نتایج جستجو برای: observer variation
تعداد نتایج: 323330 فیلتر نتایج به سال:
Just as scientific records can be vulnerable to variation between different pieces of recording equipment, so observational records are subject to differences in how observers score behaviour. However one can judge how much confidence to place in one's results by assessing the reliability of the records of one's variables. In this paper we shall consider only inter-observer reliability or score...
This paper presents the synthesis of an adaptive observer which is used for the improvement of the direct torque control of induction motor drives. The observer detects stator flux components in two-phase stationary reference frame, rotor speed and stator resistance by measure of the stator terminal voltages and currents. The observer is adapted using a simple algorithm which does not imply a h...
background: los angeles classification is widely adopted as a means of unifying endoscopic observation for gerd. we assessed the inter- and intra-observer variability of la classification. materials and methods: two-hundred fifty-four still images of the lower esophagus taken by an expert endoscopist (rm) were randomly selected and presented to 9 gastroenterologists (2 females, 6 experts, 3 tra...
The size of the liver and spleen of 32 patients was assessed by four clinicians from a clinical examination and by four radiologists from a plain radiograph of the abdomen. The latter assessment was found to be subject to less variation than the former, particularly in regard to the liver. Large livers and spleens were more easily seen radiologically than small ones. Most of the variation among...
A stratified random sample of 100 cervical smears was taken from routine population screening material and graded by three cytological laboratories. The sensitivity of the smear test for detecting cervical malignancies varied from 72 to 88%-a difference of 16%; for all serve epithelial abnormalities the sensitivity varied from 52 to 71% (a difference of 19%). The histological material pertainin...
BACKGROUND This study was designed to measure inter-observer variation between thoracic radiologists in the diagnosis of diffuse parenchymal lung disease (DPLD) using high resolution computed tomography (HRCT) and to identify areas of difficulty where expertise, in the form of national panels, would be of particular value. METHODS HRCT images of 131 patients with DPLD (from a tertiary referra...
OBJECTIVE To determine how often observer variation in the interpretation of intra-arterial angiograms might alter the decision whether or not to refer patients for carotid surgery. METHODS A prospective study was carried out in a consecutive series of 99 patients with transient ischaemic attacks and minor strokes. Interpretable angiographic films were available for 179 carotid artery bifurca...
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