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In the natural sciences, especially in atmospheric and Earth sciences involving applied statistics, an anomaly is a persisting deviation in a physical quantity from its expected value, e.g., the systematic difference between a measurement and a trend or a model prediction. [1]
Anomalous propagation can be a limiting factor for the propagation of radiowaves, especially the super refraction. However, reflection on the ionosphere is a common use of this phenomenon to extend the range of the signal. Other multiple reflections or refractions are more complex to predict but can be still useful.
Henry Bauer, emeritus professor of science studies at Virginia Tech, writes that anomalistics is "a politically correct term for the study of bizarre claims", [5] while David J. Hess of the Department of Science and Technology Studies at the Rensselaer Polytechnic Institute describes it as being "the scientific study of anomalies defined as ...
Also referred to as frequency-based or counting-based, the simplest non-parametric anomaly detection method is to build a histogram with the training data or a set of known normal instances, and if a test point does not fall in any of the histogram bins mark it as anomalous, or assign an anomaly score to test data based on the height of the bin ...
Anomalous precession, another term for "apsidal precession" Eccentric anomaly, an intermediate value used to compute the position of a celestial object as a function of time; Flyby anomaly, an unexpected energy increase during the flybys of the Earth by various satellites; Mean anomaly, a measure of time in the study of orbital dynamics
Examples of anomalous diffusion in nature have been observed in ultra-cold atoms, [3] harmonic spring-mass systems, [4] scalar mixing in the interstellar medium, [5] telomeres in the nucleus of cells, [6] ion channels in the plasma membrane, [7] colloidal particle in the cytoplasm, [8] [9] [10] moisture transport in cement-based materials, [11 ...
Cerium in coal is typically weakly negative, meaning that it is present at slightly lower concentrations than the other rare-earth elements. [2] Cerium anomalies in coal are influenced by the sediment source region. [2] Coal mined from mafic regions dominated by basalts, such as the location of the Xinde Mine in China, does not have a Ce ...
Anomalous global symmetries are often consistent, but anomalous gauge symmetries are usually inconsistent. Pages in category "Anomalies (physics)" The following 19 pages are in this category, out of 19 total.