![Figure 1.](/ServeContent?url=http%3A%2F%2Fdbm.sagepub.com%2Fcontent%2F5%2F1758736014557500%2FF1.medium.gif)
Figure 1.
Diagramatic view of the x-, y-, z-axes orientated to bracket as well as angles θ, γ, β (note: the bracket depicted is not meant to represent a particular type or design, and is only provided to aid in placing the coordinate system).