Group morphology

Group-Invariant Frames for Colour Morphology

In theory, there is no problem generalizing morphological operators to colour images. In practice, it has proved quite tricky to define a generalization that “makes sense”. This could be because many generalizations violate our implicit assumptions about what kind of transformations should not matter. Or in other words, to what transformations operators should be invariant. As a possible soluti...

Morphology and Nature of the Pleuropneumonia Group of Organisms.

The organism of bovine pleuropneumonia was first cultivated by French investigators (Nocard et al., 1898). In their cultures, however, they were not able to see the individual organisms. Twelve years later Bordet (1910) succeeded in seeing them in Giemsa-stained preparations. They appeared as small granules, fine curved filaments, and round forms of variable size. The latter were similar to the...

Strategies to control morphology in hybrid group III-V/group IV heterostructure nanowires.

By combining in situ and ex situ transmission electron microscopy measurements, we examine the factors that control the morphology of "hybrid" nanowires that include group III-V and group IV materials. We focus on one materials pair, GaP/Si, for which we use a wide range of growth parameters. We show through video imaging that nanowire morphology depends on growth conditions, but that a general...

Prosodic Morphology and Templatic Morphology

Deuterostome phylogeny and the sister group of the chordates: evidence from molecules and morphology.

Complete coding regions of the 18S rRNA gene of an enteropneust hemichordate and an echinoid and ophiuroid echinoderm were obtained and aligned with 18S rRNA gene sequences of all major chordate clades and four outgroups. Gene sequences were analyzed to test morphological character phylogenies and to assess the strength of the signal. Maximum-parsimony analysis of the sequences fails to support...