This paper aims to perform a phenomenological parametrisation of the standard cosmological model, $\Lambda$CDM, weigh different physical processes that define pattern angular power spectra Cosmic Microwave Background (CMB) anisotropies. We use six amplitudes account for Sachs-Wolfe, early and late Integrated polarization contribution, Doppler lensing effects. To do so, we have adapted CLASS Bol...

where nf is the effective number of quark flavors. The finite-order expression depends on both μ and the choice of scheme used to define the coupling. In fact, Eq. (1) can be made to take on essentially any value by varying μ and the renormalization scheme, which are a priori completely arbitrary. The scale/scheme problem is that of choosing μ and the scheme s in an “optimal” way, so that an un...

Sulfur emission from coal combustion presents many environmental problems. The techniques used to reduce the amount of sulfur in coal before combustion, include physical, chemical and biological processes.Biological processes based on degradation of sulfur compounds by microorganisms offer many advantages over the conventional physical and chemical processes. The processes are performed und...