1,059 research outputs found
EAS spectrum in the primary energy region above 10 to the 15th power eV by the Akeno and Yakutsk array data
The extensive air showers spectrum on scintillation desity Rko in primary energy region E sub approx. 10 to the 15th power - 10 to the 20th power eV on the Yakutsk array data and recent results of the Akeno is given
Microstructure and phase composition of cold Isostatically pressed and pressureless sintered silicon nitride
The microstructure and physical properties of new Y₂O₃ and Al₂O₃ oxide-doped silicon nitride ceramics fabricated by cold isostatic pressing and free sintering were investigated. The phase composition of produced material was also studied by X-ray diffraction at room and elevated temperature. The fabricated ceramics featured a microstructure of Si₅AlON₇ grains with a fine-grained α-Si₃N₄ with a small amount of Y₂SiAlON₅. Described ceramics is attractive for many high-temperature structural applications due to beneficial combination of fine-grained structure with improved mechanical properties and small weight los
Polymers pushing Polymers: Polymer Mixtures in Thermodynamic Equilibrium with a Pore
We investigate polymer partitioning from polymer mixtures into nanometer size
cavities by formulating an equation of state for a binary polymer mixture
assuming that only one (smaller) of the two polymer components can penetrate
the cavity. Deriving the partitioning equilibrium equations and solving them
numerically allows us to introduce the concept of "polymers-pushing-polymers"
for the action of non-penetrating polymers on the partitioning of the
penetrating polymers. Polymer partitioning into a pore even within a very
simple model of a binary polymer mixture is shown to depend in a complicated
way on the composition of the polymer mixture and/or the pore-penetration
penalty. This can lead to enhanced as well as diminished partitioning, due to
two separate energy scales that we analyse in detail.Comment: 10 pages, 6 figure
Some of the features of the viscoplastic media
The article considers the influence of the structure and the chemical composition of ground blast furnace slag on rheological properties of slag suspensions. Different composition and structure of blast furnace slags were studie
All particle energy spectrum of cosmic rays in 10 to the 15th power - 10 to the 20th power eV region
Average estimations of the shower energy components are presented and their sum gives E sub 0 (Rho sub 600) - an average function of the relation of E sub 0 with the shower size parameter Rho sub 600 measured at the Yakutsk extensive air showers (EAS) array. Using this relation to the EAS spectrum obtained at the Akeno and Yakutsk arrays the energy spectrum of the cosmic ray total flux within 15 lg (E sub 0,eV) 20 by the EAS methods is recovered
Fluctuations of development maximum depth and nuclear composition of primary cosmic radiation
The extensive air showers (EAS) cascade curves from the Cerenkov light lateral distribution measurements are recovered and the maximum depth fluctuations of the shower development theta x sub m both on the Cerenkov and charged EAS components are defined. At E sub 0 approximates 10 to the 18th power eV the mean content of protons is greater than 85%, and p-air cross section theta sub 0 p-air 750mb
Dependence of the Energy Spectrum of UHE Cosmic Rays on the Latitude of an Extensive Air Shower Array
Several energy spectra of cosmic rays with energies E_0 \geq 10^17 eV
measured at the Yakutsk EAS, AGASA, Haverah Park, HiRes, Auger, and SUGAR
arrays are considered. It is shown that the fairly good mutual agreement of the
spectrum shapes can be achieved if the energy of each spectrum is multiplied by
a factor K specific for each spectrum. These factors exhibit a pronounced
dependence on the latitude of the above-mentioned arrays.Comment: 4 pages, 4 figure
On athermic mechanism of materials radiation embrittlement
To elucidate the mehanisms of radiation embrittlement of materials the temperature dependence of mechanical properties of irradiated materials has been studiedyesBelgorod State Universit
Fostering Eurasian Integration: The Role of Business in Services and Trade Policy Cooperation Development
The research paper examines some aspects of trade and economic cooperation in the Eurasian Union in services and trade policy. The authors consider key challenges and difficulties affecting prospects of sustainable Eurasian integration. The article stresses the need to harmonize and unite efforts of the Eurasian state bodies and businesses in order to increase the integration policies efficiency in a new environment based on reasonable application of national experience and expertise
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