Results 261 to 270 of about 81,064 (299)
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Artifacts of Recording and Common Errors in Interpretation
2017This chapter examines the fundamental neurophysiological principles involved in determining electroencephalographic (EEG) artifact and provides general instructions for minimizing the risk of error during clinical interpretation. Examples from EEG recordings are given to illustrate common artifacts that may be challenging to the reader because they ...
William O. Tatum +2 more
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Errors and Artifacts of Carotid Ultrasound Evaluation
2012This chapter covers the errors than can be made in the ultrasound evaluation of carotid artery disease and suggests approaches to minimize them. The following are discussed: inter-technologist variability, inconsistent definition of percent stenosis or application of diagnostic criteria, incorrect angle of insonation, clinical situations affecting peak
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Sampling error as a misleading artifact in “key factor analysis”
Population Ecology, 1971SummaryThe influences of sampling error in key factor analysis are investigated statistically. The error involved in the data distorts the results in various misleading ways. In the course of detecting key factors by correlation analysis, the distortion arises in the following two ways: (1) the contributions made by the first and the last components of
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Errors and artifacts encountered in the monitoring of fetal respiratory movements using ultrasound
Ultrasound in Medicine & Biology, 1975Abstract A study is described of the possible sources of error and artifact arising in the monitoring of fetal respiratory movements using ultrasound, and their effect upon the clinical usefulness of the technique. Major artifacts arose from attempts to use the instrument controls to compensate for a poor choice of insonation direction, and from the
G. Thomas, R. J. Blackwell, D.J. Farman
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Removing Channel Error Artifacts in JPEG 2000 Coded Images
2007 IEEE International Conference on Signal Processing and Communications, 2007Segmentation symbol is an error resilience feature in JPEG 2000 image coding standard. When this feature is used, not detecting the segmentation symbol at the end of a bit plane by decoder, indicates that an error has occurred within that bit plane. However, a detected and correctly decoded segmentation symbol does not guarantee that the bit plane is ...
A. Sefidpour +2 more
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Error-compensation network for ringing artifact reduction in holographic displays
Optics LettersRecent advances in learning-based computer-generated holography (CGH) have unlocked novel possibilities for crafting phase-only holograms. However, existing approaches primarily focus on the learning ability of network modules, often neglecting the impact of diffraction propagation models.
Ganzhangqin Yuan +4 more
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Errors and Artifacts in Infrared Bands of CO Chemisorbed on Supported Metals
Spectroscopy Letters, 1982Abstract Nearly three decades have passed since Eischens et al. 1 measured the infrared bands of CO chemisorbed on Cu, Ni, Pt and Pd, and their assignments, unscathed by time and criticism, have prompted a great deal of infrared work on the interactions of CO with a wide variety of adsorbents. CO adsorption, followed by a variety of infrared techniques,
M.J.D. Low, C. Morterra, A. G. Severdia
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Artifacts and the Limits of Error
2023Abstract Artifacts are products of human agency. Though not necessarily institutional facts, artifacts are essential building blocks of our institutional reality. The main purpose of this chapter is to show that a proper metaphysical account of artifacts, in particular, of massive and intangible artifacts, is conducive to an ...
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Sampling Artifact Errors in Gas/Particle Partitioning Measurements
2020In this chapter, the role of gas/particle partitioning within filters during sampling as a cause of sampling artifact errors is explored. First, a mass balance model is developed to explain variations of particulate organic carbon concentration with sampling face velocity, sampling duration and filter type. Second, preliminary results of experiments to
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Persistent Leverage in Portfolio Sorts: An Artifact of Measurement Error?
2014Certains auteurs comme Lemmon, Roberts et Zender (2008) démontrent la stabilité à long terme de la structure financière des sociétés et se demandent s’il est nécessaire de formuler de nouvelles théories sur la structure du capital pour expliquer un tel phénomène.
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