Low-tech Bike Shift Lever

low-tech bike shift lever

“I designed this bicycle shift lever after countless complaints from our partner organizations in all parts of the world. Programs that provide bicycles to people who need them for transportation, hauling goods and carrying their children can no longer find shift levers that hold up to hard use. They can choose from ridiculously complex and expensive shifters that are usually integrated with the brake lever or cheap shifters made of plastic and pot metal. Both types wear out within months of daily use and cannot be repaired.” Read more. Thanks to Andrew Eichmann.

Why the Brain Prefers to Read on Paper

“Beyond treating individual letters as physical objects, the human brain may also perceive a text in its entirety as a kind of physical landscape. When we read, we construct a mental representation of the text in which meaning is anchored to structure. The exact nature of such representations remains unclear, but they are likely similar to the mental maps we create of terrain—such as mountains and trails—and of man-made physical spaces, such as apartments and offices.

book 4Both anecdotally and in published studies, people report that when trying to locate a particular piece of written information they often remember where in the text it appeared. We might recall that we passed the red farmhouse near the start of the trail before we started climbing uphill through the forest; in a similar way, we remember that we read about Mr. Darcy rebuffing Elizabeth Bennett on the bottom of the left-hand page in one of the earlier chapters.

In most cases, paper books have more obvious topography than onscreen text. An open paperback presents a reader with two clearly defined domains—the left and right pages—and a total of eight corners with which to orient oneself. A reader can focus on a single page of a paper book without losing sight of the whole text: one can see where the book begins and ends and where one page is in relation to those borders. One can even feel the thickness of the pages read in one hand and pages to be read in the other.

Turning the pages of a paper book is like leaving one footprint after another on the trail—there’s a rhythm to it and a visible record of how far one has traveled. All these features not only make text in a paper book easily navigable, they also make it easier to form a coherent mental map of the text.”

Read more: The Reading Brain in the Digital Age. Picture: This is a Wake Up Call. More books.

Africa Teaches the West How to Build a Car

Smati turtle 1 african car

Today’s cars look like spaceships and are built by robots in futuristic factories. At least, that’s the picture in the developed world.

In Ghana, West Africa, both the cars and the auto industry look rather different. In a neighbourhood called Suame Magazine, an estimated 200,000 artisans take apart discarded western cars and use the parts to build easily repairable vehicles that are suitable for African roads. All this happens manually and in open air.

Artist Melle Smets and researcher Joost van Onna, both from the Netherlands, set up shop in Suame Magazine and built a unique African concept car in collaboration with the local community: the SMATI Turtle 1. Their project calls into question western ways of dealing with technology, waste, employment and automation.

Picture: The SMATI Turtle 1

[Read more…]

Make Your Own $35 Straw Mattress

How to make your own $35 straw mattress. Previously: A mattress that lasts a lifetime.

The Venetian Handcart

venetian handcartGiuliana Fornaciari draws our attention to yet another example of ingenious handcart technology: the Venetian cart.

The vehicle has two small wheels at the end of the horizontal bars, which are used to overcome the steps of Venetian bridges and staircases.

We have said it before: low-tech solutions are by definition local solutions. It is technology that adapts to the environment, not the other way around.

The picture comes from classified ads website Subito; the cart is for sale (199 euro). To be picked up in Venice, obviously.

Three more pictures here, here and here. More sustainable small-scale cargo options.

Carbon-Negative Energy Machines

carbon negative energy machineAll Power Labs makes machines that use an ancient process called gasification to turn out not only carbon-neutral energy, but also a carbon-rich charcoal by-product that just happens to be a fertilizer so efficient that Tom Price, the company’s director of strategic initiatives, calls it “plant crack”.

Gasification, in which dense biomass smoldering — but not combusting — in a low-oxygen environment is converted to hydrogen gas, is nothing new. Price said that ancient cultures used it to enrich their soils, and during World War II, a million vehicles utilized the technology. But after the war, it more or less vanished from the planet, for reasons unknown.

All Power Labs has taken gasification and combined it with two of the
Bay Area’s most valuable commodities — a rich maker culture and
cutting-edge programming skills — to produce what are called
PowerPallets. Feed a bunch of walnut shells or wood chips into these
$27,000 machines and you get fully clean energy at less than 10 cents a
kilowatt hour, a fraction of what other green power sources can cost.

Because there’s no combustion in All Power Labs’ gasification process, the carbon isn’t released into the air.
Rather, it is pulled from the biomass and converted into charcoal. Thanks to gasification and the fact that that charcoal can be put back into the ground, the process of releasing carbon is reversed, Price argued.”

Read more: Carbon-negative energy source a reality, and cheap too. Via Slashdot.