Jens Feder Fractal Structures and Self Organization (TMR network) Fractals; Flow in Porous Media; Granular Materials; Fracture Mechanics; Friction. Available in: Hardcover. This lovely little book will take off and fly on its own power, but the author has asked me to write a few words, and one. Jens Feder is the author of Fractals ( avg rating, 2 ratings, 0 reviews, published ), Fractals in physics ( avg rating, 0 ratings, 0 reviews.

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Series I Physics Physique Frqctals. This value for D is an upper limit since estimation from variograms, leads to positively biased results if the data are log-normal and of a limited preci- sion at low concenctrations.

For some elements the solubility in HNO3 is low and of doubtful significance.

Whether geochemical distribution patterns of certain elements in various sampling media can fedr usefully characterized by fractal dimensions must be tested on empirical data sets. The uncertainties are estimates from the covariance matrix of the fits. Returns must be postmarked within 4 business days of authorisation and must be in resellable condition.

The Hurst exponent H fracttals A1 is calculated to 0. This typically gave 65 independent linear equations for each estimated concentration. General contact details of provider: In this case Dt is 1. Note the logarithmic scale of the axes. This lovely little book will take off and fly on its own power, but the author has asked me to write a few words, and one should not say no to a friend.


Jens Feder

From our data-sets of irregularly spaced geochemical samples, we have estimated values in a square grid by Kriging. This type of systematic survey employ- ing the principles of fractal geometry for stepwise selection and progressively more thorough exami- nation of subareas of decreasing size, would apply to any survey area of interest and could improve cost-efficiency in mineral exploration.

Normalized semi-variograms dots for 10 acid soluble elements in the minus 0. Objects or phenomena that are created by stochastic processes where all length scales have equal opportunity to be realized, become fractal.

However, the data-set should be square gridded for computer treatment, and the required interpolation between ir- regularily spaced sample points would be a drawback as mentioned above. If it can be shown that geochemical landscapes are usually true fractals analogoues to topographic landscapes, the impact on applied geochemistry may be profound.

We cannot take responsibility for items which are lost or damaged in transit. The “ideal” shape semi-variogram. BoxBlindern, N Oslo 3, Norway.

Phys. Rev. Lett. 55, () – Viscous Fingering Fractals in Porous Media

If you are a registered author of this item, you may also want fravtals check the “citations” tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation. He did not attempt to say everything, but what he said is just fine. Help us Corrections Found an error or omission? The abscissa has a logarithmic scale, but is with- out a defined length unit. The previous remarks regarding adjustment to the sensitivity of the an- alytical method, as well as the requirement for interpolation between data points for the area-perimeter relation, are also valid in this case.


However, the fractal dimension, D, tends to be overestimated when employing untransformed log-normal data, and the results should be treated with care.

Fractals by Jens Feder (English) Paperback Book Free Shipping! | eBay

Please note that corrections may take a couple of weeks to filter through the various RePEc services. These are typical properties of fractal objects – – they have a fractal dimension.

Modern aerial gamma-ray spectrometry and regional potassium map of the conterminous United States. This strategy is generalized in the sketches in Figs. Unauthorised returns will not be accepted. Skip to main content. Geochemical Atlas of Northern Fennoscandia, scale 1: Last but not least, we are all grateful to Jens for not deder allowed undue personal modesty to deprive us of accounts of his own group’s varied and excellent work.

Chemical maps of ferromanganese encrustations in Pacific Ocean.

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Oxidates as a geohcemical fratals medium in granitic terrain. ISBN 3 For each point on the grid we solved the Kriging equations, including all measured concentrations within a circle o f 50 km. Plenum Press, New York, pp. The area-perimeter relation for AI Fig.

Statistical properties of sediment bed profiles in alluvial ftactals. This self-similarity is a type of symmetry that can be used to characterize disordered geometric systems.