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The Divorce Rate in the Pandemic Year of 2020 in Czechia
Fidranský, Tomáš ; Slabá, Jitka (advisor) ; Kalibová, Květa (referee)
The Divorce rate in the pandemic year of 2020 in Czechia Abstract: The year 2020 was unprecedented in terms of changes in the functioning of both individuals and institutions. This thesis aims to evaluate the impact of anti-epidemic measures implemented to reduce the spread of the Covid-19 pandemic on the divorce rate. It mainly focuses on changes in intensity and structure of divorce rate during the periods of the state of emergency when courts could have been limited in their ability to function properly. Analysis of data from the Czech Statistical Office pointed to a decrease in the total divorce rate in the spring of 2020, at a time of the first pandemic wave. A similar and temporary drop in the divorce rate was already observed in Czechia at the end of the 1990s. The cause behind that decrease was a change in legislature, which made it more difficult for marriages with underage children to get a divorce. Therefore, the decrease in divorce rate intensity occurred only in the group of marriages with underage children. Compared to that, the decrease in 2020 happened almost identically between marriages with underage children present and marriages without underage children present. This divorce rate drop, seen in the spring of 2020, was not sufficiently compensated by the increased divorce rate in the...
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Seasonality in reproduction and abundance of birds in African savannas
Kučminová, Veronika ; Hořák, David (advisor) ; Remeš, Vladimír (referee)
Seasonality of climate is a crucial factor that determines the existence of African savannas. Especially, the rainfall seasonality is a key factor in the abundance and reproduction of bird species of the savannas. Precipitation determines the timing of reproduction directly, but mainly indirectly through the influence of the environment, phenology, and productivity of plants. The vegetation determines the availability of resources and shelters. However, the widespread distribution of the savannas across the continent means that the seasonality and consequently the environment varies considerably from one area to another due to the different timing, size, and duration of wet and dry seasons. Breeding, as well as the abundance of savanna birds, is clearly influenced by the availability of food, which is determined by seasonal rainfall. For most species, the rainy season is an ideal time for reproduction, but there are also other groups of birds, that prefer a dry season for breeding and nesting. The birds must cope with unfavourable conditions outside the breeding season or leave their breeding areas. The abundance of birds in savannas is also significantly affected by the presence of palearctic migrants. Migration is therefore an important factor of the seasonal abundance of the savanna avifauna....
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Seasonal profile of nuptiality, natality and mortality in the Czech republic and international comparison
Jiroušová, Martina ; Rychtaříková, Jitka (advisor) ; Bartoňová, Dagmar (referee)
Seasonal profile of nuptiality, natality and mortality in the Czech republic and international comparison Abstract The aim of this thesis is to capture changes in seasonality of nuptiality, natality and mortality in the Czech Republic and the factors that influence the seasonality. Despite the fact that these changes have been monitored since the 16th (nuptiality) and the 17th century (natality and mortality), the thesis focuses on the period from 1950s to 2012. Czech Republic is then compared with six other countries, with shorter reference period (2005-2012). Seasonal profile is represented by seasonal indexes and their variability is analyzed using the coefficient of variation. Seasonality of marriages was, especially in the 1950s, characterized by the accumulation of marriages in the last months of the year and in April, with later shift to the summer. The minimum was at the beginning of the period in the first quarter of the year and in May and later joined them low values in November and December. Due to superstitions about unhappy marriages, May was a month with a very low seasonal index throughout the period. The highest values of seasonal indexes of live births used to occur in the first half of the year and then shifted, as in the case of weddings, to the summer months. The minimum values did not...
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Senior tourism
Slavík, Lukáš ; Vágner, Jiří (advisor) ; Klufová, Renata (referee)
This diploma thesis analyzes the senior tourism, its development, status, structure and perceptions of accommodation facility owners. We used leisure development and the evolution of older people (55 years and 65 years) for the theoretical framing theory. We also used development funds and the theory of subjective and real age for better explaining the actual trends. The methodology of thesis was based on a survey, informal interviews and email survey. A questionnaire survey was conducted on two levels. The first aims directly at senior citizens (240 respondents) and the second at the owners of accommodation facilities. An important source of information was informal conversation among the elderly. These interviews helped to clarify and to explain phenomena that were discovered in surveys. Another source of information was planned as a telephone poll of travel agents. However, for fear of misuse of data and retaining its "know-how" there were no results and this method of information obtaining was avoided. A very important source of information were reviews of Czech and foreign literature. Finally, I used and Internet sources. The objectives of work include efforts to determine how the senior tourism is structured, whether it helps to balance the marginal tourist season. An additional goal was to try to...
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Holt-Winters method for exponential smoothing
Koritarová, Lenka ; Cipra, Tomáš (advisor) ; Prášková, Zuzana (referee)
"his thesis de-ls with the methods of exponenti-l smoothingF et (rst the prin iE ples of exponenti-l smoothing -re expl-inedF e fo us on -si -ppro- hesX sinE gleD dou le smoothing -nd the rolt¡s methodF "hese pro edures -re suit- le for the modeling time series without se-son-l omponentF rowever in pr- ti e there -re frequent time series with se-son-lityF por su h time series the roltE inter¡s method is usedF "his method is -sed just on the prin iples of exponenti-l smooE thingF sn the l-st p-rt of this thesisD there is demonstr-ted using this methods on re-l d-t-F
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Seasonality and periodicity in time series
Musil, Karel ; Jonáš, Petr (advisor) ; Cipra, Tomáš (referee)
This work deals with periodicity and seasonality in time series. After a time series periodicity topic is introduced, a seasonal component of time series and a seasonal adjustment is presented. Then basic approaches, used in current practice, are introduced. These are classic model approach, Box-Jenkins methodology, and spectral analysis. The described seasonal adjustment techniques are applied to the time series of the Czech import, export, and foreign trade balance. A brief description of potential problems, which are connected to the seasonal adjustment and are common in practice, is a part of the example as well.
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Methods of analysis of seasonality in demography
Myšáková, Gabriela ; Hulíková Tesárková, Klára (advisor) ; Rychtaříková, Jitka (referee)
Methods of analysis of seasonality in demografy Gabriela Myšáková Abstract The thesis presents statistical methods suited for analysis of seasonality in time-series. Three statistical methods have been thoroughly described, namely the time-series decomposition, the X12−ARIMA method and the cointegration of time-series. Further methods applicable for similar analysis have been briefly discussed as well. Three main methods have been subsequently applied to monthly demographic data for the Czech Republic and chosen European countries by natality, nuptiality and mortality. Seasonality has been discovered in all three demographic events and by using the time-series decomposition and the X12−ARIMA method for time-series lay out to separate units, and those progressions have been track by graphic and verbal interpretation. Cluster analysis has been applied to European countries nuptiality and mortality time-series in order to reveal similarities and dissimilarities among particular countries. All the methods were used onto data set by using appropriate procedures in statistical software SAS.
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Seasonality of reproduction in tropical birds
Kačírek, Vojtěch ; Sedláček, Ondřej (advisor) ; Tomášek, Oldřich (referee)
The aim of of this paper is to summarize the knowledge of reproduction seasonality of tropical birds. Work includes characteristics of individual tropical environment and changes in abiotic conditions, focusing on the question, in what sense are tropics aseasonal and what is not. The work includes an overview of methodologies for collecting data during field research focused on monitoring reproduction in birds. The main part of this work is to compare the differences between biogeographic regions, regions and their stimuli, which most commonly lead to the creation of seasonal reproduction, followed by a comparison of individual functional groups of birds (food guilds). Powered by TCPDF (www.tcpdf.org)
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Cementochronology and its importance in forensic anthropology and bioarchaeology: a comparison between individuals of different climatic zones
Pytlíčková, Kristýna ; Brůžek, Jaroslav (advisor) ; Velemínský, Petr (referee)
In the field of forensic anthropology and bioarchaeology, there is a constant search for more suitable and reliable methods that would allow the estimation of age and seasonality at the time of death of individuals. This work is devoted to the method of cementochronology. It is a method that works with continuously growing dental tissue - a cement layer, whose regular periodic growth is closely correlated with increasing age. The diploma thesis is based on 2 sets of teeth of individuals of known age and extraction season, which come from different geographically different populations - Czech and Malaysian. The group of the Czech population contains a total of 21 teeth, the group of the Malaysian population contains 11 teeth. Histological specimens were prepared from these samples and 5 sections were analyzed from each individual, in which the incremental lines of the root cement layer were counted and the nature of the last incremental line to estimate seasonality. The results of age estimation achieved by us in both groups, the Czech and Malaysian populations, were close to the chronological age of the individual. The average difference between these ages in the samples of the Czech population was 1,15 years, with the results being overestimated more often. The average difference in the sample of...
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Application of bioacoustic approaches in investigation of bird species interactions and community species richness
Vokurková, Jana ; Sedláček, Ondřej (advisor) ; Remeš, Vladimír (referee) ; Szymański, Paweł (referee)
Birdsong is one of the most fascinating communication tools in the animal kingdom, whether it is used for attracting a mate or in territory defense. In my dissertation, I present evidence that we can successfully study the role of birdsong in territorial behaviour, its seasonal variability, and ultimately its role in evolutionary processes thanks to modern bioacoustic and ecoacoustic approaches. By combining the bioacoustic approach with molecular analyses, I demonstrate that in the model system of two closely related passerine species, the heterospecific song convergence in their secondary contact zone is based on cultural transmission, and not on interspecific hybridisation and/or gene introgression. My dissertation further extends into the tropical zone, which is generally characterized by less pronounced environmental seasonality compared to the temperate zone. The study of potential seasonality in singing activity and the proportion of vocalizing species in this zone therefore requires year-round monitoring, which is possible thanks to the quite recent development of automated recording units (ARU). First, we confirmed that using ARU provides very similar estimates of community composition, species richness, and abundance to traditional field methods (point counts) in the specific conditions...
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