Temat: multidimensional statistical analysis

Skocz do pozycji: 1.

Tytuł:: Disparities assessment in the development of selected elements of technical infrastructure of the districts in mazowieckie voivodeship
Ocena dysproporcji w rozwoju wybranych elementów infrastruktury technicznej powiatów województwa mazowieckiego
Autorzy:: Pietrych, Ł.
Tematy:: districts
sewage infrastructure
multidimensional statistical analysis; Pokaż więcej
Wydawca:: Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Powiązania:: https://bibliotekanauki.pl/articles/2052021.pdf Link otwiera się w nowym oknie
Opis:: Subject and purpose of work: The subject of the work was the issue related to development of technical infrastructure. The aim of the work was to identify the differences in the scope of development of the selected elements of technical infrastructure at the level of poviats of the Masovian voivodeship. Materials and methods: To create the ranking of poviats multi-dimensional statistical methods were used. Three research methods were used, that is: Czekanowski’s diagram, Hellwig’s measurement and k-mean method. Data which served for the analysis were obtained from Local Database for the year 2012. Results: It was noted that within the Masovian voivodeship areas characterized with higher level of infrastructure development occur, which are above all the poviats located in the central part of the voivodeship, mainly around the largest cities of the voivodeship. Areas with weak infrastructural investments are above all poviats located in the southern area of the region, typically agricultural ones. Conclusions: Basic conclusion which stems from the work indicates that availability of drainage infrastructure is not sufficient in all the poviats of the Masovian voivodeship. It was noted that a justification of this state of affairs is the specificity of their location.
Przedmiot i cel pracy: Przedmiotem pracy były zagadnienia związane z rozwojem infrastruktury technicznej. Za cel przyjęto natomiast identyfikację różnic w zakresie rozwoju wybranych elementów infrastruktury technicznej na poziomie powiatów województwa mazowieckiego. Materiały i metody: Do budowy rankingu powiatów zastosowano wielowymiarowe metody statystyczne. Wykorzystano trzy metody badawcze, tj.: diagram Czekanowskiego, miara Hellwiga oraz metoda k – średnich. Dane, które posłużyły do analizy pochodziły z Banku Danych Lokalnych za rok 2012. Wyniki: Stwierdzono, że w województwie mazowieckim występują obszary cechujące się wyższym poziomem rozwoju infrastruktury, są to przede wszystkim powiaty położone w centralnej części województwa, głównie wokół największych miast województwa. Obszary o słabym zainwestowaniu infrastrukturalnym to przede wszystkim powiaty zlokalizowane w południowej części regionu, typowo rolnicze. Wnioski: Podstawowy wniosek płynący z pracy wskazuje, że dostępność do infrastruktury kanalizacyjnej nie we wszystkich powiatach województwa mazowieckiego jest wystarczająca. Stwierdzono, że uzasadnieniem takiego stanu rzeczy jest specyfika renty ich położenia.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Prakseologiczne podejście do oceny działania systemu emerytalnego
Praxiological Approach to the Assessment of Pension System
Autorzy:: Chybalski, Filip
Tematy:: pension system
praxeology
effectiveness
efficiency
multidimensional statistical analysis; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Filozofii i Socjologii PAN
Powiązania:: https://bibliotekanauki.pl/articles/469154.pdf Link otwiera się w nowym oknie
Opis:: The effectiveness and the efﬁciency of the pension system is a problem that is not frequently mentioned in scientiﬁc writing, especially in its praxeological context. The objective of the article is to present the concept of the praxeological approach to assessment of the pension system. The ﬁrst part of the article presents the objectives of the pension system. In the second part the praxeological approach to the assessment of pension system is discussed. The third part includes the deﬁnition and the multidimensional characteristics of the effectiveness and efﬁciency of the pension system. In the fourth part the concept of the measurement of effectiveness and efﬁciency with the use of multidimensional statistical analysis is proposed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Differences in results of ranking depending on the frequency of the data used in multidemensional comparatine analysis. Example of the stock exchanges in Central-Eastern Europe
Autorzy:: Chrzanowska, Mariola
Tematy:: multidimensional statistical analysis
stock market
synthetic development measure; Pokaż więcej
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Powiązania:: https://bibliotekanauki.pl/articles/453411.pdf Link otwiera się w nowym oknie
Opis:: Advancing globalization provides access to more information. It also affects the frequency of data. Some events are listed on a monthly, daily and even minute basis. Thus, during the time-space study selecting appropriate and relevant information becomes a problem. The paper presents a suggested solution to this problem based on the example of stock exchanges in Central and Eastern Europe.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Early detection of phosphorus deficiency stress in cucumber at the cellular level using chlorophyll fluorescence signals
Autorzy:: Sieczko, Leszek
Dąbrowski, Piotr
Kowalczyk, Katarzyna
Gajc-Wolska, Janina
Borucki, Wojciech
Janaszek-Mańkowska, Monika
Kowalczyk, Waldemar
Farci, Domenica
Kalaji, Hazem M.
Tematy:: abiotic stress
chlorophyll fluorescence
cucumber
JIP test
multidimensional statistical analysis
photosynthesis; Pokaż więcej
Wydawca:: Instytut Technologiczno-Przyrodniczy
Powiązania:: https://bibliotekanauki.pl/articles/2203572.pdf Link otwiera się w nowym oknie
Opis:: Abiotic stressors contribute to growth restriction and developmental disorders in plants. Early detection of the first signs of changes in plant functioning is very important. The objective of this study was to identify chlorophyll fluorescence parameters that change under phosphorus deficiency stress in cucumber. In this work, a trail to study the early changes caused by phosphorus deficiency in cucumber plants by analysing their photosynthetic performance is presented. Chlorophyll-a fluorescence (ChF) parameters were measured every 7 days for a period of 28 days. Measurements were made separately on young and old leaves and on cucumber fruit. Parameters that decreased during the stress were: p2G, PI abs, PI total, REo/CSo, and TRo/CSo. P deficiency decreased total electron carriers per RC (ECo/RC), yields (TRo/ABS (Fv/Fm), ETo/TRo, REo/ETo, ETo/ABS and REo/ABS), fluxes (REo/RC and REo/CSo) and fractional reduction of PSI end electron acceptors, and damaged all photochemical and non-photochemical redox reactions. Principal component analysis revealed a group of ChF parameters that may indicate early phosphorus deficiency in cucumber plants. Our results are used in the discovery of sensitive bioindicators of phosphorus deficiency in cucumber plants. Most JIP test parameters are linked to mathematical equations, so we recommend using of advanced statistical tools, such as principal component analysis, which should be considered very useful for stress identification. It has also been shown to be more effective in multivariate methods compared to univariate statistical methods was demonstrated.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Application of the observational tunnels method to select a set of features sufficient to identify a type of coal
Autorzy:: Jamroz, D.
Niedoba, T.
Tematy:: multidimensional statistical analysis
observational tunnels method
coal
image visualization
energetic materials; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/109317.pdf Link otwiera się w nowym oknie
Opis:: Coal is a material which has many features deciding about its quality. Among them, the decisive ones are mainly ash contents, sulfur contents and combustion heat. The paper presents the investigation of coal characteristics of three selected coal types in the context of their energetic value. For this purpose samples were collected from three different Polish mines: coal types 31, 34.2 and 35 (Polish classification of coals). Each of these materials was separated into particle size fractions (9 fractions) and then into 8 density fractions by separation in heavy liquids. For each size-density fractions obtained in this way, chemical analyses were performed which allowed for determination of such features as combustion heat, sulfur contents, ash contents, volatile parts contents and analytical moisture. Altogether, seven dimensions of grained material characteristics were obtained. The data prepared in this way was subsequently analyzed for correlation with the purpose of determining significant relations between investigated features. It was stated that the most correlated coal features are density, combustion heat, ash contents and volatile parts contents. For multidimensional analysis and identification of coal type, the modern image visualization technique, the Observational Tunnels Method, was applied. After performing seven-dimensional analysis aimed at the proper recognition of coal type, it was decided to determine the minimum amount of random variables, which describe a particular material in order to identify its type. It was stated that the crucial coal identification parameter is “analytical moisture”. Due to existing correlation between individual features, three of them were selected for testing: analytical moisture, sulfur contents and volatile parts contents. On the basis of the obtained images, it was stated that it was possible to obtain a view with the data concerning each type of coal being located in other part of the space. Subsequently, it was checked if a similar result is possible when the parameter “volatile parts contents” is replaced with highly correlated parameters “combustion heat” and “ash contents”. In both cases the exchange of these variables did not produce good enough results. This can be explained by a different scale of empirical data making it impossible to obtain a clear multidimensional image for which all three types of coal would be located in other parts of space. However, it was proved that the modern graphical and computer methods can be successfully applied to identify the types of particulate materials.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The educational and cultural ranking of Lower Silesian cities
Autorzy:: Bartłomowicz, Tomasz
Tematy:: multidimensional statistical analysis
educational and cultural situation of cities
Lower Silesia region; Pokaż więcej
Wydawca:: Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Powiązania:: https://bibliotekanauki.pl/articles/569960.pdf Link otwiera się w nowym oknie
Opis:: The educational and cultural dimension is a multivariate category, characterized by many attributes (e.g. number of students and academic teachers, educational institutions, library readers, library borrowers and visitors to the museums, etc.). This means the possibility of perceiving regions as objects of multidimensional statistical analysis, and ordering them according to a certain criterion. The paper presents the similarities and differences between selected cities of the Lower Silesia region with a population of over 30,000 inhabitants in the educational and cultural scope. For this purpose, a set of diagnostic variables (stimulants and destimulants) was defined. This allowed specifying the most and least differences between the surveyed objects and consequently the order of the cities from the best city to the worst one. Finally, this allowed the creation of the educational and cultural ranking of Lower Silesian cities
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Implementation of the No Poverty Sustainable Development Goal (SDG) in Visegrad Group (V4)
Autorzy:: Bartniczak, Bartosz
Raszkowski, Andrzej
Sobczak, Elżbieta
Wydawca:: MDPI
Cytata wydawnicza:: Sobczak, E., Bartniczak, B., & Raszkowski, A. (2021). Implementation of the No Poverty Sustainable Development Goal (SDG) in Visegrad Group (V4). Sustainability, 13(3), 1–21. http://doi.org/10.3390/su13031030
Opis:: This presented study discusses problems related to the implementation of the Sustainable Development Goal 1: No Poverty, aimed at eliminating poverty, based on the example of the Visegrad Group (V4) countries. The introduction addresses the general characteristics of the V4 and attempts to define the concept of sustainable development, with particular emphasis on its complex nature and importance for future generations. The purpose of the research was to assess the diversity within the Visegrad Group countries in the years 2005–2018 in terms of poverty and sustainable development level in the No Poverty area and also to identify the impact of the socioeconomic development level in the studied countries on sustainable development in the No Poverty area. Taking into account the analysis of poverty indicators in the Visegrad Group countries, the best results were recorded for Czechia. The second part of the conducted analyzed allowed us to conclude that Czechia definitely presents the highest level of sustainable development, followed by Slovakia. The highest average dynamics of changes occur in Poland and Hungary, which result in the gradual elimination of the existing disproportions. Among other research results, it is worth highlighting that the V4 countries show significant, however, decreasing differences regarding the indicators describing poverty in relation to sustainable developmen
Program doskonałości naukowo - badawczej INTEREKON . Kierownik projektu w UEW: Ewa Stańczyk-Hugiet, ewa.stanczyk-hugiet@ue.wroc.pl , data rozpoczęcia 01-01-2019, data zakończenia 31-12-2022
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 8.

Tytuł:: Aging Society and the Selected Aspects of Environmental Threats: Evidence from Poland
Autorzy:: Bartniczak, Bartosz
Raszkowski, Andrzej
Sobczak, Elżbieta
Wydawca:: MDPI
Cytata wydawnicza:: Sobczak, E., Bartniczak, B., & Raszkowski, A. (2020). Aging Society and the Selected Aspects of Environmental Threats: Evidence from Poland. Sustainability, (12), 1–22. http://doi.org/10.3390/su12114648
Opis:: The project is financed by the Ministry of Science and Higher Education in Poland under the program “Regional Initiative of Excellence” 2019–2022 project number 015/RID/2018/19 total funding amount 10 721 040,00 PLN
The article addresses problems of population aging in Poland and the selected environmental hazards exerting a negative impact on seniors’ health. The introduction presents the reasons underlying the above-mentioned aging process and provides the characteristics of the primary environmental threats. The next part covers the most important trends and indicators related to the demographic situation in the country. The core of the study is focused on presenting and interpreting the results of empirical research on the periodization of the population aging process in Poland, in the years 2004–2019, using the multidimensional statistical analysis method including, in particular, the data classification method. The key demographic factors differentiating the development phases of the population aging process include, in order of their significance: longer life expectancy of the population, narrowed gross reproduction rate, declining birth rate, and total migration balance. In addition, the article provides the analysis of the selected environmental threats’ impact on population aging in Poland, among which the following were indicated: high temperatures, solar conditions, heavy rainfall, strong winds, droughts, and fires. Moreover, the process of longer life expectancy in fine health is essentially related to two issues: the level of medical care, with particular attention paid to check-ups and preventive measures, and the promotion of a healthy lifestyle. In summary, it should be highlighted that the elimination of all pollutants or the reasons of environmental hazards is not possible; however, the actions primarily focused on reducing the emission of harmful gases into the atmosphere and other forms of environmental pollution should definitely be taken
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 9.

Tytuł:: Application of Variance Analysis to Compare Characteristics of Various Types of Hard Coal
Zastosowanie analizy wariancji do porównania charakterystyk różnego typu węgli kamiennych
Autorzy:: Niedoba, T.
Surowiak, A.
Pięta, P.
Tematy:: węgiel kamienny
typy węgla
wielowymiarowa analiza statystyczna
analiza wariancji
klasy ziarnowe
hard coal
coal types
multidimensional statistical analysis
variance analysis
particle fractions; Pokaż więcej
Wydawca:: Polskie Towarzystwo Przeróbki Kopalin
Powiązania:: https://bibliotekanauki.pl/articles/319167.pdf Link otwiera się w nowym oknie
Opis:: In Polish nomenclature many types and subtypes of coal can be found which differ between themselves by individual characteristics. However, it is often that is no easy to recognize them properly on the basis on, for example, chosen numerical data describing their features. In the paper, the variance analysis was used as the tool of comparing analysis for three chosen types of coal which were collected from three various hard coal mines located in Upper Silesia. There were coals of type 31, 34.2 and 35. Each of coals was first screened and then additionally divided into density fractions by means of zinc chloride aqueous solution. Such prepared material was then investigated because of several chosen features, like combustion heat, ash contents, sulfur contents, volatile parts contents and moisture. Together with mass it gave seven–dimensional vector describing each of chosen fractions for all three types of coals. Then, the full variance analysis was conducted with investigation of all assumptions required to its conduction. The results served to elaborate conclusions.
W polskiej nomenklaturze istnieje wiele typów i podtypów węgla, które różnią się między sobą różnymi cechami. Jednakże, często nie jest łatwo rozpoznać je na podstawie, na przykład, wybranej zmiennej numerycznej opisującej ich cechy. W artykule zastosowano analizę wariancji jako narzędzia porównawczego dla trzech typów węgli kamiennych, które zostały pobrane z trzech kopalni zlokalizowanych na Górnym Śląsku. Były to węgle typów 31, 34.2 oraz 35. Każdy z węgli został najpierw przesiany a następnie dodatkowo rozdzielony na frakcje gęstościowe przy użyciu wodnego roztworu chlorku cynku. Tak przygotowany materiał został następnie zbadany ze względu na kilka wybranych cech, takich jak ciepło spalania, zawartość popiołu, zawartość siarki, zawartość części lotnych oraz wilgotność. Wraz z masą dało to siedmiowymiarowy wektor opisujący każdą z wybranych frakcji dla wszystkich trzech typów węgli. Następnie, przeprowadzono pełną analizę wariancji z badaniem wszystkich założeń wymaganych do jej przeprowadzenia. Wyniki posłużyły do opracowania wniosków.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Ocena przydatności wybranych metod WAP w analizie samodzielności finansowej gmin
Usefulness of the selected MSA methods in the analysis of local government unit’s financial independence
Autorzy:: Jaworska, Monika
Kożuch, Artur Jacek
Tematy:: samodzielność finansowa gminy
miara syntetyczna
wielowymiarowa analiza porównawcza
Polska wschodnia
financial independence
synthetic measure
multidimensional statistical analysis,
eastern Poland; Pokaż więcej
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Powiązania:: https://bibliotekanauki.pl/articles/453722.pdf Link otwiera się w nowym oknie
Opis:: W badaniu zastosowania metod wielowymiarowej analizy porównawczej w ocenie samodzielności gmin miejsko-wiejskich w Polsce wschodniej dokonano oceny dwóch wybranych metod, tj. metody miary rozwoju Helwiga i bezwzorcowej metody agregacji zmiennych. Dobór metod wynika z założenia, że dają one możliwość wyrażenia licznego zbioru wskaźników charakteryzującyh poziom samodzielności finansowej za pomocą jednej zmiennej zagregowanej, co umożliwia uporządkowanie analizowanych obiektów. W opracowaniu pojęto próbę ustalenia, czy stosowane metody badania samodzielności finansowej różnicują wartości uzyskanych wyników oraz, czy istnieje uzasadnienie dla wyboru jednej z nich, jako zabezpieczającej wysoką jakość rozważań o badanym zjawisku.
The purpose of this paper is to estimate level of local government unit’s financial independence in eastern Poland. For this purpose it was used multidimensional statistical analysis allowing to describe complex effect with help of one variable, so called value of synthetic variable (Hellwig’s method, additive aggregation function).
Dostawca treści:: Biblioteka Nauki

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