Archives for October 2016

Vertical Walking

vertical-walking-stairs“Even as our cities get more crowded and its buildings get taller, it seems that we have yet to find a more energy efficient way to navigate this high-rise environment. Right now, our options are limited to stairs, escalators, and elevators—all of which are expensive, require constant maintenance, and take up a lot of space.

Enter Rombout Labs and their concept of “vertical walking.” Their technology is designed to allow humans to move between building floors without the need for any sort of power supply, also using less effort than we would if we were using stairs, and making optimal use of available vertical space.

“By using harmonious movements and smart materials, only 10% of the effort of walking stairs is needed to bridge multiple floors. This not only provides a solution for the growing number of people who are unable to take stairs, but moreover offers new possibilities for urban architecture,” they explain on the Dutch Design Week website, where the system is currently featured.”

See & read more: New Futuristic Prototype Replaces Stairs and Elevators for ‘Vertical Walking’.

October 29, 2016 by kris de decker Filed Under: Human power

Pigeon Towers: A Low-tech Alternative to Synthetic Fertilizers

pigeon-towers-iranPhoto credit: Bekleyen, A. (2009). The dovecotes of Diyarbakır: the surviving examples of a fading tradition. The Journal of Architecture, 14(4), 451-464..

Many societies, ancient and contemporary, have innovated ways of supplying their fields with fixed nitrogen and phosphorus—two crucial ingredients for crop productivity. One is crop rotation, which alternates nitrogen-fixing and nitrogen-exhausting crops. Farmers around the world make use of chickens, ducks, and geese to add “fresh” guano to their fields. Cattle manure is another useful alternative—although it often lacks in phosphorus. Much more labor intensive than simply adding fossil-fuel derived synthetic fertilizer, these practices tend to build up soil, limit greenhouse gas emissions, and lead to less run-off into rivers, lakes, and oceans.

Persian pigeon towers are one of the more elegant solutions to the nitrogen-phosphorus problem. These are essentially castles built for thousands of wild pigeons, strategically placed in the middle of the fields. Their droppings were shoveled up once a year and sold to nearby farmers. While most pigeon towers existing today are in disrepair, the oldest still standing are dated to the 16th century (but they are assumed to have existed over 1,000 years ago) and helped fuel the cultivation of Persia’s legendary orchards, melons, and wheat production.[1] [Read more…]

October 25, 2016 by kris de decker Filed Under: Aviation, Farming, Gardening, History, Random