Modulated decay in the multi-component Universe

mesuring the staff technology readiness, the case of a multi national chemical company operating in iran

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Strongly stable multi-time stepping method with the option of controlling amplitude decay in responses

Recently, multi-time stepping methods have become very popular among scientist due to their high stability in problems with critical conditions. One important shortcoming of these methods backs to their high amount of uncontrolled amplitude decay. This study proposes a new multi-time stepping method in which the time step is split into two sub-steps. The first sub-step is solved using the well-...

Decay of Magnetic Fields in the Early Universe∗

We study the evolution of a stochastic helical magnetic field generated in the early Universe after the electroweak phase transition, using standard magnetohydrodynamics (MHD). We find how the coherence length ξ, magnetic energy EM and magnetic helicity H evolve with time. We show that the self-similarity of the magnetic power spectrum alone implies that ξ ∼ t1/2. This in turn implies that magn...

Evidence for a new dark matter component in the Universe ?

The abundance of local clusters is a traditional way to derive the amplitude of matter fluctuations, commonly specified by σ8, but which suffers from a systematic uncertainty arising from the lack of accurate knowledge of the mass temperature relation. In the present work, by assuming that the observed baryon content of clusters is representative of the universe, we show that the mass temperatu...

Multi-Component Efficiency with Shared Resources in Commercial Banks