Phenomenological implications of the anomalous baryon current in the Standard Model are discussed, in particular neutrino-photon interactions at finite baryon density. A pedagogical derivation of the baryon current anomaly is given.

Socio-Cultural Theory, based on Vygotskian thought, is a theory about the development of human cognitive and higher mental function. The theory specially emphasizes the integration of social, cultural and biological elements in learning processes and stresses the socio-cultural circumstances‘ central role in human‘s cognitive development. Second Language Acquisition is concerned with the proces...

The rise of social collaboration technologies, collectively called Web 2.0 (O'Reilly 2005), and corresponding changes in the skills and preferences of students have posed fundamental challenges for institutions and educators. With their ability to engage learners as potential creators and active participants in the learning process, Web 2.0 technologies offer the potential to improve significan...

Describing digital technologies as tool, tutor, environment or resource in pedagogical contexts is common, and this paper examines the metaphorical nature of these descriptions and their implications for digitally-based teaching and learning practices. To compare the metaphors, the paper first develops a model of pedagogy derived from Activity Theory. It explores the implications of these metap...

Much of learning and reasoning occurs in pedagogical situations--situations in which a person who knows a concept chooses examples for the purpose of helping a learner acquire the concept. We introduce a model of teaching and learning in pedagogical settings that predicts which examples teachers should choose and what learners should infer given a teacher's examples. We present three experiment...

language learning strategies have been controversial ever since rubin’s (1975) landmark article more that 30 years ago. to this day, there is no consensus regarding exactly what a strategy is, which has impeded research initiatives and at times threatened the validity of research findings. the relationship between strategies and successful language learning has also been questioned. based on th...