{ "items" : [
    { "id" : "http://dbpedia.org/resource/Jamming_(physics)"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "Jamming is the physical process by which some materials, such as granular materials, glasses, foams, and other complex fluids, become rigid with increasing density.  The jamming transition has been proposed as a new type of phase transition, with similarities to a glass transition but very different from the formation ofcrystalline solids.While a glass transition occurs when the liquid state is cooled, the jamming transition happens when density is increased."] } } }
