Appropriate Technology Publications Online

Engineering for change (E4C) reports about the publication of two new peer-reviewed journals dedicated to the use of technology in developing countries. Both are freely accessible online and may be of interest to Low-tech and No Tech Magazine readers.

ASME-DEMANDDemand, a publication of the American Society of Mechanical Engineers (ASME), was launched in December 2013. It mixes case studies, stories and original reports from leaders in the sector’s fields. In the first edition, the US engineering professors Nathan Johnson at Arizona State University and Kenneth Bryden at Iowa State University place pieces in the unused cookstove puzzle with their own research in rural Mali. Other notable topics include low-cost and rugged wheelchair design, remote sensors for project evaluation, smokehoods reimagined to fight indoor air pollution and funding for social innovators. Read more about the launch of the new magazine.

The Journal of Humanitarian Engineering (JHE) was launched in May 2012. Two volumes have been published so far, and a third is on the way. The magazine, which is published by the Engineers Without Borders Institute in Melbourne, Australia, presents outcomes of research and field experiences at the intersection of technology and community development. “One of the wishes we’ve heard from experts in humanitarian design and engineering is for academia to keep pace with the rising interest in the field. Appropriate technology design and the invention of new devices, tools and infrastructure for use in regions with few resources has apparently had trouble gaining recognition in major universities. With a few notable exceptions, formal academic programs in appropriate technologies are rare, and academics have few outlets to publish their research. The JHE aims to fill this gap.” Read more about the initiative.

The Journal of Humanitarian Engineering (JHE) publishes outcomes of research and field experiences at the intersection of technology and community development. The field of ‘humanitarian engineering’ describes the application of engineering and technology for the benefit of disadvantaged communities. This field spans thematic areas from water to energy to infrastructure; and applications from disability access to poverty alleviation. The JHE aims to highlight the importance of humanitarian engineering projects and to inspire engineering solutions to solve the world’s most pertinent challenges. – See more at: http://www.ewb.org.au/explore/knowledgehubs/education/journal#sthash.QPQnfYzI.dpuf
The Journal of Humanitarian Engineering (JHE) publishes outcomes of research and field experiences at the intersection of technology and community development. The field of ‘humanitarian engineering’ describes the application of engineering and technology for the benefit of disadvantaged communities. This field spans thematic areas from water to energy to infrastructure; and applications from disability access to poverty alleviation. The JHE aims to highlight the importance of humanitarian engineering projects and to inspire engineering solutions to solve the world’s most pertinent challenges. – See more at: http://www.ewb.org.au/explore/knowledgehubs/education/journal#sthash.QPQnfYzI.dpuf

Demand and JHE join a growing library of publications that specialize in “global development technologies”. Appropriate Technology has been around since 2003, while Makeshift saw the light in 2011. These magazines have to be paid for. More publications and academic programs can be found here. Previously: How to make everything yourself: online low-tech resources.

The Passive Solar Bird Bath

The passive solar bird bath provides some unfrozen water in the winter for the birds to drink. Its a nice simple design that is easy to build. The sun shines through the glazed panel on the south side of the pedistal and warms a solar absorber which heats the bird bath from below during the day. Jim got the idea from passive solar horse watering troughs. Find the building plans at BuildItSolar.

The Motorized “Solution” to Harvesting Wheat in Nepal

scythe versus grain wheaperThree short videos demonstrate how an ingenious (and centuries old) adaptation of the scythe for harvesting wheat beats simple tools and high-tech alike.

Steve Leppold writes us:

Here’s an example of a low-tech approach that is clearly superior to the motorized “solution”; and yet the expensive, fossil-fueled “upgrade” is being successfully marketed in developing nations like Nepal and India. One man from Canada is attempting to bring some sanity to the situation.

Alexander Vido and his teenage son brought donated equipment to Nepal in 2012, and made this short video of their volunteer efforts. The project is described at Scythe Project in Nepal.

Thanks, Steve. The project’s website has lots of technical information. Previously: The Religion of Complexity.

The Complete Guide to European Rail Maps & Atlasses

We all know road maps, but few people are aware there also exists such a thing as a rail map. Why would you need a rail map? After all, you are not steering and the train driver knows the way. However, a rail map gives you control over the route you take. In Europe, there are many ways to travel by rail from A to B. If you order a train ticket from Amsterdam to Madrid, for example, the train company will not necessarily offer you the cheapest or most interesting route.

rail map of europe

A rail map is especially interesting if you want to avoid high speed trains (which are more expensive), if you make long-distance trips, or if you just love to marvel at spectacular scenery. While an online rail map sounds more modern, nothing beats the convenience of a printed map when you are planning a trip.

[Read more…]

Stone Arch Bridges

how to build a stone arch bridge

“Stone arch bridges are amongst the strongest in the world. The technology has stood the test of time. The Romans built stone arch bridges and aqueducts with lime mortar more than twenty centuries ago. Arches and vaults were also the determining structural design element of churches and castles in the Middle Ages. There are stone arch bridges which have survived for hundreds and even thousands of years, and are still as strong today as when they were first constructed.”

“The main reason that western countries moved away from stone arch bridges is because of the high labour costs involved in their construction. In industrialised countries, it is cheaper to use pre-stressed concrete rather than employ a lot of masons and casual labourers. In the economic environment of East Africa and the majority of developing countries, stone arch bridges provide a more affordable and practical option.”

“A larger proportion of locally available resources are used in stone bridges as they can be built with local labour and stones. In contrast, raw materials and machines have to be imported for the construction of concrete bridges and specialized expertise is required. Compared to expensive aggregates, local stones are a strong, affordable material and they are often available in the vicinity (10-15 km) of the construction site. There is no need for expensive steel bars, aggregates, concrete or galvanised pipes that have to be hauled over long distances.”

Stone arch bridges, a strong and cost effective technology for rural roads. A practical manual for local governments, BTC Uganda & Practical Action.

Related:

Low-Tech Music: One String Guitar

Brushy One String – Chicken in The Corn (Official Video). Hat tip to Sara.