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Wyszukujesz frazę "Semenov, A" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-13 z 13
    Tytuł:
    Vlijanie sootnoshenijj geometricheskikh parametrov upakovok na pokazatel' udel'nojj poverkhnosti
    Influence of correlations geometrical parameters of packing on index of specific surface
    Autorzy:
    Semenov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/76476.pdf
    Data publikacji:
    2015
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    packing
    specific surface
    geometrical parameter
    methodology
    calculation
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 5
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ultraviolet disinfection of activated carbon from microbiological contamination
    Autorzy:
    Semenov, A.
    Hmelnitska, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200553.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    UV irradiation
    activated carbon
    microbiological purity
    promieniowanie UV
    węgiel aktywny
    czystość mikrobiologiczna
    Opis:
    Purpose: This article aims to investigate the effectiveness of the use of ultraviolet radiation or a combination of ultraviolet radiation and ozonation in the inactivation of microorganisms in activated carbon "Silcarbon". Design/methodology/approach: Several experimental studies where ultraviolet light, a combination of UV radiation, and ozonation were used have been performed to disinfect "Silcarbon" from microbiological contaminants. Findings: Experimental results have shown that with pulsed xenon lamps and low-pressure mercury ozone lamps, satisfactory results can be obtained in which the total amount of yeast and mould fungi range from 50 CFU/g to 75 CFU/g. Research limitations/implications: It is advisable to continue the study of powder materials, including drugs, on the content of microbiological contaminants to assess their compliance with regulatory requirements. Practical implications: The application of the proposed approach to the inactivation of microorganisms allows one to obtain a safe sorbent on the content of microbiological indicators and can be successfully used in any other field to disinfection powder materials using different modes of UV irradiation. Originality/value: The originality of the article's results proposes a method of disinfection of the sorbent "Silcarbon" from moulds and yeasts for therapeutic purposes in medicine.
    Źródło:
    Archives of Materials Science and Engineering; 2022, 115, 1; 34--41
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photobiological safety of lamps and lamp systems in agriculture
    Autorzy:
    Semenov, A.
    Sakhno, T.
    Sakhno, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818789.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    UV irradiation
    photobiological safety
    UV lamp code
    promieniowanie UV
    bezpieczeństwo fotobiologiczne
    Opis:
    Purpose: The article aims to study the photobiological safety of ultraviolet radiation of UV lamps in agriculture. Design/methodology/approach: The research and analysis of the lighting characteristics of samples of LUF 80 and LE 30 lamps, which are the most widely used in the agrarian complex. Findings: Experimental studies have shown that the photobiological safety of LUF 80 lamps belongs to the low-risk group RG1, while LE 30 lamps show high risk and are thus assigned to group RG3. Research limitations/implications: It is advisable to continue studying the characteristics of lamps and lamp systems for various fields of agriculture on the market in Ukraine to assess their compliance with safety requirements. Practical implications: The application of the proposed approach allows increasing the level of labor safety in commercial greenhouses or any other industry by choosing the suitable lamps for agriculture that at present are not regulated by additional safety measures. Originality/value: The originality of the article is showing the results of the experimental data of the studies of light-technical characteristics of ultraviolet lamps for agriculture.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2021, 106, 1; 34--41
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using BOINC desktop grid to solve large scale SAT problems
    Autorzy:
    Posypkin, M.
    Semenov, A.
    Zaikin, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/305605.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    desktop grid
    Boolean satisfiability problem (SAT)
    SAT
    volunteer computing
    BOINC
    Opis:
    Many practically important combinatorial problems can be efficiently reduced to a problem of Boolean satisfiability (SAT). Therefore, the implementation of distributed algorithms for solving SAT problems is of great importance. In this article we describe a technology for organizing desktop grid, which is meant for solving SAT problems. This technology was implemented in the form of a volunteer computing project SAT@home based on a popular BOINC platform.
    Źródło:
    Computer Science; 2012, 13 (1); 25-34
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of sinkingeffect in container stack
    Autorzy:
    Kuznetsov, A. L.
    Kirichenko, A. V.
    Semenov, A. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/116631.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    containerization
    container stack
    container
    TEU
    sinking effect
    container logistics
    container terminal
    container cargo-handling system
    Opis:
    The container yard is the key element of any modern container terminal. The huge amount of boxes dwelling on the operational areas of the terminals could occupy a lot of space, since one-time storage capacity of the container mega terminal handling over one million TEUs annually is something around 20 000 TEUs. The ecological pressure imposed on modern container terminal does not permit to allocate for this storage large land areas, thus forcing the box stacks grow high. The selection of the individual boxes becomes a complex and time-consuming procedure, demanding a lot of technological resources and deteriorating the service quality. The predicted combinatorial growth of redundant moves needed to clear the access to the individual container is aggravated by the well-known and widely discussed ‘sinking effect’, when containers arrived earlier are gradually covered by the ones arriving afterwards. While the random selection could be adequately assessed by combinatorial methods, the ‘sinking effect’ allows neither intuitive consideration, nor any traditional mathematical means. The only practical way to treat this problem today is in simulation, but the simulation itself causes yet another problem: the problem of model adequacy. This study deals with one possible approach to the problem designated to prove its validity and adequacy, without which the simulation has naught gnoseological value.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 1; 159-162
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Box Selectivity in Different Container Cargo-handling Systems
    Autorzy:
    Kuznetsov, A. L.
    Kirichenko, A. L.
    Semenov, A. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/116336.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    cargo handling
    box selectivity
    cargo handling system
    container
    container cargo-handling system
    simulation model
    theoretical selectivity
    artificial intelligence
    Opis:
    The box selectivity in operational stack of container terminal is a quite common and long studied question. The pure random choice is governed by the theory of probability offering some combinatorial estimations. The introduction of operational rules like import/export separation, storage by shipping lines, sorting by rail or truck transportation etc., as well as the most notorious ‘sinking’ effect, i.e. covering of boxes arrived earlier by next cargo parties – all these blur the clear algebraiс picture and lead to appearance of many heuristic outlooks of the problem. A new impetus to this problem in last decades was given by the rapid development of IT, AI and simulation techniques. There are quite many examples of the models described in the scientific publication reflecting many real and arbitrary terminals, which embed very advanced and complicated mechanisms reflecting selected features and strategies. Unfortunately, these models usually are created ad hoc, with some pragmatic objectives and under the demand of closest possible proximity to the simulating objects. There are much less models designated to pure scientific study of the deep inner mechanisms responsible for the primal behavior of the operating container stack, enabling to introduce step by step new rules and restrictions, providing regular proving of every next stage’s adequacy and easy to use. This paper describes one attempt of this kind to create a new theoretical tool to put into the regular toolkit of the container terminal designer. The study starts with mathematical (combinatorial) considerations, proceeds with some restrictions caused by physical and technological characteristics, and ends up with the simulation model, which adequacy is confirmed by practical results.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 797-801
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Absorption in Periodic InN:In Structures
    Autorzy:
    Plotnikov, D. S.
    Shubina, T. V.
    Jmerik, V. N.
    Semenov, A. N.
    Ivanov, S. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047375.pdf
    Data publikacji:
    2007-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.66.-w
    71.45.Gm
    Opis:
    Optical absorption measurements were exploited to study periodic InN:In structures grown by plasma-assisted molecular beam epitaxy with the thickness of the metallic inclusions varied from 2 to 48 monolayers. We demonstrate that the observed higher-energy shift of an effective absorption edge may be due to In depletion of the InN matrix via the coalescence of In into large clusters, accompanied by the respective higher-energy shift of the Mie resonance. The relevant uncertainty in the optical gap of InN is discussed.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 2; 191-196
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magneto-Optical Studies of Narrow Band-Gap Heterostructures with Type II Quantum Dots InSb in an InAs Matrix
    Autorzy:
    Mukhin, M.
    Terent'ev, Ya.
    Golub, L.
    Nestoklon, M.
    Meltser, B.
    Semenov, A.
    Solov'ev, V.
    Sitnikova, A.
    Toropov, A.
    Ivanov, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1492858.pdf
    Data publikacji:
    2011-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.-c
    71.70.Ej
    78.55.Cr
    78.67.Hc
    78.20.Ls
    75.40.Mg
    Opis:
    Magneto-optical properties of type II heterostructures with InSb/InAs quantum dots has been studied at external magnetic field applied in the Faraday geometry. The emission polarization degree can be changed in the range from 100% σ-minus to 10% σ-plus due to excitation intensity and temperature variation. The detailed calculation of the band structure within a tight-binding approximation is presented. The simulation of the experimental data reveals that the oscillator strength of the optical transitions involving electrons with the spin oriented along and opposite to the magnetic field vector differs by approximately 1.8 times in the heterostructures under study.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 5; 868-869
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    InSb Quantum Dots in an InAsSb Matrix Grown by Molecular Beam Epitaxy
    Autorzy:
    Semenov, A. N.
    Solov'ev, V. A.
    Meltser, B. Ya.
    Lyublinskaya, O. G.
    Terent'ev, Ya. V.
    Sitnikova, A. A.
    Ivanov, S. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044535.pdf
    Data publikacji:
    2005-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.55.Cr
    78.67.Hc
    81.07.Ta
    81.15.Hi
    81.16.Dn
    Opis:
    We report on molecular beam epitaxy of InSb insertions in InAs and InAsSb matrices, emitting at wavelengths beyond 4μm. Different growth techniques for deposition of InSb quantum dots in the 1-2 monolayer range of the InSb nominal thickness, namely conventional molecular beam epitaxy and migration enhanced epitaxy, as well as different matrices (InAs and InAsSb) have been employed for increasing the emission wavelength of the InSb/InAs nanostructures. The formation of InSb quantum dots has been studied in situ using reflection high energy electron diffraction and ex situ by using transmission electron microscopy. The peculiarities of In(Ga)AsSb alloys growth and compositional control are also discussed. Bright photoluminescence up to 4.5μm has been observed at 80 K.
    Źródło:
    Acta Physica Polonica A; 2005, 108, 5; 859-865
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Потенциал влаги в условиях фазового перехода почвенного раствора в дерново-подзолистой почве
    The moisture potential in conditions of phase transition of soil solution in sod-podzolic soil
    Autorzy:
    Muromcev, N. A.
    Anisimov, A. B.
    Mazhayskiy, Yu. A.
    Semenov, N. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2065506.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    atmospheric precipitation
    total evaporation
    moisture potential
    soil temperature
    moisture exchange
    aeration zone
    lowest moisture capacity
    diffusion of moisture
    Opis:
    Установлено новое явление резкого скачкообразного повышения потенциала влаги при переходе положительных значений температуры почв через ноль в область отрицательных величин. Процесс протекает в условиях фазового перехода почвенного раствора при стабильном состоянии всех других параметров среды, за исключением температуры почвы. Понижение потенциала влаги (при постоянной влажности) в условиях повышения температуры объясняется возрастанием подвижности и активности ионов влаги. Понижение температуры обусловливает возрастание потенциала в связи с понижением активности и подвижности ионов воды. Данное явление аналогично снижению содержания влаги в почве. Суточные изменения температуры почвы и потенциала почвенной влаги незначительны и лежат в пределах 0,1÷1,9°С и 2÷3 кПа соответственно.
    A new phenomenon of a sharp jump - like increase of the moisture potential is established in the transition of positive soil temperature values through zero to the region of negative values. The process proceeds under conditions of a phase transition of the soil solution with the stable state of all other soil parameters. The decrease of the moisture potential (at constant humidity) under conditions of temperature increase is explained by the increase in mobility and activity of moisture ions. The decrease in temperature causes an increase in the potential due to a decrease in the activity and mobility of water ions. This phenomenon is similar to reducing the moisture content in soil. Daily changes in soil temperature and soil moisture potential are insignificant and is in the range 0.1÷1.9°C and 2÷3 kPa respectively.
    Źródło:
    Budownictwo o Zoptymalizowanym Potencjale Energetycznym; 2018, 7, 1; 57--66
    2299-8535
    2544-963X
    Pojawia się w:
    Budownictwo o Zoptymalizowanym Potencjale Energetycznym
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diluted Magnetic Semiconductor Investigations in Ukraine. Nature of Some Additional Lines in QW Optical Spectra
    Autorzy:
    Ryabchenko, S. M.
    Abramishvili, V. G.
    Komarov, A. V.
    Semenov, Yu. G.
    Kyrychenko, F. V.
    Dubowski, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968990.pdf
    Data publikacji:
    1998-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.55.Et
    Opis:
    The general review of the history and present-day situation of diluted magnetic semiconductor investigation in Ukraine is given by S. Ryabchenko. Some noteworthy results of diluted magnetic semiconductor investigation obtained in Ukraine are pointed out. The main features of the present day situation are mentioned also. As an example of last diluted magnetic semiconductor investigations, the new result obtained by Abramishvili, Komarov, Ryabchenko, Semenov, Kyrychenko and Dubowski for Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te/CdTe/Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te quantum well structures grown by laser ablation method are presented. A weak additional line was observed in the reflectivity spectra of a 27 Å wide quantum well with x= 0.11 in the barrier. Such additional line has not been observed in spectra of similar molecular beam epitaxy grown structures. Based on the theoretical computations of the energies and the relation of intensities of the main and additional lines we conclude that this line might be associated with hh2 → e1 transitions, which ceases to be forbidden in the presence of technologically caused asymmetry of quantum well potential profile.
    Źródło:
    Acta Physica Polonica A; 1998, 94, 2; 165-176
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possibilities of improving a rail vehicle running safety with independently rotating wheels
    Autorzy:
    Mikhailov, Evgeny
    Semenov, Stanislav
    Shvornikova, Hanna
    Dižo, Ján
    Blatnický, Miroslav
    Droździel, Paweł
    Kravchenko, Kateryna
    Powiązania:
    https://bibliotekanauki.pl/articles/2176117.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    rail vehicle
    running safety
    independently rotating wheels
    mathematical calculation
    pojazd szynowy
    bezpieczeństwo jazdy
    niezależnie obracające się koła
    obliczeniA matematyczne
    Opis:
    This work is focused on the possible ways of improving the running safety of a railway vehicle, which uses IRWs (independently rotating wheels) in a bogie. It discusses the main positive and negative properties of an application of IRWs for a railway vehicle while it is running in a curve. There are evaluated running properties of a railway vehicle in terms of safety for IRWs and a standard wheelset (SW). It is assumed that a wheelset design with IRWs will reduce the risk of derailment of a railway vehicle in a curve with a smaller radius because it will be reached a more favourable distribution of decisive forces in the wheel/rail contact. A designed wheelset with IRWs differs from other IRWs designs; in this case, only a flange can rotate independently from a wheel treat surface about the axis of rotation. Further, this research presents an analysis of a friction forces distribution of the friction forces in a contact of a flange and a rail head and a comparison with an SW. The obtained results allow concluding that it is advisable to use the wheels with the perspective wheel design (including independently rotating) to reduce the resistance to movement and improve the running properties of a railway vehicle for safety.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2022, 115; 93--106
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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