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    Tytuł:
    Compressive Crush Performance of Square Tubes Filled with Spheres of Closed-Cell Aluminum Foams
    Autorzy:
    Uzun, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/351799.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    spheres of closed-cell aluminium foam
    foam-filled tubes
    compression behavior
    energy absorption
    Opis:
    This paper describes the compressive crush behaviour of spheres of closed-cell aluminium foams with different diameters (6, 8 and 10 mm) and square tubes filled with these spheres. The spheres of closed-cell aluminium foams are net spherical shape fabricated via powder metallurgy methods by heating foamable precursor materials in a mould. The square tubes were filled by pouring the spheres of closed-cell aluminium foams freely (without any bonding). The compressive crush performance of square tubes filled with spheres of closed-cell aluminum foams were compared to that of the empty tubes. The results show a significant influence of the spheres of closed-cell aluminium foam on the average crushing load of the square tubes. The energy absorption in the square tube filled with spheres of closed-cell aluminium foam with diameters of 10 mm is higher than in the other square tubes. The spheres of closed-cell aluminium foams led to improvement of the energy absorption capacity of empty tubes.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1755-1760
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ismail al Jazari machines and new technologies
    Autorzy:
    Uzun, A.
    Vatansever, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/386241.pdf
    Data publikacji:
    2008
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    Ismail al Jazari
    nowe technologie
    new technologies
    Opis:
    Al-Jazari was a 12th Century Turkish Scientist, Engineer and writer. His full name was Badi Al-Zaman AbulI-Izz Ibn Ismail Ibn Al-Razzaz Al-Jazari. He lived in Diyarbakir region in Turkey (1206 AD). As his town name is Cizre, the modern Turkish scripting of Jizra , his last name is known as Jazari (Uzun, 1997). Badi Al Zaman means “prodigy of the Age” and was applied to other well-known men (Hill, 1974). He served the Artuks a Seljuks dynasty in Diyarbakir, as a chief engineer – as did his father before him. He invented the crankshaft and some of the first mechanical clocks, driven by water and weights- used water power. He authored and drawed 60 inventions in his book "Al-Jami Bain Al-Ilm Wal-Amal Al-Nafi Fi Sinat'at Al-Hiyal" (The Book of Know-ledge of Ingenious Mechanical Devices). Kitab al-Hiyal is an interesting work on automatic control mechanism, fountains, devices, pipes, valves and siphons. The importance and originality of Kitab al-Hiyal is due to its being an earlier example of the automatic control studies in the history. There are a number of manuscripts of Jazari’s work in Oxford, Leiden, Paris, Dublin and Ýstanbul. Equally cranks may have first been documented by Al Jazari – 300 years before western engineers achieved this (Francesco di Giorgio Martini and Leonardo Da Vinci). He used some kind of symbols for understanding of his drawings like using of electronic circuits. We found that his machine drawings and manufacturings quite qualified understanding (http://orionrobots.co.uk/tiki-index.php?page=Al+Jazari). The aim of this study is to review and examine Al Jazari’s drawings and then, to compare and examine with the new technology period.
    Źródło:
    Acta Mechanica et Automatica; 2008, 2, 3; 91-94
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Production of Melt-Spun Al-20Si-5Fe Alloy and Boron Carbide (B4C) Composite Material
    Autorzy:
    Kilicaslan, M. F.
    Uzun, A.
    Karakose, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/353146.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metal matrix composite
    rapid solidification
    Al-Si alloys
    Opis:
    In this study, metal matrix composite materials containing melt-spun Al-20Si-5Fe alloys and boron carbide was produced by high energy ball milling and then hot pressing at 200 MPa pressure and 450°C. Mechanical and microstructural characterizations were performed by using an optical microscopy, X-Ray diffractometer, and dynamic microhardness tester. It was observed that boron carbide particles were homogenously distributed in the microstructure and values of microhardness and elastic modules were averagely 830 MPa and 42 GPa, respectively.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 2; 597-600
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Leaf and fruit characteristics and genetic diversity of wild fruit cerasus prostratagenotypes collected from the Central Anatolia, Turkey
    Autorzy:
    Uzun, A.
    Yaman, M.
    Pinar, H.
    Gok, B.D.
    Gazel, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/13077288.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2021, 20, 2; 53-62
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphologıcal characteristics of different wild Berberis sphaerocarpa Kar. et Kir. genotypes grown in Jeti-Oguz District (Issyk-Kul Province) of North Eastern Kyrgyzstan
    Autorzy:
    Yilmaz, K.U.
    Abdullaev, A.
    Uzun, A.
    Turgunbaev, K.
    Pinar, H.
    Sulaimanova, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543537.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Today, several fruit species are used for different purposes in alternative medicine. Among those species, barberry species are commonly used in treatment of various diseases. Jeti-Oguz District of Issyk Kul located around Issyk Lake in North-east of Kyrgyzstan has a unique flora and wild Berberis sphaerocarpa Kar. et Kit. (spherical-fruited barberry) species have a great place in regional flora. The fruits, leaves and roots of these species are commonly used by local people as functional products in alternative medicine. The most significant parameter in this wild population is the morphological variation in fruits and leaves. In this study, pomological analyses were performed on ripened black fruits of 26 wild genotypes. Pomological analyses yielded the fruit weights as between 0.23 g (01-JO-006) and 0.61 g (01-JO-025); total soluble solids as between 16.67% (01-JO-014) and 18.73% (01-JO-010 and 01-JO-018). Fruit shapes of genotypes were identified as long, long-spherical, spherical and oblate spherical. Significant variations were observed in morphological characteristics of spherical-fruited barberry genotypes through pomological analyses and field observations.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2017, 16, 2; 123-132
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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