Graphing Orbitals in Three Dimensions with Rotatable Density Plots

Brueckner Orbitals and Density-Functional Theory

By means of Many-Body Perturbation Theory (MBPT) it is shown that minimizing the energy expectation value of a closed-shell system in a certain order of the preturbation expansion by varying the partitioning of the Hamiltonian, leads to a zeroth-order function, which – as the order of perturbation increases and provided the expansion converges properly – approaches a determinant of Brueckner or...

Biology in three dimensions

Most things in biology spread out into three dimensions, and many biological web sites include three-dimensional images. But biologists want more than a look at something. They want to pick it up and look at it from all sides, which is where three-dimensional images that can be manipulated online really come into their own. One approach to such interactive images relies on VRML (virtual reality...

Collapsars in Three Dimensions

We present the results of 3-dimensional simulations of the direct collapse to a black hole of a rotating, 60M⊙, zero metallicity, population III star. Because the structure of this star (angular momentum, density and temperature profiles) is similar to many collapsar gamma-ray burst progenitors, these calculations have implications beyond the fate of population III stars. These simulations prov...

Supersymmetry in Three Dimensions

Thinking in three dimensions.

I have had only few major ‘‘eureka’’ moments in my life. One of them was when I realised the difference between ordinary linear thinking and systems thinking. Since then I have spent quite a lot of my time teaching systems thinking in one form or another to doctors, psychologists, educators and others. Sometimes people can be turned off by the word systems because it sounds so mechanical, but o...