this article has attempted to present a clear image of science production by the member states of the organization of islamic conference (oic) based on the essential science indicators (esi). esi indexes the most effective science productions of the world. the world bank, on the other hand, has classified the countries of the world according to their economic position. using the information acc...

In recent years dozens of nations have begun exporting software products and services. We label these nations the “new software exporting nations”. We introduce a four-tier taxonomy of software exporting nations. Thresholds for the tiers are defined by export revenues, by cluster size, and by maturity. Tier 1 nations are the major software exporting nations; Tier 2 nations are the transition so...

Termites are the most important soil fauna in the Sahelian zone of Africa, intensely interacting with the soil. Both the biotic and abiotic state of the soil affect the termite population and activity. The construction by termites of nests, gallery systems or sheetings from soil or from a mixture of soil and other material within the soil horizons or on the soil surface affect the physical and ...