ≤5.30 s for the timed-up-and-go; ≤28.3 and ≤24.9 for the 40-m self-paced walk test; ≥11 and ≥12 repetitions for the 30-s chair stand test; and ≥46 repetitions for the 20-cm step test. Initial target cut-points signaling patient satisfaction with their current symptom state following physiotherapy in patients with hip osteoarthritis were determined for seven outcome measures over 1 year.