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Wyszukujesz frazę "Kobets, A." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Doslidzhenniavplivu parametriv rotornykh robotsykh organiv na yakisni pokaznyky roboty rozkydachiv mineralnykh dobryv
    Research of influence of parameters of rotor workings organs in on high-quality indexes of work of throwing about of mineral fertilizers
    Autorzy:
    Kobets, A.
    Nagiieva, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/77913.pdf
    Data publikacji:
    2011
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2011, 13 C
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of stainless steel exposed to sandblasting
    Autorzy:
    Horodek, P.
    Eseev, M. K.
    Kobets, A. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/147075.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    stainless steel
    sandblasting
    defects
    positron beam
    Opis:
    The influence of sandblasting on surface and subsurface of stainless steel is investigated using variable energy positron beam (VEP), positron annihilation spectroscopy (PAS), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Samples of stainless steel were blasted using 110 μm particles of Al2O3 under different pressure and time duration. In the case of sandblasting for 90 s, the reduction of positron diffusion length depending on the applied pressure was observed. Sandblasting during 30 s leads only to the reduction of positron diffusion length to about 60 nm for all samples. Positron lifetimes close to 170 ps measured using positrons emitted directly from the source point to the presence of vacancies on the dislocation lines. SEM and AFM images show that surface roughness depends rather on pressure of sandblasting than time of exposition.
    Źródło:
    Nukleonika; 2015, 60, No. 4, part 1; 721-724
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Slow positron beam at the JINR, Dubna
    Autorzy:
    Horodek, P.
    Kobets, A. G.
    Meshkov, I. N.
    Sidorin, A. A.
    Orlov, O. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/147134.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    positron beam
    positron injector
    Opis:
    The Low Energy Positron Toroidal Accumulator (LEPTA) at the Joint Institute for Nuclear Research (JINR) proposed for generation of positronium in flight has been adopted for positron annihilation spectroscopy (PAS). The positron injector generates continuous slow positron beam with positron energy range between 50 eV and 35 keV. The radioactive 22Na isotope is used. In distinction to popular tungsten foil, here the solid neon is used as moderator. It allows to obtain the beam intensity of about 105 e+/s width energy spectrum characterized by full width at half maximum (FWHM) of 3.4 eV and a tail to lower energies of about 30 eV. The paper covers the characteristic of variable energy positron beam at the LEPTA facility: parameters, the rule of moderation, scheme of injector, and transportation of positrons into the sample chamber. Recent status of the project and its development in the field of PAS is discussed. As an example, the measurement of the positron diffusion length in pure iron is demonstrated.
    Źródło:
    Nukleonika; 2015, 60, No. 4, part 1; 725-728
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Slow Positron Beam Studies of the Stainless Steel Surface Exposed to Sandblasting
    Autorzy:
    Horodek, P.
    Dryzek, J.
    Kobets, A.
    Kulik, M.
    Lokhmatov, V.
    Meshkov, I.
    Orlov, O.
    Pavlov, V.
    Rudakov, A.
    Sidorin, A.
    Siemek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1336525.pdf
    Data publikacji:
    2014-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Bj
    82.80.Yc
    61.82.Bg
    Opis:
    The paper presents slow positron beam studies of the stainless steel grade 304 AISI samples annealed in the flow $N_2$ atmosphere and sandblasted under different pressure from 1 to 7 bar. Heating of specimens caused formation of an additional layer on the surface which can be identified as oxides. Sandblasting reduces the thickness of the oxide layer and also defects concentration (vacancies as we suppose) decreases in dependence on pressure applied during blasting. Additionally, the atomic concentrations of oxygen have been obtained using nuclear methods (Rutherford backscattering and nuclear reactions) in the near surface layers of the studied samples.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 3; 714-717
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution and natural regeneration of Tilia cordata Mill. in Ukrainian plain forests in a changing climate
    Autorzy:
    Rumiantsev, Maksym
    Luk'yanets, Volodymyr
    Kobets, Oleksii
    Obolonyk, Iryna
    Tarnopilska, Oksana
    Pozniakova, Svitlana
    Musienko, Sergiy
    Tupchii, Olha
    Powiązania:
    https://bibliotekanauki.pl/articles/2041224.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    advance growth
    associated species
    mixed stands
    productivity
    stand origin
    Opis:
    The aim of this study was to assess the current state of small-leaved lime stands under climate change, as well as to identify optimal conditions for the occurrence and further growth of natural lime regeneration under the stand canopy to grow productive and sustainable mixed stands. The areas of small-leaved lime (Tilia cordata Mill.) stands in plain Ukrainian forests and mixed stands with English oak (Quercus robur L.) were defined according to reference materials (as of 2016). Growth and liveability peculiarities of natural regeneration of lime under the canopy of oak-lime stands in climate change were identified. The main stand characteristics contributing to maximal appearance and further development of advance growth of lime, such as composition, age and relative density of stocking, were determined. It was found that the lime stands of vegetative origin occupy the largest part of the lime forests’ area, being less resilient and productive than those originated from seeds. Small-leaved lime is the best associated species in mixed oak stands. The presence of lime improves health, assortment composition, and productivity of oak stands and increases their resistance against pests and diseases. In the future, lime can play an important role in the adaptation of forests to climate change due to its biological and forest properties and adaptability to a sustainable existence in a relatively wide range of environmental conditions. A summary of the studies complements a system of knowledge about the current state of lime stands as well as peculiarities of their regeneration and growth. The data obtained can be used as a theoretical base for forest management to promote natural regeneration and maintain the sustainability of these forests.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2021, 63, 2; 125-137
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conversion of low-value stands by corridor method in Left-Bank Forest-Steppe, Ukraine
    Autorzy:
    Vedmid, M.
    Luk’yanets, V.
    Tarnopilska, O.
    Rumiantsev, M.
    Kobets, O.
    Obolonyk, I.
    Pozniakova, S.
    Musienko, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/28407579.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Badawczy Leśnictwa
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2022, 64, 3; 143-155
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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