Evaluating marketing opportunities for haricot beans in Ethiopia

This market report was undertaken to evaluate the marketing opportunities and constraints for beans in Ethiopia, to gain insight into the demand and supply of this crop and the medium and long-term market outlook across the subsector for national, regional and international trade. Major fi ndings are summarized with recommendations made in the form of suggested ways forward. The paper is organized as follows. Section 2 presents the research methodology, section 3 describes bean types, section 4 provides an overview of the production systems, section 5 deals with marketing issues, section 6 focuses on the demand for beans in Ethiopia, section 7 deals with the major supply channels, section 8 provides major fi ndings, and section 9 provides recommendations for interventions

Asymmetric Gaussian steering: when Alice and Bob disagree

Asymmetric steering is an effect whereby an inseparable bipartite system can be found to be described by either quantum mechanics or local hidden variable theories depending on which one of Alice or Bob makes the required measurements. We show that, even with an inseparable bipartite system, situations can arise where Gaussian measurements on one half are not sufficient to answer the fundamental question of which theory gives an adequate description and the whole system must be considered. This phenomenon is possible because of an asymmetry in the definition of the original Einstein-Podolsky-Rosen paradox and in this article we show theoretically that it may be demonstrated, at least in the case where Alice and Bob can only make Gaussian measurements, using the intracavity nonlinear coupler.Comment: 5 Pages, 4 Figure

Uses and Potentials of Wikis in the Classroom

As Prensky (2001) observes, "Our students have changed radically. Today's students are no longer the people our educational system was designed to teach " (1). Prensky sees today's students as digital natives while most of today's teachers remain digital immigrants. In particular, today's educators are acculturated to a print paradigm while students are increasingly products of a digitally-based secondary-oral paradigm. Happily for educators, electronic and cyber technologies can potentially combine the best aspects of both print and secondary-oral paradigms, allowing educators to move freely across the print-oral continuum. One cyber technology enabling this movement is the wiki, a unique interface where information is not fixed (as in a print model) but fluid and flexible to meet the needs of the community (as in the pre-literate age). In this article we describe how teaching and learning have changed across oral, print, and secondary-oral paradigms; in turn, after addressing some controversies over the use of wikis as scholarly and educational resources, we advocate the use of wikis as a teaching and learning tool. Technology and Learning Paradigms As technologies have changed through the millennia, so have teaching methods. From the one-to-one oral teaching style of the early agrarian age (pre-writing and pre-printing cultures) to the apprenticeship system and one-to-many lectures of the pre-industrial ages (writing and print cultures), teaching was predominantl