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    Wyświetlanie 1-5 z 5
    Tytuł:
    Water Quality Assessment of the Surface Water of the Southern Bug River Basin by Complex Indices
    Autorzy:
    Shakhman, Iryna
    Bystriantseva, Anastasiia
    Powiązania:
    https://bibliotekanauki.pl/articles/1839300.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    Southern Bug River
    water quality
    surface water
    pollutant
    complex indices
    hydrochemical parameters
    Opis:
    The article describes modern anthropogenic load on the surface water of the Southern Bug River Basin in a changing climate. The main water users-pollutants of the Southern Bug River Basin in Vinnytska and Mykolaivska regions were identified. The water quality of the surface water of the Southern Bug River in time and space (along the river stream) was analyzed. The water quality of the Southern Bug River was assessed by complex indices for different water users. In order to assess water quality, it is recommended to use complex indices that take into account the effect of the total action of pollutants. The self-purification potential and capability of restoration in space (along the river stream) of the aquatic ecosystem of the Southern Bug River was established for 2019. The results of the study allow us to state that the use of surface water of the Southern Bug River Basin for drinking, fishery, cultural and recreational needs is related to certain environmental risks. It is recommended to carry out the environmental protection measures aimed at adjusting the priorities of economic activity, reduction of wastewater discharge and increase in the water content of the river by regulating the operation of energy complexes.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 1; 195-205
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Coherence and Comparability as Criteria of Quality Assessment in Business Statistics
    Autorzy:
    Młodak, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/466016.pdf
    Data publikacji:
    2013
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    coherence
    comparability
    mirror statistics
    benchmarking
    data precision
    complex indices
    Opis:
    The problems of coherence and comparability exceed the classical notion of analysis of survey errors, because they do not concern single surveys or variables but the question of how results of two or more surveys can be used together and how relevant data can effectively be compared to obtain a better picture of social and economic phenomena over various aspects, e.g. space or time. This paper discusses characteristics of the main concepts of coherence and comparability as well as a description of differences and similarities between these two notions. Types of coherence and various aspects of perception of these notions in business statistics are analysed. Main sources of lack of coherence and comparability, factors affecting them (e.g. methodology, time, region, etc.) and methods of their measurement in context of information obtained from businesses will be also presented.
    Źródło:
    Statistics in Transition new series; 2013, 14, 2; 287-318
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Results for complex postoperative patients’s rehabilitation combined with acupuncture by clinical and laboratory indices
    Autorzy:
    Shevela, T. L.
    Pohodenko-Chudakova, I. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/284099.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    rehabilitation
    acupuncture
    dental implementation
    Źródło:
    Engineering of Biomaterials; 2009, 12, no. 89-91; 12-13
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ konkurencji na przyrost grubości drzew w wyżynnych lasach mieszanych o złożonej budowie
    Effect of competition on the diameter growth of trees in mixed upland forests with complex structure
    Autorzy:
    Śmigielski, A.
    Socha, J.
    Maciejewski, Z.
    Pach, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989022.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Roztoczanski Park Narodowy
    drzewostany naturalne
    drzewostany mieszane
    drzewa lesne
    grab
    buk
    jodla
    przyrost drzew
    przyrost grubosci
    wskazniki konkurencyjnosci
    competition indices
    natural stands
    roztocze national park
    Opis:
    The aim of this study was to assess the effect of competition on diameter growth of European beech (Fagus sylvatica L.), silver fir (Abies alba Mill.) and European hornbeam (Carpinus betulus L.) in forests with complex structure. For each tree we calculated set of 20 competition indexes in 4 variants for determining the scale of the competitors influence. The use of such a set of indices, allowed to describe accurately the competition between trees in the specific conditions for the particular tree species. Given species belong to the group of shade−tolerant trees. The species composition of the tree stands and their structure are the results of long−lasting natural processes, which is different than in the majority of Polish forests. The empirical material collected in the years 1993 and 2003 in four sample plots of 0.5 ha each located in natural stands of the Roztocze National Park in south−eastern Poland. The relationships between the competition and the growth were analysed using generalized additive models. This method allows to extend of the standard linear model, by taking into account non−linear function of each variable. One of the option of quantifying competition processes is the use of competition indices. The competition situation of an individual tree was described using distance−independ and distance−depend indices. Each of analysed species reacts differently on competition. Among the three analyzed species, the best competition index CI15 explained 48.3% of the variation diameter growth of European beech (tab. 2). The competition index CI3 explained only 26.1% of the variation diameter growth of European hornbeam (tab. 2). It turned out to be the worst result for the described species. The competition index CI14 explained 31.1% of the variation diameter growth of silver fir (tab. 2). Additional use of DBH in the models, increased values of the coefficient of determination, and extended the possibilities to use the developed models.
    Źródło:
    Sylwan; 2017, 161, 05; 365-378
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rola poszczególnych gatunków drzew w kształtowaniu złożonej budowy pionowej w starodrzewach liściastych Puszczy Niepołomickiej
    Role of tree species in the formation of a complex vertical structure of deciduous old-growth forests in the Niepolomice Forest
    Autorzy:
    Bartkowicz, L.
    Kołodziej, Z.
    Pach, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989716.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    starodrzew
    struktura drzewostanu
    struktura wysokosci
    drzewa lesne
    gatunki lasotworcze
    Puszcza Niepolomicka
    oak−hornbeam forest
    riparian forests
    structural diversity indices
    ecological mechanisms
    Opis:
    The objective of the study was to compare the seven tree species in terms of their role in the formation of a complex vertical structure in mixed broadleaved stands. The data came from 18 multi−storey old−growth forests representing different communities of lowland deciduous forests in the Niepołomice Forest. In each stand, squared sample plot (80×80 m) was established. The height of trees of dbh≥7 cm was measured. Then, for each studied species, values of the two structural indices were determined. The structural diversity index (ZS) quantifies tree height variation within individual population, whereas the index of structure−forming role (RS) expresses the contribution of the given population into vertical structural diversity of the whole stand. The greatest tendency to form a population with a large height diversity belonged to Tilia cordata, Fraxinus excelsior and Ulmus laevis. Significant opportunities in this regard, however, were exhibited by other tree species, including shade−intolerant Pinus sylvestris and Alnus glutinosa. This phenomenon in the conditions of eutrophic habitats, with the constantly present competitive pressure from shade−tolerant species, should be considered as an exceptional. A major contribution to vertical structural diversity of the stand was often an attribute of the populations with a low internal height diversity, which concerned especially Quercus robur. This means that an important ecological mechanism responsible for the formation of a multi−layer canopy is complementary filling the space above ground by trees of the species with different light requirements. However, the lack of correlation between RS and ZS indices suggests that the ability of particular species to form the population with a high internal diversity is equally important. The results prove the possibility of forming stands with a very complex vertical structure in the conditions of lowland mixed deciduous forests. However, in terms of sustainable maintenance of such stand structure, the issue of the growth rate of trees at different competitive pressure and the nature of their response to the release at different stages of ontogeny remains open.
    Źródło:
    Sylwan; 2015, 159, 08; 650-657
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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