3 research outputs found
Zero to eight : young children and their internet use
EU Kids Online has spent seven years
investigating 9-16 year olds’ engagement with
the internet, focusing on the benefits and risks
of children’s internet use. While this meant
examining the experiences of much younger
children than had been researched before EU
Kids Online began its work in 2006, there is
now a critical need for information about the
internet-related behaviours of 0-8 year olds.
EU Kids Online’s research shows that children
are now going online at a younger and
younger age, and that young children’s “lack
of technical, critical and social skills may pose
[a greater] risk” (Livingstone et al, 2011, p. 3).peer-reviewe
Alpha Variant Selection Determined from Grain Misorientations in Ti-6Al-7Nb Alloy with a Duplex Microstructure
Titanium occurs in two structures; a high temperature body-centered cubic structure which is known as β phase and an ambient temperature α phase which has the hexagonal closed-packed structure. In the present study a biomedical Ti-6Al-7Nb alloy was investigated. The so-called duplex structure consisting of α lamellae and equiaxed primary α-grains was prepared by a thermal treatment. The α lamellae are created during cooling from a β-field according to the Burgers relation. This relation allows the formation of the α lamellae with different crystallographic orientations - so-called variants. The preferential misorientation between α lamellae was studied by a detailed electron backscattered diffraction analysis. The misorientation of grains in the duplex structure was modelled by a sum of random Mackenzie distribution and Gaussian peaks related to the preferred misorientations according to the Burgers relation. The preferred misorientations based on the Burgers relationship were identified in the biomedical Ti-6Al-7Nb alloy with duplex structure. It is confirmed that the variant selection of α lamellae is not random