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Multijunction solar cells

So-called inverted metamorphic (IMM) multijunction solar cells made on compound-semiconductor technology are just becoming commercialized in July 2008. A compound semiconductor is a semiconductor compound composed of elements from two or more different groups of the periodic table. These semiconductors typically form in groups 13–15 (old groups III–V), for example of elements from group 13…

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The search for clean energy alternatives

Scientists continue to search for clean energy alternatives to our current power production methods. As the primary source of biofuel in North America, many organizations are conducting research in the area of ethanol production. One of many power plants at The Geysers, a geothermal power field in northern California, with a total output of over…

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Energy conservation

Energy conservation is the utilization of devices that require smaller amounts of energy in order to reduce the consumption of electricity. A view across a reverse osmosis desalination plant in Nepal. To provide the kind of information and support people need to invest money, time and effort in energy conservation, it is important to understand…

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Green Technology – Water purification

Water purification: The whole idea/concept of having dirt/germ/pollution free water flowing throughout the environment Sustainable urban design and innovation: Photovoltaic ombrière SUDI is an autonomous and mobile station that replenishes energy for electric vehicles using solar energy. Ion exchange: Ion exchange systems use ion exchange resin- or zeolite-packed columns to replace unwanted ions. Drinking water…

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HTML sent in an email

In order to ensure that HTML sent in an email is rendered properly by the recipient’s client software, an additional header must be specified when sending: “Content-type: text/html”. Most email programs send this header automatically. Database implementations commonly store varying-length fields in special ways, in order to make all the records of a given type…

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Army focuses on autonomous system development

The U.s. Armed force http://www.army.mil/ has put resources into mechanical technology engineering for a long time, and the center is perpetually expanding to independent framework advancement. Matt Donohue is the science and innovation ground move engineering portfolio executive for the Office of the Assistant Secretary of the Army for Acquisition, Logistics and Technology. “My vision is…

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Army robotics look far into the future

The U.s. Armed force imagines a future where robots are vital parts of the group performing self-sufficient activities and keeping up present capacities. Five years back, the U.s. Armed force Research Laboratory, known as ARL, set out to seek after this vision by structuring the Robotics Collaborative Technology Alliance. It looked for accomplices in industry…