OBJECTIVE To assess the validity of nutrient profiling Model WXYfm - developed for the purpose of regulating the promotion of 'less healthy' foods to children. The model ranks foods according to their healthiness and categorises foods into 'healthier' and 'less healthy' foods. DESIGN Convergent and discriminant validity was tested by comparing the way Model WXYfm categorises foods with the wa...

Validating simulated predictions of internal damage within armor ceramics is preferable to simply assessing a model s ability to predict penetration depth, especially if one hopes to perform subsequent ‘‘second strike’’ analyses. We present the results of a study in which crack networks are seeded by using a statistically perturbed strength, the median of which is inherited from a deterministic...