We present a self-contained calculation of the hydrostatic pressure in λφ 4 theory with O(N) internal symmetry. In the large N limit the pressure can be expressed in a resummed form. Our calculations are based on composite-operator renormal-ization. As a byproduct, the renormalized (or improved) energy-momentum tensor is obtained. The Dyson-Schwinger equations are used to discuss both the mass ...

according to flexibility of pneumatic conveying systems with respect to other types of transmission systems, this system has wide application in industry and agriculture processes. one important application of this system is in the loading and unloading tankers and powdery bulk materials such as trucks carrying cement, plaster and sand. conveying efficiency is associated with pressure, which in...