Design narratives: an intuitive scientific form for capturing design knowledge in education

This paper provides a brief introduction to design-based research in education, its rationale and principles. It then highlights some of the challenges in reporting on design research, and proposes design narratives as a suitable form to address these challenges. Design narratives are characterized as a form of scientific discourse, and guidelines are proposed for their construction

On Classical Teleportation and Classical Nonlocality

An interesting protocol for classical teleportation of an unknown classical state was recently suggested by Cohen, and by Gour and Meyer. In that protocol, Bob can sample from a probability distribution P that is given to Alice, even if Alice has absolutely no knowledge about P. Pursuing a similar line of thought, we suggest here a limited form of nonlocality - "classical nonlocality". Our nonlocality is the (somewhat limited) classical analogue of the Hughston-Jozsa-Wootters (HJW) quantum nonlocality. The HJW nonlocality tells us how, for a given density matrix rho, Alice can generate any rho-ensemble on the North Star. This is done using surprisingly few resources - one shared entangled state (prepared in advance), one generalized quantum measurement, and no communication. Similarly, our classical nonlocality presents how, for a given probability distribution P, Alice can generate any P-ensemble on the North Star, using only one correlated state (prepared in advance), one (generalized) classical measurement, and no communication. It is important to clarify that while the classical teleportation and the classical non-locality protocols are probably rather insignificant from a classical information processing point of view, they significantly contribute to our understanding of what exactly is quantum in their well established and highly famous quantum analogues.Comment: 8 pages, Version 2 is using the term "quantum remote steering" to describe HJW idea, and "classical remote steering" is the main new result of this current paper. Version 2 also has an additional citation (to Gisin's 89 paper

Comment on "Semiquantum-key distribution using less than four quantum states"

Comment on Phys. Rev. A 79, 052312 (2009), http://pra.aps.org/abstract/PRA/v79/i5/e05231