Power supply: Understanding unstable grids

A sustainable energy supply requires the expansion of power grids. However, new transmission lines can also lead to grids becoming more unstable rather than more stable, as would be expected. This phenomenon is referred to as the Braess paradox. Resear…

Good planning gets the bike rolling

Turning it downside up: Novel, network-dynamic planning approach for urban bike path infrastructure enables demand-driven design of cycling networks by reversing the usual approach. The new concept could improve the bike-friendliness of cities — and t…

The costs of caring for a graying population

Researchers have found considerable variations in per-capita spending on long-term care across Japan’s municipalities. They identified the drivers of regional variation in per-capita spending on long-term care using regression analysis. Demand-related …