# principal axis

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Related to principal axis: centre of curvature

## principal axis

In optics, a line that passes through the optical center or nodal point of a lens perpendicular to the surface of the lens.
References in periodicals archive ?
Furthermore, at the target attitude, the principal axis III of the FFRB coincides with the Z-axis of the inertial flame.
The direction of the major principal axis with respect to the x-axis is given by [alpha] if [I.sub.xx] < [I.sub.yy] or [alpha] + [pi]/2 if [I.sub.xx] > [I.sub.yy].
In seeking to answer the second question, we found that the number of factors identified in EFA is totally independent of the extraction method used (Principal Components, Principal Axis Factoring, and Maximum Likelihood), since they were all identical, both for the Eigenvalue definition method and for the Scree Plot method.
When a point has a large contribution, at a large principal coordinate at a major principal axis, it is called an outlier.
Two subscales, ethnic socialisation and racial socialisation, were identified through principal axis factor analysis.
The attitude of the trunk segment was determined from the principal axis using the point cluster technique (Chaudhari et al., 2005; Andriacchi et al., 1998).
Walls (2004) conducted a principal axis factor analysis of Quest items and examined the relationships of the resulting three factors to personality dimensions of the NEO-FFI in a sample of university students.
The results of the principal axis factor analysis (loadings and communality) are included in Table 2.
Its principal axis consists of two pieces with the same title, Je to jedno (It Doesn't Matter), a suite of drawings from 2005-2007 and a video from 2006.
The stands will include seating for a further 21 000 spectators, and to the north the principal axis will be marked by the higher members' pavilion that will include 80 hospitality boxes.
The 115km Guangdong-Shenzhen-Hong Kong transport railway is one of two principal axis lines in the Guangdong-Shenzhen-Hong Kong railway network, offers a top speed of 350km/hr and is expected to carry several million people each year from Beijing to Hong Kong.

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