BACKGROUND The detection of adenomatous lesions is a major indicator for quality and competence in colonoscopy. Little is known about adenoma detection rates (ADR) of endoscopy trainees. The aim of our study was to investigate the performance of trainee colonoscopists in detecting adenomas and to depict the shape of adenoma detection learning curves during apprenticeship. METHODS We retrospec...

This paper presents a technique to convert surfaces, obtained through a Data Dependent Triangulation, in Bezier Curves by using a Scalable Vector Graphics File format. The method starts from a Data Dependent Triangulation, traces a map of the boundaries present into the triangulation, using the characteristics of the triangles, then the estimated barycenters are connected, and a final conversio...

in this paper, we study spacelike dual biharmonic curves. we characterize spacelike dual biharmonic curves in terms of their curvature and torsion in the lorentzian dual heisenberg group . we give necessary and sufficient conditions for spacelike dual biharmonic curves in the lorentzian dual heisenberg group . therefore, we prove that all spacelike dual biharmonic curves are spacelike dual heli...

This study aims to understand the effect of decarburization on microcrack formation rails by an onsite (laying) test. Test pieces with and without were compared under same test conditions. The results show that affects microcracks plastic flow. Furthermore, we investigated using taken from actual tracks. A comparison a decarburized layer showed crack density unground was 2.7-5.7 times higher th...

Abstract Inspired by a paper Teseletso and Adachi (Miner Econ 8(10):21, 2021), the hypothesis regarding declining grade of mined copper ore its possible use as guide to future ultimate recoverable resources (URRs) is tested. As time axis, cumulative production taken. Grades can be either tonnage or annual grade. Correlation linear (grade tonnage) semi-logarithmic linear, logarithmic). We first ...

A large-scale video quality dataset called the VideoSet has been constructed recently to measure human subjective experience of H.264 coded video in terms of the just-noticeable-difference (JND). It measures the first three JND points of 5-second video of resolution 1080p, 720p, 540p and 360p. Based on the VideoSet, we propose a method to predict the satisfied-user-ratio (SUR) curves using a ma...

This work presents the a method for underwater stereo mapping and localization for detailed inspection tasks. The method generates dense, geometrically accurate reconstructions of underwater environments by compensating for the negative effects caused by image distortions due to refraction. A refractive model of the camera and enclosure is calculated offline using calibration images and produce...