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Partilha de conhecimentos para construir ricos, vidas sustentáveis

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interessado em eficientes fogões a lenha? verifique o Wood Burning Stoves 2.0 DVD set Kickstarter de Paul Wheaton.

(Crowdfunding phase has now ended.) (refresh)

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Tem um dispositivo inovador médica ou e-saúde solução configurações de segmentação em desenvolvimento? ver Inovadoras Organização Mundial da Saúde dispositivos médicos e soluções de saúde em linha para poucos recursos 2013. Fecha 15 de março.

From today's featured article

Marshall McLuhan holding a mirror
There are no passengers on spaceship earth. We are all crew.

Marshall McLuhanW

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Dremelfuge
Open source 3-D printing of OSAT. There have been a number of open source 3D printers, such as the RepRap developed. The basic idea for this project is to use them as tools to create OSAT in the field to help the goals of sustainable development. Prices on 3D printers are dropping rapidly.

An example of how these 3D printers can be used to meet these goals is the DremelFuge. The Dremelfuge is brilliant Open Source Hardware project developed by Cathal Garvey in Ireland. The DremelFuge is a printable rotor for centrifuging standard microcentrifuge tubes and miniprep columns. It is at least 10 times less expensive than a standard centrifuge and can be used by field workers in doing things like blood tests, but also by DYI biologists and educators. It requires industry standard 1.5ml/2ml Eppendorf/Microcentrifuge tubes.

  • Used with a drill at 3000 RPM, the Dremelfuge will deliver over 400g, enough to comfortably spin down Miniprep samples (proven personally). It will likely achieve acceptable results at lower speeds, too.
  • Used at 10krpm, on a Rotary tool for instance, a Dremelfuge should deliver over 4400g, more than enough to spin down bacterial cells.
  • At 16krpm, Dremelfuge matches commercial centrifuges.
  • On a Dremel 300, a maximum speed of 33krpm equates to a force of over 50,000 times earth's gravity, which puts it into so-called "Ultracentrifuge" territory. The latest version (as printed by Shapeways) has successfully spun tubes at this speed.

Highlighted project

Aleiha's parabolic solar cooker

A very hot (400 °F) parabolic solar cooker. Made from an reclaimed satellite dish using bicycle powered tools.

Kiva's straw bale greenhouse
An alternative or natural building involves a range of building systems and materials that place major emphasis on sustainability. Ways of achieving sustainability through natural building focus on durability and the use of minimally processed, plentiful or renewable resources, as well as those that, while recycled or salvaged, produce healthy living environments and maintain indoor air quality. Natural building tends to rely on human labor, more than technology. As Michael G. Smith observes, it depends on "local ecology, geology and climate; on the character of the particular building site, and on the needs and personalities of the builders and users."

The basis of natural building is the need to lessen the environmental impact of buildings and other supporting systems, without sacrificing comfort, health or aesthetics. To be more sustainable, natural building uses primarily abundantly available, renewable, reused or recycled materials. The use of rapidly renewable materials is increasingly a focus. In addition to relying on natural building materials, the emphasis on the architectural design is heightened. The orientation of a building, the utilization of local climate and site conditions, the emphasis on natural ventilation through design, fundamentally lessen operational costs and positively impact the environmental. Building compactly and minimizing the ecological footprint is common, as are on-site handling of energy acquisition, on-site water capture, alternate sewage treatment and water reuse.

edit  watch  Selected service learning Projects gallery (refresh)

Engr305 Appropriate Technology Projects: Below are selected service learning projects from Engr305 Appropriate Technology, which is a course on appropriate technology at Humboldt State University taught by instructor Lonny Grafman.

HBCSL cobb oven

A cobb oven for the Humboldt Bay Center for Sustainable Living  
HBCSL solar shower

A solar shower for the Humboldt Bay Center for Sustainable Living  
Jefferson Community Center compost

A large composting system for Jefferson School  
Jefferson Community Center E305 teach-in

A vermicomposting workshop  
Kiva's straw bale greenhouse

A straw-bale greenhouse  
M Street Eureka rainwater catchment

A rainwater catchment system for residential property  
Mattole Community Center rainwater catchment

A rainwater catchment from the roof of the Mattole Valley Community Center in Petrolia  
Millcreek greywater

A residential greywater processor  
Old Growth Cellar rainwater catchment

A rainwater catchment system for Old Growth Cellars  

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From Appropedia newest content:

  • ... that it is not known how the Paris Codex (pages pictured), one of only three surviving pre-Columbian Maya books, came to be in the collection of the Bibliothèque Imperiale in Paris in the 19th century?
  • ... that Henry Seidu Daanaa is the first blind person to be called to the Ghana Bar?
  • ... that the wheatbelt shrub Persoonia coriacea can have naturally twisted leaves?
  • ... that baseball announcer Shelby Whitfield wrote a book titled Kiss It Goodbye that helped prompt the Federal Communications Commission to investigate the ethics of sports broadcasting?
  • ... that the Muslim conquest of Sicily lasted from 827 to 902 AD?
  • ... that the Gustav Adolfs Kyrka in Liverpool was W. D. Caroe's first independent commission to design a church?
  • ... that when Charles O'Rear took a photograph of a green, lush hillside near Napa Valley, he did not expect it to be "the most viewed image of the world"?
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