Unified field theory classical field theory and, two years later, that of Theodor Kaluza, who extended General Relativity to five dimensions. Continuing in this latter direction, Oscar Klein proposed in 1926 that the fourth spatial dimension be curled up into a small, unobserved circle. In Kaluza–Klein theory, the gravitational curvature of the extra spatial direction behaves as an additional force similar to electromagnetism. These and other models of electromagnetism and gravity were pursued by Albert Einstein in his attempts at a classical unified field theory. By 1930 Einstein had already considered the Einstein–Maxwell–Dirac System [Dongen]. This system is (heuristically) the super-classical [Varadarajan] limit
Unified Fire Authority contract cities in addition to the Unincorporated Salt Lake County. These cities wanted to play a more active role in the fire administration. In 2004, the department ceased operation as a County government entity and became the Unified Fire Authority. The Unified Fire Authority is the sponsoring agency of Urban Search and Rescue Utah Task Force 1, one of the 28 FEMA Urban Search and Rescue Task Forces in the United States. Managed daily by full-time staff of Unified Fire under the direction of the Federal Emergency Management Agency - Urban Search & Rescue, Response Directorate/Operations Division. Adopted Budget 2017