We explain the log2-transformed ratio by the following model: with c = 0,1, d = 0,1, a = 1,...,12, g = 1,...,10643, b = 0,1,2, b 1 = 0,1,2, b 2 = 0,1,2, where μ is the overall mean, A a is the overall array effect of array a, C c is the overall cell sample size effect of cell sample size c, D d is the overall dye effect of dye ratio case d, and G g is the overall gene effect of gene g.
In addition, based on the overall array CGH pattern of the mucosal and invasive parts of tumours, a discontinuous genetic lineage was found in 5 of the 6 advanced cancers.
Prior to examining inter- and intra-probe variance, it was important to first examine the overall array quality as a possible source of variance within our studies.
An additional measure of overall array quality is the average signal to noise ratio (S/N = (intensityspot - intensitybackground)/σbackground).
In these studies the overall detection of array CGH over chromosomal analysis was 12%.
We first used principal components analysis (PCA) to visualize the overall distribution of array data.
Microarray data were analyzed using standard analysis procedures, which included assessment of the overall quality of array data and statistical evaluation of differentially expressed genes (IntegraGen, Evry, France).
At the "system integration" level, efforts are made to manage each individual system as a loosely-coupled, relatively self-contained subsystem with defined interfaces to coordinate interdependencies with other parts of overall array.
The term 'structural' refers to the ability to learn the precise spatial (or temporal) relationships between the various elements that comprise the overall complex array, i.e. the structure of each element with reference to its surroundings.
