What is Diffuse Large B-Cell Lymphoma. Diffuse large B-cell lymphoma is a cancer that starts in white blood cells called lymphocytes. It is also called DLBCL. It usually grows in lymph nodes -- the pea-sized glands in your neck, groin, armpits, and elsewhere that are part of your immune system.
Can you please give me the definitions of homogeneity and isotropy in astronomy terms? This is a good question, because these concepts are a bit subtle. Homogeneous is defined as the same in all locations while isotropic means the same in all directions. Imagine that the whole universe is an infinitely large field with one perfectly symmetrical hill, which you are seated atop. Look around: you see an isotropic universe, since the hill is equally green and equally steep in all directions. But the universe is not homogeneous: it has a hill! These concepts are important because most modern cosmology is based on the cosmological principle, the assumption that, on large scales, the universe is both homogeneous and isotropic.
5.1 Kinetic energy and vorticity budgets in 3D turbulence The mean zonal velocity is zero by deï¬nition of homogeneity and isotropy. The theory of 3D isotropic homogeneous turbulence is therefore a theory of the second order statistics of the velocity ï¬eld, i.e. the kinetic energy E â¡ 1 / 2 u 2 i.The angle brackets represent an ensemble average. In order to understand the energy balance of 3D ï¬ows, it is useful to derive the vorticity equation.e can deï¬ne a characteristic scale l B at which overturning is suppressed by the buoyancy stratiï¬cation as follows. The velocity associated with a particular length scale l in high Reynolds number isotropic 3D turbulence scales like, u 2 â¼ / 3 k â 2 / 3 ââ u â¼ (l) 1 / 3.