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Terni–Perugia–Sansepolcro Railway
Terni–Perugia–Sansepolcro railway is a railway line in Umbria, Italy. It was built by the Ferrovia Centrale Umbra (Central Umbrian Railway Company, FCU) The line, about in length, connects Terni in southern Umbria with Sansepolcro, Tuscany, with stops in Todi, Perugia, Umbertide and Città di Castello. It is operated by Busitalia Sita Nord, a subsidiary of the Ferrovie dello Stato Italiane group. History The line was inaugurated on 12 July 1915. It was partially destroyed during World War II, and gradually reopened between October 1944 and May 1953. Passenger numbers peaked at 3,001,900 in 1975. In the late 1970s, due to its poor financial results and the risk of closure, the railway was taken over by the Province of Perugia. In 2000, the rail operator was reorganized into a company owned by the regional government, and in December 2010 it was subsumed into a holding company gathering all the regional public transport services. In 2009, the company employed 211 peopl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ALn 776
Aluminium nitride (Aluminium, AlNitrogen, N) is a solid nitride of aluminium. It has a high thermal conductivity of up to 321 W/(m·K) and is an electrical insulator. Its Wurtzite (crystal structure), wurtzite phase (w-AlN) has a band gap of ~6 eV at room temperature and has a potential application in optoelectronics operating at deep ultraviolet frequencies. History and physical properties AlN was first synthesized in 1862 by F. Briegleb and A. Geuther. AlN, in the pure (undoped) state has an electrical conductivity of 10−11–10−13 Ω−1⋅cm−1, rising to 10−5–10−6 Ω−1⋅cm−1 when doped. Electrical breakdown occurs at a field of 1.2–1.8 V/mm (dielectric strength). The material exists primarily in the hexagonal Wurtzite (crystal structure), wurtzite crystal structure, but also has a metastable cubic Zincblende (crystal structure), zincblende phase, which is synthesized primarily in the form of thin films. It is predicted that the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
