This phenomenon, also commonly termed undersampling, typically occurs when the pixels in the digitizer are spaced too far apart compared to the high-frequency detail present in the image.
Spatial average updates as new stations were surveyed would have also answered the "undersampling" issue that Watts is supposedly concerned about. ❋ EliRabett (2010)
I really think that these polls are undersampling the huge pockets of Socialism in places like Danville, Culpeper, Wytheville, and Bristol. ❋ Unknown (2008)
For this argument to work you have either to show that the national polls are undersampling those in that age range or that those in that age range are going to come out in larger numbers than they have in the past. ❋ Unknown (2009)
My guess is the polls are drastically undersampling two significant groups of people -- younger, college-aged voters who don't have land lines and independent cross-over folks who haven't voted before or in a long time and thus don't make the radar as a "likely voter". ❋ Unknown (2009)
Wang, Briffa, Mann, and all their derivative research has been largely discredited for falsifying records, undersampling and concealing data, and just bad math, respectively. ❋ Unknown (2009)
Meanwhile, undersampling of young people because of landline biasing likely skews results towards the Republicans. ❋ Ann Althouse (2008)
Oversampling and undersampling can compromise accuracy of polling data. ❋ Unknown (2008)
You also have the undersampling problem where high frequencies are interpreted as low frequencies if they are sampled at less than 2X the high frequency. ❋ Unknown (2007)
Speaking of undersampling, it would have been good to look at the breakdown of common substrates of DD-peptidyl ligases and beta lactamases, such as m-[[phenylacetyl-glycyl]oxy]benzoic acid and see what the muations did to these activities. ❋ Unknown (2007)
This discrepancy probably results from undersampling (and general lack of knowledge) of habitat throughout the pitta's range. ❋ Unknown (2007)
Kodera 1993 showed by examining running correlations that undersampling is not the origin of the Labitzke/van Loon oscillations. ❋ Unknown (2007)
Some authors have questions the usefulness of solar-cycle correlation studies noting that undersampling and/or aliasing of other periodic atmospheric phenomena could lead to spurious results Teitelbaum and Bauer 1990, Salby and Shea 1991, Dunkerton and Baldwin 1992⤮ ❋ Unknown (2007)
MMO players, so there is an issue where we don't really know for sure whether we are severely undersampling very casual players. ❋ Unknown (2007)
RMS allows undersampling of IF frequencies with excellent noise performance. ❋ Unknown (2010)
Specimens containing regularly spaced, repetitive patterns often exhibit moiré fringes that result from aliasing artifacts induced by undersampling.
