Having posterior cortical atrophy (PCA) is challenging, that’s for sure. You might have awful brain fog for hours, days, weeks, where you can’t think clearly. You become exhausted from the visual and ...

The Annals of Statistics, Vol. 43, No. 3 (June 2015), pp. 1300-1322 (23 pages) Estimating the leading principal components of data, assuming they are sparse, is a central task in modern ...

The Federal Board of Revenue (FBR) is facing serious problems in the implementation of one of their major reform projects, the Post Clearance Audit (PCA) of importers in Karachi and Lahore. Sources ...