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Bem-vindo ao Appropedia,


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

Henry David Thoreau
For it matters not how small the beginning may seem to be: what is once well done is done forever.

Henry David ThoreauW

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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

Photovoltaic vaccine refrigeration at Centro De Salud

Building a solar powered (photovoltaic) vaccine refrigerator with a community hospital in Northern Mexico. Now the sun helps keep the vaccines consistently cold.

Service learning as a teaching method combines community service with academic instruction that focuses on critical, reflective thinking and civic responsibility. Service learning programs involve students in organized community service that addresses local and global needs, while developing their academic skills, sense of civic responsibility, and commitment to the community. Internships offer ways individuals can learn from valuable work experiences while also contributing to the host's mission.

Service learning using Appropedia helps to create an essential knowledge base for the world via learning experiences for individuals and classes. The Appropedia Foundation and the Appropedia community work with universities via service learning courses, as well as service learning programs to create these opportunities. Appropedia internships also offer opportunities for service learning.

 

edit  watch  Selected service learning Projects gallery (refresh)

The Parras Summer Program, in Parras,W, Mexico is a summer immersion in Appropriate Technology, globalization and Spanish language and culture. See the Parras Invitation for more information.

Most of the Parras2005 group near Perote  
Most of the Parras2006 group near Perote  
Most of the Parras2007 group farming  
Most of the Parras2008 group near Perote  

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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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