Publication

Methods and device to quantify human physical activity pattern

Kamiar Aminian, Anisoara Ionescu
2009
Patents

Abstract

The method for analyzing physical activity of a subject comprises: -) measuring at least one of body movement or posture of the subject using at least one sensor; -) defining a plurality of physical activity time series based on at least one of the measured body movement or posture; -) characterizing the plurality of physical activity time series based on at least one of fractal analysis or symbolic dynamic statistics to obtain a plurality of non-linear physical activity metrics; and -) comparing the non-linear physical activity metrics for the subject to non-linear physical activity metrics previously obtained for one or more other subjects.

Official source

https://infoscience.epfl.ch/entities/publication/0974a9c9-6533-484e-a65d-8fadb55ae68d

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Kamiar Aminian, Anisoara Ionescu
2009
Patents

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/0974a9c9-6533-484e-a65d-8fadb55ae68d

About this result

Related concepts (16)

Fractal analysis

Fractal analysis is assessing fractal characteristics of data. It consists of several methods to assign a fractal dimension and other fractal characteristics to a dataset which may be a theoretical dataset, or a pattern or signal extracted from phenomena including topography, natural geometric objects, ecology and aquatic sciences, sound, market fluctuations, heart rates, frequency domain in electroencephalography signals, digital images, molecular motion, and data science. Fractal analysis is now widely used in all areas of science.

Fractal

In mathematics, a fractal is a geometric shape containing detailed structure at arbitrarily small scales, usually having a fractal dimension strictly exceeding the topological dimension. Many fractals appear similar at various scales, as illustrated in successive magnifications of the Mandelbrot set. This exhibition of similar patterns at increasingly smaller scales is called self-similarity, also known as expanding symmetry or unfolding symmetry; if this replication is exactly the same at every scale, as in the Menger sponge, the shape is called affine self-similar.

Fractal dimension

In mathematics, a fractal dimension is a term invoked in the science of geometry to provide a rational statistical index of complexity detail in a pattern. A fractal pattern changes with the scale at which it is measured. It is also a measure of the space-filling capacity of a pattern, and it tells how a fractal scales differently, in a fractal (non-integer) dimension. The main idea of "fractured" dimensions has a long history in mathematics, but the term itself was brought to the fore by Benoit Mandelbrot based on his 1967 paper on self-similarity in which he discussed fractional dimensions.

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Methods and device to quantify human physical activity pattern

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