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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Vyhodnocení plodnosti raka signálního včetně post-ovulačního stavu vaječníků

FOJT, Martin January 2018 (has links)
The theoretical part of diploma thesis is aimed at breeding, growth and molting events in crayfish. Thesis is also aimed at life cycle and reproduction of three indigenous crayfish species (Astacus astacus, Austropotamobius torrentium, Pontastacus leptodactylus) and two introduced crayfish species (Faxonius limosus, Pacifastacus leniusculus). The results show apparent linear dependence between female size (POCL), abdomen surface (1M: y = -1061,2 + 65,4*x; r2 = 0,9829; p10-5; 2M: y = -1160,4 + 68,7*x; r2 = 0,8732; p < 10-5) and fertility (1M: y = -194,4 + 12,8*x; r2 = 0,4104 p = 0,0042; y = -330.9 + 15,9*x; r2 = 0.4372; p < 10-4) in once (1M) and twice (2M) molted females. As the length of carapax increase, the area of the abdomen increase and fertility increase in both groups of females. Furthermore, the differences in fertility, carapax length, abdomen surface, and weights in once and twice molted females of signal crayfish. In group of once molted females fertility (t-test, t = -3.12, p = 0.003), carapax length (t-test, t = -3.17, p = 0.003) = -3.24; p = 0.002) and the weight (t-test, t = -3.35; p = 0.002) was higher than in twice molted group of female. Consequentially evaluation of egg size of females. The size of the eggs did not differ between groups of females (1M and 2M) (t-test, t = -0.975, p = 0.335). The mean egg size for both groups of females was 2.71 ? 0.18 mm. Evaluation of post-ovulation conditions of the ovary, including visible signs of females that resorbed unovulated oocytes. Evaluating how much unovulated oocytes were found in the ovaries. Only in 46.4% of the total number of females were ovaries completely empty. In once and twice molted females were found in average 2.2 ? 3.8 and 1.9 ? 2.6. unovulated oocytes, respectively. In once molted, three females didn't lay eggs, two females lost the clutch of eggs. In twice molted females, six females did not lay the eggs and four females lost the clutch.
12

Analýza funkčních dat a modelování specifické míry úmrtnosti a plodnosti / Functional data analysis and modeling age-specific mortality and age-specific fertility

Bezchlebová, Daniela January 2014 (has links)
The aim of this thesis is to analyze two major indicators representing the processes of natural changes in population, which are not influenced by age structure -- age specific fertility rate and age specific mortality rate and to introduce functional data analysis, which has recently become increasingly applied in many scientific fields. The functional data analysis is introduced on the Czech demographic data set for more than last sixty years. The thesis briefly describes historical development of mortality and fertility and also describes selected methods of functional data analysis by using statistical program R. Functional data analysis provides a wide variety of graphics tools to explore the data which we called functional and help us to explore all typical and atypical features, identify outliers etc.
13

POROVNANIE ÚROVNE PLODNOSTI VO VYBRANÝCH KRAJINÁCH EÚ / Comparison of the level of fertility rate in selected EU countries.

Lešníková, Barbora January 2015 (has links)
The objective of this diploma thesis is on one side to analyze the fertility rate in Slovakia, Czech republic and Sweeden and to compare their development after the fall of the communist establishment from 1990 till 2014 and on the other side to categorize these countries to clusters of EU countries based on chosen variables using multidimensional statistical analysis. I consider the second chapter of the thesis, which focuses on analysis of intensity of fertility rate using direct standardization as well as on verification, whether connection between clusters of EU countries and their geographical location exists, to be my personal addition to the addressed issue. Based on my analyses, the conclusion of the thesis is a finding, that countries, which support reduced working hours have a higher total fertility rate. For that reason, if the natality is about to grow, it is a must to concentrate not only on states family politics but mainly to support the ability of young mothers to become part of a regular working process while on their maternity leave.
14

Vyhodnocení reprodukčních ukazatelů ve vybraném chovu ovcí / Evaluation of Reproductive Performance in a Particular Breed of Sheep

HUBENÁ, Michaela January 2009 (has links)
The primary objective of the thesis will be to evaluate the reproductive performance (the percentage of pregnancy, fertility, the number of lambs reared) in a particular breed of sheep. Another aim will be to assess the impact of certain factors on reproductive performance
15

Vývoj plodnosti ve vybraných zemích Evropy se zaměřením na efekt časování od druhé poloviny 20. století do současnosti / Fertility development in selected European countries considering the timing effect from the second half of the 20th century to the present

Ženíšková, Aneta January 2017 (has links)
Fertility development in selected European countries considering the timing effect from the second half of the 20th century to the present The main objective of this thesis is to evaluate the influence of the timing effect on the mean age of mothers at childbirth in the context of fertility development in selected European countries from the second half of the 20th century to the present. Another objective is to adjust the total fertility rate to the timing effect and consequently demonstrated how changes in fertility timing affect this period measure in selected countries at a given time fame. The last objective is an evaluation of the views of respondents from studied countries from the sample survey of the European Social Survey for the years 2004 and 2010 to the questions relating to the reconciliation of work and family as one of the factors affecting the timing of fertility. On the basis of Esping-Andersen's typology of welfare states, following states are selected: Netherlands, Portugal, Sweden, Switzerland and Ukraine. Changes of the mean age of mothers at childbirth are given not only by real changes in the timing of childbearing (the timing effect), but also by changes in the childbearing according to the birth order (the effect of fertility structure). The method of decomposition was used for...
16

Ženy na trhu práce / Women on labor market

Nová, Lucie January 2016 (has links)
The objective of this thesis is to analyze and verify the existence of causality between employment rate, unemployment rate as independent variable and fertility rate as dependent variable. Two stated hypotheses are being verified within this thesis. First of them says that by decreasing employment rate also the fertility rate decreases. Second says that decreasing unemployment rate has an impact on growth of fertility rate. The final part of essay deals with today´s often discussed concept of work life balance which in many countries supports high economical activity of women and higher fertility simultaneously. It draws attention on positives of alternative work arrangements as well as on negatives and deficits which goes together with its practicing. In the end of the thesis different possibilities of effective work life balance management are suggested.
17

Odklad plodnosti v České republice a ve vybraných evropských zemích v období 1990−2015 / Fertility postponement in the Czech Republic and selected European countries in the period 1990−2015

Tovarová, Lenka January 2017 (has links)
Fertility postponement in the Czech republic and selected European countries in the period 1990−2015 Abstract We have been able to observe the trend of shifting of maternity to later periods of life in European countries since the second half of the 20th century. However crucial for this thesis is to determine whether there have been disparity in delaying of maternity between selected Eastern European (Czech Republic, Slovakia, Poland) and Western European (Germany and Austria) countries since 1990 till present. The goal of this work is to find the relationship among setting of family policies, fertility rate of older women and respondents' views. In the first part of this thesis are outlined basic theories explaining postponing of maternity. There are also listed consequences related to the late maternity. The thesis touches a topic of family policies which influence the phenomenon of late maternity. It presents several fundamental tools of family policies and compares them among selected countries. The second part focuses on a description of demographic indicators that demonstrate the shift in timing of maternity. The main analysis in this thesis is a logistic regression, which explains respondent's views on issues related to a harmonization of family and employment by selected explanatory variables from...
18

Rodina a žena v kyrgyzské společnosti / The Family and Women in Kyrgyz Society

Gregorová, Barbora January 2016 (has links)
This dissertation focuses on the status of women in Central Asian society, particularly in Kyrgyzstan, and the phenomena of the Kyrgyz family that is the central part of daily living of Kyrgyz people. We provide an introduction to the region, followed by an analysis of a social stratification of Kyrgyz society and a various types of families. The next chapter describes the three major historical periods and changes in women's position in the society. The first period spans up to 1917, its end marked by the Bolshevik coup. Until that time, The Kyrgyz society was nomadic, organized into tribes, clans, and large patriarchal families. The 1920's were tumultuous times for the Central Asian region, at that time newly dominated by the Soviet rule, undergoing industrialization, public education, experiencing improvements in health care, but on the other hand also confiscation, forced resettlement, and russification. New rights have been granted to women, however local patriarchal and feudal traditions persisted and continued in the local societies. After the Soviet Union collapsed in 1991, Kyrgyz people started returning to their national traditions and discrimination against women started to be openly discussed in the society. Our historical retrospective analysis explores the major types of Kyrgyz...

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