BACKGROUND The alcohol biomarker phosphatidylethanol (PEth) comprises a group of ethanol-derived phospholipids formed from phosphatidylcholine by phospholipase D. The PEth molecular species have a common phosphoethanol head group onto which 2 fatty acid moieties are attached. We developed an electrospray ionization (ESI) LC-MS method for qualitative and quantitative measurement of different PEt...

Recently, Wang et al. [IEEE INFOCOM 2011, 820-828], and Nie et al. [IEEE AINA 2014, 591-596] have proposed two schemes for secure outsourcing of linear programming (LP). They did not consider the standard form: minimize cx, subject to Ax = b,x ≥ 0. Instead, they studied a peculiar form: minimize cx, subject to Ax = b,Bx ≥ 0, where B is a non-singular matrix. In this note, we stress that the pro...