We show that the atmospheric and magnetic height variations are coupled in all magnetohydrostatic (MHS) equilibria with gravity if any isolated weak evacuated flux tubes or hydrostatically connected non-force-free fields are present. In gas-dominated regimes, as in stellar photospheres, flux tubes expand with height to maintain pressure balance with the ambient giving a ‘magnetic canopy’ in the...

We present a numerical investigation of dead, or relic, radio galaxies and the environmental impact that radio galaxy activity has on the host galaxy or galaxy cluster. We perform axisymmetric hydrodynamical calculations of light, supersonic, back-to-back jets propagating in a β-model galaxy/cluster atmosphere. We then shut down the jet activity and let the resulting structure evolve passively....

An investigation of tidal oscillations in the earth’s atmosphere has been made using an 18 vertical level, hemispheric general circulation model. This approach permitted these tides to be investigated without resorting to linearization of the governing differential equations, as is required by the conventional approach. In addition, it allows the tides to be studied in relation to a realistic a...

one way to increase the shelf life of agriculture products is using of controlled atmosphere storages. in order to obtain the controlled gas components, an equipped cold store with cooling system and atmosphere controller system designed and constructed. the injection of co2, o2 and n2 were controlled automatically into the store by programable logic control (plc). the store was a laboratory re...