The purpose of the work is to study the effectiveness of breeding work in dairy cattle breeding. The main indicators of efficiency in dairy cattle breeding are systematized, specific indicators for ...dairy cattle breeding are highlighted. Analysis of the dynamics of milk production showed the dependence of the development of the industry on government support measures, allowed to extract reserves for production growth. It was concluded that in terms of productivity per cow per year, the Sychevsk and brown Schwyz breeds are inferior to the Holstein breed, but the duration of use, the service period and the output of calves in Holstein breed are much lower. The lifetime productivity of these breeds was calculated. It is concluded that the genetic potential is not fully disclosed in any breed.
The Compact Linear Collider (CLIC) is an option for a future
e
+
e
-
collider operating at centre-of-mass energies up to
3
TeV
, providing sensitivity to a wide range of new physics phenomena and ...precision physics measurements at the energy frontier. This paper is the first comprehensive presentation of the Higgs physics reach of CLIC operating at three energy stages:
s
=
350
GeV
, 1.4 and
3
TeV
. The initial stage of operation allows the study of Higgs boson production in Higgsstrahlung (
e
+
e
-
→
Z
H
) and
W
W
-fusion (
e
+
e
-
→
H
ν
e
ν
¯
e
), resulting in precise measurements of the production cross sections, the Higgs total decay width
Γ
H
, and model-independent determinations of the Higgs couplings. Operation at
s
>
1
TeV
provides high-statistics samples of Higgs bosons produced through
W
W
-fusion, enabling tight constraints on the Higgs boson couplings. Studies of the rarer processes
e
+
e
-
→
t
t
¯
H
and
e
+
e
-
→
H
H
ν
e
ν
¯
e
allow measurements of the top Yukawa coupling and the Higgs boson self-coupling. This paper presents detailed studies of the precision achievable with Higgs measurements at CLIC and describes the interpretation of these measurements in a global fit.
The article describes the main trends in the consumption of milk in Russia. The state of the milk market is characterized by a mismatch between production and consumption. The consumption of milk and ...dairy products is characterized by an increase in the production of healthy dairy products, fortified, dairy, organic products, the impact of the share of imports on the demand for domestic milk and dairy products, the effect of solvency on the demand for dairy products.
The cortical formations of the brain involved in visual functions (the occipital and temporo-parieto- occipital areas, the oculomotor area of the prefrontal cortex), as well as the motor cortex in ...the representation zone of the arm and the medial region of the frontal cortex adjacent to the limbic lobe, were studied in post-mortem material. The thickness of the cortex and cortical layer III, the sizes of pyramidal neurons, the specific volumes of neurons and intracortical vessels were studied in subjects of both sexes, from birth to the age of 20 years, at yearly intervals (103 observations) using histological techniques, computer morphometric and stereological analysis. The thickness of the cortex of the cerebral hemispheres was observed to intensively increase from birth to the age of 3 years in the occipital, temporo-parieto-occipital and prefrontal cortical areas involved in visual recognition processes. The increase in thickness of the cerebral cortex continues until the age of 6 in the occipital cortex and in the oculomotor area, until the age of 7 years in the temporo-parietooccipital area and the medial prefrontal area, and until the age of 8–9 years in the motor cortex. The sizes of pyramidal neurons increase until the age of 6 years in the motor cortex, until the age of 8 years on the medial surface of the frontal lobe, and until the age of 9–10 years in the temporo-parieto-occipital area and in the dorsolateral area of the prefrontal cortex. The specific volume of neurons and blood vessels in the cortex of the cerebral hemispheres decreases and the volume of intracortical fibers increases throughout the ascending ontogeny, which is manifested most intensively in the prefrontal cortex.
Plastic scintillators are very often used as detecting media in sampling calorimeters of High Energy Physics (HEP). Many modern HEP experimental installations are already operating or proposed to ...work at high luminosity. Plastic scintillators are the most sensitive part of such setups in terms of their radiation hardness. Improving the light collection from the most irradiated scintillators will ensure their long-term use at high luminosity. The experimental results of the measurements for different assemblies (scintillator SCSN-81 and the WLS fiber Y-11 electron-irradiated (E≈4MeV) were obtained. Calculations of the light yields for different samples based on our experimental results show the possibility of increasing the radiation hardness of plastic scintillators inside the sampling calorimeter up to 20Mrad.
Experimental results on the Drell–Yan process obtained with the CMS detector in the first run of the Large Hadron Collider are briefly reviewed. Some original results on this process are presented, ...and the prospects for its further investigations in the second LHC run are analyzed.
This paper describes a method for direct measurement of the amplitude–frequency characteristics and the Q factor of empty superconducting niobium radio frequency Tesla-type cavities. An automated ...measuring complex that permits recording the superconductivity effect and measuring high Q values has been developed. Measurements have been made of the Q factors of the investigated objects (the first domestic 1.3-GHz niobium cavities) at a level no lower than 0.1·10
9
(with a maximum value of ~1.2·10
10
) and a level of relative losses lower than ~130 dB (with a minimum factor of ~139.7 dB) at liquid nitrogen temperature.
Detectors of the scintillator-photodiode type were obtained on the basis of CsI(Tl), CdWO
4 and ZnSe(Te) crystals, and their comparative study was carried out, aiming at their use in X-ray computer ...tomography (CT). Because of their low afterglow level (10
ppm after 10
ms), CWO and ZnSe crystals are preferable for this application. A drawback of CWO is its lower (by 3 times) light output as compared with CsI(Tl). ZnSe has low transparence to intrinsic radiation; however, up to energies of 60–70
keV it is superior, as for the whole complex of its parameter, to materials traditionally used for CT detectors. The use of a dual-energy receiving–detecting circuit with a detector pair ZnSe/CsI or ZnSe/CdWO allows efficient distinction between muscular and bone tissues, which supports our earlier theoretical assumptions that this method could be successfully used for separate detection of materials differing in their effective atomic number
Z
eff and local density (e.g., calcium contents in bone densitometry).
The FORTRAN code POLRAD 2.0 for radiative correction calculation in inclusive and semi-inclusive deep inelastic scattering of polarized leptons by polarized nucleons and nuclei is described. Its ...theoretical basis, structure and algorithms are discussed in detail.
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