Music of New York City that its status has declined in recent years, due to a combination of increased corporate control over music media, an increase in the cost of living, and the rise of local music scenes whose success is facilitated by the cheap communication provided by the Internet. New York has been a center for the American music industry since the earliest records in the early 20th century. Since then, a number of companies and organizations have set up headquarters in New York, from the Tin Pan Alley publishers and Broadway to modern independent rock and hip hop labels, non-profit organizations, and others.
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