7 research outputs found
Teacher-child interaction in the teaching of reading: a review of research perspectives over twenty-five years
This is the pre-peer reviewed version of the following article 'Teacher-child interaction in the teaching of reading: a review of research perspectives over twenty-five years' Journal of Research in Reading 28(1) pp.15-27, which has been published in final form at http://www3.interscience.wiley.com/journal/118693931/issue.Taking as a starting point a paper published in 1981, this paper considers the importance of interaction between teacher and pupil in learning to read. Twenty-five years ago, the study of classroom language was relatively new. Research perspectives have moved from describing the process of interaction between teacher and child to considering the outcomes. At the same time a greater awareness of the sociocultural nature of language and classrooms has developed. An enduring theme in research from a variety of perspectives has been the call for more extended opportunities for exchanges about texts and more reciprocity in teacher-child dialogue. Studies of classroom practice, however, evidence persistence in the use of triadic dialogue in which the teacher controls the interaction and effectively closes down discussion. Despite initiatives calling for high-quality interaction, it is argued here that there is still no agreement about what high-quality interaction should look like
Thermally Stable Nanocrystalline Steel
Two novel nanocrystalline steels were designed to withstand elevated temperatures without catastrophic microstructural changes. In the most successful alloy, a large quantity of nickel was added to stabilize austenite and allow a reduction in the carbon content. A 50 kg cast of the novel alloy was produced and used to verify the formation of nanocrystalline bainite. Synchrotron X-ray diffractometry using in situ heating showed that austenite was able to survive more than 1 hour at 773 K (500 Ëš\u9aC) and subsequent cooling to ambient temperature. This is the first reported nanocrystalline steel with high-temperature capability.QC 20180604</p