The present study focuses on investigating the bifurcation characteristics of a pitch–plunge aeroelastic system possessing coupled non-smooth nonlinearities, both in structural and aerodynamic fronts. To this end, freeplay nonlinearity is considered stiffness pitch degree-of-freedom. effects dynamic stall arising due to large instantaneous angles-of-attackare incorporated using semi-empirical L...

Previous literature has explored how factors such as maturation, attachment style, and security influence children’s freeplay behavior. The present study investigates a previously unexplored factor: peer presence. This is an important consideration because much of children’s play and early learning occurs in a social context with siblings and friends. We tested children (ages 2 to 11) from two ...

The goal of this multi-method study was to examine how child gender and coparenting processes influence associations between family stress and toddlers' social adjustment. The participants, 104 dual-earner couples and their 2-year-old children, were videotaped in their home during a freeplay activity. Mothers and fathers completed questionnaires about stress in their roles as partners, workers,...

This paper reports on the use of the construction toy LEGO as an effective learning resource for undergraduate classes in the psychology of creativity. Students first attended a short series of lectures on aspects of creativity, including learner characteristics such as motivation and metacognition, and theoretical approaches to problem-finding and problem-solving including the Geneplore model ...

Under the right parameters, flutter occurs in an airfoil when aerodynamic forces drive a dynamic structure to an oscillatory, possibly divergent condition. The presence of a rotational stiffness nonlinearity at the root of an all-moving airfoil has been shown to decrease the freestream velocity at which flutter occurs. Since this is a somewhat common configuration for flight structures and othe...