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Wyświetlanie 1-10 z 5475
Tytuł:
Comprehensive analysis of the process of population ageing in Poland in the years 1950–2016
Autorzy:
Roszkowska, Ewa
Tematy:
population ageing
biological age groups
age factor
median age
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Wydawca:
Uniwersytet w Białymstoku. Wydawnictwo Uniwersytetu w Białymstoku
Powiązania:
https://bibliotekanauki.pl/articles/2128103.pdf  Link otwiera się w nowym oknie
Opis:
Aim – The main aim of the study is to determine the dynamics of the ageing process of the Polish population and to present a forecast of population ageing based on comprehensive analysis of the age structure of this population. The separated components of this structure are biological age groups: 0–14, 15–64, 65 years and more. The time period of the research comprises the years 1950–2016, while the population forecast by age is presented for 2020 and 2050. The elaboration includes data from GUS. Research methodology – In assessing the level of the ageing of Polish society there were used, among others, the old age index, old age coefficient, a measure of the similarity of structures, a measure of the structural change intensity, and the median age. Score – In the years 1950–2016 in Poland there were observed changes in the age structure of the population in age groups: 0–14 years old, 15–64 years old, 65 years old and more, including a steady trend in the percentage of people in the age group 0–14 years old and a steady upward trend in the percentage of people aged 65 and over, a strong upward trend in the old age index, and a strong tendency of increase in the post-working age dependency ratio. The Central Statistical Office’s (GUS) forecasts indicate that the population ageing measured by changes in the age structure of the population and the shifting of the median age which are taking place in Poland in a dynamic manner, will continue with increased intensity over the next decades. Originality/value – The added value of the work is the use of the similarity of structures and the intensity of structure changes, which together with an approach based on classical indicators allowed for a comprehensive analysis of the age structure of the Polish population in dynamic terms, determining the quantitative nature of changes in the age structure over time, the direction of these changes and their intensity. It was also pointed out that in light of the ongoing demographic transformations, the concept of silver economy understood as an economic system aimed at using the potential of the elderly and taking into account their needs is becoming a priority.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bone age assessment using cephalometric photographs
Autorzy:
Mituś-Kenig, Maria
Durka-Zając, Magdalena
Marcinkowska, Agata
Opis:
Background: The assessment of bone age comprises the basic element of orthodontic diagnostics as it enables the recognition of deviations from normal growth, determines the choice of treatment, helps determine the appropriate moment to begin treatment, establish prognosis and plan a retention strategy. In order to make an assessment of skeletal maturity possible in a single examination, radiological methods were adopted. The following characteristics are evaluated on a radiograph: the appearance, size and shape of ossification centers, the width and the shape of growth cartilage and the degree of fusion between diaphyses and epiphyses. In order to assess the maturity of bones, hand-wrist radiographs were introduced in the second decade of the 20th century. Bone age assessment of bone age could also be made based on an analysis of a morphological maturity of cervical vertebrae utilizing cephalometric radiographs. Objective: The objective of the study was to evaluate the correspondence between bone age assessments made from hand-wrist radiographs and those from cephalometric radiographs. Material/Methods: In order to fulfill the objectives, hand-wrist radiographs as well as cephalometric radiographs of 30 patients (15 girls and 15 boys) between 10 and 17 years of age were collected. Bone age of hand, wrist and cervical spine was assessed. Bone age on hand-wrist radiographs was evaluated using the Björk method, whereas cephalometric radiographs were analyzed by the Baccetti et al.method. Results: A strong and statistically highly significant (r=0.98; p<0.00001) Pearson's correlation was found between bone age assessed from hand-wrist radiographs using Björk's method and bone age assessed from cephalometric radiographs using the method by Baccetti et al. Conclusions: The analysis of cervical vertebrae in cephalometric radiographs appears to be the most desirable method of bone age assessment. Performing the analysis on routinely taken cephalograms eliminates the need for additional exposure to X-ray radiation and shortens the duration of examination.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Wznowienie badań wykopaliskowych na osadzie z epoki brązu i wczesnej epoki żelaza w Grzybianach w powiecie legnickim
Autorzy:
Baron, Justyna
Stolarczyk, Tomasz
Wydawca:
Instytut Archeologii Uniwersytetu Wrocławskiego
Opis:
The article presents the results of the archaeological investigation of the Late Bronze and Early Iron Age settlement at Grzybiany (site 3). The aim of fieldwork, which was resumed after a break of nearly 30 years, was to refine the data on the stratigraphy of the settlement and secure organic samples for absolute dating.
Dostawca treści:
Repozytorium Centrum Otwartej Nauki
Artykuł
Tytuł:
Analiza geologiczno-morfologiczno-glebowa przeprowadzona na stanowiskach archeologicznych w Grabowcu, gmina Radymno, powiat jarosławski, województwo podkarpackie
A geological-morphological-soil analysis conducted on archaeological sites in Grabowiec, commune Radymno, district Jarosław, the Podkarpackie Voivodeship
Autorzy:
Reder, Jan
Stępniewski, Krzysztof
Tematy:
geomorphology
settlement
Bronze Age
early Iron Age
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Wydawca:
Narodowy Instytut Dziedzictwa
Powiązania:
https://bibliotekanauki.pl/articles/896806.pdf  Link otwiera się w nowym oknie
Opis:
The text includes an analysis and interpretation of the environmental context of prehistoric sites in Grabowiec. Information is given on their location, topography as well as geological characteristics of the area, where human settlements were located. Also the results of analysis of geomorphological situation and soil cover were presented.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 5475

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