Abstract: A gas (or steam) turbine is disclosed including: a rotor with at least one array of rotor blades, a stator with a casing and a shroud ring; the shroud ring extends around the array of blades rotor and the casing extends around the shroud ring. The shroud ring has radial size independent from temperature thanks to its material, and is movably coupled with the casing so to allow the casing of the stator to thermally expand and contract during operation of the turbine while maintaining the shroud ring radial size. Also the rotor thermally expands and contracts during operation of the turbine, and, at working temperature, tip regions of the rotor blades are in close proximity to an inner region of the shroud ring so that clearance is small or even zero at working condition.

Abstract: An operation associated with an artifact which includes a plurality of fragments is received. A dimension is obtained and a plurality of sub-operations is generated based at least in part on the operation and the dimension where each of the plurality of sub-operations is associated with a subset of values associated with the dimension. The plurality of sub-operations is performed on the plurality of fragments, including by generating, for each of the plurality of fragments, dimensional metadata which includes a subset of values associated with the dimension for that fragment.

Abstract: A method for initial synchronisation in a random access procedure in LTE standards provides dividing the Physical Random Access Channel (PRACH) into a plurality of tiles, each comprising by a adjacent subcarriers, over which the channel response is assumed to be substantially flat, i.e. the frequency response is replaced over each subcarrier of a tile with an average frequency response. In an embodiment, an algorithm for initial synchronization is provided on the basis of a generalized likelihood ratio test (GLRT).