Abstract The generalizations of rough sets based on topological structures have become the hot topic set theory. In present article, notion $$j$$ j -neighborhood space and related concept -simply open sets, three new methods for generalizing Pawlak are proposed their properties studied. These compared with so...

Internet development holds the promise of transmitting economic value across physical space at zero marginal cost. In such a “weightless economy”, what factors matter for the location of economic activity and thus for economic development? This paper sketches a model of spatial dynamics over a three-dimensional globe, where transportation costs don’t matter. The paper develops conditions under ...

This study assessed the effect of soil amendment with biochar on production some Mediterranean crops. Pine-derived (B1) and partially pyrolyzed pine-derived (B2) were used a dose 8 L/m2 in corn crop, reporting increase 38–270% over three years B1, no B2 due to its poor quality. Olive stone-derived (B3) was lavandin vineyard crops doses 0.04–0.9 0.37–2.55 L/m2, respectively. An 23–25% plant volu...

Amidst the continuing controversy over American economic development incentives, this article looks at three key effectiveness issues: Do economic development incentives encourage new investment and employment? Are these incentives targeted at economically depressed areas or economically depressed people? How costly are these incentives? For all these questions, our findings come out against tr...

Today’s global social-political environment leads many to elevate entrepreneurship as a vehicle facilitating economic development. Even though different regions have similar new firm formation rates, there is a variation in terms of the contribution to economic development. Building on the resource based-view and Hofestede’s cultural dimensions, this paper proposes three factor view of the qual...