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Wyświetlanie 1-2 z 2
Tytuł:
THE VARIABILITY OF TURKEY LIVESTOCK PRICE AND ITS RELATION WITH THE PRICE OF CHICKENS, PORK AND BEEF IN 2006-2015
Autorzy:
Utnik-Banaś, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/452933.pdf
Data publikacji:
2017
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
turkeys
price
variability
time series
seasonality
cyclic fluctuations
Opis:
The work determines the range of variability in the price of turkey livestock and its relation to prices of chickens, pork and beef in 2006-2015. In 2006-2011, the variability coefficient for turkey livestock was 5 to 10%, whereas in 2012-2015 it dropped below 5%. The prices were most stable out of prices of chickens, pork or beef. The biggest influence on the variability of the turkey livestock price was the long-term trend and cyclic fluctuations (82% of the total variability on average). Seasonal fluctuations had lower amplitude (between 7 and 4%) than in the case of prices of pork and chickens, and their input in the total variability amounted to 14% on average. The price of turkey livestock presented the strongest correlation with the price of beef (r=0,851) and chickens (0,837), and was the least correlated with pork (0,681). In 2006-2015 the price of turkey livestock increased by 68%, beef by 57%, chickens by 29% and pork by 13%.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2017, 18, 1; 134-142
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trends and fluctuations of river ice regimes in the Prypiat Basin, within Ukraine
Autorzy:
Gorbachova, Liudmyla
Afteniuk, Oleksandr
Khrystiuk, Borys
Lobodzinskyi, Oleksandr
Powiązania:
https://bibliotekanauki.pl/articles/2201937.pdf
Data publikacji:
2023
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
ice phenomena
air temperature
Prypiat River
homogeneity
stationarity
cyclic fluctuations
tendencies
Opis:
Information about the formation, destruction, and duration of river ice regimes is especially important for hydropower, shipping, fisheries, etc. Research into modern trends in river ice regimes and their spatial and temporal fluctuations is essential, especially in a changing climate. This study examines the trends and fluctuations of air temperature and ice regimes based on series of observations in the Prypiat River basin within Ukraine. Air temperature data from 17 meteorological stations and ice data from 29 water gauges were analyzed. A complex analytical approach involving statistical and graphical methods was employed. The Mann-Kendall statistical test, mass curve, residual mass curve, and combined graphs were used in the study. In the Prypiat River basin within Ukraine, observations of mean monthly air temperature, ice occurrence, freeze-up, and their duration are homogeneous (quasi-homogeneous) and stationary (quasi-stationary). The quasi-homogeneous and quasi-stationary characteristics are explained by the presence in the observation series of only increasing and decreasing phases of long-term cyclical fluctuations, which are incomplete. The trends of air temperature and ice regime correspond strongly, indicating the defining role of air temperature in the formation of ice occurrence and freeze-up. Since the end of the 1990s, the warming phase of air temperature in the autumn-winter period determines the appearance of ice and freeze-up later in the year. In March, the warming trend in air temperature, which began after 1988, determines the freezeup, break-up, and disappearance of ice earlier in the year. Thus, the duration of ice and freeze-up on the rivers has decreased.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2023, 11, 1; 1--14
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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