Computing the Uniform Component of Shape Variation

Computing the uniform component of shape variation.

Any change in shape of a configuration of landmark points in two or three dimensions includes a uniform component, a component that is a wholly linear (affine) transformation. The formulas for estimating this component have been standardized for two-dimensional data but not for three-dimensional data. We suggest estimating the component by way of the complementarity between the uniform componen...

A uniform component modeling space

ion and levels of abstraction are important concepts in the modeling space, but the terms are rarely used in this paper. The reason is that four kinds of abstraction are part of the modeling space, corresponding A UNIFORM COMPONENT MODELING SPACE Informatica 25 (2001) 475-482 477 to the three dimensions plus views. Instead of using the general ‘abstraction’ term, each kind is discussed in its o...

The axisymmetric computational study of a femoral component to analysis the effect of titanium alloy and diameter variation.

This work presents a numerical approach in order to predict the influence of implant material stiffness in a femoral component design when submitted in compression. The implant success depends on the transferred load to the neighboring bone. The finite element method can be used to analysis the stress and strain distribution in the femoral component allowing to improve the implant selection. Fo...

Size and shape variation in the painted turtle. A principal component analysis.

The genetics of canine skull shape variation.

A dog's craniofacial diversity is the result of continual human intervention in natural selection, a process that began tens of thousands of years ago. To date, we know little of the genetic underpinnings and developmental mechanisms that make dog skulls so morphologically plastic. In this Perspectives, we discuss the origins of dog skull shapes in terms of history and biology and highlight rec...