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Wyświetlanie 1-11 z 11
Tytuł:
Design w kontekście zrównoważonego rozwoju i ergonomii – projekty Simo Heikkilä
Simo Heikkilä’s projects in the context of sustainable design and ergonomics
Autorzy:
Wiśnicka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1068301.pdf
Data publikacji:
2020-01-15
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
Simo Heikkilä
design
Finlandia
Opis:
Niniejszy tekst prezentuje wybrane projekty fińskiego designera Simo Heikkilä w kontekście zrównoważonego rozwoju, ekologii i regionalizmu oraz funkcjonalizmu i ergonomii. Wszystkie te kwestie stanowiły podstawę, na której oparta została jego filozofia projektowa. W swoich pracach Heikkilä odwoływał się do szeroko rozumianych idei ekologicznego designu, o czym świadczy wtórne wykorzystanie drewnianych odpadów przemysłowych, gloryfikacja patyny oraz filozofia wielopokoleniowego życia przedmiotów. Korzystając z lokalnie występujących materiałów oraz kultywując rzemieślnicze tradycje Północy wpisuje się również w nurt regionalizmu, który charakterystyczny jest dla designu fińskiego. Poszukiwania Heikkilä na arenie funkcjonalizmu oraz ergonomii, często twórczo połączone z ekologicznymi rozwiązaniami, pokazują potencjał tkwiący w designie skupionym na potrzebach użytkownika. Analizując przykłady projektów oscylujących wokół wyżej wymienionych zagadnień, artykuł prezentuje złożoną stylowo, acz wciąż koherentną, sylwetkę jednego z najbardziej cenionych fińskich projektantów.   
The article aims to focus on Simo Heikkilä’s projects in the context of sustainable design, functionalism and ergonomics – namely the three main fields of global research which determined his artistic activities. At the beginning the text provides a concise historical conditions and basic rules of questions regarding sustainable design, regionalism and ecological design, functionalism and ergonomics to serve as a background for any further deliberations on the matter. The very first question touched upon is sustainable design together with regional and ecologic approach. The strong bonds with nature, in Simo Heikkilä's case, were present in his praise for wood as well as for patina, manifested in various projects. Pieces such as Tupa or wood waste benches present the beauty of raw materials and wood’s endless possibilities. The idea was to design pieces which would recall the utilitarian concept of high quality in a simple form, suitable for mass production, which would serve for generations to come. Following comes the matter of ergonomics. Being a student of Yrjö Kukkapuro, Heikkilä had a chance to see how the principles of ergonomics were put into practice. The simplicity of form, suitable for the office environment, was linked with carefully designed backrests and armrests which provided the user with a comfortable work position. The most vivid example of the search for the ergonomic solution in Heikkilä's works were all the versions of the Divaani chaise longue. It was the quintessence of ergonomic design, as it had derived straight from the shape of the human body, underlining the connotation with an anthropomorphic shape. His experiments with various components resulted in different effects, from very organic ones, which combined natural materials such as wood or rattan with the shape or contrasting the form with such a cold material as steel. Regardless the final effect, the basic concept inspired by the shape of the human body made the project deeply rooted in nature, which was typical of many Heikkilä's projects. Simo Heikkilä's style in terms of furniture design is a very distinctive one, however, it had been influenced by his origins, provenance, education, and both national and world-wide achievements. He intuitively combined local materials and evanescent techniques of local craftsmen, which were part of his earliest art-related memories with innovative ideas introduced by modernism. Hence, in his projects materials such as wood, plywood and steel, often combined with each other for a strong stylistic effect, can be seen. The forms he used were simple, underlining the basic construction ideas, as it can also be considered a part of the design. All of the factors, in combination with Simo Heikkilä's design rules regarding ecology, recycling and regionalism, make his projects unique on the scene of contemporary industrial design.
Źródło:
Artifex Novus; 2018, 2; 102-123
2544-5014
Pojawia się w:
Artifex Novus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fatigue properties of nodular cast irons alloyed by Si, Mo and Cu
Autorzy:
Vaško, Alan
Krynke, Marek
Powiązania:
https://bibliotekanauki.pl/articles/88535.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
nodular cast iron
SiMo
SiCu
fatigue
żeliwo sferoidalne
zmęczenie
Opis:
In recent years, the research of nodular cast iron has been focused on increasing fatigue resistence. In the paper, two types of alloyed nodular cast irons have been investigated – SiMo-nodular cast iron alloyed by 4% of silicon and 1% of molybdenum and SiCu-nodular cast iron alloyed by 4% of silicon and 1.5% of copper. SiMo-nodular cast iron is suitable for high-temperature applications, for example the exhaust manifolds of the combustion engines. SiCu-nodular cast iron is used in various components of tribotechnical units. These components are often loaded by fatigue. The mechanical and fatigue behaviour of both nodular cast iron types has been studied by means of tensile test, impact bending test, hardness test and fatigue tests. Fatigue tests were realised at low frequency cyclic push-pull loading up to 10 million cycles. The relationship between the amplitude of stress and number of cycles to failure was investigated and the fatigue strength was determined. Mechanical and fatigue properties of both nodular cast iron types are correlated with the microstructure of specimens.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 738-744
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crystallization Process of Silicon Molybdenum Cast Iron
Autorzy:
Stawarz, M.
Powiązania:
https://bibliotekanauki.pl/articles/379482.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
theory of crystallization
metallographic analysis
molybdenum carbide
thermal derivative analysis
SiMo
teoria krystalizacji
analiza metalograficzna
węglik molibdenu
analiza termiczna
analiza derywacyjna
Opis:
The article presents results of studies of silicon – molybdenum cast iron (4.42% Si, 2.59% Mo and 2.48% C wt.-%) crystallization process. Metallographic analysis was carried out using SEM-scanning electron microscopy with the EDS system. In order to determine the phase composition, X-ray diffraction studies were performed. Thermo-Calc, a computer simulation program, was used to simulate the crystallization process. . The obtained data allowed to describe the effect of some elements on the crystallization process. The silicon phase of MnSi could not be identified during metallographic studies. Also, computer simulation of the crystallization process did not answer the question at which point the silicon phase of MnSi crystallizes in the tested alloy. Therefore, not all results obtained were linked to the registered crystallization process (TDA process). The EDS analysis revealed an unusual distribution of molybdenum in the microstructure of the sample, where it is clearly visible that the area enriched with this element is also the separation of spheroidal graphite. The possibility of occurrence of Mo-rich micro-areas found in graphite is considered. The case is debatable and difficult to resolve at this stage. Perhaps, at such a high concentration of molybdenum (2.59% Mo) in the alloy, conditions are created for simultaneously crystallization of graphite and molybdenum phases.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 100-104
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical Properties of Silicon Cast Iron
Autorzy:
Stawarz, M.
Kajzer, W.
Kajzer, A.
Dojka, M.
Powiązania:
https://bibliotekanauki.pl/articles/381384.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pitting corrosion
alloy cast iron
SiMo
silicon cast iron
obróbka cieplna
korozja wżerowa
żeliwo stopowe
żeliwo silikonowe
Zaproponuj zmianę
Opis:
The article presents results of pitting corrosion studies of selected silicon cast irons. The range of studies included low, medium and high silicon cast iron. The amount of alloying addition (Si) in examined cast irons was between 5 to 25 %. Experimental melts of silicon cast irons [1-3] were conducted in Department of Foundry of Silesian University of Technology in Gliwice and pitting corrosion resistance tests were performed in Faculty of Biomedical Engineering in Department of Biomaterials and Medical Devices Engineering of Silesian University of Technology in Zabrze. In tests of corrosion resistance the potentiostat VoltaLab PGP201 was used. Results obtained in those research complement the knowledge about the corrosion resistance of iron alloys with carbon containing Si alloying addition above 17 % [4-6]. Obtained results were supplemented with metallographic examinations using scanning electron microscopy. The analysis of chemical composition for cast irons using Leco spectrometer was done and the content of alloying element (silicon) was also determined using the gravimetric method in the laboratory of the Institute of Welding in Gliwice. The compounds of microstructure was identify by X-ray diffraction.
Źródło:
Archives of Foundry Engineering; 2017, 17, 2; 101-106
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SiMo Ductile Iron Crystallization Process
Autorzy:
Stawarz, M.
Powiązania:
https://bibliotekanauki.pl/articles/380670.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
krystalizacja
żeliwo sferoidalne
SiMo
TDA
crystallization process
silicon cast iron
Opis:
The article presents crystallization process of silicon molybdenum ductile cast iron (SiMo). The alloy with 5% silicon content and with variable amounts of Mo in a range of 0-1% was chosen for the research. The carbon content in the analysed alloys did not exceed 3,1%. The studies of crystallization process were based on thermal – derivative analysis (TDA). Chemical composition of all examined samples was analysed with the use of LECO spectrometer. Additionally, the carbon and the sulphur content was determined basing on carbon and sulphur LECO analyser. For metallographic examination the scanning electron microscopy (SEM) with EDS analyser was used. Disclosed phases have been also tested with the use of X-ray diffraction. The results allowed the description of crystallization processes of silicon molybdenum ductile cast iron using thermal – derivative analysis (TDA). Conducted studies did not allow for the clear identification of all complex phases containing molybdenum, occurring at the grain boundaries. Therefore, the further stages of the research could include the use of a transmission electron microscope to specify the description of complex compounds present in the alloy.
Źródło:
Archives of Foundry Engineering; 2017, 17, 1; 147-152
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biała Śmierć : najskuteczniejszy snajper w historii wojen - Simo Häyhä
Autorzy:
Sarjanen, Petri.
Współwytwórcy:
Kojro, Bożena. Tłumaczenie
Data publikacji:
2009
Wydawca:
Zakrzewo : Replika
Tematy:
Häyhä, Simo (1905-2002) biografia
Wojna zimowa (1939-1940)
Strzelcy wyborowi
Opis:
Tyt. oryg.: "Valkoinen kuolema : talvisodan legendaarisen tarkka-ampujan Simo Häyhän tarina".
Bibliogr. s. 275-277.
Dostawca treści:
Bibliografia CBW
Książka
Tytuł:
Biały snajper : Simo Häyhä
White sniper Simo Häyhä
Autorzy:
Saarelainen, Tapio A. M. (1905-2002).
Współwytwórcy:
Kędzierski, Sławomir. Tłumaczenie
Wydawnictwo Vesper Włodzimierz Wieczorek. Wydawca
Data publikacji:
2018
Wydawca:
Czerwonak : Vesper
Tematy:
Häyhä, Simo (1905-2002)
Strzelcy wyborowi
Wojna zimowa (1939-1940)
Biografia
Opis:
Tytuł oryginału: The white sniper Simo Häyhä.
Na okładce: Najskuteczniejszy snajper w historii.
Bibliografia na stronach 235-[237].
Dostawca treści:
Bibliografia CBW
Książka
Tytuł:
Biała śmierć Armii Czerwonej : wojna zimowa 1939-1940
Autorzy:
Rybczyński, Antoni.
Powiązania:
Gazeta Polska 2020, nr 1, s. 56-58
Data publikacji:
2020
Tematy:
Kuusinen, Otto Wille (1881-1964)
Häyhä, Simo (1905-2002)
Mannerheim, Carl Gustaf Emil (1867-1951)
Stalin, Józef (1878-1953)
Oficerowie (wojsko)
Politycy
Wojna zimowa (1939-1940)
Wojsko
Artykuł z czasopisma społeczno-politycznego
Artykuł z tygodnika opinii
Opis:
Artykuł omawia początki wojny sowiecko-fińskiej. 30 listopada 1939 roku zmasowany ostrzał artyleryjski i bombardowanie fińskich miast przez wojska sowieckie zapoczątkowały wojnę zimową. Finowie, m.in. dzięki przystosowaniu do warunków zimowych, zadawali sowietom ogromne straty. Wojna trwała do 12 marca 1940 roku. Finlandia zdołała obronić swoją niezależność.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
The Effect of High Silicon and Molybdenum Content on the Mechanical Properties and Microstructure of Gray Cast Iron
Autorzy:
Dyrlaga, Łukasz
Kopyciński, Dariusz
Guzik, Edward
Soból, Grzegorz
Borak, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/2172379.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
SiMo cast iron
structure
mechanical properties
chemical composition
gray iron
Opis:
This paper presents an overview of the current knowledge concerning SiMo ductile cast iron begins by describing the standard type of ductile cast iron before proceding to description of its microstructures. The paper then presents its chemical composition and the significant influence of individual elements on technological and mechanical properties. The research section focuses the influence of the addition of Si and Mo to the matrix of gray iron. After casting, stepped samples were carried out on the microstructure along with UTS tensile strength tests. The research presented in the article is a preliminary step towards the goal of obtaining a stable production process for silico-molybdenum cast iron.
Źródło:
Journal of Casting & Materials Engineering; 2022, 6, 3; 64--68
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heat Treatment of the SiMo Iron Castings - Case Study in the Automotive Foundry
Autorzy:
Cygan, B.
Stawarz, M.
Jezierski, J.
Powiązania:
https://bibliotekanauki.pl/articles/379738.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat treatment
solidification process
SiMo cast iron
exhaust manifold
automotive parts
obróbka termiczna
proces krzepnięcia
żeliwo SiMo
kolektor wydechowy
części samochodowe
Opis:
Silicon – molybdenum cast iron commonly called SiMo due to its unique properties has becoming more and more interesting engineering material. The history and development of this alloy is relatively long but, due to the significant difficulties during the manufacturing process resulting in the lower final quality than expected, it has not been applied to often in practice. The biggest challenge is its brittleness as a result of the carbides precipitations. During last few years, thanks to the many important researches made and the general foundry technology development, the interest in SiMo iron has been rapidly growing, especially for the castings for heavy duty applications like corrosion, high temperature and wear abrasion resistant parts. In the article the heat treatment attempts to improve the microstructure of SiMo castings has been presented. The goal was to destroy or at least to refine and uniformly distribute the carbides precipitations to improve mechanical properties of the exhaust manifold castings for the cars. The experiments were carried out for the alloy contains approx. 4% Si, 1% Mo and 3.2%C. The range of the research included: hardness measuring, standard mechanical properties and microstructure for as-cast state and after that the subsequent heat treatment process with another properties check. The result of the heat treatment was the elimination of pearlite from the metal matrix. Moreover, the changes of the carbide molybdenum – rich phase morphology were observed. The dispersion of the carbides precipitations in the carbides area was observed. The experiments proved the possibility to control the microstructure and the mechanical properties of the SiMo castings by means of heat treatment but only to some extent.
Źródło:
Archives of Foundry Engineering; 2018, 18, 4; 103-109
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using of Golden Code Orthogonal Super-Symbol in Media-Based Modulation for Single-Input Multiple-Output Schemes
Autorzy:
Bamisaye, Ayodeji James
Quazi, Tahmid
Powiązania:
https://bibliotekanauki.pl/articles/2142306.pdf
Data publikacji:
2022
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
golden code
media-based modulation
radio RF mirrors
SIMO
Opis:
The media-based modulation (MBM) scheme is capable of providing high throughput, increasing spectrum efficiency, and enhancing bit error rate (BER) performance of communication systems. In this paper, an MBM employing radio frequency (RF) mirrors and golden code is investigated in a single-input multiple-output (GC-SIMO) application. The aim is to reduce complexity of the system, maximize linear relationships between RF mirrors and improve spectral efficiency of MBM to in order to obtain a high data rate with the use of less hardware. Orthogonal pairs of the super-symbol in the GC scheme’s encoder are employed, transmitted via different RF mirrors at different time slots in order to achieve the full data rate and high diversity. In the results having BER of 10−5 , the GC-SIMO, MBM exhibits better performance than GD-SIMO, with the gain of approximately 7 dB and 6.5 dB SNR for 4 b/s/Hz and 6 b/s/Hz, respectively. The derived theoretical average error probability of the proposed scheme is validated with the use of the Monte Carlo simulation.
Źródło:
Journal of Telecommunications and Information Technology; 2022, 2; 43--48
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-11 z 11

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