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• Technology
  Robotics Research
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  Batteries
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  Mobile phone

  A mobile phone or cell phone is an electronic telecommunications device with the same basic capability as a conventional fixed-line telephone, but which is also entirely portable and is not required ... > more
• Weapons Technology
  Nuclear Energy
  Chemistry
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  Inorganic Chemistry
  Organic Chemistry
   

  Isotope

  Isotopes are forms of an element whose nuclei have the same atomic number–-the number of protons in the nucleus--but different mass numbers because they contain different numbers of ... > more
• Nanotechnology
  Materials Science
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  Spintronics
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  Nanoparticle

  A nanoparticle (or nanopowder or nanocluster or nanocrystal) is a microscopic particle with at least one dimension less than 100 nm. Nanoparticle research is currently an area of intense scientific ... > more
• Energy and the Environment
  Solar Energy
  Renewable Energy
  Geomagnetic Storms
  Environmental Science
  Graphene
   
  

  Solar cell

  A solar cell (or a "photovoltaic" cell) is a device that converts photons from the sun (solar light) into electricity. In general, a solar cell that includes both solar and nonsolar sources of light ... > more
• Transportation Science
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  Detectors
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  Optics
   
  

  Navigation

  There are several traditions of navigation. In the pre-modern history of human migration and discovery of new lands by navigating the oceans, a few peoples have excelled as sea-faring ... > more
• Petroleum
  Fossil Fuels
  Energy and the Environment
  Rainforests
  Air Quality
  Chemistry
   
  

  Natural gas

  Natural gas, commonly referred to as gas, is a gaseous fossil fuel consisting primarily of methane. It is found in oil fields and natural gas fields, as well as—in smaller quantities—in ... > more
• Energy and the Environment
  Renewable Energy
  Environmental Science
  Nuclear Energy
  Petroleum
  Energy Technology
   
  

  Future energy development

  Energy development is the ongoing effort to provide abundant and accessible energy, through knowledge, skills and constructions. When harnessing energy from primary energy sources and converting them ... > more
• Inorganic Chemistry
  Materials Science
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  Chemistry
  Nanotechnology
  Vehicles
   
  

  Scale model

  A scale model is a representation or copy of an object that is larger or smaller than the actual size of the object being represented. Very often the scale model is smaller than the original and used ... > more
• Inorganic Chemistry
  Chemistry
  Spintronics
  Physics
  Sports Science
  Materials Science
   
  

  Transition metal

  The term transition metal (sometimes also called a transition element) commonly refers to any element in the d-block of the periodic table, including zinc, cadmium and ... > more
• Detectors
  Healthy Aging
  Attention Deficit Disorder
  Sports Science
  Sports Medicine
  Nature of Water
   
  

  Radon

  Radon is a chemical element in the periodic table that has the symbol Rn and atomic number 86. A radioactive noble gas that is formed by the disintegration of radium, radon is one of the heaviest ... > more

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