During the day, there are considerable variations in the climatic factors prevailing in these regions. This is especially so during the 24-hour daily cycle of the long, hot and dry summer (mid-May to midOctober). Such climatic conditions have had a considerable impact on the daily living pattern...

The climatic conditions prevailing in the regions of the hot-dry climates have had a direct and distinct impact on the pattern of family living activities, particularly in the urban areas; here, the indigenous courtyard houses have been developed over the years by a process of trial and error to...

We give a survey of how computer algebra can be used to help the mathematician to guess results and to prove theorems in homological algebra. Our main point is that the Poincaré-Betti series of a commutative graded algebra contains much deeper information and is harder to calculate than the...