Cognitive development is a process from an initial knowledge state at birth to a later mature one. The problem of developmental psychology is to describe and explain the intricacies of this process. In “The Scientist in the Crib”, Alison Gopnik, Andrew N. Meltzoff and Patricia K. Kuhl approach this problem from the perspective of one theory in developmental psychology — the theory theory. The b...

We report on experimental studies of spatio-temporally heterogeneous stickslip motions in the sliding friction between a hard polymethyl methacrylate (PMMA, plexiglass) block and a soft poly-dimethyl siloxane (PDMS, silicone) gel plate. We perform experiments on two PDMS gels with different viscoelastic properties. For the less viscous gel, large and rapid events are preceded by an alternation ...

Abstract Artifacts often affect seismic catalogs. Among them, the presence of man-made contaminations such as quarry blasts and explosions is a well-known problem. Using contaminated dataset reduces statistical significance results can lead to erroneous conclusions, thus removal nonnatural events should be first step for data analyst. Blasts misclassified natural earthquakes, indeed, may artifi...