A linear Fresnel concentrating solar device was developed and its performance was studied. Various combinations of reflecting mirrors were tried to achieve the temperature at focus. A tubular absorber made from aluminium pipe (0.075 m diameter and 0.53 m long) filled with Hytherm-500 oil was...

Integrable evolution equations can take several equivalent forms in a geometrical sense. Here we consider the equivalence of generalized versions involving linear inhomogeneities of three important nonlinear evolution equations, namely the Hirota, Heisenberg ferromagnetic spin and...

This paper has the objective of improving on the issue of forecasting new housing construction, and highlights differences between space demand and investment demand in housing markets. Further, it indicates how these differences will affect construction decisions. The first step is to identify...