electric field

. A numerical method for calculating ste­ady periodic processes of nonlinear differential equations of motion in an electric field is proposed based on their integration under initial conditions that exclude transi­ent reaction. The calculation of such initial conditions is based on Newton's iterative formula.

In physics, as in other sciences, scientific results are often presented formally, without appropriate disclosure of their physical meaning. For example, in the discussion about interacting charged bodies the meaning of charge is not discussed. It is shown that the term "electric charge" in science is conditional and has an auxiliary symbolic meaning. In reality there is a "positive" and "negative" substance in nature. There is no any charge isolated apart from the substance. In fact, in nature there are a proton and an electron as a matter.

The processes originating in local areas of cross-linked polyethylene (XLPE) insulation of extra-high voltage cables during water tree germination between closely disposed water micro-inclusions in insulation have been studied. According to current experimental data, water trees in XLPE have not solid cylindrical shape, as it was thought previously, but they consist of closely spaced nanoscale inclusions of spheroid form and nanoscale thin water channels between them (so-called "string of pearls" confi­guration).