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  2. Pore space in soil - Wikipedia

    en.wikipedia.org/wiki/Pore_space_in_soil

    The density of quartz is around 2.65 g/cm 3 but the dry bulk density of a soil can be less than half that value. Most soils have a dry bulk density between 1.0 and 1.6 g/cm 3 but organic soil and some porous clays may have a dry bulk density well below 1 g/cm 3.

  3. Permeability (porous media) - Wikipedia

    en.wikipedia.org/wiki/Permeability_(porous_media)

    These terms refer to the quality that the permeability value in question is an intensive property of the medium, not a spatial average of a heterogeneous block of material equation 2.28 [clarification needed] [further explanation needed]; and that it is a function of the material structure only (and not of the fluid).

  4. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    The soil bulk density of cultivated loam is about 1.1 to 1.4 g/cm 3 (for comparison water is 1.0 g/cm 3). [48] Contrary to particle density, soil bulk density is highly variable for a given soil, with a strong causal relationship with soil biological activity and management strategies. [49]

  5. Circle packing - Wikipedia

    en.wikipedia.org/wiki/Circle_packing

    [1] [2] While the circle has a relatively low maximum packing density, it does not have the lowest possible, even among centrally-symmetric convex shapes: the smoothed octagon has a packing density of about 0.902414, the smallest known for centrally-symmetric convex shapes and conjectured to be the smallest possible. [3]

  6. Wasserstein metric - Wikipedia

    en.wikipedia.org/wiki/Wasserstein_metric

    Then, [3] with respect to the usual Euclidean norm on , the 2-Wasserstein distance between and is (,) = ‖ ‖ + ⁡ (+ ()). where denotes the principal square root of . Note that the second term (involving the trace) is precisely the (unnormalised) Bures metric between C 1 {\displaystyle C_{1}} and C 2 {\displaystyle C_{2}} .

  7. Daantjie Badenhorst - Wikipedia

    en.wikipedia.org/wiki/Daantjie_Badenhorst

    His first novel, "Net een wenner" (Only One Winner) was published in 2005. [6] Badenhorst is married and has two children, Dirk (born 12 July 2004) and Suzanne (born 28 May 2007). He has Asperger syndrome [1] and campaigns for public awareness of the condition. [7]

  8. Distance of closest approach - Wikipedia

    en.wikipedia.org/wiki/Distance_of_closest_approach

    The excluded volume of particles (the volume excluded to the centers of other particles due to the presence of one) is a key parameter in such descriptions,; [2] [3] the distance of closest approach is required to calculate the excluded volume. The excluded volume for identical spheres is just four times the volume of one sphere.

  9. Mean inter-particle distance - Wikipedia

    en.wikipedia.org/wiki/Mean_inter-particle_distance

    We want to calculate probability distribution function of distance to the nearest neighbor (NN) particle. (The problem was first considered by Paul Hertz; [1] for a modern derivation see, e.g.,. [2]) Let us assume particles inside a sphere having volume , so that = /. Note that since the particles in the ideal gas are non-interacting, the ...