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Wyszukujesz frazę "Martyniuk, O." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
Idea Smart City w kontekście rozwoju przedsiębiorczości na przedmieściach
Smart City Concept in the Context of Enterpreneurship Development in Suburban Areas
Autorzy:
Martyniuk-Pęczek, J.
Parteka, T.
Martyniuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/2031515.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sector business
Smart City
SME
suburbanisation
Opis:
Supporting innovation and knowledge within economic development, these are the goals of public managers, enthusiasts of the Smart City concept. It is questioned whether this concept is the best solution for regional development and efficient support to local entrepreneurship based on SMEs (small and medium enterprises). Moreover, the results of the nationwide survey state that the local authorities and entrepreneurs perceive the efficiency of local policy totally different. In order to co-ordinate requirements of entrepreneurs and urban policy proposals, authors attempted to analyse economic – spatial relation of SME development in suburban areas in comparison to the city centres in Gdańsk Metropolitan Region. The paper presents the correlation between entrepreneurship development and the urban processes in the contemporary metropolitan area. The authors combine their research and experience from the field of microeconomy and the field of urban planning. Research results of intensive enterpreneural activity in the suburban areas are extraordinary in the context of city development.
Źródło:
Biuletyn Komitetu Przestrzennego Zagospodarowania Kraju PAN; 2015, 257-258; 119-143
0079-3493
Pojawia się w:
Biuletyn Komitetu Przestrzennego Zagospodarowania Kraju PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical modelling of heat transfer in a greenhouse with surface soil heating system
Autorzy:
Hud, V.
Pinchuk, O.
Martyniuk, P.
Gerasimov, I.
Volk, P.
Powiązania:
https://bibliotekanauki.pl/articles/887211.pdf
Data publikacji:
2019
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Scientific Review Engineering and Environmental Sciences; 2019, 28, 4[86]
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of temporary decommissioning impact on reliability and durability of oil pipelines
Autorzy:
Poberezhny, L.
Martyniuk, R.
Stanetsky, A.
Poberezhna, L.
Tkach, O.
Hrytsanchuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/367993.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
oil pipeline
conservation
temporary decommissioning
probability of non-destruction
pipeline steel 13G1S-U
rurociąg naftowy
konserwacja
wycofanie tymczasowe z eksploatacji
prawdopodobieństwo nieniszczenia
stal rurociągowa
Opis:
Purpose: Due to changes in the volume of oil transportation, part of the pipelines must be temporarily decommissioned. The purpose of the work is theoretical and experimental study of pressure fluctuations during operation of oil pipelines and their impact on the durability of the pipeline material in work state and after temporary decommissioning (conservation). Design/methodology/approach: The results of oil pressure fluctuation research have given a chance to choose the terms of experimental research providing of the pipe metal mechanical features changes research during oil pipeline exploitation. Findings: Fatigue test modes are selected based on the calculations of the mathematical model developed. Experimental studies of the dependence of the fatigue strength of the pipe material on the conditions of operation have been carried out, which made it possible to determine the parameters of the fatigue curve of the samples. Has been defined that fatigue strength for the new metal pipe samples is more for 20-25% than for the metal samples which had the contacts with lime milk and for 30-40% more than for metal samples which were under exploitation. Research limitations/implications: In the future, more combination of "pipe material - preservation medium" should be explored to establish pain of general regularities. Practical implications: The probabilistic curves of the pipeline non-destruction are constructed, which will be used for practical calculations of the reliability and durability of the 13G1S-U steel pipelines. Originality/value: Mathematical model is made that describes non-stationary oil moves in oil pipeline, that has been caused by jump like changes of oil supply in oil pipeline, on this basis was defined, that oil pressure in oil pipeline provides within non stationary process in a range of 0.4-0.6 Hz frequency and amplitude fluctuation of pressure is 0.1-0.5 MPa.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2019, 94, 1-2; 22-31
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mid-wave InAs/GaSb superlattice barrier infrared detectors with nBnN and pBnN design
Autorzy:
Gomółka, E.
Markowska, O.
Kopytko, M.
Kowalewski, A.
Martyniuk, P.
Rogalski, A.
Rutkowski, J.
Motyka, M.
Krishna, S.
Powiązania:
https://bibliotekanauki.pl/articles/201992.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
InAs/GaSb type-II superlattices
infrared detectors
barrier detectors
nBn detector
p-i-n detector
InAs
GaSb
detektory podczerwieni
detektor bariery
detektor nBn
detektory p-i-n
Opis:
We present an investigation of optical and electrical properties of mid-wavelength infrared (MWIR) detectors based on InAs/GaSb strained layer superlattices (SLs) with nBnN and pBnN design. The temperature-dependent behavior of the bandgap was investigated on the basis of absorption measurements. A 50% cut-off wavelength of around 4.5 μm at 80 K and increase of up to 5.6 μm at 290 K was found. Values of Varshni parameters, zero temperature bandgap E0 and empirical coefficients α and β were extracted. Arrhenius plots of dark currents of nBnN and pBnN detectors were compared with the p-i-n design. Dark current density reduction in nBnN and pBnN detectors is observed in comparison to the p-i-n device. This shows a suppression of Shockley-Read-Hall (SRH) processes by means of introducing barrier architecture.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 3; 317-323
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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