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    Wyświetlanie 1-7 z 7
    Tytuł:
    Prośrodowiskowe zasady organizacji konferencji
    Pro-environmental rules of conference organization
    Autorzy:
    Kostecka, J.
    Pączka, G.
    Piękoś, P
    Powiązania:
    https://bibliotekanauki.pl/articles/297160.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    edukacja dla zrównoważonego rozwoju
    organizacja konferencji
    kwestionariusz wywiadu
    education for sustainable development
    organization of conferences
    questionnaire
    Opis:
    Celem podjętej pracy było sprawdzenie, na przykładzie działania kilku firm organizujących konferencje o tematyce prośrodowiskowej, czy przygotowywane przez nie spotkania są organizowane w sposób ograniczający antropopresje. Wyniki wywiadów wskazują na konieczność prowadzenia pilnych działań uczulających na podejmowanie prośrodowiskowych decyzji organizacyjnych.
    The aim of this work was to verify, at the example of several companies which organize conferences on pro-environment issueS, if meetings prepared by them are organized in a way that minimizes human pressure on the environment. The results of the interviews point to the need to take urgent actions which are to teach how to make pro-environmental organizational decisions.
    Źródło:
    Inżynieria i Ochrona Środowiska; 2013, 16, 4; 499-510
    1505-3695
    2391-7253
    Pojawia się w:
    Inżynieria i Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of batch structure on cluster computing performance – complex systems approach
    Autorzy:
    Dymora, P.
    Mazurek, M.
    Strzałka, D.
    Piękos, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/106315.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Tematy:
    cluster computing
    optimization
    system performance
    Opis:
    This work presents the problem of clusters computing performance optimization. An assessment of the impact of computing architecture, applications, and communications equipment on the system performance was done. Processing bottlenecks were identified, showing that in order to obtain an optimum usage of computational structure the system should be treated as a complex one in which it is impossible to isolate and optimize each element independently.
    Źródło:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2012, 12, 1; 57-66
    1732-1360
    2083-3628
    Pojawia się w:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of Ti and Fe on the Microstructure and Properties of Copper and Copper Alloys
    Autorzy:
    Piękoś, M.
    Garbacz-Klempka, A.
    Kozana, J.
    Żak, P. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1840892.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    copper alloys
    thermodynamic modelling
    alloying additions
    titanium
    mechanical properties
    microstructure
    stopy miedzi
    modelowanie termodynamiczne
    dodatki stopowe
    tytan
    właściwości mechaniczne
    mikrostruktura
    Opis:
    The paper discusses issues related to the technology of melting and processing of copper alloys. An assessment was made of the impact of titanium and iron introduced in the form of pre-alloy - Ti73Fe master alloy on the microstructure and selected properties of pure copper and copper-silicon alloy. There are known examples of the use of titanium and iron additive to the copper alloy. Titanium as an additive introduced to copper alloys to improve their properties is sometimes also applicable. In the first stage of the study, a series of experimental castings were conducted with variable content of Ti73Fe master alloy entering copper in quantities of 5 %, 15 %, 25 % in relation to the mass of the metal charge. In the second stage, a silicon additive was introduced into copper in the amount of about 4 % by weight and 0.5 % and 1 % respectively of the initial Ti73Fe alloy. Thermodynamic phase parameters were modelled using CALPHAD method and Thermo-Calc software, thus obtaining the crystallization characteristics of the test alloys and the percentage of structural components at ambient temperature. Experiments confirmed the validity of the use of Ti73Fe master alloy as an additive. The pre-alloy used showed a favourable performance, both in terms of addition solubility and in the area of improvement of strength properties. Changes were achieved in the microstructure, mainly within the grain, but also in the developed dendrites of the solid solution. Changes occur with the introduction of titanium with iron into copper as well as to two-component silicon bronze.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 4; 83-90
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the Microstructure, Properties and Machinability of Al-Cu-Si Alloys
    Autorzy:
    Kozana, J.
    Piękoś, M.
    Maj, M.
    Garbacz-Klempka, A.
    Żak, P. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1840820.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    casting of non-ferrous metals
    aluminum alloys
    ternary Al-Cu-Si alloy
    mechanical properties
    microstructure
    thermo-calc
    odlewanie metali nieżelaznych
    stopy aluminium
    stop trójskładnikowy Al-Cu-Si
    właściwości mechaniczne
    mikrostruktura
    Opis:
    As part of the studies conducted in the field of broadly understood casting of non-ferrous metals, selected results on the impact of variable additions of copper and silicon in aluminium were presented. A series of melts was carried out with copper content kept constant at a level of 2% (1st stage) and 4% (2nd stage) and variable contents of silicon introduced into aluminium. The crystallization characteristics of the examined alloys and the percentage of structural constituents at ambient temperature were obtained by modelling the thermodynamic parameters of individual phases with the CALPHAD method. The microstructure of the obtained alloys was examined and microhardness was measured by the Vickers-Hanemann method. The alloy properties were assessed based on the results of mechanical tests, including ultimate tensile strength (UTS), hardness (BHN) and elongation (E). The machinability of the tested alloys was analyzed in a machinability test carried out by the Keep-Bauer method, which consisted in drilling with a constant feed force. The obtained results clearly indicate changes in the images of microstructure, such as the reduction in grain size, solution hardening and precipitation hardening. The changes in the microstructure are also reflected in the results of mechanical properties testing, causing an increase in strength and hardness, and plasticity variations in the range of 4 ÷ 16%, mainly due to the introduced additions of copper and silicon. The process of alloy strengthening is also visible in the results of machinability tests. The plotted curves showing the depth of the hole as a function of time and the images of chips produced during the test indicate an improvement in the wear resistance obtained for the tested group of aluminium alloys with the additions of copper and silicon.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 4; 145-153
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Modification in Centrifugal Casting on Microstructure and Mechanical Properties of Silicon Bronzes
    Autorzy:
    Garbacz-Klempka, A.
    Kozana, J.
    Piękoś, M.
    Papaj, P.
    Perek-Nowak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/379593.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative foundry materials
    CuSi alloys
    centrifugal casting
    microstructure
    mechanical properties
    innowacyjne technologie odlewnicze
    innowacyjne materiały odlewnicze
    stop Cu-Si
    odlewanie odśrodkowe
    mikrostruktura
    właściwości mechaniczne
    Opis:
    Silicon bronzes are characterised by good mechanical properties and by high corrosion and mechanical wear resistance. The process of sleeve casting by means of the centrifugal casting with the horizontal axis of the mould rotation was analysed. The assessment of the influence of modification and centrifugal casting parameters on the microstructure and mechanical properties of alloys was carried out in the hereby work. Zirconium was applied as a modifier. Speed of rotation of the mould was the variable parameter of the centrifugal casting. The investigation results were summarised on the basis of the microstructure analysis and mechanical properties determination: UTS, proof stress, A10 and BHN. The experiment aimed at finding the information in which way the modification together with changing the pouring parameters influence the mechanical properties of the CuSi3Zn3FeMn alloy.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 3; 11-18
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ceramic Moulds for Precision Casting in the Bronze Age and Computer Reconstruction of the Casts
    Autorzy:
    Garbacz-Klempka, A.
    Kozana, J.
    Piekoś, M.
    Kwak, Z.
    Długosz, P.
    Stolarczyk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382197.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    non-destructive testing
    archaeometallurgy
    casting mould
    lost wax molding
    reconstruction
    XRF
    computer visualization
    badania nieniszczące
    formy odlewnicze
    metoda traconego wosku
    wizualizacja komputerowa
    Opis:
    The casting workshop in Grzybiany, in Lower Silesia (SW Poland) is a valuable source of knowledge on the development of casting techniques in the 7 – 6 centuries BC. Abundant evidence found on the archaeological site points to cast manufacturing by means of precision casting in ceramic moulds (lost-wax molding). The workshop is the biggest collection of moulds for bracelet, necklace and other smaller decorative artefacts in Poland. The aim of the work is to conduct the research of the moulds and casts with the view of performing a computer reconstruction of the casting moulds from the Bronze and Early Iron Age, based on the Grzybiany finds. As part of the work, both the microscopic structure and defectoscopic analyses of the casting moulds were performed. Chemical composition of the casts was tested using the X-ray fluorescence spectroscopy method. Based on these results and using computer modelling methods, a geometric visualisation was performed, which is the bases for preparing the visualisation of the process of pouring liquid metal into the moulds, reconstructing both the technology and the alloys used.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1 spec.; 21-26
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of a Castings Quality and Metalworking Technology. Treasure of the Bronze Age Axes
    Autorzy:
    Garbacz-Klempka, A.
    Kaczmarek, Ł.
    Kwak, Z.
    Kozana, J.
    Piękoś, M.
    Perek-Nowak, M.
    Długosz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/382751.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    non-destructive testing
    archeometallurgy
    tin bronze
    X-ray spectroscopy
    castings defects
    badania nieniszczące
    archeometalurgia
    brąz
    spektroskopia rentgenowska
    wady odlewów
    Opis:
    Cast axes are one of the most numerous categories of bronze products from earlier phases of the Bronze Age found in Poland. They had multiple applications since they were not only used objects such as tools or weapons but also played the prestigious and cult roles. Investigations of the selected axes from the bronze products treasure of the Bronze Age, found in the territory of Poland, are presented in the hereby paper. The holder of these findings is the State Archaeological Museum in Warsaw. Metallurgical investigations of axes with bushing were performed in respect of the casting technology and quality of obtained castings. Macroscopic observations allowed to document the remains of the gating system and to assess the range and kind of casting defects. Light microscopy revealed the microstructure character of these relicts. The chemical composition was determined by means of the X-ray fluorescence method with energy dispersion (ED-XRF) and by the scanning electron microscopy with X-ray energy dispersion analysis in micro-areas (SEM-EDS). The shape and dimensions of cores, reproducing inner parts of axes were identified on the basis of the X-ray tomography images. Studies reconstructed production technology of the mould with gating system, determined chemical composition of the applied alloys and casting structures as well as revealed the casting defects being the result of construction and usage of moulds and cores.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 3; 179-285
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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