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    Wyświetlanie 1-8 z 8
    Tytuł:
    Modelling and Validation of the Composite Shell of a Train Seat
    Autorzy:
    Gołębiowski, Łukasz
    Siwek, Marcin
    Ciesielski, Marcin
    Zagórski, Andrzej
    Krauze, Sławomir
    Majewski, Radosław
    Powiązania:
    https://bibliotekanauki.pl/articles/2091281.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Kolejnictwa
    Tematy:
    train seat structure
    FRP composite
    FEM modelling
    experimental validation
    konstrukcja fotela kolejowego
    kompozyt FRP
    test wytrzymałościowy
    modelowanie MES
    walidacja doświadczalna
    Opis:
    The subject of the modelling work and the conducted experiments is the composite shell of a train seat. The activities carried out involved designing the geometry, planning the material structure, and selecting the materials to be used. The shell was built using polymer matrix fibrous composites (i.e. FRP – Fibre Reinforced Polymer – composites), which are lighter than steel and comply with the relevant standards for strength and safety at the same time. This was followed by creating a computational model for the shell and conducting a strength analysis in accordance with the guidelines of the relevant industry standard and strength hypotheses adopted for FRP composites. The calculations were conducted using ANSYS Composite PrepPost software based on the finite element method. The article offers a strength analysis of an optimised composite shell of a train seat. Based on the guidelines obtained as a result of the conducted modelling work, a physical prototype (validation model) of the seat was created. Hot vacuum lamination technology was applied in the production process. Th e experimental validation of the model, producing a positive result, was conducted using a test stand owned by S.Z.T.K. TAPS – Maciej Kowalski.
    Źródło:
    Problemy Kolejnictwa; 2020, 189; 75--84
    0552-2145
    2544-9451
    Pojawia się w:
    Problemy Kolejnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling and Validation of the Composite Shell of a Train Seat
    Autorzy:
    Gołębiowski, Łukasz
    Siwek, Marcin
    Ciesielski, Marcin
    Zagórski, Andrzej
    Krauze, Sławomir
    Majewski, Radosław
    Powiązania:
    https://bibliotekanauki.pl/articles/2091274.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Kolejnictwa
    Tematy:
    train seat structure
    FRP composite
    FEM modelling
    experimental validation
    konstrukcja fotela kolejowego
    kompozyt FRP
    test wytrzymałościowy
    modelowanie MES
    walidacja doświadczalna
    Opis:
    The subject of the modelling work and the conducted experiments is the composite shell of a train seat. The activities carried out involved designing the geometry, planning the material structure, and selecting the materials to be used. The shell was built using polymer matrix fibrous composites (i.e. FRP – Fibre Reinforced Polymer – composites), which are lighter than steel and comply with the relevant standards for strength and safety at the same time. This was followed by creating a computational model for the shell and conducting a strength analysis in accordance with the guidelines of the relevant industry standard and strength hypotheses adopted for FRP composites. The calculations were conducted using ANSYS Composite PrepPost software based on the finite element method. The article offers a strength analysis of an optimised composite shell of a train seat. Based on the guidelines obtained as a result of the conducted modelling work, a physical prototype (validation model) of the seat was created. Hot vacuum lamination technology was applied in the production process. The experimental validation of the model, producing a positive result, was conducted using a test stand owned by S.Z.T.K. TAPS – Maciej Kowalski.
    Źródło:
    Problemy Kolejnictwa; 2020, 189; 75--84
    0552-2145
    2544-9451
    Pojawia się w:
    Problemy Kolejnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Economic Imagination and Support For Parliamentary Democracy In Poland
    Autorzy:
    Koźmiński, Andrzej K.
    Zagórski, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/417439.pdf
    Data publikacji:
    2014-06-15
    Wydawca:
    Akademia Leona Koźmińskiego w Warszawie
    Tematy:
    economic imagination
    free market
    democracy
    liberalism
    interventionism
    attitudes
    Opis:
    Purpose: The article introduces a concept of the economic imagination, describes economic public attitudes and discusses the character of the contemporary economic imagination of Poles. Methodology: Representative survey conducted on the stratifi ed random sample of 1022 adult respondents by means of CAPI (computer assisted personal interview). Statistical analysis of data. Findings: The features perceived by public as economically benefi cial to the entire economy, particular enterprises and individuals have been ranked by the representative survey and statistically grouped into more general clusters. Those considered as good for the economy are grouped into such factors as “investment and competition”, “statism (etatism)” and “progressive taxation”. The features considered as benefi cial for the enterprises are grouped into “human, social and economic capital”, “law obedience and good social relations” and “limited free market”. Personal characteristics perceived as benefi cial for individual’s economic success are grouped into “honesty, perseverance and good social relations”, “skills and diligence” and “nepotism and instrumentalism”. Intensity as well as determinants of such general value loaded convictions, and their impact on acceptance of democracy have been revealed as well. The implications: Economic imagination has to be analysed as an important factor of socio-economic system’s legitimization. Originality: Distinction and empirical defi nition of economic attitudinal syndromes at three different levels: macro-economic, enterprise and individual constitute a novelty in socio-economic research. Discussion of their determinants and wider implications constitute a new contribution to the theory of social legitimization.
    Źródło:
    Management and Business Administration. Central Europe; 2014, 22, 2; 3-30
    2084-3356
    Pojawia się w:
    Management and Business Administration. Central Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Balanced Development Index: Its Construction and Application in Times of Uncertainty, Poland 1999–2017
    Autorzy:
    Koźmiński, Andrzej
    Noga, Adam
    Piotrowska, Katarzyna
    Zagórski, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/1790881.pdf
    Data publikacji:
    2016-09-25
    Wydawca:
    Polskie Towarzystwo Socjologiczne
    Tematy:
    socio-economic development
    balanced development
    flourishing
    social indicators
    economic indicators
    composite indexes
    forecasts
    Opis:
    This paper presents interdisciplinary research on the transformation of Polish society and the economy. A new composite Balanced Development Index (BDI) has been constructed and applied in a ‚beyond GDP’ paradigm to analyse Poland’s socio-economic development during the 1999-2014 period and to make predictions for 2015-2017. Four groups of detailed indicators-two economic ones (external and internal) and two social ones (concerning the objective and subjective current situation, and public expectations for the future)- are used to construct four middle-level indexes, which are subsequently aggregated into the general BDI index. The congruency between the four middle-level indexes is interpreted in terms of the balance relevant for future socio-economic development. The validity of the index is proven by its high correlation with the psychological conditions of society. The results indicate a less optimistic picture of development in Poland than is provided by the GDP, which has been constantly growing.
    Źródło:
    Polish Sociological Review; 2016, 195, 3; 267-290
    1231-1413
    2657-4276
    Pojawia się w:
    Polish Sociological Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Virus-like particles of potato leafroll virus as potential carrier system for nucleic acids.
    Autorzy:
    Sułuja, Elżbieta
    Strokowskaja, Ludmiła
    Zagórski-Ostoja, Włodzimierz
    Pałucha, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1041380.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    encapsidation
    Virus-like particles
    Opis:
    Potato leafroll virus is a member of the polerovirus genus. The isometric virion is formed by a coat protein encapsidating single-stranded, positive-sense, mono-partite genomic RNA with covalently attached viral protein at the 5' end. The coat protein of the virus exists in two forms: i) a 23 kDa protein, the product of the coat protein gene, and ii) a 78 kDa protein, the product of the coat protein gene and an additional open reading frame expressed by read-through of the coat protein gene stop codon. The aim of this work was the expression of potato leafroll virus coat protein-based proteins that would be able to assemble into virus-like particles in insect cells. These modified particles were tested for their ability to encapsidate nucleic acids. Two types of N-terminally His-tagged coat protein constructs were used for the expression in insect cells: one, encoding a 23 kDa protein with the C-terminal amino-acid sequence corresponding to the wild type coat protein and the second with additional clathrin binding domain at the C-terminus. The expression of these two proteins by a recombinant baculovirus was characterized by Western immunoblotting with antibodies directed against potato leafroll virus. The protection or putative encapsidation of nucleic acids by these two coat protein derivatives was shown by DNase I and RNase A protection assays.
    Źródło:
    Acta Biochimica Polonica; 2005, 52, 3; 699-702
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in the extent and geometry of the Scott Glacier, Spitsbergen
    Autorzy:
    Zagórski, Piotr
    Siwek, Krzysztof
    Gluza, Andrzej
    Bartoszewski, Stefan A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2051708.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Spitsbergen
    Scott Glacier
    glacier geometry
    surface ablation
    GIS analysis
    Źródło:
    Polish Polar Research; 2008, 29, 2; 163-185
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elements regulating Potato leafroll virus sgRNA1 translation are located within the coding sequences of the coat protein and read-through domain
    Autorzy:
    Łoniewska-Lwowska, Adrianna
    Chełstowska, Sylwia
    Zagórski-Ostoja, Włodzimierz
    Pałucha, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1040473.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    polerovirus
    subgenomic RNA
    in vitro translation
    Opis:
    Translation of viral proteins from subgenomic RNAs (sgRNAs) is a common strategy among positive-stranded RNA viruses. Unlike host mRNA, sgRNA of Potato leafroll virus (PLRV) does not possess a cap at its 5' end nor a poly(A) tail at the 3' terminus, both of which are known to be crucial for translation of RNA in eukaryotic cells. Here, we demonstrate, that in wheat germ extract (WGE) truncation of the sgRNA1 5' UTR increases translation efficiency, as it has previously been observed in rabbit reticulocyte lysate (RRL), whereas removal of the 3' UTR does not affect translation. We also describe two regulatory elements located within the coding sequence of the coat protein (CP) gene and its read-through domain (RTD) and are responsible for regulation of in vitro translation of the PLRV sgRNA1. The first element is composed of the purine sequence AAAGGAAA located between the AUG codons of the CP and 17K genes. Deletion of this domain or its substitution by pyrimidines reduced by half the translation of both genes, whereas deletion of the RTD resulted in a 3.6-fold reduction in translation efficiency. This is the first report of translation regulatory elements of plant viruses located within a coding region.
    Źródło:
    Acta Biochimica Polonica; 2009, 56, 4; 619-625
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nucleotide sequence of RNA of a Polish isolate of potato leafroll luteovirus
    Autorzy:
    Pałucha, Andrzej
    Sadowy, Ewa
    Kujawa, Alicja
    Juszczuk, Marek
    Zagórski, Włodzimierz
    Hulanicka, Danuta
    Powiązania:
    https://bibliotekanauki.pl/articles/1045304.pdf
    Data publikacji:
    1994
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Źródło:
    Acta Biochimica Polonica; 1994, 41, 4; 405-414
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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