There are about 30 low-fertility countries globally. Germany has been a low-fertility country for more than 50 years which is longer than any other country since the lowfertility trend in other countries only began ten or twenty years ago. Low-fertility rates have mainly negative consequences...

The electricity grid includes multiple network areas managed by different operators, with transmission system operators (TSOs) handling high-voltage areas and distribution system operators managing midto low-voltage areas. These areas are interconnected and synchronized, creating classical...