A study with six middle school teachers on the notion of variation in the task of prediction is hereby presented. The SOLO hierarchy in which notions like randomness, structure and variation are included is applied. Variation related activities used in this study arise from the questions used in research on statistical variation but were also adapted to include computer simulation. The notion o...

We present a sensitivity study approach to evaluate the effects of interconnect variations on the performance of large, complicated circuits. The approach uses highly efficient designed experiments. The results from the study of a multiplier circuit are presented as an example. 1.0 Introduction TodayÆs submicron circuits require a sensitivity study of interconnect variation on circuit performan...

I present a novel parametric approach for estimating the likelihood of homogeneously textured images. I propose that the dependence between pixel features is usefully captured by estimating the joint intra-class variation of their marginal distributions. To support this claim I build a single multivariate Gaussian distribution for each class that estimates the joint variation of several margina...

The levator ani is vulnerable to injury during childbirth and effective surgical intervention requires full knowledge of the morphology and mechanical properties of the muscle structure. The shape of the levator ani and regional thickening during different levels of physiological loading can provide an indication of pelvic floor dysfunction. This paper describes a coupled approach for shape and...

The basis for traditional “statistical inference” is the assumption of statistical stability. However, observations indicate that this assumption is often incorrect and has significant limitations for the study of skin and hair systems. This paper focuses on the use of analytic statistical analysis versus enumerative statistical analysis for evaluating data from experiments and product studies....