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    About Findability

    As 21st century education adapts to its online future, the edu sector is learning to work under the network laws that make the best study knowledge findable. Findability emerges naturally from educational resources embedded in a network when these 7 elements are present.

    Digital - Educational materials that are printed are outside of the digital online commons where findability arises.

    Unbundled - Findability works bests with the smallest pieces of content, so bundles like curricula, courses, and PDFs stifle findabiity.

    Open - To be findable, content must be open in the one Web global commons, with no barriers of cost, subscription, or copyright.

    SEOed - Search Engine Optimization with keywords and linking attracts search engine spiders and boosts rankings on search engine results pages.

    Juiced - Webpages getting higher search engine page ranks from links by educators judging their content as superior.

    Networked - Nodes of learning content are syndicated (RSS), virally spread, and connected into social networks.

    Mobilized - Nodes of learning content are becoming findable to millions, and potentially billions, of new learners by being optimized for mobile phones.

    The learn nodes posted on this blog are models that show how you can increase findabiity for open educational resources.

  • The LEARN NODE is a tool for creating findability

    The illustration below shows a learn node, which you can use as an educator to make webpages more findable. The top little circles illustrate links out to content nodes related to the subject of the large circle. Bottom left, experts connect to the node affirming its quality - giving it juice. Bottom right, a student connects to the node to learn the subject of its content.

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    Blog posts are used to make learn nodes on this website. Click here for a primer on using a blog post to make a learn node. Any webpage with its own url can be used as a learn node.

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Jan
11

Learn node: Removing dangerous arsenic from drinking water

Arsenic
This learn node clusters material about the dangerous presence of arsenic in ground water of the United States as illustrated the map here from the U.S. Geological Survey’s Water Quality Assessment Analysis of Trace Elements webpage. Information on the world wide arsenic in drinking water problem is abundant on the World Health Organization Arsenic in drinking water Fact Sheet.

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A look at an example of the arsenic problem in drinking water is provided by the American Museum of Natural History’s 2007-08 special exhibit on Water, which describes a situation where arsenic foiled attempts to get good water by drilling below bacterial contamination:

In Bangladesh, millions of deep wells were drilled to end use of bacteria-laced surface water. It worked: for instance, infant mortality dropped sharply. But many of the wells turned out to contain high levels of naturally occurring arsenic—an extremely toxic chemical element with serious health effects. Today, experts are working to develop inexpensive methods of removing arsenic from the water.

So how would you get arsenic out of water? Three pages from a Stiochiometry tutorial at Carnegie Mellon University’s openlearning initiative describes a method developed by Prof. Fakhrul Islam, a chemist at Bangladesh’s Rajshahi University. The tutorial is Arsenic remediation: Using powder to absorb arsenic from water.


One Response to “Learn node: Removing dangerous arsenic from drinking water”



Your Comments
  1. Bob Says:

    I’ve personally researched and learned that arsenic removal from one’s source water can be a difficult task without the right water filtration technology. I’ve come across an impressive option called the ArsenicMaster whole house arsenic water filtration system which will completely remove or significantly reduce the arsenic from one’s source water. For those that are interested, I know that the company Vitasalus at http://www.vitasalus.com or http://www.equinox-products.com sells the ArsenicMaster Whole Home Arsenic Water Filter System for a fraction of the cost of other companies.

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