The Traces of a Radical Education Neoliberal Rationality in Sudbury Student Imaginings of Educational Opportunities

The case of Sudbury education, a progressive school model that originated in the United States in 1968, demonstrates how pedagogy can be reimagined toward radically empowering children. Sudbury schools project an idealistic vision of individual self-actualization, self-directed learning, and egalitarian democratic participation in an unstructured pedagogical environment. This article draws on ethnographic narratives of students who have experienced Sudbury education to trace a more complex and contradictory reality of Sudbury socialization. Focusing on the case study of Natalie, a lifelong Sudbury student who transitioned to public school at the age of 15, what emerges is a narrative of self and society imbued with neoliberal discourses of self-motivation, entrepreneurship, and individualistic notions of success, punctuated by brief structural critiques of public schooling. The overwhelmingly individualistic consequences of Natalie\u27s socialization, however, showcase the limits of Sudbury education to promote a collective sense of social responsibility

The surface chemistry of nanocrystalline MgO catalysts for FAME production:an in situ XPS study of H2O, CH3OH and CH3OAc adsorption

An in situ XPS study of water, methanol and methyl acetate adsorption over as-synthesised and calcined MgO nanocatalysts is reported with a view to gaining insight into the surface adsorption of key components relevant to fatty acid methyl esters (biodiesel) production during the transesterification of triglycerides with methanol. High temperature calcined NanoMgO-700 adsorbed all three species more readily than the parent material due to the higher density of electron-rich (111) and (110) facets exposed over the larger crystallites. Water and methanol chemisorb over the NanoMgO-700 through the conversion of surface O2 − sites to OH− and coincident creation of Mg-OH or Mg-OCH3 moieties respectively. A model is proposed in which the dissociative chemisorption of methanol occurs preferentially over defect and edge sites of NanoMgO-700, with higher methanol coverages resulting in physisorption over weakly basic (100) facets. Methyl acetate undergoes more complex surface chemistry over NanoMgO-700, with C–H dissociation and ester cleavage forming surface hydroxyl and acetate species even at extremely low coverages, indicative of preferential adsorption at defects. Comparison of C 1s spectra with spent catalysts from tributyrin transesterification suggest that ester hydrolysis plays a key factor in the deactivation of MgO catalysts for biodiesel production

Inward propagating chemical waves in Taylor vortices

Advection-reaction-diffusion (ARD) waves in the Belousov-Zhabotinsky reaction in steady Taylor-Couette vortices have been visualized using magnetic-resonance imaging and simulated using an adapted Oregonator model. We show how propagating wave behavior depends on the ratio of advective, chemical and diffusive time scales. In simulations, inward propagating spiral flamelets are observed at high Damköhler number (Da). At low Da, the reaction distributes itself over several vortices and then propagates inwards as contracting ring pulses—also observed experimentally

STABILIZING EFFECTS OF OXIDE ADDITIONS TO URANIUM OXIDE

An investigation of the stabilizing influence of oxide additions to uranium oxide was continued. These additions are employed to eliminate the phase transformation to U/sub 3/O?sub 8/ which occurs when UO/sub 2/ is exposed to an oxidizing environment at elevated temperatures and to reduce the volatility or transpiration losses of uranium oxide which become appreciable in air at temperatures in excess of 1200 deg C. The results show that CaO may be successfully employed in partial substitution for La/sub 2/O/sub 3/ and Y/sub 2/O/ sub 3/. The resulting solid solutions exhibited high-temperature stability comparable to that of the "binary" solid solutions of UO/sub 2/ containing La/sub 2/O/sub 3/ or Y/sub 2/O/sub 3/. On the basis of thes e and other results some alternative approaches appear possible to reduce the amount and cross section of additive required for stabilization. (auth

The Thirring interaction in the two-dimensional axial-current-pseudoscalar derivative coupling model

The authors reexamine the two-dimensional model of massive fermions interacting with a massless pseudoscalar field via axial-current-pseudoscalar derivative coupling. Performing a canonical field transformation on the Bose field algebra the model is mapped into the Thirring model with an additional vector-current-scalar-derivative interaction (Schroer-Thirring model). The complete bosonized version of the model is presented. The bosonized composite operators of the quantum Hamiltonian are obtained as the leading operators in the Wilson short distance expansion.Comment: 13 page