second order fundamental magnitudesecond order polynomial functionsecond partialsecond partial testsecond permutation representationsecond principl linesecond projectionsecond projection linesecond quadrantsecond samplesecond sidesecond side of equalitysecond side of the equalitysecond state injectionsecondarysecondary availability curvesecondary constriaintssecondary coolingsecondary relationssecondary storagesecondlyseconod order interactionssectionsection of a finite groupsection of a polyhedral anglesectionalsectionallysectionally continuous functionsectionally smoothsectorsector of a circlesector plansector targetsecular equationsecular trendsecurityseeseeksegmentsegment in an ordered setsegment of a circlesegment of a curvesegment of a linesegment of a spheresegmentalsegmentarysegmentationsegmented chipsegnificance levelsegnificance probability