Background: Depression is one of the major public health problems, which occurs twice as often in women than men during fertile period. or anxiety pregnancy, stress from recent life events, a lack social support, and history prior depression are all good predictors postpartum depression. Providing expert breastfeeding support to who plan breastfeed critical, providing caring want but unable do ...

most of the materials used in the industry of aero-engine components generally consist of titaniumalloys. advanced materials, because of their excellent combination of high specific strength, lightweight and general corrosion resistance. in fact, chemical wear resistance of aero-engine alloyprovides a serious challenge for cutting tool material during the machining process. the reductionin cutt...