Although clinicians have long sought to integrate computer-aided diagnostic (CAD) systems into routine clinical practice, it has proven to be extremely difficult to perform fully automated algorithmic analyses on lesions, based solely on the information contained in images. To increase the utility of computerized tools, it would be intuitive to incorporate anatomical and pathological knowledge ...

The crystal structure of human muscle creatine kinase has been determined by the molecular-replacement method and refined at 3.5A resolution. The structures of both the monomer and the dimer closely resemble those of the other known structures in the creatine kinase family. Two types of dimers, one with a non-crystallographic twofold symmetry axis and the other with a crystallographic twofold s...

In the title dihydrate salt, 2C12H24N(+)·SO4 (2-)·2H2O, the cation possesses twofold rotational symmetry, with the N atom situated on the twofold axis. The sulfate anion has fourfold roto-inversion symmetry, with the S atom located on the -4 axis. In the crystal, the components are linked via ammonium-sulfate N-H⋯O and water-sulfate O-H⋯O hydrogen bonds, forming a three-dimensional network.

We enumerate two-dimensional walks inside a band parallel to an axis of symmetry, using an algebraic approach. The restrictions along the boundary lines can be more complicated than just initial values of zeroes; we consider recursive initial values prescribing which predecessors a position at the boundary can have. More general, the initial conditions are expressed by certain linear operators ...

We consider a model of hydrogen-like artificial molecule formed by two vertically coupled quantum dots in the shape of axially symmetrical thin layers with on-axis single donor impurity in each of them and with the magnetic field directed along the symmetry axis. We present numerical results for energies of some low-lying levels as functions of the magnetic field applied along the symmetry axis...

Suggestions that peripheral imagery may affect the development of refractive error have led to interest in the variation in refraction and aberration across the visual field. It is shown that, if the optical system of the eye is rotationally symmetric about an optical axis which does not coincide with the visual axis, measurements of refraction and aberration made along the horizontal and verti...

The usual configuration of uniaxial whispering gallery mode resonators is a disk shaped geometry where the optic axis points along the symmetry axis, a so called z-cut resonator. Recently x-cut resonators, where the optic axis lies in the equatorial plane, became of interest as they enable extremely broadband second harmonic generation. In this paper we report on the properties of a more genera...

We propose a perceptually plausible mechanism for symmetry detection in natural images that consists of two steps: 1) A fast attentional step that creates a symmetry attention map followed by 2) a robust symmetry detection step that uses image edge statistics. The input is an image edge map, Ie, and the final output is a set of symmetry axes A = {a1, . . . , aS} with ai = ((xi, yi), oi) (centro...