In both cases block effects can be considered as fixed or random.
The boundary conditions of the microbeam are considered as fixed at one end and free at the other end.
The signal angular change is slow so that it can be considered as fixed in the time interval t.
Various existing guidance laws based on linear or linearized formulation, in which desired terminal conditions are considered as fixed terminal output constraints, usually have linear-in-parameter structure.
For support conditions, either the base is considered as fixed or in a few cases, equivalent spring-dashpot system is considered.
The genotype means were estimated using a linear mixed model that considered replications and blocks within replications as random effects while the genotypes were considered as fixed effect.
Alkylation of cysteine by carbamidomethylation, and oxidation of methionine were considered as fixed and variable modifications respectively.
We also defined a status indicator of persistent or non-persistent HPV infection and these were considered as fixed covariates in analyses.
Several factors relevant to the traits, such as genetic line, measurement date and scorer, were considered as fixed class effects or covariates (e.g. body weight).
We tested significance of treatments according to the model for split-plot design, where year, water, and nitrogen were considered as fixed effects and the random effect was 'Block x water'.
Signals were first log transformed and quantile normalized, before being subjected to mixed model ANOVA, by which rat transgene and age as well as probe were considered as fixed effects and array-id as random.
