In this paper I explore the potential for viewing education as an “unrestricted communication community” (Habermas 1990: 88), using categorisations from Habermas of different kinds of action as analytical tools for examining educational practices. For the paper, I pursue two main themes: 1) how the concept of communicative action in relation to the three forms of knowledge-constitutive interest...

We report on a numerical investigation of three-dimensional circulation in the Southern Ocean over a domain extending from Antarctica to -36 degrees latitude and from the sea surface to a depth of 500 metres. The high latitude Southern Ocean is a region low in measurements but important for climatic and biological applications. Our investigation is based upon velocity data simulated by a state-...

Equations describing eigenmodes with the frequencies of the order of the geodesic acoustic frequency and the electron/ion diamagnetic frequency in toroidal plasmas are derived and analyzed, a code BOAS solving them is developed. It is shown that there exist drift-sound eigenmodes and new drift-Alfvén eigenmodes. This is done by means of an analytical consideration and numerical modelling of par...

I describe a recent calculation (by me, Hoffmann, Liu, and Schaefer) of the chiral condensate in one-flavor QCD using numerical simulations with overlap fermions. The condensate is extracted by fitting the distribution of low lying eigenmodes of the Dirac operator in sectors of fixed topological charge to the predictions of Random Matrix Theory. Our results are in excellent agreement with estim...

In braneworld collisions fermions originally localised on one brane can be transferred to another brane, or to a space-time boundary. By modelling branes as scalar field kinks we bounce them off boundaries and study resulting effects according to a braneworld observer. Extending on our previous work, we numerically compute the spectrum of excitations of fermion modes localised on the brane and ...

This article studies a situation where a firm outsources production to a distant manufacturer. The firm has two possible freight modes; a slow mode and a fast but more expensive mode. We formulate a dynamic model and use it to analyze how the firm can combine these two freight modes to enjoy the lower cost of the slow mode while using the fast mode as a hedge against cases in which the demand d...

Geometrical disorder is present in many physical situations giving rise to eigenvalue problems. The simplest case of diffusion on a random lattice with fluctuating site connectivities is studied analytically and by exact numerical diagonalizations. Localization of eigenmodes is shown to be induced by geometrical defects, that is sites with abnormally low or large connectivities. We expose a " s...

We give a complete proof of the existence of eigenmodes for a vibrating elliptic membrane: for each pair (m, n) ∈ {0, 1, 2, . . .} there exists a unique even eigenmode with m ellipses and n hyperbola branches as nodal curves and, similarly, for each (m, n) ∈ {0, 1, 2, . . .} × {1, 2, . . .} there exists a unique odd eigenmode with m ellipses and n hyperbola branches as nodal curves. Our result ...

We have performed numerical simulations of weakly and strongly magnetized relativistic jets embedded in a weakly and strongly magnetized stationary or mildly relativistic (0.5c) sheath using the RAISHIN code. In the numerical simulations a jet with Lorentz factor γ = 2.5 is precessed to break the initial equilibrium configuration. Results of the numerical simulations are compared to theoretical...

23  Abstract— The present investigation is concerned with effect of rotation on the wave propagation of generalized thermoelastic diffusion with one relaxation time. The exact expressions for temperature, the displacement components, stress components, chemical potential and concentration are obtained and represented graphically. Numerical computations are carried out and are obtained by using...