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    Wyświetlanie 1-8 z 8
    Tytuł:
    The Effect of Perlite Addition on Erosive Wear Behavior of Alumina Ceramics
    Autorzy:
    Tas, S.
    Ercenk, E.
    Yilmaz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182871.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Je
    81.05.Mh
    46.55.+d
    62.20.F-
    81.20.Ev
    Opis:
    In this study, the effects of perlite addition on mechanical properties and wear resistance of alumina ceramics were investigated. Alumina powders including perlite 5%, 10%, 15%, 20% and perlite free were prepared. These powders were shaped as rectangular by using uniaxial pressing system under the load of 100 MPa. The samples were sintered at 1400°C-1550C for 2 h and were subjected to some mechanical tests such as hardness and fracture toughness. X-ray diffraction analysis was employed to determine the crystalline phases. Bulk densities of the samples were measured. In addition, erosive wear test was performed to investigate the erosive wear resistance of the samples. The wear test results were presented depending on different sliding speed and sintering temperature. These results showed that perlite addition has a positive effect on erosive wear resistance of the alumina ceramics, generally.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 632-634
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using sustainable competitive advantages to measure technological opportunities
    Autorzy:
    Takala, J.
    Muhos, M.
    Tilabi, S.
    Tas, M. S.
    Yan, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/407191.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sense and response methodology
    sustainable competitive advantage
    risk level
    knowledge and technology
    K/T
    Oulu South region
    small and medium-sized enterprise
    SME
    Opis:
    The goal of this paper is to help small and medium size enterprises (SMEs) to find operative competitive advantage. This paper introduces a new method which applies critical factor analysis, risk and opportunities analysis to measure and propose resource allocation for companies in couple of next years. this research shows Knowledge/Technology (K/T) Calculation effect on (Balanced) Critical Factor Index (CFIs) depending on the proportions allocated among the different technological levels (Basic, Core or Spearhead) for each attribute separately. Moreover it helps firms to take balance in resource allocation for each attribute in changing environments on the basis of different level of technology. This paper presents the ’first in the world’ case study on operative sustainable competitive advantage and corresponding risk levels by taking into account technology and knowledge effects for 7 SME companies.
    Źródło:
    Management and Production Engineering Review; 2013, 4, 3; 55-64
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Validating knowledge and technology effects to operative sustainable competitive advantage
    Autorzy:
    Takala, J.
    Koskinen, J.
    Liu, Y.
    Tas, M. S.
    Muhos, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/407066.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sustainable competitive advantage
    SCA
    knowledge
    technology rankings
    manufacturing strategy
    sense and respond
    S&R
    operational excellence
    operations management
    dynamic capabilities
    Opis:
    Purpose: This paper aims to present a fresh idea on how to model and examine the level of sustainable competitive advantage (SCA) with and without knowledge and /technology (K/T) effects in a case company’s operation by taking the manufacturing strategy’s development directions and the efficiency of resource allocation among its attributes into consideration. Design/Methodology/approach: In this paper, questionnaires are filled by two different managerial groups, company’s management team (G1) and company’s global directors (G2). The analyses based on G1, G2 and G1-G2 (mixed results) are performed and examined as well as the effect of knowledge and /technology rankings to observe the differences on how they effect on company’s operations strategy and what kind of strategy type that decision makers might follow. Besides, the effects of knowledge/technology rankings on SCA risk levels are examined on different case companies to perceive the similarities and differences with our case company. In this case study, the objectives are achieved based on several methodologies: manufacturing strategy index (MSI) [1] and sense and respond (S&R) methodology [2]. Findings: The achieved results through the model are found to be promising corresponding to the feedback from the respondents. Research limitations/implications: The model is applied only in a big sized B2B global company that produces power electronics products. Therefore, further tests need to be applied to the model in case of multiple companies from different sizes and areas to figure out the best formula in case of validation of strategic direction (MAPE, RSME or MAD). Practical implications: As a result of its wide applicability and its ease in arrangement the model has an enormous potential for strategic decision-making process and strategic analysis. Originality/Value:The model can provide a more dependable possibility of sustainable improvement to the corporate operational excellence and strategy.
    Źródło:
    Management and Production Engineering Review; 2013, 4, 3; 45-54
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Multiple Cation (Al, Si, Ti, Co) Doping on Electrochemical Performance οf $LiMn_2O_4$ Cathode Active Material
    Autorzy:
    Kılıç Dokan, F.
    Şahan, H.
    Veziroğlu, S.
    Akkuş Taş, N.
    Aydın, A.
    Patat, Ş.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399894.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    88.80.ff
    Opis:
    In order to improve the cycling performance of $LiMn_2O_4$, the spinel phases base and multiple cation doped $LiMn_{1.95}Al_{0.0125}Si_{0.0125}Ti_{0.0125}Co_{0.0125}O_4$, $LiMn_{1.9}Al_{0.025}Si_{0.025}Ti_{0.025}Co_{0.025}O_4$ spinels were synthesized by the glycine-nitrate combustion process. The structures of the products were investigated by X-ray diffraction, scanning electron microscopy and electrochemical tests.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 365-367
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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