Classical unified field theories since antisymmetry seemed essential for electromagnetism, the symmetry requirement was relaxed for one or both fields. Einstein's proposed unified-field equations (fundamental laws of physics) were generally derived from a variational principle expressed in terms of the Riemann curvature tensor for the presumed space-time manifold. In field theories of this kind, particles appear as limited regions in space-time in which the field strength or the energy density are particularly high. Einstein and coworker Leopold Infeld managed to demonstrate that, in Einstein's final theory of the unified field, true singularities of the field did have trajectories resembling point particles. However, singularities are
Unified settlement planning and Planning - 2032, on 18 & 19 April 2012. The seminar has strongly recommended that the development of rural and urban settlements in India should not be planned separately. The fundamental objective for a unified settlement plan includes: The strategies for achieving the objectives include: Unified settlement planning Unified settlement planning (USP) is the component of regional planning where a unified approach is applied for a region's overall development. The USP approach is most often associated with urban planning practices in India. Regions use their land in for various purposes, including agriculture, manufacturing, and public administration. For society to