Analysis of the cutting machine movement across the field when harvesting dead crops

The article is devoted to the analysis of various types of cutting machine movement across the field when harvesting dead crops. It is noted that despite improvements in the design of the cutting machine, the problem of grain loss remains unresolved. A classification of the types of cutting device movement according to the movement nature is proposed, which can serve as a basis for substantiating agrotechnical requirements for the quality of soil surface treatment

RB-87 NMR lineshape study of the incommensurate phase in RB2ZNBR4

Contains fulltext : 91269.pdf (publisher's version ) (Open Access

Локальний полярних порядок у сегнетоелетрику-релаксорі Na₁/₂Bi₁/₂TiO₃ за дослідженням ЯМР ²³Na

²³Na NMR spectra have been measured in a very low magnetic field at temperatures between 293 K and 729 K. The achieved spectral resolution is sufficient to test various models of short-range order in the Na₁/₂Bi₁/₂TiO₃ structure using computer simulations of the spectral line shape. The best agreement between experimental and calculated spectra has been obtained for the inhomogeneous structure where the polar nanoscale areas with Na displaced along the pseudo-cubic directions [111]p coexist in the 293 K-580 K temperature region with the tetragonal phase insertions with Na displaced along [100]p and the "matrix" having very small deviations from the cubic structure