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    Wyświetlanie 1-5 z 5
    Tytuł:
    Kierunki przebudowy obszarów wiejskich – zarys koncepcji
    Directions of Rebuilding Rural Areas – An Approach Concept
    Autorzy:
    Zioło, Zbigniew
    Powiązania:
    https://bibliotekanauki.pl/articles/2030277.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Studia komitetu przestrzennego zagospodarowania kraju PAN; 2011, 133; 43-66
    0079-3507
    Pojawia się w:
    Studia komitetu przestrzennego zagospodarowania kraju PAN
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Repair Welding of the Massive Cast
    Autorzy:
    Bęczkowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/381046.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cast defect
    rebuilding
    quality
    MAG
    welding
    wady odlewów
    przebudowa
    jakość
    spawanie
    Opis:
    The rebuilding technologies are used to develop surface of ladle. Among many welding methods currently used to obtain surface layer without defects one of the most effective way of rebuilding is using metal arc welding. This additional material gives more possibilities to make expected quality of rebuild surface. Chemical composition, property and economic factors allow to use metal wire. Because of these reasons, solid wire gives opportunity to be wildly used as material to rebuild or repair the surface in different sectors of industry. The paper shows a few ways to rebuild the surface in the massive cast with the use of metal active gas welding for repair. The work presents studies of defect in the massive cast. It contains the pictures of microstructures and defects. The method of removing defects and the results of checking by visual and penetrant testing methods are shown. The papers describes the methodology of repair the ladle with metal active gas welding, preheating process and standards non destructive testing method.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 2; 5-8
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Safe rebuilding of the periodontal loss an experimental study
    Autorzy:
    Minch, L. E.
    Słowiński, J. J.
    Scigala, K.
    Będziński, R.
    Kawala, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/200889.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FEM
    bone remodeling
    orthodontics
    periodontally compromised patients
    bone defects
    przebudowa kości
    ortodoncja
    pacjent zagrożony chorobą przyzębia
    ubytki kostne
    Opis:
    This study aimed at the simulation of bone tissue remodeling within a bone defect with the utilization of the finite element method (FEM), enabling - via elaborated application - objective evaluation of orthodontic forces which positively influence periodontium in vivo. The initial position of each bracket on the passive archwire was registered, and then a geometrical and discretemodel of the appliance was created automatically. Assessment of the dental scans obtained using cone beam computed tomography (CBCT) allowed evaluation of the range of bracket displacement: from the initial position to the final one achieved on the active archwire. Those displacements established terminal conditions in the finite element analysis, enabling calculation of orthodontic force levels. An individual design of a tooth with periodontal ligaments and the periodontal defect subsequently loaded with the determined forces allowed simulation of bone remodeling according to Carters adaptation process. Mainly, the bone apposition processes took place in the central part of the periodontal defect, in proximity of the alveolar ridge. However, FEM application in the analysis of bone tissue regeneration within bone defects enables precise evaluation of the achieved changes, therefore allows determination of orthodontic forces positively influencing periodontium in vivo.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 527-532
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of sand columns in the reinforcement of weak layers in road engineering
    Autorzy:
    Ayyad, Sami Mohammed
    Ahmad, Omar Asad
    Powiązania:
    https://bibliotekanauki.pl/articles/1853672.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    kolumna piaskowa
    odkształcenie względne
    odbudowa
    budownictwo drogowe
    wzmocnienie
    warstwa słaba
    sand column
    relative deformation
    rebuilding
    road engineering
    reinforcement
    weak layer
    Opis:
    It is an established fact that when roads are planned and constructed, consideration needs to be given to ensuring the strength of the road surface. It is, however, also the case that when an existing road is being rebuilt or is under maintenance, its base may need to be fortified to increase the road’s vehicle-carrying capacity. The base may, for example, contain a high proportion of weak soil that would be difficult, time-consuming, and costly to remove. This paper aims to investigate the efficacy of using sand-filled piles to reduce road deformation. Experiments conducted on sponge samples confirm that there is a relationship between the total area of sand-filled piles and relative reduction in deformation. It finds that the relationship is non-linear, but that the relationship can be made linear by adjusting the area of sand-filled piles. When the area of sand-filled piles increases from 7.8% to 19.4%, the deformation module can change by up to 100%. Relative reduction in deformation can change from 14% to 45.5% when the area of sand-filled piles increases from 7.8% to 11.7%. The maximum reduction in deformation - 92.4% - occurs when the area of sand-filled piles exceeds 19.5%. Changing the loads borne also affects the deformation module. This paper found that when there was a 10 to 15kg load, and the number of sandfilled piles was increased, there was a change in the deformation module by 380-470%. When there was only a 5kg load on the sample, and the number of sand-filled piles was increased, there was a change in the deformation module by up to 1217%.
    Źródło:
    Archives of Civil Engineering; 2021, 67, 1; 527-538
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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