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Bem-vindo ao Appropedia,


Partilha de conhecimentos para construir ricos, vidas sustentáveis

Appropedia é para soluções colaborativas
in sustentabilidade, tecnologia apropriada e pobreza redução.

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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

John F. Kennedy
Nothing compares to the simple pleasure of a bike ride.

John F. KennedyW

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Building a very hot parabolic solar cooker using pedal power tools.
Notice how the focus is the same for the various parabolas.
Aleiha's parabolic solar cooker. The paraboloid is an interesting shape with some amazing qualities. It has the power to concentrate light, electronic waves, sound, etc. to its focus at the center. To find the focal point of a paraboloid, one must use the formula, y=p*x^2, where p is a constant. The variable y is the depth of the dish, and x measures the distance from the center axis to the maximum circumference of the dish. You have to pretend that there is an x axis going through the center of the base of the dish and a perpendicular y-axis passing from the center of the base of the dish to the focal point. The two numbers, x and y, represent a point on the paraboloid, and from that, you are able to determine where the focus is.

Parabolic cookers have been used for centuries now. The idea to concentrate light using curved mirrors was developed by the Greeks, Aztecs, Incas, Romans and Chinese. The Incas used bronze and gold for their mirrors and they built structures that were several stories high. This technology seems to have appeared around the same time for each of the civilizations. It is thought that Archimedes harnessed the technologyW to defend Syracuse from invading Roman fleets in 212 BC.

Highlighted project

Ecological dry toilets at Pedregal

Ecological dry toilets at Pedregal, a Permaculture Demonstration Center in Oaxaca, Mexico.

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)

MOST completed projects and publications: This category lists completed projects for the Category:MOST. Following the individual links leads to a summary of the project and key findings, related literature reviews, methods, protocols, and equipment, and an open access version of the paper published in a peer reviewed journal.

Michigan Tech Open Sustainability Technology Group Completed Projects and Publications 2011-2012

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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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    2. Cost of bicycle parts
    3. Newspaper Briquette Maker
    4. Black Mamba Bike pedal
    5. Clamps: "Wooden" Handscrew Style
    6. OSAT Wind Turbine
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    8. Clamps with Gearing Systems
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    10. Contoured Spigot for 5-gallon buckets
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    12. 777 Big Money Project
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    14. Open-source 3D metal printer
    15. Substrate Release Mechanisms for Gas Metal Arc Weld 3D Aluminum Metal Printing
    16. Open-source scientific equipment
    17. It Is Time to Move Research Expenditures to the Denominator in University Metrics
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