Bishop's University

About: Bishop's University is a education organization based out in Sherbrooke, Quebec, Canada. It is known for research contribution in the topics: Population & General relativity. The organization has 554 authors who have published 1511 publications receiving 31512 citations. The organization is also known as: Université Bishop's.

f ( R ) theories of gravity

Abstract: Modified gravity theories have received increased attention lately due to combined motivation coming from high-energy physics, cosmology, and astrophysics. Among numerous alternatives to Einstein's theory of gravity, theories that include higher-order curvature invariants, and specifically the particular class of $f(R)$ theories, have a long history. In the last five years there has been a new stimulus for their study, leading to a number of interesting results. Here $f(R)$ theories of gravity are reviewed in an attempt to comprehensively present their most important aspects and cover the largest possible portion of the relevant literature. All known formalisms are presented---metric, Palatini, and metric affine---and the following topics are discussed: motivation; actions, field equations, and theoretical aspects; equivalence with other theories; cosmological aspects and constraints; viability criteria; and astrophysical applications.

Understanding teacher identity: an overview of issues in the literature and implications for teacher education

Abstract: While literature on teaching emphasizes the importance of identity in teacher development, understanding identity and the issues related to it can be a challenging endeavour. This article provides an overview of the issues revealed in recent discussions of teacher identity: the problem of defining the concept; the place of the self, and related issues of agency, emotion, narrative and discourse; the role of reflection; and the influence of contextual factors. A particular focus is placed on identity in pre‐service teachers and new practitioners. Implications of an understanding of these issues for programmes of teacher education are highlighted.

Learning 10,000 pictures.

Abstract: Four experiments are reported which examined memory capacity and retrieval speed for pictures and for words. Single-trial learning tasks were employed throughout, with memory performance assessed by forced-choice recognition, recall measures or choice reaction-time tasks. The main experimental findings were: (1) memory capacity, as a function of the amount of material presented, follows a general power law with a characteristic exponent for each task; (2) pictorial material obeys this power law and shows an overall superiority to verbal material. The capacity of recognition memory for pictures is almost limitless, when measured under appropriate conditions; (3) when the recognition task is made harder by using more alternatives, memory capacity stays constant and the superiority of pictures is maintained; (4) picture memory also exceeds verbal memory in terms of verbal recall; comparable recognition/recall ratios are obtained for pictures, words and nonsense syllables; (5) verbal memory shows a higher ret...

Interaction in Distance Education and Online Learning: Using Evidence and Theory to Improve Practice

Abstract: In a recent meta-analysis of distance and online learning, Bernard et al. (2009) quantitatively verified the importance of three types of interaction: among students, between the instructor and students, and between students and course content. In this paper we explore these findings further, discuss methodological issues in research and suggest how these results may foster instructional improvement. We highlight several evidence-based approaches that may be useful in the next generation of distance and online learning. These include principles and applications stemming from the theories of self-regulation and multimedia learning, research-based motivational principles and collaborative learning principles. We also discuss the pedagogical challenges inherent in distance and online learning that need to be considered in instructional design and software development.