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Wyszukujesz frazę "Andrzejewski, P." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Analysis of LDV operation manner in terms of its environmental and economical indexes
    Autorzy:
    Nowak, M.
    Fuc, P.
    Andrzejewski, M.
    Rymaniak, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/245068.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    exhaust emission
    road transport
    RDE
    PEMS
    ecodriving
    Opis:
    Environmental protection is becoming an increasingly important issue in every area of life. In recent times, a great emphasis has been placed on reducing the negative impact of automotive on human health at every stage of the vehicle's life. The most common impact of cars on the environment is the emission of pollutants from the exhaust system, created during the combustion of fuels in internal combustion engines. For this purpose, legislators introduce emission standards that must be met at the stage of vehicle approval for a given market. To meet these requirements, vehicle manufacturers modify the design of the drive units, body, and chassis to reduce weight and improve aerodynamic properties. This approach is methodologically correct because it is possible to compare the results obtained for different vehicles, but in real operation the level of harmful exhaust compounds, emissions and fuel consumption depend very much on the way the vehicle is used. As a manner of operation one can understand a variable load in the form of passengers or cargo, driving style, share of urban, extra-urban and motorway driving, terrain formation, ambient temperature and others. This article addresses issues related to the assessment of the impact of the light commercial vehicle operation manner on fuel consumption and the emission of harmful exhaust compounds. The problem was analysed in terms of the difference in vehicle load and driving style. Exhaust emission measurements were carried out using PEMS (Portable Emission Measurement System) analysers, which are state of the art devices for measuring exhaust emission in real operating conditions, called RDE (Real Driving Emissions).
    Źródło:
    Journal of KONES; 2018, 25, 4; 317-323
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biomechanical properties of alternative suture technique for flexor tendon repair
    Autorzy:
    Andrzejewski, T.
    Czarnecki, P.
    Dąbrowski, M.
    Spławski, R.
    Rogala, P.
    Romanowski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/307209.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    obrażenia ciała
    szew
    wytrzymałość na zerwanie
    flexor injuries
    multistrand running suture
    modified Kessler suture
    suture breaking strength
    Opis:
    Purpose: Flexor injuries are most common in the hand and require special attention and experience from the surgeon. Both quality and technique affect the stability of the suture. The selection of the optimum method will influence the process of rehabilitation. The aim of this study was to compare three different suture techniques based on the strength, depending on the method of breakage, i.e., axial or pulley load. Methods: The study was divided into six sessions. The research material was dissected deep flexor porcine tendons. Three types of stitches were used: the modified Kessler suture with an additional running suture, the cruciate four-strand suture with an additional running suture and the multistrand running suture. We obtained 120 sutures, 40 for each technique. Breaking strength was assessed using a tensile machine in two ways, i.e., axial or pulley load, with 20 sutures per group. Results: The strongest suture for both axial and pulley load was the cruciate four-strand suture. Between the multistrand running suture and the modified Kessler suture, there was no statistically significant difference in the strength of breaking for both axial and pulley load. Comparing the two ways of breaking, there was no statistically significant difference in the strength of the suture. Conclusions: The multistrand running locking suture is a good alternative to widely used core sutures. It not only provides the same strength as other techniques examined by us but also reduces the procedure time and trauma to the tips of the tendon.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2017, 19, 1; 167-172
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Compensated ionization chamber for (n,α) reaction measurements at a spallation neutron source
    Autorzy:
    Andrzejewski, J.
    Yu, M.
    Gledenov, M.
    Korejwo, A.
    Sobczak, K.
    Szałański, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/146570.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    ionization chamber
    pulsed neutron source
    Opis:
    The new spallation neutron facility n_TOF (neutron time-of-flight) at CERN opens wide possibilities in measurements of neutron induced reaction cross sections. The facility with its excellent energy resolution of neutrons, low repetition rate and most important – with a very high instantaneous luminosity, makes up an extra challenge for experimenters faced by doing measurements at a high peak intensity spallation source. Our proposition is directed to the use of a compensated ionization chamber for the (n, alpha) reaction cross section measurements we plan to carry out in a wide range of neutron energy. First experience gained with using such a kind of detector at ORELA (the Oak Ridge Electron Linear Accelerator) neutron source (ORNL) was very optimistic.
    Źródło:
    Nukleonika; 2007, 52, 2; 51-57
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The environmental and social costs of the intermodal transport of semi-trailers by rail
    Autorzy:
    Merkisz-Guranowska, A.
    Czerwinski, J.
    Andrzejewski, M.
    Daszkiewicz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/245971.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    railway
    intermodal transport
    semi-trailer
    environmental costs
    social costs
    Opis:
    The dynamic development of transport recorded in recent decades is an important factor in the economic development of the world on the one hand, and on the other hand, it is a significant source of nuisance and environmental problems. The adverse impact of transport can be felt both in the natural environment and in society, where the dynamic development of this sector has enabled significant civilization development, with the effects varying depending on the level of economic development, the degree of advancement and use of the various transport sectors, geographical location (including climate), and also the sensitivity of the elements of the environment. Considering contemporary transport hazards, it is important to prevent them from occurring, and when that is not possible – limiting their impact on the environment and reducing the scale and extent of negative impacts. In the article, the environmental and social nuisance of transport of goods loaded in semitrailers was analysed. The transport of semitrailers using intermodal wagons pulled by the diesel locomotive in accordance with the assumptions adopted in the railway with the maximum length of train composition was taken into account.
    Źródło:
    Journal of KONES; 2017, 24, 3; 199-201
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Legal conditions in the aspect of pollutant emissions from exhaust systems of rail vehicles engines
    Autorzy:
    Merkisz, J.
    Pielecha, I.
    Andrzejewski, M.
    Daszkiewicz, P.
    Stawecki, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/950157.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    rail vehicles
    combustion engines
    exhaust emission
    research tests
    transport
    environmental protection
    pojazdy szynowe
    silniki spalinowe
    emisja spalin
    testy badawcze
    ochrona środowiska
    Opis:
    One of the main objectives of the European transport policy is to increase the share of alternative modes of transport – revitalization of rail transport, promotion of water transport and development of intermodal transport, which will help to reduce the dominance of road transport. The adverse impact of transport can be felt both in the natural environment and in society, where the dynamic development of this sector has enabled significant civilization development, with the effects varying depending on the level of economic development, the degree of advancement and use of the various transport sectors, geographical location (including climate), and also the sensitivity of the elements of the environment. Considering contemporary transport hazards, it is important to prevent them from occurring, and when that is not possible – limiting their impact on the environment and reducing the scale and extent of negative impacts. The impact of rail transport on the environment and safety is much lower compared to road transport. The impact of rail transport on the environment mainly comes from the emission of noise and vibration, pollution (from diesel locomotives) and land occupation. The article presents information on the current legal conditions regarding the emission of pollutants from rail vehicles. Information with reference to research tests and emission limit values was included. The subject of tests in real traffic conditions was also mentioned as the direction of changes in vehicle homologation tests.
    Źródło:
    Journal of KONES; 2018, 25, 1; 257-264
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High-Pressure Microwave Study of YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$-Pb(Sc$\text{}_{0.5}$Ta$\text{}_{0.5}$)O$\text{}_{3}$ Composite
    Autorzy:
    Czyżak, B.
    Stankowski, J.
    Hilczer, B.
    Krupski, M.
    Morawski, P.
    Andrzejewski, B.
    Marfaing, J.
    Régnier, S.
    Caranoni, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964222.pdf
    Data publikacji:
    1997-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    77.80.-e
    Opis:
    The ferroelectric relaxor Pb(Sc$\text{}_{0.5}$Ta$\text{}_{0.5}$)O$\text{}_{3}$-superconductor YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$ 50% in weight composite exhibits the onset critical temperature T$\text{}_{c}$=95 K. High pressure studies yield the factor dT$\text{}_{c}$/dp of 1.0 K/GPa, close to the value observed for a pure YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$ compound. The microwave absorption studies show the significant role of the intergrain weak links.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 6; 1103-1109
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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