Some models for quantum gravity (QG) violate Lorentz invariance and predict an energy dependence of the speed of light, leading to a dispersion of high-energy gamma-ray signals that travel over cosmological distances. Limits on the dispersion from short-duration substructures observed in gamma-rays emitted by gamma-ray bursts (GRBs) at cosmological distances have provided interesting bounds on ...

This paper presents a very useful software tool to design, simulate and optimise wastewater treatment plants. The program is called DESASS (DEsign and Simulation of Activated Sludge Systems) and has been developed by CALAGUA research group. The mathematical model implemented is the Biological Nutrient Removal Model No.1 (BNRM1) which allows simulating the most important physical, chemical and b...

The equilibrium of dense plasma in a gravity field and problem of a gravity-induced electric polarization in this matter are discussed. The calculation for metals performed before shows that both-the gravity-induced compressive strain and the gravity-induced electric field-are inversely proportional to their Young moduli. The calculation for high dense plasma, where Young modulus is equal to ze...

Gravity currents are very common in nature and may appear in rivers, lakes, oceans, and the atmosphere. They are produced by the buoyant forces interacting between fluids of different densities and may introduce sediments and pollutants into water bodies. In this study, the hydrodynamics and propagation of gravity currents are investigated using WISE (Width Integrated Stratified Environments), ...

Polyhydroxyalkanoates are biopolyesters stored as reserve source of energy by a great number of prokaryotes. It is stored as intracellular granules and during normal growth, its content in the cells usually does not reach high concentrations, usually in the range of 2–10 %, but the PHB contents can reach more than 80 % of the dry biomass if growth is limited by depletion of an essential nutriti...

Linearized gravity in the Very Special Relativity (VSR) framework is considered. We prove that this theory allows for a non-zero graviton mass mg without breaking gauge invariance nor modifying relativistic dispersion relation. find analytic solution new equations of motion our choice, verifying as expected existence only two physical degrees freedom. Finally, through geodesic deviation equatio...