The goal of this lecture is to explain to the general mathematical audience the connection that was discovered in the last 20 or so years between the Aubry-Mather theory of Lagrangian systems, due independently to Aubry and Mather in low dimension, and to Mather in higher dimension, and the theory of viscosity solutions of the Hamilton-Jacobi equation, due to Crandall and Lions, and more precis...

OBJECTIVES To survey the attitudes and practices of Australian neonatal nurses in the use of kangaroo care (KC) and identify possible concerns with promoting KC in the neonatal intensive care unit (NICU). DESIGN A two-phase research approach was used that included a descriptive survey followed by in-depth interviews with a subset of survey respondents. SAMPLE Thirty four nurses working in t...