In using key texts of Marx and Engels against all dogmatic schools of Marxism, Adolfo Sánchez Vázquez accomplished a major theoretical shift by revalidating ‘modern art’ from within the Marxist tradition, so that ‘socialist pluralism’, and not any single doctrine of ‘social realism’, seemed most consistent with the vantage point of Marx. Sánchez Vázquez wrote significant art criticism about the murals of Diego Rivera in which he deftly applied his concept of non-normative Marxism. Remaining focused on Rivera, in this article Sánchez Vázquez concentrates on the characteristics and deliberates the roles of political art. The author examines how and why Rivera's artwork is political in nature and cites a diverse range of evidence to make his point. Sánchez Vázquez also evaluates the aesthetic quality of Rivera's work and makes connections between the Mexican artist and Pablo Picasso, Francisco Goya, Eugène Delacroix and Honoré Daumier.

Home furnishings retailer IKEA has completed installation of its fourth biogas-powered fuel cell system, a 200 kW solid oxide power plant supplied by Bloom Energy, at its store in San Diego, California.

Home furnishings retailer IKEA has completed installation of its fourth biogas-powered fuel cell system, a 200 kW solid oxide power plant supplied by Bloom Energy, at its store in San Diego, California.

A modeling and field study was conducted to better understand the hydrodynamic characteristics of the Diego Garcia Lagoon. The study included model data comparisons for several key variables, including water surface elevation, currents, salinity, and temperature. The predictive capability of the hydrodynamic Environmental Fluid Dynamics Code (EFDC) model was applied to prediction of flushing time and vertical mixing characteristics of the different regions of the lagoon. It was estimated that only 3.5% of the total discharge mass ends up to the bottom layer for the continuous discharge scenario for a surface discharge. If discharge were to take place only during slack high tide, which conceptually would tend to flush out of the lagoon by the subsequent ebbing tide, only 2.4% of the total discharge mass ends up to the bottom layer, a reduction of 1% of the total discharge mass from the continuous discharge scenario. For releases to the surface water of the outer lagoon, strong tidal flushing tends to disperse and discharge the majority of the mass release prior to completeing vertical mixing.