Learn about currency substitution, its types, benefits, and potential risks, and why some countries use foreign currencies for extra stability and economic advantage.

Discover how the substitution effect impacts consumers and businesses. Learn how price changes influence spending habits and choice, revealing both benefits and drawbacks.

Numberphile revived an ancient multiplication trick—halves and doubles—also called Egyptian or Russian math, where you repeatedly halve one number and double the other. After crossing out rows with ...

If you’re not sure how to wrap a present, there’s an easy hack you can try. The clever trick—wrap diagonally, not horizontally or vertically—is based in math. Basic geometric principles explain how it ...

Abstract: Considering the dynamic adjustment of the project portfolio is an important measure to ensure the realization of strategic objectives. The existing research only analyzes the role of ...

This paper proposes a novel method to calculate the best installed capacity of pumped storage power station. First, we choose the day with maximum load as the typical day for every month and simulate ...

Abstract: In order to enhance the efficiency of dynamics modeling of modular space manipulator, a kind of efficient modeling method based on Space Operator Algebra is proposed in this paper. The ...