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Results 961 - 970 of 4398 for Electrical devices
  • Article - 27 Feb 2002
    If the structure of carbon fullerenes and buckytubes is not fascinating enough, add their amazing properties. Many of these stem from their defect free structure. Mechanical, thermal and electrical...
  • Article - 27 Feb 2002
    The addition of buckytubes to polymer matrices can introduce fascinating mechanical, electrical and thermal properties as well as opening the door to a range of new applications. These new...
  • Article - 27 Feb 2002
    Buckytubes are a type of fullerene or perfect carbon structure. The discovery, evolution and structure of single and multiwall buckytubes are considered. Advantages over other materials including...
  • Article - 16 Feb 2002
    The only material that is practically used for electron emitters is tungsten. Although there are other electropositive metals that yield higher emission rates, tungsten has an extremely low vapor...
  • Article - 8 Jan 2002
    Most PV's use single junctions which limit the amount of energy which can be converted into electricity. One way top get around this is to use two or more differenet cells or multijunction cells. How...
  • Article - 8 Jan 2002
    Concentrators are essentially lenses that help to increase the intensity of the light hitting the PV. Concentrator systems are more complex and actually consist of complex optics. Their makeup,...
  • Article - 8 Jan 2002
    This article covers the not so obvious parts of a PV system. These include the mounting system, tracking structures, power conditioners and power storage components. These are termed "balance of...
  • Article - 8 Jan 2002
    Several interesting facts about photvoltaics (PV's) such as "the most frequently seen applications for PV is in consumer products, e.g. hand-held calculators, watches, portable lights etc."
  • Article - 7 Jan 2002
    Single crystal silicon is the most popular material for photovaoltaic cells, due in part to its abundance. This article compares it to semi and polycrystalline silicon, while also covering preparation...
  • Article - 7 Jan 2002
    Amorphous silicon is reviewed as a photovoltaic material. Reasons why it is suited to the application, how it works and how it is applied in solar cells are covered.

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