Absorption of ultrasound by a magnetic fluid in a rotating magnetic field

Experimental results on the absorption of ultrasound by a magnetic fluid in a rotating magnetic field have been obtained for the first time. It is shown that the lag of the angular dependence of the ultrasonic absorption coefficient by a magnetic fluid in the range of magnetic field rotation frequencies fH = 0.056 - 280 mHz at T = 295 K is not observed within the limits of observational errors. Similar results were observed for both low-viscosity and high-viscosity magnetic fluids. Tables 1, Figs 6, Refs 39.

Effect of rotation system on irrigated potato crop

In our country average precipitation is annually 250-300 mm, and when we assuming that we need 47.6-43.0 mm precipitation for getting 1 tons of potato and thus means it is sufficient for 6-7tons yield For more yield use irrigation systems to provide the fields with enough water and humidity is important issue. Cultivation using rotation is not only for producing high yields but also it is important for stabilizing and improving the soil fertility like the first condition of the soil. Irrigated potato fields have a special effect on reducing diseases and increasing yields, lengthening the rotation in the crop rotation sector, increasing the crop structure in rotation, and the use of alternating green manure. The 3-field rotation with green manure has a total yield of 32.0 t / ha, which is 5.4-14.2 t / ha higher than other crop rotations, and the standard yield is 95.7 percent, which is 0.6-5.9 percent higher than other crop rotations. Усалгаатай талбайн төмсний ургацад сэлгээний нөлөө Манай орны хувьд жилд дунджаар 250-300 мм хур тунадас ордог бөгөөд 1 тонн төмс авахад 40.0-50.0 мм хур тунадас орох шаардлагатай гэж үзвэл 6-7 тонн ургац авахад хангалттай гэсэн үг юм.[3] Илүү их ургац авахын тулд тариалангийн талбайг хангалттай хэмжээний ус, чийгээр хангахын тулд усалгааны системийг ашиглах нь чухал асуудал юм. Ээлжлэн тариалалт хийх нь ургац нэмэгдүүлэхээс гадна хөрснийг хамгаалах, хөрсний үржил шимийг тогтворжуулах, сайжруулахад чухал ач холбогдолтой юм. Усалгаатай төмсний талбайд өвчлөлийг бууруулж, ургацыг нэмэгдүүлэхэд ээлжлэн тариалалтын эргэлтийг уртасгах, сэлгээнд байгаа таримлын бүтцийг нэмэгдүүлэх мөн сэлгээд ногоон бордуурт уринш хэрэглэх нь онцгой нөлөөтэй. Ногоон бордуурт уринш оролцсон 3-талбайт сэлгээ нь нийт ургац 32.0 т/га байж бусад сэлгээний хувилбараас 5.4-14.2 т/га илүү, стандарт ургацын эзлэх хувь 95.7 хувь байж бусад ээлжлэн тариалах хувилбарт 0.6-5.9 хувиар давуу байна. Түлхүүр үг: сэлгээ, төмс, ургац, өвчин, ногоон бордуурт

Effect of crop rotation in soil microorganisms

The aimed of this study was to effect of crop rotation on soil microorganisms activity, that’s soil biological indicator. Plots are Fallow-Wheat-Pea and Green manure fallow-Wheat-Oat+Melilotus of 3 fields rotation type. The study was conducted to determine the effect of crop rotation in soil biological indication is microbial active. Total number of microorganisms and nitrogen fixing bacteria determined in soil of three field rotation (Fallow-What-Peat, Green manure fallow-Wheat, Oat and Melilotus). The results of study in 2016-2019 in three field rotation – Peat, Wheat, Fallow were 85.6-96.9x106 CFU/g microorganisms. There were 87.5-89.3% bacteria and 10.6-12.4% actinomycetes. Rotation fields of Oat and Melilotus, Green manure fallow, Wheat were 91.7-92.4 CFU/g microorganisms of it 82.1-84.4% bacteria and 15.5-17.8%-actinomycetes. Хөрсний бичил биетний идэвхид сэлгээний нөлөөг судалсан дүн Хөрсний биологийн илтгүүр болох бичил биетний идэвхид таримлын сэлгээний үзүүлэх нөлөөг судлах зорилгоор 3 талбайт Уринш-Буудай-Вандуйн, Ногоон бордуурт уринш–Буудай–Овъёос+Донник бүхий таримлуудын сэлгээний хөрсөнд нийт бичил биетний тоог зүйлийн бүрэлдэхүүнээр, мөн азот шингээгч ашигтай бактерийн тоог тус тус тодорхойлов. 2016-2019 оны судалгааны дүнгээр ЭТС-ийн 3 талбайт Вандуй, Буудай (цуулбар) – Уринш хувилбарын 1 г хөрсөнд 85.6-96.9 сая.ш бичил биетэн, үүний 87.5-89.3%-ийг бактери, 10.6-12.4%-ийг актиномицет, 3 талбайт О+Д-НБУ-Буудайн сэлгээний 1 г хөрсөнд 91.7-92.4 сая.ш бичил биетэн, үүний 82.1-84.4%-ийг бактери, 15.5-17.8%-ийг актиномицет эзэлж байна. Түлхүүр үг: азот шингээгч, бактери, актиномицет, мөөгөнцөр

Spontaneous baryogenesis from axions with generic couplings

Axion-like particles can source the baryon asymmetry of our Universe through spontaneous baryogenesis. Here we clarify that this is a generic outcome for essentially any coupling of an axion-like particle to the Standard Model, requiring only a non-zero velocity of the classical axion field while baryon or lepton number violating interactions are present in thermal bath. In particular, coupling the axions only to gluons is sufficient to generate a baryon asymmetry in the presence of electroweak sphalerons or the Weinberg operator. Deriving the transport equation for an arbitrary set of couplings of the axion-like particle, we provide a general framework in which these results can be obtained immediately. If all the operators involved are efficient, it suffices to solve an algebraic equation to obtain the final asymmetries. Otherwise one needs to solve a simple set of differential equations. This formalism clarifies some theoretical subtleties such as redundancies in the axion coupling to the Standard Model particles associated with a field rotation. We demonstrate how our formalism automatically evades potential pitfalls in the calculation of the final baryon asymmetry.

Transport ratios of the kinetic Alfvén mode in space plasmas

<p>Electric field properties of the kinetic Alfvén mode are analytically studied by constructing the dielectric tensor of the plasma using the linear Vlasov theory and reducing (and identifying) the tensor elements into that of the fluid picture such as the polarization drift, the Hall current, and the diamagnetic current. Off-diagonal dielectric responses do not primarly contribute to the dispersion relation of the kinetic Alfvén mode, but play an important role in the electric field polarization (field rotation sense around the mean magnetic field) and parallel component of the field. The polarization becomes more circular and the parallel component enhances at larger perpendicular wavenumbers. Analytic expression of fluctuation sense serves as a tool to identify the kinetic Alfvén mode in space plasma observations.</p>