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Wyszukujesz frazę "Markin, V." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Predvaritel'naja ochistka stochnykh vod s pomoshh'ju probioticheskikh sredstv
    Provisional wastewater treatment by probiotic agents
    Autorzy:
    Nasonkina, N.
    Markin, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/78082.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    waste water
    probiotic
    microorganism
    sewage treatment plant
    activated sludge
    total suspended solid
    ammonia nitrogen content
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 6
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New Materials of RMn$\text{}_{2}$Ge$\text{}_{2}$ Type for Thermomagnetic Devices
    Autorzy:
    Markin, P. E.
    Zemlyanskii, S. V.
    Baranov, N. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964624.pdf
    Data publikacji:
    1997-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.Lp
    72.15.Jf
    75.30.Gw
    Opis:
    The new type of the working media for thermomagnetic devices is proposed: the intermetallic compounds which have large magnetocrystalline anisotropy and exhibit the spontaneous phase transition from the antiferromagnetic (AF) to ferromagnetic (F) state when the temperature increases above the critical value T$\text{}_{t}$. Moreover, the anisotropy in AF state in the fields below the critical AF-F transition field must be much lower than in the F state. In the present paper the Gd$\text{}_{0.6}$Sm$\text{}_{0.4}$Mn$\text{}_{2}$Ge$\text{}_{2}$ compound belonging to the tetragonal RMn$\text{}_{2}$Ge$\text{}_{2}$ system is investigated. This compound has the critical temperature T$\text{}_{t}$ = 280 K. The thermomagnetic cycle can be realized on the AF-F-AF transition near T$\text{}_{t2}$. The interval of the working temperatures can be shifted with the change of the Gd and Sm concentration.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 2; 327-330
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Contactless ultrasonic method for determining knitted fabrics tension
    Autorzy:
    Zashchepkina, N. M.
    Zdorenko, V. G.
    Markin, M. O.
    Barilko, S. V.
    Shipko, D. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2172163.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    tension of textile fabric
    amplitude of ultrasonic waves
    contactless control
    through pores of the material
    interfibre porosity
    naprężenia
    tkanina tekstylna
    amplituda
    fale ultradźwiękowe
    sterowanie
    matariał porowaty
    porowatość włókna
    Opis:
    Purpose The values of the measured amplitudes of ultrasonic vibrations that have passed the controlled material have been obtained. These values were compared with the amplitude of the waves passing through the fabric sample when the initial tension was applied to it. After that, the total current value of the tension of each sample of the knitted fabric in its three zones was determined. The distribution of the total tension in different zones of the sample material was also determined. Design/methodology/approach It has been established that the amplitude of ultrasonic waves passing through different zones of the textile material can be used to determine the tension of the knitted fabric over the entire width of its fabric. Findings The possibility and expediency of determining the fabric tension on knitting equipment by using the ultrasonic contactless method has been shown. The tension of the knitted fabric in its manufacture is the main technological parameter, the value of which determines the physical, mechanical and consumer properties of the finished fabric, especially basis weight. The use of operational technological control of the tension of knitted fabrics directly during their production will improve the quality of finished products, and, accordingly, the reliability of use in personal protective equipment, in particular in body armour. It has been proposed to determine the tension of knitted fabrics in their production on knitting equipment by changing the amplitude of ultrasonic waves passing through the material under the action of tension, which also changes during the movement of the process equipment. The proposed contactless method is quite promising, since it has a number of significant advantages over the existing contact methods. In the course of the research, experimental measurements of the amplitude of ultrasonic waves have been carried out. These waves passed through samples of fabric of various materials while stretching. The samples of knitted fabrics were irradiated with an ultrasonic pulse signal with a wave frequency of 40 kHz. The samples of knitted fabrics from 58x2 Tex Kevlar threads and high molecular weight 44x3 Tex polyethylene yarns with double weave 1x1 elastic have been taken as a basis for the research. Research limitations/implications For textile fabrics, the structure of which does not allow stretching through pores under the action of tension, it is necessary to additionally adjust the contactless sensors in frequency and capacity depending on the corresponding sample. Practical implications The values of the measured amplitudes of ultrasonic vibrations that have passed the controlled material have been obtained. These values were compared with the amplitude of the waves passing through the fabric sample when the initial tension was applied to it. After that, the total current value of the tension of each sample of the knitted fabric in its three zones was determined. The distribution of the total tension in different zones of the sample material was also determined. Originality/value The dependences of the amplitude of ultrasonic waves, transmitted through the textile material in its different zones, on the value of the total tension, and on the value of the distribution of the tension of the fabric over its entire width were obtained. The deviations δP of the tension display between the determination of this parameter by the standard and ultrasonic methods are shown. The deviations δU between the amplitudes of waves passing through different zones of the controlled fabric are also determined.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2022, 112, 1; 13--24
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ultrasonic method of quality control for textile materials
    Autorzy:
    Zashchepkina, N. M.
    Zdorenko, V. G.
    Tierentyeva, N. R.
    Markina, O. M.
    Markin, M. O.
    Bozhko, K. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/378534.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    control
    quality
    textile materials
    ultrasonic method
    kontrola
    jakość
    materiały tekstylne
    metoda ultradźwiękowa
    Opis:
    Purpose: The ultrasonic amplitude method for controlling the surface texture density of textile materials was first studied and used. Design/methodology/approach: For the first time, the surface texture density has been determined. The research was conducted using the ultrasonic method, rather than by mathematical calculations, which made it possible to invent a new approach to contactless quality control of textile materials. In order to identify the functionality of bicomponent textile material, formed from raw materials with opposite hygroscopic properties, two-layer knitted fabrics were chosen to protect the human respiratory organs. As a hydrophilic type of raw material used yarn with composition is as follows – cotton 34%, flax 33%, viscose 33%, and in the function of a hydrophobic raw material, polypropylene multifilament yarn. Using the ultrasonic method, studies of a new type of knitwear were carried out, the values of the surface density of the material were obtained. Products from this composition provide respiratory protection from dust and comfortable work in the area of road repairs up to 8 hours. Findings: The combination of natural and synthetic materials for individual masks allowed them to be used under different operating conditions. The problem of structure and design of materials was resolved through the use of computer technology and computer-aided design of textiles, and the possibility of applying the ultrasonic amplitude method to control the surface density of textile materials was substantiated. During the analysis of the results of experimental studies, it was found necessary to ensure the uniformity of the physical and mechanical properties of textile materials in the production process. Using the ultrasonic method, the thickness gauge was used to determine the surface density of various materials for the manufacture of personal protective equipment for road maintenance workers. Research limitations/implications: The method of measurement has been tested and has no limitations. However, the study was conducted on samples of textile materials that were manufactured in Ukraine and according to patents of authors. Practical implications: Individual masks for the protection of human respiratory organs are recommended for use by road workers and cyclists. Originality/value: The originality of the results of the article is the experimental data of studies on the content of textile materials and the accuracy of measuring their surface density by an ultrasonic contactless device.
    Źródło:
    Archives of Materials Science and Engineering; 2019, 97, 1/2; 39-49
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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