Media in New York City national Public Broadcasting Service (PBS) programming. WNYC, a public radio station owned by the city until 1997, has the largest public radio audience in the United States. The City of New York operates a public broadcast service, NYC Media, that produces several original New York Emmy Award-winning shows covering music and culture in city neighborhoods, as well as city government-access television (GATV). New York City is home to a number of major online media companies, including Verizon's digital content subsidiary Oath Inc. and its operations under the AOL brand, along with news and entertainment companies like BuzzFeed and VICE Media.
Polycrystalline silicon grain boundaries, see figure 1. The resistivity, mobility, and free-carrier concentration in monocrystalline silicon vary with doping concentration of the single crystal silicon. Whereas the doping of polycrystalline silicon does have an effect on the resistivity, mobility, and free-carrier concentration, these properties strongly depend on the polycrystalline grain size, which is a physical parameter that the material scientist can manipulate. Through the methods of crystallization to form polycrystalline silicon, an engineer can control the size of the polycrystalline grains which will vary the physical properties of the material. The use of polycrystalline silicon in the production of solar cells requires