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    Wyświetlanie 1-8 z 8
    Tytuł:
    Analysis and Improvement of an Industrial Process of Hot Die Forging of an Elongated Forging Tipped with a Joggle with the Use of Numerical Simulation Results
    Autorzy:
    Hawryluk, Marek
    Rychlik, Marcin
    Polak, Sławomir
    Zwierzchowski, Maciej
    Dudkiewicz, Łukasz
    Marzec, Jan
    Jabłoński, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/2201924.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    closed die forging
    numerical modelling
    yoke type forging
    quality of forging
    microstructure of forging
    Opis:
    The article performs an analysis of a hot die forging process of producing an elongated forging ended with a joggle in a double system realized on a crank press Masey 1300 t, in open dies, in 3 operations. The thermomechanical model of the forging process considering the changes in the grain size and the forging material recrystallization was elaborated with the use of the calculation packet Qform 7. In the first place, an in-depth analysis of the currently realized forging technology was made, with a special consideration of the temperature changes in the tools as well as in the formed forging. Next, numerical modelling of the process was carried out, as a result of which the following were obtained: correct filling of the tool impressions by the deformed material, the temperature distributions for the forging and the tools, the plastic deformation distributions (considering the thermally activated phenomena), the changes in the grain size and the forging force courses. The results obtained from FEM enable a thorough analysis of the forging process, including: the effect of the deformation time and temperature on the grain size in the forging material, which was confirmed by the microstructure examination results.
    Źródło:
    Advances in Science and Technology. Research Journal; 2023, 17, 2; 192--205
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessing the effect of new data sources on the consumer price index: a deterministic approach to uncertainty and sensitivity
    Autorzy:
    Białek, Jacek
    Panek, Tomasz
    Zwierzchowski, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/2107061.pdf
    Data publikacji:
    2022-09-14
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    price indices
    scraped data
    scanner data
    robustness analysis
    inflation
    Opis:
    One of the greatest challenges facing official statistics in the 21st century is the use of alternative sources of data about prices (scanned and scraped data) in the analysis of price dynamics, which also involves selecting the appropriate formula of the price index at the elementary group (5-digit) level. When consumer price indices of goods and services are constructed, a number of subjective decisions are made at different stages, e.g. regarding the choice of data sources and types of indices used for the purpose of estimation. All of these decisions can affect the bias of consumer price indices, i.e. the extent to which they contribute to the overall uncertainty about the resulting index values. By measuring how robust consumer price indices are, one can assess the impact that the decisions made at the different stages of index construction have on the index values. This assessment involves analysing uncertainty and sensitivity. The purpose of the study described in the article was to determine how much and in which direction the consumer price index changes when including scanner and scraped data in the analysis, in addition to the data on prices collected by enumerators. The impact of these new data sources was assessed by analysing uncertainty and sensitivity under the deterministic approach. To the best of the authors' knowledge, it is a novel application of robustness analysis to measure inflation using new data sources. The empirical study was based on data for February and March 2021, while scanner and scraped data about selected categories of food products were obtained from one retail chain operating hundreds of points of sale in Poland and selling products online. It was found that the choice of a data source has the most significant impact on the final value of the index at the elementary group level, while the choice of the aggregation formula used to consolidate different data sources is of secondary importance.
    Źródło:
    Statistics in Transition new series; 2022, 23, 3; 1-25
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Has Economic Growth in Balkan Countries Been Pro-Poor in the 2012–2017 period?
    Autorzy:
    Zwierzchowski, Jan
    Panek, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2076902.pdf
    Data publikacji:
    2022-05-20
    Wydawca:
    Uniwersytet Warszawski. Wydział Nauk Ekonomicznych
    Tematy:
    economic growth
    poverty
    inequality
    Opis:
    The study investigates whether economic growth in the Balkan countries was pro-poor in the most recent period. We also try to establish to what extent various measures of pro-poorness of economic growth produce consistent and comparable results. Firstly, concepts of pro-poor growth are defined and corresponding approaches toward measuring pro-poor growth are presented. We distinguish between measures based on a general class of pro-poor indices and a dominance-based techniques. In the empirical part of the study, we verified whether economic growth in six Balkan countries (Greece, Bulgaria, Romania, Slovenia, Croatia and Serbia) was pro-poor in the 2012–2017 period. The analyses is based on the latest available panel data of the European Union Survey on Income and Living Conditions (EU-SILC). Growth was pro-poor in Croatia, Romania and Slovenia during the whole analysed period. The growth pattern was non pro-poor in Bulgaria, Greece and Serbia in certain years, mainly during periods of economic downfall. Various measures of pro-poor growth patterns do not produce consistent results in all instances. The results of the conducted comparative analysis suggest that the level of social benefits does not directly influence the pro-poor nature of the economic growth.
    Źródło:
    Central European Economic Journal; 2022, 9, 56; 76-92
    2543-6821
    Pojawia się w:
    Central European Economic Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement of Subjective Well-being under Capability Approach in Poland
    Autorzy:
    Zwierzchowski, Jan
    Panek, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1790395.pdf
    Data publikacji:
    2020-06-24
    Wydawca:
    Polskie Towarzystwo Socjologiczne
    Tematy:
    SEM
    subjective well-being
    MIMIC
    capabilities approach
    Opis:
    As a part of the European Statistical System, a general concept of measuring the quality of life was presented, defining its dimensions and partial indicators. The methodological objective of the study is to operationalize the measurement of subjective well-being(SW-B). The proposed method of measuring SW-B is based on the above concept, while incorporating the Sen’s capabilities approach. The operationalization was performed using the MIMIC model. This model incorporates both observable functionings (SW-B indicators) and sociodemographic characteristics of individuals (conversion factors). The two sets of variables are linked through the latent capabilities, which are interpreted as the SW-B measures. Empirical analysis of the SW-B in Poland in 2015 was conducted using EU-SILC data. Characteristics influencing the SW-B were identified. The SW-B depends mostly on self-perceived health and material deprivation. Moreover, higher values of SW-B were observed for those who work, have 1–2 children and are highly educated.
    Źródło:
    Polish Sociological Review; 2020, 210, 2; 157-178
    1231-1413
    2657-4276
    Pojawia się w:
    Polish Sociological Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    We are more alike than you think. Age distribution of the quality of life among persons with and without disabilities
    Autorzy:
    Antczak, Radosław
    Grabowska, Izabela
    Zwierzchowski, Jan
    Panek, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1827559.pdf
    Data publikacji:
    2020-12-30
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    quality of life
    persons with disabilities
    age
    survey data
    Opis:
    Purpose: In this article we apply the age perspective to assess the quality of life (QoL) of persons with disabilities. Using a single measurement tool, we compare age profiles in the quality of life of persons with disabilities to the population without disabilities. By doing so, we examine whether the general patterns (such as U-shaped profile) are observed also among the population with disabilities, hence assessing how heterogenous this group is. Methods: We have constructed a multidimensional measurement model identifying overall and nine dimensions of the quality of life using structural equation modelling. The model conceptually is based on the Eurostat guidelines. All analyses are based on EU-SILC survey data, carried out in Poland in 2015. Results: The quality of life for both groups has inverse, right-skewed U-shape. The maximum value is achieved for the age group of 30–34 and after this threshold a constant decline is observed. The QoL scores for the population with disabilities are obviously significantly lower. Additionally, they are more heterogenous, and with greater variation between men and women. In a majority of the domains we also observe lower scores for persons with disabilities. However, people with disabilities are similarly diversified by age as persons without disabilities. Conclusion: Our study suggests that people with disabilities are similarly diversified by age as persons without disabilities. Therefore, disability means something different for younger and older persons and this difference is reflected in their quality of life. It means that public policy for persons with disabilities should also be diversified, avoiding ‘one-for-all’ policy.
    Źródło:
    Studia Demograficzne; 2020, 178, 2; 75-105
    0039-3134
    Pojawia się w:
    Studia Demograficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spektakl gościnności. „Party przy świecach” Antoniego Krauzego
    Spectacle of Hospitality: “The Candlelight Party” by Antoni Krauze
    Autorzy:
    Ossowska-Zwierzchowska, Aldona
    Zwierzchowski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/31341193.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Sztuki PAN
    Tematy:
    Antoni Krauze
    Jan Himilsbach
    PRL
    Polish People’s Republic
    Opis:
    Party przy świecach (1980) Antoniego Krauzego, zrealizowane na podstawie opowiadania Jana Himilsbacha, jest opowieścią o wynikających z aspiracji naśladownictwie i chęci wyróżnienia się, stanowiąc zarazem krytyczne nawiązanie do socjalistycznego konsumeryzmu epoki Gierkowskiej. Bohaterowie chcą zaakcentować swój status przez zorganizowanie przyjęcia, w znacznej mierze odwołując się do imitacji obyczajów i postaw. Niezależnie od tego tytułowe party nie przestaje przecież być czymś wyjątkowym, pozwalającym wykroczyć poza codzienność. Tworzenie identyfikacji społecznej przez przygotowanie przyjęcia, sposób zachowania, dobór potraw i alkoholi jest czymś uniwersalnym, a zarówno aspiracje bohaterów, jak i obyczaje biesiadne nie są związane jedynie z kulturą PRL. Właśnie ten kontekst ma w filmie fundamentalne znaczenie. Party przy świecach, jak również inne przywoływane przez autorów filmy z lat 70., stanowią zatem także fascynujący opis obyczajów, zarówno ówczesnej codzienności, jak i świętowania.
    The Candlelight Party (1980) by Antoni Krauze, based on a story by Jan Himilsbach, is a story about the imitation and the desire to stand out resulting from aspirations, constituting at the same time a critical reference to the socialist consumerism of the era of Edward Gierek The protagonists want to accentuate their status by organizing the party, to a large extent referring to the imitation of customs and attitudes. Regardless, the title party does not cease to be something special, allowing you to go beyond everyday life. The creation of social identification through the preparation of the party, the manner of behaviour, the selection of dishes and alcohol is something universal, and both the aspirations of the heroes and feasting customs are not associated only with the culture of the Polish People’s Republic. This context has a fundamental meaning in the film. The Candlelight Party, as well as other films from the 70s cited by the authors, are also a fascinating description of customs of everyday life and celebration.
    Źródło:
    Kwartalnik Filmowy; 2017, 100; 193-204
    0452-9502
    2719-2725
    Pojawia się w:
    Kwartalnik Filmowy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ powszechnych systemów emerytalnych na płodność
    How Pension Systems Influence Fertility
    Autorzy:
    Zwierzchowski, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/575483.pdf
    Data publikacji:
    2009-04-30
    Wydawca:
    Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
    Tematy:
    pension system
    fertility
    overlapping generations model (OLG)
    welfare state
    Opis:
    The paper aims to show the way in which pension systems affect fertility rates. The author outlines the history of pension systems and traces changes in fertility. The article includes a brief overview of demographic theories and tells the reader why these approaches are inadequate in explaining fertility trends. In his analysis, Zwierzchowski makes use of the overlapping generations model (OLG) to show why and under what circumstances pensions may discourage people from having children. After further theoretical research, the author concludes that the negative influence of pension systems on fertility could be neutralized by the introduction of a public assistance program targeted at parents. The costs of such a program could be covered by those who do not have children, Zwierzchowski says. While today’s welfare state systems cover some of the costs of bringing up children, it is unclear to what extent this assistance neutralizes the negative impact of pension systems on fertility, Zwierzchowski notes.
    Źródło:
    Gospodarka Narodowa. The Polish Journal of Economics; 2009, 231, 4; 75-89
    2300-5238
    Pojawia się w:
    Gospodarka Narodowa. The Polish Journal of Economics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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