Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Covid-19 pandemic" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-3 z 3
    Tytuł:
    Assessment of the Labour Market During the COVID-19 Pandemic
    Autorzy:
    Borucka, Anna
    Chapska, Marta
    Żaboklicka, Ewa
    Parczewski, Rafał
    Powiązania:
    https://bibliotekanauki.pl/articles/2197899.pdf
    Data publikacji:
    2023-03-31
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    labour market
    COVID-19 pandemic
    deaths
    unemployment
    Polska
    Opis:
    The COVID-19 pandemic has prompted governments to take radical measures to contain the virus and protect their citizens. These included successive restrictions on social distance, which have led to closing many enterprises in various industries and dismissing their employees. Introducing restrictions has significantly weakened many countries’ economies. Stock markets have noted sharp declines. Therefore, public protection has led to severe consequences for the labour market. Attempts at defining them have been undertaken in the body of literature. However, they focus mainly on analysing selected indicators. According to the authors, it is worth analysing the correlation between the number of deaths as the variable that best reflects the disease’s severity and selected unemployment rates. It was assumed that the number of deaths is a factor significantly distinguishing the periods before and after the pandemic. Therefore, it is possible to assess the correlation between the pandemic and the labour market condition.
    Źródło:
    Polish Political Science Yearbook; 2023, 1(52); 149-164
    0208-7375
    Pojawia się w:
    Polish Political Science Yearbook
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of air traffic in the context of the Covid-19 pandemic
    Autorzy:
    Borucka, Anna
    Parczewski, Rafał
    Kozłowski, Edward
    Świderski, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2176134.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    air traffic
    Covid-19 pandemic
    passenger transport
    ruch lotniczy
    Covid-19 pandemia
    transport pasażerski
    Opis:
    The Covid-19 pandemic unexpectedly shook the entire global economy, causing it to destabilize over a long period of time. One of the sectors that was particularly hit hard was air traffic, and the changes that have taken place in it have been unmatched by any other crisis in history. The purpose of this article was to identify the time series describing the number of airline flights in Poland in the context of the Covid-19 pandemic. The article first presents selected statistics and indicators showing the situation of the global and domestic aviation market during the pandemic. Then, based on the data on the number of flights in Poland, the identification of the time series describing the number of flights by airlines was made. The discrete wavelet transformation (DWT) was used to determine the trend, while for periodicity verification, first statistical tests (Kruskal-Wallis test and Friedman test) and then spectral analysis were used. The confirmation of the existence of weekly seasonality allowed for the identification of the studied series as the sum of the previously determined trend and the seasonal component, as the mean value from the observations on a given day of the week. The proposed model was compared with the 7-order moving average model, as one of the most popular in the literature. As the obtained results showed, the model developed by the authors was better at identifying the studied series than the moving average. The errors were significantly lower, which made the presented solution more effective. This confirmed the validity of using wavelet analysis in the case of irregular behaviour of time series, and also showed that both spectral analysis and statistical tests (Kruskal-Walis and Fridman) proved successful in identifying the seasonal factor in the time series. The method used allowed for a satisfactory identification of the model for empirical data, however, it should be emphasized that the aviation services market is influenced by many variables and the forecasts and scenarios created should be updated and modified on an ongoing basis.
    Źródło:
    Archives of Transport; 2022, 64, 4; 45--57
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected polynomial identification techniques to evaluate maritime transport trends around Covid-19
    Autorzy:
    Borucka, Anna
    Kozłowski, Edward
    Powiązania:
    https://bibliotekanauki.pl/articles/27314651.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    sea transport
    Covid-19 pandemic
    cargo ships
    polynomial function
    transport morski
    pandemia Covid-19
    statki towarowe
    funkcja wielomianowa
    Opis:
    The Covid-19 pandemic has drastically affected the transport sector, because of the restrictions introduced to limit the spread of the threat. They concerned primarily passenger traffic, but trade in goods also faced completely new challenges, related to increased consumption and the dynamic development of e-commerce on the one hand and restrictions related to the pandemic and sealing borders on the other. One of the most susceptible to fluctuations in international trade is the maritime economy, which has been analysed in this article. It was checked how the global threat affected sea traffic in terms of gross weight of goods handled in main ports. The aim of the study was to characterize the impact of the pandemic on sea transport depending on the type of ship and to evaluate the current state of sea transport in the context of the level shaped by forecasts based on observations from before the coronavirus pandemic. The authors' assumption was to check whether the rail transport market has already reached the level it could reach in the absence of the virus threat. The use of a polynomial function was proposed for the study. Time series containing observations up to the outbreak of the pandemic and forecasts based on them, as well as time series containing additional observations from the pandemic period were analysed. The study results obtained allowed to conclude how the global crisis caused by the Covid-19 pandemic affected the cargo traffic in the sea transport, expressed by the mass of goods transshipped in major ports, depending on the individual types of ships.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2023, 120; 51--68
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies