Abstract We study the chameleon field dark matter, dubbed scalaron, in F (R) gravity in the Big Bang Nucleosynthesis (BBN) epoch.With an R 2-correction term required to solve the singularity problem for F (R) gravity, we first find that the scalaron dynamics is governed by the R 2 term wella color charm 050 cooling violet and the chameleon mechanis

Emerging new communication standards like 5G or 6G aggravate the circuit design of radio-frequency generation systems as they constantly increase demand on high bandwidths, low latency, and high spectral purity.The utilization cocktail tree for sale of high- $Q $ oscillators, however, provides a possibility of optimisation of radio-frequency oscill

Additive manufacturing (AM) has gained prominence over the last 15 years and become a viable manufacturing option.Since there is Jeans great industrial interest to implement serial production of products using AM, the education of engineers in design for additive manufacturing (DfAM) is important today.DfAM extends on design for manufacturing to pr

In this paper, a physics-based model that couples a bank erosion model with a meander evolution model is developed and evaluated.The physics-based bank erosion model considers the cantilever simply southern cat shirt failure mechanism with slump blocks and decomposition effects.Moreover, bank accretion was considered using critical values of time r